/* in_flac - Winamp FLAC input plugin * Copyright (C) 2000 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 #include #include #include #include #include "in2.h" #include "FLAC/all.h" 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 { bool abort_flag; unsigned total_samples; unsigned bits_per_sample; unsigned channels; unsigned sample_rate; unsigned length_in_ms; } stream_info_struct; static bool stream_init(const char *infile); static FLAC__StreamDecoderWriteStatus write_callback(const FLAC__FileDecoder *decoder, const FLAC__FrameHeader *header, const int32 *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); 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. */ int16 reservoir[FLAC__MAX_BLOCK_SIZE * 2]; /* 2 for max channels */ 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 */ unsigned samples_in_reservoir; static stream_info_struct stream_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 */ 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 v0.4, by Josh Coalson\nSee http://flac.sourceforge.net/","About FLAC Plugin",MB_OK); } void init() { decoder = FLAC__file_decoder_get_new_instance(); } void quit() { if(decoder) FLAC__file_decoder_free_instance(decoder); } 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; 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(!stream_init(fn)) { return 1; } strcpy(lastfn,fn); paused=0; decode_pos_ms=0; seek_needed=-1; samples_in_reservoir = 0; maxlatency = mod.outMod->Open(stream_info.sample_rate, stream_info.channels, stream_info.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((stream_info.sample_rate*stream_info.bits_per_sample*stream_info.channels)/1000,stream_info.sample_rate/1000,stream_info.channels,1); /* initialize vis stuff */ mod.SAVSAInit(maxlatency,stream_info.sample_rate); mod.VSASetInfo(stream_info.sample_rate,stream_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; } if(decoder) { if(decoder->state != FLAC__FILE_DECODER_UNINITIALIZED) FLAC__file_decoder_finish(decoder); } mod.outMod->Close(); mod.SAVSADeInit(); } int getlength() { return (int)stream_info.length_in_ms; } 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_ms) { if (!filename || !*filename) { /* currently playing file */ if (length_in_ms) *length_in_ms=getlength(); if (title) { char *p=lastfn+strlen(lastfn); while (*p != '\\' && p >= lastfn) p--; strcpy(title,++p); } } else { /* some other file */ if (length_in_ms) { FLAC__FileDecoder *tmp_decoder = FLAC__file_decoder_get_new_instance(); stream_info_struct tmp_stream_info; tmp_stream_info.abort_flag = false; if(FLAC__file_decoder_init(tmp_decoder, filename, write_callback, metadata_callback, error_callback, &tmp_stream_info) != FLAC__FILE_DECODER_OK) return; if(!FLAC__file_decoder_process_metadata(tmp_decoder)) return; *length_in_ms = (int)tmp_stream_info.length_in_ms; if(tmp_decoder->state != FLAC__FILE_DECODER_UNINITIALIZED) FLAC__file_decoder_finish(tmp_decoder); FLAC__file_decoder_free_instance(tmp_decoder); } if (title) { char *p=filename+strlen(filename); while (*p != '\\' && p >= filename) p--; strcpy(title,++p); } } } void eq_set(int on, char data[10], int preamp) { } DWORD WINAPI __stdcall DecodeThread(void *b) { int done=0; while (! *((int *)b) ) { unsigned channels = stream_info.channels; unsigned bits_per_sample = stream_info.bits_per_sample; unsigned bytes_per_sample = (bits_per_sample+7)/8; unsigned sample_rate = stream_info.sample_rate; if (seek_needed != -1) { const double distance = (double)seek_needed / (double)getlength(); unsigned target_sample = (unsigned)(distance * (double)stream_info.total_samples); if(FLAC__file_decoder_seek_absolute(decoder, (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)(576*channels*bytes_per_sample) << (mod.dsp_isactive()?1:0))) { while(samples_in_reservoir < 576) { if(decoder->state == FLAC__FILE_DECODER_END_OF_FILE) { done = 1; break; } else if(!FLAC__file_decoder_process_one_frame(decoder)) break; } if (samples_in_reservoir == 0) { done=1; } else { unsigned i, n = min(samples_in_reservoir, 576), delta; int l; signed short *ssbuffer = (signed short *)sample_buffer; for(i = 0; i < n*channels; i++) ssbuffer[i] = reservoir[i]; delta = i; for( ; i < samples_in_reservoir*channels; i++) reservoir[i-delta] = reservoir[i]; samples_in_reservoir -= n; l = n * channels * bytes_per_sample; mod.SAAddPCMData((char *)sample_buffer,channels,bits_per_sample,decode_pos_ms); mod.VSAAddPCMData((char *)sample_buffer,channels,bits_per_sample,decode_pos_ms); decode_pos_ms+=(576*1000)/sample_rate; if (mod.dsp_isactive()) l=mod.dsp_dosamples((short *)sample_buffer,n/channels/bytes_per_sample,bits_per_sample,channels,sample_rate) * (channels*bytes_per_sample); mod.outMod->Write(sample_buffer,l); } } else Sleep(20); } return 0; } In_Module mod = { IN_VER, "Reference FLAC Player v0.0" #ifdef __alpha "(AXP)" #else "(x86)" #endif , 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 **********************************************************************/ bool stream_init(const char *infile) { if(FLAC__file_decoder_init(decoder, infile, write_callback, metadata_callback, error_callback, &stream_info) != FLAC__FILE_DECODER_OK) { MessageBox(mod.hMainWindow,"ERROR initializing decoder, state = %d\n","ERROR initializing decoder",0); return false; } stream_info.abort_flag = false; if(!FLAC__file_decoder_process_metadata(decoder)) { return false; } return true; } FLAC__StreamDecoderWriteStatus write_callback(const FLAC__FileDecoder *decoder, const FLAC__FrameHeader *header, const int32 *buffer[], void *client_data) { stream_info_struct *stream_info = (stream_info_struct *)client_data; unsigned bps = stream_info->bits_per_sample, channels = stream_info->channels; unsigned wide_samples = header->blocksize, wide_sample, sample, channel, offset; (void)decoder; if(stream_info->abort_flag) return FLAC__STREAM_DECODER_WRITE_ABORT; offset = samples_in_reservoir * channels; for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++) for(channel = 0; channel < channels; channel++, sample++) reservoir[offset+sample] = (int16)buffer[channel][wide_sample]; samples_in_reservoir += wide_samples; return FLAC__STREAM_DECODER_WRITE_CONTINUE; } void metadata_callback(const FLAC__FileDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data) { stream_info_struct *stream_info = (stream_info_struct *)client_data; (void)decoder; if(metadata->type == FLAC__METADATA_TYPE_ENCODING) { assert(metadata->data.encoding.total_samples < 0x100000000); /* this plugin can only handle < 4 gigasamples */ stream_info->total_samples = (unsigned)(metadata->data.encoding.total_samples&0xffffffff); stream_info->bits_per_sample = metadata->data.encoding.bits_per_sample; stream_info->channels = metadata->data.encoding.channels; stream_info->sample_rate = metadata->data.encoding.sample_rate; if(stream_info->bits_per_sample != 16) { MessageBox(mod.hMainWindow,"ERROR: plugin can only handle 16-bit samples\n","ERROR: plugin can only handle 16-bit samples",0); stream_info->abort_flag = true; return; } stream_info->length_in_ms = stream_info->total_samples * 10 / (stream_info->sample_rate / 100); } } void error_callback(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) { stream_info_struct *stream_info = (stream_info_struct *)client_data; (void)decoder; if(status != FLAC__STREAM_DECODER_ERROR_LOST_SYNC) stream_info->abort_flag = true; }