mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-25 16:52:31 +00:00
137 lines
4.4 KiB
C
137 lines
4.4 KiB
C
/*
|
|
* Copyright (c) 2010 Reimar Döffinger
|
|
*
|
|
* 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 "avformat.h"
|
|
#include "internal.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
|
|
typedef struct IVFEncContext {
|
|
unsigned frame_cnt;
|
|
uint64_t last_pts, sum_delta_pts, last_pkt_duration;
|
|
} IVFEncContext;
|
|
|
|
static int ivf_init(AVFormatContext *s)
|
|
{
|
|
AVCodecParameters *par;
|
|
|
|
if (s->nb_streams != 1) {
|
|
av_log(s, AV_LOG_ERROR, "Format supports only exactly one video stream\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
par = s->streams[0]->codecpar;
|
|
if (par->codec_type != AVMEDIA_TYPE_VIDEO ||
|
|
!(par->codec_id == AV_CODEC_ID_AV1 ||
|
|
par->codec_id == AV_CODEC_ID_VP8 ||
|
|
par->codec_id == AV_CODEC_ID_VP9)) {
|
|
av_log(s, AV_LOG_ERROR, "Currently only VP8, VP9 and AV1 are supported!\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (par->codec_id == AV_CODEC_ID_VP9) {
|
|
int ret = ff_stream_add_bitstream_filter(s->streams[0], "vp9_superframe", NULL);
|
|
if (ret < 0)
|
|
return ret;
|
|
} else if (par->codec_id == AV_CODEC_ID_AV1) {
|
|
int ret = ff_stream_add_bitstream_filter(s->streams[0], "av1_metadata", "td=insert");
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ivf_write_header(AVFormatContext *s)
|
|
{
|
|
AVCodecParameters *par = s->streams[0]->codecpar;
|
|
AVIOContext *pb = s->pb;
|
|
|
|
avio_write(pb, "DKIF", 4);
|
|
avio_wl16(pb, 0); // version
|
|
avio_wl16(pb, 32); // header length
|
|
avio_wl32(pb,
|
|
par->codec_id == AV_CODEC_ID_VP9 ? AV_RL32("VP90") :
|
|
par->codec_id == AV_CODEC_ID_VP8 ? AV_RL32("VP80") : AV_RL32("AV01"));
|
|
avio_wl16(pb, par->width);
|
|
avio_wl16(pb, par->height);
|
|
avio_wl32(pb, s->streams[0]->time_base.den);
|
|
avio_wl32(pb, s->streams[0]->time_base.num);
|
|
avio_wl64(pb, 0xFFFFFFFFFFFFFFFFULL); // length is overwritten at the end of muxing
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
IVFEncContext *ctx = s->priv_data;
|
|
|
|
avio_wl32(pb, pkt->size);
|
|
avio_wl64(pb, pkt->pts);
|
|
avio_write(pb, pkt->data, pkt->size);
|
|
if (ctx->frame_cnt)
|
|
ctx->sum_delta_pts += pkt->pts - ctx->last_pts;
|
|
ctx->last_pkt_duration = pkt->duration;
|
|
ctx->frame_cnt++;
|
|
ctx->last_pts = pkt->pts;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ivf_write_trailer(AVFormatContext *s)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
IVFEncContext *ctx = s->priv_data;
|
|
|
|
if ((pb->seekable & AVIO_SEEKABLE_NORMAL) &&
|
|
(ctx->frame_cnt > 1 || (ctx->frame_cnt == 1 && ctx->last_pkt_duration))) {
|
|
int64_t end = avio_tell(pb);
|
|
|
|
avio_seek(pb, 24, SEEK_SET);
|
|
// overwrite the "length" field (duration)
|
|
avio_wl32(pb, ctx->last_pkt_duration ?
|
|
ctx->sum_delta_pts + ctx->last_pkt_duration :
|
|
ctx->frame_cnt * ctx->sum_delta_pts / (ctx->frame_cnt - 1));
|
|
avio_wl32(pb, 0); // zero out unused bytes
|
|
avio_seek(pb, end, SEEK_SET);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const AVCodecTag codec_ivf_tags[] = {
|
|
{ AV_CODEC_ID_VP8, MKTAG('V', 'P', '8', '0') },
|
|
{ AV_CODEC_ID_VP9, MKTAG('V', 'P', '9', '0') },
|
|
{ AV_CODEC_ID_AV1, MKTAG('A', 'V', '0', '1') },
|
|
{ AV_CODEC_ID_NONE, 0 }
|
|
};
|
|
|
|
AVOutputFormat ff_ivf_muxer = {
|
|
.priv_data_size = sizeof(IVFEncContext),
|
|
.name = "ivf",
|
|
.long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
|
|
.extensions = "ivf",
|
|
.audio_codec = AV_CODEC_ID_NONE,
|
|
.video_codec = AV_CODEC_ID_VP8,
|
|
.init = ivf_init,
|
|
.write_header = ivf_write_header,
|
|
.write_packet = ivf_write_packet,
|
|
.write_trailer = ivf_write_trailer,
|
|
.codec_tag = (const AVCodecTag* const []){ codec_ivf_tags, 0 },
|
|
};
|