FFmpeg/libavcodec/vdpau_vc1.c
Anton Khirnov d4a91e6534 pthread_frame: do not run hwaccel decoding asynchronously unless it's safe
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).
2016-12-19 08:10:22 +01:00

165 lines
5.6 KiB
C

/*
* VC-1 decode acceleration through VDPAU
*
* Copyright (c) 2008 NVIDIA
* Copyright (c) 2013 Rémi Denis-Courmont
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; 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 "vc1.h"
#include "vdpau.h"
#include "vdpau_internal.h"
static int vdpau_vc1_start_frame(AVCodecContext *avctx,
const uint8_t *buffer, uint32_t size)
{
VC1Context * const v = avctx->priv_data;
MpegEncContext * const s = &v->s;
Picture *pic = s->current_picture_ptr;
struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
VdpPictureInfoVC1 *info = &pic_ctx->info.vc1;
VdpVideoSurface ref;
/* fill LvPictureInfoVC1 struct */
info->forward_reference = VDP_INVALID_HANDLE;
info->backward_reference = VDP_INVALID_HANDLE;
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;
/* 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->slice_count = 0;
if (v->bi_type)
info->picture_type = 4;
else
info->picture_type = s->pict_type - 1 + s->pict_type / 3;
info->frame_coding_mode = v->fcm ? (v->fcm + 1) : 0;
info->postprocflag = v->postprocflag;
info->pulldown = v->broadcast;
info->interlace = v->interlace;
info->tfcntrflag = v->tfcntrflag;
info->finterpflag = v->finterpflag;
info->psf = v->psf;
info->dquant = v->dquant;
info->panscan_flag = v->panscanflag;
info->refdist_flag = v->refdist_flag;
info->quantizer = v->quantizer_mode;
info->extended_mv = v->extended_mv;
info->extended_dmv = v->extended_dmv;
info->overlap = v->overlap;
info->vstransform = v->vstransform;
info->loopfilter = v->s.loop_filter;
info->fastuvmc = v->fastuvmc;
info->range_mapy_flag = v->range_mapy_flag;
info->range_mapy = v->range_mapy;
info->range_mapuv_flag = v->range_mapuv_flag;
info->range_mapuv = v->range_mapuv;
/* Specific to simple/main profile only */
info->multires = v->multires;
info->syncmarker = v->resync_marker;
info->rangered = v->rangered | (v->rangeredfrm << 1);
info->maxbframes = v->s.max_b_frames;
info->deblockEnable = v->postprocflag & 1;
info->pquant = v->pq;
return ff_vdpau_common_start_frame(pic_ctx, buffer, size);
}
static int vdpau_vc1_decode_slice(AVCodecContext *avctx,
const uint8_t *buffer, uint32_t size)
{
VC1Context * const v = avctx->priv_data;
MpegEncContext * const s = &v->s;
Picture *pic = s->current_picture_ptr;
struct vdpau_picture_context *pic_ctx = pic->hwaccel_picture_private;
int val;
val = ff_vdpau_add_buffer(pic_ctx, buffer, size);
if (val < 0)
return val;
pic_ctx->info.vc1.slice_count++;
return 0;
}
static int vdpau_vc1_init(AVCodecContext *avctx)
{
VdpDecoderProfile profile;
switch (avctx->profile) {
case FF_PROFILE_VC1_SIMPLE:
profile = VDP_DECODER_PROFILE_VC1_SIMPLE;
break;
case FF_PROFILE_VC1_MAIN:
profile = VDP_DECODER_PROFILE_VC1_MAIN;
break;
case FF_PROFILE_VC1_ADVANCED:
profile = VDP_DECODER_PROFILE_VC1_ADVANCED;
break;
default:
return AVERROR(ENOTSUP);
}
return ff_vdpau_common_init(avctx, profile, avctx->level);
}
#if CONFIG_WMV3_VDPAU_HWACCEL
AVHWAccel ff_wmv3_vdpau_hwaccel = {
.name = "wm3_vdpau",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_WMV3,
.pix_fmt = AV_PIX_FMT_VDPAU,
.start_frame = vdpau_vc1_start_frame,
.end_frame = ff_vdpau_mpeg_end_frame,
.decode_slice = vdpau_vc1_decode_slice,
.frame_priv_data_size = sizeof(struct vdpau_picture_context),
.init = vdpau_vc1_init,
.uninit = ff_vdpau_common_uninit,
.priv_data_size = sizeof(VDPAUContext),
.caps_internal = HWACCEL_CAP_ASYNC_SAFE,
};
#endif
AVHWAccel ff_vc1_vdpau_hwaccel = {
.name = "vc1_vdpau",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_VC1,
.pix_fmt = AV_PIX_FMT_VDPAU,
.start_frame = vdpau_vc1_start_frame,
.end_frame = ff_vdpau_mpeg_end_frame,
.decode_slice = vdpau_vc1_decode_slice,
.frame_priv_data_size = sizeof(struct vdpau_picture_context),
.init = vdpau_vc1_init,
.uninit = ff_vdpau_common_uninit,
.priv_data_size = sizeof(VDPAUContext),
.caps_internal = HWACCEL_CAP_ASYNC_SAFE,
};