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/*
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* Intel MediaSDK QSV based MPEG - 2 video decoder
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*
* 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 <stdint.h>
# include <string.h>
# include "libavutil/common.h"
# include "libavutil/opt.h"
# include "avcodec.h"
# include "qsvdec.h"
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typedef struct QSVMPEG2Context {
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AVClass * class ;
QSVContext qsv ;
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} QSVMPEG2Context ;
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static av_cold int qsv_decode_close ( AVCodecContext * avctx )
{
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QSVMPEG2Context * s = avctx - > priv_data ;
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ff_qsv_decode_close ( & s - > qsv ) ;
return 0 ;
}
static av_cold int qsv_decode_init ( AVCodecContext * avctx )
{
return 0 ;
}
static int qsv_decode_frame ( AVCodecContext * avctx , void * data ,
int * got_frame , AVPacket * avpkt )
{
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QSVMPEG2Context * s = avctx - > priv_data ;
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AVFrame * frame = data ;
return ff_qsv_decode ( avctx , & s - > qsv , frame , got_frame , avpkt ) ;
}
static void qsv_decode_flush ( AVCodecContext * avctx )
{
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QSVMPEG2Context * s = avctx - > priv_data ;
ff_qsv_decode_reset ( avctx , & s - > qsv ) ;
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}
AVHWAccel ff_mpeg2_qsv_hwaccel = {
. name = " mpeg2_qsv " ,
. type = AVMEDIA_TYPE_VIDEO ,
. id = AV_CODEC_ID_MPEG2VIDEO ,
. pix_fmt = AV_PIX_FMT_QSV ,
} ;
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# define OFFSET(x) offsetof(QSVMPEG2Context, x)
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# define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
static const AVOption options [ ] = {
{ " async_depth " , " Internal parallelization depth, the higher the value the higher the latency. " , OFFSET ( qsv . async_depth ) , AV_OPT_TYPE_INT , { . i64 = ASYNC_DEPTH_DEFAULT } , 0 , INT_MAX , VD } ,
{ NULL } ,
} ;
static const AVClass class = {
. class_name = " mpeg2_qsv " ,
. item_name = av_default_item_name ,
. option = options ,
. version = LIBAVUTIL_VERSION_INT ,
} ;
AVCodec ff_mpeg2_qsv_decoder = {
. name = " mpeg2_qsv " ,
. long_name = NULL_IF_CONFIG_SMALL ( " MPEG-2 video (Intel Quick Sync Video acceleration) " ) ,
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. priv_data_size = sizeof ( QSVMPEG2Context ) ,
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. type = AVMEDIA_TYPE_VIDEO ,
. id = AV_CODEC_ID_MPEG2VIDEO ,
. init = qsv_decode_init ,
. decode = qsv_decode_frame ,
. flush = qsv_decode_flush ,
. close = qsv_decode_close ,
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. capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1 ,
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. priv_class = & class ,
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. pix_fmts = ( const enum AVPixelFormat [ ] ) { AV_PIX_FMT_NV12 ,
AV_PIX_FMT_QSV ,
AV_PIX_FMT_NONE } ,
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} ;