libavformat/rsd.c

   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 static int rsd_probe(AVProbeData *p)
  45 {
  46     if (memcmp(p->buf, "RSD", 3) || p->buf[3] - '0' < 2 || p->buf[3] - '0' > 6)
  47         return 0;
  48     if (AV_RL32(p->buf +  8) > 256 || !AV_RL32(p->buf +  8))
  49         return AVPROBE_SCORE_MAX / 8;
  50     if (AV_RL32(p->buf + 16) > 8*48000 || !AV_RL32(p->buf + 16))
  51         return AVPROBE_SCORE_MAX / 8;
  52     return AVPROBE_SCORE_MAX;
  53 }
  54
  55 static int rsd_read_header(AVFormatContext *s)
  56 {
  57     AVIOContext *pb = s->pb;
  58     int i, ret, version, start = 0x800;
  59     AVCodecParameters *par;
  60     AVStream *st = avformat_new_stream(s, NULL);
  61
  62     if (!st)
  63         return AVERROR(ENOMEM);
  64
  65     avio_skip(pb, 3); // "RSD"
  66     version = avio_r8(pb) - '0';
  67
  68     par = st->codecpar;
  69     par->codec_type = AVMEDIA_TYPE_AUDIO;
  70     par->codec_tag  = avio_rl32(pb);
  71     par->codec_id   = ff_codec_get_id(rsd_tags, par->codec_tag);
  72     if (!par->codec_id) {
  73         char tag_buf[32];
  74
  75         av_get_codec_tag_string(tag_buf, sizeof(tag_buf), par->codec_tag);
  76         for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) {
  77             if (par->codec_tag == rsd_unsupported_tags[i]) {
  78                 avpriv_request_sample(s, "Codec tag: %s", tag_buf);
  79                 return AVERROR_PATCHWELCOME;
  80             }
  81         }
  82         av_log(s, AV_LOG_ERROR, "Unknown codec tag: %s\n", tag_buf);
  83         return AVERROR_INVALIDDATA;
  84     }
  85
  86     par->channels = avio_rl32(pb);
  87     if (par->channels <= 0 || par->channels > INT_MAX / 36) {
  88         av_log(s, AV_LOG_ERROR, "Invalid number of channels: %d\n", par->channels);
  89         return AVERROR_INVALIDDATA;
  90     }
  91
  92     avio_skip(pb, 4); // Bit depth
  93     par->sample_rate = avio_rl32(pb);
  94     if (!par->sample_rate)
  95         return AVERROR_INVALIDDATA;
  96
  97     avio_skip(pb, 4); // Unknown
  98
  99     switch (par->codec_id) {
 100     case AV_CODEC_ID_XMA2:
 101         par->block_align = 2048;
 102         ff_alloc_extradata(par, 34);
 103         if (!par->extradata)
 104             return AVERROR(ENOMEM);
 105         memset(par->extradata, 0, 34);
 106         break;
 107     case AV_CODEC_ID_ADPCM_PSX:
 108         par->block_align = 16 * par->channels;
 109         if (pb->seekable)
 110             st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
 111         break;
 112     case AV_CODEC_ID_ADPCM_IMA_RAD:
 113         par->block_align = 20 * par->channels;
 114         if (pb->seekable)
 115             st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
 116         break;
 117     case AV_CODEC_ID_ADPCM_IMA_WAV:
 118         if (version == 2)
 119             start = avio_rl32(pb);
 120
 121         par->bits_per_coded_sample = 4;
 122         par->block_align = 36 * par->channels;
 123         if (pb->seekable)
 124             st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
 125         break;
 126     case AV_CODEC_ID_ADPCM_THP_LE:
 127         /* RSD3GADP is mono, so only alloc enough memory
 128            to store the coeff table for a single channel. */
 129
 130         start = avio_rl32(pb);
 131
 132         if ((ret = ff_get_extradata(s, par, s->pb, 32)) < 0)
 133             return ret;
 134         if (pb->seekable)
 135             st->duration = av_get_audio_frame_duration2(par, avio_size(pb) - start);
 136         break;
 137     case AV_CODEC_ID_ADPCM_THP:
 138         par->block_align = 8 * par->channels;
 139         avio_skip(s->pb, 0x1A4 - avio_tell(s->pb));
 140
 141         if ((ret = ff_alloc_extradata(st->codecpar, 32 * par->channels)) < 0)
 142             return ret;
 143
 144         for (i = 0; i < par->channels; i++) {
 145             if (avio_feof(pb))
 146                 return AVERROR_EOF;
 147             avio_read(s->pb, st->codecpar->extradata + 32 * i, 32);
 148             avio_skip(s->pb, 8);
 149         }
 150         if (pb->seekable)
 151             st->duration = (avio_size(pb) - start) / (8 * par->channels) * 14;
 152         break;
 153     case AV_CODEC_ID_PCM_S16LE:
 154     case AV_CODEC_ID_PCM_S16BE:
 155         if (version != 4)
 156             start = avio_rl32(pb);
 157
 158         if (pb->seekable)
 159             st->duration = (avio_size(pb) - start) / 2 / par->channels;
 160         break;
 161     }
 162
 163     avio_skip(pb, start - avio_tell(pb));
 164     if (par->codec_id == AV_CODEC_ID_XMA2) {
 165         avio_skip(pb, avio_rb32(pb) + avio_rb32(pb));
 166         st->duration = avio_rb32(pb);
 167     }
 168
 169     avpriv_set_pts_info(st, 64, 1, par->sample_rate);
 170
 171     return 0;
 172 }
 173
 174 static int rsd_read_packet(AVFormatContext *s, AVPacket *pkt)
 175 {
 176     AVCodecParameters *par = s->streams[0]->codecpar;
 177     int ret, size = 1024;
 178     int64_t pos;
 179
 180     if (avio_feof(s->pb))
 181         return AVERROR_EOF;
 182
 183     pos = avio_tell(s->pb);
 184     if (par->codec_id == AV_CODEC_ID_ADPCM_IMA_RAD ||
 185         par->codec_id == AV_CODEC_ID_ADPCM_PSX     ||
 186         par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV ||
 187         par->codec_id == AV_CODEC_ID_XMA2) {
 188         ret = av_get_packet(s->pb, pkt, par->block_align);
 189     } else if (par->codec_tag == MKTAG('W','A','D','P') &&
 190                par->channels > 1) {
 191         int i, ch;
 192
 193         ret = av_new_packet(pkt, par->block_align);
 194         if (ret < 0)
 195             return ret;
 196         for (i = 0; i < 4; i++) {
 197             for (ch = 0; ch < par->channels; ch++) {
 198                 pkt->data[ch * 8 + i * 2 + 0] = avio_r8(s->pb);
 199                 pkt->data[ch * 8 + i * 2 + 1] = avio_r8(s->pb);
 200             }
 201         }
 202         ret = 0;
 203     } else {
 204         ret = av_get_packet(s->pb, pkt, size);
 205     }
 206
 207     if (par->codec_id == AV_CODEC_ID_XMA2 && pkt->size >= 1)
 208         pkt->duration = (pkt->data[0] >> 2) * 512;
 209
 210     pkt->pos = pos;
 211     pkt->stream_index = 0;
 212
 213     return ret;
 214 }
 215
 216 AVInputFormat ff_rsd_demuxer = {
 217     .name           =   "rsd",
 218     .long_name      =   NULL_IF_CONFIG_SMALL("GameCube RSD"),
 219     .read_probe     =   rsd_probe,
 220     .read_header    =   rsd_read_header,
 221     .read_packet    =   rsd_read_packet,
 222     .extensions     =   "rsd",
 223     .codec_tag      =   (const AVCodecTag* const []){rsd_tags, 0},
 224     .flags          =   AVFMT_GENERIC_INDEX,
 225 };