1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "a2dp_sink_demo.c" 39 40 /* 41 * a2dp_sink_demo.c 42 */ 43 44 // ***************************************************************************** 45 /* EXAMPLE_START(a2dp_sink_demo): Receive audio stream and control its 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. 52 * 53 * @test To test with a remote device, e.g. a mobile phone, 54 * pair from the remote device with the demo, then start playing music on the remote device. 55 * Alternatively, set the device_addr_string to the Bluetooth address of your 56 * remote device in the code, and call connect from the UI. 57 * 58 * @test To controll the playback, tap SPACE on the console to show the available 59 * AVRCP commands. 60 */ 61 // ***************************************************************************** 62 63 #include <inttypes.h> 64 #include <stdint.h> 65 #include <stdio.h> 66 #include <stdlib.h> 67 #include <string.h> 68 69 #include "btstack.h" 70 71 //#define AVRCP_BROWSING_ENABLED 72 73 #ifdef HAVE_BTSTACK_STDIN 74 #include "btstack_stdin.h" 75 #endif 76 77 #include "btstack_ring_buffer.h" 78 79 #ifdef HAVE_POSIX_FILE_IO 80 #include "wav_util.h" 81 #define STORE_SBC_TO_SBC_FILE 82 #define STORE_SBC_TO_WAV_FILE 83 #endif 84 85 #define NUM_CHANNELS 2 86 #define BYTES_PER_FRAME (2*NUM_CHANNELS) 87 #define MAX_SBC_FRAME_SIZE 120 88 89 // SBC Decoder for WAV file or live playback 90 static btstack_sbc_decoder_state_t state; 91 static btstack_sbc_mode_t mode = SBC_MODE_STANDARD; 92 93 // ring buffer for SBC Frames 94 // below 30: add samples, 30-40: fine, above 40: drop samples 95 #define OPTIMAL_FRAMES_MIN 30 96 #define OPTIMAL_FRAMES_MAX 40 97 #define ADDITIONAL_FRAMES 10 98 static uint8_t sbc_frame_storage[(OPTIMAL_FRAMES_MAX + ADDITIONAL_FRAMES) * MAX_SBC_FRAME_SIZE]; 99 static btstack_ring_buffer_t sbc_frame_ring_buffer; 100 static unsigned int sbc_frame_size; 101 static int sbc_samples_fix; 102 103 // ring buffer for not fully used sbc frames 104 #define MAX_NUM_SBC_SAMPLES 128 105 static uint8_t decoded_audio_storage[(MAX_NUM_SBC_SAMPLES+4) * BYTES_PER_FRAME]; 106 static btstack_ring_buffer_t decoded_audio_ring_buffer; 107 108 // 109 static int audio_stream_started; 110 111 // temp storage of lower-layer request 112 static int16_t * request_buffer; 113 static int request_samples; 114 115 // WAV File 116 #ifdef STORE_SBC_TO_WAV_FILE 117 static int frame_count = 0; 118 static char * wav_filename = "avdtp_sink.wav"; 119 #endif 120 121 #ifdef STORE_SBC_TO_SBC_FILE 122 static FILE * sbc_file; 123 static char * sbc_filename = "avdtp_sink.sbc"; 124 #endif 125 126 typedef struct { 127 // bitmaps 128 uint8_t sampling_frequency_bitmap; 129 uint8_t channel_mode_bitmap; 130 uint8_t block_length_bitmap; 131 uint8_t subbands_bitmap; 132 uint8_t allocation_method_bitmap; 133 uint8_t min_bitpool_value; 134 uint8_t max_bitpool_value; 135 } adtvp_media_codec_information_sbc_t; 136 137 typedef struct { 138 int reconfigure; 139 int num_channels; 140 int sampling_frequency; 141 int channel_mode; 142 int block_length; 143 int subbands; 144 int allocation_method; 145 int min_bitpool_value; 146 int max_bitpool_value; 147 int frames_per_buffer; 148 } avdtp_media_codec_configuration_sbc_t; 149 150 #ifdef HAVE_BTSTACK_STDIN 151 // pts: static bd_addr_t remote = {0x00, 0x1B, 0xDC, 0x08, 0x0A, 0xA5}; 152 // mac 2013: static const char * device_addr_string = "84:38:35:65:d1:15"; 153 // iPhone 5S: 154 static const char * device_addr_string = "54:E4:3A:26:A2:39"; 155 #endif 156 157 static uint8_t sdp_avdtp_sink_service_buffer[150]; 158 static avdtp_media_codec_configuration_sbc_t sbc_configuration; 159 static uint16_t a2dp_cid = 0; 160 static uint8_t local_seid = 0; 161 static uint8_t value[100]; 162 163 static btstack_packet_callback_registration_t hci_event_callback_registration; 164 165 static int media_initialized = 0; 166 167 #ifdef HAVE_BTSTACK_STDIN 168 static bd_addr_t device_addr; 169 #endif 170 171 static uint16_t a2dp_sink_connected = 0; 172 static uint16_t avrcp_cid = 0; 173 static uint8_t avrcp_connected = 0; 174 static uint8_t sdp_avrcp_controller_service_buffer[200]; 175 176 static uint8_t media_sbc_codec_capabilities[] = { 177 0xFF,//(AVDTP_SBC_44100 << 4) | AVDTP_SBC_STEREO, 178 0xFF,//(AVDTP_SBC_BLOCK_LENGTH_16 << 4) | (AVDTP_SBC_SUBBANDS_8 << 2) | AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS, 179 2, 53 180 }; 181 182 static uint8_t media_sbc_codec_configuration[] = { 183 (AVDTP_SBC_44100 << 4) | AVDTP_SBC_STEREO, 184 (AVDTP_SBC_BLOCK_LENGTH_16 << 4) | (AVDTP_SBC_SUBBANDS_8 << 2) | AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS, 185 2, 53 186 }; 187 188 189 /* @section Main Application Setup 190 * 191 * @text The Listing MainConfiguration shows how to setup AD2P Sink and AVRCP controller services. 192 * To announce A2DP Sink and AVRCP Controller services, you need to create corresponding 193 * SDP records and register them with the SDP service. 194 * You'll also need to register several packet handlers: 195 * - 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). 196 * - handle_l2cap_media_data_packet - used to receive streaming data. If HAVE_PORTAUDIO or STORE_SBC_TO_WAV_FILE directives (check btstack_config.h) are 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. 197 * - stdin_process callback - used to trigger AVRCP commands to the A2DP Source device, such are get now playing info, start, stop, volume control. Requires HAVE_BTSTACK_STDIN. 198 * - avrcp_controller_packet_handler - used to receive answers for AVRCP commands, 199 * 200 * @text Note, currently only the SBC codec is supported. 201 * If you want to store the audio data in a file, you'll need to define STORE_SBC_TO_WAV_FILE. The HAVE_PORTAUDIO directive indicates if the audio is played back via PortAudio. 202 * If HAVE_PORTAUDIO or STORE_SBC_TO_WAV_FILE directives is defined, the SBC decoder needs to get initialized when a2dp_sink_packet_handler receives event A2DP_SUBEVENT_STREAM_STARTED. 203 * The initialization of the SBC decoder requires a callback that handles PCM data: 204 * - handle_pcm_data - handles PCM audio frames. Here, they are stored a in wav file if STORE_SBC_TO_WAV_FILE is defined, and/or played using the PortAudio library if HAVE_PORTAUDIO is defined. 205 */ 206 207 /* LISTING_START(MainConfiguration): Setup Audio Sink and AVRCP Controller services */ 208 static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size); 209 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 210 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 211 static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size); 212 213 static int a2dp_and_avrcp_setup(void){ 214 215 l2cap_init(); 216 // Initialize AVDTP Sink 217 a2dp_sink_init(); 218 a2dp_sink_register_packet_handler(&a2dp_sink_packet_handler); 219 a2dp_sink_register_media_handler(&handle_l2cap_media_data_packet); 220 221 uint8_t status = a2dp_sink_create_stream_endpoint(AVDTP_AUDIO, AVDTP_CODEC_SBC, media_sbc_codec_capabilities, sizeof(media_sbc_codec_capabilities), media_sbc_codec_configuration, sizeof(media_sbc_codec_configuration), &local_seid); 222 if (status != ERROR_CODE_SUCCESS){ 223 printf("A2DP Sink: not enough memory to create local stream endpoint\n"); 224 return 1; 225 } 226 // Initialize AVRCP COntroller 227 avrcp_controller_init(); 228 avrcp_controller_register_packet_handler(&avrcp_controller_packet_handler); 229 230 // Initialize SDP 231 sdp_init(); 232 // setup AVDTP sink 233 memset(sdp_avdtp_sink_service_buffer, 0, sizeof(sdp_avdtp_sink_service_buffer)); 234 a2dp_sink_create_sdp_record(sdp_avdtp_sink_service_buffer, 0x10001, 1, NULL, NULL); 235 sdp_register_service(sdp_avdtp_sink_service_buffer); 236 237 // setup AVRCP 238 memset(sdp_avrcp_controller_service_buffer, 0, sizeof(sdp_avrcp_controller_service_buffer)); 239 240 uint16_t supported_features = (1 << AVRCP_CONTROLLER_SUPPORTED_FEATURE_CATEGORY_PLAYER_OR_RECORDER); 241 #ifdef AVRCP_BROWSING_ENABLED 242 supported_features |= (1 << AVRCP_CONTROLLER_SUPPORTED_FEATURE_BROWSING); 243 #endif 244 avrcp_controller_create_sdp_record(sdp_avrcp_controller_service_buffer, 0x10001, supported_features, NULL, NULL); 245 sdp_register_service(sdp_avrcp_controller_service_buffer); 246 247 gap_set_local_name("A2DP Sink Demo 00:00:00:00:00:00"); 248 gap_discoverable_control(1); 249 gap_set_class_of_device(0x200408); 250 251 /* Register for HCI events */ 252 hci_event_callback_registration.callback = &hci_packet_handler; 253 hci_add_event_handler(&hci_event_callback_registration); 254 255 return 0; 256 } 257 258 static void playback_handler(int16_t * buffer, uint16_t num_samples){ 259 260 // called from lower-layer but guaranteed to be on main thread 261 262 // first fill from decoded_audio 263 uint32_t bytes_read; 264 btstack_ring_buffer_read(&decoded_audio_ring_buffer, (uint8_t *) buffer, num_samples * BYTES_PER_FRAME, &bytes_read); 265 buffer += bytes_read / NUM_CHANNELS; 266 num_samples -= bytes_read / BYTES_PER_FRAME; 267 268 // then start decoding sbc frames using request_* globals 269 request_buffer = buffer; 270 request_samples = num_samples; 271 while (request_samples && btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) >= sbc_frame_size){ 272 // log_info("buffer %06u bytes -- need %d", btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer), request_samples); 273 // decode frame 274 uint8_t frame[MAX_SBC_FRAME_SIZE]; 275 btstack_ring_buffer_read(&sbc_frame_ring_buffer, frame, sbc_frame_size, &bytes_read); 276 btstack_sbc_decoder_process_data(&state, 0, frame, sbc_frame_size); 277 } 278 } 279 280 static void handle_pcm_data(int16_t * data, int num_samples, int num_channels, int sample_rate, void * context){ 281 UNUSED(sample_rate); 282 UNUSED(context); 283 UNUSED(num_channels); // must be stereo == 2 284 285 #ifdef STORE_SBC_TO_WAV_FILE 286 wav_writer_write_int16(num_samples * NUM_CHANNELS, data); 287 frame_count++; 288 #endif 289 290 int sbc_samples_fix_applied = 0; 291 292 // drop audio frame to fix drift 293 if (sbc_samples_fix < 0){ 294 num_samples--; 295 data += NUM_CHANNELS; 296 sbc_samples_fix_applied = 1; 297 } 298 299 // store data in btstack_audio buffer first 300 if (request_samples){ 301 302 // add audio frame to fix drift 303 if (!sbc_samples_fix_applied && sbc_samples_fix > 0){ 304 memcpy(request_buffer, data, BYTES_PER_FRAME); 305 request_samples--; 306 request_buffer += NUM_CHANNELS; 307 sbc_samples_fix_applied = 1; 308 } 309 310 int samples_to_copy = btstack_min(num_samples, request_samples); 311 memcpy(request_buffer, data, samples_to_copy * BYTES_PER_FRAME); 312 num_samples -= samples_to_copy; 313 request_samples -= samples_to_copy; 314 data += samples_to_copy * NUM_CHANNELS; 315 request_buffer += samples_to_copy * NUM_CHANNELS; 316 } 317 318 // and rest in ring buffer 319 if (num_samples){ 320 321 // add audio frame to fix drift 322 if (!sbc_samples_fix_applied && sbc_samples_fix > 0){ 323 btstack_ring_buffer_write(&decoded_audio_ring_buffer, (uint8_t *) data, BYTES_PER_FRAME); 324 sbc_samples_fix_applied = 1; 325 } 326 327 btstack_ring_buffer_write(&decoded_audio_ring_buffer, (uint8_t *) data, num_samples * BYTES_PER_FRAME); 328 } 329 } 330 331 static int media_processing_init(avdtp_media_codec_configuration_sbc_t configuration){ 332 if (media_initialized) return 0; 333 334 btstack_sbc_decoder_init(&state, mode, handle_pcm_data, NULL); 335 336 #ifdef STORE_SBC_TO_WAV_FILE 337 wav_writer_open(wav_filename, configuration.num_channels, configuration.sampling_frequency); 338 #endif 339 340 #ifdef STORE_SBC_TO_SBC_FILE 341 sbc_file = fopen(sbc_filename, "wb"); 342 #endif 343 344 btstack_ring_buffer_init(&sbc_frame_ring_buffer, sbc_frame_storage, sizeof(sbc_frame_storage)); 345 btstack_ring_buffer_init(&decoded_audio_ring_buffer, decoded_audio_storage, sizeof(decoded_audio_storage)); 346 347 // setup audio playback 348 const btstack_audio_t * audio = btstack_audio_get_instance(); 349 if (audio){ 350 audio->init(NUM_CHANNELS, configuration.sampling_frequency, &playback_handler, NULL); 351 } 352 353 audio_stream_started = 0; 354 media_initialized = 1; 355 return 0; 356 } 357 358 static void media_processing_close(void){ 359 360 if (!media_initialized) return; 361 media_initialized = 0; 362 audio_stream_started = 0; 363 364 #ifdef STORE_SBC_TO_WAV_FILE 365 wav_writer_close(); 366 int total_frames_nr = state.good_frames_nr + state.bad_frames_nr + state.zero_frames_nr; 367 368 printf("WAV Writer: Decoding done. Processed totaly %d frames:\n - %d good\n - %d bad\n", total_frames_nr, state.good_frames_nr, total_frames_nr - state.good_frames_nr); 369 printf("WAV Writer: Written %d frames to wav file: %s\n", frame_count, wav_filename); 370 #endif 371 372 #ifdef STORE_SBC_TO_SBC_FILE 373 fclose(sbc_file); 374 #endif 375 376 // stop audio playback 377 const btstack_audio_t * audio = btstack_audio_get_instance(); 378 if (audio){ 379 audio->close(); 380 } 381 } 382 383 /* @section Handle Media Data Packet 384 * 385 * @text Media data packets, in this case the audio data, are received through the handle_l2cap_media_data_packet callback. 386 * Currently, only the SBC media codec is supported. Hence, the media data consists of the media packet header and the SBC packet. 387 * 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) 388 * If the audio stream wasn't started already and there are enough SBC frames in the ring buffer, start playback. 389 */ 390 391 static int read_media_data_header(uint8_t * packet, int size, int * offset, avdtp_media_packet_header_t * media_header); 392 static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header); 393 394 static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size){ 395 UNUSED(seid); 396 int pos = 0; 397 398 avdtp_media_packet_header_t media_header; 399 if (!read_media_data_header(packet, size, &pos, &media_header)) return; 400 401 avdtp_sbc_codec_header_t sbc_header; 402 if (!read_sbc_header(packet, size, &pos, &sbc_header)) return; 403 404 const btstack_audio_t * audio = btstack_audio_get_instance(); 405 406 // process data right away if there's no audio implementation active, e.g. on posix systems to store as .wav 407 if (!audio){ 408 btstack_sbc_decoder_process_data(&state, 0, packet+pos, size-pos); 409 return; 410 } 411 412 // store sbc frame size for buffer management 413 sbc_frame_size = (size-pos)/ sbc_header.num_frames; 414 415 btstack_ring_buffer_write(&sbc_frame_ring_buffer, packet+pos, size-pos); 416 417 // decide on audio sync drift based on number of sbc frames in queue 418 int sbc_frames_in_buffer = btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) / sbc_frame_size; 419 if (sbc_frames_in_buffer < OPTIMAL_FRAMES_MIN){ 420 sbc_samples_fix = 1; // duplicate last sample 421 } else if (sbc_frames_in_buffer <= OPTIMAL_FRAMES_MAX){ 422 sbc_samples_fix = 0; // nothing to do 423 } else { 424 sbc_samples_fix = -1; // drop last sample 425 } 426 427 // dump 428 // printf("%6u %03u %d\n", (int) btstack_run_loop_get_time_ms(), sbc_frames_in_buffer, sbc_samples_fix); 429 // log_info("%03u %d", sbc_frames_in_buffer, sbc_samples_fix); 430 431 #ifdef STORE_SBC_TO_SBC_FILE 432 fwrite(packet+pos, size-pos, 1, sbc_file); 433 #endif 434 435 // start stream if enough frames buffered 436 if (!audio_stream_started && sbc_frames_in_buffer >= (OPTIMAL_FRAMES_MAX+OPTIMAL_FRAMES_MIN)/2){ 437 audio_stream_started = 1; 438 // setup audio playback 439 if (audio){ 440 audio->start_stream(); 441 } 442 } 443 } 444 445 static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header){ 446 int sbc_header_len = 12; // without crc 447 int pos = *offset; 448 449 if (size - pos < sbc_header_len){ 450 printf("Not enough data to read SBC header, expected %d, received %d\n", sbc_header_len, size-pos); 451 return 0; 452 } 453 454 sbc_header->fragmentation = get_bit16(packet[pos], 7); 455 sbc_header->starting_packet = get_bit16(packet[pos], 6); 456 sbc_header->last_packet = get_bit16(packet[pos], 5); 457 sbc_header->num_frames = packet[pos] & 0x0f; 458 pos++; 459 // printf("SBC HEADER: num_frames %u, fragmented %u, start %u, stop %u\n", sbc_header.num_frames, sbc_header.fragmentation, sbc_header.starting_packet, sbc_header.last_packet); 460 *offset = pos; 461 return 1; 462 } 463 464 static int read_media_data_header(uint8_t *packet, int size, int *offset, avdtp_media_packet_header_t *media_header){ 465 int media_header_len = 12; // without crc 466 int pos = *offset; 467 468 if (size - pos < media_header_len){ 469 printf("Not enough data to read media packet header, expected %d, received %d\n", media_header_len, size-pos); 470 return 0; 471 } 472 473 media_header->version = packet[pos] & 0x03; 474 media_header->padding = get_bit16(packet[pos],2); 475 media_header->extension = get_bit16(packet[pos],3); 476 media_header->csrc_count = (packet[pos] >> 4) & 0x0F; 477 pos++; 478 479 media_header->marker = get_bit16(packet[pos],0); 480 media_header->payload_type = (packet[pos] >> 1) & 0x7F; 481 pos++; 482 483 media_header->sequence_number = big_endian_read_16(packet, pos); 484 pos+=2; 485 486 media_header->timestamp = big_endian_read_32(packet, pos); 487 pos+=4; 488 489 media_header->synchronization_source = big_endian_read_32(packet, pos); 490 pos+=4; 491 *offset = pos; 492 // TODO: read csrc list 493 494 // printf_hexdump( packet, pos ); 495 // printf("MEDIA HEADER: %u timestamp, version %u, padding %u, extension %u, csrc_count %u\n", 496 // media_header->timestamp, media_header->version, media_header->padding, media_header->extension, media_header->csrc_count); 497 // printf("MEDIA HEADER: marker %02x, payload_type %02x, sequence_number %u, synchronization_source %u\n", 498 // media_header->marker, media_header->payload_type, media_header->sequence_number, media_header->synchronization_source); 499 return 1; 500 } 501 502 static void dump_sbc_configuration(avdtp_media_codec_configuration_sbc_t configuration){ 503 printf("Received SBC configuration:\n"); 504 printf(" - num_channels: %d\n", configuration.num_channels); 505 printf(" - sampling_frequency: %d\n", configuration.sampling_frequency); 506 printf(" - channel_mode: %d\n", configuration.channel_mode); 507 printf(" - block_length: %d\n", configuration.block_length); 508 printf(" - subbands: %d\n", configuration.subbands); 509 printf(" - allocation_method: %d\n", configuration.allocation_method); 510 printf(" - bitpool_value [%d, %d] \n", configuration.min_bitpool_value, configuration.max_bitpool_value); 511 printf("\n"); 512 } 513 514 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 515 UNUSED(channel); 516 UNUSED(size); 517 uint16_t local_cid; 518 uint8_t status = 0xFF; 519 bd_addr_t adress; 520 521 if (packet_type != HCI_EVENT_PACKET) return; 522 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 523 switch (packet[2]){ 524 case AVRCP_SUBEVENT_CONNECTION_ESTABLISHED: { 525 local_cid = avrcp_subevent_connection_established_get_avrcp_cid(packet); 526 if (avrcp_cid != 0 && avrcp_cid != local_cid) { 527 printf("AVRCP demo: Connection failed, expected 0x%02X l2cap cid, received 0x%02X\n", avrcp_cid, local_cid); 528 return; 529 } 530 531 status = avrcp_subevent_connection_established_get_status(packet); 532 if (status != ERROR_CODE_SUCCESS){ 533 printf("AVRCP demo: Connection failed: status 0x%02x\n", status); 534 avrcp_cid = 0; 535 return; 536 } 537 538 avrcp_cid = local_cid; 539 avrcp_connected = 1; 540 avrcp_subevent_connection_established_get_bd_addr(packet, adress); 541 printf("AVRCP demo: Channel successfully opened: %s, avrcp_cid 0x%02x\n", bd_addr_to_str(adress), avrcp_cid); 542 543 // automatically enable notifications 544 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED); 545 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED); 546 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED); 547 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 548 return; 549 } 550 case AVRCP_SUBEVENT_CONNECTION_RELEASED: 551 printf("AVRCP demo: Channel released: avrcp_cid 0x%02x\n", avrcp_subevent_connection_released_get_avrcp_cid(packet)); 552 avrcp_cid = 0; 553 avrcp_connected = 0; 554 return; 555 default: 556 break; 557 } 558 559 status = packet[5]; 560 if (!avrcp_cid) return; 561 562 // ignore INTERIM status 563 if (status == AVRCP_CTYPE_RESPONSE_INTERIM){ 564 switch (packet[2]){ 565 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED:{ 566 uint32_t playback_position_ms = avrcp_subevent_notification_playback_pos_changed_get_playback_position_ms(packet); 567 if (playback_position_ms == AVRCP_NO_TRACK_SELECTED_PLAYBACK_POSITION_CHANGED){ 568 printf("notification, playback position changed, no track is selected\n"); 569 } 570 break; 571 } 572 default: 573 printf(" INTERIM response \n"); 574 break; 575 } 576 return; 577 } 578 579 printf("AVRCP demo: command status: %s, ", avrcp_ctype2str(status)); 580 switch (packet[2]){ 581 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED: 582 printf("notification, playback position changed, position %d ms\n", (unsigned int) avrcp_subevent_notification_playback_pos_changed_get_playback_position_ms(packet)); 583 break; 584 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_STATUS_CHANGED: 585 printf("notification, playback status changed %s\n", avrcp_play_status2str(avrcp_subevent_notification_playback_status_changed_get_play_status(packet))); 586 return; 587 case AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED: 588 printf("notification, playing content changed\n"); 589 return; 590 case AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED: 591 printf("notification track changed\n"); 592 return; 593 case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED: 594 printf("notification absolute volume changed %d\n", avrcp_subevent_notification_volume_changed_get_absolute_volume(packet)); 595 return; 596 case AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED: 597 printf("notification changed\n"); 598 return; 599 case AVRCP_SUBEVENT_SHUFFLE_AND_REPEAT_MODE:{ 600 uint8_t shuffle_mode = avrcp_subevent_shuffle_and_repeat_mode_get_shuffle_mode(packet); 601 uint8_t repeat_mode = avrcp_subevent_shuffle_and_repeat_mode_get_repeat_mode(packet); 602 printf("%s, %s\n", avrcp_shuffle2str(shuffle_mode), avrcp_repeat2str(repeat_mode)); 603 break; 604 } 605 case AVRCP_SUBEVENT_NOW_PLAYING_TITLE_INFO: 606 if (avrcp_subevent_now_playing_title_info_get_value_len(packet) > 0){ 607 memcpy(value, avrcp_subevent_now_playing_title_info_get_value(packet), avrcp_subevent_now_playing_title_info_get_value_len(packet)); 608 printf(" Title: %s\n", value); 609 } 610 break; 611 612 case AVRCP_SUBEVENT_NOW_PLAYING_ARTIST_INFO: 613 if (avrcp_subevent_now_playing_artist_info_get_value_len(packet) > 0){ 614 memcpy(value, avrcp_subevent_now_playing_artist_info_get_value(packet), avrcp_subevent_now_playing_artist_info_get_value_len(packet)); 615 printf(" Artist: %s\n", value); 616 } 617 break; 618 619 case AVRCP_SUBEVENT_NOW_PLAYING_ALBUM_INFO: 620 if (avrcp_subevent_now_playing_album_info_get_value_len(packet) > 0){ 621 memcpy(value, avrcp_subevent_now_playing_album_info_get_value(packet), avrcp_subevent_now_playing_album_info_get_value_len(packet)); 622 printf(" Album: %s\n", value); 623 } 624 break; 625 626 case AVRCP_SUBEVENT_NOW_PLAYING_GENRE_INFO: 627 if (avrcp_subevent_now_playing_genre_info_get_value_len(packet) > 0){ 628 memcpy(value, avrcp_subevent_now_playing_genre_info_get_value(packet), avrcp_subevent_now_playing_genre_info_get_value_len(packet)); 629 printf(" Genre: %s\n", value); 630 } 631 break; 632 633 case AVRCP_SUBEVENT_PLAY_STATUS: 634 printf("song length: %"PRIu32" ms, song position: %"PRIu32" ms, play status: %s\n", 635 avrcp_subevent_play_status_get_song_length(packet), 636 avrcp_subevent_play_status_get_song_position(packet), 637 avrcp_play_status2str(avrcp_subevent_play_status_get_play_status(packet))); 638 break; 639 case AVRCP_SUBEVENT_OPERATION_COMPLETE: 640 printf("operation done %s\n", avrcp_operation2str(avrcp_subevent_operation_complete_get_operation_id(packet))); 641 break; 642 case AVRCP_SUBEVENT_OPERATION_START: 643 printf("operation start %s\n", avrcp_operation2str(avrcp_subevent_operation_complete_get_operation_id(packet))); 644 break; 645 case AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE: 646 // response to set shuffle and repeat mode 647 printf("\n"); 648 break; 649 default: 650 printf("AVRCP demo: event is not parsed\n"); 651 break; 652 } 653 } 654 655 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 656 UNUSED(channel); 657 UNUSED(size); 658 if (packet_type != HCI_EVENT_PACKET) return; 659 if (hci_event_packet_get_type(packet) == HCI_EVENT_PIN_CODE_REQUEST) { 660 bd_addr_t address; 661 printf("Pin code request - using '0000'\n"); 662 hci_event_pin_code_request_get_bd_addr(packet, address); 663 gap_pin_code_response(address, "0000"); 664 } 665 } 666 667 static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 668 UNUSED(channel); 669 UNUSED(size); 670 uint16_t cid; 671 bd_addr_t address; 672 uint8_t status; 673 674 if (packet_type != HCI_EVENT_PACKET) return; 675 if (hci_event_packet_get_type(packet) != HCI_EVENT_A2DP_META) return; 676 677 switch (packet[2]){ 678 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 679 printf("A2DP Sink demo: received non SBC codec. not implemented.\n"); 680 break; 681 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 682 printf("A2DP Sink demo: received SBC codec configuration.\n"); 683 sbc_configuration.reconfigure = a2dp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 684 sbc_configuration.num_channels = a2dp_subevent_signaling_media_codec_sbc_configuration_get_num_channels(packet); 685 sbc_configuration.sampling_frequency = a2dp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 686 sbc_configuration.channel_mode = a2dp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); 687 sbc_configuration.block_length = a2dp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 688 sbc_configuration.subbands = a2dp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 689 sbc_configuration.allocation_method = a2dp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 690 sbc_configuration.min_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 691 sbc_configuration.max_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 692 sbc_configuration.frames_per_buffer = sbc_configuration.subbands * sbc_configuration.block_length; 693 dump_sbc_configuration(sbc_configuration); 694 695 if (sbc_configuration.reconfigure){ 696 media_processing_close(); 697 } 698 // prepare media processing 699 media_processing_init(sbc_configuration); 700 break; 701 } 702 case A2DP_SUBEVENT_STREAM_ESTABLISHED: 703 a2dp_subevent_stream_established_get_bd_addr(packet, address); 704 status = a2dp_subevent_stream_established_get_status(packet); 705 cid = a2dp_subevent_stream_established_get_a2dp_cid(packet); 706 printf("A2DP_SUBEVENT_STREAM_ESTABLISHED %d, %d \n", cid, a2dp_cid); 707 if (!a2dp_cid){ 708 // incoming connection 709 a2dp_cid = cid; 710 } else if (cid != a2dp_cid) { 711 break; 712 } 713 if (status){ 714 a2dp_sink_connected = 0; 715 printf("A2DP Sink demo: streaming connection failed, status 0x%02x\n", status); 716 break; 717 } 718 printf("A2DP Sink demo: streaming connection is established, address %s, a2dp cid 0x%02X, local_seid %d\n", bd_addr_to_str(address), a2dp_cid, local_seid); 719 720 memcpy(device_addr, address, 6); 721 722 local_seid = a2dp_subevent_stream_established_get_local_seid(packet); 723 a2dp_sink_connected = 1; 724 break; 725 726 case A2DP_SUBEVENT_STREAM_STARTED: 727 cid = a2dp_subevent_stream_started_get_a2dp_cid(packet); 728 if (cid != a2dp_cid) break; 729 local_seid = a2dp_subevent_stream_started_get_local_seid(packet); 730 printf("A2DP Sink demo: stream started, a2dp cid 0x%02X, local_seid %d\n", a2dp_cid, local_seid); 731 // started 732 media_processing_init(sbc_configuration); 733 break; 734 735 case A2DP_SUBEVENT_STREAM_SUSPENDED: 736 cid = a2dp_subevent_stream_suspended_get_a2dp_cid(packet); 737 if (cid != a2dp_cid) break; 738 local_seid = a2dp_subevent_stream_suspended_get_local_seid(packet); 739 printf("A2DP Sink demo: stream paused, a2dp cid 0x%02X, local_seid %d\n", a2dp_cid, local_seid); 740 media_processing_close(); 741 break; 742 743 case A2DP_SUBEVENT_STREAM_RELEASED: 744 local_seid = a2dp_subevent_stream_released_get_local_seid(packet); 745 printf("A2DP Sink demo: stream released, a2dp cid 0x%02X, local_seid %d\n", a2dp_cid, local_seid); 746 media_processing_close(); 747 break; 748 case A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 749 cid = a2dp_subevent_signaling_connection_released_get_a2dp_cid(packet); 750 a2dp_sink_connected = 0; 751 printf("A2DP Sink demo: signaling connection released\n"); 752 media_processing_close(); 753 break; 754 default: 755 printf("A2DP Sink demo: not parsed 0x%02x\n", packet[2]); 756 break; 757 } 758 } 759 760 #ifdef HAVE_BTSTACK_STDIN 761 static void show_usage(void){ 762 bd_addr_t iut_address; 763 gap_local_bd_addr(iut_address); 764 printf("\n--- Bluetooth AVDTP Sink/AVRCP Connection Test Console %s ---\n", bd_addr_to_str(iut_address)); 765 printf("b - AVDTP Sink create connection to addr %s\n", bd_addr_to_str(device_addr)); 766 printf("B - AVDTP Sink disconnect\n"); 767 printf("c - AVRCP create connection to addr %s\n", bd_addr_to_str(device_addr)); 768 printf("C - AVRCP disconnect\n"); 769 770 printf("\n--- Bluetooth AVRCP Commands %s ---\n", bd_addr_to_str(iut_address)); 771 printf("O - get play status\n"); 772 printf("j - get now playing info\n"); 773 printf("k - play\n"); 774 printf("K - stop\n"); 775 printf("L - pause\n"); 776 printf("u - start fast forward\n"); 777 printf("U - stop fast forward\n"); 778 printf("n - start rewind\n"); 779 printf("N - stop rewind\n"); 780 printf("i - forward\n"); 781 printf("I - backward\n"); 782 printf("t - volume up\n"); 783 printf("T - volume down\n"); 784 printf("p - absolute volume of 50 percent\n"); 785 printf("M - mute\n"); 786 printf("r - skip\n"); 787 printf("q - query repeat and shuffle mode\n"); 788 printf("v - repeat single track\n"); 789 printf("x - repeat all tracks\n"); 790 printf("X - disable repeat mode\n"); 791 printf("z - shuffle all tracks\n"); 792 printf("Z - disable shuffle mode\n"); 793 794 printf("a/A - register/deregister TRACK_CHANGED\n"); 795 printf("d/D - register/deregister PLAYBACK_POS_CHANGED\n"); 796 797 printf("---\n"); 798 } 799 #endif 800 801 #ifdef HAVE_BTSTACK_STDIN 802 static void stdin_process(char cmd){ 803 uint8_t status = ERROR_CODE_SUCCESS; 804 if (!avrcp_connected){ 805 switch (cmd){ 806 case 'b': 807 case 'c': 808 break; 809 case '\n': 810 case '\r': 811 case ' ': 812 show_usage(); 813 return; 814 default: 815 printf("Not connected. Please use 'c' to establish an AVRCP connection with device (addr %s).\n", bd_addr_to_str(device_addr)); 816 return; 817 } 818 } 819 820 switch (cmd){ 821 case 'b': 822 status = a2dp_sink_establish_stream(device_addr, local_seid, &a2dp_cid); 823 printf(" - Create AVDTP connection to addr %s, and local seid %d, expected cid 0x%02x.\n", bd_addr_to_str(device_addr), local_seid, a2dp_cid); 824 break; 825 case 'B': 826 printf(" - AVDTP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 827 status = avdtp_sink_disconnect(a2dp_cid); 828 break; 829 case 'c': 830 printf(" - Create AVRCP connection to addr %s.\n", bd_addr_to_str(device_addr)); 831 status = avrcp_controller_connect(device_addr, &avrcp_cid); 832 break; 833 case 'C': 834 printf(" - AVRCP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 835 status = avrcp_controller_disconnect(avrcp_cid); 836 break; 837 838 case '\n': 839 case '\r': 840 break; 841 case 'O': 842 printf(" - get play status\n"); 843 status = avrcp_controller_get_play_status(avrcp_cid); 844 break; 845 case 'j': 846 printf(" - get now playing info\n"); 847 status = avrcp_controller_get_now_playing_info(avrcp_cid); 848 break; 849 case 'k': 850 printf(" - play\n"); 851 status = avrcp_controller_play(avrcp_cid); 852 break; 853 case 'K': 854 printf(" - stop\n"); 855 status = avrcp_controller_stop(avrcp_cid); 856 break; 857 case 'L': 858 printf(" - pause\n"); 859 status = avrcp_controller_pause(avrcp_cid); 860 break; 861 case 'u': 862 printf(" - start fast forward\n"); 863 status = avrcp_controller_press_and_hold_fast_forward(avrcp_cid); 864 break; 865 case 'U': 866 printf(" - stop fast forward\n"); 867 status = avrcp_controller_release_press_and_hold_cmd(avrcp_cid); 868 break; 869 case 'n': 870 printf(" - start rewind\n"); 871 status = avrcp_controller_press_and_hold_rewind(avrcp_cid); 872 break; 873 case 'N': 874 printf(" - stop rewind\n"); 875 status = avrcp_controller_release_press_and_hold_cmd(avrcp_cid); 876 break; 877 case 'i': 878 printf(" - forward\n"); 879 status = avrcp_controller_forward(avrcp_cid); 880 break; 881 case 'I': 882 printf(" - backward\n"); 883 status = avrcp_controller_backward(avrcp_cid); 884 break; 885 case 't': 886 printf(" - volume up\n"); 887 status = avrcp_controller_volume_up(avrcp_cid); 888 break; 889 case 'T': 890 printf(" - volume down\n"); 891 status = avrcp_controller_volume_down(avrcp_cid); 892 break; 893 case 'p': 894 printf(" - absolute volume of 50 percent\n"); 895 status = avrcp_controller_set_absolute_volume(avrcp_cid, 50); 896 break; 897 case 'M': 898 printf(" - mute\n"); 899 status = avrcp_controller_mute(avrcp_cid); 900 break; 901 case 'r': 902 printf(" - skip\n"); 903 status = avrcp_controller_skip(avrcp_cid); 904 break; 905 case 'q': 906 printf(" - query repeat and shuffle mode\n"); 907 status = avrcp_controller_query_shuffle_and_repeat_modes(avrcp_cid); 908 break; 909 case 'v': 910 printf(" - repeat single track\n"); 911 status = avrcp_controller_set_repeat_mode(avrcp_cid, AVRCP_REPEAT_MODE_SINGLE_TRACK); 912 break; 913 case 'x': 914 printf(" - repeat all tracks\n"); 915 status = avrcp_controller_set_repeat_mode(avrcp_cid, AVRCP_REPEAT_MODE_ALL_TRACKS); 916 break; 917 case 'X': 918 printf(" - disable repeat mode\n"); 919 status = avrcp_controller_set_repeat_mode(avrcp_cid, AVRCP_REPEAT_MODE_OFF); 920 break; 921 case 'z': 922 printf(" - shuffle all tracks\n"); 923 status = avrcp_controller_set_shuffle_mode(avrcp_cid, AVRCP_SHUFFLE_MODE_ALL_TRACKS); 924 break; 925 case 'Z': 926 printf(" - disable shuffle mode\n"); 927 status = avrcp_controller_set_shuffle_mode(avrcp_cid, AVRCP_SHUFFLE_MODE_OFF); 928 break; 929 case 'a': 930 printf("AVRCP: enable notification TRACK_CHANGED\n"); 931 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 932 break; 933 case 'A': 934 printf("AVRCP: disable notification TRACK_CHANGED\n"); 935 avrcp_controller_disable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 936 break; 937 case 'd': 938 printf("AVRCP: enable notification PLAYBACK_POS_CHANGED\n"); 939 avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 940 break; 941 case 'D': 942 printf("AVRCP: disable notification PLAYBACK_POS_CHANGED\n"); 943 avrcp_controller_disable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 944 break; 945 946 default: 947 show_usage(); 948 return; 949 } 950 if (status != ERROR_CODE_SUCCESS){ 951 printf("Could not perform command, status 0x%2x\n", status); 952 } 953 } 954 #endif 955 956 int btstack_main(int argc, const char * argv[]); 957 int btstack_main(int argc, const char * argv[]){ 958 UNUSED(argc); 959 (void)argv; 960 961 a2dp_and_avrcp_setup(); 962 963 #ifdef HAVE_BTSTACK_STDIN 964 // parse human readable Bluetooth address 965 sscanf_bd_addr(device_addr_string, device_addr); 966 btstack_stdin_setup(stdin_process); 967 #endif 968 969 // turn on! 970 printf("Starting BTstack ...\n"); 971 hci_power_control(HCI_POWER_ON); 972 return 0; 973 } 974