LCOV - code coverage report
Current view: top level - libavformat - genh.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 3 110 2.7 %
Date: 2017-12-18 20:14:19 Functions: 1 3 33.3 %

          Line data    Source code
       1             : /*
       2             :  * GENH demuxer
       3             :  * Copyright (c) 2015 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 "libavcodec/internal.h"
      24             : #include "avformat.h"
      25             : #include "internal.h"
      26             : 
      27             : typedef struct GENHDemuxContext {
      28             :     unsigned dsp_int_type;
      29             :     unsigned interleave_size;
      30             : } GENHDemuxContext;
      31             : 
      32        6130 : static int genh_probe(AVProbeData *p)
      33             : {
      34        6130 :     if (AV_RL32(p->buf) != MKTAG('G','E','N','H'))
      35        6130 :         return 0;
      36           0 :     if (AV_RL32(p->buf+4) <= 0 || AV_RL32(p->buf+4) > 0xFFFF) // channels
      37           0 :         return 0;
      38             : 
      39           0 :     return AVPROBE_SCORE_MAX / 3 * 2;
      40             : }
      41             : 
      42           0 : static int genh_read_header(AVFormatContext *s)
      43             : {
      44             :     unsigned start_offset, header_size, codec, coef_type, coef[2];
      45           0 :     GENHDemuxContext *c = s->priv_data;
      46             :     av_unused unsigned coef_splitted[2];
      47             :     int align, ch, ret;
      48             :     AVStream *st;
      49             : 
      50           0 :     avio_skip(s->pb, 4);
      51             : 
      52           0 :     st = avformat_new_stream(s, NULL);
      53           0 :     if (!st)
      54           0 :         return AVERROR(ENOMEM);
      55             : 
      56           0 :     st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;
      57           0 :     st->codecpar->channels    = avio_rl32(s->pb);
      58           0 :     if (st->codecpar->channels <= 0 || st->codecpar->channels > FF_SANE_NB_CHANNELS)
      59           0 :         return AVERROR_INVALIDDATA;
      60           0 :     if (st->codecpar->channels == 1)
      61           0 :         st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
      62           0 :     else if (st->codecpar->channels == 2)
      63           0 :         st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
      64           0 :     align                  =
      65           0 :     c->interleave_size     = avio_rl32(s->pb);
      66           0 :     if (align < 0 || align > INT_MAX / st->codecpar->channels)
      67           0 :         return AVERROR_INVALIDDATA;
      68           0 :     st->codecpar->block_align = align * st->codecpar->channels;
      69           0 :     st->codecpar->sample_rate = avio_rl32(s->pb);
      70           0 :     avio_skip(s->pb, 4);
      71           0 :     st->duration = avio_rl32(s->pb);
      72             : 
      73           0 :     codec = avio_rl32(s->pb);
      74           0 :     switch (codec) {
      75           0 :     case  0: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX;        break;
      76           0 :     case  1:
      77           0 :     case 11: st->codecpar->bits_per_coded_sample = 4;
      78           0 :              st->codecpar->block_align = 36 * st->codecpar->channels;
      79           0 :              st->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_WAV;    break;
      80           0 :     case  2: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_DTK;        break;
      81           0 :     case  3: st->codecpar->codec_id = st->codecpar->block_align > 0 ?
      82           0 :                                    AV_CODEC_ID_PCM_S16BE_PLANAR :
      83           0 :                                    AV_CODEC_ID_PCM_S16BE;        break;
      84           0 :     case  4: st->codecpar->codec_id = st->codecpar->block_align > 0 ?
      85           0 :                                    AV_CODEC_ID_PCM_S16LE_PLANAR :
      86           0 :                                    AV_CODEC_ID_PCM_S16LE;        break;
      87           0 :     case  5: st->codecpar->codec_id = st->codecpar->block_align > 0 ?
      88           0 :                                    AV_CODEC_ID_PCM_S8_PLANAR :
      89           0 :                                    AV_CODEC_ID_PCM_S8;           break;
      90           0 :     case  6: st->codecpar->codec_id = AV_CODEC_ID_SDX2_DPCM;        break;
      91           0 :     case  7: ret = ff_alloc_extradata(st->codecpar, 2);
      92           0 :              if (ret < 0)
      93           0 :                  return ret;
      94           0 :              AV_WL16(st->codecpar->extradata, 3);
      95           0 :              st->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_WS;     break;
      96           0 :     case 10: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_AICA;       break;
      97           0 :     case 12: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_THP;        break;
      98           0 :     case 13: st->codecpar->codec_id = AV_CODEC_ID_PCM_U8;           break;
      99           0 :     case 17: st->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_QT;     break;
     100           0 :     default:
     101           0 :              avpriv_request_sample(s, "codec %d", codec);
     102           0 :              return AVERROR_PATCHWELCOME;
     103             :     }
     104             : 
     105           0 :     start_offset = avio_rl32(s->pb);
     106           0 :     header_size  = avio_rl32(s->pb);
     107             : 
     108           0 :     if (header_size > start_offset)
     109           0 :         return AVERROR_INVALIDDATA;
     110             : 
     111           0 :     if (header_size == 0)
     112           0 :         start_offset = 0x800;
     113             : 
     114           0 :     coef[0]          = avio_rl32(s->pb);
     115           0 :     coef[1]          = avio_rl32(s->pb);
     116           0 :     c->dsp_int_type  = avio_rl32(s->pb);
     117           0 :     coef_type        = avio_rl32(s->pb);
     118           0 :     coef_splitted[0] = avio_rl32(s->pb);
     119           0 :     coef_splitted[1] = avio_rl32(s->pb);
     120             : 
     121           0 :     if (st->codecpar->codec_id == AV_CODEC_ID_ADPCM_THP) {
     122           0 :         if (st->codecpar->channels > 2) {
     123           0 :             avpriv_request_sample(s, "channels %d>2", st->codecpar->channels);
     124           0 :             return AVERROR_PATCHWELCOME;
     125             :         }
     126             : 
     127           0 :         ff_alloc_extradata(st->codecpar, 32 * st->codecpar->channels);
     128           0 :         for (ch = 0; ch < st->codecpar->channels; ch++) {
     129           0 :             if (coef_type & 1) {
     130           0 :                 avpriv_request_sample(s, "coef_type & 1");
     131           0 :                 return AVERROR_PATCHWELCOME;
     132             :             } else {
     133           0 :                 avio_seek(s->pb, coef[ch], SEEK_SET);
     134           0 :                 avio_read(s->pb, st->codecpar->extradata + 32 * ch, 32);
     135             :             }
     136             :         }
     137             : 
     138           0 :         if (c->dsp_int_type == 1) {
     139           0 :             st->codecpar->block_align = 8 * st->codecpar->channels;
     140           0 :             if (c->interleave_size != 1 &&
     141           0 :                 c->interleave_size != 2 &&
     142           0 :                 c->interleave_size != 4)
     143           0 :                 return AVERROR_INVALIDDATA;
     144             :         }
     145             :     }
     146             : 
     147           0 :     avio_skip(s->pb, start_offset - avio_tell(s->pb));
     148             : 
     149           0 :     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
     150             : 
     151           0 :     return 0;
     152             : }
     153             : 
     154           0 : static int genh_read_packet(AVFormatContext *s, AVPacket *pkt)
     155             : {
     156           0 :     AVCodecParameters *par = s->streams[0]->codecpar;
     157           0 :     GENHDemuxContext *c = s->priv_data;
     158             :     int ret;
     159             : 
     160           0 :     if (c->dsp_int_type == 1 && par->codec_id == AV_CODEC_ID_ADPCM_THP &&
     161           0 :         par->channels > 1) {
     162             :         int i, ch;
     163             : 
     164           0 :         if (avio_feof(s->pb))
     165           0 :             return AVERROR_EOF;
     166           0 :         ret = av_new_packet(pkt, 8 * par->channels);
     167           0 :         if (ret < 0)
     168           0 :             return ret;
     169           0 :         for (i = 0; i < 8 / c->interleave_size; i++) {
     170           0 :             for (ch = 0; ch < par->channels; ch++) {
     171           0 :                 pkt->data[ch * 8 + i*c->interleave_size+0] = avio_r8(s->pb);
     172           0 :                 pkt->data[ch * 8 + i*c->interleave_size+1] = avio_r8(s->pb);
     173             :             }
     174             :         }
     175           0 :         ret = 0;
     176           0 :     } else if (par->codec_id == AV_CODEC_ID_SDX2_DPCM) {
     177           0 :         ret = av_get_packet(s->pb, pkt, par->block_align * 1024);
     178             : 
     179             :     } else {
     180           0 :         ret = av_get_packet(s->pb, pkt, par->block_align ? par->block_align : 1024 * par->channels);
     181             :     }
     182             : 
     183           0 :     pkt->stream_index = 0;
     184           0 :     return ret;
     185             : }
     186             : 
     187             : AVInputFormat ff_genh_demuxer = {
     188             :     .name           = "genh",
     189             :     .long_name      = NULL_IF_CONFIG_SMALL("GENeric Header"),
     190             :     .priv_data_size = sizeof(GENHDemuxContext),
     191             :     .read_probe     = genh_probe,
     192             :     .read_header    = genh_read_header,
     193             :     .read_packet    = genh_read_packet,
     194             :     .extensions     = "genh",
     195             : };

Generated by: LCOV version 1.13