summaryrefslogtreecommitdiffstats
path: root/audio/gstsbcutil.c
blob: 075e3a4dae7b3b69ced134bf890387ee52e25a2d (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
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
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2004-2008  Marcel Holtmann <marcel@holtmann.org>
 *
 *
 *  This library 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.
 *
 *  This library 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 this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "ipc.h"
#include <math.h>
#include "gstsbcutil.h"

/*
 * Selects one rate from a list of possible rates
 * TODO - use a better approach to this (it is selecting the last element)
 */
gint gst_sbc_select_rate_from_list(const GValue *value)
{
	guint size = gst_value_list_get_size(value);
	return g_value_get_int(gst_value_list_get_value(value, size-1));
}

/*
 * Selects one number of channels option from a range of possible numbers
 * TODO - use a better approach to this (it is selecting the maximum value)
 */
gint gst_sbc_select_channels_from_range(const GValue *value)
{
	return gst_value_get_int_range_max(value);
}

/*
 * Selects one number of blocks from a list of possible blocks
 * TODO - use a better approach to this (it is selecting the last element)
 */
gint gst_sbc_select_blocks_from_list(const GValue *value)
{
	guint size = gst_value_list_get_size(value);
	return g_value_get_int(gst_value_list_get_value(value, size-1));
}

/*
 * Selects one number of subbands from a list
 * TODO - use a better approach to this (it is selecting the last element)
 */
gint gst_sbc_select_subbands_from_list(const GValue *value)
{
	guint size = gst_value_list_get_size(value);
	return g_value_get_int(gst_value_list_get_value(value, size-1));
}

/*
 * Selects one bitpool option from a range
 * TODO - use a better approach to this (it is selecting the maximum value)
 */
gint gst_sbc_select_bitpool_from_range(const GValue *value)
{
	return gst_value_get_int_range_max(value);
}

/*
 * Selects one allocation mode from the ones on the list
 * TODO - use a better approach
 */
const gchar *gst_sbc_get_allocation_from_list(const GValue *value)
{
	guint size = gst_value_list_get_size(value);
	return g_value_get_string(gst_value_list_get_value(value, size-1));
}

/*
 * Selects one mode from the ones on the list
 */
const gchar *gst_sbc_get_mode_from_list(const GValue *list, gint channels)
{
	int i;
	const GValue *value;
	const gchar *aux;
	gboolean joint, stereo, dual, mono;

	joint = stereo = dual = mono = FALSE;
	guint size = gst_value_list_get_size(list);

	for (i = 0; i < size; i++) {
		value = gst_value_list_get_value(list, i);
		aux = g_value_get_string(value);
		if (strcmp("joint", aux) == 0)
			joint = TRUE;
		else if (strcmp("stereo", aux) == 0)
			stereo = TRUE;
		else if (strcmp("dual", aux) == 0)
			dual = TRUE;
		else if (strcmp("mono", aux) == 0)
			mono = TRUE;
	}

	if (channels == 1 && mono)
		return "mono";
	else if (channels == 2) {
		if (joint)
			return "joint";
		else if (stereo)
			return "stereo";
	}

	return NULL;
}

gint gst_sbc_get_allocation_mode_int(const gchar *allocation)
{
	if (g_ascii_strcasecmp(allocation, "loudness") == 0)
		return BT_A2DP_ALLOCATION_LOUDNESS;
	else if (g_ascii_strcasecmp(allocation, "snr") == 0)
		return BT_A2DP_ALLOCATION_SNR;
	else if (g_ascii_strcasecmp(allocation, "auto") == 0)
		return BT_A2DP_ALLOCATION_AUTO;
	else
		return -1;
}

gint gst_sbc_get_mode_int(const gchar *mode)
{
	if (g_ascii_strcasecmp(mode, "joint") == 0)
		return BT_A2DP_CHANNEL_MODE_JOINT_STEREO;
	else if (g_ascii_strcasecmp(mode, "stereo") == 0)
		return BT_A2DP_CHANNEL_MODE_STEREO;
	else if (g_ascii_strcasecmp(mode, "dual") == 0)
		return BT_A2DP_CHANNEL_MODE_DUAL_CHANNEL;
	else if (g_ascii_strcasecmp(mode, "mono") == 0)
		return BT_A2DP_CHANNEL_MODE_MONO;
	else if (g_ascii_strcasecmp(mode, "auto") == 0)
		return BT_A2DP_CHANNEL_MODE_AUTO;
	else
		return -1;
}

/* FIXME add dual when sbc_t supports it */
gboolean gst_sbc_get_mode_int_for_sbc_t(const gchar *mode)
{
	if (g_ascii_strcasecmp(mode, "joint") == 0)
		return TRUE;
	else if (g_ascii_strcasecmp(mode, "stereo") == 0)
		return FALSE;
	else if (g_ascii_strcasecmp(mode, "mono") == 0)
		return FALSE;
	else
		return -1;
}

gint gst_sbc_get_mode_int_from_sbc_t(const sbc_t *sbc)
{
	/* TODO define constants */
	if (sbc->channels == 2 && sbc->joint == 1)
		return 4;
	else if (sbc->channels == 2 && sbc->joint == 0)
		return 3;
	else if (sbc->channels == 1)
		return 1;
	else
		return -1;
}

const gchar *gst_sbc_get_mode_string(gint joint)
{
	switch (joint) {
	case BT_A2DP_CHANNEL_MODE_MONO:
		return "mono";
	case BT_A2DP_CHANNEL_MODE_DUAL_CHANNEL:
		return "dual";
	case BT_A2DP_CHANNEL_MODE_STEREO:
		return "stereo";
	case BT_A2DP_CHANNEL_MODE_JOINT_STEREO:
		return "joint";
	case BT_A2DP_CHANNEL_MODE_AUTO:
		return NULL; /* TODO what should be selected here? */
	default:
		return NULL;
	}
}

const gchar *gst_sbc_get_allocation_string(gint alloc)
{
	switch (alloc) {
	case BT_A2DP_ALLOCATION_LOUDNESS:
		return "loudness";
	case BT_A2DP_ALLOCATION_SNR:
		return "snr";
	case BT_A2DP_ALLOCATION_AUTO:
		return "loudness"; /* TODO what should be selected here? */
	default:
		return NULL;
	}
}

/* channel mode */
#define SBC_CM_MONO             0x00
#define SBC_CM_DUAL_CHANNEL     0x01
#define SBC_CM_STEREO           0x02
#define SBC_CM_JOINT_STEREO     0x03

/* allocation mode */
#define SBC_AM_LOUDNESS         0x00
#define SBC_AM_SNR              0x01

const gchar *gst_sbc_get_mode_string_from_sbc_t(gint channels, gint joint)
{
	if (channels == 2 && joint == 1)
		return "joint";
	else if (channels == 2 && joint == 0)
		return "stereo";
	else if (channels == 1 && joint == 0)
		return "mono";
	else
		return NULL;
}

const gchar *gst_sbc_get_allocation_string_from_sbc_t(gint alloc)
{
	switch (alloc) {
	case SBC_AM_LOUDNESS:
		return "loudness";
	case SBC_AM_SNR:
		return "snr";
	default:
		return NULL;
	}
}

GstCaps* gst_sbc_parse_caps_from_sbc(sbc_t *sbc)
{
	GstCaps *caps;
	const gchar *mode_str;
	const gchar *allocation_str;

	mode_str = gst_sbc_get_mode_string_from_sbc_t(sbc->channels,
							sbc->joint);
	allocation_str = gst_sbc_get_allocation_string_from_sbc_t(
							sbc->allocation);
	caps = gst_caps_new_simple("audio/x-sbc",
				"rate", G_TYPE_INT, sbc->rate,
				"channels", G_TYPE_INT, sbc->channels,
				"mode", G_TYPE_STRING, mode_str,
				"subbands", G_TYPE_INT, sbc->subbands,
				"blocks", G_TYPE_INT, sbc->blocks,
				"allocation", G_TYPE_STRING, allocation_str,
				"bitpool", G_TYPE_INT, sbc->bitpool,
				NULL);

	return caps;
}

GstCaps* gst_sbc_caps_from_sbc(sbc_capabilities_t *sbc, gint channels)
{
	GstCaps *caps;
	const gchar *mode_str;
	const gchar *allocation_str;

	mode_str = gst_sbc_get_mode_string(sbc->channel_mode);
	allocation_str = gst_sbc_get_allocation_string(sbc->allocation_method);

	caps = gst_caps_new_simple("audio/x-sbc",
				"rate", G_TYPE_INT, sbc->frequency,
				"channels", G_TYPE_INT, channels,
				"mode", G_TYPE_STRING, mode_str,
				"subbands", G_TYPE_INT, sbc->subbands,
				"blocks", G_TYPE_INT, sbc->block_length,
				"allocation", G_TYPE_STRING, allocation_str,
				"bitpool", G_TYPE_INT, sbc->max_bitpool,
				NULL);

	return caps;
}

/*
 * Given a GstCaps, this will return a fixed GstCaps on sucessfull conversion.
 * If an error occurs, it will return NULL and error_message will contain the
 * error message.
 *
 * error_message must be passed NULL, if an error occurs, the caller has the
 * ownership of the error_message, it must be freed after use.
 */
GstCaps* gst_sbc_util_caps_fixate(GstCaps *caps, gchar** error_message)
{
	GstCaps *result;
	GstStructure *structure;
	const GValue *value;
	gboolean error = FALSE;
	gint temp, rate, channels, blocks, subbands, bitpool;
	const gchar* allocation = NULL;
	const gchar* mode = NULL;

	g_assert(*error_message == NULL);

	structure = gst_caps_get_structure(caps, 0);

	if (!gst_structure_has_field(structure, "rate")) {
		error = TRUE;
		*error_message = g_strdup("no rate");
		goto error;
	} else {
		value = gst_structure_get_value(structure, "rate");
		if (GST_VALUE_HOLDS_LIST(value))
			temp = gst_sbc_select_rate_from_list(value);
		else
			temp = g_value_get_int(value);
		rate = temp;
	}

	if (!gst_structure_has_field(structure, "channels")) {
		error = TRUE;
		*error_message = g_strdup("no channels");
		goto error;
	} else {
		value = gst_structure_get_value(structure, "channels");
		if (GST_VALUE_HOLDS_INT_RANGE(value))
			temp = gst_sbc_select_channels_from_range(value);
		else
			temp = g_value_get_int(value);
		channels = temp;
	}

	if (!gst_structure_has_field(structure, "blocks")) {
		error = TRUE;
		*error_message = g_strdup("no blocks.");
		goto error;
	} else {
		value = gst_structure_get_value(structure, "blocks");
		if (GST_VALUE_HOLDS_LIST(value))
			temp = gst_sbc_select_blocks_from_list(value);
		else
			temp = g_value_get_int(value);
		blocks = temp;
	}

	if (!gst_structure_has_field(structure, "subbands")) {
		error = TRUE;
		*error_message = g_strdup("no subbands");
		goto error;
	} else {
		value = gst_structure_get_value(structure, "subbands");
		if (GST_VALUE_HOLDS_LIST(value))
			temp = gst_sbc_select_subbands_from_list(value);
		else
			temp = g_value_get_int(value);
		subbands = temp;
	}

	if (!gst_structure_has_field(structure, "bitpool")) {
		error = TRUE;
		*error_message = g_strdup("no bitpool");
		goto error;
	} else {
		value = gst_structure_get_value(structure, "bitpool");
		if (GST_VALUE_HOLDS_INT_RANGE(value))
			temp = gst_sbc_select_bitpool_from_range(value);
		else
			temp = g_value_get_int(value);
		bitpool = temp;
	}

	if (!gst_structure_has_field(structure, "allocation")) {
		error = TRUE;
		*error_message = g_strdup("no allocation");
		goto error;
	} else {
		value = gst_structure_get_value(structure, "allocation");
		if (GST_VALUE_HOLDS_LIST(value))
			allocation = gst_sbc_get_allocation_from_list(value);
		else
			allocation = g_value_get_string(value);
	}

	if (!gst_structure_has_field(structure, "mode")) {
		error = TRUE;
		*error_message = g_strdup("no mode");
		goto error;
	} else {
		value = gst_structure_get_value(structure, "mode");
		if (GST_VALUE_HOLDS_LIST(value)) {
			mode = gst_sbc_get_mode_from_list(value, channels);
		} else
			mode = g_value_get_string(value);
	}

	/* perform validation 
	 * if channels is 1, we must have channel mode = mono
	 * if channels is 2, we can't have channel mode = mono, dual */
	if ( (channels == 1 && (strcmp(mode, "mono") != 0) ) ||
			( channels == 2 && ( strcmp(mode, "mono") == 0 ||
			strcmp(mode, "dual") == 0 ) )) {
		*error_message = g_strdup_printf("Invalid combination of "
					"channels (%d) and channel mode (%s)",
					channels, mode);
		error = TRUE;
	}

error:
	if (error)
		return NULL;

	result = gst_caps_new_simple("audio/x-sbc",
					"rate", G_TYPE_INT, rate,
					"channels", G_TYPE_INT, channels,
					"mode", G_TYPE_STRING, mode,
					"blocks", G_TYPE_INT, blocks,
					"subbands", G_TYPE_INT, subbands,
					"allocation", G_TYPE_STRING, allocation,
					"bitpool", G_TYPE_INT, bitpool,
					NULL);

	return result;
}

/**
 * Sets the int field_value to the  param "field" on the structure.
 * value is used to do the operation, it must be a uninitialized (zero-filled)
 * GValue, it will be left unitialized at the end of the function.
 */
void gst_sbc_util_set_structure_int_param(GstStructure *structure,
			const gchar* field, gint field_value,
			GValue *value)
{
	value = g_value_init(value, G_TYPE_INT);
	g_value_set_int(value, field_value);
	gst_structure_set_value(structure, field, value);
	g_value_unset(value);
}

/**
 * Sets the string field_value to the  param "field" on the structure.
 * value is used to do the operation, it must be a uninitialized (zero-filled)
 * GValue, it will be left unitialized at the end of the function.
 */
void gst_sbc_util_set_structure_string_param(GstStructure *structure,
			const gchar* field, const gchar* field_value,
			GValue *value)
{
	value = g_value_init(value, G_TYPE_STRING);
	g_value_set_string(value, field_value);
	gst_structure_set_value(structure, field, value);
	g_value_unset(value);
}

gboolean gst_sbc_util_fill_sbc_params(sbc_t *sbc, GstCaps *caps)
{
	GstStructure *structure;
	gint rate, channels, subbands, blocks, bitpool;
	const gchar* mode;
	const gchar* allocation;

	g_assert(gst_caps_is_fixed(caps));

	structure = gst_caps_get_structure(caps, 0);

	if (!gst_structure_get_int(structure, "rate", &rate))
		return FALSE;
	if (!gst_structure_get_int(structure, "channels", &channels))
		return FALSE;
	if (!gst_structure_get_int(structure, "subbands", &subbands))
		return FALSE;
	if (!gst_structure_get_int(structure, "blocks", &blocks))
		return FALSE;
	if (!gst_structure_get_int(structure, "bitpool", &bitpool))
		return FALSE;

	if (!(mode = gst_structure_get_string(structure, "mode")))
		return FALSE;
	if (!(allocation = gst_structure_get_string(structure, "allocation")))
		return FALSE;

	sbc->rate = rate;
	sbc->channels = channels;
	sbc->blocks = blocks;
	sbc->subbands = subbands;
	sbc->bitpool = bitpool;
	sbc->joint = gst_sbc_get_mode_int_for_sbc_t(mode);
	sbc->allocation = gst_sbc_get_allocation_mode_int(allocation);

	return TRUE;
}

gint gst_sbc_util_calc_frame_len(gint subbands, gint channels,
                gint blocks, gint bitpool, gint channel_mode)
{
        gint len;
        gint join;
        len = 4 + (4 * subbands * channels)/8;

        if (channel_mode == BT_A2DP_CHANNEL_MODE_MONO ||
                channel_mode == BT_A2DP_CHANNEL_MODE_DUAL_CHANNEL)
                len += ((blocks * channels * bitpool)+7) / 8;
        else {
                join = channel_mode == BT_A2DP_CHANNEL_MODE_JOINT_STEREO
			? 1 : 0;
                len += ((join * subbands + blocks * bitpool)+7)/8;
        }

        return len;
}

gint gst_sbc_util_calc_bitrate(gint frame_len, gint rate, gint subbands,
                gint blocks)
{
	return (((frame_len * 8 * rate / subbands) / blocks) / 1000);
}

gint64 gst_sbc_util_calc_frame_duration(gint rate, gint blocks, gint subbands)
{
	gint64 res = 1000000;
	return res * blocks * subbands / rate;
}