forked from KolibriOS/kolibrios
277 lines
11 KiB
C
277 lines
11 KiB
C
/*
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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 "dxva2_internal.h"
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#define MAX_SLICES (SLICE_MAX_START_CODE - SLICE_MIN_START_CODE + 1)
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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);
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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);
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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);
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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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while (get_bits1(&gb))
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skip_bits(&gb, 8);
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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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return -1;
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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,
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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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.priv_data_size = sizeof(struct dxva2_picture_context),
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};
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