Exemplos de Sys_EndStreamedFile em C++ (Cpp)

Exemplo n.º 1

Arquivo: snd_dma.c Projeto: sponge/Quake-III-Arena

/*
======================
S_StartBackgroundTrack
======================
*/
void S_StartBackgroundTrack( const char *intro, const char *loop ){
	int		len;
	char	dump[16];
	char	name[MAX_QPATH];

	if ( !intro ) {
		intro = "";
	}
	if ( !loop || !loop[0] ) {
		loop = intro;
	}
	Com_DPrintf( "S_StartBackgroundTrack( %s, %s )\n", intro, loop );

	Q_strncpyz( name, intro, sizeof( name ) - 4 );
	COM_DefaultExtension( name, sizeof( name ), ".wav" );

	if ( !intro[0] ) {
		return;
	}

	Q_strncpyz( s_backgroundLoop, loop, sizeof( s_backgroundLoop ) );

	// close the background track, but DON'T reset s_rawend
	// if restarting the same back ground track
	if ( s_backgroundFile ) {
		Sys_EndStreamedFile( s_backgroundFile );
		FS_FCloseFile( s_backgroundFile );
		s_backgroundFile = 0;
	}

	//
	// open up a wav file and get all the info
	//
	FS_FOpenFileRead( name, &s_backgroundFile, qtrue );
	if ( !s_backgroundFile ) {
		Com_Printf( S_COLOR_YELLOW "WARNING: couldn't open music file %s\n", name );
		return;
	}

	// skip the riff wav header

	FS_Read(dump, 12, s_backgroundFile);

	if ( !S_FindWavChunk( s_backgroundFile, "fmt " ) ) {
		Com_Printf( "No fmt chunk in %s\n", name );
		FS_FCloseFile( s_backgroundFile );
		s_backgroundFile = 0;
		return;
	}

	// save name for soundinfo
	s_backgroundInfo.format = FGetLittleShort( s_backgroundFile );
	s_backgroundInfo.channels = FGetLittleShort( s_backgroundFile );
	s_backgroundInfo.rate = FGetLittleLong( s_backgroundFile );
	FGetLittleLong(  s_backgroundFile );
	FGetLittleShort(  s_backgroundFile );
	s_backgroundInfo.width = FGetLittleShort( s_backgroundFile ) / 8;

	if ( s_backgroundInfo.format != WAV_FORMAT_PCM ) {
		FS_FCloseFile( s_backgroundFile );
		s_backgroundFile = 0;
		Com_Printf("Not a microsoft PCM format wav: %s\n", name);
		return;
	}

	if ( s_backgroundInfo.channels != 2 || s_backgroundInfo.rate != 22050 ) {
		Com_Printf(S_COLOR_YELLOW "WARNING: music file %s is not 22k stereo\n", name );
	}

	if ( ( len = S_FindWavChunk( s_backgroundFile, "data" ) ) == 0 ) {
		FS_FCloseFile( s_backgroundFile );
		s_backgroundFile = 0;
		Com_Printf("No data chunk in %s\n", name);
		return;
	}

	s_backgroundInfo.samples = len / (s_backgroundInfo.width * s_backgroundInfo.channels);

	s_backgroundSamples = s_backgroundInfo.samples;

	//
	// start the background streaming
	//
	Sys_BeginStreamedFile( s_backgroundFile, 0x10000 );
}

Exemplo n.º 2

Arquivo: snd_dma.c Projeto: mtrencseni/quake3

/*
======================
S_UpdateBackgroundTrack
======================
*/
void S_UpdateBackgroundTrack( void ) {
	int		bufferSamples;
	int		fileSamples;
	byte	raw[30000];		// just enough to fit in a mac stack frame
	int		fileBytes;
	int		r;
	static	float	musicVolume = 0.5f;

	if ( !s_backgroundFile ) {
		return;
	}

	// graeme see if this is OK
	musicVolume = (musicVolume + (s_musicVolume->value * 2))/4.0f;

	// don't bother playing anything if musicvolume is 0
	if ( musicVolume <= 0 ) {
		return;
	}

	// see how many samples should be copied into the raw buffer
	if ( s_rawend < s_soundtime ) {
		s_rawend = s_soundtime;
	}

	while ( s_rawend < s_soundtime + MAX_RAW_SAMPLES ) {
		bufferSamples = MAX_RAW_SAMPLES - (s_rawend - s_soundtime);

		// decide how much data needs to be read from the file
		fileSamples = bufferSamples * s_backgroundInfo.rate / dma.speed;

		// don't try and read past the end of the file
		if ( fileSamples > s_backgroundSamples ) {
			fileSamples = s_backgroundSamples;
		}

		// our max buffer size
		fileBytes = fileSamples * (s_backgroundInfo.width * s_backgroundInfo.channels);
		if ( fileBytes > sizeof(raw) ) {
			fileBytes = sizeof(raw);
			fileSamples = fileBytes / (s_backgroundInfo.width * s_backgroundInfo.channels);
		}

		r = Sys_StreamedRead( raw, 1, fileBytes, s_backgroundFile );
		if ( r != fileBytes ) {
			Com_Printf("StreamedRead failure on music track\n");
			S_StopBackgroundTrack();
			return;
		}

		// byte swap if needed
		S_ByteSwapRawSamples( fileSamples, s_backgroundInfo.width, s_backgroundInfo.channels, raw );

		// add to raw buffer
		S_RawSamples( fileSamples, s_backgroundInfo.rate, 
			s_backgroundInfo.width, s_backgroundInfo.channels, raw, musicVolume );

		s_backgroundSamples -= fileSamples;
		if ( !s_backgroundSamples ) {
			// loop
			if (s_backgroundLoop[0]) {
				Sys_EndStreamedFile( s_backgroundFile );
				FS_FCloseFile( s_backgroundFile );
				s_backgroundFile = 0;
				S_StartBackgroundTrack( s_backgroundLoop, s_backgroundLoop );
				if ( !s_backgroundFile ) {
					return;		// loop failed to restart
				}
			} else {
				s_backgroundFile = 0;
				return;
			}
		}
	}
}