/* 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 "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 { FLAC__bool abort_flag; unsigned total_samples; unsigned bits_per_sample; unsigned channels; unsigned sample_rate; unsigned length_in_ms; } stream_info_struct; static FLAC__bool stream_init(const char *infilename); 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); 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 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 v" FLAC__VERSION_STRING ", by Josh Coalson\nSee http://flac.sourceforge.net/", "About FLAC Plugin", MB_OK); } void init() { decoder = FLAC__file_decoder_new(); } void quit() { if(decoder) { FLAC__file_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(!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) 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_new(); stream_info_struct tmp_stream_info; tmp_stream_info.abort_flag = false; FLAC__file_decoder_set_md5_checking(tmp_decoder, false); FLAC__file_decoder_set_filename(tmp_decoder, filename); FLAC__file_decoder_set_write_callback(tmp_decoder, write_callback); FLAC__file_decoder_set_metadata_callback(tmp_decoder, metadata_callback); FLAC__file_decoder_set_error_callback(tmp_decoder, error_callback); FLAC__file_decoder_set_client_data(tmp_decoder, &tmp_stream_info); if(FLAC__file_decoder_init(tmp_decoder) != FLAC__FILE_DECODER_OK) return; if(!FLAC__file_decoder_process_metadata(tmp_decoder)) return; *length_in_ms = (int)tmp_stream_info.length_in_ms; FLAC__file_decoder_finish(tmp_decoder); FLAC__file_decoder_delete(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, (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 stream_init(const char *infilename) { FLAC__file_decoder_set_md5_checking(decoder, false); FLAC__file_decoder_set_filename(decoder, infilename); 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, &stream_info); if(FLAC__file_decoder_init(decoder) != 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__Frame *frame, const FLAC__int32 *buffer[], void *client_data) { stream_info_struct *stream_info = (stream_info_struct *)client_data; const unsigned bps = stream_info->bits_per_sample, channels = stream_info->channels, wide_samples = frame->header.blocksize; unsigned wide_sample, sample, channel; (void)decoder; if(stream_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) { stream_info_struct *stream_info = (stream_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 */ stream_info->total_samples = (unsigned)(metadata->data.stream_info.total_samples&0xffffffff); stream_info->bits_per_sample = metadata->data.stream_info.bits_per_sample; stream_info->channels = metadata->data.stream_info.channels; stream_info->sample_rate = metadata->data.stream_info.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_STATUS_LOST_SYNC) stream_info->abort_flag = true; }