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279 lines
11 KiB
279 lines
11 KiB
/* |
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* MPEG-2 HW acceleration. |
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* |
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* copyright (c) 2010 Laurent Aimar |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/log.h" |
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#include "dxva2_internal.h" |
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#include "mpegutils.h" |
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#define MAX_SLICES 1024 |
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struct dxva2_picture_context { |
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DXVA_PictureParameters pp; |
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DXVA_QmatrixData qm; |
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unsigned slice_count; |
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DXVA_SliceInfo slice[MAX_SLICES]; |
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const uint8_t *bitstream; |
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unsigned bitstream_size; |
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}; |
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static void fill_picture_parameters(AVCodecContext *avctx, |
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struct dxva_context *ctx, |
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const struct MpegEncContext *s, |
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DXVA_PictureParameters *pp) |
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{ |
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const Picture *current_picture = s->current_picture_ptr; |
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int is_field = s->picture_structure != PICT_FRAME; |
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memset(pp, 0, sizeof(*pp)); |
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pp->wDecodedPictureIndex = ff_dxva2_get_surface_index(ctx, current_picture->f); |
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pp->wDeblockedPictureIndex = 0; |
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if (s->pict_type != AV_PICTURE_TYPE_I) |
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pp->wForwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, s->last_picture.f); |
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else |
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pp->wForwardRefPictureIndex = 0xffff; |
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if (s->pict_type == AV_PICTURE_TYPE_B) |
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pp->wBackwardRefPictureIndex = ff_dxva2_get_surface_index(ctx, s->next_picture.f); |
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else |
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pp->wBackwardRefPictureIndex = 0xffff; |
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pp->wPicWidthInMBminus1 = s->mb_width - 1; |
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pp->wPicHeightInMBminus1 = (s->mb_height >> is_field) - 1; |
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pp->bMacroblockWidthMinus1 = 15; |
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pp->bMacroblockHeightMinus1 = 15; |
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pp->bBlockWidthMinus1 = 7; |
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pp->bBlockHeightMinus1 = 7; |
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pp->bBPPminus1 = 7; |
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pp->bPicStructure = s->picture_structure; |
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pp->bSecondField = is_field && !s->first_field; |
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pp->bPicIntra = s->pict_type == AV_PICTURE_TYPE_I; |
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pp->bPicBackwardPrediction = s->pict_type == AV_PICTURE_TYPE_B; |
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pp->bBidirectionalAveragingMode = 0; |
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pp->bMVprecisionAndChromaRelation= 0; /* FIXME */ |
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pp->bChromaFormat = s->chroma_format; |
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pp->bPicScanFixed = 1; |
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pp->bPicScanMethod = s->alternate_scan ? 1 : 0; |
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pp->bPicReadbackRequests = 0; |
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pp->bRcontrol = 0; |
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pp->bPicSpatialResid8 = 0; |
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pp->bPicOverflowBlocks = 0; |
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pp->bPicExtrapolation = 0; |
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pp->bPicDeblocked = 0; |
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pp->bPicDeblockConfined = 0; |
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pp->bPic4MVallowed = 0; |
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pp->bPicOBMC = 0; |
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pp->bPicBinPB = 0; |
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pp->bMV_RPS = 0; |
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pp->bReservedBits = 0; |
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pp->wBitstreamFcodes = (s->mpeg_f_code[0][0] << 12) | |
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(s->mpeg_f_code[0][1] << 8) | |
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(s->mpeg_f_code[1][0] << 4) | |
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(s->mpeg_f_code[1][1] ); |
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pp->wBitstreamPCEelements = (s->intra_dc_precision << 14) | |
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(s->picture_structure << 12) | |
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(s->top_field_first << 11) | |
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(s->frame_pred_frame_dct << 10) | |
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(s->concealment_motion_vectors << 9) | |
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(s->q_scale_type << 8) | |
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(s->intra_vlc_format << 7) | |
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(s->alternate_scan << 6) | |
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(s->repeat_first_field << 5) | |
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(s->chroma_420_type << 4) | |
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(s->progressive_frame << 3); |
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pp->bBitstreamConcealmentNeed = 0; |
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pp->bBitstreamConcealmentMethod = 0; |
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} |
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static void fill_quantization_matrices(AVCodecContext *avctx, |
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struct dxva_context *ctx, |
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const struct MpegEncContext *s, |
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DXVA_QmatrixData *qm) |
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{ |
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int i; |
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for (i = 0; i < 4; i++) |
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qm->bNewQmatrix[i] = 1; |
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for (i = 0; i < 64; i++) { |
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int n = s->dsp.idct_permutation[ff_zigzag_direct[i]]; |
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qm->Qmatrix[0][i] = s->intra_matrix[n]; |
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qm->Qmatrix[1][i] = s->inter_matrix[n]; |
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qm->Qmatrix[2][i] = s->chroma_intra_matrix[n]; |
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qm->Qmatrix[3][i] = s->chroma_inter_matrix[n]; |
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} |
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} |
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static void fill_slice(AVCodecContext *avctx, |
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const struct MpegEncContext *s, |
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DXVA_SliceInfo *slice, |
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unsigned position, |
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const uint8_t *buffer, unsigned size) |
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{ |
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int is_field = s->picture_structure != PICT_FRAME; |
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GetBitContext gb; |
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memset(slice, 0, sizeof(*slice)); |
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slice->wHorizontalPosition = s->mb_x; |
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slice->wVerticalPosition = s->mb_y >> is_field; |
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slice->dwSliceBitsInBuffer = 8 * size; |
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slice->dwSliceDataLocation = position; |
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slice->bStartCodeBitOffset = 0; |
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slice->bReservedBits = 0; |
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/* XXX We store the index of the first MB and it will be fixed later */ |
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slice->wNumberMBsInSlice = (s->mb_y >> is_field) * s->mb_width + s->mb_x; |
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slice->wBadSliceChopping = 0; |
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init_get_bits(&gb, &buffer[4], 8 * (size - 4)); |
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slice->wQuantizerScaleCode = get_bits(&gb, 5); |
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skip_1stop_8data_bits(&gb); |
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slice->wMBbitOffset = 4 * 8 + get_bits_count(&gb); |
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} |
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static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx, |
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DXVA2_DecodeBufferDesc *bs, |
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DXVA2_DecodeBufferDesc *sc) |
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{ |
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const struct MpegEncContext *s = avctx->priv_data; |
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struct dxva_context *ctx = avctx->hwaccel_context; |
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struct dxva2_picture_context *ctx_pic = |
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s->current_picture_ptr->hwaccel_picture_private; |
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const int is_field = s->picture_structure != PICT_FRAME; |
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const unsigned mb_count = s->mb_width * (s->mb_height >> is_field); |
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uint8_t *dxva_data, *current, *end; |
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unsigned dxva_size; |
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unsigned i; |
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if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder, |
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DXVA2_BitStreamDateBufferType, |
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(void **)&dxva_data, &dxva_size))) |
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return -1; |
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current = dxva_data; |
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end = dxva_data + dxva_size; |
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for (i = 0; i < ctx_pic->slice_count; i++) { |
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DXVA_SliceInfo *slice = &ctx_pic->slice[i]; |
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unsigned position = slice->dwSliceDataLocation; |
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unsigned size = slice->dwSliceBitsInBuffer / 8; |
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if (size > end - current) { |
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av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream"); |
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break; |
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} |
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slice->dwSliceDataLocation = current - dxva_data; |
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if (i < ctx_pic->slice_count - 1) |
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slice->wNumberMBsInSlice = |
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slice[1].wNumberMBsInSlice - slice[0].wNumberMBsInSlice; |
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else |
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slice->wNumberMBsInSlice = |
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mb_count - slice[0].wNumberMBsInSlice; |
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memcpy(current, &ctx_pic->bitstream[position], size); |
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current += size; |
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} |
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if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder, |
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DXVA2_BitStreamDateBufferType))) |
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return -1; |
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if (i < ctx_pic->slice_count) |
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return -1; |
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memset(bs, 0, sizeof(*bs)); |
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bs->CompressedBufferType = DXVA2_BitStreamDateBufferType; |
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bs->DataSize = current - dxva_data; |
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bs->NumMBsInBuffer = mb_count; |
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return ff_dxva2_commit_buffer(avctx, ctx, sc, |
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DXVA2_SliceControlBufferType, |
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ctx_pic->slice, |
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ctx_pic->slice_count * sizeof(*ctx_pic->slice), |
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mb_count); |
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} |
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static int dxva2_mpeg2_start_frame(AVCodecContext *avctx, |
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av_unused const uint8_t *buffer, |
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av_unused uint32_t size) |
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{ |
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const struct MpegEncContext *s = avctx->priv_data; |
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struct dxva_context *ctx = avctx->hwaccel_context; |
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struct dxva2_picture_context *ctx_pic = |
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s->current_picture_ptr->hwaccel_picture_private; |
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if (!ctx->decoder || !ctx->cfg || ctx->surface_count <= 0) |
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return -1; |
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assert(ctx_pic); |
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fill_picture_parameters(avctx, ctx, s, &ctx_pic->pp); |
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fill_quantization_matrices(avctx, ctx, s, &ctx_pic->qm); |
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ctx_pic->slice_count = 0; |
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ctx_pic->bitstream_size = 0; |
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ctx_pic->bitstream = NULL; |
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return 0; |
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} |
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static int dxva2_mpeg2_decode_slice(AVCodecContext *avctx, |
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const uint8_t *buffer, uint32_t size) |
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{ |
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const struct MpegEncContext *s = avctx->priv_data; |
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struct dxva2_picture_context *ctx_pic = |
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s->current_picture_ptr->hwaccel_picture_private; |
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unsigned position; |
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if (ctx_pic->slice_count >= MAX_SLICES) { |
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avpriv_request_sample(avctx, "%d slices in dxva2", |
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ctx_pic->slice_count); |
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return -1; |
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} |
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if (!ctx_pic->bitstream) |
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ctx_pic->bitstream = buffer; |
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ctx_pic->bitstream_size += size; |
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position = buffer - ctx_pic->bitstream; |
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fill_slice(avctx, s, &ctx_pic->slice[ctx_pic->slice_count++], position, |
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buffer, size); |
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return 0; |
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} |
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static int dxva2_mpeg2_end_frame(AVCodecContext *avctx) |
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{ |
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struct MpegEncContext *s = avctx->priv_data; |
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struct dxva2_picture_context *ctx_pic = |
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s->current_picture_ptr->hwaccel_picture_private; |
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int ret; |
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if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0) |
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return -1; |
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ret = ff_dxva2_common_end_frame(avctx, s->current_picture_ptr->f, |
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&ctx_pic->pp, sizeof(ctx_pic->pp), |
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&ctx_pic->qm, sizeof(ctx_pic->qm), |
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commit_bitstream_and_slice_buffer); |
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if (!ret) |
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ff_mpeg_draw_horiz_band(s, 0, avctx->height); |
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return ret; |
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} |
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AVHWAccel ff_mpeg2_dxva2_hwaccel = { |
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.name = "mpeg2_dxva2", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_MPEG2VIDEO, |
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.pix_fmt = AV_PIX_FMT_DXVA2_VLD, |
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.start_frame = dxva2_mpeg2_start_frame, |
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.decode_slice = dxva2_mpeg2_decode_slice, |
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.end_frame = dxva2_mpeg2_end_frame, |
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.frame_priv_data_size = sizeof(struct dxva2_picture_context), |
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};
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