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in_flac.c
资源名称:tcpmp.rar [点击查看]
上传用户:wstnjxml
上传日期:2014-04-03
资源大小:7248k
文件大小:10k
源码类别:
Windows CE
开发平台:
C/C++
- /* in_flac - Winamp2 FLAC input plugin
- * Copyright (C) 2000,2001,2002,2003,2004,2005 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 <stdio.h>
- #include "winamp2/in2.h"
- #include "config.h"
- #include "infobox.h"
- #include "tagz.h"
- #define PLUGIN_VERSION "1.1.2"
- static In_Module mod_; /* the input module (declared near the bottom of this file) */
- static char lastfn_[MAX_PATH]; /* currently playing file (used for getting info on the current file) */
- flac_config_t flac_cfg;
- static file_info_struct file_info_;
- static int paused;
- static FLAC__FileDecoder *decoder_;
- static char sample_buffer_[SAMPLES_PER_WRITE * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS * (24/8) * 2];
- /* (24/8) for max bytes per sample, and 2 for DSPs */
- static HANDLE thread_handle = NULL; /* the handle to the decode thread */
- static DWORD WINAPI DecodeThread(void *b); /* the decode thread procedure */
- /*
- * init/quit
- */
- static void init()
- {
- decoder_ = FLAC__file_decoder_new();
- strcpy(lastfn_, "");
- InitConfig();
- ReadConfig();
- InitInfobox();
- }
- static void quit()
- {
- WriteConfig();
- DeinitInfobox();
- FLAC_plugin__decoder_delete(decoder_);
- decoder_ = 0;
- }
- /*
- * open/close
- */
- static int isourfile(char *fn) { return 0; }
- static int play(char *fn)
- {
- LONGLONG filesize;
- DWORD thread_id;
- int maxlatency;
- /* checks */
- if (decoder_ == 0) return 1;
- if (!(filesize = FileSize(fn))) return -1;
- /* init decoder */
- if (!FLAC_plugin__decoder_init(decoder_, fn, filesize, &file_info_, &flac_cfg.output))
- return 1;
- strcpy(lastfn_, fn);
- /* open output */
- maxlatency = mod_.outMod->Open(file_info_.sample_rate, file_info_.channels, file_info_.output_bits_per_sample, -1, -1);
- if (maxlatency < 0)
- {
- FLAC_plugin__decoder_finish(decoder_);
- return 1;
- }
- /* set defaults */
- mod_.outMod->SetVolume(-666);
- mod_.outMod->SetPan(0);
- /* initialize vis stuff */
- mod_.SAVSAInit(maxlatency, file_info_.sample_rate);
- mod_.VSASetInfo(file_info_.sample_rate, file_info_.channels);
- /* set info */
- mod_.SetInfo(file_info_.average_bps, file_info_.sample_rate/1000, file_info_.channels, 1);
- /* start playing thread */
- paused = 0;
- thread_handle = CreateThread(NULL, 0, DecodeThread, NULL, 0, &thread_id);
- if (!thread_handle) return 1;
- return 0;
- }
- static void stop()
- {
- if (thread_handle)
- {
- file_info_.is_playing = false;
- if (WaitForSingleObject(thread_handle, 2000) == WAIT_TIMEOUT)
- {
- FLAC_plugin__show_error("Error while stopping decoding thread.");
- TerminateThread(thread_handle, 0);
- }
- CloseHandle(thread_handle);
- thread_handle = NULL;
- }
- FLAC_plugin__decoder_finish(decoder_);
- mod_.outMod->Close();
- mod_.SAVSADeInit();
- }
- /*
- * play control
- */
- static void pause()
- {
- paused = 1;
- mod_.outMod->Pause(1);
- }
- static void unpause()
- {
- paused = 0;
- mod_.outMod->Pause(0);
- }
- static int ispaused()
- {
- return paused;
- }
- static int getlength()
- {
- return file_info_.length_in_msec;
- }
- static int getoutputtime()
- {
- return mod_.outMod->GetOutputTime();
- }
- static void setoutputtime(int time_in_ms)
- {
- file_info_.seek_to = time_in_ms;
- }
- static void setvolume(int volume)
- {
- mod_.outMod->SetVolume(volume);
- }
- static void setpan(int pan)
- {
- mod_.outMod->SetPan(pan);
- }
- static void eq_set(int on, char data[10], int preamp) {}
- /*
- * playing loop
- */
- static void do_vis(char *data, int nch, int resolution, int position, unsigned samples)
- {
- static char vis_buffer[SAMPLES_PER_WRITE * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS];
- char *ptr;
- int size, count;
- /*
- * Winamp visuals may have problems accepting sample sizes larger than
- * 16 bits, so we reduce the sample size here if necessary.
- */
- switch(resolution) {
- case 32:
- case 24:
- size = resolution / 8;
- count = samples * nch;
- data += size - 1;
- ptr = vis_buffer;
- while(count--) {
- *ptr++ = data[0] ^ 0x80;
- data += size;
- }
- data = vis_buffer;
- resolution = 8;
- /* fall through */
- case 16:
- case 8:
- mod_.SAAddPCMData(data, nch, resolution, position);
- mod_.VSAAddPCMData(data, nch, resolution, position);
- }
- }
- static DWORD WINAPI DecodeThread(void *unused)
- {
- const unsigned channels = file_info_.channels;
- const unsigned bits_per_sample = file_info_.bits_per_sample;
- const unsigned target_bps = file_info_.output_bits_per_sample;
- const unsigned sample_rate = file_info_.sample_rate;
- const unsigned fact = channels * (target_bps/8);
- while (file_info_.is_playing)
- {
- /* seek needed */
- if (file_info_.seek_to != -1)
- {
- const int pos = FLAC_plugin__seek(decoder_, &file_info_);
- if (pos != -1) mod_.outMod->Flush(pos);
- }
- /* stream ended */
- else if (file_info_.eof)
- {
- if (!mod_.outMod->IsPlaying())
- {
- PostMessage(mod_.hMainWindow, WM_WA_MPEG_EOF, 0, 0);
- return 0;
- }
- Sleep(10);
- }
- /* decode */
- else
- {
- /* decode samples */
- int bytes = FLAC_plugin__decode(decoder_, &file_info_, sample_buffer_);
- const int n = bytes / fact;
- /* visualization */
- do_vis(sample_buffer_, channels, target_bps, mod_.outMod->GetWrittenTime(), n);
- /* dsp */
- if (mod_.dsp_isactive())
- bytes = mod_.dsp_dosamples((short*)sample_buffer_, n, target_bps, channels, sample_rate) * fact;
- /* output */
- while (mod_.outMod->CanWrite()<bytes && file_info_.is_playing && file_info_.seek_to==-1)
- Sleep(20);
- if (file_info_.is_playing && file_info_.seek_to==-1)
- mod_.outMod->Write(sample_buffer_, bytes);
- /* show bitrate */
- if (flac_cfg.display.show_bps)
- {
- const int rate = FLAC_plugin__get_rate(mod_.outMod->GetWrittenTime(), mod_.outMod->GetOutputTime(), &file_info_);
- if (rate) mod_.SetInfo(rate/1000, file_info_.sample_rate/1000, file_info_.channels, 1);
- }
- }
- }
- return 0;
- }
- /*
- * title formatting
- */
- static T_CHAR *get_tag(const T_CHAR *tag, void *param)
- {
- FLAC__StreamMetadata *tags = (FLAC__StreamMetadata*)param;
- char *tagname, *p;
- T_CHAR *val;
- if (!tag)
- return 0;
- /* Vorbis comment names must be ASCII, so convert 'tag' first */
- tagname = malloc(wcslen(tag)+1);
- for(p=tagname;*tag;) {
- if(*tag > 0x7d) {
- free(tagname);
- return 0;
- }
- else
- *p++ = (char)(*tag++);
- }
- *p++ = '';
- /* now get it */
- val = FLAC_plugin__tags_get_tag_ucs2(tags, tagname);
- free(tagname);
- /* some "user friendly cheavats" */
- if (!val)
- {
- if (!wcsicmp(tag, L"ARTIST"))
- {
- val = FLAC_plugin__tags_get_tag_ucs2(tags, "PERFORMER");
- if (!val) val = FLAC_plugin__tags_get_tag_ucs2(tags, "COMPOSER");
- }
- else if (!wcsicmp(tag, L"YEAR") || !wcsicmp(tag, L"DATE"))
- {
- val = FLAC_plugin__tags_get_tag_ucs2(tags, "YEAR_RECORDED");
- if (!val) val = FLAC_plugin__tags_get_tag_ucs2(tags, "YEAR_PERFORMED");
- }
- }
- return val;
- }
- static void free_tag(T_CHAR *tag, void *param)
- {
- (void)param;
- free(tag);
- }
- static void format_title(const char *filename, WCHAR *title, unsigned max_size)
- {
- FLAC__StreamMetadata *tags;
- ReadTags(filename, &tags, /*forDisplay=*/true);
- tagz_format(flac_cfg.title.tag_format_w, get_tag, free_tag, tags, title, max_size);
- FLAC_plugin__tags_destroy(&tags);
- }
- static void getfileinfo(char *filename, char *title, int *length_in_msec)
- {
- FLAC__StreamMetadata streaminfo;
- if (!filename || !*filename)
- {
- filename = lastfn_;
- if (length_in_msec)
- {
- *length_in_msec = (int)file_info_.length_in_msec;
- length_in_msec = 0; /* force skip in following code */
- }
- }
- if (!FLAC__metadata_get_streaminfo(filename, &streaminfo))
- {
- if (length_in_msec)
- *length_in_msec = -1;
- return;
- }
- if (title)
- {
- static WCHAR buffer[400];
- format_title(filename, buffer, 400);
- WideCharToMultiByte(CP_ACP, WC_COMPOSITECHECK, buffer, -1, title, 400, NULL, NULL);
- }
- if (length_in_msec)
- /* with VC++ you have to spoon feed it the casting from uint64->int64->double */
- *length_in_msec = (int)((double)(FLAC__int64)streaminfo.data.stream_info.total_samples / (double)streaminfo.data.stream_info.sample_rate * 1000.0 + 0.5);
- }
- /*
- * interface
- */
- void FLAC_plugin__show_error(const char *message,...)
- {
- char foo[512];
- va_list args;
- va_start(args, message);
- vsprintf(foo, message, args);
- va_end(args);
- MessageBox(mod_.hMainWindow, foo, "FLAC Plug-in Error", MB_ICONSTOP);
- }
- static void about(HWND hwndParent)
- {
- MessageBox(hwndParent, "Winamp2 FLAC Plugin v"PLUGIN_VERSION"nby Josh Coalson and X-Fixernnuses libFLAC "VERSION"nSee http://flac.sourceforge.net/n", "About FLAC Plugin", MB_ICONINFORMATION);
- }
- static void config(HWND hwndParent)
- {
- if (DoConfig(mod_.hDllInstance, hwndParent))
- WriteConfig();
- }
- static int infobox(char *fn, HWND hwnd)
- {
- DoInfoBox(mod_.hDllInstance, hwnd, fn);
- return 0;
- }
- /*
- * exported stuff
- */
- static In_Module mod_ =
- {
- IN_VER,
- "FLAC Decoder v" PLUGIN_VERSION,
- 0, /* hMainWindow */
- 0, /* hDllInstance */
- "FLACFLAC Audio File (*.FLAC)",
- 1, /* is_seekable */
- 1, /* uses output */
- config,
- about,
- init,
- quit,
- getfileinfo,
- infobox,
- 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_;
- }
- BOOL WINAPI _DllMainCRTStartup(HANDLE hInst, ULONG ul_reason_for_call, LPVOID lpReserved)
- {
- return TRUE;
- }