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P25 Decoder - improved LSM decoding and IMBE audio decoding. Includes redesigned audio output class to handle automatic start/stop of audio playback based on availability of audio data.

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dennis.sheirer
2015-06-08 01:05:19 +00:00
parent 5dd4454c4c
commit 31482a1014
32 changed files with 366 additions and 432 deletions
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50
src/audio/AudioFormats.java Normal file
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package audio;
import javax.sound.sampled.AudioFormat;
public class AudioFormats
{
public static final AudioFormat.Encoding IMBE_ENCODING =
new AudioFormat.Encoding( "IMBE" );
public static final boolean LITTLE_ENDIAN = false;
public static final boolean BIG_ENDIAN = true;
public static final float IMBE_FRAME_RATE = 50;
public static final float IMBE_SAMPLE_RATE = 50;
public static final float PCM_8KHZ_RATE = 8000;
public static final float PCM_48KHZ_RATE = 48000;
public static final int IMBE_FRAME_SIZE_BYTES = 18;
public static final int IMBE_SAMPLE_SIZE_BITS = 144;
public static final int ONE_CHANNEL = 1;
public static final int PCM_SAMPLE_SIZE_BITS = 16;
public static final int PCM_FRAME_SIZE_BYTES = 2;
public static AudioFormat IMBE_AUDIO_FORMAT =
new AudioFormat( IMBE_ENCODING,
IMBE_SAMPLE_RATE,
IMBE_SAMPLE_SIZE_BITS,
ONE_CHANNEL,
IMBE_FRAME_SIZE_BYTES,
IMBE_FRAME_RATE,
LITTLE_ENDIAN );
public static AudioFormat PCM_SIGNED_8KHZ_16BITS =
new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
PCM_8KHZ_RATE,
PCM_SAMPLE_SIZE_BITS,
ONE_CHANNEL,
PCM_FRAME_SIZE_BYTES,
PCM_8KHZ_RATE,
LITTLE_ENDIAN );
public static AudioFormat PCM_SIGNED_48KHZ_16BITS =
new AudioFormat( AudioFormat.Encoding.PCM_SIGNED,
PCM_48KHZ_RATE,
PCM_SAMPLE_SIZE_BITS,
ONE_CHANNEL,
PCM_FRAME_SIZE_BYTES,
PCM_48KHZ_RATE,
LITTLE_ENDIAN );
}