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 BLUEKITCHEN 24 * GMBH 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 HAVE_BTSTACK_STDIN 150 // pts: 151 static const char * device_addr_string = "5C:F3:70:60:7B:87"; 152 // mac 2013: static const char * device_addr_string = "84:38:35:65:d1:15"; 153 // iPhone 5S: static const char * device_addr_string = "54:E4:3A:26:A2:39"; 154 static bd_addr_t device_addr; 155 #endif 156 157 static btstack_packet_callback_registration_t hci_event_callback_registration; 158 159 static uint8_t sdp_avdtp_sink_service_buffer[150]; 160 static uint8_t sdp_avrcp_target_service_buffer[150]; 161 static uint8_t sdp_avrcp_controller_service_buffer[200]; 162 static uint8_t device_id_sdp_service_buffer[100]; 163 164 static uint16_t a2dp_cid = 0; 165 static uint8_t a2dp_local_seid = 0; 166 167 static uint16_t avrcp_cid = 0; 168 static uint8_t avrcp_connected = 0; 169 static uint8_t avrcp_subevent_value[255]; 170 171 static uint8_t media_sbc_codec_capabilities[] = { 172 0xFF,//(AVDTP_SBC_44100 << 4) | AVDTP_SBC_STEREO, 173 0xFF,//(AVDTP_SBC_BLOCK_LENGTH_16 << 4) | (AVDTP_SBC_SUBBANDS_8 << 2) | AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS, 174 2, 53 175 }; 176 177 static uint8_t media_sbc_codec_configuration[4]; 178 179 static int media_initialized = 0; 180 static btstack_resample_t resample_instance; 181 182 /* @section Main Application Setup 183 * 184 * @text The Listing MainConfiguration shows how to setup AD2P Sink and AVRCP services. 185 * Besides calling init() method for each service, you'll also need to register several packet handlers: 186 * - hci_packet_handler - handles legacy pairing, here by using fixed '0000' pin code. 187 * - 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). 188 * - 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. 189 * - avrcp_packet_handler - receives connect/disconnect event. 190 * - avrcp_controller_packet_handler - receives answers for sent AVRCP commands. 191 * - avrcp_target_packet_handler - receives AVRCP commands, and registered notifications. 192 * - 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. 193 * 194 * @text To announce A2DP Sink and AVRCP services, you need to create corresponding 195 * SDP records and register them with the SDP service. 196 * 197 * @text Note, currently only the SBC codec is supported. 198 * If you want to store the audio data in a file, you'll need to define STORE_TO_WAV_FILE. 199 * 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. 200 * The initialization of the SBC decoder requires a callback that handles PCM data: 201 * - 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. 202 */ 203 204 /* LISTING_START(MainConfiguration): Setup Audio Sink and AVRCP services */ 205 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 206 static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size); 207 static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size); 208 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 209 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 210 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 211 #ifdef HAVE_BTSTACK_STDIN 212 static void stdin_process(char cmd); 213 #endif 214 215 static int a2dp_and_avrcp_setup(void){ 216 217 l2cap_init(); 218 219 #ifdef ENABLE_BLE 220 // Initialize LE Security Manager. Needed for cross-transport key derivation 221 sm_init(); 222 #endif 223 224 // Initialize AVDTP Sink 225 a2dp_sink_init(); 226 a2dp_sink_register_packet_handler(&a2dp_sink_packet_handler); 227 a2dp_sink_register_media_handler(&handle_l2cap_media_data_packet); 228 229 // Create stream endpoint 230 avdtp_stream_endpoint_t * local_stream_endpoint = a2dp_sink_create_stream_endpoint(AVDTP_AUDIO, 231 AVDTP_CODEC_SBC, media_sbc_codec_capabilities, sizeof(media_sbc_codec_capabilities), 232 media_sbc_codec_configuration, sizeof(media_sbc_codec_configuration)); 233 if (!local_stream_endpoint){ 234 printf("A2DP Sink: not enough memory to create local stream endpoint\n"); 235 return 1; 236 } 237 238 // Store stream enpoint's SEP ID, as it is used by A2DP API to indentify the stream endpoint 239 a2dp_local_seid = avdtp_local_seid(local_stream_endpoint); 240 241 // Initialize AVRCP service 242 avrcp_init(); 243 avrcp_register_packet_handler(&avrcp_packet_handler); 244 245 // Initialize AVRCP Controller 246 avrcp_controller_init(); 247 avrcp_controller_register_packet_handler(&avrcp_controller_packet_handler); 248 249 // Initialize AVRCP Target 250 avrcp_target_init(); 251 avrcp_target_register_packet_handler(&avrcp_target_packet_handler); 252 253 // Initialize SDP 254 sdp_init(); 255 256 // Create A2DP Sink service record and register it with SDP 257 memset(sdp_avdtp_sink_service_buffer, 0, sizeof(sdp_avdtp_sink_service_buffer)); 258 a2dp_sink_create_sdp_record(sdp_avdtp_sink_service_buffer, 0x10001, AVDTP_SINK_FEATURE_MASK_HEADPHONE, NULL, NULL); 259 sdp_register_service(sdp_avdtp_sink_service_buffer); 260 261 // Create AVRCP Controller service record and register it with SDP. We send Category 1 commands to the media player, e.g. play/pause 262 memset(sdp_avrcp_controller_service_buffer, 0, sizeof(sdp_avrcp_controller_service_buffer)); 263 uint16_t controller_supported_features = AVRCP_FEATURE_MASK_CATEGORY_PLAYER_OR_RECORDER; 264 #ifdef AVRCP_BROWSING_ENABLED 265 controller_supported_features |= AVRCP_FEATURE_MASK_BROWSING; 266 #endif 267 avrcp_controller_create_sdp_record(sdp_avrcp_controller_service_buffer, 0x10002, controller_supported_features, NULL, NULL); 268 sdp_register_service(sdp_avrcp_controller_service_buffer); 269 270 // Create AVRCP Target service record and register it with SDP. We receive Category 2 commands from the media player, e.g. volume up/down 271 memset(sdp_avrcp_target_service_buffer, 0, sizeof(sdp_avrcp_target_service_buffer)); 272 uint16_t target_supported_features = AVRCP_FEATURE_MASK_CATEGORY_MONITOR_OR_AMPLIFIER; 273 avrcp_target_create_sdp_record(sdp_avrcp_target_service_buffer, 0x10003, target_supported_features, NULL, NULL); 274 sdp_register_service(sdp_avrcp_target_service_buffer); 275 276 // Create Device ID (PnP) service record and register it with SDP 277 memset(device_id_sdp_service_buffer, 0, sizeof(device_id_sdp_service_buffer)); 278 device_id_create_sdp_record(device_id_sdp_service_buffer, 0x10004, DEVICE_ID_VENDOR_ID_SOURCE_BLUETOOTH, BLUETOOTH_COMPANY_ID_BLUEKITCHEN_GMBH, 1, 1); 279 sdp_register_service(device_id_sdp_service_buffer); 280 281 // Set local name with a template Bluetooth address, that will be automatically 282 // replaced with a actual address once it is available, i.e. when BTstack boots 283 // up and starts talking to a Bluetooth module. 284 gap_set_local_name("A2DP Sink Demo 00:00:00:00:00:00"); 285 286 // allot to show up in Bluetooth inquiry 287 gap_discoverable_control(1); 288 289 // Service Class: Audio, Major Device Class: Audio, Minor: Loudspeaker 290 gap_set_class_of_device(0x200414); 291 292 // allow for role switch in general and sniff mode 293 gap_set_default_link_policy_settings( LM_LINK_POLICY_ENABLE_ROLE_SWITCH | LM_LINK_POLICY_ENABLE_SNIFF_MODE ); 294 295 // allow for role switch on outgoing connections - this allows A2DP Source, e.g. smartphone, to become master when we re-connect to it 296 gap_set_allow_role_switch(true); 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(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 != ERROR_CODE_SUCCESS){ 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 media_processing_start(); 520 } 521 } 522 523 static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header){ 524 int sbc_header_len = 12; // without crc 525 int pos = *offset; 526 527 if (size - pos < sbc_header_len){ 528 printf("Not enough data to read SBC header, expected %d, received %d\n", sbc_header_len, size-pos); 529 return 0; 530 } 531 532 sbc_header->fragmentation = get_bit16(packet[pos], 7); 533 sbc_header->starting_packet = get_bit16(packet[pos], 6); 534 sbc_header->last_packet = get_bit16(packet[pos], 5); 535 sbc_header->num_frames = packet[pos] & 0x0f; 536 pos++; 537 *offset = pos; 538 return 1; 539 } 540 541 static int read_media_data_header(uint8_t *packet, int size, int *offset, avdtp_media_packet_header_t *media_header){ 542 int media_header_len = 12; // without crc 543 int pos = *offset; 544 545 if (size - pos < media_header_len){ 546 printf("Not enough data to read media packet header, expected %d, received %d\n", media_header_len, size-pos); 547 return 0; 548 } 549 550 media_header->version = packet[pos] & 0x03; 551 media_header->padding = get_bit16(packet[pos],2); 552 media_header->extension = get_bit16(packet[pos],3); 553 media_header->csrc_count = (packet[pos] >> 4) & 0x0F; 554 pos++; 555 556 media_header->marker = get_bit16(packet[pos],0); 557 media_header->payload_type = (packet[pos] >> 1) & 0x7F; 558 pos++; 559 560 media_header->sequence_number = big_endian_read_16(packet, pos); 561 pos+=2; 562 563 media_header->timestamp = big_endian_read_32(packet, pos); 564 pos+=4; 565 566 media_header->synchronization_source = big_endian_read_32(packet, pos); 567 pos+=4; 568 *offset = pos; 569 return 1; 570 } 571 572 static void dump_sbc_configuration(media_codec_configuration_sbc_t configuration){ 573 printf(" - num_channels: %d\n", configuration.num_channels); 574 printf(" - sampling_frequency: %d\n", configuration.sampling_frequency); 575 printf(" - channel_mode: %d\n", configuration.channel_mode); 576 printf(" - block_length: %d\n", configuration.block_length); 577 printf(" - subbands: %d\n", configuration.subbands); 578 printf(" - allocation_method: %d\n", configuration.allocation_method); 579 printf(" - bitpool_value [%d, %d] \n", configuration.min_bitpool_value, configuration.max_bitpool_value); 580 printf("\n"); 581 } 582 583 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 584 UNUSED(channel); 585 UNUSED(size); 586 uint16_t local_cid; 587 uint8_t status; 588 bd_addr_t address; 589 590 if (packet_type != HCI_EVENT_PACKET) return; 591 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 592 switch (packet[2]){ 593 case AVRCP_SUBEVENT_CONNECTION_ESTABLISHED: { 594 local_cid = avrcp_subevent_connection_established_get_avrcp_cid(packet); 595 status = avrcp_subevent_connection_established_get_status(packet); 596 if (status != ERROR_CODE_SUCCESS){ 597 printf("AVRCP: Connection failed: status 0x%02x\n", status); 598 avrcp_cid = 0; 599 return; 600 } 601 602 avrcp_cid = local_cid; 603 avrcp_connected = 1; 604 avrcp_subevent_connection_established_get_bd_addr(packet, address); 605 printf("AVRCP: Connected to %s, cid 0x%02x\n", bd_addr_to_str(address), avrcp_cid); 606 607 avrcp_target_support_event(avrcp_cid, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED); 608 avrcp_target_support_event(avrcp_cid, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED); 609 avrcp_target_battery_status_changed(avrcp_cid, battery_status); 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); 631 632 if (packet_type != HCI_EVENT_PACKET) return; 633 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 634 if (!avrcp_cid) return; 635 636 memset(avrcp_subevent_value, 0, sizeof(avrcp_subevent_value)); 637 switch (packet[2]){ 638 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED: 639 printf("AVRCP Controller: Playback position changed, position %d ms\n", (unsigned int) avrcp_subevent_notification_playback_pos_changed_get_playback_position_ms(packet)); 640 break; 641 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_STATUS_CHANGED: 642 printf("AVRCP Controller: Playback status changed %s\n", avrcp_play_status2str(avrcp_subevent_notification_playback_status_changed_get_play_status(packet))); 643 return; 644 case AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED: 645 printf("AVRCP Controller: Playing content changed\n"); 646 return; 647 case AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED: 648 printf("AVRCP Controller: Track changed\n"); 649 return; 650 case AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED: 651 printf("AVRCP Controller: Changed\n"); 652 return; 653 case AVRCP_SUBEVENT_SHUFFLE_AND_REPEAT_MODE:{ 654 uint8_t shuffle_mode = avrcp_subevent_shuffle_and_repeat_mode_get_shuffle_mode(packet); 655 uint8_t repeat_mode = avrcp_subevent_shuffle_and_repeat_mode_get_repeat_mode(packet); 656 printf("AVRCP Controller: %s, %s\n", avrcp_shuffle2str(shuffle_mode), avrcp_repeat2str(repeat_mode)); 657 break; 658 } 659 case AVRCP_SUBEVENT_NOW_PLAYING_TRACK_INFO: 660 printf("AVRCP Controller: Track: %d\n", avrcp_subevent_now_playing_track_info_get_track(packet)); 661 break; 662 663 case AVRCP_SUBEVENT_NOW_PLAYING_TOTAL_TRACKS_INFO: 664 printf("AVRCP Controller: Total Tracks: %d\n", avrcp_subevent_now_playing_total_tracks_info_get_total_tracks(packet)); 665 break; 666 667 case AVRCP_SUBEVENT_NOW_PLAYING_TITLE_INFO: 668 if (avrcp_subevent_now_playing_title_info_get_value_len(packet) > 0){ 669 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_title_info_get_value(packet), avrcp_subevent_now_playing_title_info_get_value_len(packet)); 670 printf("AVRCP Controller: Title: %s\n", avrcp_subevent_value); 671 } 672 break; 673 674 case AVRCP_SUBEVENT_NOW_PLAYING_ARTIST_INFO: 675 if (avrcp_subevent_now_playing_artist_info_get_value_len(packet) > 0){ 676 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_artist_info_get_value(packet), avrcp_subevent_now_playing_artist_info_get_value_len(packet)); 677 printf("AVRCP Controller: Artist: %s\n", avrcp_subevent_value); 678 } 679 break; 680 681 case AVRCP_SUBEVENT_NOW_PLAYING_ALBUM_INFO: 682 if (avrcp_subevent_now_playing_album_info_get_value_len(packet) > 0){ 683 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_album_info_get_value(packet), avrcp_subevent_now_playing_album_info_get_value_len(packet)); 684 printf("AVRCP Controller: Album: %s\n", avrcp_subevent_value); 685 } 686 break; 687 688 case AVRCP_SUBEVENT_NOW_PLAYING_GENRE_INFO: 689 if (avrcp_subevent_now_playing_genre_info_get_value_len(packet) > 0){ 690 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_genre_info_get_value(packet), avrcp_subevent_now_playing_genre_info_get_value_len(packet)); 691 printf("AVRCP Controller: Genre: %s\n", avrcp_subevent_value); 692 } 693 break; 694 695 case AVRCP_SUBEVENT_PLAY_STATUS: 696 printf("AVRCP Controller: Song length %"PRIu32" ms, Song position %"PRIu32" ms, Play status %s\n", 697 avrcp_subevent_play_status_get_song_length(packet), 698 avrcp_subevent_play_status_get_song_position(packet), 699 avrcp_play_status2str(avrcp_subevent_play_status_get_play_status(packet))); 700 break; 701 702 case AVRCP_SUBEVENT_OPERATION_COMPLETE: 703 printf("AVRCP Controller: %s complete\n", avrcp_operation2str(avrcp_subevent_operation_complete_get_operation_id(packet))); 704 break; 705 706 case AVRCP_SUBEVENT_OPERATION_START: 707 printf("AVRCP Controller: %s start\n", avrcp_operation2str(avrcp_subevent_operation_start_get_operation_id(packet))); 708 break; 709 710 case AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_END: 711 printf("AVRCP Controller: Track reached end\n"); 712 break; 713 714 case AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE: 715 printf("AVRCP Controller: Set Player App Value %s\n", avrcp_ctype2str(avrcp_subevent_player_application_value_response_get_command_type(packet))); 716 break; 717 718 default: 719 break; 720 } 721 } 722 723 static void avrcp_volume_changed(uint8_t volume){ 724 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 725 if (audio){ 726 audio->set_volume(volume); 727 } 728 } 729 730 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 731 UNUSED(channel); 732 UNUSED(size); 733 734 if (packet_type != HCI_EVENT_PACKET) return; 735 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 736 737 uint8_t volume; 738 char const * button_state; 739 avrcp_operation_id_t operation_id; 740 741 switch (packet[2]){ 742 case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED: 743 volume = avrcp_subevent_notification_volume_changed_get_absolute_volume(packet); 744 volume_percentage = volume * 100 / 127; 745 printf("AVRCP Target : Volume set to %d%% (%d)\n", volume_percentage, volume); 746 avrcp_volume_changed(volume); 747 break; 748 749 case AVRCP_SUBEVENT_OPERATION: 750 operation_id = avrcp_subevent_operation_get_operation_id(packet); 751 button_state = avrcp_subevent_operation_get_button_pressed(packet) > 0 ? "PRESS" : "RELEASE"; 752 switch (operation_id){ 753 case AVRCP_OPERATION_ID_VOLUME_UP: 754 printf("AVRCP Target : VOLUME UP (%s)\n", button_state); 755 break; 756 case AVRCP_OPERATION_ID_VOLUME_DOWN: 757 printf("AVRCP Target : VOLUME UP (%s)\n", button_state); 758 break; 759 default: 760 return; 761 } 762 break; 763 default: 764 printf("AVRCP Target : Event 0x%02x is not parsed\n", packet[2]); 765 break; 766 } 767 } 768 769 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 770 UNUSED(channel); 771 UNUSED(size); 772 if (packet_type != HCI_EVENT_PACKET) return; 773 if (hci_event_packet_get_type(packet) == HCI_EVENT_PIN_CODE_REQUEST) { 774 bd_addr_t address; 775 printf("Pin code request - using '0000'\n"); 776 hci_event_pin_code_request_get_bd_addr(packet, address); 777 gap_pin_code_response(address, "0000"); 778 } 779 } 780 781 static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 782 UNUSED(channel); 783 UNUSED(size); 784 bd_addr_t address; 785 uint8_t status; 786 787 uint8_t allocation_method; 788 789 if (packet_type != HCI_EVENT_PACKET) return; 790 if (hci_event_packet_get_type(packet) != HCI_EVENT_A2DP_META) return; 791 792 switch (packet[2]){ 793 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 794 printf("A2DP Sink : Received non SBC codec - not implemented\n"); 795 break; 796 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 797 printf("A2DP Sink : Received SBC codec configuration\n"); 798 sbc_configuration.reconfigure = a2dp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 799 sbc_configuration.num_channels = a2dp_subevent_signaling_media_codec_sbc_configuration_get_num_channels(packet); 800 sbc_configuration.sampling_frequency = a2dp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 801 sbc_configuration.block_length = a2dp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 802 sbc_configuration.subbands = a2dp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 803 sbc_configuration.min_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 804 sbc_configuration.max_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 805 806 allocation_method = a2dp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 807 808 // Adapt Bluetooth spec definition to SBC Encoder expected input 809 sbc_configuration.allocation_method = (btstack_sbc_allocation_method_t)(allocation_method - 1); 810 811 switch (a2dp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet)){ 812 case AVDTP_CHANNEL_MODE_JOINT_STEREO: 813 sbc_configuration.channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO; 814 break; 815 case AVDTP_CHANNEL_MODE_STEREO: 816 sbc_configuration.channel_mode = SBC_CHANNEL_MODE_STEREO; 817 break; 818 case AVDTP_CHANNEL_MODE_DUAL_CHANNEL: 819 sbc_configuration.channel_mode = SBC_CHANNEL_MODE_DUAL_CHANNEL; 820 break; 821 case AVDTP_CHANNEL_MODE_MONO: 822 sbc_configuration.channel_mode = SBC_CHANNEL_MODE_MONO; 823 break; 824 default: 825 btstack_assert(false); 826 break; 827 } 828 dump_sbc_configuration(sbc_configuration); 829 830 if (sbc_configuration.reconfigure){ 831 media_processing_close(); 832 } 833 // prepare media processing 834 media_processing_init(sbc_configuration); 835 break; 836 } 837 case A2DP_SUBEVENT_STREAM_ESTABLISHED: 838 a2dp_subevent_stream_established_get_bd_addr(packet, address); 839 status = a2dp_subevent_stream_established_get_status(packet); 840 if (status != ERROR_CODE_SUCCESS){ 841 printf("A2DP Sink : Streaming connection failed, status 0x%02x\n", status); 842 break; 843 } 844 845 a2dp_cid = a2dp_subevent_stream_established_get_a2dp_cid(packet); 846 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); 847 #ifdef HAVE_BTSTACK_STDIN 848 // use address for outgoing connections 849 memcpy(device_addr, address, 6); 850 #endif 851 break; 852 853 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 854 case A2DP_SUBEVENT_START_STREAM_REQUESTED: 855 printf("A2DP Sink : Explicit Accept to start stream, local_seid 0x%02x\n", a2dp_subevent_start_stream_requested_get_local_seid(packet)); 856 a2dp_sink_start_stream_accept(a2dp_cid, a2dp_local_seid); 857 break; 858 #endif 859 case A2DP_SUBEVENT_STREAM_STARTED: 860 printf("A2DP Sink : Stream started\n"); 861 // audio stream is started when buffer reaches minimal level 862 break; 863 864 case A2DP_SUBEVENT_STREAM_SUSPENDED: 865 printf("A2DP Sink : Stream paused\n"); 866 media_processing_pause(); 867 break; 868 869 case A2DP_SUBEVENT_STREAM_RELEASED: 870 printf("A2DP Sink : Stream released\n"); 871 media_processing_close(); 872 break; 873 874 case A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 875 printf("A2DP Sink : Signaling connection released\n"); 876 media_processing_close(); 877 break; 878 879 default: 880 break; 881 } 882 } 883 884 #ifdef HAVE_BTSTACK_STDIN 885 static void show_usage(void){ 886 bd_addr_t iut_address; 887 gap_local_bd_addr(iut_address); 888 printf("\n--- Bluetooth AVDTP Sink/AVRCP Connection Test Console %s ---\n", bd_addr_to_str(iut_address)); 889 printf("b - AVDTP Sink create connection to addr %s\n", bd_addr_to_str(device_addr)); 890 printf("B - AVDTP Sink disconnect\n"); 891 printf("c - AVRCP create connection to addr %s\n", bd_addr_to_str(device_addr)); 892 printf("C - AVRCP disconnect\n"); 893 894 printf("w - delay report\n"); 895 896 printf("\n--- Bluetooth AVRCP Commands %s ---\n", bd_addr_to_str(iut_address)); 897 printf("O - get play status\n"); 898 printf("j - get now playing info\n"); 899 printf("k - play\n"); 900 printf("K - stop\n"); 901 printf("L - pause\n"); 902 printf("u - start fast forward\n"); 903 printf("U - stop fast forward\n"); 904 printf("n - start rewind\n"); 905 printf("N - stop rewind\n"); 906 printf("i - forward\n"); 907 printf("I - backward\n"); 908 printf("M - mute\n"); 909 printf("r - skip\n"); 910 printf("q - query repeat and shuffle mode\n"); 911 printf("v - repeat single track\n"); 912 printf("x - repeat all tracks\n"); 913 printf("X - disable repeat mode\n"); 914 printf("z - shuffle all tracks\n"); 915 printf("Z - disable shuffle mode\n"); 916 917 printf("a/A - register/deregister TRACK_CHANGED\n"); 918 printf("R/P - register/deregister PLAYBACK_POS_CHANGED\n"); 919 920 printf("s/S - send/release long button press REWIND\n"); 921 922 printf("\n--- Volume and Battery Control ---\n"); 923 printf("t - volume up for 10 percent\n"); 924 printf("T - volume down for 10 percent\n"); 925 printf("V - toggle Battery status from AVRCP_BATTERY_STATUS_NORMAL to AVRCP_BATTERY_STATUS_FULL_CHARGE\n"); 926 printf("---\n"); 927 } 928 #endif 929 930 #ifdef HAVE_BTSTACK_STDIN 931 static void stdin_process(char cmd){ 932 uint8_t status = ERROR_CODE_SUCCESS; 933 uint8_t volume; 934 avrcp_battery_status_t old_battery_status; 935 936 switch (cmd){ 937 case 'b': 938 status = a2dp_sink_establish_stream(device_addr, a2dp_local_seid, &a2dp_cid); 939 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); 940 break; 941 case 'B': 942 printf(" - AVDTP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 943 a2dp_sink_disconnect(a2dp_cid); 944 break; 945 case 'c': 946 printf(" - Create AVRCP connection to addr %s.\n", bd_addr_to_str(device_addr)); 947 status = avrcp_connect(device_addr, &avrcp_cid); 948 break; 949 case 'C': 950 printf(" - AVRCP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 951 status = avrcp_disconnect(avrcp_cid); 952 break; 953 954 case '\n': 955 case '\r': 956 break; 957 case 'w': 958 printf("Send delay report\n"); 959 avdtp_sink_delay_report(a2dp_cid, a2dp_local_seid, 100); 960 break; 961 // Volume Control 962 case 't': 963 volume_percentage = volume_percentage <= 90 ? volume_percentage + 10 : 100; 964 volume = volume_percentage * 127 / 100; 965 printf(" - volume up for 10 percent, %d%% (%d) \n", volume_percentage, volume); 966 status = avrcp_target_volume_changed(avrcp_cid, volume); 967 avrcp_volume_changed(volume); 968 break; 969 case 'T': 970 volume_percentage = volume_percentage >= 10 ? volume_percentage - 10 : 0; 971 volume = volume_percentage * 127 / 100; 972 printf(" - volume down for 10 percent, %d%% (%d) \n", volume_percentage, volume); 973 status = avrcp_target_volume_changed(avrcp_cid, volume); 974 avrcp_volume_changed(volume); 975 break; 976 case 'V': 977 old_battery_status = battery_status; 978 979 if (battery_status < AVRCP_BATTERY_STATUS_FULL_CHARGE){ 980 battery_status = (avrcp_battery_status_t)((uint8_t) battery_status + 1); 981 } else { 982 battery_status = AVRCP_BATTERY_STATUS_NORMAL; 983 } 984 printf(" - toggle battery value, old %d, new %d\n", old_battery_status, battery_status); 985 status = avrcp_target_battery_status_changed(avrcp_cid, battery_status); 986 break; 987 case 'O': 988 printf(" - get play status\n"); 989 status = avrcp_controller_get_play_status(avrcp_cid); 990 break; 991 case 'j': 992 printf(" - get now playing info\n"); 993 status = avrcp_controller_get_now_playing_info(avrcp_cid); 994 break; 995 case 'k': 996 printf(" - play\n"); 997 status = avrcp_controller_play(avrcp_cid); 998 break; 999 case 'K': 1000 printf(" - stop\n"); 1001 status = avrcp_controller_stop(avrcp_cid); 1002 break; 1003 case 'L': 1004 printf(" - pause\n"); 1005 status = avrcp_controller_pause(avrcp_cid); 1006 break; 1007 case 'u': 1008 printf(" - start fast forward\n"); 1009 status = avrcp_controller_press_and_hold_fast_forward(avrcp_cid); 1010 break; 1011 case 'U': 1012 printf(" - stop fast forward\n"); 1013 status = avrcp_controller_release_press_and_hold_cmd(avrcp_cid); 1014 break; 1015 case 'n': 1016 printf(" - start rewind\n"); 1017 status = avrcp_controller_press_and_hold_rewind(avrcp_cid); 1018 break; 1019 case 'N': 1020 printf(" - stop rewind\n"); 1021 status = avrcp_controller_release_press_and_hold_cmd(avrcp_cid); 1022 break; 1023 case 'i': 1024 printf(" - forward\n"); 1025 status = avrcp_controller_forward(avrcp_cid); 1026 break; 1027 case 'I': 1028 printf(" - backward\n"); 1029 status = avrcp_controller_backward(avrcp_cid); 1030 break; 1031 case 'M': 1032 printf(" - mute\n"); 1033 status = avrcp_controller_mute(avrcp_cid); 1034 break; 1035 case 'r': 1036 printf(" - skip\n"); 1037 status = avrcp_controller_skip(avrcp_cid); 1038 break; 1039 case 'q': 1040 printf(" - query repeat and shuffle mode\n"); 1041 status = avrcp_controller_query_shuffle_and_repeat_modes(avrcp_cid); 1042 break; 1043 case 'v': 1044 printf(" - repeat single track\n"); 1045 status = avrcp_controller_set_repeat_mode(avrcp_cid, AVRCP_REPEAT_MODE_SINGLE_TRACK); 1046 break; 1047 case 'x': 1048 printf(" - repeat all tracks\n"); 1049 status = avrcp_controller_set_repeat_mode(avrcp_cid, AVRCP_REPEAT_MODE_ALL_TRACKS); 1050 break; 1051 case 'X': 1052 printf(" - disable repeat mode\n"); 1053 status = avrcp_controller_set_repeat_mode(avrcp_cid, AVRCP_REPEAT_MODE_OFF); 1054 break; 1055 case 'z': 1056 printf(" - shuffle all tracks\n"); 1057 status = avrcp_controller_set_shuffle_mode(avrcp_cid, AVRCP_SHUFFLE_MODE_ALL_TRACKS); 1058 break; 1059 case 'Z': 1060 printf(" - disable shuffle mode\n"); 1061 status = avrcp_controller_set_shuffle_mode(avrcp_cid, AVRCP_SHUFFLE_MODE_OFF); 1062 break; 1063 case 'a': 1064 printf("AVRCP: enable notification TRACK_CHANGED\n"); 1065 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1066 break; 1067 case 'A': 1068 printf("AVRCP: disable notification TRACK_CHANGED\n"); 1069 avrcp_controller_disable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1070 break; 1071 case 'R': 1072 printf("AVRCP: enable notification PLAYBACK_POS_CHANGED\n"); 1073 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 1074 break; 1075 case 'P': 1076 printf("AVRCP: disable notification PLAYBACK_POS_CHANGED\n"); 1077 avrcp_controller_disable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 1078 break; 1079 case 's': 1080 printf("AVRCP: send long button press REWIND\n"); 1081 avrcp_controller_start_press_and_hold_cmd(avrcp_cid, AVRCP_OPERATION_ID_REWIND); 1082 break; 1083 case 'S': 1084 printf("AVRCP: release long button press REWIND\n"); 1085 avrcp_controller_release_press_and_hold_cmd(avrcp_cid); 1086 break; 1087 default: 1088 show_usage(); 1089 return; 1090 } 1091 if (status != ERROR_CODE_SUCCESS){ 1092 printf("Could not perform command, status 0x%02x\n", status); 1093 } 1094 } 1095 #endif 1096 1097 int btstack_main(int argc, const char * argv[]); 1098 int btstack_main(int argc, const char * argv[]){ 1099 UNUSED(argc); 1100 (void)argv; 1101 1102 a2dp_and_avrcp_setup(); 1103 1104 #ifdef HAVE_BTSTACK_STDIN 1105 // parse human readable Bluetooth address 1106 sscanf_bd_addr(device_addr_string, device_addr); 1107 btstack_stdin_setup(stdin_process); 1108 #endif 1109 1110 // turn on! 1111 printf("Starting BTstack ...\n"); 1112 hci_power_control(HCI_POWER_ON); 1113 return 0; 1114 } 1115 /* EXAMPLE_END */ 1116