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ffmpeg/libavcodec/dxva2_vc1.c

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/*
* 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 "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);
if (s->pict_type != AV_PICTURE_TYPE_I && !v->bi_type)
pp->wForwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, &s->last_picture);
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);
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);
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;
uint8_t *dxva_data;
unsigned dxva_size;
int result;
if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder,
DXVA2_BitStreamDateBufferType,
(void **)&dxva_data, &dxva_size)))
return -1;
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,
&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,
.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,
.priv_data_size = sizeof(struct dxva2_picture_context),
};
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