LCOV - code coverage report
Current view: top level - libavformat - vocenc.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 39 47 83.0 %
Date: 2017-12-18 06:23:41 Functions: 3 3 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Creative Voice File muxer.
       3             :  * Copyright (c) 2006  Aurelien Jacobs <aurel@gnuage.org>
       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 "voc.h"
      23             : #include "internal.h"
      24             : 
      25             : 
      26             : typedef struct voc_enc_context {
      27             :     int param_written;
      28             : } VocEncContext;
      29             : 
      30           2 : static int voc_write_header(AVFormatContext *s)
      31             : {
      32           2 :     AVIOContext *pb = s->pb;
      33           2 :     AVCodecParameters *par = s->streams[0]->codecpar;
      34           2 :     const int header_size = 26;
      35           2 :     const int version = 0x0114;
      36             : 
      37           2 :     if (s->nb_streams != 1
      38           2 :         || s->streams[0]->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
      39           0 :         return AVERROR_PATCHWELCOME;
      40             : 
      41           2 :     if (!par->codec_tag && par->codec_id != AV_CODEC_ID_PCM_U8) {
      42           0 :         av_log(s, AV_LOG_ERROR, "unsupported codec\n");
      43           0 :         return AVERROR(EINVAL);
      44             :     }
      45             : 
      46           2 :     avio_write(pb, ff_voc_magic, sizeof(ff_voc_magic) - 1);
      47           2 :     avio_wl16(pb, header_size);
      48           2 :     avio_wl16(pb, version);
      49           2 :     avio_wl16(pb, ~version + 0x1234);
      50             : 
      51           2 :     return 0;
      52             : }
      53             : 
      54          88 : static int voc_write_packet(AVFormatContext *s, AVPacket *pkt)
      55             : {
      56          88 :     VocEncContext *voc = s->priv_data;
      57          88 :     AVCodecParameters *par = s->streams[0]->codecpar;
      58          88 :     AVIOContext *pb = s->pb;
      59             : 
      60          88 :     if (!voc->param_written) {
      61           2 :         if (par->codec_tag > 3) {
      62           1 :             avio_w8(pb, VOC_TYPE_NEW_VOICE_DATA);
      63           1 :             avio_wl24(pb, pkt->size + 12);
      64           1 :             avio_wl32(pb, par->sample_rate);
      65           1 :             avio_w8(pb, par->bits_per_coded_sample);
      66           1 :             avio_w8(pb, par->channels);
      67           1 :             avio_wl16(pb, par->codec_tag);
      68           1 :             avio_wl32(pb, 0);
      69             :         } else {
      70           1 :             if (s->streams[0]->codecpar->channels > 1) {
      71           0 :                 avio_w8(pb, VOC_TYPE_EXTENDED);
      72           0 :                 avio_wl24(pb, 4);
      73           0 :                 avio_wl16(pb, 65536-(256000000 + par->sample_rate*par->channels/2)/(par->sample_rate*par->channels));
      74           0 :                 avio_w8(pb, par->codec_tag);
      75           0 :                 avio_w8(pb, par->channels - 1);
      76             :             }
      77           1 :             avio_w8(pb, VOC_TYPE_VOICE_DATA);
      78           1 :             avio_wl24(pb, pkt->size + 2);
      79           1 :             avio_w8(pb, 256 - (1000000 + par->sample_rate/2) / par->sample_rate);
      80           1 :             avio_w8(pb, par->codec_tag);
      81             :         }
      82           2 :         voc->param_written = 1;
      83             :     } else {
      84          86 :         avio_w8(pb, VOC_TYPE_VOICE_DATA_CONT);
      85          86 :         avio_wl24(pb, pkt->size);
      86             :     }
      87             : 
      88          88 :     avio_write(pb, pkt->data, pkt->size);
      89          88 :     return 0;
      90             : }
      91             : 
      92           2 : static int voc_write_trailer(AVFormatContext *s)
      93             : {
      94           2 :     avio_w8(s->pb, 0);
      95           2 :     return 0;
      96             : }
      97             : 
      98             : AVOutputFormat ff_voc_muxer = {
      99             :     .name              = "voc",
     100             :     .long_name         = NULL_IF_CONFIG_SMALL("Creative Voice"),
     101             :     .mime_type         = "audio/x-voc",
     102             :     .extensions        = "voc",
     103             :     .priv_data_size    = sizeof(VocEncContext),
     104             :     .audio_codec       = AV_CODEC_ID_PCM_S16LE,
     105             :     .video_codec       = AV_CODEC_ID_NONE,
     106             :     .write_header      = voc_write_header,
     107             :     .write_packet      = voc_write_packet,
     108             :     .write_trailer     = voc_write_trailer,
     109             :     .codec_tag         = (const AVCodecTag* const []){ ff_voc_codec_tags, 0 },
     110             :     .flags             = AVFMT_NOTIMESTAMPS,
     111             : };

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