/*
* Copyright (C) 2014 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
*
*/
// *****************************************************************************
//
// Minimal test for HSP Headset (!! UNDER DEVELOPMENT !!)
//
// Requires HAVE_SCO and HAVE_SCO_OVER_HCI to be defined
//
// Tested working setups:
// - Ubuntu 14 64-bit, CC2564B connected via FTDI USB-2-UART adapter, 921600 baud
//
// Non working setups:
// - OS X 10.11, CC2564B connected via FDTI USB-2-UART adapter, 921600 baud
// - select(..) blocks > 400 ms -> num completed is received to late -> gaps between audio
// - looks like bug in select->FTDI driver as it works correct on Linux
// - OS X 10.11, USB Bluetooth Dongles...
// *****************************************************************************
#include "btstack-config.h"
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <btstack/hci_cmds.h>
#include <btstack/run_loop.h>
#include <btstack/sdp_util.h>
#include "sdp.h"
#include "hsp_hs.h"
#include "hci.h"
#include "l2cap.h"
#include "debug.h"
static uint32_t hsp_service_buffer[150/4]; // implicit alignment to 4-byte memory address
static const uint8_t rfcomm_channel_nr = 1;
static const char hsp_hs_service_name[] = "Headset Test";
static uint16_t sco_handle = 0;
static char hs_cmd_buffer[100];
static int phase = 0;
// input signal: pre-computed sine wave, 160 Hz
static const uint8_t sine[] = {
0, 15, 31, 46, 61, 74, 86, 97, 107, 114,
120, 124, 126, 126, 124, 120, 114, 107, 97, 86,
74, 61, 46, 31, 15, 0, 241, 225, 210, 195,
182, 170, 159, 149, 142, 136, 132, 130, 130, 132,
136, 142, 149, 159, 170, 182, 195, 210, 225, 241,
};
#if 0
//
// re-compute sine table for input signal
//
#include <math.h>
#define TABLE_SIZE 50
static uint8_t sine[TABLE_SIZE];
static void compute_signal(void){
#define TABLE_SIZE (50)
// create sine wave table
int i;
printf("static const uint8_t sine[] = {");
for( i=0; i<TABLE_SIZE; i++ ) {
if ((i % 10) == 0) printf("\n ");
sine[i] = (int8_t) (127.0 * sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ));
printf("%3u, ", sine[i]);
}
printf("\n};\n");
}
#endif
static void try_send_sco(void){
if (!sco_handle) return;
if (!hci_can_send_sco_packet_now(sco_handle)) {
// printf("try_send_sco, cannot send now\n");
return;
}
const int frames_per_packet = 180;
hci_reserve_packet_buffer();
uint8_t * sco_packet = hci_get_outgoing_packet_buffer();
// set handle + flags
bt_store_16(sco_packet, 0, sco_handle);
// set len
sco_packet[2] = frames_per_packet;
int i;
for (i=0;i<frames_per_packet;i++){
sco_packet[3+i] = sine[phase];
phase++;
if (phase >= sizeof(sine)) phase = 0;
}
hci_send_sco_packet_buffer(3 + frames_per_packet);
static int count = 0;
count++;
if ((count & 15) == 0) printf("Sent %u\n", count);
}
static void sco_packet_handler(uint8_t packet_type, uint8_t * packet, uint16_t size){
static int count = 0;
count++;
if ((count & 15)) return;
printf("SCO packets %u\n", count);
// hexdumpf(packet, size);
}
static void packet_handler(uint8_t * event, uint16_t event_size){
// printf("Packet handler event 0x%02x\n", event[0]);
try_send_sco();
switch (event[0]) {
case BTSTACK_EVENT_STATE:
if (event[2] != HCI_STATE_WORKING) break;
printf("Working!\n");
break;
case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:
// printf("HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS\n");
// try_send_sco();
break;
case DAEMON_EVENT_HCI_PACKET_SENT:
// printf("DAEMON_EVENT_HCI_PACKET_SENT\n");
// try_send_sco();
break;
case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:
// printf("HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE status %u, %x\n", event[2], READ_BT_16(event, 3));
if (event[2]) break;
sco_handle = READ_BT_16(event, 3);
break;
case HCI_EVENT_HSP_META:
switch (event[2]) {
case HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE:
if (event[3] == 0){
printf("Audio connection established with SCO handle 0x%04x.\n", sco_handle);
// try_send_sco();
} else {
printf("Audio connection establishment failed with status %u\n", event[3]);
}
break;
case HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE:
if (event[3] == 0){
printf("Audio connection released.\n\n");
sco_handle = 0;
} else {
printf("Audio connection releasing failed with status %u\n", event[3]);
}
break;
case HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED:
printf("Received microphone gain change %d\n", event[3]);
break;
case HSP_SUBEVENT_SPEAKER_GAIN_CHANGED:
printf("Received speaker gain change %d\n", event[3]);
break;
case HSP_SUBEVENT_RING:
printf("HS: RING RING!\n");
break;
case HSP_SUBEVENT_AG_INDICATION:
memset(hs_cmd_buffer, 0, sizeof(hs_cmd_buffer));
int size = event_size <= sizeof(hs_cmd_buffer)? event_size : sizeof(hs_cmd_buffer);
memcpy(hs_cmd_buffer, &event[3], size - 1);
printf("Received custom indication: \"%s\". \nExit code or call hsp_hs_send_result.\n", hs_cmd_buffer);
break;
default:
printf("event not handled %u\n", event[2]);
break;
}
break;
default:
break;
}
}
int btstack_main(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){
#ifdef TABLE_SIZE
compute_signal();
#endif
hci_register_sco_packet_handler(&sco_packet_handler);
hci_discoverable_control(1);
hci_ssp_set_io_capability(SSP_IO_CAPABILITY_DISPLAY_YES_NO);
gap_set_local_name("BTstack HSP HS");
hsp_hs_init(rfcomm_channel_nr);
hsp_hs_register_packet_handler(packet_handler);
sdp_init();
memset((uint8_t *)hsp_service_buffer, 0, sizeof(hsp_service_buffer));
hsp_hs_create_service((uint8_t *)hsp_service_buffer, rfcomm_channel_nr, hsp_hs_service_name, 0);
sdp_register_service_internal(NULL, (uint8_t *)hsp_service_buffer);
// turn on!
hci_power_control(HCI_POWER_ON);
return 0;
}