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 = "a2dp_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; 134 135 int num_channels; 136 int sampling_frequency; 137 int block_length; 138 int subbands; 139 int min_bitpool_value; 140 int max_bitpool_value; 141 btstack_sbc_channel_mode_t channel_mode; 142 btstack_sbc_allocation_method_t allocation_method; 143 } media_codec_configuration_sbc_t; 144 145 static media_codec_configuration_sbc_t sbc_configuration; 146 static int volume_percentage = 0; 147 static avrcp_battery_status_t battery_status = AVRCP_BATTERY_STATUS_WARNING; 148 149 #ifdef SUPPORT_VOLUME_CHANGE_NOTIFICATION 150 static uint8_t events_num = 4; 151 static uint8_t events[] = { 152 AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED, 153 AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED, 154 AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED, 155 AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED 156 }; 157 #endif 158 159 static uint8_t companies_num = 1; 160 static uint8_t companies[] = { 161 0x00, 0x19, 0x58 //BT SIG registered CompanyID 162 }; 163 164 #ifdef HAVE_BTSTACK_STDIN 165 // pts: 166 static const char * device_addr_string = "6C:72:E7:10:22:EE"; 167 // mac 2013: static const char * device_addr_string = "84:38:35:65:d1:15"; 168 // iPhone 5S: static const char * device_addr_string = "54:E4:3A:26:A2:39"; 169 static bd_addr_t device_addr; 170 #endif 171 172 static btstack_packet_callback_registration_t hci_event_callback_registration; 173 174 static uint8_t sdp_avdtp_sink_service_buffer[150]; 175 static uint8_t sdp_avrcp_target_service_buffer[150]; 176 static uint8_t sdp_avrcp_controller_service_buffer[200]; 177 static uint8_t device_id_sdp_service_buffer[100]; 178 179 static uint16_t a2dp_cid = 0; 180 static uint8_t a2dp_local_seid = 0; 181 182 static uint16_t avrcp_cid = 0; 183 static uint8_t avrcp_connected = 0; 184 static uint8_t avrcp_subevent_value[255]; 185 186 static uint8_t media_sbc_codec_capabilities[] = { 187 0xFF,//(AVDTP_SBC_44100 << 4) | AVDTP_SBC_STEREO, 188 0xFF,//(AVDTP_SBC_BLOCK_LENGTH_16 << 4) | (AVDTP_SBC_SUBBANDS_8 << 2) | AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS, 189 2, 53 190 }; 191 192 static uint8_t media_sbc_codec_configuration[4]; 193 194 static int media_initialized = 0; 195 static btstack_resample_t resample_instance; 196 197 /* @section Main Application Setup 198 * 199 * @text The Listing MainConfiguration shows how to setup AD2P Sink and AVRCP services. 200 * Besides calling init() method for each service, you'll also need to register several packet handlers: 201 * - hci_packet_handler - handles legacy pairing, here by using fixed '0000' pin code. 202 * - 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). 203 * - 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. 204 * - avrcp_packet_handler - receives connect/disconnect event. 205 * - avrcp_controller_packet_handler - receives answers for sent AVRCP commands. 206 * - avrcp_target_packet_handler - receives AVRCP commands, and registered notifications. 207 * - 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. 208 * 209 * @text To announce A2DP Sink and AVRCP services, you need to create corresponding 210 * SDP records and register them with the SDP service. 211 * 212 * @text Note, currently only the SBC codec is supported. 213 * If you want to store the audio data in a file, you'll need to define STORE_TO_WAV_FILE. 214 * 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. 215 * The initialization of the SBC decoder requires a callback that handles PCM data: 216 * - 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. 217 */ 218 219 /* LISTING_START(MainConfiguration): Setup Audio Sink and AVRCP services */ 220 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 221 static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size); 222 static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size); 223 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 224 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 225 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 226 #ifdef HAVE_BTSTACK_STDIN 227 static void stdin_process(char cmd); 228 #endif 229 230 static int a2dp_and_avrcp_setup(void){ 231 l2cap_init(); 232 // Initialize AVDTP Sink 233 a2dp_sink_init(); 234 a2dp_sink_register_packet_handler(&a2dp_sink_packet_handler); 235 a2dp_sink_register_media_handler(&handle_l2cap_media_data_packet); 236 237 // Create stream endpoint 238 avdtp_stream_endpoint_t * local_stream_endpoint = a2dp_sink_create_stream_endpoint(AVDTP_AUDIO, 239 AVDTP_CODEC_SBC, media_sbc_codec_capabilities, sizeof(media_sbc_codec_capabilities), 240 media_sbc_codec_configuration, sizeof(media_sbc_codec_configuration)); 241 if (!local_stream_endpoint){ 242 printf("A2DP Sink: not enough memory to create local stream endpoint\n"); 243 return 1; 244 } 245 246 // Store stream enpoint's SEP ID, as it is used by A2DP API to indentify the stream endpoint 247 a2dp_local_seid = avdtp_local_seid(local_stream_endpoint); 248 249 // Initialize AVRCP service 250 avrcp_init(); 251 avrcp_register_packet_handler(&avrcp_packet_handler); 252 253 // Initialize AVRCP Controller 254 avrcp_controller_init(); 255 avrcp_controller_register_packet_handler(&avrcp_controller_packet_handler); 256 257 // Initialize AVRCP Target 258 avrcp_target_init(); 259 avrcp_target_register_packet_handler(&avrcp_target_packet_handler); 260 261 // Initialize SDP 262 sdp_init(); 263 264 // Create A2DP Sink service record and register it with SDP 265 memset(sdp_avdtp_sink_service_buffer, 0, sizeof(sdp_avdtp_sink_service_buffer)); 266 a2dp_sink_create_sdp_record(sdp_avdtp_sink_service_buffer, 0x10001, AVDTP_SINK_FEATURE_MASK_HEADPHONE, NULL, NULL); 267 sdp_register_service(sdp_avdtp_sink_service_buffer); 268 269 // Create AVRCP Controller service record and register it with SDP. We send Category 1 commands to the media player, e.g. play/pause 270 memset(sdp_avrcp_controller_service_buffer, 0, sizeof(sdp_avrcp_controller_service_buffer)); 271 uint16_t controller_supported_features = AVRCP_FEATURE_MASK_CATEGORY_PLAYER_OR_RECORDER; 272 #ifdef AVRCP_BROWSING_ENABLED 273 controller_supported_features |= AVRCP_FEATURE_MASK_BROWSING; 274 #endif 275 avrcp_controller_create_sdp_record(sdp_avrcp_controller_service_buffer, 0x10002, controller_supported_features, NULL, NULL); 276 sdp_register_service(sdp_avrcp_controller_service_buffer); 277 278 // Create AVRCP Target service record and register it with SDP. We receive Category 2 commands from the media player, e.g. volume up/down 279 memset(sdp_avrcp_target_service_buffer, 0, sizeof(sdp_avrcp_target_service_buffer)); 280 uint16_t target_supported_features = AVRCP_FEATURE_MASK_CATEGORY_MONITOR_OR_AMPLIFIER; 281 avrcp_target_create_sdp_record(sdp_avrcp_target_service_buffer, 0x10003, target_supported_features, NULL, NULL); 282 sdp_register_service(sdp_avrcp_target_service_buffer); 283 284 // Create Device ID (PnP) service record and register it with SDP 285 memset(device_id_sdp_service_buffer, 0, sizeof(device_id_sdp_service_buffer)); 286 device_id_create_sdp_record(device_id_sdp_service_buffer, 0x10004, DEVICE_ID_VENDOR_ID_SOURCE_BLUETOOTH, BLUETOOTH_COMPANY_ID_BLUEKITCHEN_GMBH, 1, 1); 287 sdp_register_service(device_id_sdp_service_buffer); 288 289 // Set local name with a template Bluetooth address, that will be automatically 290 // replaced with a actual address once it is available, i.e. when BTstack boots 291 // up and starts talking to a Bluetooth module. 292 gap_set_local_name("A2DP Sink Demo 00:00:00:00:00:00"); 293 gap_discoverable_control(1); 294 gap_set_class_of_device(0x200408); 295 296 // Register for HCI events 297 hci_event_callback_registration.callback = &hci_packet_handler; 298 hci_add_event_handler(&hci_event_callback_registration); 299 300 #ifdef HAVE_POSIX_FILE_IO 301 if (!btstack_audio_sink_get_instance()){ 302 printf("No audio playback.\n"); 303 } else { 304 printf("Audio playback supported.\n"); 305 } 306 #ifdef STORE_TO_WAV_FILE 307 printf("Audio will be stored to \'%s\' file.\n", wav_filename); 308 #endif 309 #endif 310 return 0; 311 } 312 /* LISTING_END */ 313 314 static void playback_handler(int16_t * buffer, uint16_t num_audio_frames){ 315 316 #ifdef STORE_TO_WAV_FILE 317 int wav_samples = num_audio_frames * NUM_CHANNELS; 318 int16_t * wav_buffer = buffer; 319 #endif 320 321 // called from lower-layer but guaranteed to be on main thread 322 if (sbc_frame_size == 0){ 323 memset(buffer, 0, num_audio_frames * BYTES_PER_FRAME); 324 return; 325 } 326 327 // first fill from resampled audio 328 uint32_t bytes_read; 329 btstack_ring_buffer_read(&decoded_audio_ring_buffer, (uint8_t *) buffer, num_audio_frames * BYTES_PER_FRAME, &bytes_read); 330 buffer += bytes_read / NUM_CHANNELS; 331 num_audio_frames -= bytes_read / BYTES_PER_FRAME; 332 333 // then start decoding sbc frames using request_* globals 334 request_buffer = buffer; 335 request_frames = num_audio_frames; 336 while (request_frames && btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) >= sbc_frame_size){ 337 // decode frame 338 uint8_t sbc_frame[MAX_SBC_FRAME_SIZE]; 339 btstack_ring_buffer_read(&sbc_frame_ring_buffer, sbc_frame, sbc_frame_size, &bytes_read); 340 btstack_sbc_decoder_process_data(&state, 0, sbc_frame, sbc_frame_size); 341 } 342 343 #ifdef STORE_TO_WAV_FILE 344 audio_frame_count += num_audio_frames; 345 wav_writer_write_int16(wav_samples, wav_buffer); 346 #endif 347 } 348 349 static void handle_pcm_data(int16_t * data, int num_audio_frames, int num_channels, int sample_rate, void * context){ 350 UNUSED(sample_rate); 351 UNUSED(context); 352 UNUSED(num_channels); // must be stereo == 2 353 354 const btstack_audio_sink_t * audio_sink = btstack_audio_sink_get_instance(); 355 if (!audio_sink){ 356 #ifdef STORE_TO_WAV_FILE 357 audio_frame_count += num_audio_frames; 358 wav_writer_write_int16(num_audio_frames * NUM_CHANNELS, data); 359 #endif 360 return; 361 } 362 363 // resample into request buffer - add some additional space for resampling 364 int16_t output_buffer[(128+16) * NUM_CHANNELS]; // 16 * 8 * 2 365 uint32_t resampled_frames = btstack_resample_block(&resample_instance, data, num_audio_frames, output_buffer); 366 367 // store data in btstack_audio buffer first 368 int frames_to_copy = btstack_min(resampled_frames, request_frames); 369 memcpy(request_buffer, output_buffer, frames_to_copy * BYTES_PER_FRAME); 370 request_frames -= frames_to_copy; 371 request_buffer += frames_to_copy * NUM_CHANNELS; 372 373 // and rest in ring buffer 374 int frames_to_store = resampled_frames - frames_to_copy; 375 if (frames_to_store){ 376 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); 377 if (status){ 378 printf("Error storing samples in PCM ring buffer!!!\n"); 379 } 380 } 381 } 382 383 static int media_processing_init(media_codec_configuration_sbc_t configuration){ 384 if (media_initialized) return 0; 385 386 btstack_sbc_decoder_init(&state, mode, handle_pcm_data, NULL); 387 388 #ifdef STORE_TO_WAV_FILE 389 wav_writer_open(wav_filename, configuration.num_channels, configuration.sampling_frequency); 390 #endif 391 392 #ifdef STORE_TO_SBC_FILE 393 sbc_file = fopen(sbc_filename, "wb"); 394 #endif 395 396 btstack_ring_buffer_init(&sbc_frame_ring_buffer, sbc_frame_storage, sizeof(sbc_frame_storage)); 397 btstack_ring_buffer_init(&decoded_audio_ring_buffer, decoded_audio_storage, sizeof(decoded_audio_storage)); 398 btstack_resample_init(&resample_instance, configuration.num_channels); 399 400 // setup audio playback 401 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 402 if (audio){ 403 audio->init(NUM_CHANNELS, configuration.sampling_frequency, &playback_handler); 404 } 405 406 audio_stream_started = 0; 407 media_initialized = 1; 408 return 0; 409 } 410 411 static void media_processing_start(void){ 412 if (!media_initialized) return; 413 // setup audio playback 414 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 415 if (audio){ 416 audio->start_stream(); 417 } 418 audio_stream_started = 1; 419 } 420 421 static void media_processing_pause(void){ 422 if (!media_initialized) return; 423 // stop audio playback 424 audio_stream_started = 0; 425 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 426 if (audio){ 427 audio->stop_stream(); 428 } 429 } 430 431 static void media_processing_close(void){ 432 if (!media_initialized) return; 433 media_initialized = 0; 434 audio_stream_started = 0; 435 sbc_frame_size = 0; 436 437 #ifdef STORE_TO_WAV_FILE 438 wav_writer_close(); 439 uint32_t total_frames_nr = state.good_frames_nr + state.bad_frames_nr + state.zero_frames_nr; 440 441 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); 442 printf("WAV Writer: Wrote %u audio frames to wav file: %s\n", audio_frame_count, wav_filename); 443 #endif 444 445 #ifdef STORE_TO_SBC_FILE 446 fclose(sbc_file); 447 #endif 448 449 // stop audio playback 450 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 451 if (audio){ 452 printf("close stream\n"); 453 audio->close(); 454 } 455 } 456 457 /* @section Handle Media Data Packet 458 * 459 * @text Here the audio data, are received through the handle_l2cap_media_data_packet callback. 460 * Currently, only the SBC media codec is supported. Hence, the media data consists of the media packet header and the SBC packet. 461 * 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). 462 * If the audio stream wasn't started already and there are enough SBC frames in the ring buffer, start playback. 463 */ 464 465 static int read_media_data_header(uint8_t * packet, int size, int * offset, avdtp_media_packet_header_t * media_header); 466 static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header); 467 468 static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size){ 469 UNUSED(seid); 470 int pos = 0; 471 472 avdtp_media_packet_header_t media_header; 473 if (!read_media_data_header(packet, size, &pos, &media_header)) return; 474 475 avdtp_sbc_codec_header_t sbc_header; 476 if (!read_sbc_header(packet, size, &pos, &sbc_header)) return; 477 478 #ifdef STORE_TO_SBC_FILE 479 fwrite(packet+pos, size-pos, 1, sbc_file); 480 #endif 481 482 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 483 // process data right away if there's no audio implementation active, e.g. on posix systems to store as .wav 484 if (!audio){ 485 btstack_sbc_decoder_process_data(&state, 0, packet+pos, size-pos); 486 return; 487 } 488 489 // store sbc frame size for buffer management 490 sbc_frame_size = (size-pos)/ sbc_header.num_frames; 491 492 int status = btstack_ring_buffer_write(&sbc_frame_ring_buffer, packet+pos, size-pos); 493 if (status != ERROR_CODE_SUCCESS){ 494 printf("Error storing samples in SBC ring buffer!!!\n"); 495 } 496 497 // decide on audio sync drift based on number of sbc frames in queue 498 int sbc_frames_in_buffer = btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) / sbc_frame_size; 499 uint32_t resampling_factor; 500 501 // nomimal factor (fixed-point 2^16) and compensation offset 502 uint32_t nomimal_factor = 0x10000; 503 uint32_t compensation = 0x00100; 504 505 if (sbc_frames_in_buffer < OPTIMAL_FRAMES_MIN){ 506 resampling_factor = nomimal_factor - compensation; // stretch samples 507 } else if (sbc_frames_in_buffer <= OPTIMAL_FRAMES_MAX){ 508 resampling_factor = nomimal_factor; // nothing to do 509 } else { 510 resampling_factor = nomimal_factor + compensation; // compress samples 511 } 512 513 btstack_resample_set_factor(&resample_instance, resampling_factor); 514 515 // start stream if enough frames buffered 516 if (!audio_stream_started && sbc_frames_in_buffer >= OPTIMAL_FRAMES_MIN){ 517 media_processing_start(); 518 } 519 } 520 521 static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header){ 522 int sbc_header_len = 12; // without crc 523 int pos = *offset; 524 525 if (size - pos < sbc_header_len){ 526 printf("Not enough data to read SBC header, expected %d, received %d\n", sbc_header_len, size-pos); 527 return 0; 528 } 529 530 sbc_header->fragmentation = get_bit16(packet[pos], 7); 531 sbc_header->starting_packet = get_bit16(packet[pos], 6); 532 sbc_header->last_packet = get_bit16(packet[pos], 5); 533 sbc_header->num_frames = packet[pos] & 0x0f; 534 pos++; 535 *offset = pos; 536 return 1; 537 } 538 539 static int read_media_data_header(uint8_t *packet, int size, int *offset, avdtp_media_packet_header_t *media_header){ 540 int media_header_len = 12; // without crc 541 int pos = *offset; 542 543 if (size - pos < media_header_len){ 544 printf("Not enough data to read media packet header, expected %d, received %d\n", media_header_len, size-pos); 545 return 0; 546 } 547 548 media_header->version = packet[pos] & 0x03; 549 media_header->padding = get_bit16(packet[pos],2); 550 media_header->extension = get_bit16(packet[pos],3); 551 media_header->csrc_count = (packet[pos] >> 4) & 0x0F; 552 pos++; 553 554 media_header->marker = get_bit16(packet[pos],0); 555 media_header->payload_type = (packet[pos] >> 1) & 0x7F; 556 pos++; 557 558 media_header->sequence_number = big_endian_read_16(packet, pos); 559 pos+=2; 560 561 media_header->timestamp = big_endian_read_32(packet, pos); 562 pos+=4; 563 564 media_header->synchronization_source = big_endian_read_32(packet, pos); 565 pos+=4; 566 *offset = pos; 567 return 1; 568 } 569 570 static void dump_sbc_configuration(media_codec_configuration_sbc_t configuration){ 571 printf(" - num_channels: %d\n", configuration.num_channels); 572 printf(" - sampling_frequency: %d\n", configuration.sampling_frequency); 573 printf(" - channel_mode: %d\n", configuration.channel_mode); 574 printf(" - block_length: %d\n", configuration.block_length); 575 printf(" - subbands: %d\n", configuration.subbands); 576 printf(" - allocation_method: %d\n", configuration.allocation_method); 577 printf(" - bitpool_value [%d, %d] \n", configuration.min_bitpool_value, configuration.max_bitpool_value); 578 printf("\n"); 579 } 580 581 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 582 UNUSED(channel); 583 UNUSED(size); 584 uint16_t local_cid; 585 uint8_t status = 0xFF; 586 bd_addr_t adress; 587 588 if (packet_type != HCI_EVENT_PACKET) return; 589 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 590 switch (packet[2]){ 591 case AVRCP_SUBEVENT_CONNECTION_ESTABLISHED: { 592 local_cid = avrcp_subevent_connection_established_get_avrcp_cid(packet); 593 status = avrcp_subevent_connection_established_get_status(packet); 594 if (status != ERROR_CODE_SUCCESS){ 595 printf("AVRCP: Connection failed: status 0x%02x\n", status); 596 avrcp_cid = 0; 597 return; 598 } 599 600 avrcp_cid = local_cid; 601 avrcp_connected = 1; 602 avrcp_subevent_connection_established_get_bd_addr(packet, adress); 603 printf("AVRCP: Connected to %s, cid 0x%02x\n", bd_addr_to_str(adress), avrcp_cid); 604 605 // automatically enable notifications 606 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED); 607 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED); 608 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 609 return; 610 } 611 612 case AVRCP_SUBEVENT_CONNECTION_RELEASED: 613 printf("AVRCP: Channel released: cid 0x%02x\n", avrcp_subevent_connection_released_get_avrcp_cid(packet)); 614 avrcp_cid = 0; 615 avrcp_connected = 0; 616 return; 617 default: 618 break; 619 } 620 } 621 622 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 623 UNUSED(channel); 624 UNUSED(size); 625 uint8_t status = 0xFF; 626 627 if (packet_type != HCI_EVENT_PACKET) return; 628 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 629 630 status = packet[5]; 631 if (!avrcp_cid) return; 632 633 // ignore INTERIM status 634 if (status == AVRCP_CTYPE_RESPONSE_INTERIM){ 635 switch (packet[2]){ 636 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED:{ 637 uint32_t playback_position_ms = avrcp_subevent_notification_playback_pos_changed_get_playback_position_ms(packet); 638 if (playback_position_ms == AVRCP_NO_TRACK_SELECTED_PLAYBACK_POSITION_CHANGED){ 639 printf("AVRCP Controller: playback position changed, no track is selected\n"); 640 } 641 break; 642 } 643 default: 644 break; 645 } 646 return; 647 } 648 649 memset(avrcp_subevent_value, 0, sizeof(avrcp_subevent_value)); 650 switch (packet[2]){ 651 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED: 652 printf("AVRCP Controller: Playback position changed, position %d ms\n", (unsigned int) avrcp_subevent_notification_playback_pos_changed_get_playback_position_ms(packet)); 653 break; 654 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_STATUS_CHANGED: 655 printf("AVRCP Controller: Playback status changed %s\n", avrcp_play_status2str(avrcp_subevent_notification_playback_status_changed_get_play_status(packet))); 656 return; 657 case AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED: 658 printf("AVRCP Controller: Playing content changed\n"); 659 return; 660 case AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED: 661 printf("AVRCP Controller: Track changed\n"); 662 return; 663 case AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED: 664 printf("AVRCP Controller: Changed\n"); 665 return; 666 case AVRCP_SUBEVENT_SHUFFLE_AND_REPEAT_MODE:{ 667 uint8_t shuffle_mode = avrcp_subevent_shuffle_and_repeat_mode_get_shuffle_mode(packet); 668 uint8_t repeat_mode = avrcp_subevent_shuffle_and_repeat_mode_get_repeat_mode(packet); 669 printf("AVRCP Controller: %s, %s\n", avrcp_shuffle2str(shuffle_mode), avrcp_repeat2str(repeat_mode)); 670 break; 671 } 672 case AVRCP_SUBEVENT_NOW_PLAYING_TRACK_INFO: 673 printf("AVRCP Controller: Track: %d\n", avrcp_subevent_now_playing_track_info_get_track(packet)); 674 break; 675 676 case AVRCP_SUBEVENT_NOW_PLAYING_TOTAL_TRACKS_INFO: 677 printf("AVRCP Controller: Total Tracks: %d\n", avrcp_subevent_now_playing_total_tracks_info_get_total_tracks(packet)); 678 break; 679 680 case AVRCP_SUBEVENT_NOW_PLAYING_TITLE_INFO: 681 if (avrcp_subevent_now_playing_title_info_get_value_len(packet) > 0){ 682 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_title_info_get_value(packet), avrcp_subevent_now_playing_title_info_get_value_len(packet)); 683 printf("AVRCP Controller: Title: %s\n", avrcp_subevent_value); 684 } 685 break; 686 687 case AVRCP_SUBEVENT_NOW_PLAYING_ARTIST_INFO: 688 if (avrcp_subevent_now_playing_artist_info_get_value_len(packet) > 0){ 689 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_artist_info_get_value(packet), avrcp_subevent_now_playing_artist_info_get_value_len(packet)); 690 printf("AVRCP Controller: Artist: %s\n", avrcp_subevent_value); 691 } 692 break; 693 694 case AVRCP_SUBEVENT_NOW_PLAYING_ALBUM_INFO: 695 if (avrcp_subevent_now_playing_album_info_get_value_len(packet) > 0){ 696 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_album_info_get_value(packet), avrcp_subevent_now_playing_album_info_get_value_len(packet)); 697 printf("AVRCP Controller: Album: %s\n", avrcp_subevent_value); 698 } 699 break; 700 701 case AVRCP_SUBEVENT_NOW_PLAYING_GENRE_INFO: 702 if (avrcp_subevent_now_playing_genre_info_get_value_len(packet) > 0){ 703 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_genre_info_get_value(packet), avrcp_subevent_now_playing_genre_info_get_value_len(packet)); 704 printf("AVRCP Controller: Genre: %s\n", avrcp_subevent_value); 705 } 706 break; 707 708 case AVRCP_SUBEVENT_PLAY_STATUS: 709 printf("AVRCP Controller: Song length %"PRIu32" ms, Song position %"PRIu32" ms, Play status %s\n", 710 avrcp_subevent_play_status_get_song_length(packet), 711 avrcp_subevent_play_status_get_song_position(packet), 712 avrcp_play_status2str(avrcp_subevent_play_status_get_play_status(packet))); 713 break; 714 715 case AVRCP_SUBEVENT_OPERATION_COMPLETE: 716 printf("AVRCP Controller: %s complete\n", avrcp_operation2str(avrcp_subevent_operation_complete_get_operation_id(packet))); 717 break; 718 719 case AVRCP_SUBEVENT_OPERATION_START: 720 printf("AVRCP Controller: %s start\n", avrcp_operation2str(avrcp_subevent_operation_start_get_operation_id(packet))); 721 break; 722 723 case AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_END: 724 printf("AVRCP Controller: Track reached end\n"); 725 break; 726 727 case AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE: 728 printf("AVRCP Controller: Set Player App Value %s\n", avrcp_ctype2str(avrcp_subevent_player_application_value_response_get_command_type(packet))); 729 break; 730 731 732 default: 733 printf("AVRCP Controller: Event 0x%02x is not parsed\n", packet[2]); 734 break; 735 } 736 } 737 738 static void avrcp_volume_changed(uint8_t volume){ 739 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 740 if (audio){ 741 audio->set_volume(volume); 742 } 743 } 744 745 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 746 UNUSED(channel); 747 UNUSED(size); 748 749 if (packet_type != HCI_EVENT_PACKET) return; 750 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 751 752 uint8_t volume; 753 char const * button_state; 754 avrcp_operation_id_t operation_id; 755 756 switch (packet[2]){ 757 case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED: 758 volume = avrcp_subevent_notification_volume_changed_get_absolute_volume(packet); 759 volume_percentage = volume * 100 / 127; 760 printf("AVRCP Target : Volume set to %d%% (%d)\n", volume_percentage, volume); 761 avrcp_volume_changed(volume); 762 break; 763 764 case AVRCP_SUBEVENT_EVENT_IDS_QUERY: 765 #ifdef SUPPORT_VOLUME_CHANGE_NOTIFICATION 766 avrcp_target_supported_events(avrcp_cid, events_num, events, sizeof(events)); 767 #else 768 avrcp_target_supported_events(avrcp_cid, 0, NULL, 0); 769 #endif 770 break; 771 case AVRCP_SUBEVENT_COMPANY_IDS_QUERY: 772 avrcp_target_supported_companies(avrcp_cid, companies_num, companies, sizeof(companies)); 773 break; 774 case AVRCP_SUBEVENT_OPERATION: 775 operation_id = avrcp_subevent_operation_get_operation_id(packet); 776 button_state = avrcp_subevent_operation_get_button_pressed(packet) > 0 ? "PRESS" : "RELEASE"; 777 switch (operation_id){ 778 case AVRCP_OPERATION_ID_VOLUME_UP: 779 printf("AVRCP Target : VOLUME UP (%s)\n", button_state); 780 break; 781 case AVRCP_OPERATION_ID_VOLUME_DOWN: 782 printf("AVRCP Target : VOLUME UP (%s)\n", button_state); 783 break; 784 default: 785 return; 786 } 787 break; 788 default: 789 printf("AVRCP Target : Event 0x%02x is not parsed\n", packet[2]); 790 break; 791 } 792 } 793 794 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 795 UNUSED(channel); 796 UNUSED(size); 797 if (packet_type != HCI_EVENT_PACKET) return; 798 if (hci_event_packet_get_type(packet) == HCI_EVENT_PIN_CODE_REQUEST) { 799 bd_addr_t address; 800 printf("Pin code request - using '0000'\n"); 801 hci_event_pin_code_request_get_bd_addr(packet, address); 802 gap_pin_code_response(address, "0000"); 803 } 804 } 805 806 static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 807 UNUSED(channel); 808 UNUSED(size); 809 bd_addr_t address; 810 uint8_t status; 811 812 uint8_t allocation_method; 813 814 if (packet_type != HCI_EVENT_PACKET) return; 815 if (hci_event_packet_get_type(packet) != HCI_EVENT_A2DP_META) return; 816 817 switch (packet[2]){ 818 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 819 printf("A2DP Sink : Received non SBC codec - not implemented\n"); 820 break; 821 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 822 printf("A2DP Sink : Received SBC codec configuration\n"); 823 sbc_configuration.reconfigure = a2dp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 824 sbc_configuration.num_channels = a2dp_subevent_signaling_media_codec_sbc_configuration_get_num_channels(packet); 825 sbc_configuration.sampling_frequency = a2dp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 826 sbc_configuration.block_length = a2dp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 827 sbc_configuration.subbands = a2dp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 828 sbc_configuration.min_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 829 sbc_configuration.max_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 830 831 allocation_method = a2dp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 832 833 // Adapt Bluetooth spec definition to SBC Encoder expected input 834 sbc_configuration.allocation_method = (btstack_sbc_allocation_method_t)(allocation_method - 1); 835 836 switch (a2dp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet)){ 837 case AVDTP_CHANNEL_MODE_JOINT_STEREO: 838 sbc_configuration.channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO; 839 break; 840 case AVDTP_CHANNEL_MODE_STEREO: 841 sbc_configuration.channel_mode = SBC_CHANNEL_MODE_STEREO; 842 break; 843 case AVDTP_CHANNEL_MODE_DUAL_CHANNEL: 844 sbc_configuration.channel_mode = SBC_CHANNEL_MODE_DUAL_CHANNEL; 845 break; 846 case AVDTP_CHANNEL_MODE_MONO: 847 sbc_configuration.channel_mode = SBC_CHANNEL_MODE_MONO; 848 break; 849 default: 850 btstack_assert(false); 851 break; 852 } 853 dump_sbc_configuration(sbc_configuration); 854 855 if (sbc_configuration.reconfigure){ 856 media_processing_close(); 857 } 858 // prepare media processing 859 media_processing_init(sbc_configuration); 860 break; 861 } 862 case A2DP_SUBEVENT_STREAM_ESTABLISHED: 863 a2dp_subevent_stream_established_get_bd_addr(packet, address); 864 status = a2dp_subevent_stream_established_get_status(packet); 865 if (status != ERROR_CODE_SUCCESS){ 866 printf("A2DP Sink : Streaming connection failed, status 0x%02x\n", status); 867 break; 868 } 869 870 a2dp_cid = a2dp_subevent_stream_established_get_a2dp_cid(packet); 871 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); 872 #ifdef HAVE_BTSTACK_STDIN 873 // use address for outgoing connections 874 memcpy(device_addr, address, 6); 875 #endif 876 break; 877 878 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 879 case A2DP_SUBEVENT_START_STREAM_REQUESTED: 880 printf("A2DP Sink : Explicit Accept to start stream, local_seid 0x%02x\n", a2dp_subevent_start_stream_requested_get_local_seid(packet)); 881 a2dp_sink_start_stream_accept(a2dp_cid, a2dp_local_seid); 882 break; 883 #endif 884 case A2DP_SUBEVENT_STREAM_STARTED: 885 printf("A2DP Sink : Stream started\n"); 886 // audio stream is started when buffer reaches minimal level 887 break; 888 889 case A2DP_SUBEVENT_STREAM_SUSPENDED: 890 printf("A2DP Sink : Stream paused\n"); 891 media_processing_pause(); 892 break; 893 894 case A2DP_SUBEVENT_STREAM_RELEASED: 895 printf("A2DP Sink : Stream released\n"); 896 media_processing_close(); 897 break; 898 899 case A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 900 printf("A2DP Sink : Signaling connection released\n"); 901 media_processing_close(); 902 break; 903 904 default: 905 printf("A2DP Sink : Not parsed 0x%02x\n", packet[2]); 906 break; 907 } 908 } 909 910 #ifdef HAVE_BTSTACK_STDIN 911 static void show_usage(void){ 912 bd_addr_t iut_address; 913 gap_local_bd_addr(iut_address); 914 printf("\n--- Bluetooth AVDTP Sink/AVRCP Connection Test Console %s ---\n", bd_addr_to_str(iut_address)); 915 printf("b - AVDTP Sink create connection to addr %s\n", bd_addr_to_str(device_addr)); 916 printf("B - AVDTP Sink disconnect\n"); 917 printf("c - AVRCP create connection to addr %s\n", bd_addr_to_str(device_addr)); 918 printf("C - AVRCP disconnect\n"); 919 920 printf("w - delay report\n"); 921 922 printf("\n--- Bluetooth AVRCP Commands %s ---\n", bd_addr_to_str(iut_address)); 923 printf("O - get play status\n"); 924 printf("j - get now playing info\n"); 925 printf("k - play\n"); 926 printf("K - stop\n"); 927 printf("L - pause\n"); 928 printf("u - start fast forward\n"); 929 printf("U - stop fast forward\n"); 930 printf("n - start rewind\n"); 931 printf("N - stop rewind\n"); 932 printf("i - forward\n"); 933 printf("I - backward\n"); 934 printf("M - mute\n"); 935 printf("r - skip\n"); 936 printf("q - query repeat and shuffle mode\n"); 937 printf("v - repeat single track\n"); 938 printf("x - repeat all tracks\n"); 939 printf("X - disable repeat mode\n"); 940 printf("z - shuffle all tracks\n"); 941 printf("Z - disable shuffle mode\n"); 942 943 printf("a/A - register/deregister TRACK_CHANGED\n"); 944 printf("R/P - register/deregister PLAYBACK_POS_CHANGED\n"); 945 946 printf("s/S - send/release long button press REWIND\n"); 947 948 printf("\n--- Volume and Battery Control ---\n"); 949 printf("t - volume up for 10 percent\n"); 950 printf("T - volume down for 10 percent\n"); 951 printf("V - toggle Battery status from AVRCP_BATTERY_STATUS_NORMAL to AVRCP_BATTERY_STATUS_FULL_CHARGE\n"); 952 printf("---\n"); 953 } 954 #endif 955 956 #ifdef HAVE_BTSTACK_STDIN 957 static void stdin_process(char cmd){ 958 uint8_t status = ERROR_CODE_SUCCESS; 959 uint8_t volume; 960 961 switch (cmd){ 962 case 'b': 963 status = a2dp_sink_establish_stream(device_addr, a2dp_local_seid, &a2dp_cid); 964 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); 965 break; 966 case 'B': 967 printf(" - AVDTP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 968 a2dp_sink_disconnect(a2dp_cid); 969 break; 970 case 'c': 971 printf(" - Create AVRCP connection to addr %s.\n", bd_addr_to_str(device_addr)); 972 status = avrcp_connect(device_addr, &avrcp_cid); 973 break; 974 case 'C': 975 printf(" - AVRCP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 976 status = avrcp_disconnect(avrcp_cid); 977 break; 978 979 case '\n': 980 case '\r': 981 break; 982 case 'w': 983 printf("Send delay report\n"); 984 avdtp_sink_delay_report(a2dp_cid, a2dp_local_seid, 100); 985 break; 986 // Volume Control 987 case 't': 988 volume_percentage = volume_percentage <= 90 ? volume_percentage + 10 : 100; 989 volume = volume_percentage * 127 / 100; 990 printf(" - volume up for 10 percent, %d%% (%d) \n", volume_percentage, volume); 991 status = avrcp_target_volume_changed(avrcp_cid, volume); 992 avrcp_volume_changed(volume); 993 break; 994 case 'T': 995 volume_percentage = volume_percentage >= 10 ? volume_percentage - 10 : 0; 996 volume = volume_percentage * 127 / 100; 997 printf(" - volume down for 10 percent, %d%% (%d) \n", volume_percentage, volume); 998 status = avrcp_target_volume_changed(avrcp_cid, volume); 999 avrcp_volume_changed(volume); 1000 break; 1001 case 'V': 1002 if (battery_status < AVRCP_BATTERY_STATUS_FULL_CHARGE){ 1003 battery_status = (avrcp_battery_status_t)((uint8_t) battery_status + 1); 1004 } else { 1005 battery_status = AVRCP_BATTERY_STATUS_NORMAL; 1006 } 1007 status = avrcp_target_battery_status_changed(avrcp_cid, battery_status); 1008 break; 1009 case 'O': 1010 printf(" - get play status\n"); 1011 status = avrcp_controller_get_play_status(avrcp_cid); 1012 break; 1013 case 'j': 1014 printf(" - get now playing info\n"); 1015 status = avrcp_controller_get_now_playing_info(avrcp_cid); 1016 break; 1017 case 'k': 1018 printf(" - play\n"); 1019 status = avrcp_controller_play(avrcp_cid); 1020 break; 1021 case 'K': 1022 printf(" - stop\n"); 1023 status = avrcp_controller_stop(avrcp_cid); 1024 break; 1025 case 'L': 1026 printf(" - pause\n"); 1027 status = avrcp_controller_pause(avrcp_cid); 1028 break; 1029 case 'u': 1030 printf(" - start fast forward\n"); 1031 status = avrcp_controller_press_and_hold_fast_forward(avrcp_cid); 1032 break; 1033 case 'U': 1034 printf(" - stop fast forward\n"); 1035 status = avrcp_controller_release_press_and_hold_cmd(avrcp_cid); 1036 break; 1037 case 'n': 1038 printf(" - start rewind\n"); 1039 status = avrcp_controller_press_and_hold_rewind(avrcp_cid); 1040 break; 1041 case 'N': 1042 printf(" - stop rewind\n"); 1043 status = avrcp_controller_release_press_and_hold_cmd(avrcp_cid); 1044 break; 1045 case 'i': 1046 printf(" - forward\n"); 1047 status = avrcp_controller_forward(avrcp_cid); 1048 break; 1049 case 'I': 1050 printf(" - backward\n"); 1051 status = avrcp_controller_backward(avrcp_cid); 1052 break; 1053 case 'M': 1054 printf(" - mute\n"); 1055 status = avrcp_controller_mute(avrcp_cid); 1056 break; 1057 case 'r': 1058 printf(" - skip\n"); 1059 status = avrcp_controller_skip(avrcp_cid); 1060 break; 1061 case 'q': 1062 printf(" - query repeat and shuffle mode\n"); 1063 status = avrcp_controller_query_shuffle_and_repeat_modes(avrcp_cid); 1064 break; 1065 case 'v': 1066 printf(" - repeat single track\n"); 1067 status = avrcp_controller_set_repeat_mode(avrcp_cid, AVRCP_REPEAT_MODE_SINGLE_TRACK); 1068 break; 1069 case 'x': 1070 printf(" - repeat all tracks\n"); 1071 status = avrcp_controller_set_repeat_mode(avrcp_cid, AVRCP_REPEAT_MODE_ALL_TRACKS); 1072 break; 1073 case 'X': 1074 printf(" - disable repeat mode\n"); 1075 status = avrcp_controller_set_repeat_mode(avrcp_cid, AVRCP_REPEAT_MODE_OFF); 1076 break; 1077 case 'z': 1078 printf(" - shuffle all tracks\n"); 1079 status = avrcp_controller_set_shuffle_mode(avrcp_cid, AVRCP_SHUFFLE_MODE_ALL_TRACKS); 1080 break; 1081 case 'Z': 1082 printf(" - disable shuffle mode\n"); 1083 status = avrcp_controller_set_shuffle_mode(avrcp_cid, AVRCP_SHUFFLE_MODE_OFF); 1084 break; 1085 case 'a': 1086 printf("AVRCP: enable notification TRACK_CHANGED\n"); 1087 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1088 break; 1089 case 'A': 1090 printf("AVRCP: disable notification TRACK_CHANGED\n"); 1091 avrcp_controller_disable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1092 break; 1093 case 'R': 1094 printf("AVRCP: enable notification PLAYBACK_POS_CHANGED\n"); 1095 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 1096 break; 1097 case 'P': 1098 printf("AVRCP: disable notification PLAYBACK_POS_CHANGED\n"); 1099 avrcp_controller_disable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 1100 break; 1101 case 's': 1102 printf("AVRCP: send long button press REWIND\n"); 1103 avrcp_controller_start_press_and_hold_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND); 1104 break; 1105 case 'S': 1106 printf("AVRCP: release long button press REWIND\n"); 1107 avrcp_controller_release_press_and_hold_cmd(avrcp_cid); 1108 break; 1109 default: 1110 show_usage(); 1111 return; 1112 } 1113 if (status != ERROR_CODE_SUCCESS){ 1114 printf("Could not perform command, status 0x%02x\n", status); 1115 } 1116 } 1117 #endif 1118 1119 int btstack_main(int argc, const char * argv[]); 1120 int btstack_main(int argc, const char * argv[]){ 1121 UNUSED(argc); 1122 (void)argv; 1123 1124 a2dp_and_avrcp_setup(); 1125 1126 #ifdef HAVE_BTSTACK_STDIN 1127 // parse human readable Bluetooth address 1128 sscanf_bd_addr(device_addr_string, device_addr); 1129 btstack_stdin_setup(stdin_process); 1130 #endif 1131 1132 // turn on! 1133 printf("Starting BTstack ...\n"); 1134 hci_power_control(HCI_POWER_ON); 1135 return 0; 1136 } 1137 /* EXAMPLE_END */ 1138