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428 lines
12 KiB
C
428 lines
12 KiB
C
/* in_flac - Winamp FLAC input plugin
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* Copyright (C) 2000 Josh Coalson
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <windows.h>
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#include <mmreg.h>
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#include <msacm.h>
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#include <math.h>
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#include <assert.h>
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#include "in2.h"
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#include "FLAC/all.h"
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BOOL WINAPI _DllMainCRTStartup(HANDLE hInst, ULONG ul_reason_for_call, LPVOID lpReserved)
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{
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return TRUE;
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}
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/* post this to the main window at end of file (after playback as stopped) */
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#define WM_WA_MPEG_EOF WM_USER+2
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typedef struct {
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bool abort_flag;
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unsigned total_samples;
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unsigned bits_per_sample;
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unsigned channels;
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unsigned sample_rate;
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unsigned length_in_ms;
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} stream_info_struct;
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static bool stream_init(const char *infile);
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static FLAC__StreamDecoderWriteStatus write_callback(const FLAC__FileDecoder *decoder, const FLAC__FrameHeader *header, const int32 *buffer[], void *client_data);
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static void metadata_callback(const FLAC__FileDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
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static void error_callback(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
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In_Module mod; /* the output module (declared near the bottom of this file) */
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char lastfn[MAX_PATH]; /* currently playing file (used for getting info on the current file) */
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int decode_pos_ms; /* current decoding position, in milliseconds */
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int paused; /* are we paused? */
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int seek_needed; /* if != -1, it is the point that the decode thread should seek to, in ms. */
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int16 reservoir[FLAC__MAX_BLOCK_SIZE * 2]; /* 2 for max channels */
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char sample_buffer[576 * 2 * (16/8) * 2]; /* 2 for max channels, (16/8) for max bytes per sample, and 2 for who knows what */
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unsigned samples_in_reservoir;
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static stream_info_struct stream_info;
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static FLAC__FileDecoder *decoder;
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int killDecodeThread=0; /* the kill switch for the decode thread */
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HANDLE thread_handle=INVALID_HANDLE_VALUE; /* the handle to the decode thread */
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DWORD WINAPI __stdcall DecodeThread(void *b); /* the decode thread procedure */
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void config(HWND hwndParent)
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{
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MessageBox(hwndParent, "No configuration.", "Configuration", MB_OK);
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/* if we had a configuration we'd want to write it here :) */
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}
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void about(HWND hwndParent)
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{
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MessageBox(hwndParent,"Winamp FLAC Plugin v0.4, by Josh Coalson\nSee http://flac.sourceforge.net/","About FLAC Plugin",MB_OK);
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}
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void init()
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{
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decoder = FLAC__file_decoder_get_new_instance();
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}
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void quit()
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{
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if(decoder)
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FLAC__file_decoder_free_instance(decoder);
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}
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int isourfile(char *fn) { return 0; }
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/* used for detecting URL streams.. unused here. strncmp(fn,"http://",7) to detect HTTP streams, etc */
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int play(char *fn)
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{
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int maxlatency;
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int thread_id;
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HANDLE input_file=INVALID_HANDLE_VALUE;
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if(0 == decoder) {
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return 1;
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}
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input_file = CreateFile(fn,GENERIC_READ,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
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if (input_file == INVALID_HANDLE_VALUE) {
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return 1;
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}
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CloseHandle(input_file);
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if(!stream_init(fn)) {
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return 1;
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}
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strcpy(lastfn,fn);
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paused=0;
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decode_pos_ms=0;
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seek_needed=-1;
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samples_in_reservoir = 0;
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maxlatency = mod.outMod->Open(stream_info.sample_rate, stream_info.channels, stream_info.bits_per_sample, -1,-1);
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if (maxlatency < 0) { /* error opening device */
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return 1;
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}
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/* dividing by 1000 for the first parameter of setinfo makes it */
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/* display 'H'... for hundred.. i.e. 14H Kbps. */
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mod.SetInfo((stream_info.sample_rate*stream_info.bits_per_sample*stream_info.channels)/1000,stream_info.sample_rate/1000,stream_info.channels,1);
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/* initialize vis stuff */
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mod.SAVSAInit(maxlatency,stream_info.sample_rate);
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mod.VSASetInfo(stream_info.sample_rate,stream_info.channels);
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mod.outMod->SetVolume(-666); /* set the output plug-ins default volume */
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killDecodeThread=0;
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thread_handle = (HANDLE) CreateThread(NULL,0,(LPTHREAD_START_ROUTINE) DecodeThread,(void *) &killDecodeThread,0,&thread_id);
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return 0;
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}
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void pause()
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{
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paused=1;
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mod.outMod->Pause(1);
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}
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void unpause()
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{
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paused=0;
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mod.outMod->Pause(0);
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}
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int ispaused()
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{
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return paused;
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}
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void stop()
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{
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if (thread_handle != INVALID_HANDLE_VALUE) {
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killDecodeThread=1;
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if (WaitForSingleObject(thread_handle,INFINITE) == WAIT_TIMEOUT) {
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MessageBox(mod.hMainWindow,"error asking thread to die!\n","error killing decode thread",0);
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TerminateThread(thread_handle,0);
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}
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CloseHandle(thread_handle);
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thread_handle = INVALID_HANDLE_VALUE;
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}
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if(decoder) {
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if(decoder->state != FLAC__FILE_DECODER_UNINITIALIZED)
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FLAC__file_decoder_finish(decoder);
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}
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mod.outMod->Close();
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mod.SAVSADeInit();
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}
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int getlength()
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{
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return (int)stream_info.length_in_ms;
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}
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int getoutputtime()
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{
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return decode_pos_ms+(mod.outMod->GetOutputTime()-mod.outMod->GetWrittenTime());
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}
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void setoutputtime(int time_in_ms)
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{
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seek_needed=time_in_ms;
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}
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void setvolume(int volume) { mod.outMod->SetVolume(volume); }
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void setpan(int pan) { mod.outMod->SetPan(pan); }
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int infoDlg(char *fn, HWND hwnd)
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{
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/* TODO: implement info dialog. */
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return 0;
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}
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void getfileinfo(char *filename, char *title, int *length_in_ms)
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{
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if (!filename || !*filename) { /* currently playing file */
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if (length_in_ms)
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*length_in_ms=getlength();
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if (title) {
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char *p=lastfn+strlen(lastfn);
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while (*p != '\\' && p >= lastfn) p--;
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strcpy(title,++p);
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}
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}
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else { /* some other file */
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if (length_in_ms) {
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FLAC__FileDecoder *tmp_decoder = FLAC__file_decoder_get_new_instance();
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tmp_decoder->check_md5 = false; /* turn off MD5 checking in the decoder */
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stream_info_struct tmp_stream_info;
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tmp_stream_info.abort_flag = false;
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if(FLAC__file_decoder_init(tmp_decoder, filename, write_callback, metadata_callback, error_callback, &tmp_stream_info) != FLAC__FILE_DECODER_OK)
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return;
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if(!FLAC__file_decoder_process_metadata(tmp_decoder))
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return;
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*length_in_ms = (int)tmp_stream_info.length_in_ms;
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if(tmp_decoder->state != FLAC__FILE_DECODER_UNINITIALIZED)
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FLAC__file_decoder_finish(tmp_decoder);
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FLAC__file_decoder_free_instance(tmp_decoder);
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}
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if (title) {
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char *p=filename+strlen(filename);
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while (*p != '\\' && p >= filename) p--;
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strcpy(title,++p);
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}
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}
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}
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void eq_set(int on, char data[10], int preamp)
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{
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}
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DWORD WINAPI __stdcall DecodeThread(void *b)
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{
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int done=0;
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while (! *((int *)b) ) {
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unsigned channels = stream_info.channels;
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unsigned bits_per_sample = stream_info.bits_per_sample;
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unsigned bytes_per_sample = (bits_per_sample+7)/8;
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unsigned sample_rate = stream_info.sample_rate;
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if (seek_needed != -1) {
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const double distance = (double)seek_needed / (double)getlength();
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unsigned target_sample = (unsigned)(distance * (double)stream_info.total_samples);
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if(FLAC__file_decoder_seek_absolute(decoder, (uint64)target_sample)) {
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decode_pos_ms = (int)(distance * (double)getlength());
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seek_needed=-1;
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done=0;
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mod.outMod->Flush(decode_pos_ms);
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}
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}
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if (done) {
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if (!mod.outMod->IsPlaying()) {
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PostMessage(mod.hMainWindow,WM_WA_MPEG_EOF,0,0);
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return 0;
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}
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Sleep(10);
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}
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else if (mod.outMod->CanWrite() >= ((int)(576*channels*bytes_per_sample) << (mod.dsp_isactive()?1:0))) {
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while(samples_in_reservoir < 576) {
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if(decoder->state == FLAC__FILE_DECODER_END_OF_FILE) {
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done = 1;
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break;
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}
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else if(!FLAC__file_decoder_process_one_frame(decoder))
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break;
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}
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if (samples_in_reservoir == 0) {
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done=1;
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}
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else {
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unsigned i, n = min(samples_in_reservoir, 576), delta;
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int l;
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signed short *ssbuffer = (signed short *)sample_buffer;
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for(i = 0; i < n*channels; i++)
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ssbuffer[i] = reservoir[i];
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delta = i;
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for( ; i < samples_in_reservoir*channels; i++)
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reservoir[i-delta] = reservoir[i];
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samples_in_reservoir -= n;
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l = n * channels * bytes_per_sample;
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mod.SAAddPCMData((char *)sample_buffer,channels,bits_per_sample,decode_pos_ms);
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mod.VSAAddPCMData((char *)sample_buffer,channels,bits_per_sample,decode_pos_ms);
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decode_pos_ms+=(576*1000)/sample_rate;
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if (mod.dsp_isactive())
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l=mod.dsp_dosamples((short *)sample_buffer,n/channels/bytes_per_sample,bits_per_sample,channels,sample_rate) * (channels*bytes_per_sample);
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mod.outMod->Write(sample_buffer,l);
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}
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}
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else Sleep(20);
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}
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return 0;
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}
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In_Module mod =
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{
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IN_VER,
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"Reference FLAC Player v0.0"
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#ifdef __alpha
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"(AXP)"
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#else
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"(x86)"
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#endif
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,
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0, /* hMainWindow */
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0, /* hDllInstance */
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"FLAC\0FLAC Audio File (*.FLAC)\0"
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,
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1, /* is_seekable */
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1, /* uses output */
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config,
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about,
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init,
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quit,
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getfileinfo,
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infoDlg,
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isourfile,
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play,
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pause,
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unpause,
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ispaused,
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stop,
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getlength,
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getoutputtime,
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setoutputtime,
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setvolume,
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setpan,
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0,0,0,0,0,0,0,0,0, /* vis stuff */
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0,0, /* dsp */
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eq_set,
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NULL, /* setinfo */
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0 /* out_mod */
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};
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__declspec( dllexport ) In_Module * winampGetInModule2()
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{
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return &mod;
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}
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/***********************************************************************
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* local routines
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**********************************************************************/
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bool stream_init(const char *infile)
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{
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decoder->check_md5 = false; /* turn off MD5 checking in the decoder */
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if(FLAC__file_decoder_init(decoder, infile, write_callback, metadata_callback, error_callback, &stream_info) != FLAC__FILE_DECODER_OK) {
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MessageBox(mod.hMainWindow,"ERROR initializing decoder, state = %d\n","ERROR initializing decoder",0);
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return false;
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}
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stream_info.abort_flag = false;
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if(!FLAC__file_decoder_process_metadata(decoder)) {
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return false;
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}
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return true;
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}
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FLAC__StreamDecoderWriteStatus write_callback(const FLAC__FileDecoder *decoder, const FLAC__FrameHeader *header, const int32 *buffer[], void *client_data)
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{
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stream_info_struct *stream_info = (stream_info_struct *)client_data;
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unsigned bps = stream_info->bits_per_sample, channels = stream_info->channels;
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unsigned wide_samples = header->blocksize, wide_sample, sample, channel, offset;
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(void)decoder;
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if(stream_info->abort_flag)
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return FLAC__STREAM_DECODER_WRITE_ABORT;
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offset = samples_in_reservoir * channels;
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for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
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for(channel = 0; channel < channels; channel++, sample++)
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reservoir[offset+sample] = (int16)buffer[channel][wide_sample];
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samples_in_reservoir += wide_samples;
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return FLAC__STREAM_DECODER_WRITE_CONTINUE;
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}
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void metadata_callback(const FLAC__FileDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
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{
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stream_info_struct *stream_info = (stream_info_struct *)client_data;
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(void)decoder;
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if(metadata->type == FLAC__METADATA_TYPE_ENCODING) {
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assert(metadata->data.encoding.total_samples < 0x100000000); /* this plugin can only handle < 4 gigasamples */
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stream_info->total_samples = (unsigned)(metadata->data.encoding.total_samples&0xffffffff);
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stream_info->bits_per_sample = metadata->data.encoding.bits_per_sample;
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stream_info->channels = metadata->data.encoding.channels;
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stream_info->sample_rate = metadata->data.encoding.sample_rate;
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if(stream_info->bits_per_sample != 16) {
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MessageBox(mod.hMainWindow,"ERROR: plugin can only handle 16-bit samples\n","ERROR: plugin can only handle 16-bit samples",0);
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stream_info->abort_flag = true;
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return;
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}
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stream_info->length_in_ms = stream_info->total_samples * 10 / (stream_info->sample_rate / 100);
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}
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}
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void error_callback(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
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{
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stream_info_struct *stream_info = (stream_info_struct *)client_data;
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(void)decoder;
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if(status != FLAC__STREAM_DECODER_ERROR_LOST_SYNC)
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stream_info->abort_flag = true;
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}
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