summaryrefslogtreecommitdiff
path: root/plugins/vtx/vtx.c
blob: c42715db3c384f15cac8ea0bd3cf6aabb0984b2f (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
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
/*
    DeaDBeeF - ultimate music player for GNU/Linux systems with X11
    Copyright (C) 2009-2011 Alexey Yakovenko <waker@users.sourceforge.net>

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either version 2
    of the License, or (at your option) any later version.
    
    This program 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 General Public License for more details.
    
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
#include <stdlib.h>
#include <string.h>
#include "../../deadbeef.h"
#include "ayemu.h"

#define min(x,y) ((x)<(y)?(x):(y))
#define max(x,y) ((x)>(y)?(x):(y))

//#define trace(...) { fprintf (stderr, __VA_ARGS__); }
#define trace(fmt,...)

static DB_decoder_t plugin;
static DB_functions_t *deadbeef;

static const char * exts[] = { "vtx", NULL };

#define AY_FRAME_SIZE 14

typedef struct {
    DB_fileinfo_t info;
    ayemu_vtx_t *decoder;
    ayemu_ay_t ay;
    char regs[AY_FRAME_SIZE];
    int vtx_pos;
    int left;
    int rate;
    int currentsample;
} vtx_info_t;

static DB_fileinfo_t *
vtx_open (uint32_t hints) {
    DB_fileinfo_t *_info = malloc (sizeof (vtx_info_t));
    memset (_info, 0, sizeof (vtx_info_t));
    return _info;
}

static int
vtx_init (DB_fileinfo_t *_info, DB_playItem_t *it) {
    // prepare to decode the track
    // return -1 on failure
    vtx_info_t *info = (vtx_info_t *)_info;
    
    size_t sz = 0;
    char *buf = NULL;

    DB_FILE *fp = deadbeef->fopen (deadbeef->pl_find_meta (it, ":URI"));
    if (!fp) {
        trace ("vtx: failed to open file %s\n", deadbeef->pl_find_meta (it, ":URI"));
        return -1;
    }

    sz = deadbeef->fgetlength (fp);
    if (sz <= 0) {
        trace ("vtx: bad file size\n");
        return -1;
    }

    buf = malloc (sz);
    if (!buf) {
        trace ("vtx: out of memory\n");
        return -1;
    }
    if (deadbeef->fread (buf, 1, sz, fp) != sz) {
        trace ("vtx: read failed\n");
        free (buf);
        return -1;
    }

    info->decoder = ayemu_vtx_load (buf, sz);
    if (!info->decoder) {
        trace ("vtx: ayemu_vtx_load failed\n");
        free (buf);
        return -1;
    }
    trace ("vtx: data=%p, size=%d\n", info->decoder->regdata, info->decoder->regdata_size);

    free (buf);

    ayemu_init (&info->ay);
    ayemu_set_chip_type (&info->ay, info->decoder->chiptype, NULL);
    ayemu_set_chip_freq (&info->ay, info->decoder->chipFreq);
    ayemu_set_stereo (&info->ay, info->decoder->stereo, NULL);

    int samplerate = deadbeef->conf_get_int ("synth.samplerate", 44100);

    info->left = 0;
    info->vtx_pos = 0;
    _info->plugin = &plugin;
    _info->fmt.bps = deadbeef->conf_get_int ("vtx.bps", 16);;
    if (_info->fmt.bps != 16 && _info->fmt.bps != 8) {
        _info->fmt.bps = 16;
    }
    _info->fmt.channels = 2;
    _info->fmt.samplerate = samplerate;
    _info->fmt.channelmask = _info->fmt.channels == 1 ? DDB_SPEAKER_FRONT_LEFT : (DDB_SPEAKER_FRONT_LEFT | DDB_SPEAKER_FRONT_RIGHT);
    _info->readpos = 0;

    ayemu_set_sound_format (&info->ay, samplerate, _info->fmt.channels, _info->fmt.bps);

    info->rate = _info->fmt.channels * _info->fmt.bps / 8;
    return 0;
}

static void
vtx_free (DB_fileinfo_t *_info) {
    // free everything allocated in _init
    vtx_info_t *info = (vtx_info_t *)_info;
    if (_info) {
        if (info->decoder) {
            ayemu_vtx_free (info->decoder);
            info->decoder = NULL;
        }
        ayemu_reset (&info->ay);
        free (_info);
    }
}

/** Get next 14-bytes frame of AY register data.
 *
 * Return value: 1 on success, 0 on eof
 */
static int
ayemu_vtx_get_next_frame (vtx_info_t *info)
{
    int numframes = info->decoder->regdata_size / AY_FRAME_SIZE;
    if (info->vtx_pos++ >= numframes) {
        return 0;
    }
    int n;
    char *p = info->decoder->regdata + info->vtx_pos;
    for(n = 0 ; n < AY_FRAME_SIZE ; n++, p += numframes) {
        info->regs[n] = *p;
    }
    return 1;
}

static int
vtx_read (DB_fileinfo_t *_info, char *bytes, int size) {
    // try decode `size' bytes
    // return number of decoded bytes
    // return 0 on EOF
    vtx_info_t *info = (vtx_info_t *)_info;
    int initsize = size;
    int donow = 0;

    while (size > 0) {
        if (info->left > 0) {
            donow = (size > info->left) ? info->left : size;
            info->left -= donow;
            bytes = ayemu_gen_sound (&info->ay, (char *)bytes, donow);
            size -= donow;
        }
        else {
            if ((ayemu_vtx_get_next_frame (info) == 0)) {
                break; // eof
            }
            else {
                // number of samples it current frame
                info->left = _info->fmt.samplerate / info->decoder->playerFreq;
                // mul by rate to get number of bytes;
                info->left *= info->rate;
                ayemu_set_regs (&info->ay, info->regs);
                donow = 0;
            }
        }
    }
    info->currentsample += (initsize - size) / 4;
    _info->readpos = (float)info->currentsample / _info->fmt.samplerate;
    return initsize - size;
}

static int
vtx_seek_sample (DB_fileinfo_t *_info, int sample) {
    // seek to specified sample (frame)
    // return 0 on success
    // return -1 on failure
    vtx_info_t *info = (vtx_info_t *)_info;

    // get frame
    int num_frames = info->decoder->regdata_size / AY_FRAME_SIZE;
    int samples_per_frame = _info->fmt.samplerate / info->decoder->playerFreq;

    // start of frame
    info->vtx_pos = sample / samples_per_frame;
    if (info->vtx_pos >= num_frames) {
        return -1; // eof
    }
    // copy register data
    int n;
    char *p = info->decoder->regdata + info->vtx_pos;
    for(n = 0 ; n < AY_FRAME_SIZE ; n++, p += num_frames) {
        info->regs[n] = *p;
    }
    // set number of bytes left in frame
    info->left = _info->fmt.samplerate / info->decoder->playerFreq - (sample % samples_per_frame);
    // mul by rate to get number of bytes
    info->left *= info->rate;
    info->currentsample = sample;
    _info->readpos = (float)info->currentsample / _info->fmt.samplerate;

    return 0;
}

static int
vtx_seek (DB_fileinfo_t *_info, float time) {
    // seek to specified time in seconds
    // return 0 on success
    // return -1 on failure
    return vtx_seek_sample (_info, time * _info->fmt.samplerate);
}

static DB_playItem_t *
vtx_insert (ddb_playlist_t *plt, DB_playItem_t *after, const char *fname) {
    // read information from the track
    // load/process cuesheet if exists
    // insert track into playlist
    // return track pointer on success
    // return NULL on failure

    trace ("vtx_insert %s\n");
    // load header
    DB_FILE *fp = deadbeef->fopen (fname);
    if (!fp) {
        trace ("vtx: failed to open file\n");
        return NULL;
    }
    char buf[0x4000];
    size_t sz;
    sz = deadbeef->fread (buf, 1, sizeof (buf), fp);
    deadbeef->fclose (fp);
    if (sz <= 0) {
        trace ("vtx: failed to read header data from file\n");
        return NULL;
    }
    ayemu_vtx_t *hdr = ayemu_vtx_header (buf, sz);
    if (!hdr) {
        trace ("vtx: failed to read header\n");
        return NULL;
    }
    trace ("vtx: datasize: %d\n", hdr->regdata_size);

    DB_playItem_t *it = deadbeef->pl_item_alloc_init (fname, plugin.plugin.id);
    deadbeef->pl_add_meta (it, ":FILETYPE", "VTX");

    int numframes = hdr->regdata_size / AY_FRAME_SIZE;
//    int totalsamples = numframes * hdr->playerFreq;
    trace ("vtx: numframes=%d, playerFreq=%d\n", numframes, hdr->playerFreq);
    deadbeef->plt_set_item_duration (plt, it, (float)numframes / hdr->playerFreq);

    // add metadata
    deadbeef->pl_add_meta (it, "title", hdr->title);
    deadbeef->pl_add_meta (it, "artist", hdr->author);
    deadbeef->pl_add_meta (it, "album", hdr->from);

    ayemu_vtx_free (hdr);
    after = deadbeef->plt_insert_item (plt, after, it);
    deadbeef->pl_item_unref (it);
    return after;
}

static int
vtx_start (void) {
    // do one-time plugin initialization here
    // e.g. starting threads for background processing, subscribing to events, etc
    // return 0 on success
    // return -1 on failure
    return 0;
}
static int
vtx_stop (void) {
    // undo everything done in _start here
    // return 0 on success
    // return -1 on failure
    return 0;
}

static const char settings_dlg[] =
    "property \"Bits per sample (8 or 16)\" entry vtx.bps 16;\n"
;

// define plugin interface
static DB_decoder_t plugin = {
    DB_PLUGIN_SET_API_VERSION
    .plugin.version_major = 1,
    .plugin.version_minor = 0,
    .plugin.type = DB_PLUGIN_DECODER,
    .plugin.id = "vtx",
    .plugin.name = "VTX player",
    .plugin.descr = "AY8910/12 chip emulator and vtx file player",
    .plugin.copyright = 
        "Copyright (C) 2009-2011 Alexey Yakovenko <waker@users.sourceforge.net>\n"
        "\n"
        "Uses libayemu - AY/YM sound chip emulator and music file loader\n"
        "Copyright (C) 2003-2004 Sashnov Alexander\n"
        "\n"
        "This program is free software; you can redistribute it and/or\n"
        "modify it under the terms of the GNU General Public License\n"
        "as published by the Free Software Foundation; either version 2\n"
        "of the License, or (at your option) any later version.\n"
        "\n"
        "This program is distributed in the hope that it will be useful,\n"
        "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
        "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
        "GNU General Public License for more details.\n"
        "\n"
        "You should have received a copy of the GNU General Public License\n"
        "along with this program; if not, write to the Free Software\n"
        "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.\n"
    ,
    .plugin.website = "http://deadbeef.sf.net",
    .plugin.start = vtx_start,
    .plugin.stop = vtx_stop,
    .plugin.configdialog = settings_dlg,
    .open = vtx_open,
    .init = vtx_init,
    .free = vtx_free,
    .read = vtx_read,
    .seek = vtx_seek,
    .seek_sample = vtx_seek_sample,
    .insert = vtx_insert,
    .exts = exts,
};

DB_plugin_t *
vtx_load (DB_functions_t *api) {
    deadbeef = api;
    return DB_PLUGIN (&plugin);
}