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ffmpeg/libavcodec/dxva2_mpeg2.c
Rainer Hochecker b66382101c dxva2: Increase maximum number of slices for mpeg2 
Some content requires an higher number of slices in order to
render properly.

Rise the number to 1024 and warn if ever it exceeds.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
2014-03-06 19:28:20 +01:00

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/*
* MPEG-2 HW acceleration.
*
* copyright (c) 2010 Laurent Aimar
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; 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"
#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);
pp->wDeblockedPictureIndex = 0;
if (s->pict_type != AV_PICTURE_TYPE_I)
pp->wForwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, &s->last_picture);
else
pp->wForwardRefPictureIndex = 0xffff;
if (s->pict_type == AV_PICTURE_TYPE_B)
pp->wBackwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, &s->next_picture);
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->dsp.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);
while (get_bits1(&gb))
skip_bits(&gb, 8);
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);
uint8_t *dxva_data, *current, *end;
unsigned dxva_size;
unsigned i;
if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder,
DXVA2_BitStreamDateBufferType,
&dxva_data, &dxva_size)))
return -1;
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,
&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,
.priv_data_size = sizeof(struct dxva2_picture_context),
};
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