110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
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/*
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* libopenmpt_bass.c
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* -----------------
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* Purpose: Example of how to use libopenmpt with the BASS audio library.
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* Notes : BASS from un4seen (http://www.un4seen.com/bass.html) is used for audio output.
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* Authors: OpenMPT Devs
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* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
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*/
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/*
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* Usage: libopenmpt_bass SOMEMODULE
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*/
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#include <stdio.h>
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#include <string.h>
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#if ( defined( _WIN32 ) || defined( WIN32 ) )
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#include <Windows.h>
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#define sleep(n) Sleep(n)
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#else
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#include <unistd.h>
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#endif
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#include <libopenmpt/libopenmpt.h>
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#include <libopenmpt/libopenmpt_stream_callbacks_file.h>
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#include <bass.h>
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#define SAMPLERATE 48000
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DWORD CALLBACK StreamProc(HSTREAM handle, void *buffer, DWORD length, void *user)
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{
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// length is in bytes, but libopenmpt wants samples => divide by number of channels (2) and size of a sample (float = 4)
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// same for return value.
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size_t count = openmpt_module_read_interleaved_float_stereo( (openmpt_module *)user, SAMPLERATE, length / (2 * sizeof(float)), (float *)buffer );
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count *= (2 * sizeof(float));
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// Reached end of stream?
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if(count < length) count |= BASS_STREAMPROC_END;
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return (DWORD)count;
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}
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#if ( defined( _WIN32 ) || defined( WIN32 ) ) && ( defined( _UNICODE ) || defined( UNICODE ) )
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int wmain( int argc, wchar_t * argv[] ) {
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#else
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int main( int argc, char * argv[] ) {
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#endif
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FILE * file = 0;
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openmpt_module * mod = 0;
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HSTREAM stream = 0;
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int result = 0;
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if ( argc != 2 ) {
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fprintf( stderr, "Usage: %s SOMEMODULE\n", argv[0] );
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return 1;
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}
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if ( HIWORD( BASS_GetVersion() ) !=BASSVERSION ) {
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fprintf( stderr, "Error: Wrong BASS version\n" );
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return 1;
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}
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if ( !BASS_Init( -1, SAMPLERATE, 0, NULL, NULL ) ) {
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fprintf( stderr, "Error: Cannot initialize BASS (error %d)\n", BASS_ErrorGetCode() );
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return 1;
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}
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#if ( defined( _WIN32 ) || defined( WIN32 ) ) && ( defined( _UNICODE ) || defined( UNICODE ) )
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if ( wcslen( argv[1] ) == 0 ) {
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fprintf( stderr, "Usage: %s SOMEMODULE\n", argv[0] );
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result = 1;
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goto fail;
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}
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file = _wfopen( argv[1], L"rb" );
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#else
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if ( strlen( argv[1] ) == 0 ) {
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fprintf( stderr, "Usage: %s SOMEMODULE\n", argv[0] );
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result = 1;
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goto fail;
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}
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file = fopen( argv[1], "rb" );
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#endif
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if ( !file ) {
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fprintf( stderr, "Error: %s\n", "fopen() failed." );
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result = 1;
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goto fail;
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}
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mod = openmpt_module_create( openmpt_stream_get_file_callbacks(), file, NULL, NULL, NULL );
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if ( !mod ) {
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fprintf( stderr, "Error: %s\n", "openmpt_module_create() failed." );
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goto fail;
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}
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// Create a "pull" channel. BASS will call StreamProc whenever the channel needs new data to be decoded.
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stream = BASS_StreamCreate(SAMPLERATE, 2, BASS_SAMPLE_FLOAT, StreamProc, mod);
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BASS_ChannelPlay(stream, FALSE);
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while ( BASS_ChannelIsActive( stream ) ) {
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// Do something useful here
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sleep(1);
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}
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BASS_StreamFree( stream );
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openmpt_module_destroy( mod );
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fail:
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BASS_Free();
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return result;
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}
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