158 lines
4.6 KiB
C++
Executable File
158 lines
4.6 KiB
C++
Executable File
/*
|
|
* Audio Library for Linux and Windows
|
|
* ===================================
|
|
* Author: DJ0ABR
|
|
*
|
|
* Author: Kurt Moraw, Ham radio: DJ0ABR, github: dj0abr
|
|
* License: GPL-3
|
|
*
|
|
* compilation:
|
|
* Windows ... Visual Studio
|
|
* Linux ... make
|
|
*
|
|
* Documentation see: libkmaudio.h
|
|
*
|
|
* 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, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
* libkmaudio_capture.cpp ...
|
|
* starts a portaudio capture stream and a callback routine. Writes the
|
|
* received audio samples into the fifo (Windows only)
|
|
*/
|
|
#include "libkmaudio.h"
|
|
|
|
#define FRAMES_PER_BUFFER 512
|
|
|
|
int recordCallback(const void* inputBuffer, void* outputBuffer,
|
|
unsigned long framesPerBuffer,
|
|
const PaStreamCallbackTimeInfo* timeInfo,
|
|
PaStreamCallbackFlags statusFlags,
|
|
void* userData);
|
|
|
|
void close_capture_stream(int idx)
|
|
{
|
|
if (devlist[idx].capStream != NULL)
|
|
{
|
|
Pa_CloseStream(devlist[idx].capStream);
|
|
devlist[idx].capStream = NULL;
|
|
}
|
|
}
|
|
|
|
int kmaudio_startCapture(char* devname, int samprate)
|
|
{
|
|
printf("Start request for CAP stream:%s\n", devname);
|
|
|
|
if (devname == NULL || strlen(devname) < 3) // no devices defined yet
|
|
{
|
|
printf("no capture devices specified\n");
|
|
return -1;
|
|
}
|
|
|
|
int idx = searchDevice(devname, 0);
|
|
if (idx == -1)
|
|
{
|
|
printf("Device:<%s> not found\n", devname);
|
|
return -1;
|
|
}
|
|
|
|
devlist[idx].working = 0;
|
|
|
|
close_capture_stream(idx);
|
|
|
|
printf("Starting CAP stream:%s [%d]\n", devname, idx);
|
|
|
|
io_fifo_clear(idx);
|
|
|
|
devlist[idx].requested_samprate = samprate;
|
|
if(getRealSamprate(idx) == -1)
|
|
{
|
|
printf("Samplerate %d not supported by device:<%s>\n", samprate, devname);
|
|
return -1;
|
|
}
|
|
|
|
if (devlist[idx].requested_samprate != devlist[idx].real_samprate)
|
|
resampler_create(idx);
|
|
|
|
struct PaWasapiStreamInfo wasapiInfo;
|
|
memset(&wasapiInfo, 0, sizeof(PaWasapiStreamInfo));
|
|
wasapiInfo.size = sizeof(PaWasapiStreamInfo);
|
|
wasapiInfo.hostApiType = paWASAPI;
|
|
wasapiInfo.version = 1;
|
|
wasapiInfo.flags = (paWinWasapiExclusive | paWinWasapiThreadPriority);
|
|
wasapiInfo.threadPriority = eThreadPriorityProAudio;
|
|
|
|
devlist[idx].inputParameters.hostApiSpecificStreamInfo = (&wasapiInfo);
|
|
|
|
int e = Pa_IsFormatSupported(&devlist[idx].inputParameters, NULL, (double)devlist[idx].real_samprate);
|
|
printf("err:%d device:%d PAdev:%d samprate: %f\n", e,idx, devlist[idx].devnum,(double)devlist[idx].real_samprate);
|
|
|
|
devlist[idx].index = idx;
|
|
|
|
int err = Pa_OpenStream(
|
|
&devlist[idx].capStream,
|
|
&devlist[idx].inputParameters,
|
|
NULL,
|
|
(double)devlist[idx].real_samprate,
|
|
FRAMES_PER_BUFFER,
|
|
paClipOff,
|
|
recordCallback,
|
|
&(devlist[idx].index));
|
|
|
|
if (err != paNoError)
|
|
{
|
|
printf("cannot open capture stream for device:<%s> %d\n", devname,err);
|
|
return -1;
|
|
}
|
|
|
|
err = Pa_StartStream(devlist[idx].capStream);
|
|
if (err != paNoError)
|
|
{
|
|
printf("cannot start capture stream for device:<%s>\n", devname);
|
|
return -1;
|
|
}
|
|
|
|
printf("Capture started sucessfully\n");
|
|
devlist[idx].working = 1;
|
|
return idx;
|
|
}
|
|
|
|
int recordCallback( const void* inputBuffer,
|
|
void* outputBuffer,
|
|
unsigned long framesPerBuffer,
|
|
const PaStreamCallbackTimeInfo* timeInfo,
|
|
PaStreamCallbackFlags statusFlags,
|
|
void* userData)
|
|
{
|
|
const int16_t* rptr = (const int16_t*)inputBuffer;
|
|
int devidx = *((int *)userData);
|
|
int chans = devlist[devidx].inputParameters.channelCount;
|
|
|
|
//printf("%ld captured %d frames. Flag: %X\n", (long)rptr,framesPerBuffer, statusFlags);
|
|
//measure_speed_bps(framesPerBuffer);
|
|
|
|
//printf("%d %d\n", chans, rptr[0]);
|
|
for (unsigned int i = 0; i < framesPerBuffer; i++)
|
|
io_write_fifo_short(devidx, rptr[i * chans]);
|
|
|
|
// Prevent unused variable warnings
|
|
(void)outputBuffer;
|
|
(void)timeInfo;
|
|
(void)statusFlags;
|
|
|
|
if(keeprunning == 1)
|
|
return paContinue;
|
|
|
|
return paComplete;
|
|
}
|