ENCODER_main.c File Reference

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Detailed Description

This module provides encoder interface handle.

REVISION

• 12/13/2003 M.GAO
  Initial creation.

Definition in file ENCODER_main.c.

#include "../SYSTEM/sys_hardware.h"
#include "../coder/coder.h"
#include "encoder.h"

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Functions
int *	ENCODER_main (void)
	Function fetches next available encoder input upon PCM data arrival.
BOOL	ENCODER_getInputBuf (int **left, int **right)
	Function fetches next available encoder input buffer.
void	ENCODER_putInputBuf (void)
	Function advances encoder input buffer.
void	ENCODER_resetInputBuf (void)
	Function resets encoder input buffer.

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Function Documentation

BOOL ENCODER_getInputBuf (  int **  left, int **  right )

Function fetches next available encoder input buffer. Returns: TRUE if buffer is available, otherwise FALSE. Definition at line 74 of file ENCODER_main.c. References st_PCM::encode. Referenced by CODEC_linePcmGet(), CODEC_micPcmGet(), and CODEC_tunerPcmPut(). { if( 0 == frameCounter ) { pDstLeft = Pcm.encode(); pDstRight = pDstLeft + ENCODER_PIPE_FRAMELEN/2; if( NULL == pDstLeft ) { // Second attempt failed, encoder can not keep up, // out of sync. *left = NULL; *right = NULL; return FALSE; } else frameCounter++; } *left = pDstLeft; *right = pDstRight; return TRUE; }

int* ENCODER_main (  void   )

Function fetches next available encoder input upon PCM data arrival. All encoders share this same pipe interface although they might use different sized pipes. Returns: Writable pipe frame if available, otherwise NULL. Definition at line 44 of file ENCODER_main.c. References Encoder, st_ENCODER::flag, st_ENCODER::pipe, PIPE_writeNext(), and SEM_coder. Referenced by AUDIO_start(). { PIPE_Obj * pipe = &Encoder.pipe; if(Encoder.flag & ENC_PIPE_WRITENEXT_PENDING) { PIPE_writeNext(pipe); Encoder.flag &= ~ENC_PIPE_WRITENEXT_PENDING; if(SEM_count(SEM_coder) == 0) SEM_post(SEM_coder); } if( PIPE_writeFrameNum(pipe) ) { Encoder.flag |= ENC_PIPE_WRITENEXT_PENDING; return pipe->WrFrame.Frame; } if(SEM_count(SEM_coder) == 0) SEM_post(SEM_coder); return NULL; }

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