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btstack/test/le_audio/le_audio_unicast_gateway.c
Matthias Ringwald 14036cc8ea test/le-audio: fix modplayer / sine toggle
2023-10-14 17:32:43 +02:00

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/*
* Copyright (C) 2022 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__ "le_audio_unicast_source.c"
/*
* LE Audio Unicast Source
* Until GATT Services are available, we encode LC3 config in advertising
*/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <btstack_debug.h>
#include "bluetooth_data_types.h"
#include "bluetooth_company_id.h"
#include "btstack_stdin.h"
#include "btstack_event.h"
#include "gap.h"
#include "hci.h"
#include "btstack_lc3.h"
#include "btstack_lc3_google.h"
#include "le_audio_demo_util_source.h"
#include "le_audio_demo_util_sink.h"
// max config
#define MAX_CHANNELS 2
#define MAX_NUM_CIS 1
static uint8_t adv_data[] = {
// Manufacturer Specific Data to indicate codec
9,
BLUETOOTH_DATA_TYPE_MANUFACTURER_SPECIFIC_DATA,
BLUETOOTH_COMPANY_ID_BLUEKITCHEN_GMBH & 0xff,
BLUETOOTH_COMPANY_ID_BLUEKITCHEN_GMBH >> 8,
0, // subtype: LE Audio Connection Source
0, // flags
1, // num bis
8, // sampling frequency in khz
0, // frame duration
26, // octets per frame
// name
7, BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME, 'S', 'o', 'u', 'r', 'c', 'e'
};
static bd_addr_t remote;
static btstack_packet_callback_registration_t hci_event_callback_registration;
static unsigned int next_cis_index;
static hci_con_handle_t cis_con_handles[MAX_NUM_CIS];
static bool cis_established[MAX_NUM_CIS];
static uint8_t iso_frame_counter;
static uint8_t num_cis;
// time stamping
#ifdef COUNT_MODE
#define MAX_PACKET_INTERVAL_BINS_MS 50
static uint32_t send_time_bins[MAX_PACKET_INTERVAL_BINS_MS];
static uint32_t send_last_ms;
#endif
// lc3 codec config
static uint32_t sampling_frequency_hz;
static btstack_lc3_frame_duration_t frame_duration;
static uint16_t number_samples_per_frame;
static uint16_t octets_per_frame;
static uint8_t num_channels = 1;
// codec menu
static uint8_t menu_sampling_frequency;
static uint8_t menu_variant;
// audio producer
static le_audio_demo_source_generator audio_source = AUDIO_SOURCE_MODPLAYER;
static enum {
APP_W4_WORKING,
APP_IDLE,
APP_W4_CIS_COMPLETE,
APP_STREAMING,
} app_state = APP_W4_WORKING;
// enumerate default codec configs
static struct {
uint16_t samplingrate_hz;
uint8_t samplingrate_index;
uint8_t num_variants;
struct {
const char * name;
btstack_lc3_frame_duration_t frame_duration;
uint16_t octets_per_frame;
} variants[6];
} codec_configurations[] = {
{
8000, 0x01, 2,
{
{ "8_1", BTSTACK_LC3_FRAME_DURATION_7500US, 26},
{ "8_2", BTSTACK_LC3_FRAME_DURATION_10000US, 30}
}
},
{
16000, 0x03, 2,
{
{ "16_1", BTSTACK_LC3_FRAME_DURATION_7500US, 30},
{ "16_2", BTSTACK_LC3_FRAME_DURATION_10000US, 40}
}
},
{
24000, 0x05, 2,
{
{ "24_1", BTSTACK_LC3_FRAME_DURATION_7500US, 45},
{ "24_2", BTSTACK_LC3_FRAME_DURATION_10000US, 60}
}
},
{
32000, 0x06, 2,
{
{ "32_1", BTSTACK_LC3_FRAME_DURATION_7500US, 60},
{ "32_2", BTSTACK_LC3_FRAME_DURATION_10000US, 80}
}
},
{
44100, 0x07, 2,
{
{ "441_1", BTSTACK_LC3_FRAME_DURATION_7500US, 97},
{ "441_2", BTSTACK_LC3_FRAME_DURATION_10000US, 130}
}
},
{
48000, 0x08, 6,
{
{ "48_1", BTSTACK_LC3_FRAME_DURATION_7500US, 75},
{ "48_2", BTSTACK_LC3_FRAME_DURATION_10000US, 100},
{ "48_3", BTSTACK_LC3_FRAME_DURATION_7500US, 90},
{ "48_4", BTSTACK_LC3_FRAME_DURATION_10000US, 120},
{ "48_5", BTSTACK_LC3_FRAME_DURATION_7500US, 117},
{ "48_6", BTSTACK_LC3_FRAME_DURATION_10000US, 155}
}
},
};
static void show_usage(void);
static void print_config(void) {
printf("Config '%s_%u': %u, %s ms, %u octets - %s\n",
codec_configurations[menu_sampling_frequency].variants[menu_variant].name,
num_channels,
codec_configurations[menu_sampling_frequency].samplingrate_hz,
codec_configurations[menu_sampling_frequency].variants[menu_variant].frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? "7.5" : "10",
codec_configurations[menu_sampling_frequency].variants[menu_variant].octets_per_frame,
audio_source == AUDIO_SOURCE_SINE ? "Sine" : "Modplayer");
}
static void start_unicast() {
// use values from table
sampling_frequency_hz = codec_configurations[menu_sampling_frequency].samplingrate_hz;
octets_per_frame = codec_configurations[menu_sampling_frequency].variants[menu_variant].octets_per_frame;
frame_duration = codec_configurations[menu_sampling_frequency].variants[menu_variant].frame_duration;
le_audio_demo_util_source_configure(1, num_channels, sampling_frequency_hz, frame_duration, octets_per_frame);
le_audio_demo_util_source_generate_iso_frame(audio_source);
// update adv / BASE
adv_data[4] = 0; // subtype
adv_data[5] = 0; // flags
adv_data[6] = num_channels;
adv_data[7] = sampling_frequency_hz / 1000;
adv_data[8] = frame_duration == BTSTACK_LC3_FRAME_DURATION_7500US ? 0 : 1;
adv_data[9] = octets_per_frame;
// setup advertisements
uint16_t adv_int_min = 0x0030;
uint16_t adv_int_max = 0x0030;
uint8_t adv_type = 0;
bd_addr_t null_addr;
memset(null_addr, 0, 6);
gap_advertisements_set_params(adv_int_min, adv_int_max, adv_type, 0, null_addr, 0x07, 0x00);
gap_advertisements_set_data(sizeof(adv_data), adv_data);
gap_advertisements_enable(1);
num_cis = 1;
app_state = APP_W4_CIS_COMPLETE;
}
static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
if (packet_type != HCI_EVENT_PACKET) return;
hci_con_handle_t cis_con_handle;
uint8_t i;
switch (packet[0]) {
case BTSTACK_EVENT_STATE:
switch(btstack_event_state_get_state(packet)) {
case HCI_STATE_WORKING:
app_state = APP_IDLE;
#ifdef ENABLE_DEMO_MODE
// start unicast automatically, mod player, 48_5_2
num_channels = 2;
menu_sampling_frequency = 5;
menu_variant = 4;
start_unicast();
#else
show_usage();
printf("Please select sample frequency and variation, then start advertising\n");
#endif
break;
case HCI_STATE_OFF:
printf("Goodbye\n");
exit(0);
break;
default:
break;
}
break;
case HCI_EVENT_DISCONNECTION_COMPLETE:
cis_con_handle = hci_event_disconnection_complete_get_connection_handle(packet);
for (i=0; i < num_cis; i++){
if (cis_con_handle == cis_con_handles[i]){
le_audio_demo_util_sink_close();
}
}
break;
case HCI_EVENT_LE_META:
switch(hci_event_le_meta_get_subevent_code(packet)){
case HCI_SUBEVENT_LE_CONNECTION_COMPLETE:
next_cis_index = 0;
break;
case HCI_SUBEVENT_LE_CIS_REQUEST:
cis_con_handles[next_cis_index] = hci_subevent_le_cis_request_get_cis_connection_handle(packet);
gap_cis_accept(cis_con_handles[next_cis_index]);
next_cis_index++;
break;
default:
break;
}
break;
case HCI_EVENT_META_GAP:
switch (hci_event_gap_meta_get_subevent_code(packet)) {
case GAP_SUBEVENT_CIS_CREATED: {
cis_con_handle = gap_subevent_cis_created_get_cis_con_handle(packet);
for (i=0; i < num_cis; i++){
if (cis_con_handle == cis_con_handles[i]){
cis_established[i] = true;
}
}
// check for complete
bool complete = true;
for (i=0; i < num_cis; i++) {
complete &= cis_established[i];
}
// ready to send
if (complete) {
printf("All CIS Established and ISO Path setup\n");
// init sink
uint16_t iso_interval_1250us = gap_subevent_cis_created_get_iso_interval_1250us(packet);
uint8_t flush_timeout = gap_subevent_cis_created_get_flush_timeout_c_to_p(packet);
le_audio_demo_util_sink_configure_unicast(1, 1, sampling_frequency_hz, frame_duration,
octets_per_frame,
iso_interval_1250us, flush_timeout);
next_cis_index = 0;
app_state = APP_STREAMING;
hci_request_cis_can_send_now_events(cis_con_handles[0]);
}
break;
}
}
break;
case HCI_EVENT_CIS_CAN_SEND_NOW:
cis_con_handle = hci_event_cis_can_send_now_get_cis_con_handle(packet);
for (i=0;i<num_cis;i++){
if (cis_con_handle == cis_con_handles[i]){
// allow to send
le_audio_demo_util_source_send(i, cis_con_handle);
le_audio_demo_util_source_generate_iso_frame(audio_source);
hci_request_cis_can_send_now_events(cis_con_handle);
}
}
break;
default:
break;
}
}
static void iso_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size) {
le_audio_demo_util_sink_receive(0, packet, size);
}
static void show_usage(void){
printf("\n--- LE Audio Unicast Source Test Console ---\n");
print_config();
printf("---\n");
printf("c - toggle channels\n");
printf("f - next sampling frequency\n");
printf("v - next codec variant\n");
printf("t - toggle sine / modplayer\n");
printf("s - start advertising\n");
printf("x - shutdown\n");
printf("---\n");
}
static void stdin_process(char c){
switch (c){
case 'c':
if (app_state != APP_IDLE){
printf("Codec configuration can only be changed in idle state\n");
break;
}
num_channels = 3 - num_channels;
print_config();
break;
case 'f':
if (app_state != APP_IDLE){
printf("Codec configuration can only be changed in idle state\n");
break;
}
menu_sampling_frequency++;
if (menu_sampling_frequency >= 6){
menu_sampling_frequency = 0;
}
if (menu_variant >= codec_configurations[menu_sampling_frequency].num_variants){
menu_variant = 0;
}
print_config();
break;
case 'v':
if (app_state != APP_IDLE){
printf("Codec configuration can only be changed in idle state\n");
break;
}
menu_variant++;
if (menu_variant >= codec_configurations[menu_sampling_frequency].num_variants){
menu_variant = 0;
}
print_config();
break;
case 's':
if (app_state != APP_IDLE){
printf("Cannot start advertising - not in idle state\n");
break;
}
start_unicast();
break;
case 't':
switch (audio_source){
case AUDIO_SOURCE_MODPLAYER:
audio_source = AUDIO_SOURCE_SINE;
break;
case AUDIO_SOURCE_SINE:
audio_source = AUDIO_SOURCE_MODPLAYER;
break;
default:
btstack_unreachable();
break;
}
print_config();
break;
case '\n':
case '\r':
break;
default:
show_usage();
break;
}
}
int btstack_main(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){
(void) argv;
(void) argc;
// register for HCI events
hci_event_callback_registration.callback = &packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
// register for ISO Packet
hci_register_iso_packet_handler(&iso_packet_handler);
// setup audio processing
le_audio_demo_util_sink_init("le_audio_unicast_source.wav");
le_audio_demo_util_source_init();
// turn on!
hci_power_control(HCI_POWER_ON);
btstack_stdin_setup(stdin_process);
return 0;
}
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