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Diffstat (limited to 'portaudio/examples/paex_record.c')
| -rw-r--r-- | portaudio/examples/paex_record.c | 353 |
1 files changed, 0 insertions, 353 deletions
diff --git a/portaudio/examples/paex_record.c b/portaudio/examples/paex_record.c deleted file mode 100644 index 53bf571..0000000 --- a/portaudio/examples/paex_record.c +++ /dev/null @@ -1,353 +0,0 @@ -/** @file paex_record.c - @ingroup examples_src - @brief Record input into an array; Save array to a file; Playback recorded data. - @author Phil Burk http://www.softsynth.com -*/ -/* - * $Id$ - * - * This program uses the PortAudio Portable Audio Library. - * For more information see: http://www.portaudio.com - * Copyright (c) 1999-2000 Ross Bencina and Phil Burk - * - * Permission is hereby granted, free of charge, to any person obtaining - * a copy of this software and associated documentation files - * (the "Software"), to deal in the Software without restriction, - * including without limitation the rights to use, copy, modify, merge, - * publish, distribute, sublicense, and/or sell copies of the Software, - * and to permit persons to whom the Software is furnished to do so, - * subject to the following conditions: - * - * The above copyright notice and this permission notice shall be - * included in all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. - * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR - * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF - * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION - * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - */ - -/* - * The text above constitutes the entire PortAudio license; however, - * the PortAudio community also makes the following non-binding requests: - * - * Any person wishing to distribute modifications to the Software is - * requested to send the modifications to the original developer so that - * they can be incorporated into the canonical version. It is also - * requested that these non-binding requests be included along with the - * license above. - */ - -#include <stdio.h> -#include <stdlib.h> -#include "portaudio.h" - -/* #define SAMPLE_RATE (17932) // Test failure to open with this value. */ -#define SAMPLE_RATE (44100) -#define FRAMES_PER_BUFFER (512) -#define NUM_SECONDS (5) -#define NUM_CHANNELS (2) -/* #define DITHER_FLAG (paDitherOff) */ -#define DITHER_FLAG (0) /**/ -/** Set to 1 if you want to capture the recording to a file. */ -#define WRITE_TO_FILE (0) - -/* Select sample format. */ -#if 1 -#define PA_SAMPLE_TYPE paFloat32 -typedef float SAMPLE; -#define SAMPLE_SILENCE (0.0f) -#define PRINTF_S_FORMAT "%.8f" -#elif 1 -#define PA_SAMPLE_TYPE paInt16 -typedef short SAMPLE; -#define SAMPLE_SILENCE (0) -#define PRINTF_S_FORMAT "%d" -#elif 0 -#define PA_SAMPLE_TYPE paInt8 -typedef char SAMPLE; -#define SAMPLE_SILENCE (0) -#define PRINTF_S_FORMAT "%d" -#else -#define PA_SAMPLE_TYPE paUInt8 -typedef unsigned char SAMPLE; -#define SAMPLE_SILENCE (128) -#define PRINTF_S_FORMAT "%d" -#endif - -typedef struct -{ - int frameIndex; /* Index into sample array. */ - int maxFrameIndex; - SAMPLE *recordedSamples; -} -paTestData; - -/* This routine will be called by the PortAudio engine when audio is needed. -** It may be called at interrupt level on some machines so don't do anything -** that could mess up the system like calling malloc() or free(). -*/ -static int recordCallback( const void *inputBuffer, void *outputBuffer, - unsigned long framesPerBuffer, - const PaStreamCallbackTimeInfo* timeInfo, - PaStreamCallbackFlags statusFlags, - void *userData ) -{ - paTestData *data = (paTestData*)userData; - const SAMPLE *rptr = (const SAMPLE*)inputBuffer; - SAMPLE *wptr = &data->recordedSamples[data->frameIndex * NUM_CHANNELS]; - long framesToCalc; - long i; - int finished; - unsigned long framesLeft = data->maxFrameIndex - data->frameIndex; - - (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 ) - { - for( i=0; i<framesToCalc; i++ ) - { - *wptr++ = SAMPLE_SILENCE; /* left */ - if( NUM_CHANNELS == 2 ) *wptr++ = SAMPLE_SILENCE; /* right */ - } - } - else - { - for( i=0; i<framesToCalc; i++ ) - { - *wptr++ = *rptr++; /* left */ - if( NUM_CHANNELS == 2 ) *wptr++ = *rptr++; /* right */ - } - } - data->frameIndex += framesToCalc; - return finished; -} - -/* This routine will be called by the PortAudio engine when audio is needed. -** It may be called at interrupt level on some machines so don't do anything -** that could mess up the system like calling malloc() or free(). -*/ -static int playCallback( const void *inputBuffer, void *outputBuffer, - unsigned long framesPerBuffer, - const PaStreamCallbackTimeInfo* timeInfo, - PaStreamCallbackFlags statusFlags, - void *userData ) -{ - paTestData *data = (paTestData*)userData; - SAMPLE *rptr = &data->recordedSamples[data->frameIndex * NUM_CHANNELS]; - SAMPLE *wptr = (SAMPLE*)outputBuffer; - unsigned int i; - int finished; - unsigned int framesLeft = data->maxFrameIndex - data->frameIndex; - - (void) inputBuffer; /* Prevent unused variable warnings. */ - (void) timeInfo; - (void) statusFlags; - (void) userData; - - if( framesLeft < framesPerBuffer ) - { - /* final buffer... */ - for( i=0; i<framesLeft; i++ ) - { - *wptr++ = *rptr++; /* left */ - if( NUM_CHANNELS == 2 ) *wptr++ = *rptr++; /* right */ - } - for( ; i<framesPerBuffer; i++ ) - { - *wptr++ = 0; /* left */ - if( NUM_CHANNELS == 2 ) *wptr++ = 0; /* right */ - } - data->frameIndex += framesLeft; - finished = paComplete; - } - else - { - for( i=0; i<framesPerBuffer; i++ ) - { - *wptr++ = *rptr++; /* left */ - if( NUM_CHANNELS == 2 ) *wptr++ = *rptr++; /* right */ - } - data->frameIndex += framesPerBuffer; - finished = paContinue; - } - return finished; -} - -/*******************************************************************/ -int main(void); -int main(void) -{ - PaStreamParameters inputParameters, - outputParameters; - PaStream* stream; - PaError err = paNoError; - paTestData data; - int i; - int totalFrames; - int numSamples; - int numBytes; - SAMPLE max, val; - double average; - - printf("patest_record.c\n"); fflush(stdout); - - data.maxFrameIndex = totalFrames = NUM_SECONDS * SAMPLE_RATE; /* Record for a few seconds. */ - data.frameIndex = 0; - numSamples = totalFrames * NUM_CHANNELS; - numBytes = numSamples * sizeof(SAMPLE); - data.recordedSamples = (SAMPLE *) malloc( numBytes ); /* From now on, recordedSamples is initialised. */ - if( data.recordedSamples == NULL ) - { - printf("Could not allocate record array.\n"); - goto done; - } - for( i=0; i<numSamples; i++ ) data.recordedSamples[i] = 0; - - err = Pa_Initialize(); - if( err != paNoError ) goto done; - - inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */ - if (inputParameters.device == paNoDevice) { - fprintf(stderr,"Error: No default input device.\n"); - goto done; - } - inputParameters.channelCount = 2; /* stereo input */ - inputParameters.sampleFormat = PA_SAMPLE_TYPE; - inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency; - inputParameters.hostApiSpecificStreamInfo = NULL; - - /* Record some audio. -------------------------------------------- */ - err = Pa_OpenStream( - &stream, - &inputParameters, - NULL, /* &outputParameters, */ - SAMPLE_RATE, - FRAMES_PER_BUFFER, - paClipOff, /* we won't output out of range samples so don't bother clipping them */ - recordCallback, - &data ); - if( err != paNoError ) goto done; - - err = Pa_StartStream( stream ); - if( err != paNoError ) goto done; - printf("\n=== Now recording!! Please speak into the microphone. ===\n"); fflush(stdout); - - while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) - { - Pa_Sleep(1000); - printf("index = %d\n", data.frameIndex ); fflush(stdout); - } - if( err < 0 ) goto done; - - err = Pa_CloseStream( stream ); - if( err != paNoError ) goto done; - - /* Measure maximum peak amplitude. */ - max = 0; - average = 0.0; - for( i=0; i<numSamples; i++ ) - { - val = data.recordedSamples[i]; - if( val < 0 ) val = -val; /* ABS */ - if( val > max ) - { - max = val; - } - average += val; - } - - average = average / (double)numSamples; - - printf("sample max amplitude = "PRINTF_S_FORMAT"\n", max ); - printf("sample average = %lf\n", average ); - - /* Write recorded data to a file. */ -#if WRITE_TO_FILE - { - FILE *fid; - fid = fopen("recorded.raw", "wb"); - if( fid == NULL ) - { - printf("Could not open file."); - } - else - { - fwrite( data.recordedSamples, NUM_CHANNELS * sizeof(SAMPLE), totalFrames, fid ); - fclose( fid ); - printf("Wrote data to 'recorded.raw'\n"); - } - } -#endif - - /* Playback recorded data. -------------------------------------------- */ - data.frameIndex = 0; - - outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */ - if (outputParameters.device == paNoDevice) { - fprintf(stderr,"Error: No default output device.\n"); - goto done; - } - outputParameters.channelCount = 2; /* stereo output */ - outputParameters.sampleFormat = PA_SAMPLE_TYPE; - outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; - outputParameters.hostApiSpecificStreamInfo = NULL; - - printf("\n=== Now playing back. ===\n"); fflush(stdout); - err = Pa_OpenStream( - &stream, - NULL, /* no input */ - &outputParameters, - SAMPLE_RATE, - FRAMES_PER_BUFFER, - paClipOff, /* we won't output out of range samples so don't bother clipping them */ - playCallback, - &data ); - if( err != paNoError ) goto done; - - if( stream ) - { - err = Pa_StartStream( stream ); - if( err != paNoError ) goto done; - - printf("Waiting for playback to finish.\n"); fflush(stdout); - - while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(100); - if( err < 0 ) goto done; - - err = Pa_CloseStream( stream ); - if( err != paNoError ) goto done; - - printf("Done.\n"); fflush(stdout); - } - -done: - Pa_Terminate(); - if( data.recordedSamples ) /* Sure it is NULL or valid. */ - free( data.recordedSamples ); - if( err != paNoError ) - { - fprintf( stderr, "An error occurred while using the portaudio stream\n" ); - fprintf( stderr, "Error number: %d\n", err ); - fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); - err = 1; /* Always return 0 or 1, but no other return codes. */ - } - return err; -} |