153 lines
4.5 KiB
C
153 lines
4.5 KiB
C
/*
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* Intel MediaSDK QSV based H.264 decoder
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*
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* copyright (c) 2013 Luca Barbato
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* copyright (c) 2015 Anton Khirnov
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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
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#include <string.h>
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#include <mfx/mfxvideo.h>
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#include "libavutil/common.h"
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#include "libavutil/fifo.h"
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#include "libavutil/opt.h"
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#include "avcodec.h"
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#include "internal.h"
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#include "qsvdec.h"
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typedef struct QSVH264Context {
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AVClass *class;
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QSVContext qsv;
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// the filter for converting to Annex B
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AVBitStreamFilterContext *bsf;
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} QSVH264Context;
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static av_cold int qsv_decode_close(AVCodecContext *avctx)
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{
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QSVH264Context *s = avctx->priv_data;
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ff_qsv_decode_close(&s->qsv);
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av_bitstream_filter_close(s->bsf);
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return 0;
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}
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static av_cold int qsv_decode_init(AVCodecContext *avctx)
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{
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QSVH264Context *s = avctx->priv_data;
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int ret;
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s->bsf = av_bitstream_filter_init("h264_mp4toannexb");
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if (!s->bsf) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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return 0;
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fail:
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qsv_decode_close(avctx);
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return ret;
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}
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static int qsv_decode_frame(AVCodecContext *avctx, void *data,
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int *got_frame, AVPacket *avpkt)
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{
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QSVH264Context *s = avctx->priv_data;
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AVFrame *frame = data;
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int ret;
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uint8_t *p_filtered = NULL;
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int n_filtered = NULL;
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AVPacket pkt_filtered = { 0 };
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if (avpkt->size) {
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if (avpkt->size > 3 && !avpkt->data[0] &&
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!avpkt->data[1] && !avpkt->data[2] && 1==avpkt->data[3]) {
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/* we already have annex-b prefix */
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return ff_qsv_decode(avctx, &s->qsv, frame, got_frame, avpkt);
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} else {
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/* no annex-b prefix. try to restore: */
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ret = av_bitstream_filter_filter(s->bsf, avctx, NULL,
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&p_filtered, &n_filtered,
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avpkt->data, avpkt->size, 0);
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if (ret>=0) {
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pkt_filtered.pts = avpkt->pts;
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pkt_filtered.data = p_filtered;
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pkt_filtered.size = n_filtered;
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ret = ff_qsv_decode(avctx, &s->qsv, frame, got_frame, &pkt_filtered);
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if (p_filtered != avpkt->data)
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av_free(p_filtered);
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return ret > 0 ? avpkt->size : ret;
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}
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}
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}
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return ff_qsv_decode(avctx, &s->qsv, frame, got_frame, avpkt);
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}
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static void qsv_decode_flush(AVCodecContext *avctx)
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{
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// QSVH264Context *s = avctx->priv_data;
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/* TODO: flush qsv engine if necessary */
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}
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AVHWAccel ff_h264_qsv_hwaccel = {
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.name = "h264_qsv",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_H264,
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.pix_fmt = AV_PIX_FMT_QSV,
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};
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#define OFFSET(x) offsetof(QSVH264Context, x)
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#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
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static const AVOption options[] = {
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{ "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 },
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{ NULL },
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};
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static const AVClass class = {
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.class_name = "h264_qsv",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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AVCodec ff_h264_qsv_decoder = {
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.name = "h264_qsv",
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.long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (Intel Quick Sync Video acceleration)"),
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.priv_data_size = sizeof(QSVH264Context),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_H264,
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.init = qsv_decode_init,
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.decode = qsv_decode_frame,
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.flush = qsv_decode_flush,
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.close = qsv_decode_close,
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.capabilities = CODEC_CAP_DELAY,
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.priv_class = &class,
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};
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