From e2de64d6f1beb9e492daf5b886e19933c1fa41dd Mon Sep 17 00:00:00 2001
From: toma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>
Date: Wed, 25 Nov 2009 17:56:58 +0000
Subject: Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
 BUG:215923

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdemultimedia@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
---
 mpeglib/lib/splay/mpegAudioInfo.cpp | 262 ++++++++++++++++++++++++++++++++++++
 1 file changed, 262 insertions(+)
 create mode 100644 mpeglib/lib/splay/mpegAudioInfo.cpp

(limited to 'mpeglib/lib/splay/mpegAudioInfo.cpp')

diff --git a/mpeglib/lib/splay/mpegAudioInfo.cpp b/mpeglib/lib/splay/mpegAudioInfo.cpp
new file mode 100644
index 00000000..981b5bd6
--- /dev/null
+++ b/mpeglib/lib/splay/mpegAudioInfo.cpp
@@ -0,0 +1,262 @@
+/*
+  length detection etc.. for mpeg audio
+  Copyright (C) 2001  Martin Vogt
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Library General Public License as published by
+  the Free Software Foundation.
+
+  For more information look at the file COPYRIGHT in this package
+
+ */
+
+#ifndef _FROM_SOURCE
+#define _FROM_SOURCE 1
+#endif
+#include "dxHead.h"
+#include <string.h>
+#include "mpegAudioInfo.h"
+#include "mpegAudioHeader.h"
+#include "mpegAudioStream.h"
+#include "mpegAudioFrame.h"
+
+#include <iostream>
+
+using namespace std;
+
+#define _NEED_LENGTH  1
+#define _NEED_ID3     2
+#define _NEED_NOTHING 3
+
+
+MpegAudioInfo::MpegAudioInfo(FileAccess* input) {
+  xHeadData=new XHEADDATA();
+  xHeadData->toc=new unsigned char[101];
+  lXingVBR=false;
+  id3=new ID3TAG();
+  this->input=input;
+  mpegAudioFrame =new MpegAudioFrame();
+  mpegAudioStream=new MpegAudioStream();
+  mpegAudioHeader=new MpegAudioHeader();
+  reset();
+}
+
+
+MpegAudioInfo::~MpegAudioInfo() {
+  delete[] (xHeadData->toc);
+  delete xHeadData;
+  delete id3;
+  delete mpegAudioStream;
+  delete mpegAudioHeader;
+  delete mpegAudioFrame;
+}
+
+
+int MpegAudioInfo::getByteDirect() {
+  unsigned char byte;
+  if (input->read((char*)&byte,1) != 1) {
+    leof=true;
+    return -1;
+  }
+  return (int)byte;
+}
+
+void MpegAudioInfo::reset() {
+  length=0;
+  initState=_NEED_LENGTH;
+  lNeedInit=true;
+}
+
+
+int MpegAudioInfo::getNeedInit() {
+  return lNeedInit;
+}
+
+void MpegAudioInfo::setNeedInit(int lNeedInit) {
+  this->lNeedInit=lNeedInit;
+}
+
+
+int MpegAudioInfo::initialize() {
+  long fileSize=input->getByteLength();
+  switch(initState) {
+  case _NEED_NOTHING:
+    return true;
+    break;
+  case _NEED_LENGTH:
+    if (initializeLength(fileSize) == true) {
+      initState=_NEED_ID3;
+    }
+    return false;
+  case _NEED_ID3:
+    if (initializeID3(fileSize) == true) {
+      initState=_NEED_NOTHING;
+      return true;
+    }
+    return false;
+  default:
+    cout << "unknown initState in MpegAudioInfo::initialize"<<endl;
+    exit(0);
+  }
+  // never happens
+  return true;
+}
+
+
+int MpegAudioInfo::initializeLength(long fileSize) {
+  // if we are streaming don't touch the stream for length detection
+  if (fileSize == 0) {
+    return true;
+  }
+  int back=getFrame(mpegAudioFrame);
+  if (back != true) {
+    return back;
+  }
+  // found a valid frame (back == true)
+  // store information in header.
+  if (mpegAudioHeader->parseHeader(mpegAudioFrame->outdata()) == false) {
+    cout << "parse header false"<<endl;
+    return false;
+  }
+  calculateLength(fileSize);
+  return back;
+}
+
+int MpegAudioInfo::initializeID3(long fileSize) {
+  int pos=input->getBytePosition();
+  if (input->seek(fileSize-128)<0) {
+    return true;
+  }
+  parseID3();
+  input->seek(pos);
+  return true;
+}
+
+
+long MpegAudioInfo::getLength() {
+  return length;
+}
+
+
+void MpegAudioInfo::calculateLength(long fileSize) {
+  
+  int totalframe=0;
+  int framesize=mpegAudioHeader->getFramesize();
+  if (framesize > 0) {
+    totalframe=fileSize/framesize;
+    
+    if (parseXing(mpegAudioFrame->outdata(),mpegAudioFrame->len()) == true) {
+      lXingVBR=true;
+      totalframe=xHeadData->frames;
+    }
+  }
+  
+  float pcm=mpegAudioHeader->getpcmperframe();
+  float wavfilesize=(totalframe*pcm);
+  float frequence=(float)mpegAudioHeader->getFrequencyHz();
+  length=0;
+  if (frequence != 0) {
+    length=(int)(wavfilesize/frequence);
+  }
+}
+
+
+int MpegAudioInfo::parseXing(unsigned char* frame,int size) {
+
+  int back=false;
+  if (size < 152) {
+    return false;
+  }
+  back=GetXingHeader(xHeadData,(unsigned char*)frame);
+  return back;
+
+}
+
+
+
+long MpegAudioInfo::getSeekPosition(int second) {
+  float length=getLength();
+  long fileSize=input->getByteLength();
+  long pos=0;
+  if (length<1.0) {
+    return 0;
+  }
+  float percent=(float)second/length;
+  
+  if (lXingVBR) {
+    pos=SeekPoint(xHeadData->toc,(int)fileSize,100.0*percent);
+    return pos;
+  }
+  pos=(long)(percent*(float)fileSize);
+  return pos;
+}
+
+
+void MpegAudioInfo::parseID3() {
+   
+  id3->name    [0]=0;
+  id3->artist  [0]=0;
+  id3->album   [0]=0;
+  id3->year    [0]=0;
+  id3->comment [0]=0;
+  id3->genre      =0;
+  
+  leof=false;
+
+  while(leof == false) {
+    if(getByteDirect()==0x54)
+      if(getByteDirect()==0x41)
+        if(getByteDirect()==0x47) {
+	  input->read((char*)&id3->name    ,30);id3->name[30]=0;
+	  input->read((char*)&id3->artist  ,30);id3->artist[30]=0;
+	  input->read((char*)&id3->album   ,30);id3->album[30]=0;
+	  input->read((char*)&id3->year    , 4);id3->year[4]=0;
+	  input->read((char*)&id3->comment ,30);id3->comment[30]=0;
+	  input->read((char*)&id3->genre   ,1);
+          return;
+        }
+  }
+}
+
+
+
+void MpegAudioInfo::print(const char* msg) {
+  cout << "MpegAudioInfo:"<<msg<<endl;
+  cout << "Length (sec):"<<length<<endl;
+  cout << "VBR:"<<lXingVBR<<endl;
+  cout << "ID3: Name:"<<id3->name<<endl;
+  cout << "ID3: Artist:"<<id3->artist<<endl;
+  cout << "ID3: Album:"<<id3->album<<endl;
+  cout << "ID3: year:"<<id3->year<<endl;
+  cout << "ID3: genre:"<<(int)(id3->genre)<<endl;
+  cout << "ID3: comment:"<<id3->comment<<endl;
+
+}
+
+
+int MpegAudioInfo::getFrame(MpegAudioFrame* frame) {
+  int state=frame->getState();
+  switch(state) {
+  case FRAME_NEED: {
+    int bytes=frame->canStore();
+    int read=input->read((char*)inputbuffer,bytes);
+    if (read <= 0) {
+      // read error. reset framer
+      frame->reset();
+      break;
+    }
+    frame->store(inputbuffer,bytes);
+    break;
+  }
+  case FRAME_WORK:
+    frame->work();
+    break;
+  case FRAME_HAS:
+    return true;
+    break;
+  default:
+    cout << "unknown state in mpeg audio framing"<<endl;
+    exit(0);
+  }
+  return false;
+}
-- 
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