| /* 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" |
| |
| 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 * 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 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_msec) |
| { |
| id3v1_struct tag; |
| 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) { |
| (void)get_id3v1_tag_(filename, &tag); |
| strcpy(title, tag.description); |
| } |
| 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) ) { |
| 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_)) { |
| MessageBox(mod_.hMainWindow, FLAC__FileDecoderStateString[FLAC__file_decoder_get_state(decoder_)], "READ ERROR processing frame", 0); |
| done = 1; |
| 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 * const 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; |
| } |
| } |