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 72 #include "btstack_resample.h" 73 74 //#define AVRCP_BROWSING_ENABLED 75 76 #ifdef HAVE_BTSTACK_STDIN 77 #include "btstack_stdin.h" 78 #endif 79 80 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 81 #include "btstack_sample_rate_compensation.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_WAV_FILE 89 #ifdef _MSC_VER 90 // ignore deprecated warning for fopen 91 #pragma warning(disable : 4996) 92 #endif 93 #endif 94 95 #define NUM_CHANNELS 2 96 #define BYTES_PER_FRAME (2*NUM_CHANNELS) 97 #define MAX_SBC_FRAME_SIZE 120 98 99 #ifdef HAVE_BTSTACK_STDIN 100 static const char * device_addr_string = "00:1B:DC:08:E2:72"; // pts v5.0 101 static bd_addr_t device_addr; 102 #endif 103 104 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 105 static btstack_sample_rate_compensation_t sample_rate_compensation; 106 #endif 107 108 static btstack_packet_callback_registration_t hci_event_callback_registration; 109 110 static uint8_t sdp_avdtp_sink_service_buffer[150]; 111 static uint8_t sdp_avrcp_target_service_buffer[150]; 112 static uint8_t sdp_avrcp_controller_service_buffer[200]; 113 static uint8_t device_id_sdp_service_buffer[100]; 114 115 // we support all configurations with bitpool 2-53 116 static uint8_t media_sbc_codec_capabilities[] = { 117 0xFF,//(AVDTP_SBC_44100 << 4) | AVDTP_SBC_STEREO, 118 0xFF,//(AVDTP_SBC_BLOCK_LENGTH_16 << 4) | (AVDTP_SBC_SUBBANDS_8 << 2) | AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS, 119 2, 53 120 }; 121 122 // WAV File 123 #ifdef STORE_TO_WAV_FILE 124 static uint32_t audio_frame_count = 0; 125 static char * wav_filename = "a2dp_sink_demo.wav"; 126 #endif 127 128 // SBC Decoder for WAV file or live playback 129 static const btstack_sbc_decoder_t * sbc_decoder_instance; 130 static btstack_sbc_decoder_bluedroid_t sbc_decoder_context; 131 132 // ring buffer for SBC Frames 133 // below 30: add samples, 30-40: fine, above 40: drop samples 134 #define OPTIMAL_FRAMES_MIN 60 135 #define OPTIMAL_FRAMES_MAX 80 136 #define ADDITIONAL_FRAMES 30 137 static uint8_t sbc_frame_storage[(OPTIMAL_FRAMES_MAX + ADDITIONAL_FRAMES) * MAX_SBC_FRAME_SIZE]; 138 static btstack_ring_buffer_t sbc_frame_ring_buffer; 139 static unsigned int sbc_frame_size; 140 141 // overflow buffer for not fully used sbc frames, with additional frames for resampling 142 static uint8_t decoded_audio_storage[(128+16) * BYTES_PER_FRAME]; 143 static btstack_ring_buffer_t decoded_audio_ring_buffer; 144 145 static int media_initialized = 0; 146 static int audio_stream_started; 147 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 148 static int l2cap_stream_started; 149 #endif 150 static btstack_resample_t resample_instance; 151 152 // temp storage of lower-layer request for audio samples 153 static int16_t * request_buffer; 154 static int request_frames; 155 156 // sink state 157 static int volume_percentage = 0; 158 static avrcp_battery_status_t battery_status = AVRCP_BATTERY_STATUS_WARNING; 159 160 #ifdef ENABLE_AVRCP_COVER_ART 161 static char a2dp_sink_demo_image_handle[8]; 162 static avrcp_cover_art_client_t a2dp_sink_demo_cover_art_client; 163 static bool a2dp_sink_demo_cover_art_client_connected; 164 static uint16_t a2dp_sink_demo_cover_art_cid; 165 static uint8_t a2dp_sink_demo_ertm_buffer[2000]; 166 static l2cap_ertm_config_t a2dp_sink_demo_ertm_config = { 167 1, // ertm mandatory 168 2, // max transmit, some tests require > 1 169 2000, 170 12000, 171 512, // l2cap ertm mtu 172 2, 173 2, 174 1, // 16-bit FCS 175 }; 176 static bool a2dp_sink_cover_art_download_active; 177 static uint32_t a2dp_sink_cover_art_file_size; 178 #ifdef HAVE_POSIX_FILE_IO 179 static const char * a2dp_sink_demo_thumbnail_path = "cover.jpg"; 180 static FILE * a2dp_sink_cover_art_file; 181 #endif 182 #endif 183 184 typedef struct { 185 uint8_t reconfigure; 186 uint8_t num_channels; 187 uint16_t sampling_frequency; 188 uint8_t block_length; 189 uint8_t subbands; 190 uint8_t min_bitpool_value; 191 uint8_t max_bitpool_value; 192 btstack_sbc_channel_mode_t channel_mode; 193 btstack_sbc_allocation_method_t allocation_method; 194 } media_codec_configuration_sbc_t; 195 196 typedef enum { 197 STREAM_STATE_CLOSED, 198 STREAM_STATE_OPEN, 199 STREAM_STATE_PLAYING, 200 STREAM_STATE_PAUSED, 201 } stream_state_t; 202 203 typedef struct { 204 uint8_t a2dp_local_seid; 205 uint8_t media_sbc_codec_configuration[4]; 206 } a2dp_sink_demo_stream_endpoint_t; 207 static a2dp_sink_demo_stream_endpoint_t a2dp_sink_demo_stream_endpoint; 208 209 typedef struct { 210 bd_addr_t addr; 211 uint16_t a2dp_cid; 212 uint8_t a2dp_local_seid; 213 stream_state_t stream_state; 214 media_codec_configuration_sbc_t sbc_configuration; 215 } a2dp_sink_demo_a2dp_connection_t; 216 static a2dp_sink_demo_a2dp_connection_t a2dp_sink_demo_a2dp_connection; 217 218 typedef struct { 219 bd_addr_t addr; 220 uint16_t avrcp_cid; 221 bool playing; 222 uint16_t notifications_supported_by_target; 223 } a2dp_sink_demo_avrcp_connection_t; 224 static a2dp_sink_demo_avrcp_connection_t a2dp_sink_demo_avrcp_connection; 225 226 /* @section Main Application Setup 227 * 228 * @text The Listing MainConfiguration shows how to set up AD2P Sink and AVRCP services. 229 * Besides calling init() method for each service, you'll also need to register several packet handlers: 230 * - hci_packet_handler - handles legacy pairing, here by using fixed '0000' pin code. 231 * - 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). 232 * - 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. 233 * - avrcp_packet_handler - receives AVRCP connect/disconnect event. 234 * - avrcp_controller_packet_handler - receives answers for sent AVRCP commands. 235 * - avrcp_target_packet_handler - receives AVRCP commands, and registered notifications. 236 * - 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. 237 * 238 * @text To announce A2DP Sink and AVRCP services, you need to create corresponding 239 * SDP records and register them with the SDP service. 240 * 241 * @text Note, currently only the SBC codec is supported. 242 * If you want to store the audio data in a file, you'll need to define STORE_TO_WAV_FILE. 243 * 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. 244 * The initialization of the SBC decoder requires a callback that handles PCM data: 245 * - 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. 246 */ 247 248 /* LISTING_START(MainConfiguration): Setup Audio Sink and AVRCP services */ 249 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 250 static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * packet, uint16_t event_size); 251 static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size); 252 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 253 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 254 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 255 #ifdef HAVE_BTSTACK_STDIN 256 static void stdin_process(char cmd); 257 #endif 258 259 static int setup_demo(void){ 260 261 // init protocols 262 l2cap_init(); 263 sdp_init(); 264 #ifdef ENABLE_BLE 265 // Initialize LE Security Manager. Needed for cross-transport key derivation 266 sm_init(); 267 #endif 268 #ifdef ENABLE_AVRCP_COVER_ART 269 goep_client_init(); 270 avrcp_cover_art_client_init(); 271 #endif 272 273 // Init profiles 274 a2dp_sink_init(); 275 avrcp_init(); 276 avrcp_controller_init(); 277 avrcp_target_init(); 278 279 280 // Configure A2DP Sink 281 a2dp_sink_register_packet_handler(&a2dp_sink_packet_handler); 282 a2dp_sink_register_media_handler(&handle_l2cap_media_data_packet); 283 a2dp_sink_demo_stream_endpoint_t * stream_endpoint = &a2dp_sink_demo_stream_endpoint; 284 avdtp_stream_endpoint_t * local_stream_endpoint = a2dp_sink_create_stream_endpoint(AVDTP_AUDIO, 285 AVDTP_CODEC_SBC, media_sbc_codec_capabilities, sizeof(media_sbc_codec_capabilities), 286 stream_endpoint->media_sbc_codec_configuration, sizeof(stream_endpoint->media_sbc_codec_configuration)); 287 btstack_assert(local_stream_endpoint != NULL); 288 // - Store stream enpoint's SEP ID, as it is used by A2DP API to identify the stream endpoint 289 stream_endpoint->a2dp_local_seid = avdtp_local_seid(local_stream_endpoint); 290 291 292 // Configure AVRCP Controller + Target 293 avrcp_register_packet_handler(&avrcp_packet_handler); 294 avrcp_controller_register_packet_handler(&avrcp_controller_packet_handler); 295 avrcp_target_register_packet_handler(&avrcp_target_packet_handler); 296 297 298 // Configure SDP 299 300 // - Create and register A2DP Sink service record 301 memset(sdp_avdtp_sink_service_buffer, 0, sizeof(sdp_avdtp_sink_service_buffer)); 302 a2dp_sink_create_sdp_record(sdp_avdtp_sink_service_buffer, sdp_create_service_record_handle(), 303 AVDTP_SINK_FEATURE_MASK_HEADPHONE, NULL, NULL); 304 btstack_assert(de_get_len( sdp_avdtp_sink_service_buffer) <= sizeof(sdp_avdtp_sink_service_buffer)); 305 sdp_register_service(sdp_avdtp_sink_service_buffer); 306 307 // - Create AVRCP Controller service record and register it with SDP. We send Category 1 commands to the media player, e.g. play/pause 308 memset(sdp_avrcp_controller_service_buffer, 0, sizeof(sdp_avrcp_controller_service_buffer)); 309 uint16_t controller_supported_features = 1 << AVRCP_CONTROLLER_SUPPORTED_FEATURE_CATEGORY_PLAYER_OR_RECORDER; 310 #ifdef AVRCP_BROWSING_ENABLED 311 controller_supported_features |= 1 << AVRCP_CONTROLLER_SUPPORTED_FEATURE_BROWSING; 312 #endif 313 #ifdef ENABLE_AVRCP_COVER_ART 314 controller_supported_features |= 1 << AVRCP_CONTROLLER_SUPPORTED_FEATURE_COVER_ART_GET_LINKED_THUMBNAIL; 315 #endif 316 avrcp_controller_create_sdp_record(sdp_avrcp_controller_service_buffer, sdp_create_service_record_handle(), 317 controller_supported_features, NULL, NULL); 318 btstack_assert(de_get_len( sdp_avrcp_controller_service_buffer) <= sizeof(sdp_avrcp_controller_service_buffer)); 319 sdp_register_service(sdp_avrcp_controller_service_buffer); 320 321 // - Create and register A2DP Sink service record 322 // - We receive Category 2 commands from the media player, e.g. volume up/down 323 memset(sdp_avrcp_target_service_buffer, 0, sizeof(sdp_avrcp_target_service_buffer)); 324 uint16_t target_supported_features = 1 << AVRCP_TARGET_SUPPORTED_FEATURE_CATEGORY_MONITOR_OR_AMPLIFIER; 325 avrcp_target_create_sdp_record(sdp_avrcp_target_service_buffer, 326 sdp_create_service_record_handle(), target_supported_features, NULL, NULL); 327 btstack_assert(de_get_len( sdp_avrcp_target_service_buffer) <= sizeof(sdp_avrcp_target_service_buffer)); 328 sdp_register_service(sdp_avrcp_target_service_buffer); 329 330 // - Create and register Device ID (PnP) service record 331 memset(device_id_sdp_service_buffer, 0, sizeof(device_id_sdp_service_buffer)); 332 device_id_create_sdp_record(device_id_sdp_service_buffer, 333 sdp_create_service_record_handle(), DEVICE_ID_VENDOR_ID_SOURCE_BLUETOOTH, BLUETOOTH_COMPANY_ID_BLUEKITCHEN_GMBH, 1, 1); 334 btstack_assert(de_get_len( device_id_sdp_service_buffer) <= sizeof(device_id_sdp_service_buffer)); 335 sdp_register_service(device_id_sdp_service_buffer); 336 337 338 // Configure GAP - discovery / connection 339 340 // - Set local name with a template Bluetooth address, that will be automatically 341 // replaced with an actual address once it is available, i.e. when BTstack boots 342 // up and starts talking to a Bluetooth module. 343 gap_set_local_name("A2DP Sink Demo 00:00:00:00:00:00"); 344 345 // - Allow to show up in Bluetooth inquiry 346 gap_discoverable_control(1); 347 348 // - Set Class of Device - Service Class: Audio, Major Device Class: Audio, Minor: Headphone 349 gap_set_class_of_device(0x200404); 350 351 // - Allow for role switch in general and sniff mode 352 gap_set_default_link_policy_settings( LM_LINK_POLICY_ENABLE_ROLE_SWITCH | LM_LINK_POLICY_ENABLE_SNIFF_MODE ); 353 354 // - Allow for role switch on outgoing connections 355 // - This allows A2DP Source, e.g. smartphone, to become master when we re-connect to it. 356 gap_set_allow_role_switch(true); 357 358 359 // Register for HCI events 360 hci_event_callback_registration.callback = &hci_packet_handler; 361 hci_add_event_handler(&hci_event_callback_registration); 362 363 // Inform about audio playback / test options 364 #ifdef HAVE_POSIX_FILE_IO 365 if (!btstack_audio_sink_get_instance()){ 366 printf("No audio playback.\n"); 367 } else { 368 printf("Audio playback supported.\n"); 369 } 370 #ifdef STORE_TO_WAV_FILE 371 printf("Audio will be stored to \'%s\' file.\n", wav_filename); 372 #endif 373 #endif 374 return 0; 375 } 376 /* LISTING_END */ 377 378 379 static void playback_handler(int16_t * buffer, uint16_t num_audio_frames){ 380 381 #ifdef STORE_TO_WAV_FILE 382 int wav_samples = num_audio_frames * NUM_CHANNELS; 383 int16_t * wav_buffer = buffer; 384 #endif 385 386 // called from lower-layer but guaranteed to be on main thread 387 if (sbc_frame_size == 0){ 388 memset(buffer, 0, num_audio_frames * BYTES_PER_FRAME); 389 return; 390 } 391 392 // first fill from resampled audio 393 uint32_t bytes_read; 394 btstack_ring_buffer_read(&decoded_audio_ring_buffer, (uint8_t *) buffer, num_audio_frames * BYTES_PER_FRAME, &bytes_read); 395 buffer += bytes_read / NUM_CHANNELS; 396 num_audio_frames -= bytes_read / BYTES_PER_FRAME; 397 398 // then start decoding sbc frames using request_* globals 399 request_buffer = buffer; 400 request_frames = num_audio_frames; 401 while (request_frames && btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) >= sbc_frame_size){ 402 // decode frame 403 uint8_t sbc_frame[MAX_SBC_FRAME_SIZE]; 404 btstack_ring_buffer_read(&sbc_frame_ring_buffer, sbc_frame, sbc_frame_size, &bytes_read); 405 sbc_decoder_instance->decode_signed_16(&sbc_decoder_context, 0, sbc_frame, sbc_frame_size); 406 } 407 408 #ifdef STORE_TO_WAV_FILE 409 audio_frame_count += num_audio_frames; 410 wav_writer_write_int16(wav_samples, wav_buffer); 411 #endif 412 } 413 414 static void handle_pcm_data(int16_t * data, int num_audio_frames, int num_channels, int sample_rate, void * context){ 415 UNUSED(sample_rate); 416 UNUSED(context); 417 UNUSED(num_channels); // must be stereo == 2 418 419 const btstack_audio_sink_t * audio_sink = btstack_audio_sink_get_instance(); 420 if (!audio_sink){ 421 #ifdef STORE_TO_WAV_FILE 422 audio_frame_count += num_audio_frames; 423 wav_writer_write_int16(num_audio_frames * NUM_CHANNELS, data); 424 #endif 425 return; 426 } 427 428 // resample into request buffer - add some additional space for resampling 429 int16_t output_buffer[(128+16) * NUM_CHANNELS]; // 16 * 8 * 2 430 uint32_t resampled_frames = btstack_resample_block(&resample_instance, data, num_audio_frames, output_buffer); 431 432 // store data in btstack_audio buffer first 433 int frames_to_copy = btstack_min(resampled_frames, request_frames); 434 memcpy(request_buffer, output_buffer, frames_to_copy * BYTES_PER_FRAME); 435 request_frames -= frames_to_copy; 436 request_buffer += frames_to_copy * NUM_CHANNELS; 437 438 // and rest in ring buffer 439 int frames_to_store = resampled_frames - frames_to_copy; 440 if (frames_to_store){ 441 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); 442 if (status){ 443 printf("Error storing samples in PCM ring buffer!!!\n"); 444 } 445 } 446 } 447 448 static int media_processing_init(media_codec_configuration_sbc_t * configuration){ 449 if (media_initialized) return 0; 450 sbc_decoder_instance = btstack_sbc_decoder_bluedroid_init_instance(&sbc_decoder_context); 451 sbc_decoder_instance->configure(&sbc_decoder_context, SBC_MODE_STANDARD, handle_pcm_data, NULL); 452 453 #ifdef STORE_TO_WAV_FILE 454 wav_writer_open(wav_filename, configuration->num_channels, configuration->sampling_frequency); 455 #endif 456 457 btstack_ring_buffer_init(&sbc_frame_ring_buffer, sbc_frame_storage, sizeof(sbc_frame_storage)); 458 btstack_ring_buffer_init(&decoded_audio_ring_buffer, decoded_audio_storage, sizeof(decoded_audio_storage)); 459 btstack_resample_init(&resample_instance, configuration->num_channels); 460 461 // setup audio playback 462 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 463 if (audio){ 464 audio->init(NUM_CHANNELS, configuration->sampling_frequency, &playback_handler); 465 } 466 467 audio_stream_started = 0; 468 media_initialized = 1; 469 return 0; 470 } 471 472 static void media_processing_start(void){ 473 if (!media_initialized) return; 474 475 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 476 btstack_sample_rate_compensation_reset( &sample_rate_compensation, btstack_run_loop_get_time_ms() ); 477 #endif 478 // setup audio playback 479 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 480 if (audio){ 481 audio->start_stream(); 482 } 483 audio_stream_started = 1; 484 } 485 486 static void media_processing_pause(void){ 487 if (!media_initialized) return; 488 489 // stop audio playback 490 audio_stream_started = 0; 491 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 492 l2cap_stream_started = 0; 493 #endif 494 495 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 496 if (audio){ 497 audio->stop_stream(); 498 } 499 // discard pending data 500 btstack_ring_buffer_reset(&decoded_audio_ring_buffer); 501 btstack_ring_buffer_reset(&sbc_frame_ring_buffer); 502 } 503 504 static void media_processing_close(void){ 505 if (!media_initialized) return; 506 507 media_initialized = 0; 508 audio_stream_started = 0; 509 sbc_frame_size = 0; 510 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 511 l2cap_stream_started = 0; 512 #endif 513 514 #ifdef STORE_TO_WAV_FILE 515 wav_writer_close(); 516 uint32_t total_frames_nr = sbc_decoder_context.good_frames_nr + sbc_decoder_context.bad_frames_nr + sbc_decoder_context.zero_frames_nr; 517 518 printf("WAV Writer: Decoding done. Processed %u SBC frames:\n - %d good\n - %d bad\n", total_frames_nr, sbc_decoder_context.good_frames_nr, total_frames_nr - sbc_decoder_context.good_frames_nr); 519 printf("WAV Writer: Wrote %u audio frames to wav file: %s\n", audio_frame_count, wav_filename); 520 #endif 521 522 // stop audio playback 523 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 524 if (audio){ 525 printf("close stream\n"); 526 audio->close(); 527 } 528 } 529 530 /* @section Handle Media Data Packet 531 * 532 * @text Here the audio data, are received through the handle_l2cap_media_data_packet callback. 533 * Currently, only the SBC media codec is supported. Hence, the media data consists of the media packet header and the SBC packet. 534 * 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). 535 * If the audio stream wasn't started already and there are enough SBC frames in the ring buffer, start playback. 536 */ 537 538 static int read_media_data_header(uint8_t * packet, int size, int * offset, avdtp_media_packet_header_t * media_header); 539 static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header); 540 541 static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size){ 542 UNUSED(seid); 543 int pos = 0; 544 545 avdtp_media_packet_header_t media_header; 546 if (!read_media_data_header(packet, size, &pos, &media_header)) return; 547 548 avdtp_sbc_codec_header_t sbc_header; 549 if (!read_sbc_header(packet, size, &pos, &sbc_header)) return; 550 551 int packet_length = size-pos; 552 uint8_t *packet_begin = packet+pos; 553 554 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 555 // process data right away if there's no audio implementation active, e.g. on posix systems to store as .wav 556 if (!audio){ 557 sbc_decoder_instance->decode_signed_16(&sbc_decoder_context, 0, packet_begin, packet_length); 558 return; 559 } 560 561 // store sbc frame size for buffer management 562 sbc_frame_size = packet_length / sbc_header.num_frames; 563 int status = btstack_ring_buffer_write(&sbc_frame_ring_buffer, packet_begin, packet_length); 564 if (status != ERROR_CODE_SUCCESS){ 565 printf("Error storing samples in SBC ring buffer!!!\n"); 566 } 567 568 // decide on audio sync drift based on number of sbc frames in queue 569 int sbc_frames_in_buffer = btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) / sbc_frame_size; 570 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 571 if( !l2cap_stream_started && audio_stream_started ) { 572 l2cap_stream_started = 1; 573 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) ); 574 } 575 // update sample rate compensation 576 if( audio_stream_started && (audio != NULL)) { 577 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() ); 578 btstack_resample_set_factor(&resample_instance, resampling_factor); 579 // printf("sbc buffer level : %"PRIu32"\n", btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer)); 580 } 581 #else 582 uint32_t resampling_factor; 583 584 // nominal factor (fixed-point 2^16) and compensation offset 585 uint32_t nominal_factor = 0x10000; 586 uint32_t compensation = 0x00100; 587 588 if (sbc_frames_in_buffer < OPTIMAL_FRAMES_MIN){ 589 resampling_factor = nominal_factor - compensation; // stretch samples 590 } else if (sbc_frames_in_buffer <= OPTIMAL_FRAMES_MAX){ 591 resampling_factor = nominal_factor; // nothing to do 592 } else { 593 resampling_factor = nominal_factor + compensation; // compress samples 594 } 595 596 btstack_resample_set_factor(&resample_instance, resampling_factor); 597 #endif 598 // start stream if enough frames buffered 599 if (!audio_stream_started && sbc_frames_in_buffer >= OPTIMAL_FRAMES_MIN){ 600 media_processing_start(); 601 } 602 } 603 604 static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header){ 605 int sbc_header_len = 12; // without crc 606 int pos = *offset; 607 608 if (size - pos < sbc_header_len){ 609 printf("Not enough data to read SBC header, expected %d, received %d\n", sbc_header_len, size-pos); 610 return 0; 611 } 612 613 sbc_header->fragmentation = get_bit16(packet[pos], 7); 614 sbc_header->starting_packet = get_bit16(packet[pos], 6); 615 sbc_header->last_packet = get_bit16(packet[pos], 5); 616 sbc_header->num_frames = packet[pos] & 0x0f; 617 pos++; 618 *offset = pos; 619 return 1; 620 } 621 622 static int read_media_data_header(uint8_t *packet, int size, int *offset, avdtp_media_packet_header_t *media_header){ 623 int media_header_len = 12; // without crc 624 int pos = *offset; 625 626 if (size - pos < media_header_len){ 627 printf("Not enough data to read media packet header, expected %d, received %d\n", media_header_len, size-pos); 628 return 0; 629 } 630 631 media_header->version = packet[pos] & 0x03; 632 media_header->padding = get_bit16(packet[pos],2); 633 media_header->extension = get_bit16(packet[pos],3); 634 media_header->csrc_count = (packet[pos] >> 4) & 0x0F; 635 pos++; 636 637 media_header->marker = get_bit16(packet[pos],0); 638 media_header->payload_type = (packet[pos] >> 1) & 0x7F; 639 pos++; 640 641 media_header->sequence_number = big_endian_read_16(packet, pos); 642 pos+=2; 643 644 media_header->timestamp = big_endian_read_32(packet, pos); 645 pos+=4; 646 647 media_header->synchronization_source = big_endian_read_32(packet, pos); 648 pos+=4; 649 *offset = pos; 650 return 1; 651 } 652 653 static void dump_sbc_configuration(media_codec_configuration_sbc_t * configuration){ 654 printf(" - num_channels: %d\n", configuration->num_channels); 655 printf(" - sampling_frequency: %d\n", configuration->sampling_frequency); 656 printf(" - channel_mode: %d\n", configuration->channel_mode); 657 printf(" - block_length: %d\n", configuration->block_length); 658 printf(" - subbands: %d\n", configuration->subbands); 659 printf(" - allocation_method: %d\n", configuration->allocation_method); 660 printf(" - bitpool_value [%d, %d] \n", configuration->min_bitpool_value, configuration->max_bitpool_value); 661 printf("\n"); 662 } 663 664 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 665 UNUSED(channel); 666 UNUSED(size); 667 if (packet_type != HCI_EVENT_PACKET) return; 668 if (hci_event_packet_get_type(packet) == HCI_EVENT_PIN_CODE_REQUEST) { 669 bd_addr_t address; 670 printf("Pin code request - using '0000'\n"); 671 hci_event_pin_code_request_get_bd_addr(packet, address); 672 gap_pin_code_response(address, "0000"); 673 } 674 } 675 676 #ifdef ENABLE_AVRCP_COVER_ART 677 static void a2dp_sink_demo_cover_art_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) { 678 UNUSED(channel); 679 UNUSED(size); 680 uint8_t status; 681 uint16_t cid; 682 switch (packet_type){ 683 case BIP_DATA_PACKET: 684 if (a2dp_sink_cover_art_download_active){ 685 a2dp_sink_cover_art_file_size += size; 686 #ifdef HAVE_POSIX_FILE_IO 687 fwrite(packet, 1, size, a2dp_sink_cover_art_file); 688 #else 689 printf("Cover art : TODO - store %u bytes image data\n", size); 690 #endif 691 } else { 692 uint16_t i; 693 for (i=0;i<size;i++){ 694 putchar(packet[i]); 695 } 696 printf("\n"); 697 } 698 break; 699 case HCI_EVENT_PACKET: 700 switch (hci_event_packet_get_type(packet)){ 701 case HCI_EVENT_AVRCP_META: 702 switch (hci_event_avrcp_meta_get_subevent_code(packet)){ 703 case AVRCP_SUBEVENT_COVER_ART_CONNECTION_ESTABLISHED: 704 status = avrcp_subevent_cover_art_connection_established_get_status(packet); 705 cid = avrcp_subevent_cover_art_connection_established_get_cover_art_cid(packet); 706 if (status == ERROR_CODE_SUCCESS){ 707 printf("Cover Art : connection established, cover art cid 0x%02x\n", cid); 708 a2dp_sink_demo_cover_art_client_connected = true; 709 } else { 710 printf("Cover Art : connection failed, status 0x%02x\n", status); 711 a2dp_sink_demo_cover_art_cid = 0; 712 } 713 break; 714 case AVRCP_SUBEVENT_COVER_ART_OPERATION_COMPLETE: 715 if (a2dp_sink_cover_art_download_active){ 716 a2dp_sink_cover_art_download_active = false; 717 #ifdef HAVE_POSIX_FILE_IO 718 printf("Cover Art : download of '%s complete, size %u bytes'\n", 719 a2dp_sink_demo_thumbnail_path, a2dp_sink_cover_art_file_size); 720 fclose(a2dp_sink_cover_art_file); 721 a2dp_sink_cover_art_file = NULL; 722 #else 723 printf("Cover Art: download completed\n"); 724 #endif 725 } 726 break; 727 case AVRCP_SUBEVENT_COVER_ART_CONNECTION_RELEASED: 728 a2dp_sink_demo_cover_art_client_connected = false; 729 a2dp_sink_demo_cover_art_cid = 0; 730 printf("Cover Art : connection released 0x%02x\n", 731 avrcp_subevent_cover_art_connection_released_get_cover_art_cid(packet)); 732 break; 733 default: 734 break; 735 } 736 break; 737 default: 738 break; 739 } 740 break; 741 default: 742 break; 743 } 744 } 745 746 static uint8_t a2dp_sink_demo_cover_art_connect(void) { 747 uint8_t status; 748 status = avrcp_cover_art_client_connect(&a2dp_sink_demo_cover_art_client, a2dp_sink_demo_cover_art_packet_handler, 749 device_addr, a2dp_sink_demo_ertm_buffer, 750 sizeof(a2dp_sink_demo_ertm_buffer), &a2dp_sink_demo_ertm_config, 751 &a2dp_sink_demo_cover_art_cid); 752 return status; 753 } 754 #endif 755 756 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 757 UNUSED(channel); 758 UNUSED(size); 759 uint16_t local_cid; 760 uint8_t status; 761 bd_addr_t address; 762 763 a2dp_sink_demo_avrcp_connection_t * connection = &a2dp_sink_demo_avrcp_connection; 764 765 if (packet_type != HCI_EVENT_PACKET) return; 766 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 767 switch (packet[2]){ 768 case AVRCP_SUBEVENT_CONNECTION_ESTABLISHED: { 769 local_cid = avrcp_subevent_connection_established_get_avrcp_cid(packet); 770 status = avrcp_subevent_connection_established_get_status(packet); 771 if (status != ERROR_CODE_SUCCESS){ 772 printf("AVRCP: Connection failed, status 0x%02x\n", status); 773 connection->avrcp_cid = 0; 774 return; 775 } 776 777 connection->avrcp_cid = local_cid; 778 avrcp_subevent_connection_established_get_bd_addr(packet, address); 779 printf("AVRCP: Connected to %s, cid 0x%02x\n", bd_addr_to_str(address), connection->avrcp_cid); 780 781 #ifdef HAVE_BTSTACK_STDIN 782 // use address for outgoing connections 783 avrcp_subevent_connection_established_get_bd_addr(packet, device_addr); 784 #endif 785 786 avrcp_target_support_event(connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED); 787 avrcp_target_support_event(connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED); 788 avrcp_target_battery_status_changed(connection->avrcp_cid, battery_status); 789 790 // query supported events: 791 avrcp_controller_get_supported_events(connection->avrcp_cid); 792 return; 793 } 794 795 case AVRCP_SUBEVENT_CONNECTION_RELEASED: 796 printf("AVRCP: Channel released: cid 0x%02x\n", avrcp_subevent_connection_released_get_avrcp_cid(packet)); 797 connection->avrcp_cid = 0; 798 connection->notifications_supported_by_target = 0; 799 return; 800 default: 801 break; 802 } 803 } 804 805 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 806 UNUSED(channel); 807 UNUSED(size); 808 809 // helper to print c strings 810 uint8_t avrcp_subevent_value[256]; 811 uint8_t play_status; 812 uint8_t event_id; 813 814 a2dp_sink_demo_avrcp_connection_t * avrcp_connection = &a2dp_sink_demo_avrcp_connection; 815 816 if (packet_type != HCI_EVENT_PACKET) return; 817 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 818 if (avrcp_connection->avrcp_cid == 0) return; 819 820 memset(avrcp_subevent_value, 0, sizeof(avrcp_subevent_value)); 821 switch (packet[2]){ 822 case AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID: 823 avrcp_connection->notifications_supported_by_target |= (1 << avrcp_subevent_get_capability_event_id_get_event_id(packet)); 824 break; 825 case AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID_DONE: 826 827 printf("AVRCP Controller: supported notifications by target:\n"); 828 for (event_id = (uint8_t) AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; event_id < (uint8_t) AVRCP_NOTIFICATION_EVENT_LAST_INDEX; event_id++){ 829 printf(" - [%s] %s\n", 830 (avrcp_connection->notifications_supported_by_target & (1 << event_id)) != 0 ? "X" : " ", 831 avrcp_notification2str((avrcp_notification_event_id_t)event_id)); 832 } 833 printf("\n\n"); 834 835 // automatically enable notifications 836 avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED); 837 avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED); 838 avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 839 840 #ifdef ENABLE_AVRCP_COVER_ART 841 // image handles become invalid on player change, registe for notifications 842 avrcp_controller_enable_notification(a2dp_sink_demo_avrcp_connection.avrcp_cid, AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED); 843 // trigger cover art client connection 844 a2dp_sink_demo_cover_art_connect(); 845 #endif 846 break; 847 848 case AVRCP_SUBEVENT_NOTIFICATION_STATE: 849 event_id = (avrcp_notification_event_id_t)avrcp_subevent_notification_state_get_event_id(packet); 850 printf("AVRCP Controller: %s notification registered\n", avrcp_notification2str(event_id)); 851 break; 852 853 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED: 854 printf("AVRCP Controller: Playback position changed, position %d ms\n", (unsigned int) avrcp_subevent_notification_playback_pos_changed_get_playback_position_ms(packet)); 855 break; 856 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_STATUS_CHANGED: 857 printf("AVRCP Controller: Playback status changed %s\n", avrcp_play_status2str(avrcp_subevent_notification_playback_status_changed_get_play_status(packet))); 858 play_status = avrcp_subevent_notification_playback_status_changed_get_play_status(packet); 859 switch (play_status){ 860 case AVRCP_PLAYBACK_STATUS_PLAYING: 861 avrcp_connection->playing = true; 862 break; 863 default: 864 avrcp_connection->playing = false; 865 break; 866 } 867 break; 868 869 case AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED: 870 printf("AVRCP Controller: Playing content changed\n"); 871 break; 872 873 case AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED: 874 printf("AVRCP Controller: Track changed\n"); 875 break; 876 877 case AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED: 878 printf("AVRCP Controller: Available Players Changed\n"); 879 break; 880 881 case AVRCP_SUBEVENT_SHUFFLE_AND_REPEAT_MODE:{ 882 uint8_t shuffle_mode = avrcp_subevent_shuffle_and_repeat_mode_get_shuffle_mode(packet); 883 uint8_t repeat_mode = avrcp_subevent_shuffle_and_repeat_mode_get_repeat_mode(packet); 884 printf("AVRCP Controller: %s, %s\n", avrcp_shuffle2str(shuffle_mode), avrcp_repeat2str(repeat_mode)); 885 break; 886 } 887 case AVRCP_SUBEVENT_NOW_PLAYING_TRACK_INFO: 888 printf("AVRCP Controller: Track %d\n", avrcp_subevent_now_playing_track_info_get_track(packet)); 889 break; 890 891 case AVRCP_SUBEVENT_NOW_PLAYING_TOTAL_TRACKS_INFO: 892 printf("AVRCP Controller: Total Tracks %d\n", avrcp_subevent_now_playing_total_tracks_info_get_total_tracks(packet)); 893 break; 894 895 case AVRCP_SUBEVENT_NOW_PLAYING_TITLE_INFO: 896 if (avrcp_subevent_now_playing_title_info_get_value_len(packet) > 0){ 897 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_title_info_get_value(packet), avrcp_subevent_now_playing_title_info_get_value_len(packet)); 898 printf("AVRCP Controller: Title %s\n", avrcp_subevent_value); 899 } 900 break; 901 902 case AVRCP_SUBEVENT_NOW_PLAYING_ARTIST_INFO: 903 if (avrcp_subevent_now_playing_artist_info_get_value_len(packet) > 0){ 904 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_artist_info_get_value(packet), avrcp_subevent_now_playing_artist_info_get_value_len(packet)); 905 printf("AVRCP Controller: Artist %s\n", avrcp_subevent_value); 906 } 907 break; 908 909 case AVRCP_SUBEVENT_NOW_PLAYING_ALBUM_INFO: 910 if (avrcp_subevent_now_playing_album_info_get_value_len(packet) > 0){ 911 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_album_info_get_value(packet), avrcp_subevent_now_playing_album_info_get_value_len(packet)); 912 printf("AVRCP Controller: Album %s\n", avrcp_subevent_value); 913 } 914 break; 915 916 case AVRCP_SUBEVENT_NOW_PLAYING_GENRE_INFO: 917 if (avrcp_subevent_now_playing_genre_info_get_value_len(packet) > 0){ 918 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_genre_info_get_value(packet), avrcp_subevent_now_playing_genre_info_get_value_len(packet)); 919 printf("AVRCP Controller: Genre %s\n", avrcp_subevent_value); 920 } 921 break; 922 923 case AVRCP_SUBEVENT_PLAY_STATUS: 924 printf("AVRCP Controller: Song length %"PRIu32" ms, Song position %"PRIu32" ms, Play status %s\n", 925 avrcp_subevent_play_status_get_song_length(packet), 926 avrcp_subevent_play_status_get_song_position(packet), 927 avrcp_play_status2str(avrcp_subevent_play_status_get_play_status(packet))); 928 break; 929 930 case AVRCP_SUBEVENT_OPERATION_COMPLETE: 931 printf("AVRCP Controller: %s complete\n", avrcp_operation2str(avrcp_subevent_operation_complete_get_operation_id(packet))); 932 break; 933 934 case AVRCP_SUBEVENT_OPERATION_START: 935 printf("AVRCP Controller: %s start\n", avrcp_operation2str(avrcp_subevent_operation_start_get_operation_id(packet))); 936 break; 937 938 case AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_END: 939 printf("AVRCP Controller: Track reached end\n"); 940 break; 941 942 case AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE: 943 printf("AVRCP Controller: Set Player App Value %s\n", avrcp_ctype2str(avrcp_subevent_player_application_value_response_get_command_type(packet))); 944 break; 945 946 #ifdef ENABLE_AVRCP_COVER_ART 947 case AVRCP_SUBEVENT_NOTIFICATION_EVENT_UIDS_CHANGED: 948 if (a2dp_sink_demo_cover_art_client_connected){ 949 printf("AVRCP Controller: UIDs changed -> disconnect cover art client\n"); 950 avrcp_cover_art_client_disconnect(a2dp_sink_demo_cover_art_cid); 951 } 952 break; 953 954 case AVRCP_SUBEVENT_NOW_PLAYING_COVER_ART_INFO: 955 if (avrcp_subevent_now_playing_cover_art_info_get_value_len(packet) == 7){ 956 memcpy(a2dp_sink_demo_image_handle, avrcp_subevent_now_playing_cover_art_info_get_value(packet), 7); 957 printf("AVRCP Controller: Cover Art %s\n", a2dp_sink_demo_image_handle); 958 } 959 break; 960 #endif 961 962 default: 963 break; 964 } 965 } 966 967 static void avrcp_volume_changed(uint8_t volume){ 968 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 969 if (audio){ 970 audio->set_volume(volume); 971 } 972 } 973 974 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 975 UNUSED(channel); 976 UNUSED(size); 977 978 if (packet_type != HCI_EVENT_PACKET) return; 979 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 980 981 uint8_t volume; 982 char const * button_state; 983 avrcp_operation_id_t operation_id; 984 985 switch (packet[2]){ 986 case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED: 987 volume = avrcp_subevent_notification_volume_changed_get_absolute_volume(packet); 988 volume_percentage = volume * 100 / 127; 989 printf("AVRCP Target : Volume set to %d%% (%d)\n", volume_percentage, volume); 990 avrcp_volume_changed(volume); 991 break; 992 993 case AVRCP_SUBEVENT_OPERATION: 994 operation_id = (avrcp_operation_id_t) avrcp_subevent_operation_get_operation_id(packet); 995 button_state = avrcp_subevent_operation_get_button_pressed(packet) > 0 ? "PRESS" : "RELEASE"; 996 switch (operation_id){ 997 case AVRCP_OPERATION_ID_VOLUME_UP: 998 printf("AVRCP Target : VOLUME UP (%s)\n", button_state); 999 break; 1000 case AVRCP_OPERATION_ID_VOLUME_DOWN: 1001 printf("AVRCP Target : VOLUME DOWN (%s)\n", button_state); 1002 break; 1003 default: 1004 return; 1005 } 1006 break; 1007 default: 1008 printf("AVRCP Target : Event 0x%02x is not parsed\n", packet[2]); 1009 break; 1010 } 1011 } 1012 1013 static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1014 UNUSED(channel); 1015 UNUSED(size); 1016 uint8_t status; 1017 1018 uint8_t allocation_method; 1019 1020 if (packet_type != HCI_EVENT_PACKET) return; 1021 if (hci_event_packet_get_type(packet) != HCI_EVENT_A2DP_META) return; 1022 1023 a2dp_sink_demo_a2dp_connection_t * a2dp_conn = &a2dp_sink_demo_a2dp_connection; 1024 1025 switch (packet[2]){ 1026 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 1027 printf("A2DP Sink : Received non SBC codec - not implemented\n"); 1028 break; 1029 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 1030 printf("A2DP Sink : Received SBC codec configuration\n"); 1031 a2dp_conn->sbc_configuration.reconfigure = a2dp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 1032 a2dp_conn->sbc_configuration.num_channels = a2dp_subevent_signaling_media_codec_sbc_configuration_get_num_channels(packet); 1033 a2dp_conn->sbc_configuration.sampling_frequency = a2dp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 1034 a2dp_conn->sbc_configuration.block_length = a2dp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 1035 a2dp_conn->sbc_configuration.subbands = a2dp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 1036 a2dp_conn->sbc_configuration.min_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 1037 a2dp_conn->sbc_configuration.max_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 1038 1039 allocation_method = a2dp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 1040 1041 // Adapt Bluetooth spec definition to SBC Encoder expected input 1042 a2dp_conn->sbc_configuration.allocation_method = (btstack_sbc_allocation_method_t)(allocation_method - 1); 1043 1044 switch (a2dp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet)){ 1045 case AVDTP_CHANNEL_MODE_JOINT_STEREO: 1046 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO; 1047 break; 1048 case AVDTP_CHANNEL_MODE_STEREO: 1049 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_STEREO; 1050 break; 1051 case AVDTP_CHANNEL_MODE_DUAL_CHANNEL: 1052 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_DUAL_CHANNEL; 1053 break; 1054 case AVDTP_CHANNEL_MODE_MONO: 1055 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_MONO; 1056 break; 1057 default: 1058 btstack_assert(false); 1059 break; 1060 } 1061 dump_sbc_configuration(&a2dp_conn->sbc_configuration); 1062 break; 1063 } 1064 1065 case A2DP_SUBEVENT_STREAM_ESTABLISHED: 1066 status = a2dp_subevent_stream_established_get_status(packet); 1067 if (status != ERROR_CODE_SUCCESS){ 1068 printf("A2DP Sink : Streaming connection failed, status 0x%02x\n", status); 1069 break; 1070 } 1071 1072 a2dp_subevent_stream_established_get_bd_addr(packet, a2dp_conn->addr); 1073 a2dp_conn->a2dp_cid = a2dp_subevent_stream_established_get_a2dp_cid(packet); 1074 a2dp_conn->a2dp_local_seid = a2dp_subevent_stream_established_get_local_seid(packet); 1075 a2dp_conn->stream_state = STREAM_STATE_OPEN; 1076 1077 printf("A2DP Sink : Streaming connection is established, address %s, cid 0x%02x, local seid %d\n", 1078 bd_addr_to_str(a2dp_conn->addr), a2dp_conn->a2dp_cid, a2dp_conn->a2dp_local_seid); 1079 #ifdef HAVE_BTSTACK_STDIN 1080 // use address for outgoing connections 1081 memcpy(device_addr, a2dp_conn->addr, 6); 1082 #endif 1083 break; 1084 1085 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 1086 case A2DP_SUBEVENT_START_STREAM_REQUESTED: 1087 printf("A2DP Sink : Explicit Accept to start stream, local_seid %d\n", a2dp_subevent_start_stream_requested_get_local_seid(packet)); 1088 a2dp_sink_start_stream_accept(a2dp_cid, a2dp_local_seid); 1089 break; 1090 #endif 1091 case A2DP_SUBEVENT_STREAM_STARTED: 1092 printf("A2DP Sink : Stream started\n"); 1093 a2dp_conn->stream_state = STREAM_STATE_PLAYING; 1094 if (a2dp_conn->sbc_configuration.reconfigure){ 1095 media_processing_close(); 1096 } 1097 // prepare media processing 1098 media_processing_init(&a2dp_conn->sbc_configuration); 1099 // audio stream is started when buffer reaches minimal level 1100 break; 1101 1102 case A2DP_SUBEVENT_STREAM_SUSPENDED: 1103 printf("A2DP Sink : Stream paused\n"); 1104 a2dp_conn->stream_state = STREAM_STATE_PAUSED; 1105 media_processing_pause(); 1106 break; 1107 1108 case A2DP_SUBEVENT_STREAM_RELEASED: 1109 printf("A2DP Sink : Stream released\n"); 1110 a2dp_conn->stream_state = STREAM_STATE_CLOSED; 1111 media_processing_close(); 1112 break; 1113 1114 case A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 1115 printf("A2DP Sink : Signaling connection released\n"); 1116 a2dp_conn->a2dp_cid = 0; 1117 media_processing_close(); 1118 break; 1119 1120 default: 1121 break; 1122 } 1123 } 1124 1125 #ifdef HAVE_BTSTACK_STDIN 1126 static void show_usage(void){ 1127 bd_addr_t iut_address; 1128 gap_local_bd_addr(iut_address); 1129 printf("\n--- A2DP Sink Demo Console %s ---\n", bd_addr_to_str(iut_address)); 1130 printf("b - A2DP Sink create connection to addr %s\n", bd_addr_to_str(device_addr)); 1131 printf("B - A2DP Sink disconnect\n"); 1132 1133 printf("\n--- AVRCP Controller ---\n"); 1134 printf("c - AVRCP create connection to addr %s\n", bd_addr_to_str(device_addr)); 1135 printf("C - AVRCP disconnect\n"); 1136 printf("O - get play status\n"); 1137 printf("j - get now playing info\n"); 1138 printf("k - play\n"); 1139 printf("K - stop\n"); 1140 printf("L - pause\n"); 1141 printf("u - start fast forward\n"); 1142 printf("U - stop fast forward\n"); 1143 printf("n - start rewind\n"); 1144 printf("N - stop rewind\n"); 1145 printf("i - forward\n"); 1146 printf("I - backward\n"); 1147 printf("M - mute\n"); 1148 printf("r - skip\n"); 1149 printf("q - query repeat and shuffle mode\n"); 1150 printf("v - repeat single track\n"); 1151 printf("w - delay report\n"); 1152 printf("x - repeat all tracks\n"); 1153 printf("X - disable repeat mode\n"); 1154 printf("z - shuffle all tracks\n"); 1155 printf("Z - disable shuffle mode\n"); 1156 1157 printf("a/A - register/deregister TRACK_CHANGED\n"); 1158 printf("R/P - register/deregister PLAYBACK_POS_CHANGED\n"); 1159 1160 printf("s/S - send/release long button press REWIND\n"); 1161 1162 printf("\n--- Volume and Battery Control ---\n"); 1163 printf("t - volume up for 10 percent\n"); 1164 printf("T - volume down for 10 percent\n"); 1165 printf("V - toggle Battery status from AVRCP_BATTERY_STATUS_NORMAL to AVRCP_BATTERY_STATUS_FULL_CHARGE\n"); 1166 1167 #ifdef ENABLE_AVRCP_COVER_ART 1168 printf("\n--- Cover Art Client ---\n"); 1169 printf("d - connect to addr %s\n", bd_addr_to_str(device_addr)); 1170 printf("D - disconnect\n"); 1171 if (a2dp_sink_demo_cover_art_client_connected == false){ 1172 if (a2dp_sink_demo_avrcp_connection.avrcp_cid == 0){ 1173 printf("Not connected, press 'b' or 'c' to first connect AVRCP, then press 'd' to connect cover art client\n"); 1174 } else { 1175 printf("Not connected, press 'd' to connect cover art client\n"); 1176 } 1177 } else if (a2dp_sink_demo_image_handle[0] == 0){ 1178 printf("No image handle, use 'j' to get current track info\n"); 1179 } 1180 printf("---\n"); 1181 #endif 1182 1183 } 1184 #endif 1185 1186 #ifdef HAVE_BTSTACK_STDIN 1187 1188 static void stdin_process(char cmd){ 1189 uint8_t status = ERROR_CODE_SUCCESS; 1190 uint8_t volume; 1191 avrcp_battery_status_t old_battery_status; 1192 1193 a2dp_sink_demo_a2dp_connection_t * a2dp_connection = &a2dp_sink_demo_a2dp_connection; 1194 a2dp_sink_demo_avrcp_connection_t * avrcp_connection = &a2dp_sink_demo_avrcp_connection; 1195 1196 switch (cmd){ 1197 case 'b': 1198 status = a2dp_sink_establish_stream(device_addr, &a2dp_connection->a2dp_cid); 1199 printf(" - Create AVDTP connection to addr %s, and local seid %d, cid 0x%02x.\n", 1200 bd_addr_to_str(device_addr), a2dp_connection->a2dp_local_seid, a2dp_connection->a2dp_cid); 1201 break; 1202 case 'B': 1203 printf(" - AVDTP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 1204 a2dp_sink_disconnect(a2dp_connection->a2dp_cid); 1205 break; 1206 case 'c': 1207 printf(" - Create AVRCP connection to addr %s.\n", bd_addr_to_str(device_addr)); 1208 status = avrcp_connect(device_addr, &avrcp_connection->avrcp_cid); 1209 break; 1210 case 'C': 1211 printf(" - AVRCP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 1212 status = avrcp_disconnect(avrcp_connection->avrcp_cid); 1213 break; 1214 1215 case '\n': 1216 case '\r': 1217 break; 1218 case 'w': 1219 printf("Send delay report\n"); 1220 avdtp_sink_delay_report(a2dp_connection->a2dp_cid, a2dp_connection->a2dp_local_seid, 100); 1221 break; 1222 // Volume Control 1223 case 't': 1224 volume_percentage = volume_percentage <= 90 ? volume_percentage + 10 : 100; 1225 volume = volume_percentage * 127 / 100; 1226 printf(" - volume up for 10 percent, %d%% (%d) \n", volume_percentage, volume); 1227 status = avrcp_target_volume_changed(avrcp_connection->avrcp_cid, volume); 1228 avrcp_volume_changed(volume); 1229 break; 1230 case 'T': 1231 volume_percentage = volume_percentage >= 10 ? volume_percentage - 10 : 0; 1232 volume = volume_percentage * 127 / 100; 1233 printf(" - volume down for 10 percent, %d%% (%d) \n", volume_percentage, volume); 1234 status = avrcp_target_volume_changed(avrcp_connection->avrcp_cid, volume); 1235 avrcp_volume_changed(volume); 1236 break; 1237 case 'V': 1238 old_battery_status = battery_status; 1239 1240 if (battery_status < AVRCP_BATTERY_STATUS_FULL_CHARGE){ 1241 battery_status = (avrcp_battery_status_t)((uint8_t) battery_status + 1); 1242 } else { 1243 battery_status = AVRCP_BATTERY_STATUS_NORMAL; 1244 } 1245 printf(" - toggle battery value, old %d, new %d\n", old_battery_status, battery_status); 1246 status = avrcp_target_battery_status_changed(avrcp_connection->avrcp_cid, battery_status); 1247 break; 1248 case 'O': 1249 printf(" - get play status\n"); 1250 status = avrcp_controller_get_play_status(avrcp_connection->avrcp_cid); 1251 break; 1252 case 'j': 1253 printf(" - get now playing info\n"); 1254 status = avrcp_controller_get_now_playing_info(avrcp_connection->avrcp_cid); 1255 break; 1256 case 'k': 1257 printf(" - play\n"); 1258 status = avrcp_controller_play(avrcp_connection->avrcp_cid); 1259 break; 1260 case 'K': 1261 printf(" - stop\n"); 1262 status = avrcp_controller_stop(avrcp_connection->avrcp_cid); 1263 break; 1264 case 'L': 1265 printf(" - pause\n"); 1266 status = avrcp_controller_pause(avrcp_connection->avrcp_cid); 1267 break; 1268 case 'u': 1269 printf(" - start fast forward\n"); 1270 status = avrcp_controller_press_and_hold_fast_forward(avrcp_connection->avrcp_cid); 1271 break; 1272 case 'U': 1273 printf(" - stop fast forward\n"); 1274 status = avrcp_controller_release_press_and_hold_cmd(avrcp_connection->avrcp_cid); 1275 break; 1276 case 'n': 1277 printf(" - start rewind\n"); 1278 status = avrcp_controller_press_and_hold_rewind(avrcp_connection->avrcp_cid); 1279 break; 1280 case 'N': 1281 printf(" - stop rewind\n"); 1282 status = avrcp_controller_release_press_and_hold_cmd(avrcp_connection->avrcp_cid); 1283 break; 1284 case 'i': 1285 printf(" - forward\n"); 1286 status = avrcp_controller_forward(avrcp_connection->avrcp_cid); 1287 break; 1288 case 'I': 1289 printf(" - backward\n"); 1290 status = avrcp_controller_backward(avrcp_connection->avrcp_cid); 1291 break; 1292 case 'M': 1293 printf(" - mute\n"); 1294 status = avrcp_controller_mute(avrcp_connection->avrcp_cid); 1295 break; 1296 case 'r': 1297 printf(" - skip\n"); 1298 status = avrcp_controller_skip(avrcp_connection->avrcp_cid); 1299 break; 1300 case 'q': 1301 printf(" - query repeat and shuffle mode\n"); 1302 status = avrcp_controller_query_shuffle_and_repeat_modes(avrcp_connection->avrcp_cid); 1303 break; 1304 case 'v': 1305 printf(" - repeat single track\n"); 1306 status = avrcp_controller_set_repeat_mode(avrcp_connection->avrcp_cid, AVRCP_REPEAT_MODE_SINGLE_TRACK); 1307 break; 1308 case 'x': 1309 printf(" - repeat all tracks\n"); 1310 status = avrcp_controller_set_repeat_mode(avrcp_connection->avrcp_cid, AVRCP_REPEAT_MODE_ALL_TRACKS); 1311 break; 1312 case 'X': 1313 printf(" - disable repeat mode\n"); 1314 status = avrcp_controller_set_repeat_mode(avrcp_connection->avrcp_cid, AVRCP_REPEAT_MODE_OFF); 1315 break; 1316 case 'z': 1317 printf(" - shuffle all tracks\n"); 1318 status = avrcp_controller_set_shuffle_mode(avrcp_connection->avrcp_cid, AVRCP_SHUFFLE_MODE_ALL_TRACKS); 1319 break; 1320 case 'Z': 1321 printf(" - disable shuffle mode\n"); 1322 status = avrcp_controller_set_shuffle_mode(avrcp_connection->avrcp_cid, AVRCP_SHUFFLE_MODE_OFF); 1323 break; 1324 case 'a': 1325 printf("AVRCP: enable notification TRACK_CHANGED\n"); 1326 status = avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1327 break; 1328 case 'A': 1329 printf("AVRCP: disable notification TRACK_CHANGED\n"); 1330 status = avrcp_controller_disable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1331 break; 1332 case 'R': 1333 printf("AVRCP: enable notification PLAYBACK_POS_CHANGED\n"); 1334 status = avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 1335 break; 1336 case 'P': 1337 printf("AVRCP: disable notification PLAYBACK_POS_CHANGED\n"); 1338 status = avrcp_controller_disable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 1339 break; 1340 case 's': 1341 printf("AVRCP: send long button press REWIND\n"); 1342 status = avrcp_controller_start_press_and_hold_cmd(avrcp_connection->avrcp_cid, AVRCP_OPERATION_ID_REWIND); 1343 break; 1344 case 'S': 1345 printf("AVRCP: release long button press REWIND\n"); 1346 status = avrcp_controller_release_press_and_hold_cmd(avrcp_connection->avrcp_cid); 1347 break; 1348 #ifdef ENABLE_AVRCP_COVER_ART 1349 case 'd': 1350 printf(" - Create AVRCP Cover Art connection to addr %s.\n", bd_addr_to_str(device_addr)); 1351 status = a2dp_sink_demo_cover_art_connect(); 1352 break; 1353 case 'D': 1354 printf(" - AVRCP Cover Art disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 1355 status = avrcp_cover_art_client_disconnect(a2dp_sink_demo_cover_art_cid); 1356 break; 1357 case '@': 1358 printf("Get linked thumbnail for '%s'\n", a2dp_sink_demo_image_handle); 1359 #ifdef HAVE_POSIX_FILE_IO 1360 a2dp_sink_cover_art_file = fopen(a2dp_sink_demo_thumbnail_path, "w"); 1361 #endif 1362 a2dp_sink_cover_art_download_active = true; 1363 a2dp_sink_cover_art_file_size = 0; 1364 status = avrcp_cover_art_client_get_linked_thumbnail(a2dp_sink_demo_cover_art_cid, a2dp_sink_demo_image_handle); 1365 break; 1366 #endif 1367 default: 1368 show_usage(); 1369 return; 1370 } 1371 if (status != ERROR_CODE_SUCCESS){ 1372 printf("Could not perform command, status 0x%02x\n", status); 1373 } 1374 } 1375 #endif 1376 1377 int btstack_main(int argc, const char * argv[]); 1378 int btstack_main(int argc, const char * argv[]){ 1379 UNUSED(argc); 1380 (void)argv; 1381 1382 setup_demo(); 1383 1384 #ifdef HAVE_BTSTACK_STDIN 1385 // parse human-readable Bluetooth address 1386 sscanf_bd_addr(device_addr_string, device_addr); 1387 btstack_stdin_setup(stdin_process); 1388 #endif 1389 1390 // turn on! 1391 printf("Starting BTstack ...\n"); 1392 hci_power_control(HCI_POWER_ON); 1393 return 0; 1394 } 1395 /* EXAMPLE_END */ 1396