static int iguana_init()
{
int recv_pipe[2], retval = 0;
init_rec_buffer();
if (pipe(recv_pipe) != 0)
{
logprintf(LOG_ERR, "couldn't open pipe: %s", strerror(errno));
}
else
{
int notify[2];
if (pipe(notify) != 0)
{
logprintf(LOG_ERR, "couldn't open pipe: %s", strerror(errno));
close(recv_pipe[0]);
close(recv_pipe[1]);
}
else
{
hw.fd = recv_pipe[0];
child = fork();
if (child == -1)
{
logprintf(LOG_ERR, "couldn't fork child process: %s", strerror(errno));
}
else if (child == 0)
{
close(recv_pipe[0]);
close(notify[0]);
recv_loop(recv_pipe[1], notify[1]);
_exit(0);
}
else
{
int dummy;
close(recv_pipe[1]);
close(notify[1]);
/* make sure child has set its signal handler to avoid race with iguana_deinit() */
read(notify[0], &dummy, 1);
close(notify[0]);
sendConn = iguanaConnect(hw.device);
if (sendConn == -1)
logprintf(LOG_ERR, "couldn't open connection to iguanaIR daemon: %s", strerror(errno));
else
retval = 1;
}
}
}
return retval;
}
/* initialize driver -- returns 1 on success, 0 on error */
static int dfc_init()
{
struct usb_device *usb_dev;
int pipe_fd[2] = { -1, -1 };
LOGPRINTF(1, "initializing USB receiver");
init_rec_buffer();
usb_dev = find_usb_device();
if (usb_dev == NULL) {
logprintf(LOG_ERR, "couldn't find a compatible USB device");
return 0;
}
/* A separate process will be forked to read data from the USB
* receiver and write it to a pipe. hw.fd is set to the readable
* end of this pipe. */
if (pipe(pipe_fd) != 0) {
logperror(LOG_ERR, "couldn't open pipe");
return 0;
}
hw.fd = pipe_fd[0];
dev_handle = usb_open(usb_dev);
if (dev_handle == NULL) {
logperror(LOG_ERR, "couldn't open USB receiver");
goto fail;
}
child = fork();
if (child == -1) {
logperror(LOG_ERR, "couldn't fork child process");
goto fail;
} else if (child == 0) {
usb_read_loop(pipe_fd[1]);
}
LOGPRINTF(1, "USB receiver initialized");
return 1;
fail:
if (dev_handle) {
usb_close(dev_handle);
dev_handle = NULL;
}
if (pipe_fd[0] >= 0)
close(pipe_fd[0]);
if (pipe_fd[1] >= 0)
close(pipe_fd[1]);
return 0;
}
WL_API int init(HANDLE exitEvent) {
init_rec_buffer();
initHardwareStruct();
threadExitEvent = exitEvent;
dataReadyEvent = CreateEvent(nullptr,TRUE,FALSE,nullptr);
sendReceiveData = new SendReceiveData();
if(!sendReceiveData->init()) return 0;
return 1;
}
WL_API int init(HANDLE exitEvent) {
init_rec_buffer();
init_send_buffer();
initHardwareStruct();
threadExitEvent = exitEvent;
dataReadyEvent = CreateEvent(NULL,TRUE,FALSE,NULL);
sendReceiveData = new SendReceiveData();
if(!sendReceiveData->init()) return 0;
if(!sendReceiveData->setTransmitters(settings.getTransmitterChannels())) return 0;
return 1;
}
int udp_init()
{
int port;
struct sockaddr_in addr;
logprintf(LIRC_INFO, "Initializing UDP: %s", drv.device);
init_rec_buffer();
port = atoi(drv.device);
if (port == 0) {
logprintf(LIRC_ERROR, "invalid port: %s", drv.device);
return 0;
}
/* drv.fd needs to point somewhere when we have extra data */
if ((zerofd = open("/dev/zero", O_RDONLY)) < 0) {
logprintf(LIRC_ERROR, "can't open /dev/zero: %s", strerror(errno));
return 0;
}
if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
logprintf(LIRC_ERROR, "error creating socket: %s", strerror(errno));
close(zerofd);
return 0;
}
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = htonl(INADDR_ANY);
addr.sin_port = htons(port);
if (bind(sockfd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
logprintf(LIRC_ERROR, "can't bind socket to port %d: %s", port, strerror(errno));
close(sockfd);
close(zerofd);
return 0;
}
logprintf(LIRC_INFO, "Listening on port %d/udp", port);
drv.fd = sockfd;
return (1);
}
int iguana_init()
{
int recv_pipe[2], retval = 0;
init_rec_buffer();
if (pipe(recv_pipe) != 0)
{
logprintf(LOG_ERR, "couldn't open pipe: %s", strerror(errno));
}
else
{
hw.fd = recv_pipe[0];
child = fork();
if (child == -1)
{
logprintf(LOG_ERR, "couldn't fork child process: %s", strerror(errno));
}
else if (child == 0)
{
recv_loop(recv_pipe[1]);
exit(0);
}
else
{
sendConn = iguanaConnect(hw.device);
if (sendConn == -1)
logprintf(LOG_ERR, "couldn't open connection to iguanaIR daemon: %s", strerror(errno));
else
retval = 1;
}
}
return retval;
}
int default_init()
{
struct stat s;
int i;
/* FIXME: other modules might need this, too */
init_rec_buffer();
init_send_buffer();
if (stat(drv.device, &s) == -1) {
logprintf(LIRC_ERROR, "could not get file information for %s", drv.device);
logperror(LIRC_ERROR, "default_init()");
return (0);
}
/* file could be unix socket, fifo and native lirc device */
if (S_ISSOCK(s.st_mode)) {
struct sockaddr_un addr;
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, drv.device, sizeof(addr.sun_path) - 1);
drv.fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (drv.fd == -1) {
logprintf(LIRC_ERROR, "could not create socket");
logperror(LIRC_ERROR, "default_init()");
return (0);
}
if (connect(drv.fd, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
logprintf(LIRC_ERROR, "could not connect to unix socket %s", drv.device);
logperror(LIRC_ERROR, "default_init()");
default_deinit();
close(drv.fd);
return (0);
}
LOGPRINTF(1, "using unix socket lirc device");
drv.features = LIRC_CAN_REC_MODE2 | LIRC_CAN_SEND_PULSE;
drv.rec_mode = LIRC_MODE_MODE2; /* this might change in future */
drv.send_mode = LIRC_MODE_PULSE;
return (1);
}
if ((drv.fd = open(drv.device, O_RDWR)) < 0) {
logprintf(LIRC_ERROR, "could not open %s", drv.device);
logperror(LIRC_ERROR, "default_init()");
return (0);
}
if (S_ISFIFO(s.st_mode)) {
LOGPRINTF(1, "using defaults for the Irman");
drv.features = LIRC_CAN_REC_MODE2;
drv.rec_mode = LIRC_MODE_MODE2; /* this might change in future */
return (1);
} else if (!S_ISCHR(s.st_mode)) {
default_deinit();
logprintf(LIRC_ERROR, "%s is not a character device!!!", drv.device);
logperror(LIRC_ERROR, "something went wrong during installation");
return (0);
} else if (default_ioctl(LIRC_GET_FEATURES, &drv.features) == -1) {
logprintf(LIRC_ERROR, "could not get hardware features");
logprintf(LIRC_ERROR, "this device driver does not support the LIRC ioctl interface");
if (major(s.st_rdev) == 13) {
logprintf(LIRC_ERROR, "did you mean to use the devinput driver instead of the %s driver?",
drv.name);
} else {
logprintf(LIRC_ERROR, "major number of %s is %lu", drv.device, (__u32) major(s.st_rdev));
logprintf(LIRC_ERROR, "make sure %s is a LIRC device and use a current version of the driver",
drv.device);
}
default_deinit();
return (0);
}
else {
if (!(LIRC_CAN_SEND(drv.features) || LIRC_CAN_REC(drv.features))) {
LOGPRINTF(1, "driver supports neither sending nor receiving of IR signals");
}
if (LIRC_CAN_SEND(drv.features) && LIRC_CAN_REC(drv.features)) {
LOGPRINTF(1, "driver supports both sending and receiving");
} else if (LIRC_CAN_SEND(drv.features)) {
LOGPRINTF(1, "driver supports sending");
} else if (LIRC_CAN_REC(drv.features)) {
LOGPRINTF(1, "driver supports receiving");
}
}
/* set send/receive method */
drv.send_mode = 0;
if (LIRC_CAN_SEND(drv.features)) {
for (i = 0; supported_send_modes[i] != 0; i++) {
if (LIRC_CAN_SEND(drv.features) == supported_send_modes[i]) {
drv.send_mode = LIRC_SEND2MODE(supported_send_modes[i]);
break;
}
}
if (supported_send_modes[i] == 0) {
logprintf(LIRC_NOTICE, "the send method of the driver is not yet supported by lircd");
}
}
drv.rec_mode = 0;
if (LIRC_CAN_REC(drv.features)) {
for (i = 0; supported_rec_modes[i] != 0; i++) {
if (LIRC_CAN_REC(drv.features) == supported_rec_modes[i]) {
drv.rec_mode = LIRC_REC2MODE(supported_rec_modes[i]);
break;
}
}
if (supported_rec_modes[i] == 0) {
logprintf(LIRC_NOTICE, "the receive method of the driver is not yet supported by lircd");
}
}
if (drv.rec_mode == LIRC_MODE_MODE2) {
/* get resolution */
drv.resolution = 0;
if ((drv.features & LIRC_CAN_GET_REC_RESOLUTION)
&& (default_ioctl(LIRC_GET_REC_RESOLUTION, &drv.resolution) != -1)) {
LOGPRINTF(1, "resolution of receiver: %d", drv.resolution);
}
} else if (drv.rec_mode == LIRC_MODE_LIRCCODE) {
if (default_ioctl(LIRC_GET_LENGTH,
(void*) &drv.code_length) == -1) {
logprintf(LIRC_ERROR, "could not get code length");
logperror(LIRC_ERROR, "default_init()");
default_deinit();
return (0);
}
if (drv.code_length > sizeof(ir_code) * CHAR_BIT) {
logprintf(LIRC_ERROR, "lircd can not handle %lu bit codes", drv.code_length);
default_deinit();
return (0);
}
}
if (!(drv.send_mode || drv.rec_mode)) {
default_deinit();
return (0);
}
return (1);
}
int audio_init()
{
PaStreamParameters inputParameters;
PaStreamParameters outputParameters;
PaError err;
int flags;
struct termios t;
char api[1024];
char device[1024];
double latency;
LOGPRINTF(1, "hw_audio_init()");
//
logprintf(LOG_INFO, "Initializing %s...", hw.device);
init_rec_buffer();
rewind_rec_buffer();
/* new */
data.lastFrames[0] = 128;
data.lastFrames[1] = 128;
data.lastFrames[2] = 128;
data.lastSign = 0;
data.lastCount = 0;
data.pulseSign = 0;
data.carrierPos = 0.0;
data.remainingSignal = 0.0;
data.signalPhase = 0;
data.signaledDone = 1;
data.samplesToIgnore = 0;
data.carrierFreq = DEFAULT_FREQ;
err = Pa_Initialize();
if (err != paNoError)
goto error;
audio_parsedevicestr(api, device, &data.samplerate, &latency);
logprintf(LOG_INFO, "Using samplerate %i", data.samplerate);
/* choose input device */
audio_choosedevice(&inputParameters, 1, api, device, latency);
if (inputParameters.device == paNoDevice) {
logprintf(LOG_ERR, "No input device found");
goto error;
}
inputParameters.channelCount = NUM_CHANNELS; /* stereo input */
inputParameters.sampleFormat = PA_SAMPLE_TYPE;
inputParameters.hostApiSpecificStreamInfo = NULL;
/* choose output device */
audio_choosedevice(&outputParameters, 0, api, device, latency);
if (outputParameters.device == paNoDevice) {
logprintf(LOG_ERR, "No output device found");
goto error;
}
outputParameters.channelCount = NUM_CHANNELS; /* stereo output */
outputParameters.sampleFormat = PA_SAMPLE_TYPE;
outputParameters.hostApiSpecificStreamInfo = NULL;
outputLatency = outputParameters.suggestedLatency * 1000000;
/* Record some audio. -------------------------------------------- */
err = Pa_OpenStream(&stream, &inputParameters, &outputParameters, data.samplerate, 512, /* frames per buffer */
paPrimeOutputBuffersUsingStreamCallback, recordCallback, &data);
if (err != paNoError)
goto error;
/* open pty */
if (openpty(&master, &ptyfd, ptyName, 0, 0) == -1) {
logprintf(LOG_ERR, "openpty failed");
logperror(LOG_ERR, "openpty()");
goto error;
}
/* regular device file */
if (tcgetattr(master, &t) < 0) {
logprintf(LOG_ERR, "tcgetattr failed");
logperror(LOG_ERR, "tcgetattr()");
}
cfmakeraw(&t);
/* apply file descriptor options */
if (tcsetattr(master, TCSANOW, &t) < 0) {
logprintf(LOG_ERR, "tcsetattr failed");
logperror(LOG_ERR, "tcsetattr()");
}
flags = fcntl(ptyfd, F_GETFL, 0);
if (flags != -1) {
fcntl(ptyfd, F_SETFL, flags | O_NONBLOCK);
}
LOGPRINTF(LOG_INFO, "PTY name: %s", ptyName);
hw.fd = ptyfd;
/* make a pipe for sending signals to the callback */
/* make a pipe for signaling from the callback that everything
was sent */
if (pipe(sendPipe) == -1 || pipe(completedPipe) == -1) {
logprintf(LOG_ERR, "pipe failed");
logperror(LOG_ERR, "pipe()");
}
/* make the readable end non-blocking */
flags = fcntl(sendPipe[0], F_GETFL, 0);
if (flags != -1) {
fcntl(sendPipe[0], F_SETFL, flags | O_NONBLOCK);
} else {
logprintf(LOG_ERR, "fcntl failed");
logperror(LOG_ERR, "fcntl()");
}
err = Pa_StartStream(stream);
if (err != paNoError)
goto error;
/* wait for portaudio to settle */
usleep(50000);
return (1);
error:
Pa_Terminate();
logprintf(LOG_ERR, "an error occured while using the portaudio stream");
logprintf(LOG_ERR, "error number: %d", err);
logprintf(LOG_ERR, "error message: %s", Pa_GetErrorText(err));
return (0);
}
int default_init()
{
#if defined(SIM_SEND) && !defined(DAEMONIZE)
hw.fd=STDOUT_FILENO;
hw.features=LIRC_CAN_SEND_PULSE;
hw.send_mode=LIRC_MODE_PULSE;
hw.rec_mode=0;
#elif defined(SIM_REC) && !defined(DAEMONIZE)
hw.fd=STDIN_FILENO;
hw.features=LIRC_CAN_REC_MODE2;
hw.send_mode=0;
hw.rec_mode=LIRC_MODE_MODE2;
#else
struct stat s;
int i;
/* FIXME: other modules might need this, too */
init_rec_buffer();
init_send_buffer();
if((hw.fd=open(hw.device,O_RDWR))<0)
{
logprintf(LOG_ERR,"could not open %s",hw.device);
logperror(LOG_ERR,"default_init()");
return(0);
}
if(fstat(hw.fd,&s)==-1)
{
default_deinit();
logprintf(LOG_ERR,"could not get file information");
logperror(LOG_ERR,"default_init()");
return(0);
}
if(S_ISFIFO(s.st_mode))
{
LOGPRINTF(1,"using defaults for the Irman");
hw.features=LIRC_CAN_REC_MODE2;
hw.rec_mode=LIRC_MODE_MODE2; /* this might change in future */
return(1);
}
else if(!S_ISCHR(s.st_mode))
{
default_deinit();
logprintf(LOG_ERR,"%s is not a character device!!!",
hw.device);
logperror(LOG_ERR,"something went wrong during "
"installation");
return(0);
}
else if(ioctl(hw.fd,LIRC_GET_FEATURES,&hw.features)==-1)
{
logprintf(LOG_ERR,"could not get hardware features");
logprintf(LOG_ERR,"this device driver does not "
"support the new LIRC interface");
logprintf(LOG_ERR,"make sure you use a current "
"version of the driver");
default_deinit();
return(0);
}
# ifdef DEBUG
else
{
if(!(LIRC_CAN_SEND(hw.features) ||
LIRC_CAN_REC(hw.features)))
{
LOGPRINTF(1,"driver supports neither "
"sending nor receiving of IR signals");
}
if(LIRC_CAN_SEND(hw.features) && LIRC_CAN_REC(hw.features))
{
LOGPRINTF(1,"driver supports both sending and "
"receiving");
}
else if(LIRC_CAN_SEND(hw.features))
{
LOGPRINTF(1,"driver supports sending");
}
else if(LIRC_CAN_REC(hw.features))
{
LOGPRINTF(1,"driver supports receiving");
}
}
# endif
/* set send/receive method */
hw.send_mode=0;
if(LIRC_CAN_SEND(hw.features))
{
for(i=0;supported_send_modes[i]!=0;i++)
{
if(hw.features&supported_send_modes[i])
{
unsigned long mode;
mode=LIRC_SEND2MODE(supported_send_modes[i]);
if(ioctl(hw.fd,LIRC_SET_SEND_MODE,&mode)==-1)
{
logprintf(LOG_ERR,"could not set "
"send mode");
logperror(LOG_ERR,"default_init()");
default_deinit();
return(0);
}
hw.send_mode=LIRC_SEND2MODE
(supported_send_modes[i]);
break;
}
}
if(supported_send_modes[i]==0)
{
logprintf(LOG_NOTICE,"the send method of the "
"driver is not yet supported by lircd");
}
}
hw.rec_mode=0;
if(LIRC_CAN_REC(hw.features))
{
for(i=0;supported_rec_modes[i]!=0;i++)
{
if(hw.features&supported_rec_modes[i])
{
unsigned long mode;
mode=LIRC_REC2MODE(supported_rec_modes[i]);
if(ioctl(hw.fd,LIRC_SET_REC_MODE,&mode)==-1)
{
logprintf(LOG_ERR,"could not set "
"receive mode");
logperror(LOG_ERR,"default_init()");
return(0);
}
hw.rec_mode=LIRC_REC2MODE
(supported_rec_modes[i]);
break;
}
}
if(supported_rec_modes[i]==0)
{
logprintf(LOG_NOTICE,"the receive method of the "
"driver is not yet supported by lircd");
}
}
if(hw.rec_mode==LIRC_MODE_CODE)
{
hw.code_length=8;
}
else if(hw.rec_mode==LIRC_MODE_LIRCCODE)
{
if(ioctl(hw.fd,LIRC_GET_LENGTH,&hw.code_length)==-1)
{
logprintf(LOG_ERR,"could not get code length");
logperror(LOG_ERR,"default_init()");
default_deinit();
return(0);
}
if(hw.code_length>sizeof(ir_code)*CHAR_BIT)
{
logprintf(LOG_ERR,"lircd can not handle %lu bit "
"codes",hw.code_length);
default_deinit();
return(0);
}
}
if(!(hw.send_mode || hw.rec_mode))
{
default_deinit();
return(0);
}
#endif
return(1);
}
/* initialize driver -- returns 1 on success, 0 on error */
static int ati_init()
{
struct usb_device *usb_dev;
int pipe_fd[2] = { -1, -1 };
LOGPRINTF(1, "initializing USB receiver");
init_rec_buffer();
/* A separate process will be forked to read data from the USB
* receiver and write it to a pipe. hw.fd is set to the readable
* end of this pipe. */
if (pipe(pipe_fd) != 0) {
logperror(LOG_ERR, "couldn't open pipe");
return 0;
}
hw.fd = pipe_fd[0];
usb_dev = find_usb_device();
if (usb_dev == NULL) {
logprintf(LOG_ERR, "couldn't find a compatible USB device");
return 0;
}
if (!find_device_endpoints(usb_dev)) {
logprintf(LOG_ERR, "couldn't find device endpoints");
return 0;
}
dev_handle = usb_open(usb_dev);
if (dev_handle == NULL) {
logperror(LOG_ERR, "couldn't open USB receiver");
goto fail;
}
if (usb_claim_interface(dev_handle, 0) != 0) {
logperror(LOG_ERR, "couldn't claim USB interface");
goto fail;
}
errno = 0;
if ((usb_interrupt_write(dev_handle, dev_ep_out->bEndpointAddress, init1, sizeof(init1), 100) != sizeof(init1))
|| (usb_interrupt_write(dev_handle, dev_ep_out->bEndpointAddress, init2, sizeof(init2), 100) !=
sizeof(init2))) {
logprintf(LOG_ERR, "couldn't initialize USB receiver: %s", errno ? strerror(errno) : "short write");
goto fail;
}
child = fork();
if (child == -1) {
logperror(LOG_ERR, "couldn't fork child process");
goto fail;
} else if (child == 0) {
usb_read_loop(pipe_fd[1]);
}
LOGPRINTF(1, "USB receiver initialized");
return 1;
fail:
if (dev_handle) {
usb_close(dev_handle);
dev_handle = NULL;
}
if (pipe_fd[0] >= 0)
close(pipe_fd[0]);
if (pipe_fd[1] >= 0)
close(pipe_fd[1]);
return 0;
}
static int uirt2_raw_init(void)
{
int version;
if (!tty_create_lock(hw.device)) {
logprintf(LOG_ERR, "uirt2_raw: could not create lock files");
return (0);
}
if ((hw.fd = open(hw.device, O_RDWR | O_NONBLOCK | O_NOCTTY)) < 0) {
logprintf(LOG_ERR, "uirt2_raw: could not open %s", hw.device);
tty_delete_lock();
return (0);
}
if (!tty_reset(hw.fd)) {
logprintf(LOG_ERR, "uirt2_raw: could not reset tty");
close(hw.fd);
tty_delete_lock();
return (0);
}
/* Wait for UIRT device to power up */
usleep(100 * 1000);
if (!tty_setbaud(hw.fd, 115200)) {
logprintf(LOG_ERR, "uirt2_raw: could not set baud rate");
close(hw.fd);
tty_delete_lock();
return (0);
}
if (!tty_setcsize(hw.fd, 8)) {
logprintf(LOG_ERR, "uirt2_raw: could not set csize");
close(hw.fd);
tty_delete_lock();
return (0);
}
if (!tty_setrtscts(hw.fd, 1)) {
logprintf(LOG_ERR, "uirt2_raw: could not enable hardware flow");
close(hw.fd);
tty_delete_lock();
return (0);
}
if ((dev = uirt2_init(hw.fd)) == NULL) {
logprintf(LOG_ERR, "uirt2_raw: No UIRT2 device found at %s", hw.device);
close(hw.fd);
tty_delete_lock();
return (0);
}
if (uirt2_setmoderaw(dev) < 0) {
logprintf(LOG_ERR, "uirt2_raw: could not set raw mode");
uirt2_raw_deinit();
return (0);
}
if (uirt2_getversion(dev, &version) < 0) {
uirt2_raw_deinit();
return (0);
}
if (version >= 0x0905) {
if (!tty_setdtr(hw.fd, 0)) {
logprintf(LOG_ERR, "uirt2_raw: could not set DTR");
uirt2_raw_deinit();
return (0);
}
}
init_rec_buffer();
init_send_buffer();
rec_rptr = 0;
rec_wptr = 0;
rec_size = sizeof(rec_buf) / sizeof(rec_buf[0]);
return (1);
}
int audio_alsa_init()
{
int fd, err;
char *pcm_rate;
char tmp_name[20];
init_rec_buffer();
/* Create a temporary filename for our FIFO,
* Use mkstemp() instead of mktemp() although we need a FIFO not a
* regular file. We do this since glibc barfs at mktemp() and this
* scares the users :-)
*/
strcpy(tmp_name, "/tmp/lircXXXXXX");
fd = mkstemp(tmp_name);
close(fd);
/* Start the race! */
unlink(tmp_name);
if (mknod(tmp_name, S_IFIFO | S_IRUSR | S_IWUSR, 0)) {
logprintf(LOG_ERR, "could not create FIFO %s", tmp_name);
logperror(LOG_ERR, "audio_alsa_init ()");
return 0;
}
/* Phew, we won the race ... */
/* Open the pipe and hand it to LIRC ... */
hw.fd = open(tmp_name, O_RDWR);
if (hw.fd < 0) {
logprintf(LOG_ERR, "could not open pipe %s", tmp_name);
logperror(LOG_ERR, "audio_alsa_init ()");
error: unlink(tmp_name);
audio_alsa_deinit();
return 0;
}
/* Open the other end of the pipe and hand it to ALSA code.
* We're opening it in non-blocking mode to avoid lockups.
*/
alsa_hw.fd = open(tmp_name, O_RDWR | O_NONBLOCK);
/* Ok, we don't need the FIFO visible in the filesystem anymore ... */
unlink(tmp_name);
/* Examine the device name, if it contains a sample rate */
strncpy(tmp_name, hw.device, sizeof(tmp_name) - 1);
pcm_rate = strchr(tmp_name, '@');
if (pcm_rate) {
int rate;
char *stereo_channel;
/* Examine if we need to capture in stereo
* looking for an 'l' or 'r' character to indicate
* which channel to look at.*/
stereo_channel = strchr(pcm_rate, ',');
if (stereo_channel) {
/* Syntax in device string indicates we need
to use stereo */
alsa_hw.num_channels = 2;
/* As we are requesting stereo now, use the
more common signed 16bit samples */
alsa_hw.format = SND_PCM_FORMAT_S16_LE;
if (stereo_channel[1] == 'l') {
alsa_hw.channel = 0;
} else if (stereo_channel[1] == 'r') {
alsa_hw.channel = 1;
} else {
logperror(LOG_WARNING,
"dont understand which channel to use - defaulting to left\n");
}
}
/* Remove the sample rate from device name (and
channel indicator if present) */
*pcm_rate++ = 0;
/* See if rate is meaningful */
rate = atoi(pcm_rate);
if (rate > 0) {
alsa_hw.rate = rate;
}
}
/* Open the audio card in non-blocking mode */
err = snd_pcm_open(&alsa_hw.handle, tmp_name, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
if (err < 0) {
logprintf(LOG_ERR, "could not open audio device %s: %s", hw.device, snd_strerror(err));
logperror(LOG_ERR, "audio_alsa_init ()");
goto error;
}
/* Set up the I/O signal handler */
if (alsa_error
("async_add_handler", snd_async_add_pcm_handler(&alsa_hw.sighandler, alsa_hw.handle, alsa_sig_io, NULL)))
goto error;
/* Set sampling parameters */
if (alsa_set_hwparams(alsa_hw.handle))
goto error;
LOGPRINTF(LOG_INFO, "hw_audio_alsa: Using device '%s', sampling rate %dHz\n", tmp_name, alsa_hw.rate);
/* Start sampling data */
if (alsa_error("start", snd_pcm_start(alsa_hw.handle)))
goto error;
return 1;
}
