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_sink_demo.c" 39 40 /* 41 * a2dp_sink_demo.c 42 */ 43 44 // ***************************************************************************** 45 /* EXAMPLE_START(a2dp_sink_demo): A2DP Sink - Receive Audio Stream and Control Playback 46 * 47 * @text This A2DP Sink example demonstrates how to use the A2DP Sink service to 48 * receive an audio data stream from a remote A2DP Source device. In addition, 49 * the AVRCP Controller is used to get information on currently played media, 50 * such are title, artist and album, as well as to control the playback, 51 * i.e. to play, stop, repeat, etc. If HAVE_BTSTACK_STDIN is set, press SPACE on 52 * the console to show the available AVDTP and AVRCP commands. 53 * 54 * @text To test with a remote device, e.g. a mobile phone, 55 * pair from the remote device with the demo, then start playing music on the remote device. 56 * Alternatively, set the device_addr_string to the Bluetooth address of your 57 * remote device in the code, and call connect from the UI. 58 * 59 * @text For more info on BTstack audio, see our blog post 60 * [A2DP Sink and Source on STM32 F4 Discovery Board](http://bluekitchen-gmbh.com/a2dp-sink-and-source-on-stm32-f4-discovery-board/). 61 * 62 */ 63 // ***************************************************************************** 64 65 #include <inttypes.h> 66 #include <stdint.h> 67 #include <stdio.h> 68 #include <stdlib.h> 69 #include <string.h> 70 71 #include "btstack.h" 72 #include "btstack_resample.h" 73 74 //#define AVRCP_BROWSING_ENABLED 75 76 // if volume control not supported by btstack_audio_sink, you can try to disable volume change notification 77 // to force the A2DP Source to reduce volume by attenuating the audio stream 78 #define SUPPORT_VOLUME_CHANGE_NOTIFICATION 79 80 #ifdef HAVE_BTSTACK_STDIN 81 #include "btstack_stdin.h" 82 #endif 83 84 #include "btstack_ring_buffer.h" 85 86 #ifdef HAVE_POSIX_FILE_IO 87 #include "wav_util.h" 88 #define STORE_TO_SBC_FILE 89 #define STORE_TO_WAV_FILE 90 #endif 91 92 #define NUM_CHANNELS 2 93 #define BYTES_PER_FRAME (2*NUM_CHANNELS) 94 #define MAX_SBC_FRAME_SIZE 120 95 96 // SBC Decoder for WAV file or live playback 97 static btstack_sbc_decoder_state_t state; 98 static btstack_sbc_mode_t mode = SBC_MODE_STANDARD; 99 100 // ring buffer for SBC Frames 101 // below 30: add samples, 30-40: fine, above 40: drop samples 102 #define OPTIMAL_FRAMES_MIN 30 103 #define OPTIMAL_FRAMES_MAX 40 104 #define ADDITIONAL_FRAMES 20 105 static uint8_t sbc_frame_storage[(OPTIMAL_FRAMES_MAX + ADDITIONAL_FRAMES) * MAX_SBC_FRAME_SIZE]; 106 static btstack_ring_buffer_t sbc_frame_ring_buffer; 107 static unsigned int sbc_frame_size; 108 109 // rest buffer for not fully used sbc frames, with additional frames for resampling 110 static uint8_t decoded_audio_storage[(128+16) * BYTES_PER_FRAME]; 111 static btstack_ring_buffer_t decoded_audio_ring_buffer; 112 113 static int audio_stream_started; 114 115 // temp storage of lower-layer request 116 static int16_t * request_buffer; 117 static int request_frames; 118 119 #define STORE_FROM_PLAYBACK 120 121 // WAV File 122 #ifdef STORE_TO_WAV_FILE 123 static uint32_t audio_frame_count = 0; 124 static char * wav_filename = "av2dp_sink_demo.wav"; 125 #endif 126 127 #ifdef STORE_TO_SBC_FILE 128 static FILE * sbc_file; 129 static char * sbc_filename = "av2dp_sink_demo.sbc"; 130 #endif 131 132 typedef struct { 133 int reconfigure; 134 int num_channels; 135 int sampling_frequency; 136 int channel_mode; 137 int block_length; 138 int subbands; 139 int allocation_method; 140 int min_bitpool_value; 141 int max_bitpool_value; 142 int frames_per_buffer; 143 } avdtp_media_codec_configuration_sbc_t; 144 145 static avdtp_media_codec_configuration_sbc_t sbc_configuration; 146 static int volume_percentage = 0; 147 148 #ifdef SUPPORT_VOLUME_CHANGE_NOTIFICATION 149 static uint8_t events_num = 3; 150 static uint8_t events[] = { 151 AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED, 152 AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED, 153 AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED 154 }; 155 #endif 156 157 static uint8_t companies_num = 1; 158 static uint8_t companies[] = { 159 0x00, 0x19, 0x58 //BT SIG registered CompanyID 160 }; 161 162 #ifdef HAVE_BTSTACK_STDIN 163 // pts: 164 static const char * device_addr_string = "6C:72:E7:10:22:EE"; 165 // mac 2013: static const char * device_addr_string = "84:38:35:65:d1:15"; 166 // iPhone 5S: static const char * device_addr_string = "54:E4:3A:26:A2:39"; 167 static bd_addr_t device_addr; 168 #endif 169 170 static btstack_packet_callback_registration_t hci_event_callback_registration; 171 172 static uint8_t sdp_avdtp_sink_service_buffer[150]; 173 static uint8_t sdp_avrcp_target_service_buffer[150]; 174 static uint8_t sdp_avrcp_controller_service_buffer[200]; 175 static uint8_t device_id_sdp_service_buffer[100]; 176 177 static uint16_t a2dp_cid = 0; 178 static uint8_t a2dp_local_seid = 0; 179 180 static uint16_t avrcp_cid = 0; 181 static uint8_t avrcp_connected = 0; 182 static uint8_t avrcp_subevent_value[100]; 183 184 static uint8_t media_sbc_codec_capabilities[] = { 185 0xFF,//(AVDTP_SBC_44100 << 4) | AVDTP_SBC_STEREO, 186 0xFF,//(AVDTP_SBC_BLOCK_LENGTH_16 << 4) | (AVDTP_SBC_SUBBANDS_8 << 2) | AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS, 187 2, 53 188 }; 189 190 static uint8_t media_sbc_codec_configuration[] = { 191 (AVDTP_SBC_44100 << 4) | AVDTP_SBC_STEREO, 192 (AVDTP_SBC_BLOCK_LENGTH_16 << 4) | (AVDTP_SBC_SUBBANDS_8 << 2) | AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS, 193 2, 53 194 }; 195 196 static int media_initialized = 0; 197 static btstack_resample_t resample_instance; 198 199 /* @section Main Application Setup 200 * 201 * @text The Listing MainConfiguration shows how to setup AD2P Sink and AVRCP services. 202 * Besides calling init() method for each service, you'll also need to register several packet handlers: 203 * - hci_packet_handler - handles legacy pairing, here by using fixed '0000' pin code. 204 * - a2dp_sink_packet_handler - handles events on stream connection status (established, released), the media codec configuration, and, the status of the stream itself (opened, paused, stopped). 205 * - handle_l2cap_media_data_packet - used to receive streaming data. If STORE_TO_WAV_FILE directive (check btstack_config.h) is used, the SBC decoder will be used to decode the SBC data into PCM frames. The resulting PCM frames are then processed in the SBC Decoder callback. 206 * - avrcp_packet_handler - receives connect/disconnect event. 207 * - avrcp_controller_packet_handler - receives answers for sent AVRCP commands. 208 * - avrcp_target_packet_handler - receives AVRCP commands, and registered notifications. 209 * - 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. 210 * 211 * @text To announce A2DP Sink and AVRCP services, you need to create corresponding 212 * SDP records and register them with the SDP service. 213 * 214 * @text Note, currently only the SBC codec is supported. 215 * If you want to store the audio data in a file, you'll need to define STORE_TO_WAV_FILE. 216 * If STORE_TO_WAV_FILE directive is defined, the SBC decoder needs to get initialized when a2dp_sink_packet_handler receives event A2DP_SUBEVENT_STREAM_STARTED. 217 * The initialization of the SBC decoder requires a callback that handles PCM data: 218 * - handle_pcm_data - handles PCM audio frames. Here, they are stored a in wav file if STORE_TO_WAV_FILE is defined, and/or played using the audio library. 219 */ 220 221 /* LISTING_START(MainConfiguration): Setup Audio Sink and AVRCP services */ 222 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 223 static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size); 224 static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size); 225 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 226 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 227 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 228 #ifdef HAVE_BTSTACK_STDIN 229 static void stdin_process(char cmd); 230 #endif 231 232 static int a2dp_and_avrcp_setup(void){ 233 l2cap_init(); 234 // Initialize AVDTP Sink 235 a2dp_sink_init(); 236 a2dp_sink_register_packet_handler(&a2dp_sink_packet_handler); 237 a2dp_sink_register_media_handler(&handle_l2cap_media_data_packet); 238 239 // Create stream endpoint 240 avdtp_stream_endpoint_t * local_stream_endpoint = a2dp_sink_create_stream_endpoint(AVDTP_AUDIO, 241 AVDTP_CODEC_SBC, media_sbc_codec_capabilities, sizeof(media_sbc_codec_capabilities), 242 media_sbc_codec_configuration, sizeof(media_sbc_codec_configuration)); 243 if (!local_stream_endpoint){ 244 printf("A2DP Sink: not enough memory to create local stream endpoint\n"); 245 return 1; 246 } 247 248 // Store stream enpoint's SEP ID, as it is used by A2DP API to indentify the stream endpoint 249 a2dp_local_seid = avdtp_local_seid(local_stream_endpoint); 250 251 // Initialize AVRCP service 252 avrcp_init(); 253 avrcp_register_packet_handler(&avrcp_packet_handler); 254 255 // Initialize AVRCP Controller 256 avrcp_controller_init(); 257 avrcp_controller_register_packet_handler(&avrcp_controller_packet_handler); 258 259 // Initialize AVRCP Target 260 avrcp_target_init(); 261 avrcp_target_register_packet_handler(&avrcp_target_packet_handler); 262 263 // Initialize SDP 264 sdp_init(); 265 266 // Create A2DP Sink service record and register it with SDP 267 memset(sdp_avdtp_sink_service_buffer, 0, sizeof(sdp_avdtp_sink_service_buffer)); 268 a2dp_sink_create_sdp_record(sdp_avdtp_sink_service_buffer, 0x10001, AVDTP_SINK_FEATURE_MASK_HEADPHONE, NULL, NULL); 269 sdp_register_service(sdp_avdtp_sink_service_buffer); 270 271 // Create AVRCP Controller service record and register it with SDP 272 memset(sdp_avrcp_controller_service_buffer, 0, sizeof(sdp_avrcp_controller_service_buffer)); 273 uint16_t controller_supported_features = AVRCP_FEATURE_MASK_CATEGORY_PLAYER_OR_RECORDER; 274 #ifdef AVRCP_BROWSING_ENABLED 275 controller_supported_features |= AVRCP_FEATURE_MASK_BROWSING; 276 #endif 277 avrcp_controller_create_sdp_record(sdp_avrcp_controller_service_buffer, 0x10002, controller_supported_features, NULL, NULL); 278 sdp_register_service(sdp_avrcp_controller_service_buffer); 279 280 // Create AVRCP Target service record and register it with SDP 281 memset(sdp_avrcp_target_service_buffer, 0, sizeof(sdp_avrcp_target_service_buffer)); 282 uint16_t target_supported_features = AVRCP_FEATURE_MASK_CATEGORY_MONITOR_OR_AMPLIFIER; 283 avrcp_target_create_sdp_record(sdp_avrcp_target_service_buffer, 0x10003, target_supported_features, NULL, NULL); 284 sdp_register_service(sdp_avrcp_target_service_buffer); 285 286 // Create Device ID (PnP) service record and register it with SDP 287 memset(device_id_sdp_service_buffer, 0, sizeof(device_id_sdp_service_buffer)); 288 device_id_create_sdp_record(device_id_sdp_service_buffer, 0x10004, DEVICE_ID_VENDOR_ID_SOURCE_BLUETOOTH, BLUETOOTH_COMPANY_ID_BLUEKITCHEN_GMBH, 1, 1); 289 sdp_register_service(device_id_sdp_service_buffer); 290 291 // Set local name with a template Bluetooth address, that will be automatically 292 // replaced with a actual address once it is available, i.e. when BTstack boots 293 // up and starts talking to a Bluetooth module. 294 gap_set_local_name("A2DP Sink Demo 00:00:00:00:00:00"); 295 gap_discoverable_control(1); 296 gap_set_class_of_device(0x200408); 297 298 // Register for HCI events 299 hci_event_callback_registration.callback = &hci_packet_handler; 300 hci_add_event_handler(&hci_event_callback_registration); 301 302 #ifdef HAVE_POSIX_FILE_IO 303 if (!btstack_audio_sink_get_instance()){ 304 printf("No audio playback.\n"); 305 } else { 306 printf("Audio playback supported.\n"); 307 } 308 #ifdef STORE_TO_WAV_FILE 309 printf("Audio will be stored to \'%s\' file.\n", wav_filename); 310 #endif 311 #endif 312 return 0; 313 } 314 /* LISTING_END */ 315 316 static void playback_handler(int16_t * buffer, uint16_t num_audio_frames){ 317 318 #ifdef STORE_TO_WAV_FILE 319 int wav_samples = num_audio_frames * NUM_CHANNELS; 320 int16_t * wav_buffer = buffer; 321 #endif 322 323 // called from lower-layer but guaranteed to be on main thread 324 if (sbc_frame_size == 0){ 325 memset(buffer, 0, num_audio_frames * BYTES_PER_FRAME); 326 return; 327 } 328 329 // first fill from resampled audio 330 uint32_t bytes_read; 331 btstack_ring_buffer_read(&decoded_audio_ring_buffer, (uint8_t *) buffer, num_audio_frames * BYTES_PER_FRAME, &bytes_read); 332 buffer += bytes_read / NUM_CHANNELS; 333 num_audio_frames -= bytes_read / BYTES_PER_FRAME; 334 335 // then start decoding sbc frames using request_* globals 336 request_buffer = buffer; 337 request_frames = num_audio_frames; 338 while (request_frames && btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) >= sbc_frame_size){ 339 // decode frame 340 uint8_t sbc_frame[MAX_SBC_FRAME_SIZE]; 341 btstack_ring_buffer_read(&sbc_frame_ring_buffer, sbc_frame, sbc_frame_size, &bytes_read); 342 btstack_sbc_decoder_process_data(&state, 0, sbc_frame, sbc_frame_size); 343 } 344 345 #ifdef STORE_TO_WAV_FILE 346 audio_frame_count += num_audio_frames; 347 wav_writer_write_int16(wav_samples, wav_buffer); 348 #endif 349 } 350 351 static void handle_pcm_data(int16_t * data, int num_audio_frames, int num_channels, int sample_rate, void * context){ 352 UNUSED(sample_rate); 353 UNUSED(context); 354 UNUSED(num_channels); // must be stereo == 2 355 356 const btstack_audio_sink_t * audio_sink = btstack_audio_sink_get_instance(); 357 if (!audio_sink){ 358 #ifdef STORE_TO_WAV_FILE 359 audio_frame_count += num_audio_frames; 360 wav_writer_write_int16(num_audio_frames * NUM_CHANNELS, data); 361 #endif 362 return; 363 } 364 365 // resample into request buffer - add some additional space for resampling 366 int16_t output_buffer[(128+16) * NUM_CHANNELS]; // 16 * 8 * 2 367 uint32_t resampled_frames = btstack_resample_block(&resample_instance, data, num_audio_frames, output_buffer); 368 369 // store data in btstack_audio buffer first 370 int frames_to_copy = btstack_min(resampled_frames, request_frames); 371 memcpy(request_buffer, output_buffer, frames_to_copy * BYTES_PER_FRAME); 372 request_frames -= frames_to_copy; 373 request_buffer += frames_to_copy * NUM_CHANNELS; 374 375 // and rest in ring buffer 376 int frames_to_store = resampled_frames - frames_to_copy; 377 if (frames_to_store){ 378 int status = btstack_ring_buffer_write(&decoded_audio_ring_buffer, (uint8_t *)&output_buffer[frames_to_copy * NUM_CHANNELS], frames_to_store * BYTES_PER_FRAME); 379 if (status){ 380 printf("Error storing samples in PCM ring buffer!!!\n"); 381 } 382 } 383 } 384 385 static int media_processing_init(avdtp_media_codec_configuration_sbc_t configuration){ 386 if (media_initialized) return 0; 387 388 btstack_sbc_decoder_init(&state, mode, handle_pcm_data, NULL); 389 390 #ifdef STORE_TO_WAV_FILE 391 wav_writer_open(wav_filename, configuration.num_channels, configuration.sampling_frequency); 392 #endif 393 394 #ifdef STORE_TO_SBC_FILE 395 sbc_file = fopen(sbc_filename, "wb"); 396 #endif 397 398 btstack_ring_buffer_init(&sbc_frame_ring_buffer, sbc_frame_storage, sizeof(sbc_frame_storage)); 399 btstack_ring_buffer_init(&decoded_audio_ring_buffer, decoded_audio_storage, sizeof(decoded_audio_storage)); 400 btstack_resample_init(&resample_instance, configuration.num_channels); 401 402 // setup audio playback 403 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 404 if (audio){ 405 audio->init(NUM_CHANNELS, configuration.sampling_frequency, &playback_handler); 406 } 407 408 audio_stream_started = 0; 409 media_initialized = 1; 410 return 0; 411 } 412 413 static void media_processing_start(void){ 414 if (!media_initialized) return; 415 // setup audio playback 416 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 417 if (audio){ 418 audio->start_stream(); 419 } 420 audio_stream_started = 1; 421 } 422 423 static void media_processing_pause(void){ 424 if (!media_initialized) return; 425 // stop audio playback 426 audio_stream_started = 0; 427 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 428 if (audio){ 429 audio->stop_stream(); 430 } 431 } 432 433 static void media_processing_close(void){ 434 if (!media_initialized) return; 435 media_initialized = 0; 436 audio_stream_started = 0; 437 sbc_frame_size = 0; 438 439 #ifdef STORE_TO_WAV_FILE 440 wav_writer_close(); 441 uint32_t total_frames_nr = state.good_frames_nr + state.bad_frames_nr + state.zero_frames_nr; 442 443 printf("WAV Writer: Decoding done. Processed %u SBC frames:\n - %d good\n - %d bad\n", total_frames_nr, state.good_frames_nr, total_frames_nr - state.good_frames_nr); 444 printf("WAV Writer: Wrote %u audio frames to wav file: %s\n", audio_frame_count, wav_filename); 445 #endif 446 447 #ifdef STORE_TO_SBC_FILE 448 fclose(sbc_file); 449 #endif 450 451 // stop audio playback 452 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 453 if (audio){ 454 printf("close stream\n"); 455 audio->close(); 456 } 457 } 458 459 /* @section Handle Media Data Packet 460 * 461 * @text Here the audio data, are received through the handle_l2cap_media_data_packet callback. 462 * Currently, only the SBC media codec is supported. Hence, the media data consists of the media packet header and the SBC packet. 463 * The SBC frame will be stored in a ring buffer for later processing (instead of decoding it to PCM right away which would require a much larger buffer). 464 * If the audio stream wasn't started already and there are enough SBC frames in the ring buffer, start playback. 465 */ 466 467 static int read_media_data_header(uint8_t * packet, int size, int * offset, avdtp_media_packet_header_t * media_header); 468 static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header); 469 470 static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size){ 471 UNUSED(seid); 472 int pos = 0; 473 474 avdtp_media_packet_header_t media_header; 475 if (!read_media_data_header(packet, size, &pos, &media_header)) return; 476 477 avdtp_sbc_codec_header_t sbc_header; 478 if (!read_sbc_header(packet, size, &pos, &sbc_header)) return; 479 480 #ifdef STORE_TO_SBC_FILE 481 fwrite(packet+pos, size-pos, 1, sbc_file); 482 #endif 483 484 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 485 // process data right away if there's no audio implementation active, e.g. on posix systems to store as .wav 486 if (!audio){ 487 btstack_sbc_decoder_process_data(&state, 0, packet+pos, size-pos); 488 return; 489 } 490 491 // store sbc frame size for buffer management 492 sbc_frame_size = (size-pos)/ sbc_header.num_frames; 493 494 int status = btstack_ring_buffer_write(&sbc_frame_ring_buffer, packet+pos, size-pos); 495 if (status){ 496 printf("Error storing samples in SBC ring buffer!!!\n"); 497 } 498 499 // decide on audio sync drift based on number of sbc frames in queue 500 int sbc_frames_in_buffer = btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) / sbc_frame_size; 501 uint32_t resampling_factor; 502 503 // nomimal factor (fixed-point 2^16) and compensation offset 504 uint32_t nomimal_factor = 0x10000; 505 uint32_t compensation = 0x00100; 506 507 if (sbc_frames_in_buffer < OPTIMAL_FRAMES_MIN){ 508 resampling_factor = nomimal_factor - compensation; // stretch samples 509 } else if (sbc_frames_in_buffer <= OPTIMAL_FRAMES_MAX){ 510 resampling_factor = nomimal_factor; // nothing to do 511 } else { 512 resampling_factor = nomimal_factor + compensation; // compress samples 513 } 514 515 btstack_resample_set_factor(&resample_instance, resampling_factor); 516 517 // start stream if enough frames buffered 518 if (!audio_stream_started && sbc_frames_in_buffer >= OPTIMAL_FRAMES_MIN){ 519 audio_stream_started = 1; 520 // setup audio playback 521 if (audio){ 522 audio->start_stream(); 523 } 524 } 525 } 526 527 static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header){ 528 int sbc_header_len = 12; // without crc 529 int pos = *offset; 530 531 if (size - pos < sbc_header_len){ 532 printf("Not enough data to read SBC header, expected %d, received %d\n", sbc_header_len, size-pos); 533 return 0; 534 } 535 536 sbc_header->fragmentation = get_bit16(packet[pos], 7); 537 sbc_header->starting_packet = get_bit16(packet[pos], 6); 538 sbc_header->last_packet = get_bit16(packet[pos], 5); 539 sbc_header->num_frames = packet[pos] & 0x0f; 540 pos++; 541 *offset = pos; 542 return 1; 543 } 544 545 static int read_media_data_header(uint8_t *packet, int size, int *offset, avdtp_media_packet_header_t *media_header){ 546 int media_header_len = 12; // without crc 547 int pos = *offset; 548 549 if (size - pos < media_header_len){ 550 printf("Not enough data to read media packet header, expected %d, received %d\n", media_header_len, size-pos); 551 return 0; 552 } 553 554 media_header->version = packet[pos] & 0x03; 555 media_header->padding = get_bit16(packet[pos],2); 556 media_header->extension = get_bit16(packet[pos],3); 557 media_header->csrc_count = (packet[pos] >> 4) & 0x0F; 558 pos++; 559 560 media_header->marker = get_bit16(packet[pos],0); 561 media_header->payload_type = (packet[pos] >> 1) & 0x7F; 562 pos++; 563 564 media_header->sequence_number = big_endian_read_16(packet, pos); 565 pos+=2; 566 567 media_header->timestamp = big_endian_read_32(packet, pos); 568 pos+=4; 569 570 media_header->synchronization_source = big_endian_read_32(packet, pos); 571 pos+=4; 572 *offset = pos; 573 return 1; 574 } 575 576 static void dump_sbc_configuration(avdtp_media_codec_configuration_sbc_t configuration){ 577 printf(" - num_channels: %d\n", configuration.num_channels); 578 printf(" - sampling_frequency: %d\n", configuration.sampling_frequency); 579 printf(" - channel_mode: %d\n", configuration.channel_mode); 580 printf(" - block_length: %d\n", configuration.block_length); 581 printf(" - subbands: %d\n", configuration.subbands); 582 printf(" - allocation_method: %d\n", configuration.allocation_method); 583 printf(" - bitpool_value [%d, %d] \n", configuration.min_bitpool_value, configuration.max_bitpool_value); 584 printf("\n"); 585 } 586 587 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 588 UNUSED(channel); 589 UNUSED(size); 590 uint16_t local_cid; 591 uint8_t status = 0xFF; 592 bd_addr_t adress; 593 594 if (packet_type != HCI_EVENT_PACKET) return; 595 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 596 switch (packet[2]){ 597 case AVRCP_SUBEVENT_CONNECTION_ESTABLISHED: { 598 local_cid = avrcp_subevent_connection_established_get_avrcp_cid(packet); 599 status = avrcp_subevent_connection_established_get_status(packet); 600 if (status != ERROR_CODE_SUCCESS){ 601 printf("AVRCP: Connection failed: status 0x%02x\n", status); 602 avrcp_cid = 0; 603 return; 604 } 605 606 avrcp_cid = local_cid; 607 avrcp_connected = 1; 608 avrcp_subevent_connection_established_get_bd_addr(packet, adress); 609 printf("AVRCP: Connected to %s, cid 0x%02x\n", bd_addr_to_str(adress), avrcp_cid); 610 611 // automatically enable notifications 612 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED); 613 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED); 614 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 615 return; 616 } 617 618 case AVRCP_SUBEVENT_CONNECTION_RELEASED: 619 printf("AVRCP: Channel released: cid 0x%02x\n", avrcp_subevent_connection_released_get_avrcp_cid(packet)); 620 avrcp_cid = 0; 621 avrcp_connected = 0; 622 return; 623 default: 624 break; 625 } 626 } 627 628 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 629 UNUSED(channel); 630 UNUSED(size); 631 uint8_t status = 0xFF; 632 633 if (packet_type != HCI_EVENT_PACKET) return; 634 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 635 636 status = packet[5]; 637 if (!avrcp_cid) return; 638 639 // ignore INTERIM status 640 if (status == AVRCP_CTYPE_RESPONSE_INTERIM){ 641 switch (packet[2]){ 642 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED:{ 643 uint32_t playback_position_ms = avrcp_subevent_notification_playback_pos_changed_get_playback_position_ms(packet); 644 if (playback_position_ms == AVRCP_NO_TRACK_SELECTED_PLAYBACK_POSITION_CHANGED){ 645 printf("AVRCP Controller: playback position changed, no track is selected\n"); 646 } 647 break; 648 } 649 default: 650 break; 651 } 652 return; 653 } 654 655 memset(avrcp_subevent_value, 0, sizeof(avrcp_subevent_value)); 656 switch (packet[2]){ 657 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED: 658 printf("AVRCP Controller: Playback position changed, position %d ms\n", (unsigned int) avrcp_subevent_notification_playback_pos_changed_get_playback_position_ms(packet)); 659 break; 660 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_STATUS_CHANGED: 661 printf("AVRCP Controller: Playback status changed %s\n", avrcp_play_status2str(avrcp_subevent_notification_playback_status_changed_get_play_status(packet))); 662 return; 663 case AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED: 664 printf("AVRCP Controller: Playing content changed\n"); 665 return; 666 case AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED: 667 printf("AVRCP Controller: Track changed\n"); 668 return; 669 case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED: 670 printf("AVRCP Controller: Absolute volume changed %d\n", avrcp_subevent_notification_volume_changed_get_absolute_volume(packet)); 671 return; 672 case AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED: 673 printf("AVRCP Controller: Changed\n"); 674 return; 675 case AVRCP_SUBEVENT_SHUFFLE_AND_REPEAT_MODE:{ 676 uint8_t shuffle_mode = avrcp_subevent_shuffle_and_repeat_mode_get_shuffle_mode(packet); 677 uint8_t repeat_mode = avrcp_subevent_shuffle_and_repeat_mode_get_repeat_mode(packet); 678 printf("AVRCP Controller: %s, %s\n", avrcp_shuffle2str(shuffle_mode), avrcp_repeat2str(repeat_mode)); 679 break; 680 } 681 case AVRCP_SUBEVENT_NOW_PLAYING_TRACK_INFO: 682 printf("AVRCP Controller: Track: %d\n", avrcp_subevent_now_playing_track_info_get_track(packet)); 683 break; 684 685 case AVRCP_SUBEVENT_NOW_PLAYING_TOTAL_TRACKS_INFO: 686 printf("AVRCP Controller: Total Tracks: %d\n", avrcp_subevent_now_playing_total_tracks_info_get_total_tracks(packet)); 687 break; 688 689 case AVRCP_SUBEVENT_NOW_PLAYING_TITLE_INFO: 690 if (avrcp_subevent_now_playing_title_info_get_value_len(packet) > 0){ 691 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_title_info_get_value(packet), avrcp_subevent_now_playing_title_info_get_value_len(packet)); 692 printf("AVRCP Controller: Title: %s\n", avrcp_subevent_value); 693 } 694 break; 695 696 case AVRCP_SUBEVENT_NOW_PLAYING_ARTIST_INFO: 697 if (avrcp_subevent_now_playing_artist_info_get_value_len(packet) > 0){ 698 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_artist_info_get_value(packet), avrcp_subevent_now_playing_artist_info_get_value_len(packet)); 699 printf("AVRCP Controller: Artist: %s\n", avrcp_subevent_value); 700 } 701 break; 702 703 case AVRCP_SUBEVENT_NOW_PLAYING_ALBUM_INFO: 704 if (avrcp_subevent_now_playing_album_info_get_value_len(packet) > 0){ 705 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_album_info_get_value(packet), avrcp_subevent_now_playing_album_info_get_value_len(packet)); 706 printf("AVRCP Controller: Album: %s\n", avrcp_subevent_value); 707 } 708 break; 709 710 case AVRCP_SUBEVENT_NOW_PLAYING_GENRE_INFO: 711 if (avrcp_subevent_now_playing_genre_info_get_value_len(packet) > 0){ 712 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_genre_info_get_value(packet), avrcp_subevent_now_playing_genre_info_get_value_len(packet)); 713 printf("AVRCP Controller: Genre: %s\n", avrcp_subevent_value); 714 } 715 break; 716 717 case AVRCP_SUBEVENT_PLAY_STATUS: 718 printf("AVRCP Controller: Song length %"PRIu32" ms, Song position %"PRIu32" ms, Play status %s\n", 719 avrcp_subevent_play_status_get_song_length(packet), 720 avrcp_subevent_play_status_get_song_position(packet), 721 avrcp_play_status2str(avrcp_subevent_play_status_get_play_status(packet))); 722 break; 723 724 case AVRCP_SUBEVENT_OPERATION_COMPLETE: 725 printf("AVRCP Controller: %s complete\n", avrcp_operation2str(avrcp_subevent_operation_complete_get_operation_id(packet))); 726 break; 727 728 case AVRCP_SUBEVENT_OPERATION_START: 729 printf("AVRCP Controller: %s start\n", avrcp_operation2str(avrcp_subevent_operation_start_get_operation_id(packet))); 730 break; 731 732 case AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_END: 733 printf("AVRCP Controller: Track reached end\n"); 734 break; 735 736 case AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE: 737 printf("A2DP Sink : Set Player App Value %s\n", avrcp_ctype2str(avrcp_subevent_player_application_value_response_get_command_type(packet))); 738 break; 739 740 741 default: 742 printf("AVRCP Controller: Event 0x%02x is not parsed\n", packet[2]); 743 break; 744 } 745 } 746 747 static void avrcp_volume_changed(uint8_t volume){ 748 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 749 if (audio){ 750 audio->set_volume(volume); 751 } 752 } 753 754 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 755 UNUSED(channel); 756 UNUSED(size); 757 758 if (packet_type != HCI_EVENT_PACKET) return; 759 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 760 761 uint8_t volume; 762 763 switch (packet[2]){ 764 case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED: 765 volume = avrcp_subevent_notification_volume_changed_get_absolute_volume(packet); 766 volume_percentage = volume * 100 / 127; 767 printf("AVRCP Target : Volume set to %d%% (%d)\n", volume_percentage, volume); 768 avrcp_volume_changed(volume); 769 break; 770 771 case AVRCP_SUBEVENT_EVENT_IDS_QUERY: 772 #ifdef SUPPORT_VOLUME_CHANGE_NOTIFICATION 773 avrcp_target_supported_events(avrcp_cid, events_num, events, sizeof(events)); 774 #else 775 avrcp_target_supported_events(avrcp_cid, 0, NULL, 0); 776 #endif 777 break; 778 case AVRCP_SUBEVENT_COMPANY_IDS_QUERY: 779 avrcp_target_supported_companies(avrcp_cid, companies_num, companies, sizeof(companies)); 780 break; 781 case AVRCP_SUBEVENT_OPERATION:{ 782 avrcp_operation_id_t operation_id = avrcp_subevent_operation_get_operation_id(packet); 783 switch (operation_id){ 784 case AVRCP_OPERATION_ID_PLAY: 785 printf("AVRCP Target : PLAY\n"); 786 break; 787 case AVRCP_OPERATION_ID_PAUSE: 788 printf("AVRCP Target : PAUSE\n"); 789 break; 790 case AVRCP_OPERATION_ID_STOP: 791 printf("AVRCP Target : STOP\n"); 792 break; 793 case AVRCP_OPERATION_ID_REWIND: 794 printf("AVRCP Target : REWIND\n"); 795 break; 796 case AVRCP_OPERATION_ID_FAST_FORWARD: 797 printf("AVRCP Target : FAST_FORWARD\n"); 798 break; 799 case AVRCP_OPERATION_ID_FORWARD: 800 printf("AVRCP Target : FORWARD\n"); 801 break; 802 case AVRCP_OPERATION_ID_BACKWARD: 803 printf("AVRCP Target : BACKWARD\n"); 804 break; 805 case AVRCP_OPERATION_ID_SKIP: 806 printf("AVRCP Target : SKIP\n"); 807 break; 808 case AVRCP_OPERATION_ID_MUTE: 809 printf("AVRCP Target : MUTE\n"); 810 break; 811 case AVRCP_OPERATION_ID_CHANNEL_UP: 812 printf("AVRCP Target : CHANNEL_UP\n"); 813 break; 814 case AVRCP_OPERATION_ID_CHANNEL_DOWN: 815 printf("AVRCP Target : CHANNEL_DOWN\n"); 816 break; 817 case AVRCP_OPERATION_ID_SELECT: 818 printf("AVRCP Target : SELECT\n"); 819 break; 820 case AVRCP_OPERATION_ID_UP: 821 printf("AVRCP Target : UP\n"); 822 break; 823 case AVRCP_OPERATION_ID_DOWN: 824 printf("AVRCP Target : DOWN\n"); 825 break; 826 case AVRCP_OPERATION_ID_LEFT: 827 printf("AVRCP Target : LEFT\n"); 828 break; 829 case AVRCP_OPERATION_ID_RIGHT: 830 printf("AVRCP Target : RIGTH\n"); 831 break; 832 case AVRCP_OPERATION_ID_ROOT_MENU: 833 printf("AVRCP Target : ROOT_MENU\n"); 834 break; 835 default: 836 return; 837 } 838 break; 839 } 840 default: 841 printf("AVRCP Target : Event 0x%02x is not parsed\n", packet[2]); 842 break; 843 } 844 } 845 846 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 847 UNUSED(channel); 848 UNUSED(size); 849 if (packet_type != HCI_EVENT_PACKET) return; 850 if (hci_event_packet_get_type(packet) == HCI_EVENT_PIN_CODE_REQUEST) { 851 bd_addr_t address; 852 printf("Pin code request - using '0000'\n"); 853 hci_event_pin_code_request_get_bd_addr(packet, address); 854 gap_pin_code_response(address, "0000"); 855 } 856 } 857 858 static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 859 UNUSED(channel); 860 UNUSED(size); 861 bd_addr_t address; 862 uint8_t status; 863 864 if (packet_type != HCI_EVENT_PACKET) return; 865 if (hci_event_packet_get_type(packet) != HCI_EVENT_A2DP_META) return; 866 867 switch (packet[2]){ 868 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 869 printf("A2DP Sink : Received non SBC codec - not implemented\n"); 870 break; 871 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 872 printf("A2DP Sink : Received SBC codec configuration\n"); 873 sbc_configuration.reconfigure = a2dp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 874 sbc_configuration.num_channels = a2dp_subevent_signaling_media_codec_sbc_configuration_get_num_channels(packet); 875 sbc_configuration.sampling_frequency = a2dp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 876 sbc_configuration.channel_mode = a2dp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 877 sbc_configuration.block_length = a2dp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 878 sbc_configuration.subbands = a2dp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 879 sbc_configuration.allocation_method = a2dp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 880 sbc_configuration.min_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 881 sbc_configuration.max_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 882 sbc_configuration.frames_per_buffer = sbc_configuration.subbands * sbc_configuration.block_length; 883 dump_sbc_configuration(sbc_configuration); 884 885 if (sbc_configuration.reconfigure){ 886 media_processing_close(); 887 } 888 // prepare media processing 889 media_processing_init(sbc_configuration); 890 break; 891 } 892 case A2DP_SUBEVENT_STREAM_ESTABLISHED: 893 a2dp_subevent_stream_established_get_bd_addr(packet, address); 894 status = a2dp_subevent_stream_established_get_status(packet); 895 896 if (status){ 897 printf("A2DP Sink : Streaming connection failed, status 0x%02x\n", status); 898 break; 899 } 900 901 a2dp_cid = a2dp_subevent_stream_established_get_a2dp_cid(packet); 902 memcpy(device_addr, address, 6); 903 printf("A2DP Sink : Streaming connection is established, address %s, cid 0x%02X, local seid %d\n", bd_addr_to_str(address), a2dp_cid, a2dp_local_seid); 904 break; 905 906 case A2DP_SUBEVENT_STREAM_STARTED: 907 printf("A2DP Sink : Stream started\n"); 908 media_processing_start(); 909 break; 910 911 case A2DP_SUBEVENT_STREAM_SUSPENDED: 912 printf("A2DP Sink : Stream paused\n"); 913 media_processing_pause(); 914 break; 915 916 case A2DP_SUBEVENT_STREAM_RELEASED: 917 printf("A2DP Sink : Stream released\n"); 918 media_processing_close(); 919 break; 920 921 case A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 922 printf("A2DP Sink : Signaling connection released\n"); 923 media_processing_close(); 924 break; 925 926 default: 927 printf("A2DP Sink : Not parsed 0x%02x\n", packet[2]); 928 break; 929 } 930 } 931 932 #ifdef HAVE_BTSTACK_STDIN 933 static void show_usage(void){ 934 bd_addr_t iut_address; 935 gap_local_bd_addr(iut_address); 936 printf("\n--- Bluetooth AVDTP Sink/AVRCP Connection Test Console %s ---\n", bd_addr_to_str(iut_address)); 937 printf("b - AVDTP Sink create connection to addr %s\n", bd_addr_to_str(device_addr)); 938 printf("B - AVDTP Sink disconnect\n"); 939 printf("c - AVRCP create connection to addr %s\n", bd_addr_to_str(device_addr)); 940 printf("C - AVRCP disconnect\n"); 941 942 printf("w - delay report\n"); 943 944 printf("\n--- Bluetooth AVRCP Commands %s ---\n", bd_addr_to_str(iut_address)); 945 printf("O - get play status\n"); 946 printf("j - get now playing info\n"); 947 printf("k - play\n"); 948 printf("K - stop\n"); 949 printf("L - pause\n"); 950 printf("u - start fast forward\n"); 951 printf("U - stop fast forward\n"); 952 printf("n - start rewind\n"); 953 printf("N - stop rewind\n"); 954 printf("i - forward\n"); 955 printf("I - backward\n"); 956 printf("M - mute\n"); 957 printf("r - skip\n"); 958 printf("q - query repeat and shuffle mode\n"); 959 printf("v - repeat single track\n"); 960 printf("x - repeat all tracks\n"); 961 printf("X - disable repeat mode\n"); 962 printf("z - shuffle all tracks\n"); 963 printf("Z - disable shuffle mode\n"); 964 965 printf("a/A - register/deregister TRACK_CHANGED\n"); 966 printf("R/P - register/deregister PLAYBACK_POS_CHANGED\n"); 967 968 printf("\n--- Volume Control ---\n"); 969 printf("t - volume up for 10 percent\n"); 970 printf("T - volume down for 10 percent\n"); 971 972 printf("---\n"); 973 } 974 #endif 975 976 #ifdef HAVE_BTSTACK_STDIN 977 static void stdin_process(char cmd){ 978 uint8_t status = ERROR_CODE_SUCCESS; 979 uint8_t volume; 980 981 switch (cmd){ 982 case 'b': 983 status = a2dp_sink_establish_stream(device_addr, a2dp_local_seid, &a2dp_cid); 984 printf(" - Create AVDTP connection to addr %s, and local seid %d, expected cid 0x%02x.\n", bd_addr_to_str(device_addr), a2dp_local_seid, a2dp_cid); 985 break; 986 case 'B': 987 printf(" - AVDTP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 988 a2dp_sink_disconnect(a2dp_cid); 989 break; 990 case 'c': 991 printf(" - Create AVRCP connection to addr %s.\n", bd_addr_to_str(device_addr)); 992 status = avrcp_connect(device_addr, &avrcp_cid); 993 break; 994 case 'C': 995 printf(" - AVRCP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 996 status = avrcp_disconnect(avrcp_cid); 997 break; 998 999 case '\n': 1000 case '\r': 1001 break; 1002 case 'w': 1003 printf("Send delay report\n"); 1004 avdtp_sink_delay_report(a2dp_cid, a2dp_local_seid, 100); 1005 break; 1006 // Volume Control 1007 case 't': 1008 volume_percentage = volume_percentage <= 90 ? volume_percentage + 10 : 100; 1009 volume = volume_percentage * 127 / 100; 1010 printf(" - volume up for 10 percent, %d%% (%d) \n", volume_percentage, volume); 1011 status = avrcp_target_volume_changed(avrcp_cid, volume); 1012 avrcp_volume_changed(volume); 1013 break; 1014 case 'T': 1015 volume_percentage = volume_percentage >= 10 ? volume_percentage - 10 : 0; 1016 volume = volume_percentage * 127 / 100; 1017 printf(" - volume down for 10 percent, %d%% (%d) \n", volume_percentage, volume); 1018 status = avrcp_target_volume_changed(avrcp_cid, volume); 1019 avrcp_volume_changed(volume); 1020 break; 1021 1022 case 'O': 1023 printf(" - get play status\n"); 1024 status = avrcp_controller_get_play_status(avrcp_cid); 1025 break; 1026 case 'j': 1027 printf(" - get now playing info\n"); 1028 status = avrcp_controller_get_now_playing_info(avrcp_cid); 1029 break; 1030 case 'k': 1031 printf(" - play\n"); 1032 status = avrcp_controller_play(avrcp_cid); 1033 break; 1034 case 'K': 1035 printf(" - stop\n"); 1036 status = avrcp_controller_stop(avrcp_cid); 1037 break; 1038 case 'L': 1039 printf(" - pause\n"); 1040 status = avrcp_controller_pause(avrcp_cid); 1041 break; 1042 case 'u': 1043 printf(" - start fast forward\n"); 1044 status = avrcp_controller_press_and_hold_fast_forward(avrcp_cid); 1045 break; 1046 case 'U': 1047 printf(" - stop fast forward\n"); 1048 status = avrcp_controller_release_press_and_hold_cmd(avrcp_cid); 1049 break; 1050 case 'n': 1051 printf(" - start rewind\n"); 1052 status = avrcp_controller_press_and_hold_rewind(avrcp_cid); 1053 break; 1054 case 'N': 1055 printf(" - stop rewind\n"); 1056 status = avrcp_controller_release_press_and_hold_cmd(avrcp_cid); 1057 break; 1058 case 'i': 1059 printf(" - forward\n"); 1060 status = avrcp_controller_forward(avrcp_cid); 1061 break; 1062 case 'I': 1063 printf(" - backward\n"); 1064 status = avrcp_controller_backward(avrcp_cid); 1065 break; 1066 case 'M': 1067 printf(" - mute\n"); 1068 status = avrcp_controller_mute(avrcp_cid); 1069 break; 1070 case 'r': 1071 printf(" - skip\n"); 1072 status = avrcp_controller_skip(avrcp_cid); 1073 break; 1074 case 'q': 1075 printf(" - query repeat and shuffle mode\n"); 1076 status = avrcp_controller_query_shuffle_and_repeat_modes(avrcp_cid); 1077 break; 1078 case 'v': 1079 printf(" - repeat single track\n"); 1080 status = avrcp_controller_set_repeat_mode(avrcp_cid, AVRCP_REPEAT_MODE_SINGLE_TRACK); 1081 break; 1082 case 'x': 1083 printf(" - repeat all tracks\n"); 1084 status = avrcp_controller_set_repeat_mode(avrcp_cid, AVRCP_REPEAT_MODE_ALL_TRACKS); 1085 break; 1086 case 'X': 1087 printf(" - disable repeat mode\n"); 1088 status = avrcp_controller_set_repeat_mode(avrcp_cid, AVRCP_REPEAT_MODE_OFF); 1089 break; 1090 case 'z': 1091 printf(" - shuffle all tracks\n"); 1092 status = avrcp_controller_set_shuffle_mode(avrcp_cid, AVRCP_SHUFFLE_MODE_ALL_TRACKS); 1093 break; 1094 case 'Z': 1095 printf(" - disable shuffle mode\n"); 1096 status = avrcp_controller_set_shuffle_mode(avrcp_cid, AVRCP_SHUFFLE_MODE_OFF); 1097 break; 1098 case 'a': 1099 printf("AVRCP: enable notification TRACK_CHANGED\n"); 1100 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1101 break; 1102 case 'A': 1103 printf("AVRCP: disable notification TRACK_CHANGED\n"); 1104 avrcp_controller_disable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1105 break; 1106 case 'R': 1107 printf("AVRCP: enable notification PLAYBACK_POS_CHANGED\n"); 1108 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 1109 break; 1110 case 'P': 1111 printf("AVRCP: disable notification PLAYBACK_POS_CHANGED\n"); 1112 avrcp_controller_disable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 1113 break; 1114 1115 default: 1116 show_usage(); 1117 return; 1118 } 1119 if (status != ERROR_CODE_SUCCESS){ 1120 printf("Could not perform command, status 0x%02x\n", status); 1121 } 1122 } 1123 #endif 1124 1125 int btstack_main(int argc, const char * argv[]); 1126 int btstack_main(int argc, const char * argv[]){ 1127 UNUSED(argc); 1128 (void)argv; 1129 1130 a2dp_and_avrcp_setup(); 1131 1132 #ifdef HAVE_BTSTACK_STDIN 1133 // parse human readable Bluetooth address 1134 sscanf_bd_addr(device_addr_string, device_addr); 1135 btstack_stdin_setup(stdin_process); 1136 #endif 1137 1138 // turn on! 1139 printf("Starting BTstack ...\n"); 1140 hci_power_control(HCI_POWER_ON); 1141 return 0; 1142 } 1143 /* EXAMPLE_END */