1 /* 2 * Copyright (C) 2023 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 <string.h> 69 70 #include "btstack.h" 71 #include "btstack_resample.h" 72 73 //#define AVRCP_BROWSING_ENABLED 74 75 #ifdef HAVE_BTSTACK_STDIN 76 #include "btstack_stdin.h" 77 #endif 78 79 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 80 #include "btstack_sample_rate_compensation.h" 81 #endif 82 83 #include "btstack_ring_buffer.h" 84 85 #ifdef HAVE_POSIX_FILE_IO 86 #include "wav_util.h" 87 #define STORE_TO_WAV_FILE 88 #endif 89 90 #define NUM_CHANNELS 2 91 #define BYTES_PER_FRAME (2*NUM_CHANNELS) 92 #define MAX_SBC_FRAME_SIZE 120 93 94 #ifdef HAVE_BTSTACK_STDIN 95 static const char * device_addr_string = "5C:F3:70:60:7B:87"; // pts 96 static bd_addr_t device_addr; 97 #endif 98 99 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 100 static btstack_sample_rate_compensation_t sample_rate_compensation; 101 #endif 102 103 static btstack_packet_callback_registration_t hci_event_callback_registration; 104 105 static uint8_t sdp_avdtp_sink_service_buffer[150]; 106 static uint8_t sdp_avrcp_target_service_buffer[150]; 107 static uint8_t sdp_avrcp_controller_service_buffer[200]; 108 static uint8_t device_id_sdp_service_buffer[100]; 109 110 // we support all configurations with bitpool 2-53 111 static uint8_t media_sbc_codec_capabilities[] = { 112 0xFF,//(AVDTP_SBC_44100 << 4) | AVDTP_SBC_STEREO, 113 0xFF,//(AVDTP_SBC_BLOCK_LENGTH_16 << 4) | (AVDTP_SBC_SUBBANDS_8 << 2) | AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS, 114 2, 53 115 }; 116 117 // WAV File 118 #ifdef STORE_TO_WAV_FILE 119 static uint32_t audio_frame_count = 0; 120 static char * wav_filename = "a2dp_sink_demo.wav"; 121 #endif 122 123 // SBC Decoder for WAV file or live playback 124 static btstack_sbc_decoder_state_t state; 125 static btstack_sbc_mode_t mode = SBC_MODE_STANDARD; 126 127 // ring buffer for SBC Frames 128 // below 30: add samples, 30-40: fine, above 40: drop samples 129 #define OPTIMAL_FRAMES_MIN 60 130 #define OPTIMAL_FRAMES_MAX 80 131 #define ADDITIONAL_FRAMES 30 132 static uint8_t sbc_frame_storage[(OPTIMAL_FRAMES_MAX + ADDITIONAL_FRAMES) * MAX_SBC_FRAME_SIZE]; 133 static btstack_ring_buffer_t sbc_frame_ring_buffer; 134 static unsigned int sbc_frame_size; 135 136 // overflow buffer for not fully used sbc frames, with additional frames for resampling 137 static uint8_t decoded_audio_storage[(128+16) * BYTES_PER_FRAME]; 138 static btstack_ring_buffer_t decoded_audio_ring_buffer; 139 140 static int media_initialized = 0; 141 static int audio_stream_started; 142 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 143 static int l2cap_stream_started; 144 #endif 145 static btstack_resample_t resample_instance; 146 147 // temp storage of lower-layer request for audio samples 148 static int16_t * request_buffer; 149 static int request_frames; 150 151 // sink state 152 static int volume_percentage = 0; 153 static avrcp_battery_status_t battery_status = AVRCP_BATTERY_STATUS_WARNING; 154 155 typedef struct { 156 uint8_t reconfigure; 157 uint8_t num_channels; 158 uint16_t sampling_frequency; 159 uint8_t block_length; 160 uint8_t subbands; 161 uint8_t min_bitpool_value; 162 uint8_t max_bitpool_value; 163 btstack_sbc_channel_mode_t channel_mode; 164 btstack_sbc_allocation_method_t allocation_method; 165 } media_codec_configuration_sbc_t; 166 167 typedef enum { 168 STREAM_STATE_CLOSED, 169 STREAM_STATE_OPEN, 170 STREAM_STATE_PLAYING, 171 STREAM_STATE_PAUSED, 172 } stream_state_t; 173 174 typedef struct { 175 uint8_t a2dp_local_seid; 176 uint8_t media_sbc_codec_configuration[4]; 177 } a2dp_sink_demo_stream_endpoint_t; 178 static a2dp_sink_demo_stream_endpoint_t a2dp_sink_demo_stream_endpoint; 179 180 typedef struct { 181 bd_addr_t addr; 182 uint16_t a2dp_cid; 183 uint8_t a2dp_local_seid; 184 stream_state_t stream_state; 185 media_codec_configuration_sbc_t sbc_configuration; 186 } a2dp_sink_demo_a2dp_connection_t; 187 static a2dp_sink_demo_a2dp_connection_t a2dp_sink_demo_a2dp_connection; 188 189 typedef struct { 190 bd_addr_t addr; 191 uint16_t avrcp_cid; 192 bool playing; 193 uint16_t notifications_supported_by_target; 194 } a2dp_sink_demo_avrcp_connection_t; 195 static a2dp_sink_demo_avrcp_connection_t a2dp_sink_demo_avrcp_connection; 196 197 /* @section Main Application Setup 198 * 199 * @text The Listing MainConfiguration shows how to set up 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 AVRCP 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 in a 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 * packet, 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 setup_demo(void){ 231 232 // init protocols 233 l2cap_init(); 234 sdp_init(); 235 #ifdef ENABLE_BLE 236 // Initialize LE Security Manager. Needed for cross-transport key derivation 237 sm_init(); 238 #endif 239 240 241 // Init profiles 242 a2dp_sink_init(); 243 avrcp_init(); 244 avrcp_controller_init(); 245 avrcp_target_init(); 246 247 248 // Configure A2DP Sink 249 a2dp_sink_register_packet_handler(&a2dp_sink_packet_handler); 250 a2dp_sink_register_media_handler(&handle_l2cap_media_data_packet); 251 a2dp_sink_demo_stream_endpoint_t * stream_endpoint = &a2dp_sink_demo_stream_endpoint; 252 avdtp_stream_endpoint_t * local_stream_endpoint = a2dp_sink_create_stream_endpoint(AVDTP_AUDIO, 253 AVDTP_CODEC_SBC, media_sbc_codec_capabilities, sizeof(media_sbc_codec_capabilities), 254 stream_endpoint->media_sbc_codec_configuration, sizeof(stream_endpoint->media_sbc_codec_configuration)); 255 btstack_assert(local_stream_endpoint != NULL); 256 // - Store stream enpoint's SEP ID, as it is used by A2DP API to identify the stream endpoint 257 stream_endpoint->a2dp_local_seid = avdtp_local_seid(local_stream_endpoint); 258 259 260 // Configure AVRCP Controller + Target 261 avrcp_register_packet_handler(&avrcp_packet_handler); 262 avrcp_controller_register_packet_handler(&avrcp_controller_packet_handler); 263 avrcp_target_register_packet_handler(&avrcp_target_packet_handler); 264 265 266 // Configure SDP 267 268 // - Create and register A2DP Sink service record 269 memset(sdp_avdtp_sink_service_buffer, 0, sizeof(sdp_avdtp_sink_service_buffer)); 270 a2dp_sink_create_sdp_record(sdp_avdtp_sink_service_buffer, sdp_create_service_record_handle(), 271 AVDTP_SINK_FEATURE_MASK_HEADPHONE, NULL, NULL); 272 sdp_register_service(sdp_avdtp_sink_service_buffer); 273 274 // - Create AVRCP Controller service record and register it with SDP. We send Category 1 commands to the media player, e.g. play/pause 275 memset(sdp_avrcp_controller_service_buffer, 0, sizeof(sdp_avrcp_controller_service_buffer)); 276 uint16_t controller_supported_features = AVRCP_FEATURE_MASK_CATEGORY_PLAYER_OR_RECORDER; 277 #ifdef AVRCP_BROWSING_ENABLED 278 controller_supported_features |= AVRCP_FEATURE_MASK_BROWSING; 279 #endif 280 avrcp_controller_create_sdp_record(sdp_avrcp_controller_service_buffer, sdp_create_service_record_handle(), 281 controller_supported_features, NULL, NULL); 282 sdp_register_service(sdp_avrcp_controller_service_buffer); 283 284 // - Create and register A2DP Sink service record 285 // - We receive Category 2 commands from the media player, e.g. volume up/down 286 memset(sdp_avrcp_target_service_buffer, 0, sizeof(sdp_avrcp_target_service_buffer)); 287 uint16_t target_supported_features = AVRCP_FEATURE_MASK_CATEGORY_MONITOR_OR_AMPLIFIER; 288 avrcp_target_create_sdp_record(sdp_avrcp_target_service_buffer, 289 sdp_create_service_record_handle(), target_supported_features, NULL, NULL); 290 sdp_register_service(sdp_avrcp_target_service_buffer); 291 292 // - Create and register Device ID (PnP) service record 293 memset(device_id_sdp_service_buffer, 0, sizeof(device_id_sdp_service_buffer)); 294 device_id_create_sdp_record(device_id_sdp_service_buffer, 295 sdp_create_service_record_handle(), DEVICE_ID_VENDOR_ID_SOURCE_BLUETOOTH, BLUETOOTH_COMPANY_ID_BLUEKITCHEN_GMBH, 1, 1); 296 sdp_register_service(device_id_sdp_service_buffer); 297 298 299 // Configure GAP - discovery / connection 300 301 // - Set local name with a template Bluetooth address, that will be automatically 302 // replaced with an actual address once it is available, i.e. when BTstack boots 303 // up and starts talking to a Bluetooth module. 304 gap_set_local_name("A2DP Sink Demo 00:00:00:00:00:00"); 305 306 // - Allow to show up in Bluetooth inquiry 307 gap_discoverable_control(1); 308 309 // - Set Class of Device - Service Class: Audio, Major Device Class: Audio, Minor: Loudspeaker 310 gap_set_class_of_device(0x200414); 311 312 // - Allow for role switch in general and sniff mode 313 gap_set_default_link_policy_settings( LM_LINK_POLICY_ENABLE_ROLE_SWITCH | LM_LINK_POLICY_ENABLE_SNIFF_MODE ); 314 315 // - Allow for role switch on outgoing connections 316 // - This allows A2DP Source, e.g. smartphone, to become master when we re-connect to it. 317 gap_set_allow_role_switch(true); 318 319 320 // Register for HCI events 321 hci_event_callback_registration.callback = &hci_packet_handler; 322 hci_add_event_handler(&hci_event_callback_registration); 323 324 // Inform about audio playback / test options 325 #ifdef HAVE_POSIX_FILE_IO 326 if (!btstack_audio_sink_get_instance()){ 327 printf("No audio playback.\n"); 328 } else { 329 printf("Audio playback supported.\n"); 330 } 331 #ifdef STORE_TO_WAV_FILE 332 printf("Audio will be stored to \'%s\' file.\n", wav_filename); 333 #endif 334 #endif 335 return 0; 336 } 337 /* LISTING_END */ 338 339 340 static void playback_handler(int16_t * buffer, uint16_t num_audio_frames){ 341 342 #ifdef STORE_TO_WAV_FILE 343 int wav_samples = num_audio_frames * NUM_CHANNELS; 344 int16_t * wav_buffer = buffer; 345 #endif 346 347 // called from lower-layer but guaranteed to be on main thread 348 if (sbc_frame_size == 0){ 349 memset(buffer, 0, num_audio_frames * BYTES_PER_FRAME); 350 return; 351 } 352 353 // first fill from resampled audio 354 uint32_t bytes_read; 355 btstack_ring_buffer_read(&decoded_audio_ring_buffer, (uint8_t *) buffer, num_audio_frames * BYTES_PER_FRAME, &bytes_read); 356 buffer += bytes_read / NUM_CHANNELS; 357 num_audio_frames -= bytes_read / BYTES_PER_FRAME; 358 359 // then start decoding sbc frames using request_* globals 360 request_buffer = buffer; 361 request_frames = num_audio_frames; 362 while (request_frames && btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) >= sbc_frame_size){ 363 // decode frame 364 uint8_t sbc_frame[MAX_SBC_FRAME_SIZE]; 365 btstack_ring_buffer_read(&sbc_frame_ring_buffer, sbc_frame, sbc_frame_size, &bytes_read); 366 btstack_sbc_decoder_process_data(&state, 0, sbc_frame, sbc_frame_size); 367 } 368 369 #ifdef STORE_TO_WAV_FILE 370 audio_frame_count += num_audio_frames; 371 wav_writer_write_int16(wav_samples, wav_buffer); 372 #endif 373 } 374 375 static void handle_pcm_data(int16_t * data, int num_audio_frames, int num_channels, int sample_rate, void * context){ 376 UNUSED(sample_rate); 377 UNUSED(context); 378 UNUSED(num_channels); // must be stereo == 2 379 380 const btstack_audio_sink_t * audio_sink = btstack_audio_sink_get_instance(); 381 if (!audio_sink){ 382 #ifdef STORE_TO_WAV_FILE 383 audio_frame_count += num_audio_frames; 384 wav_writer_write_int16(num_audio_frames * NUM_CHANNELS, data); 385 #endif 386 return; 387 } 388 389 // resample into request buffer - add some additional space for resampling 390 int16_t output_buffer[(128+16) * NUM_CHANNELS]; // 16 * 8 * 2 391 uint32_t resampled_frames = btstack_resample_block(&resample_instance, data, num_audio_frames, output_buffer); 392 393 // store data in btstack_audio buffer first 394 int frames_to_copy = btstack_min(resampled_frames, request_frames); 395 memcpy(request_buffer, output_buffer, frames_to_copy * BYTES_PER_FRAME); 396 request_frames -= frames_to_copy; 397 request_buffer += frames_to_copy * NUM_CHANNELS; 398 399 // and rest in ring buffer 400 int frames_to_store = resampled_frames - frames_to_copy; 401 if (frames_to_store){ 402 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); 403 if (status){ 404 printf("Error storing samples in PCM ring buffer!!!\n"); 405 } 406 } 407 } 408 409 static int media_processing_init(media_codec_configuration_sbc_t * configuration){ 410 if (media_initialized) return 0; 411 btstack_sbc_decoder_init(&state, mode, handle_pcm_data, NULL); 412 413 #ifdef STORE_TO_WAV_FILE 414 wav_writer_open(wav_filename, configuration->num_channels, configuration->sampling_frequency); 415 #endif 416 417 btstack_ring_buffer_init(&sbc_frame_ring_buffer, sbc_frame_storage, sizeof(sbc_frame_storage)); 418 btstack_ring_buffer_init(&decoded_audio_ring_buffer, decoded_audio_storage, sizeof(decoded_audio_storage)); 419 btstack_resample_init(&resample_instance, configuration->num_channels); 420 421 // setup audio playback 422 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 423 if (audio){ 424 audio->init(NUM_CHANNELS, configuration->sampling_frequency, &playback_handler); 425 } 426 427 audio_stream_started = 0; 428 media_initialized = 1; 429 return 0; 430 } 431 432 static void media_processing_start(void){ 433 if (!media_initialized) return; 434 435 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 436 btstack_sample_rate_compensation_reset( &sample_rate_compensation, btstack_run_loop_get_time_ms() ); 437 #endif 438 // setup audio playback 439 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 440 if (audio){ 441 audio->start_stream(); 442 } 443 audio_stream_started = 1; 444 } 445 446 static void media_processing_pause(void){ 447 if (!media_initialized) return; 448 449 // stop audio playback 450 audio_stream_started = 0; 451 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 452 l2cap_stream_started = 0; 453 #endif 454 455 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 456 if (audio){ 457 audio->stop_stream(); 458 } 459 // discard pending data 460 btstack_ring_buffer_reset(&decoded_audio_ring_buffer); 461 btstack_ring_buffer_reset(&sbc_frame_ring_buffer); 462 } 463 464 static void media_processing_close(void){ 465 if (!media_initialized) return; 466 467 media_initialized = 0; 468 audio_stream_started = 0; 469 sbc_frame_size = 0; 470 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 471 l2cap_stream_started = 0; 472 #endif 473 474 #ifdef STORE_TO_WAV_FILE 475 wav_writer_close(); 476 uint32_t total_frames_nr = state.good_frames_nr + state.bad_frames_nr + state.zero_frames_nr; 477 478 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); 479 printf("WAV Writer: Wrote %u audio frames to wav file: %s\n", audio_frame_count, wav_filename); 480 #endif 481 482 // stop audio playback 483 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 484 if (audio){ 485 printf("close stream\n"); 486 audio->close(); 487 } 488 } 489 490 /* @section Handle Media Data Packet 491 * 492 * @text Here the audio data, are received through the handle_l2cap_media_data_packet callback. 493 * Currently, only the SBC media codec is supported. Hence, the media data consists of the media packet header and the SBC packet. 494 * 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). 495 * If the audio stream wasn't started already and there are enough SBC frames in the ring buffer, start playback. 496 */ 497 498 static int read_media_data_header(uint8_t * packet, int size, int * offset, avdtp_media_packet_header_t * media_header); 499 static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header); 500 501 static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size){ 502 UNUSED(seid); 503 int pos = 0; 504 505 avdtp_media_packet_header_t media_header; 506 if (!read_media_data_header(packet, size, &pos, &media_header)) return; 507 508 avdtp_sbc_codec_header_t sbc_header; 509 if (!read_sbc_header(packet, size, &pos, &sbc_header)) return; 510 511 int packet_length = size-pos; 512 uint8_t *packet_begin = packet+pos; 513 514 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 515 // process data right away if there's no audio implementation active, e.g. on posix systems to store as .wav 516 if (!audio){ 517 btstack_sbc_decoder_process_data(&state, 0, packet_begin, packet_length); 518 return; 519 } 520 521 522 // store sbc frame size for buffer management 523 sbc_frame_size = packet_length / sbc_header.num_frames; 524 int status = btstack_ring_buffer_write(&sbc_frame_ring_buffer, packet_begin, packet_length); 525 if (status != ERROR_CODE_SUCCESS){ 526 printf("Error storing samples in SBC ring buffer!!!\n"); 527 } 528 529 // decide on audio sync drift based on number of sbc frames in queue 530 int sbc_frames_in_buffer = btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) / sbc_frame_size; 531 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 532 if( !l2cap_stream_started && audio_stream_started ) { 533 l2cap_stream_started = 1; 534 btstack_sample_rate_compensation_init( &sample_rate_compensation, btstack_run_loop_get_time_ms(), a2dp_sink_demo_a2dp_connection.sbc_configuration.sampling_frequency, FLOAT_TO_Q15(1.f) ); 535 } 536 // update sample rate compensation 537 if( audio_stream_started && (audio != NULL)) { 538 uint32_t resampling_factor = btstack_sample_rate_compensation_update( &sample_rate_compensation, btstack_run_loop_get_time_ms(), sbc_header.num_frames*128, audio->get_samplerate() ); 539 btstack_resample_set_factor(&resample_instance, resampling_factor); 540 // printf("sbc buffer level : %"PRIu32"\n", btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer)); 541 } 542 #else 543 uint32_t resampling_factor; 544 545 // nominal factor (fixed-point 2^16) and compensation offset 546 uint32_t nominal_factor = 0x10000; 547 uint32_t compensation = 0x00100; 548 549 if (sbc_frames_in_buffer < OPTIMAL_FRAMES_MIN){ 550 resampling_factor = nominal_factor - compensation; // stretch samples 551 } else if (sbc_frames_in_buffer <= OPTIMAL_FRAMES_MAX){ 552 resampling_factor = nominal_factor; // nothing to do 553 } else { 554 resampling_factor = nominal_factor + compensation; // compress samples 555 } 556 557 btstack_resample_set_factor(&resample_instance, resampling_factor); 558 #endif 559 // start stream if enough frames buffered 560 if (!audio_stream_started && sbc_frames_in_buffer >= OPTIMAL_FRAMES_MIN){ 561 media_processing_start(); 562 } 563 } 564 565 static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header){ 566 int sbc_header_len = 12; // without crc 567 int pos = *offset; 568 569 if (size - pos < sbc_header_len){ 570 printf("Not enough data to read SBC header, expected %d, received %d\n", sbc_header_len, size-pos); 571 return 0; 572 } 573 574 sbc_header->fragmentation = get_bit16(packet[pos], 7); 575 sbc_header->starting_packet = get_bit16(packet[pos], 6); 576 sbc_header->last_packet = get_bit16(packet[pos], 5); 577 sbc_header->num_frames = packet[pos] & 0x0f; 578 pos++; 579 *offset = pos; 580 return 1; 581 } 582 583 static int read_media_data_header(uint8_t *packet, int size, int *offset, avdtp_media_packet_header_t *media_header){ 584 int media_header_len = 12; // without crc 585 int pos = *offset; 586 587 if (size - pos < media_header_len){ 588 printf("Not enough data to read media packet header, expected %d, received %d\n", media_header_len, size-pos); 589 return 0; 590 } 591 592 media_header->version = packet[pos] & 0x03; 593 media_header->padding = get_bit16(packet[pos],2); 594 media_header->extension = get_bit16(packet[pos],3); 595 media_header->csrc_count = (packet[pos] >> 4) & 0x0F; 596 pos++; 597 598 media_header->marker = get_bit16(packet[pos],0); 599 media_header->payload_type = (packet[pos] >> 1) & 0x7F; 600 pos++; 601 602 media_header->sequence_number = big_endian_read_16(packet, pos); 603 pos+=2; 604 605 media_header->timestamp = big_endian_read_32(packet, pos); 606 pos+=4; 607 608 media_header->synchronization_source = big_endian_read_32(packet, pos); 609 pos+=4; 610 *offset = pos; 611 return 1; 612 } 613 614 static void dump_sbc_configuration(media_codec_configuration_sbc_t * configuration){ 615 printf(" - num_channels: %d\n", configuration->num_channels); 616 printf(" - sampling_frequency: %d\n", configuration->sampling_frequency); 617 printf(" - channel_mode: %d\n", configuration->channel_mode); 618 printf(" - block_length: %d\n", configuration->block_length); 619 printf(" - subbands: %d\n", configuration->subbands); 620 printf(" - allocation_method: %d\n", configuration->allocation_method); 621 printf(" - bitpool_value [%d, %d] \n", configuration->min_bitpool_value, configuration->max_bitpool_value); 622 printf("\n"); 623 } 624 625 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 626 UNUSED(channel); 627 UNUSED(size); 628 uint16_t local_cid; 629 uint8_t status; 630 bd_addr_t address; 631 632 a2dp_sink_demo_avrcp_connection_t * connection = &a2dp_sink_demo_avrcp_connection; 633 634 if (packet_type != HCI_EVENT_PACKET) return; 635 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 636 switch (packet[2]){ 637 case AVRCP_SUBEVENT_CONNECTION_ESTABLISHED: { 638 local_cid = avrcp_subevent_connection_established_get_avrcp_cid(packet); 639 status = avrcp_subevent_connection_established_get_status(packet); 640 if (status != ERROR_CODE_SUCCESS){ 641 printf("AVRCP: Connection failed, status 0x%02x\n", status); 642 connection->avrcp_cid = 0; 643 return; 644 } 645 646 connection->avrcp_cid = local_cid; 647 avrcp_subevent_connection_established_get_bd_addr(packet, address); 648 printf("AVRCP: Connected to %s, cid 0x%02x\n", bd_addr_to_str(address), connection->avrcp_cid); 649 650 avrcp_target_support_event(connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED); 651 avrcp_target_support_event(connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED); 652 avrcp_target_battery_status_changed(connection->avrcp_cid, battery_status); 653 654 // query supported events: 655 avrcp_controller_get_supported_events(connection->avrcp_cid); 656 return; 657 } 658 659 case AVRCP_SUBEVENT_CONNECTION_RELEASED: 660 printf("AVRCP: Channel released: cid 0x%02x\n", avrcp_subevent_connection_released_get_avrcp_cid(packet)); 661 connection->avrcp_cid = 0; 662 connection->notifications_supported_by_target = 0; 663 return; 664 default: 665 break; 666 } 667 } 668 669 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 670 UNUSED(channel); 671 UNUSED(size); 672 673 // helper to print c strings 674 uint8_t avrcp_subevent_value[256]; 675 uint8_t play_status; 676 uint8_t event_id; 677 678 a2dp_sink_demo_avrcp_connection_t * avrcp_connection = &a2dp_sink_demo_avrcp_connection; 679 680 if (packet_type != HCI_EVENT_PACKET) return; 681 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 682 if (avrcp_connection->avrcp_cid == 0) return; 683 684 memset(avrcp_subevent_value, 0, sizeof(avrcp_subevent_value)); 685 switch (packet[2]){ 686 case AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID: 687 avrcp_connection->notifications_supported_by_target |= (1 << avrcp_subevent_get_capability_event_id_get_event_id(packet)); 688 break; 689 case AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID_DONE: 690 691 printf("\nSupported remote AVRCP Target notifications:\n"); 692 for (event_id = (uint8_t) AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; event_id < (uint8_t) AVRCP_NOTIFICATION_EVENT_LAST_INDEX; event_id++){ 693 printf(" - [%s] %s\n", 694 (avrcp_connection->notifications_supported_by_target & (1 << event_id)) != 0 ? "X" : " ", 695 avrcp_notification2str((avrcp_notification_event_id_t)event_id)); 696 } 697 printf("\n\n"); 698 699 // automatically enable notifications 700 avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED); 701 avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED); 702 avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 703 break; 704 705 case AVRCP_SUBEVENT_NOTIFICATION_STATE: 706 event_id = (avrcp_notification_event_id_t)avrcp_subevent_notification_state_get_event_id(packet); 707 printf("AVRCP Controller: %s notification registered\n", avrcp_notification2str(event_id)); 708 break; 709 710 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED: 711 printf("AVRCP Controller: Playback position changed, position %d ms\n", (unsigned int) avrcp_subevent_notification_playback_pos_changed_get_playback_position_ms(packet)); 712 break; 713 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_STATUS_CHANGED: 714 printf("AVRCP Controller: Playback status changed %s\n", avrcp_play_status2str(avrcp_subevent_notification_playback_status_changed_get_play_status(packet))); 715 play_status = avrcp_subevent_notification_playback_status_changed_get_play_status(packet); 716 switch (play_status){ 717 case AVRCP_PLAYBACK_STATUS_PLAYING: 718 avrcp_connection->playing = true; 719 break; 720 default: 721 avrcp_connection->playing = false; 722 break; 723 } 724 break; 725 726 case AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED: 727 printf("AVRCP Controller: Playing content changed\n"); 728 break; 729 730 case AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED: 731 printf("AVRCP Controller: Track changed\n"); 732 break; 733 734 case AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED: 735 printf("AVRCP Controller: Available Players Changed\n"); 736 break; 737 738 case AVRCP_SUBEVENT_SHUFFLE_AND_REPEAT_MODE:{ 739 uint8_t shuffle_mode = avrcp_subevent_shuffle_and_repeat_mode_get_shuffle_mode(packet); 740 uint8_t repeat_mode = avrcp_subevent_shuffle_and_repeat_mode_get_repeat_mode(packet); 741 printf("AVRCP Controller: %s, %s\n", avrcp_shuffle2str(shuffle_mode), avrcp_repeat2str(repeat_mode)); 742 break; 743 } 744 case AVRCP_SUBEVENT_NOW_PLAYING_TRACK_INFO: 745 printf("AVRCP Controller: Track %d\n", avrcp_subevent_now_playing_track_info_get_track(packet)); 746 break; 747 748 case AVRCP_SUBEVENT_NOW_PLAYING_TOTAL_TRACKS_INFO: 749 printf("AVRCP Controller: Total Tracks %d\n", avrcp_subevent_now_playing_total_tracks_info_get_total_tracks(packet)); 750 break; 751 752 case AVRCP_SUBEVENT_NOW_PLAYING_TITLE_INFO: 753 if (avrcp_subevent_now_playing_title_info_get_value_len(packet) > 0){ 754 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_title_info_get_value(packet), avrcp_subevent_now_playing_title_info_get_value_len(packet)); 755 printf("AVRCP Controller: Title %s\n", avrcp_subevent_value); 756 } 757 break; 758 759 case AVRCP_SUBEVENT_NOW_PLAYING_ARTIST_INFO: 760 if (avrcp_subevent_now_playing_artist_info_get_value_len(packet) > 0){ 761 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_artist_info_get_value(packet), avrcp_subevent_now_playing_artist_info_get_value_len(packet)); 762 printf("AVRCP Controller: Artist %s\n", avrcp_subevent_value); 763 } 764 break; 765 766 case AVRCP_SUBEVENT_NOW_PLAYING_ALBUM_INFO: 767 if (avrcp_subevent_now_playing_album_info_get_value_len(packet) > 0){ 768 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_album_info_get_value(packet), avrcp_subevent_now_playing_album_info_get_value_len(packet)); 769 printf("AVRCP Controller: Album %s\n", avrcp_subevent_value); 770 } 771 break; 772 773 case AVRCP_SUBEVENT_NOW_PLAYING_GENRE_INFO: 774 if (avrcp_subevent_now_playing_genre_info_get_value_len(packet) > 0){ 775 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_genre_info_get_value(packet), avrcp_subevent_now_playing_genre_info_get_value_len(packet)); 776 printf("AVRCP Controller: Genre %s\n", avrcp_subevent_value); 777 } 778 break; 779 780 case AVRCP_SUBEVENT_PLAY_STATUS: 781 printf("AVRCP Controller: Song length %"PRIu32" ms, Song position %"PRIu32" ms, Play status %s\n", 782 avrcp_subevent_play_status_get_song_length(packet), 783 avrcp_subevent_play_status_get_song_position(packet), 784 avrcp_play_status2str(avrcp_subevent_play_status_get_play_status(packet))); 785 break; 786 787 case AVRCP_SUBEVENT_OPERATION_COMPLETE: 788 printf("AVRCP Controller: %s complete\n", avrcp_operation2str(avrcp_subevent_operation_complete_get_operation_id(packet))); 789 break; 790 791 case AVRCP_SUBEVENT_OPERATION_START: 792 printf("AVRCP Controller: %s start\n", avrcp_operation2str(avrcp_subevent_operation_start_get_operation_id(packet))); 793 break; 794 795 case AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_END: 796 printf("AVRCP Controller: Track reached end\n"); 797 break; 798 799 case AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE: 800 printf("AVRCP Controller: Set Player App Value %s\n", avrcp_ctype2str(avrcp_subevent_player_application_value_response_get_command_type(packet))); 801 break; 802 803 default: 804 break; 805 } 806 } 807 808 static void avrcp_volume_changed(uint8_t volume){ 809 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 810 if (audio){ 811 audio->set_volume(volume); 812 } 813 } 814 815 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 816 UNUSED(channel); 817 UNUSED(size); 818 819 if (packet_type != HCI_EVENT_PACKET) return; 820 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 821 822 uint8_t volume; 823 char const * button_state; 824 avrcp_operation_id_t operation_id; 825 826 switch (packet[2]){ 827 case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED: 828 volume = avrcp_subevent_notification_volume_changed_get_absolute_volume(packet); 829 volume_percentage = volume * 100 / 127; 830 printf("AVRCP Target : Volume set to %d%% (%d)\n", volume_percentage, volume); 831 avrcp_volume_changed(volume); 832 break; 833 834 case AVRCP_SUBEVENT_OPERATION: 835 operation_id = avrcp_subevent_operation_get_operation_id(packet); 836 button_state = avrcp_subevent_operation_get_button_pressed(packet) > 0 ? "PRESS" : "RELEASE"; 837 switch (operation_id){ 838 case AVRCP_OPERATION_ID_VOLUME_UP: 839 printf("AVRCP Target : VOLUME UP (%s)\n", button_state); 840 break; 841 case AVRCP_OPERATION_ID_VOLUME_DOWN: 842 printf("AVRCP Target : VOLUME DOWN (%s)\n", button_state); 843 break; 844 default: 845 return; 846 } 847 break; 848 default: 849 printf("AVRCP Target : Event 0x%02x is not parsed\n", packet[2]); 850 break; 851 } 852 } 853 854 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 855 UNUSED(channel); 856 UNUSED(size); 857 if (packet_type != HCI_EVENT_PACKET) return; 858 if (hci_event_packet_get_type(packet) == HCI_EVENT_PIN_CODE_REQUEST) { 859 bd_addr_t address; 860 printf("Pin code request - using '0000'\n"); 861 hci_event_pin_code_request_get_bd_addr(packet, address); 862 gap_pin_code_response(address, "0000"); 863 } 864 } 865 866 static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 867 UNUSED(channel); 868 UNUSED(size); 869 uint8_t status; 870 871 uint8_t allocation_method; 872 873 if (packet_type != HCI_EVENT_PACKET) return; 874 if (hci_event_packet_get_type(packet) != HCI_EVENT_A2DP_META) return; 875 876 a2dp_sink_demo_a2dp_connection_t * a2dp_conn = &a2dp_sink_demo_a2dp_connection; 877 878 switch (packet[2]){ 879 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 880 printf("A2DP Sink : Received non SBC codec - not implemented\n"); 881 break; 882 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 883 printf("A2DP Sink : Received SBC codec configuration\n"); 884 a2dp_conn->sbc_configuration.reconfigure = a2dp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 885 a2dp_conn->sbc_configuration.num_channels = a2dp_subevent_signaling_media_codec_sbc_configuration_get_num_channels(packet); 886 a2dp_conn->sbc_configuration.sampling_frequency = a2dp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 887 a2dp_conn->sbc_configuration.block_length = a2dp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 888 a2dp_conn->sbc_configuration.subbands = a2dp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 889 a2dp_conn->sbc_configuration.min_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 890 a2dp_conn->sbc_configuration.max_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 891 892 allocation_method = a2dp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 893 894 // Adapt Bluetooth spec definition to SBC Encoder expected input 895 a2dp_conn->sbc_configuration.allocation_method = (btstack_sbc_allocation_method_t)(allocation_method - 1); 896 897 switch (a2dp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet)){ 898 case AVDTP_CHANNEL_MODE_JOINT_STEREO: 899 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO; 900 break; 901 case AVDTP_CHANNEL_MODE_STEREO: 902 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_STEREO; 903 break; 904 case AVDTP_CHANNEL_MODE_DUAL_CHANNEL: 905 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_DUAL_CHANNEL; 906 break; 907 case AVDTP_CHANNEL_MODE_MONO: 908 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_MONO; 909 break; 910 default: 911 btstack_assert(false); 912 break; 913 } 914 dump_sbc_configuration(&a2dp_conn->sbc_configuration); 915 break; 916 } 917 918 case A2DP_SUBEVENT_STREAM_ESTABLISHED: 919 status = a2dp_subevent_stream_established_get_status(packet); 920 if (status != ERROR_CODE_SUCCESS){ 921 printf("A2DP Sink : Streaming connection failed, status 0x%02x\n", status); 922 break; 923 } 924 925 a2dp_subevent_stream_established_get_bd_addr(packet, a2dp_conn->addr); 926 a2dp_conn->a2dp_cid = a2dp_subevent_stream_established_get_a2dp_cid(packet); 927 a2dp_conn->stream_state = STREAM_STATE_OPEN; 928 929 printf("A2DP Sink : Streaming connection is established, address %s, cid 0x%02x, local seid %d\n", 930 bd_addr_to_str(a2dp_conn->addr), a2dp_conn->a2dp_cid, a2dp_conn->a2dp_local_seid); 931 #ifdef HAVE_BTSTACK_STDIN 932 // use address for outgoing connections 933 memcpy(device_addr, a2dp_conn->addr, 6); 934 #endif 935 break; 936 937 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 938 case A2DP_SUBEVENT_START_STREAM_REQUESTED: 939 printf("A2DP Sink : Explicit Accept to start stream, local_seid %d\n", a2dp_subevent_start_stream_requested_get_local_seid(packet)); 940 a2dp_sink_start_stream_accept(a2dp_cid, a2dp_local_seid); 941 break; 942 #endif 943 case A2DP_SUBEVENT_STREAM_STARTED: 944 printf("A2DP Sink : Stream started\n"); 945 a2dp_conn->stream_state = STREAM_STATE_PLAYING; 946 if (a2dp_conn->sbc_configuration.reconfigure){ 947 media_processing_close(); 948 } 949 // prepare media processing 950 media_processing_init(&a2dp_conn->sbc_configuration); 951 // audio stream is started when buffer reaches minimal level 952 break; 953 954 case A2DP_SUBEVENT_STREAM_SUSPENDED: 955 printf("A2DP Sink : Stream paused\n"); 956 a2dp_conn->stream_state = STREAM_STATE_PAUSED; 957 media_processing_pause(); 958 break; 959 960 case A2DP_SUBEVENT_STREAM_RELEASED: 961 printf("A2DP Sink : Stream released\n"); 962 a2dp_conn->stream_state = STREAM_STATE_CLOSED; 963 media_processing_close(); 964 break; 965 966 case A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 967 printf("A2DP Sink : Signaling connection released\n"); 968 a2dp_conn->a2dp_cid = 0; 969 media_processing_close(); 970 break; 971 972 default: 973 break; 974 } 975 } 976 977 #ifdef HAVE_BTSTACK_STDIN 978 static void show_usage(void){ 979 bd_addr_t iut_address; 980 gap_local_bd_addr(iut_address); 981 printf("\n--- Bluetooth AVDTP Sink/AVRCP Connection Test Console %s ---\n", bd_addr_to_str(iut_address)); 982 printf("b - AVDTP Sink create connection to addr %s\n", bd_addr_to_str(device_addr)); 983 printf("B - AVDTP Sink disconnect\n"); 984 printf("c - AVRCP create connection to addr %s\n", bd_addr_to_str(device_addr)); 985 printf("C - AVRCP disconnect\n"); 986 987 printf("w - delay report\n"); 988 989 printf("\n--- Bluetooth AVRCP Commands %s ---\n", bd_addr_to_str(iut_address)); 990 printf("O - get play status\n"); 991 printf("j - get now playing info\n"); 992 printf("k - play\n"); 993 printf("K - stop\n"); 994 printf("L - pause\n"); 995 printf("u - start fast forward\n"); 996 printf("U - stop fast forward\n"); 997 printf("n - start rewind\n"); 998 printf("N - stop rewind\n"); 999 printf("i - forward\n"); 1000 printf("I - backward\n"); 1001 printf("M - mute\n"); 1002 printf("r - skip\n"); 1003 printf("q - query repeat and shuffle mode\n"); 1004 printf("v - repeat single track\n"); 1005 printf("x - repeat all tracks\n"); 1006 printf("X - disable repeat mode\n"); 1007 printf("z - shuffle all tracks\n"); 1008 printf("Z - disable shuffle mode\n"); 1009 1010 printf("a/A - register/deregister TRACK_CHANGED\n"); 1011 printf("R/P - register/deregister PLAYBACK_POS_CHANGED\n"); 1012 1013 printf("s/S - send/release long button press REWIND\n"); 1014 1015 printf("\n--- Volume and Battery Control ---\n"); 1016 printf("t - volume up for 10 percent\n"); 1017 printf("T - volume down for 10 percent\n"); 1018 printf("V - toggle Battery status from AVRCP_BATTERY_STATUS_NORMAL to AVRCP_BATTERY_STATUS_FULL_CHARGE\n"); 1019 printf("---\n"); 1020 } 1021 #endif 1022 1023 #ifdef HAVE_BTSTACK_STDIN 1024 static void stdin_process(char cmd){ 1025 uint8_t status = ERROR_CODE_SUCCESS; 1026 uint8_t volume; 1027 avrcp_battery_status_t old_battery_status; 1028 1029 a2dp_sink_demo_stream_endpoint_t * stream_endpoint = &a2dp_sink_demo_stream_endpoint; 1030 a2dp_sink_demo_a2dp_connection_t * a2dp_connection = &a2dp_sink_demo_a2dp_connection; 1031 a2dp_sink_demo_avrcp_connection_t * avrcp_connection = &a2dp_sink_demo_avrcp_connection; 1032 1033 switch (cmd){ 1034 case 'b': 1035 status = a2dp_sink_establish_stream(device_addr, stream_endpoint->a2dp_local_seid, &a2dp_connection->a2dp_cid); 1036 printf(" - Create AVDTP connection to addr %s, and local seid %d, cid 0x%02x.\n", 1037 bd_addr_to_str(device_addr), a2dp_connection->a2dp_local_seid, a2dp_connection->a2dp_cid); 1038 break; 1039 case 'B': 1040 printf(" - AVDTP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 1041 a2dp_sink_disconnect(a2dp_connection->a2dp_cid); 1042 break; 1043 case 'c': 1044 printf(" - Create AVRCP connection to addr %s.\n", bd_addr_to_str(device_addr)); 1045 status = avrcp_connect(device_addr, &avrcp_connection->avrcp_cid); 1046 break; 1047 case 'C': 1048 printf(" - AVRCP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 1049 status = avrcp_disconnect(avrcp_connection->avrcp_cid); 1050 break; 1051 1052 case '\n': 1053 case '\r': 1054 break; 1055 case 'w': 1056 printf("Send delay report\n"); 1057 avdtp_sink_delay_report(a2dp_connection->a2dp_cid, a2dp_connection->a2dp_local_seid, 100); 1058 break; 1059 // Volume Control 1060 case 't': 1061 volume_percentage = volume_percentage <= 90 ? volume_percentage + 10 : 100; 1062 volume = volume_percentage * 127 / 100; 1063 printf(" - volume up for 10 percent, %d%% (%d) \n", volume_percentage, volume); 1064 status = avrcp_target_volume_changed(avrcp_connection->avrcp_cid, volume); 1065 avrcp_volume_changed(volume); 1066 break; 1067 case 'T': 1068 volume_percentage = volume_percentage >= 10 ? volume_percentage - 10 : 0; 1069 volume = volume_percentage * 127 / 100; 1070 printf(" - volume down for 10 percent, %d%% (%d) \n", volume_percentage, volume); 1071 status = avrcp_target_volume_changed(avrcp_connection->avrcp_cid, volume); 1072 avrcp_volume_changed(volume); 1073 break; 1074 case 'V': 1075 old_battery_status = battery_status; 1076 1077 if (battery_status < AVRCP_BATTERY_STATUS_FULL_CHARGE){ 1078 battery_status = (avrcp_battery_status_t)((uint8_t) battery_status + 1); 1079 } else { 1080 battery_status = AVRCP_BATTERY_STATUS_NORMAL; 1081 } 1082 printf(" - toggle battery value, old %d, new %d\n", old_battery_status, battery_status); 1083 status = avrcp_target_battery_status_changed(avrcp_connection->avrcp_cid, battery_status); 1084 break; 1085 case 'O': 1086 printf(" - get play status\n"); 1087 status = avrcp_controller_get_play_status(avrcp_connection->avrcp_cid); 1088 break; 1089 case 'j': 1090 printf(" - get now playing info\n"); 1091 status = avrcp_controller_get_now_playing_info(avrcp_connection->avrcp_cid); 1092 break; 1093 case 'k': 1094 printf(" - play\n"); 1095 status = avrcp_controller_play(avrcp_connection->avrcp_cid); 1096 break; 1097 case 'K': 1098 printf(" - stop\n"); 1099 status = avrcp_controller_stop(avrcp_connection->avrcp_cid); 1100 break; 1101 case 'L': 1102 printf(" - pause\n"); 1103 status = avrcp_controller_pause(avrcp_connection->avrcp_cid); 1104 break; 1105 case 'u': 1106 printf(" - start fast forward\n"); 1107 status = avrcp_controller_press_and_hold_fast_forward(avrcp_connection->avrcp_cid); 1108 break; 1109 case 'U': 1110 printf(" - stop fast forward\n"); 1111 status = avrcp_controller_release_press_and_hold_cmd(avrcp_connection->avrcp_cid); 1112 break; 1113 case 'n': 1114 printf(" - start rewind\n"); 1115 status = avrcp_controller_press_and_hold_rewind(avrcp_connection->avrcp_cid); 1116 break; 1117 case 'N': 1118 printf(" - stop rewind\n"); 1119 status = avrcp_controller_release_press_and_hold_cmd(avrcp_connection->avrcp_cid); 1120 break; 1121 case 'i': 1122 printf(" - forward\n"); 1123 status = avrcp_controller_forward(avrcp_connection->avrcp_cid); 1124 break; 1125 case 'I': 1126 printf(" - backward\n"); 1127 status = avrcp_controller_backward(avrcp_connection->avrcp_cid); 1128 break; 1129 case 'M': 1130 printf(" - mute\n"); 1131 status = avrcp_controller_mute(avrcp_connection->avrcp_cid); 1132 break; 1133 case 'r': 1134 printf(" - skip\n"); 1135 status = avrcp_controller_skip(avrcp_connection->avrcp_cid); 1136 break; 1137 case 'q': 1138 printf(" - query repeat and shuffle mode\n"); 1139 status = avrcp_controller_query_shuffle_and_repeat_modes(avrcp_connection->avrcp_cid); 1140 break; 1141 case 'v': 1142 printf(" - repeat single track\n"); 1143 status = avrcp_controller_set_repeat_mode(avrcp_connection->avrcp_cid, AVRCP_REPEAT_MODE_SINGLE_TRACK); 1144 break; 1145 case 'x': 1146 printf(" - repeat all tracks\n"); 1147 status = avrcp_controller_set_repeat_mode(avrcp_connection->avrcp_cid, AVRCP_REPEAT_MODE_ALL_TRACKS); 1148 break; 1149 case 'X': 1150 printf(" - disable repeat mode\n"); 1151 status = avrcp_controller_set_repeat_mode(avrcp_connection->avrcp_cid, AVRCP_REPEAT_MODE_OFF); 1152 break; 1153 case 'z': 1154 printf(" - shuffle all tracks\n"); 1155 status = avrcp_controller_set_shuffle_mode(avrcp_connection->avrcp_cid, AVRCP_SHUFFLE_MODE_ALL_TRACKS); 1156 break; 1157 case 'Z': 1158 printf(" - disable shuffle mode\n"); 1159 status = avrcp_controller_set_shuffle_mode(avrcp_connection->avrcp_cid, AVRCP_SHUFFLE_MODE_OFF); 1160 break; 1161 case 'a': 1162 printf("AVRCP: enable notification TRACK_CHANGED\n"); 1163 status = avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1164 break; 1165 case 'A': 1166 printf("AVRCP: disable notification TRACK_CHANGED\n"); 1167 status = avrcp_controller_disable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1168 break; 1169 case 'R': 1170 printf("AVRCP: enable notification PLAYBACK_POS_CHANGED\n"); 1171 status = avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 1172 break; 1173 case 'P': 1174 printf("AVRCP: disable notification PLAYBACK_POS_CHANGED\n"); 1175 status = avrcp_controller_disable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 1176 break; 1177 case 's': 1178 printf("AVRCP: send long button press REWIND\n"); 1179 status = avrcp_controller_start_press_and_hold_cmd(avrcp_connection->avrcp_cid, AVRCP_OPERATION_ID_REWIND); 1180 break; 1181 case 'S': 1182 printf("AVRCP: release long button press REWIND\n"); 1183 status = avrcp_controller_release_press_and_hold_cmd(avrcp_connection->avrcp_cid); 1184 break; 1185 default: 1186 show_usage(); 1187 return; 1188 } 1189 if (status != ERROR_CODE_SUCCESS){ 1190 printf("Could not perform command, status 0x%02x\n", status); 1191 } 1192 } 1193 #endif 1194 1195 int btstack_main(int argc, const char * argv[]); 1196 int btstack_main(int argc, const char * argv[]){ 1197 UNUSED(argc); 1198 (void)argv; 1199 1200 setup_demo(); 1201 1202 #ifdef HAVE_BTSTACK_STDIN 1203 // parse human-readable Bluetooth address 1204 sscanf_bd_addr(device_addr_string, device_addr); 1205 btstack_stdin_setup(stdin_process); 1206 #endif 1207 1208 // turn on! 1209 printf("Starting BTstack ...\n"); 1210 hci_power_control(HCI_POWER_ON); 1211 return 0; 1212 } 1213 /* EXAMPLE_END */ 1214