LCOV - code coverage report
Current view: top level - libavformat - ivfenc.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 44 50 88.0 %
Date: 2018-05-20 11:54:08 Functions: 4 4 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2010 Reimar Döffinger
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : #include "avformat.h"
      21             : #include "internal.h"
      22             : #include "libavutil/intreadwrite.h"
      23             : 
      24             : typedef struct IVFEncContext {
      25             :     unsigned frame_cnt;
      26             :     uint64_t last_pts, sum_delta_pts;
      27             : } IVFEncContext;
      28             : 
      29          14 : static int ivf_write_header(AVFormatContext *s)
      30             : {
      31             :     AVCodecParameters *par;
      32          14 :     AVIOContext *pb = s->pb;
      33             : 
      34          14 :     if (s->nb_streams != 1) {
      35           0 :         av_log(s, AV_LOG_ERROR, "Format supports only exactly one video stream\n");
      36           0 :         return AVERROR(EINVAL);
      37             :     }
      38          14 :     par = s->streams[0]->codecpar;
      39          28 :     if (par->codec_type != AVMEDIA_TYPE_VIDEO ||
      40          42 :         !(par->codec_id == AV_CODEC_ID_AV1 ||
      41          14 :           par->codec_id == AV_CODEC_ID_VP8 ||
      42          14 :           par->codec_id == AV_CODEC_ID_VP9)) {
      43           0 :         av_log(s, AV_LOG_ERROR, "Currently only VP8, VP9 and AV1 are supported!\n");
      44           0 :         return AVERROR(EINVAL);
      45             :     }
      46          14 :     avio_write(pb, "DKIF", 4);
      47          14 :     avio_wl16(pb, 0); // version
      48          14 :     avio_wl16(pb, 32); // header length
      49          14 :     avio_wl32(pb, par->codec_tag ? par->codec_tag :
      50           0 :               par->codec_id == AV_CODEC_ID_VP9 ? AV_RL32("VP90") :
      51           0 :               par->codec_id == AV_CODEC_ID_VP8 ? AV_RL32("VP80") : AV_RL32("AV01"));
      52          14 :     avio_wl16(pb, par->width);
      53          14 :     avio_wl16(pb, par->height);
      54          14 :     avio_wl32(pb, s->streams[0]->time_base.den);
      55          14 :     avio_wl32(pb, s->streams[0]->time_base.num);
      56          14 :     avio_wl64(pb, 0xFFFFFFFFFFFFFFFFULL);
      57             : 
      58          14 :     return 0;
      59             : }
      60             : 
      61         183 : static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
      62             : {
      63         183 :     AVIOContext *pb = s->pb;
      64         183 :     IVFEncContext *ctx = s->priv_data;
      65             : 
      66         183 :     avio_wl32(pb, pkt->size);
      67         183 :     avio_wl64(pb, pkt->pts);
      68         183 :     avio_write(pb, pkt->data, pkt->size);
      69         183 :     if (ctx->frame_cnt)
      70         169 :         ctx->sum_delta_pts += pkt->pts - ctx->last_pts;
      71         183 :     ctx->frame_cnt++;
      72         183 :     ctx->last_pts = pkt->pts;
      73             : 
      74         183 :     return 0;
      75             : }
      76             : 
      77          14 : static int ivf_write_trailer(AVFormatContext *s)
      78             : {
      79          14 :     AVIOContext *pb = s->pb;
      80          14 :     IVFEncContext *ctx = s->priv_data;
      81             : 
      82          14 :     if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && ctx->frame_cnt > 1) {
      83          14 :         size_t end = avio_tell(pb);
      84             : 
      85          14 :         avio_seek(pb, 24, SEEK_SET);
      86          14 :         avio_wl64(pb, ctx->frame_cnt * ctx->sum_delta_pts / (ctx->frame_cnt - 1));
      87          14 :         avio_seek(pb, end, SEEK_SET);
      88             :     }
      89             : 
      90          14 :     return 0;
      91             : }
      92             : 
      93          14 : static int ivf_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt)
      94             : {
      95          14 :     int ret = 1;
      96          14 :     AVStream *st = s->streams[pkt->stream_index];
      97             : 
      98          14 :     if (st->codecpar->codec_id == AV_CODEC_ID_VP9)
      99          14 :         ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL);
     100             : 
     101          14 :     return ret;
     102             : }
     103             : 
     104             : static const AVCodecTag codec_ivf_tags[] = {
     105             :     { AV_CODEC_ID_VP8,  MKTAG('V', 'P', '8', '0') },
     106             :     { AV_CODEC_ID_VP9,  MKTAG('V', 'P', '9', '0') },
     107             :     { AV_CODEC_ID_AV1,  MKTAG('A', 'V', '0', '1') },
     108             :     { AV_CODEC_ID_NONE, 0 }
     109             : };
     110             : 
     111             : AVOutputFormat ff_ivf_muxer = {
     112             :     .priv_data_size = sizeof(IVFEncContext),
     113             :     .name         = "ivf",
     114             :     .long_name    = NULL_IF_CONFIG_SMALL("On2 IVF"),
     115             :     .extensions   = "ivf",
     116             :     .audio_codec  = AV_CODEC_ID_NONE,
     117             :     .video_codec  = AV_CODEC_ID_VP8,
     118             :     .write_header = ivf_write_header,
     119             :     .write_packet = ivf_write_packet,
     120             :     .write_trailer = ivf_write_trailer,
     121             :     .check_bitstream = ivf_check_bitstream,
     122             :     .codec_tag    = (const AVCodecTag* const []){ codec_ivf_tags, 0 },
     123             : };

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