aboutsummaryrefslogtreecommitdiffstats
path: root/src/input/cdda_input_plugin.c
blob: df570190fca19ac96a6a9fd9530c2408cc376f04 (plain) (blame)
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
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
/*
 * Copyright (C) 2003-2010 The Music Player Daemon Project
 * http://www.musicpd.org
 *
 * 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.
 */

/**
  * CD-Audio handling (requires libcdio_paranoia)
  */

#include "config.h"
#include "input/cdda_input_plugin.h"
#include "input_plugin.h"
#include "refcount.h"
#include "pcm_buffer.h"

#include <stdio.h>
#include <stdint.h>
#include <stddef.h>
#include <string.h>
#include <stdlib.h>
#include <glib.h>
#include <assert.h>

#include <cdio/paranoia.h>
#include <cdio/cd_types.h>

struct input_cdda {
	struct input_stream base;

	cdrom_drive_t *drv;
	CdIo_t *cdio;
	cdrom_paranoia_t *para;

	int endian;

	lsn_t lsn_from, lsn_to;
	int lsn_relofs;

	int trackno;

	char buffer[CDIO_CD_FRAMESIZE_RAW];
	int buffer_lsn;

	struct pcm_buffer conv_buffer;
};

static inline GQuark
cdda_quark(void)
{
	return g_quark_from_static_string("cdda");
}

static void
input_cdda_close(struct input_stream *is)
{
	struct input_cdda *i = (struct input_cdda *)is;

	pcm_buffer_deinit(&i->conv_buffer);

	if (i->para)
		cdio_paranoia_free(i->para);
	if (i->drv)
		cdio_cddap_close_no_free_cdio( i->drv);
	if (i->cdio)
		cdio_destroy( i->cdio );

	input_stream_deinit(&i->base);
	g_free(i);
}

struct cdda_uri {
	char device[64];
	int track;
};

static bool
parse_cdda_uri(struct cdda_uri *dest, const char *src, GError **error_r)
{
	if (!g_str_has_prefix(src, "cdda://"))
		return false;

	src += 7;

	if (*src == 0) {
		/* play the whole CD in the default drive */
		dest->device[0] = 0;
		dest->track = -1;
		return true;
	}

	const char *slash = strrchr(src, '/');
	if (slash == NULL) {
		/* play the whole CD in the specified drive */
		g_strlcpy(dest->device, src, sizeof(dest->device));
		dest->track = -1;
		return true;
	}

	size_t device_length = slash - src;
	if (device_length >= sizeof(dest->device))
		device_length = sizeof(dest->device) - 1;

	memcpy(dest->device, src, device_length);
	dest->device[device_length] = 0;

	const char *track = slash + 1;

	char *endptr;
	dest->track = strtoul(track, &endptr, 10);
	if (*endptr != 0) {
		g_set_error(error_r, cdda_quark(), 0,
			    "Malformed track number");
		return false;
	}

	if (endptr == track)
		/* play the whole CD */
		dest->track = -1;

	return true;
}

static char *
cdda_detect_device(void)
{
	char **devices = cdio_get_devices_with_cap(NULL, CDIO_FS_AUDIO, false);
	if (devices == NULL)
		return NULL;

	char *device = g_strdup(devices[0]);
	cdio_free_device_list(devices);

	return device;
}

static struct input_stream *
input_cdda_open(const char *uri, GError **error_r)
{
	struct input_cdda *i;

	struct cdda_uri parsed_uri;
	if (!parse_cdda_uri(&parsed_uri, uri, error_r))
		return NULL;

	i = g_new(struct input_cdda, 1);
	input_stream_init(&i->base, &input_plugin_cdda, uri);

	/* initialize everything (should be already) */
	i->drv = NULL;
	i->cdio = NULL;
	i->para = NULL;
	i->trackno = parsed_uri.track;
	pcm_buffer_init(&i->conv_buffer);

	/* get list of CD's supporting CD-DA */
	char *device = parsed_uri.device[0] != 0
		? g_strdup(parsed_uri.device)
		: cdda_detect_device();
	if (device == NULL) {
		g_set_error(error_r, cdda_quark(), 0,
			    "Unable find or access a CD-ROM drive with an audio CD in it.");
		input_cdda_close(&i->base);
		return NULL;
	}

	/* Found such a CD-ROM with a CD-DA loaded. Use the first drive in the list. */
	i->cdio = cdio_open(device, DRIVER_UNKNOWN);
	g_free(device);

	i->drv = cdio_cddap_identify_cdio(i->cdio, 1, NULL);

	if ( !i->drv ) {
		g_set_error(error_r, cdda_quark(), 0,
			    "Unable to identify audio CD disc.");
		input_cdda_close(&i->base);
		return NULL;
	}

	cdda_verbose_set(i->drv, CDDA_MESSAGE_FORGETIT, CDDA_MESSAGE_FORGETIT);

	if ( 0 != cdio_cddap_open(i->drv) ) {
		g_set_error(error_r, cdda_quark(), 0, "Unable to open disc.");
		input_cdda_close(&i->base);
		return NULL;
	}

	i->endian = data_bigendianp(i->drv);
	switch (i->endian) {
	case -1:
		g_debug("cdda: drive returns unknown audio data, assuming Little Endian");
		i->endian = 0;
		break;
	case 0:
		g_debug("cdda: drive returns audio data Little Endian.");
		break;
	case 1:
		g_debug("cdda: drive returns audio data Big Endian.");
		break;
	default:
		g_set_error(error_r, cdda_quark(), 0,
			    "Drive returns unknown data type %d", i->endian);
		input_cdda_close(&i->base);
		return NULL;
	}

	i->lsn_relofs = 0;

	if (i->trackno >= 0) {
		i->lsn_from = cdio_get_track_lsn(i->cdio, i->trackno);
		i->lsn_to = cdio_get_track_last_lsn(i->cdio, i->trackno);
	} else {
		i->lsn_from = 0;
		i->lsn_to = cdio_get_disc_last_lsn(i->cdio);
	}

	i->para = cdio_paranoia_init(i->drv);

	/* Set reading mode for full paranoia, but allow skipping sectors. */
	paranoia_modeset(i->para, PARANOIA_MODE_FULL^PARANOIA_MODE_NEVERSKIP);

	/* seek to beginning of the track */
	cdio_paranoia_seek(i->para, i->lsn_from, SEEK_SET);

	i->base.ready = true;
	i->base.seekable = true;
	i->base.size = (i->lsn_to - i->lsn_from + 1) * CDIO_CD_FRAMESIZE_RAW;

	/* hack to make MPD select the "pcm" decoder plugin */
	i->base.mime = g_strdup("audio/x-mpd-cdda-pcm");

	return &i->base;
}

static bool
input_cdda_seek(struct input_stream *is,
		goffset offset, int whence, GError **error_r)
{
	struct input_cdda *cis = (struct input_cdda *)is;

	/* calculate absolute offset */
	switch (whence) {
	case SEEK_SET:
		break;
	case SEEK_CUR:
		offset += cis->base.offset;
		break;
	case SEEK_END:
		offset += cis->base.size;
		break;
	}

	if (offset < 0 || offset > cis->base.size) {
		g_set_error(error_r, cdda_quark(), 0,
			    "Invalid offset to seek %ld (%ld)",
			    (long int)offset, (long int)cis->base.size);
		return false;
	}

	/* simple case */
	if (offset == cis->base.offset)
		return true;

	/* calculate current LSN */
	cis->lsn_relofs = offset / CDIO_CD_FRAMESIZE_RAW;
	cis->base.offset = offset;

	cdio_paranoia_seek(cis->para, cis->lsn_from + cis->lsn_relofs, SEEK_SET);

	return true;
}

static inline size_t
pcm16_to_wave(uint16_t *dst16, const uint16_t *src16, size_t length)
{
	size_t cnt = length >> 1;
	while (cnt > 0) {
		*dst16++ = GUINT16_TO_LE(*src16++);
		cnt--;
	}
	return length;
}

static size_t
input_cdda_read(struct input_stream *is, void *ptr, size_t length,
		GError **error_r)
{
	struct input_cdda *cis = (struct input_cdda *)is;
	size_t nbytes = 0;
	int diff;
	size_t len, maxwrite;
	int16_t *rbuf;
	char *s_err, *s_mess;
	char *wptr = (char *) ptr;

	while (length > 0) {


		/* end of track ? */
		if (cis->lsn_from + cis->lsn_relofs > cis->lsn_to)
			break;

		//current sector was changed ?
		if (cis->lsn_relofs != cis->buffer_lsn) {
			rbuf = cdio_paranoia_read(cis->para, NULL);

			s_err = cdda_errors(cis->drv);
			if (s_err) {
				g_warning("paranoia_read: %s", s_err );
				free(s_err);
			}
			s_mess = cdda_messages(cis->drv);
			if (s_mess) {
				free(s_mess);
			}
			if (!rbuf) {
				g_set_error(error_r, cdda_quark(), 0,
					"paranoia read error. Stopping.");
				return 0;
			}
			//do the swapping if nessesary
			if (cis->endian != 0) {
				uint16_t *conv_buffer = pcm_buffer_get(&cis->conv_buffer, CDIO_CD_FRAMESIZE_RAW );
				/* do endian conversion ! */
				pcm16_to_wave( conv_buffer, (uint16_t*) rbuf, CDIO_CD_FRAMESIZE_RAW);
				rbuf = (int16_t *)conv_buffer;
			}
			//store current buffer
			memcpy(cis->buffer, rbuf, CDIO_CD_FRAMESIZE_RAW);
			cis->buffer_lsn = cis->lsn_relofs;
		} else {
			//use cached sector
			rbuf = (int16_t*) cis->buffer;
		}

		//correct offset
		diff = cis->base.offset - cis->lsn_relofs * CDIO_CD_FRAMESIZE_RAW;

		assert(diff >= 0 && diff < CDIO_CD_FRAMESIZE_RAW);

		maxwrite = CDIO_CD_FRAMESIZE_RAW - diff;  //# of bytes pending in current buffer
		len = (length < maxwrite? length : maxwrite);

		//skip diff bytes from this lsn
		memcpy(wptr, ((char*)rbuf) + diff, len);
		//update pointer
		wptr += len;
		nbytes += len;

		//update offset
		cis->base.offset += len;
		cis->lsn_relofs = cis->base.offset / CDIO_CD_FRAMESIZE_RAW;
		//update length
		length -= len;
	}

	return nbytes;
}

static bool
input_cdda_eof(struct input_stream *is)
{
	struct input_cdda *cis = (struct input_cdda *)is;

	return (cis->lsn_from + cis->lsn_relofs > cis->lsn_to);
}

const struct input_plugin input_plugin_cdda = {
	.open = input_cdda_open,
	.close = input_cdda_close,
	.seek = input_cdda_seek,
	.read = input_cdda_read,
	.eof = input_cdda_eof
};