156 lines
4.0 KiB
C
156 lines
4.0 KiB
C
/*
|
|
* libopenmpt_example_c_pipe.c
|
|
* ---------------------------
|
|
* Purpose: libopenmpt C API simple pipe example
|
|
* Notes : This example writes raw 48000Hz / stereo / 16bit native endian PCM data to stdout.
|
|
* Authors: OpenMPT Devs
|
|
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
|
|
*/
|
|
|
|
/*
|
|
* Usage: cat SOMEMODULE | libopenmpt_example_c_pipe | aplay --file-type raw --format=dat
|
|
*/
|
|
|
|
#include <memory.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
|
|
#include <libopenmpt/libopenmpt.h>
|
|
#include <libopenmpt/libopenmpt_stream_callbacks_fd.h>
|
|
|
|
#define BUFFERSIZE 480
|
|
#define SAMPLERATE 48000
|
|
|
|
static void libopenmpt_example_logfunc( const char * message, void * userdata ) {
|
|
(void)userdata;
|
|
if ( message ) {
|
|
fprintf( stderr, "openmpt: %s\n", message );
|
|
}
|
|
}
|
|
|
|
static int libopenmpt_example_errfunc( int error, void * userdata ) {
|
|
(void)userdata;
|
|
(void)error;
|
|
return OPENMPT_ERROR_FUNC_RESULT_DEFAULT & ~OPENMPT_ERROR_FUNC_RESULT_LOG;
|
|
}
|
|
|
|
static void libopenmpt_example_print_error( const char * func_name, int mod_err, const char * mod_err_str ) {
|
|
if ( !func_name ) {
|
|
func_name = "unknown function";
|
|
}
|
|
if ( mod_err == OPENMPT_ERROR_OUT_OF_MEMORY ) {
|
|
mod_err_str = openmpt_error_string( mod_err );
|
|
if ( !mod_err_str ) {
|
|
fprintf( stderr, "Error: %s\n", "OPENMPT_ERROR_OUT_OF_MEMORY" );
|
|
} else {
|
|
fprintf( stderr, "Error: %s\n", mod_err_str );
|
|
openmpt_free_string( mod_err_str );
|
|
mod_err_str = NULL;
|
|
}
|
|
} else {
|
|
if ( !mod_err_str ) {
|
|
mod_err_str = openmpt_error_string( mod_err );
|
|
if ( !mod_err_str ) {
|
|
fprintf( stderr, "Error: %s failed.\n", func_name );
|
|
} else {
|
|
fprintf( stderr, "Error: %s failed: %s\n", func_name, mod_err_str );
|
|
}
|
|
openmpt_free_string( mod_err_str );
|
|
mod_err_str = NULL;
|
|
}
|
|
fprintf( stderr, "Error: %s failed: %s\n", func_name, mod_err_str );
|
|
}
|
|
}
|
|
|
|
static ssize_t xwrite( int fd, const void * buffer, size_t size ) {
|
|
size_t written = 0;
|
|
ssize_t retval = 0;
|
|
while ( written < size ) {
|
|
retval = write( fd, (const char *)buffer + written, size - written );
|
|
if ( retval < 0 ) {
|
|
if ( errno != EINTR ) {
|
|
break;
|
|
}
|
|
retval = 0;
|
|
}
|
|
written += retval;
|
|
}
|
|
return written;
|
|
}
|
|
|
|
static int16_t buffer[BUFFERSIZE * 2];
|
|
|
|
#if ( defined( _WIN32 ) || defined( WIN32 ) ) && ( defined( _UNICODE ) || defined( UNICODE ) )
|
|
#if defined( __clang__ ) && !defined( _MSC_VER )
|
|
int wmain( int argc, wchar_t * argv[] );
|
|
#endif
|
|
int wmain( int argc, wchar_t * argv[] ) {
|
|
#else
|
|
int main( int argc, char * argv[] ) {
|
|
#endif
|
|
|
|
int result = 0;
|
|
openmpt_module * mod = 0;
|
|
int mod_err = OPENMPT_ERROR_OK;
|
|
const char * mod_err_str = NULL;
|
|
size_t count = 0;
|
|
size_t written = 0;
|
|
(void)argv;
|
|
|
|
if ( argc != 1 ) {
|
|
fprintf( stderr, "Error: %s\n", "Wrong invocation. Use 'libopenmpt_example_c_pipe' and connect stdin and stdout." );
|
|
goto fail;
|
|
}
|
|
|
|
mod = openmpt_module_create2( openmpt_stream_get_fd_callbacks(), (void *)(uintptr_t)STDIN_FILENO, &libopenmpt_example_logfunc, NULL, &libopenmpt_example_errfunc, NULL, &mod_err, &mod_err_str, NULL );
|
|
if ( !mod ) {
|
|
libopenmpt_example_print_error( "openmpt_module_create2()", mod_err, mod_err_str );
|
|
openmpt_free_string( mod_err_str );
|
|
mod_err_str = NULL;
|
|
goto fail;
|
|
}
|
|
|
|
while ( 1 ) {
|
|
|
|
openmpt_module_error_clear( mod );
|
|
count = openmpt_module_read_interleaved_stereo( mod, SAMPLERATE, BUFFERSIZE, buffer );
|
|
mod_err = openmpt_module_error_get_last( mod );
|
|
mod_err_str = openmpt_module_error_get_last_message( mod );
|
|
if ( mod_err != OPENMPT_ERROR_OK ) {
|
|
libopenmpt_example_print_error( "openmpt_module_read_interleaved_stereo()", mod_err, mod_err_str );
|
|
openmpt_free_string( mod_err_str );
|
|
mod_err_str = NULL;
|
|
}
|
|
if ( count == 0 ) {
|
|
break;
|
|
}
|
|
|
|
written = xwrite( STDOUT_FILENO, buffer, count * 2 * sizeof( int16_t ) );
|
|
if ( written == 0 ) {
|
|
fprintf( stderr, "Error: %s\n", "write() failed." );
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
result = 0;
|
|
|
|
goto cleanup;
|
|
|
|
fail:
|
|
|
|
result = 1;
|
|
|
|
cleanup:
|
|
|
|
if ( mod ) {
|
|
openmpt_module_destroy( mod );
|
|
mod = 0;
|
|
}
|
|
|
|
return result;
|
|
}
|