android解码ogg pcm,GitHub - vincentjames501/libvorbis-libogg-android: JNI Android wrapper for encoding...
libvorbis - Vorbis Encoder/Decoder example for Android/JNI
libvorbis - Vorbis Encoder/Decoder example for Android/JNI.
Purpose
The purpose of this project is to demonstrate how Android can use a JNI wrapper around the libvorbis library to both encode PCM data, and decode a ogg/vorbis bitstream
Usage
Press the "Start Recording" button to start recording, then press the "Stop Recording" button to stop recording.
Recorded content is saved saveTo.ogg on the external storage location.
Press the "Start Playing" button to start playing the recorded data, then press the "Stop Playing" button to stop playing or simply wait for the playback to finish on its own.
Content is played form saveTo.ogg on the external storage location
To Build
Verify the ndk-build tool is in your path and simply execute ./build_jni.sh from your terminal
Library Usage
Encoder
To record to a file
VorbisRecorder vorbisRecorder = new VorbisRecorder(fileToSaveTo, recordHandler);
//Start recording with a sample rate of 44KHz, 2 channels (stereo), at 0.2 quality
vorbisRecorder.start(44100, 2, 0.2f);
//or
//Start recording with a sample rate of 44KHz, 2 channels (stereo), at 128 bitrate
vorbisRecorder.start(44100, 2, 128000);
To read from other input, create a custom EncodeFeed
EncodeFeed encodeFeed = new EncodeFeed() {
@Override
public long readPCMData(byte[] pcmDataBuffer, int amountToWrite) {
//Read data from pcm data source
}
@Override
public int writeVorbisData(byte[] vorbisData, int amountToRead) {
//write encoded data to where ever
}
@Override
public void stop() {
//The native encoder has finished
}
@Override
public void stopEncoding() {
//The encoder should wrap up until the native encoder calls stop()
}
@Override
public void start() {
//The native encoder has started
}
};
VorbisRecorder vorbisRecorder = new VorbisRecorder(encodeFeed, recordHandler);
vorbisRecorder.start(...);
Decoder
Decode from file
VorbisPlayer vorbisPlayer = new VorbisPlayer(fileToPlay, playerHandler);
vorbisPlayer.start();
To write to custom output, create a custom DecodeFeed
DecodeFeed decodeFeed = new DecodeFeed() {
@Override
public int readVorbisData(byte[] buffer, int amountToWrite) {
//Read from vorbis data source
}
@Override
public void writePCMData(short[] pcmData, int amountToRead) {
//Write encoded pcm data
}
@Override
public void stop() {
//Stop called from the native decoder
}
@Override
public void startReadingHeader() {
//Called from the native decoder to read header information first
}
@Override
public void start(DecodeStreamInfo decodeStreamInfo) {
//Called from the native decoder that we're ready and have processed the header information
}
};
VorbisPlayer vorbisPlayer = new VorbisPlayer(decodeFeed);
...
License
For simplicity sake, this code is licensed under the same license as the libvorbis library from (http://xiph.org/vorbis/)
Others
Tested and working under the Nexus 4, feedback for other devices are welcome
Pull requests welcome