public void open(VirtualInputFile input) {
close();
this.input = input;
container = IContainer.make();
format = IContainerFormat.make();
packet = IPacket.make();
// open the input video file
int success = container.open(input, format, true, true);
/* int success = -1;
try {
RandomAccessFile f = new RandomAccessFile("j:/grey.avi", "r");
success = container.open(f, Type.READ, format);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
*/
if (success < 0) {
throw new RuntimeException(
"XUGGLER DECODER: could not open input: " + input.getLocation().getDecodedURL());
}
for (int streamIndex = 0; streamIndex < container.getNumStreams(); streamIndex++) {
IStreamCoder coder = container.getStream(streamIndex).getStreamCoder();
switch (coder.getCodecType()) {
case CODEC_TYPE_VIDEO:
{
videoStream = coder;
videoStreamIndex = streamIndex;
break;
}
case CODEC_TYPE_AUDIO:
{
audioStream = coder;
audioStreamIndex = streamIndex;
break;
}
default:
{
break;
}
}
}
setDecodeMode(DecodeMode.NORMAL);
}
public void decode() {
int success = videoStream.open();
if (success < 0) {
throw new RuntimeException(
"XUGGLER DECODER: could not open video decoder for container: "
+ input.getLocation().getDecodedURL());
}
IAudioSamples decodeSamples = null;
if (audioStream != null) {
success = audioStream.open();
if (success < 0) {
throw new RuntimeException(
"XUGGLER DECODER: could not open audio decoder for container: "
+ input.getLocation().getDecodedURL());
}
decodeSamples = IAudioSamples.make(1024, audioStream.getChannels());
}
IVideoPicture decodePicture =
IVideoPicture.make(
videoStream.getPixelType(), videoStream.getWidth(), videoStream.getHeight());
while (container.readNextPacket(packet) >= 0 && decodeMode != DecodeMode.STOP) {
/** Find out if this stream has a starting timestamp */
IStream stream = container.getStream(packet.getStreamIndex());
long tsOffset = 0;
if (stream.getStartTime() != Global.NO_PTS
&& stream.getStartTime() > 0
&& stream.getTimeBase() != null) {
IRational defTimeBase = IRational.make(1, (int) Global.DEFAULT_PTS_PER_SECOND);
tsOffset = defTimeBase.rescale(stream.getStartTime(), stream.getTimeBase());
}
/*
* Now we have a packet, let's see if it belongs to our video stream
*/
if (packet.getStreamIndex() == videoStreamIndex) {
int offset = 0;
while (offset < packet.getSize()) {
/*
* Now, we decode the video, checking for any errors.
*
*/
int bytesDecoded = videoStream.decodeVideo(decodePicture, packet, offset);
if (bytesDecoded < 0) {
throw new RuntimeException(
"XUGGLER: error decoding video in: " + input.getLocation().getDecodedURL());
}
if (decodePicture.getTimeStamp() != Global.NO_PTS) {
decodePicture.setTimeStamp(decodePicture.getTimeStamp() - tsOffset);
}
offset += bytesDecoded;
/*
* Some decoders will consume data in a packet, but will not be able to construct
* a full video picture yet. Therefore you should always check if you
* got a complete picture from the decoder
*/
if (decodePicture.isComplete()) {
decodedPicture(decodePicture);
}
}
} else if (audioStream != null
&& packet.getStreamIndex() == audioStreamIndex
&& decodeMode != DecodeMode.IGNORE_AUDIO) {
/*
* A packet can actually contain multiple sets of samples (or frames of samples
* in audio-decoding speak). So, we may need to call decode audio multiple
* times at different offsets in the packet's data. We capture that here.
*/
int offset = 0;
/*
* Keep going until we've processed all data
*/
while (offset < packet.getSize()) {
int bytesDecoded = audioStream.decodeAudio(decodeSamples, packet, offset);
if (bytesDecoded < 0) {
break;
// throw new RuntimeException("XUGGLER: got error decoding audio in: " +
// inputVideoFile);
}
if (decodeSamples.getTimeStamp() != Global.NO_PTS) {
decodeSamples.setTimeStamp(decodeSamples.getTimeStamp() - tsOffset);
}
offset += bytesDecoded;
/*
* Some decoder will consume data in a packet, but will not be able to construct
* a full set of samples yet. Therefore you should always check if you
* got a complete set of samples from the decoder
*/
if (decodeSamples.isComplete()) {
decodedAudioSamples(decodeSamples);
}
}
} else {
/*
* This packet isn't part of our video stream, so we just
* silently drop it.
*/
continue;
}
}
}
