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/*
* Intel MediaSDK QSV based H.264 decoder
*
* copyright (c) 2013 Luca Barbato
* copyright (c) 2015 Anton Khirnov
*
* 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 <mfx/mfxvideo.h>
#include "libavutil/common.h"
#include "libavutil/fifo.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "internal.h"
#include "qsvdec.h"
typedef struct QSVH264Context {
AVClass *class;
QSVContext qsv;
// the filter for converting to Annex B
AVBitStreamFilterContext *bsf;
} QSVH264Context;
static av_cold int qsv_decode_close(AVCodecContext *avctx)
{
QSVH264Context *s = avctx->priv_data;
ff_qsv_decode_close(&s->qsv);
av_bitstream_filter_close(s->bsf);
return 0;
}
static av_cold int qsv_decode_init(AVCodecContext *avctx)
{
QSVH264Context *s = avctx->priv_data;
int ret;
s->bsf = av_bitstream_filter_init("h264_mp4toannexb");
if (!s->bsf) {
ret = AVERROR(ENOMEM);
goto fail;
}
return 0;
fail:
qsv_decode_close(avctx);
return ret;
}
static int qsv_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
QSVH264Context *s = avctx->priv_data;
AVFrame *frame = data;
int ret;
uint8_t *p_filtered = NULL;
int n_filtered = NULL;
AVPacket pkt_filtered = { 0 };
if (avpkt->size) {
if (avpkt->size > 3 && !avpkt->data[0] &&
!avpkt->data[1] && !avpkt->data[2] && 1==avpkt->data[3]) {
/* we already have annex-b prefix */
return ff_qsv_decode(avctx, &s->qsv, frame, got_frame, avpkt);
} else {
/* no annex-b prefix. try to restore: */
ret = av_bitstream_filter_filter(s->bsf, avctx, NULL,
&p_filtered, &n_filtered,
avpkt->data, avpkt->size, 0);
if (ret>=0) {
pkt_filtered.pts = avpkt->pts;
pkt_filtered.data = p_filtered;
pkt_filtered.size = n_filtered;
ret = ff_qsv_decode(avctx, &s->qsv, frame, got_frame, &pkt_filtered);
if (p_filtered != avpkt->data)
av_free(p_filtered);
return ret > 0 ? avpkt->size : ret;
}
}
}
return ff_qsv_decode(avctx, &s->qsv, frame, got_frame, avpkt);
}
static void qsv_decode_flush(AVCodecContext *avctx)
{
// QSVH264Context *s = avctx->priv_data;
/* TODO: flush qsv engine if necessary */
}
AVHWAccel ff_h264_qsv_hwaccel = {
.name = "h264_qsv",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.pix_fmt = AV_PIX_FMT_QSV,
};
#define OFFSET(x) offsetof(QSVH264Context, x)
#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 = "h264_qsv",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVCodec ff_h264_qsv_decoder = {
.name = "h264_qsv",
.long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (Intel Quick Sync Video acceleration)"),
.priv_data_size = sizeof(QSVH264Context),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.init = qsv_decode_init,
.decode = qsv_decode_frame,
.flush = qsv_decode_flush,
.close = qsv_decode_close,
.capabilities = CODEC_CAP_DELAY,
.priv_class = &class,
};
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