LCOV - code coverage report
Current view: top level - libavformat - sdr2.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 3 51 5.9 %
Date: 2017-12-11 04:34:20 Functions: 1 3 33.3 %

          Line data    Source code
       1             : /*
       2             :  * SDR2 demuxer
       3             :  * Copyright (c) 2014 Paul B Mahol
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : #include "libavutil/intreadwrite.h"
      23             : #include "avformat.h"
      24             : #include "internal.h"
      25             : 
      26        6130 : static int sdr2_probe(AVProbeData *p)
      27             : {
      28        6130 :     if (AV_RL32(p->buf) != MKTAG('S', 'R', 'A', 1))
      29        6130 :         return 0;
      30             : 
      31           0 :     return AVPROBE_SCORE_EXTENSION;
      32             : }
      33             : 
      34             : #define FIRST 0xA8
      35             : 
      36           0 : static int sdr2_read_header(AVFormatContext *s)
      37             : {
      38             :     AVStream *st, *ast;
      39             : 
      40           0 :     ast = avformat_new_stream(s, 0);
      41           0 :     if (!ast)
      42           0 :         return AVERROR(ENOMEM);
      43             : 
      44           0 :     st = avformat_new_stream(s, 0);
      45           0 :     if (!st)
      46           0 :         return AVERROR(ENOMEM);
      47             : 
      48           0 :     avio_skip(s->pb, 20);
      49           0 :     avpriv_set_pts_info(st, 64, 1, avio_rl32(s->pb));
      50           0 :     st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
      51           0 :     st->codecpar->width      = avio_rl32(s->pb);
      52           0 :     st->codecpar->height     = avio_rl32(s->pb);
      53           0 :     st->codecpar->codec_id   = AV_CODEC_ID_H264;
      54           0 :     st->need_parsing      = AVSTREAM_PARSE_FULL;
      55             : 
      56           0 :     ast->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
      57           0 :     ast->codecpar->channels    = 1;
      58           0 :     ast->codecpar->sample_rate = 8000;
      59           0 :     ast->codecpar->codec_id    = AV_CODEC_ID_PCM_S16LE;
      60           0 :     avpriv_set_pts_info(ast, 64, 1, 8000);
      61             : 
      62           0 :     avio_seek(s->pb, FIRST, SEEK_SET);
      63             : 
      64           0 :     return 0;
      65             : }
      66             : 
      67             : static const uint8_t header[24] = {
      68             :     0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1e,
      69             :     0xa6, 0x80, 0xb0, 0x7e, 0x40, 0x00, 0x00, 0x00,
      70             :     0x01, 0x68, 0xce, 0x38, 0x80, 0x00, 0x00, 0x00
      71             : };
      72             : 
      73           0 : static int sdr2_read_packet(AVFormatContext *s, AVPacket *pkt)
      74             : {
      75             :     int64_t pos;
      76             :     unsigned next;
      77           0 :     int flags, ret = 0, is_video;
      78             : 
      79           0 :     pos = avio_tell(s->pb);
      80             : 
      81           0 :     flags = avio_rl32(s->pb);
      82           0 :     avio_skip(s->pb, 4);
      83             : 
      84           0 :     next = avio_rl32(s->pb);
      85           0 :     if (next <= 52)
      86           0 :         return AVERROR_INVALIDDATA;
      87             : 
      88           0 :     avio_skip(s->pb, 6);
      89           0 :     is_video = avio_rl32(s->pb);
      90           0 :     avio_skip(s->pb, 30);
      91             : 
      92           0 :     if (pos == FIRST) {
      93           0 :         if (av_new_packet(pkt, next - 52 + 24) < 0)
      94           0 :             return AVERROR(ENOMEM);
      95           0 :         memcpy(pkt->data, header, 24);
      96           0 :         ret = avio_read(s->pb, pkt->data + 24, next - 52);
      97           0 :         if (ret < 0) {
      98           0 :             av_packet_unref(pkt);
      99           0 :             return ret;
     100             :         }
     101           0 :         av_shrink_packet(pkt, ret + 24);
     102             :     } else {
     103           0 :         ret = av_get_packet(s->pb, pkt, next - 52);
     104             :     }
     105           0 :     pkt->stream_index = !!is_video;
     106           0 :     pkt->pos = pos;
     107           0 :     if (flags & (1 << 12))
     108           0 :         pkt->flags |= AV_PKT_FLAG_KEY;
     109             : 
     110           0 :     return ret;
     111             : }
     112             : 
     113             : AVInputFormat ff_sdr2_demuxer = {
     114             :     .name        = "sdr2",
     115             :     .long_name   = NULL_IF_CONFIG_SMALL("SDR2"),
     116             :     .read_probe  = sdr2_probe,
     117             :     .read_header = sdr2_read_header,
     118             :     .read_packet = sdr2_read_packet,
     119             :     .extensions  = "sdr2",
     120             :     .flags       = AVFMT_GENERIC_INDEX,
     121             : };

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