cannam@124: /** @file paex_record.c cannam@124: @ingroup examples_src cannam@124: @brief Record input into an array; Save array to a file; Playback recorded data. cannam@124: @author Phil Burk http://www.softsynth.com cannam@124: */ cannam@124: /* cannam@124: * $Id: paex_record.c 1752 2011-09-08 03:21:55Z philburk $ cannam@124: * cannam@124: * This program uses the PortAudio Portable Audio Library. cannam@124: * For more information see: http://www.portaudio.com cannam@124: * Copyright (c) 1999-2000 Ross Bencina and Phil Burk cannam@124: * cannam@124: * Permission is hereby granted, free of charge, to any person obtaining cannam@124: * a copy of this software and associated documentation files cannam@124: * (the "Software"), to deal in the Software without restriction, cannam@124: * including without limitation the rights to use, copy, modify, merge, cannam@124: * publish, distribute, sublicense, and/or sell copies of the Software, cannam@124: * and to permit persons to whom the Software is furnished to do so, cannam@124: * subject to the following conditions: cannam@124: * cannam@124: * The above copyright notice and this permission notice shall be cannam@124: * included in all copies or substantial portions of the Software. cannam@124: * cannam@124: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, cannam@124: * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF cannam@124: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. cannam@124: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR cannam@124: * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF cannam@124: * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION cannam@124: * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. cannam@124: */ cannam@124: cannam@124: /* cannam@124: * The text above constitutes the entire PortAudio license; however, cannam@124: * the PortAudio community also makes the following non-binding requests: cannam@124: * cannam@124: * Any person wishing to distribute modifications to the Software is cannam@124: * requested to send the modifications to the original developer so that cannam@124: * they can be incorporated into the canonical version. It is also cannam@124: * requested that these non-binding requests be included along with the cannam@124: * license above. cannam@124: */ cannam@124: cannam@124: #include cannam@124: #include cannam@124: #include "portaudio.h" cannam@124: cannam@124: /* #define SAMPLE_RATE (17932) // Test failure to open with this value. */ cannam@124: #define SAMPLE_RATE (44100) cannam@124: #define FRAMES_PER_BUFFER (512) cannam@124: #define NUM_SECONDS (5) cannam@124: #define NUM_CHANNELS (2) cannam@124: /* #define DITHER_FLAG (paDitherOff) */ cannam@124: #define DITHER_FLAG (0) /**/ cannam@124: /** Set to 1 if you want to capture the recording to a file. */ cannam@124: #define WRITE_TO_FILE (0) cannam@124: cannam@124: /* Select sample format. */ cannam@124: #if 1 cannam@124: #define PA_SAMPLE_TYPE paFloat32 cannam@124: typedef float SAMPLE; cannam@124: #define SAMPLE_SILENCE (0.0f) cannam@124: #define PRINTF_S_FORMAT "%.8f" cannam@124: #elif 1 cannam@124: #define PA_SAMPLE_TYPE paInt16 cannam@124: typedef short SAMPLE; cannam@124: #define SAMPLE_SILENCE (0) cannam@124: #define PRINTF_S_FORMAT "%d" cannam@124: #elif 0 cannam@124: #define PA_SAMPLE_TYPE paInt8 cannam@124: typedef char SAMPLE; cannam@124: #define SAMPLE_SILENCE (0) cannam@124: #define PRINTF_S_FORMAT "%d" cannam@124: #else cannam@124: #define PA_SAMPLE_TYPE paUInt8 cannam@124: typedef unsigned char SAMPLE; cannam@124: #define SAMPLE_SILENCE (128) cannam@124: #define PRINTF_S_FORMAT "%d" cannam@124: #endif cannam@124: cannam@124: typedef struct cannam@124: { cannam@124: int frameIndex; /* Index into sample array. */ cannam@124: int maxFrameIndex; cannam@124: SAMPLE *recordedSamples; cannam@124: } cannam@124: paTestData; cannam@124: cannam@124: /* This routine will be called by the PortAudio engine when audio is needed. cannam@124: ** It may be called at interrupt level on some machines so don't do anything cannam@124: ** that could mess up the system like calling malloc() or free(). cannam@124: */ cannam@124: static int recordCallback( const void *inputBuffer, void *outputBuffer, cannam@124: unsigned long framesPerBuffer, cannam@124: const PaStreamCallbackTimeInfo* timeInfo, cannam@124: PaStreamCallbackFlags statusFlags, cannam@124: void *userData ) cannam@124: { cannam@124: paTestData *data = (paTestData*)userData; cannam@124: const SAMPLE *rptr = (const SAMPLE*)inputBuffer; cannam@124: SAMPLE *wptr = &data->recordedSamples[data->frameIndex * NUM_CHANNELS]; cannam@124: long framesToCalc; cannam@124: long i; cannam@124: int finished; cannam@124: unsigned long framesLeft = data->maxFrameIndex - data->frameIndex; cannam@124: cannam@124: (void) outputBuffer; /* Prevent unused variable warnings. */ cannam@124: (void) timeInfo; cannam@124: (void) statusFlags; cannam@124: (void) userData; cannam@124: cannam@124: if( framesLeft < framesPerBuffer ) cannam@124: { cannam@124: framesToCalc = framesLeft; cannam@124: finished = paComplete; cannam@124: } cannam@124: else cannam@124: { cannam@124: framesToCalc = framesPerBuffer; cannam@124: finished = paContinue; cannam@124: } cannam@124: cannam@124: if( inputBuffer == NULL ) cannam@124: { cannam@124: for( i=0; iframeIndex += framesToCalc; cannam@124: return finished; cannam@124: } cannam@124: cannam@124: /* This routine will be called by the PortAudio engine when audio is needed. cannam@124: ** It may be called at interrupt level on some machines so don't do anything cannam@124: ** that could mess up the system like calling malloc() or free(). cannam@124: */ cannam@124: static int playCallback( const void *inputBuffer, void *outputBuffer, cannam@124: unsigned long framesPerBuffer, cannam@124: const PaStreamCallbackTimeInfo* timeInfo, cannam@124: PaStreamCallbackFlags statusFlags, cannam@124: void *userData ) cannam@124: { cannam@124: paTestData *data = (paTestData*)userData; cannam@124: SAMPLE *rptr = &data->recordedSamples[data->frameIndex * NUM_CHANNELS]; cannam@124: SAMPLE *wptr = (SAMPLE*)outputBuffer; cannam@124: unsigned int i; cannam@124: int finished; cannam@124: unsigned int framesLeft = data->maxFrameIndex - data->frameIndex; cannam@124: cannam@124: (void) inputBuffer; /* Prevent unused variable warnings. */ cannam@124: (void) timeInfo; cannam@124: (void) statusFlags; cannam@124: (void) userData; cannam@124: cannam@124: if( framesLeft < framesPerBuffer ) cannam@124: { cannam@124: /* final buffer... */ cannam@124: for( i=0; iframeIndex += framesLeft; cannam@124: finished = paComplete; cannam@124: } cannam@124: else cannam@124: { cannam@124: for( i=0; iframeIndex += framesPerBuffer; cannam@124: finished = paContinue; cannam@124: } cannam@124: return finished; cannam@124: } cannam@124: cannam@124: /*******************************************************************/ cannam@124: int main(void); cannam@124: int main(void) cannam@124: { cannam@124: PaStreamParameters inputParameters, cannam@124: outputParameters; cannam@124: PaStream* stream; cannam@124: PaError err = paNoError; cannam@124: paTestData data; cannam@124: int i; cannam@124: int totalFrames; cannam@124: int numSamples; cannam@124: int numBytes; cannam@124: SAMPLE max, val; cannam@124: double average; cannam@124: cannam@124: printf("patest_record.c\n"); fflush(stdout); cannam@124: cannam@124: data.maxFrameIndex = totalFrames = NUM_SECONDS * SAMPLE_RATE; /* Record for a few seconds. */ cannam@124: data.frameIndex = 0; cannam@124: numSamples = totalFrames * NUM_CHANNELS; cannam@124: numBytes = numSamples * sizeof(SAMPLE); cannam@124: data.recordedSamples = (SAMPLE *) malloc( numBytes ); /* From now on, recordedSamples is initialised. */ cannam@124: if( data.recordedSamples == NULL ) cannam@124: { cannam@124: printf("Could not allocate record array.\n"); cannam@124: goto done; cannam@124: } cannam@124: for( i=0; idefaultLowInputLatency; cannam@124: inputParameters.hostApiSpecificStreamInfo = NULL; cannam@124: cannam@124: /* Record some audio. -------------------------------------------- */ cannam@124: err = Pa_OpenStream( cannam@124: &stream, cannam@124: &inputParameters, cannam@124: NULL, /* &outputParameters, */ cannam@124: SAMPLE_RATE, cannam@124: FRAMES_PER_BUFFER, cannam@124: paClipOff, /* we won't output out of range samples so don't bother clipping them */ cannam@124: recordCallback, cannam@124: &data ); cannam@124: if( err != paNoError ) goto done; cannam@124: cannam@124: err = Pa_StartStream( stream ); cannam@124: if( err != paNoError ) goto done; cannam@124: printf("\n=== Now recording!! Please speak into the microphone. ===\n"); fflush(stdout); cannam@124: cannam@124: while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) cannam@124: { cannam@124: Pa_Sleep(1000); cannam@124: printf("index = %d\n", data.frameIndex ); fflush(stdout); cannam@124: } cannam@124: if( err < 0 ) goto done; cannam@124: cannam@124: err = Pa_CloseStream( stream ); cannam@124: if( err != paNoError ) goto done; cannam@124: cannam@124: /* Measure maximum peak amplitude. */ cannam@124: max = 0; cannam@124: average = 0.0; cannam@124: for( i=0; i max ) cannam@124: { cannam@124: max = val; cannam@124: } cannam@124: average += val; cannam@124: } cannam@124: cannam@124: average = average / (double)numSamples; cannam@124: cannam@124: printf("sample max amplitude = "PRINTF_S_FORMAT"\n", max ); cannam@124: printf("sample average = %lf\n", average ); cannam@124: cannam@124: /* Write recorded data to a file. */ cannam@124: #if WRITE_TO_FILE cannam@124: { cannam@124: FILE *fid; cannam@124: fid = fopen("recorded.raw", "wb"); cannam@124: if( fid == NULL ) cannam@124: { cannam@124: printf("Could not open file."); cannam@124: } cannam@124: else cannam@124: { cannam@124: fwrite( data.recordedSamples, NUM_CHANNELS * sizeof(SAMPLE), totalFrames, fid ); cannam@124: fclose( fid ); cannam@124: printf("Wrote data to 'recorded.raw'\n"); cannam@124: } cannam@124: } cannam@124: #endif cannam@124: cannam@124: /* Playback recorded data. -------------------------------------------- */ cannam@124: data.frameIndex = 0; cannam@124: cannam@124: outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */ cannam@124: if (outputParameters.device == paNoDevice) { cannam@124: fprintf(stderr,"Error: No default output device.\n"); cannam@124: goto done; cannam@124: } cannam@124: outputParameters.channelCount = 2; /* stereo output */ cannam@124: outputParameters.sampleFormat = PA_SAMPLE_TYPE; cannam@124: outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; cannam@124: outputParameters.hostApiSpecificStreamInfo = NULL; cannam@124: cannam@124: printf("\n=== Now playing back. ===\n"); fflush(stdout); cannam@124: err = Pa_OpenStream( cannam@124: &stream, cannam@124: NULL, /* no input */ cannam@124: &outputParameters, cannam@124: SAMPLE_RATE, cannam@124: FRAMES_PER_BUFFER, cannam@124: paClipOff, /* we won't output out of range samples so don't bother clipping them */ cannam@124: playCallback, cannam@124: &data ); cannam@124: if( err != paNoError ) goto done; cannam@124: cannam@124: if( stream ) cannam@124: { cannam@124: err = Pa_StartStream( stream ); cannam@124: if( err != paNoError ) goto done; cannam@124: cannam@124: printf("Waiting for playback to finish.\n"); fflush(stdout); cannam@124: cannam@124: while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(100); cannam@124: if( err < 0 ) goto done; cannam@124: cannam@124: err = Pa_CloseStream( stream ); cannam@124: if( err != paNoError ) goto done; cannam@124: cannam@124: printf("Done.\n"); fflush(stdout); cannam@124: } cannam@124: cannam@124: done: cannam@124: Pa_Terminate(); cannam@124: if( data.recordedSamples ) /* Sure it is NULL or valid. */ cannam@124: free( data.recordedSamples ); cannam@124: if( err != paNoError ) cannam@124: { cannam@124: fprintf( stderr, "An error occured while using the portaudio stream\n" ); cannam@124: fprintf( stderr, "Error number: %d\n", err ); cannam@124: fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); cannam@124: err = 1; /* Always return 0 or 1, but no other return codes. */ cannam@124: } cannam@124: return err; cannam@124: } cannam@124: