summaryrefslogtreecommitdiffstats
path: root/libavformat/psxstr.c
blob: e662ed788dcd80638050655b251798e59f63372f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
/*
 * Sony Playstation (PSX) STR File Demuxer
 * Copyright (c) 2003 The ffmpeg Project
 *
 * This file is part of Libav.
 *
 * Libav is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * Libav is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * PSX STR file demuxer
 * by Mike Melanson (melanson@pcisys.net)
 * This module handles streams that have been ripped from Sony Playstation
 * CD games. This demuxer can handle either raw STR files (which are just
 * concatenations of raw compact disc sectors) or STR files with 0x2C-byte
 * RIFF headers, followed by CD sectors.
 */

#include "libavutil/channel_layout.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "internal.h"

#define RIFF_TAG MKTAG('R', 'I', 'F', 'F')
#define CDXA_TAG MKTAG('C', 'D', 'X', 'A')

#define RAW_CD_SECTOR_SIZE      2352
#define RAW_CD_SECTOR_DATA_SIZE 2304
#define VIDEO_DATA_CHUNK_SIZE   0x7E0
#define VIDEO_DATA_HEADER_SIZE  0x38
#define RIFF_HEADER_SIZE        0x2C

#define CDXA_TYPE_MASK     0x0E
#define CDXA_TYPE_DATA     0x08
#define CDXA_TYPE_AUDIO    0x04
#define CDXA_TYPE_VIDEO    0x02

#define STR_MAGIC (0x80010160)

typedef struct StrChannel {
    /* video parameters */
    int video_stream_index;
    AVPacket tmp_pkt;

    /* audio parameters */
    int audio_stream_index;
} StrChannel;

typedef struct StrDemuxContext {

    /* a STR file can contain up to 32 channels of data */
    StrChannel channels[32];
} StrDemuxContext;

static const char sync_header[12] = {0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x00};

static int str_probe(AVProbeData *p)
{
    uint8_t *sector= p->buf;

    if (p->buf_size < RAW_CD_SECTOR_SIZE)
        return 0;

    if ((AV_RL32(&p->buf[0]) == RIFF_TAG) &&
        (AV_RL32(&p->buf[8]) == CDXA_TAG)) {

        /* RIFF header seen; skip 0x2C bytes */
        sector += RIFF_HEADER_SIZE;
    }

    /* look for CD sync header (00, 0xFF x 10, 00) */
    if (memcmp(sector,sync_header,sizeof(sync_header)))
        return 0;

    if(sector[0x11] >= 32)
        return 0;
    if(   (sector[0x12] & CDXA_TYPE_MASK) != CDXA_TYPE_VIDEO
       && (sector[0x12] & CDXA_TYPE_MASK) != CDXA_TYPE_AUDIO
       && (sector[0x12] & CDXA_TYPE_MASK) != CDXA_TYPE_DATA)
        return 0;

    /* MPEG files (like those ripped from VCDs) can also look like this;
     * only return half certainty */
    return AVPROBE_SCORE_EXTENSION;
}

static int str_read_header(AVFormatContext *s)
{
    AVIOContext *pb = s->pb;
    StrDemuxContext *str = s->priv_data;
    unsigned char sector[RAW_CD_SECTOR_SIZE];
    int start;
    int i;

    /* skip over any RIFF header */
    if (avio_read(pb, sector, RIFF_HEADER_SIZE) != RIFF_HEADER_SIZE)
        return AVERROR(EIO);
    if (AV_RL32(&sector[0]) == RIFF_TAG)
        start = RIFF_HEADER_SIZE;
    else
        start = 0;

    avio_seek(pb, start, SEEK_SET);

    for(i=0; i<32; i++){
        str->channels[i].video_stream_index=
        str->channels[i].audio_stream_index= -1;
    }

    s->ctx_flags |= AVFMTCTX_NOHEADER;

    return 0;
}

static int str_read_packet(AVFormatContext *s,
                           AVPacket *ret_pkt)
{
    AVIOContext *pb = s->pb;
    StrDemuxContext *str = s->priv_data;
    unsigned char sector[RAW_CD_SECTOR_SIZE];
    int channel;
    AVPacket *pkt;
    AVStream *st;

    while (1) {

        if (avio_read(pb, sector, RAW_CD_SECTOR_SIZE) != RAW_CD_SECTOR_SIZE)
            return AVERROR(EIO);

        channel = sector[0x11];
        if (channel >= 32)
            return AVERROR_INVALIDDATA;

        switch (sector[0x12] & CDXA_TYPE_MASK) {

        case CDXA_TYPE_DATA:
        case CDXA_TYPE_VIDEO:
            {

                int current_sector = AV_RL16(&sector[0x1C]);
                int sector_count   = AV_RL16(&sector[0x1E]);
                int frame_size = AV_RL32(&sector[0x24]);

                if(!(   frame_size>=0
                     && current_sector < sector_count
                     && sector_count*VIDEO_DATA_CHUNK_SIZE >=frame_size)){
                    av_log(s, AV_LOG_ERROR, "Invalid parameters %d %d %d\n", current_sector, sector_count, frame_size);
                    break;
                }

                if(str->channels[channel].video_stream_index < 0){
                    /* allocate a new AVStream */
                    st = avformat_new_stream(s, NULL);
                    if (!st)
                        return AVERROR(ENOMEM);
                    avpriv_set_pts_info(st, 64, 1, 15);

                    str->channels[channel].video_stream_index = st->index;

                    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
                    st->codec->codec_id   = AV_CODEC_ID_MDEC;
                    st->codec->codec_tag  = 0;  /* no fourcc */
                    st->codec->width      = AV_RL16(&sector[0x28]);
                    st->codec->height     = AV_RL16(&sector[0x2A]);
                }

                /* if this is the first sector of the frame, allocate a pkt */
                pkt = &str->channels[channel].tmp_pkt;

                if(pkt->size != sector_count*VIDEO_DATA_CHUNK_SIZE){
                    if(pkt->data)
                        av_log(s, AV_LOG_ERROR, "missmatching sector_count\n");
                    av_free_packet(pkt);
                    if (av_new_packet(pkt, sector_count*VIDEO_DATA_CHUNK_SIZE))
                        return AVERROR(EIO);

                    pkt->pos= avio_tell(pb) - RAW_CD_SECTOR_SIZE;
                    pkt->stream_index =
                        str->channels[channel].video_stream_index;
                }

                memcpy(pkt->data + current_sector*VIDEO_DATA_CHUNK_SIZE,
                       sector + VIDEO_DATA_HEADER_SIZE,
                       VIDEO_DATA_CHUNK_SIZE);

                if (current_sector == sector_count-1) {
                    pkt->size= frame_size;
                    *ret_pkt = *pkt;
                    pkt->data= NULL;
                    pkt->size= -1;
                    pkt->buf = NULL;
#if FF_API_DESTRUCT_PACKET
FF_DISABLE_DEPRECATION_WARNINGS
                    pkt->destruct = NULL;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
                    return 0;
                }

            }
            break;

        case CDXA_TYPE_AUDIO:
            if(str->channels[channel].audio_stream_index < 0){
                int fmt = sector[0x13];
                /* allocate a new AVStream */
                st = avformat_new_stream(s, NULL);
                if (!st)
                    return AVERROR(ENOMEM);

                str->channels[channel].audio_stream_index = st->index;

                st->codec->codec_type  = AVMEDIA_TYPE_AUDIO;
                st->codec->codec_id    = AV_CODEC_ID_ADPCM_XA;
                st->codec->codec_tag   = 0;  /* no fourcc */
                if (fmt & 1) {
                    st->codec->channels       = 2;
                    st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
                } else {
                    st->codec->channels       = 1;
                    st->codec->channel_layout = AV_CH_LAYOUT_MONO;
                }
                st->codec->sample_rate = (fmt&4)?18900:37800;
            //    st->codec->bit_rate = 0; //FIXME;
                st->codec->block_align = 128;

                avpriv_set_pts_info(st, 64, 18 * 224 / st->codec->channels,
                                    st->codec->sample_rate);
                st->start_time = 0;
            }
            pkt = ret_pkt;
            if (av_new_packet(pkt, 2304))
                return AVERROR(EIO);
            memcpy(pkt->data,sector+24,2304);

            pkt->stream_index =
                str->channels[channel].audio_stream_index;
            pkt->duration = 1;
            return 0;
        default:
            av_log(s, AV_LOG_WARNING, "Unknown sector type %02X\n", sector[0x12]);
            /* drop the sector and move on */
            break;
        }

        if (pb->eof_reached)
            return AVERROR(EIO);
    }
}

static int str_read_close(AVFormatContext *s)
{
    StrDemuxContext *str = s->priv_data;
    int i;
    for(i=0; i<32; i++){
        if(str->channels[i].tmp_pkt.data)
            av_free_packet(&str->channels[i].tmp_pkt);
    }

    return 0;
}

AVInputFormat ff_str_demuxer = {
    .name           = "psxstr",
    .long_name      = NULL_IF_CONFIG_SMALL("Sony Playstation STR"),
    .priv_data_size = sizeof(StrDemuxContext),
    .read_probe     = str_probe,
    .read_header    = str_read_header,
    .read_packet    = str_read_packet,
    .read_close     = str_read_close,
    .flags          = AVFMT_NO_BYTE_SEEK,
};
OpenPOWER on IntegriCloud