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Viewing changes to libavcodec/dxva2_mpeg2.c

  • Committer: Bazaar Package Importer
  • Author(s): Reinhard Tartler
  • Date: 2011-04-30 14:27:42 UTC
  • mfrom: (1.1.2 experimental)
  • Revision ID: james.westby@ubuntu.com-20110430142742-quvblxk1tj6adlh5
Tags: 4:0.7~b1-1ubuntu1
http://bugs.debian.org/623682
* Merge from debian. Remaining changes:
  - don't build against libfaad, libdirac, librtmp and libopenjpeg
    (all in universe)
  - explicitly --enable-pic on powerpc, cf. LP #654666
  - different arm configure bits that should probably better be
    merged into debian
* Cherry-picked from git: 
  - install doc/APIChanges and refer to them in NEWS.Debian (Closes: #623682)
  - don't try to install non-existing documentation, fixes FTBFS on powerpc

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libavcodec/dxva2_mpeg2.c
 
1
/*
 
2
 * MPEG-2 HW acceleration.
 
3
 *
 
4
 * copyright (c) 2010 Laurent Aimar
 
5
 *
 
6
 * This file is part of Libav.
 
7
 *
 
8
 * Libav is free software; you can redistribute it and/or
 
9
 * modify it under the terms of the GNU Lesser General Public
 
10
 * License as published by the Free Software Foundation; either
 
11
 * version 2.1 of the License, or (at your option) any later version.
 
12
 *
 
13
 * Libav is distributed in the hope that it will be useful,
 
14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 
16
 * Lesser General Public License for more details.
 
17
 *
 
18
 * You should have received a copy of the GNU Lesser General Public
 
19
 * License along with Libav; if not, write to the Free Software
 
20
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
21
 */
 
22
 
 
23
#include "dxva2_internal.h"
 
24
 
 
25
#define MAX_SLICES (SLICE_MAX_START_CODE - SLICE_MIN_START_CODE + 1)
 
26
struct dxva2_picture_context {
 
27
    DXVA_PictureParameters pp;
 
28
    DXVA_QmatrixData       qm;
 
29
    unsigned               slice_count;
 
30
    DXVA_SliceInfo         slice[MAX_SLICES];
 
31
 
 
32
    const uint8_t          *bitstream;
 
33
    unsigned               bitstream_size;
 
34
};
 
35
 
 
36
static void fill_picture_parameters(AVCodecContext *avctx,
 
37
                                    struct dxva_context *ctx,
 
38
                                    const struct MpegEncContext *s,
 
39
                                    DXVA_PictureParameters *pp)
 
40
{
 
41
    const Picture *current_picture = s->current_picture_ptr;
 
42
    int is_field = s->picture_structure != PICT_FRAME;
 
43
 
 
44
    memset(pp, 0, sizeof(*pp));
 
45
    pp->wDecodedPictureIndex         = ff_dxva2_get_surface_index(ctx, current_picture);
 
46
    pp->wDeblockedPictureIndex       = 0;
 
47
    if (s->pict_type != FF_I_TYPE)
 
48
        pp->wForwardRefPictureIndex  = ff_dxva2_get_surface_index(ctx, &s->last_picture);
 
49
    else
 
50
        pp->wForwardRefPictureIndex  = 0xffff;
 
51
    if (s->pict_type == FF_B_TYPE)
 
52
        pp->wBackwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, &s->next_picture);
 
53
    else
 
54
        pp->wBackwardRefPictureIndex = 0xffff;
 
55
    pp->wPicWidthInMBminus1          = s->mb_width  - 1;
 
56
    pp->wPicHeightInMBminus1         = (s->mb_height >> is_field) - 1;
 
57
    pp->bMacroblockWidthMinus1       = 15;
 
58
    pp->bMacroblockHeightMinus1      = 15;
 
59
    pp->bBlockWidthMinus1            = 7;
 
60
    pp->bBlockHeightMinus1           = 7;
 
61
    pp->bBPPminus1                   = 7;
 
62
    pp->bPicStructure                = s->picture_structure;
 
63
    pp->bSecondField                 = is_field && !s->first_field;
 
64
    pp->bPicIntra                    = s->pict_type == FF_I_TYPE;
 
65
    pp->bPicBackwardPrediction       = s->pict_type == FF_B_TYPE;
 
66
    pp->bBidirectionalAveragingMode  = 0;
 
67
    pp->bMVprecisionAndChromaRelation= 0; /* FIXME */
 
68
    pp->bChromaFormat                = s->chroma_format;
 
69
    pp->bPicScanFixed                = 1;
 
70
    pp->bPicScanMethod               = s->alternate_scan ? 1 : 0;
 
71
    pp->bPicReadbackRequests         = 0;
 
72
    pp->bRcontrol                    = 0;
 
73
    pp->bPicSpatialResid8            = 0;
 
74
    pp->bPicOverflowBlocks           = 0;
 
75
    pp->bPicExtrapolation            = 0;
 
76
    pp->bPicDeblocked                = 0;
 
77
    pp->bPicDeblockConfined          = 0;
 
78
    pp->bPic4MVallowed               = 0;
 
79
    pp->bPicOBMC                     = 0;
 
80
    pp->bPicBinPB                    = 0;
 
81
    pp->bMV_RPS                      = 0;
 
82
    pp->bReservedBits                = 0;
 
83
    pp->wBitstreamFcodes             = (s->mpeg_f_code[0][0] << 12) |
 
84
                                       (s->mpeg_f_code[0][1] <<  8) |
 
85
                                       (s->mpeg_f_code[1][0] <<  4) |
 
86
                                       (s->mpeg_f_code[1][1]      );
 
87
    pp->wBitstreamPCEelements        = (s->intra_dc_precision         << 14) |
 
88
                                       (s->picture_structure          << 12) |
 
89
                                       (s->top_field_first            << 11) |
 
90
                                       (s->frame_pred_frame_dct       << 10) |
 
91
                                       (s->concealment_motion_vectors <<  9) |
 
92
                                       (s->q_scale_type               <<  8) |
 
93
                                       (s->intra_vlc_format           <<  7) |
 
94
                                       (s->alternate_scan             <<  6) |
 
95
                                       (s->repeat_first_field         <<  5) |
 
96
                                       (s->chroma_420_type            <<  4) |
 
97
                                       (s->progressive_frame          <<  3);
 
98
    pp->bBitstreamConcealmentNeed    = 0;
 
99
    pp->bBitstreamConcealmentMethod  = 0;
 
100
}
 
101
 
 
102
static void fill_quantization_matrices(AVCodecContext *avctx,
 
103
                                       struct dxva_context *ctx,
 
104
                                       const struct MpegEncContext *s,
 
105
                                       DXVA_QmatrixData *qm)
 
106
{
 
107
    int i;
 
108
    for (i = 0; i < 4; i++)
 
109
        qm->bNewQmatrix[i] = 1;
 
110
    for (i = 0; i < 64; i++) {
 
111
        int n = s->dsp.idct_permutation[ff_zigzag_direct[i]];
 
112
        qm->Qmatrix[0][i] = s->intra_matrix[n];;
 
113
        qm->Qmatrix[1][i] = s->inter_matrix[n];;
 
114
        qm->Qmatrix[2][i] = s->chroma_intra_matrix[n];;
 
115
        qm->Qmatrix[3][i] = s->chroma_inter_matrix[n];;
 
116
    }
 
117
}
 
118
 
 
119
static void fill_slice(AVCodecContext *avctx,
 
120
                       const struct MpegEncContext *s,
 
121
                       DXVA_SliceInfo *slice,
 
122
                       unsigned position,
 
123
                       const uint8_t *buffer, unsigned size)
 
124
{
 
125
    int is_field = s->picture_structure != PICT_FRAME;
 
126
    GetBitContext gb;
 
127
 
 
128
    memset(slice, 0, sizeof(*slice));
 
129
    slice->wHorizontalPosition = s->mb_x;
 
130
    slice->wVerticalPosition   = s->mb_y >> is_field;
 
131
    slice->dwSliceBitsInBuffer = 8 * size;
 
132
    slice->dwSliceDataLocation = position;
 
133
    slice->bStartCodeBitOffset = 0;
 
134
    slice->bReservedBits       = 0;
 
135
    /* XXX We store the index of the first MB and it will be fixed later */
 
136
    slice->wNumberMBsInSlice   = (s->mb_y >> is_field) * s->mb_width + s->mb_x;
 
137
    slice->wBadSliceChopping   = 0;
 
138
 
 
139
    init_get_bits(&gb, &buffer[4], 8 * (size - 4));
 
140
 
 
141
    slice->wQuantizerScaleCode = get_bits(&gb, 5);
 
142
    while (get_bits1(&gb))
 
143
        skip_bits(&gb, 8);
 
144
 
 
145
    slice->wMBbitOffset        = 4 * 8 + get_bits_count(&gb);
 
146
}
 
147
static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
 
148
                                             DXVA2_DecodeBufferDesc *bs,
 
149
                                             DXVA2_DecodeBufferDesc *sc)
 
150
{
 
151
    const struct MpegEncContext *s = avctx->priv_data;
 
152
    struct dxva_context *ctx = avctx->hwaccel_context;
 
153
    struct dxva2_picture_context *ctx_pic =
 
154
        s->current_picture_ptr->hwaccel_picture_private;
 
155
    const int is_field = s->picture_structure != PICT_FRAME;
 
156
    const unsigned mb_count = s->mb_width * (s->mb_height >> is_field);
 
157
    uint8_t  *dxva_data, *current, *end;
 
158
    unsigned dxva_size;
 
159
    unsigned i;
 
160
 
 
161
    if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder,
 
162
                                              DXVA2_BitStreamDateBufferType,
 
163
                                              &dxva_data, &dxva_size)))
 
164
        return -1;
 
165
    current = dxva_data;
 
166
    end = dxva_data + dxva_size;
 
167
 
 
168
    for (i = 0; i < ctx_pic->slice_count; i++) {
 
169
        DXVA_SliceInfo *slice = &ctx_pic->slice[i];
 
170
        unsigned position = slice->dwSliceDataLocation;
 
171
        unsigned size     = slice->dwSliceBitsInBuffer / 8;
 
172
        if (size > end - current) {
 
173
            av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
 
174
            break;
 
175
        }
 
176
        slice->dwSliceDataLocation = current - dxva_data;
 
177
 
 
178
        if (i < ctx_pic->slice_count - 1)
 
179
            slice->wNumberMBsInSlice =
 
180
                slice[1].wNumberMBsInSlice - slice[0].wNumberMBsInSlice;
 
181
        else
 
182
            slice->wNumberMBsInSlice =
 
183
                mb_count - slice[0].wNumberMBsInSlice;
 
184
 
 
185
        memcpy(current, &ctx_pic->bitstream[position], size);
 
186
        current += size;
 
187
    }
 
188
    if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder,
 
189
                                                  DXVA2_BitStreamDateBufferType)))
 
190
        return -1;
 
191
    if (i < ctx_pic->slice_count)
 
192
        return -1;
 
193
 
 
194
    memset(bs, 0, sizeof(*bs));
 
195
    bs->CompressedBufferType = DXVA2_BitStreamDateBufferType;
 
196
    bs->DataSize             = current - dxva_data;
 
197
    bs->NumMBsInBuffer       = mb_count;
 
198
 
 
199
    return ff_dxva2_commit_buffer(avctx, ctx, sc,
 
200
                                  DXVA2_SliceControlBufferType,
 
201
                                  ctx_pic->slice,
 
202
                                  ctx_pic->slice_count * sizeof(*ctx_pic->slice),
 
203
                                  mb_count);
 
204
}
 
205
 
 
206
static int start_frame(AVCodecContext *avctx,
 
207
                       av_unused const uint8_t *buffer,
 
208
                       av_unused uint32_t size)
 
209
{
 
210
    const struct MpegEncContext *s = avctx->priv_data;
 
211
    struct dxva_context *ctx = avctx->hwaccel_context;
 
212
    struct dxva2_picture_context *ctx_pic =
 
213
        s->current_picture_ptr->hwaccel_picture_private;
 
214
 
 
215
    if (!ctx->decoder || !ctx->cfg || ctx->surface_count <= 0)
 
216
        return -1;
 
217
    assert(ctx_pic);
 
218
 
 
219
    fill_picture_parameters(avctx, ctx, s, &ctx_pic->pp);
 
220
    fill_quantization_matrices(avctx, ctx, s, &ctx_pic->qm);
 
221
 
 
222
    ctx_pic->slice_count    = 0;
 
223
    ctx_pic->bitstream_size = 0;
 
224
    ctx_pic->bitstream      = NULL;
 
225
    return 0;
 
226
}
 
227
 
 
228
static int decode_slice(AVCodecContext *avctx,
 
229
                        const uint8_t *buffer, uint32_t size)
 
230
{
 
231
    const struct MpegEncContext *s = avctx->priv_data;
 
232
    struct dxva2_picture_context *ctx_pic =
 
233
        s->current_picture_ptr->hwaccel_picture_private;
 
234
    unsigned position;
 
235
 
 
236
    if (ctx_pic->slice_count >= MAX_SLICES)
 
237
        return -1;
 
238
 
 
239
    if (!ctx_pic->bitstream)
 
240
        ctx_pic->bitstream = buffer;
 
241
    ctx_pic->bitstream_size += size;
 
242
 
 
243
    position = buffer - ctx_pic->bitstream;
 
244
    fill_slice(avctx, s, &ctx_pic->slice[ctx_pic->slice_count++], position,
 
245
               buffer, size);
 
246
    return 0;
 
247
}
 
248
 
 
249
static int end_frame(AVCodecContext *avctx)
 
250
{
 
251
    struct MpegEncContext *s = avctx->priv_data;
 
252
    struct dxva2_picture_context *ctx_pic =
 
253
        s->current_picture_ptr->hwaccel_picture_private;
 
254
 
 
255
    if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
 
256
        return -1;
 
257
    return ff_dxva2_common_end_frame(avctx, s,
 
258
                                     &ctx_pic->pp, sizeof(ctx_pic->pp),
 
259
                                     &ctx_pic->qm, sizeof(ctx_pic->qm),
 
260
                                     commit_bitstream_and_slice_buffer);
 
261
}
 
262
 
 
263
AVHWAccel ff_mpeg2_dxva2_hwaccel = {
 
264
    .name           = "mpeg2_dxva2",
 
265
    .type           = AVMEDIA_TYPE_VIDEO,
 
266
    .id             = CODEC_ID_MPEG2VIDEO,
 
267
    .pix_fmt        = PIX_FMT_DXVA2_VLD,
 
268
    .capabilities   = 0,
 
269
    .start_frame    = start_frame,
 
270
    .decode_slice   = decode_slice,
 
271
    .end_frame      = end_frame,
 
272
    .priv_data_size = sizeof(struct dxva2_picture_context),
 
273
};
 
274