FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/psxstr.c
Date: 2022-12-05 03:11:11
Exec Total Coverage
Lines: 112 136 82.4%
Functions: 4 4 100.0%
Branches: 49 74 66.2%

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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 6782 static int str_probe(const AVProbeData *p)
72 {
73 6782 const uint8_t *sector= p->buf;
74 6782 const uint8_t *end= sector + p->buf_size;
75 6782 int aud=0, vid=0;
76
77
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6782 if (p->buf_size < RAW_CD_SECTOR_SIZE)
78 3438 return 0;
79
80
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3344 if ((AV_RL32(&p->buf[0]) == RIFF_TAG) &&
81
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6 (AV_RL32(&p->buf[8]) == CDXA_TAG)) {
82
83 /* RIFF header seen; skip 0x2C bytes */
84 6 sector += RIFF_HEADER_SIZE;
85 }
86
87
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3374 while (end - sector >= RAW_CD_SECTOR_SIZE) {
88 /* look for CD sync header (00, 0xFF x 10, 00) */
89
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3365 if (memcmp(sector,sync_header,sizeof(sync_header)))
90 3335 return 0;
91
92
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30 if (sector[0x11] >= 32)
93 return 0;
94
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30 switch (sector[0x12] & CDXA_TYPE_MASK) {
96 30 case CDXA_TYPE_DATA:
97 case CDXA_TYPE_VIDEO: {
98 30 int current_sector = AV_RL16(&sector[0x1C]);
99 30 int sector_count = AV_RL16(&sector[0x1E]);
100 30 int frame_size = AV_RL32(&sector[0x24]);
101
102
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30 if(!( frame_size>=0
103
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30 && current_sector < sector_count
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30 && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
105 return 0;
106 }
107 30 vid++;
108
109 }
110 30 break;
111 case CDXA_TYPE_AUDIO:
112 if(sector[0x13]&0x2A)
113 return 0;
114 aud++;
115 break;
116 default:
117 if(sector[0x12] & CDXA_TYPE_MASK)
118 return 0;
119 }
120 30 sector += RAW_CD_SECTOR_SIZE;
121 }
122 /* MPEG files (like those ripped from VCDs) can also look like this;
123 * only return half certainty */
124
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9 if(vid+aud > 3) return AVPROBE_SCORE_EXTENSION;
125
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6 else if(vid+aud) return 1;
126 else return 0;
127 }
128
129 3 static int str_read_header(AVFormatContext *s)
130 {
131 3 AVIOContext *pb = s->pb;
132 3 StrDemuxContext *str = s->priv_data;
133 unsigned char sector[RAW_CD_SECTOR_SIZE];
134 int start;
135 int i;
136
137 /* skip over any RIFF header */
138
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3 if (avio_read(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE)
139 return AVERROR(EIO);
140
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3 if (AV_RL32(&sector[0]) == RIFF_TAG)
141 2 start = RIFF_HEADER_SIZE;
142 else
143 1 start = 0;
144
145 3 avio_seek(pb, start, SEEK_SET);
146
147
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99 for(i=0; i<32; i++){
148 96 str->channels[i].video_stream_index=
149 96 str->channels[i].audio_stream_index= -1;
150 }
151
152 3 s->ctx_flags |= AVFMTCTX_NOHEADER;
153
154 3 return 0;
155 }
156
157 397 static int str_read_packet(AVFormatContext *s,
158 AVPacket *ret_pkt)
159 {
160 397 AVIOContext *pb = s->pb;
161 397 StrDemuxContext *str = s->priv_data;
162 unsigned char sector[RAW_CD_SECTOR_SIZE];
163 int channel, ret;
164 AVPacket *pkt;
165 AVStream *st;
166
167 while (1) {
168
169
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1490 if (avio_read(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE)
170 5 return AVERROR(EIO);
171
172 1485 channel = sector[0x11];
173
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1485 if (channel >= 32)
174 return AVERROR_INVALIDDATA;
175
176
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1485 switch (sector[0x12] & CDXA_TYPE_MASK) {
177
178 1300 case CDXA_TYPE_DATA:
179 case CDXA_TYPE_VIDEO:
180 {
181
182 1300 int current_sector = AV_RL16(&sector[0x1C]);
183 1300 int sector_count = AV_RL16(&sector[0x1E]);
184 1300 int frame_size = AV_RL32(&sector[0x24]);
185
186
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1300 if(!( frame_size>=0
187
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1300 && current_sector < sector_count
188
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1300 && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
189 av_log(s, AV_LOG_ERROR, "Invalid parameters %d %d %d\n", current_sector, sector_count, frame_size);
190 break;
191 }
192
193
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1300 if(str->channels[channel].video_stream_index < 0){
194 /* allocate a new AVStream */
195 3 st = avformat_new_stream(s, NULL);
196
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3 if (!st)
197 return AVERROR(ENOMEM);
198 3 avpriv_set_pts_info(st, 64, 1, 15);
199
200 3 str->channels[channel].video_stream_index = st->index;
201
202 3 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
203 3 st->codecpar->codec_id = AV_CODEC_ID_MDEC;
204 3 st->codecpar->codec_tag = 0; /* no fourcc */
205 3 st->codecpar->width = AV_RL16(&sector[0x28]);
206 3 st->codecpar->height = AV_RL16(&sector[0x2A]);
207 }
208
209 /* if this is the first sector of the frame, allocate a pkt */
210 1300 pkt = &str->channels[channel].tmp_pkt;
211
212
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1300 if(pkt->size != sector_count*VIDEO_DATA_CHUNK_SIZE){
213
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210 if(pkt->data)
214 av_log(s, AV_LOG_ERROR, "mismatching sector_count\n");
215 210 av_packet_unref(pkt);
216 210 ret = av_new_packet(pkt, sector_count * VIDEO_DATA_CHUNK_SIZE);
217
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210 if (ret < 0)
218 return ret;
219 210 memset(pkt->data, 0, sector_count*VIDEO_DATA_CHUNK_SIZE);
220
221 210 pkt->pos= avio_tell(pb) - RAW_CD_SECTOR_SIZE;
222 210 pkt->stream_index =
223 210 str->channels[channel].video_stream_index;
224 }
225
226 1300 memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE,
227 sector + VIDEO_DATA_HEADER_SIZE,
228 VIDEO_DATA_CHUNK_SIZE);
229
230
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1300 if (current_sector == sector_count-1) {
231 207 pkt->size= frame_size;
232 207 *ret_pkt = *pkt;
233 207 pkt->data= NULL;
234 207 pkt->size= -1;
235 207 pkt->buf = NULL;
236 207 return 0;
237 }
238
239 }
240 1093 break;
241
242 185 case CDXA_TYPE_AUDIO:
243
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185 if(str->channels[channel].audio_stream_index < 0){
244 3 int fmt = sector[0x13];
245 /* allocate a new AVStream */
246 3 st = avformat_new_stream(s, NULL);
247
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3 if (!st)
248 return AVERROR(ENOMEM);
249
250 3 str->channels[channel].audio_stream_index = st->index;
251
252 3 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
253 3 st->codecpar->codec_id = AV_CODEC_ID_ADPCM_XA;
254 3 st->codecpar->codec_tag = 0; /* no fourcc */
255 3 av_channel_layout_default(&st->codecpar->ch_layout, (fmt & 1) + 1);
256
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3 st->codecpar->sample_rate = (fmt&4)?18900:37800;
257 // st->codecpar->bit_rate = 0; //FIXME;
258 3 st->codecpar->block_align = 128;
259
260 3 avpriv_set_pts_info(st, 64, 18 * 224 / st->codecpar->ch_layout.nb_channels,
261 3 st->codecpar->sample_rate);
262 3 st->start_time = 0;
263 }
264 185 pkt = ret_pkt;
265
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185 if ((ret = av_new_packet(pkt, 2304)) < 0)
266 return ret;
267 185 memcpy(pkt->data,sector+24,2304);
268
269 185 pkt->stream_index =
270 185 str->channels[channel].audio_stream_index;
271 185 pkt->duration = 1;
272 185 return 0;
273 default:
274 av_log(s, AV_LOG_WARNING, "Unknown sector type %02X\n", sector[0x12]);
275 /* drop the sector and move on */
276 break;
277 }
278
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1093 if (avio_feof(pb))
280 return AVERROR(EIO);
281 }
282 }
283
284 3 static int str_read_close(AVFormatContext *s)
285 {
286 3 StrDemuxContext *str = s->priv_data;
287 int i;
288
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99 for(i=0; i<32; i++){
289
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96 if(str->channels[i].tmp_pkt.data)
290 3 av_packet_unref(&str->channels[i].tmp_pkt);
291 }
292
293 3 return 0;
294 }
295
296 const AVInputFormat ff_str_demuxer = {
297 .name = "psxstr",
298 .long_name = NULL_IF_CONFIG_SMALL("Sony Playstation STR"),
299 .priv_data_size = sizeof(StrDemuxContext),
300 .read_probe = str_probe,
301 .read_header = str_read_header,
302 .read_packet = str_read_packet,
303 .read_close = str_read_close,
304 .flags = AVFMT_NO_BYTE_SEEK,
305 };
306