| 1 | /* |
| 2 | * Sony Playstation (PSX) STR File Demuxer |
| 3 | * Copyright (c) 2003 The FFmpeg Project |
| 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 | /** |
| 23 | * @file |
| 24 | * PSX STR file demuxer |
| 25 | * by Mike Melanson (melanson@pcisys.net) |
| 26 | * This module handles streams that have been ripped from Sony Playstation |
| 27 | * CD games. This demuxer can handle either raw STR files (which are just |
| 28 | * concatenations of raw compact disc sectors) or STR files with 0x2C-byte |
| 29 | * RIFF headers, followed by CD sectors. |
| 30 | */ |
| 31 | |
| 32 | #include "libavutil/channel_layout.h" |
| 33 | #include "libavutil/internal.h" |
| 34 | #include "libavutil/intreadwrite.h" |
| 35 | #include "avformat.h" |
| 36 | #include "internal.h" |
| 37 | |
| 38 | #define RIFF_TAG MKTAG('R', 'I', 'F', 'F') |
| 39 | #define CDXA_TAG MKTAG('C', 'D', 'X', 'A') |
| 40 | |
| 41 | #define RAW_CD_SECTOR_SIZE 2352 |
| 42 | #define RAW_CD_SECTOR_DATA_SIZE 2304 |
| 43 | #define VIDEO_DATA_CHUNK_SIZE 0x7E0 |
| 44 | #define VIDEO_DATA_HEADER_SIZE 0x38 |
| 45 | #define RIFF_HEADER_SIZE 0x2C |
| 46 | |
| 47 | #define CDXA_TYPE_MASK 0x0E |
| 48 | #define CDXA_TYPE_DATA 0x08 |
| 49 | #define CDXA_TYPE_AUDIO 0x04 |
| 50 | #define CDXA_TYPE_VIDEO 0x02 |
| 51 | |
| 52 | #define STR_MAGIC (0x80010160) |
| 53 | |
| 54 | typedef struct StrChannel { |
| 55 | /* video parameters */ |
| 56 | int video_stream_index; |
| 57 | AVPacket tmp_pkt; |
| 58 | |
| 59 | /* audio parameters */ |
| 60 | int audio_stream_index; |
| 61 | } StrChannel; |
| 62 | |
| 63 | typedef struct StrDemuxContext { |
| 64 | |
| 65 | /* a STR file can contain up to 32 channels of data */ |
| 66 | StrChannel channels[32]; |
| 67 | } StrDemuxContext; |
| 68 | |
| 69 | static const uint8_t sync_header[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00}; |
| 70 | |
| 71 | static int str_probe(AVProbeData *p) |
| 72 | { |
| 73 | const uint8_t *sector= p->buf; |
| 74 | const uint8_t *end= sector + p->buf_size; |
| 75 | int aud=0, vid=0; |
| 76 | |
| 77 | if (p->buf_size < RAW_CD_SECTOR_SIZE) |
| 78 | return 0; |
| 79 | |
| 80 | if ((AV_RL32(&p->buf[0]) == RIFF_TAG) && |
| 81 | (AV_RL32(&p->buf[8]) == CDXA_TAG)) { |
| 82 | |
| 83 | /* RIFF header seen; skip 0x2C bytes */ |
| 84 | sector += RIFF_HEADER_SIZE; |
| 85 | } |
| 86 | |
| 87 | while (end - sector >= RAW_CD_SECTOR_SIZE) { |
| 88 | /* look for CD sync header (00, 0xFF x 10, 00) */ |
| 89 | if (memcmp(sector,sync_header,sizeof(sync_header))) |
| 90 | return 0; |
| 91 | |
| 92 | if (sector[0x11] >= 32) |
| 93 | return 0; |
| 94 | |
| 95 | switch (sector[0x12] & CDXA_TYPE_MASK) { |
| 96 | case CDXA_TYPE_DATA: |
| 97 | case CDXA_TYPE_VIDEO: { |
| 98 | int current_sector = AV_RL16(§or[0x1C]); |
| 99 | int sector_count = AV_RL16(§or[0x1E]); |
| 100 | int frame_size = AV_RL32(§or[0x24]); |
| 101 | |
| 102 | if(!( frame_size>=0 |
| 103 | && current_sector < sector_count |
| 104 | && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){ |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | /*st->codec->width = AV_RL16(§or[0x28]); |
| 109 | st->codec->height = AV_RL16(§or[0x2A]);*/ |
| 110 | |
| 111 | // if (current_sector == sector_count-1) { |
| 112 | vid++; |
| 113 | // } |
| 114 | |
| 115 | } |
| 116 | break; |
| 117 | case CDXA_TYPE_AUDIO: |
| 118 | if(sector[0x13]&0x2A) |
| 119 | return 0; |
| 120 | aud++; |
| 121 | break; |
| 122 | default: |
| 123 | if(sector[0x12] & CDXA_TYPE_MASK) |
| 124 | return 0; |
| 125 | } |
| 126 | sector += RAW_CD_SECTOR_SIZE; |
| 127 | } |
| 128 | /* MPEG files (like those ripped from VCDs) can also look like this; |
| 129 | * only return half certainty */ |
| 130 | if(vid+aud > 3) return AVPROBE_SCORE_EXTENSION; |
| 131 | else if(vid+aud) return 1; |
| 132 | else return 0; |
| 133 | } |
| 134 | |
| 135 | static int str_read_header(AVFormatContext *s) |
| 136 | { |
| 137 | AVIOContext *pb = s->pb; |
| 138 | StrDemuxContext *str = s->priv_data; |
| 139 | unsigned char sector[RAW_CD_SECTOR_SIZE]; |
| 140 | int start; |
| 141 | int i; |
| 142 | |
| 143 | /* skip over any RIFF header */ |
| 144 | if (avio_read(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE) |
| 145 | return AVERROR(EIO); |
| 146 | if (AV_RL32(§or[0]) == RIFF_TAG) |
| 147 | start = RIFF_HEADER_SIZE; |
| 148 | else |
| 149 | start = 0; |
| 150 | |
| 151 | avio_seek(pb, start, SEEK_SET); |
| 152 | |
| 153 | for(i=0; i<32; i++){ |
| 154 | str->channels[i].video_stream_index= |
| 155 | str->channels[i].audio_stream_index= -1; |
| 156 | } |
| 157 | |
| 158 | s->ctx_flags |= AVFMTCTX_NOHEADER; |
| 159 | |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | static int str_read_packet(AVFormatContext *s, |
| 164 | AVPacket *ret_pkt) |
| 165 | { |
| 166 | AVIOContext *pb = s->pb; |
| 167 | StrDemuxContext *str = s->priv_data; |
| 168 | unsigned char sector[RAW_CD_SECTOR_SIZE]; |
| 169 | int channel; |
| 170 | AVPacket *pkt; |
| 171 | AVStream *st; |
| 172 | |
| 173 | while (1) { |
| 174 | |
| 175 | if (avio_read(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE) |
| 176 | return AVERROR(EIO); |
| 177 | |
| 178 | channel = sector[0x11]; |
| 179 | if (channel >= 32) |
| 180 | return AVERROR_INVALIDDATA; |
| 181 | |
| 182 | switch (sector[0x12] & CDXA_TYPE_MASK) { |
| 183 | |
| 184 | case CDXA_TYPE_DATA: |
| 185 | case CDXA_TYPE_VIDEO: |
| 186 | { |
| 187 | |
| 188 | int current_sector = AV_RL16(§or[0x1C]); |
| 189 | int sector_count = AV_RL16(§or[0x1E]); |
| 190 | int frame_size = AV_RL32(§or[0x24]); |
| 191 | |
| 192 | if(!( frame_size>=0 |
| 193 | && current_sector < sector_count |
| 194 | && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){ |
| 195 | av_log(s, AV_LOG_ERROR, "Invalid parameters %d %d %d\n", current_sector, sector_count, frame_size); |
| 196 | break; |
| 197 | } |
| 198 | |
| 199 | if(str->channels[channel].video_stream_index < 0){ |
| 200 | /* allocate a new AVStream */ |
| 201 | st = avformat_new_stream(s, NULL); |
| 202 | if (!st) |
| 203 | return AVERROR(ENOMEM); |
| 204 | avpriv_set_pts_info(st, 64, 1, 15); |
| 205 | |
| 206 | str->channels[channel].video_stream_index = st->index; |
| 207 | |
| 208 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| 209 | st->codec->codec_id = AV_CODEC_ID_MDEC; |
| 210 | st->codec->codec_tag = 0; /* no fourcc */ |
| 211 | st->codec->width = AV_RL16(§or[0x28]); |
| 212 | st->codec->height = AV_RL16(§or[0x2A]); |
| 213 | } |
| 214 | |
| 215 | /* if this is the first sector of the frame, allocate a pkt */ |
| 216 | pkt = &str->channels[channel].tmp_pkt; |
| 217 | |
| 218 | if(pkt->size != sector_count*VIDEO_DATA_CHUNK_SIZE){ |
| 219 | if(pkt->data) |
| 220 | av_log(s, AV_LOG_ERROR, "missmatching sector_count\n"); |
| 221 | av_free_packet(pkt); |
| 222 | if (av_new_packet(pkt, sector_count*VIDEO_DATA_CHUNK_SIZE)) |
| 223 | return AVERROR(EIO); |
| 224 | memset(pkt->data, 0, sector_count*VIDEO_DATA_CHUNK_SIZE); |
| 225 | |
| 226 | pkt->pos= avio_tell(pb) - RAW_CD_SECTOR_SIZE; |
| 227 | pkt->stream_index = |
| 228 | str->channels[channel].video_stream_index; |
| 229 | } |
| 230 | |
| 231 | memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE, |
| 232 | sector + VIDEO_DATA_HEADER_SIZE, |
| 233 | VIDEO_DATA_CHUNK_SIZE); |
| 234 | |
| 235 | if (current_sector == sector_count-1) { |
| 236 | pkt->size= frame_size; |
| 237 | *ret_pkt = *pkt; |
| 238 | pkt->data= NULL; |
| 239 | pkt->size= -1; |
| 240 | pkt->buf = NULL; |
| 241 | #if FF_API_DESTRUCT_PACKET |
| 242 | FF_DISABLE_DEPRECATION_WARNINGS |
| 243 | pkt->destruct = NULL; |
| 244 | FF_ENABLE_DEPRECATION_WARNINGS |
| 245 | #endif |
| 246 | return 0; |
| 247 | } |
| 248 | |
| 249 | } |
| 250 | break; |
| 251 | |
| 252 | case CDXA_TYPE_AUDIO: |
| 253 | if(str->channels[channel].audio_stream_index < 0){ |
| 254 | int fmt = sector[0x13]; |
| 255 | /* allocate a new AVStream */ |
| 256 | st = avformat_new_stream(s, NULL); |
| 257 | if (!st) |
| 258 | return AVERROR(ENOMEM); |
| 259 | |
| 260 | str->channels[channel].audio_stream_index = st->index; |
| 261 | |
| 262 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| 263 | st->codec->codec_id = AV_CODEC_ID_ADPCM_XA; |
| 264 | st->codec->codec_tag = 0; /* no fourcc */ |
| 265 | if (fmt & 1) { |
| 266 | st->codec->channels = 2; |
| 267 | st->codec->channel_layout = AV_CH_LAYOUT_STEREO; |
| 268 | } else { |
| 269 | st->codec->channels = 1; |
| 270 | st->codec->channel_layout = AV_CH_LAYOUT_MONO; |
| 271 | } |
| 272 | st->codec->sample_rate = (fmt&4)?18900:37800; |
| 273 | // st->codec->bit_rate = 0; //FIXME; |
| 274 | st->codec->block_align = 128; |
| 275 | |
| 276 | avpriv_set_pts_info(st, 64, 18 * 224 / st->codec->channels, |
| 277 | st->codec->sample_rate); |
| 278 | st->start_time = 0; |
| 279 | } |
| 280 | pkt = ret_pkt; |
| 281 | if (av_new_packet(pkt, 2304)) |
| 282 | return AVERROR(EIO); |
| 283 | memcpy(pkt->data,sector+24,2304); |
| 284 | |
| 285 | pkt->stream_index = |
| 286 | str->channels[channel].audio_stream_index; |
| 287 | pkt->duration = 1; |
| 288 | return 0; |
| 289 | default: |
| 290 | av_log(s, AV_LOG_WARNING, "Unknown sector type %02X\n", sector[0x12]); |
| 291 | /* drop the sector and move on */ |
| 292 | break; |
| 293 | } |
| 294 | |
| 295 | if (avio_feof(pb)) |
| 296 | return AVERROR(EIO); |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | static int str_read_close(AVFormatContext *s) |
| 301 | { |
| 302 | StrDemuxContext *str = s->priv_data; |
| 303 | int i; |
| 304 | for(i=0; i<32; i++){ |
| 305 | if(str->channels[i].tmp_pkt.data) |
| 306 | av_free_packet(&str->channels[i].tmp_pkt); |
| 307 | } |
| 308 | |
| 309 | return 0; |
| 310 | } |
| 311 | |
| 312 | AVInputFormat ff_str_demuxer = { |
| 313 | .name = "psxstr", |
| 314 | .long_name = NULL_IF_CONFIG_SMALL("Sony Playstation STR"), |
| 315 | .priv_data_size = sizeof(StrDemuxContext), |
| 316 | .read_probe = str_probe, |
| 317 | .read_header = str_read_header, |
| 318 | .read_packet = str_read_packet, |
| 319 | .read_close = str_read_close, |
| 320 | .flags = AVFMT_NO_BYTE_SEEK, |
| 321 | }; |