Zap::VoiceEncoder class Reference

Zap::VoiceEncoder Class Reference

#include <voiceCodec.h>

Inheritance diagram for Zap::VoiceEncoder:

Detailed Description

The VoiceEncoder class is an abstract base class for the various voice compression algorithms supported by Zap - initially just the HawkVoice variable bitrate LPC10 codec.

It takes an arbitrary buffer of 16 bit samples at 8KHz and returns a compressed buffer. The original buffer is modified to contain any samples that were not used due to unfilled frame sizing.

Public Member Functions

ByteBufferPtr compressBuffer (ByteBufferPtr sampleBuffer)

Private Member Functions

virtual U32 getSamplesPerFrame ()=0

virtual U32 getMaxCompressedFrameSize ()=0

virtual U32 compressFrame (S16 *samplePtr, U8 *outputPtr)=0

Member Function Documentation

virtual U32 Zap::VoiceEncoder::getSamplesPerFrame ( ) [private, pure virtual]

Implemented in Zap::LPC10VoiceEncoder, and Zap::GSMVoiceEncoder.

virtual U32 Zap::VoiceEncoder::getMaxCompressedFrameSize ( ) [private, pure virtual]

Implemented in Zap::LPC10VoiceEncoder, and Zap::GSMVoiceEncoder.

virtual U32 Zap::VoiceEncoder::compressFrame ( S16 * samplePtr,

U8 * outputPtr

) [private, pure virtual]

Implemented in Zap::LPC10VoiceEncoder, and Zap::GSMVoiceEncoder.

ByteBufferPtr Zap::VoiceEncoder::compressBuffer ( ByteBufferPtr sampleBuffer )