/* * Copyright (C) 2016 BlueKitchen GmbH * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the copyright holders nor the names of * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * 4. Any redistribution, use, or modification is done solely for * personal benefit and not for any commercial purpose or for * monetary gain. * * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * Please inquire about commercial licensing options at * contact@bluekitchen-gmbh.com * */ #define BTSTACK_FILE__ "a2dp_sink_demo.c" /* * a2dp_sink_demo.c */ // ***************************************************************************** /* EXAMPLE_START(a2dp_sink_demo): A2DP Sink - Receive Audio Stream and Control Playback * * @text This A2DP Sink example demonstrates how to use the A2DP Sink service to * receive an audio data stream from a remote A2DP Source device. In addition, * the AVRCP Controller is used to get information on currently played media, * such are title, artist and album, as well as to control the playback, * i.e. to play, stop, repeat, etc. If HAVE_BTSTACK_STDIN is set, press SPACE on * the console to show the available AVDTP and AVRCP commands. * * @text To test with a remote device, e.g. a mobile phone, * pair from the remote device with the demo, then start playing music on the remote device. * Alternatively, set the device_addr_string to the Bluetooth address of your * remote device in the code, and call connect from the UI. * * @text For more info on BTstack audio, see our blog post * [A2DP Sink and Source on STM32 F4 Discovery Board](http://bluekitchen-gmbh.com/a2dp-sink-and-source-on-stm32-f4-discovery-board/). * */ // ***************************************************************************** #include #include #include #include #include #include "btstack.h" #include "btstack_resample.h" //#define AVRCP_BROWSING_ENABLED // if volume control not supported by btstack_audio_sink, you can try to disable volume change notification // to force the A2DP Source to reduce volume by attenuating the audio stream #define SUPPORT_VOLUME_CHANGE_NOTIFICATION #ifdef HAVE_BTSTACK_STDIN #include "btstack_stdin.h" #endif #include "btstack_ring_buffer.h" #ifdef HAVE_POSIX_FILE_IO #include "wav_util.h" #define STORE_TO_SBC_FILE #define STORE_TO_WAV_FILE #endif #define NUM_CHANNELS 2 #define BYTES_PER_FRAME (2*NUM_CHANNELS) #define MAX_SBC_FRAME_SIZE 120 // SBC Decoder for WAV file or live playback static btstack_sbc_decoder_state_t state; static btstack_sbc_mode_t mode = SBC_MODE_STANDARD; // ring buffer for SBC Frames // below 30: add samples, 30-40: fine, above 40: drop samples #define OPTIMAL_FRAMES_MIN 30 #define OPTIMAL_FRAMES_MAX 40 #define ADDITIONAL_FRAMES 20 static uint8_t sbc_frame_storage[(OPTIMAL_FRAMES_MAX + ADDITIONAL_FRAMES) * MAX_SBC_FRAME_SIZE]; static btstack_ring_buffer_t sbc_frame_ring_buffer; static unsigned int sbc_frame_size; // rest buffer for not fully used sbc frames, with additional frames for resampling static uint8_t decoded_audio_storage[(128+16) * BYTES_PER_FRAME]; static btstack_ring_buffer_t decoded_audio_ring_buffer; static int audio_stream_started; // temp storage of lower-layer request static int16_t * request_buffer; static int request_frames; #define STORE_FROM_PLAYBACK // WAV File #ifdef STORE_TO_WAV_FILE static uint32_t audio_frame_count = 0; static char * wav_filename = "av2dp_sink_demo.wav"; #endif #ifdef STORE_TO_SBC_FILE static FILE * sbc_file; static char * sbc_filename = "av2dp_sink_demo.sbc"; #endif typedef struct { int reconfigure; int num_channels; int sampling_frequency; int block_length; int subbands; int min_bitpool_value; int max_bitpool_value; btstack_sbc_channel_mode_t channel_mode; btstack_sbc_allocation_method_t allocation_method; } media_codec_configuration_sbc_t; static media_codec_configuration_sbc_t sbc_configuration; static int volume_percentage = 0; #ifdef SUPPORT_VOLUME_CHANGE_NOTIFICATION static uint8_t events_num = 3; static uint8_t events[] = { AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED }; #endif static uint8_t companies_num = 1; static uint8_t companies[] = { 0x00, 0x19, 0x58 //BT SIG registered CompanyID }; #ifdef HAVE_BTSTACK_STDIN // pts: static const char * device_addr_string = "6C:72:E7:10:22:EE"; // mac 2013: static const char * device_addr_string = "84:38:35:65:d1:15"; // iPhone 5S: static const char * device_addr_string = "54:E4:3A:26:A2:39"; static bd_addr_t device_addr; #endif static btstack_packet_callback_registration_t hci_event_callback_registration; static uint8_t sdp_avdtp_sink_service_buffer[150]; static uint8_t sdp_avrcp_target_service_buffer[150]; static uint8_t sdp_avrcp_controller_service_buffer[200]; static uint8_t device_id_sdp_service_buffer[100]; static uint16_t a2dp_cid = 0; static uint8_t a2dp_local_seid = 0; static uint16_t avrcp_cid = 0; static uint8_t avrcp_connected = 0; static uint8_t avrcp_subevent_value[100]; static uint8_t media_sbc_codec_capabilities[] = { 0xFF,//(AVDTP_SBC_44100 << 4) | AVDTP_SBC_STEREO, 0xFF,//(AVDTP_SBC_BLOCK_LENGTH_16 << 4) | (AVDTP_SBC_SUBBANDS_8 << 2) | AVDTP_SBC_ALLOCATION_METHOD_LOUDNESS, 2, 53 }; static uint8_t media_sbc_codec_configuration[4]; static int media_initialized = 0; static btstack_resample_t resample_instance; /* @section Main Application Setup * * @text The Listing MainConfiguration shows how to setup AD2P Sink and AVRCP services. * Besides calling init() method for each service, you'll also need to register several packet handlers: * - hci_packet_handler - handles legacy pairing, here by using fixed '0000' pin code. * - 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). * - 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. * - avrcp_packet_handler - receives connect/disconnect event. * - avrcp_controller_packet_handler - receives answers for sent AVRCP commands. * - avrcp_target_packet_handler - receives AVRCP commands, and registered notifications. * - 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. * * @text To announce A2DP Sink and AVRCP services, you need to create corresponding * SDP records and register them with the SDP service. * * @text Note, currently only the SBC codec is supported. * If you want to store the audio data in a file, you'll need to define STORE_TO_WAV_FILE. * 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. * The initialization of the SBC decoder requires a callback that handles PCM data: * - handle_pcm_data - handles PCM audio frames. Here, they are stored a in wav file if STORE_TO_WAV_FILE is defined, and/or played using the audio library. */ /* LISTING_START(MainConfiguration): Setup Audio Sink and AVRCP services */ static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size); static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size); static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); #ifdef HAVE_BTSTACK_STDIN static void stdin_process(char cmd); #endif static int a2dp_and_avrcp_setup(void){ l2cap_init(); // Initialize AVDTP Sink a2dp_sink_init(); a2dp_sink_register_packet_handler(&a2dp_sink_packet_handler); a2dp_sink_register_media_handler(&handle_l2cap_media_data_packet); // Create stream endpoint avdtp_stream_endpoint_t * local_stream_endpoint = 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)); if (!local_stream_endpoint){ printf("A2DP Sink: not enough memory to create local stream endpoint\n"); return 1; } // Store stream enpoint's SEP ID, as it is used by A2DP API to indentify the stream endpoint a2dp_local_seid = avdtp_local_seid(local_stream_endpoint); // Initialize AVRCP service avrcp_init(); avrcp_register_packet_handler(&avrcp_packet_handler); // Initialize AVRCP Controller avrcp_controller_init(); avrcp_controller_register_packet_handler(&avrcp_controller_packet_handler); // Initialize AVRCP Target avrcp_target_init(); avrcp_target_register_packet_handler(&avrcp_target_packet_handler); // Initialize SDP sdp_init(); // Create A2DP Sink service record and register it with SDP memset(sdp_avdtp_sink_service_buffer, 0, sizeof(sdp_avdtp_sink_service_buffer)); a2dp_sink_create_sdp_record(sdp_avdtp_sink_service_buffer, 0x10001, AVDTP_SINK_FEATURE_MASK_HEADPHONE, NULL, NULL); sdp_register_service(sdp_avdtp_sink_service_buffer); // Create AVRCP Controller service record and register it with SDP. We send Category 1 commands to the media player, e.g. play/pause memset(sdp_avrcp_controller_service_buffer, 0, sizeof(sdp_avrcp_controller_service_buffer)); uint16_t controller_supported_features = AVRCP_FEATURE_MASK_CATEGORY_PLAYER_OR_RECORDER; #ifdef AVRCP_BROWSING_ENABLED controller_supported_features |= AVRCP_FEATURE_MASK_BROWSING; #endif avrcp_controller_create_sdp_record(sdp_avrcp_controller_service_buffer, 0x10002, controller_supported_features, NULL, NULL); sdp_register_service(sdp_avrcp_controller_service_buffer); // Create AVRCP Target service record and register it with SDP. We receive Category 2 commands from the media player, e.g. volume up/down memset(sdp_avrcp_target_service_buffer, 0, sizeof(sdp_avrcp_target_service_buffer)); uint16_t target_supported_features = AVRCP_FEATURE_MASK_CATEGORY_MONITOR_OR_AMPLIFIER; avrcp_target_create_sdp_record(sdp_avrcp_target_service_buffer, 0x10003, target_supported_features, NULL, NULL); sdp_register_service(sdp_avrcp_target_service_buffer); // Create Device ID (PnP) service record and register it with SDP memset(device_id_sdp_service_buffer, 0, sizeof(device_id_sdp_service_buffer)); device_id_create_sdp_record(device_id_sdp_service_buffer, 0x10004, DEVICE_ID_VENDOR_ID_SOURCE_BLUETOOTH, BLUETOOTH_COMPANY_ID_BLUEKITCHEN_GMBH, 1, 1); sdp_register_service(device_id_sdp_service_buffer); // Set local name with a template Bluetooth address, that will be automatically // replaced with a actual address once it is available, i.e. when BTstack boots // up and starts talking to a Bluetooth module. gap_set_local_name("A2DP Sink Demo 00:00:00:00:00:00"); gap_discoverable_control(1); gap_set_class_of_device(0x200408); // Register for HCI events hci_event_callback_registration.callback = &hci_packet_handler; hci_add_event_handler(&hci_event_callback_registration); #ifdef HAVE_POSIX_FILE_IO if (!btstack_audio_sink_get_instance()){ printf("No audio playback.\n"); } else { printf("Audio playback supported.\n"); } #ifdef STORE_TO_WAV_FILE printf("Audio will be stored to \'%s\' file.\n", wav_filename); #endif #endif return 0; } /* LISTING_END */ static void playback_handler(int16_t * buffer, uint16_t num_audio_frames){ #ifdef STORE_TO_WAV_FILE int wav_samples = num_audio_frames * NUM_CHANNELS; int16_t * wav_buffer = buffer; #endif // called from lower-layer but guaranteed to be on main thread if (sbc_frame_size == 0){ memset(buffer, 0, num_audio_frames * BYTES_PER_FRAME); return; } // first fill from resampled audio uint32_t bytes_read; btstack_ring_buffer_read(&decoded_audio_ring_buffer, (uint8_t *) buffer, num_audio_frames * BYTES_PER_FRAME, &bytes_read); buffer += bytes_read / NUM_CHANNELS; num_audio_frames -= bytes_read / BYTES_PER_FRAME; // then start decoding sbc frames using request_* globals request_buffer = buffer; request_frames = num_audio_frames; while (request_frames && btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) >= sbc_frame_size){ // decode frame uint8_t sbc_frame[MAX_SBC_FRAME_SIZE]; btstack_ring_buffer_read(&sbc_frame_ring_buffer, sbc_frame, sbc_frame_size, &bytes_read); btstack_sbc_decoder_process_data(&state, 0, sbc_frame, sbc_frame_size); } #ifdef STORE_TO_WAV_FILE audio_frame_count += num_audio_frames; wav_writer_write_int16(wav_samples, wav_buffer); #endif } static void handle_pcm_data(int16_t * data, int num_audio_frames, int num_channels, int sample_rate, void * context){ UNUSED(sample_rate); UNUSED(context); UNUSED(num_channels); // must be stereo == 2 const btstack_audio_sink_t * audio_sink = btstack_audio_sink_get_instance(); if (!audio_sink){ #ifdef STORE_TO_WAV_FILE audio_frame_count += num_audio_frames; wav_writer_write_int16(num_audio_frames * NUM_CHANNELS, data); #endif return; } // resample into request buffer - add some additional space for resampling int16_t output_buffer[(128+16) * NUM_CHANNELS]; // 16 * 8 * 2 uint32_t resampled_frames = btstack_resample_block(&resample_instance, data, num_audio_frames, output_buffer); // store data in btstack_audio buffer first int frames_to_copy = btstack_min(resampled_frames, request_frames); memcpy(request_buffer, output_buffer, frames_to_copy * BYTES_PER_FRAME); request_frames -= frames_to_copy; request_buffer += frames_to_copy * NUM_CHANNELS; // and rest in ring buffer int frames_to_store = resampled_frames - frames_to_copy; if (frames_to_store){ 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); if (status){ printf("Error storing samples in PCM ring buffer!!!\n"); } } } static int media_processing_init(media_codec_configuration_sbc_t configuration){ if (media_initialized) return 0; btstack_sbc_decoder_init(&state, mode, handle_pcm_data, NULL); #ifdef STORE_TO_WAV_FILE wav_writer_open(wav_filename, configuration.num_channels, configuration.sampling_frequency); #endif #ifdef STORE_TO_SBC_FILE sbc_file = fopen(sbc_filename, "wb"); #endif btstack_ring_buffer_init(&sbc_frame_ring_buffer, sbc_frame_storage, sizeof(sbc_frame_storage)); btstack_ring_buffer_init(&decoded_audio_ring_buffer, decoded_audio_storage, sizeof(decoded_audio_storage)); btstack_resample_init(&resample_instance, configuration.num_channels); // setup audio playback const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); if (audio){ audio->init(NUM_CHANNELS, configuration.sampling_frequency, &playback_handler); } audio_stream_started = 0; media_initialized = 1; return 0; } static void media_processing_start(void){ if (!media_initialized) return; // setup audio playback const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); if (audio){ audio->start_stream(); } audio_stream_started = 1; } static void media_processing_pause(void){ if (!media_initialized) return; // stop audio playback audio_stream_started = 0; const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); if (audio){ audio->stop_stream(); } } static void media_processing_close(void){ if (!media_initialized) return; media_initialized = 0; audio_stream_started = 0; sbc_frame_size = 0; #ifdef STORE_TO_WAV_FILE wav_writer_close(); uint32_t total_frames_nr = state.good_frames_nr + state.bad_frames_nr + state.zero_frames_nr; 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); printf("WAV Writer: Wrote %u audio frames to wav file: %s\n", audio_frame_count, wav_filename); #endif #ifdef STORE_TO_SBC_FILE fclose(sbc_file); #endif // stop audio playback const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); if (audio){ printf("close stream\n"); audio->close(); } } /* @section Handle Media Data Packet * * @text Here the audio data, are received through the handle_l2cap_media_data_packet callback. * Currently, only the SBC media codec is supported. Hence, the media data consists of the media packet header and the SBC packet. * 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). * If the audio stream wasn't started already and there are enough SBC frames in the ring buffer, start playback. */ static int read_media_data_header(uint8_t * packet, int size, int * offset, avdtp_media_packet_header_t * media_header); static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header); static void handle_l2cap_media_data_packet(uint8_t seid, uint8_t *packet, uint16_t size){ UNUSED(seid); int pos = 0; avdtp_media_packet_header_t media_header; if (!read_media_data_header(packet, size, &pos, &media_header)) return; avdtp_sbc_codec_header_t sbc_header; if (!read_sbc_header(packet, size, &pos, &sbc_header)) return; #ifdef STORE_TO_SBC_FILE fwrite(packet+pos, size-pos, 1, sbc_file); #endif const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); // process data right away if there's no audio implementation active, e.g. on posix systems to store as .wav if (!audio){ btstack_sbc_decoder_process_data(&state, 0, packet+pos, size-pos); return; } // store sbc frame size for buffer management sbc_frame_size = (size-pos)/ sbc_header.num_frames; int status = btstack_ring_buffer_write(&sbc_frame_ring_buffer, packet+pos, size-pos); if (status != ERROR_CODE_SUCCESS){ printf("Error storing samples in SBC ring buffer!!!\n"); } // decide on audio sync drift based on number of sbc frames in queue int sbc_frames_in_buffer = btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer) / sbc_frame_size; uint32_t resampling_factor; // nomimal factor (fixed-point 2^16) and compensation offset uint32_t nomimal_factor = 0x10000; uint32_t compensation = 0x00100; if (sbc_frames_in_buffer < OPTIMAL_FRAMES_MIN){ resampling_factor = nomimal_factor - compensation; // stretch samples } else if (sbc_frames_in_buffer <= OPTIMAL_FRAMES_MAX){ resampling_factor = nomimal_factor; // nothing to do } else { resampling_factor = nomimal_factor + compensation; // compress samples } btstack_resample_set_factor(&resample_instance, resampling_factor); // start stream if enough frames buffered if (!audio_stream_started && sbc_frames_in_buffer >= OPTIMAL_FRAMES_MIN){ media_processing_start(); } } static int read_sbc_header(uint8_t * packet, int size, int * offset, avdtp_sbc_codec_header_t * sbc_header){ int sbc_header_len = 12; // without crc int pos = *offset; if (size - pos < sbc_header_len){ printf("Not enough data to read SBC header, expected %d, received %d\n", sbc_header_len, size-pos); return 0; } sbc_header->fragmentation = get_bit16(packet[pos], 7); sbc_header->starting_packet = get_bit16(packet[pos], 6); sbc_header->last_packet = get_bit16(packet[pos], 5); sbc_header->num_frames = packet[pos] & 0x0f; pos++; *offset = pos; return 1; } static int read_media_data_header(uint8_t *packet, int size, int *offset, avdtp_media_packet_header_t *media_header){ int media_header_len = 12; // without crc int pos = *offset; if (size - pos < media_header_len){ printf("Not enough data to read media packet header, expected %d, received %d\n", media_header_len, size-pos); return 0; } media_header->version = packet[pos] & 0x03; media_header->padding = get_bit16(packet[pos],2); media_header->extension = get_bit16(packet[pos],3); media_header->csrc_count = (packet[pos] >> 4) & 0x0F; pos++; media_header->marker = get_bit16(packet[pos],0); media_header->payload_type = (packet[pos] >> 1) & 0x7F; pos++; media_header->sequence_number = big_endian_read_16(packet, pos); pos+=2; media_header->timestamp = big_endian_read_32(packet, pos); pos+=4; media_header->synchronization_source = big_endian_read_32(packet, pos); pos+=4; *offset = pos; return 1; } static void dump_sbc_configuration(media_codec_configuration_sbc_t configuration){ printf(" - num_channels: %d\n", configuration.num_channels); printf(" - sampling_frequency: %d\n", configuration.sampling_frequency); printf(" - channel_mode: %d\n", configuration.channel_mode); printf(" - block_length: %d\n", configuration.block_length); printf(" - subbands: %d\n", configuration.subbands); printf(" - allocation_method: %d\n", configuration.allocation_method); printf(" - bitpool_value [%d, %d] \n", configuration.min_bitpool_value, configuration.max_bitpool_value); printf("\n"); } static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ UNUSED(channel); UNUSED(size); uint16_t local_cid; uint8_t status = 0xFF; bd_addr_t adress; if (packet_type != HCI_EVENT_PACKET) return; if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; switch (packet[2]){ case AVRCP_SUBEVENT_CONNECTION_ESTABLISHED: { local_cid = avrcp_subevent_connection_established_get_avrcp_cid(packet); status = avrcp_subevent_connection_established_get_status(packet); if (status != ERROR_CODE_SUCCESS){ printf("AVRCP: Connection failed: status 0x%02x\n", status); avrcp_cid = 0; return; } avrcp_cid = local_cid; avrcp_connected = 1; avrcp_subevent_connection_established_get_bd_addr(packet, adress); printf("AVRCP: Connected to %s, cid 0x%02x\n", bd_addr_to_str(adress), avrcp_cid); // automatically enable notifications avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED); avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED); avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); return; } case AVRCP_SUBEVENT_CONNECTION_RELEASED: printf("AVRCP: Channel released: cid 0x%02x\n", avrcp_subevent_connection_released_get_avrcp_cid(packet)); avrcp_cid = 0; avrcp_connected = 0; return; default: break; } } static void avrcp_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ UNUSED(channel); UNUSED(size); uint8_t status = 0xFF; if (packet_type != HCI_EVENT_PACKET) return; if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; status = packet[5]; if (!avrcp_cid) return; // ignore INTERIM status if (status == AVRCP_CTYPE_RESPONSE_INTERIM){ switch (packet[2]){ case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED:{ uint32_t playback_position_ms = avrcp_subevent_notification_playback_pos_changed_get_playback_position_ms(packet); if (playback_position_ms == AVRCP_NO_TRACK_SELECTED_PLAYBACK_POSITION_CHANGED){ printf("AVRCP Controller: playback position changed, no track is selected\n"); } break; } default: break; } return; } memset(avrcp_subevent_value, 0, sizeof(avrcp_subevent_value)); switch (packet[2]){ case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_POS_CHANGED: printf("AVRCP Controller: Playback position changed, position %d ms\n", (unsigned int) avrcp_subevent_notification_playback_pos_changed_get_playback_position_ms(packet)); break; case AVRCP_SUBEVENT_NOTIFICATION_PLAYBACK_STATUS_CHANGED: printf("AVRCP Controller: Playback status changed %s\n", avrcp_play_status2str(avrcp_subevent_notification_playback_status_changed_get_play_status(packet))); return; case AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED: printf("AVRCP Controller: Playing content changed\n"); return; case AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED: printf("AVRCP Controller: Track changed\n"); return; case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED: printf("AVRCP Controller: Absolute volume changed %d\n", avrcp_subevent_notification_volume_changed_get_absolute_volume(packet)); return; case AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED: printf("AVRCP Controller: Changed\n"); return; case AVRCP_SUBEVENT_SHUFFLE_AND_REPEAT_MODE:{ uint8_t shuffle_mode = avrcp_subevent_shuffle_and_repeat_mode_get_shuffle_mode(packet); uint8_t repeat_mode = avrcp_subevent_shuffle_and_repeat_mode_get_repeat_mode(packet); printf("AVRCP Controller: %s, %s\n", avrcp_shuffle2str(shuffle_mode), avrcp_repeat2str(repeat_mode)); break; } case AVRCP_SUBEVENT_NOW_PLAYING_TRACK_INFO: printf("AVRCP Controller: Track: %d\n", avrcp_subevent_now_playing_track_info_get_track(packet)); break; case AVRCP_SUBEVENT_NOW_PLAYING_TOTAL_TRACKS_INFO: printf("AVRCP Controller: Total Tracks: %d\n", avrcp_subevent_now_playing_total_tracks_info_get_total_tracks(packet)); break; case AVRCP_SUBEVENT_NOW_PLAYING_TITLE_INFO: if (avrcp_subevent_now_playing_title_info_get_value_len(packet) > 0){ memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_title_info_get_value(packet), avrcp_subevent_now_playing_title_info_get_value_len(packet)); printf("AVRCP Controller: Title: %s\n", avrcp_subevent_value); } break; case AVRCP_SUBEVENT_NOW_PLAYING_ARTIST_INFO: if (avrcp_subevent_now_playing_artist_info_get_value_len(packet) > 0){ memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_artist_info_get_value(packet), avrcp_subevent_now_playing_artist_info_get_value_len(packet)); printf("AVRCP Controller: Artist: %s\n", avrcp_subevent_value); } break; case AVRCP_SUBEVENT_NOW_PLAYING_ALBUM_INFO: if (avrcp_subevent_now_playing_album_info_get_value_len(packet) > 0){ memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_album_info_get_value(packet), avrcp_subevent_now_playing_album_info_get_value_len(packet)); printf("AVRCP Controller: Album: %s\n", avrcp_subevent_value); } break; case AVRCP_SUBEVENT_NOW_PLAYING_GENRE_INFO: if (avrcp_subevent_now_playing_genre_info_get_value_len(packet) > 0){ memcpy(avrcp_subevent_value, avrcp_subevent_now_playing_genre_info_get_value(packet), avrcp_subevent_now_playing_genre_info_get_value_len(packet)); printf("AVRCP Controller: Genre: %s\n", avrcp_subevent_value); } break; case AVRCP_SUBEVENT_PLAY_STATUS: printf("AVRCP Controller: Song length %"PRIu32" ms, Song position %"PRIu32" ms, Play status %s\n", avrcp_subevent_play_status_get_song_length(packet), avrcp_subevent_play_status_get_song_position(packet), avrcp_play_status2str(avrcp_subevent_play_status_get_play_status(packet))); break; case AVRCP_SUBEVENT_OPERATION_COMPLETE: printf("AVRCP Controller: %s complete\n", avrcp_operation2str(avrcp_subevent_operation_complete_get_operation_id(packet))); break; case AVRCP_SUBEVENT_OPERATION_START: printf("AVRCP Controller: %s start\n", avrcp_operation2str(avrcp_subevent_operation_start_get_operation_id(packet))); break; case AVRCP_SUBEVENT_NOTIFICATION_EVENT_TRACK_REACHED_END: printf("AVRCP Controller: Track reached end\n"); break; case AVRCP_SUBEVENT_PLAYER_APPLICATION_VALUE_RESPONSE: printf("A2DP Sink : Set Player App Value %s\n", avrcp_ctype2str(avrcp_subevent_player_application_value_response_get_command_type(packet))); break; default: printf("AVRCP Controller: Event 0x%02x is not parsed\n", packet[2]); break; } } static void avrcp_volume_changed(uint8_t volume){ const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance(); if (audio){ audio->set_volume(volume); } } static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ UNUSED(channel); UNUSED(size); if (packet_type != HCI_EVENT_PACKET) return; if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return; uint8_t volume; char const * button_state; avrcp_operation_id_t operation_id; switch (packet[2]){ case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED: volume = avrcp_subevent_notification_volume_changed_get_absolute_volume(packet); volume_percentage = volume * 100 / 127; printf("AVRCP Target : Volume set to %d%% (%d)\n", volume_percentage, volume); avrcp_volume_changed(volume); break; case AVRCP_SUBEVENT_EVENT_IDS_QUERY: #ifdef SUPPORT_VOLUME_CHANGE_NOTIFICATION avrcp_target_supported_events(avrcp_cid, events_num, events, sizeof(events)); #else avrcp_target_supported_events(avrcp_cid, 0, NULL, 0); #endif break; case AVRCP_SUBEVENT_COMPANY_IDS_QUERY: avrcp_target_supported_companies(avrcp_cid, companies_num, companies, sizeof(companies)); break; case AVRCP_SUBEVENT_OPERATION: operation_id = avrcp_subevent_operation_get_operation_id(packet); button_state = avrcp_subevent_operation_get_button_pressed(packet) > 0 ? "PRESS" : "RELEASE"; switch (operation_id){ case AVRCP_OPERATION_ID_VOLUME_UP: printf("AVRCP Target : VOLUME UP (%s)\n", button_state); break; case AVRCP_OPERATION_ID_VOLUME_DOWN: printf("AVRCP Target : VOLUME UP (%s)\n", button_state); break; default: return; } break; default: printf("AVRCP Target : Event 0x%02x is not parsed\n", packet[2]); break; } } static void hci_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ UNUSED(channel); UNUSED(size); if (packet_type != HCI_EVENT_PACKET) return; if (hci_event_packet_get_type(packet) == HCI_EVENT_PIN_CODE_REQUEST) { bd_addr_t address; printf("Pin code request - using '0000'\n"); hci_event_pin_code_request_get_bd_addr(packet, address); gap_pin_code_response(address, "0000"); } } static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ UNUSED(channel); UNUSED(size); bd_addr_t address; uint8_t status; uint8_t channel_mode; uint8_t allocation_method; if (packet_type != HCI_EVENT_PACKET) return; if (hci_event_packet_get_type(packet) != HCI_EVENT_A2DP_META) return; switch (packet[2]){ case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_OTHER_CONFIGURATION: printf("A2DP Sink : Received non SBC codec - not implemented\n"); break; case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{ printf("A2DP Sink : Received SBC codec configuration\n"); sbc_configuration.reconfigure = a2dp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet); sbc_configuration.num_channels = a2dp_subevent_signaling_media_codec_sbc_configuration_get_num_channels(packet); sbc_configuration.sampling_frequency = a2dp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet); sbc_configuration.block_length = a2dp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet); sbc_configuration.subbands = a2dp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet); sbc_configuration.min_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet); sbc_configuration.max_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_max_bitpool_value(packet); allocation_method = a2dp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(packet); channel_mode = a2dp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet); // Adapt Bluetooth spec definition to SBC Encoder expected input sbc_configuration.allocation_method = (btstack_sbc_allocation_method_t)(allocation_method - 1); sbc_configuration.num_channels = SBC_CHANNEL_MODE_STEREO; switch (channel_mode){ case AVDTP_SBC_JOINT_STEREO: sbc_configuration.channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO; break; case AVDTP_SBC_STEREO: sbc_configuration.channel_mode = SBC_CHANNEL_MODE_STEREO; break; case AVDTP_SBC_DUAL_CHANNEL: sbc_configuration.channel_mode = SBC_CHANNEL_MODE_DUAL_CHANNEL; break; case AVDTP_SBC_MONO: sbc_configuration.channel_mode = SBC_CHANNEL_MODE_MONO; sbc_configuration.num_channels = 1; break; default: btstack_assert(false); break; } dump_sbc_configuration(sbc_configuration); if (sbc_configuration.reconfigure){ media_processing_close(); } // prepare media processing media_processing_init(sbc_configuration); break; } case A2DP_SUBEVENT_STREAM_ESTABLISHED: a2dp_subevent_stream_established_get_bd_addr(packet, address); status = a2dp_subevent_stream_established_get_status(packet); if (status != ERROR_CODE_SUCCESS){ printf("A2DP Sink : Streaming connection failed, status 0x%02x\n", status); break; } a2dp_cid = a2dp_subevent_stream_established_get_a2dp_cid(packet); printf("A2DP Sink : Streaming connection is established, address %s, cid 0x%02X, local seid %d\n", bd_addr_to_str(address), a2dp_cid, a2dp_local_seid); #ifdef HAVE_BTSTACK_STDIN // use address for outgoing connections memcpy(device_addr, address, 6); #endif break; case A2DP_SUBEVENT_STREAM_STARTED: printf("A2DP Sink : Stream started\n"); // audio stream is started when buffer reaches minimal level break; case A2DP_SUBEVENT_STREAM_SUSPENDED: printf("A2DP Sink : Stream paused\n"); media_processing_pause(); break; case A2DP_SUBEVENT_STREAM_RELEASED: printf("A2DP Sink : Stream released\n"); media_processing_close(); break; case A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED: printf("A2DP Sink : Signaling connection released\n"); media_processing_close(); break; default: printf("A2DP Sink : Not parsed 0x%02x\n", packet[2]); break; } } #ifdef HAVE_BTSTACK_STDIN static void show_usage(void){ bd_addr_t iut_address; gap_local_bd_addr(iut_address); printf("\n--- Bluetooth AVDTP Sink/AVRCP Connection Test Console %s ---\n", bd_addr_to_str(iut_address)); printf("b - AVDTP Sink create connection to addr %s\n", bd_addr_to_str(device_addr)); printf("B - AVDTP Sink disconnect\n"); printf("c - AVRCP create connection to addr %s\n", bd_addr_to_str(device_addr)); printf("C - AVRCP disconnect\n"); printf("w - delay report\n"); printf("\n--- Bluetooth AVRCP Commands %s ---\n", bd_addr_to_str(iut_address)); printf("O - get play status\n"); printf("j - get now playing info\n"); printf("k - play\n"); printf("K - stop\n"); printf("L - pause\n"); printf("u - start fast forward\n"); printf("U - stop fast forward\n"); printf("n - start rewind\n"); printf("N - stop rewind\n"); printf("i - forward\n"); printf("I - backward\n"); printf("M - mute\n"); printf("r - skip\n"); printf("q - query repeat and shuffle mode\n"); printf("v - repeat single track\n"); printf("x - repeat all tracks\n"); printf("X - disable repeat mode\n"); printf("z - shuffle all tracks\n"); printf("Z - disable shuffle mode\n"); printf("a/A - register/deregister TRACK_CHANGED\n"); printf("R/P - register/deregister PLAYBACK_POS_CHANGED\n"); printf("\n--- Volume Control ---\n"); printf("t - volume up for 10 percent\n"); printf("T - volume down for 10 percent\n"); printf("---\n"); } #endif #ifdef HAVE_BTSTACK_STDIN static void stdin_process(char cmd){ uint8_t status = ERROR_CODE_SUCCESS; uint8_t volume; switch (cmd){ case 'b': status = a2dp_sink_establish_stream(device_addr, a2dp_local_seid, &a2dp_cid); printf(" - Create AVDTP connection to addr %s, and local seid %d, expected cid 0x%02x.\n", bd_addr_to_str(device_addr), a2dp_local_seid, a2dp_cid); break; case 'B': printf(" - AVDTP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); a2dp_sink_disconnect(a2dp_cid); break; case 'c': printf(" - Create AVRCP connection to addr %s.\n", bd_addr_to_str(device_addr)); status = avrcp_connect(device_addr, &avrcp_cid); break; case 'C': printf(" - AVRCP disconnect from addr %s.\n", bd_addr_to_str(device_addr)); status = avrcp_disconnect(avrcp_cid); break; case '\n': case '\r': break; case 'w': printf("Send delay report\n"); avdtp_sink_delay_report(a2dp_cid, a2dp_local_seid, 100); break; // Volume Control case 't': volume_percentage = volume_percentage <= 90 ? volume_percentage + 10 : 100; volume = volume_percentage * 127 / 100; printf(" - volume up for 10 percent, %d%% (%d) \n", volume_percentage, volume); status = avrcp_target_volume_changed(avrcp_cid, volume); avrcp_volume_changed(volume); break; case 'T': volume_percentage = volume_percentage >= 10 ? volume_percentage - 10 : 0; volume = volume_percentage * 127 / 100; printf(" - volume down for 10 percent, %d%% (%d) \n", volume_percentage, volume); status = avrcp_target_volume_changed(avrcp_cid, volume); avrcp_volume_changed(volume); break; case 'O': printf(" - get play status\n"); status = avrcp_controller_get_play_status(avrcp_cid); break; case 'j': printf(" - get now playing info\n"); status = avrcp_controller_get_now_playing_info(avrcp_cid); break; case 'k': printf(" - play\n"); status = avrcp_controller_play(avrcp_cid); break; case 'K': printf(" - stop\n"); status = avrcp_controller_stop(avrcp_cid); break; case 'L': printf(" - pause\n"); status = avrcp_controller_pause(avrcp_cid); break; case 'u': printf(" - start fast forward\n"); status = avrcp_controller_press_and_hold_fast_forward(avrcp_cid); break; case 'U': printf(" - stop fast forward\n"); status = avrcp_controller_release_press_and_hold_cmd(avrcp_cid); break; case 'n': printf(" - start rewind\n"); status = avrcp_controller_press_and_hold_rewind(avrcp_cid); break; case 'N': printf(" - stop rewind\n"); status = avrcp_controller_release_press_and_hold_cmd(avrcp_cid); break; case 'i': printf(" - forward\n"); status = avrcp_controller_forward(avrcp_cid); break; case 'I': printf(" - backward\n"); status = avrcp_controller_backward(avrcp_cid); break; case 'M': printf(" - mute\n"); status = avrcp_controller_mute(avrcp_cid); break; case 'r': printf(" - skip\n"); status = avrcp_controller_skip(avrcp_cid); break; case 'q': printf(" - query repeat and shuffle mode\n"); status = avrcp_controller_query_shuffle_and_repeat_modes(avrcp_cid); break; case 'v': printf(" - repeat single track\n"); status = avrcp_controller_set_repeat_mode(avrcp_cid, AVRCP_REPEAT_MODE_SINGLE_TRACK); break; case 'x': printf(" - repeat all tracks\n"); status = avrcp_controller_set_repeat_mode(avrcp_cid, AVRCP_REPEAT_MODE_ALL_TRACKS); break; case 'X': printf(" - disable repeat mode\n"); status = avrcp_controller_set_repeat_mode(avrcp_cid, AVRCP_REPEAT_MODE_OFF); break; case 'z': printf(" - shuffle all tracks\n"); status = avrcp_controller_set_shuffle_mode(avrcp_cid, AVRCP_SHUFFLE_MODE_ALL_TRACKS); break; case 'Z': printf(" - disable shuffle mode\n"); status = avrcp_controller_set_shuffle_mode(avrcp_cid, AVRCP_SHUFFLE_MODE_OFF); break; case 'a': printf("AVRCP: enable notification TRACK_CHANGED\n"); avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); break; case 'A': printf("AVRCP: disable notification TRACK_CHANGED\n"); avrcp_controller_disable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED); break; case 'R': printf("AVRCP: enable notification PLAYBACK_POS_CHANGED\n"); avrcp_controller_enable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); break; case 'P': printf("AVRCP: disable notification PLAYBACK_POS_CHANGED\n"); avrcp_controller_disable_notification(avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED); break; default: show_usage(); return; } if (status != ERROR_CODE_SUCCESS){ printf("Could not perform command, status 0x%02x\n", status); } } #endif int btstack_main(int argc, const char * argv[]); int btstack_main(int argc, const char * argv[]){ UNUSED(argc); (void)argv; a2dp_and_avrcp_setup(); #ifdef HAVE_BTSTACK_STDIN // parse human readable Bluetooth address sscanf_bd_addr(device_addr_string, device_addr); btstack_stdin_setup(stdin_process); #endif // turn on! printf("Starting BTstack ...\n"); hci_power_control(HCI_POWER_ON); return 0; } /* EXAMPLE_END */