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; 153 154 int num_channels; 155 int sampling_frequency; 156 int block_length; 157 int subbands; 158 int min_bitpool_value; 159 int max_bitpool_value; 160 btstack_sbc_channel_mode_t channel_mode; 161 btstack_sbc_allocation_method_t allocation_method; 162 } 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 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 // Prepend SBC Header 379 media_tracker.sbc_storage[0] = num_frames; // (fragmentation << 7) | (starting_packet << 6) | (last_packet << 5) | num_frames; 380 avdtp_source_stream_send_media_payload_rtp(media_tracker.a2dp_cid, media_tracker.local_seid, 0, media_tracker.sbc_storage, bytes_in_storage + 1); 381 382 media_tracker.sbc_storage_count = 0; 383 media_tracker.sbc_ready_to_send = 0; 384 } 385 386 static void produce_sine_audio(int16_t * pcm_buffer, int num_samples_to_write){ 387 int count; 388 for (count = 0; count < num_samples_to_write ; count++){ 389 switch (current_sample_rate){ 390 case 44100: 391 pcm_buffer[count * 2] = sine_int16_44100[sine_phase]; 392 pcm_buffer[count * 2 + 1] = sine_int16_44100[sine_phase]; 393 sine_phase++; 394 if (sine_phase >= num_samples_sine_int16_44100){ 395 sine_phase -= num_samples_sine_int16_44100; 396 } 397 break; 398 case 48000: 399 pcm_buffer[count * 2] = sine_int16_48000[sine_phase]; 400 pcm_buffer[count * 2 + 1] = sine_int16_48000[sine_phase]; 401 sine_phase++; 402 if (sine_phase >= num_samples_sine_int16_48000){ 403 sine_phase -= num_samples_sine_int16_48000; 404 } 405 break; 406 default: 407 break; 408 } 409 } 410 } 411 412 static void produce_mod_audio(int16_t * pcm_buffer, int num_samples_to_write){ 413 hxcmod_fillbuffer(&mod_context, (unsigned short *) &pcm_buffer[0], num_samples_to_write, &trkbuf); 414 } 415 416 static void produce_audio(int16_t * pcm_buffer, int num_samples){ 417 switch (data_source){ 418 case STREAM_SINE: 419 produce_sine_audio(pcm_buffer, num_samples); 420 break; 421 case STREAM_MOD: 422 produce_mod_audio(pcm_buffer, num_samples); 423 break; 424 default: 425 break; 426 } 427 #ifdef VOLUME_REDUCTION 428 int i; 429 for (i=0;i<num_samples*2;i++){ 430 if (pcm_buffer[i] > 0){ 431 pcm_buffer[i] = pcm_buffer[i] >> VOLUME_REDUCTION; 432 } else { 433 pcm_buffer[i] = -((-pcm_buffer[i]) >> VOLUME_REDUCTION); 434 } 435 } 436 #endif 437 } 438 439 static int a2dp_demo_fill_sbc_audio_buffer(a2dp_media_sending_context_t * context){ 440 // perform sbc encoding 441 int total_num_bytes_read = 0; 442 unsigned int num_audio_samples_per_sbc_buffer = btstack_sbc_encoder_num_audio_frames(); 443 while (context->samples_ready >= num_audio_samples_per_sbc_buffer 444 && (context->max_media_payload_size - context->sbc_storage_count) >= btstack_sbc_encoder_sbc_buffer_length()){ 445 446 int16_t pcm_frame[256*NUM_CHANNELS]; 447 448 produce_audio(pcm_frame, num_audio_samples_per_sbc_buffer); 449 btstack_sbc_encoder_process_data(pcm_frame); 450 451 uint16_t sbc_frame_size = btstack_sbc_encoder_sbc_buffer_length(); 452 uint8_t * sbc_frame = btstack_sbc_encoder_sbc_buffer(); 453 454 total_num_bytes_read += num_audio_samples_per_sbc_buffer; 455 // first byte in sbc storage contains sbc media header 456 memcpy(&context->sbc_storage[1 + context->sbc_storage_count], sbc_frame, sbc_frame_size); 457 context->sbc_storage_count += sbc_frame_size; 458 context->samples_ready -= num_audio_samples_per_sbc_buffer; 459 } 460 return total_num_bytes_read; 461 } 462 463 static void a2dp_demo_audio_timeout_handler(btstack_timer_source_t * timer){ 464 a2dp_media_sending_context_t * context = (a2dp_media_sending_context_t *) btstack_run_loop_get_timer_context(timer); 465 btstack_run_loop_set_timer(&context->audio_timer, AUDIO_TIMEOUT_MS); 466 btstack_run_loop_add_timer(&context->audio_timer); 467 uint32_t now = btstack_run_loop_get_time_ms(); 468 469 uint32_t update_period_ms = AUDIO_TIMEOUT_MS; 470 if (context->time_audio_data_sent > 0){ 471 update_period_ms = now - context->time_audio_data_sent; 472 } 473 474 uint32_t num_samples = (update_period_ms * current_sample_rate) / 1000; 475 context->acc_num_missed_samples += (update_period_ms * current_sample_rate) % 1000; 476 477 while (context->acc_num_missed_samples >= 1000){ 478 num_samples++; 479 context->acc_num_missed_samples -= 1000; 480 } 481 context->time_audio_data_sent = now; 482 context->samples_ready += num_samples; 483 484 if (context->sbc_ready_to_send) return; 485 486 a2dp_demo_fill_sbc_audio_buffer(context); 487 488 if ((context->sbc_storage_count + btstack_sbc_encoder_sbc_buffer_length()) > context->max_media_payload_size){ 489 // schedule sending 490 context->sbc_ready_to_send = 1; 491 a2dp_source_stream_endpoint_request_can_send_now(context->a2dp_cid, context->local_seid); 492 } 493 } 494 495 static void a2dp_demo_timer_start(a2dp_media_sending_context_t * context){ 496 context->max_media_payload_size = btstack_min(a2dp_max_media_payload_size(context->a2dp_cid, context->local_seid), SBC_STORAGE_SIZE); 497 context->sbc_storage_count = 0; 498 context->sbc_ready_to_send = 0; 499 context->streaming = 1; 500 btstack_run_loop_remove_timer(&context->audio_timer); 501 btstack_run_loop_set_timer_handler(&context->audio_timer, a2dp_demo_audio_timeout_handler); 502 btstack_run_loop_set_timer_context(&context->audio_timer, context); 503 btstack_run_loop_set_timer(&context->audio_timer, AUDIO_TIMEOUT_MS); 504 btstack_run_loop_add_timer(&context->audio_timer); 505 } 506 507 static void a2dp_demo_timer_stop(a2dp_media_sending_context_t * context){ 508 context->time_audio_data_sent = 0; 509 context->acc_num_missed_samples = 0; 510 context->samples_ready = 0; 511 context->streaming = 1; 512 context->sbc_storage_count = 0; 513 context->sbc_ready_to_send = 0; 514 btstack_run_loop_remove_timer(&context->audio_timer); 515 } 516 517 static void dump_sbc_configuration(media_codec_configuration_sbc_t * configuration){ 518 printf("Received media codec configuration:\n"); 519 printf(" - num_channels: %d\n", configuration->num_channels); 520 printf(" - sampling_frequency: %d\n", configuration->sampling_frequency); 521 printf(" - channel_mode: %d\n", configuration->channel_mode); 522 printf(" - block_length: %d\n", configuration->block_length); 523 printf(" - subbands: %d\n", configuration->subbands); 524 printf(" - allocation_method: %d\n", configuration->allocation_method); 525 printf(" - bitpool_value [%d, %d] \n", configuration->min_bitpool_value, configuration->max_bitpool_value); 526 } 527 528 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 529 UNUSED(channel); 530 UNUSED(size); 531 if (packet_type != HCI_EVENT_PACKET) return; 532 533 #ifndef HAVE_BTSTACK_STDIN 534 if (hci_event_packet_get_type(packet) == BTSTACK_EVENT_STATE){ 535 if (btstack_event_state_get_state(packet) != HCI_STATE_WORKING) return; 536 printf("Create A2DP Source connection to addr %s.\n", bd_addr_to_str(device_addr)); 537 uint8_t status = a2dp_source_establish_stream(device_addr, media_tracker.local_seid, &media_tracker.a2dp_cid); 538 if (status != ERROR_CODE_SUCCESS){ 539 printf("Could not perform command, status 0x%2x\n", status); 540 } 541 return; 542 } 543 #endif 544 545 if (hci_event_packet_get_type(packet) == HCI_EVENT_PIN_CODE_REQUEST) { 546 bd_addr_t address; 547 printf("Pin code request - using '0000'\n"); 548 hci_event_pin_code_request_get_bd_addr(packet, address); 549 gap_pin_code_response(address, "0000"); 550 } 551 } 552 553 static void a2dp_source_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 554 UNUSED(channel); 555 UNUSED(size); 556 uint8_t status; 557 uint8_t local_seid; 558 bd_addr_t address; 559 uint16_t cid; 560 561 uint8_t channel_mode; 562 uint8_t allocation_method; 563 564 if (packet_type != HCI_EVENT_PACKET) return; 565 if (hci_event_packet_get_type(packet) != HCI_EVENT_A2DP_META) return; 566 567 switch (hci_event_a2dp_meta_get_subevent_code(packet)){ 568 case A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED: 569 a2dp_subevent_signaling_connection_established_get_bd_addr(packet, address); 570 cid = a2dp_subevent_signaling_connection_established_get_a2dp_cid(packet); 571 status = a2dp_subevent_signaling_connection_established_get_status(packet); 572 573 if (status != ERROR_CODE_SUCCESS){ 574 printf("A2DP Source: Connection failed, status 0x%02x, cid 0x%02x, a2dp_cid 0x%02x \n", status, cid, media_tracker.a2dp_cid); 575 media_tracker.a2dp_cid = 0; 576 break; 577 } 578 media_tracker.a2dp_cid = cid; 579 media_tracker.volume = 32; 580 581 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); 582 break; 583 584 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 585 cid = avdtp_subevent_signaling_media_codec_sbc_configuration_get_avdtp_cid(packet); 586 if (cid != media_tracker.a2dp_cid) return; 587 588 media_tracker.remote_seid = a2dp_subevent_signaling_media_codec_sbc_configuration_get_remote_seid(packet); 589 590 sbc_configuration.reconfigure = a2dp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 591 sbc_configuration.num_channels = a2dp_subevent_signaling_media_codec_sbc_configuration_get_num_channels(packet); 592 sbc_configuration.sampling_frequency = a2dp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 593 sbc_configuration.block_length = a2dp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 594 sbc_configuration.subbands = a2dp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 595 sbc_configuration.min_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 596 sbc_configuration.max_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 597 598 channel_mode = a2dp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 599 allocation_method = a2dp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 600 601 printf("A2DP Source: Received SBC codec configuration, sampling frequency %u, a2dp_cid 0x%02x, local seid 0x%02x, remote seid 0x%02x.\n", 602 sbc_configuration.sampling_frequency, cid, 603 a2dp_subevent_signaling_media_codec_sbc_configuration_get_local_seid(packet), 604 a2dp_subevent_signaling_media_codec_sbc_configuration_get_remote_seid(packet)); 605 606 // Adapt Bluetooth spec definition to SBC Encoder expected input 607 sbc_configuration.allocation_method = (btstack_sbc_allocation_method_t)(allocation_method - 1); 608 sbc_configuration.num_channels = SBC_CHANNEL_MODE_STEREO; 609 switch (channel_mode){ 610 case AVDTP_SBC_JOINT_STEREO: 611 sbc_configuration.channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO; 612 break; 613 case AVDTP_SBC_STEREO: 614 sbc_configuration.channel_mode = SBC_CHANNEL_MODE_STEREO; 615 break; 616 case AVDTP_SBC_DUAL_CHANNEL: 617 sbc_configuration.channel_mode = SBC_CHANNEL_MODE_DUAL_CHANNEL; 618 break; 619 case AVDTP_SBC_MONO: 620 sbc_configuration.channel_mode = SBC_CHANNEL_MODE_MONO; 621 sbc_configuration.num_channels = 1; 622 break; 623 default: 624 btstack_assert(false); 625 break; 626 } 627 dump_sbc_configuration(&sbc_configuration); 628 629 btstack_sbc_encoder_init(&sbc_encoder_state, SBC_MODE_STANDARD, 630 sbc_configuration.block_length, sbc_configuration.subbands, 631 sbc_configuration.allocation_method, sbc_configuration.sampling_frequency, 632 sbc_configuration.max_bitpool_value, 633 sbc_configuration.channel_mode); 634 break; 635 } 636 637 case A2DP_SUBEVENT_SIGNALING_DELAY_REPORTING_CAPABILITY: 638 printf("A2DP Source: remote supports delay report, remote seid %d\n", 639 avdtp_subevent_signaling_delay_reporting_capability_get_remote_seid(packet)); 640 break; 641 case A2DP_SUBEVENT_SIGNALING_CAPABILITIES_DONE: 642 printf("A2DP Source: All capabilities reported, remote seid %d\n", 643 avdtp_subevent_signaling_capabilities_done_get_remote_seid(packet)); 644 break; 645 646 case A2DP_SUBEVENT_SIGNALING_DELAY_REPORT: 647 printf("A2DP Source: Received delay report of %d.%0d ms, local seid %d\n", 648 avdtp_subevent_signaling_delay_report_get_delay_100us(packet)/10, avdtp_subevent_signaling_delay_report_get_delay_100us(packet)%10, 649 avdtp_subevent_signaling_delay_report_get_local_seid(packet)); 650 break; 651 652 case A2DP_SUBEVENT_STREAM_ESTABLISHED: 653 a2dp_subevent_stream_established_get_bd_addr(packet, address); 654 status = a2dp_subevent_stream_established_get_status(packet); 655 if (status){ 656 printf("A2DP Source: Stream failed, status 0x%02x.\n", status); 657 break; 658 } 659 660 local_seid = a2dp_subevent_stream_established_get_local_seid(packet); 661 cid = a2dp_subevent_stream_established_get_a2dp_cid(packet); 662 663 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)); 664 665 a2dp_demo_hexcmod_configure_sample_rate(current_sample_rate); 666 media_tracker.stream_opened = 1; 667 data_source = STREAM_MOD; 668 status = a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 669 break; 670 671 case A2DP_SUBEVENT_STREAM_RECONFIGURED: 672 status = a2dp_subevent_stream_reconfigured_get_status(packet); 673 local_seid = a2dp_subevent_stream_reconfigured_get_local_seid(packet); 674 cid = a2dp_subevent_stream_reconfigured_get_a2dp_cid(packet); 675 676 if (status != ERROR_CODE_SUCCESS){ 677 printf("A2DP Source: Stream reconfiguration failed with status 0x%02x\n", status); 678 break; 679 } 680 681 printf("A2DP Source: Stream reconfigured a2dp_cid 0x%02x, local_seid 0x%02x\n", cid, local_seid); 682 a2dp_demo_hexcmod_configure_sample_rate(new_sample_rate); 683 status = a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 684 break; 685 686 case A2DP_SUBEVENT_STREAM_STARTED: 687 local_seid = a2dp_subevent_stream_started_get_local_seid(packet); 688 cid = a2dp_subevent_stream_started_get_a2dp_cid(packet); 689 690 play_info.status = AVRCP_PLAYBACK_STATUS_PLAYING; 691 if (media_tracker.avrcp_cid){ 692 avrcp_target_set_now_playing_info(media_tracker.avrcp_cid, &tracks[data_source], sizeof(tracks)/sizeof(avrcp_track_t)); 693 avrcp_target_set_playback_status(media_tracker.avrcp_cid, AVRCP_PLAYBACK_STATUS_PLAYING); 694 } 695 a2dp_demo_timer_start(&media_tracker); 696 printf("A2DP Source: Stream started, a2dp_cid 0x%02x, local_seid 0x%02x\n", cid, local_seid); 697 break; 698 699 case A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW: 700 local_seid = a2dp_subevent_streaming_can_send_media_packet_now_get_local_seid(packet); 701 cid = a2dp_subevent_signaling_media_codec_sbc_configuration_get_a2dp_cid(packet); 702 a2dp_demo_send_media_packet(); 703 break; 704 705 case A2DP_SUBEVENT_STREAM_SUSPENDED: 706 local_seid = a2dp_subevent_stream_suspended_get_local_seid(packet); 707 cid = a2dp_subevent_stream_suspended_get_a2dp_cid(packet); 708 709 play_info.status = AVRCP_PLAYBACK_STATUS_PAUSED; 710 if (media_tracker.avrcp_cid){ 711 avrcp_target_set_playback_status(media_tracker.avrcp_cid, AVRCP_PLAYBACK_STATUS_PAUSED); 712 } 713 printf("A2DP Source: Stream paused, a2dp_cid 0x%02x, local_seid 0x%02x\n", cid, local_seid); 714 715 a2dp_demo_timer_stop(&media_tracker); 716 break; 717 718 case A2DP_SUBEVENT_STREAM_RELEASED: 719 play_info.status = AVRCP_PLAYBACK_STATUS_STOPPED; 720 cid = a2dp_subevent_stream_released_get_a2dp_cid(packet); 721 local_seid = a2dp_subevent_stream_released_get_local_seid(packet); 722 723 printf("A2DP Source: Stream released, a2dp_cid 0x%02x, local_seid 0x%02x\n", cid, local_seid); 724 725 if (cid == media_tracker.a2dp_cid) { 726 media_tracker.stream_opened = 0; 727 printf("A2DP Source: Stream released.\n"); 728 } 729 if (media_tracker.avrcp_cid){ 730 avrcp_target_set_now_playing_info(media_tracker.avrcp_cid, NULL, sizeof(tracks)/sizeof(avrcp_track_t)); 731 avrcp_target_set_playback_status(media_tracker.avrcp_cid, AVRCP_PLAYBACK_STATUS_STOPPED); 732 } 733 a2dp_demo_timer_stop(&media_tracker); 734 break; 735 case A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 736 cid = a2dp_subevent_signaling_connection_released_get_a2dp_cid(packet); 737 if (cid == media_tracker.a2dp_cid) { 738 media_tracker.avrcp_cid = 0; 739 media_tracker.a2dp_cid = 0; 740 printf("A2DP Source: Signaling released.\n\n"); 741 } 742 break; 743 default: 744 break; 745 } 746 } 747 748 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 749 UNUSED(channel); 750 UNUSED(size); 751 bd_addr_t event_addr; 752 uint16_t local_cid; 753 uint8_t status = ERROR_CODE_SUCCESS; 754 755 if (packet_type != HCI_EVENT_PACKET) return; 756 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 757 758 switch (packet[2]){ 759 case AVRCP_SUBEVENT_CONNECTION_ESTABLISHED: 760 local_cid = avrcp_subevent_connection_established_get_avrcp_cid(packet); 761 status = avrcp_subevent_connection_established_get_status(packet); 762 if (status != ERROR_CODE_SUCCESS){ 763 printf("AVRCP: Connection failed, local cid 0x%02x, status 0x%02x\n", local_cid, status); 764 return; 765 } 766 media_tracker.avrcp_cid = local_cid; 767 avrcp_subevent_connection_established_get_bd_addr(packet, event_addr); 768 769 avrcp_target_set_now_playing_info(media_tracker.avrcp_cid, NULL, sizeof(tracks)/sizeof(avrcp_track_t)); 770 avrcp_target_set_unit_info(media_tracker.avrcp_cid, AVRCP_SUBUNIT_TYPE_AUDIO, company_id); 771 avrcp_target_set_subunit_info(media_tracker.avrcp_cid, AVRCP_SUBUNIT_TYPE_AUDIO, (uint8_t *)subunit_info, sizeof(subunit_info)); 772 773 avrcp_controller_get_supported_events(media_tracker.avrcp_cid); 774 775 printf("AVRCP: Channel successfully opened: media_tracker.avrcp_cid 0x%02x\n", media_tracker.avrcp_cid); 776 return; 777 778 case AVRCP_SUBEVENT_CONNECTION_RELEASED: 779 printf("AVRCP Target: Disconnected, avrcp_cid 0x%02x\n", avrcp_subevent_connection_released_get_avrcp_cid(packet)); 780 media_tracker.avrcp_cid = 0; 781 return; 782 default: 783 break; 784 } 785 786 if (status != ERROR_CODE_SUCCESS){ 787 printf("Responding to event 0x%02x failed with status 0x%02x\n", packet[2], status); 788 } 789 } 790 791 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 792 UNUSED(channel); 793 UNUSED(size); 794 uint8_t status = ERROR_CODE_SUCCESS; 795 796 if (packet_type != HCI_EVENT_PACKET) return; 797 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 798 799 switch (packet[2]){ 800 case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED: 801 media_tracker.volume = avrcp_subevent_notification_volume_changed_get_absolute_volume(packet); 802 printf("AVRCP Target: Volume set to %d%% (%d)\n", media_tracker.volume * 127/100, media_tracker.volume); 803 break; 804 case AVRCP_SUBEVENT_EVENT_IDS_QUERY: 805 status = avrcp_target_supported_events(media_tracker.avrcp_cid, events_num, events, sizeof(events)); 806 break; 807 case AVRCP_SUBEVENT_COMPANY_IDS_QUERY: 808 status = avrcp_target_supported_companies(media_tracker.avrcp_cid, companies_num, companies, sizeof(companies)); 809 break; 810 case AVRCP_SUBEVENT_PLAY_STATUS_QUERY: 811 status = avrcp_target_play_status(media_tracker.avrcp_cid, play_info.song_length_ms, play_info.song_position_ms, play_info.status); 812 break; 813 // case AVRCP_SUBEVENT_NOW_PLAYING_INFO_QUERY: 814 // status = avrcp_target_now_playing_info(avrcp_cid); 815 // break; 816 case AVRCP_SUBEVENT_OPERATION:{ 817 avrcp_operation_id_t operation_id = avrcp_subevent_operation_get_operation_id(packet); 818 switch (operation_id){ 819 case AVRCP_OPERATION_ID_PLAY: 820 printf("AVRCP Target: PLAY\n"); 821 status = a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 822 break; 823 case AVRCP_OPERATION_ID_PAUSE: 824 printf("AVRCP Target: PAUSE\n"); 825 status = a2dp_source_pause_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 826 break; 827 case AVRCP_OPERATION_ID_STOP: 828 printf("AVRCP Target: STOP\n"); 829 status = a2dp_source_disconnect(media_tracker.a2dp_cid); 830 break; 831 default: 832 printf("AVRCP Target: operation 0x%2x is not handled\n", operation_id); 833 return; 834 } 835 break; 836 } 837 838 default: 839 break; 840 } 841 842 if (status != ERROR_CODE_SUCCESS){ 843 printf("Responding to event 0x%02x failed with status 0x%02x\n", packet[2], status); 844 } 845 } 846 847 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 848 UNUSED(channel); 849 UNUSED(size); 850 uint8_t status = 0xFF; 851 852 if (packet_type != HCI_EVENT_PACKET) return; 853 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 854 855 status = packet[5]; 856 if (!media_tracker.avrcp_cid) return; 857 858 // ignore INTERIM status 859 if (status == AVRCP_CTYPE_RESPONSE_INTERIM) return; 860 861 switch (packet[2]){ 862 case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED: 863 printf("AVRCP Controller: notification absolute volume changed %d %%\n", avrcp_subevent_notification_volume_changed_get_absolute_volume(packet) * 100 / 127); 864 break; 865 case AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID: 866 printf("Remote supports EVENT_ID 0x%02x\n", avrcp_subevent_get_capability_event_id_get_event_id(packet)); 867 break; 868 case AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID_DONE: 869 printf("automatically enable notifications\n"); 870 avrcp_controller_enable_notification(media_tracker.avrcp_cid, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED); 871 break; 872 default: 873 break; 874 } 875 } 876 877 #ifdef HAVE_BTSTACK_STDIN 878 static void show_usage(void){ 879 bd_addr_t iut_address; 880 gap_local_bd_addr(iut_address); 881 printf("\n--- Bluetooth A2DP Source/AVRCP Demo %s ---\n", bd_addr_to_str(iut_address)); 882 printf("b - A2DP Source create connection to addr %s\n", device_addr_string); 883 printf("B - A2DP Source disconnect\n"); 884 printf("c - AVRCP create connection to addr %s\n", device_addr_string); 885 printf("C - AVRCP disconnect\n"); 886 printf("D - delete all link keys\n"); 887 888 printf("x - start streaming sine\n"); 889 if (hxcmod_initialized){ 890 printf("z - start streaming '%s'\n", mod_name); 891 } 892 printf("p - pause streaming\n"); 893 printf("w - reconfigure stream for 44100 Hz\n"); 894 printf("e - reconfigure stream for 48000 Hz\n"); 895 printf("t - volume up\n"); 896 printf("T - volume down\n"); 897 printf("v - volume up (via set absolute volume)\n"); 898 printf("V - volume down (via set absolute volume)\n"); 899 900 printf("---\n"); 901 } 902 903 static void stdin_process(char cmd){ 904 uint8_t status = ERROR_CODE_SUCCESS; 905 switch (cmd){ 906 case 'b': 907 status = a2dp_source_establish_stream(device_addr, &media_tracker.a2dp_cid); 908 printf("%c - Create A2DP Source connection to addr %s, cid 0x%02x.\n", cmd, bd_addr_to_str(device_addr), media_tracker.a2dp_cid); 909 break; 910 case 'B': 911 printf("%c - A2DP Source Disconnect from cid 0x%2x\n", cmd, media_tracker.a2dp_cid); 912 status = a2dp_source_disconnect(media_tracker.a2dp_cid); 913 break; 914 case 'c': 915 printf("%c - Create AVRCP connection to addr %s.\n", cmd, bd_addr_to_str(device_addr)); 916 status = avrcp_connect(device_addr, &media_tracker.avrcp_cid); 917 break; 918 case 'C': 919 printf("%c - AVRCP disconnect\n", cmd); 920 status = avrcp_disconnect(media_tracker.avrcp_cid); 921 break; 922 case 'D': 923 printf("Deleting all link keys\n"); 924 gap_delete_all_link_keys(); 925 break; 926 case '\n': 927 case '\r': 928 break; 929 930 case 't': 931 printf(" - volume up\n"); 932 status = avrcp_controller_volume_up(media_tracker.avrcp_cid); 933 break; 934 case 'T': 935 printf(" - volume down\n"); 936 status = avrcp_controller_volume_down(media_tracker.avrcp_cid); 937 break; 938 939 case 'v': 940 if (media_tracker.volume > 117){ 941 media_tracker.volume = 127; 942 } else { 943 media_tracker.volume += 10; 944 } 945 printf(" - volume up (via set absolute volume) %d%% (%d)\n", media_tracker.volume * 127/100, media_tracker.volume); 946 status = avrcp_controller_set_absolute_volume(media_tracker.avrcp_cid, media_tracker.volume); 947 break; 948 case 'V': 949 if (media_tracker.volume < 10){ 950 media_tracker.volume = 0; 951 } else { 952 media_tracker.volume -= 10; 953 } 954 printf(" - volume down (via set absolute volume) %d%% (%d)\n", media_tracker.volume * 127/100, media_tracker.volume); 955 status = avrcp_controller_set_absolute_volume(media_tracker.avrcp_cid, media_tracker.volume); 956 break; 957 958 case 'x': 959 if (media_tracker.avrcp_cid){ 960 avrcp_target_set_now_playing_info(media_tracker.avrcp_cid, &tracks[data_source], sizeof(tracks)/sizeof(avrcp_track_t)); 961 } 962 printf("%c - Play sine.\n", cmd); 963 data_source = STREAM_SINE; 964 if (!media_tracker.stream_opened) break; 965 status = a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 966 break; 967 case 'z': 968 if (media_tracker.avrcp_cid){ 969 avrcp_target_set_now_playing_info(media_tracker.avrcp_cid, &tracks[data_source], sizeof(tracks)/sizeof(avrcp_track_t)); 970 } 971 printf("%c - Play mod.\n", cmd); 972 data_source = STREAM_MOD; 973 if (!media_tracker.stream_opened) break; 974 status = a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 975 break; 976 977 case 'p': 978 if (!media_tracker.stream_opened) break; 979 printf("%c - Pause stream.\n", cmd); 980 status = a2dp_source_pause_stream(media_tracker.a2dp_cid, media_tracker.local_seid); 981 break; 982 983 case 'w': 984 if (!media_tracker.stream_opened) break; 985 if (play_info.status == AVRCP_PLAYBACK_STATUS_PLAYING){ 986 printf("Stream cannot be reconfigured while playing, please pause stream first\n"); 987 break; 988 } 989 new_sample_rate = 44100; 990 if (current_sample_rate == new_sample_rate){ 991 printf("%c - Stream already configured for %d Hz.\n", cmd, new_sample_rate); 992 } else { 993 printf("%c - Reconfigure for %d Hz.\n", cmd, new_sample_rate); 994 status = a2dp_source_reconfigure_stream_sampling_frequency(media_tracker.a2dp_cid, new_sample_rate); 995 } 996 break; 997 998 case 'e': 999 if (!media_tracker.stream_opened) break; 1000 if (play_info.status == AVRCP_PLAYBACK_STATUS_PLAYING){ 1001 printf("Stream cannot be reconfigured while playing, please pause stream first\n"); 1002 break; 1003 } 1004 new_sample_rate = 48000; 1005 if (current_sample_rate == new_sample_rate){ 1006 printf("%c - Stream already configured for %d Hz.\n", cmd, new_sample_rate); 1007 } else { 1008 printf("%c - Reconfigure for %d Hz.\n", cmd, new_sample_rate); 1009 status = a2dp_source_reconfigure_stream_sampling_frequency(media_tracker.a2dp_cid, new_sample_rate); 1010 } 1011 break; 1012 1013 default: 1014 show_usage(); 1015 return; 1016 } 1017 if (status != ERROR_CODE_SUCCESS){ 1018 printf("Could not perform command \'%c\', status 0x%02x\n", cmd, status); 1019 } 1020 } 1021 #endif 1022 1023 1024 int btstack_main(int argc, const char * argv[]); 1025 int btstack_main(int argc, const char * argv[]){ 1026 (void)argc; 1027 (void)argv; 1028 1029 int err = a2dp_source_and_avrcp_services_init(); 1030 if (err) return err; 1031 // turn on! 1032 hci_power_control(HCI_POWER_ON); 1033 return 0; 1034 } 1035 /* EXAMPLE_END */ 1036