[Stk] RtAudio - Read entire file to memory
TJF
tjfoerster at web.de
Tue Mar 30 03:42:00 PDT 2010
Hi Steve,
ok. Here the complete code:
Regards
Thomas
/******************************************/
/*
playraw.cpp
by Gary P. Scavone, 2007
Play a specified raw file. It is necessary
that the file be of the same data format as
defined below.
*/
/******************************************/
#include "RtAudio.h"
#include <iostream>
#include <cstdlib>
#include <cstring>
#include <stdio.h>
/*
typedef char MY_TYPE;
#define FORMAT RTAUDIO_SINT8
#define SCALE 127.0
*/
typedef signed short MY_TYPE;
#define FORMAT RTAUDIO_SINT16
#define SCALE 32767.0
/*
typedef signed long MY_TYPE;
#define FORMAT RTAUDIO_SINT24
#define SCALE 8388607.0
typedef signed long MY_TYPE;
#define FORMAT RTAUDIO_SINT32
#define SCALE 2147483647.0
typedef float MY_TYPE;
#define FORMAT RTAUDIO_FLOAT32
#define SCALE 1.0;
typedef double MY_TYPE;
#define FORMAT RTAUDIO_FLOAT64
#define SCALE 1.0;
*/
// Platform-dependent sleep routines.
#if defined( __WINDOWS_ASIO__ ) || defined( __WINDOWS_DS__ )
#include <windows.h>
#define SLEEP( milliseconds ) Sleep( (DWORD) milliseconds )
#else // Unix variants
#include <unistd.h>
#define SLEEP( milliseconds ) usleep( (unsigned long) (milliseconds *
1000.0) )
#endif
void usage( void ) {
// Error function in case of incorrect command-line
// argument specifications
std::cout << "\nuseage: playraw N fs file <device> <channelOffset>\n";
std::cout << " where N = number of channels,\n";
std::cout << " fs = the sample rate, \n";
std::cout << " file = the raw file to play,\n";
std::cout << " device = optional device to use (default = 0),\n";
std::cout << " and channelOffset = an optional channel offset on
the device (default = 0).\n\n";
exit( 0 );
}
struct OutputData {
FILE *fd;
unsigned int channels;
};
// Interleaved buffers
int output( void *outputBuffer, void *inputBuffer, unsigned int
nBufferFrames,
double streamTime, RtAudioStreamStatus status, void *data )
{
OutputData *oData = (OutputData*) data;
// In general, it's not a good idea to do file input in the audio
// callback function but I'm doing it here because I don't know the
// length of the file we are reading.
unsigned int count = fread( outputBuffer, oData->channels * sizeof(
MY_TYPE ), nBufferFrames, oData->fd);
if ( count < nBufferFrames ) {
unsigned int bytes = (nBufferFrames - count) * oData->channels *
sizeof( MY_TYPE );
unsigned int startByte = count * oData->channels * sizeof( MY_TYPE );
memset( (char *)(outputBuffer)+startByte, 0, bytes );
return 1;
}
return 0;
}
int main( int argc, char *argv[] )
{
unsigned int channels, fs, bufferFrames, device = 0, offset = 0;
char *file;
// minimal command-line checking
if ( argc < 4 || argc > 6 ) usage();
RtAudio dac;
if ( dac.getDeviceCount() < 1 ) {
std::cout << "\nNo audio devices found!\n";
exit( 0 );
}
channels = (unsigned int) atoi( argv[1]) ;
fs = (unsigned int) atoi( argv[2] );
file = argv[3];
if ( argc > 4 )
device = (unsigned int) atoi( argv[4] );
if ( argc > 5 )
offset = (unsigned int) atoi( argv[5] );
// -------- original section playraw.cpp - beginning
------------------------------------
/*
OutputData data;
data.fd = fopen( file, "rb" );
if ( !data.fd ) {
std::cout << "Unable to find or open file!\n";
exit( 1 );
}
*/
// -------- original - end
--------------------------------------------------------------
// -------- replaced code - beginning
---------------------------------------------------
OutputData data;
int Size;
void *buffer;
size_t result;
data.fd = fopen ( file , "rb" );
std::cout << "\ndata.fd1 " << data.fd << std::endl;
if (data.fd==NULL) {
std::cout << "Unable to find or open file!\n";
exit (1);
}
fseek (data.fd , 0 , SEEK_END);
Size = ftell (data.fd);
buffer = calloc (Size,1);
std::cout << "\nbuffer: " << buffer << std::endl;
if (buffer == NULL) {
std::cout << "Memory error!\n";
exit (2);
}
rewind (data.fd);
result = fread (buffer,1,Size,data.fd);
std::cout << "\ndata.fd2 " << data.fd << std::endl;
if (result != Size) {
std::cout << "Reading error!\n";
exit (3);
}
// -------- replaced code - end
---------------------------------------------------------
// Set our stream parameters for output only.
bufferFrames = 512;
RtAudio::StreamParameters oParams;
oParams.deviceId = device;
oParams.nChannels = channels;
oParams.firstChannel = offset;
data.channels = channels;
try {
dac.openStream( &oParams, NULL, FORMAT, fs, &bufferFrames, &output,
(void *)&data );
dac.startStream();
}
catch ( RtError& e ) {
std::cout << '\n' << e.getMessage() << '\n' << std::endl;
goto cleanup;
}
std::cout << "\nPlaying raw file " << file << " (buffer frames = " <<
bufferFrames << ")." << std::endl;
while ( 1 ) {
SLEEP( 100 ); // wake every 100 ms to check if we're done
if ( dac.isStreamRunning() == false ) break;
}
cleanup:
fclose( data.fd );
dac.closeStream();
return 0;
}
Stephen Sinclair schrieb:
> Thomas,
>
> You've only posted file reading code, but no audio play-back code
> (RtAudio or WvOut), so I don't think I can tell you why your program
> is not playing. You'll have to post the entire code.
>
> Steve
>
> On Tue, Mar 30, 2010 at 10:48 AM, TJF <tjfoerster at web.de> wrote:
>
>> Hi,
>>
>> I cannot find the solution for my problem: I want to read an entire
>> raw-file to memory and play it. My example here is the basic playraw.cpp.
>> The problem is, that the new code (s.below the replaced code) could be
>> compiled without any problem (i.e. Win) and the program starts without
>> problem and it ends without any problems. But it ends immediately. It
>> does not play anything. If I do any SLEEP, I can see that the entire
>> file is loaded to memory, but will not be played.
>>
>> Any idea?
>>
>> Thanks a lot.
>> Regards
>> Thomas
>>
>>
>>
>> FORMAT RTAUDIO_SINT16
>>
>> // -------- original section rawplay.cpp - beginning
>> -------------------------------------------------------------------------------------------------------------
>> /*
>> OutputData data;
>> data.fd = fopen( file, "rb" );
>> if ( !data.fd ) {
>> std::cout << "Unable to find or open file!\n";
>> exit( 1 );
>> }
>> */
>> // -------- original - end
>> ---------------------------------------------------------------------------------------------------------------------
>>
>> // -------- replaced code - beginning
>> -------------------------------------------------------------------------------------------------------
>>
>> OutputData data;
>> int Size;
>> void *buffer;
>> size_t result;
>> data.fd = fopen ( file , "rb" );
>> std::cout << "\ndata.fd1 " << data.fd << std::endl;
>> if (data.fd==NULL) {
>> std::cout << "Unable to find or open file!\n";
>> exit (1);
>> }
>> fseek (data.fd , 0 , SEEK_END);
>> Size = ftell (data.fd);
>> buffer = calloc (Size,1);
>> std::cout << "\nbuffer: " << buffer << std::endl;
>> if (buffer == NULL) {
>> std::cout << "Memory error!\n";
>> exit (2);
>> }
>> rewind (data.fd);
>> result = fread (buffer,1,Size,data.fd);
>> std::cout << "\ndata.fd2 " << data.fd << std::endl;
>> if (result != Size) {
>> std::cout << "Reading error!\n";
>> exit (3);
>> }
>>
>> // -------- replaced code - end
>> -------------------------------------------------------------------------------------------------------
>>
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>> Stk at ccrma.stanford.edu
>> http://ccrma-mail.stanford.edu/mailman/listinfo/stk
>>
>>
>>
>>
>
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