[deb_ffmpeg.git] / ffmpeg / libavcodec / dxva2_vc1.c

/*
 * DXVA2 WMV3/VC-1 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 "dxva2_internal.h"
#include "mpegutils.h"
#include "vc1.h"
#include "vc1data.h"

struct dxva2_picture_context {
    DXVA_PictureParameters pp;
    DXVA_SliceInfo         si;

    const uint8_t          *bitstream;
    unsigned               bitstream_size;
};

static void fill_picture_parameters(AVCodecContext *avctx,
                                    struct dxva_context *ctx, const VC1Context *v,
                                    DXVA_PictureParameters *pp)
{
    const MpegEncContext *s = &v->s;
    const Picture *current_picture = s->current_picture_ptr;
    int intcomp = 0;

    // determine if intensity compensation is needed
    if (s->pict_type == AV_PICTURE_TYPE_P) {
      if ((v->fcm == ILACE_FRAME && v->intcomp) || (v->fcm != ILACE_FRAME && v->mv_mode == MV_PMODE_INTENSITY_COMP)) {
        if (v->lumscale != 32 || v->lumshift != 0 || (s->picture_structure != PICT_FRAME && (v->lumscale2 != 32 || v->lumshift2 != 0)))
          intcomp = 1;
      }
    }

    memset(pp, 0, sizeof(*pp));
    pp->wDecodedPictureIndex    =
    pp->wDeblockedPictureIndex  = ff_dxva2_get_surface_index(ctx, current_picture->f);
    if (s->pict_type != AV_PICTURE_TYPE_I && !v->bi_type)
        pp->wForwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, s->last_picture.f);
    else
        pp->wForwardRefPictureIndex = 0xffff;
    if (s->pict_type == AV_PICTURE_TYPE_B && !v->bi_type)
        pp->wBackwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, s->next_picture.f);
    else
        pp->wBackwardRefPictureIndex = 0xffff;
    if (v->profile == PROFILE_ADVANCED) {
        /* It is the cropped width/height -1 of the frame */
        pp->wPicWidthInMBminus1 = avctx->width  - 1;
        pp->wPicHeightInMBminus1= avctx->height - 1;
    } else {
        /* It is the coded width/height in macroblock -1 of the frame */
        pp->wPicWidthInMBminus1 = s->mb_width  - 1;
        pp->wPicHeightInMBminus1= s->mb_height - 1;
    }
    pp->bMacroblockWidthMinus1  = 15;
    pp->bMacroblockHeightMinus1 = 15;
    pp->bBlockWidthMinus1       = 7;
    pp->bBlockHeightMinus1      = 7;
    pp->bBPPminus1              = 7;
    if (s->picture_structure & PICT_TOP_FIELD)
        pp->bPicStructure      |= 0x01;
    if (s->picture_structure & PICT_BOTTOM_FIELD)
        pp->bPicStructure      |= 0x02;
    pp->bSecondField            = v->interlace && v->fcm == ILACE_FIELD && v->second_field;
    pp->bPicIntra               = s->pict_type == AV_PICTURE_TYPE_I || v->bi_type;
    pp->bPicBackwardPrediction  = s->pict_type == AV_PICTURE_TYPE_B && !v->bi_type;
    pp->bBidirectionalAveragingMode = (1                                           << 7) |
                                      ((ctx->cfg->ConfigIntraResidUnsigned != 0)   << 6) |
                                      ((ctx->cfg->ConfigResidDiffAccelerator != 0) << 5) |
                                      (intcomp                                     << 4) |
                                      ((v->profile == PROFILE_ADVANCED)            << 3);
    pp->bMVprecisionAndChromaRelation = ((v->mv_mode == MV_PMODE_1MV_HPEL_BILIN) << 3) |
                                        (1                                       << 2) |
                                        (0                                       << 1) |
                                        (!s->quarter_sample                          );
    pp->bChromaFormat           = v->chromaformat;
    ctx->report_id++;
    if (ctx->report_id >= (1 << 16))
        ctx->report_id = 1;
    pp->bPicScanFixed           = ctx->report_id >> 8;
    pp->bPicScanMethod          = ctx->report_id & 0xff;
    pp->bPicReadbackRequests    = 0;
    pp->bRcontrol               = v->rnd;
    pp->bPicSpatialResid8       = (v->panscanflag  << 7) |
                                  (v->refdist_flag << 6) |
                                  (s->loop_filter  << 5) |
                                  (v->fastuvmc     << 4) |
                                  (v->extended_mv  << 3) |
                                  (v->dquant       << 1) |
                                  (v->vstransform      );
    pp->bPicOverflowBlocks      = (v->quantizer_mode << 6) |
                                  (v->multires       << 5) |
                                  (v->resync_marker  << 4) |
                                  (v->rangered       << 3) |
                                  (s->max_b_frames       );
    pp->bPicExtrapolation       = (!v->interlace || v->fcm == PROGRESSIVE) ? 1 : 2;
    pp->bPicDeblocked           = ((!pp->bPicBackwardPrediction && v->overlap)        << 6) |
                                  ((v->profile != PROFILE_ADVANCED && v->rangeredfrm) << 5) |
                                  (s->loop_filter                                     << 1);
    pp->bPicDeblockConfined     = (v->postprocflag             << 7) |
                                  (v->broadcast                << 6) |
                                  (v->interlace                << 5) |
                                  (v->tfcntrflag               << 4) |
                                  (v->finterpflag              << 3) |
                                  ((s->pict_type != AV_PICTURE_TYPE_B) << 2) |
                                  (v->psf                      << 1) |
                                  (v->extended_dmv                 );
    if (s->pict_type != AV_PICTURE_TYPE_I)
        pp->bPic4MVallowed      = v->mv_mode == MV_PMODE_MIXED_MV ||
                                  (v->mv_mode == MV_PMODE_INTENSITY_COMP &&
                                   v->mv_mode2 == MV_PMODE_MIXED_MV);
    if (v->profile == PROFILE_ADVANCED)
        pp->bPicOBMC            = (v->range_mapy_flag  << 7) |
                                  (v->range_mapy       << 4) |
                                  (v->range_mapuv_flag << 3) |
                                  (v->range_mapuv          );
    pp->bPicBinPB               = 0;
    pp->bMV_RPS                 = (v->fcm == ILACE_FIELD && pp->bPicBackwardPrediction) ? v->refdist + 9 : 0;
    pp->bReservedBits           = v->pq;
    if (s->picture_structure == PICT_FRAME) {
        if (intcomp) {
            pp->wBitstreamFcodes      = v->lumscale;
            pp->wBitstreamPCEelements = v->lumshift;
        } else {
            pp->wBitstreamFcodes      = 32;
            pp->wBitstreamPCEelements = 0;
        }
    } else {
        /* Syntax: (top_field_param << 8) | bottom_field_param */
        if (intcomp) {
            pp->wBitstreamFcodes      = (v->lumscale << 8) | v->lumscale2;
            pp->wBitstreamPCEelements = (v->lumshift << 8) | v->lumshift2;
        } else {
            pp->wBitstreamFcodes      = (32 << 8) | 32;
            pp->wBitstreamPCEelements = 0;
        }
    }
    pp->bBitstreamConcealmentNeed   = 0;
    pp->bBitstreamConcealmentMethod = 0;
}

static void fill_slice(AVCodecContext *avctx, DXVA_SliceInfo *slice,
                       unsigned position, unsigned size)
{
    const VC1Context *v = avctx->priv_data;
    const MpegEncContext *s = &v->s;

    memset(slice, 0, sizeof(*slice));
    slice->wHorizontalPosition = 0;
    slice->wVerticalPosition   = s->mb_y;
    slice->dwSliceBitsInBuffer = 8 * size;
    slice->dwSliceDataLocation = position;
    slice->bStartCodeBitOffset = 0;
    slice->bReservedBits       = (s->pict_type == AV_PICTURE_TYPE_B && !v->bi_type) ? v->bfraction_lut_index + 9 : 0;
    slice->wMBbitOffset        = v->p_frame_skipped ? 0xffff : get_bits_count(&s->gb) + (avctx->codec_id == AV_CODEC_ID_VC1 ? 32 : 0);
    slice->wNumberMBsInSlice   = s->mb_width * s->mb_height; /* XXX We assume 1 slice */
    slice->wQuantizerScaleCode = v->pq;
    slice->wBadSliceChopping   = 0;
}

static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
                                             DXVA2_DecodeBufferDesc *bs,
                                             DXVA2_DecodeBufferDesc *sc)
{
    const VC1Context *v = avctx->priv_data;
    struct dxva_context *ctx = avctx->hwaccel_context;
    const MpegEncContext *s = &v->s;
    struct dxva2_picture_context *ctx_pic = s->current_picture_ptr->hwaccel_picture_private;

    DXVA_SliceInfo *slice = &ctx_pic->si;

    static const uint8_t start_code[] = { 0, 0, 1, 0x0d };
    const unsigned start_code_size = avctx->codec_id == AV_CODEC_ID_VC1 ? sizeof(start_code) : 0;
    const unsigned slice_size = slice->dwSliceBitsInBuffer / 8;
    const unsigned padding = 128 - ((start_code_size + slice_size) & 127);
    const unsigned data_size = start_code_size + slice_size + padding;

    void     *dxva_data_ptr;
    uint8_t  *dxva_data;
    unsigned dxva_size;
    int result;

    if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder,
                                              DXVA2_BitStreamDateBufferType,
                                              &dxva_data_ptr, &dxva_size)))
        return -1;

    dxva_data = dxva_data_ptr;
    result = data_size <= dxva_size ? 0 : -1;
    if (!result) {
        if (start_code_size > 0) {
            memcpy(dxva_data, start_code, start_code_size);
            if (v->second_field)
                dxva_data[3] = 0x0c;
        }
        memcpy(dxva_data + start_code_size,
               ctx_pic->bitstream + slice->dwSliceDataLocation, slice_size);
        if (padding > 0)
            memset(dxva_data + start_code_size + slice_size, 0, padding);
        slice->dwSliceBitsInBuffer = 8 * data_size;
    }
    if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder,
                                                  DXVA2_BitStreamDateBufferType)))
        return -1;
    if (result)
        return result;

    memset(bs, 0, sizeof(*bs));
    bs->CompressedBufferType = DXVA2_BitStreamDateBufferType;
    bs->DataSize             = data_size;
    bs->NumMBsInBuffer       = s->mb_width * s->mb_height;
    assert((bs->DataSize & 127) == 0);

    return ff_dxva2_commit_buffer(avctx, ctx, sc,
                                  DXVA2_SliceControlBufferType,
                                  slice, sizeof(*slice), bs->NumMBsInBuffer);
}

static int dxva2_vc1_start_frame(AVCodecContext *avctx,
                                 av_unused const uint8_t *buffer,
                                 av_unused uint32_t size)
{
    const VC1Context *v = avctx->priv_data;
    struct dxva_context *ctx = avctx->hwaccel_context;
    struct dxva2_picture_context *ctx_pic = v->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, v, &ctx_pic->pp);

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

static int dxva2_vc1_decode_slice(AVCodecContext *avctx,
                                  const uint8_t *buffer,
                                  uint32_t size)
{
    const VC1Context *v = avctx->priv_data;
    const Picture *current_picture = v->s.current_picture_ptr;
    struct dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;

    if (ctx_pic->bitstream_size > 0)
        return -1;

    if (avctx->codec_id == AV_CODEC_ID_VC1 &&
        size >= 4 && IS_MARKER(AV_RB32(buffer))) {
        buffer += 4;
        size   -= 4;
    }

    ctx_pic->bitstream_size = size;
    ctx_pic->bitstream      = buffer;

    fill_slice(avctx, &ctx_pic->si, 0, size);
    return 0;
}

static int dxva2_vc1_end_frame(AVCodecContext *avctx)
{
    VC1Context *v = avctx->priv_data;
    struct dxva2_picture_context *ctx_pic = v->s.current_picture_ptr->hwaccel_picture_private;
    int ret;

    if (ctx_pic->bitstream_size <= 0)
        return -1;

    ret = ff_dxva2_common_end_frame(avctx, v->s.current_picture_ptr->f,
                                    &ctx_pic->pp, sizeof(ctx_pic->pp),
                                    NULL, 0,
                                    commit_bitstream_and_slice_buffer);
    if (!ret)
        ff_mpeg_draw_horiz_band(&v->s, 0, avctx->height);
    return ret;
}

#if CONFIG_WMV3_DXVA2_HWACCEL
AVHWAccel ff_wmv3_dxva2_hwaccel = {
    .name           = "wmv3_dxva2",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_WMV3,
    .pix_fmt        = AV_PIX_FMT_DXVA2_VLD,
    .start_frame    = dxva2_vc1_start_frame,
    .decode_slice   = dxva2_vc1_decode_slice,
    .end_frame      = dxva2_vc1_end_frame,
    .frame_priv_data_size = sizeof(struct dxva2_picture_context),
};
#endif

AVHWAccel ff_vc1_dxva2_hwaccel = {
    .name           = "vc1_dxva2",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_VC1,
    .pix_fmt        = AV_PIX_FMT_DXVA2_VLD,
    .start_frame    = dxva2_vc1_start_frame,
    .decode_slice   = dxva2_vc1_decode_slice,
    .end_frame      = dxva2_vc1_end_frame,
    .frame_priv_data_size = sizeof(struct dxva2_picture_context),
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* DXVA2 WMV3/VC-1 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 "dxva2_internal.h"
	24	#include "mpegutils.h"
	25	#include "vc1.h"
	26	#include "vc1data.h"
	27
	28	struct dxva2_picture_context {
	29	DXVA_PictureParameters pp;
	30	DXVA_SliceInfo si;
	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, const VC1Context v,
	38	DXVA_PictureParameters *pp)
	39	{
	40	const MpegEncContext *s = &v->s;
	41	const Picture *current_picture = s->current_picture_ptr;
	42	int intcomp = 0;
	43
	44	// determine if intensity compensation is needed
	45	if (s->pict_type == AV_PICTURE_TYPE_P) {
	46	if ((v->fcm == ILACE_FRAME && v->intcomp) \|\| (v->fcm != ILACE_FRAME && v->mv_mode == MV_PMODE_INTENSITY_COMP)) {
	47	if (v->lumscale != 32 \|\| v->lumshift != 0 \|\| (s->picture_structure != PICT_FRAME && (v->lumscale2 != 32 \|\| v->lumshift2 != 0)))
	48	intcomp = 1;
	49	}
	50	}
	51
	52	memset(pp, 0, sizeof(*pp));
	53	pp->wDecodedPictureIndex =
	54	pp->wDeblockedPictureIndex = ff_dxva2_get_surface_index(ctx, current_picture->f);
	55	if (s->pict_type != AV_PICTURE_TYPE_I && !v->bi_type)
	56	pp->wForwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, s->last_picture.f);
	57	else
	58	pp->wForwardRefPictureIndex = 0xffff;
	59	if (s->pict_type == AV_PICTURE_TYPE_B && !v->bi_type)
	60	pp->wBackwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, s->next_picture.f);
	61	else
	62	pp->wBackwardRefPictureIndex = 0xffff;
	63	if (v->profile == PROFILE_ADVANCED) {
	64	/* It is the cropped width/height -1 of the frame */
65	pp->wPicWidthInMBminus1 = avctx->width - 1;
66	pp->wPicHeightInMBminus1= avctx->height - 1;
67	} else {
68	/* It is the coded width/height in macroblock -1 of the frame */
69	pp->wPicWidthInMBminus1 = s->mb_width - 1;
70	pp->wPicHeightInMBminus1= s->mb_height - 1;
71	}
72	pp->bMacroblockWidthMinus1 = 15;
73	pp->bMacroblockHeightMinus1 = 15;
74	pp->bBlockWidthMinus1 = 7;
75	pp->bBlockHeightMinus1 = 7;
76	pp->bBPPminus1 = 7;
77	if (s->picture_structure & PICT_TOP_FIELD)
78	pp->bPicStructure \|= 0x01;
79	if (s->picture_structure & PICT_BOTTOM_FIELD)
80	pp->bPicStructure \|= 0x02;
81	pp->bSecondField = v->interlace && v->fcm == ILACE_FIELD && v->second_field;
82	pp->bPicIntra = s->pict_type == AV_PICTURE_TYPE_I \|\| v->bi_type;
83	pp->bPicBackwardPrediction = s->pict_type == AV_PICTURE_TYPE_B && !v->bi_type;
84	pp->bBidirectionalAveragingMode = (1 << 7) \|
85	((ctx->cfg->ConfigIntraResidUnsigned != 0) << 6) \|
86	((ctx->cfg->ConfigResidDiffAccelerator != 0) << 5) \|
87	(intcomp << 4) \|
88	((v->profile == PROFILE_ADVANCED) << 3);
89	pp->bMVprecisionAndChromaRelation = ((v->mv_mode == MV_PMODE_1MV_HPEL_BILIN) << 3) \|
90	(1 << 2) \|
91	(0 << 1) \|
92	(!s->quarter_sample );
93	pp->bChromaFormat = v->chromaformat;
94	ctx->report_id++;
95	if (ctx->report_id >= (1 << 16))
96	ctx->report_id = 1;
97	pp->bPicScanFixed = ctx->report_id >> 8;
98	pp->bPicScanMethod = ctx->report_id & 0xff;
99	pp->bPicReadbackRequests = 0;
100	pp->bRcontrol = v->rnd;
101	pp->bPicSpatialResid8 = (v->panscanflag << 7) \|
102	(v->refdist_flag << 6) \|
103	(s->loop_filter << 5) \|
104	(v->fastuvmc << 4) \|
105	(v->extended_mv << 3) \|
106	(v->dquant << 1) \|
107	(v->vstransform );
108	pp->bPicOverflowBlocks = (v->quantizer_mode << 6) \|
109	(v->multires << 5) \|
110	(v->resync_marker << 4) \|
111	(v->rangered << 3) \|
112	(s->max_b_frames );
113	pp->bPicExtrapolation = (!v->interlace \|\| v->fcm == PROGRESSIVE) ? 1 : 2;
114	pp->bPicDeblocked = ((!pp->bPicBackwardPrediction && v->overlap) << 6) \|
115	((v->profile != PROFILE_ADVANCED && v->rangeredfrm) << 5) \|
116	(s->loop_filter << 1);
117	pp->bPicDeblockConfined = (v->postprocflag << 7) \|
118	(v->broadcast << 6) \|
119	(v->interlace << 5) \|
120	(v->tfcntrflag << 4) \|
121	(v->finterpflag << 3) \|
122	((s->pict_type != AV_PICTURE_TYPE_B) << 2) \|
123	(v->psf << 1) \|
124	(v->extended_dmv );
125	if (s->pict_type != AV_PICTURE_TYPE_I)
126	pp->bPic4MVallowed = v->mv_mode == MV_PMODE_MIXED_MV \|\|
127	(v->mv_mode == MV_PMODE_INTENSITY_COMP &&
128	v->mv_mode2 == MV_PMODE_MIXED_MV);
129	if (v->profile == PROFILE_ADVANCED)
130	pp->bPicOBMC = (v->range_mapy_flag << 7) \|
131	(v->range_mapy << 4) \|
132	(v->range_mapuv_flag << 3) \|
133	(v->range_mapuv );
134	pp->bPicBinPB = 0;
135	pp->bMV_RPS = (v->fcm == ILACE_FIELD && pp->bPicBackwardPrediction) ? v->refdist + 9 : 0;
136	pp->bReservedBits = v->pq;
137	if (s->picture_structure == PICT_FRAME) {
138	if (intcomp) {
139	pp->wBitstreamFcodes = v->lumscale;
140	pp->wBitstreamPCEelements = v->lumshift;
141	} else {
142	pp->wBitstreamFcodes = 32;
143	pp->wBitstreamPCEelements = 0;
144	}
145	} else {
146	/* Syntax: (top_field_param << 8) \| bottom_field_param */
147	if (intcomp) {
148	pp->wBitstreamFcodes = (v->lumscale << 8) \| v->lumscale2;
149	pp->wBitstreamPCEelements = (v->lumshift << 8) \| v->lumshift2;
150	} else {
151	pp->wBitstreamFcodes = (32 << 8) \| 32;
152	pp->wBitstreamPCEelements = 0;
153	}
154	}
155	pp->bBitstreamConcealmentNeed = 0;
156	pp->bBitstreamConcealmentMethod = 0;
157	}
158
159	static void fill_slice(AVCodecContext avctx, DXVA_SliceInfo slice,
160	unsigned position, unsigned size)
161	{
162	const VC1Context *v = avctx->priv_data;
163	const MpegEncContext *s = &v->s;
164
165	memset(slice, 0, sizeof(*slice));
166	slice->wHorizontalPosition = 0;
167	slice->wVerticalPosition = s->mb_y;
168	slice->dwSliceBitsInBuffer = 8 * size;
169	slice->dwSliceDataLocation = position;
170	slice->bStartCodeBitOffset = 0;
171	slice->bReservedBits = (s->pict_type == AV_PICTURE_TYPE_B && !v->bi_type) ? v->bfraction_lut_index + 9 : 0;
172	slice->wMBbitOffset = v->p_frame_skipped ? 0xffff : get_bits_count(&s->gb) + (avctx->codec_id == AV_CODEC_ID_VC1 ? 32 : 0);
173	slice->wNumberMBsInSlice = s->mb_width * s->mb_height; /* XXX We assume 1 slice */
174	slice->wQuantizerScaleCode = v->pq;
175	slice->wBadSliceChopping = 0;
176	}
177
178	static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
179	DXVA2_DecodeBufferDesc *bs,
180	DXVA2_DecodeBufferDesc *sc)
181	{
182	const VC1Context *v = avctx->priv_data;
183	struct dxva_context *ctx = avctx->hwaccel_context;
184	const MpegEncContext *s = &v->s;
185	struct dxva2_picture_context *ctx_pic = s->current_picture_ptr->hwaccel_picture_private;
186
187	DXVA_SliceInfo *slice = &ctx_pic->si;
188
189	static const uint8_t start_code[] = { 0, 0, 1, 0x0d };
190	const unsigned start_code_size = avctx->codec_id == AV_CODEC_ID_VC1 ? sizeof(start_code) : 0;
191	const unsigned slice_size = slice->dwSliceBitsInBuffer / 8;
192	const unsigned padding = 128 - ((start_code_size + slice_size) & 127);
193	const unsigned data_size = start_code_size + slice_size + padding;
194
195	void *dxva_data_ptr;
196	uint8_t *dxva_data;
197	unsigned dxva_size;
198	int result;
199
200	if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder,
201	DXVA2_BitStreamDateBufferType,
202	&dxva_data_ptr, &dxva_size)))
203	return -1;
204
205	dxva_data = dxva_data_ptr;
206	result = data_size <= dxva_size ? 0 : -1;
207	if (!result) {
208	if (start_code_size > 0) {
209	memcpy(dxva_data, start_code, start_code_size);
210	if (v->second_field)
211	dxva_data[3] = 0x0c;
212	}
213	memcpy(dxva_data + start_code_size,
214	ctx_pic->bitstream + slice->dwSliceDataLocation, slice_size);
215	if (padding > 0)
216	memset(dxva_data + start_code_size + slice_size, 0, padding);
217	slice->dwSliceBitsInBuffer = 8 * data_size;
218	}
219	if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder,
220	DXVA2_BitStreamDateBufferType)))
221	return -1;
222	if (result)
223	return result;
224
225	memset(bs, 0, sizeof(*bs));
226	bs->CompressedBufferType = DXVA2_BitStreamDateBufferType;
227	bs->DataSize = data_size;
228	bs->NumMBsInBuffer = s->mb_width * s->mb_height;
229	assert((bs->DataSize & 127) == 0);
230
231	return ff_dxva2_commit_buffer(avctx, ctx, sc,
232	DXVA2_SliceControlBufferType,
233	slice, sizeof(*slice), bs->NumMBsInBuffer);
234	}
235
236	static int dxva2_vc1_start_frame(AVCodecContext *avctx,
237	av_unused const uint8_t *buffer,
238	av_unused uint32_t size)
239	{
240	const VC1Context *v = avctx->priv_data;
241	struct dxva_context *ctx = avctx->hwaccel_context;
242	struct dxva2_picture_context *ctx_pic = v->s.current_picture_ptr->hwaccel_picture_private;
243
244	if (!ctx->decoder \|\| !ctx->cfg \|\| ctx->surface_count <= 0)
245	return -1;
246	assert(ctx_pic);
247
248	fill_picture_parameters(avctx, ctx, v, &ctx_pic->pp);
249
250	ctx_pic->bitstream_size = 0;
251	ctx_pic->bitstream = NULL;
252	return 0;
253	}
254
255	static int dxva2_vc1_decode_slice(AVCodecContext *avctx,
256	const uint8_t *buffer,
257	uint32_t size)
258	{
259	const VC1Context *v = avctx->priv_data;
260	const Picture *current_picture = v->s.current_picture_ptr;
261	struct dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
262
263	if (ctx_pic->bitstream_size > 0)
264	return -1;
265
266	if (avctx->codec_id == AV_CODEC_ID_VC1 &&
267	size >= 4 && IS_MARKER(AV_RB32(buffer))) {
268	buffer += 4;
269	size -= 4;
270	}
271
272	ctx_pic->bitstream_size = size;
273	ctx_pic->bitstream = buffer;
274
275	fill_slice(avctx, &ctx_pic->si, 0, size);
276	return 0;
277	}
278
279	static int dxva2_vc1_end_frame(AVCodecContext *avctx)
280	{
281	VC1Context *v = avctx->priv_data;
282	struct dxva2_picture_context *ctx_pic = v->s.current_picture_ptr->hwaccel_picture_private;
283	int ret;
284
285	if (ctx_pic->bitstream_size <= 0)
286	return -1;
287
288	ret = ff_dxva2_common_end_frame(avctx, v->s.current_picture_ptr->f,
289	&ctx_pic->pp, sizeof(ctx_pic->pp),
290	NULL, 0,
291	commit_bitstream_and_slice_buffer);
292	if (!ret)
293	ff_mpeg_draw_horiz_band(&v->s, 0, avctx->height);
294	return ret;
295	}
296
297	#if CONFIG_WMV3_DXVA2_HWACCEL
298	AVHWAccel ff_wmv3_dxva2_hwaccel = {
299	.name = "wmv3_dxva2",
300	.type = AVMEDIA_TYPE_VIDEO,
301	.id = AV_CODEC_ID_WMV3,
302	.pix_fmt = AV_PIX_FMT_DXVA2_VLD,
303	.start_frame = dxva2_vc1_start_frame,
304	.decode_slice = dxva2_vc1_decode_slice,
305	.end_frame = dxva2_vc1_end_frame,
306	.frame_priv_data_size = sizeof(struct dxva2_picture_context),
307	};
308	#endif
309
310	AVHWAccel ff_vc1_dxva2_hwaccel = {
311	.name = "vc1_dxva2",
312	.type = AVMEDIA_TYPE_VIDEO,
313	.id = AV_CODEC_ID_VC1,
314	.pix_fmt = AV_PIX_FMT_DXVA2_VLD,
315	.start_frame = dxva2_vc1_start_frame,
316	.decode_slice = dxva2_vc1_decode_slice,
317	.end_frame = dxva2_vc1_end_frame,
318	.frame_priv_data_size = sizeof(struct dxva2_picture_context),
319	};