aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/dxva2_h264.c
blob: fc9fbd478f8c10cd0392f628fd9377787e28ea54 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
/*
 * DXVA2 H264 HW acceleration.
 *
 * copyright (c) 2009 Laurent Aimar
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "dxva2_internal.h"
#include "h264.h"
#include "h264data.h"
#include "mpegutils.h"

struct dxva2_picture_context {
    DXVA_PicParams_H264   pp;
    DXVA_Qmatrix_H264     qm;
    unsigned              slice_count;
    DXVA_Slice_H264_Short slice_short[MAX_SLICES];
    DXVA_Slice_H264_Long  slice_long[MAX_SLICES];
    const uint8_t         *bitstream;
    unsigned              bitstream_size;
};

static void fill_picture_entry(DXVA_PicEntry_H264 *pic,
                               unsigned index, unsigned flag)
{
    assert((index&0x7f) == index && (flag&0x01) == flag);
    pic->bPicEntry = index | (flag << 7);
}

static void fill_picture_parameters(struct dxva_context *ctx, const H264Context *h,
                                    DXVA_PicParams_H264 *pp)
{
    const H264Picture *current_picture = h->cur_pic_ptr;
    int i, j;

    memset(pp, 0, sizeof(*pp));
    /* Configure current picture */
    fill_picture_entry(&pp->CurrPic,
                       ff_dxva2_get_surface_index(ctx, &current_picture->f),
                       h->picture_structure == PICT_BOTTOM_FIELD);
    /* Configure the set of references */
    pp->UsedForReferenceFlags  = 0;
    pp->NonExistingFrameFlags  = 0;
    for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->RefFrameList); i++) {
        const H264Picture *r;
        if (j < h->short_ref_count) {
            r = h->short_ref[j++];
        } else {
            r = NULL;
            while (!r && j < h->short_ref_count + 16)
                r = h->long_ref[j++ - h->short_ref_count];
        }
        if (r) {
            fill_picture_entry(&pp->RefFrameList[i],
                               ff_dxva2_get_surface_index(ctx, &r->f),
                               r->long_ref != 0);

            if ((r->reference & PICT_TOP_FIELD) && r->field_poc[0] != INT_MAX)
                pp->FieldOrderCntList[i][0] = r->field_poc[0];
            if ((r->reference & PICT_BOTTOM_FIELD) && r->field_poc[1] != INT_MAX)
                pp->FieldOrderCntList[i][1] = r->field_poc[1];

            pp->FrameNumList[i] = r->long_ref ? r->pic_id : r->frame_num;
            if (r->reference & PICT_TOP_FIELD)
                pp->UsedForReferenceFlags |= 1 << (2*i + 0);
            if (r->reference & PICT_BOTTOM_FIELD)
                pp->UsedForReferenceFlags |= 1 << (2*i + 1);
        } else {
            pp->RefFrameList[i].bPicEntry = 0xff;
            pp->FieldOrderCntList[i][0]   = 0;
            pp->FieldOrderCntList[i][1]   = 0;
            pp->FrameNumList[i]           = 0;
        }
    }

    pp->wFrameWidthInMbsMinus1        = h->mb_width  - 1;
    pp->wFrameHeightInMbsMinus1       = h->mb_height - 1;
    pp->num_ref_frames                = h->sps.ref_frame_count;

    pp->wBitFields                    = ((h->picture_structure != PICT_FRAME) <<  0) |
                                        ((h->sps.mb_aff &&
                                        (h->picture_structure == PICT_FRAME)) <<  1) |
                                        (h->sps.residual_color_transform_flag <<  2) |
                                        /* sp_for_switch_flag (not implemented by FFmpeg) */
                                        (0                                    <<  3) |
                                        (h->sps.chroma_format_idc             <<  4) |
                                        ((h->nal_ref_idc != 0)                <<  6) |
                                        (h->pps.constrained_intra_pred        <<  7) |
                                        (h->pps.weighted_pred                 <<  8) |
                                        (h->pps.weighted_bipred_idc           <<  9) |
                                        /* MbsConsecutiveFlag */
                                        (1                                    << 11) |
                                        (h->sps.frame_mbs_only_flag           << 12) |
                                        (h->pps.transform_8x8_mode            << 13) |
                                        ((h->sps.level_idc >= 31)             << 14) |
                                        /* IntraPicFlag (Modified if we detect a non
                                         * intra slice in dxva2_h264_decode_slice) */
                                        (1                                    << 15);

    pp->bit_depth_luma_minus8         = h->sps.bit_depth_luma - 8;
    pp->bit_depth_chroma_minus8       = h->sps.bit_depth_chroma - 8;
    if (ctx->workaround & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG)
        pp->Reserved16Bits            = 0;
    else if (ctx->workaround & FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO)
        pp->Reserved16Bits            = 0x34c;
    else
        pp->Reserved16Bits            = 3; /* FIXME is there a way to detect the right mode ? */
    pp->StatusReportFeedbackNumber    = 1 + ctx->report_id++;
    pp->CurrFieldOrderCnt[0] = 0;
    if ((h->picture_structure & PICT_TOP_FIELD) &&
        current_picture->field_poc[0] != INT_MAX)
        pp->CurrFieldOrderCnt[0] = current_picture->field_poc[0];
    pp->CurrFieldOrderCnt[1] = 0;
    if ((h->picture_structure & PICT_BOTTOM_FIELD) &&
        current_picture->field_poc[1] != INT_MAX)
        pp->CurrFieldOrderCnt[1] = current_picture->field_poc[1];
    pp->pic_init_qs_minus26           = h->pps.init_qs - 26;
    pp->chroma_qp_index_offset        = h->pps.chroma_qp_index_offset[0];
    pp->second_chroma_qp_index_offset = h->pps.chroma_qp_index_offset[1];
    pp->ContinuationFlag              = 1;
    pp->pic_init_qp_minus26           = h->pps.init_qp - 26;
    pp->num_ref_idx_l0_active_minus1  = h->pps.ref_count[0] - 1;
    pp->num_ref_idx_l1_active_minus1  = h->pps.ref_count[1] - 1;
    pp->Reserved8BitsA                = 0;
    pp->frame_num                     = h->frame_num;
    pp->log2_max_frame_num_minus4     = h->sps.log2_max_frame_num - 4;
    pp->pic_order_cnt_type            = h->sps.poc_type;
    if (h->sps.poc_type == 0)
        pp->log2_max_pic_order_cnt_lsb_minus4 = h->sps.log2_max_poc_lsb - 4;
    else if (h->sps.poc_type == 1)
        pp->delta_pic_order_always_zero_flag = h->sps.delta_pic_order_always_zero_flag;
    pp->direct_8x8_inference_flag     = h->sps.direct_8x8_inference_flag;
    pp->entropy_coding_mode_flag      = h->pps.cabac;
    pp->pic_order_present_flag        = h->pps.pic_order_present;
    pp->num_slice_groups_minus1       = h->pps.slice_group_count - 1;
    pp->slice_group_map_type          = h->pps.mb_slice_group_map_type;
    pp->deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present;
    pp->redundant_pic_cnt_present_flag= h->pps.redundant_pic_cnt_present;
    pp->Reserved8BitsB                = 0;
    pp->slice_group_change_rate_minus1= 0;  /* XXX not implemented by FFmpeg */
    //pp->SliceGroupMap[810];               /* XXX not implemented by FFmpeg */
}

static void fill_scaling_lists(struct dxva_context *ctx, const H264Context *h, DXVA_Qmatrix_H264 *qm)
{
    unsigned i, j;
    memset(qm, 0, sizeof(*qm));
    if (ctx->workaround & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG) {
        for (i = 0; i < 6; i++)
            for (j = 0; j < 16; j++)
                qm->bScalingLists4x4[i][j] = h->pps.scaling_matrix4[i][j];

        for (i = 0; i < 64; i++) {
            qm->bScalingLists8x8[0][i] = h->pps.scaling_matrix8[0][i];
            qm->bScalingLists8x8[1][i] = h->pps.scaling_matrix8[3][i];
        }
    } else {
        for (i = 0; i < 6; i++)
            for (j = 0; j < 16; j++)
                qm->bScalingLists4x4[i][j] = h->pps.scaling_matrix4[i][zigzag_scan[j]];

        for (i = 0; i < 64; i++) {
            qm->bScalingLists8x8[0][i] = h->pps.scaling_matrix8[0][ff_zigzag_direct[i]];
            qm->bScalingLists8x8[1][i] = h->pps.scaling_matrix8[3][ff_zigzag_direct[i]];
        }
    }
}

static int is_slice_short(struct dxva_context *ctx)
{
    assert(ctx->cfg->ConfigBitstreamRaw == 1 ||
           ctx->cfg->ConfigBitstreamRaw == 2);
    return ctx->cfg->ConfigBitstreamRaw == 2;
}

static void fill_slice_short(DXVA_Slice_H264_Short *slice,
                             unsigned position, unsigned size)
{
    memset(slice, 0, sizeof(*slice));
    slice->BSNALunitDataLocation = position;
    slice->SliceBytesInBuffer    = size;
    slice->wBadSliceChopping     = 0;
}

static int get_refpic_index(const DXVA_PicParams_H264 *pp, int surface_index)
{
    int i;
    for (i = 0; i < FF_ARRAY_ELEMS(pp->RefFrameList); i++) {
        if ((pp->RefFrameList[i].bPicEntry & 0x7f) == surface_index)
          return i;
    }
    return 0x7f;
}

static void fill_slice_long(AVCodecContext *avctx, DXVA_Slice_H264_Long *slice,
                            const DXVA_PicParams_H264 *pp, unsigned position, unsigned size)
{
    const H264Context *h = avctx->priv_data;
    H264SliceContext *sl = &h->slice_ctx[0];
    struct dxva_context *ctx = avctx->hwaccel_context;
    unsigned list;

    memset(slice, 0, sizeof(*slice));
    slice->BSNALunitDataLocation = position;
    slice->SliceBytesInBuffer    = size;
    slice->wBadSliceChopping     = 0;

    slice->first_mb_in_slice     = (h->mb_y >> FIELD_OR_MBAFF_PICTURE(h)) * h->mb_width + h->mb_x;
    slice->NumMbsForSlice        = 0; /* XXX it is set once we have all slices */
    slice->BitOffsetToSliceData  = get_bits_count(&h->gb);
    slice->slice_type            = ff_h264_get_slice_type(sl);
    if (sl->slice_type_fixed)
        slice->slice_type += 5;
    slice->luma_log2_weight_denom       = sl->luma_log2_weight_denom;
    slice->chroma_log2_weight_denom     = sl->chroma_log2_weight_denom;
    if (h->list_count > 0)
        slice->num_ref_idx_l0_active_minus1 = h->ref_count[0] - 1;
    if (h->list_count > 1)
        slice->num_ref_idx_l1_active_minus1 = h->ref_count[1] - 1;
    slice->slice_alpha_c0_offset_div2   = h->slice_alpha_c0_offset / 2;
    slice->slice_beta_offset_div2       = h->slice_beta_offset     / 2;
    slice->Reserved8Bits                = 0;

    for (list = 0; list < 2; list++) {
        unsigned i;
        for (i = 0; i < FF_ARRAY_ELEMS(slice->RefPicList[list]); i++) {
            if (list < h->list_count && i < h->ref_count[list]) {
                const H264Picture *r = &h->ref_list[list][i];
                unsigned plane;
                unsigned index;
                if (ctx->workaround & FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO)
                    index = ff_dxva2_get_surface_index(ctx, &r->f);
                else
                    index = get_refpic_index(pp, ff_dxva2_get_surface_index(ctx, &r->f));
                fill_picture_entry(&slice->RefPicList[list][i], index,
                                   r->reference == PICT_BOTTOM_FIELD);
                for (plane = 0; plane < 3; plane++) {
                    int w, o;
                    if (plane == 0 && sl->luma_weight_flag[list]) {
                        w = sl->luma_weight[i][list][0];
                        o = sl->luma_weight[i][list][1];
                    } else if (plane >= 1 && sl->chroma_weight_flag[list]) {
                        w = sl->chroma_weight[i][list][plane-1][0];
                        o = sl->chroma_weight[i][list][plane-1][1];
                    } else {
                        w = 1 << (plane == 0 ? sl->luma_log2_weight_denom :
                                               sl->chroma_log2_weight_denom);
                        o = 0;
                    }
                    slice->Weights[list][i][plane][0] = w;
                    slice->Weights[list][i][plane][1] = o;
                }
            } else {
                unsigned plane;
                slice->RefPicList[list][i].bPicEntry = 0xff;
                for (plane = 0; plane < 3; plane++) {
                    slice->Weights[list][i][plane][0] = 0;
                    slice->Weights[list][i][plane][1] = 0;
                }
            }
        }
    }
    slice->slice_qs_delta    = 0; /* XXX not implemented by FFmpeg */
    slice->slice_qp_delta    = sl->qscale - h->pps.init_qp;
    slice->redundant_pic_cnt = h->redundant_pic_count;
    if (sl->slice_type == AV_PICTURE_TYPE_B)
        slice->direct_spatial_mv_pred_flag = sl->direct_spatial_mv_pred;
    slice->cabac_init_idc = h->pps.cabac ? h->cabac_init_idc : 0;
    if (h->deblocking_filter < 2)
        slice->disable_deblocking_filter_idc = 1 - h->deblocking_filter;
    else
        slice->disable_deblocking_filter_idc = h->deblocking_filter;
    slice->slice_id = h->current_slice - 1;
}

static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
                                             DXVA2_DecodeBufferDesc *bs,
                                             DXVA2_DecodeBufferDesc *sc)
{
    const H264Context *h = avctx->priv_data;
    const unsigned mb_count = h->mb_width * h->mb_height;
    struct dxva_context *ctx = avctx->hwaccel_context;
    const H264Picture *current_picture = h->cur_pic_ptr;
    struct dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
    DXVA_Slice_H264_Short *slice = NULL;
    void     *dxva_data_ptr;
    uint8_t  *dxva_data, *current, *end;
    unsigned dxva_size;
    void     *slice_data;
    unsigned slice_size;
    unsigned padding;
    unsigned i;

    /* Create an annex B bitstream buffer with only slice NAL and finalize slice */
    if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder,
                                              DXVA2_BitStreamDateBufferType,
                                              &dxva_data_ptr, &dxva_size)))
        return -1;

    dxva_data = dxva_data_ptr;
    current = dxva_data;
    end = dxva_data + dxva_size;

    for (i = 0; i < ctx_pic->slice_count; i++) {
        static const uint8_t start_code[] = { 0, 0, 1 };
        static const unsigned start_code_size = sizeof(start_code);
        unsigned position, size;

        assert(offsetof(DXVA_Slice_H264_Short, BSNALunitDataLocation) ==
               offsetof(DXVA_Slice_H264_Long,  BSNALunitDataLocation));
        assert(offsetof(DXVA_Slice_H264_Short, SliceBytesInBuffer) ==
               offsetof(DXVA_Slice_H264_Long,  SliceBytesInBuffer));

        if (is_slice_short(ctx))
            slice = &ctx_pic->slice_short[i];
        else
            slice = (DXVA_Slice_H264_Short*)&ctx_pic->slice_long[i];

        position = slice->BSNALunitDataLocation;
        size     = slice->SliceBytesInBuffer;
        if (start_code_size + size > end - current) {
            av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
            break;
        }

        slice->BSNALunitDataLocation = current - dxva_data;
        slice->SliceBytesInBuffer    = start_code_size + size;

        if (!is_slice_short(ctx)) {
            DXVA_Slice_H264_Long *slice_long = (DXVA_Slice_H264_Long*)slice;
            if (i < ctx_pic->slice_count - 1)
                slice_long->NumMbsForSlice =
                    slice_long[1].first_mb_in_slice - slice_long[0].first_mb_in_slice;
            else
                slice_long->NumMbsForSlice = mb_count - slice_long->first_mb_in_slice;
        }

        memcpy(current, start_code, start_code_size);
        current += start_code_size;

        memcpy(current, &ctx_pic->bitstream[position], size);
        current += size;
    }
    padding = FFMIN(128 - ((current - dxva_data) & 127), end - current);
    if (slice && padding > 0) {
        memset(current, 0, padding);
        current += padding;

        slice->SliceBytesInBuffer += padding;
    }
    if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder,
                                                  DXVA2_BitStreamDateBufferType)))
        return -1;
    if (i < ctx_pic->slice_count)
        return -1;

    memset(bs, 0, sizeof(*bs));
    bs->CompressedBufferType = DXVA2_BitStreamDateBufferType;
    bs->DataSize             = current - dxva_data;
    bs->NumMBsInBuffer       = mb_count;

    if (is_slice_short(ctx)) {
        slice_data = ctx_pic->slice_short;
        slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short);
    } else {
        slice_data = ctx_pic->slice_long;
        slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_long);
    }
    assert((bs->DataSize & 127) == 0);
    return ff_dxva2_commit_buffer(avctx, ctx, sc,
                                  DXVA2_SliceControlBufferType,
                                  slice_data, slice_size, mb_count);
}


static int dxva2_h264_start_frame(AVCodecContext *avctx,
                                  av_unused const uint8_t *buffer,
                                  av_unused uint32_t size)
{
    const H264Context *h = avctx->priv_data;
    struct dxva_context *ctx = avctx->hwaccel_context;
    struct dxva2_picture_context *ctx_pic = h->cur_pic_ptr->hwaccel_picture_private;

    if (!ctx->decoder || !ctx->cfg || ctx->surface_count <= 0)
        return -1;
    assert(ctx_pic);

    /* Fill up DXVA_PicParams_H264 */
    fill_picture_parameters(ctx, h, &ctx_pic->pp);

    /* Fill up DXVA_Qmatrix_H264 */
    fill_scaling_lists(ctx, h, &ctx_pic->qm);

    ctx_pic->slice_count    = 0;
    ctx_pic->bitstream_size = 0;
    ctx_pic->bitstream      = NULL;
    return 0;
}

static int dxva2_h264_decode_slice(AVCodecContext *avctx,
                                   const uint8_t *buffer,
                                   uint32_t size)
{
    const H264Context *h = avctx->priv_data;
    const H264SliceContext *sl = &h->slice_ctx[0];
    struct dxva_context *ctx = avctx->hwaccel_context;
    const H264Picture *current_picture = h->cur_pic_ptr;
    struct dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
    unsigned position;

    if (ctx_pic->slice_count >= MAX_SLICES)
        return -1;

    if (!ctx_pic->bitstream)
        ctx_pic->bitstream = buffer;
    ctx_pic->bitstream_size += size;

    position = buffer - ctx_pic->bitstream;
    if (is_slice_short(ctx))
        fill_slice_short(&ctx_pic->slice_short[ctx_pic->slice_count],
                         position, size);
    else
        fill_slice_long(avctx, &ctx_pic->slice_long[ctx_pic->slice_count],
                        &ctx_pic->pp, position, size);
    ctx_pic->slice_count++;

    if (sl->slice_type != AV_PICTURE_TYPE_I && sl->slice_type != AV_PICTURE_TYPE_SI)
        ctx_pic->pp.wBitFields &= ~(1 << 15); /* Set IntraPicFlag to 0 */
    return 0;
}

static int dxva2_h264_end_frame(AVCodecContext *avctx)
{
    H264Context *h = avctx->priv_data;
    struct dxva2_picture_context *ctx_pic =
        h->cur_pic_ptr->hwaccel_picture_private;
    int ret;

    if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
        return -1;
    ret = ff_dxva2_common_end_frame(avctx, &h->cur_pic_ptr->f,
                                    &ctx_pic->pp, sizeof(ctx_pic->pp),
                                    &ctx_pic->qm, sizeof(ctx_pic->qm),
                                    commit_bitstream_and_slice_buffer);
    if (!ret)
        ff_h264_draw_horiz_band(h, 0, h->avctx->height);
    return ret;
}

AVHWAccel ff_h264_dxva2_hwaccel = {
    .name           = "h264_dxva2",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_H264,
    .pix_fmt        = AV_PIX_FMT_DXVA2_VLD,
    .start_frame    = dxva2_h264_start_frame,
    .decode_slice   = dxva2_h264_decode_slice,
    .end_frame      = dxva2_h264_end_frame,
    .frame_priv_data_size = sizeof(struct dxva2_picture_context),
};