/// <summary>
/// Reset the OggFile (reload from disk).
/// Useful if tags have changed externally, or to reset the internal position pointer to replay the file from the beginning
/// SeekToTime(0) is the preferred method of moving the internal pointer to the beginning however however
/// </summary>
public void ResetFile()
{
try
{
// Grab a fresh instance of the file
m_CSVorbisFileInstance = m_CSVorbisFile.makeInstance();
m_TagLibFile = null;
m_TagLibFile = TagLib.File.Create(m_Filename);
}
catch (Exception ex)
{
throw new Exception("Unable to reload OggFile [" + m_Filename + "]", ex);
}
}
private TagLib.File m_TagLibFile; // TagLibSharp file object
#endregion Fields
#region Constructors
/// <summary>
/// Constructor
/// </summary>
/// <param name="Filename">
/// A <see cref="System.String"/> containing the path to the Ogg Vorbis file this instance represents
/// </param>
public OggFile(string Filename)
{
// Check that the file exists
if (!(System.IO.File.Exists(Filename))) { throw new OggFileReadException("File not found", Filename); }
// Load the relevant objects
m_Filename = Filename;
try
{
m_CSVorbisFile = new VorbisFile(m_Filename);
}
catch (Exception ex)
{
throw new OggFileReadException("Unable to open file for data reading\n" + ex.Message, Filename);
}
try
{
m_TagLibFile = TagLib.File.Create(m_Filename);
}
catch (TagLib.UnsupportedFormatException ex)
{
throw new OggFileReadException("Unsupported format (not an ogg?)\n" + ex.Message, Filename);
}
catch (TagLib.CorruptFileException ex)
{
throw new OggFileCorruptException(ex.Message, Filename, "Tags");
}
// Populate some other info shizzle and do a little bit of sanity checking
m_Streams = m_CSVorbisFile.streams();
if (m_Streams<=0) { throw new OggFileReadException("File doesn't contain any logical bitstreams", Filename); }
// Assuming <0 is for whole file and >=0 is for specific logical bitstreams
m_Bitrate = m_CSVorbisFile.bitrate(-1);
m_LengthTime = (int)m_CSVorbisFile.time_total(-1);
// Figure out the ALFormat of the stream
m_Info = m_CSVorbisFile.getInfo(); // Get the info of the first stream, assuming all streams are the same? Dunno if this is safe tbh
if (m_Info[0] == null) { throw new OggFileReadException("Unable to determine Format{FileInfo.Channels} for first bitstream", Filename); }
if (m_TagLibFile.Properties.AudioBitrate==16) {
m_Format = (m_Info[0].channels)==1 ? ALFormat.Mono16 : ALFormat.Stereo16; // This looks like a fudge, but I've seen it a couple of times (what about the other formats I wonder?)
}
else
{
m_Format = (m_Info[0].channels)==1 ? ALFormat.Mono8 : ALFormat.Stereo8;
}
// A grab our first instance of the file so we're ready to play
m_CSVorbisFileInstance = m_CSVorbisFile.makeInstance();
}
/// <summary>
/// Retrive the source info from a vorbis file
/// </summary>
/// <param name="source">the source file to retrieve data from</param>
/// <returns></returns>
public Info RetrieveSourceInfo(VorbisFileInstance source)
{
Info[] formatInfo = source.vorbisFile.getInfo();
if (formatInfo.Length < 1 || formatInfo[0] == null)
throw new ArgumentException("NO CLIP INFORMATION");
Info sourceInfo = formatInfo[0];
return sourceInfo;
}
public void StopFile(VorbisFileInstance audioFile)
{
foreach(AudioSource source in AudioSources)
{
try
{
source.PauseSource(audioFile);
source.Dispose();
return;
}
catch (Exception e)
{
Console.WriteLine("Cannot remove source");
}
}
}
public int bisect_forward_serialno(long begin, long searched, long end, int currentno, int m, VorbisFileInstance instance)
{
long endsearched=end;
long next=end;
Page page=new Page();
int ret;
while(searched<endsearched)
{
long bisect;
if(endsearched-searched<CHUNKSIZE)
{
bisect=searched;
}
else
{
bisect=(searched+endsearched)/2;
}
seek_helper(bisect, instance);
ret = get_next_page(page, -1, instance);
if(ret==OV_EREAD) return OV_EREAD;
if(ret<0 || page.serialno()!=currentno)
{
endsearched=bisect;
if(ret>=0)next=ret;
}
else
{
searched=ret+page.header_len+page.body_len;
}
}
seek_helper(next, instance);
ret = get_next_page(page, -1, instance);
if(ret==OV_EREAD) return OV_EREAD;
if(searched>=end || ret==-1)
{
links=m+1;
offsets=new long[m+2];
offsets[m+1]=searched;
}
else
{
ret=bisect_forward_serialno(next, offset, end, page.serialno(), m+1, instance);
if(ret==OV_EREAD)return OV_EREAD;
}
offsets[m]=begin;
return 0;
}
// last step of the OggVorbis_File initialization; get all the
// vorbis_info structs and PCM positions. Only called by the seekable
// initialization (local stream storage is hacked slightly; pay
// attention to how that's done)
public void prefetch_all_headers(Info first_i,Comment first_c, int dataoffset,
VorbisFileInstance instance)
{
Page og=new Page();
int ret;
vi=new Info[links];
vc=new Comment[links];
dataoffsets=new long[links];
pcmlengths=new long[links];
serialnos=new int[links];
for(int i=0;i<links;i++)
{
if(first_i!=null && first_c!=null && i==0)
{
// we already grabbed the initial header earlier. This just
// saves the waste of grabbing it again
// !!!!!!!!!!!!!
vi[i]=first_i;
//memcpy(vf->vi+i,first_i,sizeof(vorbis_info));
vc[i]=first_c;
//memcpy(vf->vc+i,first_c,sizeof(vorbis_comment));
dataoffsets[i]=dataoffset;
}
else
{
// seek to the location of the initial header
seek_helper(offsets[i], instance); //!!!
if (fetch_headers(vi[i], vc[i], null, null, instance) == -1)
{
Console.Error.WriteLine("Error opening logical bitstream #"+(i+1)+"\n");
dataoffsets[i]=-1;
}
else
{
dataoffsets[i]=offset;
instance.os.clear();
}
}
// get the serial number and PCM length of this link. To do this,
// get the last page of the stream
long end=offsets[i+1]; //!!!
seek_helper(end, instance);
while(true)
{
ret=get_prev_page(og, instance);
if(ret==-1)
{
// this should not be possible
Console.Error.WriteLine("Could not find last page of logical "+
"bitstream #"+(i)+"\n");
vi[i].clear();
vc[i].clear();
break;
}
if(og.granulepos()!=-1)
{
serialnos[i]=og.serialno();
pcmlengths[i]=og.granulepos();
break;
}
}
}
}
/// <summary>
/// Begins playing the given clip.
/// </summary>
/// <param name="file">The clip to play.</param>
public void Play(VorbisFileInstance clip)
{
DequeuUsedBuffers();
CurrentFormat = DetermineFormat(clip);
CurrentRate = DetermineRate(clip);
CurrentClip = clip;
eof = false;
// Buffer initial audio
int usedBuffers = 0;
for (int i = 0; i < BufferCount; i++)
{
int bytesRead = clip.read(SegmentBuffer, SegmentBuffer.Length,
_BIGENDIANREADMODE, _WORDREADMODE, _SGNEDREADMODE, null);
if (bytesRead > 0)
{
// Buffer the segment
AL.BufferData(Buffers[i], CurrentFormat, SegmentBuffer, bytesRead,
CurrentRate);
usedBuffers++;
}
else if (bytesRead == 0)
{
// Clip is too small to fill the initial buffer, so stop
// buffering.
break;
}
else
{
// TODO: There was an error reading the file
throw new System.IO.IOException("Error reading or processing OGG file");
}
}
// Start playing the clip
AL.SourceQueueBuffers(Source, usedBuffers, Buffers);
AL.SourcePlay(Source);
}
public int get_next_page(Page page, long boundary, VorbisFileInstance instance)
{
if(boundary>0) boundary+=offset;
while(true)
{
int more;
if(boundary>0 && offset>=boundary)return OV_FALSE;
more = instance.oy.pageseek(page);
if(more<0){offset-=more;}
else
{
if(more==0)
{
if(boundary==0)return OV_FALSE;
// if(get_data()<=0)return -1;
int ret=get_data(instance);
if(ret==0) return OV_EOF;
if(ret<0) return OV_EREAD;
}
else
{
int ret=(int)offset; //!!!
offset+=more;
return ret;
}
}
}
}
/// <summary>
/// Determines the format of the given audio clip.
/// </summary>
/// <param name="clip">The clip to determine the format of.</param>
/// <returns>The audio format.</returns>
public static ALFormat DetermineFormat(VorbisFileInstance clip)
{
// TODO: Should probably do more than just check the format of the first stream.
Info[] clipInfo = clip.vorbisFile.getInfo();
if (clipInfo.Length < 1 || clipInfo[0] == null)
throw new ArgumentException("Audio clip does not have track information");
Info info = clipInfo[0];
// The number of channels is determined by the clip. The bit depth
// however is the choice of the player. If desired, 8-bit audio
// could be supported here.
if (info.channels == 1)
{
return ALFormat.Mono16;
}
else if (info.channels == 2)
{
return ALFormat.Stereo16;
}
else
{
throw new NotImplementedException("Only mono and stereo are implemented. Audio has too many channels.");
}
}
/// <summary>
/// Determines the rate of the given audio clip.
/// </summary>
/// <param name="clip">The clip to determine the rate of.</param>
/// <returns>The audio rate.</returns>
public int DetermineRate(VorbisFileInstance clip)
{
// TODO: Should probably do more than just check the format of the first stream.
Info[] clipInfo = clip.vorbisFile.getInfo();
if (clipInfo.Length < 1 || clipInfo[0] == null)
throw new ArgumentException("Audio clip does not have track information");
Info info = clipInfo[0];
return info.rate;
}
// DETERMINES THE ALFORMAT FOR A GIVEN SOURCE
public ALFormat DetermineSourceFormat(VorbisFileInstance source)
{
Info sourceInfo = RetrieveSourceInfo(source);
if (sourceInfo.channels == 1)
{
return ALFormat.Mono16;
}
else if (sourceInfo.channels == 2)
{
return ALFormat.Stereo16;
}
else
{
throw new NotImplementedException("Only mono and stereo are implemented. Audio has too many channels.");
}
}
// PAUSE
public void PauseSource(VorbisFileInstance source)
{
// TO DO
AL.SourcePause(Source);
}
// PLAY
public void PlaySource(VorbisFileInstance source)
{
// Remove any empty buffers
RemoveEmptyBuffers();
// Set up all the source parameters
AudioFormat = DetermineSourceFormat(source);
AudioRate = DetermineSourceRate(source);
// Initialize the source to play
SourceFile = source;
FileHasEnded = false;
// Start buffer
int processedBuffers = 0;
for (int i = 0; i < BufferCount; i++)
{
int bytesRead = source.read(SegmentBuffer, SegmentBuffer.Length, _BIGENDIANREADMODE, _WORDREADMODE, _SGNEDREADMODE, null);
if (bytesRead > 0)
{
AL.BufferData(Buffers[i], AudioFormat, SegmentBuffer, bytesRead, AudioRate);
processedBuffers++;
}
else if (bytesRead == 0)
{
break;
}
else
{
throw new System.IO.IOException("Unable to open OGG File");
}
}
// Play buffered clip
AL.SourceQueueBuffers(Source, processedBuffers, Buffers);
AL.SourcePlay(Source);
}
public int get_data(VorbisFileInstance instance)
{
int index=instance.oy.buffer(CHUNKSIZE);
byte[] buffer = instance.oy.data;
// int bytes=callbacks.read_func(buffer, index, 1, CHUNKSIZE, datasource);
int bytes=0;
try
{
bytes=datasource.Read(buffer, index, CHUNKSIZE);
}
catch(Exception e)
{
Console.Error.WriteLine(e.Message);
return OV_EREAD;
}
instance.oy.wrote(bytes);
if(bytes==-1)
{
bytes=0;
}
return bytes;
}
/// <summary>
/// Plays the audio clip on the first free channel.
/// </summary>
/// <param name="clip">The audio clip to play.</param>
public void PlayClip(VorbisFileInstance clip)
{
// TODO: If all channels are busy, the clip will be ignored. There must be a more elegant way.
foreach (AudioChannel channel in Channels)
{
try
{
if (channel.IsFree)
{
channel.Play(clip);
return;
}
}
catch (Exception e)
{
#if DEBUG
Debug.Print(e.StackTrace);
#endif
}
}
}
public void seek_helper(long offst, VorbisFileInstance instance)
{
//callbacks.seek_func(datasource, offst, SEEK_SET);
fseek(datasource, offst, SEEK_SET);
this.offset=offst;
instance.oy.reset();
}
// Play Call
public void PlayFile(VorbisFileInstance audioFile)
{
foreach (AudioSource source in AudioSources)
{
try
{
if (source.IsFree)
{
source.PlaySource(audioFile);
return;
}
}
catch (Exception e)
{
//Console.WriteLine("AudioManager threw exception!");
//Console.WriteLine(e.StackTrace);
}
}
}
private int get_prev_page(Page page, VorbisFileInstance instance)
{
long begin=offset; //!!!
int ret;
int offst=-1;
while(offst==-1)
{
begin-=CHUNKSIZE;
if(begin<0)
begin=0;
seek_helper(begin, instance);
while(offset<begin+CHUNKSIZE)
{
ret=get_next_page(page, begin+CHUNKSIZE-offset, instance);
if(ret==OV_EREAD){ return OV_EREAD; }
if(ret<0){ break; }
else{ offst=ret; }
}
}
seek_helper(offst, instance); //!!!
ret=get_next_page(page, CHUNKSIZE, instance);
if(ret<0)
{
//System.err.println("Missed page fencepost at end of logical bitstream Exiting");
//System.exit(1);
return OV_EFAULT;
}
return offst;
}
public void PlayFile(VorbisFileInstance audioFile, out AudioSource currentSource)
{
currentSource = null;
foreach (AudioSource source in AudioSources)
{
try
{
if (source.IsFree)
{
Thread.Sleep(500);
source.PlaySource(audioFile);
currentSource = source;
return;
}
}
catch (Exception e)
{
//Console.WriteLine("AudioManager threw exception!");
//Console.WriteLine(e.StackTrace);
//currentSource = null;
}
}
}
// uses the local ogg_stream storage in vf; this is important for
// non-streaming input sources
public int fetch_headers(Info vi, Comment vc, int[] serialno, Page og_ptr, VorbisFileInstance instance)
{
//System.err.println("fetch_headers");
Page og=new Page();
Packet op=new Packet();
int ret;
if(og_ptr==null)
{
ret = get_next_page(og, CHUNKSIZE, instance);
if(ret==OV_EREAD)return OV_EREAD;
if(ret<0) return OV_ENOTVORBIS;
og_ptr=og;
}
if(serialno!=null)serialno[0]=og_ptr.serialno();
instance.os.init(og_ptr.serialno());
// extract the initial header from the first page and verify that the
// Ogg bitstream is in fact Vorbis data
vi.init();
vc.init();
int i=0;
while(i<3)
{
instance.os.pagein(og_ptr);
while(i<3)
{
int result = instance.os.packetout(op);
if(result==0)break;
if(result==-1)
{
Console.Error.WriteLine("Corrupt header in logical bitstream.");
//goto bail_header;
vi.clear();
vc.clear();
instance.os.clear();
return -1;
}
if(vi.synthesis_headerin(vc, op)!=0)
{
Console.Error.WriteLine("Illegal header in logical bitstream.");
//goto bail_header;
vi.clear();
vc.clear();
instance.os.clear();
return -1;
}
i++;
}
if(i<3)
if(get_next_page(og_ptr, 1, instance)<0)
{
Console.Error.WriteLine("Missing header in logical bitstream.");
//goto bail_header;
vi.clear();
vc.clear();
instance.os.clear();
return -1;
}
}
return 0;
}
public void PauseFile(VorbisFileInstance audioFile)
{
foreach (AudioSource source in AudioSources)
{
try
{
source.PauseSource(audioFile);
return;
}
catch (Exception e)
{
Console.WriteLine("issue with {0}", e);
}
}
}
public VorbisFileInstance makeInstance()
{
VorbisFileInstance instance = new VorbisFileInstance(this);
return instance;
}
// DETERMINE THE RATE OF A GIVEN SOURCE
public int DetermineSourceRate(VorbisFileInstance source)
{
Info sourceInfo = RetrieveSourceInfo(source);
return sourceInfo.rate;
}
