LCOV - code coverage report
Current view: top level - libavformat - rsd.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 57 120 47.5 %
Date: 2017-12-16 13:57:32 Functions: 3 3 100.0 %

          Line data    Source code
       1             : /*
       2             :  * RSD demuxer
       3             :  * Copyright (c) 2013 James Almer
       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 "libavcodec/bytestream.h"
      23             : #include "libavutil/intreadwrite.h"
      24             : #include "avformat.h"
      25             : #include "avio.h"
      26             : #include "internal.h"
      27             : 
      28             : static const AVCodecTag rsd_tags[] = {
      29             :     { AV_CODEC_ID_ADPCM_PSX,       MKTAG('V','A','G',' ') },
      30             :     { AV_CODEC_ID_ADPCM_THP_LE,    MKTAG('G','A','D','P') },
      31             :     { AV_CODEC_ID_ADPCM_THP,       MKTAG('W','A','D','P') },
      32             :     { AV_CODEC_ID_ADPCM_IMA_RAD,   MKTAG('R','A','D','P') },
      33             :     { AV_CODEC_ID_ADPCM_IMA_WAV,   MKTAG('X','A','D','P') },
      34             :     { AV_CODEC_ID_PCM_S16BE,       MKTAG('P','C','M','B') },
      35             :     { AV_CODEC_ID_PCM_S16LE,       MKTAG('P','C','M',' ') },
      36             :     { AV_CODEC_ID_XMA2,            MKTAG('X','M','A',' ') },
      37             :     { AV_CODEC_ID_NONE, 0 },
      38             : };
      39             : 
      40             : static const uint32_t rsd_unsupported_tags[] = {
      41             :     MKTAG('O','G','G',' '),
      42             : };
      43             : 
      44        6130 : static int rsd_probe(AVProbeData *p)
      45             : {
      46        6130 :     if (memcmp(p->buf, "RSD", 3) || p->buf[3] - '0' < 2 || p->buf[3] - '0' > 6)
      47        6128 :         return 0;
      48           2 :     if (AV_RL32(p->buf +  8) > 256 || !AV_RL32(p->buf +  8))
      49           0 :         return AVPROBE_SCORE_MAX / 8;
      50           2 :     if (AV_RL32(p->buf + 16) > 8*48000 || !AV_RL32(p->buf + 16))
      51           0 :         return AVPROBE_SCORE_MAX / 8;
      52           2 :     return AVPROBE_SCORE_MAX;
      53             : }
      54             : 
      55           2 : static int rsd_read_header(AVFormatContext *s)
      56             : {
      57           2 :     AVIOContext *pb = s->pb;
      58           2 :     int i, ret, version, start = 0x800;
      59             :     AVCodecParameters *par;
      60           2 :     AVStream *st = avformat_new_stream(s, NULL);
      61             : 
      62           2 :     if (!st)
      63           0 :         return AVERROR(ENOMEM);
      64             : 
      65           2 :     avio_skip(pb, 3); // "RSD"
      66           2 :     version = avio_r8(pb) - '0';
      67             : 
      68           2 :     par = st->codecpar;
      69           2 :     par->codec_type = AVMEDIA_TYPE_AUDIO;
      70           2 :     par->codec_tag  = avio_rl32(pb);
      71           2 :     par->codec_id   = ff_codec_get_id(rsd_tags, par->codec_tag);
      72           2 :     if (!par->codec_id) {
      73           0 :         const char *tag_buf = av_fourcc2str(par->codec_tag);
      74           0 :         for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) {
      75           0 :             if (par->codec_tag == rsd_unsupported_tags[i]) {
      76           0 :                 avpriv_request_sample(s, "Codec tag: %s", tag_buf);
      77           0 :                 return AVERROR_PATCHWELCOME;
      78             :             }
      79             :         }
      80           0 :         av_log(s, AV_LOG_ERROR, "Unknown codec tag: %s\n", tag_buf);
      81           0 :         return AVERROR_INVALIDDATA;
      82             :     }
      83             : 
      84           2 :     par->channels = avio_rl32(pb);
      85           2 :     if (par->channels <= 0 || par->channels > INT_MAX / 36) {
      86           0 :         av_log(s, AV_LOG_ERROR, "Invalid number of channels: %d\n", par->channels);
      87           0 :         return AVERROR_INVALIDDATA;
      88             :     }
      89             : 
      90           2 :     avio_skip(pb, 4); // Bit depth
      91           2 :     par->sample_rate = avio_rl32(pb);
      92           2 :     if (!par->sample_rate)
      93           0 :         return AVERROR_INVALIDDATA;
      94             : 
      95           2 :     avio_skip(pb, 4); // Unknown
      96             : 
      97           2 :     switch (par->codec_id) {
      98           0 :     case AV_CODEC_ID_XMA2:
      99           0 :         par->block_align = 2048;
     100           0 :         ff_alloc_extradata(par, 34);
     101           0 :         if (!par->extradata)
     102           0 :             return AVERROR(ENOMEM);
     103           0 :         memset(par->extradata, 0, 34);
     104           0 :         break;
     105           0 :     case AV_CODEC_ID_ADPCM_PSX:
     106           0 :         par->block_align = 16 * par->channels;
     107           0 :         if (pb->seekable & AVIO_SEEKABLE_NORMAL)
     108           0 :             st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
     109           0 :         break;
     110           1 :     case AV_CODEC_ID_ADPCM_IMA_RAD:
     111           1 :         par->block_align = 20 * par->channels;
     112           1 :         if (pb->seekable & AVIO_SEEKABLE_NORMAL)
     113           1 :             st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
     114           1 :         break;
     115           0 :     case AV_CODEC_ID_ADPCM_IMA_WAV:
     116           0 :         if (version == 2)
     117           0 :             start = avio_rl32(pb);
     118             : 
     119           0 :         par->bits_per_coded_sample = 4;
     120           0 :         par->block_align = 36 * par->channels;
     121           0 :         if (pb->seekable & AVIO_SEEKABLE_NORMAL)
     122           0 :             st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
     123           0 :         break;
     124           1 :     case AV_CODEC_ID_ADPCM_THP_LE:
     125             :         /* RSD3GADP is mono, so only alloc enough memory
     126             :            to store the coeff table for a single channel. */
     127             : 
     128           1 :         start = avio_rl32(pb);
     129             : 
     130           1 :         if ((ret = ff_get_extradata(s, par, s->pb, 32)) < 0)
     131           0 :             return ret;
     132           1 :         if (pb->seekable & AVIO_SEEKABLE_NORMAL)
     133           1 :             st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
     134           1 :         break;
     135           0 :     case AV_CODEC_ID_ADPCM_THP:
     136           0 :         par->block_align = 8 * par->channels;
     137           0 :         avio_skip(s->pb, 0x1A4 - avio_tell(s->pb));
     138             : 
     139           0 :         if ((ret = ff_alloc_extradata(st->codecpar, 32 * par->channels)) < 0)
     140           0 :             return ret;
     141             : 
     142           0 :         for (i = 0; i < par->channels; i++) {
     143           0 :             avio_read(s->pb, st->codecpar->extradata + 32 * i, 32);
     144           0 :             avio_skip(s->pb, 8);
     145             :         }
     146           0 :         if (pb->seekable & AVIO_SEEKABLE_NORMAL)
     147           0 :             st->duration = (avio_size(pb) - start) / (8 * par->channels) * 14;
     148           0 :         break;
     149           0 :     case AV_CODEC_ID_PCM_S16LE:
     150             :     case AV_CODEC_ID_PCM_S16BE:
     151           0 :         if (version != 4)
     152           0 :             start = avio_rl32(pb);
     153             : 
     154           0 :         if (pb->seekable & AVIO_SEEKABLE_NORMAL)
     155           0 :             st->duration = (avio_size(pb) - start) / 2 / par->channels;
     156           0 :         break;
     157             :     }
     158             : 
     159           2 :     avio_skip(pb, start - avio_tell(pb));
     160           2 :     if (par->codec_id == AV_CODEC_ID_XMA2) {
     161           0 :         avio_skip(pb, avio_rb32(pb) + avio_rb32(pb));
     162           0 :         st->duration = avio_rb32(pb);
     163             :     }
     164             : 
     165           2 :     avpriv_set_pts_info(st, 64, 1, par->sample_rate);
     166             : 
     167           2 :     return 0;
     168             : }
     169             : 
     170        1006 : static int rsd_read_packet(AVFormatContext *s, AVPacket *pkt)
     171             : {
     172        1006 :     AVCodecParameters *par = s->streams[0]->codecpar;
     173        1006 :     int ret, size = 1024;
     174             :     int64_t pos;
     175             : 
     176        1006 :     if (avio_feof(s->pb))
     177           2 :         return AVERROR_EOF;
     178             : 
     179        1004 :     pos = avio_tell(s->pb);
     180        1007 :     if (par->codec_id == AV_CODEC_ID_ADPCM_IMA_RAD ||
     181           6 :         par->codec_id == AV_CODEC_ID_ADPCM_PSX     ||
     182           6 :         par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV ||
     183           3 :         par->codec_id == AV_CODEC_ID_XMA2) {
     184        1001 :         ret = av_get_packet(s->pb, pkt, par->block_align);
     185           3 :     } else if (par->codec_tag == MKTAG('W','A','D','P') &&
     186           0 :                par->channels > 1) {
     187             :         int i, ch;
     188             : 
     189           0 :         ret = av_new_packet(pkt, par->block_align);
     190           0 :         if (ret < 0)
     191           0 :             return ret;
     192           0 :         for (i = 0; i < 4; i++) {
     193           0 :             for (ch = 0; ch < par->channels; ch++) {
     194           0 :                 pkt->data[ch * 8 + i * 2 + 0] = avio_r8(s->pb);
     195           0 :                 pkt->data[ch * 8 + i * 2 + 1] = avio_r8(s->pb);
     196             :             }
     197             :         }
     198           0 :         ret = 0;
     199             :     } else {
     200           3 :         ret = av_get_packet(s->pb, pkt, size);
     201             :     }
     202             : 
     203        1004 :     if (par->codec_id == AV_CODEC_ID_XMA2 && pkt->size >= 1)
     204           0 :         pkt->duration = (pkt->data[0] >> 2) * 512;
     205             : 
     206        1004 :     pkt->pos = pos;
     207        1004 :     pkt->stream_index = 0;
     208             : 
     209        1004 :     return ret;
     210             : }
     211             : 
     212             : AVInputFormat ff_rsd_demuxer = {
     213             :     .name           =   "rsd",
     214             :     .long_name      =   NULL_IF_CONFIG_SMALL("GameCube RSD"),
     215             :     .read_probe     =   rsd_probe,
     216             :     .read_header    =   rsd_read_header,
     217             :     .read_packet    =   rsd_read_packet,
     218             :     .extensions     =   "rsd",
     219             :     .codec_tag      =   (const AVCodecTag* const []){rsd_tags, 0},
     220             :     .flags          =   AVFMT_GENERIC_INDEX,
     221             : };

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