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 28static 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 40static const uint32_t rsd_unsupported_tags[] = { 41 MKTAG('O','G','G',' '), 42}; 43 44static 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 55static 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 181static 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 223const AVInputFormat ff_rsd_demuxer = { 224 .name = "rsd", 225 .long_name = NULL_IF_CONFIG_SMALL("GameCube RSD"), 226 .read_probe = rsd_probe, 227 .read_header = rsd_read_header, 228 .read_packet = rsd_read_packet, 229 .extensions = "rsd", 230 .codec_tag = (const AVCodecTag* const []){rsd_tags, 0}, 231 .flags = AVFMT_GENERIC_INDEX, 232}; 233