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