de.lessvoid.nifty.sound.openal.slick.OggDecoder Maven / Gradle / Ivy
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This is an OpenAL/lwjgl based SoundDevice for Nifty GUI. It was extracted out of Slick2D to be
independent of the whole Slick2D library and to be used with none Slick2D based renderes. All credits for the
original code go to Kevin Glass and all Slick2D contributers.
The newest version!
package de.lessvoid.nifty.sound.openal.slick;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
/**
* Decode an OGG file to PCM data
*
* @author Kevin Glass
*/
public class OggDecoder {
/**
* The conversion buffer size
*/
private static final int convsize = 4096 * 4;
/**
* The buffer used to read OGG file
*/
@Nonnull
private byte[] convbuffer = new byte[convsize]; // take 8k out of the data segment, not the stack
/**
* Create a new OGG decoder
*/
public OggDecoder() {
}
/**
* Get the data out of an OGG file
*
* @param input The input stream from which to read the OGG file
* @return The data describing the OGG thats been read
* @throws IOException Indicaites a failure to read the OGG file
*/
@Nonnull
public OggData getData(@Nullable InputStream input) throws IOException {
if (input == null) {
throw new IOException("Failed to read OGG, source does not exist?");
}
ByteArrayOutputStream dataout = new ByteArrayOutputStream();
// SyncState oy = new SyncState(); // sync and verify incoming physical bitstream
// StreamState os = new StreamState(); // take physical pages, weld into a logical stream of packets
// Page og = new Page(); // one Ogg bitstream page. Vorbis packets are inside
// Packet op = new Packet(); // one raw packet of data for decode
//
// Info vi = new Info(); // struct that stores all the static vorbis bitstream settings
// Comment vc = new Comment(); // struct that stores all the bitstream user comments
// DspState vd = new DspState(); // central working state for the packet->PCM decoder
// Block vb = new Block(vd); // local working space for packet->PCM decode
//
// byte[] buffer;
// int bytes = 0;
//
// boolean bigEndian = ByteOrder.nativeOrder().equals(ByteOrder.BIG_ENDIAN);
// // Decode setup
//
// oy.init(); // Now we can read pages
//
// while (true) { // we repeat if the bitstream is chained
// int eos = 0;
//
// // grab some data at the head of the stream. We want the first page
// // (which is guaranteed to be small and only contain the Vorbis
// // stream initial header) We need the first page to get the stream
// // serialno.
//
// // submit a 4k block to libvorbis' Ogg layer
// int index = oy.buffer(4096);
//
// buffer = oy.data;
// try {
// bytes = input.read(buffer, index, 4096);
// } catch (Exception e) {
// Log.error("Failure reading in vorbis");
// Log.error(e);
// System.exit(0);
// }
// oy.wrote(bytes);
//
// // Get the first page.
// if (oy.pageout(og) != 1) {
// // have we simply run out of data? If so, we're done.
// if (bytes < 4096)
// break;
//
// // error case. Must not be Vorbis data
// Log.error("Input does not appear to be an Ogg bitstream.");
// System.exit(0);
// }
//
// // Get the serial number and set up the rest of decode.
// // serialno first; use it to set up a logical stream
// os.init(og.serialno());
//
// // extract the initial header from the first page and verify that the
// // Ogg bitstream is in fact Vorbis data
//
// // I handle the initial header first instead of just having the code
// // read all three Vorbis headers at once because reading the initial
// // header is an easy way to identify a Vorbis bitstream and it's
// // useful to see that functionality seperated out.
//
// vi.init();
// vc.init();
// if (os.pagein(og) < 0) {
// // error; stream version mismatch perhaps
// Log.error("Error reading first page of Ogg bitstream data.");
// System.exit(0);
// }
//
// if (os.packetout(op) != 1) {
// // no page? must not be vorbis
// Log.error("Error reading initial header packet.");
// System.exit(0);
// }
//
// if (vi.synthesis_headerin(vc, op) < 0) {
// // error case; not a vorbis header
// Log.error("This Ogg bitstream does not contain Vorbis audio data.");
// System.exit(0);
// }
//
// // At this point, we're sure we're Vorbis. We've set up the logical
// // (Ogg) bitstream decoder. Get the comment and codebook headers and
// // set up the Vorbis decoder
//
// // The next two packets in order are the comment and codebook headers.
// // They're likely large and may span multiple pages. Thus we reead
// // and submit data until we get our two pacakets, watching that no
// // pages are missing. If a page is missing, error out; losing a
// // header page is the only place where missing data is fatal. */
//
// int i = 0;
// while (i < 2) {
// while (i < 2) {
//
// int result = oy.pageout(og);
// if (result == 0)
// break; // Need more data
// // Don't complain about missing or corrupt data yet. We'll
// // catch it at the packet output phase
//
// if (result == 1) {
// os.pagein(og); // we can ignore any errors here
// // as they'll also become apparent
// // at packetout
// while (i < 2) {
// result = os.packetout(op);
// if (result == 0)
// break;
// if (result == -1) {
// // Uh oh; data at some point was corrupted or missing!
// // We can't tolerate that in a header. Die.
// Log.error("Corrupt secondary header. Exiting.");
// System.exit(0);
// }
// vi.synthesis_headerin(vc, op);
// i++;
// }
// }
// }
// // no harm in not checking before adding more
// index = oy.buffer(4096);
// buffer = oy.data;
// try {
// bytes = input.read(buffer, index, 4096);
// } catch (Exception e) {
// Log.error("Failed to read Vorbis: ");
// Log.error(e);
// System.exit(0);
// }
// if (bytes == 0 && i < 2) {
// Log.error("End of file before finding all Vorbis headers!");
// System.exit(0);
// }
// oy.wrote(bytes);
// }
//
// convsize = 4096 / vi.channels;
//
// // OK, got and parsed all three headers. Initialize the Vorbis
// // packet->PCM decoder.
// vd.synthesis_init(vi); // central decode state
// vb.init(vd); // local state for most of the decode
// // so multiple block decodes can
// // proceed in parallel. We could init
// // multiple vorbis_block structures
// // for vd here
//
// float[][][] _pcm = new float[1][][];
// int[] _index = new int[vi.channels];
// // The rest is just a straight decode loop until end of stream
// while (eos == 0) {
// while (eos == 0) {
//
// int result = oy.pageout(og);
// if (result == 0)
// break; // need more data
// if (result == -1) { // missing or corrupt data at this page position
// Log.error("Corrupt or missing data in bitstream; continuing...");
// } else {
// os.pagein(og); // can safely ignore errors at
// // this point
// while (true) {
// result = os.packetout(op);
//
// if (result == 0)
// break; // need more data
// if (result == -1) { // missing or corrupt data at this page position
// // no reason to complain; already complained above
// } else {
// // we have a packet. Decode it
// int samples;
// if (vb.synthesis(op) == 0) { // test for success!
// vd.synthesis_blockin(vb);
// }
//
// // **pcm is a multichannel float vector. In stereo, for
// // example, pcm[0] is left, and pcm[1] is right. samples is
// // the size of each channel. Convert the float values
// // (-1.<=range<=1.) to whatever PCM format and write it out
//
// while ((samples = vd.synthesis_pcmout(_pcm,
// _index)) > 0) {
// float[][] pcm = _pcm[0];
// //boolean clipflag = false;
// int bout = (samples < convsize ? samples
// : convsize);
//
// // convert floats to 16 bit signed ints (host order) and
// // interleave
// for (i = 0; i < vi.channels; i++) {
// int ptr = i * 2;
// //int ptr=i;
// int mono = _index[i];
// for (int j = 0; j < bout; j++) {
// int val = (int) (pcm[i][mono + j] * 32767.);
// // short val=(short)(pcm[i][mono+j]*32767.);
// // int val=(int)Math.round(pcm[i][mono+j]*32767.);
// // might as well guard against clipping
// if (val > 32767) {
// val = 32767;
// //clipflag = true;
// }
// if (val < -32768) {
// val = -32768;
// //clipflag = true;
// }
// if (val < 0)
// val = val | 0x8000;
//
// if (bigEndian) {
// convbuffer[ptr] = (byte) (val >>> 8);
// convbuffer[ptr + 1] = (byte) (val);
// } else {
// convbuffer[ptr] = (byte) (val);
// convbuffer[ptr + 1] = (byte) (val >>> 8);
// }
// ptr += 2 * (vi.channels);
// }
// }
//
// dataout.write(convbuffer, 0, 2 * vi.channels * bout);
//
// vd.synthesis_read(bout); // tell libvorbis how
// // many samples we
// // actually consumed
// }
// }
// }
// if (og.eos() != 0)
// eos = 1;
// }
// }
// if (eos == 0) {
// index = oy.buffer(4096);
// if (index >= 0) {
// buffer = oy.data;
// try {
// bytes = input.read(buffer, index, 4096);
// } catch (Exception e) {
// Log.error("Failure during vorbis decoding");
// Log.error(e);
// return null;
// }
// } else {
// bytes = 0;
// }
// oy.wrote(bytes);
// if (bytes == 0)
// eos = 1;
// }
// }
//
// // clean up this logical bitstream; before exit we see if we're
// // followed by another [chained]
//
// os.clear();
//
// // ogg_page and ogg_packet structs always point to storage in
// // libvorbis. They're never freed or manipulated directly
//
// vb.clear();
// vd.clear();
// vi.clear(); // must be called last
// }
//
// // OK, clean up the framer
// oy.clear();
// OggData ogg = new OggData();
// ogg.channels = vi.channels;
// ogg.rate = vi.rate;
OggInputStream oggInput = new OggInputStream(input);
//boolean done = false;
while (!oggInput.atEnd()) {
dataout.write(oggInput.read());
}
OggData ogg = new OggData();
ogg.channels = oggInput.getChannels();
ogg.rate = oggInput.getRate();
byte[] data = dataout.toByteArray();
ogg.data = ByteBuffer.allocateDirect(data.length);
ogg.data.put(data);
ogg.data.rewind();
return ogg;
}
}
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