aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* MPEG-4 Part 2 / H.263 decode acceleration through VDPAU
*
* Copyright (c) 2008 NVIDIA
* Copyright (c) 2013 Rémi Denis-Courmont
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <vdpau/vdpau.h>
#include "avcodec.h"
#include "hwaccel.h"
#include "mpeg4video.h"
#include "vdpau.h"
#include "vdpau_internal.h"
static int vdpau_mpeg4_start_frame(AVCodecContext *avctx,
const uint8_t *buffer, uint32_t size)
{
Mpeg4DecContext *ctx = avctx->priv_data;
MpegEncContext * const s = &ctx->m;
Picture *pic = s->current_picture_ptr;
struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
VdpPictureInfoMPEG4Part2 *info = &pic_ctx->info.mpeg4;
VdpVideoSurface ref;
int i;
/* fill VdpPictureInfoMPEG4Part2 struct */
info->forward_reference = VDP_INVALID_HANDLE;
info->backward_reference = VDP_INVALID_HANDLE;
info->vop_coding_type = 0;
switch (s->pict_type) {
case AV_PICTURE_TYPE_B:
ref = ff_vdpau_get_surface_id(s->next_picture.f);
assert(ref != VDP_INVALID_HANDLE);
info->backward_reference = ref;
info->vop_coding_type = 2;
/* fall-through */
case AV_PICTURE_TYPE_P:
ref = ff_vdpau_get_surface_id(s->last_picture.f);
assert(ref != VDP_INVALID_HANDLE);
info->forward_reference = ref;
}
info->trd[0] = s->pp_time;
info->trb[0] = s->pb_time;
info->trd[1] = s->pp_field_time >> 1;
info->trb[1] = s->pb_field_time >> 1;
info->vop_time_increment_resolution = s->avctx->framerate.num;
info->vop_fcode_forward = s->f_code;
info->vop_fcode_backward = s->b_code;
info->resync_marker_disable = !ctx->resync_marker;
info->interlaced = !s->progressive_sequence;
info->quant_type = s->mpeg_quant;
info->quarter_sample = s->quarter_sample;
info->short_video_header = avctx->codec->id == AV_CODEC_ID_H263;
info->rounding_control = s->no_rounding;
info->alternate_vertical_scan_flag = s->alternate_scan;
info->top_field_first = s->top_field_first;
for (i = 0; i < 64; ++i) {
info->intra_quantizer_matrix[i] = s->intra_matrix[i];
info->non_intra_quantizer_matrix[i] = s->inter_matrix[i];
}
ff_vdpau_common_start_frame(pic_ctx, buffer, size);
return ff_vdpau_add_buffer(pic_ctx, buffer, size);
}
static int vdpau_mpeg4_decode_slice(av_unused AVCodecContext *avctx,
av_unused const uint8_t *buffer,
av_unused uint32_t size)
{
return 0;
}
static int vdpau_mpeg4_init(AVCodecContext *avctx)
{
VdpDecoderProfile profile;
switch (avctx->profile) {
case FF_PROFILE_MPEG4_SIMPLE:
profile = VDP_DECODER_PROFILE_MPEG4_PART2_SP;
break;
// As any ASP decoder must be able to decode SP, this
// should be a safe fallback if profile is unknown/unspecified.
case FF_PROFILE_UNKNOWN:
case FF_PROFILE_MPEG4_ADVANCED_SIMPLE:
profile = VDP_DECODER_PROFILE_MPEG4_PART2_ASP;
break;
default:
return AVERROR(ENOTSUP);
}
return ff_vdpau_common_init(avctx, profile, avctx->level);
}
const AVHWAccel ff_mpeg4_vdpau_hwaccel = {
.name = "mpeg4_vdpau",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_MPEG4,
.pix_fmt = AV_PIX_FMT_VDPAU,
.start_frame = vdpau_mpeg4_start_frame,
.end_frame = ff_vdpau_mpeg_end_frame,
.decode_slice = vdpau_mpeg4_decode_slice,
.frame_priv_data_size = sizeof(struct vdpau_picture_context),
.init = vdpau_mpeg4_init,
.uninit = ff_vdpau_common_uninit,
.frame_params = ff_vdpau_common_frame_params,
.priv_data_size = sizeof(VDPAUContext),
.caps_internal = HWACCEL_CAP_ASYNC_SAFE,
};
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