/* 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 #include #include #include #include #include "in2.h" #include "FLAC/all.h" typedef struct { FLAC__byte raw[128]; char title[31]; char artist[31]; char album[31]; char comment[31]; unsigned year; unsigned track; /* may be 0 if v1 (not v1.1) tag */ unsigned genre; char description[1024]; /* the formatted description passed to player */ } id3v1_struct; 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_ms; } 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 *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 FLAC__bool get_id3v1_tag_(const char *filename, id3v1_struct *tag); 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. */ FLAC__int16 reservoir_[FLAC__MAX_BLOCK_SIZE * 2 * 2]; /* *2 for max channels, another *2 for overflow */ 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 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 */ 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" FLAC__VERSION_STRING ", 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; 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; } strcpy(lastfn_, fn); paused_ = 0; decode_pos_ms_ = 0; seek_needed_ = -1; samples_in_reservoir_ = 0; maxlatency = mod_.outMod->Open(file_info_.sample_rate, file_info_.channels, file_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((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_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) { id3v1_struct tag; FLAC__StreamMetadata_StreamInfo streaminfo; if(0 == filename) { filename = lastfn_; if (length_in_ms) { *length_in_ms = getlength(); length_in_ms = 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) { (void)get_id3v1_tag_(filename, &tag); strcpy(title, tag.description); } if(length_in_msec) *length_in_msec = streaminfo.total_samples * 10 / (streaminfo.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) ) { unsigned channels = file_info_.channels; unsigned bits_per_sample = file_info_.bits_per_sample; unsigned bytes_per_sample = (bits_per_sample+7)/8; unsigned sample_rate = file_info_.sample_rate; if (seek_needed_ != -1) { const double distance = (double)seek_needed_ / (double)getlength(); 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)(576*channels*bytes_per_sample) << (mod_.dsp_isactive()?1:0))) { while(samples_in_reservoir_ < 576) { if(FLAC__file_decoder_get_state(decoder_) == 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 bytes; 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; 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_ += (n*1000 + sample_rate/2)/sample_rate; if (mod_.dsp_isactive()) bytes = mod_.dsp_dosamples((short *)sample_buffer_, n, bits_per_sample, channels, sample_rate) * (channels*bytes_per_sample); else bytes = n * channels * bytes_per_sample; mod_.outMod->Write(sample_buffer_, bytes); } } else Sleep(20); } return 0; } In_Module mod_ = { IN_VER, "Reference FLAC Player v" FLAC__VERSION_STRING, 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_metadata(decoder)) { MessageBox(mod_.hMainWindow, FLAC__FileDecoderStateString[FLAC__file_decoder_get_state(decoder)], "ERROR processing metadata", 0); 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 *buffer[], void *client_data) { file_info_struct *file_info_ = (file_info_struct *)client_data; const unsigned bps = file_info_->bits_per_sample, channels = file_info_->channels, wide_samples = frame->header.blocksize; unsigned wide_sample, sample, channel; (void)decoder; if(file_info_->abort_flag) return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; for(sample = samples_in_reservoir_ * channels, wide_sample = 0; wide_sample < wide_samples; wide_sample++) for(channel = 0; channel < channels; channel++, sample++) reservoir_[sample] = (FLAC__int16)buffer[channel][wide_sample]; 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; if(file_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); file_info_->abort_flag = true; return; } file_info_->length_in_ms = 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; } FLAC__bool get_id3v1_tag_(const char *filename, id3v1_struct *tag) { const char *temp; FILE *f = fopen(filename, "rb"); memset(tag, 0, sizeof(id3v1_struct)); /* set the title and description to the filename by default */ temp = strrchr(filename, '/'); if(!temp) temp = filename; else temp++; strcpy(tag->description, temp); *strrchr(tag->description, '.') = '\0'; strncpy(tag->title, tag->description, 30); tag->title[30] = '\0'; if(0 == f) return false; if(-1 == fseek(f, -128, SEEK_END)) { fclose(f); return false; } if(fread(tag->raw, 1, 128, f) < 128) { fclose(f); return false; } fclose(f); if(strncmp(tag->raw, "TAG", 3)) return false; else { char year_str[5]; memcpy(tag->title, tag->raw+3, 30); memcpy(tag->artist, tag->raw+33, 30); memcpy(tag->album, tag->raw+63, 30); memcpy(year_str, tag->raw+93, 4); year_str[4] = '\0'; tag->year = atoi(year_str); memcpy(tag->comment, tag->raw+97, 30); tag->genre = (unsigned)((FLAC__byte)tag->raw[127]); tag->track = (unsigned)((FLAC__byte)tag->raw[126]); sprintf(tag->description, "%s - %s", tag->artist[0]? tag->artist : "Unknown Artist", tag->title[0]? tag->title : "Untitled"); return true; } }