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  • Committer: Bazaar Package Importer
  • Author(s): Sebastian Dröge
  • Date: 2009-02-22 12:24:07 UTC
  • mfrom: (1.1.24 jaunty)
  • Revision ID: james.westby@ubuntu.com-20090222122407-nubojphrd84klmee
Tags: 0.10.6-3
Upload to unstable.

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gst-libs/ext/ffmpeg/libavcodec/ac3enc.c
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/*
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 * The simplest AC3 encoder
 
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 * The simplest AC-3 encoder
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 * Copyright (c) 2000 Fabrice Bellard.
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 *
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 * This file is part of FFmpeg.
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/**
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 * @file ac3enc.c
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 * The simplest AC3 encoder.
 
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 * The simplest AC-3 encoder.
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 */
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//#define DEBUG
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//#define DEBUG_BITALLOC
 
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#include "libavutil/crc.h"
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#include "avcodec.h"
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#include "bitstream.h"
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#include "crc.h"
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#include "ac3.h"
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typedef struct AC3EncodeContext {
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        for(ch=0;ch<s->nb_all_channels;ch++) {
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            ff_ac3_bit_alloc_calc_bap(mask[i][ch], psd[i][ch], 0,
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                                      s->nb_coefs[ch], snr_offset,
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                                      s->bit_alloc.floor, bap[i][ch]);
 
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                                      s->bit_alloc.floor, ff_ac3_bap_tab,
 
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                                      bap[i][ch]);
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            frame_bits += compute_mantissa_size(s, bap[i][ch],
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                                                 s->nb_coefs[ch]);
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        }
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    uint8_t bap1[NB_BLOCKS][AC3_MAX_CHANNELS][N/2];
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    int16_t psd[NB_BLOCKS][AC3_MAX_CHANNELS][N/2];
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    int16_t mask[NB_BLOCKS][AC3_MAX_CHANNELS][50];
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    static int frame_bits_inc[8] = { 0, 0, 2, 2, 2, 4, 2, 4 };
 
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    static const int frame_bits_inc[8] = { 0, 0, 2, 2, 2, 4, 2, 4 };
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    /* init default parameters */
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    s->slow_decay_code = 2;
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    return 0;
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}
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/* output the AC3 frame header */
 
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/* output the AC-3 frame header */
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static void output_frame_header(AC3EncodeContext *s, unsigned char *frame)
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{
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    init_put_bits(&s->pb, frame, AC3_MAX_CODED_FRAME_SIZE);
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    return v & ((1 << qbits)-1);
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}
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/* Output one audio block. There are NB_BLOCKS audio blocks in one AC3
 
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/* Output one audio block. There are NB_BLOCKS audio blocks in one AC-3
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   frame */
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static void output_audio_block(AC3EncodeContext *s,
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                               uint8_t exp_strategy[AC3_MAX_CHANNELS],
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    AC3_encode_frame,
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    AC3_encode_close,
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    NULL,
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    .long_name = "ATSC A/52 / AC-3",
 
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    .sample_fmts = (enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
 
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    .long_name = NULL_IF_CONFIG_SMALL("ATSC A/52A (AC-3)"),
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};