1 /*
2 *
3 * BlueZ - Bluetooth protocol stack for Linux
4 *
5 * Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
6 *
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 *
22 */
23
24 #ifdef HAVE_CONFIG_H
25 #include <config.h>
26 #endif
27
28 #include <math.h>
29 #include "gstsbcutil.h"
30
31 /*
32 * Selects one rate from a list of possible rates
33 * TODO - use a better approach to this (it is selecting the last element)
34 */
gst_sbc_select_rate_from_list(const GValue * value)35 gint gst_sbc_select_rate_from_list(const GValue *value)
36 {
37 guint size = gst_value_list_get_size(value);
38 return g_value_get_int(gst_value_list_get_value(value, size-1));
39 }
40
41 /*
42 * Selects one number of channels option from a range of possible numbers
43 * TODO - use a better approach to this (it is selecting the maximum value)
44 */
gst_sbc_select_channels_from_range(const GValue * value)45 gint gst_sbc_select_channels_from_range(const GValue *value)
46 {
47 return gst_value_get_int_range_max(value);
48 }
49
50 /*
51 * Selects one number of blocks from a list of possible blocks
52 * TODO - use a better approach to this (it is selecting the last element)
53 */
gst_sbc_select_blocks_from_list(const GValue * value)54 gint gst_sbc_select_blocks_from_list(const GValue *value)
55 {
56 guint size = gst_value_list_get_size(value);
57 return g_value_get_int(gst_value_list_get_value(value, size-1));
58 }
59
60 /*
61 * Selects one number of subbands from a list
62 * TODO - use a better approach to this (it is selecting the last element)
63 */
gst_sbc_select_subbands_from_list(const GValue * value)64 gint gst_sbc_select_subbands_from_list(const GValue *value)
65 {
66 guint size = gst_value_list_get_size(value);
67 return g_value_get_int(gst_value_list_get_value(value, size-1));
68 }
69
70 /*
71 * Selects one bitpool option from a range
72 * TODO - use a better approach to this (it is selecting the maximum value)
73 */
gst_sbc_select_bitpool_from_range(const GValue * value)74 gint gst_sbc_select_bitpool_from_range(const GValue *value)
75 {
76 return gst_value_get_int_range_max(value);
77 }
78
79 /*
80 * Selects one allocation mode from the ones on the list
81 * TODO - use a better approach
82 */
gst_sbc_get_allocation_from_list(const GValue * value)83 const gchar *gst_sbc_get_allocation_from_list(const GValue *value)
84 {
85 guint size = gst_value_list_get_size(value);
86 return g_value_get_string(gst_value_list_get_value(value, size-1));
87 }
88
89 /*
90 * Selects one mode from the ones on the list
91 */
gst_sbc_get_mode_from_list(const GValue * list,gint channels)92 const gchar *gst_sbc_get_mode_from_list(const GValue *list, gint channels)
93 {
94 unsigned int i;
95 const GValue *value;
96 const gchar *aux;
97 gboolean joint, stereo, dual, mono;
98 guint size = gst_value_list_get_size(list);
99
100 joint = stereo = dual = mono = FALSE;
101
102 for (i = 0; i < size; i++) {
103 value = gst_value_list_get_value(list, i);
104 aux = g_value_get_string(value);
105 if (strcmp("joint", aux) == 0)
106 joint = TRUE;
107 else if (strcmp("stereo", aux) == 0)
108 stereo = TRUE;
109 else if (strcmp("dual", aux) == 0)
110 dual = TRUE;
111 else if (strcmp("mono", aux) == 0)
112 mono = TRUE;
113 }
114
115 if (channels == 1 && mono)
116 return "mono";
117 else if (channels == 2) {
118 if (joint)
119 return "joint";
120 else if (stereo)
121 return "stereo";
122 else if (dual)
123 return "dual";
124 }
125
126 return NULL;
127 }
128
gst_sbc_parse_rate_from_sbc(gint frequency)129 gint gst_sbc_parse_rate_from_sbc(gint frequency)
130 {
131 switch (frequency) {
132 case SBC_FREQ_16000:
133 return 16000;
134 case SBC_FREQ_32000:
135 return 32000;
136 case SBC_FREQ_44100:
137 return 44100;
138 case SBC_FREQ_48000:
139 return 48000;
140 default:
141 return 0;
142 }
143 }
144
gst_sbc_parse_rate_to_sbc(gint rate)145 gint gst_sbc_parse_rate_to_sbc(gint rate)
146 {
147 switch (rate) {
148 case 16000:
149 return SBC_FREQ_16000;
150 case 32000:
151 return SBC_FREQ_32000;
152 case 44100:
153 return SBC_FREQ_44100;
154 case 48000:
155 return SBC_FREQ_48000;
156 default:
157 return -1;
158 }
159 }
160
gst_sbc_get_channel_number(gint mode)161 gint gst_sbc_get_channel_number(gint mode)
162 {
163 switch (mode) {
164 case SBC_MODE_JOINT_STEREO:
165 case SBC_MODE_STEREO:
166 case SBC_MODE_DUAL_CHANNEL:
167 return 2;
168 case SBC_MODE_MONO:
169 return 1;
170 default:
171 return 0;
172 }
173 }
174
gst_sbc_parse_subbands_from_sbc(gint subbands)175 gint gst_sbc_parse_subbands_from_sbc(gint subbands)
176 {
177 switch (subbands) {
178 case SBC_SB_4:
179 return 4;
180 case SBC_SB_8:
181 return 8;
182 default:
183 return 0;
184 }
185 }
186
gst_sbc_parse_subbands_to_sbc(gint subbands)187 gint gst_sbc_parse_subbands_to_sbc(gint subbands)
188 {
189 switch (subbands) {
190 case 4:
191 return SBC_SB_4;
192 case 8:
193 return SBC_SB_8;
194 default:
195 return -1;
196 }
197 }
198
gst_sbc_parse_blocks_from_sbc(gint blocks)199 gint gst_sbc_parse_blocks_from_sbc(gint blocks)
200 {
201 switch (blocks) {
202 case SBC_BLK_4:
203 return 4;
204 case SBC_BLK_8:
205 return 8;
206 case SBC_BLK_12:
207 return 12;
208 case SBC_BLK_16:
209 return 16;
210 default:
211 return 0;
212 }
213 }
214
gst_sbc_parse_blocks_to_sbc(gint blocks)215 gint gst_sbc_parse_blocks_to_sbc(gint blocks)
216 {
217 switch (blocks) {
218 case 4:
219 return SBC_BLK_4;
220 case 8:
221 return SBC_BLK_8;
222 case 12:
223 return SBC_BLK_12;
224 case 16:
225 return SBC_BLK_16;
226 default:
227 return -1;
228 }
229 }
230
gst_sbc_parse_mode_from_sbc(gint mode)231 const gchar *gst_sbc_parse_mode_from_sbc(gint mode)
232 {
233 switch (mode) {
234 case SBC_MODE_MONO:
235 return "mono";
236 case SBC_MODE_DUAL_CHANNEL:
237 return "dual";
238 case SBC_MODE_STEREO:
239 return "stereo";
240 case SBC_MODE_JOINT_STEREO:
241 case SBC_MODE_AUTO:
242 return "joint";
243 default:
244 return NULL;
245 }
246 }
247
gst_sbc_parse_mode_to_sbc(const gchar * mode)248 gint gst_sbc_parse_mode_to_sbc(const gchar *mode)
249 {
250 if (g_ascii_strcasecmp(mode, "joint") == 0)
251 return SBC_MODE_JOINT_STEREO;
252 else if (g_ascii_strcasecmp(mode, "stereo") == 0)
253 return SBC_MODE_STEREO;
254 else if (g_ascii_strcasecmp(mode, "dual") == 0)
255 return SBC_MODE_DUAL_CHANNEL;
256 else if (g_ascii_strcasecmp(mode, "mono") == 0)
257 return SBC_MODE_MONO;
258 else if (g_ascii_strcasecmp(mode, "auto") == 0)
259 return SBC_MODE_JOINT_STEREO;
260 else
261 return -1;
262 }
263
gst_sbc_parse_allocation_from_sbc(gint alloc)264 const gchar *gst_sbc_parse_allocation_from_sbc(gint alloc)
265 {
266 switch (alloc) {
267 case SBC_AM_LOUDNESS:
268 return "loudness";
269 case SBC_AM_SNR:
270 return "snr";
271 case SBC_AM_AUTO:
272 return "loudness";
273 default:
274 return NULL;
275 }
276 }
277
gst_sbc_parse_allocation_to_sbc(const gchar * allocation)278 gint gst_sbc_parse_allocation_to_sbc(const gchar *allocation)
279 {
280 if (g_ascii_strcasecmp(allocation, "loudness") == 0)
281 return SBC_AM_LOUDNESS;
282 else if (g_ascii_strcasecmp(allocation, "snr") == 0)
283 return SBC_AM_SNR;
284 else
285 return SBC_AM_LOUDNESS;
286 }
287
gst_sbc_parse_caps_from_sbc(sbc_t * sbc)288 GstCaps *gst_sbc_parse_caps_from_sbc(sbc_t *sbc)
289 {
290 GstCaps *caps;
291 const gchar *mode_str;
292 const gchar *allocation_str;
293
294 mode_str = gst_sbc_parse_mode_from_sbc(sbc->mode);
295 allocation_str = gst_sbc_parse_allocation_from_sbc(sbc->allocation);
296 caps = gst_caps_new_simple("audio/x-sbc",
297 "rate", G_TYPE_INT,
298 gst_sbc_parse_rate_from_sbc(sbc->frequency),
299 "channels", G_TYPE_INT,
300 gst_sbc_get_channel_number(sbc->mode),
301 "mode", G_TYPE_STRING, mode_str,
302 "subbands", G_TYPE_INT,
303 gst_sbc_parse_subbands_from_sbc(sbc->subbands),
304 "blocks", G_TYPE_INT,
305 gst_sbc_parse_blocks_from_sbc(sbc->blocks),
306 "allocation", G_TYPE_STRING, allocation_str,
307 "bitpool", G_TYPE_INT, sbc->bitpool,
308 NULL);
309
310 return caps;
311 }
312
313 /*
314 * Given a GstCaps, this will return a fixed GstCaps on sucessfull conversion.
315 * If an error occurs, it will return NULL and error_message will contain the
316 * error message.
317 *
318 * error_message must be passed NULL, if an error occurs, the caller has the
319 * ownership of the error_message, it must be freed after use.
320 */
gst_sbc_util_caps_fixate(GstCaps * caps,gchar ** error_message)321 GstCaps *gst_sbc_util_caps_fixate(GstCaps *caps, gchar **error_message)
322 {
323 GstCaps *result;
324 GstStructure *structure;
325 const GValue *value;
326 gboolean error = FALSE;
327 gint temp, rate, channels, blocks, subbands, bitpool;
328 const gchar *allocation = NULL;
329 const gchar *mode = NULL;
330
331 g_assert(*error_message == NULL);
332
333 structure = gst_caps_get_structure(caps, 0);
334
335 if (!gst_structure_has_field(structure, "rate")) {
336 error = TRUE;
337 *error_message = g_strdup("no rate");
338 goto error;
339 } else {
340 value = gst_structure_get_value(structure, "rate");
341 if (GST_VALUE_HOLDS_LIST(value))
342 temp = gst_sbc_select_rate_from_list(value);
343 else
344 temp = g_value_get_int(value);
345 rate = temp;
346 }
347
348 if (!gst_structure_has_field(structure, "channels")) {
349 error = TRUE;
350 *error_message = g_strdup("no channels");
351 goto error;
352 } else {
353 value = gst_structure_get_value(structure, "channels");
354 if (GST_VALUE_HOLDS_INT_RANGE(value))
355 temp = gst_sbc_select_channels_from_range(value);
356 else
357 temp = g_value_get_int(value);
358 channels = temp;
359 }
360
361 if (!gst_structure_has_field(structure, "blocks")) {
362 error = TRUE;
363 *error_message = g_strdup("no blocks.");
364 goto error;
365 } else {
366 value = gst_structure_get_value(structure, "blocks");
367 if (GST_VALUE_HOLDS_LIST(value))
368 temp = gst_sbc_select_blocks_from_list(value);
369 else
370 temp = g_value_get_int(value);
371 blocks = temp;
372 }
373
374 if (!gst_structure_has_field(structure, "subbands")) {
375 error = TRUE;
376 *error_message = g_strdup("no subbands");
377 goto error;
378 } else {
379 value = gst_structure_get_value(structure, "subbands");
380 if (GST_VALUE_HOLDS_LIST(value))
381 temp = gst_sbc_select_subbands_from_list(value);
382 else
383 temp = g_value_get_int(value);
384 subbands = temp;
385 }
386
387 if (!gst_structure_has_field(structure, "bitpool")) {
388 error = TRUE;
389 *error_message = g_strdup("no bitpool");
390 goto error;
391 } else {
392 value = gst_structure_get_value(structure, "bitpool");
393 if (GST_VALUE_HOLDS_INT_RANGE(value))
394 temp = gst_sbc_select_bitpool_from_range(value);
395 else
396 temp = g_value_get_int(value);
397 bitpool = temp;
398 }
399
400 if (!gst_structure_has_field(structure, "allocation")) {
401 error = TRUE;
402 *error_message = g_strdup("no allocation");
403 goto error;
404 } else {
405 value = gst_structure_get_value(structure, "allocation");
406 if (GST_VALUE_HOLDS_LIST(value))
407 allocation = gst_sbc_get_allocation_from_list(value);
408 else
409 allocation = g_value_get_string(value);
410 }
411
412 if (!gst_structure_has_field(structure, "mode")) {
413 error = TRUE;
414 *error_message = g_strdup("no mode");
415 goto error;
416 } else {
417 value = gst_structure_get_value(structure, "mode");
418 if (GST_VALUE_HOLDS_LIST(value)) {
419 mode = gst_sbc_get_mode_from_list(value, channels);
420 } else
421 mode = g_value_get_string(value);
422 }
423
424 /* perform validation
425 * if channels is 1, we must have channel mode = mono
426 * if channels is 2, we can't have channel mode = mono */
427 if ( (channels == 1 && (strcmp(mode, "mono") != 0) ) ||
428 ( channels == 2 && ( strcmp(mode, "mono") == 0))) {
429 *error_message = g_strdup_printf("Invalid combination of "
430 "channels (%d) and channel mode (%s)",
431 channels, mode);
432 error = TRUE;
433 }
434
435 error:
436 if (error)
437 return NULL;
438
439 result = gst_caps_new_simple("audio/x-sbc",
440 "rate", G_TYPE_INT, rate,
441 "channels", G_TYPE_INT, channels,
442 "mode", G_TYPE_STRING, mode,
443 "blocks", G_TYPE_INT, blocks,
444 "subbands", G_TYPE_INT, subbands,
445 "allocation", G_TYPE_STRING, allocation,
446 "bitpool", G_TYPE_INT, bitpool,
447 NULL);
448
449 return result;
450 }
451
452 /**
453 * Sets the int field_value to the param "field" on the structure.
454 * value is used to do the operation, it must be a uninitialized (zero-filled)
455 * GValue, it will be left unitialized at the end of the function.
456 */
gst_sbc_util_set_structure_int_param(GstStructure * structure,const gchar * field,gint field_value,GValue * value)457 void gst_sbc_util_set_structure_int_param(GstStructure *structure,
458 const gchar *field, gint field_value,
459 GValue *value)
460 {
461 value = g_value_init(value, G_TYPE_INT);
462 g_value_set_int(value, field_value);
463 gst_structure_set_value(structure, field, value);
464 g_value_unset(value);
465 }
466
467 /**
468 * Sets the string field_value to the param "field" on the structure.
469 * value is used to do the operation, it must be a uninitialized (zero-filled)
470 * GValue, it will be left unitialized at the end of the function.
471 */
gst_sbc_util_set_structure_string_param(GstStructure * structure,const gchar * field,const gchar * field_value,GValue * value)472 void gst_sbc_util_set_structure_string_param(GstStructure *structure,
473 const gchar *field, const gchar *field_value,
474 GValue *value)
475 {
476 value = g_value_init(value, G_TYPE_STRING);
477 g_value_set_string(value, field_value);
478 gst_structure_set_value(structure, field, value);
479 g_value_unset(value);
480 }
481
gst_sbc_util_fill_sbc_params(sbc_t * sbc,GstCaps * caps)482 gboolean gst_sbc_util_fill_sbc_params(sbc_t *sbc, GstCaps *caps)
483 {
484 GstStructure *structure;
485 gint rate, channels, subbands, blocks, bitpool;
486 const gchar *mode;
487 const gchar *allocation;
488
489 g_assert(gst_caps_is_fixed(caps));
490
491 structure = gst_caps_get_structure(caps, 0);
492
493 if (!gst_structure_get_int(structure, "rate", &rate))
494 return FALSE;
495 if (!gst_structure_get_int(structure, "channels", &channels))
496 return FALSE;
497 if (!gst_structure_get_int(structure, "subbands", &subbands))
498 return FALSE;
499 if (!gst_structure_get_int(structure, "blocks", &blocks))
500 return FALSE;
501 if (!gst_structure_get_int(structure, "bitpool", &bitpool))
502 return FALSE;
503
504 if (!(mode = gst_structure_get_string(structure, "mode")))
505 return FALSE;
506 if (!(allocation = gst_structure_get_string(structure, "allocation")))
507 return FALSE;
508
509 if (channels == 1 && strcmp(mode, "mono") != 0)
510 return FALSE;
511
512 sbc->frequency = gst_sbc_parse_rate_to_sbc(rate);
513 sbc->blocks = gst_sbc_parse_blocks_to_sbc(blocks);
514 sbc->subbands = gst_sbc_parse_subbands_to_sbc(subbands);
515 sbc->bitpool = bitpool;
516 sbc->mode = gst_sbc_parse_mode_to_sbc(mode);
517 sbc->allocation = gst_sbc_parse_allocation_to_sbc(allocation);
518
519 return TRUE;
520 }
521
522