src/plugin_winamp2/in_flac.c - platform/external/flac - Gitiles

 /* in_flac - Winamp2 FLAC input plugin
  * Copyright (C) 2000,2001,2002  Josh Coalson
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version 2
  * of the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */

 #include <windows.h>
 #include <mmreg.h>
 #include <msacm.h>
 #include <math.h>
 #include <stdio.h>

 #include "in2.h"
 #include "FLAC/all.h"
 #include "plugin_common/all.h"

 #ifdef max
 #undef max
 #endif
 #define max(a,b) ((a)>(b)?(a):(b))


 #define FLAC__DO_DITHER

 BOOL WINAPI _DllMainCRTStartup(HANDLE hInst, ULONG ul_reason_for_call, LPVOID lpReserved)
 {
 	return TRUE;
 }

 /* post this to the main window at end of file (after playback as stopped) */
 #define WM_WA_MPEG_EOF WM_USER+2

 typedef struct {
 	FLAC__bool abort_flag;
 	unsigned total_samples;
 	unsigned bits_per_sample;
 	unsigned channels;
 	unsigned sample_rate;
 	unsigned length_in_msec;
 } file_info_struct;

 static FLAC__bool safe_decoder_init_(const char *infilename, FLAC__FileDecoder *decoder);
 static void safe_decoder_finish_(FLAC__FileDecoder *decoder);
 static void safe_decoder_delete_(FLAC__FileDecoder *decoder);
 static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
 static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
 static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
 static void get_description_(const char *filename, char *description, unsigned max_size);

 In_Module mod_; /* the output module (declared near the bottom of this file) */
 char lastfn_[MAX_PATH]; /* currently playing file (used for getting info on the current file) */
 int decode_pos_ms_; /* current decoding position, in milliseconds */
 int paused_; /* are we paused? */
 int seek_needed_; /* if != -1, it is the point that the decode thread should seek to, in ms. */

 #define SAMPLES_PER_WRITE 576
 FLAC__int32 reservoir_[FLAC__MAX_BLOCK_SIZE * 2/*for overflow*/ * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS];
 char sample_buffer_[SAMPLES_PER_WRITE * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS * (24/8) * 2]; /* (24/8) for max bytes per sample, and 2 for who knows what */
 unsigned wide_samples_in_reservoir_;
 static file_info_struct file_info_;
 static FLAC__FileDecoder *decoder_;

 int killDecodeThread = 0;					/* the kill switch for the decode thread */
 HANDLE thread_handle = INVALID_HANDLE_VALUE;	/* the handle to the decode thread */

 DWORD WINAPI __stdcall DecodeThread(void *b); /* the decode thread procedure */


 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;

 			ptr = vis_buffer;
 			while(count--) {
 				data += size;
 				*ptr++ = data[-1] ^ 0x80;
 			}

 			data = vis_buffer;
 			resolution = 8;

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

 void config(HWND hwndParent)
 {
 	MessageBox(hwndParent, "No configuration.", "Configuration", MB_OK);
 	/* if we had a configuration we'd want to write it here :) */
 }
 void about(HWND hwndParent)
 {
 	MessageBox(hwndParent, "Winamp FLAC Plugin v" VERSION ", by Josh Coalson\nSee http://flac.sourceforge.net/", "About FLAC Plugin", MB_OK);
 }

 void init()
 {
 	decoder_ = FLAC__file_decoder_new();
 	strcpy(lastfn_, "");
 }

 void quit()
 {
 	safe_decoder_delete_(decoder_);
 	decoder_ = 0;
 }

 int isourfile(char *fn) { return 0; }
 /* used for detecting URL streams.. unused here. strncmp(fn, "http://", 7) to detect HTTP streams, etc */

 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;
 }

 void pause()
 {
 	paused_ = 1;
 	mod_.outMod->Pause(1);
 }

 void unpause()
 {
 	paused_ = 0;
 	mod_.outMod->Pause(0);
 }

 int ispaused()
 {
 	return paused_;
 }

 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();
 }

 int getlength()
 {
 	return (int)file_info_.length_in_msec;
 }

 int getoutputtime()
 {
 	return decode_pos_ms_ + (mod_.outMod->GetOutputTime() - mod_.outMod->GetWrittenTime());
 }

 void setoutputtime(int time_in_ms)
 {
 	seek_needed_ = time_in_ms;
 }

 void setvolume(int volume) { mod_.outMod->SetVolume(volume); }
 void setpan(int pan) { mod_.outMod->SetPan(pan); }

 int infoDlg(char *fn, HWND hwnd)
 {
 	/* @@@TODO: implement info dialog. */
 	return 0;
 }

 void getfileinfo(char *filename, char *title, int *length_in_msec)
 {
 	FLAC__StreamMetadata streaminfo;

 	if(0 == filename || filename[0] == '\0') {
 		filename = lastfn_;
 		if(length_in_msec) {
 			*length_in_msec = getlength();
 			length_in_msec = 0; /* force skip in following code */
 		}
 	}

 	if(!FLAC__metadata_get_streaminfo(filename, &streaminfo)) {
 		MessageBox(mod_.hMainWindow, filename, "ERROR: invalid/missing FLAC metadata", 0);
 		if(title) {
 			static const char *errtitle = "Invalid FLAC File: ";
 			sprintf(title, "%s\"%s\"", errtitle, filename);
 		}
 		if(length_in_msec)
 			*length_in_msec = -1;
 		return;
 	}

 	if(title) {
 		get_description_(filename, title, MAX_PATH);
 	}
 	if(length_in_msec)
 		*length_in_msec = (int)(streaminfo.data.stream_info.total_samples * 10 / (streaminfo.data.stream_info.sample_rate / 100));
 }

 void eq_set(int on, char data[10], int preamp)
 {
 }

 DWORD WINAPI __stdcall DecodeThread(void *b)
 {
 	int done = 0;

 	while(! *((int *)b) ) {
 		const unsigned channels = file_info_.channels;
 		const unsigned bits_per_sample = file_info_.bits_per_sample;
 #ifdef FLAC__DO_DITHER
 		const unsigned target_bps = min(bits_per_sample, 16);
 #else
 		const unsigned target_bps = bits_per_sample;
 #endif
 		const unsigned sample_rate = file_info_.sample_rate;
 		if(seek_needed_ != -1) {
 			const double distance = (double)seek_needed_ / (double)getlength();
 			const unsigned target_sample = (unsigned)(distance * (double)file_info_.total_samples);
 			if(FLAC__file_decoder_seek_absolute(decoder_, (FLAC__uint64)target_sample)) {
 				decode_pos_ms_ = (int)(distance * (double)getlength());
 				seek_needed_ = -1;
 				done = 0;
 				mod_.outMod->Flush(decode_pos_ms_);
 			}
 		}
 		if(done) {
 			if(!mod_.outMod->IsPlaying()) {
 				PostMessage(mod_.hMainWindow, WM_WA_MPEG_EOF, 0, 0);
 				return 0;
 			}
 			Sleep(10);
 		}
 		else if(mod_.outMod->CanWrite() >= ((int)(SAMPLES_PER_WRITE*channels*((target_bps+7)/8)) << (mod_.dsp_isactive()?1:0))) {
 			while(wide_samples_in_reservoir_ < SAMPLES_PER_WRITE) {
 				if(FLAC__file_decoder_get_state(decoder_) == FLAC__FILE_DECODER_END_OF_FILE) {
 					done = 1;
 					break;
 				}
 				else if(!FLAC__file_decoder_process_single(decoder_)) {
 					MessageBox(mod_.hMainWindow, FLAC__FileDecoderStateString[FLAC__file_decoder_get_state(decoder_)], "READ ERROR processing frame", 0);
 					done = 1;
 					break;
 				}
 			}

 			if(wide_samples_in_reservoir_ == 0) {
 				done = 1;
 			}
 			else {
 				const unsigned n = min(wide_samples_in_reservoir_, SAMPLES_PER_WRITE);
 				const unsigned delta = n * channels;
 				int bytes = (int)FLAC__plugin_common__pack_pcm_signed_little_endian(sample_buffer_, reservoir_, n, channels, bits_per_sample, target_bps);
 				unsigned i;

 				for(i = delta; i < wide_samples_in_reservoir_ * channels; i++)
 					reservoir_[i-delta] = reservoir_[i];
 				wide_samples_in_reservoir_ -= n;

 				do_vis((char *)sample_buffer_, channels, target_bps, decode_pos_ms_, n);
 				decode_pos_ms_ += (n*1000 + sample_rate/2)/sample_rate;
 				if(mod_.dsp_isactive())
 					bytes = mod_.dsp_dosamples((short *)sample_buffer_, n, target_bps, channels, sample_rate) * (channels*target_bps/8);
 				mod_.outMod->Write(sample_buffer_, bytes);
 			}
 		}
 		else Sleep(20);
 	}
 	return 0;
 }


 In_Module mod_ =
 {
 	IN_VER,
 	"Reference FLAC Player v" VERSION,
 	0,	/* hMainWindow */
 	0,  /* hDllInstance */
 	"FLAC\0FLAC Audio File (*.FLAC)\0"
 	,
 	1,	/* is_seekable */
 	1, /* uses output */
 	config,
 	about,
 	init,
 	quit,
 	getfileinfo,
 	infoDlg,
 	isourfile,
 	play,
 	pause,
 	unpause,
 	ispaused,
 	stop,

 	getlength,
 	getoutputtime,
 	setoutputtime,

 	setvolume,
 	setpan,

 	0,0,0,0,0,0,0,0,0, /* vis stuff */


 	0,0, /* dsp */

 	eq_set,

 	NULL,		/* setinfo */

 	0 /* out_mod */

 };

 __declspec( dllexport ) In_Module * winampGetInModule2()
 {
 	return &mod_;
 }


 /***********************************************************************
  * local routines
  **********************************************************************/
 FLAC__bool safe_decoder_init_(const char *filename, FLAC__FileDecoder *decoder)
 {
 	if(decoder == 0) {
 		MessageBox(mod_.hMainWindow, "Decoder instance is NULL", "ERROR initializing decoder", 0);
 		return false;
 	}

 	safe_decoder_finish_(decoder);

 	FLAC__file_decoder_set_md5_checking(decoder, false);
 	FLAC__file_decoder_set_filename(decoder, filename);
 	FLAC__file_decoder_set_write_callback(decoder, write_callback_);
 	FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback_);
 	FLAC__file_decoder_set_error_callback(decoder, error_callback_);
 	FLAC__file_decoder_set_client_data(decoder, &file_info_);
 	if(FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK) {
 		MessageBox(mod_.hMainWindow, FLAC__FileDecoderStateString[FLAC__file_decoder_get_state(decoder)], "ERROR initializing decoder", 0);
 		return false;
 	}

 	file_info_.abort_flag = false;
 	if(!FLAC__file_decoder_process_until_end_of_metadata(decoder)) {
 		MessageBox(mod_.hMainWindow, FLAC__FileDecoderStateString[FLAC__file_decoder_get_state(decoder)], "ERROR processing metadata", 0);
 		return false;
 	}

 	if(file_info_.abort_flag) {
 		/* metadata callback already popped up the error dialog */
 		return false;
 	}

 	return true;
 }

 void safe_decoder_finish_(FLAC__FileDecoder *decoder)
 {
 	if(decoder && FLAC__file_decoder_get_state(decoder) != FLAC__FILE_DECODER_UNINITIALIZED)
 		FLAC__file_decoder_finish(decoder);
 }

 void safe_decoder_delete_(FLAC__FileDecoder *decoder)
 {
 	if(decoder) {
 		safe_decoder_finish_(decoder);
 		FLAC__file_decoder_delete(decoder);
 	}
 }

 FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
 {
 	file_info_struct *file_info = (file_info_struct *)client_data;
 	const unsigned channels = file_info->channels, wide_samples = frame->header.blocksize;
 	unsigned wide_sample, offset_sample, channel;

 	(void)decoder;

 	if(file_info->abort_flag)
 		return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;

 	for(offset_sample = wide_samples_in_reservoir_ * channels, wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 		for(channel = 0; channel < channels; channel++, offset_sample++)
 			reservoir_[offset_sample] = buffer[channel][wide_sample];

 	wide_samples_in_reservoir_ += wide_samples;

 	return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
 }

 void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
 {
 	file_info_struct *file_info = (file_info_struct *)client_data;
 	(void)decoder;
 	if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) {
 		FLAC__ASSERT(metadata->data.stream_info.total_samples < 0x100000000); /* this plugin can only handle < 4 gigasamples */
 		file_info->total_samples = (unsigned)(metadata->data.stream_info.total_samples&0xffffffff);
 		file_info->bits_per_sample = metadata->data.stream_info.bits_per_sample;
 		file_info->channels = metadata->data.stream_info.channels;
 		file_info->sample_rate = metadata->data.stream_info.sample_rate;

 #ifdef FLAC__DO_DITHER
 		if(file_info->bits_per_sample != 8 && file_info->bits_per_sample != 16 && file_info->bits_per_sample != 24) {
 			MessageBox(mod_.hMainWindow, "ERROR: plugin can only handle 8/16/24-bit samples\n", "ERROR: plugin can only handle 8/16/24-bit samples", 0);
 			file_info->abort_flag = true;
 			return;
 		}
 #else
 		if(file_info->bits_per_sample != 8 && file_info->bits_per_sample != 16 && file_info->bits_per_sample != 24) {
 			MessageBox(mod_.hMainWindow, "ERROR: plugin can only handle 8/16/24-bit samples\n", "ERROR: plugin can only handle 8/16/24-bit samples", 0);
 			file_info->abort_flag = true;
 			return;
 		}
 #endif
 		file_info->length_in_msec = file_info->total_samples * 10 / (file_info->sample_rate / 100);
 	}
 }

 void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
 {
 	file_info_struct *file_info = (file_info_struct *)client_data;
 	(void)decoder;
 	if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
 		file_info->abort_flag = true;
 }

 static FLAC__bool local__is_blank(const char *s)
 {
 	return 0 == s || *s == '\0';
 }

 void get_description_(const char *filename, char *description, unsigned max_size)
 {
 	FLAC_Plugin__CanonicalTag tag;

 	FLAC_plugin__canonical_tag_init(&tag);
 	FLAC_plugin__canonical_tag_get_combined(filename, &tag);

 	/* @@@ when config window is done, add code here for converting to user charset ala plugin_xmms */

 	if(local__is_blank(tag.performer) && local__is_blank(tag.composer) && local__is_blank(tag.title)) {
 		/* set the description to the filename */
 		char *p;
 		const char *temp = strrchr(filename, '\\');
 		if(0 == temp)
 			temp = strrchr(filename, '/');
 		if(0 == temp)
 			temp = filename;
 		else
 			temp++;
 		strncpy(description, temp, max_size);
 		description[max_size-1] = '\0';
 		if(0 != (p = strrchr(description, '.')))
 			*p = '\0';
 	}
 	else {
 		char *artist = !local__is_blank(tag.performer)? tag.performer : !local__is_blank(tag.composer)? tag.composer : "Unknown Artist";
 		char *title = !local__is_blank(tag.title)? tag.title : "Untitled";

 		/* there's no snprintf in VC6 so we get sloppy */
 #if 0
 		snprintf(description, max_size, "%s - %s", artist, title);
 #else
 		const unsigned needed = strlen(artist) + strlen(title) + 3 + 1;
 		if(needed <= max_size)
 			sprintf(description, "%s - %s", artist, title);
 		else {
 			char *p = malloc(needed);
 			if(0 != p) {
 				sprintf(p, "%s - %s", artist, title);
 				p[max_size-1] = '\0';
 				strcpy(description, p);
 			}
 		}
 #endif
 	}

 	FLAC_plugin__canonical_tag_clear(&tag);
 }
	/* in_flac - Winamp2 FLAC input plugin
	* Copyright (C) 2000,2001,2002 Josh Coalson
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* as published by the Free Software Foundation; either version 2
	* of the License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	*/

	#include <windows.h>
	#include <mmreg.h>
	#include <msacm.h>
	#include <math.h>
	#include <stdio.h>

	#include "in2.h"
	#include "FLAC/all.h"
	#include "plugin_common/all.h"

	#ifdef max
	#undef max
	#endif
	#define max(a,b) ((a)>(b)?(a):(b))


	#define FLAC__DO_DITHER

	BOOL WINAPI _DllMainCRTStartup(HANDLE hInst, ULONG ul_reason_for_call, LPVOID lpReserved)
	{
	return TRUE;
	}

	/* post this to the main window at end of file (after playback as stopped) */
	#define WM_WA_MPEG_EOF WM_USER+2

	typedef struct {
	FLAC__bool abort_flag;
	unsigned total_samples;
	unsigned bits_per_sample;
	unsigned channels;
	unsigned sample_rate;
	unsigned length_in_msec;
	} file_info_struct;

	static FLAC__bool safe_decoder_init_(const char infilename, FLAC__FileDecoder decoder);
	static void safe_decoder_finish_(FLAC__FileDecoder *decoder);
	static void safe_decoder_delete_(FLAC__FileDecoder *decoder);
	static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder decoder, const FLAC__Frame frame, const FLAC__int32 * const buffer[], void *client_data);
	static void metadata_callback_(const FLAC__FileDecoder decoder, const FLAC__StreamMetadata metadata, void *client_data);
	static void error_callback_(const FLAC__FileDecoder decoder, FLAC__StreamDecoderErrorStatus status, void client_data);
	static void get_description_(const char filename, char description, unsigned max_size);

	In_Module mod_; /* the output module (declared near the bottom of this file) */
	char lastfn_[MAX_PATH]; /* currently playing file (used for getting info on the current file) */
	int decode_pos_ms_; /* current decoding position, in milliseconds */
	int paused_; /* are we paused? */
	int seek_needed_; /* if != -1, it is the point that the decode thread should seek to, in ms. */

	#define SAMPLES_PER_WRITE 576
	FLAC__int32 reservoir_[FLAC__MAX_BLOCK_SIZE * 2/for overflow/ * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS];
	char sample_buffer_[SAMPLES_PER_WRITE * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS * (24/8) * 2]; /* (24/8) for max bytes per sample, and 2 for who knows what */
	unsigned wide_samples_in_reservoir_;
	static file_info_struct file_info_;
	static FLAC__FileDecoder *decoder_;

	int killDecodeThread = 0; /* the kill switch for the decode thread */
	HANDLE thread_handle = INVALID_HANDLE_VALUE; /* the handle to the decode thread */

	DWORD WINAPI __stdcall DecodeThread(void b); / the decode thread procedure */


	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;

	ptr = vis_buffer;
	while(count--) {
	data += size;
	*ptr++ = data[-1] ^ 0x80;
	}

	data = vis_buffer;
	resolution = 8;

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

	void config(HWND hwndParent)
	{
	MessageBox(hwndParent, "No configuration.", "Configuration", MB_OK);
	/* if we had a configuration we'd want to write it here :) */
	}
	void about(HWND hwndParent)
	{
	MessageBox(hwndParent, "Winamp FLAC Plugin v" VERSION ", by Josh Coalson\nSee http://flac.sourceforge.net/", "About FLAC Plugin", MB_OK);
	}

	void init()
	{
	decoder_ = FLAC__file_decoder_new();
	strcpy(lastfn_, "");
	}

	void quit()
	{
	safe_decoder_delete_(decoder_);
	decoder_ = 0;
	}

	int isourfile(char *fn) { return 0; }
	/* used for detecting URL streams.. unused here. strncmp(fn, "http://", 7) to detect HTTP streams, etc */

	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_ratefile_info_.bits_per_samplefile_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;
	}

	void pause()
	{
	paused_ = 1;
	mod_.outMod->Pause(1);
	}

	void unpause()
	{
	paused_ = 0;
	mod_.outMod->Pause(0);
	}

	int ispaused()
	{
	return paused_;
	}

	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();
	}

	int getlength()
	{
	return (int)file_info_.length_in_msec;
	}

	int getoutputtime()
	{
	return decode_pos_ms_ + (mod_.outMod->GetOutputTime() - mod_.outMod->GetWrittenTime());
	}

	void setoutputtime(int time_in_ms)
	{
	seek_needed_ = time_in_ms;
	}

	void setvolume(int volume) { mod_.outMod->SetVolume(volume); }
	void setpan(int pan) { mod_.outMod->SetPan(pan); }

	int infoDlg(char *fn, HWND hwnd)
	{
	/* @@@TODO: implement info dialog. */
	return 0;
	}

	void getfileinfo(char filename, char title, int *length_in_msec)
	{
	FLAC__StreamMetadata streaminfo;

	if(0 == filename \|\| filename[0] == '\0') {
	filename = lastfn_;
	if(length_in_msec) {
	*length_in_msec = getlength();
	length_in_msec = 0; /* force skip in following code */
	}
	}

	if(!FLAC__metadata_get_streaminfo(filename, &streaminfo)) {
	MessageBox(mod_.hMainWindow, filename, "ERROR: invalid/missing FLAC metadata", 0);
	if(title) {
	static const char *errtitle = "Invalid FLAC File: ";
	sprintf(title, "%s\"%s\"", errtitle, filename);
	}
	if(length_in_msec)
	*length_in_msec = -1;
	return;
	}

	if(title) {
	get_description_(filename, title, MAX_PATH);
	}
	if(length_in_msec)
	length_in_msec = (int)(streaminfo.data.stream_info.total_samples 10 / (streaminfo.data.stream_info.sample_rate / 100));
	}

	void eq_set(int on, char data[10], int preamp)
	{
	}

	DWORD WINAPI __stdcall DecodeThread(void *b)
	{
	int done = 0;

	while(! ((int )b) ) {
	const unsigned channels = file_info_.channels;
	const unsigned bits_per_sample = file_info_.bits_per_sample;
	#ifdef FLAC__DO_DITHER
	const unsigned target_bps = min(bits_per_sample, 16);
	#else
	const unsigned target_bps = bits_per_sample;
	#endif
	const unsigned sample_rate = file_info_.sample_rate;
	if(seek_needed_ != -1) {
	const double distance = (double)seek_needed_ / (double)getlength();
	const unsigned target_sample = (unsigned)(distance * (double)file_info_.total_samples);
	if(FLAC__file_decoder_seek_absolute(decoder_, (FLAC__uint64)target_sample)) {
	decode_pos_ms_ = (int)(distance * (double)getlength());
	seek_needed_ = -1;
	done = 0;
	mod_.outMod->Flush(decode_pos_ms_);
	}
	}
	if(done) {
	if(!mod_.outMod->IsPlaying()) {
	PostMessage(mod_.hMainWindow, WM_WA_MPEG_EOF, 0, 0);
	return 0;
	}
	Sleep(10);
	}
	else if(mod_.outMod->CanWrite() >= ((int)(SAMPLES_PER_WRITEchannels((target_bps+7)/8)) << (mod_.dsp_isactive()?1:0))) {
	while(wide_samples_in_reservoir_ < SAMPLES_PER_WRITE) {
	if(FLAC__file_decoder_get_state(decoder_) == FLAC__FILE_DECODER_END_OF_FILE) {
	done = 1;
	break;
	}
	else if(!FLAC__file_decoder_process_single(decoder_)) {
	MessageBox(mod_.hMainWindow, FLAC__FileDecoderStateString[FLAC__file_decoder_get_state(decoder_)], "READ ERROR processing frame", 0);
	done = 1;
	break;
	}
	}

	if(wide_samples_in_reservoir_ == 0) {
	done = 1;
	}
	else {
	const unsigned n = min(wide_samples_in_reservoir_, SAMPLES_PER_WRITE);
	const unsigned delta = n * channels;
	int bytes = (int)FLAC__plugin_common__pack_pcm_signed_little_endian(sample_buffer_, reservoir_, n, channels, bits_per_sample, target_bps);
	unsigned i;

	for(i = delta; i < wide_samples_in_reservoir_ * channels; i++)
	reservoir_[i-delta] = reservoir_[i];
	wide_samples_in_reservoir_ -= n;

	do_vis((char *)sample_buffer_, channels, target_bps, decode_pos_ms_, n);
	decode_pos_ms_ += (n*1000 + sample_rate/2)/sample_rate;
	if(mod_.dsp_isactive())
	bytes = mod_.dsp_dosamples((short )sample_buffer_, n, target_bps, channels, sample_rate) (channels*target_bps/8);
	mod_.outMod->Write(sample_buffer_, bytes);
	}
	}
	else Sleep(20);
	}
	return 0;
	}



	In_Module mod_ =
	{
	IN_VER,
	"Reference FLAC Player v" VERSION,
	0, /* hMainWindow */
	0, /* hDllInstance */
	"FLAC\0FLAC Audio File (*.FLAC)\0"
	,
	1, /* is_seekable */
	1, /* uses output */
	config,
	about,
	init,
	quit,
	getfileinfo,
	infoDlg,
	isourfile,
	play,
	pause,
	unpause,
	ispaused,
	stop,

	getlength,
	getoutputtime,
	setoutputtime,

	setvolume,
	setpan,

	0,0,0,0,0,0,0,0,0, /* vis stuff */


	0,0, /* dsp */

	eq_set,

	NULL, /* setinfo */

	0 /* out_mod */

	};

	__declspec( dllexport ) In_Module * winampGetInModule2()
	{
	return &mod_;
	}


	/***********************************************************************
	* local routines
	**********************************************************************/
	FLAC__bool safe_decoder_init_(const char filename, FLAC__FileDecoder decoder)
	{
	if(decoder == 0) {
	MessageBox(mod_.hMainWindow, "Decoder instance is NULL", "ERROR initializing decoder", 0);
	return false;
	}

	safe_decoder_finish_(decoder);

	FLAC__file_decoder_set_md5_checking(decoder, false);
	FLAC__file_decoder_set_filename(decoder, filename);
	FLAC__file_decoder_set_write_callback(decoder, write_callback_);
	FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback_);
	FLAC__file_decoder_set_error_callback(decoder, error_callback_);
	FLAC__file_decoder_set_client_data(decoder, &file_info_);
	if(FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK) {
	MessageBox(mod_.hMainWindow, FLAC__FileDecoderStateString[FLAC__file_decoder_get_state(decoder)], "ERROR initializing decoder", 0);
	return false;
	}

	file_info_.abort_flag = false;
	if(!FLAC__file_decoder_process_until_end_of_metadata(decoder)) {
	MessageBox(mod_.hMainWindow, FLAC__FileDecoderStateString[FLAC__file_decoder_get_state(decoder)], "ERROR processing metadata", 0);
	return false;
	}

	if(file_info_.abort_flag) {
	/* metadata callback already popped up the error dialog */
	return false;
	}

	return true;
	}

	void safe_decoder_finish_(FLAC__FileDecoder *decoder)
	{
	if(decoder && FLAC__file_decoder_get_state(decoder) != FLAC__FILE_DECODER_UNINITIALIZED)
	FLAC__file_decoder_finish(decoder);
	}

	void safe_decoder_delete_(FLAC__FileDecoder *decoder)
	{
	if(decoder) {
	safe_decoder_finish_(decoder);
	FLAC__file_decoder_delete(decoder);
	}
	}

	FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder decoder, const FLAC__Frame frame, const FLAC__int32 * const buffer[], void *client_data)
	{
	file_info_struct file_info = (file_info_struct )client_data;
	const unsigned channels = file_info->channels, wide_samples = frame->header.blocksize;
	unsigned wide_sample, offset_sample, channel;

	(void)decoder;

	if(file_info->abort_flag)
	return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;

	for(offset_sample = wide_samples_in_reservoir_ * channels, wide_sample = 0; wide_sample < wide_samples; wide_sample++)
	for(channel = 0; channel < channels; channel++, offset_sample++)
	reservoir_[offset_sample] = buffer[channel][wide_sample];

	wide_samples_in_reservoir_ += wide_samples;

	return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
	}

	void metadata_callback_(const FLAC__FileDecoder decoder, const FLAC__StreamMetadata metadata, void *client_data)
	{
	file_info_struct file_info = (file_info_struct )client_data;
	(void)decoder;
	if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) {
	FLAC__ASSERT(metadata->data.stream_info.total_samples < 0x100000000); /* this plugin can only handle < 4 gigasamples */
	file_info->total_samples = (unsigned)(metadata->data.stream_info.total_samples&0xffffffff);
	file_info->bits_per_sample = metadata->data.stream_info.bits_per_sample;
	file_info->channels = metadata->data.stream_info.channels;
	file_info->sample_rate = metadata->data.stream_info.sample_rate;

	#ifdef FLAC__DO_DITHER
	if(file_info->bits_per_sample != 8 && file_info->bits_per_sample != 16 && file_info->bits_per_sample != 24) {
	MessageBox(mod_.hMainWindow, "ERROR: plugin can only handle 8/16/24-bit samples\n", "ERROR: plugin can only handle 8/16/24-bit samples", 0);
	file_info->abort_flag = true;
	return;
	}
	#else
	if(file_info->bits_per_sample != 8 && file_info->bits_per_sample != 16 && file_info->bits_per_sample != 24) {
	MessageBox(mod_.hMainWindow, "ERROR: plugin can only handle 8/16/24-bit samples\n", "ERROR: plugin can only handle 8/16/24-bit samples", 0);
	file_info->abort_flag = true;
	return;
	}
	#endif
	file_info->length_in_msec = file_info->total_samples * 10 / (file_info->sample_rate / 100);
	}
	}

	void error_callback_(const FLAC__FileDecoder decoder, FLAC__StreamDecoderErrorStatus status, void client_data)
	{
	file_info_struct file_info = (file_info_struct )client_data;
	(void)decoder;
	if(status != FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC)
	file_info->abort_flag = true;
	}

	static FLAC__bool local__is_blank(const char *s)
	{
	return 0 == s \|\| *s == '\0';
	}

	void get_description_(const char filename, char description, unsigned max_size)
	{
	FLAC_Plugin__CanonicalTag tag;

	FLAC_plugin__canonical_tag_init(&tag);
	FLAC_plugin__canonical_tag_get_combined(filename, &tag);

	/* @@@ when config window is done, add code here for converting to user charset ala plugin_xmms */

	if(local__is_blank(tag.performer) && local__is_blank(tag.composer) && local__is_blank(tag.title)) {
	/* set the description to the filename */
	char *p;
	const char *temp = strrchr(filename, '\\');
	if(0 == temp)
	temp = strrchr(filename, '/');
	if(0 == temp)
	temp = filename;
	else
	temp++;
	strncpy(description, temp, max_size);
	description[max_size-1] = '\0';
	if(0 != (p = strrchr(description, '.')))
	*p = '\0';
	}
	else {
	char *artist = !local__is_blank(tag.performer)? tag.performer : !local__is_blank(tag.composer)? tag.composer : "Unknown Artist";
	char *title = !local__is_blank(tag.title)? tag.title : "Untitled";

	/* there's no snprintf in VC6 so we get sloppy */
	#if 0
	snprintf(description, max_size, "%s - %s", artist, title);
	#else
	const unsigned needed = strlen(artist) + strlen(title) + 3 + 1;
	if(needed <= max_size)
	sprintf(description, "%s - %s", artist, title);
	else {
	char *p = malloc(needed);
	if(0 != p) {
	sprintf(p, "%s - %s", artist, title);
	p[max_size-1] = '\0';
	strcpy(description, p);
	}
	}
	#endif
	}

	FLAC_plugin__canonical_tag_clear(&tag);
	}