Initial community commit

Src/external_dependencies/openmpt-trunk/contrib/libopenmpt/libopenmpt_bass.c

@@ -0,0 +1,109 @@
+/*
+ * libopenmpt_bass.c
+ * -----------------
+ * Purpose: Example of how to use libopenmpt with the BASS audio library.
+ * Notes  : BASS from un4seen (http://www.un4seen.com/bass.html) is used for audio output.
+ * Authors: OpenMPT Devs
+ * The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
+ */
+
+/*
+ * Usage: libopenmpt_bass SOMEMODULE
+ */
+
+#include <stdio.h>
+#include <string.h>
+#if ( defined( _WIN32 ) || defined( WIN32 ) )
+#include <Windows.h>
+#define sleep(n) Sleep(n)
+#else
+#include <unistd.h>
+#endif
+
+#include <libopenmpt/libopenmpt.h>
+#include <libopenmpt/libopenmpt_stream_callbacks_file.h>
+#include <bass.h>
+
+#define SAMPLERATE 48000
+
+DWORD CALLBACK StreamProc(HSTREAM handle, void *buffer, DWORD length, void *user)
+{
+	// length is in bytes, but libopenmpt wants samples => divide by number of channels (2) and size of a sample (float = 4)
+	// same for return value.
+	size_t count = openmpt_module_read_interleaved_float_stereo( (openmpt_module *)user, SAMPLERATE, length / (2 * sizeof(float)), (float *)buffer );
+	count *= (2 * sizeof(float));
+	// Reached end of stream?
+	if(count < length) count |= BASS_STREAMPROC_END;
+	return (DWORD)count;
+}
+
+
+#if ( defined( _WIN32 ) || defined( WIN32 ) ) && ( defined( _UNICODE ) || defined( UNICODE ) )
+int wmain( int argc, wchar_t * argv[] ) {
+#else
+int main( int argc, char * argv[] ) {
+#endif
+
+	FILE * file = 0;
+	openmpt_module * mod = 0;
+	HSTREAM stream = 0;
+	int result = 0;
+
+	if ( argc != 2 ) {
+		fprintf( stderr, "Usage: %s SOMEMODULE\n", argv[0] );
+		return 1;
+	}
+
+	if ( HIWORD( BASS_GetVersion() ) !=BASSVERSION ) {
+		fprintf( stderr, "Error: Wrong BASS version\n" );
+		return 1;
+	}
+
+	if ( !BASS_Init( -1, SAMPLERATE, 0, NULL, NULL ) ) {
+		fprintf( stderr, "Error: Cannot initialize BASS (error %d)\n", BASS_ErrorGetCode() );
+		return 1;
+	}
+
+#if ( defined( _WIN32 ) || defined( WIN32 ) ) && ( defined( _UNICODE ) || defined( UNICODE ) )
+	if ( wcslen( argv[1] ) == 0 ) {
+		fprintf( stderr, "Usage: %s SOMEMODULE\n", argv[0] );
+		result = 1;
+		goto fail;
+	}
+	file = _wfopen( argv[1], L"rb" );
+#else
+	if ( strlen( argv[1] ) == 0 ) {
+		fprintf( stderr, "Usage: %s SOMEMODULE\n", argv[0] );
+		result = 1;
+		goto fail;
+	}
+	file = fopen( argv[1], "rb" );
+#endif
+	if ( !file ) {
+		fprintf( stderr, "Error: %s\n", "fopen() failed." );
+		result = 1;
+		goto fail;
+	}
+
+	mod = openmpt_module_create( openmpt_stream_get_file_callbacks(), file, NULL, NULL, NULL );
+	if ( !mod ) {
+		fprintf( stderr, "Error: %s\n", "openmpt_module_create() failed." );
+		goto fail;
+	}
+	
+	// Create a "pull" channel. BASS will call StreamProc whenever the channel needs new data to be decoded.
+	stream = BASS_StreamCreate(SAMPLERATE, 2, BASS_SAMPLE_FLOAT, StreamProc, mod);
+	BASS_ChannelPlay(stream, FALSE);
+
+	while ( BASS_ChannelIsActive( stream ) ) {
+		// Do something useful here
+		sleep(1);
+	}
+
+	BASS_StreamFree( stream );
+	openmpt_module_destroy( mod );
+
+fail:
+	BASS_Free();
+	return result;
+}