mirror of
https://github.com/FFmpeg/FFmpeg.git
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2aa8e33d7d
Issues with the code: 1) The skip_bits_long breaks packed B-frames since we skip of the packed frame, even for VDPAU. 2) Calling ff_h263_find_resync_marker_reverse is nonsense for MPEG-4, and for H.263 the only code using this (vaapi_mpeg4) explicitly reverts this change! 3) mb_x/mb_y are always 0 when vaapi_mpeg4_decode_slice, so doing computations with them is just obfuscation 4) due to not updating mb_y the code would always go into the error resilience case, causing nonsense error messages and maybe further issues. While tested to fix the data provided to the decoder in case of VDPAU so it is the same as for the non-hwaccel code, the VA-API code was not tested to still work, and adding regression testing even as a quick hack is much more complicated for it. Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
159 lines
7.0 KiB
C
159 lines
7.0 KiB
C
/*
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* MPEG-4 / H.263 HW decode acceleration through VA API
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*
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* Copyright (C) 2008-2009 Splitted-Desktop Systems
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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 "vaapi_internal.h"
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#include "h263.h"
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/** Reconstruct bitstream intra_dc_vlc_thr */
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static int mpeg4_get_intra_dc_vlc_thr(MpegEncContext *s)
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{
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switch (s->intra_dc_threshold) {
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case 99: return 0;
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case 13: return 1;
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case 15: return 2;
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case 17: return 3;
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case 19: return 4;
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case 21: return 5;
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case 23: return 6;
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case 0: return 7;
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}
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return 0;
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}
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static int vaapi_mpeg4_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
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{
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MpegEncContext * const s = avctx->priv_data;
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struct vaapi_context * const vactx = avctx->hwaccel_context;
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VAPictureParameterBufferMPEG4 *pic_param;
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VAIQMatrixBufferMPEG4 *iq_matrix;
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int i;
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av_dlog(avctx, "vaapi_mpeg4_start_frame()\n");
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vactx->slice_param_size = sizeof(VASliceParameterBufferMPEG4);
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/* Fill in VAPictureParameterBufferMPEG4 */
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pic_param = ff_vaapi_alloc_pic_param(vactx, sizeof(VAPictureParameterBufferMPEG4));
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if (!pic_param)
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return -1;
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pic_param->vop_width = s->width;
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pic_param->vop_height = s->height;
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pic_param->forward_reference_picture = VA_INVALID_ID;
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pic_param->backward_reference_picture = VA_INVALID_ID;
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pic_param->vol_fields.value = 0; /* reset all bits */
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pic_param->vol_fields.bits.short_video_header = avctx->codec->id == AV_CODEC_ID_H263;
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pic_param->vol_fields.bits.chroma_format = CHROMA_420;
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pic_param->vol_fields.bits.interlaced = !s->progressive_sequence;
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pic_param->vol_fields.bits.obmc_disable = 1;
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pic_param->vol_fields.bits.sprite_enable = s->vol_sprite_usage;
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pic_param->vol_fields.bits.sprite_warping_accuracy = s->sprite_warping_accuracy;
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pic_param->vol_fields.bits.quant_type = s->mpeg_quant;
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pic_param->vol_fields.bits.quarter_sample = s->quarter_sample;
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pic_param->vol_fields.bits.data_partitioned = s->data_partitioning;
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pic_param->vol_fields.bits.reversible_vlc = s->rvlc;
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pic_param->vol_fields.bits.resync_marker_disable = !s->resync_marker;
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pic_param->no_of_sprite_warping_points = s->num_sprite_warping_points;
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for (i = 0; i < s->num_sprite_warping_points && i < 3; i++) {
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pic_param->sprite_trajectory_du[i] = s->sprite_traj[i][0];
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pic_param->sprite_trajectory_dv[i] = s->sprite_traj[i][1];
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}
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pic_param->quant_precision = s->quant_precision;
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pic_param->vop_fields.value = 0; /* reset all bits */
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pic_param->vop_fields.bits.vop_coding_type = s->pict_type - AV_PICTURE_TYPE_I;
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pic_param->vop_fields.bits.backward_reference_vop_coding_type = s->pict_type == AV_PICTURE_TYPE_B ? s->next_picture.f.pict_type - AV_PICTURE_TYPE_I : 0;
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pic_param->vop_fields.bits.vop_rounding_type = s->no_rounding;
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pic_param->vop_fields.bits.intra_dc_vlc_thr = mpeg4_get_intra_dc_vlc_thr(s);
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pic_param->vop_fields.bits.top_field_first = s->top_field_first;
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pic_param->vop_fields.bits.alternate_vertical_scan_flag = s->alternate_scan;
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pic_param->vop_fcode_forward = s->f_code;
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pic_param->vop_fcode_backward = s->b_code;
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pic_param->vop_time_increment_resolution = avctx->time_base.den;
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pic_param->num_macroblocks_in_gob = s->mb_width * ff_h263_get_gob_height(s);
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pic_param->num_gobs_in_vop = (s->mb_width * s->mb_height) / pic_param->num_macroblocks_in_gob;
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pic_param->TRB = s->pb_time;
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pic_param->TRD = s->pp_time;
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if (s->pict_type == AV_PICTURE_TYPE_B)
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pic_param->backward_reference_picture = ff_vaapi_get_surface_id(&s->next_picture);
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if (s->pict_type != AV_PICTURE_TYPE_I)
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pic_param->forward_reference_picture = ff_vaapi_get_surface_id(&s->last_picture);
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/* Fill in VAIQMatrixBufferMPEG4 */
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/* Only the first inverse quantisation method uses the weighting matrices */
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if (pic_param->vol_fields.bits.quant_type) {
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iq_matrix = ff_vaapi_alloc_iq_matrix(vactx, sizeof(VAIQMatrixBufferMPEG4));
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if (!iq_matrix)
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return -1;
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iq_matrix->load_intra_quant_mat = 1;
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iq_matrix->load_non_intra_quant_mat = 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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iq_matrix->intra_quant_mat[i] = s->intra_matrix[n];
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iq_matrix->non_intra_quant_mat[i] = s->inter_matrix[n];
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}
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}
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return 0;
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}
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static int vaapi_mpeg4_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
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{
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MpegEncContext * const s = avctx->priv_data;
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VASliceParameterBufferMPEG4 *slice_param;
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av_dlog(avctx, "vaapi_mpeg4_decode_slice(): buffer %p, size %d\n", buffer, size);
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/* Fill in VASliceParameterBufferMPEG4 */
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slice_param = (VASliceParameterBufferMPEG4 *)ff_vaapi_alloc_slice(avctx->hwaccel_context, buffer, size);
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if (!slice_param)
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return -1;
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slice_param->macroblock_offset = get_bits_count(&s->gb) % 8;
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slice_param->macroblock_number = 0;
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slice_param->quant_scale = s->qscale;
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return 0;
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}
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#if CONFIG_MPEG4_VAAPI_HWACCEL
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AVHWAccel ff_mpeg4_vaapi_hwaccel = {
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.name = "mpeg4_vaapi",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_MPEG4,
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.pix_fmt = AV_PIX_FMT_VAAPI_VLD,
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.start_frame = vaapi_mpeg4_start_frame,
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.end_frame = ff_vaapi_mpeg_end_frame,
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.decode_slice = vaapi_mpeg4_decode_slice,
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};
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#endif
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#if CONFIG_H263_VAAPI_HWACCEL
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AVHWAccel ff_h263_vaapi_hwaccel = {
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.name = "h263_vaapi",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_H263,
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.pix_fmt = AV_PIX_FMT_VAAPI_VLD,
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.start_frame = vaapi_mpeg4_start_frame,
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.end_frame = ff_vaapi_mpeg_end_frame,
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.decode_slice = vaapi_mpeg4_decode_slice,
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};
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#endif
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