354 lines
12 KiB
C
354 lines
12 KiB
C
/** @file paex_record.c
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@ingroup examples_src
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@brief Record input into an array; Save array to a file; Playback recorded data.
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@author Phil Burk http://www.softsynth.com
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*/
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/*
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* $Id$
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*
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* This program uses the PortAudio Portable Audio Library.
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* For more information see: http://www.portaudio.com
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* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* The text above constitutes the entire PortAudio license; however,
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* the PortAudio community also makes the following non-binding requests:
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*
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* Any person wishing to distribute modifications to the Software is
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* requested to send the modifications to the original developer so that
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* they can be incorporated into the canonical version. It is also
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* requested that these non-binding requests be included along with the
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* license above.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "portaudio.h"
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/* #define SAMPLE_RATE (17932) // Test failure to open with this value. */
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#define SAMPLE_RATE (44100)
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#define FRAMES_PER_BUFFER (512)
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#define NUM_SECONDS (5)
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#define NUM_CHANNELS (2)
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/* #define DITHER_FLAG (paDitherOff) */
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#define DITHER_FLAG (0) /**/
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/** Set to 1 if you want to capture the recording to a file. */
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#define WRITE_TO_FILE (0)
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/* Select sample format. */
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#if 1
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#define PA_SAMPLE_TYPE paFloat32
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typedef float SAMPLE;
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#define SAMPLE_SILENCE (0.0f)
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#define PRINTF_S_FORMAT "%.8f"
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#elif 1
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#define PA_SAMPLE_TYPE paInt16
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typedef short SAMPLE;
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#define SAMPLE_SILENCE (0)
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#define PRINTF_S_FORMAT "%d"
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#elif 0
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#define PA_SAMPLE_TYPE paInt8
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typedef char SAMPLE;
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#define SAMPLE_SILENCE (0)
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#define PRINTF_S_FORMAT "%d"
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#else
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#define PA_SAMPLE_TYPE paUInt8
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typedef unsigned char SAMPLE;
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#define SAMPLE_SILENCE (128)
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#define PRINTF_S_FORMAT "%d"
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#endif
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typedef struct
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{
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int frameIndex; /* Index into sample array. */
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int maxFrameIndex;
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SAMPLE *recordedSamples;
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}
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paTestData;
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/* This routine will be called by the PortAudio engine when audio is needed.
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** It may be called at interrupt level on some machines so don't do anything
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** that could mess up the system like calling malloc() or free().
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*/
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static int recordCallback( const void *inputBuffer, void *outputBuffer,
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unsigned long framesPerBuffer,
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const PaStreamCallbackTimeInfo* timeInfo,
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PaStreamCallbackFlags statusFlags,
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void *userData )
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{
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paTestData *data = (paTestData*)userData;
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const SAMPLE *rptr = (const SAMPLE*)inputBuffer;
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SAMPLE *wptr = &data->recordedSamples[data->frameIndex * NUM_CHANNELS];
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long framesToCalc;
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long i;
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int finished;
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unsigned long framesLeft = data->maxFrameIndex - data->frameIndex;
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(void) outputBuffer; /* Prevent unused variable warnings. */
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(void) timeInfo;
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(void) statusFlags;
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(void) userData;
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if( framesLeft < framesPerBuffer )
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{
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framesToCalc = framesLeft;
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finished = paComplete;
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}
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else
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{
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framesToCalc = framesPerBuffer;
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finished = paContinue;
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}
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if( inputBuffer == NULL )
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{
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for( i=0; i<framesToCalc; i++ )
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{
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*wptr++ = SAMPLE_SILENCE; /* left */
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if( NUM_CHANNELS == 2 ) *wptr++ = SAMPLE_SILENCE; /* right */
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}
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}
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else
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{
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for( i=0; i<framesToCalc; i++ )
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{
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*wptr++ = *rptr++; /* left */
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if( NUM_CHANNELS == 2 ) *wptr++ = *rptr++; /* right */
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}
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}
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data->frameIndex += framesToCalc;
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return finished;
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}
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/* This routine will be called by the PortAudio engine when audio is needed.
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** It may be called at interrupt level on some machines so don't do anything
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** that could mess up the system like calling malloc() or free().
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*/
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static int playCallback( const void *inputBuffer, void *outputBuffer,
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unsigned long framesPerBuffer,
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const PaStreamCallbackTimeInfo* timeInfo,
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PaStreamCallbackFlags statusFlags,
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void *userData )
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{
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paTestData *data = (paTestData*)userData;
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SAMPLE *rptr = &data->recordedSamples[data->frameIndex * NUM_CHANNELS];
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SAMPLE *wptr = (SAMPLE*)outputBuffer;
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unsigned int i;
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int finished;
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unsigned int framesLeft = data->maxFrameIndex - data->frameIndex;
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(void) inputBuffer; /* Prevent unused variable warnings. */
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(void) timeInfo;
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(void) statusFlags;
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(void) userData;
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if( framesLeft < framesPerBuffer )
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{
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/* final buffer... */
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for( i=0; i<framesLeft; i++ )
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{
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*wptr++ = *rptr++; /* left */
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if( NUM_CHANNELS == 2 ) *wptr++ = *rptr++; /* right */
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}
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for( ; i<framesPerBuffer; i++ )
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{
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*wptr++ = 0; /* left */
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if( NUM_CHANNELS == 2 ) *wptr++ = 0; /* right */
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}
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data->frameIndex += framesLeft;
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finished = paComplete;
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}
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else
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{
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for( i=0; i<framesPerBuffer; i++ )
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{
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*wptr++ = *rptr++; /* left */
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if( NUM_CHANNELS == 2 ) *wptr++ = *rptr++; /* right */
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}
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data->frameIndex += framesPerBuffer;
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finished = paContinue;
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}
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return finished;
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}
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/*******************************************************************/
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int main(void);
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int main(void)
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{
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PaStreamParameters inputParameters,
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outputParameters;
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PaStream* stream;
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PaError err = paNoError;
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paTestData data;
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int i;
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int totalFrames;
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int numSamples;
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int numBytes;
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SAMPLE max, val;
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double average;
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printf("patest_record.c\n"); fflush(stdout);
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data.maxFrameIndex = totalFrames = NUM_SECONDS * SAMPLE_RATE; /* Record for a few seconds. */
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data.frameIndex = 0;
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numSamples = totalFrames * NUM_CHANNELS;
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numBytes = numSamples * sizeof(SAMPLE);
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data.recordedSamples = (SAMPLE *) malloc( numBytes ); /* From now on, recordedSamples is initialised. */
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if( data.recordedSamples == NULL )
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{
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printf("Could not allocate record array.\n");
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goto done;
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}
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for( i=0; i<numSamples; i++ ) data.recordedSamples[i] = 0;
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err = Pa_Initialize();
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if( err != paNoError ) goto done;
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inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */
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if (inputParameters.device == paNoDevice) {
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fprintf(stderr,"Error: No default input device.\n");
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goto done;
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}
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inputParameters.channelCount = 2; /* stereo input */
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inputParameters.sampleFormat = PA_SAMPLE_TYPE;
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inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency;
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inputParameters.hostApiSpecificStreamInfo = NULL;
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/* Record some audio. -------------------------------------------- */
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err = Pa_OpenStream(
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&stream,
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&inputParameters,
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NULL, /* &outputParameters, */
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SAMPLE_RATE,
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FRAMES_PER_BUFFER,
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paClipOff, /* we won't output out of range samples so don't bother clipping them */
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recordCallback,
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&data );
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if( err != paNoError ) goto done;
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err = Pa_StartStream( stream );
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if( err != paNoError ) goto done;
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printf("\n=== Now recording!! Please speak into the microphone. ===\n"); fflush(stdout);
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while( ( err = Pa_IsStreamActive( stream ) ) == 1 )
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{
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Pa_Sleep(1000);
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printf("index = %d\n", data.frameIndex ); fflush(stdout);
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}
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if( err < 0 ) goto done;
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err = Pa_CloseStream( stream );
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if( err != paNoError ) goto done;
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/* Measure maximum peak amplitude. */
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max = 0;
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average = 0.0;
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for( i=0; i<numSamples; i++ )
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{
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val = data.recordedSamples[i];
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if( val < 0 ) val = -val; /* ABS */
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if( val > max )
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{
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max = val;
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}
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average += val;
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}
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average = average / (double)numSamples;
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printf("sample max amplitude = "PRINTF_S_FORMAT"\n", max );
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printf("sample average = %lf\n", average );
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/* Write recorded data to a file. */
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#if WRITE_TO_FILE
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{
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FILE *fid;
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fid = fopen("recorded.raw", "wb");
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if( fid == NULL )
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{
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printf("Could not open file.");
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}
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else
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{
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fwrite( data.recordedSamples, NUM_CHANNELS * sizeof(SAMPLE), totalFrames, fid );
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fclose( fid );
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printf("Wrote data to 'recorded.raw'\n");
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}
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}
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#endif
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/* Playback recorded data. -------------------------------------------- */
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data.frameIndex = 0;
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outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
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if (outputParameters.device == paNoDevice) {
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fprintf(stderr,"Error: No default output device.\n");
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goto done;
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}
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outputParameters.channelCount = 2; /* stereo output */
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outputParameters.sampleFormat = PA_SAMPLE_TYPE;
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outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
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outputParameters.hostApiSpecificStreamInfo = NULL;
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printf("\n=== Now playing back. ===\n"); fflush(stdout);
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err = Pa_OpenStream(
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&stream,
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NULL, /* no input */
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&outputParameters,
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SAMPLE_RATE,
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FRAMES_PER_BUFFER,
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paClipOff, /* we won't output out of range samples so don't bother clipping them */
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playCallback,
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&data );
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if( err != paNoError ) goto done;
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if( stream )
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{
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err = Pa_StartStream( stream );
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if( err != paNoError ) goto done;
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printf("Waiting for playback to finish.\n"); fflush(stdout);
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while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(100);
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if( err < 0 ) goto done;
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err = Pa_CloseStream( stream );
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if( err != paNoError ) goto done;
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printf("Done.\n"); fflush(stdout);
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}
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done:
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Pa_Terminate();
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if( data.recordedSamples ) /* Sure it is NULL or valid. */
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free( data.recordedSamples );
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if( err != paNoError )
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{
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fprintf( stderr, "An error occurred while using the portaudio stream\n" );
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fprintf( stderr, "Error number: %d\n", err );
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fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
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err = 1; /* Always return 0 or 1, but no other return codes. */
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}
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return err;
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}
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