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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; |
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if (s->nb_streams != 1) { |
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av_log(s, AV_LOG_ERROR, "Format supports only exactly one video stream\n"); |
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return AVERROR(EINVAL); |
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} |
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par = s->streams[0]->codecpar; |
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if (par->codec_type != AVMEDIA_TYPE_VIDEO || |
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!(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); |
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avio_wl16(pb, 32); |
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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); |
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avio_wl32(pb, 0); |
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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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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.codec_tag = (const AVCodecTag* const []){ codec_ivf_tags, 0 }, |
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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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