1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "a2dp_source_demo.c" 39 40 /* 41 * a2dp_source_demo.c 42 */ 43 44 // ***************************************************************************** 45 /* EXAMPLE_START(a2dp_source_demo): A2DP Source - Stream Audio and Control Volume 46 * 47 * @text This A2DP Source example demonstrates how to send an audio data stream 48 * to a remote A2DP Sink device and how to switch between two audio data sources. 49 * In addition, the AVRCP Target is used to answer queries on currently played media, 50 * as well as to handle remote playback control, i.e. play, stop, repeat, etc. If HAVE_BTSTACK_STDIN 51 * is set, press SPACE on the console to show the available AVDTP and AVRCP commands. 52 * 53 * @text To test with a remote device, e.g. a Bluetooth speaker, 54 * set the device_addr_string to the Bluetooth address of your 55 * remote device in the code, and use the UI to connect and start playback. 56 * 57 * @text For more info on BTstack audio, see our blog post 58 * [A2DP Sink and Source on STM32 F4 Discovery Board](http://bluekitchen-gmbh.com/a2dp-sink-and-source-on-stm32-f4-discovery-board/). 59 * 60 */ 61 // ***************************************************************************** 62 63 64 #include <stdint.h> 65 #include <stdio.h> 66 #include <stdlib.h> 67 #include <string.h> 68 69 #include "btstack.h" 70 #include "hxcmod.h" 71 #include "mods/mod.h" 72 73 // logarithmic volume reduction, samples are divided by 2^x 74 // #define VOLUME_REDUCTION 3 75 // #undef HAVE_BTSTACK_STDIN 76 77 //#define AVRCP_BROWSING_ENABLED 78 79 #define NUM_CHANNELS 2 80 #define BYTES_PER_AUDIO_SAMPLE (2*NUM_CHANNELS) 81 #define AUDIO_TIMEOUT_MS 10 82 #define TABLE_SIZE_441HZ 100 83 84 #define SBC_STORAGE_SIZE 1030 85 86 typedef enum { 87 STREAM_SINE = 0, 88 STREAM_MOD, 89 STREAM_PTS_TEST 90 } stream_data_source_t; 91 92 typedef struct { 93 uint16_t a2dp_cid; 94 uint8_t local_seid; 95 uint8_t remote_seid; 96 uint8_t stream_opened; 97 uint16_t avrcp_cid; 98 99 uint32_t time_audio_data_sent; // ms 100 uint32_t acc_num_missed_samples; 101 uint32_t samples_ready; 102 btstack_timer_source_t audio_timer; 103 uint8_t streaming; 104 int max_media_payload_size; 105 106 uint8_t sbc_storage[SBC_STORAGE_SIZE]; 107 uint16_t sbc_storage_count; 108 uint8_t sbc_ready_to_send; 109 110 uint16_t volume; 111 } a2dp_media_sending_context_t; 112 113 static uint8_t media_sbc_codec_capabilities[] = { 114 (AVDTP_SBC_44100 << 4) | AVDTP_SBC_STEREO, 115 0xFF,//(AVDTP_SBC_BLOCK_LENGTH_16 << 4) | (AVDTP_SBC_SUBBANDS_8 << 2) | AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS, 116 2, 53 117 }; 118 119 // input signal: pre-computed int16 sine wave, 44100 Hz at 441 Hz 120 static const int16_t sine_int16_44100[] = { 121 0, 2057, 4107, 6140, 8149, 10126, 12062, 13952, 15786, 17557, 122 19260, 20886, 22431, 23886, 25247, 26509, 27666, 28714, 29648, 30466, 123 31163, 31738, 32187, 32509, 32702, 32767, 32702, 32509, 32187, 31738, 124 31163, 30466, 29648, 28714, 27666, 26509, 25247, 23886, 22431, 20886, 125 19260, 17557, 15786, 13952, 12062, 10126, 8149, 6140, 4107, 2057, 126 0, -2057, -4107, -6140, -8149, -10126, -12062, -13952, -15786, -17557, 127 -19260, -20886, -22431, -23886, -25247, -26509, -27666, -28714, -29648, -30466, 128 -31163, -31738, -32187, -32509, -32702, -32767, -32702, -32509, -32187, -31738, 129 -31163, -30466, -29648, -28714, -27666, -26509, -25247, -23886, -22431, -20886, 130 -19260, -17557, -15786, -13952, -12062, -10126, -8149, -6140, -4107, -2057, 131 }; 132 133 static const int num_samples_sine_int16_44100 = sizeof(sine_int16_44100) / 2; 134 135 // input signal: pre-computed int16 sine wave, 48000 Hz at 441 Hz 136 static const int16_t sine_int16_48000[] = { 137 0, 1905, 3804, 5690, 7557, 9398, 11207, 12978, 14706, 16383, 138 18006, 19567, 21062, 22486, 23834, 25101, 26283, 27376, 28377, 29282, 139 30087, 30791, 31390, 31884, 32269, 32545, 32712, 32767, 32712, 32545, 140 32269, 31884, 31390, 30791, 30087, 29282, 28377, 27376, 26283, 25101, 141 23834, 22486, 21062, 19567, 18006, 16383, 14706, 12978, 11207, 9398, 142 7557, 5690, 3804, 1905, 0, -1905, -3804, -5690, -7557, -9398, 143 -11207, -12978, -14706, -16384, -18006, -19567, -21062, -22486, -23834, -25101, 144 -26283, -27376, -28377, -29282, -30087, -30791, -31390, -31884, -32269, -32545, 145 -32712, -32767, -32712, -32545, -32269, -31884, -31390, -30791, -30087, -29282, 146 -28377, -27376, -26283, -25101, -23834, -22486, -21062, -19567, -18006, -16384, 147 -14706, -12978, -11207, -9398, -7557, -5690, -3804, -1905, }; 148 149 static const int num_samples_sine_int16_48000 = sizeof(sine_int16_48000) / 2; 150 151 typedef struct { 152 int reconfigure; 153 int num_channels; 154 int sampling_frequency; 155 int channel_mode; 156 int block_length; 157 int subbands; 158 int allocation_method; 159 int min_bitpool_value; 160 int max_bitpool_value; 161 int frames_per_buffer; 162 } avdtp_media_codec_configuration_sbc_t; 163 164 static btstack_packet_callback_registration_t hci_event_callback_registration; 165 166 // pts: static const char * device_addr_string = "00:1B:DC:08:0A:A5"; 167 // pts: static const char * device_addr_string = "00:1B:DC:08:E2:72"; 168 // mac 2013: static const char * device_addr_string = "84:38:35:65:d1:15"; 169 // phone 2013: static const char * device_addr_string = "D8:BB:2C:DF:F0:F2"; 170 // Minijambox: 171 static const char * device_addr_string = "00:21:3C:AC:F7:38"; 172 // Philips SHB9100: static const char * device_addr_string = "00:22:37:05:FD:E8"; 173 // RT-B6: static const char * device_addr_string = "00:75:58:FF:C9:7D"; 174 // BT dongle: static const char * device_addr_string = "00:1A:7D:DA:71:0A"; 175 // Sony MDR-ZX330BT static const char * device_addr_string = "00:18:09:28:50:18"; 176 // Panda (BM6) static const char * device_addr_string = "4F:3F:66:52:8B:E0"; 177 // BeatsX: static const char * device_addr_string = "DC:D3:A2:89:57:FB"; 178 // Green mushroom: static const char * device_addr_string = "41:42:2A:ED:D6:F3"; 179 180 static bd_addr_t device_addr; 181 182 static uint8_t sdp_a2dp_source_service_buffer[150]; 183 static uint8_t sdp_avrcp_target_service_buffer[200]; 184 static uint8_t sdp_avrcp_controller_service_buffer[200]; 185 static uint8_t device_id_sdp_service_buffer[100]; 186 187 static avdtp_media_codec_configuration_sbc_t sbc_configuration; 188 static btstack_sbc_encoder_state_t sbc_encoder_state; 189 190 static uint8_t media_sbc_codec_configuration[4]; 191 static a2dp_media_sending_context_t media_tracker; 192 193 static stream_data_source_t data_source; 194 195 static int sine_phase; 196 static int current_sample_rate = 44100; 197 static int new_sample_rate = 44100; 198 199 static int hxcmod_initialized; 200 static modcontext mod_context; 201 static tracker_buffer_state trkbuf; 202 203 /* AVRCP Target context START */ 204 static const uint8_t subunit_info[] = { 205 0,0,0,0, 206 1,1,1,1, 207 2,2,2,2, 208 3,3,3,3, 209 4,4,4,4, 210 5,5,5,5, 211 6,6,6,6, 212 7,7,7,7 213 }; 214 215 static uint32_t company_id = 0x112233; 216 static uint8_t companies_num = 1; 217 static uint8_t companies[] = { 218 0x00, 0x19, 0x58 //BT SIG registered CompanyID 219 }; 220 221 static uint8_t events_num = 6; 222 static uint8_t events[] = { 223 AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED, 224 AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED, 225 AVRCP_NOTIFICATION_EVENT_PLAYER_APPLICATION_SETTING_CHANGED, 226 AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED, 227 AVRCP_NOTIFICATION_EVENT_AVAILABLE_PLAYERS_CHANGED, 228 AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED 229 }; 230 231 typedef struct { 232 uint8_t track_id[8]; 233 uint32_t song_length_ms; 234 avrcp_playback_status_t status; 235 uint32_t song_position_ms; // 0xFFFFFFFF if not supported 236 } avrcp_play_status_info_t; 237 238 // python -c "print('a'*512)" 239 static const char title[] = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"; 240 241 avrcp_track_t tracks[] = { 242 {{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}, 1, "Sine", "Generated", "A2DP Source Demo", "monotone", 12345}, 243 {{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}, 2, "Nao-deceased", "Decease", "A2DP Source Demo", "vivid", 12345}, 244 {{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}, 3, (char *)title, "Decease", "A2DP Source Demo", "vivid", 12345}, 245 }; 246 int current_track_index; 247 avrcp_play_status_info_t play_info; 248 249 /* AVRCP Target context END */ 250 251 /* @section Main Application Setup 252 * 253 * @text The Listing MainConfiguration shows how to setup AD2P Source and AVRCP services. 254 * Besides calling init() method for each service, you'll also need to register several packet handlers: 255 * - hci_packet_handler - handles legacy pairing, here by using fixed '0000' pin code. 256 * - a2dp_source_packet_handler - handles events on stream connection status (established, released), the media codec configuration, and, the commands on stream itself (open, pause, stopp). 257 * - avrcp_packet_handler - receives connect/disconnect event. 258 * - avrcp_controller_packet_handler - receives answers for sent AVRCP commands. 259 * - avrcp_target_packet_handler - receives AVRCP commands, and registered notifications. 260 * - stdin_process - used to trigger AVRCP commands to the A2DP Source device, such are get now playing info, start, stop, volume control. Requires HAVE_BTSTACK_STDIN. 261 * 262 * @text To announce A2DP Source and AVRCP services, you need to create corresponding 263 * SDP records and register them with the SDP service. 264 */ 265 266 /* LISTING_START(MainConfiguration): Setup Audio Source and AVRCP Target services */ 267 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 268 static void a2dp_source_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size); 269 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 270 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 271 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 272 #ifdef HAVE_BTSTACK_STDIN 273 static void stdin_process(char cmd); 274 #endif 275 276 static void a2dp_demo_hexcmod_configure_sample_rate(int sample_rate); 277 278 static int a2dp_source_and_avrcp_services_init(void){ 279 // Request role change on reconnecting headset to always use them in slave mode 280 hci_set_master_slave_policy(0); 281 282 l2cap_init(); 283 // Initialize A2DP Source 284 a2dp_source_init(); 285 a2dp_source_register_packet_handler(&a2dp_source_packet_handler); 286 287 // Create stream endpoint 288 avdtp_stream_endpoint_t * local_stream_endpoint = a2dp_source_create_stream_endpoint(AVDTP_AUDIO, AVDTP_CODEC_SBC, media_sbc_codec_capabilities, sizeof(media_sbc_codec_capabilities), media_sbc_codec_configuration, sizeof(media_sbc_codec_configuration)); 289 if (!local_stream_endpoint){ 290 printf("A2DP Source: not enough memory to create local stream endpoint\n"); 291 return 1; 292 } 293 294 // Store stream enpoint's SEP ID, as it is used by A2DP API to indentify the stream endpoint 295 media_tracker.local_seid = avdtp_local_seid(local_stream_endpoint); 296 avdtp_source_register_delay_reporting_category(media_tracker.local_seid); 297 298 // Initialize AVRCP Service 299 avrcp_init(); 300 avrcp_register_packet_handler(&avrcp_packet_handler); 301 // Initialize AVRCP Target 302 avrcp_target_init(); 303 avrcp_target_register_packet_handler(&avrcp_target_packet_handler); 304 // Initialize AVRCP Controller 305 avrcp_controller_init(); 306 avrcp_controller_register_packet_handler(&avrcp_controller_packet_handler); 307 308 // Initialize SDP, 309 sdp_init(); 310 311 // Create A2DP Source service record and register it with SDP 312 memset(sdp_a2dp_source_service_buffer, 0, sizeof(sdp_a2dp_source_service_buffer)); 313 a2dp_source_create_sdp_record(sdp_a2dp_source_service_buffer, 0x10001, AVDTP_SOURCE_FEATURE_MASK_PLAYER, NULL, NULL); 314 sdp_register_service(sdp_a2dp_source_service_buffer); 315 316 // Create AVRCP target service record and register it with SDP 317 memset(sdp_avrcp_target_service_buffer, 0, sizeof(sdp_avrcp_target_service_buffer)); 318 uint16_t supported_features = AVRCP_FEATURE_MASK_CATEGORY_PLAYER_OR_RECORDER; 319 #ifdef AVRCP_BROWSING_ENABLED 320 supported_features |= AVRCP_FEATURE_MASK_BROWSING; 321 #endif 322 avrcp_target_create_sdp_record(sdp_avrcp_target_service_buffer, 0x10002, supported_features, NULL, NULL); 323 sdp_register_service(sdp_avrcp_target_service_buffer); 324 325 // Register AVRCP Controller 326 memset(sdp_avrcp_controller_service_buffer, 0, sizeof(sdp_avrcp_controller_service_buffer)); 327 uint16_t controller_supported_features = AVRCP_FEATURE_MASK_CATEGORY_PLAYER_OR_RECORDER; 328 avrcp_controller_create_sdp_record(sdp_avrcp_controller_service_buffer, 0x10003, controller_supported_features, NULL, NULL); 329 sdp_register_service(sdp_avrcp_controller_service_buffer); 330 331 // Register Device ID (PnP) service SDP record 332 memset(device_id_sdp_service_buffer, 0, sizeof(device_id_sdp_service_buffer)); 333 device_id_create_sdp_record(device_id_sdp_service_buffer, 0x10004, DEVICE_ID_VENDOR_ID_SOURCE_BLUETOOTH, BLUETOOTH_COMPANY_ID_BLUEKITCHEN_GMBH, 1, 1); 334 sdp_register_service(device_id_sdp_service_buffer); 335 336 // Set local name with a template Bluetooth address, that will be automatically 337 // replaced with a actual address once it is available, i.e. when BTstack boots 338 // up and starts talking to a Bluetooth module. 339 gap_set_local_name("A2DP Source 00:00:00:00:00:00"); 340 gap_discoverable_control(1); 341 gap_set_class_of_device(0x200408); 342 343 // Register for HCI events. 344 hci_event_callback_registration.callback = &hci_packet_handler; 345 hci_add_event_handler(&hci_event_callback_registration); 346 347 a2dp_demo_hexcmod_configure_sample_rate(current_sample_rate); 348 349 #ifdef HAVE_BTSTACK_STDIN 350 // Parse human readable Bluetooth address. 351 sscanf_bd_addr(device_addr_string, device_addr); 352 btstack_stdin_setup(stdin_process); 353 #endif 354 return 0; 355 } 356 /* LISTING_END */ 357 358 static void a2dp_demo_hexcmod_configure_sample_rate(int sample_rate){ 359 if (!hxcmod_initialized){ 360 hxcmod_initialized = hxcmod_init(&mod_context); 361 if (!hxcmod_initialized) { 362 printf("could not initialize hxcmod\n"); 363 return; 364 } 365 } 366 current_sample_rate = sample_rate; 367 media_tracker.sbc_storage_count = 0; 368 media_tracker.samples_ready = 0; 369 hxcmod_unload(&mod_context); 370 hxcmod_setcfg(&mod_context, current_sample_rate, 16, 1, 1, 1); 371 hxcmod_load(&mod_context, (void *) &mod_data, mod_len); 372 } 373 374 static void a2dp_demo_send_media_packet(void){ 375 int num_bytes_in_frame = btstack_sbc_encoder_sbc_buffer_length(); 376 int bytes_in_storage = media_tracker.sbc_storage_count; 377 uint8_t num_frames = bytes_in_storage / num_bytes_in_frame; 378 a2dp_source_stream_send_media_payload(media_tracker.a2dp_cid, media_tracker.local_seid, media_tracker.sbc_storage, bytes_in_storage, num_frames, 0); 379 media_tracker.sbc_storage_count = 0; 380 media_tracker.sbc_ready_to_send = 0; 381 } 382 383 static void produce_sine_audio(int16_t * pcm_buffer, int num_samples_to_write){ 384 int count; 385 for (count = 0; count < num_samples_to_write ; count++){ 386 switch (current_sample_rate){ 387 case 44100: 388 pcm_buffer[count * 2] = sine_int16_44100[sine_phase]; 389 pcm_buffer[count * 2 + 1] = sine_int16_44100[sine_phase]; 390 sine_phase++; 391 if (sine_phase >= num_samples_sine_int16_44100){ 392 sine_phase -= num_samples_sine_int16_44100; 393 } 394 break; 395 case 48000: 396 pcm_buffer[count * 2] = sine_int16_48000[sine_phase]; 397 pcm_buffer[count * 2 + 1] = sine_int16_48000[sine_phase]; 398 sine_phase++; 399 if (sine_phase >= num_samples_sine_int16_48000){ 400 sine_phase -= num_samples_sine_int16_48000; 401 } 402 break; 403 default: 404 break; 405 } 406 } 407 } 408 409 static void produce_mod_audio(int16_t * pcm_buffer, int num_samples_to_write){ 410 hxcmod_fillbuffer(&mod_context, (unsigned short *) &pcm_buffer[0], num_samples_to_write, &trkbuf); 411 } 412 413 static void produce_audio(int16_t * pcm_buffer, int num_samples){ 414 switch (data_source){ 415 case STREAM_SINE: 416 produce_sine_audio(pcm_buffer, num_samples); 417 break; 418 case STREAM_MOD: 419 produce_mod_audio(pcm_buffer, num_samples); 420 break; 421 default: 422 break; 423 } 424 #ifdef VOLUME_REDUCTION 425 int i; 426 for (i=0;i<num_samples*2;i++){ 427 if (pcm_buffer[i] > 0){ 428 pcm_buffer[i] = pcm_buffer[i] >> VOLUME_REDUCTION; 429 } else { 430 pcm_buffer[i] = -((-pcm_buffer[i]) >> VOLUME_REDUCTION); 431 } 432 } 433 #endif 434 } 435 436 static int a2dp_demo_fill_sbc_audio_buffer(a2dp_media_sending_context_t * context){ 437 // perform sbc encoding 438 int total_num_bytes_read = 0; 439 unsigned int num_audio_samples_per_sbc_buffer = btstack_sbc_encoder_num_audio_frames(); 440 while (context->samples_ready >= num_audio_samples_per_sbc_buffer 441 && (context->max_media_payload_size - context->sbc_storage_count) >= btstack_sbc_encoder_sbc_buffer_length()){ 442 443 int16_t pcm_frame[256*NUM_CHANNELS]; 444 445 produce_audio(pcm_frame, num_audio_samples_per_sbc_buffer); 446 btstack_sbc_encoder_process_data(pcm_frame); 447 448 uint16_t sbc_frame_size = btstack_sbc_encoder_sbc_buffer_length(); 449 uint8_t * sbc_frame = btstack_sbc_encoder_sbc_buffer(); 450 451 total_num_bytes_read += num_audio_samples_per_sbc_buffer; 452 memcpy(&context->sbc_storage[context->sbc_storage_count], sbc_frame, sbc_frame_size); 453 context->sbc_storage_count += sbc_frame_size; 454 context->samples_ready -= num_audio_samples_per_sbc_buffer; 455 } 456 return total_num_bytes_read; 457 } 458 459 static void a2dp_demo_audio_timeout_handler(btstack_timer_source_t * timer){ 460 a2dp_media_sending_context_t * context = (a2dp_media_sending_context_t *) btstack_run_loop_get_timer_context(timer); 461 btstack_run_loop_set_timer(&context->audio_timer, AUDIO_TIMEOUT_MS); 462 btstack_run_loop_add_timer(&context->audio_timer); 463 uint32_t now = btstack_run_loop_get_time_ms(); 464 465 uint32_t update_period_ms = AUDIO_TIMEOUT_MS; 466 if (context->time_audio_data_sent > 0){ 467 update_period_ms = now - context->time_audio_data_sent; 468 } 469 470 uint32_t num_samples = (update_period_ms * current_sample_rate) / 1000; 471 context->acc_num_missed_samples += (update_period_ms * current_sample_rate) % 1000; 472 473 while (context->acc_num_missed_samples >= 1000){ 474 num_samples++; 475 context->acc_num_missed_samples -= 1000; 476 } 477 context->time_audio_data_sent = now; 478 context->samples_ready += num_samples; 479 480 if (context->sbc_ready_to_send) return; 481 482 a2dp_demo_fill_sbc_audio_buffer(context); 483 484 if ((context->sbc_storage_count + btstack_sbc_encoder_sbc_buffer_length()) > context->max_media_payload_size){ 485 // schedule sending 486 context->sbc_ready_to_send = 1; 487 a2dp_source_stream_endpoint_request_can_send_now(context->a2dp_cid, context->local_seid); 488 } 489 } 490 491 static void a2dp_demo_timer_start(a2dp_media_sending_context_t * context){ 492 context->max_media_payload_size = btstack_min(a2dp_max_media_payload_size(context->a2dp_cid, context->local_seid), SBC_STORAGE_SIZE); 493 context->sbc_storage_count = 0; 494 context->sbc_ready_to_send = 0; 495 context->streaming = 1; 496 btstack_run_loop_remove_timer(&context->audio_timer); 497 btstack_run_loop_set_timer_handler(&context->audio_timer, a2dp_demo_audio_timeout_handler); 498 btstack_run_loop_set_timer_context(&context->audio_timer, context); 499 btstack_run_loop_set_timer(&context->audio_timer, AUDIO_TIMEOUT_MS); 500 btstack_run_loop_add_timer(&context->audio_timer); 501 } 502 503 static void a2dp_demo_timer_stop(a2dp_media_sending_context_t * context){ 504 context->time_audio_data_sent = 0; 505 context->acc_num_missed_samples = 0; 506 context->samples_ready = 0; 507 context->streaming = 1; 508 context->sbc_storage_count = 0; 509 context->sbc_ready_to_send = 0; 510 btstack_run_loop_remove_timer(&context->audio_timer); 511 } 512 513 static void dump_sbc_configuration(avdtp_media_codec_configuration_sbc_t * configuration){ 514 printf("Received media codec configuration:\n"); 515 printf(" - num_channels: %d\n", configuration->num_channels); 516 printf(" - sampling_frequency: %d\n", configuration->sampling_frequency); 517 printf(" - channel_mode: %d\n", configuration->channel_mode); 518 printf(" - block_length: %d\n", configuration->block_length); 519 printf(" - subbands: %d\n", configuration->subbands); 520 printf(" - allocation_method: %d\n", configuration->allocation_method); 521 printf(" - bitpool_value [%d, %d] \n", configuration->min_bitpool_value, configuration->max_bitpool_value); 522 } 523 524 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 525 UNUSED(channel); 526 UNUSED(size); 527 if (packet_type != HCI_EVENT_PACKET) return; 528 529 #ifndef HAVE_BTSTACK_STDIN 530 if (hci_event_packet_get_type(packet) == BTSTACK_EVENT_STATE){ 531 if (btstack_event_state_get_state(packet) != HCI_STATE_WORKING) return; 532 printf("Create A2DP Source connection to addr %s.\n", bd_addr_to_str(device_addr)); 533 uint8_t status = a2dp_source_establish_stream(device_addr, media_tracker.local_seid, &media_tracker.a2dp_cid); 534 if (status != ERROR_CODE_SUCCESS){ 535 printf("Could not perform command, status 0x%2x\n", status); 536 } 537 return; 538 } 539 #endif 540 541 if (hci_event_packet_get_type(packet) == HCI_EVENT_PIN_CODE_REQUEST) { 542 bd_addr_t address; 543 printf("Pin code request - using '0000'\n"); 544 hci_event_pin_code_request_get_bd_addr(packet, address); 545 gap_pin_code_response(address, "0000"); 546 } 547 } 548 549 static void a2dp_source_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 550 UNUSED(channel); 551 UNUSED(size); 552 uint8_t status; 553 uint8_t local_seid; 554 bd_addr_t address; 555 uint16_t cid; 556 557 if (packet_type != HCI_EVENT_PACKET) return; 558 if (hci_event_packet_get_type(packet) != HCI_EVENT_A2DP_META) return; 559 560 switch (hci_event_a2dp_meta_get_subevent_code(packet)){ 561 case A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 562 a2dp_subevent_signaling_connection_established_get_bd_addr(packet, address); 563 cid = a2dp_subevent_signaling_connection_established_get_a2dp_cid(packet); 564 status = a2dp_subevent_signaling_connection_established_get_status(packet); 565 566 if (status != ERROR_CODE_SUCCESS){ 567 printf("A2DP Source: Connection failed, status 0x%02x, cid 0x%02x, a2dp_cid 0x%02x \n", status, cid, media_tracker.a2dp_cid); 568 media_tracker.a2dp_cid = 0; 569 break; 570 } 571 media_tracker.a2dp_cid = cid; 572 media_tracker.volume = 32; 573 574 printf("A2DP Source: Connected to address %s, a2dp cid 0x%02x, local seid 0x%02x.\n", bd_addr_to_str(address), media_tracker.a2dp_cid, media_tracker.local_seid); 575 break; 576 577 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 578 cid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_avdtp_cid(packet); 579 if (cid != media_tracker.a2dp_cid) return; 580 581 media_tracker.remote_seid = a2dp_subevent_signaling_media_codec_sbc_configuration_get_acp_seid(packet); 582 583 sbc_configuration.reconfigure = a2dp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 584 sbc_configuration.num_channels = a2dp_subevent_signaling_media_codec_sbc_configuration_get_num_channels(packet); 585 sbc_configuration.sampling_frequency = a2dp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 586 sbc_configuration.channel_mode = a2dp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 587 sbc_configuration.block_length = a2dp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 588 sbc_configuration.subbands = a2dp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 589 sbc_configuration.allocation_method = a2dp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 590 sbc_configuration.min_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 591 sbc_configuration.max_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 592 sbc_configuration.frames_per_buffer = sbc_configuration.subbands * sbc_configuration.block_length; 593 printf("A2DP Source: Received SBC codec configuration, sampling frequency %u, a2dp_cid 0x%02x, local seid 0x%02x, remote seid 0x%02x.\n", 594 sbc_configuration.sampling_frequency, cid, 595 a2dp_subevent_signaling_media_codec_sbc_configuration_get_int_seid(packet), 596 a2dp_subevent_signaling_media_codec_sbc_configuration_get_acp_seid(packet)); 597 598 // Adapt Bluetooth spec definition to SBC Encoder expected input 599 sbc_configuration.allocation_method -= 1; 600 sbc_configuration.num_channels = 2; 601 switch (sbc_configuration.channel_mode){ 602 case AVDTP_SBC_JOINT_STEREO: 603 sbc_configuration.channel_mode = 3; 604 break; 605 case AVDTP_SBC_STEREO: 606 sbc_configuration.channel_mode = 2; 607 break; 608 case AVDTP_SBC_DUAL_CHANNEL: 609 sbc_configuration.channel_mode = 1; 610 break; 611 case AVDTP_SBC_MONO: 612 sbc_configuration.channel_mode = 0; 613 sbc_configuration.num_channels = 1; 614 break; 615 default: 616 btstack_assert(false); 617 break; 618 } 619 dump_sbc_configuration(&sbc_configuration); 620 621 btstack_sbc_encoder_init(&sbc_encoder_state, SBC_MODE_STANDARD, 622 sbc_configuration.block_length, sbc_configuration.subbands, 623 sbc_configuration.allocation_method, sbc_configuration.sampling_frequency, 624 sbc_configuration.max_bitpool_value, 625 sbc_configuration.channel_mode); 626 break; 627 } 628 629 case A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 630 printf("A2DP Source: remote supports delay report, remote seid %d\n", 631 avdtp_subevent_signaling_delay_reporting_capability_get_remote_seid(packet)); 632 break; 633 case A2DP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 634 printf("A2DP Source: All capabilities reported, remote seid %d\n", 635 avdtp_subevent_signaling_capabilities_done_get_remote_seid(packet)); 636 break; 637 638 case A2DP_SUBEVENT_SIGNALING_DELAY_REPORT: 639 printf("A2DP Source: Received delay report of %d.%0d ms, local seid %d\n", 640 avdtp_subevent_signaling_delay_report_get_delay_100us(packet)/10, avdtp_subevent_signaling_delay_report_get_delay_100us(packet)%10, 641 avdtp_subevent_signaling_delay_report_get_local_seid(packet)); 642 break; 643 644 case A2DP_SUBEVENT_STREAM_ESTABLISHED: 645 a2dp_subevent_stream_established_get_bd_addr(packet, address); 646 status = a2dp_subevent_stream_established_get_status(packet); 647 if (status){ 648 printf("A2DP Source: Stream failed, status 0x%02x.\n", status); 649 break; 650 } 651 652 local_seid = a2dp_subevent_stream_established_get_local_seid(packet); 653 cid = a2dp_subevent_stream_established_get_a2dp_cid(packet); 654 655 printf("A2DP Source: Stream established a2dp_cid 0x%02x, local_seid 0x%02x, remote_seid 0x%02x\n", cid, local_seid, a2dp_subevent_stream_established_get_remote_seid(packet)); 656 657 a2dp_demo_hexcmod_configure_sample_rate(current_sample_rate); 658 media_tracker.stream_opened = 1; 659 data_source = STREAM_MOD; 660 status = a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 661 break; 662 663 case A2DP_SUBEVENT_STREAM_RECONFIGURED: 664 status = a2dp_subevent_stream_reconfigured_get_status(packet); 665 local_seid = a2dp_subevent_stream_reconfigured_get_local_seid(packet); 666 cid = a2dp_subevent_stream_reconfigured_get_a2dp_cid(packet); 667 668 if (status != ERROR_CODE_SUCCESS){ 669 printf("A2DP Source: Stream reconfiguration failed with status 0x%02x\n", status); 670 break; 671 } 672 673 printf("A2DP Source: Stream reconfigured a2dp_cid 0x%02x, local_seid 0x%02x\n", cid, local_seid); 674 a2dp_demo_hexcmod_configure_sample_rate(new_sample_rate); 675 status = a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 676 break; 677 678 case A2DP_SUBEVENT_STREAM_STARTED: 679 local_seid = a2dp_subevent_stream_started_get_local_seid(packet); 680 cid = a2dp_subevent_stream_started_get_a2dp_cid(packet); 681 682 play_info.status = AVRCP_PLAYBACK_STATUS_PLAYING; 683 if (media_tracker.avrcp_cid){ 684 avrcp_target_set_now_playing_info(media_tracker.avrcp_cid, &tracks[data_source], sizeof(tracks)/sizeof(avrcp_track_t)); 685 avrcp_target_set_playback_status(media_tracker.avrcp_cid, AVRCP_PLAYBACK_STATUS_PLAYING); 686 } 687 a2dp_demo_timer_start(&media_tracker); 688 printf("A2DP Source: Stream started, a2dp_cid 0x%02x, local_seid 0x%02x\n", cid, local_seid); 689 break; 690 691 case A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 692 local_seid = a2dp_subevent_streaming_can_send_media_packet_now_get_local_seid(packet); 693 cid = a2dp_subevent_signaling_media_codec_sbc_configuration_get_a2dp_cid(packet); 694 a2dp_demo_send_media_packet(); 695 break; 696 697 case A2DP_SUBEVENT_STREAM_SUSPENDED: 698 local_seid = a2dp_subevent_stream_suspended_get_local_seid(packet); 699 cid = a2dp_subevent_stream_suspended_get_a2dp_cid(packet); 700 701 play_info.status = AVRCP_PLAYBACK_STATUS_PAUSED; 702 if (media_tracker.avrcp_cid){ 703 avrcp_target_set_playback_status(media_tracker.avrcp_cid, AVRCP_PLAYBACK_STATUS_PAUSED); 704 } 705 printf("A2DP Source: Stream paused, a2dp_cid 0x%02x, local_seid 0x%02x\n", cid, local_seid); 706 707 a2dp_demo_timer_stop(&media_tracker); 708 break; 709 710 case A2DP_SUBEVENT_STREAM_RELEASED: 711 play_info.status = AVRCP_PLAYBACK_STATUS_STOPPED; 712 cid = a2dp_subevent_stream_released_get_a2dp_cid(packet); 713 local_seid = a2dp_subevent_stream_released_get_local_seid(packet); 714 715 printf("A2DP Source: Stream released, a2dp_cid 0x%02x, local_seid 0x%02x\n", cid, local_seid); 716 717 if (cid == media_tracker.a2dp_cid) { 718 media_tracker.stream_opened = 0; 719 printf("A2DP Source: Stream released.\n"); 720 } 721 if (media_tracker.avrcp_cid){ 722 avrcp_target_set_now_playing_info(media_tracker.avrcp_cid, NULL, sizeof(tracks)/sizeof(avrcp_track_t)); 723 avrcp_target_set_playback_status(media_tracker.avrcp_cid, AVRCP_PLAYBACK_STATUS_STOPPED); 724 } 725 a2dp_demo_timer_stop(&media_tracker); 726 break; 727 case A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 728 cid = a2dp_subevent_signaling_connection_released_get_a2dp_cid(packet); 729 if (cid == media_tracker.a2dp_cid) { 730 media_tracker.avrcp_cid = 0; 731 media_tracker.a2dp_cid = 0; 732 printf("A2DP Source: Signaling released.\n\n"); 733 } 734 break; 735 default: 736 break; 737 } 738 } 739 740 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 741 UNUSED(channel); 742 UNUSED(size); 743 bd_addr_t event_addr; 744 uint16_t local_cid; 745 uint8_t status = ERROR_CODE_SUCCESS; 746 747 if (packet_type != HCI_EVENT_PACKET) return; 748 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 749 750 switch (packet[2]){ 751 case AVRCP_SUBEVENT_CONNECTION_ESTABLISHED: 752 local_cid = avrcp_subevent_connection_established_get_avrcp_cid(packet); 753 status = avrcp_subevent_connection_established_get_status(packet); 754 if (status != ERROR_CODE_SUCCESS){ 755 printf("AVRCP: Connection failed, local cid 0x%02x, status 0x%02x\n", local_cid, status); 756 return; 757 } 758 media_tracker.avrcp_cid = local_cid; 759 avrcp_subevent_connection_established_get_bd_addr(packet, event_addr); 760 761 avrcp_target_set_now_playing_info(media_tracker.avrcp_cid, NULL, sizeof(tracks)/sizeof(avrcp_track_t)); 762 avrcp_target_set_unit_info(media_tracker.avrcp_cid, AVRCP_SUBUNIT_TYPE_AUDIO, company_id); 763 avrcp_target_set_subunit_info(media_tracker.avrcp_cid, AVRCP_SUBUNIT_TYPE_AUDIO, (uint8_t *)subunit_info, sizeof(subunit_info)); 764 765 avrcp_controller_get_supported_events(media_tracker.avrcp_cid); 766 767 printf("AVRCP: Channel successfully opened: media_tracker.avrcp_cid 0x%02x\n", media_tracker.avrcp_cid); 768 return; 769 770 case AVRCP_SUBEVENT_CONNECTION_RELEASED: 771 printf("AVRCP Target: Disconnected, avrcp_cid 0x%02x\n", avrcp_subevent_connection_released_get_avrcp_cid(packet)); 772 media_tracker.avrcp_cid = 0; 773 return; 774 default: 775 break; 776 } 777 778 if (status != ERROR_CODE_SUCCESS){ 779 printf("Responding to event 0x%02x failed with status 0x%02x\n", packet[2], status); 780 } 781 } 782 783 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 784 UNUSED(channel); 785 UNUSED(size); 786 uint8_t status = ERROR_CODE_SUCCESS; 787 788 if (packet_type != HCI_EVENT_PACKET) return; 789 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 790 791 switch (packet[2]){ 792 case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED: 793 media_tracker.volume = avrcp_subevent_notification_volume_changed_get_absolute_volume(packet); 794 printf("AVRCP Target: Volume set to %d%% (%d)\n", media_tracker.volume * 127/100, media_tracker.volume); 795 break; 796 case AVRCP_SUBEVENT_EVENT_IDS_QUERY: 797 status = avrcp_target_supported_events(media_tracker.avrcp_cid, events_num, events, sizeof(events)); 798 break; 799 case AVRCP_SUBEVENT_COMPANY_IDS_QUERY: 800 status = avrcp_target_supported_companies(media_tracker.avrcp_cid, companies_num, companies, sizeof(companies)); 801 break; 802 case AVRCP_SUBEVENT_PLAY_STATUS_QUERY: 803 status = avrcp_target_play_status(media_tracker.avrcp_cid, play_info.song_length_ms, play_info.song_position_ms, play_info.status); 804 break; 805 // case AVRCP_SUBEVENT_NOW_PLAYING_INFO_QUERY: 806 // status = avrcp_target_now_playing_info(avrcp_cid); 807 // break; 808 case AVRCP_SUBEVENT_OPERATION:{ 809 avrcp_operation_id_t operation_id = avrcp_subevent_operation_get_operation_id(packet); 810 switch (operation_id){ 811 case AVRCP_OPERATION_ID_PLAY: 812 printf("AVRCP Target: PLAY\n"); 813 status = a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 814 break; 815 case AVRCP_OPERATION_ID_PAUSE: 816 printf("AVRCP Target: PAUSE\n"); 817 status = a2dp_source_pause_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 818 break; 819 case AVRCP_OPERATION_ID_STOP: 820 printf("AVRCP Target: STOP\n"); 821 status = a2dp_source_disconnect(media_tracker.a2dp_cid); 822 break; 823 default: 824 printf("AVRCP Target: operation 0x%2x is not handled\n", operation_id); 825 return; 826 } 827 break; 828 } 829 830 default: 831 break; 832 } 833 834 if (status != ERROR_CODE_SUCCESS){ 835 printf("Responding to event 0x%02x failed with status 0x%02x\n", packet[2], status); 836 } 837 } 838 839 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 840 UNUSED(channel); 841 UNUSED(size); 842 uint8_t status = 0xFF; 843 844 if (packet_type != HCI_EVENT_PACKET) return; 845 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 846 847 status = packet[5]; 848 if (!media_tracker.avrcp_cid) return; 849 850 // ignore INTERIM status 851 if (status == AVRCP_CTYPE_RESPONSE_INTERIM) return; 852 853 switch (packet[2]){ 854 case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED: 855 printf("AVRCP Controller: notification absolute volume changed %d %%\n", avrcp_subevent_notification_volume_changed_get_absolute_volume(packet) * 100 / 127); 856 break; 857 case AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID: 858 printf("Remote supports EVENT_ID 0x%02x\n", avrcp_subevent_get_capability_event_id_get_event_id(packet)); 859 break; 860 case AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID_DONE: 861 printf("automatically enable notifications\n"); 862 avrcp_controller_enable_notification(media_tracker.avrcp_cid, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED); 863 break; 864 default: 865 break; 866 } 867 } 868 869 #ifdef HAVE_BTSTACK_STDIN 870 static void show_usage(void){ 871 bd_addr_t iut_address; 872 gap_local_bd_addr(iut_address); 873 printf("\n--- Bluetooth A2DP Source/AVRCP Demo %s ---\n", bd_addr_to_str(iut_address)); 874 printf("b - A2DP Source create connection to addr %s\n", device_addr_string); 875 printf("B - A2DP Source disconnect\n"); 876 printf("c - AVRCP create connection to addr %s\n", device_addr_string); 877 printf("C - AVRCP disconnect\n"); 878 879 printf("x - start streaming sine\n"); 880 if (hxcmod_initialized){ 881 printf("z - start streaming '%s'\n", mod_name); 882 } 883 printf("p - pause streaming\n"); 884 printf("w - reconfigure stream for 44100 Hz\n"); 885 printf("e - reconfigure stream for 48000 Hz\n"); 886 printf("t - volume up\n"); 887 printf("T - volume down\n"); 888 printf("v - volume up (via set absolute volume)\n"); 889 printf("V - volume down (via set absolute volume)\n"); 890 891 printf("---\n"); 892 } 893 894 static void stdin_process(char cmd){ 895 uint8_t status = ERROR_CODE_SUCCESS; 896 switch (cmd){ 897 case 'b': 898 status = a2dp_source_establish_stream(device_addr, media_tracker.local_seid, &media_tracker.a2dp_cid); 899 printf("%c - Create A2DP Source connection to addr %s, cid 0x%02x.\n", cmd, bd_addr_to_str(device_addr), media_tracker.a2dp_cid); 900 break; 901 case 'B': 902 printf("%c - A2DP Source Disconnect from cid 0x%2x\n", cmd, media_tracker.a2dp_cid); 903 status = a2dp_source_disconnect(media_tracker.a2dp_cid); 904 break; 905 case 'c': 906 printf("%c - Create AVRCP connection to addr %s.\n", cmd, bd_addr_to_str(device_addr)); 907 status = avrcp_connect(device_addr, &media_tracker.avrcp_cid); 908 break; 909 case 'C': 910 printf("%c - AVRCP disconnect\n", cmd); 911 status = avrcp_disconnect(media_tracker.avrcp_cid); 912 break; 913 914 case '\n': 915 case '\r': 916 break; 917 918 case 't': 919 printf(" - volume up\n"); 920 status = avrcp_controller_volume_up(media_tracker.avrcp_cid); 921 break; 922 case 'T': 923 printf(" - volume down\n"); 924 status = avrcp_controller_volume_down(media_tracker.avrcp_cid); 925 break; 926 927 case 'v': 928 if (media_tracker.volume > 117){ 929 media_tracker.volume = 127; 930 } else { 931 media_tracker.volume += 10; 932 } 933 printf(" - volume up (via set absolute volume) %d%% (%d)\n", media_tracker.volume * 127/100, media_tracker.volume); 934 status = avrcp_controller_set_absolute_volume(media_tracker.avrcp_cid, media_tracker.volume); 935 break; 936 case 'V': 937 if (media_tracker.volume < 10){ 938 media_tracker.volume = 0; 939 } else { 940 media_tracker.volume -= 10; 941 } 942 printf(" - volume down (via set absolute volume) %d%% (%d)\n", media_tracker.volume * 127/100, media_tracker.volume); 943 status = avrcp_controller_set_absolute_volume(media_tracker.avrcp_cid, media_tracker.volume); 944 break; 945 946 case 'x': 947 if (media_tracker.avrcp_cid){ 948 avrcp_target_set_now_playing_info(media_tracker.avrcp_cid, &tracks[data_source], sizeof(tracks)/sizeof(avrcp_track_t)); 949 } 950 printf("%c - Play sine.\n", cmd); 951 data_source = STREAM_SINE; 952 if (!media_tracker.stream_opened) break; 953 status = a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 954 break; 955 case 'z': 956 if (media_tracker.avrcp_cid){ 957 avrcp_target_set_now_playing_info(media_tracker.avrcp_cid, &tracks[data_source], sizeof(tracks)/sizeof(avrcp_track_t)); 958 } 959 printf("%c - Play mod.\n", cmd); 960 data_source = STREAM_MOD; 961 if (!media_tracker.stream_opened) break; 962 status = a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 963 break; 964 965 case 'p': 966 if (!media_tracker.stream_opened) break; 967 printf("%c - Pause stream.\n", cmd); 968 status = a2dp_source_pause_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 969 break; 970 971 case 'w': 972 if (!media_tracker.stream_opened) break; 973 if (play_info.status == AVRCP_PLAYBACK_STATUS_PLAYING){ 974 printf("Stream cannot be reconfigured while playing, please pause stream first\n"); 975 break; 976 } 977 new_sample_rate = 44100; 978 if (current_sample_rate == new_sample_rate){ 979 printf("%c - Stream already configured for %d Hz.\n", cmd, new_sample_rate); 980 } else { 981 printf("%c - Reconfigure for %d Hz.\n", cmd, new_sample_rate); 982 status = a2dp_source_reconfigure_stream_sampling_frequency(media_tracker.a2dp_cid, new_sample_rate); 983 } 984 break; 985 986 case 'e': 987 if (!media_tracker.stream_opened) break; 988 if (play_info.status == AVRCP_PLAYBACK_STATUS_PLAYING){ 989 printf("Stream cannot be reconfigured while playing, please pause stream first\n"); 990 break; 991 } 992 new_sample_rate = 48000; 993 if (current_sample_rate == new_sample_rate){ 994 printf("%c - Stream already configured for %d Hz.\n", cmd, new_sample_rate); 995 } else { 996 printf("%c - Reconfigure for %d Hz.\n", cmd, new_sample_rate); 997 status = a2dp_source_reconfigure_stream_sampling_frequency(media_tracker.a2dp_cid, new_sample_rate); 998 } 999 break; 1000 1001 default: 1002 show_usage(); 1003 return; 1004 } 1005 if (status != ERROR_CODE_SUCCESS){ 1006 printf("Could not perform command \'%c\', status 0x%02x\n", cmd, status); 1007 } 1008 } 1009 #endif 1010 1011 1012 int btstack_main(int argc, const char * argv[]); 1013 int btstack_main(int argc, const char * argv[]){ 1014 (void)argc; 1015 (void)argv; 1016 1017 int err = a2dp_source_and_avrcp_services_init(); 1018 if (err) return err; 1019 // turn on! 1020 hci_power_control(HCI_POWER_ON); 1021 return 0; 1022 } 1023 /* EXAMPLE_END */ 1024