mirror of
https://github.com/librempeg/librempeg
synced 2024-11-22 09:02:20 +00:00
129 lines
3.9 KiB
C
129 lines
3.9 KiB
C
/*
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* Copyright (c) 2010 Reimar Döffinger
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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 "avformat.h"
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#include "internal.h"
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#include "mux.h"
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#include "libavutil/intreadwrite.h"
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typedef struct IVFEncContext {
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unsigned frame_cnt;
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uint64_t last_pts, last_pkt_duration;
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} IVFEncContext;
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static int ivf_init(AVFormatContext *s)
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{
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AVCodecParameters *par = s->streams[0]->codecpar;
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if (!(par->codec_id == AV_CODEC_ID_AV1 ||
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par->codec_id == AV_CODEC_ID_VP8 ||
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par->codec_id == AV_CODEC_ID_VP9)) {
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av_log(s, AV_LOG_ERROR, "Currently only VP8, VP9 and AV1 are supported!\n");
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return AVERROR(EINVAL);
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}
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if (par->codec_id == AV_CODEC_ID_VP9) {
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int ret = ff_stream_add_bitstream_filter(s->streams[0], "vp9_superframe", NULL);
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if (ret < 0)
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return ret;
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} else if (par->codec_id == AV_CODEC_ID_AV1) {
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int ret = ff_stream_add_bitstream_filter(s->streams[0], "av1_metadata", "td=insert");
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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static int ivf_write_header(AVFormatContext *s)
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{
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AVCodecParameters *par = s->streams[0]->codecpar;
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AVIOContext *pb = s->pb;
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avio_write(pb, "DKIF", 4);
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avio_wl16(pb, 0); // version
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avio_wl16(pb, 32); // header length
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avio_wl32(pb,
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par->codec_id == AV_CODEC_ID_VP9 ? AV_RL32("VP90") :
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par->codec_id == AV_CODEC_ID_VP8 ? AV_RL32("VP80") : AV_RL32("AV01"));
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avio_wl16(pb, par->width);
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avio_wl16(pb, par->height);
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avio_wl32(pb, s->streams[0]->time_base.den);
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avio_wl32(pb, s->streams[0]->time_base.num);
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avio_wl32(pb, 0xFFFFFFFF); // "number of frames" is overwritten at the end of muxing
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avio_wl32(pb, 0); // unused
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return 0;
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}
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static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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AVIOContext *pb = s->pb;
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IVFEncContext *ctx = s->priv_data;
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avio_wl32(pb, pkt->size);
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avio_wl64(pb, pkt->pts);
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avio_write(pb, pkt->data, pkt->size);
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ctx->last_pkt_duration = pkt->duration;
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ctx->frame_cnt++;
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ctx->last_pts = pkt->pts;
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return 0;
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}
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static int ivf_write_trailer(AVFormatContext *s)
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{
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AVIOContext *pb = s->pb;
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IVFEncContext *ctx = s->priv_data;
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// overwrite the "number of frames"
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if ((pb->seekable & AVIO_SEEKABLE_NORMAL)) {
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int64_t end = avio_tell(pb);
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avio_seek(pb, 24, SEEK_SET);
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avio_wl32(pb, ctx->frame_cnt);
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avio_seek(pb, end, SEEK_SET);
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}
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return 0;
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}
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static const AVCodecTag codec_ivf_tags[] = {
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{ AV_CODEC_ID_VP8, MKTAG('V', 'P', '8', '0') },
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{ AV_CODEC_ID_VP9, MKTAG('V', 'P', '9', '0') },
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{ AV_CODEC_ID_AV1, MKTAG('A', 'V', '0', '1') },
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{ AV_CODEC_ID_NONE, 0 }
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};
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const FFOutputFormat ff_ivf_muxer = {
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.p.name = "ivf",
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.p.long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
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.p.extensions = "ivf",
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.p.audio_codec = AV_CODEC_ID_NONE,
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.p.video_codec = AV_CODEC_ID_VP8,
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.p.subtitle_codec = AV_CODEC_ID_NONE,
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.p.codec_tag = (const AVCodecTag* const []){ codec_ivf_tags, 0 },
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.flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH,
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.priv_data_size = sizeof(IVFEncContext),
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.init = ivf_init,
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.write_header = ivf_write_header,
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.write_packet = ivf_write_packet,
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.write_trailer = ivf_write_trailer,
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};
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