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@milamikica @mringwal
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/*
* 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_source_demo.c"
/*
* a2dp_source_demo.c
*/
// *****************************************************************************
/* EXAMPLE_START(a2dp_source_demo): Serve audio stream and handle remote playback control and queries.
*
* @text This A2DP Source example demonstrates how to send an audio data stream
* to a remote A2DP Sink device and how to switch between two audio data sources.
* In addition, the AVRCP Target is used to answer queries on currently played media,
* as well as to handle remote playback control, i.e. play, stop, repeat, etc.
*
* @test To test with a remote device, e.g. a Bluetooth speaker,
* set the device_addr_string to the Bluetooth address of your
* remote device in the code, and use the UI to connect and start playback.
* Tap SPACE on the console to show the available commands.
*/
// *****************************************************************************
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "btstack.h"
#include "hxcmod.h"
#include "mods/mod.h"
// logarithmic volume reduction, samples are divided by 2^x
// #define VOLUME_REDUCTION 3
// #undef HAVE_BTSTACK_STDIN
//#define AVRCP_BROWSING_ENABLED
#define NUM_CHANNELS 2
#define A2DP_SAMPLE_RATE 44100
#define BYTES_PER_AUDIO_SAMPLE (2*NUM_CHANNELS)
#define AUDIO_TIMEOUT_MS 10
#define TABLE_SIZE_441HZ 100
#define SBC_STORAGE_SIZE 1030
typedef enum {
STREAM_SINE = 0,
STREAM_MOD,
STREAM_PTS_TEST
} stream_data_source_t;
typedef struct {
uint16_t a2dp_cid;
uint8_t local_seid;
uint8_t stream_opened;
uint16_t avrcp_cid;
uint32_t time_audio_data_sent; // ms
uint32_t acc_num_missed_samples;
uint32_t samples_ready;
btstack_timer_source_t audio_timer;
uint8_t streaming;
int max_media_payload_size;
uint8_t sbc_storage[SBC_STORAGE_SIZE];
uint16_t sbc_storage_count;
uint8_t sbc_ready_to_send;
} a2dp_media_sending_context_t;
static uint8_t media_sbc_codec_capabilities[] = {
(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 const int16_t sine_int16[] = {
0, 2057, 4107, 6140, 8149, 10126, 12062, 13952, 15786, 17557,
19260, 20886, 22431, 23886, 25247, 26509, 27666, 28714, 29648, 30466,
31163, 31738, 32187, 32509, 32702, 32767, 32702, 32509, 32187, 31738,
31163, 30466, 29648, 28714, 27666, 26509, 25247, 23886, 22431, 20886,
19260, 17557, 15786, 13952, 12062, 10126, 8149, 6140, 4107, 2057,
0, -2057, -4107, -6140, -8149, -10126, -12062, -13952, -15786, -17557,
-19260, -20886, -22431, -23886, -25247, -26509, -27666, -28714, -29648, -30466,
-31163, -31738, -32187, -32509, -32702, -32767, -32702, -32509, -32187, -31738,
-31163, -30466, -29648, -28714, -27666, -26509, -25247, -23886, -22431, -20886,
-19260, -17557, -15786, -13952, -12062, -10126, -8149, -6140, -4107, -2057,
};
typedef struct {
int reconfigure;
int num_channels;
int sampling_frequency;
int channel_mode;
int block_length;
int subbands;
int allocation_method;
int min_bitpool_value;
int max_bitpool_value;
int frames_per_buffer;
} avdtp_media_codec_configuration_sbc_t;
static btstack_packet_callback_registration_t hci_event_callback_registration;
// pts: static const char * device_addr_string = "00:1B:DC:08:0A:A5";
// mac 2013: static const char * device_addr_string = "84:38:35:65:d1:15";
// phone 2013: static const char * device_addr_string = "D8:BB:2C:DF:F0:F2";
// Minijambox:
static const char * device_addr_string = "00:21:3C:AC:F7:38";
// Philips SHB9100: static const char * device_addr_string = "00:22:37:05:FD:E8";
// RT-B6: static const char * device_addr_string = "00:75:58:FF:C9:7D";
// BT dongle: static const char * device_addr_string = "00:1A:7D:DA:71:0A";
// Sony MDR-ZX330BT static const char * device_addr_string = "00:18:09:28:50:18";
// Panda (BM6) static const char * device_addr_string = "4F:3F:66:52:8B:E0";
static bd_addr_t device_addr;
static uint8_t sdp_a2dp_source_service_buffer[150];
static uint8_t sdp_avrcp_target_service_buffer[200];
static uint8_t sdp_avrcp_controller_service_buffer[200];
static avdtp_media_codec_configuration_sbc_t sbc_configuration;
static btstack_sbc_encoder_state_t sbc_encoder_state;
static uint8_t media_sbc_codec_configuration[4];
static a2dp_media_sending_context_t media_tracker;
static stream_data_source_t data_source;
static int sine_phase;
static int hxcmod_initialized;
static modcontext mod_context;
static tracker_buffer_state trkbuf;
static uint16_t avrcp_controller_cid = 0;
/* AVRCP Target context START */
static const uint8_t subunit_info[] = {
0,0,0,0,
1,1,1,1,
2,2,2,2,
3,3,3,3,
4,4,4,4,
5,5,5,5,
6,6,6,6,
7,7,7,7
};
static uint32_t company_id = 0x112233;
static uint8_t companies_num = 1;
static uint8_t companies[] = {
0x00, 0x19, 0x58 //BT SIG registered CompanyID
};
static uint8_t events_num = 13;
static uint8_t events[] = {
AVRCP_NOTIFICATION_EVENT_PLAYBACK_STATUS_CHANGED,
AVRCP_NOTIFICATION_EVENT_TRACK_CHANGED,
AVRCP_NOTIFICATION_EVENT_TRACK_REACHED_END,
AVRCP_NOTIFICATION_EVENT_TRACK_REACHED_START,
AVRCP_NOTIFICATION_EVENT_PLAYBACK_POS_CHANGED,
AVRCP_NOTIFICATION_EVENT_BATT_STATUS_CHANGED,
AVRCP_NOTIFICATION_EVENT_SYSTEM_STATUS_CHANGED,
AVRCP_NOTIFICATION_EVENT_PLAYER_APPLICATION_SETTING_CHANGED,
AVRCP_NOTIFICATION_EVENT_NOW_PLAYING_CONTENT_CHANGED,
AVRCP_NOTIFICATION_EVENT_AVAILABLE_PLAYERS_CHANGED,
AVRCP_NOTIFICATION_EVENT_ADDRESSED_PLAYER_CHANGED,
AVRCP_NOTIFICATION_EVENT_UIDS_CHANGED,
AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED
};
typedef struct {
uint8_t track_id[8];
uint32_t song_length_ms;
avrcp_playback_status_t status;
uint32_t song_position_ms; // 0xFFFFFFFF if not supported
} avrcp_play_status_info_t;
// python -c "print('a'*512)"
static const char title[] = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
avrcp_track_t tracks[] = {
{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}, 1, "Sine", "Generated", "A2DP Source Demo", "monotone", 12345},
{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}, 2, "Nao-deceased", "Decease", "A2DP Source Demo", "vivid", 12345},
{{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}, 3, (char *)title, "Decease", "A2DP Source Demo", "vivid", 12345},
};
int current_track_index;
avrcp_play_status_info_t play_info;
/* AVRCP Target context END */
/* @section Main Application Setup
*
* @text The Listing MainConfiguration shows how to setup AD2P Source and AVRCP Target services.
*/
/* LISTING_START(MainConfiguration): Setup Audio Source and AVRCP Target services */
static void a2dp_source_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t * event, uint16_t event_size);
static void avrcp_target_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);
#ifdef HAVE_BTSTACK_STDIN
static void stdin_process(char cmd);
#endif
static int a2dp_source_and_avrcp_services_init(void){
l2cap_init();
// Initialize A2DP Source.
a2dp_source_init();
a2dp_source_register_packet_handler(&a2dp_source_packet_handler);
// Create stream endpoint.
avdtp_stream_endpoint_t * local_stream_endpoint = a2dp_source_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 Source: not enough memory to create local stream endpoint\n");
return 1;
}
media_tracker.local_seid = avdtp_local_seid(local_stream_endpoint);
// Initialize AVRCP Target.
avrcp_target_init();
avrcp_target_register_packet_handler(&avrcp_target_packet_handler);
// Initialize AVRCP Controller
avrcp_controller_init();
avrcp_controller_register_packet_handler(&avrcp_controller_packet_handler);
// Initialize SDP,
sdp_init();
// Create A2DP Source service record and register it with SDP.
memset(sdp_a2dp_source_service_buffer, 0, sizeof(sdp_a2dp_source_service_buffer));
a2dp_source_create_sdp_record(sdp_a2dp_source_service_buffer, 0x10002, 1, NULL, NULL);
sdp_register_service(sdp_a2dp_source_service_buffer);
// Create AVRCP target service record and register it with SDP.
memset(sdp_avrcp_target_service_buffer, 0, sizeof(sdp_avrcp_target_service_buffer));
uint16_t supported_features = (1 << AVRCP_TARGET_SUPPORTED_FEATURE_CATEGORY_PLAYER_OR_RECORDER);
#ifdef AVRCP_BROWSING_ENABLED
supported_features |= (1 << AVRCP_TARGET_SUPPORTED_FEATURE_BROWSING);
#endif
avrcp_target_create_sdp_record(sdp_avrcp_target_service_buffer, 0x10001, supported_features, NULL, NULL);
sdp_register_service(sdp_avrcp_target_service_buffer);
// setup AVRCP Controller
memset(sdp_avrcp_controller_service_buffer, 0, sizeof(sdp_avrcp_controller_service_buffer));
uint16_t controller_supported_features = (1 << AVRCP_CONTROLLER_SUPPORTED_FEATURE_CATEGORY_MONITOR_OR_AMPLIFIER);
avrcp_controller_create_sdp_record(sdp_avrcp_controller_service_buffer, 0x10002, controller_supported_features, NULL, NULL);
sdp_register_service(sdp_avrcp_controller_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 Source 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 = &a2dp_source_packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
hxcmod_initialized = hxcmod_init(&mod_context);
if (hxcmod_initialized){
hxcmod_setcfg(&mod_context, A2DP_SAMPLE_RATE, 16, 1, 1, 1);
hxcmod_load(&mod_context, (void *) &mod_data, mod_len);
printf("loaded mod '%s', size %u\n", mod_name, mod_len);
}
// Parse human readable Bluetooth address.
sscanf_bd_addr(device_addr_string, device_addr);
#ifdef HAVE_BTSTACK_STDIN
btstack_stdin_setup(stdin_process);
#endif
return 0;
}
/* LISTING_END */
static void a2dp_demo_send_media_packet(void){
int num_bytes_in_frame = btstack_sbc_encoder_sbc_buffer_length();
int bytes_in_storage = media_tracker.sbc_storage_count;
uint8_t num_frames = bytes_in_storage / num_bytes_in_frame;
a2dp_source_stream_send_media_payload(media_tracker.a2dp_cid, media_tracker.local_seid, media_tracker.sbc_storage, bytes_in_storage, num_frames, 0);
media_tracker.sbc_storage_count = 0;
media_tracker.sbc_ready_to_send = 0;
}
static void produce_sine_audio(int16_t * pcm_buffer, int num_samples_to_write){
int count;
for (count = 0; count < num_samples_to_write ; count++){
pcm_buffer[count * 2] = sine_int16[sine_phase];
pcm_buffer[count * 2 + 1] = sine_int16[sine_phase];
sine_phase++;
if (sine_phase >= TABLE_SIZE_441HZ){
sine_phase -= TABLE_SIZE_441HZ;
}
}
}
static void produce_mod_audio(int16_t * pcm_buffer, int num_samples_to_write){
hxcmod_fillbuffer(&mod_context, (unsigned short *) &pcm_buffer[0], num_samples_to_write, &trkbuf);
}
static void produce_audio(int16_t * pcm_buffer, int num_samples){
switch (data_source){
case STREAM_SINE:
produce_sine_audio(pcm_buffer, num_samples);
break;
case STREAM_MOD:
produce_mod_audio(pcm_buffer, num_samples);
break;
default:
break;
}
#ifdef VOLUME_REDUCTION
int i;
for (i=0;i<num_samples*2;i++){
if (pcm_buffer[i] > 0){
pcm_buffer[i] = pcm_buffer[i] >> VOLUME_REDUCTION;
} else {
pcm_buffer[i] = -((-pcm_buffer[i]) >> VOLUME_REDUCTION);
}
}
#endif
}
static int a2dp_demo_fill_sbc_audio_buffer(a2dp_media_sending_context_t * context){
// perform sbc encodin
int total_num_bytes_read = 0;
unsigned int num_audio_samples_per_sbc_buffer = btstack_sbc_encoder_num_audio_frames();
while (context->samples_ready >= num_audio_samples_per_sbc_buffer
&& (context->max_media_payload_size - context->sbc_storage_count) >= btstack_sbc_encoder_sbc_buffer_length()){
int16_t pcm_frame[256*NUM_CHANNELS];
produce_audio(pcm_frame, num_audio_samples_per_sbc_buffer);
btstack_sbc_encoder_process_data(pcm_frame);
uint16_t sbc_frame_size = btstack_sbc_encoder_sbc_buffer_length();
uint8_t * sbc_frame = btstack_sbc_encoder_sbc_buffer();
total_num_bytes_read += num_audio_samples_per_sbc_buffer;
memcpy(&context->sbc_storage[context->sbc_storage_count], sbc_frame, sbc_frame_size);
context->sbc_storage_count += sbc_frame_size;
context->samples_ready -= num_audio_samples_per_sbc_buffer;
}
return total_num_bytes_read;
}
static void a2dp_demo_audio_timeout_handler(btstack_timer_source_t * timer){
a2dp_media_sending_context_t * context = (a2dp_media_sending_context_t *) btstack_run_loop_get_timer_context(timer);
btstack_run_loop_set_timer(&context->audio_timer, AUDIO_TIMEOUT_MS);
btstack_run_loop_add_timer(&context->audio_timer);
uint32_t now = btstack_run_loop_get_time_ms();
uint32_t update_period_ms = AUDIO_TIMEOUT_MS;
if (context->time_audio_data_sent > 0){
update_period_ms = now - context->time_audio_data_sent;
}
uint32_t num_samples = (update_period_ms * A2DP_SAMPLE_RATE) / 1000;
context->acc_num_missed_samples += (update_period_ms * A2DP_SAMPLE_RATE) % 1000;
while (context->acc_num_missed_samples >= 1000){
num_samples++;
context->acc_num_missed_samples -= 1000;
}
context->time_audio_data_sent = now;
context->samples_ready += num_samples;
if (context->sbc_ready_to_send) return;
a2dp_demo_fill_sbc_audio_buffer(context);
if ((context->sbc_storage_count + btstack_sbc_encoder_sbc_buffer_length()) > context->max_media_payload_size){
// schedule sending
context->sbc_ready_to_send = 1;
a2dp_source_stream_endpoint_request_can_send_now(context->a2dp_cid, context->local_seid);
}
}
static void a2dp_demo_timer_start(a2dp_media_sending_context_t * context){
context->max_media_payload_size = btstack_min(a2dp_max_media_payload_size(context->a2dp_cid, context->local_seid), SBC_STORAGE_SIZE);
context->sbc_storage_count = 0;
context->sbc_ready_to_send = 0;
context->streaming = 1;
btstack_run_loop_remove_timer(&context->audio_timer);
btstack_run_loop_set_timer_handler(&context->audio_timer, a2dp_demo_audio_timeout_handler);
btstack_run_loop_set_timer_context(&context->audio_timer, context);
btstack_run_loop_set_timer(&context->audio_timer, AUDIO_TIMEOUT_MS);
btstack_run_loop_add_timer(&context->audio_timer);
}
static void a2dp_demo_timer_stop(a2dp_media_sending_context_t * context){
context->time_audio_data_sent = 0;
context->acc_num_missed_samples = 0;
context->samples_ready = 0;
context->streaming = 1;
context->sbc_storage_count = 0;
context->sbc_ready_to_send = 0;
btstack_run_loop_remove_timer(&context->audio_timer);
}
static void a2dp_source_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
UNUSED(size);
uint8_t status;
uint8_t local_seid;
bd_addr_t address;
uint16_t cid;
if (packet_type != HCI_EVENT_PACKET) return;
#ifndef HAVE_BTSTACK_STDIN
if (hci_event_packet_get_type(packet) == BTSTACK_EVENT_STATE){
if (btstack_event_state_get_state(packet) != HCI_STATE_WORKING) return;
printf("Create A2DP Source connection to addr %s.\n", bd_addr_to_str(device_addr));
status = a2dp_source_establish_stream(device_addr, media_tracker.local_seid, &media_tracker.a2dp_cid);
if (status != ERROR_CODE_SUCCESS){
printf("Could not perform command, status 0x%2x\n", status);
}
return;
}
#endif
if (hci_event_packet_get_type(packet) == HCI_EVENT_PIN_CODE_REQUEST) {
printf("Pin code request - using '0000'\n");
hci_event_pin_code_request_get_bd_addr(packet, address);
gap_pin_code_response(address, "0000");
return;
}
if (hci_event_packet_get_type(packet) != HCI_EVENT_A2DP_META) return;
switch (hci_event_a2dp_meta_get_subevent_code(packet)){
case A2DP_SUBEVENT_SIGNALING_CONNECTION_ESTABLISHED:
a2dp_subevent_signaling_connection_established_get_bd_addr(packet, address);
cid = a2dp_subevent_signaling_connection_established_get_a2dp_cid(packet);
status = a2dp_subevent_signaling_connection_established_get_status(packet);
if (status != ERROR_CODE_SUCCESS){
printf("A2DP Source: Connection failed, status 0x%02x, cid 0x%02x, a2dp_cid 0x%02x \n", status, cid, media_tracker.a2dp_cid);
media_tracker.a2dp_cid = 0;
break;
}
media_tracker.a2dp_cid = cid;
printf("A2DP Source: Connected to address %s, a2dp cid 0x%02x.\n", bd_addr_to_str(address), media_tracker.a2dp_cid);
break;
case A2DP_SUBEVENT_SIGNALING_MEDIA_CODEC_SBC_CONFIGURATION:{
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.channel_mode = a2dp_subevent_signaling_media_codec_sbc_configuration_get_channel_mode(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.allocation_method = a2dp_subevent_signaling_media_codec_sbc_configuration_get_allocation_method(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);
sbc_configuration.frames_per_buffer = sbc_configuration.subbands * sbc_configuration.block_length;
printf("A2DP Source: Received SBC codec configuration, sampling frequency %u.\n", sbc_configuration.sampling_frequency);
btstack_sbc_encoder_init(&sbc_encoder_state, SBC_MODE_STANDARD,
sbc_configuration.block_length, sbc_configuration.subbands,
sbc_configuration.allocation_method, sbc_configuration.sampling_frequency,
sbc_configuration.max_bitpool_value,
sbc_configuration.channel_mode);
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){
printf("A2DP Source: Stream failed, status 0x%02x.\n", status);
break;
}
local_seid = a2dp_subevent_stream_established_get_local_seid(packet);
if (local_seid != media_tracker.local_seid){
printf("A2DP Source: Stream failed, wrong local seid %d, expected %d.\n", local_seid, media_tracker.local_seid);
break;
}
printf("A2DP Source: Stream established, address %s, a2dp cid 0x%02x, local seid %d, remote seid %d.\n", bd_addr_to_str(address),
media_tracker.a2dp_cid, media_tracker.local_seid, a2dp_subevent_stream_established_get_remote_seid(packet));
media_tracker.stream_opened = 1;
data_source = STREAM_MOD;
status = a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid);
break;
case A2DP_SUBEVENT_STREAM_RECONFIGURED:
status = a2dp_subevent_stream_reconfigured_get_status(packet);
printf("A2DP Source: Reconfigured, status 0x%02x\n", status);
break;
case A2DP_SUBEVENT_STREAM_STARTED:
play_info.status = AVRCP_PLAYBACK_STATUS_PLAYING;
if (media_tracker.avrcp_cid){
avrcp_target_set_now_playing_info(media_tracker.avrcp_cid, &tracks[data_source], sizeof(tracks)/sizeof(avrcp_track_t));
avrcp_target_set_playback_status(media_tracker.avrcp_cid, AVRCP_PLAYBACK_STATUS_PLAYING);
}
a2dp_demo_timer_start(&media_tracker);
printf("A2DP Source: Stream started.\n");
break;
case A2DP_SUBEVENT_STREAMING_CAN_SEND_MEDIA_PACKET_NOW:
a2dp_demo_send_media_packet();
break;
case A2DP_SUBEVENT_STREAM_SUSPENDED:
play_info.status = AVRCP_PLAYBACK_STATUS_PAUSED;
if (media_tracker.avrcp_cid){
avrcp_target_set_playback_status(media_tracker.avrcp_cid, AVRCP_PLAYBACK_STATUS_PAUSED);
}
printf("A2DP Source: Stream paused.\n");
a2dp_demo_timer_stop(&media_tracker);
break;
case A2DP_SUBEVENT_STREAM_RELEASED:
play_info.status = AVRCP_PLAYBACK_STATUS_STOPPED;
cid = a2dp_subevent_stream_released_get_a2dp_cid(packet);
if (cid == media_tracker.a2dp_cid) {
media_tracker.stream_opened = 0;
printf("A2DP Source: Stream released.\n");
}
if (media_tracker.avrcp_cid){
avrcp_target_set_now_playing_info(media_tracker.avrcp_cid, NULL, sizeof(tracks)/sizeof(avrcp_track_t));
avrcp_target_set_playback_status(media_tracker.avrcp_cid, AVRCP_PLAYBACK_STATUS_STOPPED);
}
a2dp_demo_timer_stop(&media_tracker);
break;
case A2DP_SUBEVENT_SIGNALING_CONNECTION_RELEASED:
cid = a2dp_subevent_signaling_connection_released_get_a2dp_cid(packet);
if (cid == media_tracker.a2dp_cid) {
media_tracker.avrcp_cid = 0;
media_tracker.a2dp_cid = 0;
printf("A2DP Source: Signaling released.\n\n");
}
break;
default:
break;
}
}
static void avrcp_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
UNUSED(size);
bd_addr_t event_addr;
uint16_t local_cid;
uint8_t status = ERROR_CODE_SUCCESS;
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);
// if (avrcp_cid != 0 && avrcp_cid != local_cid) {
// printf("AVRCP Target: Connection failed, expected 0x%02X l2cap cid, received 0x%02X\n", avrcp_cid, local_cid);
// return;
// }
// if (avrcp_cid != local_cid) break;
status = avrcp_subevent_connection_established_get_status(packet);
if (status != ERROR_CODE_SUCCESS){
printf("AVRCP Target: Connection failed, status 0x%02x\n", status);
return;
}
media_tracker.avrcp_cid = local_cid;
avrcp_subevent_connection_established_get_bd_addr(packet, event_addr);
printf("AVRCP Target: Connected to %s, avrcp_cid 0x%02x\n", bd_addr_to_str(event_addr), local_cid);
avrcp_target_set_now_playing_info(media_tracker.avrcp_cid, NULL, sizeof(tracks)/sizeof(avrcp_track_t));
avrcp_target_set_unit_info(media_tracker.avrcp_cid, AVRCP_SUBUNIT_TYPE_AUDIO, company_id);
avrcp_target_set_subunit_info(media_tracker.avrcp_cid, AVRCP_SUBUNIT_TYPE_AUDIO, (uint8_t *)subunit_info, sizeof(subunit_info));
return;
}
case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED:
printf("AVRCP Target: new volume %d\n", avrcp_subevent_notification_volume_changed_get_absolute_volume(packet));
break;
case AVRCP_SUBEVENT_EVENT_IDS_QUERY:
status = avrcp_target_supported_events(media_tracker.avrcp_cid, events_num, events, sizeof(events));
break;
case AVRCP_SUBEVENT_COMPANY_IDS_QUERY:
status = avrcp_target_supported_companies(media_tracker.avrcp_cid, companies_num, companies, sizeof(companies));
break;
case AVRCP_SUBEVENT_PLAY_STATUS_QUERY:
status = avrcp_target_play_status(media_tracker.avrcp_cid, play_info.song_length_ms, play_info.song_position_ms, play_info.status);
break;
// case AVRCP_SUBEVENT_NOW_PLAYING_INFO_QUERY:
// status = avrcp_target_now_playing_info(avrcp_cid);
// break;
case AVRCP_SUBEVENT_OPERATION:{
avrcp_operation_id_t operation_id = avrcp_subevent_operation_get_operation_id(packet);
switch (operation_id){
case AVRCP_OPERATION_ID_PLAY:
printf("AVRCP Target: PLAY\n");
status = a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid);
break;
case AVRCP_OPERATION_ID_PAUSE:
printf("AVRCP Target: PAUSE\n");
status = a2dp_source_pause_stream(media_tracker.a2dp_cid, media_tracker.local_seid);
break;
case AVRCP_OPERATION_ID_STOP:
printf("AVRCP Target: STOP\n");
status = a2dp_source_disconnect(media_tracker.a2dp_cid);
break;
default:
printf("AVRCP Target: operation 0x%2x is not handled\n", operation_id);
return;
}
break;
}
case AVRCP_SUBEVENT_CONNECTION_RELEASED:
printf("AVRCP Target: Disconnected, avrcp_cid 0x%02x\n", avrcp_subevent_connection_released_get_avrcp_cid(packet));
media_tracker.avrcp_cid = 0;
return;
default:
break;
}
if (status != ERROR_CODE_SUCCESS){
printf("Responding to event 0x%02x failed with status 0x%02x\n", packet[2], status);
}
}
static void avrcp_controller_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);
if (avrcp_controller_cid != 0 && avrcp_controller_cid != local_cid) {
printf("AVRCP Controller: Connection failed, expected 0x%02X l2cap cid, received 0x%02X\n", avrcp_controller_cid, local_cid);
return;
}
status = avrcp_subevent_connection_established_get_status(packet);
if (status != ERROR_CODE_SUCCESS){
printf("AVRCP Controller: Connection failed: status 0x%02x\n", status);
avrcp_controller_cid = 0;
return;
}
avrcp_controller_cid = local_cid;
avrcp_subevent_connection_established_get_bd_addr(packet, adress);
printf("AVRCP Controller: Channel successfully opened: %s, avrcp_controller_cid 0x%02x\n", bd_addr_to_str(adress), avrcp_controller_cid);
// automatically enable notifications
avrcp_controller_enable_notification(avrcp_controller_cid, AVRCP_NOTIFICATION_EVENT_VOLUME_CHANGED);
return;
}
case AVRCP_SUBEVENT_CONNECTION_RELEASED:
printf("AVRCP Controller: Channel released: avrcp_controller_cid 0x%02x\n", avrcp_subevent_connection_released_get_avrcp_cid(packet));
avrcp_controller_cid = 0;
return;
default:
break;
}
status = packet[5];
if (!avrcp_controller_cid) return;
// ignore INTERIM status
if (status == AVRCP_CTYPE_RESPONSE_INTERIM) return;
switch (packet[2]){
case AVRCP_SUBEVENT_NOTIFICATION_VOLUME_CHANGED:{
int volume_percentage = avrcp_subevent_notification_volume_changed_get_absolute_volume(packet) * 100 / 127;
printf("AVRCP Controller: notification absolute volume changed %d %%\n", volume_percentage);
return;
}
default:
break;
}
}
#ifdef HAVE_BTSTACK_STDIN
static void show_usage(void){
bd_addr_t iut_address;
gap_local_bd_addr(iut_address);
printf("\n--- Bluetooth A2DP Source/AVRCP Target Demo %s ---\n", bd_addr_to_str(iut_address));
printf("b - A2DP Source create connection to addr %s\n", device_addr_string);
printf("B - A2DP Source disconnect\n");
printf("c - AVRCP Target create connection to addr %s\n", device_addr_string);
printf("C - AVRCP Target disconnect\n");
printf("x - start streaming sine\n");
if (hxcmod_initialized){
printf("z - start streaming '%s'\n", mod_name);
}
printf("p - pause streaming\n");
printf("w - reconfigure stream for 44100 Hz\n");
printf("e - reconfigure stream for 48000 Hz\n");
printf("t - volume up\n");
printf("T - volume down\n");
printf("v - absolute volume of 50 percent\n");
printf("\n--- Bluetooth AVRCP Target Commands %s ---\n", bd_addr_to_str(iut_address));
printf("---\n");
}
static void stdin_process(char cmd){
uint8_t status = ERROR_CODE_SUCCESS;
switch (cmd){
case 'b':
status = a2dp_source_establish_stream(device_addr, media_tracker.local_seid, &media_tracker.a2dp_cid);
printf("%c - Create A2DP Source connection to addr %s, cid 0x%02x.\n", cmd, bd_addr_to_str(device_addr), media_tracker.a2dp_cid);
break;
case 'B':
printf("%c - A2DP Source Disconnect from cid 0x%2x\n", cmd, media_tracker.a2dp_cid);
status = a2dp_source_disconnect(media_tracker.a2dp_cid);
break;
case 'c':
printf("%c - Create AVRCP Target connection to addr %s.\n", cmd, bd_addr_to_str(device_addr));
status = avrcp_target_connect(device_addr, &media_tracker.avrcp_cid);
break;
case 'C':
printf("%c - AVRCP Target disconnect\n", cmd);
status = avrcp_target_disconnect(media_tracker.avrcp_cid);
break;
case '\n':
case '\r':
break;
case 't':
printf(" - volume up\n");
status = avrcp_controller_volume_up(avrcp_controller_cid);
break;
case 'T':
printf(" - volume down\n");
status = avrcp_controller_volume_down(avrcp_controller_cid);
break;
case 'v':
printf(" - absolute volume of 50%% (64)\n");
status = avrcp_controller_set_absolute_volume(avrcp_controller_cid, 64);
break;
case 'x':
if (media_tracker.avrcp_cid){
avrcp_target_set_now_playing_info(media_tracker.avrcp_cid, &tracks[data_source], sizeof(tracks)/sizeof(avrcp_track_t));
}
printf("%c - Play sine.\n", cmd);
data_source = STREAM_SINE;
if (!media_tracker.stream_opened) break;
status = a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid);
break;
case 'z':
if (media_tracker.avrcp_cid){
avrcp_target_set_now_playing_info(media_tracker.avrcp_cid, &tracks[data_source], sizeof(tracks)/sizeof(avrcp_track_t));
}
printf("%c - Play mod.\n", cmd);
data_source = STREAM_MOD;
if (!media_tracker.stream_opened) break;
status = a2dp_source_start_stream(media_tracker.a2dp_cid, media_tracker.local_seid);
break;
case 'p':
if (!media_tracker.stream_opened) break;
printf("%c - Pause stream.\n", cmd);
status = a2dp_source_pause_stream(media_tracker.a2dp_cid, media_tracker.local_seid);
break;
case 'w':
if (!media_tracker.stream_opened) break;
if (play_info.status == AVRCP_PLAYBACK_STATUS_PLAYING){
printf("Stream cannot be reconfigured while playing, please pause stream first\n");
break;
}
printf("%c - Reconfigure for 44100 Hz.\n", cmd);
status = a2dp_source_reconfigure_stream_sampling_frequency(media_tracker.a2dp_cid, 44100);
break;
case 'e':
if (!media_tracker.stream_opened) break;
if (play_info.status == AVRCP_PLAYBACK_STATUS_PLAYING){
printf("Stream cannot be reconfigured while playing, please pause stream first\n");
break;
}
printf("%c - Reconfigure for 48000 Hz.\n", cmd);
status = a2dp_source_reconfigure_stream_sampling_frequency(media_tracker.a2dp_cid, 48000);
break;
default:
show_usage();
return;
}
if (status != ERROR_CODE_SUCCESS){
printf("Could not perform command \'%c\', status 0x%2x\n", cmd, status);
}
}
#endif
int btstack_main(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){
(void)argc;
(void)argv;
int err = a2dp_source_and_avrcp_services_init();
if (err) return err;
// turn on!
hci_power_control(HCI_POWER_ON);
return 0;
}
/* EXAMPLE_END */
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