C++ In_Module类代码示例

void writeSound(void)
{
	int ret = soundBufferLen;
	//int i;
	
	while (mod.outMod->CanWrite() < ((ret*sndNumChannels*(sndBitsPerSample/8))<<(mod.dsp_isactive()?1:0)))
		Sleep(50);


	mod.SAAddPCMData((char *)soundFinalWave,sndNumChannels,sndBitsPerSample,decode_pos_ms);
	mod.VSAAddPCMData((char *)soundFinalWave,sndNumChannels,sndBitsPerSample,decode_pos_ms);
	decode_pos_ms += (ret/(2*sndNumChannels) * 1000) / (float)sndSamplesPerSec;

	if (mod.dsp_isactive())
		ret=mod.dsp_dosamples((short *)soundFinalWave,ret/sndNumChannels/(sndBitsPerSample/8),sndBitsPerSample,sndNumChannels,sndSamplesPerSec)*(sndNumChannels*(sndBitsPerSample/8));
	


	//if(soundFinalWave[0]==0&&soundFinalWave[1]==0&&soundFinalWave[2]==0&&soundFinalWave[3]==0)
	//  DisplayError("%.2X%.2X%.2X%.2X - %d", soundFinalWave[0],soundFinalWave[1],soundFinalWave[2],soundFinalWave[3],ret);
	mod.outMod->Write((char *)&soundFinalWave,ret);
	

	if (seek_needed != -1)		//if a seek is initiated
	{
		mod.outMod->Flush((long)decode_pos_ms);
		
		if (seek_needed < decode_pos_ms)	//if we are asked to seek backwards.  we have to start from the beginning
		{
			GSFClose();
			GSFRun(lastfn);
			decode_pos_ms = 0;
		}
	}
}

static int play(char *fn)
{
	int song;
	int maxlatency;
	DWORD threadId;
	strcpy(current_filename_with_song, fn);
	song = extractSongNumber(fn, current_filename);
	if (!loadModule(current_filename, module, &module_len))
		return -1;
	if (!ASAP_Load(&asap, current_filename, module, module_len))
		return 1;
	if (song < 0)
		song = asap.module_info.default_song;
	duration = playSong(song);
	maxlatency = mod.outMod->Open(ASAP_SAMPLE_RATE, channels, BITS_PER_SAMPLE, -1, -1);
	if (maxlatency < 0)
		return 1;
	mod.SetInfo(BITS_PER_SAMPLE, ASAP_SAMPLE_RATE / 1000, channels, 1);
	mod.SAVSAInit(maxlatency, ASAP_SAMPLE_RATE);
	// the order of VSASetInfo's arguments in in2.h is wrong!
	// http://forums.winamp.com/showthread.php?postid=1841035
	mod.VSASetInfo(ASAP_SAMPLE_RATE, channels);
	mod.outMod->SetVolume(-666);
	seek_needed = -1;
	thread_run = TRUE;
	thread_handle = CreateThread(NULL, 0, playThread, NULL, 0, &threadId);
	if (playing_info)
		updateInfoDialog(current_filename, song);
	return thread_handle != NULL ? 0 : 1;
}

static void do_vis(char *data, int nch, int resolution, int position, unsigned samples)
{
	static char vis_buffer[SAMPLES_PER_WRITE * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS];
	char *ptr;
	int size, count;

	/*
	 * Winamp visuals may have problems accepting sample sizes larger than
	 * 16 bits, so we reduce the sample size here if necessary.
	 */

	switch(resolution) {
		case 32:
		case 24:
			size  = resolution / 8;
			count = samples * nch;
			data += size - 1;

			ptr = vis_buffer;
			while(count--) {
				*ptr++ = data[0] ^ 0x80;
				data += size;
			}

			data = vis_buffer;
			resolution = 8;
			/* fall through */
		case 16:
		case 8:
			mod_.SAAddPCMData(data, nch, resolution, position);
			mod_.VSAAddPCMData(data, nch, resolution, position);
	}
}

static int play(char *fn)
{
	char filename[MAX_PATH];
	int song;
	const ASAPInfo *info;
	int channels;
	int maxlatency;
	DWORD threadId;
	strcpy(playing_filename_with_song, fn);
	song = extractSongNumber(fn, filename);
	if (!loadModule(filename, module, &module_len))
		return -1;
	if (!ASAP_Load(asap, filename, module, module_len))
		return 1;
	info = ASAP_GetInfo(asap);
	if (song < 0)
		song = ASAPInfo_GetDefaultSong(info);
	duration = playSong(song);
	channels = ASAPInfo_GetChannels(info);
	maxlatency = mod.outMod->Open(ASAP_SAMPLE_RATE, channels, BITS_PER_SAMPLE, -1, -1);
	if (maxlatency < 0)
		return 1;
	mod.SetInfo(BITS_PER_SAMPLE, ASAP_SAMPLE_RATE / 1000, channels, 1);
	mod.SAVSAInit(maxlatency, ASAP_SAMPLE_RATE);
	// the order of VSASetInfo's arguments in in2.h is wrong!
	// http://forums.winamp.com/showthread.php?postid=1841035
	mod.VSASetInfo(ASAP_SAMPLE_RATE, channels);
	mod.outMod->SetVolume(-666);
	seek_needed = -1;
	thread_run = TRUE;
	thread_handle = CreateThread(NULL, 0, playThread, NULL, 0, &threadId);
	setPlayingSong(filename, song);
	return thread_handle != NULL ? 0 : 1;
}

static int play(char *fn)
{
	LONGLONG filesize;
	DWORD thread_id;
	int   maxlatency;
	/* checks */
	if (decoder_ == 0) return 1;
	if (!(filesize = FileSize(fn))) return -1;
	/* init decoder */
	if (!FLAC_plugin__decoder_init(decoder_, fn, filesize, &stream_data_, &flac_cfg.output))
		return 1;
	strcpy(lastfn_, fn);
	/* open output */
	maxlatency = mod_.outMod->Open(stream_data_.sample_rate, stream_data_.channels, stream_data_.output_bits_per_sample, -1, -1);
	if (maxlatency < 0)
	{
		FLAC_plugin__decoder_finish(decoder_);
		return 1;
	}
	/* set defaults */
	mod_.outMod->SetVolume(-666);
	mod_.outMod->SetPan(0);
	/* initialize vis stuff */
	mod_.SAVSAInit(maxlatency, stream_data_.sample_rate);
	mod_.VSASetInfo(stream_data_.sample_rate, stream_data_.channels);
	/* set info */
	mod_.SetInfo(stream_data_.average_bps, stream_data_.sample_rate/1000, stream_data_.channels, 1);
	/* start playing thread */
	paused = 0;
	thread_handle = CreateThread(NULL, 0, DecodeThread, NULL, 0, &thread_id);
	if (!thread_handle)	return 1;

	return 0;
}

int play(char *fn) 
{ 
	int maxlatency;
	int thread_id;

	input_file = CreateFile(fn,GENERIC_READ,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,
		OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
	if (input_file == INVALID_HANDLE_VALUE) // error opening file
	{
		return 1;
	}
	file_length=GetFileSize(input_file,NULL);

    if(IsCurrentFile)
	{
		if(!strcmp(fn,lastfn))
		{
			IsCurrentFile = TRUE;
		    SongChanged=FALSE;
		}
		else
		{
			IsCurrentFile = FALSE;
			SongChanged=TRUE;
		}

	}

	strcpy(lastfn,fn);
	paused=0;
	decode_pos_ms=0;
	seek_needed=-1;

	GSFRun(fn);

	maxlatency = mod.outMod->Open(sndSamplesPerSec,sndNumChannels,sndBitsPerSample, -1,-1);
	if (maxlatency < 0) // error opening device
	{
		CloseHandle(input_file);
		input_file=INVALID_HANDLE_VALUE;
		return 1;
	}
	// dividing by 1000 for the first parameter of setinfo makes it
	// display 'H'... for hundred.. i.e. 14H Kbps.
	mod.SetInfo((sndSamplesPerSec*sndBitsPerSample*sndNumChannels)/1000,sndSamplesPerSec/1000,sndNumChannels,1);

	// initialize vis stuff
	mod.SAVSAInit(maxlatency,sndSamplesPerSec);
	mod.VSASetInfo(sndSamplesPerSec,sndNumChannels);

	mod.outMod->SetVolume(-666); // set the output plug-ins default volume

	killDecodeThread=0;
	thread_handle = (HANDLE) CreateThread(NULL,0,(LPTHREAD_START_ROUTINE) DecodeThread,(void *) &killDecodeThread,0,&thread_id);
	
	return 0; 
}

static DWORD WINAPI DecodeThread(void *unused)
{
	const unsigned channels = stream_data_.channels;
	const unsigned bits_per_sample = stream_data_.bits_per_sample;
	const unsigned target_bps = stream_data_.output_bits_per_sample;
	const unsigned sample_rate = stream_data_.sample_rate;
	const unsigned fact = channels * (target_bps/8);

	while (stream_data_.is_playing)
	{
		/* seek needed */
		if (stream_data_.seek_to != -1)
		{
			const int pos = FLAC_plugin__seek(decoder_, &stream_data_);
			if (pos != -1) mod_.outMod->Flush(pos);
		}
		/* stream ended */
		else if (stream_data_.eof)
		{
			if (!mod_.outMod->IsPlaying())
			{
				PostMessage(mod_.hMainWindow, WM_WA_MPEG_EOF, 0, 0);
				return 0;
			}
			Sleep(10);
		}
		/* decode */
		else
		{
			/* decode samples */
			int bytes = FLAC_plugin__decode(decoder_, &stream_data_, sample_buffer_);
			const int n = bytes / fact;
			/* visualization */
			do_vis(sample_buffer_, channels, target_bps, mod_.outMod->GetWrittenTime(), n);
			/* dsp */
			if (mod_.dsp_isactive())
				bytes = mod_.dsp_dosamples((short*)sample_buffer_, n, target_bps, channels, sample_rate) * fact;
			/* output */
			while (mod_.outMod->CanWrite()<bytes && stream_data_.is_playing && stream_data_.seek_to==-1)
				Sleep(20);
			if (stream_data_.is_playing && stream_data_.seek_to==-1)
				mod_.outMod->Write(sample_buffer_, bytes);
			/* show bitrate */
			if (flac_cfg.display.show_bps)
			{
				const int rate = FLAC_plugin__get_rate(mod_.outMod->GetWrittenTime(), mod_.outMod->GetOutputTime(), &stream_data_);
				if (rate) mod_.SetInfo(rate/1000, stream_data_.sample_rate/1000, stream_data_.channels, 1);
			}
		}
	}

	return 0;
}

int play(char *fn)
{
	int maxlatency;
	int thread_id;
	HANDLE input_file = INVALID_HANDLE_VALUE;
	unsigned output_bits_per_sample;

	if(0 == decoder_) {
		return 1;
	}

	input_file = CreateFile(fn, GENERIC_READ, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
	if(input_file == INVALID_HANDLE_VALUE) {
		return -1;
	}
	CloseHandle(input_file);

	if(!safe_decoder_init_(fn, decoder_)) {
		return 1;
	}

#ifdef FLAC__DO_DITHER
	output_bits_per_sample = min(file_info_.bits_per_sample, 16);
#else
	output_bits_per_sample = file_info_.bits_per_sample;
#endif

	strcpy(lastfn_, fn);
	paused_ = 0;
	decode_pos_ms_ = 0;
	seek_needed_ = -1;
	wide_samples_in_reservoir_ = 0;

	maxlatency = mod_.outMod->Open(file_info_.sample_rate, file_info_.channels, output_bits_per_sample, -1, -1);
	if(maxlatency < 0) { /* error opening device */
		return 1;
	}

	/* dividing by 1000 for the first parameter of setinfo makes it */
	/* display 'H'... for hundred.. i.e. 14H Kbps. */
	mod_.SetInfo((file_info_.sample_rate*file_info_.bits_per_sample*file_info_.channels)/1000, file_info_.sample_rate/1000, file_info_.channels, 1);

	/* initialize vis stuff */
	mod_.SAVSAInit(maxlatency, file_info_.sample_rate);
	mod_.VSASetInfo(file_info_.sample_rate, file_info_.channels);

	mod_.outMod->SetVolume(-666); /* set the output plug-ins default volume */

	killDecodeThread = 0;
	thread_handle = (HANDLE) CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE) DecodeThread, (void *) &killDecodeThread, 0, &thread_id);

	return 0;
}

static DWORD WINAPI playThread(LPVOID dummy)
{
	while (thread_run) {
		static
#if BITS_PER_SAMPLE == 8
			byte
#else
			short
#endif
			buffer[BUFFERED_BLOCKS * 2
#if SUPPORT_EQUALIZER
			* 2
#endif
			];
		int buffered_bytes = BUFFERED_BLOCKS * channels * (BITS_PER_SAMPLE / 8);
		if (seek_needed >= 0) {
			mod.outMod->Flush(seek_needed);
			ASAP_Seek(&asap, seek_needed);
			seek_needed = -1;
		}
		if (mod.outMod->CanWrite() >= buffered_bytes
#if SUPPORT_EQUALIZER
			<< mod.dsp_isactive()
#endif
		) {
			int t;
			buffered_bytes = ASAP_Generate(&asap, buffer, buffered_bytes, BITS_PER_SAMPLE);
			if (buffered_bytes <= 0) {
				mod.outMod->CanWrite();
				if (!mod.outMod->IsPlaying()) {
					PostMessage(mod.hMainWindow, WM_WA_MPEG_EOF, 0, 0);
					return 0;
				}
				Sleep(10);
				continue;
			}
			t = mod.outMod->GetWrittenTime();
			mod.SAAddPCMData(buffer, channels, BITS_PER_SAMPLE, t);
			mod.VSAAddPCMData(buffer, channels, BITS_PER_SAMPLE, t);
#if SUPPORT_EQUALIZER
			t = buffered_bytes / (channels * (BITS_PER_SAMPLE / 8));
			t = mod.dsp_dosamples((short *) buffer, t, BITS_PER_SAMPLE, channels, ASAP_SAMPLE_RATE);
			t *= channels * (BITS_PER_SAMPLE / 8);
			mod.outMod->Write((char *) buffer, t);
#else
			mod.outMod->Write((char *) buffer, buffered_bytes);
#endif
		}
		else
			Sleep(20);
	}
	return 0;
}

void stop() { 
	if (thread_handle != INVALID_HANDLE_VALUE)
	{
		if (paused)
			unpause();
		killDecodeThread=1;
		if (WaitForSingleObject(thread_handle,5000) == WAIT_TIMEOUT)
		{
			MessageBox(mod.hMainWindow,"error asking thread to die!\n","error killing decode thread",0);
			TerminateThread(thread_handle,0);
		}
		CloseHandle(thread_handle);
		thread_handle = INVALID_HANDLE_VALUE;
	}
	if (input_file != INVALID_HANDLE_VALUE)
	{
		CloseHandle(input_file);
		input_file=INVALID_HANDLE_VALUE;
	}
	GSFClose();

	mod.outMod->Close();

	mod.SAVSADeInit();
}

// stop playing.
void stop() { 
	if (thread_handle != INVALID_HANDLE_VALUE)
	{
		killDecodeThread=1;
		if (WaitForSingleObject(thread_handle,10000) == WAIT_TIMEOUT)
		{
			MessageBox(mod.hMainWindow,"error asking thread to die!\n",
				"error killing decode thread",0);
			TerminateThread(thread_handle,0);
		}
		CloseHandle(thread_handle);
		thread_handle = INVALID_HANDLE_VALUE;
	}

	// close output system
	mod.outMod->Close();

	// deinitialize visualization
	mod.SAVSADeInit();
	

	// CHANGEME! Write your own file closing code here
	if (input_file != INVALID_HANDLE_VALUE)
	{
		CloseHandle(input_file);
		input_file=INVALID_HANDLE_VALUE;
	}

}

static void stop() {
	PostThreadMessage( self->PlayThreadID, WM_QUIT, 0, 0 );
	WaitForSingleObject( self->PlayThread, INFINITE );
	CloseHandle( self->PlayThread );
	self->PlayThread = 0;
	self->PlayThreadID = 0;
	delete self->mod;
	self->mod = 0;
	inmod.outMod->Close();
	inmod.SAVSADeInit();
}

static void stop(void)
{
	if (thread_handle != NULL) {
		thread_run = FALSE;
		// wait max 10 seconds
		if (WaitForSingleObject(thread_handle, 10 * 1000) == WAIT_TIMEOUT)
			TerminateThread(thread_handle, 0);
		CloseHandle(thread_handle);
		thread_handle = NULL;
	}
	mod.outMod->Close();
	mod.SAVSADeInit();
}

static int play( const in_char * fn ) {
	if ( !fn ) {
		return -1;
	}
	try {
		std::ifstream s( fn, std::ios::binary );
		std::map< std::string, std::string > ctls;
		ctls["seek.sync_samples"] = "1";
		self->mod = new openmpt::module( s, std::clog, ctls );
		self->cached_filename = fn;
		self->cached_title = StringDecode( self->mod->get_metadata( "title" ), CP_UTF8 );
		self->cached_length = static_cast<int>( self->mod->get_duration_seconds() * 1000.0 );
		self->cached_infotext = generate_infotext( self->cached_filename, *self->mod );
		apply_options();
		self->samplerate = self->settings.samplerate;
		self->channels = self->settings.channels;
		int maxlatency = inmod.outMod->Open( self->samplerate, self->channels, BPS, -1, -1 );
		std::ostringstream str;
		str << maxlatency;
		inmod.SetInfo( self->mod->get_num_channels(), self->samplerate/1000, self->channels, 1 );
		inmod.SAVSAInit( maxlatency, self->samplerate );
		inmod.VSASetInfo( self->channels, self->samplerate );
		inmod.outMod->SetVolume( -666 );
		inmod.outMod->SetPan( 0 );
		self->paused = false;
		self->decode_position_frames = 0;
		self->PlayThread = CreateThread( NULL, 0, DecodeThread, NULL, 0, &self->PlayThreadID );
		return 0;
	} catch ( ... ) {
		if ( self->mod ) {
			delete self->mod;
			self->mod = 0;
		}
		return -1;
	}
}

void stop()
{
	if(thread_handle != INVALID_HANDLE_VALUE) {
		killDecodeThread = 1;
		if(WaitForSingleObject(thread_handle, INFINITE) == WAIT_TIMEOUT) {
			MessageBox(mod_.hMainWindow, "error asking thread to die!\n", "error killing decode thread", 0);
			TerminateThread(thread_handle, 0);
		}
		CloseHandle(thread_handle);
		thread_handle = INVALID_HANDLE_VALUE;
	}
	safe_decoder_finish_(decoder_);

	mod_.outMod->Close();

	mod_.SAVSADeInit();
}