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 #endif 90 91 #define NUM_CHANNELS 2 92 #define BYTES_PER_FRAME (2*NUM_CHANNELS) 93 #define MAX_SBC_FRAME_SIZE 120 94 95 #ifdef HAVE_BTSTACK_STDIN 96 static const char * device_addr_string = "00:1B:DC:08:E2:72"; // pts v5.0 97 static bd_addr_t device_addr; 98 #endif 99 100 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 101 static btstack_sample_rate_compensation_t sample_rate_compensation; 102 #endif 103 104 static btstack_packet_callback_registration_t hci_event_callback_registration; 105 106 static uint8_t sdp_avdtp_sink_service_buffer[150]; 107 static uint8_t sdp_avrcp_target_service_buffer[150]; 108 static uint8_t sdp_avrcp_controller_service_buffer[200]; 109 static uint8_t device_id_sdp_service_buffer[100]; 110 111 // we support all configurations with bitpool 2-53 112 static uint8_t media_sbc_codec_capabilities[] = { 113 0xFF,//(AVDTP_SBC_44100 << 4) | AVDTP_SBC_STEREO, 114 0xFF,//(AVDTP_SBC_BLOCK_LENGTH_16 << 4) | (AVDTP_SBC_SUBBANDS_8 << 2) | AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS, 115 2, 53 116 }; 117 118 // WAV File 119 #ifdef STORE_TO_WAV_FILE 120 static uint32_t audio_frame_count = 0; 121 static char * wav_filename = "a2dp_sink_demo.wav"; 122 #endif 123 124 // SBC Decoder for WAV file or live playback 125 static const btstack_sbc_decoder_t * sbc_decoder_instance; 126 static btstack_sbc_decoder_bluedroid_t sbc_decoder_context; 127 128 // ring buffer for SBC Frames 129 // below 30: add samples, 30-40: fine, above 40: drop samples 130 #define OPTIMAL_FRAMES_MIN 60 131 #define OPTIMAL_FRAMES_MAX 80 132 #define ADDITIONAL_FRAMES 30 133 static uint8_t sbc_frame_storage[(OPTIMAL_FRAMES_MAX + ADDITIONAL_FRAMES) * MAX_SBC_FRAME_SIZE]; 134 static btstack_ring_buffer_t sbc_frame_ring_buffer; 135 static unsigned int sbc_frame_size; 136 137 // overflow buffer for not fully used sbc frames, with additional frames for resampling 138 static uint8_t decoded_audio_storage[(128+16) * BYTES_PER_FRAME]; 139 static btstack_ring_buffer_t decoded_audio_ring_buffer; 140 141 static int media_initialized = 0; 142 static int audio_stream_started; 143 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 144 static int l2cap_stream_started; 145 #endif 146 static btstack_resample_t resample_instance; 147 148 // temp storage of lower-layer request for audio samples 149 static int16_t * request_buffer; 150 static int request_frames; 151 152 // sink state 153 static int volume_percentage = 0; 154 static avrcp_battery_status_t battery_status = AVRCP_BATTERY_STATUS_WARNING; 155 156 #ifdef ENABLE_AVRCP_COVER_ART 157 static char a2dp_sink_demo_image_handle[8]; 158 static avrcp_cover_art_client_t a2dp_sink_demo_cover_art_client; 159 static bool a2dp_sink_demo_cover_art_client_connected; 160 static uint16_t a2dp_sink_demo_cover_art_cid; 161 static uint8_t a2dp_sink_demo_ertm_buffer[2000]; 162 static l2cap_ertm_config_t a2dp_sink_demo_ertm_config = { 163 1, // ertm mandatory 164 2, // max transmit, some tests require > 1 165 2000, 166 12000, 167 512, // l2cap ertm mtu 168 2, 169 2, 170 1, // 16-bit FCS 171 }; 172 static bool a2dp_sink_cover_art_download_active; 173 static uint32_t a2dp_sink_cover_art_file_size; 174 #ifdef HAVE_POSIX_FILE_IO 175 static const char * a2dp_sink_demo_thumbnail_path = "cover.jpg"; 176 static FILE * a2dp_sink_cover_art_file; 177 #endif 178 #endif 179 180 typedef struct { 181 uint8_t reconfigure; 182 uint8_t num_channels; 183 uint16_t sampling_frequency; 184 uint8_t block_length; 185 uint8_t subbands; 186 uint8_t min_bitpool_value; 187 uint8_t max_bitpool_value; 188 btstack_sbc_channel_mode_t channel_mode; 189 btstack_sbc_allocation_method_t allocation_method; 190 } media_codec_configuration_sbc_t; 191 192 typedef enum { 193 STREAM_STATE_CLOSED, 194 STREAM_STATE_OPEN, 195 STREAM_STATE_PLAYING, 196 STREAM_STATE_PAUSED, 197 } stream_state_t; 198 199 typedef struct { 200 uint8_t a2dp_local_seid; 201 uint8_t media_sbc_codec_configuration[4]; 202 } a2dp_sink_demo_stream_endpoint_t; 203 static a2dp_sink_demo_stream_endpoint_t a2dp_sink_demo_stream_endpoint; 204 205 typedef struct { 206 bd_addr_t addr; 207 uint16_t a2dp_cid; 208 uint8_t a2dp_local_seid; 209 stream_state_t stream_state; 210 media_codec_configuration_sbc_t sbc_configuration; 211 } a2dp_sink_demo_a2dp_connection_t; 212 static a2dp_sink_demo_a2dp_connection_t a2dp_sink_demo_a2dp_connection; 213 214 typedef struct { 215 bd_addr_t addr; 216 uint16_t avrcp_cid; 217 bool playing; 218 uint16_t notifications_supported_by_target; 219 } a2dp_sink_demo_avrcp_connection_t; 220 static a2dp_sink_demo_avrcp_connection_t a2dp_sink_demo_avrcp_connection; 221 222 /* @section Main Application Setup 223 * 224 * @text The Listing MainConfiguration shows how to set up AD2P Sink and AVRCP services. 225 * Besides calling init() method for each service, you'll also need to register several packet handlers: 226 * - hci_packet_handler - handles legacy pairing, here by using fixed '0000' pin code. 227 * - 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). 228 * - 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. 229 * - avrcp_packet_handler - receives AVRCP connect/disconnect event. 230 * - avrcp_controller_packet_handler - receives answers for sent AVRCP commands. 231 * - avrcp_target_packet_handler - receives AVRCP commands, and registered notifications. 232 * - 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. 233 * 234 * @text To announce A2DP Sink and AVRCP services, you need to create corresponding 235 * SDP records and register them with the SDP service. 236 * 237 * @text Note, currently only the SBC codec is supported. 238 * If you want to store the audio data in a file, you'll need to define STORE_TO_WAV_FILE. 239 * 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. 240 * The initialization of the SBC decoder requires a callback that handles PCM data: 241 * - 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. 242 */ 243 244 /* LISTING_START(MainConfiguration): Setup Audio Sink and AVRCP services */ 245 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 246 static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * packet, uint16_t event_size); 247 static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size); 248 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 249 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 250 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 251 #ifdef HAVE_BTSTACK_STDIN 252 static void stdin_process(char cmd); 253 #endif 254 255 static int setup_demo(void){ 256 257 // init protocols 258 l2cap_init(); 259 sdp_init(); 260 #ifdef ENABLE_BLE 261 // Initialize LE Security Manager. Needed for cross-transport key derivation 262 sm_init(); 263 #endif 264 #ifdef ENABLE_AVRCP_COVER_ART 265 goep_client_init(); 266 avrcp_cover_art_client_init(); 267 #endif 268 269 // Init profiles 270 a2dp_sink_init(); 271 avrcp_init(); 272 avrcp_controller_init(); 273 avrcp_target_init(); 274 275 276 // Configure A2DP Sink 277 a2dp_sink_register_packet_handler(&a2dp_sink_packet_handler); 278 a2dp_sink_register_media_handler(&handle_l2cap_media_data_packet); 279 a2dp_sink_demo_stream_endpoint_t * stream_endpoint = &a2dp_sink_demo_stream_endpoint; 280 avdtp_stream_endpoint_t * local_stream_endpoint = a2dp_sink_create_stream_endpoint(AVDTP_AUDIO, 281 AVDTP_CODEC_SBC, media_sbc_codec_capabilities, sizeof(media_sbc_codec_capabilities), 282 stream_endpoint->media_sbc_codec_configuration, sizeof(stream_endpoint->media_sbc_codec_configuration)); 283 btstack_assert(local_stream_endpoint != NULL); 284 // - Store stream enpoint's SEP ID, as it is used by A2DP API to identify the stream endpoint 285 stream_endpoint->a2dp_local_seid = avdtp_local_seid(local_stream_endpoint); 286 287 288 // Configure AVRCP Controller + Target 289 avrcp_register_packet_handler(&avrcp_packet_handler); 290 avrcp_controller_register_packet_handler(&avrcp_controller_packet_handler); 291 avrcp_target_register_packet_handler(&avrcp_target_packet_handler); 292 293 294 // Configure SDP 295 296 // - Create and register A2DP Sink service record 297 memset(sdp_avdtp_sink_service_buffer, 0, sizeof(sdp_avdtp_sink_service_buffer)); 298 a2dp_sink_create_sdp_record(sdp_avdtp_sink_service_buffer, sdp_create_service_record_handle(), 299 AVDTP_SINK_FEATURE_MASK_HEADPHONE, NULL, NULL); 300 btstack_assert(de_get_len( sdp_avdtp_sink_service_buffer) <= sizeof(sdp_avdtp_sink_service_buffer)); 301 sdp_register_service(sdp_avdtp_sink_service_buffer); 302 303 // - Create AVRCP Controller service record and register it with SDP. We send Category 1 commands to the media player, e.g. play/pause 304 memset(sdp_avrcp_controller_service_buffer, 0, sizeof(sdp_avrcp_controller_service_buffer)); 305 uint16_t controller_supported_features = 1 << AVRCP_CONTROLLER_SUPPORTED_FEATURE_CATEGORY_PLAYER_OR_RECORDER; 306 #ifdef AVRCP_BROWSING_ENABLED 307 controller_supported_features |= 1 << AVRCP_CONTROLLER_SUPPORTED_FEATURE_BROWSING; 308 #endif 309 #ifdef ENABLE_AVRCP_COVER_ART 310 controller_supported_features |= 1 << AVRCP_CONTROLLER_SUPPORTED_FEATURE_COVER_ART_GET_LINKED_THUMBNAIL; 311 #endif 312 avrcp_controller_create_sdp_record(sdp_avrcp_controller_service_buffer, sdp_create_service_record_handle(), 313 controller_supported_features, NULL, NULL); 314 btstack_assert(de_get_len( sdp_avrcp_controller_service_buffer) <= sizeof(sdp_avrcp_controller_service_buffer)); 315 sdp_register_service(sdp_avrcp_controller_service_buffer); 316 317 // - Create and register A2DP Sink service record 318 // - We receive Category 2 commands from the media player, e.g. volume up/down 319 memset(sdp_avrcp_target_service_buffer, 0, sizeof(sdp_avrcp_target_service_buffer)); 320 uint16_t target_supported_features = 1 << AVRCP_TARGET_SUPPORTED_FEATURE_CATEGORY_MONITOR_OR_AMPLIFIER; 321 avrcp_target_create_sdp_record(sdp_avrcp_target_service_buffer, 322 sdp_create_service_record_handle(), target_supported_features, NULL, NULL); 323 btstack_assert(de_get_len( sdp_avrcp_target_service_buffer) <= sizeof(sdp_avrcp_target_service_buffer)); 324 sdp_register_service(sdp_avrcp_target_service_buffer); 325 326 // - Create and register Device ID (PnP) service record 327 memset(device_id_sdp_service_buffer, 0, sizeof(device_id_sdp_service_buffer)); 328 device_id_create_sdp_record(device_id_sdp_service_buffer, 329 sdp_create_service_record_handle(), DEVICE_ID_VENDOR_ID_SOURCE_BLUETOOTH, BLUETOOTH_COMPANY_ID_BLUEKITCHEN_GMBH, 1, 1); 330 btstack_assert(de_get_len( device_id_sdp_service_buffer) <= sizeof(device_id_sdp_service_buffer)); 331 sdp_register_service(device_id_sdp_service_buffer); 332 333 334 // Configure GAP - discovery / connection 335 336 // - Set local name with a template Bluetooth address, that will be automatically 337 // replaced with an actual address once it is available, i.e. when BTstack boots 338 // up and starts talking to a Bluetooth module. 339 gap_set_local_name("A2DP Sink Demo 00:00:00:00:00:00"); 340 341 // - Allow to show up in Bluetooth inquiry 342 gap_discoverable_control(1); 343 344 // - Set Class of Device - Service Class: Audio, Major Device Class: Audio, Minor: Loudspeaker 345 gap_set_class_of_device(0x200414); 346 347 // - Allow for role switch in general and sniff mode 348 gap_set_default_link_policy_settings( LM_LINK_POLICY_ENABLE_ROLE_SWITCH | LM_LINK_POLICY_ENABLE_SNIFF_MODE ); 349 350 // - Allow for role switch on outgoing connections 351 // - This allows A2DP Source, e.g. smartphone, to become master when we re-connect to it. 352 gap_set_allow_role_switch(true); 353 354 355 // Register for HCI events 356 hci_event_callback_registration.callback = &hci_packet_handler; 357 hci_add_event_handler(&hci_event_callback_registration); 358 359 // Inform about audio playback / test options 360 #ifdef HAVE_POSIX_FILE_IO 361 if (!btstack_audio_sink_get_instance()){ 362 printf("No audio playback.\n"); 363 } else { 364 printf("Audio playback supported.\n"); 365 } 366 #ifdef STORE_TO_WAV_FILE 367 printf("Audio will be stored to \'%s\' file.\n", wav_filename); 368 #endif 369 #endif 370 return 0; 371 } 372 /* LISTING_END */ 373 374 375 static void playback_handler(int16_t * buffer, uint16_t num_audio_frames){ 376 377 #ifdef STORE_TO_WAV_FILE 378 int wav_samples = num_audio_frames * NUM_CHANNELS; 379 int16_t * wav_buffer = buffer; 380 #endif 381 382 // called from lower-layer but guaranteed to be on main thread 383 if (sbc_frame_size == 0){ 384 memset(buffer, 0, num_audio_frames * BYTES_PER_FRAME); 385 return; 386 } 387 388 // first fill from resampled audio 389 uint32_t bytes_read; 390 btstack_ring_buffer_read(&decoded_audio_ring_buffer, (uint8_t *) buffer, num_audio_frames * BYTES_PER_FRAME, &bytes_read); 391 buffer += bytes_read / NUM_CHANNELS; 392 num_audio_frames -= bytes_read / BYTES_PER_FRAME; 393 394 // then start decoding sbc frames using request_* globals 395 request_buffer = buffer; 396 request_frames = num_audio_frames; 397 while (request_frames && btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) >= sbc_frame_size){ 398 // decode frame 399 uint8_t sbc_frame[MAX_SBC_FRAME_SIZE]; 400 btstack_ring_buffer_read(&sbc_frame_ring_buffer, sbc_frame, sbc_frame_size, &bytes_read); 401 sbc_decoder_instance->decode_signed_16(&sbc_decoder_context, 0, sbc_frame, sbc_frame_size); 402 } 403 404 #ifdef STORE_TO_WAV_FILE 405 audio_frame_count += num_audio_frames; 406 wav_writer_write_int16(wav_samples, wav_buffer); 407 #endif 408 } 409 410 static void handle_pcm_data(int16_t * data, int num_audio_frames, int num_channels, int sample_rate, void * context){ 411 UNUSED(sample_rate); 412 UNUSED(context); 413 UNUSED(num_channels); // must be stereo == 2 414 415 const btstack_audio_sink_t * audio_sink = btstack_audio_sink_get_instance(); 416 if (!audio_sink){ 417 #ifdef STORE_TO_WAV_FILE 418 audio_frame_count += num_audio_frames; 419 wav_writer_write_int16(num_audio_frames * NUM_CHANNELS, data); 420 #endif 421 return; 422 } 423 424 // resample into request buffer - add some additional space for resampling 425 int16_t output_buffer[(128+16) * NUM_CHANNELS]; // 16 * 8 * 2 426 uint32_t resampled_frames = btstack_resample_block(&resample_instance, data, num_audio_frames, output_buffer); 427 428 // store data in btstack_audio buffer first 429 int frames_to_copy = btstack_min(resampled_frames, request_frames); 430 memcpy(request_buffer, output_buffer, frames_to_copy * BYTES_PER_FRAME); 431 request_frames -= frames_to_copy; 432 request_buffer += frames_to_copy * NUM_CHANNELS; 433 434 // and rest in ring buffer 435 int frames_to_store = resampled_frames - frames_to_copy; 436 if (frames_to_store){ 437 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); 438 if (status){ 439 printf("Error storing samples in PCM ring buffer!!!\n"); 440 } 441 } 442 } 443 444 static int media_processing_init(media_codec_configuration_sbc_t * configuration){ 445 if (media_initialized) return 0; 446 sbc_decoder_instance = btstack_sbc_decoder_bluedroid_init_instance(&sbc_decoder_context); 447 sbc_decoder_instance->configure(&sbc_decoder_context, SBC_MODE_STANDARD, handle_pcm_data, NULL); 448 449 #ifdef STORE_TO_WAV_FILE 450 wav_writer_open(wav_filename, configuration->num_channels, configuration->sampling_frequency); 451 #endif 452 453 btstack_ring_buffer_init(&sbc_frame_ring_buffer, sbc_frame_storage, sizeof(sbc_frame_storage)); 454 btstack_ring_buffer_init(&decoded_audio_ring_buffer, decoded_audio_storage, sizeof(decoded_audio_storage)); 455 btstack_resample_init(&resample_instance, configuration->num_channels); 456 457 // setup audio playback 458 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 459 if (audio){ 460 audio->init(NUM_CHANNELS, configuration->sampling_frequency, &playback_handler); 461 } 462 463 audio_stream_started = 0; 464 media_initialized = 1; 465 return 0; 466 } 467 468 static void media_processing_start(void){ 469 if (!media_initialized) return; 470 471 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 472 btstack_sample_rate_compensation_reset( &sample_rate_compensation, btstack_run_loop_get_time_ms() ); 473 #endif 474 // setup audio playback 475 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 476 if (audio){ 477 audio->start_stream(); 478 } 479 audio_stream_started = 1; 480 } 481 482 static void media_processing_pause(void){ 483 if (!media_initialized) return; 484 485 // stop audio playback 486 audio_stream_started = 0; 487 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 488 l2cap_stream_started = 0; 489 #endif 490 491 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 492 if (audio){ 493 audio->stop_stream(); 494 } 495 // discard pending data 496 btstack_ring_buffer_reset(&decoded_audio_ring_buffer); 497 btstack_ring_buffer_reset(&sbc_frame_ring_buffer); 498 } 499 500 static void media_processing_close(void){ 501 if (!media_initialized) return; 502 503 media_initialized = 0; 504 audio_stream_started = 0; 505 sbc_frame_size = 0; 506 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 507 l2cap_stream_started = 0; 508 #endif 509 510 #ifdef STORE_TO_WAV_FILE 511 wav_writer_close(); 512 uint32_t total_frames_nr = sbc_decoder_context.good_frames_nr + sbc_decoder_context.bad_frames_nr + sbc_decoder_context.zero_frames_nr; 513 514 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); 515 printf("WAV Writer: Wrote %u audio frames to wav file: %s\n", audio_frame_count, wav_filename); 516 #endif 517 518 // stop audio playback 519 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 520 if (audio){ 521 printf("close stream\n"); 522 audio->close(); 523 } 524 } 525 526 /* @section Handle Media Data Packet 527 * 528 * @text Here the audio data, are received through the handle_l2cap_media_data_packet callback. 529 * Currently, only the SBC media codec is supported. Hence, the media data consists of the media packet header and the SBC packet. 530 * 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). 531 * If the audio stream wasn't started already and there are enough SBC frames in the ring buffer, start playback. 532 */ 533 534 static int read_media_data_header(uint8_t * packet, int size, int * offset, avdtp_media_packet_header_t * media_header); 535 static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header); 536 537 static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size){ 538 UNUSED(seid); 539 int pos = 0; 540 541 avdtp_media_packet_header_t media_header; 542 if (!read_media_data_header(packet, size, &pos, &media_header)) return; 543 544 avdtp_sbc_codec_header_t sbc_header; 545 if (!read_sbc_header(packet, size, &pos, &sbc_header)) return; 546 547 int packet_length = size-pos; 548 uint8_t *packet_begin = packet+pos; 549 550 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 551 // process data right away if there's no audio implementation active, e.g. on posix systems to store as .wav 552 if (!audio){ 553 sbc_decoder_instance->decode_signed_16(&sbc_decoder_context, 0, packet_begin, packet_length); 554 return; 555 } 556 557 // store sbc frame size for buffer management 558 sbc_frame_size = packet_length / sbc_header.num_frames; 559 int status = btstack_ring_buffer_write(&sbc_frame_ring_buffer, packet_begin, packet_length); 560 if (status != ERROR_CODE_SUCCESS){ 561 printf("Error storing samples in SBC ring buffer!!!\n"); 562 } 563 564 // decide on audio sync drift based on number of sbc frames in queue 565 int sbc_frames_in_buffer = btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) / sbc_frame_size; 566 #ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE 567 if( !l2cap_stream_started && audio_stream_started ) { 568 l2cap_stream_started = 1; 569 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) ); 570 } 571 // update sample rate compensation 572 if( audio_stream_started && (audio != NULL)) { 573 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() ); 574 btstack_resample_set_factor(&resample_instance, resampling_factor); 575 // printf("sbc buffer level : %"PRIu32"\n", btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer)); 576 } 577 #else 578 uint32_t resampling_factor; 579 580 // nominal factor (fixed-point 2^16) and compensation offset 581 uint32_t nominal_factor = 0x10000; 582 uint32_t compensation = 0x00100; 583 584 if (sbc_frames_in_buffer < OPTIMAL_FRAMES_MIN){ 585 resampling_factor = nominal_factor - compensation; // stretch samples 586 } else if (sbc_frames_in_buffer <= OPTIMAL_FRAMES_MAX){ 587 resampling_factor = nominal_factor; // nothing to do 588 } else { 589 resampling_factor = nominal_factor + compensation; // compress samples 590 } 591 592 btstack_resample_set_factor(&resample_instance, resampling_factor); 593 #endif 594 // start stream if enough frames buffered 595 if (!audio_stream_started && sbc_frames_in_buffer >= OPTIMAL_FRAMES_MIN){ 596 media_processing_start(); 597 } 598 } 599 600 static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header){ 601 int sbc_header_len = 12; // without crc 602 int pos = *offset; 603 604 if (size - pos < sbc_header_len){ 605 printf("Not enough data to read SBC header, expected %d, received %d\n", sbc_header_len, size-pos); 606 return 0; 607 } 608 609 sbc_header->fragmentation = get_bit16(packet[pos], 7); 610 sbc_header->starting_packet = get_bit16(packet[pos], 6); 611 sbc_header->last_packet = get_bit16(packet[pos], 5); 612 sbc_header->num_frames = packet[pos] & 0x0f; 613 pos++; 614 *offset = pos; 615 return 1; 616 } 617 618 static int read_media_data_header(uint8_t *packet, int size, int *offset, avdtp_media_packet_header_t *media_header){ 619 int media_header_len = 12; // without crc 620 int pos = *offset; 621 622 if (size - pos < media_header_len){ 623 printf("Not enough data to read media packet header, expected %d, received %d\n", media_header_len, size-pos); 624 return 0; 625 } 626 627 media_header->version = packet[pos] & 0x03; 628 media_header->padding = get_bit16(packet[pos],2); 629 media_header->extension = get_bit16(packet[pos],3); 630 media_header->csrc_count = (packet[pos] >> 4) & 0x0F; 631 pos++; 632 633 media_header->marker = get_bit16(packet[pos],0); 634 media_header->payload_type = (packet[pos] >> 1) & 0x7F; 635 pos++; 636 637 media_header->sequence_number = big_endian_read_16(packet, pos); 638 pos+=2; 639 640 media_header->timestamp = big_endian_read_32(packet, pos); 641 pos+=4; 642 643 media_header->synchronization_source = big_endian_read_32(packet, pos); 644 pos+=4; 645 *offset = pos; 646 return 1; 647 } 648 649 static void dump_sbc_configuration(media_codec_configuration_sbc_t * configuration){ 650 printf(" - num_channels: %d\n", configuration->num_channels); 651 printf(" - sampling_frequency: %d\n", configuration->sampling_frequency); 652 printf(" - channel_mode: %d\n", configuration->channel_mode); 653 printf(" - block_length: %d\n", configuration->block_length); 654 printf(" - subbands: %d\n", configuration->subbands); 655 printf(" - allocation_method: %d\n", configuration->allocation_method); 656 printf(" - bitpool_value [%d, %d] \n", configuration->min_bitpool_value, configuration->max_bitpool_value); 657 printf("\n"); 658 } 659 660 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 661 UNUSED(channel); 662 UNUSED(size); 663 if (packet_type != HCI_EVENT_PACKET) return; 664 if (hci_event_packet_get_type(packet) == HCI_EVENT_PIN_CODE_REQUEST) { 665 bd_addr_t address; 666 printf("Pin code request - using '0000'\n"); 667 hci_event_pin_code_request_get_bd_addr(packet, address); 668 gap_pin_code_response(address, "0000"); 669 } 670 } 671 672 #ifdef ENABLE_AVRCP_COVER_ART 673 static void a2dp_sink_demo_cover_art_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) { 674 UNUSED(channel); 675 UNUSED(size); 676 uint8_t status; 677 uint16_t cid; 678 switch (packet_type){ 679 case BIP_DATA_PACKET: 680 if (a2dp_sink_cover_art_download_active){ 681 a2dp_sink_cover_art_file_size += size; 682 #ifdef HAVE_POSIX_FILE_IO 683 fwrite(packet, 1, size, a2dp_sink_cover_art_file); 684 #else 685 printf("Cover art : TODO - store %u bytes image data\n", size); 686 #endif 687 } else { 688 uint16_t i; 689 for (i=0;i<size;i++){ 690 putchar(packet[i]); 691 } 692 printf("\n"); 693 } 694 break; 695 case HCI_EVENT_PACKET: 696 switch (hci_event_packet_get_type(packet)){ 697 case HCI_EVENT_AVRCP_META: 698 switch (hci_event_avrcp_meta_get_subevent_code(packet)){ 699 case AVRCP_SUBEVENT_COVER_ART_CONNECTION_ESTABLISHED: 700 status = avrcp_subevent_cover_art_connection_established_get_status(packet); 701 cid = avrcp_subevent_cover_art_connection_established_get_cover_art_cid(packet); 702 if (status == ERROR_CODE_SUCCESS){ 703 printf("Cover Art : connection established, cover art cid 0x%02x\n", cid); 704 a2dp_sink_demo_cover_art_client_connected = true; 705 } else { 706 printf("Cover Art : connection failed, status 0x%02x\n", status); 707 a2dp_sink_demo_cover_art_cid = 0; 708 } 709 break; 710 case AVRCP_SUBEVENT_COVER_ART_OPERATION_COMPLETE: 711 if (a2dp_sink_cover_art_download_active){ 712 a2dp_sink_cover_art_download_active = false; 713 #ifdef HAVE_POSIX_FILE_IO 714 printf("Cover Art : download of '%s complete, size %u bytes'\n", 715 a2dp_sink_demo_thumbnail_path, a2dp_sink_cover_art_file_size); 716 fclose(a2dp_sink_cover_art_file); 717 a2dp_sink_cover_art_file = NULL; 718 #else 719 printf("Cover Art: download completed\n"); 720 #endif 721 } 722 break; 723 case AVRCP_SUBEVENT_COVER_ART_CONNECTION_RELEASED: 724 a2dp_sink_demo_cover_art_client_connected = false; 725 a2dp_sink_demo_cover_art_cid = 0; 726 printf("Cover Art : connection released 0x%02x\n", 727 avrcp_subevent_cover_art_connection_released_get_cover_art_cid(packet)); 728 break; 729 default: 730 break; 731 } 732 break; 733 default: 734 break; 735 } 736 break; 737 default: 738 break; 739 } 740 } 741 742 static uint8_t a2dp_sink_demo_cover_art_connect(void) { 743 uint8_t status; 744 status = avrcp_cover_art_client_connect(&a2dp_sink_demo_cover_art_client, a2dp_sink_demo_cover_art_packet_handler, 745 device_addr, a2dp_sink_demo_ertm_buffer, 746 sizeof(a2dp_sink_demo_ertm_buffer), &a2dp_sink_demo_ertm_config, 747 &a2dp_sink_demo_cover_art_cid); 748 return status; 749 } 750 #endif 751 752 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 753 UNUSED(channel); 754 UNUSED(size); 755 uint16_t local_cid; 756 uint8_t status; 757 bd_addr_t address; 758 759 a2dp_sink_demo_avrcp_connection_t * connection = &a2dp_sink_demo_avrcp_connection; 760 761 if (packet_type != HCI_EVENT_PACKET) return; 762 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 763 switch (packet[2]){ 764 case AVRCP_SUBEVENT_CONNECTION_ESTABLISHED: { 765 local_cid = avrcp_subevent_connection_established_get_avrcp_cid(packet); 766 status = avrcp_subevent_connection_established_get_status(packet); 767 if (status != ERROR_CODE_SUCCESS){ 768 printf("AVRCP: Connection failed, status 0x%02x\n", status); 769 connection->avrcp_cid = 0; 770 return; 771 } 772 773 connection->avrcp_cid = local_cid; 774 avrcp_subevent_connection_established_get_bd_addr(packet, address); 775 printf("AVRCP: Connected to %s, cid 0x%02x\n", bd_addr_to_str(address), connection->avrcp_cid); 776 777 #ifdef HAVE_BTSTACK_STDIN 778 // use address for outgoing connections 779 avrcp_subevent_connection_established_get_bd_addr(packet, device_addr); 780 #endif 781 782 avrcp_target_support_event(connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED); 783 avrcp_target_support_event(connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED); 784 avrcp_target_battery_status_changed(connection->avrcp_cid, battery_status); 785 786 // query supported events: 787 avrcp_controller_get_supported_events(connection->avrcp_cid); 788 return; 789 } 790 791 case AVRCP_SUBEVENT_CONNECTION_RELEASED: 792 printf("AVRCP: Channel released: cid 0x%02x\n", avrcp_subevent_connection_released_get_avrcp_cid(packet)); 793 connection->avrcp_cid = 0; 794 connection->notifications_supported_by_target = 0; 795 return; 796 default: 797 break; 798 } 799 } 800 801 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 802 UNUSED(channel); 803 UNUSED(size); 804 805 // helper to print c strings 806 uint8_t avrcp_subevent_value[256]; 807 uint8_t play_status; 808 uint8_t event_id; 809 810 a2dp_sink_demo_avrcp_connection_t * avrcp_connection = &a2dp_sink_demo_avrcp_connection; 811 812 if (packet_type != HCI_EVENT_PACKET) return; 813 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 814 if (avrcp_connection->avrcp_cid == 0) return; 815 816 memset(avrcp_subevent_value, 0, sizeof(avrcp_subevent_value)); 817 switch (packet[2]){ 818 case AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID: 819 avrcp_connection->notifications_supported_by_target |= (1 << avrcp_subevent_get_capability_event_id_get_event_id(packet)); 820 break; 821 case AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID_DONE: 822 823 printf("AVRCP Controller: supported notifications by target:\n"); 824 for (event_id = (uint8_t) AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; event_id < (uint8_t) AVRCP_NOTIFICATION_EVENT_LAST_INDEX; event_id++){ 825 printf(" - [%s] %s\n", 826 (avrcp_connection->notifications_supported_by_target & (1 << event_id)) != 0 ? "X" : " ", 827 avrcp_notification2str((avrcp_notification_event_id_t)event_id)); 828 } 829 printf("\n\n"); 830 831 // automatically enable notifications 832 avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED); 833 avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED); 834 avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 835 836 #ifdef ENABLE_AVRCP_COVER_ART 837 // image handles become invalid on player change, registe for notifications 838 avrcp_controller_enable_notification(a2dp_sink_demo_avrcp_connection.avrcp_cid, AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED); 839 // trigger cover art client connection 840 a2dp_sink_demo_cover_art_connect(); 841 #endif 842 break; 843 844 case AVRCP_SUBEVENT_NOTIFICATION_STATE: 845 event_id = (avrcp_notification_event_id_t)avrcp_subevent_notification_state_get_event_id(packet); 846 printf("AVRCP Controller: %s notification registered\n", avrcp_notification2str(event_id)); 847 break; 848 849 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED: 850 printf("AVRCP Controller: Playback position changed, position %d ms\n", (unsigned int) avrcp_subevent_notification_playback_pos_changed_get_playback_position_ms(packet)); 851 break; 852 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_STATUS_CHANGED: 853 printf("AVRCP Controller: Playback status changed %s\n", avrcp_play_status2str(avrcp_subevent_notification_playback_status_changed_get_play_status(packet))); 854 play_status = avrcp_subevent_notification_playback_status_changed_get_play_status(packet); 855 switch (play_status){ 856 case AVRCP_PLAYBACK_STATUS_PLAYING: 857 avrcp_connection->playing = true; 858 break; 859 default: 860 avrcp_connection->playing = false; 861 break; 862 } 863 break; 864 865 case AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED: 866 printf("AVRCP Controller: Playing content changed\n"); 867 break; 868 869 case AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED: 870 printf("AVRCP Controller: Track changed\n"); 871 break; 872 873 case AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED: 874 printf("AVRCP Controller: Available Players Changed\n"); 875 break; 876 877 case AVRCP_SUBEVENT_SHUFFLE_AND_REPEAT_MODE:{ 878 uint8_t shuffle_mode = avrcp_subevent_shuffle_and_repeat_mode_get_shuffle_mode(packet); 879 uint8_t repeat_mode = avrcp_subevent_shuffle_and_repeat_mode_get_repeat_mode(packet); 880 printf("AVRCP Controller: %s, %s\n", avrcp_shuffle2str(shuffle_mode), avrcp_repeat2str(repeat_mode)); 881 break; 882 } 883 case AVRCP_SUBEVENT_NOW_PLAYING_TRACK_INFO: 884 printf("AVRCP Controller: Track %d\n", avrcp_subevent_now_playing_track_info_get_track(packet)); 885 break; 886 887 case AVRCP_SUBEVENT_NOW_PLAYING_TOTAL_TRACKS_INFO: 888 printf("AVRCP Controller: Total Tracks %d\n", avrcp_subevent_now_playing_total_tracks_info_get_total_tracks(packet)); 889 break; 890 891 case AVRCP_SUBEVENT_NOW_PLAYING_TITLE_INFO: 892 if (avrcp_subevent_now_playing_title_info_get_value_len(packet) > 0){ 893 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_title_info_get_value(packet), avrcp_subevent_now_playing_title_info_get_value_len(packet)); 894 printf("AVRCP Controller: Title %s\n", avrcp_subevent_value); 895 } 896 break; 897 898 case AVRCP_SUBEVENT_NOW_PLAYING_ARTIST_INFO: 899 if (avrcp_subevent_now_playing_artist_info_get_value_len(packet) > 0){ 900 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_artist_info_get_value(packet), avrcp_subevent_now_playing_artist_info_get_value_len(packet)); 901 printf("AVRCP Controller: Artist %s\n", avrcp_subevent_value); 902 } 903 break; 904 905 case AVRCP_SUBEVENT_NOW_PLAYING_ALBUM_INFO: 906 if (avrcp_subevent_now_playing_album_info_get_value_len(packet) > 0){ 907 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_album_info_get_value(packet), avrcp_subevent_now_playing_album_info_get_value_len(packet)); 908 printf("AVRCP Controller: Album %s\n", avrcp_subevent_value); 909 } 910 break; 911 912 case AVRCP_SUBEVENT_NOW_PLAYING_GENRE_INFO: 913 if (avrcp_subevent_now_playing_genre_info_get_value_len(packet) > 0){ 914 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_genre_info_get_value(packet), avrcp_subevent_now_playing_genre_info_get_value_len(packet)); 915 printf("AVRCP Controller: Genre %s\n", avrcp_subevent_value); 916 } 917 break; 918 919 case AVRCP_SUBEVENT_PLAY_STATUS: 920 printf("AVRCP Controller: Song length %"PRIu32" ms, Song position %"PRIu32" ms, Play status %s\n", 921 avrcp_subevent_play_status_get_song_length(packet), 922 avrcp_subevent_play_status_get_song_position(packet), 923 avrcp_play_status2str(avrcp_subevent_play_status_get_play_status(packet))); 924 break; 925 926 case AVRCP_SUBEVENT_OPERATION_COMPLETE: 927 printf("AVRCP Controller: %s complete\n", avrcp_operation2str(avrcp_subevent_operation_complete_get_operation_id(packet))); 928 break; 929 930 case AVRCP_SUBEVENT_OPERATION_START: 931 printf("AVRCP Controller: %s start\n", avrcp_operation2str(avrcp_subevent_operation_start_get_operation_id(packet))); 932 break; 933 934 case AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_END: 935 printf("AVRCP Controller: Track reached end\n"); 936 break; 937 938 case AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE: 939 printf("AVRCP Controller: Set Player App Value %s\n", avrcp_ctype2str(avrcp_subevent_player_application_value_response_get_command_type(packet))); 940 break; 941 942 #ifdef ENABLE_AVRCP_COVER_ART 943 case AVRCP_SUBEVENT_NOTIFICATION_EVENT_UIDS_CHANGED: 944 if (a2dp_sink_demo_cover_art_client_connected){ 945 printf("AVRCP Controller: UIDs changed -> disconnect cover art client\n"); 946 avrcp_cover_art_client_disconnect(a2dp_sink_demo_cover_art_cid); 947 } 948 break; 949 950 case AVRCP_SUBEVENT_NOW_PLAYING_COVER_ART_INFO: 951 if (avrcp_subevent_now_playing_cover_art_info_get_value_len(packet) == 7){ 952 memcpy(a2dp_sink_demo_image_handle, avrcp_subevent_now_playing_cover_art_info_get_value(packet), 7); 953 printf("AVRCP Controller: Cover Art %s\n", a2dp_sink_demo_image_handle); 954 } 955 break; 956 #endif 957 958 default: 959 break; 960 } 961 } 962 963 static void avrcp_volume_changed(uint8_t volume){ 964 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 965 if (audio){ 966 audio->set_volume(volume); 967 } 968 } 969 970 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 971 UNUSED(channel); 972 UNUSED(size); 973 974 if (packet_type != HCI_EVENT_PACKET) return; 975 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 976 977 uint8_t volume; 978 char const * button_state; 979 avrcp_operation_id_t operation_id; 980 981 switch (packet[2]){ 982 case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED: 983 volume = avrcp_subevent_notification_volume_changed_get_absolute_volume(packet); 984 volume_percentage = volume * 100 / 127; 985 printf("AVRCP Target : Volume set to %d%% (%d)\n", volume_percentage, volume); 986 avrcp_volume_changed(volume); 987 break; 988 989 case AVRCP_SUBEVENT_OPERATION: 990 operation_id = avrcp_subevent_operation_get_operation_id(packet); 991 button_state = avrcp_subevent_operation_get_button_pressed(packet) > 0 ? "PRESS" : "RELEASE"; 992 switch (operation_id){ 993 case AVRCP_OPERATION_ID_VOLUME_UP: 994 printf("AVRCP Target : VOLUME UP (%s)\n", button_state); 995 break; 996 case AVRCP_OPERATION_ID_VOLUME_DOWN: 997 printf("AVRCP Target : VOLUME DOWN (%s)\n", button_state); 998 break; 999 default: 1000 return; 1001 } 1002 break; 1003 default: 1004 printf("AVRCP Target : Event 0x%02x is not parsed\n", packet[2]); 1005 break; 1006 } 1007 } 1008 1009 static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1010 UNUSED(channel); 1011 UNUSED(size); 1012 uint8_t status; 1013 1014 uint8_t allocation_method; 1015 1016 if (packet_type != HCI_EVENT_PACKET) return; 1017 if (hci_event_packet_get_type(packet) != HCI_EVENT_A2DP_META) return; 1018 1019 a2dp_sink_demo_a2dp_connection_t * a2dp_conn = &a2dp_sink_demo_a2dp_connection; 1020 1021 switch (packet[2]){ 1022 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 1023 printf("A2DP Sink : Received non SBC codec - not implemented\n"); 1024 break; 1025 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 1026 printf("A2DP Sink : Received SBC codec configuration\n"); 1027 a2dp_conn->sbc_configuration.reconfigure = a2dp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 1028 a2dp_conn->sbc_configuration.num_channels = a2dp_subevent_signaling_media_codec_sbc_configuration_get_num_channels(packet); 1029 a2dp_conn->sbc_configuration.sampling_frequency = a2dp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 1030 a2dp_conn->sbc_configuration.block_length = a2dp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 1031 a2dp_conn->sbc_configuration.subbands = a2dp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 1032 a2dp_conn->sbc_configuration.min_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 1033 a2dp_conn->sbc_configuration.max_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 1034 1035 allocation_method = a2dp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 1036 1037 // Adapt Bluetooth spec definition to SBC Encoder expected input 1038 a2dp_conn->sbc_configuration.allocation_method = (btstack_sbc_allocation_method_t)(allocation_method - 1); 1039 1040 switch (a2dp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet)){ 1041 case AVDTP_CHANNEL_MODE_JOINT_STEREO: 1042 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO; 1043 break; 1044 case AVDTP_CHANNEL_MODE_STEREO: 1045 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_STEREO; 1046 break; 1047 case AVDTP_CHANNEL_MODE_DUAL_CHANNEL: 1048 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_DUAL_CHANNEL; 1049 break; 1050 case AVDTP_CHANNEL_MODE_MONO: 1051 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_MONO; 1052 break; 1053 default: 1054 btstack_assert(false); 1055 break; 1056 } 1057 dump_sbc_configuration(&a2dp_conn->sbc_configuration); 1058 break; 1059 } 1060 1061 case A2DP_SUBEVENT_STREAM_ESTABLISHED: 1062 status = a2dp_subevent_stream_established_get_status(packet); 1063 if (status != ERROR_CODE_SUCCESS){ 1064 printf("A2DP Sink : Streaming connection failed, status 0x%02x\n", status); 1065 break; 1066 } 1067 1068 a2dp_subevent_stream_established_get_bd_addr(packet, a2dp_conn->addr); 1069 a2dp_conn->a2dp_cid = a2dp_subevent_stream_established_get_a2dp_cid(packet); 1070 a2dp_conn->a2dp_local_seid = a2dp_subevent_stream_established_get_local_seid(packet); 1071 a2dp_conn->stream_state = STREAM_STATE_OPEN; 1072 1073 printf("A2DP Sink : Streaming connection is established, address %s, cid 0x%02x, local seid %d\n", 1074 bd_addr_to_str(a2dp_conn->addr), a2dp_conn->a2dp_cid, a2dp_conn->a2dp_local_seid); 1075 #ifdef HAVE_BTSTACK_STDIN 1076 // use address for outgoing connections 1077 memcpy(device_addr, a2dp_conn->addr, 6); 1078 #endif 1079 break; 1080 1081 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 1082 case A2DP_SUBEVENT_START_STREAM_REQUESTED: 1083 printf("A2DP Sink : Explicit Accept to start stream, local_seid %d\n", a2dp_subevent_start_stream_requested_get_local_seid(packet)); 1084 a2dp_sink_start_stream_accept(a2dp_cid, a2dp_local_seid); 1085 break; 1086 #endif 1087 case A2DP_SUBEVENT_STREAM_STARTED: 1088 printf("A2DP Sink : Stream started\n"); 1089 a2dp_conn->stream_state = STREAM_STATE_PLAYING; 1090 if (a2dp_conn->sbc_configuration.reconfigure){ 1091 media_processing_close(); 1092 } 1093 // prepare media processing 1094 media_processing_init(&a2dp_conn->sbc_configuration); 1095 // audio stream is started when buffer reaches minimal level 1096 break; 1097 1098 case A2DP_SUBEVENT_STREAM_SUSPENDED: 1099 printf("A2DP Sink : Stream paused\n"); 1100 a2dp_conn->stream_state = STREAM_STATE_PAUSED; 1101 media_processing_pause(); 1102 break; 1103 1104 case A2DP_SUBEVENT_STREAM_RELEASED: 1105 printf("A2DP Sink : Stream released\n"); 1106 a2dp_conn->stream_state = STREAM_STATE_CLOSED; 1107 media_processing_close(); 1108 break; 1109 1110 case A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 1111 printf("A2DP Sink : Signaling connection released\n"); 1112 a2dp_conn->a2dp_cid = 0; 1113 media_processing_close(); 1114 break; 1115 1116 default: 1117 break; 1118 } 1119 } 1120 1121 #ifdef HAVE_BTSTACK_STDIN 1122 static void show_usage(void){ 1123 bd_addr_t iut_address; 1124 gap_local_bd_addr(iut_address); 1125 printf("\n--- A2DP Sink Demo Console %s ---\n", bd_addr_to_str(iut_address)); 1126 printf("b - A2DP Sink create connection to addr %s\n", bd_addr_to_str(device_addr)); 1127 printf("B - A2DP Sink disconnect\n"); 1128 1129 printf("\n--- AVRCP Controller ---\n"); 1130 printf("c - AVRCP create connection to addr %s\n", bd_addr_to_str(device_addr)); 1131 printf("C - AVRCP disconnect\n"); 1132 printf("O - get play status\n"); 1133 printf("j - get now playing info\n"); 1134 printf("k - play\n"); 1135 printf("K - stop\n"); 1136 printf("L - pause\n"); 1137 printf("u - start fast forward\n"); 1138 printf("U - stop fast forward\n"); 1139 printf("n - start rewind\n"); 1140 printf("N - stop rewind\n"); 1141 printf("i - forward\n"); 1142 printf("I - backward\n"); 1143 printf("M - mute\n"); 1144 printf("r - skip\n"); 1145 printf("q - query repeat and shuffle mode\n"); 1146 printf("v - repeat single track\n"); 1147 printf("w - delay report\n"); 1148 printf("x - repeat all tracks\n"); 1149 printf("X - disable repeat mode\n"); 1150 printf("z - shuffle all tracks\n"); 1151 printf("Z - disable shuffle mode\n"); 1152 1153 printf("a/A - register/deregister TRACK_CHANGED\n"); 1154 printf("R/P - register/deregister PLAYBACK_POS_CHANGED\n"); 1155 1156 printf("s/S - send/release long button press REWIND\n"); 1157 1158 printf("\n--- Volume and Battery Control ---\n"); 1159 printf("t - volume up for 10 percent\n"); 1160 printf("T - volume down for 10 percent\n"); 1161 printf("V - toggle Battery status from AVRCP_BATTERY_STATUS_NORMAL to AVRCP_BATTERY_STATUS_FULL_CHARGE\n"); 1162 1163 #ifdef ENABLE_AVRCP_COVER_ART 1164 printf("\n--- Cover Art Client ---\n"); 1165 printf("d - connect to addr %s\n", bd_addr_to_str(device_addr)); 1166 printf("D - disconnect\n"); 1167 if (a2dp_sink_demo_cover_art_client_connected == false){ 1168 if (a2dp_sink_demo_avrcp_connection.avrcp_cid == 0){ 1169 printf("Not connected, press 'b' or 'c' to first connect AVRCP, then press 'd' to connect cover art client\n"); 1170 } else { 1171 printf("Not connected, press 'd' to connect cover art client\n"); 1172 } 1173 } else if (a2dp_sink_demo_image_handle[0] == 0){ 1174 printf("No image handle, use 'j' to get current track info\n"); 1175 } 1176 printf("---\n"); 1177 #endif 1178 1179 } 1180 #endif 1181 1182 #ifdef HAVE_BTSTACK_STDIN 1183 1184 static void stdin_process(char cmd){ 1185 uint8_t status = ERROR_CODE_SUCCESS; 1186 uint8_t volume; 1187 avrcp_battery_status_t old_battery_status; 1188 1189 a2dp_sink_demo_a2dp_connection_t * a2dp_connection = &a2dp_sink_demo_a2dp_connection; 1190 a2dp_sink_demo_avrcp_connection_t * avrcp_connection = &a2dp_sink_demo_avrcp_connection; 1191 1192 switch (cmd){ 1193 case 'b': 1194 status = a2dp_sink_establish_stream(device_addr, &a2dp_connection->a2dp_cid); 1195 printf(" - Create AVDTP connection to addr %s, and local seid %d, cid 0x%02x.\n", 1196 bd_addr_to_str(device_addr), a2dp_connection->a2dp_local_seid, a2dp_connection->a2dp_cid); 1197 break; 1198 case 'B': 1199 printf(" - AVDTP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 1200 a2dp_sink_disconnect(a2dp_connection->a2dp_cid); 1201 break; 1202 case 'c': 1203 printf(" - Create AVRCP connection to addr %s.\n", bd_addr_to_str(device_addr)); 1204 status = avrcp_connect(device_addr, &avrcp_connection->avrcp_cid); 1205 break; 1206 case 'C': 1207 printf(" - AVRCP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 1208 status = avrcp_disconnect(avrcp_connection->avrcp_cid); 1209 break; 1210 1211 case '\n': 1212 case '\r': 1213 break; 1214 case 'w': 1215 printf("Send delay report\n"); 1216 avdtp_sink_delay_report(a2dp_connection->a2dp_cid, a2dp_connection->a2dp_local_seid, 100); 1217 break; 1218 // Volume Control 1219 case 't': 1220 volume_percentage = volume_percentage <= 90 ? volume_percentage + 10 : 100; 1221 volume = volume_percentage * 127 / 100; 1222 printf(" - volume up for 10 percent, %d%% (%d) \n", volume_percentage, volume); 1223 status = avrcp_target_volume_changed(avrcp_connection->avrcp_cid, volume); 1224 avrcp_volume_changed(volume); 1225 break; 1226 case 'T': 1227 volume_percentage = volume_percentage >= 10 ? volume_percentage - 10 : 0; 1228 volume = volume_percentage * 127 / 100; 1229 printf(" - volume down for 10 percent, %d%% (%d) \n", volume_percentage, volume); 1230 status = avrcp_target_volume_changed(avrcp_connection->avrcp_cid, volume); 1231 avrcp_volume_changed(volume); 1232 break; 1233 case 'V': 1234 old_battery_status = battery_status; 1235 1236 if (battery_status < AVRCP_BATTERY_STATUS_FULL_CHARGE){ 1237 battery_status = (avrcp_battery_status_t)((uint8_t) battery_status + 1); 1238 } else { 1239 battery_status = AVRCP_BATTERY_STATUS_NORMAL; 1240 } 1241 printf(" - toggle battery value, old %d, new %d\n", old_battery_status, battery_status); 1242 status = avrcp_target_battery_status_changed(avrcp_connection->avrcp_cid, battery_status); 1243 break; 1244 case 'O': 1245 printf(" - get play status\n"); 1246 status = avrcp_controller_get_play_status(avrcp_connection->avrcp_cid); 1247 break; 1248 case 'j': 1249 printf(" - get now playing info\n"); 1250 status = avrcp_controller_get_now_playing_info(avrcp_connection->avrcp_cid); 1251 break; 1252 case 'k': 1253 printf(" - play\n"); 1254 status = avrcp_controller_play(avrcp_connection->avrcp_cid); 1255 break; 1256 case 'K': 1257 printf(" - stop\n"); 1258 status = avrcp_controller_stop(avrcp_connection->avrcp_cid); 1259 break; 1260 case 'L': 1261 printf(" - pause\n"); 1262 status = avrcp_controller_pause(avrcp_connection->avrcp_cid); 1263 break; 1264 case 'u': 1265 printf(" - start fast forward\n"); 1266 status = avrcp_controller_press_and_hold_fast_forward(avrcp_connection->avrcp_cid); 1267 break; 1268 case 'U': 1269 printf(" - stop fast forward\n"); 1270 status = avrcp_controller_release_press_and_hold_cmd(avrcp_connection->avrcp_cid); 1271 break; 1272 case 'n': 1273 printf(" - start rewind\n"); 1274 status = avrcp_controller_press_and_hold_rewind(avrcp_connection->avrcp_cid); 1275 break; 1276 case 'N': 1277 printf(" - stop rewind\n"); 1278 status = avrcp_controller_release_press_and_hold_cmd(avrcp_connection->avrcp_cid); 1279 break; 1280 case 'i': 1281 printf(" - forward\n"); 1282 status = avrcp_controller_forward(avrcp_connection->avrcp_cid); 1283 break; 1284 case 'I': 1285 printf(" - backward\n"); 1286 status = avrcp_controller_backward(avrcp_connection->avrcp_cid); 1287 break; 1288 case 'M': 1289 printf(" - mute\n"); 1290 status = avrcp_controller_mute(avrcp_connection->avrcp_cid); 1291 break; 1292 case 'r': 1293 printf(" - skip\n"); 1294 status = avrcp_controller_skip(avrcp_connection->avrcp_cid); 1295 break; 1296 case 'q': 1297 printf(" - query repeat and shuffle mode\n"); 1298 status = avrcp_controller_query_shuffle_and_repeat_modes(avrcp_connection->avrcp_cid); 1299 break; 1300 case 'v': 1301 printf(" - repeat single track\n"); 1302 status = avrcp_controller_set_repeat_mode(avrcp_connection->avrcp_cid, AVRCP_REPEAT_MODE_SINGLE_TRACK); 1303 break; 1304 case 'x': 1305 printf(" - repeat all tracks\n"); 1306 status = avrcp_controller_set_repeat_mode(avrcp_connection->avrcp_cid, AVRCP_REPEAT_MODE_ALL_TRACKS); 1307 break; 1308 case 'X': 1309 printf(" - disable repeat mode\n"); 1310 status = avrcp_controller_set_repeat_mode(avrcp_connection->avrcp_cid, AVRCP_REPEAT_MODE_OFF); 1311 break; 1312 case 'z': 1313 printf(" - shuffle all tracks\n"); 1314 status = avrcp_controller_set_shuffle_mode(avrcp_connection->avrcp_cid, AVRCP_SHUFFLE_MODE_ALL_TRACKS); 1315 break; 1316 case 'Z': 1317 printf(" - disable shuffle mode\n"); 1318 status = avrcp_controller_set_shuffle_mode(avrcp_connection->avrcp_cid, AVRCP_SHUFFLE_MODE_OFF); 1319 break; 1320 case 'a': 1321 printf("AVRCP: enable notification TRACK_CHANGED\n"); 1322 status = avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1323 break; 1324 case 'A': 1325 printf("AVRCP: disable notification TRACK_CHANGED\n"); 1326 status = avrcp_controller_disable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1327 break; 1328 case 'R': 1329 printf("AVRCP: enable notification PLAYBACK_POS_CHANGED\n"); 1330 status = avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 1331 break; 1332 case 'P': 1333 printf("AVRCP: disable notification PLAYBACK_POS_CHANGED\n"); 1334 status = avrcp_controller_disable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 1335 break; 1336 case 's': 1337 printf("AVRCP: send long button press REWIND\n"); 1338 status = avrcp_controller_start_press_and_hold_cmd(avrcp_connection->avrcp_cid, AVRCP_OPERATION_ID_REWIND); 1339 break; 1340 case 'S': 1341 printf("AVRCP: release long button press REWIND\n"); 1342 status = avrcp_controller_release_press_and_hold_cmd(avrcp_connection->avrcp_cid); 1343 break; 1344 #ifdef ENABLE_AVRCP_COVER_ART 1345 case 'd': 1346 printf(" - Create AVRCP Cover Art connection to addr %s.\n", bd_addr_to_str(device_addr)); 1347 status = a2dp_sink_demo_cover_art_connect(); 1348 break; 1349 case 'D': 1350 printf(" - AVRCP Cover Art disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 1351 status = avrcp_cover_art_client_disconnect(a2dp_sink_demo_cover_art_cid); 1352 break; 1353 case '@': 1354 printf("Get linked thumbnail for '%s'\n", a2dp_sink_demo_image_handle); 1355 #ifdef HAVE_POSIX_FILE_IO 1356 a2dp_sink_cover_art_file = fopen(a2dp_sink_demo_thumbnail_path, "w"); 1357 #endif 1358 a2dp_sink_cover_art_download_active = true; 1359 a2dp_sink_cover_art_file_size = 0; 1360 status = avrcp_cover_art_client_get_linked_thumbnail(a2dp_sink_demo_cover_art_cid, a2dp_sink_demo_image_handle); 1361 break; 1362 #endif 1363 default: 1364 show_usage(); 1365 return; 1366 } 1367 if (status != ERROR_CODE_SUCCESS){ 1368 printf("Could not perform command, status 0x%02x\n", status); 1369 } 1370 } 1371 #endif 1372 1373 int btstack_main(int argc, const char * argv[]); 1374 int btstack_main(int argc, const char * argv[]){ 1375 UNUSED(argc); 1376 (void)argv; 1377 1378 setup_demo(); 1379 1380 #ifdef HAVE_BTSTACK_STDIN 1381 // parse human-readable Bluetooth address 1382 sscanf_bd_addr(device_addr_string, device_addr); 1383 btstack_stdin_setup(stdin_process); 1384 #endif 1385 1386 // turn on! 1387 printf("Starting BTstack ...\n"); 1388 hci_power_control(HCI_POWER_ON); 1389 return 0; 1390 } 1391 /* EXAMPLE_END */ 1392