/*
* Copyright (C) 2023 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 BLUEKITCHEN
* GMBH 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 <inttypes.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "btstack.h"
#include "btstack_resample.h"
//#define AVRCP_BROWSING_ENABLED
#ifdef HAVE_BTSTACK_STDIN
#include "btstack_stdin.h"
#endif
#ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE
#include "btstack_sample_rate_compensation.h"
#endif
#include "btstack_ring_buffer.h"
#ifdef HAVE_POSIX_FILE_IO
#include "wav_util.h"
#define STORE_TO_WAV_FILE
#endif
#define NUM_CHANNELS 2
#define BYTES_PER_FRAME (2*NUM_CHANNELS)
#define MAX_SBC_FRAME_SIZE 120
#ifdef HAVE_BTSTACK_STDIN
static const char * device_addr_string = "00:1B:DC:08:E2:72"; // pts v5.0
static bd_addr_t device_addr;
#endif
#ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE
static btstack_sample_rate_compensation_t sample_rate_compensation;
#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];
// we support all configurations with bitpool 2-53
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
};
// WAV File
#ifdef STORE_TO_WAV_FILE
static uint32_t audio_frame_count = 0;
static char * wav_filename = "a2dp_sink_demo.wav";
#endif
// SBC Decoder for WAV file or live playback
static const btstack_sbc_decoder_t * sbc_decoder_instance;
static btstack_sbc_decoder_bluedroid_t sbc_decoder_context;
// ring buffer for SBC Frames
// below 30: add samples, 30-40: fine, above 40: drop samples
#define OPTIMAL_FRAMES_MIN 60
#define OPTIMAL_FRAMES_MAX 80
#define ADDITIONAL_FRAMES 30
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;
// overflow 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 media_initialized = 0;
static int audio_stream_started;
#ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE
static int l2cap_stream_started;
#endif
static btstack_resample_t resample_instance;
// temp storage of lower-layer request for audio samples
static int16_t * request_buffer;
static int request_frames;
// sink state
static int volume_percentage = 0;
static avrcp_battery_status_t battery_status = AVRCP_BATTERY_STATUS_WARNING;
#ifdef ENABLE_AVRCP_COVER_ART
static char a2dp_sink_demo_image_handle[8];
static avrcp_cover_art_client_t a2dp_sink_demo_cover_art_client;
static bool a2dp_sink_demo_cover_art_client_connected;
static uint16_t a2dp_sink_demo_cover_art_cid;
static uint8_t a2dp_sink_demo_ertm_buffer[2000];
static l2cap_ertm_config_t a2dp_sink_demo_ertm_config = {
1, // ertm mandatory
2, // max transmit, some tests require > 1
2000,
12000,
512, // l2cap ertm mtu
2,
2,
1, // 16-bit FCS
};
static bool a2dp_sink_cover_art_download_active;
static uint32_t a2dp_sink_cover_art_file_size;
#ifdef HAVE_POSIX_FILE_IO
static const char * a2dp_sink_demo_thumbnail_path = "cover.jpg";
static FILE * a2dp_sink_cover_art_file;
#endif
#endif
typedef struct {
uint8_t reconfigure;
uint8_t num_channels;
uint16_t sampling_frequency;
uint8_t block_length;
uint8_t subbands;
uint8_t min_bitpool_value;
uint8_t max_bitpool_value;
btstack_sbc_channel_mode_t channel_mode;
btstack_sbc_allocation_method_t allocation_method;
} media_codec_configuration_sbc_t;
typedef enum {
STREAM_STATE_CLOSED,
STREAM_STATE_OPEN,
STREAM_STATE_PLAYING,
STREAM_STATE_PAUSED,
} stream_state_t;
typedef struct {
uint8_t a2dp_local_seid;
uint8_t media_sbc_codec_configuration[4];
} a2dp_sink_demo_stream_endpoint_t;
static a2dp_sink_demo_stream_endpoint_t a2dp_sink_demo_stream_endpoint;
typedef struct {
bd_addr_t addr;
uint16_t a2dp_cid;
uint8_t a2dp_local_seid;
stream_state_t stream_state;
media_codec_configuration_sbc_t sbc_configuration;
} a2dp_sink_demo_a2dp_connection_t;
static a2dp_sink_demo_a2dp_connection_t a2dp_sink_demo_a2dp_connection;
typedef struct {
bd_addr_t addr;
uint16_t avrcp_cid;
bool playing;
uint16_t notifications_supported_by_target;
} a2dp_sink_demo_avrcp_connection_t;
static a2dp_sink_demo_avrcp_connection_t a2dp_sink_demo_avrcp_connection;
/* @section Main Application Setup
*
* @text The Listing MainConfiguration shows how to set up 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 AVRCP 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 in a 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 * packet, 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 setup_demo(void){
// init protocols
l2cap_init();
sdp_init();
#ifdef ENABLE_BLE
// Initialize LE Security Manager. Needed for cross-transport key derivation
sm_init();
#endif
#ifdef ENABLE_AVRCP_COVER_ART
goep_client_init();
avrcp_cover_art_client_init();
#endif
// Init profiles
a2dp_sink_init();
avrcp_init();
avrcp_controller_init();
avrcp_target_init();
// Configure A2DP Sink
a2dp_sink_register_packet_handler(&a2dp_sink_packet_handler);
a2dp_sink_register_media_handler(&handle_l2cap_media_data_packet);
a2dp_sink_demo_stream_endpoint_t * stream_endpoint = &a2dp_sink_demo_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),
stream_endpoint->media_sbc_codec_configuration, sizeof(stream_endpoint->media_sbc_codec_configuration));
btstack_assert(local_stream_endpoint != NULL);
// - Store stream enpoint's SEP ID, as it is used by A2DP API to identify the stream endpoint
stream_endpoint->a2dp_local_seid = avdtp_local_seid(local_stream_endpoint);
// Configure AVRCP Controller + Target
avrcp_register_packet_handler(&avrcp_packet_handler);
avrcp_controller_register_packet_handler(&avrcp_controller_packet_handler);
avrcp_target_register_packet_handler(&avrcp_target_packet_handler);
// Configure SDP
// - Create and register A2DP Sink service record
memset(sdp_avdtp_sink_service_buffer, 0, sizeof(sdp_avdtp_sink_service_buffer));
a2dp_sink_create_sdp_record(sdp_avdtp_sink_service_buffer, sdp_create_service_record_handle(),
AVDTP_SINK_FEATURE_MASK_HEADPHONE, NULL, NULL);
btstack_assert(de_get_len( sdp_avdtp_sink_service_buffer) <= sizeof(sdp_avdtp_sink_service_buffer));
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 = 1 << AVRCP_CONTROLLER_SUPPORTED_FEATURE_CATEGORY_PLAYER_OR_RECORDER;
#ifdef AVRCP_BROWSING_ENABLED
controller_supported_features |= 1 << AVRCP_CONTROLLER_SUPPORTED_FEATURE_BROWSING;
#endif
#ifdef ENABLE_AVRCP_COVER_ART
controller_supported_features |= 1 << AVRCP_CONTROLLER_SUPPORTED_FEATURE_COVER_ART_GET_LINKED_THUMBNAIL;
#endif
avrcp_controller_create_sdp_record(sdp_avrcp_controller_service_buffer, sdp_create_service_record_handle(),
controller_supported_features, NULL, NULL);
btstack_assert(de_get_len( sdp_avrcp_controller_service_buffer) <= sizeof(sdp_avrcp_controller_service_buffer));
sdp_register_service(sdp_avrcp_controller_service_buffer);
// - Create and register A2DP Sink service record
// - 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 = 1 << AVRCP_TARGET_SUPPORTED_FEATURE_CATEGORY_MONITOR_OR_AMPLIFIER;
avrcp_target_create_sdp_record(sdp_avrcp_target_service_buffer,
sdp_create_service_record_handle(), target_supported_features, NULL, NULL);
btstack_assert(de_get_len( sdp_avrcp_target_service_buffer) <= sizeof(sdp_avrcp_target_service_buffer));
sdp_register_service(sdp_avrcp_target_service_buffer);
// - Create and register Device ID (PnP) service record
memset(device_id_sdp_service_buffer, 0, sizeof(device_id_sdp_service_buffer));
device_id_create_sdp_record(device_id_sdp_service_buffer,
sdp_create_service_record_handle(), DEVICE_ID_VENDOR_ID_SOURCE_BLUETOOTH, BLUETOOTH_COMPANY_ID_BLUEKITCHEN_GMBH, 1, 1);
btstack_assert(de_get_len( device_id_sdp_service_buffer) <= sizeof(device_id_sdp_service_buffer));
sdp_register_service(device_id_sdp_service_buffer);
// Configure GAP - discovery / connection
// - Set local name with a template Bluetooth address, that will be automatically
// replaced with an 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");
// - Allow to show up in Bluetooth inquiry
gap_discoverable_control(1);
// - Set Class of Device - Service Class: Audio, Major Device Class: Audio, Minor: Loudspeaker
gap_set_class_of_device(0x200414);
// - Allow for role switch in general and sniff mode
gap_set_default_link_policy_settings( LM_LINK_POLICY_ENABLE_ROLE_SWITCH | LM_LINK_POLICY_ENABLE_SNIFF_MODE );
// - Allow for role switch on outgoing connections
// - This allows A2DP Source, e.g. smartphone, to become master when we re-connect to it.
gap_set_allow_role_switch(true);
// Register for HCI events
hci_event_callback_registration.callback = &hci_packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
// Inform about audio playback / test options
#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);
sbc_decoder_instance->decode_signed_16(&sbc_decoder_context, 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;
sbc_decoder_instance = btstack_sbc_decoder_bluedroid_init_instance(&sbc_decoder_context);
sbc_decoder_instance->configure(&sbc_decoder_context, SBC_MODE_STANDARD, handle_pcm_data, NULL);
#ifdef STORE_TO_WAV_FILE
wav_writer_open(wav_filename, configuration->num_channels, configuration->sampling_frequency);
#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;
#ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE
btstack_sample_rate_compensation_reset( &sample_rate_compensation, btstack_run_loop_get_time_ms() );
#endif
// 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;
#ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE
l2cap_stream_started = 0;
#endif
const btstack_audio_sink_t * audio = btstack_audio_sink_get_instance();
if (audio){
audio->stop_stream();
}
// discard pending data
btstack_ring_buffer_reset(&decoded_audio_ring_buffer);
btstack_ring_buffer_reset(&sbc_frame_ring_buffer);
}
static void media_processing_close(void){
if (!media_initialized) return;
media_initialized = 0;
audio_stream_started = 0;
sbc_frame_size = 0;
#ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE
l2cap_stream_started = 0;
#endif
#ifdef STORE_TO_WAV_FILE
wav_writer_close();
uint32_t total_frames_nr = sbc_decoder_context.good_frames_nr + sbc_decoder_context.bad_frames_nr + sbc_decoder_context.zero_frames_nr;
printf("WAV Writer: Decoding done. Processed %u SBC frames:\n - %d good\n - %d bad\n", total_frames_nr, sbc_decoder_context.good_frames_nr, total_frames_nr - sbc_decoder_context.good_frames_nr);
printf("WAV Writer: Wrote %u audio frames to wav file: %s\n", audio_frame_count, wav_filename);
#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;
int packet_length = size-pos;
uint8_t *packet_begin = packet+pos;
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){
sbc_decoder_instance->decode_signed_16(&sbc_decoder_context, 0, packet_begin, packet_length);
return;
}
// store sbc frame size for buffer management
sbc_frame_size = packet_length / sbc_header.num_frames;
int status = btstack_ring_buffer_write(&sbc_frame_ring_buffer, packet_begin, packet_length);
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;
#ifdef HAVE_BTSTACK_AUDIO_EFFECTIVE_SAMPLERATE
if( !l2cap_stream_started && audio_stream_started ) {
l2cap_stream_started = 1;
btstack_sample_rate_compensation_init( &sample_rate_compensation, btstack_run_loop_get_time_ms(), a2dp_sink_demo_a2dp_connection.sbc_configuration.sampling_frequency, FLOAT_TO_Q15(1.f) );
}
// update sample rate compensation
if( audio_stream_started && (audio != NULL)) {
uint32_t resampling_factor = btstack_sample_rate_compensation_update( &sample_rate_compensation, btstack_run_loop_get_time_ms(), sbc_header.num_frames*128, audio->get_samplerate() );
btstack_resample_set_factor(&resample_instance, resampling_factor);
// printf("sbc buffer level : %"PRIu32"\n", btstack_ring_buffer_bytes_available(&sbc_frame_ring_buffer));
}
#else
uint32_t resampling_factor;
// nominal factor (fixed-point 2^16) and compensation offset
uint32_t nominal_factor = 0x10000;
uint32_t compensation = 0x00100;
if (sbc_frames_in_buffer < OPTIMAL_FRAMES_MIN){
resampling_factor = nominal_factor - compensation; // stretch samples
} else if (sbc_frames_in_buffer <= OPTIMAL_FRAMES_MAX){
resampling_factor = nominal_factor; // nothing to do
} else {
resampling_factor = nominal_factor + compensation; // compress samples
}
btstack_resample_set_factor(&resample_instance, resampling_factor);
#endif
// 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 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");
}
}
#ifdef ENABLE_AVRCP_COVER_ART
static void a2dp_sink_demo_cover_art_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) {
UNUSED(channel);
UNUSED(size);
uint8_t status;
uint16_t cid;
switch (packet_type){
case BIP_DATA_PACKET:
if (a2dp_sink_cover_art_download_active){
a2dp_sink_cover_art_file_size += size;
#ifdef HAVE_POSIX_FILE_IO
fwrite(packet, 1, size, a2dp_sink_cover_art_file);
#else
printf("Cover art : TODO - store %u bytes image data\n", size);
#endif
} else {
uint16_t i;
for (i=0;i<size;i++){
putchar(packet[i]);
}
printf("\n");
}
break;
case HCI_EVENT_PACKET:
switch (hci_event_packet_get_type(packet)){
case HCI_EVENT_AVRCP_META:
switch (hci_event_avrcp_meta_get_subevent_code(packet)){
case AVRCP_SUBEVENT_COVER_ART_CONNECTION_ESTABLISHED:
status = avrcp_subevent_cover_art_connection_established_get_status(packet);
cid = avrcp_subevent_cover_art_connection_established_get_cover_art_cid(packet);
if (status == ERROR_CODE_SUCCESS){
printf("Cover Art : connection established, cover art cid 0x%02x\n", cid);
a2dp_sink_demo_cover_art_client_connected = true;
} else {
printf("Cover Art : connection failed, status 0x%02x\n", status);
a2dp_sink_demo_cover_art_cid = 0;
}
break;
case AVRCP_SUBEVENT_COVER_ART_OPERATION_COMPLETE:
if (a2dp_sink_cover_art_download_active){
a2dp_sink_cover_art_download_active = false;
#ifdef HAVE_POSIX_FILE_IO
printf("Cover Art : download of '%s complete, size %u bytes'\n",
a2dp_sink_demo_thumbnail_path, a2dp_sink_cover_art_file_size);
fclose(a2dp_sink_cover_art_file);
a2dp_sink_cover_art_file = NULL;
#else
printf("Cover Art: download completed\n");
#endif
}
break;
case AVRCP_SUBEVENT_COVER_ART_CONNECTION_RELEASED:
a2dp_sink_demo_cover_art_client_connected = false;
a2dp_sink_demo_cover_art_cid = 0;
printf("Cover Art : connection released 0x%02x\n",
avrcp_subevent_cover_art_connection_released_get_cover_art_cid(packet));
break;
default:
break;
}
break;
default:
break;
}
break;
default:
break;
}
}
static uint8_t a2dp_sink_demo_cover_art_connect(void) {
uint8_t status;
status = avrcp_cover_art_client_connect(&a2dp_sink_demo_cover_art_client, a2dp_sink_demo_cover_art_packet_handler,
device_addr, a2dp_sink_demo_ertm_buffer,
sizeof(a2dp_sink_demo_ertm_buffer), &a2dp_sink_demo_ertm_config,
&a2dp_sink_demo_cover_art_cid);
return status;
}
#endif
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;
bd_addr_t address;
a2dp_sink_demo_avrcp_connection_t * connection = &a2dp_sink_demo_avrcp_connection;
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);
connection->avrcp_cid = 0;
return;
}
connection->avrcp_cid = local_cid;
avrcp_subevent_connection_established_get_bd_addr(packet, address);
printf("AVRCP: Connected to %s, cid 0x%02x\n", bd_addr_to_str(address), connection->avrcp_cid);
#ifdef HAVE_BTSTACK_STDIN
// use address for outgoing connections
avrcp_subevent_connection_established_get_bd_addr(packet, device_addr);
#endif
avrcp_target_support_event(connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED);
avrcp_target_support_event(connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED);
avrcp_target_battery_status_changed(connection->avrcp_cid, battery_status);
// query supported events:
avrcp_controller_get_supported_events(connection->avrcp_cid);
return;
}
case AVRCP_SUBEVENT_CONNECTION_RELEASED:
printf("AVRCP: Channel released: cid 0x%02x\n", avrcp_subevent_connection_released_get_avrcp_cid(packet));
connection->avrcp_cid = 0;
connection->notifications_supported_by_target = 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);
// helper to print c strings
uint8_t avrcp_subevent_value[256];
uint8_t play_status;
uint8_t event_id;
a2dp_sink_demo_avrcp_connection_t * avrcp_connection = &a2dp_sink_demo_avrcp_connection;
if (packet_type != HCI_EVENT_PACKET) return;
if (hci_event_packet_get_type(packet) != HCI_EVENT_AVRCP_META) return;
if (avrcp_connection->avrcp_cid == 0) return;
memset(avrcp_subevent_value, 0, sizeof(avrcp_subevent_value));
switch (packet[2]){
case AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID:
avrcp_connection->notifications_supported_by_target |= (1 << avrcp_subevent_get_capability_event_id_get_event_id(packet));
break;
case AVRCP_SUBEVENT_GET_CAPABILITY_EVENT_ID_DONE:
printf("AVRCP Controller: supported notifications by target:\n");
for (event_id = (uint8_t) AVRCP_NOTIFICATION_EVENT_FIRST_INDEX; event_id < (uint8_t) AVRCP_NOTIFICATION_EVENT_LAST_INDEX; event_id++){
printf(" - [%s] %s\n",
(avrcp_connection->notifications_supported_by_target & (1 << event_id)) != 0 ? "X" : " ",
avrcp_notification2str((avrcp_notification_event_id_t)event_id));
}
printf("\n\n");
// automatically enable notifications
avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED);
avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED);
avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED);
#ifdef ENABLE_AVRCP_COVER_ART
// image handles become invalid on player change, registe for notifications
avrcp_controller_enable_notification(a2dp_sink_demo_avrcp_connection.avrcp_cid, AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED);
// trigger cover art client connection
a2dp_sink_demo_cover_art_connect();
#endif
break;
case AVRCP_SUBEVENT_NOTIFICATION_STATE:
event_id = (avrcp_notification_event_id_t)avrcp_subevent_notification_state_get_event_id(packet);
printf("AVRCP Controller: %s notification registered\n", avrcp_notification2str(event_id));
break;
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)));
play_status = avrcp_subevent_notification_playback_status_changed_get_play_status(packet);
switch (play_status){
case AVRCP_PLAYBACK_STATUS_PLAYING:
avrcp_connection->playing = true;
break;
default:
avrcp_connection->playing = false;
break;
}
break;
case AVRCP_SUBEVENT_NOTIFICATION_NOW_PLAYING_CONTENT_CHANGED:
printf("AVRCP Controller: Playing content changed\n");
break;
case AVRCP_SUBEVENT_NOTIFICATION_TRACK_CHANGED:
printf("AVRCP Controller: Track changed\n");
break;
case AVRCP_SUBEVENT_NOTIFICATION_AVAILABLE_PLAYERS_CHANGED:
printf("AVRCP Controller: Available Players Changed\n");
break;
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("AVRCP Controller: Set Player App Value %s\n", avrcp_ctype2str(avrcp_subevent_player_application_value_response_get_command_type(packet)));
break;
#ifdef ENABLE_AVRCP_COVER_ART
case AVRCP_SUBEVENT_NOTIFICATION_EVENT_UIDS_CHANGED:
if (a2dp_sink_demo_cover_art_client_connected){
printf("AVRCP Controller: UIDs changed -> disconnect cover art client\n");
avrcp_cover_art_client_disconnect(a2dp_sink_demo_cover_art_cid);
}
break;
case AVRCP_SUBEVENT_NOW_PLAYING_COVER_ART_INFO:
if (avrcp_subevent_now_playing_cover_art_info_get_value_len(packet) == 7){
memcpy(a2dp_sink_demo_image_handle, avrcp_subevent_now_playing_cover_art_info_get_value(packet), 7);
printf("AVRCP Controller: Cover Art %s\n", a2dp_sink_demo_image_handle);
}
break;
#endif
default:
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_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 DOWN (%s)\n", button_state);
break;
default:
return;
}
break;
default:
printf("AVRCP Target : Event 0x%02x is not parsed\n", packet[2]);
break;
}
}
static void a2dp_sink_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
UNUSED(size);
uint8_t status;
uint8_t allocation_method;
if (packet_type != HCI_EVENT_PACKET) return;
if (hci_event_packet_get_type(packet) != HCI_EVENT_A2DP_META) return;
a2dp_sink_demo_a2dp_connection_t * a2dp_conn = &a2dp_sink_demo_a2dp_connection;
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");
a2dp_conn->sbc_configuration.reconfigure = a2dp_subevent_signaling_media_codec_sbc_configuration_get_reconfigure(packet);
a2dp_conn->sbc_configuration.num_channels = a2dp_subevent_signaling_media_codec_sbc_configuration_get_num_channels(packet);
a2dp_conn->sbc_configuration.sampling_frequency = a2dp_subevent_signaling_media_codec_sbc_configuration_get_sampling_frequency(packet);
a2dp_conn->sbc_configuration.block_length = a2dp_subevent_signaling_media_codec_sbc_configuration_get_block_length(packet);
a2dp_conn->sbc_configuration.subbands = a2dp_subevent_signaling_media_codec_sbc_configuration_get_subbands(packet);
a2dp_conn->sbc_configuration.min_bitpool_value = a2dp_subevent_signaling_media_codec_sbc_configuration_get_min_bitpool_value(packet);
a2dp_conn->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);
// Adapt Bluetooth spec definition to SBC Encoder expected input
a2dp_conn->sbc_configuration.allocation_method = (btstack_sbc_allocation_method_t)(allocation_method - 1);
switch (a2dp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(packet)){
case AVDTP_CHANNEL_MODE_JOINT_STEREO:
a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_JOINT_STEREO;
break;
case AVDTP_CHANNEL_MODE_STEREO:
a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_STEREO;
break;
case AVDTP_CHANNEL_MODE_DUAL_CHANNEL:
a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_DUAL_CHANNEL;
break;
case AVDTP_CHANNEL_MODE_MONO:
a2dp_conn->sbc_configuration.channel_mode = SBC_CHANNEL_MODE_MONO;
break;
default:
btstack_assert(false);
break;
}
dump_sbc_configuration(&a2dp_conn->sbc_configuration);
break;
}
case A2DP_SUBEVENT_STREAM_ESTABLISHED:
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_subevent_stream_established_get_bd_addr(packet, a2dp_conn->addr);
a2dp_conn->a2dp_cid = a2dp_subevent_stream_established_get_a2dp_cid(packet);
a2dp_conn->a2dp_local_seid = a2dp_subevent_stream_established_get_local_seid(packet);
a2dp_conn->stream_state = STREAM_STATE_OPEN;
printf("A2DP Sink : Streaming connection is established, address %s, cid 0x%02x, local seid %d\n",
bd_addr_to_str(a2dp_conn->addr), a2dp_conn->a2dp_cid, a2dp_conn->a2dp_local_seid);
#ifdef HAVE_BTSTACK_STDIN
// use address for outgoing connections
memcpy(device_addr, a2dp_conn->addr, 6);
#endif
break;
#ifdef ENABLE_AVDTP_ACCEPTOR_EXPLICIT_START_STREAM_CONFIRMATION
case A2DP_SUBEVENT_START_STREAM_REQUESTED:
printf("A2DP Sink : Explicit Accept to start stream, local_seid %d\n", a2dp_subevent_start_stream_requested_get_local_seid(packet));
a2dp_sink_start_stream_accept(a2dp_cid, a2dp_local_seid);
break;
#endif
case A2DP_SUBEVENT_STREAM_STARTED:
printf("A2DP Sink : Stream started\n");
a2dp_conn->stream_state = STREAM_STATE_PLAYING;
if (a2dp_conn->sbc_configuration.reconfigure){
media_processing_close();
}
// prepare media processing
media_processing_init(&a2dp_conn->sbc_configuration);
// audio stream is started when buffer reaches minimal level
break;
case A2DP_SUBEVENT_STREAM_SUSPENDED:
printf("A2DP Sink : Stream paused\n");
a2dp_conn->stream_state = STREAM_STATE_PAUSED;
media_processing_pause();
break;
case A2DP_SUBEVENT_STREAM_RELEASED:
printf("A2DP Sink : Stream released\n");
a2dp_conn->stream_state = STREAM_STATE_CLOSED;
media_processing_close();
break;
case A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED:
printf("A2DP Sink : Signaling connection released\n");
a2dp_conn->a2dp_cid = 0;
media_processing_close();
break;
default:
break;
}
}
#ifdef HAVE_BTSTACK_STDIN
static void show_usage(void){
bd_addr_t iut_address;
gap_local_bd_addr(iut_address);
printf("\n--- A2DP Sink Demo Console %s ---\n", bd_addr_to_str(iut_address));
printf("b - A2DP Sink create connection to addr %s\n", bd_addr_to_str(device_addr));
printf("B - A2DP Sink disconnect\n");
printf("\n--- AVRCP Controller ---\n");
printf("c - AVRCP create connection to addr %s\n", bd_addr_to_str(device_addr));
printf("C - AVRCP disconnect\n");
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("w - delay report\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("s/S - send/release long button press REWIND\n");
printf("\n--- Volume and Battery Control ---\n");
printf("t - volume up for 10 percent\n");
printf("T - volume down for 10 percent\n");
printf("V - toggle Battery status from AVRCP_BATTERY_STATUS_NORMAL to AVRCP_BATTERY_STATUS_FULL_CHARGE\n");
#ifdef ENABLE_AVRCP_COVER_ART
printf("\n--- Cover Art Client ---\n");
printf("d - connect to addr %s\n", bd_addr_to_str(device_addr));
printf("D - disconnect\n");
if (a2dp_sink_demo_cover_art_client_connected == false){
if (a2dp_sink_demo_avrcp_connection.avrcp_cid == 0){
printf("Not connected, press 'b' or 'c' to first connect AVRCP, then press 'd' to connect cover art client\n");
} else {
printf("Not connected, press 'd' to connect cover art client\n");
}
} else if (a2dp_sink_demo_image_handle[0] == 0){
printf("No image handle, use 'j' to get current track info\n");
}
printf("---\n");
#endif
}
#endif
#ifdef HAVE_BTSTACK_STDIN
static void stdin_process(char cmd){
uint8_t status = ERROR_CODE_SUCCESS;
uint8_t volume;
avrcp_battery_status_t old_battery_status;
a2dp_sink_demo_a2dp_connection_t * a2dp_connection = &a2dp_sink_demo_a2dp_connection;
a2dp_sink_demo_avrcp_connection_t * avrcp_connection = &a2dp_sink_demo_avrcp_connection;
switch (cmd){
case 'b':
status = a2dp_sink_establish_stream(device_addr, &a2dp_connection->a2dp_cid);
printf(" - Create AVDTP connection to addr %s, and local seid %d, cid 0x%02x.\n",
bd_addr_to_str(device_addr), a2dp_connection->a2dp_local_seid, a2dp_connection->a2dp_cid);
break;
case 'B':
printf(" - AVDTP disconnect from addr %s.\n", bd_addr_to_str(device_addr));
a2dp_sink_disconnect(a2dp_connection->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_connection->avrcp_cid);
break;
case 'C':
printf(" - AVRCP disconnect from addr %s.\n", bd_addr_to_str(device_addr));
status = avrcp_disconnect(avrcp_connection->avrcp_cid);
break;
case '\n':
case '\r':
break;
case 'w':
printf("Send delay report\n");
avdtp_sink_delay_report(a2dp_connection->a2dp_cid, a2dp_connection->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_connection->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_connection->avrcp_cid, volume);
avrcp_volume_changed(volume);
break;
case 'V':
old_battery_status = battery_status;
if (battery_status < AVRCP_BATTERY_STATUS_FULL_CHARGE){
battery_status = (avrcp_battery_status_t)((uint8_t) battery_status + 1);
} else {
battery_status = AVRCP_BATTERY_STATUS_NORMAL;
}
printf(" - toggle battery value, old %d, new %d\n", old_battery_status, battery_status);
status = avrcp_target_battery_status_changed(avrcp_connection->avrcp_cid, battery_status);
break;
case 'O':
printf(" - get play status\n");
status = avrcp_controller_get_play_status(avrcp_connection->avrcp_cid);
break;
case 'j':
printf(" - get now playing info\n");
status = avrcp_controller_get_now_playing_info(avrcp_connection->avrcp_cid);
break;
case 'k':
printf(" - play\n");
status = avrcp_controller_play(avrcp_connection->avrcp_cid);
break;
case 'K':
printf(" - stop\n");
status = avrcp_controller_stop(avrcp_connection->avrcp_cid);
break;
case 'L':
printf(" - pause\n");
status = avrcp_controller_pause(avrcp_connection->avrcp_cid);
break;
case 'u':
printf(" - start fast forward\n");
status = avrcp_controller_press_and_hold_fast_forward(avrcp_connection->avrcp_cid);
break;
case 'U':
printf(" - stop fast forward\n");
status = avrcp_controller_release_press_and_hold_cmd(avrcp_connection->avrcp_cid);
break;
case 'n':
printf(" - start rewind\n");
status = avrcp_controller_press_and_hold_rewind(avrcp_connection->avrcp_cid);
break;
case 'N':
printf(" - stop rewind\n");
status = avrcp_controller_release_press_and_hold_cmd(avrcp_connection->avrcp_cid);
break;
case 'i':
printf(" - forward\n");
status = avrcp_controller_forward(avrcp_connection->avrcp_cid);
break;
case 'I':
printf(" - backward\n");
status = avrcp_controller_backward(avrcp_connection->avrcp_cid);
break;
case 'M':
printf(" - mute\n");
status = avrcp_controller_mute(avrcp_connection->avrcp_cid);
break;
case 'r':
printf(" - skip\n");
status = avrcp_controller_skip(avrcp_connection->avrcp_cid);
break;
case 'q':
printf(" - query repeat and shuffle mode\n");
status = avrcp_controller_query_shuffle_and_repeat_modes(avrcp_connection->avrcp_cid);
break;
case 'v':
printf(" - repeat single track\n");
status = avrcp_controller_set_repeat_mode(avrcp_connection->avrcp_cid, AVRCP_REPEAT_MODE_SINGLE_TRACK);
break;
case 'x':
printf(" - repeat all tracks\n");
status = avrcp_controller_set_repeat_mode(avrcp_connection->avrcp_cid, AVRCP_REPEAT_MODE_ALL_TRACKS);
break;
case 'X':
printf(" - disable repeat mode\n");
status = avrcp_controller_set_repeat_mode(avrcp_connection->avrcp_cid, AVRCP_REPEAT_MODE_OFF);
break;
case 'z':
printf(" - shuffle all tracks\n");
status = avrcp_controller_set_shuffle_mode(avrcp_connection->avrcp_cid, AVRCP_SHUFFLE_MODE_ALL_TRACKS);
break;
case 'Z':
printf(" - disable shuffle mode\n");
status = avrcp_controller_set_shuffle_mode(avrcp_connection->avrcp_cid, AVRCP_SHUFFLE_MODE_OFF);
break;
case 'a':
printf("AVRCP: enable notification TRACK_CHANGED\n");
status = avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED);
break;
case 'A':
printf("AVRCP: disable notification TRACK_CHANGED\n");
status = avrcp_controller_disable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED);
break;
case 'R':
printf("AVRCP: enable notification PLAYBACK_POS_CHANGED\n");
status = avrcp_controller_enable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED);
break;
case 'P':
printf("AVRCP: disable notification PLAYBACK_POS_CHANGED\n");
status = avrcp_controller_disable_notification(avrcp_connection->avrcp_cid, AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED);
break;
case 's':
printf("AVRCP: send long button press REWIND\n");
status = avrcp_controller_start_press_and_hold_cmd(avrcp_connection->avrcp_cid, AVRCP_OPERATION_ID_REWIND);
break;
case 'S':
printf("AVRCP: release long button press REWIND\n");
status = avrcp_controller_release_press_and_hold_cmd(avrcp_connection->avrcp_cid);
break;
#ifdef ENABLE_AVRCP_COVER_ART
case 'd':
printf(" - Create AVRCP Cover Art connection to addr %s.\n", bd_addr_to_str(device_addr));
status = a2dp_sink_demo_cover_art_connect();
break;
case 'D':
printf(" - AVRCP Cover Art disconnect from addr %s.\n", bd_addr_to_str(device_addr));
status = avrcp_cover_art_client_disconnect(a2dp_sink_demo_cover_art_cid);
break;
case '@':
printf("Get linked thumbnail for '%s'\n", a2dp_sink_demo_image_handle);
#ifdef HAVE_POSIX_FILE_IO
a2dp_sink_cover_art_file = fopen(a2dp_sink_demo_thumbnail_path, "w");
#endif
a2dp_sink_cover_art_download_active = true;
a2dp_sink_cover_art_file_size = 0;
status = avrcp_cover_art_client_get_linked_thumbnail(a2dp_sink_demo_cover_art_cid, a2dp_sink_demo_image_handle);
break;
#endif
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;
setup_demo();
#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 */