128 lines
4.7 KiB
C
Executable File
128 lines
4.7 KiB
C
Executable File
/*
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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 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 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 "hwconfig.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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// As any ASP decoder must be able to decode SP, this
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// should be a safe fallback if profile is unknown/unspecified.
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case FF_PROFILE_UNKNOWN:
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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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const 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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.frame_params = ff_vdpau_common_frame_params,
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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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