decoder-mp3-stream.c
author nathan
Sun, 06 Dec 2009 08:48:57 +0800
branchtrunk
changeset 34 afc13760179b
parent 0 474a1293c3c0
permissions -rw-r--r--
fixed gcc 4.4.1 const errors
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/*
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 * MP3/MPlayer plugin to VDR (C++)
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 *
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 * (C) 2001-2005 Stefan Huelswitt <s.huelswitt@gmx.de>
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 *
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 * This code is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU General Public License
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 * as published by the Free Software Foundation; either version 2
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 * of the License, or (at your option) any later version.
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 *
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 * This code is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
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 */
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <sys/types.h>
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#include "common.h"
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#include "decoder-mp3-stream.h"
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#include "stream.h"
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// --- cNetScanID3 -------------------------------------------------------------
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class cNetScanID3 : public cScanID3 {
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private:
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  cNetStream *nstr;
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  //
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  void IcyInfo(void);
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public:
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  cNetScanID3(cNetStream *Str, bool *Urgent);
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  virtual bool DoScan(bool KeepOpen=false);
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  virtual void InfoHook(struct mad_header *header);
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  };
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cNetScanID3::cNetScanID3(cNetStream *Str, bool *Urgent)
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:cScanID3(Str,Urgent)
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{
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  nstr=Str;
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}
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bool cNetScanID3::DoScan(bool KeepOpen)
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{
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  Clear();
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  IcyInfo();
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  if(!Title) FakeTitle(nstr->Filename);
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  Total=0;
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  ChMode=3;
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  DecoderID=DEC_MP3S;
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  InfoDone();
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  return true;
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}
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void cNetScanID3::InfoHook(struct mad_header *header)
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{
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  if(nstr->IcyChanged()) IcyInfo();
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  SampleFreq=header->samplerate;
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  Channels=MAD_NCHANNELS(header);
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  ChMode=header->mode;
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  int br=header->bitrate;
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  if(Bitrate<0) Bitrate=br;
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  else if(Bitrate!=br) {
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    if(MaxBitrate<0) {
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      if(Bitrate<br) MaxBitrate=br;
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      else { MaxBitrate=Bitrate; Bitrate=br; }
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      }
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    else {
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      if(br>MaxBitrate) MaxBitrate=br;
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      if(br<Bitrate)    Bitrate=br;
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      }
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    }
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}
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void cNetScanID3::IcyInfo(void)
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{
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  const char *t=nstr->IcyTitle();
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  const char *a;
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  if(t) {
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    a=nstr->IcyName();
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    if(!a) a=nstr->IcyUrl();
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    }
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  else {
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    t=nstr->IcyName();
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    a=nstr->IcyUrl();
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    }
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  if(t && (!Title || strcmp(t,Title))) {
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    free(Title);
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    Title=strdup(t);
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    }
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  if(a && (!Album || strcmp(a,Album))) {
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    free(Album);
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    Album=strdup(a);
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    }
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}
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// --- cMP3StreamDecoder -------------------------------------------------------
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cMP3StreamDecoder::cMP3StreamDecoder(const char *Filename)
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:cMP3Decoder(Filename,false)
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{
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  nstr=new cNetStream(filename);
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  str=nstr;
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  nscan=new cNetScanID3(nstr,&urgentLock);
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  scan=nscan;
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  isStream=true;
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}
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bool cMP3StreamDecoder::Valid(void)
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{
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  bool res=false;
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  if(TryLock()) {
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    if(nstr->Valid()) res=true;
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    Unlock();
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    }
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  return res;
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}