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audio_portaudio.c
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//
// This file is part of Dire Wolf, an amateur radio packet TNC.
//
// Copyright (C) 2011, 2012, 2013, 2014, 2015 John Langner, WB2OSZ
// Copyright (C) 2015 Robert Stiles, KK5VD
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
/*------------------------------------------------------------------
*
* Module: audio_portaudio.c
*
* Purpose: Interface to audio device commonly called a "sound card" for
* historical reasons.
*
* This version is for Various OS' using Port Audio
*
* Major Revisions:
*
* 1.2 - Add ability to use more than one audio device.
* 1.3 - New file added for Port Audio for Mac and possibly others.
*
*---------------------------------------------------------------*/
#if defined(USE_PORTAUDIO)
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <assert.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <errno.h>
#include <pthread.h>
#include "direwolf.h"
#include "audio.h"
#include "audio_stats.h"
#include "textcolor.h"
#include "dtime_now.h"
#include "demod.h" /* for alevel_t & demod_get_audio_level() */
#include "portaudio.h"
/* Audio configuration. */
static struct audio_s *save_audio_config_p;
/* Current state for each of the audio devices. */
static struct adev_s {
pthread_mutex_t input_mutex;
pthread_cond_t input_cond;
PaStream *inStream;
PaStreamParameters inputParameters;
int pa_input_device_number;
int no_of_input_channels;
int input_finished;
int input_pause;
int input_flush;
void *audio_in_handle;
int inbuf_size_in_bytes; /* number of bytes allocated */
unsigned char *inbuf_ptr;
int inbuf_len; /* number byte of actual data available. */
int inbuf_next; /* index of next to remove. */
int inbuf_bytes_per_frame; /* number of bytes for a sample from all channels. */
int inbuf_frames_per_buffer; /* number of frames in a buffer. */
pthread_mutex_t output_mutex;
pthread_cond_t output_cond;
PaStream *outStream;
PaStreamParameters outputParameters;
int pa_output_device_number;
int no_of_output_channels;
int output_pause;
int output_finished;
int output_flush;
int output_wait_flag;
void *audio_out_handle;
int outbuf_size_in_bytes;
unsigned char *outbuf_ptr;
int outbuf_len;
int outbuf_next; /* index of next to remove. */
int outbuf_bytes_per_frame; /* number of bytes for a sample from all channels. */
int outbuf_frames_per_buffer; /* number of frames in a buffer. */
enum audio_in_type_e g_audio_in_type;
int udp_sock; /* UDP socket for receiving data */
} adev[MAX_ADEVS];
// Originally 40. Version 1.2, try 10 for lower latency.
#define ONE_BUF_TIME 10
#define SAMPLE_SILENCE 0
#define PA_INPUT 1
#define PA_OUTPUT 2
#define roundup1k(n) (((n) + 0x3ff) & ~0x3ff)
#undef FOR_FUTURE_USE
static int set_portaudio_params (int a, struct adev_s *dev, struct audio_s *pa, char *devname, char *inout);
static void print_pa_devices(void);
static int check_pa_configure(struct adev_s *dev, int sample_rate);
static void list_supported_sample_rates(struct adev_s *dev);
static int pa_devNN(char *deviceStr, char *_devName, size_t length, int *_devNo);
static int searchPADevice(struct adev_s *dev, char *_devName, int reqDeviceNo, int io_flag);
static int calcbufsize(int rate, int chans, int bits);
static int calcbufsize(int rate, int chans, int bits)
{
int size1 = (rate * chans * bits / 8 * ONE_BUF_TIME) / 1000;
int size2 = roundup1k(size1);
#if DEBUG
text_color_set(DW_COLOR_DEBUG);
dw_printf ("audio_open: calcbufsize (rate=%d, chans=%d, bits=%d) calc size=%d, round up to %d\n",
rate, chans, bits, size1, size2);
#endif
return (size2);
}
/*------------------------------------------------------------------
* Search the portaudio device tree looking for the request device.
* One of the issues with portaudio has to do with devices returning
* the same device name for more then one connected device
* (ie two SignaLinks). Appending a Portaudio device index to the
* the device name ensure we can find the correct one. And if it's not
* available return the first occurence that matches the device name.
*----------------------------------------------------------------*/
static int searchPADevice(struct adev_s *dev, char *_devName, int reqDeviceNo, int io_flag)
{
int numDevices = Pa_GetDeviceCount();
const PaDeviceInfo * di = (PaDeviceInfo *)0;
int i = 0;
// First check to see if the requested index matches the device name.
if(reqDeviceNo < numDevices) {
di = Pa_GetDeviceInfo((PaDeviceIndex) reqDeviceNo);
if(strncmp(di->name, _devName, 80) == 0) {
if((io_flag == PA_INPUT) && di->maxInputChannels)
return reqDeviceNo;
if((io_flag == PA_OUTPUT) && di->maxOutputChannels)
return reqDeviceNo;
}
}
// Requested device index doesn't match device name. Search for one.
for(i = 0; i < numDevices; i++) {
di = Pa_GetDeviceInfo((PaDeviceIndex) i);
if(strncmp(di->name, _devName, 80) == 0) {
if((io_flag == PA_INPUT) && di->maxInputChannels)
return i;
if((io_flag == PA_OUTPUT) && di->maxOutputChannels)
return i;
}
}
// No Matches found
return -1;
}
/*------------------------------------------------------------------
* Extract device name and number.
*----------------------------------------------------------------*/
static int pa_devNN(char *deviceStr, char *_devName, size_t length, int *_devNo)
{
char *cPtr = (char *)0;
char cVal = 0;
int count = 0;
char numStr[8];
if(!deviceStr || !_devName || !_devNo) {
dw_printf( "Internal Error: Func %s passed null pointer.\n", __func__);
return -1;
}
cPtr = deviceStr;
memset(_devName, 0, length);
memset(numStr, 0, sizeof(numStr));
while(*cPtr) {
cVal = *cPtr++;
if(cVal == ':') break;
if(((cVal >= ' ') && (cVal <= '~')) && (count < length)) {
_devName[count++] = cVal;
}
}
count = 0;
while(*cPtr) {
cVal = *cPtr++;
if(isdigit(cVal) && (count < (sizeof(numStr) - 1))) {
numStr[count++] = cVal;
}
}
if(numStr[0] == 0) {
*_devNo = 0;
} else {
sscanf(numStr, "%d", _devNo);
}
return 0;
}
/*------------------------------------------------------------------
* List the supported sample rates.
*----------------------------------------------------------------*/
static void list_supported_sample_rates(struct adev_s *dev)
{
static double standardSampleRates[] = {
8000.0, 9600.0, 11025.0, 12000.0, 16000.0, 22050.0, 24000.0, 32000.0,
44100.0, 48000.0, 88200.0, 96000.0, 192000.0, -1 /* negative terminated list */
};
int i, printCount;
PaError err;
printCount = 0;
for(i = 0; standardSampleRates[i] > 0; i++ ) {
err = Pa_IsFormatSupported(&dev->inputParameters, &dev->outputParameters, standardSampleRates[i] );
if( err == paFormatIsSupported ) {
if( printCount == 0 ) {
dw_printf( "\t%8.2f", standardSampleRates[i] );
printCount = 1;
}
else if( printCount == 4 ) {
dw_printf( ",\n\t%8.2f", standardSampleRates[i] );
printCount = 1;
}
else {
dw_printf( ", %8.2f", standardSampleRates[i] );
++printCount;
}
}
}
if( !printCount )
dw_printf( "None\n" );
else
dw_printf( "\n" );
}
/*------------------------------------------------------------------
* Check PA Configure parameters.
*----------------------------------------------------------------*/
static int check_pa_configure(struct adev_s *dev, int sample_rate)
{
if(!dev) {
dw_printf( "Internal Error: Func %s struct adev_s *dev null pointer.\n", __func__);
return -1;
}
PaError err = 0;
err = Pa_IsFormatSupported(&dev->inputParameters, &dev->outputParameters, sample_rate);
if(err == paFormatIsSupported) return 0;
dw_printf( "PortAudio Config Error: %s\n", Pa_GetErrorText(err));
return err;
}
/*------------------------------------------------------------------
* Print a list of device names and parameters
*----------------------------------------------------------------*/
static void print_pa_devices(void)
{
int i, numDevices, defaultDisplayed;
const PaDeviceInfo *deviceInfo;
numDevices = Pa_GetDeviceCount();
if( numDevices < 0 ) {
dw_printf( "ERROR: Pa_GetDeviceCount returned 0x%x\n", numDevices );
return;
}
dw_printf( "Number of devices = %d\n", numDevices );
for(i = 0; i < numDevices; i++ ) {
deviceInfo = Pa_GetDeviceInfo( i );
dw_printf( "--------------------------------------- device #%d\n", i );
/* Mark global and API specific default devices */
defaultDisplayed = 0;
if( i == Pa_GetDefaultInputDevice() ) {
dw_printf( "[ Default Input" );
defaultDisplayed = 1;
}
else if( i == Pa_GetHostApiInfo( deviceInfo->hostApi )->defaultInputDevice ) {
const PaHostApiInfo *hostInfo = Pa_GetHostApiInfo( deviceInfo->hostApi );
dw_printf( "[ Default %s Input", hostInfo->name );
defaultDisplayed = 1;
}
if( i == Pa_GetDefaultOutputDevice() ) {
dw_printf( (defaultDisplayed ? "," : "[") );
dw_printf( " Default Output" );
defaultDisplayed = 1;
}
else if( i == Pa_GetHostApiInfo( deviceInfo->hostApi )->defaultOutputDevice ) {
const PaHostApiInfo *hostInfo = Pa_GetHostApiInfo( deviceInfo->hostApi );
dw_printf( (defaultDisplayed ? "," : "[") );
dw_printf( " Default %s Output", hostInfo->name );
defaultDisplayed = 1;
}
if( defaultDisplayed )
dw_printf( " ]\n" );
/* print device info fields */
dw_printf( "Name = \"%s\"\n", deviceInfo->name );
dw_printf( "Host API = %s\n", Pa_GetHostApiInfo( deviceInfo->hostApi )->name );
dw_printf( "Max inputs = %d\n", deviceInfo->maxInputChannels );
dw_printf( "Max outputs = %d\n", deviceInfo->maxOutputChannels );
}
}
/*------------------------------------------------------------------
* Port Audio Input Callback
*----------------------------------------------------------------*/
static int paInput16CB( const void *inputBuffer, void *outputBuffer,
unsigned long framesPerBuffer,
const PaStreamCallbackTimeInfo* timeInfo,
PaStreamCallbackFlags statusFlags,
void *userData )
{
struct adev_s *data = (struct adev_s *) userData;
const int16_t *rptr = (const int16_t *) inputBuffer;
size_t framesToCalc = 0;
size_t i = 0;
int finished = 0;
int word = 0;
size_t bytes_left = data->inbuf_size_in_bytes - data->inbuf_len;
size_t framesLeft = bytes_left / data->inbuf_bytes_per_frame;
(void) outputBuffer; /* Prevent unused variable warnings. */
(void) timeInfo;
(void) statusFlags;
(void) userData;
if( framesLeft < framesPerBuffer ) {
framesToCalc = framesLeft;
finished = paComplete;
} else {
framesToCalc = framesPerBuffer;
finished = paContinue;
}
if( inputBuffer == NULL || data->input_flush) {
for(i = 0; i < framesToCalc; i++) {
data->inbuf_ptr[data->inbuf_len++] = SAMPLE_SILENCE;
data->inbuf_ptr[data->inbuf_len++] = SAMPLE_SILENCE;
if(data->no_of_input_channels == 2) {
data->inbuf_ptr[data->inbuf_len++] = SAMPLE_SILENCE;
data->inbuf_ptr[data->inbuf_len++] = SAMPLE_SILENCE;
}
}
} else {
for(i = 0; i < framesToCalc; i++) {
word = *rptr++; /* left */
data->inbuf_ptr[data->inbuf_len++] = word & 0xff;
data->inbuf_ptr[data->inbuf_len++] = (word >> 8) & 0xff;
if(data->no_of_input_channels == 2) {
word = *rptr++; /* right */
data->inbuf_ptr[data->inbuf_len++] = word & 0xff;
data->inbuf_ptr[data->inbuf_len++] = (word >> 8) & 0xff;
}
}
}
if((finished == paComplete) ||
(data->inbuf_len >= data->inbuf_size_in_bytes)) {
pthread_cond_signal(&data->input_cond);
finished = data->input_finished;
}
return finished;
}
#if FOR_FUTURE_USE
/*------------------------------------------------------------------
* Port Audio Output Callback
*----------------------------------------------------------------*/
static int paOutput16CB( const void *inputBuffer, void *outputBuffer,
unsigned long framesPerBuffer,
const PaStreamCallbackTimeInfo* timeInfo,
PaStreamCallbackFlags statusFlags,
void *userData)
{
struct adev_s *data = (struct adev_s *) userData;
int16_t *wptr = (int16_t *) outputBuffer;
size_t i = 0;
int finished = 0;
size_t bytes_left = data->outbuf_size_in_bytes - data->outbuf_len;
size_t framesLeft = bytes_left / data->outbuf_bytes_per_frame;
int word = 0;
(void) inputBuffer; /* Prevent unused variable warnings. */
(void) timeInfo;
(void) statusFlags;
(void) userData;
if(framesLeft && (framesLeft < framesPerBuffer)) {
/* final buffer... */
for(i = 0; i < framesLeft; i++ ) {
word = data->outbuf_ptr[data->outbuf_len++] & 0xff;
word |= (data->outbuf_ptr[data->outbuf_len++] << 8) & 0xff;
*wptr++ = word; /* left */
if(data->no_of_output_channels == 2 ) {
word = data->outbuf_ptr[data->outbuf_len++] & 0xff;
word |= (data->outbuf_ptr[data->outbuf_len++] << 8) & 0xff;
*wptr++ = word; /* right */
}
}
for( ; i < framesPerBuffer; i++ ) {
*wptr++ = 0; /* left */
if(data->no_of_output_channels == 2 )
*wptr++ = 0; /* right */
}
finished = paContinue;
} else {
for(i = 0; i < framesPerBuffer; i++ ) {
word = data->outbuf_ptr[data->outbuf_len++] & 0xff;
word |= (data->outbuf_ptr[data->outbuf_len++] << 8) & 0xff;
*wptr++ = word; /* left */
if(data->no_of_output_channels == 2) {
word = data->outbuf_ptr[data->outbuf_len++] & 0xff;
word |= (data->outbuf_ptr[data->outbuf_len++] << 8) & 0xff;
*wptr++ = word; /* right */
}
}
finished = paComplete;
}
if(data->output_flush) {
data->output_flush = 0;
finished = paComplete;
}
pthread_cond_signal(&data->output_cond);
finished = data->output_finished;
return finished;
}
#endif
/*------------------------------------------------------------------
*
* Name: audio_open
*
* Purpose: Open the digital audio device.
*
* New in version 1.0, we recognize "udp:" optionally
* followed by a port number.
*
* Inputs: pa - Address of structure of type audio_s.
*
* Using a structure, rather than separate arguments
* seemed to make sense because we often pass around
* the same set of parameters various places.
*
* The fields that we care about are:
* num_channels
* samples_per_sec
* bits_per_sample
* If zero, reasonable defaults will be provided.
*
* The device names are in adevice_in and adevice_out.
* where c is the "card" (for historical purposes)
* and d is the "device" within the "card."
*
*
* Outputs: pa - The ACTUAL values are returned here.
*
* These might not be exactly the same as what was requested.
*
* Example: ask for stereo, 16 bits, 22050 per second.
* An ordinary desktop/laptop PC should be able to handle this.
* However, some other sort of smaller device might be
* more restrictive in its capabilities.
* It might say, the best I can do is mono, 8 bit, 8000/sec.
*
* The sofware modem must use this ACTUAL information
* that the device is supplying, that could be different
* than what the user specified.
*
* Returns: 0 for success, -1 for failure.
*
*
*----------------------------------------------------------------*/
int audio_open (struct audio_s *pa)
{
int err = 0;
int chan = 0;
int a = 0;
int clear_value = 0;
char audio_in_name[80];
char audio_out_name[80];
static int initalize_flag = 0;
PaError paerr = paNoError;
if(!initalize_flag) {
paerr = Pa_Initialize();
initalize_flag = -1;
}
if(paerr != paNoError ) return -1;
save_audio_config_p = pa;
memset (adev, 0, sizeof(adev));
memset (audio_in_name, 0, sizeof(audio_in_name));
memset (audio_out_name, 0, sizeof(audio_out_name));
for (a = 0; a < MAX_ADEVS; a++) {
adev[a].udp_sock = -1;
}
/*
* Fill in defaults for any missing values.
*/
for (a = 0; a < MAX_ADEVS; a++) {
if (pa->adev[a].num_channels == 0)
pa->adev[a].num_channels = DEFAULT_NUM_CHANNELS;
if (pa->adev[a].samples_per_sec == 0)
pa->adev[a].samples_per_sec = DEFAULT_SAMPLES_PER_SEC;
if (pa->adev[a].bits_per_sample == 0)
pa->adev[a].bits_per_sample = DEFAULT_BITS_PER_SAMPLE;
for (chan = 0; chan < MAX_CHANS; chan++) {
if (pa->achan[chan].mark_freq == 0)
pa->achan[chan].mark_freq = DEFAULT_MARK_FREQ;
if (pa->achan[chan].space_freq == 0)
pa->achan[chan].space_freq = DEFAULT_SPACE_FREQ;
if (pa->achan[chan].baud == 0)
pa->achan[chan].baud = DEFAULT_BAUD;
if (pa->achan[chan].num_subchan == 0)
pa->achan[chan].num_subchan = 1;
}
}
/*
* Open audio device(s).
*/
for (a = 0; a < MAX_ADEVS; a++) {
if (pa->adev[a].defined) {
adev[a].inbuf_size_in_bytes = 0;
adev[a].outbuf_size_in_bytes = 0;
/*
* Determine the type of audio input.
*/
adev[a].g_audio_in_type = AUDIO_IN_TYPE_SOUNDCARD;
if (strcasecmp(pa->adev[a].adevice_in, "stdin") == 0 || strcmp(pa->adev[a].adevice_in, "-") == 0) {
adev[a].g_audio_in_type = AUDIO_IN_TYPE_STDIN;
/* Change "-" to stdin for readability. */
strlcpy (pa->adev[a].adevice_in, "stdin", sizeof(pa->adev[a].adevice_in));
}
if (strncasecmp(pa->adev[a].adevice_in, "udp:", 4) == 0) {
adev[a].g_audio_in_type = AUDIO_IN_TYPE_SDR_UDP;
/* Supply default port if none specified. */
if (strcasecmp(pa->adev[a].adevice_in,"udp") == 0 ||
strcasecmp(pa->adev[a].adevice_in,"udp:") == 0) {
snprintf (pa->adev[a].adevice_in, sizeof(pa->adev[a].adevice_in), "udp:%d", DEFAULT_UDP_AUDIO_PORT);
}
}
/* Let user know what is going on. */
/* If not specified, the device names should be "default". */
strlcpy (audio_in_name, pa->adev[a].adevice_in, sizeof(audio_in_name));
strlcpy (audio_out_name, pa->adev[a].adevice_out, sizeof(audio_out_name));
char ctemp[40];
if (pa->adev[a].num_channels == 2) {
snprintf (ctemp, sizeof(ctemp), " (channels %d & %d)", ADEVFIRSTCHAN(a), ADEVFIRSTCHAN(a)+1);
} else {
snprintf (ctemp, sizeof(ctemp), " (channel %d)", ADEVFIRSTCHAN(a));
}
text_color_set(DW_COLOR_INFO);
if (strcmp(audio_in_name,audio_out_name) == 0) {
dw_printf ("Audio device for both receive and transmit: %s %s\n", audio_in_name, ctemp);
} else {
dw_printf ("Audio input device for receive: %s %s\n", audio_in_name, ctemp);
dw_printf ("Audio out device for transmit: %s %s\n", audio_out_name, ctemp);
}
/*
* Now attempt actual opens.
*/
/*
* Input device.
*/
switch (adev[a].g_audio_in_type) {
case AUDIO_IN_TYPE_SOUNDCARD:
print_pa_devices();
err = set_portaudio_params (a, &adev[a], pa, audio_in_name, audio_out_name);
if(err < 0) return -1;
pthread_mutex_init(&adev[a].input_mutex, NULL);
pthread_cond_init(&adev[a].input_cond, NULL);
pthread_mutex_init(&adev[a].output_mutex, NULL);
pthread_cond_init(&adev[a].output_cond, NULL);
if(pa->adev[a].bits_per_sample == 8)
clear_value = 128;
else
clear_value = 0;
break;
/*
* UDP.
*/
case AUDIO_IN_TYPE_SDR_UDP:
// Create socket and bind socket
{
struct sockaddr_in si_me;
//Create UDP Socket
if ((adev[a].udp_sock=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP))==-1) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Couldn't create socket, errno %d\n", errno);
return -1;
}
memset((char *) &si_me, 0, sizeof(si_me));
si_me.sin_family = AF_INET;
si_me.sin_port = htons((short)atoi(audio_in_name+4));
si_me.sin_addr.s_addr = htonl(INADDR_ANY);
//Bind to the socket
if (bind(adev[a].udp_sock, (const struct sockaddr *) &si_me, sizeof(si_me))==-1) {
text_color_set(DW_COLOR_ERROR);
dw_printf ("Couldn't bind socket, errno %d\n", errno);
return -1;
}
}
//adev[a].inbuf_size_in_bytes = SDR_UDP_BUF_MAXLEN;
break;
/*
* stdin.
*/
case AUDIO_IN_TYPE_STDIN:
/* Do we need to adjust any properties of stdin? */
//adev[a].inbuf_size_in_bytes = 1024;
break;
default:
text_color_set(DW_COLOR_ERROR);
dw_printf ("Internal error, invalid audio_in_type\n");
return (-1);
}
/*
* Finally allocate buffer for each direction.
*/
adev[a].inbuf_ptr = malloc(adev[a].inbuf_size_in_bytes);
assert (adev[a].inbuf_ptr != NULL);
adev[a].inbuf_len = 0;
adev[a].inbuf_next = 0;
memset(adev[a].inbuf_ptr, clear_value, adev[a].inbuf_size_in_bytes);
adev[a].outbuf_ptr = malloc(adev[a].outbuf_size_in_bytes);
assert (adev[a].outbuf_ptr != NULL);
adev[a].outbuf_len = 0;
adev[a].outbuf_next = 0;
memset(adev[a].outbuf_ptr, clear_value, adev[a].outbuf_size_in_bytes);
if(adev[a].inStream) {
err = Pa_StartStream(adev[a].inStream);
if(err != paNoError) {
dw_printf ("Input stream start Error %s\n", Pa_GetErrorText(err));
}
}
if(adev[a].outStream) {
err = Pa_StartStream(adev[a].outStream);
if(err != paNoError) {
dw_printf ("Output stream start Error %s\n", Pa_GetErrorText(err));
}
}
} /* end of audio device defined */
} /* end of for each audio device */
return (0);
} /* end audio_open */
/*
* Set parameters for sound card.
*
* See ?? for details.
*/
static int set_portaudio_params (int a, struct adev_s *dev, struct audio_s *pa, char *_audio_in_name, char *_audio_out_name)
{
int numDevices = 0;
int err = 0;
int buffer_size = 0;
int sampleFormat = 0;
int no_of_bytes_per_sample = 0;
int reqInDeviceNo = 0;
int reqOutDeviceNo = 0;
char input_devName[80];
char output_devName[80];
text_color_set(DW_COLOR_ERROR);
if(!dev || !pa || !_audio_in_name || !_audio_out_name) {
dw_printf ("Internal error, invalid function parameter pointer(s) (null)\n");
return -1;
}
if(_audio_in_name[0] == 0) {
dw_printf ("Input device name null\n");
return -1;
}
if(_audio_out_name[0] == 0) {
dw_printf ("Output device name null\n");
return -1;
}
numDevices = Pa_GetDeviceCount();
if( numDevices < 0 ) {
dw_printf( "ERROR: Pa_GetDeviceCount returned 0x%x\n", numDevices );
return -1;
}
err = pa_devNN(_audio_in_name, input_devName, sizeof(input_devName), &reqInDeviceNo);
if(err < 0) return -1;
reqInDeviceNo = searchPADevice(dev, input_devName, reqInDeviceNo, PA_INPUT);
if(reqInDeviceNo < 0) {
dw_printf ("Requested Input Audio Device not found %s.\n", input_devName);
return -1;
}
err = pa_devNN(_audio_out_name, output_devName, sizeof(output_devName), &reqOutDeviceNo);
if(err < 0) return -1;
reqOutDeviceNo = searchPADevice(dev, output_devName, reqOutDeviceNo, PA_OUTPUT);
if(reqOutDeviceNo < 0) {
dw_printf ("Requested Output Audio Device not found %s.\n", output_devName);
return -1;
}
dev->pa_input_device_number = reqInDeviceNo;
dev->pa_output_device_number = reqOutDeviceNo;
switch(pa->adev[a].bits_per_sample) {
case 8:
sampleFormat = paInt8;
no_of_bytes_per_sample = sizeof(int8_t);
assert("int8_t size not equal to 1" && sizeof(int8_t) == 1);
break;
case 16:
sampleFormat = paInt16;
no_of_bytes_per_sample = sizeof(int16_t);
assert("int16_t size not equal to 2" && sizeof(int16_t) == 2);
break;
default:
dw_printf ("Unsupported Sample Size %s.\n", output_devName);
return -1;
}
buffer_size = calcbufsize(pa->adev[a].samples_per_sec, pa->adev[a].num_channels, pa->adev[a].bits_per_sample);
dev->inbuf_size_in_bytes = buffer_size;
dev->inbuf_bytes_per_frame = no_of_bytes_per_sample * pa->adev[a].num_channels;
dev->inbuf_frames_per_buffer = dev->inbuf_size_in_bytes / dev->inbuf_bytes_per_frame;
dev->inputParameters.device = dev->pa_input_device_number;
dev->inputParameters.channelCount = pa->adev[a].num_channels;
dev->inputParameters.sampleFormat = sampleFormat;
dev->inputParameters.suggestedLatency = Pa_GetDeviceInfo(dev->inputParameters.device)->defaultLowInputLatency;
dev->inputParameters.hostApiSpecificStreamInfo = NULL;
dev->outbuf_size_in_bytes = buffer_size;
dev->outbuf_bytes_per_frame = no_of_bytes_per_sample * pa->adev[a].num_channels;
dev->outbuf_frames_per_buffer = dev->outbuf_size_in_bytes / dev->outbuf_bytes_per_frame;
dev->outputParameters.device = dev->pa_output_device_number;
dev->outputParameters.channelCount = pa->adev[a].num_channels;
dev->outputParameters.sampleFormat = sampleFormat;
dev->outputParameters.suggestedLatency = Pa_GetDeviceInfo(dev->outputParameters.device)->defaultHighOutputLatency;
dev->outputParameters.hostApiSpecificStreamInfo = NULL;
err = check_pa_configure(dev, pa->adev[a].samples_per_sec);
if(err) {
if(err == paInvalidSampleRate)
list_supported_sample_rates(dev);
return -1;
}
err = Pa_OpenStream(&dev->inStream, &dev->inputParameters, NULL,
pa->adev[a].samples_per_sec, dev->inbuf_frames_per_buffer, 0, paInput16CB, dev );
if( err != paNoError ) {
dw_printf( "PortAudio OpenStream (input) Error: %s\n", Pa_GetErrorText(err));
return -1;
}
err = Pa_OpenStream(&dev->outStream, NULL, &dev->outputParameters,
// pa->adev[a].samples_per_sec, framesPerBuffer, 0, paOutput16CB, dev );
pa->adev[a].samples_per_sec, dev->outbuf_frames_per_buffer, 0, NULL, dev );
if( err != paNoError ) {
dw_printf( "PortAudio OpenStream (output) Error: %s\n", Pa_GetErrorText(err));
return -1;
}
dev->input_finished = paContinue;
dev->output_finished = paContinue;
return buffer_size;
}
/*------------------------------------------------------------------
*
* Name: audio_get
*
* Purpose: Get one byte from the audio device.
*
* Inputs: a - Our number for audio device.
*
* Returns: 0 - 255 for a valid sample.
* -1 for any type of error.
*
* Description: The caller must deal with the details of mono/stereo
* and number of bytes per sample.
*
* This will wait if no data is currently available.
*
*----------------------------------------------------------------*/
// Use hot attribute for all functions called for every audio sample.
__attribute__((hot))
int audio_get (int a)
{
int n;
int retries = 0;
#if DEBUGx
text_color_set(DW_COLOR_DEBUG);
dw_printf ("audio_get():\n");
#endif
assert (adev[a].inbuf_size_in_bytes >= 100 && adev[a].inbuf_size_in_bytes <= 32768);
switch (adev[a].g_audio_in_type) {
/*
* Soundcard - PortAudio
*/
case AUDIO_IN_TYPE_SOUNDCARD:
while (adev[a].inbuf_next >= adev[a].inbuf_len) {
assert (adev[a].inStream != NULL);
#if DEBUGx
text_color_set(DW_COLOR_DEBUG);
dw_printf ("audio_get(): readi asking for %d frames\n", adev[a].inbuf_size_in_bytes / adev[a].bytes_per_frame);
#endif
if(adev[a].inbuf_len >= adev[a].inbuf_size_in_bytes) {
adev[a].inbuf_len = 0;
adev[a].inbuf_next = 0;
}
pthread_mutex_lock(&adev[a].input_mutex);
pthread_cond_wait(&adev[a].input_cond, &adev[a].input_mutex);
pthread_mutex_unlock(&adev[a].input_mutex);
n = adev[a].inbuf_len / adev[a].inbuf_bytes_per_frame;
#if DEBUGx
text_color_set(DW_COLOR_DEBUG);
dw_printf ("audio_get(): readi asked for %d and got %d frames\n",
adev[a].inbuf_size_in_bytes / adev[a].bytes_per_frame, n);
#endif
if (n > 0) {
/* Success */
adev[a].inbuf_len = n * adev[a].inbuf_bytes_per_frame; /* convert to number of bytes */
adev[a].inbuf_next = 0;
audio_stats (a,
save_audio_config_p->adev[a].num_channels,
n,
save_audio_config_p->statistics_interval);
}
else if (n == 0) {
/* Didn't expect this, but it's not a problem. */
/* Wait a little while and try again. */
text_color_set(DW_COLOR_ERROR);
dw_printf ("[%s], Audio input got zero bytes\n", __func__);
SLEEP_MS(10);
adev[a].inbuf_len = 0;
adev[a].inbuf_next = 0;
}
else {
/* Error */
// TODO: Needs more study and testing.
// TODO: print n. should snd_strerror use n or errno?
// Audio input device error: Unknown error
text_color_set(DW_COLOR_ERROR);
dw_printf ("Audio input device %d error\n", a);
audio_stats (a,
save_audio_config_p->adev[a].num_channels,
0,
save_audio_config_p->statistics_interval);
/* Try to recover a few times and eventually give up. */
if (++retries > 10) {
adev[a].inbuf_len = 0;
adev[a].inbuf_next = 0;
return (-1);
}
if (n == -EPIPE) {
/* EPIPE means overrun */