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 BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "a2dp_sink_demo.c" 39 40 /* 41 * a2dp_sink_demo.c 42 */ 43 44 // ***************************************************************************** 45 /* EXAMPLE_START(a2dp_sink_demo): A2DP Sink - Receive Audio Stream and Control Playback 46 * 47 * @text This A2DP Sink example demonstrates how to use the A2DP Sink service to 48 * receive an audio data stream from a remote A2DP Source device. In addition, 49 * the AVRCP Controller is used to get information on currently played media, 50 * such are title, artist and album, as well as to control the playback, 51 * i.e. to play, stop, repeat, etc. If HAVE_BTSTACK_STDIN is set, press SPACE on 52 * the console to show the available AVDTP and AVRCP commands. 53 * 54 * @text To test with a remote device, e.g. a mobile phone, 55 * pair from the remote device with the demo, then start playing music on the remote device. 56 * Alternatively, set the device_addr_string to the Bluetooth address of your 57 * remote device in the code, and call connect from the UI. 58 * 59 * @text For more info on BTstack audio, see our blog post 60 * [A2DP Sink and Source on STM32 F4 Discovery Board](http://bluekitchen-gmbh.com/a2dp-sink-and-source-on-stm32-f4-discovery-board/). 61 * 62 */ 63 // ***************************************************************************** 64 65 #include <inttypes.h> 66 #include <stdint.h> 67 #include <stdio.h> 68 #include <string.h> 69 70 #include "btstack.h" 71 #include "btstack_resample.h" 72 73 //#define AVRCP_BROWSING_ENABLED 74 75 #ifdef HAVE_BTSTACK_STDIN 76 #include "btstack_stdin.h" 77 #endif 78 79 #include "btstack_ring_buffer.h" 80 81 #ifdef HAVE_POSIX_FILE_IO 82 #include "wav_util.h" 83 #define STORE_TO_WAV_FILE 84 #endif 85 86 #define NUM_CHANNELS 2 87 #define BYTES_PER_FRAME (2*NUM_CHANNELS) 88 #define MAX_SBC_FRAME_SIZE 120 89 90 #ifdef HAVE_BTSTACK_STDIN 91 static const char * device_addr_string = "5C:F3:70:60:7B:87"; // pts 92 static bd_addr_t device_addr; 93 #endif 94 95 static btstack_packet_callback_registration_t hci_event_callback_registration; 96 97 static uint8_t sdp_avdtp_sink_service_buffer[150]; 98 static uint8_t sdp_avrcp_target_service_buffer[150]; 99 static uint8_t sdp_avrcp_controller_service_buffer[200]; 100 static uint8_t device_id_sdp_service_buffer[100]; 101 102 // we support all configurations with bitpool 2-53 103 static uint8_t media_sbc_codec_capabilities[] = { 104 0xFF,//(AVDTP_SBC_44100 << 4) | AVDTP_SBC_STEREO, 105 0xFF,//(AVDTP_SBC_BLOCK_LENGTH_16 << 4) | (AVDTP_SBC_SUBBANDS_8 << 2) | AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS, 106 2, 53 107 }; 108 109 // WAV File 110 #ifdef STORE_TO_WAV_FILE 111 static uint32_t audio_frame_count = 0; 112 static char * wav_filename = "a2dp_sink_demo.wav"; 113 #endif 114 115 // SBC Decoder for WAV file or live playback 116 static btstack_sbc_decoder_state_t state; 117 static btstack_sbc_mode_t mode = SBC_MODE_STANDARD; 118 119 // ring buffer for SBC Frames 120 // below 30: add samples, 30-40: fine, above 40: drop samples 121 #define OPTIMAL_FRAMES_MIN 60 122 #define OPTIMAL_FRAMES_MAX 80 123 #define ADDITIONAL_FRAMES 20 124 static uint8_t sbc_frame_storage[(OPTIMAL_FRAMES_MAX + ADDITIONAL_FRAMES) * MAX_SBC_FRAME_SIZE]; 125 static btstack_ring_buffer_t sbc_frame_ring_buffer; 126 static unsigned int sbc_frame_size; 127 128 // overflow buffer for not fully used sbc frames, with additional frames for resampling 129 static uint8_t decoded_audio_storage[(128+16) * BYTES_PER_FRAME]; 130 static btstack_ring_buffer_t decoded_audio_ring_buffer; 131 132 static int media_initialized = 0; 133 static int audio_stream_started; 134 static btstack_resample_t resample_instance; 135 136 // temp storage of lower-layer request for audio samples 137 static int16_t * request_buffer; 138 static int request_frames; 139 140 // sink state 141 static int volume_percentage = 0; 142 static avrcp_battery_status_t battery_status = AVRCP_BATTERY_STATUS_WARNING; 143 144 typedef struct { 145 uint8_t reconfigure; 146 uint8_t num_channels; 147 uint16_t sampling_frequency; 148 uint8_t block_length; 149 uint8_t subbands; 150 uint8_t min_bitpool_value; 151 uint8_t max_bitpool_value; 152 btstack_sbc_channel_mode_t channel_mode; 153 btstack_sbc_allocation_method_t allocation_method; 154 } media_codec_configuration_sbc_t; 155 156 typedef enum { 157 STREAM_STATE_CLOSED, 158 STREAM_STATE_OPEN, 159 STREAM_STATE_PLAYING, 160 STREAM_STATE_PAUSED, 161 } stream_state_t; 162 163 typedef struct { 164 uint8_t a2dp_local_seid; 165 uint8_t media_sbc_codec_configuration[4]; 166 } a2dp_sink_demo_stream_endpoint_t; 167 static a2dp_sink_demo_stream_endpoint_t a2dp_sink_demo_stream_endpoint; 168 169 typedef struct { 170 bd_addr_t addr; 171 uint16_t a2dp_cid; 172 uint8_t a2dp_local_seid; 173 stream_state_t stream_state; 174 media_codec_configuration_sbc_t sbc_configuration; 175 } a2dp_sink_demo_a2dp_connection_t; 176 static a2dp_sink_demo_a2dp_connection_t a2dp_sink_demo_a2dp_connection; 177 178 typedef struct { 179 bd_addr_t addr; 180 uint16_t avrcp_cid; 181 bool playing; 182 } a2dp_sink_demo_avrcp_connection_t; 183 static a2dp_sink_demo_avrcp_connection_t a2dp_sink_demo_avrcp_connection; 184 185 /* @section Main Application Setup 186 * 187 * @text The Listing MainConfiguration shows how to set up AD2P Sink and AVRCP services. 188 * Besides calling init() method for each service, you'll also need to register several packet handlers: 189 * - hci_packet_handler - handles legacy pairing, here by using fixed '0000' pin code. 190 * - 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). 191 * - 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. 192 * - avrcp_packet_handler - receives connect/disconnect event. 193 * - avrcp_controller_packet_handler - receives answers for sent AVRCP commands. 194 * - avrcp_target_packet_handler - receives AVRCP commands, and registered notifications. 195 * - 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. 196 * 197 * @text To announce A2DP Sink and AVRCP services, you need to create corresponding 198 * SDP records and register them with the SDP service. 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_TO_WAV_FILE. 202 * 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. 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 in a wav file if STORE_TO_WAV_FILE is defined, and/or played using the audio library. 205 */ 206 207 /* LISTING_START(MainConfiguration): Setup Audio Sink and AVRCP services */ 208 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 209 static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * packet, uint16_t event_size); 210 static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size); 211 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 212 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 213 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 214 #ifdef HAVE_BTSTACK_STDIN 215 static void stdin_process(char cmd); 216 #endif 217 218 static int a2dp_and_avrcp_setup(void){ 219 220 l2cap_init(); 221 222 #ifdef ENABLE_BLE 223 // Initialize LE Security Manager. Needed for cross-transport key derivation 224 sm_init(); 225 #endif 226 227 // Initialize AVDTP Sink 228 a2dp_sink_init(); 229 a2dp_sink_register_packet_handler(&a2dp_sink_packet_handler); 230 a2dp_sink_register_media_handler(&handle_l2cap_media_data_packet); 231 232 // Create stream endpoint 233 a2dp_sink_demo_stream_endpoint_t * stream_endpoint = &a2dp_sink_demo_stream_endpoint; 234 avdtp_stream_endpoint_t * local_stream_endpoint = a2dp_sink_create_stream_endpoint(AVDTP_AUDIO, 235 AVDTP_CODEC_SBC, media_sbc_codec_capabilities, sizeof(media_sbc_codec_capabilities), 236 stream_endpoint->media_sbc_codec_configuration, sizeof(stream_endpoint->media_sbc_codec_configuration)); 237 if (!local_stream_endpoint){ 238 printf("A2DP Sink: not enough memory to create local stream endpoint\n"); 239 return 1; 240 } 241 242 // Store stream enpoint's SEP ID, as it is used by A2DP API to identify the stream endpoint 243 stream_endpoint->a2dp_local_seid = avdtp_local_seid(local_stream_endpoint); 244 245 // Initialize AVRCP service 246 avrcp_init(); 247 avrcp_register_packet_handler(&avrcp_packet_handler); 248 249 // Initialize AVRCP Controller 250 avrcp_controller_init(); 251 avrcp_controller_register_packet_handler(&avrcp_controller_packet_handler); 252 253 // Initialize AVRCP Target 254 avrcp_target_init(); 255 avrcp_target_register_packet_handler(&avrcp_target_packet_handler); 256 257 // Initialize SDP 258 sdp_init(); 259 260 // Create A2DP Sink service record and register it with SDP 261 memset(sdp_avdtp_sink_service_buffer, 0, sizeof(sdp_avdtp_sink_service_buffer)); 262 a2dp_sink_create_sdp_record(sdp_avdtp_sink_service_buffer, 0x10001, AVDTP_SINK_FEATURE_MASK_HEADPHONE, NULL, NULL); 263 sdp_register_service(sdp_avdtp_sink_service_buffer); 264 265 // Create AVRCP Controller service record and register it with SDP. We send Category 1 commands to the media player, e.g. play/pause 266 memset(sdp_avrcp_controller_service_buffer, 0, sizeof(sdp_avrcp_controller_service_buffer)); 267 uint16_t controller_supported_features = AVRCP_FEATURE_MASK_CATEGORY_PLAYER_OR_RECORDER; 268 #ifdef AVRCP_BROWSING_ENABLED 269 controller_supported_features |= AVRCP_FEATURE_MASK_BROWSING; 270 #endif 271 avrcp_controller_create_sdp_record(sdp_avrcp_controller_service_buffer, 0x10002, controller_supported_features, NULL, NULL); 272 sdp_register_service(sdp_avrcp_controller_service_buffer); 273 274 // Create AVRCP Target service record and register it with SDP. We receive Category 2 commands from the media player, e.g. volume up/down 275 memset(sdp_avrcp_target_service_buffer, 0, sizeof(sdp_avrcp_target_service_buffer)); 276 uint16_t target_supported_features = AVRCP_FEATURE_MASK_CATEGORY_MONITOR_OR_AMPLIFIER; 277 avrcp_target_create_sdp_record(sdp_avrcp_target_service_buffer, 0x10003, target_supported_features, NULL, NULL); 278 sdp_register_service(sdp_avrcp_target_service_buffer); 279 280 // Create Device ID (PnP) service record and register it with SDP 281 memset(device_id_sdp_service_buffer, 0, sizeof(device_id_sdp_service_buffer)); 282 device_id_create_sdp_record(device_id_sdp_service_buffer, 0x10004, DEVICE_ID_VENDOR_ID_SOURCE_BLUETOOTH, BLUETOOTH_COMPANY_ID_BLUEKITCHEN_GMBH, 1, 1); 283 sdp_register_service(device_id_sdp_service_buffer); 284 285 // Set local name with a template Bluetooth address, that will be automatically 286 // replaced with an actual address once it is available, i.e. when BTstack boots 287 // up and starts talking to a Bluetooth module. 288 gap_set_local_name("A2DP Sink Demo 00:00:00:00:00:00"); 289 290 // allot to show up in Bluetooth inquiry 291 gap_discoverable_control(1); 292 293 // Service Class: Audio, Major Device Class: Audio, Minor: Loudspeaker 294 gap_set_class_of_device(0x200414); 295 296 // allow for role switch in general and sniff mode 297 gap_set_default_link_policy_settings( LM_LINK_POLICY_ENABLE_ROLE_SWITCH | LM_LINK_POLICY_ENABLE_SNIFF_MODE ); 298 299 // allow for role switch on outgoing connections - this allows A2DP Source, e.g. smartphone, to become master when we re-connect to it 300 gap_set_allow_role_switch(true); 301 302 // Register for HCI events 303 hci_event_callback_registration.callback = &hci_packet_handler; 304 hci_add_event_handler(&hci_event_callback_registration); 305 306 #ifdef HAVE_POSIX_FILE_IO 307 if (!btstack_audio_sink_get_instance()){ 308 printf("No audio playback.\n"); 309 } else { 310 printf("Audio playback supported.\n"); 311 } 312 #ifdef STORE_TO_WAV_FILE 313 printf("Audio will be stored to \'%s\' file.\n", wav_filename); 314 #endif 315 #endif 316 return 0; 317 } 318 /* LISTING_END */ 319 320 #define FTOQ15(a) ((signed)((a)*(UINT16_C(1)<<15)+0.5f)) 321 #define FTOQ8(a) ((signed)((a)*(UINT16_C(1)<<8)+0.5f)) 322 #define FTOQ7(a) ((signed)((a)*(UINT16_C(1)<<7)+0.5f)) 323 324 #define Q16TOF(a) ((float)(a)/(UINT32_C(1)<<16)) 325 #define Q15TOF(a) ((float)(a)/(UINT32_C(1)<<15)) 326 #define Q8TOF(a) ((float)(a)/(UINT32_C(1)<<8)) 327 #define Q7TOF(a) ((float)(a)/(UINT32_C(1)<<7)) 328 329 #define DEBUG_RATIO_CALCULATION 330 331 typedef struct { 332 uint32_t count; // 17bit are usable to count samples, recommended for max 96kHz 333 uint32_t last; // time stamp of last measurement 334 uint32_t rate_state; // unsigned Q17.8 335 uint32_t ratio_state; // unsigned Q16.16 336 uint32_t constant_playback_sample_rate; // playback sample rate if no real one is available 337 #ifdef DEBUG_RATIO_CALCULATION 338 double sample_rate; 339 double ratio; 340 #endif 341 } ratio_measure_t; 342 343 #define RATE_SCALE (8) 344 #define RATIO_SCALE (16) 345 346 static void ratio_measure_reset( ratio_measure_t *me ); 347 static void ratio_measure_init( ratio_measure_t *me, uint32_t sample_rate, uint32_t ratioQ15 ); 348 static void ratio_measure_update( ratio_measure_t *me, uint32_t samples ); 349 350 static void ratio_measure_reset( ratio_measure_t *me ) { 351 me->count = 0; 352 me->last = 0; 353 } 354 355 static void ratio_measure_init( ratio_measure_t *me, uint32_t sample_rate, uint32_t ratioQ15 ) { 356 ratio_measure_reset( me ); 357 me->ratio_state = ratioQ15 << 1; // Q15 to Q16 is one left shift 358 me->rate_state = sample_rate << RATE_SCALE; 359 #ifdef DEBUG_RATIO_CALCULATION 360 me->ratio = Q15TOF(ratioQ15); 361 me->sample_rate = sample_rate; 362 #endif 363 } 364 365 static void ratio_measure_update( ratio_measure_t *me, uint32_t samples ) { 366 if( me->last == 0 ) { 367 me->count = 0; 368 me->last = btstack_run_loop_get_time_ms(); 369 } 370 371 uint32_t current = btstack_run_loop_get_time_ms(); 372 int32_t delta = current - me->last; 373 if( delta >= 1000 ) { 374 const btstack_audio_sink_t * audio_sink = btstack_audio_sink_get_instance(); 375 uint32_t playback_sample_rate = me->constant_playback_sample_rate; 376 377 // update playback sample rate if we know better 378 if (audio_sink){ 379 playback_sample_rate = audio_sink->get_samplerate(); 380 } 381 printf("current playback sample rate: %d\n", playback_sample_rate ); 382 383 #ifdef DEBUG_RATIO_CALCULATION 384 { 385 double current_sample_rate = me->count*(1000./delta); 386 double current_ratio = me->sample_rate/playback_sample_rate; 387 388 // exponential weighted moving average 389 const double rate_decay = 0.025; 390 me->sample_rate += rate_decay * (current_sample_rate-me->sample_rate); 391 392 // exponential weighted moving average 393 static const double ratio_decay = 1.3; 394 me->ratio += ratio_decay * (current_ratio-me->ratio); 395 396 log_debug("current l2cap sample rate: %f (%d %d)", current_sample_rate, delta, me->count ); 397 log_debug("current ratio: %f", current_ratio); 398 log_debug("calculated ratio: %f", me->ratio ); 399 } 400 #endif 401 uint32_t fixed_rate = (me->count*(UINT16_C(1)<<15))/delta*1000; // sample rate as Q15 402 uint32_t fixed_ratio = (me->rate_state<<7)/playback_sample_rate; // Q15 403 printf("fp current l2cap sample rate: %f (%d %d)\n", Q15TOF(fixed_rate), delta, me->count); 404 405 me->last = current; 406 me->count = 0; 407 if( fixed_rate > FTOQ15(50000.f) ) 408 goto no_adaption; 409 410 // fixed point exponential weighted moving average 411 const int16_t rate_decay = FTOQ15(0.025f); 412 uint32_t rate = me->rate_state >> 8; // integer part only 413 me->rate_state += (rate_decay * (int32_t)((fixed_rate>>15)-rate)) >> (15-8); // Q8; 414 415 // fixed point exponential weighted moving average 416 const int16_t ratio_decay = FTOQ8(1.3f); 417 me->ratio_state += (ratio_decay * (int32_t)((fixed_ratio<<1)-me->ratio_state)) >> (16-8); // Q16 418 419 printf("sbc buffer level : %d\n", btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer)); 420 printf("fp current ratio : %f\n", Q15TOF(fixed_ratio)); 421 printf("fp calculated ratio: %f\n", Q16TOF(me->ratio_state)); 422 uint32_t scaleQ16 = me->ratio_state; 423 printf("scale factor Q16: %d\n", scaleQ16); 424 btstack_resample_set_factor(&resample_instance, scaleQ16); 425 426 } 427 no_adaption: 428 me->count += samples; 429 430 } 431 432 ratio_measure_t sample_rate_adaption; 433 434 static void playback_handler(int16_t * buffer, uint16_t num_audio_frames){ 435 436 #ifdef STORE_TO_WAV_FILE 437 int wav_samples = num_audio_frames * NUM_CHANNELS; 438 int16_t * wav_buffer = buffer; 439 #endif 440 441 // called from lower-layer but guaranteed to be on main thread 442 if (sbc_frame_size == 0){ 443 memset(buffer, 0, num_audio_frames * BYTES_PER_FRAME); 444 return; 445 } 446 447 // first fill from resampled audio 448 uint32_t bytes_read; 449 btstack_ring_buffer_read(&decoded_audio_ring_buffer, (uint8_t *) buffer, num_audio_frames * BYTES_PER_FRAME, &bytes_read); 450 buffer += bytes_read / NUM_CHANNELS; 451 num_audio_frames -= bytes_read / BYTES_PER_FRAME; 452 453 // then start decoding sbc frames using request_* globals 454 request_buffer = buffer; 455 request_frames = num_audio_frames; 456 while (request_frames && btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) >= sbc_frame_size){ 457 // decode frame 458 uint8_t sbc_frame[MAX_SBC_FRAME_SIZE]; 459 btstack_ring_buffer_read(&sbc_frame_ring_buffer, sbc_frame, sbc_frame_size, &bytes_read); 460 btstack_sbc_decoder_process_data(&state, 0, sbc_frame, sbc_frame_size); 461 } 462 463 #ifdef STORE_TO_WAV_FILE 464 audio_frame_count += num_audio_frames; 465 wav_writer_write_int16(wav_samples, wav_buffer); 466 #endif 467 } 468 469 static void handle_pcm_data(int16_t * data, int num_audio_frames, int num_channels, int sample_rate, void * context){ 470 UNUSED(sample_rate); 471 UNUSED(context); 472 UNUSED(num_channels); // must be stereo == 2 473 474 const btstack_audio_sink_t * audio_sink = btstack_audio_sink_get_instance(); 475 if (!audio_sink){ 476 #ifdef STORE_TO_WAV_FILE 477 audio_frame_count += num_audio_frames; 478 wav_writer_write_int16(num_audio_frames * NUM_CHANNELS, data); 479 #endif 480 return; 481 } 482 483 // resample into request buffer - add some additional space for resampling 484 int16_t output_buffer[(128+16) * NUM_CHANNELS]; // 16 * 8 * 2 485 uint32_t resampled_frames = btstack_resample_block(&resample_instance, data, num_audio_frames, output_buffer); 486 487 // store data in btstack_audio buffer first 488 int frames_to_copy = btstack_min(resampled_frames, request_frames); 489 memcpy(request_buffer, output_buffer, frames_to_copy * BYTES_PER_FRAME); 490 request_frames -= frames_to_copy; 491 request_buffer += frames_to_copy * NUM_CHANNELS; 492 493 // and rest in ring buffer 494 int frames_to_store = resampled_frames - frames_to_copy; 495 if (frames_to_store){ 496 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); 497 if (status){ 498 printf("Error storing samples in PCM ring buffer!!!\n"); 499 } 500 } 501 } 502 503 static int media_processing_init(media_codec_configuration_sbc_t * configuration){ 504 if (media_initialized) return 0; 505 506 ratio_measure_init( &sample_rate_adaption, configuration->sampling_frequency, FTOQ15(1.f) ); 507 508 btstack_sbc_decoder_init(&state, mode, handle_pcm_data, NULL); 509 510 #ifdef STORE_TO_WAV_FILE 511 wav_writer_open(wav_filename, configuration->num_channels, configuration->sampling_frequency); 512 #endif 513 514 btstack_ring_buffer_init(&sbc_frame_ring_buffer, sbc_frame_storage, sizeof(sbc_frame_storage)); 515 btstack_ring_buffer_init(&decoded_audio_ring_buffer, decoded_audio_storage, sizeof(decoded_audio_storage)); 516 btstack_resample_init(&resample_instance, configuration->num_channels); 517 518 // setup audio playback 519 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 520 if (audio){ 521 audio->init(NUM_CHANNELS, configuration->sampling_frequency, &playback_handler); 522 } 523 524 audio_stream_started = 0; 525 media_initialized = 1; 526 return 0; 527 } 528 529 static void media_processing_start(void){ 530 if (!media_initialized) return; 531 532 ratio_measure_reset( &sample_rate_adaption ); 533 // setup audio playback 534 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 535 if (audio){ 536 audio->start_stream(); 537 } 538 audio_stream_started = 1; 539 } 540 541 static void media_processing_pause(void){ 542 if (!media_initialized) return; 543 // stop audio playback 544 audio_stream_started = 0; 545 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 546 if (audio){ 547 audio->stop_stream(); 548 } 549 // discard pending data 550 btstack_ring_buffer_reset(&decoded_audio_ring_buffer); 551 btstack_ring_buffer_reset(&sbc_frame_ring_buffer); 552 } 553 554 static void media_processing_close(void){ 555 if (!media_initialized) return; 556 media_initialized = 0; 557 audio_stream_started = 0; 558 sbc_frame_size = 0; 559 560 #ifdef STORE_TO_WAV_FILE 561 wav_writer_close(); 562 uint32_t total_frames_nr = state.good_frames_nr + state.bad_frames_nr + state.zero_frames_nr; 563 564 printf("WAV Writer: Decoding done. Processed %u SBC frames:\n - %d good\n - %d bad\n", total_frames_nr, state.good_frames_nr, total_frames_nr - state.good_frames_nr); 565 printf("WAV Writer: Wrote %u audio frames to wav file: %s\n", audio_frame_count, wav_filename); 566 #endif 567 568 // stop audio playback 569 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 570 if (audio){ 571 printf("close stream\n"); 572 audio->close(); 573 } 574 } 575 576 /* @section Handle Media Data Packet 577 * 578 * @text Here the audio data, are received through the handle_l2cap_media_data_packet callback. 579 * Currently, only the SBC media codec is supported. Hence, the media data consists of the media packet header and the SBC packet. 580 * 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). 581 * If the audio stream wasn't started already and there are enough SBC frames in the ring buffer, start playback. 582 */ 583 584 static int read_media_data_header(uint8_t * packet, int size, int * offset, avdtp_media_packet_header_t * media_header); 585 static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header); 586 587 static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size){ 588 UNUSED(seid); 589 int pos = 0; 590 591 avdtp_media_packet_header_t media_header; 592 if (!read_media_data_header(packet, size, &pos, &media_header)) return; 593 594 avdtp_sbc_codec_header_t sbc_header; 595 if (!read_sbc_header(packet, size, &pos, &sbc_header)) return; 596 597 // update sample rate compensation 598 if( audio_stream_started ) { 599 ratio_measure_update( &sample_rate_adaption, sbc_header.num_frames*128 ); 600 } 601 602 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 603 // process data right away if there's no audio implementation active, e.g. on posix systems to store as .wav 604 if (!audio){ 605 btstack_sbc_decoder_process_data(&state, 0, packet+pos, size-pos); 606 return; 607 } 608 609 // store sbc frame size for buffer management 610 sbc_frame_size = (size-pos)/ sbc_header.num_frames; 611 612 int status = btstack_ring_buffer_write(&sbc_frame_ring_buffer, packet+pos, size-pos); 613 if (status != ERROR_CODE_SUCCESS){ 614 printf("Error storing samples in SBC ring buffer!!!\n"); 615 } 616 617 // decide on audio sync drift based on number of sbc frames in queue 618 int sbc_frames_in_buffer = btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) / sbc_frame_size; 619 #if 0 620 uint32_t resampling_factor; 621 622 // nominal factor (fixed-point 2^16) and compensation offset 623 uint32_t nominal_factor = 0x10000; 624 uint32_t compensation = 0x00100; 625 626 if (sbc_frames_in_buffer < OPTIMAL_FRAMES_MIN){ 627 resampling_factor = nominal_factor - compensation; // stretch samples 628 } else if (sbc_frames_in_buffer <= OPTIMAL_FRAMES_MAX){ 629 resampling_factor = nominal_factor; // nothing to do 630 } else { 631 resampling_factor = nominal_factor + compensation; // compress samples 632 } 633 634 btstack_resample_set_factor(&resample_instance, resampling_factor); 635 #endif 636 // start stream if enough frames buffered 637 if (!audio_stream_started && sbc_frames_in_buffer >= OPTIMAL_FRAMES_MIN){ 638 media_processing_start(); 639 } 640 } 641 642 static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header){ 643 int sbc_header_len = 12; // without crc 644 int pos = *offset; 645 646 if (size - pos < sbc_header_len){ 647 printf("Not enough data to read SBC header, expected %d, received %d\n", sbc_header_len, size-pos); 648 return 0; 649 } 650 651 sbc_header->fragmentation = get_bit16(packet[pos], 7); 652 sbc_header->starting_packet = get_bit16(packet[pos], 6); 653 sbc_header->last_packet = get_bit16(packet[pos], 5); 654 sbc_header->num_frames = packet[pos] & 0x0f; 655 pos++; 656 *offset = pos; 657 return 1; 658 } 659 660 static int read_media_data_header(uint8_t *packet, int size, int *offset, avdtp_media_packet_header_t *media_header){ 661 int media_header_len = 12; // without crc 662 int pos = *offset; 663 664 if (size - pos < media_header_len){ 665 printf("Not enough data to read media packet header, expected %d, received %d\n", media_header_len, size-pos); 666 return 0; 667 } 668 669 media_header->version = packet[pos] & 0x03; 670 media_header->padding = get_bit16(packet[pos],2); 671 media_header->extension = get_bit16(packet[pos],3); 672 media_header->csrc_count = (packet[pos] >> 4) & 0x0F; 673 pos++; 674 675 media_header->marker = get_bit16(packet[pos],0); 676 media_header->payload_type = (packet[pos] >> 1) & 0x7F; 677 pos++; 678 679 media_header->sequence_number = big_endian_read_16(packet, pos); 680 pos+=2; 681 682 media_header->timestamp = big_endian_read_32(packet, pos); 683 pos+=4; 684 685 media_header->synchronization_source = big_endian_read_32(packet, pos); 686 pos+=4; 687 *offset = pos; 688 return 1; 689 } 690 691 static void dump_sbc_configuration(media_codec_configuration_sbc_t * configuration){ 692 printf(" - num_channels: %d\n", configuration->num_channels); 693 printf(" - sampling_frequency: %d\n", configuration->sampling_frequency); 694 printf(" - channel_mode: %d\n", configuration->channel_mode); 695 printf(" - block_length: %d\n", configuration->block_length); 696 printf(" - subbands: %d\n", configuration->subbands); 697 printf(" - allocation_method: %d\n", configuration->allocation_method); 698 printf(" - bitpool_value [%d, %d] \n", configuration->min_bitpool_value, configuration->max_bitpool_value); 699 printf("\n"); 700 } 701 702 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 703 UNUSED(channel); 704 UNUSED(size); 705 uint16_t local_cid; 706 uint8_t status; 707 bd_addr_t address; 708 709 a2dp_sink_demo_avrcp_connection_t * connection = &a2dp_sink_demo_avrcp_connection; 710 711 if (packet_type != HCI_EVENT_PACKET) return; 712 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 713 switch (packet[2]){ 714 case AVRCP_SUBEVENT_CONNECTION_ESTABLISHED: { 715 local_cid = avrcp_subevent_connection_established_get_avrcp_cid(packet); 716 status = avrcp_subevent_connection_established_get_status(packet); 717 if (status != ERROR_CODE_SUCCESS){ 718 printf("AVRCP: Connection failed, status 0x%02x\n", status); 719 connection->avrcp_cid = 0; 720 return; 721 } 722 723 connection->avrcp_cid = local_cid; 724 avrcp_subevent_connection_established_get_bd_addr(packet, address); 725 printf("AVRCP: Connected to %s, cid 0x%02x\n", bd_addr_to_str(address), connection->avrcp_cid); 726 727 avrcp_target_support_event(connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED); 728 avrcp_target_support_event(connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED); 729 avrcp_target_battery_status_changed(connection->avrcp_cid, battery_status); 730 731 // automatically enable notifications 732 avrcp_controller_enable_notification(connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED); 733 avrcp_controller_enable_notification(connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED); 734 avrcp_controller_enable_notification(connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 735 return; 736 } 737 738 case AVRCP_SUBEVENT_CONNECTION_RELEASED: 739 printf("AVRCP: Channel released: cid 0x%02x\n", avrcp_subevent_connection_released_get_avrcp_cid(packet)); 740 connection->avrcp_cid = 0; 741 return; 742 default: 743 break; 744 } 745 } 746 747 static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 748 UNUSED(channel); 749 UNUSED(size); 750 751 // helper to print c strings 752 uint8_t avrcp_subevent_value[256]; 753 uint8_t play_status; 754 755 a2dp_sink_demo_avrcp_connection_t * avrcp_connection = &a2dp_sink_demo_avrcp_connection; 756 757 if (packet_type != HCI_EVENT_PACKET) return; 758 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 759 if (avrcp_connection->avrcp_cid == 0) return; 760 761 memset(avrcp_subevent_value, 0, sizeof(avrcp_subevent_value)); 762 switch (packet[2]){ 763 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED: 764 printf("AVRCP Controller: Playback position changed, position %d ms\n", (unsigned int) avrcp_subevent_notification_playback_pos_changed_get_playback_position_ms(packet)); 765 break; 766 case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_STATUS_CHANGED: 767 printf("AVRCP Controller: Playback status changed %s\n", avrcp_play_status2str(avrcp_subevent_notification_playback_status_changed_get_play_status(packet))); 768 play_status = avrcp_subevent_notification_playback_status_changed_get_play_status(packet); 769 switch (play_status){ 770 case AVRCP_PLAYBACK_STATUS_PLAYING: 771 avrcp_connection->playing = true; 772 break; 773 default: 774 avrcp_connection->playing = false; 775 break; 776 } 777 printf("AVRCP Controller: Playback status changed %s\n", avrcp_play_status2str(play_status)); return; 778 case AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED: 779 printf("AVRCP Controller: Playing content changed\n"); 780 return; 781 case AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED: 782 printf("AVRCP Controller: Track changed\n"); 783 return; 784 case AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED: 785 printf("AVRCP Controller: Changed\n"); 786 return; 787 case AVRCP_SUBEVENT_SHUFFLE_AND_REPEAT_MODE:{ 788 uint8_t shuffle_mode = avrcp_subevent_shuffle_and_repeat_mode_get_shuffle_mode(packet); 789 uint8_t repeat_mode = avrcp_subevent_shuffle_and_repeat_mode_get_repeat_mode(packet); 790 printf("AVRCP Controller: %s, %s\n", avrcp_shuffle2str(shuffle_mode), avrcp_repeat2str(repeat_mode)); 791 break; 792 } 793 case AVRCP_SUBEVENT_NOW_PLAYING_TRACK_INFO: 794 printf("AVRCP Controller: Track: %d\n", avrcp_subevent_now_playing_track_info_get_track(packet)); 795 break; 796 797 case AVRCP_SUBEVENT_NOW_PLAYING_TOTAL_TRACKS_INFO: 798 printf("AVRCP Controller: Total Tracks: %d\n", avrcp_subevent_now_playing_total_tracks_info_get_total_tracks(packet)); 799 break; 800 801 case AVRCP_SUBEVENT_NOW_PLAYING_TITLE_INFO: 802 if (avrcp_subevent_now_playing_title_info_get_value_len(packet) > 0){ 803 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_title_info_get_value(packet), avrcp_subevent_now_playing_title_info_get_value_len(packet)); 804 printf("AVRCP Controller: Title: %s\n", avrcp_subevent_value); 805 } 806 break; 807 808 case AVRCP_SUBEVENT_NOW_PLAYING_ARTIST_INFO: 809 if (avrcp_subevent_now_playing_artist_info_get_value_len(packet) > 0){ 810 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_artist_info_get_value(packet), avrcp_subevent_now_playing_artist_info_get_value_len(packet)); 811 printf("AVRCP Controller: Artist: %s\n", avrcp_subevent_value); 812 } 813 break; 814 815 case AVRCP_SUBEVENT_NOW_PLAYING_ALBUM_INFO: 816 if (avrcp_subevent_now_playing_album_info_get_value_len(packet) > 0){ 817 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_album_info_get_value(packet), avrcp_subevent_now_playing_album_info_get_value_len(packet)); 818 printf("AVRCP Controller: Album: %s\n", avrcp_subevent_value); 819 } 820 break; 821 822 case AVRCP_SUBEVENT_NOW_PLAYING_GENRE_INFO: 823 if (avrcp_subevent_now_playing_genre_info_get_value_len(packet) > 0){ 824 memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_genre_info_get_value(packet), avrcp_subevent_now_playing_genre_info_get_value_len(packet)); 825 printf("AVRCP Controller: Genre: %s\n", avrcp_subevent_value); 826 } 827 break; 828 829 case AVRCP_SUBEVENT_PLAY_STATUS: 830 printf("AVRCP Controller: Song length %"PRIu32" ms, Song position %"PRIu32" ms, Play status %s\n", 831 avrcp_subevent_play_status_get_song_length(packet), 832 avrcp_subevent_play_status_get_song_position(packet), 833 avrcp_play_status2str(avrcp_subevent_play_status_get_play_status(packet))); 834 break; 835 836 case AVRCP_SUBEVENT_OPERATION_COMPLETE: 837 printf("AVRCP Controller: %s complete\n", avrcp_operation2str(avrcp_subevent_operation_complete_get_operation_id(packet))); 838 break; 839 840 case AVRCP_SUBEVENT_OPERATION_START: 841 printf("AVRCP Controller: %s start\n", avrcp_operation2str(avrcp_subevent_operation_start_get_operation_id(packet))); 842 break; 843 844 case AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_END: 845 printf("AVRCP Controller: Track reached end\n"); 846 break; 847 848 case AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE: 849 printf("AVRCP Controller: Set Player App Value %s\n", avrcp_ctype2str(avrcp_subevent_player_application_value_response_get_command_type(packet))); 850 break; 851 852 default: 853 break; 854 } 855 } 856 857 static void avrcp_volume_changed(uint8_t volume){ 858 const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); 859 if (audio){ 860 audio->set_volume(volume); 861 } 862 } 863 864 static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 865 UNUSED(channel); 866 UNUSED(size); 867 868 if (packet_type != HCI_EVENT_PACKET) return; 869 if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; 870 871 uint8_t volume; 872 char const * button_state; 873 avrcp_operation_id_t operation_id; 874 875 switch (packet[2]){ 876 case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED: 877 volume = avrcp_subevent_notification_volume_changed_get_absolute_volume(packet); 878 volume_percentage = volume * 100 / 127; 879 printf("AVRCP Target : Volume set to %d%% (%d)\n", volume_percentage, volume); 880 avrcp_volume_changed(volume); 881 break; 882 883 case AVRCP_SUBEVENT_OPERATION: 884 operation_id = avrcp_subevent_operation_get_operation_id(packet); 885 button_state = avrcp_subevent_operation_get_button_pressed(packet) > 0 ? "PRESS" : "RELEASE"; 886 switch (operation_id){ 887 case AVRCP_OPERATION_ID_VOLUME_UP: 888 printf("AVRCP Target : VOLUME UP (%s)\n", button_state); 889 break; 890 case AVRCP_OPERATION_ID_VOLUME_DOWN: 891 printf("AVRCP Target : VOLUME DOWN (%s)\n", button_state); 892 break; 893 default: 894 return; 895 } 896 break; 897 default: 898 printf("AVRCP Target : Event 0x%02x is not parsed\n", packet[2]); 899 break; 900 } 901 } 902 903 static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 904 UNUSED(channel); 905 UNUSED(size); 906 if (packet_type != HCI_EVENT_PACKET) return; 907 if (hci_event_packet_get_type(packet) == HCI_EVENT_PIN_CODE_REQUEST) { 908 bd_addr_t address; 909 printf("Pin code request - using '0000'\n"); 910 hci_event_pin_code_request_get_bd_addr(packet, address); 911 gap_pin_code_response(address, "0000"); 912 } 913 } 914 915 static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 916 UNUSED(channel); 917 UNUSED(size); 918 bd_addr_t address; 919 uint8_t status; 920 921 uint8_t allocation_method; 922 923 if (packet_type != HCI_EVENT_PACKET) return; 924 if (hci_event_packet_get_type(packet) != HCI_EVENT_A2DP_META) return; 925 926 a2dp_sink_demo_a2dp_connection_t * a2dp_conn = &a2dp_sink_demo_a2dp_connection; 927 928 switch (packet[2]){ 929 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: 930 printf("A2DP Sink : Received non SBC codec - not implemented\n"); 931 break; 932 case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ 933 printf("A2DP Sink : Received SBC codec configuration\n"); 934 a2dp_conn->sbc_configuration.reconfigure = a2dp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); 935 a2dp_conn->sbc_configuration.num_channels = a2dp_subevent_signaling_media_codec_sbc_configuration_get_num_channels(packet); 936 a2dp_conn->sbc_configuration.sampling_frequency = a2dp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); 937 a2dp_conn->sbc_configuration.block_length = a2dp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); 938 a2dp_conn->sbc_configuration.subbands = a2dp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); 939 a2dp_conn->sbc_configuration.min_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); 940 a2dp_conn->sbc_configuration.max_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); 941 942 allocation_method = a2dp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); 943 944 // Adapt Bluetooth spec definition to SBC Encoder expected input 945 a2dp_conn->sbc_configuration.allocation_method = (btstack_sbc_allocation_method_t)(allocation_method - 1); 946 947 switch (a2dp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet)){ 948 case AVDTP_CHANNEL_MODE_JOINT_STEREO: 949 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO; 950 break; 951 case AVDTP_CHANNEL_MODE_STEREO: 952 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_STEREO; 953 break; 954 case AVDTP_CHANNEL_MODE_DUAL_CHANNEL: 955 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_DUAL_CHANNEL; 956 break; 957 case AVDTP_CHANNEL_MODE_MONO: 958 a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_MONO; 959 break; 960 default: 961 btstack_assert(false); 962 break; 963 } 964 dump_sbc_configuration(&a2dp_conn->sbc_configuration); 965 break; 966 } 967 968 case A2DP_SUBEVENT_STREAM_ESTABLISHED: 969 a2dp_subevent_stream_established_get_bd_addr(packet, a2dp_conn->addr); 970 971 status = a2dp_subevent_stream_established_get_status(packet); 972 if (status != ERROR_CODE_SUCCESS){ 973 printf("A2DP Sink : Streaming connection failed, status 0x%02x\n", status); 974 break; 975 } 976 977 a2dp_conn->a2dp_cid = a2dp_subevent_stream_established_get_a2dp_cid(packet); 978 a2dp_conn->stream_state = STREAM_STATE_OPEN; 979 980 printf("A2DP Sink : Streaming connection is established, address %s, cid 0x%02x, local seid %d\n", 981 bd_addr_to_str(address), a2dp_conn->a2dp_cid, a2dp_conn->a2dp_local_seid); 982 #ifdef HAVE_BTSTACK_STDIN 983 // use address for outgoing connections 984 memcpy(device_addr, address, 6); 985 #endif 986 break; 987 988 #ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION 989 case A2DP_SUBEVENT_START_STREAM_REQUESTED: 990 printf("A2DP Sink : Explicit Accept to start stream, local_seid %d\n", a2dp_subevent_start_stream_requested_get_local_seid(packet)); 991 a2dp_sink_start_stream_accept(a2dp_cid, a2dp_local_seid); 992 break; 993 #endif 994 case A2DP_SUBEVENT_STREAM_STARTED: 995 printf("A2DP Sink : Stream started\n"); 996 a2dp_conn->stream_state = STREAM_STATE_PLAYING; 997 if (a2dp_conn->sbc_configuration.reconfigure){ 998 media_processing_close(); 999 } 1000 // prepare media processing 1001 media_processing_init(&a2dp_conn->sbc_configuration); 1002 // audio stream is started when buffer reaches minimal level 1003 break; 1004 1005 case A2DP_SUBEVENT_STREAM_SUSPENDED: 1006 printf("A2DP Sink : Stream paused\n"); 1007 a2dp_conn->stream_state = STREAM_STATE_PAUSED; 1008 media_processing_pause(); 1009 break; 1010 1011 case A2DP_SUBEVENT_STREAM_RELEASED: 1012 printf("A2DP Sink : Stream released\n"); 1013 a2dp_conn->stream_state = STREAM_STATE_CLOSED; 1014 media_processing_close(); 1015 break; 1016 1017 case A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: 1018 printf("A2DP Sink : Signaling connection released\n"); 1019 a2dp_conn->a2dp_cid = 0; 1020 media_processing_close(); 1021 break; 1022 1023 default: 1024 break; 1025 } 1026 } 1027 1028 #ifdef HAVE_BTSTACK_STDIN 1029 static void show_usage(void){ 1030 bd_addr_t iut_address; 1031 gap_local_bd_addr(iut_address); 1032 printf("\n--- Bluetooth AVDTP Sink/AVRCP Connection Test Console %s ---\n", bd_addr_to_str(iut_address)); 1033 printf("b - AVDTP Sink create connection to addr %s\n", bd_addr_to_str(device_addr)); 1034 printf("B - AVDTP Sink disconnect\n"); 1035 printf("c - AVRCP create connection to addr %s\n", bd_addr_to_str(device_addr)); 1036 printf("C - AVRCP disconnect\n"); 1037 1038 printf("w - delay report\n"); 1039 1040 printf("\n--- Bluetooth AVRCP Commands %s ---\n", bd_addr_to_str(iut_address)); 1041 printf("O - get play status\n"); 1042 printf("j - get now playing info\n"); 1043 printf("k - play\n"); 1044 printf("K - stop\n"); 1045 printf("L - pause\n"); 1046 printf("u - start fast forward\n"); 1047 printf("U - stop fast forward\n"); 1048 printf("n - start rewind\n"); 1049 printf("N - stop rewind\n"); 1050 printf("i - forward\n"); 1051 printf("I - backward\n"); 1052 printf("M - mute\n"); 1053 printf("r - skip\n"); 1054 printf("q - query repeat and shuffle mode\n"); 1055 printf("v - repeat single track\n"); 1056 printf("x - repeat all tracks\n"); 1057 printf("X - disable repeat mode\n"); 1058 printf("z - shuffle all tracks\n"); 1059 printf("Z - disable shuffle mode\n"); 1060 1061 printf("a/A - register/deregister TRACK_CHANGED\n"); 1062 printf("R/P - register/deregister PLAYBACK_POS_CHANGED\n"); 1063 1064 printf("s/S - send/release long button press REWIND\n"); 1065 1066 printf("\n--- Volume and Battery Control ---\n"); 1067 printf("t - volume up for 10 percent\n"); 1068 printf("T - volume down for 10 percent\n"); 1069 printf("V - toggle Battery status from AVRCP_BATTERY_STATUS_NORMAL to AVRCP_BATTERY_STATUS_FULL_CHARGE\n"); 1070 printf("---\n"); 1071 } 1072 #endif 1073 1074 #ifdef HAVE_BTSTACK_STDIN 1075 static void stdin_process(char cmd){ 1076 uint8_t status = ERROR_CODE_SUCCESS; 1077 uint8_t volume; 1078 avrcp_battery_status_t old_battery_status; 1079 1080 a2dp_sink_demo_stream_endpoint_t * stream_endpoint = &a2dp_sink_demo_stream_endpoint; 1081 a2dp_sink_demo_a2dp_connection_t * a2dp_connection = &a2dp_sink_demo_a2dp_connection; 1082 a2dp_sink_demo_avrcp_connection_t * avrcp_connection = &a2dp_sink_demo_avrcp_connection; 1083 1084 switch (cmd){ 1085 case 'b': 1086 status = a2dp_sink_establish_stream(device_addr, stream_endpoint->a2dp_local_seid, &a2dp_connection->a2dp_cid); 1087 printf(" - Create AVDTP connection to addr %s, and local seid %d, cid 0x%02x.\n", 1088 bd_addr_to_str(device_addr), a2dp_connection->a2dp_local_seid, a2dp_connection->a2dp_cid); 1089 break; 1090 case 'B': 1091 printf(" - AVDTP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 1092 a2dp_sink_disconnect(a2dp_connection->a2dp_cid); 1093 break; 1094 case 'c': 1095 printf(" - Create AVRCP connection to addr %s.\n", bd_addr_to_str(device_addr)); 1096 status = avrcp_connect(device_addr, &avrcp_connection->avrcp_cid); 1097 break; 1098 case 'C': 1099 printf(" - AVRCP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); 1100 status = avrcp_disconnect(avrcp_connection->avrcp_cid); 1101 break; 1102 1103 case '\n': 1104 case '\r': 1105 break; 1106 case 'w': 1107 printf("Send delay report\n"); 1108 avdtp_sink_delay_report(a2dp_connection->a2dp_cid, a2dp_connection->a2dp_local_seid, 100); 1109 break; 1110 // Volume Control 1111 case 't': 1112 volume_percentage = volume_percentage <= 90 ? volume_percentage + 10 : 100; 1113 volume = volume_percentage * 127 / 100; 1114 printf(" - volume up for 10 percent, %d%% (%d) \n", volume_percentage, volume); 1115 status = avrcp_target_volume_changed(avrcp_connection->avrcp_cid, volume); 1116 avrcp_volume_changed(volume); 1117 break; 1118 case 'T': 1119 volume_percentage = volume_percentage >= 10 ? volume_percentage - 10 : 0; 1120 volume = volume_percentage * 127 / 100; 1121 printf(" - volume down for 10 percent, %d%% (%d) \n", volume_percentage, volume); 1122 status = avrcp_target_volume_changed(avrcp_connection->avrcp_cid, volume); 1123 avrcp_volume_changed(volume); 1124 break; 1125 case 'V': 1126 old_battery_status = battery_status; 1127 1128 if (battery_status < AVRCP_BATTERY_STATUS_FULL_CHARGE){ 1129 battery_status = (avrcp_battery_status_t)((uint8_t) battery_status + 1); 1130 } else { 1131 battery_status = AVRCP_BATTERY_STATUS_NORMAL; 1132 } 1133 printf(" - toggle battery value, old %d, new %d\n", old_battery_status, battery_status); 1134 status = avrcp_target_battery_status_changed(avrcp_connection->avrcp_cid, battery_status); 1135 break; 1136 case 'O': 1137 printf(" - get play status\n"); 1138 status = avrcp_controller_get_play_status(avrcp_connection->avrcp_cid); 1139 break; 1140 case 'j': 1141 printf(" - get now playing info\n"); 1142 status = avrcp_controller_get_now_playing_info(avrcp_connection->avrcp_cid); 1143 break; 1144 case 'k': 1145 printf(" - play\n"); 1146 status = avrcp_controller_play(avrcp_connection->avrcp_cid); 1147 break; 1148 case 'K': 1149 printf(" - stop\n"); 1150 status = avrcp_controller_stop(avrcp_connection->avrcp_cid); 1151 break; 1152 case 'L': 1153 printf(" - pause\n"); 1154 status = avrcp_controller_pause(avrcp_connection->avrcp_cid); 1155 break; 1156 case 'u': 1157 printf(" - start fast forward\n"); 1158 status = avrcp_controller_press_and_hold_fast_forward(avrcp_connection->avrcp_cid); 1159 break; 1160 case 'U': 1161 printf(" - stop fast forward\n"); 1162 status = avrcp_controller_release_press_and_hold_cmd(avrcp_connection->avrcp_cid); 1163 break; 1164 case 'n': 1165 printf(" - start rewind\n"); 1166 status = avrcp_controller_press_and_hold_rewind(avrcp_connection->avrcp_cid); 1167 break; 1168 case 'N': 1169 printf(" - stop rewind\n"); 1170 status = avrcp_controller_release_press_and_hold_cmd(avrcp_connection->avrcp_cid); 1171 break; 1172 case 'i': 1173 printf(" - forward\n"); 1174 status = avrcp_controller_forward(avrcp_connection->avrcp_cid); 1175 break; 1176 case 'I': 1177 printf(" - backward\n"); 1178 status = avrcp_controller_backward(avrcp_connection->avrcp_cid); 1179 break; 1180 case 'M': 1181 printf(" - mute\n"); 1182 status = avrcp_controller_mute(avrcp_connection->avrcp_cid); 1183 break; 1184 case 'r': 1185 printf(" - skip\n"); 1186 status = avrcp_controller_skip(avrcp_connection->avrcp_cid); 1187 break; 1188 case 'q': 1189 printf(" - query repeat and shuffle mode\n"); 1190 status = avrcp_controller_query_shuffle_and_repeat_modes(avrcp_connection->avrcp_cid); 1191 break; 1192 case 'v': 1193 printf(" - repeat single track\n"); 1194 status = avrcp_controller_set_repeat_mode(avrcp_connection->avrcp_cid, AVRCP_REPEAT_MODE_SINGLE_TRACK); 1195 break; 1196 case 'x': 1197 printf(" - repeat all tracks\n"); 1198 status = avrcp_controller_set_repeat_mode(avrcp_connection->avrcp_cid, AVRCP_REPEAT_MODE_ALL_TRACKS); 1199 break; 1200 case 'X': 1201 printf(" - disable repeat mode\n"); 1202 status = avrcp_controller_set_repeat_mode(avrcp_connection->avrcp_cid, AVRCP_REPEAT_MODE_OFF); 1203 break; 1204 case 'z': 1205 printf(" - shuffle all tracks\n"); 1206 status = avrcp_controller_set_shuffle_mode(avrcp_connection->avrcp_cid, AVRCP_SHUFFLE_MODE_ALL_TRACKS); 1207 break; 1208 case 'Z': 1209 printf(" - disable shuffle mode\n"); 1210 status = avrcp_controller_set_shuffle_mode(avrcp_connection->avrcp_cid, AVRCP_SHUFFLE_MODE_OFF); 1211 break; 1212 case 'a': 1213 printf("AVRCP: enable notification TRACK_CHANGED\n"); 1214 avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1215 break; 1216 case 'A': 1217 printf("AVRCP: disable notification TRACK_CHANGED\n"); 1218 avrcp_controller_disable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); 1219 break; 1220 case 'R': 1221 printf("AVRCP: enable notification PLAYBACK_POS_CHANGED\n"); 1222 avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 1223 break; 1224 case 'P': 1225 printf("AVRCP: disable notification PLAYBACK_POS_CHANGED\n"); 1226 avrcp_controller_disable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); 1227 break; 1228 case 's': 1229 printf("AVRCP: send long button press REWIND\n"); 1230 avrcp_controller_start_press_and_hold_cmd(avrcp_connection->avrcp_cid, AVRCP_OPERATION_ID_REWIND); 1231 break; 1232 case 'S': 1233 printf("AVRCP: release long button press REWIND\n"); 1234 avrcp_controller_release_press_and_hold_cmd(avrcp_connection->avrcp_cid); 1235 break; 1236 default: 1237 show_usage(); 1238 return; 1239 } 1240 if (status != ERROR_CODE_SUCCESS){ 1241 printf("Could not perform command, status 0x%02x\n", status); 1242 } 1243 } 1244 #endif 1245 1246 int btstack_main(int argc, const char * argv[]); 1247 int btstack_main(int argc, const char * argv[]){ 1248 UNUSED(argc); 1249 (void)argv; 1250 1251 a2dp_and_avrcp_setup(); 1252 1253 #ifdef HAVE_BTSTACK_STDIN 1254 // parse human-readable Bluetooth address 1255 sscanf_bd_addr(device_addr_string, device_addr); 1256 btstack_stdin_setup(stdin_process); 1257 #endif 1258 1259 // turn on! 1260 printf("Starting BTstack ...\n"); 1261 hci_power_control(HCI_POWER_ON); 1262 return 0; 1263 } 1264 /* EXAMPLE_END */ 1265