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 "libavutil/intreadwrite.h"
  23 #include "avformat.h"
  24 #include "avio.h"
  25 #include "demux.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(const 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         const char *tag_buf = av_fourcc2str(par->codec_tag);
  74         for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) {
  75             if (par->codec_tag == rsd_unsupported_tags[i]) {
  76                 avpriv_request_sample(s, "Codec tag: %s", tag_buf);
  77                 return AVERROR_PATCHWELCOME;
  78             }
  79         }
  80         av_log(s, AV_LOG_ERROR, "Unknown codec tag: %s\n", tag_buf);
  81         return AVERROR_INVALIDDATA;
  82     }
  83
  84     par->ch_layout.nb_channels = avio_rl32(pb);
  85     if (par->ch_layout.nb_channels <= 0 || par->ch_layout.nb_channels > INT_MAX / 36) {
  86         av_log(s, AV_LOG_ERROR, "Invalid number of channels: %d\n", par->ch_layout.nb_channels);
  87         return AVERROR_INVALIDDATA;
  88     }
  89
  90     avio_skip(pb, 4); // Bit depth
  91     par->sample_rate = avio_rl32(pb);
  92     if (!par->sample_rate)
  93         return AVERROR_INVALIDDATA;
  94
  95     avio_skip(pb, 4); // Unknown
  96
  97     switch (par->codec_id) {
  98     case AV_CODEC_ID_XMA2:
  99         par->block_align = 2048;
 100         if ((ret = ff_alloc_extradata(par, 34)) < 0)
 101             return ret;
 102         memset(par->extradata, 0, 34);
 103         break;
 104     case AV_CODEC_ID_ADPCM_PSX:
 105         par->block_align = 16 * par->ch_layout.nb_channels;
 106         break;
 107     case AV_CODEC_ID_ADPCM_IMA_RAD:
 108         par->block_align = 20 * par->ch_layout.nb_channels;
 109         break;
 110     case AV_CODEC_ID_ADPCM_IMA_WAV:
 111         if (version == 2)
 112             start = avio_rl32(pb);
 113
 114         par->bits_per_coded_sample = 4;
 115         par->block_align = 36 * par->ch_layout.nb_channels;
 116         break;
 117     case AV_CODEC_ID_ADPCM_THP_LE:
 118         /* RSD3GADP is mono, so only alloc enough memory
 119            to store the coeff table for a single channel. */
 120
 121         start = avio_rl32(pb);
 122
 123         if ((ret = ff_get_extradata(s, par, s->pb, 32)) < 0)
 124             return ret;
 125         break;
 126     case AV_CODEC_ID_ADPCM_THP:
 127         par->block_align = 8 * par->ch_layout.nb_channels;
 128         avio_skip(s->pb, 0x1A4 - avio_tell(s->pb));
 129
 130         if ((ret = ff_alloc_extradata(st->codecpar, 32 * par->ch_layout.nb_channels)) < 0)
 131             return ret;
 132
 133         for (i = 0; i < par->ch_layout.nb_channels; i++) {
 134             if (avio_feof(pb))
 135                 return AVERROR_EOF;
 136             avio_read(s->pb, st->codecpar->extradata + 32 * i, 32);
 137             avio_skip(s->pb, 8);
 138         }
 139         break;
 140     case AV_CODEC_ID_PCM_S16LE:
 141     case AV_CODEC_ID_PCM_S16BE:
 142         if (version != 4)
 143             start = avio_rl32(pb);
 144
 145         break;
 146     }
 147     if (start < 0)
 148         return AVERROR_INVALIDDATA;
 149
 150     if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
 151         int64_t remaining = avio_size(pb);
 152
 153         if (remaining >= start && remaining - start <= INT_MAX)
 154             switch (par->codec_id) {
 155             case AV_CODEC_ID_ADPCM_PSX:
 156             case AV_CODEC_ID_ADPCM_IMA_RAD:
 157             case AV_CODEC_ID_ADPCM_IMA_WAV:
 158             case AV_CODEC_ID_ADPCM_THP_LE:
 159                 st->duration = av_get_audio_frame_duration2(par, remaining - start);
 160                 break;
 161             case AV_CODEC_ID_ADPCM_THP:
 162                 st->duration = (remaining - start) / (8 * par->ch_layout.nb_channels) * 14;
 163                 break;
 164             case AV_CODEC_ID_PCM_S16LE:
 165             case AV_CODEC_ID_PCM_S16BE:
 166                 st->duration = (remaining - start) / 2 / par->ch_layout.nb_channels;
 167             }
 168     }
 169
 170     avio_skip(pb, start - avio_tell(pb));
 171     if (par->codec_id == AV_CODEC_ID_XMA2) {
 172         avio_skip(pb, avio_rb32(pb) + avio_rb32(pb));
 173         st->duration = avio_rb32(pb);
 174     }
 175
 176     avpriv_set_pts_info(st, 64, 1, par->sample_rate);
 177
 178     return 0;
 179 }
 180
 181 static int rsd_read_packet(AVFormatContext *s, AVPacket *pkt)
 182 {
 183     AVCodecParameters *par = s->streams[0]->codecpar;
 184     int ret, size = 1024;
 185     int64_t pos;
 186
 187     if (avio_feof(s->pb))
 188         return AVERROR_EOF;
 189
 190     pos = avio_tell(s->pb);
 191     if (par->codec_id == AV_CODEC_ID_ADPCM_IMA_RAD ||
 192         par->codec_id == AV_CODEC_ID_ADPCM_PSX     ||
 193         par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV ||
 194         par->codec_id == AV_CODEC_ID_XMA2) {
 195         ret = av_get_packet(s->pb, pkt, par->block_align);
 196     } else if (par->codec_tag == MKTAG('W','A','D','P') &&
 197                par->ch_layout.nb_channels > 1) {
 198         int i, ch;
 199
 200         ret = av_new_packet(pkt, par->block_align);
 201         if (ret < 0)
 202             return ret;
 203         for (i = 0; i < 4; i++) {
 204             for (ch = 0; ch < par->ch_layout.nb_channels; ch++) {
 205                 pkt->data[ch * 8 + i * 2 + 0] = avio_r8(s->pb);
 206                 pkt->data[ch * 8 + i * 2 + 1] = avio_r8(s->pb);
 207             }
 208         }
 209         ret = 0;
 210     } else {
 211         ret = av_get_packet(s->pb, pkt, size);
 212     }
 213
 214     if (par->codec_id == AV_CODEC_ID_XMA2 && pkt->size >= 1)
 215         pkt->duration = (pkt->data[0] >> 2) * 512;
 216
 217     pkt->pos = pos;
 218     pkt->stream_index = 0;
 219
 220     return ret;
 221 }
 222
 223 const FFInputFormat ff_rsd_demuxer = {
 224     .p.name         =   "rsd",
 225     .p.long_name    =   NULL_IF_CONFIG_SMALL("GameCube RSD"),
 226     .p.extensions   =   "rsd",
 227     .p.codec_tag    =   (const AVCodecTag* const []){rsd_tags, 0},
 228     .p.flags        =   AVFMT_GENERIC_INDEX,
 229     .read_probe     =   rsd_probe,
 230     .read_header    =   rsd_read_header,
 231     .read_packet    =   rsd_read_packet,
 232 };