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- Committer: Bazaar Package Importer
- Author(s): Matt Zimmerman
- Date: 2001-12-10 03:09:22 UTC
- Revision ID: james.westby@ubuntu.com-20011210030922-0vdtpz6a7mfwefo5
Tags: upstream-1.0.2
Import upstream version 1.0.2
- files added:
- build
- doc
- doc/images
- doc/ru
- flac.pbproj
- include
- include/FLAC
- man
- obj
- obj/bin
- obj/lib
- src
- src/flac
- src/libFLAC
- src/libFLAC/ia32
- src/libFLAC/include
- src/libFLAC/include/private
- src/libFLAC/include/protected
- src/metaflac
- src/monkeys_audio_utilities
- src/monkeys_audio_utilities/flac_mac
- src/monkeys_audio_utilities/flac_ren
- src/plugin_winamp2
- src/plugin_winamp3
- src/plugin_xmms
- src/test_streams
- src/test_unit
- test
added
removed
src/libFLAC/stream_encoder.c
1
/* libFLAC - Free Lossless Audio Codec library
2
* Copyright (C) 2000,2001 Josh Coalson
3
*
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* This library is free software; you can redistribute it and/or
5
* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12
* Library General Public License for more details.
13
*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
18
*/
19
20
#include <stdio.h>
21
#include <stdlib.h> /* for malloc() */
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#include <string.h> /* for memcpy() */
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#include "FLAC/assert.h"
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#include "FLAC/seek_table.h"
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#include "protected/stream_encoder.h"
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#include "private/bitbuffer.h"
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#include "private/bitmath.h"
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#include "private/crc.h"
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#include "private/cpu.h"
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#include "private/stream_encoder_framing.h"
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#include "private/fixed.h"
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#include "private/lpc.h"
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#include "private/md5.h"
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#include "private/memory.h"
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36
#ifdef min
37
#undef min
38
#endif
39
#define min(x,y) ((x)<(y)?(x):(y))
40
41
#ifdef max
42
#undef max
43
#endif
44
#define max(x,y) ((x)>(y)?(x):(y))
45
46
/***********************************************************************
47
*
48
* Private class method prototypes
49
*
50
***********************************************************************/
51
52
static FLAC__bool stream_encoder_resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_size);
53
static FLAC__bool stream_encoder_process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame);
54
static FLAC__bool stream_encoder_process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame);
55
static FLAC__bool stream_encoder_process_subframe_(FLAC__StreamEncoder *encoder, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool verbatim_only, const FLAC__FrameHeader *frame_header, unsigned subframe_bps, const FLAC__int32 integer_signal[], const FLAC__real real_signal[], FLAC__Subframe *subframe[2], FLAC__int32 *residual[2], unsigned *best_subframe, unsigned *best_bits);
56
static FLAC__bool stream_encoder_add_subframe_(FLAC__StreamEncoder *encoder, const FLAC__FrameHeader *frame_header, unsigned subframe_bps, const FLAC__Subframe *subframe, FLAC__BitBuffer *frame);
57
static unsigned stream_encoder_evaluate_constant_subframe_(const FLAC__int32 signal, unsigned subframe_bps, FLAC__Subframe *subframe);
58
static unsigned stream_encoder_evaluate_fixed_subframe_(FLAC__StreamEncoder *encoder, const FLAC__int32 signal[], FLAC__int32 residual[], FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned raw_bits_per_partition[], unsigned blocksize, unsigned subframe_bps, unsigned order, unsigned rice_parameter, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool do_escape_coding, unsigned rice_parameter_search_dist, FLAC__Subframe *subframe);
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static unsigned stream_encoder_evaluate_lpc_subframe_(FLAC__StreamEncoder *encoder, const FLAC__int32 signal[], FLAC__int32 residual[], FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned raw_bits_per_partition[], const FLAC__real lp_coeff[], unsigned blocksize, unsigned subframe_bps, unsigned order, unsigned qlp_coeff_precision, unsigned rice_parameter, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool do_escape_coding, unsigned rice_parameter_search_dist, FLAC__Subframe *subframe);
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static unsigned stream_encoder_evaluate_verbatim_subframe_(const FLAC__int32 signal[], unsigned blocksize, unsigned subframe_bps, FLAC__Subframe *subframe);
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static unsigned stream_encoder_find_best_partition_order_(struct FLAC__StreamEncoderPrivate *private_, const FLAC__int32 residual[], FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned raw_bits_per_partition[], unsigned residual_samples, unsigned predictor_order, unsigned rice_parameter, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool do_escape_coding, unsigned rice_parameter_search_dist, unsigned *best_partition_order, unsigned best_parameters[], unsigned best_raw_bits[]);
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static void stream_encoder_precompute_partition_info_sums_(const FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned residual_samples, unsigned predictor_order, unsigned min_partition_order, unsigned max_partition_order);
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static void stream_encoder_precompute_partition_info_escapes_(const FLAC__int32 residual[], unsigned raw_bits_per_partition[], unsigned residual_samples, unsigned predictor_order, unsigned min_partition_order, unsigned max_partition_order);
64
#ifdef DONT_ESTIMATE_RICE_BITS
65
static FLAC__bool stream_encoder_set_partitioned_rice_(const FLAC__uint32 abs_residual[], const FLAC__int32 residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, unsigned parameters[], unsigned *bits);
66
static FLAC__bool stream_encoder_set_partitioned_rice_with_precompute_(const FLAC__int32 residual[], const FLAC__uint64 abs_residual_partition_sums[], const unsigned raw_bits_per_partition[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, const FLAC__bool search_for_escapes, unsigned parameters[], unsigned raw_bits[], unsigned *bits);
67
#else
68
static FLAC__bool stream_encoder_set_partitioned_rice_(const FLAC__uint32 abs_residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, unsigned parameters[], unsigned *bits);
69
static FLAC__bool stream_encoder_set_partitioned_rice_with_precompute_(const FLAC__uint32 abs_residual[], const FLAC__uint64 abs_residual_partition_sums[], const unsigned raw_bits_per_partition[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, const FLAC__bool search_for_escapes, unsigned parameters[], unsigned raw_bits[], unsigned *bits);
70
#endif
71
static unsigned stream_encoder_get_wasted_bits_(FLAC__int32 signal[], unsigned samples);
72
73
/***********************************************************************
74
*
75
* Private class data
76
*
77
***********************************************************************/
78
79
typedef struct FLAC__StreamEncoderPrivate {
80
unsigned input_capacity; /* current size (in samples) of the signal and residual buffers */
81
FLAC__int32 *integer_signal[FLAC__MAX_CHANNELS]; /* the integer version of the input signal */
82
FLAC__int32 *integer_signal_mid_side[2]; /* the integer version of the mid-side input signal (stereo only) */
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FLAC__real *real_signal[FLAC__MAX_CHANNELS]; /* the floating-point version of the input signal */
84
FLAC__real *real_signal_mid_side[2]; /* the floating-point version of the mid-side input signal (stereo only) */
85
unsigned subframe_bps[FLAC__MAX_CHANNELS]; /* the effective bits per sample of the input signal (stream bps - wasted bits) */
86
unsigned subframe_bps_mid_side[2]; /* the effective bits per sample of the mid-side input signal (stream bps - wasted bits + 0/1) */
87
FLAC__int32 *residual_workspace[FLAC__MAX_CHANNELS][2]; /* each channel has a candidate and best workspace where the subframe residual signals will be stored */
88
FLAC__int32 *residual_workspace_mid_side[2][2];
89
FLAC__Subframe subframe_workspace[FLAC__MAX_CHANNELS][2];
90
FLAC__Subframe subframe_workspace_mid_side[2][2];
91
FLAC__Subframe *subframe_workspace_ptr[FLAC__MAX_CHANNELS][2];
92
FLAC__Subframe *subframe_workspace_ptr_mid_side[2][2];
93
unsigned best_subframe[FLAC__MAX_CHANNELS]; /* index into the above workspaces */
94
unsigned best_subframe_mid_side[2];
95
unsigned best_subframe_bits[FLAC__MAX_CHANNELS]; /* size in bits of the best subframe for each channel */
96
unsigned best_subframe_bits_mid_side[2];
97
FLAC__uint32 *abs_residual; /* workspace where abs(candidate residual) is stored */
98
FLAC__uint64 *abs_residual_partition_sums; /* workspace where the sum of abs(candidate residual) for each partition is stored */
99
unsigned *raw_bits_per_partition; /* workspace where the sum of silog2(candidate residual) for each partition is stored */
100
FLAC__BitBuffer frame; /* the current frame being worked on */
101
double loose_mid_side_stereo_frames_exact; /* exact number of frames the encoder will use before trying both independent and mid/side frames again */
102
unsigned loose_mid_side_stereo_frames; /* rounded number of frames the encoder will use before trying both independent and mid/side frames again */
103
unsigned loose_mid_side_stereo_frame_count; /* number of frames using the current channel assignment */
104
FLAC__ChannelAssignment last_channel_assignment;
105
FLAC__StreamMetaData metadata;
106
unsigned current_sample_number;
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unsigned current_frame_number;
108
struct MD5Context md5context;
109
FLAC__CPUInfo cpuinfo;
110
unsigned (*local_fixed_compute_best_predictor)(const FLAC__int32 data[], unsigned data_len, FLAC__real residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]);
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void (*local_lpc_compute_autocorrelation)(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[]);
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void (*local_lpc_compute_residual_from_qlp_coefficients)(const FLAC__int32 data[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]);
113
void (*local_lpc_compute_residual_from_qlp_coefficients_16bit)(const FLAC__int32 data[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]);
114
FLAC__bool use_wide_by_block; /* use slow 64-bit versions of some functions because of the block size */
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FLAC__bool use_wide_by_partition; /* use slow 64-bit versions of some functions because of the min partition order and blocksize */
116
FLAC__bool use_wide_by_order; /* use slow 64-bit versions of some functions because of the lpc order */
117
FLAC__bool precompute_partition_sums; /* our initial guess as to whether precomputing the partitions sums will be a speed improvement */
118
FLAC__StreamEncoderWriteStatus (*write_callback)(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
119
void (*metadata_callback)(const FLAC__StreamEncoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data);
120
void *client_data;
121
/* unaligned (original) pointers to allocated data */
122
FLAC__int32 *integer_signal_unaligned[FLAC__MAX_CHANNELS];
123
FLAC__int32 *integer_signal_mid_side_unaligned[2];
124
FLAC__real *real_signal_unaligned[FLAC__MAX_CHANNELS];
125
FLAC__real *real_signal_mid_side_unaligned[2];
126
FLAC__int32 *residual_workspace_unaligned[FLAC__MAX_CHANNELS][2];
127
FLAC__int32 *residual_workspace_mid_side_unaligned[2][2];
128
FLAC__uint32 *abs_residual_unaligned;
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FLAC__uint64 *abs_residual_partition_sums_unaligned;
130
unsigned *raw_bits_per_partition_unaligned;
131
/*
132
* These fields have been moved here from private function local
133
* declarations merely to save stack space during encoding.
134
*/
135
FLAC__real lp_coeff[FLAC__MAX_LPC_ORDER][FLAC__MAX_LPC_ORDER]; /* from stream_encoder_process_subframe_() */
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unsigned parameters[2][1 << FLAC__MAX_RICE_PARTITION_ORDER], raw_bits[2][1 << FLAC__MAX_RICE_PARTITION_ORDER]; /* from stream_encoder_find_best_partition_order_() */
137
} FLAC__StreamEncoderPrivate;
138
139
/***********************************************************************
140
*
141
* Public static class data
142
*
143
***********************************************************************/
144
145
const char *FLAC__StreamEncoderStateString[] = {
146
"FLAC__STREAM_ENCODER_OK",
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"FLAC__STREAM_ENCODER_INVALID_CALLBACK",
148
"FLAC__STREAM_ENCODER_INVALID_NUMBER_OF_CHANNELS",
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"FLAC__STREAM_ENCODER_INVALID_BITS_PER_SAMPLE",
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"FLAC__STREAM_ENCODER_INVALID_SAMPLE_RATE",
151
"FLAC__STREAM_ENCODER_INVALID_BLOCK_SIZE",
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"FLAC__STREAM_ENCODER_INVALID_QLP_COEFF_PRECISION",
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"FLAC__STREAM_ENCODER_MID_SIDE_CHANNELS_MISMATCH",
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"FLAC__STREAM_ENCODER_MID_SIDE_SAMPLE_SIZE_MISMATCH",
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"FLAC__STREAM_ENCODER_ILLEGAL_MID_SIDE_FORCE",
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"FLAC__STREAM_ENCODER_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER",
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"FLAC__STREAM_ENCODER_NOT_STREAMABLE",
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"FLAC__STREAM_ENCODER_FRAMING_ERROR",
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"FLAC__STREAM_ENCODER_INVALID_SEEK_TABLE",
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"FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING",
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"FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_WRITING",
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"FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR",
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"FLAC__STREAM_ENCODER_ALREADY_INITIALIZED",
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"FLAC__STREAM_ENCODER_UNINITIALIZED"
165
};
166
167
const char *FLAC__StreamEncoderWriteStatusString[] = {
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"FLAC__STREAM_ENCODER_WRITE_OK",
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"FLAC__STREAM_ENCODER_WRITE_FATAL_ERROR"
170
};
171
172
/***********************************************************************
173
*
174
* Class constructor/destructor
175
*
176
***********************************************************************/
177
FLAC__StreamEncoder *FLAC__stream_encoder_new()
178
{
179
FLAC__StreamEncoder *encoder;
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181
FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */
182
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encoder = (FLAC__StreamEncoder*)malloc(sizeof(FLAC__StreamEncoder));
184
if(encoder == 0) {
185
return 0;
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}
187
encoder->protected_ = (FLAC__StreamEncoderProtected*)malloc(sizeof(FLAC__StreamEncoderProtected));
188
if(encoder->protected_ == 0) {
189
free(encoder);
190
return 0;
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}
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encoder->private_ = (FLAC__StreamEncoderPrivate*)malloc(sizeof(FLAC__StreamEncoderPrivate));
193
if(encoder->private_ == 0) {
194
free(encoder->protected_);
195
free(encoder);
196
return 0;
197
}
198
199
encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED;
200
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encoder->protected_->streamable_subset = true;
202
encoder->protected_->do_mid_side_stereo = false;
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encoder->protected_->loose_mid_side_stereo = false;
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encoder->protected_->channels = 2;
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encoder->protected_->bits_per_sample = 16;
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encoder->protected_->sample_rate = 44100;
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encoder->protected_->blocksize = 1152;
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encoder->protected_->max_lpc_order = 0;
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encoder->protected_->qlp_coeff_precision = 0;
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encoder->protected_->do_qlp_coeff_prec_search = false;
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encoder->protected_->do_exhaustive_model_search = false;
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encoder->protected_->do_escape_coding = false;
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encoder->protected_->min_residual_partition_order = 0;
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encoder->protected_->max_residual_partition_order = 0;
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encoder->protected_->rice_parameter_search_dist = 0;
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encoder->protected_->total_samples_estimate = 0;
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encoder->protected_->seek_table = 0;
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encoder->protected_->padding = 0;
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encoder->protected_->last_metadata_is_last = true;
220
221
encoder->private_->write_callback = 0;
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encoder->private_->metadata_callback = 0;
223
encoder->private_->client_data = 0;
224
225
return encoder;
226
}
227
228
void FLAC__stream_encoder_delete(FLAC__StreamEncoder *encoder)
229
{
230
FLAC__ASSERT(encoder != 0);
231
FLAC__ASSERT(encoder->protected_ != 0);
232
FLAC__ASSERT(encoder->private_ != 0);
233
234
free(encoder->private_);
235
free(encoder->protected_);
236
free(encoder);
237
}
238
239
/***********************************************************************
240
*
241
* Public class methods
242
*
243
***********************************************************************/
244
245
FLAC__StreamEncoderState FLAC__stream_encoder_init(FLAC__StreamEncoder *encoder)
246
{
247
unsigned i;
248
FLAC__StreamMetaData padding_block;
249
FLAC__StreamMetaData seek_table_block;
250
251
FLAC__ASSERT(encoder != 0);
252
253
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
254
return encoder->protected_->state = FLAC__STREAM_ENCODER_ALREADY_INITIALIZED;
255
256
encoder->protected_->state = FLAC__STREAM_ENCODER_OK;
257
258
if(0 == encoder->private_->write_callback || 0 == encoder->private_->metadata_callback)
259
return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_CALLBACK;
260
261
if(encoder->protected_->channels == 0 || encoder->protected_->channels > FLAC__MAX_CHANNELS)
262
return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_NUMBER_OF_CHANNELS;
263
264
if(encoder->protected_->do_mid_side_stereo && encoder->protected_->channels != 2)
265
return encoder->protected_->state = FLAC__STREAM_ENCODER_MID_SIDE_CHANNELS_MISMATCH;
266
267
if(encoder->protected_->loose_mid_side_stereo && !encoder->protected_->do_mid_side_stereo)
268
return encoder->protected_->state = FLAC__STREAM_ENCODER_ILLEGAL_MID_SIDE_FORCE;
269
270
if(encoder->protected_->bits_per_sample >= 32)
271
encoder->protected_->do_mid_side_stereo = false; /* since we do 32-bit math, the side channel would have 33 bps and overflow */
272
273
if(encoder->protected_->bits_per_sample < FLAC__MIN_BITS_PER_SAMPLE || encoder->protected_->bits_per_sample > FLAC__MAX_BITS_PER_SAMPLE)
274
return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_BITS_PER_SAMPLE;
275
276
if(encoder->protected_->sample_rate == 0 || encoder->protected_->sample_rate > FLAC__MAX_SAMPLE_RATE)
277
return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_SAMPLE_RATE;
278
279
if(encoder->protected_->blocksize < FLAC__MIN_BLOCK_SIZE || encoder->protected_->blocksize > FLAC__MAX_BLOCK_SIZE)
280
return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_BLOCK_SIZE;
281
282
if(encoder->protected_->blocksize < encoder->protected_->max_lpc_order)
283
return encoder->protected_->state = FLAC__STREAM_ENCODER_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER;
284
285
if(encoder->protected_->qlp_coeff_precision == 0) {
286
if(encoder->protected_->bits_per_sample < 16) {
287
/* @@@ need some data about how to set this here w.r.t. blocksize and sample rate */
288
/* @@@ until then we'll make a guess */
289
encoder->protected_->qlp_coeff_precision = max(5, 2 + encoder->protected_->bits_per_sample / 2);
290
}
291
else if(encoder->protected_->bits_per_sample == 16) {
292
if(encoder->protected_->blocksize <= 192)
293
encoder->protected_->qlp_coeff_precision = 7;
294
else if(encoder->protected_->blocksize <= 384)
295
encoder->protected_->qlp_coeff_precision = 8;
296
else if(encoder->protected_->blocksize <= 576)
297
encoder->protected_->qlp_coeff_precision = 9;
298
else if(encoder->protected_->blocksize <= 1152)
299
encoder->protected_->qlp_coeff_precision = 10;
300
else if(encoder->protected_->blocksize <= 2304)
301
encoder->protected_->qlp_coeff_precision = 11;
302
else if(encoder->protected_->blocksize <= 4608)
303
encoder->protected_->qlp_coeff_precision = 12;
304
else
305
encoder->protected_->qlp_coeff_precision = 13;
306
}
307
else {
308
encoder->protected_->qlp_coeff_precision = min(13, 8*sizeof(FLAC__int32) - encoder->protected_->bits_per_sample - 1 - 2); /* @@@ -2 to keep things 32-bit safe */
309
}
310
}
311
else if(encoder->protected_->qlp_coeff_precision < FLAC__MIN_QLP_COEFF_PRECISION || encoder->protected_->qlp_coeff_precision + encoder->protected_->bits_per_sample >= 8*sizeof(FLAC__uint32) || encoder->protected_->qlp_coeff_precision >= (1u<<FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN))
312
return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_QLP_COEFF_PRECISION;
313
314
if(encoder->protected_->streamable_subset) {
315
/*@@@ add check for blocksize here */
316
if(encoder->protected_->bits_per_sample != 8 && encoder->protected_->bits_per_sample != 12 && encoder->protected_->bits_per_sample != 16 && encoder->protected_->bits_per_sample != 20 && encoder->protected_->bits_per_sample != 24)
317
return encoder->protected_->state = FLAC__STREAM_ENCODER_NOT_STREAMABLE;
318
if(encoder->protected_->sample_rate > 655350)
319
return encoder->protected_->state = FLAC__STREAM_ENCODER_NOT_STREAMABLE;
320
}
321
322
if(encoder->protected_->max_residual_partition_order >= (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
323
encoder->protected_->max_residual_partition_order = (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN) - 1;
324
if(encoder->protected_->min_residual_partition_order >= encoder->protected_->max_residual_partition_order)
325
encoder->protected_->min_residual_partition_order = encoder->protected_->max_residual_partition_order;
326
327
encoder->private_->input_capacity = 0;
328
for(i = 0; i < encoder->protected_->channels; i++) {
329
encoder->private_->integer_signal_unaligned[i] = encoder->private_->integer_signal[i] = 0;
330
encoder->private_->real_signal_unaligned[i] = encoder->private_->real_signal[i] = 0;
331
}
332
for(i = 0; i < 2; i++) {
333
encoder->private_->integer_signal_mid_side_unaligned[i] = encoder->private_->integer_signal_mid_side[i] = 0;
334
encoder->private_->real_signal_mid_side_unaligned[i] = encoder->private_->real_signal_mid_side[i] = 0;
335
}
336
for(i = 0; i < encoder->protected_->channels; i++) {
337
encoder->private_->residual_workspace_unaligned[i][0] = encoder->private_->residual_workspace[i][0] = 0;
338
encoder->private_->residual_workspace_unaligned[i][1] = encoder->private_->residual_workspace[i][1] = 0;
339
encoder->private_->best_subframe[i] = 0;
340
}
341
for(i = 0; i < 2; i++) {
342
encoder->private_->residual_workspace_mid_side_unaligned[i][0] = encoder->private_->residual_workspace_mid_side[i][0] = 0;
343
encoder->private_->residual_workspace_mid_side_unaligned[i][1] = encoder->private_->residual_workspace_mid_side[i][1] = 0;
344
encoder->private_->best_subframe_mid_side[i] = 0;
345
}
346
for(i = 0; i < encoder->protected_->channels; i++) {
347
encoder->private_->subframe_workspace_ptr[i][0] = &encoder->private_->subframe_workspace[i][0];
348
encoder->private_->subframe_workspace_ptr[i][1] = &encoder->private_->subframe_workspace[i][1];
349
}
350
for(i = 0; i < 2; i++) {
351
encoder->private_->subframe_workspace_ptr_mid_side[i][0] = &encoder->private_->subframe_workspace_mid_side[i][0];
352
encoder->private_->subframe_workspace_ptr_mid_side[i][1] = &encoder->private_->subframe_workspace_mid_side[i][1];
353
}
354
encoder->private_->abs_residual_unaligned = encoder->private_->abs_residual = 0;
355
encoder->private_->abs_residual_partition_sums_unaligned = encoder->private_->abs_residual_partition_sums = 0;
356
encoder->private_->raw_bits_per_partition_unaligned = encoder->private_->raw_bits_per_partition = 0;
357
encoder->private_->loose_mid_side_stereo_frames_exact = (double)encoder->protected_->sample_rate * 0.4 / (double)encoder->protected_->blocksize;
358
encoder->private_->loose_mid_side_stereo_frames = (unsigned)(encoder->private_->loose_mid_side_stereo_frames_exact + 0.5);
359
if(encoder->private_->loose_mid_side_stereo_frames == 0)
360
encoder->private_->loose_mid_side_stereo_frames = 1;
361
encoder->private_->loose_mid_side_stereo_frame_count = 0;
362
encoder->private_->current_sample_number = 0;
363
encoder->private_->current_frame_number = 0;
364
365
encoder->private_->use_wide_by_block = (encoder->protected_->bits_per_sample + FLAC__bitmath_ilog2(encoder->protected_->blocksize)+1 > 30);
366
encoder->private_->use_wide_by_order = (encoder->protected_->bits_per_sample + FLAC__bitmath_ilog2(max(encoder->protected_->max_lpc_order, FLAC__MAX_FIXED_ORDER))+1 > 30); /*@@@ need to use this? */
367
encoder->private_->use_wide_by_partition = (false); /*@@@ need to set this */
368
369
/*
370
* get the CPU info and set the function pointers
371
*/
372
FLAC__cpu_info(&encoder->private_->cpuinfo);
373
/* first default to the non-asm routines */
374
encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation;
375
encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor;
376
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients;
377
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients;
378
/* now override with asm where appropriate */
379
#ifndef FLAC__NO_ASM
380
if(encoder->private_->cpuinfo.use_asm) {
381
#ifdef FLAC__CPU_IA32
382
FLAC__ASSERT(encoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_IA32);
383
#ifdef FLAC__HAS_NASM
384
if(0 && encoder->private_->cpuinfo.data.ia32.sse) {
385
if(encoder->protected_->max_lpc_order < 4)
386
encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_4;
387
else if(encoder->protected_->max_lpc_order < 8)
388
encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_8;
389
else if(encoder->protected_->max_lpc_order < 12)
390
encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_12;
391
else
392
encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32;
393
}
394
else if(encoder->private_->cpuinfo.data.ia32._3dnow)
395
encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_3dnow;
396
else
397
encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32;
398
if(encoder->private_->cpuinfo.data.ia32.mmx && encoder->private_->cpuinfo.data.ia32.cmov)
399
encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_asm_ia32_mmx_cmov;
400
if(encoder->private_->cpuinfo.data.ia32.mmx) {
401
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
402
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx;
403
}
404
else {
405
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
406
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
407
}
408
#endif
409
#endif
410
}
411
#endif
412
/* finally override based on wide-ness if necessary */
413
if(encoder->private_->use_wide_by_block) {
414
encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_wide;
415
}
416
417
/* we require precompute_partition_sums if do_escape_coding because of their intertwined nature */
418
encoder->private_->precompute_partition_sums = (encoder->protected_->max_residual_partition_order > encoder->protected_->min_residual_partition_order) || encoder->protected_->do_escape_coding;
419
420
if(!stream_encoder_resize_buffers_(encoder, encoder->protected_->blocksize)) {
421
/* the above function sets the state for us in case of an error */
422
return encoder->protected_->state;
423
}
424
FLAC__bitbuffer_init(&encoder->private_->frame);
425
426
/*
427
* write the stream header
428
*/
429
430
if(!FLAC__bitbuffer_clear(&encoder->private_->frame))
431
return encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
432
if(!FLAC__bitbuffer_write_raw_uint32(&encoder->private_->frame, FLAC__STREAM_SYNC, FLAC__STREAM_SYNC_LEN))
433
return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
434
435
encoder->private_->metadata.type = FLAC__METADATA_TYPE_STREAMINFO;
436
encoder->private_->metadata.is_last = (encoder->protected_->seek_table == 0 && encoder->protected_->padding == 0 && encoder->protected_->last_metadata_is_last);
437
encoder->private_->metadata.length = FLAC__STREAM_METADATA_STREAMINFO_LENGTH;
438
encoder->private_->metadata.data.stream_info.min_blocksize = encoder->protected_->blocksize; /* this encoder uses the same blocksize for the whole stream */
439
encoder->private_->metadata.data.stream_info.max_blocksize = encoder->protected_->blocksize;
440
encoder->private_->metadata.data.stream_info.min_framesize = 0; /* we don't know this yet; have to fill it in later */
441
encoder->private_->metadata.data.stream_info.max_framesize = 0; /* we don't know this yet; have to fill it in later */
442
encoder->private_->metadata.data.stream_info.sample_rate = encoder->protected_->sample_rate;
443
encoder->private_->metadata.data.stream_info.channels = encoder->protected_->channels;
444
encoder->private_->metadata.data.stream_info.bits_per_sample = encoder->protected_->bits_per_sample;
445
encoder->private_->metadata.data.stream_info.total_samples = encoder->protected_->total_samples_estimate; /* we will replace this later with the real total */
446
memset(encoder->private_->metadata.data.stream_info.md5sum, 0, 16); /* we don't know this yet; have to fill it in later */
447
MD5Init(&encoder->private_->md5context);
448
if(!FLAC__add_metadata_block(&encoder->private_->metadata, &encoder->private_->frame))
449
return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
450
451
if(0 != encoder->protected_->seek_table) {
452
if(!FLAC__seek_table_is_valid(encoder->protected_->seek_table))
453
return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_SEEK_TABLE;
454
seek_table_block.type = FLAC__METADATA_TYPE_SEEKTABLE;
455
seek_table_block.is_last = (encoder->protected_->padding == 0 && encoder->protected_->last_metadata_is_last);
456
seek_table_block.length = encoder->protected_->seek_table->num_points * FLAC__STREAM_METADATA_SEEKPOINT_LEN;
457
seek_table_block.data.seek_table = *encoder->protected_->seek_table;
458
if(!FLAC__add_metadata_block(&seek_table_block, &encoder->private_->frame))
459
return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
460
}
461
462
/* add a PADDING block if requested */
463
if(encoder->protected_->padding > 0) {
464
padding_block.type = FLAC__METADATA_TYPE_PADDING;
465
padding_block.is_last = encoder->protected_->last_metadata_is_last;
466
padding_block.length = encoder->protected_->padding;
467
if(!FLAC__add_metadata_block(&padding_block, &encoder->private_->frame))
468
return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
469
}
470
471
FLAC__ASSERT(encoder->private_->frame.bits == 0); /* assert that we're byte-aligned before writing */
472
FLAC__ASSERT(encoder->private_->frame.total_consumed_bits == 0); /* assert that no reading of the buffer was done */
473
if(encoder->private_->write_callback(encoder, encoder->private_->frame.buffer, encoder->private_->frame.bytes, 0, encoder->private_->current_frame_number, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_OK)
474
return encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_WRITING;
475
476
/* now that the metadata block is written, we can init this to an absurdly-high value... */
477
encoder->private_->metadata.data.stream_info.min_framesize = (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN) - 1;
478
/* ... and clear this to 0 */
479
encoder->private_->metadata.data.stream_info.total_samples = 0;
480
481
return encoder->protected_->state;
482
}
483
484
void FLAC__stream_encoder_finish(FLAC__StreamEncoder *encoder)
485
{
486
unsigned i, channel;
487
488
FLAC__ASSERT(encoder != 0);
489
if(encoder->protected_->state == FLAC__STREAM_ENCODER_UNINITIALIZED)
490
return;
491
if(encoder->private_->current_sample_number != 0) {
492
encoder->protected_->blocksize = encoder->private_->current_sample_number;
493
stream_encoder_process_frame_(encoder, true); /* true => is last frame */
494
}
495
MD5Final(encoder->private_->metadata.data.stream_info.md5sum, &encoder->private_->md5context);
496
encoder->private_->metadata_callback(encoder, &encoder->private_->metadata, encoder->private_->client_data);
497
for(i = 0; i < encoder->protected_->channels; i++) {
498
if(encoder->private_->integer_signal_unaligned[i] != 0) {
499
free(encoder->private_->integer_signal_unaligned[i]);
500
encoder->private_->integer_signal_unaligned[i] = 0;
501
}
502
if(encoder->private_->real_signal_unaligned[i] != 0) {
503
free(encoder->private_->real_signal_unaligned[i]);
504
encoder->private_->real_signal_unaligned[i] = 0;
505
}
506
}
507
for(i = 0; i < 2; i++) {
508
if(encoder->private_->integer_signal_mid_side_unaligned[i] != 0) {
509
free(encoder->private_->integer_signal_mid_side_unaligned[i]);
510
encoder->private_->integer_signal_mid_side_unaligned[i] = 0;
511
}
512
if(encoder->private_->real_signal_mid_side_unaligned[i] != 0) {
513
free(encoder->private_->real_signal_mid_side_unaligned[i]);
514
encoder->private_->real_signal_mid_side_unaligned[i] = 0;
515
}
516
}
517
for(channel = 0; channel < encoder->protected_->channels; channel++) {
518
for(i = 0; i < 2; i++) {
519
if(encoder->private_->residual_workspace_unaligned[channel][i] != 0) {
520
free(encoder->private_->residual_workspace_unaligned[channel][i]);
521
encoder->private_->residual_workspace_unaligned[channel][i] = 0;
522
}
523
}
524
}
525
for(channel = 0; channel < 2; channel++) {
526
for(i = 0; i < 2; i++) {
527
if(encoder->private_->residual_workspace_mid_side_unaligned[channel][i] != 0) {
528
free(encoder->private_->residual_workspace_mid_side_unaligned[channel][i]);
529
encoder->private_->residual_workspace_mid_side_unaligned[channel][i] = 0;
530
}
531
}
532
}
533
if(encoder->private_->abs_residual_unaligned != 0) {
534
free(encoder->private_->abs_residual_unaligned);
535
encoder->private_->abs_residual_unaligned = 0;
536
}
537
if(encoder->private_->abs_residual_partition_sums_unaligned != 0) {
538
free(encoder->private_->abs_residual_partition_sums_unaligned);
539
encoder->private_->abs_residual_partition_sums_unaligned = 0;
540
}
541
if(encoder->private_->raw_bits_per_partition_unaligned != 0) {
542
free(encoder->private_->raw_bits_per_partition_unaligned);
543
encoder->private_->raw_bits_per_partition_unaligned = 0;
544
}
545
FLAC__bitbuffer_free(&encoder->private_->frame);
546
547
encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED;
548
}
549
550
FLAC__bool FLAC__stream_encoder_set_streamable_subset(const FLAC__StreamEncoder *encoder, FLAC__bool value)
551
{
552
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
553
return false;
554
encoder->protected_->streamable_subset = value;
555
return true;
556
}
557
558
FLAC__bool FLAC__stream_encoder_set_do_mid_side_stereo(const FLAC__StreamEncoder *encoder, FLAC__bool value)
559
{
560
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
561
return false;
562
encoder->protected_->do_mid_side_stereo = value;
563
return true;
564
}
565
566
FLAC__bool FLAC__stream_encoder_set_loose_mid_side_stereo(const FLAC__StreamEncoder *encoder, FLAC__bool value)
567
{
568
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
569
return false;
570
encoder->protected_->loose_mid_side_stereo = value;
571
return true;
572
}
573
574
FLAC__bool FLAC__stream_encoder_set_channels(const FLAC__StreamEncoder *encoder, unsigned value)
575
{
576
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
577
return false;
578
encoder->protected_->channels = value;
579
return true;
580
}
581
582
FLAC__bool FLAC__stream_encoder_set_bits_per_sample(const FLAC__StreamEncoder *encoder, unsigned value)
583
{
584
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
585
return false;
586
encoder->protected_->bits_per_sample = value;
587
return true;
588
}
589
590
FLAC__bool FLAC__stream_encoder_set_sample_rate(const FLAC__StreamEncoder *encoder, unsigned value)
591
{
592
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
593
return false;
594
encoder->protected_->sample_rate = value;
595
return true;
596
}
597
598
FLAC__bool FLAC__stream_encoder_set_blocksize(const FLAC__StreamEncoder *encoder, unsigned value)
599
{
600
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
601
return false;
602
encoder->protected_->blocksize = value;
603
return true;
604
}
605
606
FLAC__bool FLAC__stream_encoder_set_max_lpc_order(const FLAC__StreamEncoder *encoder, unsigned value)
607
{
608
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
609
return false;
610
encoder->protected_->max_lpc_order = value;
611
return true;
612
}
613
614
FLAC__bool FLAC__stream_encoder_set_qlp_coeff_precision(const FLAC__StreamEncoder *encoder, unsigned value)
615
{
616
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
617
return false;
618
encoder->protected_->qlp_coeff_precision = value;
619
return true;
620
}
621
622
FLAC__bool FLAC__stream_encoder_set_do_qlp_coeff_prec_search(const FLAC__StreamEncoder *encoder, FLAC__bool value)
623
{
624
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
625
return false;
626
encoder->protected_->do_qlp_coeff_prec_search = value;
627
return true;
628
}
629
630
FLAC__bool FLAC__stream_encoder_set_do_escape_coding(const FLAC__StreamEncoder *encoder, FLAC__bool value)
631
{
632
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
633
return false;
634
encoder->protected_->do_escape_coding = value;
635
return true;
636
}
637
638
FLAC__bool FLAC__stream_encoder_set_do_exhaustive_model_search(const FLAC__StreamEncoder *encoder, FLAC__bool value)
639
{
640
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
641
return false;
642
encoder->protected_->do_exhaustive_model_search = value;
643
return true;
644
}
645
646
FLAC__bool FLAC__stream_encoder_set_min_residual_partition_order(const FLAC__StreamEncoder *encoder, unsigned value)
647
{
648
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
649
return false;
650
encoder->protected_->min_residual_partition_order = value;
651
return true;
652
}
653
654
FLAC__bool FLAC__stream_encoder_set_max_residual_partition_order(const FLAC__StreamEncoder *encoder, unsigned value)
655
{
656
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
657
return false;
658
encoder->protected_->max_residual_partition_order = value;
659
return true;
660
}
661
662
FLAC__bool FLAC__stream_encoder_set_rice_parameter_search_dist(const FLAC__StreamEncoder *encoder, unsigned value)
663
{
664
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
665
return false;
666
encoder->protected_->rice_parameter_search_dist = value;
667
return true;
668
}
669
670
FLAC__bool FLAC__stream_encoder_set_total_samples_estimate(const FLAC__StreamEncoder *encoder, FLAC__uint64 value)
671
{
672
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
673
return false;
674
encoder->protected_->total_samples_estimate = value;
675
return true;
676
}
677
678
FLAC__bool FLAC__stream_encoder_set_seek_table(const FLAC__StreamEncoder *encoder, const FLAC__StreamMetaData_SeekTable *value)
679
{
680
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
681
return false;
682
encoder->protected_->seek_table = value;
683
return true;
684
}
685
686
FLAC__bool FLAC__stream_encoder_set_padding(const FLAC__StreamEncoder *encoder, unsigned value)
687
{
688
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
689
return false;
690
encoder->protected_->padding = value;
691
return true;
692
}
693
694
FLAC__bool FLAC__stream_encoder_set_last_metadata_is_last(const FLAC__StreamEncoder *encoder, FLAC__bool value)
695
{
696
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
697
return false;
698
encoder->protected_->last_metadata_is_last = value;
699
return true;
700
}
701
702
FLAC__bool FLAC__stream_encoder_set_write_callback(const FLAC__StreamEncoder *encoder, FLAC__StreamEncoderWriteStatus (*value)(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data))
703
{
704
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
705
return false;
706
encoder->private_->write_callback = value;
707
return true;
708
}
709
710
FLAC__bool FLAC__stream_encoder_set_metadata_callback(const FLAC__StreamEncoder *encoder, void (*value)(const FLAC__StreamEncoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data))
711
{
712
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
713
return false;
714
encoder->private_->metadata_callback = value;
715
return true;
716
}
717
718
FLAC__bool FLAC__stream_encoder_set_client_data(const FLAC__StreamEncoder *encoder, void *value)
719
{
720
if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
721
return false;
722
encoder->private_->client_data = value;
723
return true;
724
}
725
726
FLAC__StreamEncoderState FLAC__stream_encoder_get_state(const FLAC__StreamEncoder *encoder)
727
{
728
return encoder->protected_->state;
729
}
730
731
FLAC__bool FLAC__stream_encoder_get_streamable_subset(const FLAC__StreamEncoder *encoder)
732
{
733
return encoder->protected_->streamable_subset;
734
}
735
736
FLAC__bool FLAC__stream_encoder_get_do_mid_side_stereo(const FLAC__StreamEncoder *encoder)
737
{
738
return encoder->protected_->do_mid_side_stereo;
739
}
740
741
FLAC__bool FLAC__stream_encoder_get_loose_mid_side_stereo(const FLAC__StreamEncoder *encoder)
742
{
743
return encoder->protected_->loose_mid_side_stereo;
744
}
745
746
unsigned FLAC__stream_encoder_get_channels(const FLAC__StreamEncoder *encoder)
747
{
748
return encoder->protected_->channels;
749
}
750
751
unsigned FLAC__stream_encoder_get_bits_per_sample(const FLAC__StreamEncoder *encoder)
752
{
753
return encoder->protected_->bits_per_sample;
754
}
755
756
unsigned FLAC__stream_encoder_get_sample_rate(const FLAC__StreamEncoder *encoder)
757
{
758
return encoder->protected_->sample_rate;
759
}
760
761
unsigned FLAC__stream_encoder_get_blocksize(const FLAC__StreamEncoder *encoder)
762
{
763
return encoder->protected_->blocksize;
764
}
765
766
unsigned FLAC__stream_encoder_get_max_lpc_order(const FLAC__StreamEncoder *encoder)
767
{
768
return encoder->protected_->max_lpc_order;
769
}
770
771
unsigned FLAC__stream_encoder_get_qlp_coeff_precision(const FLAC__StreamEncoder *encoder)
772
{
773
return encoder->protected_->qlp_coeff_precision;
774
}
775
776
FLAC__bool FLAC__stream_encoder_get_do_qlp_coeff_prec_search(const FLAC__StreamEncoder *encoder)
777
{
778
return encoder->protected_->do_qlp_coeff_prec_search;
779
}
780
781
FLAC__bool FLAC__stream_encoder_get_do_escape_coding(const FLAC__StreamEncoder *encoder)
782
{
783
return encoder->protected_->do_escape_coding;
784
}
785
786
FLAC__bool FLAC__stream_encoder_get_do_exhaustive_model_search(const FLAC__StreamEncoder *encoder)
787
{
788
return encoder->protected_->do_exhaustive_model_search;
789
}
790
791
unsigned FLAC__stream_encoder_get_min_residual_partition_order(const FLAC__StreamEncoder *encoder)
792
{
793
return encoder->protected_->min_residual_partition_order;
794
}
795
796
unsigned FLAC__stream_encoder_get_max_residual_partition_order(const FLAC__StreamEncoder *encoder)
797
{
798
return encoder->protected_->max_residual_partition_order;
799
}
800
801
unsigned FLAC__stream_encoder_get_rice_parameter_search_dist(const FLAC__StreamEncoder *encoder)
802
{
803
return encoder->protected_->rice_parameter_search_dist;
804
}
805
806
FLAC__bool FLAC__stream_encoder_process(FLAC__StreamEncoder *encoder, const FLAC__int32 *buf[], unsigned samples)
807
{
808
unsigned i, j, channel;
809
FLAC__int32 x, mid, side;
810
const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize;
811
812
FLAC__ASSERT(encoder != 0);
813
FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
814
815
j = 0;
816
if(encoder->protected_->do_mid_side_stereo && channels == 2) {
817
do {
818
for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
819
x = mid = side = buf[0][j];
820
encoder->private_->integer_signal[0][i] = x;
821
encoder->private_->real_signal[0][i] = (FLAC__real)x;
822
x = buf[1][j];
823
encoder->private_->integer_signal[1][i] = x;
824
encoder->private_->real_signal[1][i] = (FLAC__real)x;
825
mid += x;
826
side -= x;
827
mid >>= 1; /* NOTE: not the same as 'mid = (buf[0][j] + buf[1][j]) / 2' ! */
828
encoder->private_->integer_signal_mid_side[1][i] = side;
829
encoder->private_->integer_signal_mid_side[0][i] = mid;
830
encoder->private_->real_signal_mid_side[1][i] = (FLAC__real)side;
831
encoder->private_->real_signal_mid_side[0][i] = (FLAC__real)mid;
832
encoder->private_->current_sample_number++;
833
}
834
if(i == blocksize) {
835
if(!stream_encoder_process_frame_(encoder, false)) /* false => not last frame */
836
return false;
837
}
838
} while(j < samples);
839
}
840
else {
841
do {
842
for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
843
for(channel = 0; channel < channels; channel++) {
844
x = buf[channel][j];
845
encoder->private_->integer_signal[channel][i] = x;
846
encoder->private_->real_signal[channel][i] = (FLAC__real)x;
847
}
848
encoder->private_->current_sample_number++;
849
}
850
if(i == blocksize) {
851
if(!stream_encoder_process_frame_(encoder, false)) /* false => not last frame */
852
return false;
853
}
854
} while(j < samples);
855
}
856
857
return true;
858
}
859
860
/* 'samples' is channel-wide samples, e.g. for 1 second at 44100Hz, 'samples' = 44100 regardless of the number of channels */
861
FLAC__bool FLAC__stream_encoder_process_interleaved(FLAC__StreamEncoder *encoder, const FLAC__int32 buf[], unsigned samples)
862
{
863
unsigned i, j, k, channel;
864
FLAC__int32 x, mid, side;
865
const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize;
866
867
FLAC__ASSERT(encoder != 0);
868
FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
869
870
j = k = 0;
871
if(encoder->protected_->do_mid_side_stereo && channels == 2) {
872
do {
873
for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
874
x = mid = side = buf[k++];
875
encoder->private_->integer_signal[0][i] = x;
876
encoder->private_->real_signal[0][i] = (FLAC__real)x;
877
x = buf[k++];
878
encoder->private_->integer_signal[1][i] = x;
879
encoder->private_->real_signal[1][i] = (FLAC__real)x;
880
mid += x;
881
side -= x;
882
mid >>= 1; /* NOTE: not the same as 'mid = (left + right) / 2' ! */
883
encoder->private_->integer_signal_mid_side[1][i] = side;
884
encoder->private_->integer_signal_mid_side[0][i] = mid;
885
encoder->private_->real_signal_mid_side[1][i] = (FLAC__real)side;
886
encoder->private_->real_signal_mid_side[0][i] = (FLAC__real)mid;
887
encoder->private_->current_sample_number++;
888
}
889
if(i == blocksize) {
890
if(!stream_encoder_process_frame_(encoder, false)) /* false => not last frame */
891
return false;
892
}
893
} while(j < samples);
894
}
895
else {
896
do {
897
for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
898
for(channel = 0; channel < channels; channel++) {
899
x = buf[k++];
900
encoder->private_->integer_signal[channel][i] = x;
901
encoder->private_->real_signal[channel][i] = (FLAC__real)x;
902
}
903
encoder->private_->current_sample_number++;
904
}
905
if(i == blocksize) {
906
if(!stream_encoder_process_frame_(encoder, false)) /* false => not last frame */
907
return false;
908
}
909
} while(j < samples);
910
}
911
912
return true;
913
}
914
915
FLAC__bool stream_encoder_resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_size)
916
{
917
FLAC__bool ok;
918
unsigned i, channel;
919
920
FLAC__ASSERT(new_size > 0);
921
FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
922
FLAC__ASSERT(encoder->private_->current_sample_number == 0);
923
924
/* To avoid excessive malloc'ing, we only grow the buffer; no shrinking. */
925
if(new_size <= encoder->private_->input_capacity)
926
return true;
927
928
ok = true;
929
930
/* WATCHOUT: FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx() requires that the input arrays (in our case the integer signals) have a buffer of up to 3 zeroes in front (at negative indices) for alignment purposes; we use 4 to keep the data well-aligned. */
931
932
for(i = 0; ok && i < encoder->protected_->channels; i++) {
933
ok = ok && FLAC__memory_alloc_aligned_int32_array(new_size+4, &encoder->private_->integer_signal_unaligned[i], &encoder->private_->integer_signal[i]);
934
ok = ok && FLAC__memory_alloc_aligned_real_array(new_size, &encoder->private_->real_signal_unaligned[i], &encoder->private_->real_signal[i]);
935
memset(encoder->private_->integer_signal[i], 0, sizeof(FLAC__int32)*4);
936
encoder->private_->integer_signal[i] += 4;
937
}
938
for(i = 0; ok && i < 2; i++) {
939
ok = ok && FLAC__memory_alloc_aligned_int32_array(new_size+4, &encoder->private_->integer_signal_mid_side_unaligned[i], &encoder->private_->integer_signal_mid_side[i]);
940
ok = ok && FLAC__memory_alloc_aligned_real_array(new_size, &encoder->private_->real_signal_mid_side_unaligned[i], &encoder->private_->real_signal_mid_side[i]);
941
memset(encoder->private_->integer_signal_mid_side[i], 0, sizeof(FLAC__int32)*4);
942
encoder->private_->integer_signal_mid_side[i] += 4;
943
}
944
for(channel = 0; ok && channel < encoder->protected_->channels; channel++) {
945
for(i = 0; ok && i < 2; i++) {
946
ok = ok && FLAC__memory_alloc_aligned_int32_array(new_size, &encoder->private_->residual_workspace_unaligned[channel][i], &encoder->private_->residual_workspace[channel][i]);
947
}
948
}
949
for(channel = 0; ok && channel < 2; channel++) {
950
for(i = 0; ok && i < 2; i++) {
951
ok = ok && FLAC__memory_alloc_aligned_int32_array(new_size, &encoder->private_->residual_workspace_mid_side_unaligned[channel][i], &encoder->private_->residual_workspace_mid_side[channel][i]);
952
}
953
}
954
ok = ok && FLAC__memory_alloc_aligned_uint32_array(new_size, &encoder->private_->abs_residual_unaligned, &encoder->private_->abs_residual);
955
if(encoder->private_->precompute_partition_sums || encoder->protected_->do_escape_coding) /* we require precompute_partition_sums if do_escape_coding because of their intertwined nature */
956
ok = ok && FLAC__memory_alloc_aligned_uint64_array(new_size * 2, &encoder->private_->abs_residual_partition_sums_unaligned, &encoder->private_->abs_residual_partition_sums);
957
if(encoder->protected_->do_escape_coding)
958
ok = ok && FLAC__memory_alloc_aligned_unsigned_array(new_size * 2, &encoder->private_->raw_bits_per_partition_unaligned, &encoder->private_->raw_bits_per_partition);
959
960
if(ok)
961
encoder->private_->input_capacity = new_size;
962
else
963
encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
964
965
return ok;
966
}
967
968
/***********************************************************************
969
*
970
* Private class methods
971
*
972
***********************************************************************/
973
974
FLAC__bool stream_encoder_process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame)
975
{
976
FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
977
978
/*
979
* Accumulate raw signal to the MD5 signature
980
*/
981
/* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
982
if(!FLAC__MD5Accumulate(&encoder->private_->md5context, encoder->private_->integer_signal, encoder->protected_->channels, encoder->protected_->blocksize, (encoder->protected_->bits_per_sample+7) / 8)) {
983
encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
984
return false;
985
}
986
987
/*
988
* Process the frame header and subframes into the frame bitbuffer
989
*/
990
if(!stream_encoder_process_subframes_(encoder, is_last_frame)) {
991
/* the above function sets the state for us in case of an error */
992
return false;
993
}
994
995
/*
996
* Zero-pad the frame to a byte_boundary
997
*/
998
if(!FLAC__bitbuffer_zero_pad_to_byte_boundary(&encoder->private_->frame)) {
999
encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1000
return false;
1001
}
1002
1003
/*
1004
* CRC-16 the whole thing
1005
*/
1006
FLAC__ASSERT(encoder->private_->frame.bits == 0); /* assert that we're byte-aligned */
1007
FLAC__ASSERT(encoder->private_->frame.total_consumed_bits == 0); /* assert that no reading of the buffer was done */
1008
FLAC__bitbuffer_write_raw_uint32(&encoder->private_->frame, FLAC__crc16(encoder->private_->frame.buffer, encoder->private_->frame.bytes), FLAC__FRAME_FOOTER_CRC_LEN);
1009
1010
/*
1011
* Write it
1012
*/
1013
if(encoder->private_->write_callback(encoder, encoder->private_->frame.buffer, encoder->private_->frame.bytes, encoder->protected_->blocksize, encoder->private_->current_frame_number, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_OK) {
1014
encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_WRITING;
1015
return false;
1016
}
1017
1018
/*
1019
* Get ready for the next frame
1020
*/
1021
encoder->private_->current_sample_number = 0;
1022
encoder->private_->current_frame_number++;
1023
encoder->private_->metadata.data.stream_info.total_samples += (FLAC__uint64)encoder->protected_->blocksize;
1024
encoder->private_->metadata.data.stream_info.min_framesize = min(encoder->private_->frame.bytes, encoder->private_->metadata.data.stream_info.min_framesize);
1025
encoder->private_->metadata.data.stream_info.max_framesize = max(encoder->private_->frame.bytes, encoder->private_->metadata.data.stream_info.max_framesize);
1026
1027
return true;
1028
}
1029
1030
FLAC__bool stream_encoder_process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame)
1031
{
1032
FLAC__FrameHeader frame_header;
1033
unsigned channel, min_partition_order = encoder->protected_->min_residual_partition_order, max_partition_order;
1034
FLAC__bool do_independent, do_mid_side, precompute_partition_sums;
1035
1036
/*
1037
* Calculate the min,max Rice partition orders
1038
*/
1039
if(is_last_frame) {
1040
max_partition_order = 0;
1041
}
1042
else {
1043
unsigned limit = 0, b = encoder->protected_->blocksize;
1044
while(!(b & 1)) {
1045
limit++;
1046
b >>= 1;
1047
}
1048
max_partition_order = min(encoder->protected_->max_residual_partition_order, limit);
1049
}
1050
min_partition_order = min(min_partition_order, max_partition_order);
1051
1052
precompute_partition_sums = encoder->private_->precompute_partition_sums && ((max_partition_order > min_partition_order) || encoder->protected_->do_escape_coding);
1053
1054
/*
1055
* Setup the frame
1056
*/
1057
if(!FLAC__bitbuffer_clear(&encoder->private_->frame)) {
1058
encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1059
return false;
1060
}
1061
frame_header.blocksize = encoder->protected_->blocksize;
1062
frame_header.sample_rate = encoder->protected_->sample_rate;
1063
frame_header.channels = encoder->protected_->channels;
1064
frame_header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT; /* the default unless the encoder determines otherwise */
1065
frame_header.bits_per_sample = encoder->protected_->bits_per_sample;
1066
frame_header.number_type = FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER;
1067
frame_header.number.frame_number = encoder->private_->current_frame_number;
1068
1069
/*
1070
* Figure out what channel assignments to try
1071
*/
1072
if(encoder->protected_->do_mid_side_stereo) {
1073
if(encoder->protected_->loose_mid_side_stereo) {
1074
if(encoder->private_->loose_mid_side_stereo_frame_count == 0) {
1075
do_independent = true;
1076
do_mid_side = true;
1077
}
1078
else {
1079
do_independent = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT);
1080
do_mid_side = !do_independent;
1081
}
1082
}
1083
else {
1084
do_independent = true;
1085
do_mid_side = true;
1086
}
1087
}
1088
else {
1089
do_independent = true;
1090
do_mid_side = false;
1091
}
1092
1093
FLAC__ASSERT(do_independent || do_mid_side);
1094
1095
/*
1096
* Check for wasted bits; set effective bps for each subframe
1097
*/
1098
if(do_independent) {
1099
unsigned w;
1100
for(channel = 0; channel < encoder->protected_->channels; channel++) {
1101
w = stream_encoder_get_wasted_bits_(encoder->private_->integer_signal[channel], encoder->protected_->blocksize);
1102
encoder->private_->subframe_workspace[channel][0].wasted_bits = encoder->private_->subframe_workspace[channel][1].wasted_bits = w;
1103
encoder->private_->subframe_bps[channel] = encoder->protected_->bits_per_sample - w;
1104
}
1105
}
1106
if(do_mid_side) {
1107
unsigned w;
1108
FLAC__ASSERT(encoder->protected_->channels == 2);
1109
for(channel = 0; channel < 2; channel++) {
1110
w = stream_encoder_get_wasted_bits_(encoder->private_->integer_signal_mid_side[channel], encoder->protected_->blocksize);
1111
encoder->private_->subframe_workspace_mid_side[channel][0].wasted_bits = encoder->private_->subframe_workspace_mid_side[channel][1].wasted_bits = w;
1112
encoder->private_->subframe_bps_mid_side[channel] = encoder->protected_->bits_per_sample - w + (channel==0? 0:1);
1113
}
1114
}
1115
1116
/*
1117
* First do a normal encoding pass of each independent channel
1118
*/
1119
if(do_independent) {
1120
for(channel = 0; channel < encoder->protected_->channels; channel++) {
1121
if(!stream_encoder_process_subframe_(encoder, min_partition_order, max_partition_order, precompute_partition_sums, false, &frame_header, encoder->private_->subframe_bps[channel], encoder->private_->integer_signal[channel], encoder->private_->real_signal[channel], encoder->private_->subframe_workspace_ptr[channel], encoder->private_->residual_workspace[channel], encoder->private_->best_subframe+channel, encoder->private_->best_subframe_bits+channel))
1122
return false;
1123
}
1124
}
1125
1126
/*
1127
* Now do mid and side channels if requested
1128
*/
1129
if(do_mid_side) {
1130
FLAC__ASSERT(encoder->protected_->channels == 2);
1131
1132
for(channel = 0; channel < 2; channel++) {
1133
if(!stream_encoder_process_subframe_(encoder, min_partition_order, max_partition_order, precompute_partition_sums, false, &frame_header, encoder->private_->subframe_bps_mid_side[channel], encoder->private_->integer_signal_mid_side[channel], encoder->private_->real_signal_mid_side[channel], encoder->private_->subframe_workspace_ptr_mid_side[channel], encoder->private_->residual_workspace_mid_side[channel], encoder->private_->best_subframe_mid_side+channel, encoder->private_->best_subframe_bits_mid_side+channel))
1134
return false;
1135
}
1136
}
1137
1138
/*
1139
* Compose the frame bitbuffer
1140
*/
1141
if(do_mid_side) {
1142
unsigned left_bps = 0, right_bps = 0; /* initialized only to prevent superfluous compiler warning */
1143
FLAC__Subframe *left_subframe = 0, *right_subframe = 0; /* initialized only to prevent superfluous compiler warning */
1144
FLAC__ChannelAssignment channel_assignment;
1145
1146
FLAC__ASSERT(encoder->protected_->channels == 2);
1147
1148
if(encoder->protected_->loose_mid_side_stereo && encoder->private_->loose_mid_side_stereo_frame_count > 0) {
1149
channel_assignment = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT? FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT : FLAC__CHANNEL_ASSIGNMENT_MID_SIDE);
1150
}
1151
else {
1152
unsigned bits[4]; /* WATCHOUT - indexed by FLAC__ChannelAssignment */
1153
unsigned min_bits;
1154
FLAC__ChannelAssignment ca;
1155
1156
FLAC__ASSERT(do_independent && do_mid_side);
1157
1158
/* We have to figure out which channel assignent results in the smallest frame */
1159
bits[FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT] = encoder->private_->best_subframe_bits [0] + encoder->private_->best_subframe_bits [1];
1160
bits[FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE ] = encoder->private_->best_subframe_bits [0] + encoder->private_->best_subframe_bits_mid_side[1];
1161
bits[FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE ] = encoder->private_->best_subframe_bits [1] + encoder->private_->best_subframe_bits_mid_side[1];
1162
bits[FLAC__CHANNEL_ASSIGNMENT_MID_SIDE ] = encoder->private_->best_subframe_bits_mid_side[0] + encoder->private_->best_subframe_bits_mid_side[1];
1163
1164
for(channel_assignment = 0, min_bits = bits[0], ca = 1; ca <= 3; ca++) {
1165
if(bits[ca] < min_bits) {
1166
min_bits = bits[ca];
1167
channel_assignment = ca;
1168
}
1169
}
1170
}
1171
1172
frame_header.channel_assignment = channel_assignment;
1173
1174
if(!FLAC__frame_add_header(&frame_header, encoder->protected_->streamable_subset, is_last_frame, &encoder->private_->frame)) {
1175
encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
1176
return false;
1177
}
1178
1179
switch(channel_assignment) {
1180
case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
1181
left_subframe = &encoder->private_->subframe_workspace [0][encoder->private_->best_subframe [0]];
1182
right_subframe = &encoder->private_->subframe_workspace [1][encoder->private_->best_subframe [1]];
1183
break;
1184
case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
1185
left_subframe = &encoder->private_->subframe_workspace [0][encoder->private_->best_subframe [0]];
1186
right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
1187
break;
1188
case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
1189
left_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
1190
right_subframe = &encoder->private_->subframe_workspace [1][encoder->private_->best_subframe [1]];
1191
break;
1192
case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
1193
left_subframe = &encoder->private_->subframe_workspace_mid_side[0][encoder->private_->best_subframe_mid_side[0]];
1194
right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
1195
break;
1196
default:
1197
FLAC__ASSERT(0);
1198
}
1199
1200
switch(channel_assignment) {
1201
case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
1202
left_bps = encoder->private_->subframe_bps [0];
1203
right_bps = encoder->private_->subframe_bps [1];
1204
break;
1205
case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
1206
left_bps = encoder->private_->subframe_bps [0];
1207
right_bps = encoder->private_->subframe_bps_mid_side[1];
1208
break;
1209
case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
1210
left_bps = encoder->private_->subframe_bps_mid_side[1];
1211
right_bps = encoder->private_->subframe_bps [1];
1212
break;
1213
case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
1214
left_bps = encoder->private_->subframe_bps_mid_side[0];
1215
right_bps = encoder->private_->subframe_bps_mid_side[1];
1216
break;
1217
default:
1218
FLAC__ASSERT(0);
1219
}
1220
1221
/* note that encoder_add_subframe_ sets the state for us in case of an error */
1222
if(!stream_encoder_add_subframe_(encoder, &frame_header, left_bps , left_subframe , &encoder->private_->frame))
1223
return false;
1224
if(!stream_encoder_add_subframe_(encoder, &frame_header, right_bps, right_subframe, &encoder->private_->frame))
1225
return false;
1226
}
1227
else {
1228
if(!FLAC__frame_add_header(&frame_header, encoder->protected_->streamable_subset, is_last_frame, &encoder->private_->frame)) {
1229
encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
1230
return false;
1231
}
1232
1233
for(channel = 0; channel < encoder->protected_->channels; channel++) {
1234
if(!stream_encoder_add_subframe_(encoder, &frame_header, encoder->private_->subframe_bps[channel], &encoder->private_->subframe_workspace[channel][encoder->private_->best_subframe[channel]], &encoder->private_->frame)) {
1235
/* the above function sets the state for us in case of an error */
1236
return false;
1237
}
1238
}
1239
}
1240
1241
if(encoder->protected_->loose_mid_side_stereo) {
1242
encoder->private_->loose_mid_side_stereo_frame_count++;
1243
if(encoder->private_->loose_mid_side_stereo_frame_count >= encoder->private_->loose_mid_side_stereo_frames)
1244
encoder->private_->loose_mid_side_stereo_frame_count = 0;
1245
}
1246
1247
encoder->private_->last_channel_assignment = frame_header.channel_assignment;
1248
1249
return true;
1250
}
1251
1252
FLAC__bool stream_encoder_process_subframe_(FLAC__StreamEncoder *encoder, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool verbatim_only, const FLAC__FrameHeader *frame_header, unsigned subframe_bps, const FLAC__int32 integer_signal[], const FLAC__real real_signal[], FLAC__Subframe *subframe[2], FLAC__int32 *residual[2], unsigned *best_subframe, unsigned *best_bits)
1253
{
1254
FLAC__real fixed_residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1];
1255
FLAC__real lpc_residual_bits_per_sample;
1256
FLAC__real autoc[FLAC__MAX_LPC_ORDER+1]; /* WATCHOUT: the size is important even though encoder->protected_->max_lpc_order might be less; some asm routines need all the space */
1257
FLAC__real lpc_error[FLAC__MAX_LPC_ORDER];
1258
unsigned min_lpc_order, max_lpc_order, lpc_order;
1259
unsigned min_fixed_order, max_fixed_order, guess_fixed_order, fixed_order;
1260
unsigned min_qlp_coeff_precision, max_qlp_coeff_precision, qlp_coeff_precision;
1261
unsigned rice_parameter;
1262
unsigned _candidate_bits, _best_bits;
1263
unsigned _best_subframe;
1264
1265
/* verbatim subframe is the baseline against which we measure other compressed subframes */
1266
_best_subframe = 0;
1267
_best_bits = stream_encoder_evaluate_verbatim_subframe_(integer_signal, frame_header->blocksize, subframe_bps, subframe[_best_subframe]);
1268
1269
if(!verbatim_only && frame_header->blocksize >= FLAC__MAX_FIXED_ORDER) {
1270
/* check for constant subframe */
1271
guess_fixed_order = encoder->private_->local_fixed_compute_best_predictor(integer_signal+FLAC__MAX_FIXED_ORDER, frame_header->blocksize-FLAC__MAX_FIXED_ORDER, fixed_residual_bits_per_sample);
1272
if(fixed_residual_bits_per_sample[1] == 0.0) {
1273
/* the above means integer_signal+FLAC__MAX_FIXED_ORDER is constant, now we just have to check the warmup samples */
1274
unsigned i, signal_is_constant = true;
1275
for(i = 1; i <= FLAC__MAX_FIXED_ORDER; i++) {
1276
if(integer_signal[0] != integer_signal[i]) {
1277
signal_is_constant = false;
1278
break;
1279
}
1280
}
1281
if(signal_is_constant) {
1282
_candidate_bits = stream_encoder_evaluate_constant_subframe_(integer_signal[0], subframe_bps, subframe[!_best_subframe]);
1283
if(_candidate_bits < _best_bits) {
1284
_best_subframe = !_best_subframe;
1285
_best_bits = _candidate_bits;
1286
}
1287
}
1288
}
1289
else {
1290
/* encode fixed */
1291
if(encoder->protected_->do_exhaustive_model_search) {
1292
min_fixed_order = 0;
1293
max_fixed_order = FLAC__MAX_FIXED_ORDER;
1294
}
1295
else {
1296
min_fixed_order = max_fixed_order = guess_fixed_order;
1297
}
1298
for(fixed_order = min_fixed_order; fixed_order <= max_fixed_order; fixed_order++) {
1299
if(fixed_residual_bits_per_sample[fixed_order] >= (FLAC__real)subframe_bps)
1300
continue; /* don't even try */
1301
rice_parameter = (fixed_residual_bits_per_sample[fixed_order] > 0.0)? (unsigned)(fixed_residual_bits_per_sample[fixed_order]+0.5) : 0; /* 0.5 is for rounding */
1302
#ifndef FLAC__SYMMETRIC_RICE
1303
rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */
1304
#endif
1305
if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1306
#ifdef DEBUG_VERBOSE
1307
fprintf(stderr, "clipping rice_parameter (%u -> %u) @0\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1308
#endif
1309
rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1310
}
1311
_candidate_bits = stream_encoder_evaluate_fixed_subframe_(encoder, integer_signal, residual[!_best_subframe], encoder->private_->abs_residual, encoder->private_->abs_residual_partition_sums, encoder->private_->raw_bits_per_partition, frame_header->blocksize, subframe_bps, fixed_order, rice_parameter, min_partition_order, max_partition_order, precompute_partition_sums, encoder->protected_->do_escape_coding, encoder->protected_->rice_parameter_search_dist, subframe[!_best_subframe]);
1312
if(_candidate_bits < _best_bits) {
1313
_best_subframe = !_best_subframe;
1314
_best_bits = _candidate_bits;
1315
}
1316
}
1317
1318
/* encode lpc */
1319
if(encoder->protected_->max_lpc_order > 0) {
1320
if(encoder->protected_->max_lpc_order >= frame_header->blocksize)
1321
max_lpc_order = frame_header->blocksize-1;
1322
else
1323
max_lpc_order = encoder->protected_->max_lpc_order;
1324
if(max_lpc_order > 0) {
1325
encoder->private_->local_lpc_compute_autocorrelation(real_signal, frame_header->blocksize, max_lpc_order+1, autoc);
1326
/* if autoc[0] == 0.0, the signal is constant and we usually won't get here, but it can happen */
1327
if(autoc[0] != 0.0) {
1328
FLAC__lpc_compute_lp_coefficients(autoc, max_lpc_order, encoder->private_->lp_coeff, lpc_error);
1329
if(encoder->protected_->do_exhaustive_model_search) {
1330
min_lpc_order = 1;
1331
}
1332
else {
1333
unsigned guess_lpc_order = FLAC__lpc_compute_best_order(lpc_error, max_lpc_order, frame_header->blocksize, subframe_bps);
1334
min_lpc_order = max_lpc_order = guess_lpc_order;
1335
}
1336
if(encoder->protected_->do_qlp_coeff_prec_search) {
1337
min_qlp_coeff_precision = FLAC__MIN_QLP_COEFF_PRECISION;
1338
max_qlp_coeff_precision = min(8*sizeof(FLAC__int32) - subframe_bps - 1 - 2, (1u<<FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN)-1); /* -2 to keep things 32-bit safe */
1339
}
1340
else {
1341
min_qlp_coeff_precision = max_qlp_coeff_precision = encoder->protected_->qlp_coeff_precision;
1342
}
1343
for(lpc_order = min_lpc_order; lpc_order <= max_lpc_order; lpc_order++) {
1344
lpc_residual_bits_per_sample = FLAC__lpc_compute_expected_bits_per_residual_sample(lpc_error[lpc_order-1], frame_header->blocksize-lpc_order);
1345
if(lpc_residual_bits_per_sample >= (FLAC__real)subframe_bps)
1346
continue; /* don't even try */
1347
rice_parameter = (lpc_residual_bits_per_sample > 0.0)? (unsigned)(lpc_residual_bits_per_sample+0.5) : 0; /* 0.5 is for rounding */
1348
#ifndef FLAC__SYMMETRIC_RICE
1349
rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */
1350
#endif
1351
if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1352
#ifdef DEBUG_VERBOSE
1353
fprintf(stderr, "clipping rice_parameter (%u -> %u) @1\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1354
#endif
1355
rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1356
}
1357
for(qlp_coeff_precision = min_qlp_coeff_precision; qlp_coeff_precision <= max_qlp_coeff_precision; qlp_coeff_precision++) {
1358
_candidate_bits = stream_encoder_evaluate_lpc_subframe_(encoder, integer_signal, residual[!_best_subframe], encoder->private_->abs_residual, encoder->private_->abs_residual_partition_sums, encoder->private_->raw_bits_per_partition, encoder->private_->lp_coeff[lpc_order-1], frame_header->blocksize, subframe_bps, lpc_order, qlp_coeff_precision, rice_parameter, min_partition_order, max_partition_order, precompute_partition_sums, encoder->protected_->do_escape_coding, encoder->protected_->rice_parameter_search_dist, subframe[!_best_subframe]);
1359
if(_candidate_bits > 0) { /* if == 0, there was a problem quantizing the lpcoeffs */
1360
if(_candidate_bits < _best_bits) {
1361
_best_subframe = !_best_subframe;
1362
_best_bits = _candidate_bits;
1363
}
1364
}
1365
}
1366
}
1367
}
1368
}
1369
}
1370
}
1371
}
1372
1373
*best_subframe = _best_subframe;
1374
*best_bits = _best_bits;
1375
1376
return true;
1377
}
1378
1379
FLAC__bool stream_encoder_add_subframe_(FLAC__StreamEncoder *encoder, const FLAC__FrameHeader *frame_header, unsigned subframe_bps, const FLAC__Subframe *subframe, FLAC__BitBuffer *frame)
1380
{
1381
switch(subframe->type) {
1382
case FLAC__SUBFRAME_TYPE_CONSTANT:
1383
if(!FLAC__subframe_add_constant(&(subframe->data.constant), subframe_bps, subframe->wasted_bits, frame)) {
1384
encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING;
1385
return false;
1386
}
1387
break;
1388
case FLAC__SUBFRAME_TYPE_FIXED:
1389
if(!FLAC__subframe_add_fixed(&(subframe->data.fixed), frame_header->blocksize - subframe->data.fixed.order, subframe_bps, subframe->wasted_bits, frame)) {
1390
encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING;
1391
return false;
1392
}
1393
break;
1394
case FLAC__SUBFRAME_TYPE_LPC:
1395
if(!FLAC__subframe_add_lpc(&(subframe->data.lpc), frame_header->blocksize - subframe->data.lpc.order, subframe_bps, subframe->wasted_bits, frame)) {
1396
encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING;
1397
return false;
1398
}
1399
break;
1400
case FLAC__SUBFRAME_TYPE_VERBATIM:
1401
if(!FLAC__subframe_add_verbatim(&(subframe->data.verbatim), frame_header->blocksize, subframe_bps, subframe->wasted_bits, frame)) {
1402
encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING;
1403
return false;
1404
}
1405
break;
1406
default:
1407
FLAC__ASSERT(0);
1408
}
1409
1410
return true;
1411
}
1412
1413
unsigned stream_encoder_evaluate_constant_subframe_(const FLAC__int32 signal, unsigned subframe_bps, FLAC__Subframe *subframe)
1414
{
1415
subframe->type = FLAC__SUBFRAME_TYPE_CONSTANT;
1416
subframe->data.constant.value = signal;
1417
1418
return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + subframe_bps;
1419
}
1420
1421
unsigned stream_encoder_evaluate_fixed_subframe_(FLAC__StreamEncoder *encoder, const FLAC__int32 signal[], FLAC__int32 residual[], FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned raw_bits_per_partition[], unsigned blocksize, unsigned subframe_bps, unsigned order, unsigned rice_parameter, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool do_escape_coding, unsigned rice_parameter_search_dist, FLAC__Subframe *subframe)
1422
{
1423
unsigned i, residual_bits;
1424
const unsigned residual_samples = blocksize - order;
1425
1426
FLAC__fixed_compute_residual(signal+order, residual_samples, order, residual);
1427
1428
subframe->type = FLAC__SUBFRAME_TYPE_FIXED;
1429
1430
subframe->data.fixed.entropy_coding_method.type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE;
1431
subframe->data.fixed.residual = residual;
1432
1433
residual_bits = stream_encoder_find_best_partition_order_(encoder->private_, residual, abs_residual, abs_residual_partition_sums, raw_bits_per_partition, residual_samples, order, rice_parameter, min_partition_order, max_partition_order, precompute_partition_sums, do_escape_coding, rice_parameter_search_dist, &subframe->data.fixed.entropy_coding_method.data.partitioned_rice.order, subframe->data.fixed.entropy_coding_method.data.partitioned_rice.parameters, subframe->data.fixed.entropy_coding_method.data.partitioned_rice.raw_bits);
1434
1435
subframe->data.fixed.order = order;
1436
for(i = 0; i < order; i++)
1437
subframe->data.fixed.warmup[i] = signal[i];
1438
1439
return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + (order * subframe_bps) + residual_bits;
1440
}
1441
1442
unsigned stream_encoder_evaluate_lpc_subframe_(FLAC__StreamEncoder *encoder, const FLAC__int32 signal[], FLAC__int32 residual[], FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned raw_bits_per_partition[], const FLAC__real lp_coeff[], unsigned blocksize, unsigned subframe_bps, unsigned order, unsigned qlp_coeff_precision, unsigned rice_parameter, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool do_escape_coding, unsigned rice_parameter_search_dist, FLAC__Subframe *subframe)
1443
{
1444
FLAC__int32 qlp_coeff[FLAC__MAX_LPC_ORDER];
1445
unsigned i, residual_bits;
1446
int quantization, ret;
1447
const unsigned residual_samples = blocksize - order;
1448
1449
ret = FLAC__lpc_quantize_coefficients(lp_coeff, order, qlp_coeff_precision, subframe_bps, qlp_coeff, &quantization);
1450
if(ret != 0)
1451
return 0; /* this is a hack to indicate to the caller that we can't do lp at this order on this subframe */
1452
1453
if(subframe_bps <= 16 && qlp_coeff_precision <= 16)
1454
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit(signal+order, residual_samples, qlp_coeff, order, quantization, residual);
1455
else
1456
encoder->private_->local_lpc_compute_residual_from_qlp_coefficients(signal+order, residual_samples, qlp_coeff, order, quantization, residual);
1457
1458
subframe->type = FLAC__SUBFRAME_TYPE_LPC;
1459
1460
subframe->data.lpc.entropy_coding_method.type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE;
1461
subframe->data.lpc.residual = residual;
1462
1463
residual_bits = stream_encoder_find_best_partition_order_(encoder->private_, residual, abs_residual, abs_residual_partition_sums, raw_bits_per_partition, residual_samples, order, rice_parameter, min_partition_order, max_partition_order, precompute_partition_sums, do_escape_coding, rice_parameter_search_dist, &subframe->data.lpc.entropy_coding_method.data.partitioned_rice.order, subframe->data.lpc.entropy_coding_method.data.partitioned_rice.parameters, subframe->data.lpc.entropy_coding_method.data.partitioned_rice.raw_bits);
1464
1465
subframe->data.lpc.order = order;
1466
subframe->data.lpc.qlp_coeff_precision = qlp_coeff_precision;
1467
subframe->data.lpc.quantization_level = quantization;
1468
memcpy(subframe->data.lpc.qlp_coeff, qlp_coeff, sizeof(FLAC__int32)*FLAC__MAX_LPC_ORDER);
1469
for(i = 0; i < order; i++)
1470
subframe->data.lpc.warmup[i] = signal[i];
1471
1472
return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN + FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN + (order * (qlp_coeff_precision + subframe_bps)) + residual_bits;
1473
}
1474
1475
unsigned stream_encoder_evaluate_verbatim_subframe_(const FLAC__int32 signal[], unsigned blocksize, unsigned subframe_bps, FLAC__Subframe *subframe)
1476
{
1477
subframe->type = FLAC__SUBFRAME_TYPE_VERBATIM;
1478
1479
subframe->data.verbatim.data = signal;
1480
1481
return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + (blocksize * subframe_bps);
1482
}
1483
1484
unsigned stream_encoder_find_best_partition_order_(FLAC__StreamEncoderPrivate *private_, const FLAC__int32 residual[], FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned raw_bits_per_partition[], unsigned residual_samples, unsigned predictor_order, unsigned rice_parameter, unsigned min_partition_order, unsigned max_partition_order, FLAC__bool precompute_partition_sums, FLAC__bool do_escape_coding, unsigned rice_parameter_search_dist, unsigned *best_partition_order, unsigned best_parameters[], unsigned best_raw_bits[])
1485
{
1486
FLAC__int32 r;
1487
unsigned residual_bits, best_residual_bits = 0;
1488
unsigned residual_sample;
1489
unsigned best_parameters_index = 0;
1490
const unsigned blocksize = residual_samples + predictor_order;
1491
1492
/* compute abs(residual) for use later */
1493
for(residual_sample = 0; residual_sample < residual_samples; residual_sample++) {
1494
r = residual[residual_sample];
1495
abs_residual[residual_sample] = (FLAC__uint32)(r<0? -r : r);
1496
}
1497
1498
while(max_partition_order > 0 && blocksize >> max_partition_order <= predictor_order)
1499
max_partition_order--;
1500
FLAC__ASSERT(blocksize >> max_partition_order > predictor_order);
1501
min_partition_order = min(min_partition_order, max_partition_order);
1502
1503
if(precompute_partition_sums) {
1504
int partition_order;
1505
unsigned sum;
1506
1507
stream_encoder_precompute_partition_info_sums_(abs_residual, abs_residual_partition_sums, residual_samples, predictor_order, min_partition_order, max_partition_order);
1508
1509
if(do_escape_coding)
1510
stream_encoder_precompute_partition_info_escapes_(residual, raw_bits_per_partition, residual_samples, predictor_order, min_partition_order, max_partition_order);
1511
1512
for(partition_order = (int)max_partition_order, sum = 0; partition_order >= (int)min_partition_order; partition_order--) {
1513
#ifdef DONT_ESTIMATE_RICE_BITS
1514
if(!stream_encoder_set_partitioned_rice_with_precompute_(residual, abs_residual_partition_sums+sum, raw_bits_per_partition+sum, residual_samples, predictor_order, rice_parameter, rice_parameter_search_dist, (unsigned)partition_order, do_escape_coding, private_->parameters[!best_parameters_index], private_->raw_bits[!best_parameters_index], &residual_bits))
1515
#else
1516
if(!stream_encoder_set_partitioned_rice_with_precompute_(abs_residual, abs_residual_partition_sums+sum, raw_bits_per_partition+sum, residual_samples, predictor_order, rice_parameter, rice_parameter_search_dist, (unsigned)partition_order, do_escape_coding, private_->parameters[!best_parameters_index], private_->raw_bits[!best_parameters_index], &residual_bits))
1517
#endif
1518
{
1519
FLAC__ASSERT(best_residual_bits != 0);
1520
break;
1521
}
1522
sum += 1u << partition_order;
1523
if(best_residual_bits == 0 || residual_bits < best_residual_bits) {
1524
best_residual_bits = residual_bits;
1525
*best_partition_order = partition_order;
1526
best_parameters_index = !best_parameters_index;
1527
}
1528
}
1529
}
1530
else {
1531
unsigned partition_order;
1532
for(partition_order = min_partition_order; partition_order <= max_partition_order; partition_order++) {
1533
#ifdef DONT_ESTIMATE_RICE_BITS
1534
if(!stream_encoder_set_partitioned_rice_(abs_residual, residual, residual_samples, predictor_order, rice_parameter, rice_parameter_search_dist, partition_order, private_->parameters[!best_parameters_index], &residual_bits))
1535
#else
1536
if(!stream_encoder_set_partitioned_rice_(abs_residual, residual_samples, predictor_order, rice_parameter, rice_parameter_search_dist, partition_order, private_->parameters[!best_parameters_index], &residual_bits))
1537
#endif
1538
{
1539
FLAC__ASSERT(best_residual_bits != 0);
1540
break;
1541
}
1542
if(best_residual_bits == 0 || residual_bits < best_residual_bits) {
1543
best_residual_bits = residual_bits;
1544
*best_partition_order = partition_order;
1545
best_parameters_index = !best_parameters_index;
1546
}
1547
}
1548
}
1549
1550
memcpy(best_parameters, private_->parameters[best_parameters_index], sizeof(unsigned)*(1<<(*best_partition_order)));
1551
memcpy(best_raw_bits, private_->raw_bits[best_parameters_index], sizeof(unsigned)*(1<<(*best_partition_order)));
1552
1553
return best_residual_bits;
1554
}
1555
1556
void stream_encoder_precompute_partition_info_sums_(const FLAC__uint32 abs_residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned residual_samples, unsigned predictor_order, unsigned min_partition_order, unsigned max_partition_order)
1557
{
1558
int partition_order;
1559
unsigned from_partition, to_partition = 0;
1560
const unsigned blocksize = residual_samples + predictor_order;
1561
1562
/* first do max_partition_order */
1563
for(partition_order = (int)max_partition_order; partition_order >= 0; partition_order--) {
1564
FLAC__uint64 abs_residual_partition_sum;
1565
FLAC__uint32 abs_r;
1566
unsigned partition, partition_sample, partition_samples, residual_sample;
1567
const unsigned partitions = 1u << partition_order;
1568
const unsigned default_partition_samples = blocksize >> partition_order;
1569
1570
FLAC__ASSERT(default_partition_samples > predictor_order);
1571
1572
for(partition = residual_sample = 0; partition < partitions; partition++) {
1573
partition_samples = default_partition_samples;
1574
if(partition == 0)
1575
partition_samples -= predictor_order;
1576
abs_residual_partition_sum = 0;
1577
for(partition_sample = 0; partition_sample < partition_samples; partition_sample++) {
1578
abs_r = abs_residual[residual_sample];
1579
abs_residual_partition_sum += abs_r;
1580
residual_sample++;
1581
}
1582
abs_residual_partition_sums[partition] = abs_residual_partition_sum;
1583
}
1584
to_partition = partitions;
1585
break;
1586
}
1587
1588
/* now merge partitions for lower orders */
1589
for(from_partition = 0, --partition_order; partition_order >= (int)min_partition_order; partition_order--) {
1590
FLAC__uint64 s;
1591
unsigned i;
1592
const unsigned partitions = 1u << partition_order;
1593
for(i = 0; i < partitions; i++) {
1594
s = abs_residual_partition_sums[from_partition];
1595
from_partition++;
1596
abs_residual_partition_sums[to_partition] = s + abs_residual_partition_sums[from_partition];
1597
from_partition++;
1598
to_partition++;
1599
}
1600
}
1601
}
1602
1603
void stream_encoder_precompute_partition_info_escapes_(const FLAC__int32 residual[], unsigned raw_bits_per_partition[], unsigned residual_samples, unsigned predictor_order, unsigned min_partition_order, unsigned max_partition_order)
1604
{
1605
int partition_order;
1606
unsigned from_partition, to_partition = 0;
1607
const unsigned blocksize = residual_samples + predictor_order;
1608
1609
/* first do max_partition_order */
1610
for(partition_order = (int)max_partition_order; partition_order >= 0; partition_order--) {
1611
FLAC__int32 r, residual_partition_min, residual_partition_max;
1612
unsigned silog2_min, silog2_max;
1613
unsigned partition, partition_sample, partition_samples, residual_sample;
1614
const unsigned partitions = 1u << partition_order;
1615
const unsigned default_partition_samples = blocksize >> partition_order;
1616
1617
FLAC__ASSERT(default_partition_samples > predictor_order);
1618
1619
for(partition = residual_sample = 0; partition < partitions; partition++) {
1620
partition_samples = default_partition_samples;
1621
if(partition == 0)
1622
partition_samples -= predictor_order;
1623
residual_partition_min = residual_partition_max = 0;
1624
for(partition_sample = 0; partition_sample < partition_samples; partition_sample++) {
1625
r = residual[residual_sample];
1626
if(r < residual_partition_min)
1627
residual_partition_min = r;
1628
else if(r > residual_partition_max)
1629
residual_partition_max = r;
1630
residual_sample++;
1631
}
1632
silog2_min = FLAC__bitmath_silog2(residual_partition_min);
1633
silog2_max = FLAC__bitmath_silog2(residual_partition_max);
1634
raw_bits_per_partition[partition] = max(silog2_min, silog2_max);
1635
}
1636
to_partition = partitions;
1637
break;
1638
}
1639
1640
/* now merge partitions for lower orders */
1641
for(from_partition = 0, --partition_order; partition_order >= (int)min_partition_order; partition_order--) {
1642
unsigned m;
1643
unsigned i;
1644
const unsigned partitions = 1u << partition_order;
1645
for(i = 0; i < partitions; i++) {
1646
m = raw_bits_per_partition[from_partition];
1647
from_partition++;
1648
raw_bits_per_partition[to_partition] = max(m, raw_bits_per_partition[from_partition]);
1649
from_partition++;
1650
to_partition++;
1651
}
1652
}
1653
}
1654
1655
#ifdef VARIABLE_RICE_BITS
1656
#undef VARIABLE_RICE_BITS
1657
#endif
1658
#ifndef DONT_ESTIMATE_RICE_BITS
1659
#define VARIABLE_RICE_BITS(value, parameter) ((value) >> (parameter))
1660
#endif
1661
1662
#ifdef DONT_ESTIMATE_RICE_BITS
1663
FLAC__bool stream_encoder_set_partitioned_rice_(const FLAC__uint32 abs_residual[], const FLAC__int32 residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, unsigned parameters[], unsigned *bits)
1664
#else
1665
FLAC__bool stream_encoder_set_partitioned_rice_(const FLAC__uint32 abs_residual[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, unsigned parameters[], unsigned *bits)
1666
#endif
1667
{
1668
unsigned rice_parameter, partition_bits;
1669
#ifndef NO_RICE_SEARCH
1670
unsigned best_partition_bits;
1671
unsigned min_rice_parameter, max_rice_parameter, best_rice_parameter = 0;
1672
#endif
1673
unsigned bits_ = FLAC__ENTROPY_CODING_METHOD_TYPE_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN;
1674
1675
FLAC__ASSERT(suggested_rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER);
1676
1677
if(partition_order == 0) {
1678
unsigned i;
1679
1680
#ifndef NO_RICE_SEARCH
1681
if(rice_parameter_search_dist) {
1682
if(suggested_rice_parameter < rice_parameter_search_dist)
1683
min_rice_parameter = 0;
1684
else
1685
min_rice_parameter = suggested_rice_parameter - rice_parameter_search_dist;
1686
max_rice_parameter = suggested_rice_parameter + rice_parameter_search_dist;
1687
if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1688
#ifdef DEBUG_VERBOSE
1689
fprintf(stderr, "clipping rice_parameter (%u -> %u) @2\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1690
#endif
1691
max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1692
}
1693
}
1694
else
1695
min_rice_parameter = max_rice_parameter = suggested_rice_parameter;
1696
1697
best_partition_bits = 0xffffffff;
1698
for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
1699
#endif
1700
#ifdef VARIABLE_RICE_BITS
1701
#ifdef FLAC__SYMMETRIC_RICE
1702
partition_bits = (2+rice_parameter) * residual_samples;
1703
#else
1704
const unsigned rice_parameter_estimate = rice_parameter-1;
1705
partition_bits = (1+rice_parameter) * residual_samples;
1706
#endif
1707
#else
1708
partition_bits = 0;
1709
#endif
1710
partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
1711
for(i = 0; i < residual_samples; i++) {
1712
#ifdef VARIABLE_RICE_BITS
1713
#ifdef FLAC__SYMMETRIC_RICE
1714
partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter);
1715
#else
1716
partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter_estimate);
1717
#endif
1718
#else
1719
partition_bits += FLAC__bitbuffer_rice_bits(residual[i], rice_parameter); /* NOTE: we will need to pass in residual[] in addition to abs_residual[] */
1720
#endif
1721
}
1722
#ifndef NO_RICE_SEARCH
1723
if(partition_bits < best_partition_bits) {
1724
best_rice_parameter = rice_parameter;
1725
best_partition_bits = partition_bits;
1726
}
1727
}
1728
#endif
1729
parameters[0] = best_rice_parameter;
1730
bits_ += best_partition_bits;
1731
}
1732
else {
1733
unsigned partition, residual_sample, save_residual_sample, partition_sample;
1734
unsigned partition_samples;
1735
FLAC__uint64 mean, k;
1736
const unsigned partitions = 1u << partition_order;
1737
for(partition = residual_sample = 0; partition < partitions; partition++) {
1738
partition_samples = (residual_samples+predictor_order) >> partition_order;
1739
if(partition == 0) {
1740
if(partition_samples <= predictor_order)
1741
return false;
1742
else
1743
partition_samples -= predictor_order;
1744
}
1745
mean = 0;
1746
save_residual_sample = residual_sample;
1747
for(partition_sample = 0; partition_sample < partition_samples; residual_sample++, partition_sample++)
1748
mean += abs_residual[residual_sample];
1749
residual_sample = save_residual_sample;
1750
#ifdef FLAC__SYMMETRIC_RICE
1751
mean += partition_samples >> 1; /* for rounding effect */
1752
mean /= partition_samples;
1753
1754
/* calc rice_parameter = floor(log2(mean)) */
1755
rice_parameter = 0;
1756
mean>>=1;
1757
while(mean) {
1758
rice_parameter++;
1759
mean >>= 1;
1760
}
1761
#else
1762
/* calc rice_parameter ala LOCO-I */
1763
for(rice_parameter = 0, k = partition_samples; k < mean; rice_parameter++, k <<= 1)
1764
;
1765
#endif
1766
if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1767
#ifdef DEBUG_VERBOSE
1768
fprintf(stderr, "clipping rice_parameter (%u -> %u) @3\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1769
#endif
1770
rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1771
}
1772
1773
#ifndef NO_RICE_SEARCH
1774
if(rice_parameter_search_dist) {
1775
if(rice_parameter < rice_parameter_search_dist)
1776
min_rice_parameter = 0;
1777
else
1778
min_rice_parameter = rice_parameter - rice_parameter_search_dist;
1779
max_rice_parameter = rice_parameter + rice_parameter_search_dist;
1780
if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1781
#ifdef DEBUG_VERBOSE
1782
fprintf(stderr, "clipping rice_parameter (%u -> %u) @4\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1783
#endif
1784
max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1785
}
1786
}
1787
else
1788
min_rice_parameter = max_rice_parameter = rice_parameter;
1789
1790
best_partition_bits = 0xffffffff;
1791
for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
1792
#endif
1793
#ifdef VARIABLE_RICE_BITS
1794
#ifdef FLAC__SYMMETRIC_RICE
1795
partition_bits = (2+rice_parameter) * partition_samples;
1796
#else
1797
const unsigned rice_parameter_estimate = rice_parameter-1;
1798
partition_bits = (1+rice_parameter) * partition_samples;
1799
#endif
1800
#else
1801
partition_bits = 0;
1802
#endif
1803
partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
1804
save_residual_sample = residual_sample;
1805
for(partition_sample = 0; partition_sample < partition_samples; residual_sample++, partition_sample++) {
1806
#ifdef VARIABLE_RICE_BITS
1807
#ifdef FLAC__SYMMETRIC_RICE
1808
partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter);
1809
#else
1810
partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter_estimate);
1811
#endif
1812
#else
1813
partition_bits += FLAC__bitbuffer_rice_bits(residual[residual_sample], rice_parameter); /* NOTE: we will need to pass in residual[] in addition to abs_residual[] */
1814
#endif
1815
}
1816
#ifndef NO_RICE_SEARCH
1817
if(rice_parameter != max_rice_parameter)
1818
residual_sample = save_residual_sample;
1819
if(partition_bits < best_partition_bits) {
1820
best_rice_parameter = rice_parameter;
1821
best_partition_bits = partition_bits;
1822
}
1823
}
1824
#endif
1825
parameters[partition] = best_rice_parameter;
1826
bits_ += best_partition_bits;
1827
}
1828
}
1829
1830
*bits = bits_;
1831
return true;
1832
}
1833
1834
#ifdef DONT_ESTIMATE_RICE_BITS
1835
FLAC__bool stream_encoder_set_partitioned_rice_with_precompute_(const FLAC__int32 residual[], const FLAC__uint64 abs_residual_partition_sums[], const unsigned raw_bits_per_partition[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, const FLAC__bool search_for_escapes, unsigned parameters[], unsigned raw_bits[], unsigned *bits)
1836
#else
1837
FLAC__bool stream_encoder_set_partitioned_rice_with_precompute_(const FLAC__uint32 abs_residual[], const FLAC__uint64 abs_residual_partition_sums[], const unsigned raw_bits_per_partition[], const unsigned residual_samples, const unsigned predictor_order, const unsigned suggested_rice_parameter, const unsigned rice_parameter_search_dist, const unsigned partition_order, const FLAC__bool search_for_escapes, unsigned parameters[], unsigned raw_bits[], unsigned *bits)
1838
#endif
1839
{
1840
unsigned rice_parameter, partition_bits;
1841
#ifndef NO_RICE_SEARCH
1842
unsigned best_partition_bits;
1843
unsigned min_rice_parameter, max_rice_parameter, best_rice_parameter = 0;
1844
#endif
1845
unsigned flat_bits;
1846
unsigned bits_ = FLAC__ENTROPY_CODING_METHOD_TYPE_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN;
1847
1848
FLAC__ASSERT(suggested_rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER);
1849
1850
if(partition_order == 0) {
1851
unsigned i;
1852
1853
#ifndef NO_RICE_SEARCH
1854
if(rice_parameter_search_dist) {
1855
if(suggested_rice_parameter < rice_parameter_search_dist)
1856
min_rice_parameter = 0;
1857
else
1858
min_rice_parameter = suggested_rice_parameter - rice_parameter_search_dist;
1859
max_rice_parameter = suggested_rice_parameter + rice_parameter_search_dist;
1860
if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1861
#ifdef DEBUG_VERBOSE
1862
fprintf(stderr, "clipping rice_parameter (%u -> %u) @5\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1863
#endif
1864
max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1865
}
1866
}
1867
else
1868
min_rice_parameter = max_rice_parameter = suggested_rice_parameter;
1869
1870
best_partition_bits = 0xffffffff;
1871
for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
1872
#endif
1873
#ifdef VARIABLE_RICE_BITS
1874
#ifdef FLAC__SYMMETRIC_RICE
1875
partition_bits = (2+rice_parameter) * residual_samples;
1876
#else
1877
const unsigned rice_parameter_estimate = rice_parameter-1;
1878
partition_bits = (1+rice_parameter) * residual_samples;
1879
#endif
1880
#else
1881
partition_bits = 0;
1882
#endif
1883
partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
1884
for(i = 0; i < residual_samples; i++) {
1885
#ifdef VARIABLE_RICE_BITS
1886
#ifdef FLAC__SYMMETRIC_RICE
1887
partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter);
1888
#else
1889
partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter_estimate);
1890
#endif
1891
#else
1892
partition_bits += FLAC__bitbuffer_rice_bits(residual[i], rice_parameter); /* NOTE: we will need to pass in residual[] instead of abs_residual[] */
1893
#endif
1894
}
1895
#ifndef NO_RICE_SEARCH
1896
if(partition_bits < best_partition_bits) {
1897
best_rice_parameter = rice_parameter;
1898
best_partition_bits = partition_bits;
1899
}
1900
}
1901
#endif
1902
if(search_for_escapes) {
1903
flat_bits = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN + raw_bits_per_partition[0] * residual_samples;
1904
if(flat_bits <= best_partition_bits) {
1905
raw_bits[0] = raw_bits_per_partition[0];
1906
best_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
1907
best_partition_bits = flat_bits;
1908
}
1909
}
1910
parameters[0] = best_rice_parameter;
1911
bits_ += best_partition_bits;
1912
}
1913
else {
1914
unsigned partition, residual_sample, save_residual_sample, partition_sample;
1915
unsigned partition_samples;
1916
FLAC__uint64 mean, k;
1917
const unsigned partitions = 1u << partition_order;
1918
for(partition = residual_sample = 0; partition < partitions; partition++) {
1919
partition_samples = (residual_samples+predictor_order) >> partition_order;
1920
if(partition == 0) {
1921
if(partition_samples <= predictor_order)
1922
return false;
1923
else
1924
partition_samples -= predictor_order;
1925
}
1926
mean = abs_residual_partition_sums[partition];
1927
#ifdef FLAC__SYMMETRIC_RICE
1928
mean += partition_samples >> 1; /* for rounding effect */
1929
mean /= partition_samples;
1930
1931
/* calc rice_parameter = floor(log2(mean)) */
1932
rice_parameter = 0;
1933
mean>>=1;
1934
while(mean) {
1935
rice_parameter++;
1936
mean >>= 1;
1937
}
1938
#else
1939
/* calc rice_parameter ala LOCO-I */
1940
for(rice_parameter = 0, k = partition_samples; k < mean; rice_parameter++, k <<= 1)
1941
;
1942
#endif
1943
if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1944
#ifdef DEBUG_VERBOSE
1945
fprintf(stderr, "clipping rice_parameter (%u -> %u) @6\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1946
#endif
1947
rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1948
}
1949
1950
#ifndef NO_RICE_SEARCH
1951
if(rice_parameter_search_dist) {
1952
if(rice_parameter < rice_parameter_search_dist)
1953
min_rice_parameter = 0;
1954
else
1955
min_rice_parameter = rice_parameter - rice_parameter_search_dist;
1956
max_rice_parameter = rice_parameter + rice_parameter_search_dist;
1957
if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
1958
#ifdef DEBUG_VERBOSE
1959
fprintf(stderr, "clipping rice_parameter (%u -> %u) @7\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
1960
#endif
1961
max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
1962
}
1963
}
1964
else
1965
min_rice_parameter = max_rice_parameter = rice_parameter;
1966
1967
best_partition_bits = 0xffffffff;
1968
for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) {
1969
#endif
1970
#ifdef VARIABLE_RICE_BITS
1971
#ifdef FLAC__SYMMETRIC_RICE
1972
partition_bits = (2+rice_parameter) * partition_samples;
1973
#else
1974
const unsigned rice_parameter_estimate = rice_parameter-1;
1975
partition_bits = (1+rice_parameter) * partition_samples;
1976
#endif
1977
#else
1978
partition_bits = 0;
1979
#endif
1980
partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
1981
save_residual_sample = residual_sample;
1982
for(partition_sample = 0; partition_sample < partition_samples; residual_sample++, partition_sample++) {
1983
#ifdef VARIABLE_RICE_BITS
1984
#ifdef FLAC__SYMMETRIC_RICE
1985
partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter);
1986
#else
1987
partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter_estimate);
1988
#endif
1989
#else
1990
partition_bits += FLAC__bitbuffer_rice_bits(residual[residual_sample], rice_parameter); /* NOTE: we will need to pass in residual[] instead of abs_residual[] */
1991
#endif
1992
}
1993
#ifndef NO_RICE_SEARCH
1994
if(rice_parameter != max_rice_parameter)
1995
residual_sample = save_residual_sample;
1996
if(partition_bits < best_partition_bits) {
1997
best_rice_parameter = rice_parameter;
1998
best_partition_bits = partition_bits;
1999
}
2000
}
2001
#endif
2002
if(search_for_escapes) {
2003
flat_bits = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN + raw_bits_per_partition[partition] * partition_samples;
2004
if(flat_bits <= best_partition_bits) {
2005
raw_bits[partition] = raw_bits_per_partition[partition];
2006
best_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
2007
best_partition_bits = flat_bits;
2008
}
2009
}
2010
parameters[partition] = best_rice_parameter;
2011
bits_ += best_partition_bits;
2012
}
2013
}
2014
2015
*bits = bits_;
2016
return true;
2017
}
2018
2019
unsigned stream_encoder_get_wasted_bits_(FLAC__int32 signal[], unsigned samples)
2020
{
2021
unsigned i, shift;
2022
FLAC__int32 x = 0;
2023
2024
for(i = 0; i < samples && !(x&1); i++)
2025
x |= signal[i];
2026
2027
if(x == 0) {
2028
shift = 0;
2029
}
2030
else {
2031
for(shift = 0; !(x&1); shift++)
2032
x >>= 1;
2033
}
2034
2035
if(shift > 0) {
2036
for(i = 0; i < samples; i++)
2037
signal[i] >>= shift;
2038
}
2039
2040
return shift;
2041
}
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