2 * Sony Playstation (PSX) STR File Demuxer
3 * Copyright (c) 2003 The FFmpeg Project
5 * This file is part of FFmpeg.
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.
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.
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
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.
32 #include "libavutil/channel_layout.h"
33 #include "libavutil/internal.h"
34 #include "libavutil/intreadwrite.h"
38 #define RIFF_TAG MKTAG('R', 'I', 'F', 'F')
39 #define CDXA_TAG MKTAG('C', 'D', 'X', 'A')
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
47 #define CDXA_TYPE_MASK 0x0E
48 #define CDXA_TYPE_DATA 0x08
49 #define CDXA_TYPE_AUDIO 0x04
50 #define CDXA_TYPE_VIDEO 0x02
52 #define STR_MAGIC (0x80010160)
54 typedef struct StrChannel {
55 /* video parameters */
56 int video_stream_index;
59 /* audio parameters */
60 int audio_stream_index;
63 typedef struct StrDemuxContext {
65 /* a STR file can contain up to 32 channels of data */
66 StrChannel channels[32];
69 static const uint8_t sync_header[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00};
71 static int str_probe(AVProbeData *p)
73 const uint8_t *sector= p->buf;
74 const uint8_t *end= sector + p->buf_size;
77 if (p->buf_size < RAW_CD_SECTOR_SIZE)
80 if ((AV_RL32(&p->buf[0]) == RIFF_TAG) &&
81 (AV_RL32(&p->buf[8]) == CDXA_TAG)) {
83 /* RIFF header seen; skip 0x2C bytes */
84 sector += RIFF_HEADER_SIZE;
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)))
92 if (sector[0x11] >= 32)
95 switch (sector[0x12] & CDXA_TYPE_MASK) {
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]);
103 && current_sector < sector_count
104 && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
108 /*st->codec->width = AV_RL16(§or[0x28]);
109 st->codec->height = AV_RL16(§or[0x2A]);*/
111 // if (current_sector == sector_count-1) {
117 case CDXA_TYPE_AUDIO:
118 if(sector[0x13]&0x2A)
123 if(sector[0x12] & CDXA_TYPE_MASK)
126 sector += RAW_CD_SECTOR_SIZE;
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;
135 static int str_read_header(AVFormatContext *s)
137 AVIOContext *pb = s->pb;
138 StrDemuxContext *str = s->priv_data;
139 unsigned char sector[RAW_CD_SECTOR_SIZE];
143 /* skip over any RIFF header */
144 if (avio_read(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE)
146 if (AV_RL32(§or[0]) == RIFF_TAG)
147 start = RIFF_HEADER_SIZE;
151 avio_seek(pb, start, SEEK_SET);
154 str->channels[i].video_stream_index=
155 str->channels[i].audio_stream_index= -1;
158 s->ctx_flags |= AVFMTCTX_NOHEADER;
163 static int str_read_packet(AVFormatContext *s,
166 AVIOContext *pb = s->pb;
167 StrDemuxContext *str = s->priv_data;
168 unsigned char sector[RAW_CD_SECTOR_SIZE];
175 if (avio_read(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE)
178 channel = sector[0x11];
180 return AVERROR_INVALIDDATA;
182 switch (sector[0x12] & CDXA_TYPE_MASK) {
185 case CDXA_TYPE_VIDEO:
188 int current_sector = AV_RL16(§or[0x1C]);
189 int sector_count = AV_RL16(§or[0x1E]);
190 int frame_size = AV_RL32(§or[0x24]);
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);
199 if(str->channels[channel].video_stream_index < 0){
200 /* allocate a new AVStream */
201 st = avformat_new_stream(s, NULL);
203 return AVERROR(ENOMEM);
204 avpriv_set_pts_info(st, 64, 1, 15);
206 str->channels[channel].video_stream_index = st->index;
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]);
215 /* if this is the first sector of the frame, allocate a pkt */
216 pkt = &str->channels[channel].tmp_pkt;
218 if(pkt->size != sector_count*VIDEO_DATA_CHUNK_SIZE){
220 av_log(s, AV_LOG_ERROR, "missmatching sector_count\n");
221 av_packet_unref(pkt);
222 if (av_new_packet(pkt, sector_count*VIDEO_DATA_CHUNK_SIZE))
224 memset(pkt->data, 0, sector_count*VIDEO_DATA_CHUNK_SIZE);
226 pkt->pos= avio_tell(pb) - RAW_CD_SECTOR_SIZE;
228 str->channels[channel].video_stream_index;
231 memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE,
232 sector + VIDEO_DATA_HEADER_SIZE,
233 VIDEO_DATA_CHUNK_SIZE);
235 if (current_sector == sector_count-1) {
236 pkt->size= frame_size;
247 case CDXA_TYPE_AUDIO:
248 if(str->channels[channel].audio_stream_index < 0){
249 int fmt = sector[0x13];
250 /* allocate a new AVStream */
251 st = avformat_new_stream(s, NULL);
253 return AVERROR(ENOMEM);
255 str->channels[channel].audio_stream_index = st->index;
257 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
258 st->codec->codec_id = AV_CODEC_ID_ADPCM_XA;
259 st->codec->codec_tag = 0; /* no fourcc */
261 st->codec->channels = 2;
262 st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
264 st->codec->channels = 1;
265 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
267 st->codec->sample_rate = (fmt&4)?18900:37800;
268 // st->codec->bit_rate = 0; //FIXME;
269 st->codec->block_align = 128;
271 avpriv_set_pts_info(st, 64, 18 * 224 / st->codec->channels,
272 st->codec->sample_rate);
276 if (av_new_packet(pkt, 2304))
278 memcpy(pkt->data,sector+24,2304);
281 str->channels[channel].audio_stream_index;
285 av_log(s, AV_LOG_WARNING, "Unknown sector type %02X\n", sector[0x12]);
286 /* drop the sector and move on */
295 static int str_read_close(AVFormatContext *s)
297 StrDemuxContext *str = s->priv_data;
300 if(str->channels[i].tmp_pkt.data)
301 av_packet_unref(&str->channels[i].tmp_pkt);
307 AVInputFormat ff_str_demuxer = {
309 .long_name = NULL_IF_CONFIG_SMALL("Sony Playstation STR"),
310 .priv_data_size = sizeof(StrDemuxContext),
311 .read_probe = str_probe,
312 .read_header = str_read_header,
313 .read_packet = str_read_packet,
314 .read_close = str_read_close,
315 .flags = AVFMT_NO_BYTE_SEEK,