[deb_ffmpeg.git] / ffmpeg / libavcodec / dxva2_mpeg2.c

/*
 * MPEG-2 HW acceleration.
 *
 * copyright (c) 2010 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 "libavutil/log.h"
#include "dxva2_internal.h"
#include "mpegutils.h"

#define MAX_SLICES 1024
struct dxva2_picture_context {
    DXVA_PictureParameters pp;
    DXVA_QmatrixData       qm;
    unsigned               slice_count;
    DXVA_SliceInfo         slice[MAX_SLICES];

    const uint8_t          *bitstream;
    unsigned               bitstream_size;
};

static void fill_picture_parameters(AVCodecContext *avctx,
                                    struct dxva_context *ctx,
                                    const struct MpegEncContext *s,
                                    DXVA_PictureParameters *pp)
{
    const Picture *current_picture = s->current_picture_ptr;
    int is_field = s->picture_structure != PICT_FRAME;

    memset(pp, 0, sizeof(*pp));
    pp->wDecodedPictureIndex         = ff_dxva2_get_surface_index(ctx, current_picture->f);
    pp->wDeblockedPictureIndex       = 0;
    if (s->pict_type != AV_PICTURE_TYPE_I)
        pp->wForwardRefPictureIndex  = ff_dxva2_get_surface_index(ctx, s->last_picture.f);
    else
        pp->wForwardRefPictureIndex  = 0xffff;
    if (s->pict_type == AV_PICTURE_TYPE_B)
        pp->wBackwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, s->next_picture.f);
    else
        pp->wBackwardRefPictureIndex = 0xffff;
    pp->wPicWidthInMBminus1          = s->mb_width  - 1;
    pp->wPicHeightInMBminus1         = (s->mb_height >> is_field) - 1;
    pp->bMacroblockWidthMinus1       = 15;
    pp->bMacroblockHeightMinus1      = 15;
    pp->bBlockWidthMinus1            = 7;
    pp->bBlockHeightMinus1           = 7;
    pp->bBPPminus1                   = 7;
    pp->bPicStructure                = s->picture_structure;
    pp->bSecondField                 = is_field && !s->first_field;
    pp->bPicIntra                    = s->pict_type == AV_PICTURE_TYPE_I;
    pp->bPicBackwardPrediction       = s->pict_type == AV_PICTURE_TYPE_B;
    pp->bBidirectionalAveragingMode  = 0;
    pp->bMVprecisionAndChromaRelation= 0; /* FIXME */
    pp->bChromaFormat                = s->chroma_format;
    pp->bPicScanFixed                = 1;
    pp->bPicScanMethod               = s->alternate_scan ? 1 : 0;
    pp->bPicReadbackRequests         = 0;
    pp->bRcontrol                    = 0;
    pp->bPicSpatialResid8            = 0;
    pp->bPicOverflowBlocks           = 0;
    pp->bPicExtrapolation            = 0;
    pp->bPicDeblocked                = 0;
    pp->bPicDeblockConfined          = 0;
    pp->bPic4MVallowed               = 0;
    pp->bPicOBMC                     = 0;
    pp->bPicBinPB                    = 0;
    pp->bMV_RPS                      = 0;
    pp->bReservedBits                = 0;
    pp->wBitstreamFcodes             = (s->mpeg_f_code[0][0] << 12) |
                                       (s->mpeg_f_code[0][1] <<  8) |
                                       (s->mpeg_f_code[1][0] <<  4) |
                                       (s->mpeg_f_code[1][1]      );
    pp->wBitstreamPCEelements        = (s->intra_dc_precision         << 14) |
                                       (s->picture_structure          << 12) |
                                       (s->top_field_first            << 11) |
                                       (s->frame_pred_frame_dct       << 10) |
                                       (s->concealment_motion_vectors <<  9) |
                                       (s->q_scale_type               <<  8) |
                                       (s->intra_vlc_format           <<  7) |
                                       (s->alternate_scan             <<  6) |
                                       (s->repeat_first_field         <<  5) |
                                       (s->chroma_420_type            <<  4) |
                                       (s->progressive_frame          <<  3);
    pp->bBitstreamConcealmentNeed    = 0;
    pp->bBitstreamConcealmentMethod  = 0;
}

static void fill_quantization_matrices(AVCodecContext *avctx,
                                       struct dxva_context *ctx,
                                       const struct MpegEncContext *s,
                                       DXVA_QmatrixData *qm)
{
    int i;
    for (i = 0; i < 4; i++)
        qm->bNewQmatrix[i] = 1;
    for (i = 0; i < 64; i++) {
        int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
        qm->Qmatrix[0][i] = s->intra_matrix[n];
        qm->Qmatrix[1][i] = s->inter_matrix[n];
        qm->Qmatrix[2][i] = s->chroma_intra_matrix[n];
        qm->Qmatrix[3][i] = s->chroma_inter_matrix[n];
    }
}

static void fill_slice(AVCodecContext *avctx,
                       const struct MpegEncContext *s,
                       DXVA_SliceInfo *slice,
                       unsigned position,
                       const uint8_t *buffer, unsigned size)
{
    int is_field = s->picture_structure != PICT_FRAME;
    GetBitContext gb;

    memset(slice, 0, sizeof(*slice));
    slice->wHorizontalPosition = s->mb_x;
    slice->wVerticalPosition   = s->mb_y >> is_field;
    slice->dwSliceBitsInBuffer = 8 * size;
    slice->dwSliceDataLocation = position;
    slice->bStartCodeBitOffset = 0;
    slice->bReservedBits       = 0;
    /* XXX We store the index of the first MB and it will be fixed later */
    slice->wNumberMBsInSlice   = (s->mb_y >> is_field) * s->mb_width + s->mb_x;
    slice->wBadSliceChopping   = 0;

    init_get_bits(&gb, &buffer[4], 8 * (size - 4));

    slice->wQuantizerScaleCode = get_bits(&gb, 5);
    skip_1stop_8data_bits(&gb);

    slice->wMBbitOffset        = 4 * 8 + get_bits_count(&gb);
}
static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
                                             DXVA2_DecodeBufferDesc *bs,
                                             DXVA2_DecodeBufferDesc *sc)
{
    const struct MpegEncContext *s = avctx->priv_data;
    struct dxva_context *ctx = avctx->hwaccel_context;
    struct dxva2_picture_context *ctx_pic =
        s->current_picture_ptr->hwaccel_picture_private;
    const int is_field = s->picture_structure != PICT_FRAME;
    const unsigned mb_count = s->mb_width * (s->mb_height >> is_field);
    void     *dxva_data_ptr;
    uint8_t  *dxva_data, *current, *end;
    unsigned dxva_size;
    unsigned i;

    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++) {
        DXVA_SliceInfo *slice = &ctx_pic->slice[i];
        unsigned position = slice->dwSliceDataLocation;
        unsigned size     = slice->dwSliceBitsInBuffer / 8;
        if (size > end - current) {
            av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
            break;
        }
        slice->dwSliceDataLocation = current - dxva_data;

        if (i < ctx_pic->slice_count - 1)
            slice->wNumberMBsInSlice =
                slice[1].wNumberMBsInSlice - slice[0].wNumberMBsInSlice;
        else
            slice->wNumberMBsInSlice =
                mb_count - slice[0].wNumberMBsInSlice;

        memcpy(current, &ctx_pic->bitstream[position], size);
        current += size;
    }
    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;

    return ff_dxva2_commit_buffer(avctx, ctx, sc,
                                  DXVA2_SliceControlBufferType,
                                  ctx_pic->slice,
                                  ctx_pic->slice_count * sizeof(*ctx_pic->slice),
                                  mb_count);
}

static int dxva2_mpeg2_start_frame(AVCodecContext *avctx,
                                   av_unused const uint8_t *buffer,
                                   av_unused uint32_t size)
{
    const struct MpegEncContext *s = avctx->priv_data;
    struct dxva_context *ctx = avctx->hwaccel_context;
    struct dxva2_picture_context *ctx_pic =
        s->current_picture_ptr->hwaccel_picture_private;

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

    fill_picture_parameters(avctx, ctx, s, &ctx_pic->pp);
    fill_quantization_matrices(avctx, ctx, s, &ctx_pic->qm);

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

static int dxva2_mpeg2_decode_slice(AVCodecContext *avctx,
                                    const uint8_t *buffer, uint32_t size)
{
    const struct MpegEncContext *s = avctx->priv_data;
    struct dxva2_picture_context *ctx_pic =
        s->current_picture_ptr->hwaccel_picture_private;
    unsigned position;

    if (ctx_pic->slice_count >= MAX_SLICES) {
        avpriv_request_sample(avctx, "%d slices in dxva2",
                              ctx_pic->slice_count);
        return -1;
    }
    if (!ctx_pic->bitstream)
        ctx_pic->bitstream = buffer;
    ctx_pic->bitstream_size += size;

    position = buffer - ctx_pic->bitstream;
    fill_slice(avctx, s, &ctx_pic->slice[ctx_pic->slice_count++], position,
               buffer, size);
    return 0;
}

static int dxva2_mpeg2_end_frame(AVCodecContext *avctx)
{
    struct MpegEncContext *s = avctx->priv_data;
    struct dxva2_picture_context *ctx_pic =
        s->current_picture_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, s->current_picture_ptr->f,
                                    &ctx_pic->pp, sizeof(ctx_pic->pp),
                                    &ctx_pic->qm, sizeof(ctx_pic->qm),
                                    commit_bitstream_and_slice_buffer);
    if (!ret)
        ff_mpeg_draw_horiz_band(s, 0, avctx->height);
    return ret;
}

AVHWAccel ff_mpeg2_dxva2_hwaccel = {
    .name           = "mpeg2_dxva2",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_MPEG2VIDEO,
    .pix_fmt        = AV_PIX_FMT_DXVA2_VLD,
    .start_frame    = dxva2_mpeg2_start_frame,
    .decode_slice   = dxva2_mpeg2_decode_slice,
    .end_frame      = dxva2_mpeg2_end_frame,
    .frame_priv_data_size = sizeof(struct dxva2_picture_context),
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* MPEG-2 HW acceleration.
	3	*
	4	* copyright (c) 2010 Laurent Aimar
	5	*
	6	* This file is part of FFmpeg.
	7	*
	8	* FFmpeg 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	* FFmpeg 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 FFmpeg; if not, write to the Free Software
	20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	21	*/
	22
	23	#include "libavutil/log.h"
	24	#include "dxva2_internal.h"
	25	#include "mpegutils.h"
	26
	27	#define MAX_SLICES 1024
	28	struct dxva2_picture_context {
	29	DXVA_PictureParameters pp;
	30	DXVA_QmatrixData qm;
	31	unsigned slice_count;
	32	DXVA_SliceInfo slice[MAX_SLICES];
	33
	34	const uint8_t *bitstream;
	35	unsigned bitstream_size;
	36	};
	37
	38	static void fill_picture_parameters(AVCodecContext *avctx,
	39	struct dxva_context *ctx,
	40	const struct MpegEncContext *s,
	41	DXVA_PictureParameters *pp)
	42	{
	43	const Picture *current_picture = s->current_picture_ptr;
	44	int is_field = s->picture_structure != PICT_FRAME;
	45
	46	memset(pp, 0, sizeof(*pp));
	47	pp->wDecodedPictureIndex = ff_dxva2_get_surface_index(ctx, current_picture->f);
	48	pp->wDeblockedPictureIndex = 0;
	49	if (s->pict_type != AV_PICTURE_TYPE_I)
	50	pp->wForwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, s->last_picture.f);
	51	else
	52	pp->wForwardRefPictureIndex = 0xffff;
	53	if (s->pict_type == AV_PICTURE_TYPE_B)
	54	pp->wBackwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, s->next_picture.f);
	55	else
	56	pp->wBackwardRefPictureIndex = 0xffff;
	57	pp->wPicWidthInMBminus1 = s->mb_width - 1;
	58	pp->wPicHeightInMBminus1 = (s->mb_height >> is_field) - 1;
	59	pp->bMacroblockWidthMinus1 = 15;
	60	pp->bMacroblockHeightMinus1 = 15;
	61	pp->bBlockWidthMinus1 = 7;
	62	pp->bBlockHeightMinus1 = 7;
	63	pp->bBPPminus1 = 7;
	64	pp->bPicStructure = s->picture_structure;
65	pp->bSecondField = is_field && !s->first_field;
66	pp->bPicIntra = s->pict_type == AV_PICTURE_TYPE_I;
67	pp->bPicBackwardPrediction = s->pict_type == AV_PICTURE_TYPE_B;
68	pp->bBidirectionalAveragingMode = 0;
69	pp->bMVprecisionAndChromaRelation= 0; /* FIXME */
70	pp->bChromaFormat = s->chroma_format;
71	pp->bPicScanFixed = 1;
72	pp->bPicScanMethod = s->alternate_scan ? 1 : 0;
73	pp->bPicReadbackRequests = 0;
74	pp->bRcontrol = 0;
75	pp->bPicSpatialResid8 = 0;
76	pp->bPicOverflowBlocks = 0;
77	pp->bPicExtrapolation = 0;
78	pp->bPicDeblocked = 0;
79	pp->bPicDeblockConfined = 0;
80	pp->bPic4MVallowed = 0;
81	pp->bPicOBMC = 0;
82	pp->bPicBinPB = 0;
83	pp->bMV_RPS = 0;
84	pp->bReservedBits = 0;
85	pp->wBitstreamFcodes = (s->mpeg_f_code[0][0] << 12) \|
86	(s->mpeg_f_code[0][1] << 8) \|
87	(s->mpeg_f_code[1][0] << 4) \|
88	(s->mpeg_f_code[1][1] );
89	pp->wBitstreamPCEelements = (s->intra_dc_precision << 14) \|
90	(s->picture_structure << 12) \|
91	(s->top_field_first << 11) \|
92	(s->frame_pred_frame_dct << 10) \|
93	(s->concealment_motion_vectors << 9) \|
94	(s->q_scale_type << 8) \|
95	(s->intra_vlc_format << 7) \|
96	(s->alternate_scan << 6) \|
97	(s->repeat_first_field << 5) \|
98	(s->chroma_420_type << 4) \|
99	(s->progressive_frame << 3);
100	pp->bBitstreamConcealmentNeed = 0;
101	pp->bBitstreamConcealmentMethod = 0;
102	}
103
104	static void fill_quantization_matrices(AVCodecContext *avctx,
105	struct dxva_context *ctx,
106	const struct MpegEncContext *s,
107	DXVA_QmatrixData *qm)
108	{
109	int i;
110	for (i = 0; i < 4; i++)
111	qm->bNewQmatrix[i] = 1;
112	for (i = 0; i < 64; i++) {
113	int n = s->idsp.idct_permutation[ff_zigzag_direct[i]];
114	qm->Qmatrix[0][i] = s->intra_matrix[n];
115	qm->Qmatrix[1][i] = s->inter_matrix[n];
116	qm->Qmatrix[2][i] = s->chroma_intra_matrix[n];
117	qm->Qmatrix[3][i] = s->chroma_inter_matrix[n];
118	}
119	}
120
121	static void fill_slice(AVCodecContext *avctx,
122	const struct MpegEncContext *s,
123	DXVA_SliceInfo *slice,
124	unsigned position,
125	const uint8_t *buffer, unsigned size)
126	{
127	int is_field = s->picture_structure != PICT_FRAME;
128	GetBitContext gb;
129
130	memset(slice, 0, sizeof(*slice));
131	slice->wHorizontalPosition = s->mb_x;
132	slice->wVerticalPosition = s->mb_y >> is_field;
133	slice->dwSliceBitsInBuffer = 8 * size;
134	slice->dwSliceDataLocation = position;
135	slice->bStartCodeBitOffset = 0;
136	slice->bReservedBits = 0;
137	/* XXX We store the index of the first MB and it will be fixed later */
138	slice->wNumberMBsInSlice = (s->mb_y >> is_field) * s->mb_width + s->mb_x;
139	slice->wBadSliceChopping = 0;
140
141	init_get_bits(&gb, &buffer[4], 8 * (size - 4));
142
143	slice->wQuantizerScaleCode = get_bits(&gb, 5);
144	skip_1stop_8data_bits(&gb);
145
146	slice->wMBbitOffset = 4 * 8 + get_bits_count(&gb);
147	}
148	static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
149	DXVA2_DecodeBufferDesc *bs,
150	DXVA2_DecodeBufferDesc *sc)
151	{
152	const struct MpegEncContext *s = avctx->priv_data;
153	struct dxva_context *ctx = avctx->hwaccel_context;
154	struct dxva2_picture_context *ctx_pic =
155	s->current_picture_ptr->hwaccel_picture_private;
156	const int is_field = s->picture_structure != PICT_FRAME;
157	const unsigned mb_count = s->mb_width * (s->mb_height >> is_field);
158	void *dxva_data_ptr;
159	uint8_t dxva_data, current, *end;
160	unsigned dxva_size;
161	unsigned i;
162
163	if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder,
164	DXVA2_BitStreamDateBufferType,
165	&dxva_data_ptr, &dxva_size)))
166	return -1;
167
168	dxva_data = dxva_data_ptr;
169	current = dxva_data;
170	end = dxva_data + dxva_size;
171
172	for (i = 0; i < ctx_pic->slice_count; i++) {
173	DXVA_SliceInfo *slice = &ctx_pic->slice[i];
174	unsigned position = slice->dwSliceDataLocation;
175	unsigned size = slice->dwSliceBitsInBuffer / 8;
176	if (size > end - current) {
177	av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
178	break;
179	}
180	slice->dwSliceDataLocation = current - dxva_data;
181
182	if (i < ctx_pic->slice_count - 1)
183	slice->wNumberMBsInSlice =
184	slice[1].wNumberMBsInSlice - slice[0].wNumberMBsInSlice;
185	else
186	slice->wNumberMBsInSlice =
187	mb_count - slice[0].wNumberMBsInSlice;
188
189	memcpy(current, &ctx_pic->bitstream[position], size);
190	current += size;
191	}
192	if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder,
193	DXVA2_BitStreamDateBufferType)))
194	return -1;
195	if (i < ctx_pic->slice_count)
196	return -1;
197
198	memset(bs, 0, sizeof(*bs));
199	bs->CompressedBufferType = DXVA2_BitStreamDateBufferType;
200	bs->DataSize = current - dxva_data;
201	bs->NumMBsInBuffer = mb_count;
202
203	return ff_dxva2_commit_buffer(avctx, ctx, sc,
204	DXVA2_SliceControlBufferType,
205	ctx_pic->slice,
206	ctx_pic->slice_count * sizeof(*ctx_pic->slice),
207	mb_count);
208	}
209
210	static int dxva2_mpeg2_start_frame(AVCodecContext *avctx,
211	av_unused const uint8_t *buffer,
212	av_unused uint32_t size)
213	{
214	const struct MpegEncContext *s = avctx->priv_data;
215	struct dxva_context *ctx = avctx->hwaccel_context;
216	struct dxva2_picture_context *ctx_pic =
217	s->current_picture_ptr->hwaccel_picture_private;
218
219	if (!ctx->decoder \|\| !ctx->cfg \|\| ctx->surface_count <= 0)
220	return -1;
221	assert(ctx_pic);
222
223	fill_picture_parameters(avctx, ctx, s, &ctx_pic->pp);
224	fill_quantization_matrices(avctx, ctx, s, &ctx_pic->qm);
225
226	ctx_pic->slice_count = 0;
227	ctx_pic->bitstream_size = 0;
228	ctx_pic->bitstream = NULL;
229	return 0;
230	}
231
232	static int dxva2_mpeg2_decode_slice(AVCodecContext *avctx,
233	const uint8_t *buffer, uint32_t size)
234	{
235	const struct MpegEncContext *s = avctx->priv_data;
236	struct dxva2_picture_context *ctx_pic =
237	s->current_picture_ptr->hwaccel_picture_private;
238	unsigned position;
239
240	if (ctx_pic->slice_count >= MAX_SLICES) {
241	avpriv_request_sample(avctx, "%d slices in dxva2",
242	ctx_pic->slice_count);
243	return -1;
244	}
245	if (!ctx_pic->bitstream)
246	ctx_pic->bitstream = buffer;
247	ctx_pic->bitstream_size += size;
248
249	position = buffer - ctx_pic->bitstream;
250	fill_slice(avctx, s, &ctx_pic->slice[ctx_pic->slice_count++], position,
251	buffer, size);
252	return 0;
253	}
254
255	static int dxva2_mpeg2_end_frame(AVCodecContext *avctx)
256	{
257	struct MpegEncContext *s = avctx->priv_data;
258	struct dxva2_picture_context *ctx_pic =
259	s->current_picture_ptr->hwaccel_picture_private;
260	int ret;
261
262	if (ctx_pic->slice_count <= 0 \|\| ctx_pic->bitstream_size <= 0)
263	return -1;
264	ret = ff_dxva2_common_end_frame(avctx, s->current_picture_ptr->f,
265	&ctx_pic->pp, sizeof(ctx_pic->pp),
266	&ctx_pic->qm, sizeof(ctx_pic->qm),
267	commit_bitstream_and_slice_buffer);
268	if (!ret)
269	ff_mpeg_draw_horiz_band(s, 0, avctx->height);
270	return ret;
271	}
272
273	AVHWAccel ff_mpeg2_dxva2_hwaccel = {
274	.name = "mpeg2_dxva2",
275	.type = AVMEDIA_TYPE_VIDEO,
276	.id = AV_CODEC_ID_MPEG2VIDEO,
277	.pix_fmt = AV_PIX_FMT_DXVA2_VLD,
278	.start_frame = dxva2_mpeg2_start_frame,
279	.decode_slice = dxva2_mpeg2_decode_slice,
280	.end_frame = dxva2_mpeg2_end_frame,
281	.frame_priv_data_size = sizeof(struct dxva2_picture_context),
282	};