2 * Sony Playstation (PSX) STR File Demuxer
3 * Copyright (c) 2003 The ffmpeg Project
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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 char sync_header[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00};
71 static int str_probe(AVProbeData *p)
73 uint8_t *sector= p->buf;
75 if (p->buf_size < RAW_CD_SECTOR_SIZE)
78 if ((AV_RL32(&p->buf[0]) == RIFF_TAG) &&
79 (AV_RL32(&p->buf[8]) == CDXA_TAG)) {
81 /* RIFF header seen; skip 0x2C bytes */
82 sector += RIFF_HEADER_SIZE;
85 /* look for CD sync header (00, 0xFF x 10, 00) */
86 if (memcmp(sector,sync_header,sizeof(sync_header)))
89 if(sector[0x11] >= 32)
91 if( (sector[0x12] & CDXA_TYPE_MASK) != CDXA_TYPE_VIDEO
92 && (sector[0x12] & CDXA_TYPE_MASK) != CDXA_TYPE_AUDIO
93 && (sector[0x12] & CDXA_TYPE_MASK) != CDXA_TYPE_DATA)
96 /* MPEG files (like those ripped from VCDs) can also look like this;
97 * only return half certainty */
98 return AVPROBE_SCORE_EXTENSION;
101 static int str_read_header(AVFormatContext *s)
103 AVIOContext *pb = s->pb;
104 StrDemuxContext *str = s->priv_data;
105 unsigned char sector[RAW_CD_SECTOR_SIZE];
109 /* skip over any RIFF header */
110 if (avio_read(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE)
112 if (AV_RL32(§or[0]) == RIFF_TAG)
113 start = RIFF_HEADER_SIZE;
117 avio_seek(pb, start, SEEK_SET);
120 str->channels[i].video_stream_index=
121 str->channels[i].audio_stream_index= -1;
124 s->ctx_flags |= AVFMTCTX_NOHEADER;
129 static int str_read_packet(AVFormatContext *s,
132 AVIOContext *pb = s->pb;
133 StrDemuxContext *str = s->priv_data;
134 unsigned char sector[RAW_CD_SECTOR_SIZE];
141 if (avio_read(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE)
144 channel = sector[0x11];
146 return AVERROR_INVALIDDATA;
148 switch (sector[0x12] & CDXA_TYPE_MASK) {
151 case CDXA_TYPE_VIDEO:
154 int current_sector = AV_RL16(§or[0x1C]);
155 int sector_count = AV_RL16(§or[0x1E]);
156 int frame_size = AV_RL32(§or[0x24]);
159 && current_sector < sector_count
160 && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
161 av_log(s, AV_LOG_ERROR, "Invalid parameters %d %d %d\n", current_sector, sector_count, frame_size);
165 if(str->channels[channel].video_stream_index < 0){
166 /* allocate a new AVStream */
167 st = avformat_new_stream(s, NULL);
169 return AVERROR(ENOMEM);
170 avpriv_set_pts_info(st, 64, 1, 15);
172 str->channels[channel].video_stream_index = st->index;
174 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
175 st->codec->codec_id = AV_CODEC_ID_MDEC;
176 st->codec->codec_tag = 0; /* no fourcc */
177 st->codec->width = AV_RL16(§or[0x28]);
178 st->codec->height = AV_RL16(§or[0x2A]);
181 /* if this is the first sector of the frame, allocate a pkt */
182 pkt = &str->channels[channel].tmp_pkt;
184 if(pkt->size != sector_count*VIDEO_DATA_CHUNK_SIZE){
186 av_log(s, AV_LOG_ERROR, "missmatching sector_count\n");
188 if (av_new_packet(pkt, sector_count*VIDEO_DATA_CHUNK_SIZE))
191 pkt->pos= avio_tell(pb) - RAW_CD_SECTOR_SIZE;
193 str->channels[channel].video_stream_index;
196 memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE,
197 sector + VIDEO_DATA_HEADER_SIZE,
198 VIDEO_DATA_CHUNK_SIZE);
200 if (current_sector == sector_count-1) {
201 pkt->size= frame_size;
206 #if FF_API_DESTRUCT_PACKET
207 FF_DISABLE_DEPRECATION_WARNINGS
208 pkt->destruct = NULL;
209 FF_ENABLE_DEPRECATION_WARNINGS
217 case CDXA_TYPE_AUDIO:
218 if(str->channels[channel].audio_stream_index < 0){
219 int fmt = sector[0x13];
220 /* allocate a new AVStream */
221 st = avformat_new_stream(s, NULL);
223 return AVERROR(ENOMEM);
225 str->channels[channel].audio_stream_index = st->index;
227 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
228 st->codec->codec_id = AV_CODEC_ID_ADPCM_XA;
229 st->codec->codec_tag = 0; /* no fourcc */
231 st->codec->channels = 2;
232 st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
234 st->codec->channels = 1;
235 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
237 st->codec->sample_rate = (fmt&4)?18900:37800;
238 // st->codec->bit_rate = 0; //FIXME;
239 st->codec->block_align = 128;
241 avpriv_set_pts_info(st, 64, 18 * 224 / st->codec->channels,
242 st->codec->sample_rate);
246 if (av_new_packet(pkt, 2304))
248 memcpy(pkt->data,sector+24,2304);
251 str->channels[channel].audio_stream_index;
255 av_log(s, AV_LOG_WARNING, "Unknown sector type %02X\n", sector[0x12]);
256 /* drop the sector and move on */
265 static int str_read_close(AVFormatContext *s)
267 StrDemuxContext *str = s->priv_data;
270 if(str->channels[i].tmp_pkt.data)
271 av_free_packet(&str->channels[i].tmp_pkt);
277 AVInputFormat ff_str_demuxer = {
279 .long_name = NULL_IF_CONFIG_SMALL("Sony Playstation STR"),
280 .priv_data_size = sizeof(StrDemuxContext),
281 .read_probe = str_probe,
282 .read_header = str_read_header,
283 .read_packet = str_read_packet,
284 .read_close = str_read_close,
285 .flags = AVFMT_NO_BYTE_SEEK,