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https://git.ffmpeg.org/ffmpeg.git
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d4a91e6534
Certain hardware decoding APIs are not guaranteed to be thread-safe, so having the user access decoded hardware surfaces while the decoder is running in another thread can cause failures (this is mainly known to happen with DXVA2). For such hwaccels, only allow the decoding thread to run while the user is inside a lavc decode call (avcodec_send_packet/receive_frame).
124 lines
4.5 KiB
C
124 lines
4.5 KiB
C
/*
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* MPEG-4 Part 2 / H.263 decode acceleration through VDPAU
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*
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* Copyright (c) 2008 NVIDIA
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* Copyright (c) 2013 Rémi Denis-Courmont
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <vdpau/vdpau.h>
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#include "avcodec.h"
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#include "hwaccel.h"
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#include "mpeg4video.h"
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#include "vdpau.h"
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#include "vdpau_internal.h"
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static int vdpau_mpeg4_start_frame(AVCodecContext *avctx,
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const uint8_t *buffer, uint32_t size)
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{
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Mpeg4DecContext *ctx = avctx->priv_data;
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MpegEncContext * const s = &ctx->m;
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Picture *pic = s->current_picture_ptr;
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struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
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VdpPictureInfoMPEG4Part2 *info = &pic_ctx->info.mpeg4;
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VdpVideoSurface ref;
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int i;
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/* fill VdpPictureInfoMPEG4Part2 struct */
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info->forward_reference = VDP_INVALID_HANDLE;
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info->backward_reference = VDP_INVALID_HANDLE;
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info->vop_coding_type = 0;
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switch (s->pict_type) {
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case AV_PICTURE_TYPE_B:
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ref = ff_vdpau_get_surface_id(s->next_picture.f);
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assert(ref != VDP_INVALID_HANDLE);
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info->backward_reference = ref;
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info->vop_coding_type = 2;
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/* fall-through */
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case AV_PICTURE_TYPE_P:
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ref = ff_vdpau_get_surface_id(s->last_picture.f);
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assert(ref != VDP_INVALID_HANDLE);
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info->forward_reference = ref;
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}
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info->trd[0] = s->pp_time;
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info->trb[0] = s->pb_time;
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info->trd[1] = s->pp_field_time >> 1;
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info->trb[1] = s->pb_field_time >> 1;
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info->vop_time_increment_resolution = s->avctx->framerate.num;
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info->vop_fcode_forward = s->f_code;
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info->vop_fcode_backward = s->b_code;
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info->resync_marker_disable = !ctx->resync_marker;
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info->interlaced = !s->progressive_sequence;
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info->quant_type = s->mpeg_quant;
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info->quarter_sample = s->quarter_sample;
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info->short_video_header = avctx->codec->id == AV_CODEC_ID_H263;
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info->rounding_control = s->no_rounding;
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info->alternate_vertical_scan_flag = s->alternate_scan;
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info->top_field_first = s->top_field_first;
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for (i = 0; i < 64; ++i) {
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info->intra_quantizer_matrix[i] = s->intra_matrix[i];
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info->non_intra_quantizer_matrix[i] = s->inter_matrix[i];
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}
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ff_vdpau_common_start_frame(pic_ctx, buffer, size);
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return ff_vdpau_add_buffer(pic_ctx, buffer, size);
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}
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static int vdpau_mpeg4_decode_slice(av_unused 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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return 0;
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}
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static int vdpau_mpeg4_init(AVCodecContext *avctx)
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{
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VdpDecoderProfile profile;
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switch (avctx->profile) {
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case FF_PROFILE_MPEG4_SIMPLE:
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profile = VDP_DECODER_PROFILE_MPEG4_PART2_SP;
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break;
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case FF_PROFILE_MPEG4_ADVANCED_SIMPLE:
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profile = VDP_DECODER_PROFILE_MPEG4_PART2_ASP;
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break;
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default:
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return AVERROR(ENOTSUP);
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}
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return ff_vdpau_common_init(avctx, profile, avctx->level);
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}
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AVHWAccel ff_mpeg4_vdpau_hwaccel = {
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.name = "mpeg4_vdpau",
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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_VDPAU,
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.start_frame = vdpau_mpeg4_start_frame,
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.end_frame = ff_vdpau_mpeg_end_frame,
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.decode_slice = vdpau_mpeg4_decode_slice,
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.frame_priv_data_size = sizeof(struct vdpau_picture_context),
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.init = vdpau_mpeg4_init,
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.uninit = ff_vdpau_common_uninit,
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.priv_data_size = sizeof(VDPAUContext),
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.caps_internal = HWACCEL_CAP_ASYNC_SAFE,
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};
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