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/*
* libopenmpt_example_c.c
* ----------------------
* Purpose: libopenmpt C API example
* Notes : PortAudio is used for sound output.
* Authors: OpenMPT Devs
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
*/
/*
* Usage: libopenmpt_example_c SOMEMODULE
*/
#include <memory.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libopenmpt/libopenmpt.h>
#include <libopenmpt/libopenmpt_stream_callbacks_file.h>
#include <portaudio.h>
#define BUFFERSIZE 480
#define SAMPLERATE 48000
static int16_t left[BUFFERSIZE];
static int16_t right[BUFFERSIZE];
static int16_t * const buffers[2] = { left, right };
static int16_t interleaved_buffer[BUFFERSIZE * 2];
static int is_interleaved = 0;
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 );
}
}
#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;
FILE * file = 0;
openmpt_module * mod = 0;
int mod_err = OPENMPT_ERROR_OK;
const char * mod_err_str = NULL;
size_t count = 0;
PaError pa_error = paNoError;
int pa_initialized = 0;
PaStream * stream = 0;
if ( argc != 2 ) {
fprintf( stderr, "Error: %s\n", "Wrong invocation. Use 'libopenmpt_example_c SOMEMODULE'." );
goto fail;
}
#if ( defined( _WIN32 ) || defined( WIN32 ) ) && ( defined( _UNICODE ) || defined( UNICODE ) )
if ( wcslen( argv[1] ) == 0 ) {
fprintf( stderr, "Error: %s\n", "Wrong invocation. Use 'libopenmpt_example_c SOMEMODULE'." );
goto fail;
}
file = _wfopen( argv[1], L"rb" );
#else
if ( strlen( argv[1] ) == 0 ) {
fprintf( stderr, "Error: %s\n", "Wrong invocation. Use 'libopenmpt_example_c SOMEMODULE'." );
goto fail;
}
file = fopen( argv[1], "rb" );
#endif
if ( !file ) {
fprintf( stderr, "Error: %s\n", "fopen() failed." );
goto fail;
}
mod = openmpt_module_create2( openmpt_stream_get_file_callbacks(), file, &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;
}
openmpt_module_set_error_func( mod, NULL, NULL );
pa_error = Pa_Initialize();
if ( pa_error != paNoError ) {
fprintf( stderr, "Error: %s\n", "Pa_Initialize() failed." );
goto fail;
}
pa_initialized = 1;
pa_error = Pa_OpenDefaultStream( &stream, 0, 2, paInt16 | paNonInterleaved, SAMPLERATE, paFramesPerBufferUnspecified, NULL, NULL );
if ( pa_error == paSampleFormatNotSupported ) {
is_interleaved = 1;
pa_error = Pa_OpenDefaultStream( &stream, 0, 2, paInt16, SAMPLERATE, paFramesPerBufferUnspecified, NULL, NULL );
}
if ( pa_error != paNoError ) {
fprintf( stderr, "Error: %s\n", "Pa_OpenStream() failed." );
goto fail;
}
if ( !stream ) {
fprintf( stderr, "Error: %s\n", "Pa_OpenStream() failed." );
goto fail;
}
pa_error = Pa_StartStream( stream );
if ( pa_error != paNoError ) {
fprintf( stderr, "Error: %s\n", "Pa_StartStream() failed." );
goto fail;
}
while ( 1 ) {
openmpt_module_error_clear( mod );
count = is_interleaved ? openmpt_module_read_interleaved_stereo( mod, SAMPLERATE, BUFFERSIZE, interleaved_buffer ) : openmpt_module_read_stereo( mod, SAMPLERATE, BUFFERSIZE, left, right );
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_stereo()", mod_err, mod_err_str );
openmpt_free_string( mod_err_str );
mod_err_str = NULL;
}
if ( count == 0 ) {
break;
}
pa_error = is_interleaved ? Pa_WriteStream( stream, interleaved_buffer, (unsigned long)count ) : Pa_WriteStream( stream, buffers, (unsigned long)count );
if ( pa_error == paOutputUnderflowed ) {
pa_error = paNoError;
}
if ( pa_error != paNoError ) {
fprintf( stderr, "Error: %s\n", "Pa_WriteStream() failed." );
goto fail;
}
}
result = 0;
goto cleanup;
fail:
result = 1;
cleanup:
if ( stream ) {
if ( Pa_IsStreamActive( stream ) == 1 ) {
Pa_StopStream( stream );
}
Pa_CloseStream( stream );
stream = 0;
}
if ( pa_initialized ) {
Pa_Terminate();
pa_initialized = 0;
(void)pa_initialized;
}
if ( mod ) {
openmpt_module_destroy( mod );
mod = 0;
}
if ( file ) {
fclose( file );
file = 0;
}
return result;
}
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