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f4167842c1
More exactly: Not more than one stream of each type for which a default codec (i.e. AVOutputFormat.(audio|video|subtitle)_codec) is set; for those types for which no such codec is set (or for which no designated default codec in AVOutputFormat exists at all) no streams are permitted. Given that with this flag set the default codecs become more important, they are now set explicitly to AV_CODEC_ID_NONE for "unset"; the earlier code relied on AV_CODEC_ID_NONE being equal to zero, so that default static initialization set it accordingly; but this is not how one is supposed to use an enum. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
131 lines
4.0 KiB
C
131 lines
4.0 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, sum_delta_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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if (ctx->frame_cnt)
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ctx->sum_delta_pts += pkt->pts - ctx->last_pts;
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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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