ffmpeg_main_encoder.c.user

基于Linux的ffmepg decoder

#include "../../libavcodec/avcodec.h"
#include <stdio.h>
#include <assert.h>

//#include "ftmcp_api.h"
//#include "portab.h"
//#include "xvid.h"
//#include "encoder.h"
//#include "motion.h"
//#include "map_driver.h"
#include "Mp4Venc.h"
#include "../faraday_mpeg4_common/dev_mem.h"

#include "./enc_test_mem.h"


typedef struct FmpegEncContext {
	void * pEnc;
	AVFrame picture;
	int frame_count;
	unsigned char *bitstream_phy_buffer;
	unsigned char *bitstream_virt_buffer;
} FmpegEncContext;


// --------------------------------------------------------------------
//	return
//		0 ==> failure
//		other ==> encoder handle
// --------------------------------------------------------------------
int enc_init(AVCodecContext *avctx)
{
	FmpegEncContext *s = avctx->priv_data;
	FMP4_ENC_PARAM enc_param;
	unsigned int * base;

//++ Foster    
//	base = (unsigned int *)ioremap(0x90910000, 0x100000);
	base = (unsigned int *)ioremap(0x90700000, 0x100000);
//-- Foster
	if (base == 0) {			/// maping failure
		printf("mpeg4 maping failure\n");
		return -1;
	}
//	printf("mpeg4 virt addr = 0x%x\n", base);

	// pass parameter from ffmpeg to this encoder
	avctx->coded_frame = &s->picture;
	// set the encoding parameters
	enc_param.pu32BaseAddr = base;
	enc_param.u32BitRate=avctx->bit_rate / 1000;
	enc_param.u32FrameWidth=avctx->width;
	enc_param.u32FrameHeight=avctx->height;
	enc_param.fFrameRate=(float)avctx->frame_rate/(float)avctx->frame_rate_base;
	enc_param.u32InitialQuant=4;
	enc_param.u32IPInterval=15;
	enc_param.bShortHeader=0;
//++ Foster
	enc_param.bEnable4MV=0;
//	enc_param.bEnable4MV=1;

	enc_param.bH263Quant=1;
	enc_param.bResyncMarker=0;
#if 0 //ivan
	enc_param.u32MaxQuant=31;
	enc_param.u32MinQuant=1;
#else
	enc_param.u32MaxQuant=avctx->qmax;
	enc_param.u32MinQuant=avctx->qmin;
#endif
//++ Foster
//	enc_param.u32Quant=16;
	if(avctx->bit_rate)
		enc_param.u32Quant=0;
	else
		enc_param.u32Quant=2;
    
    enc_param.pu8ReConFrameCur=NULL;
    enc_param.pu8ReConFrameRef=NULL;
    enc_param.p16ACDC=NULL;
    
    // to install the DMA memory allocation function 
    
    enc_param.pfnDmaMalloc=Enc_TM_DmaMalloc;
    enc_param.pfnDmaFree=Enc_TM_DmaFree;
    if((s->bitstream_virt_buffer = (unsigned char *) Enc_TM_DmaMalloc(
                        enc_param.u32FrameWidth*enc_param.u32FrameHeight*3/2,
                        16,16,&s->bitstream_phy_buffer))==NULL){
      return 0;
	}
    // set the encoded bitstream buffer for one single frame
    enc_param.pu8BitstreamAddr=s->bitstream_phy_buffer; 
//-- Foster

	// to create the encoder object
	s->pEnc=FMpeg4EncCreate(&enc_param);
	s->frame_count = 0;
	if(!s->pEnc){
		printf("FMpeg4EncCreate return fail\n");
		iounmap((unsigned char *)base, 0x100000);
		return -1;
	}

	return 0;
}

int enc_close(AVCodecContext *avctx)
{
	FmpegEncContext *s = avctx->priv_data;
	// free the allocated bitstream buffer for one single frame
//++ Foster
    Enc_TM_DmaFree(s->bitstream_virt_buffer,s->bitstream_phy_buffer);
//-- Foster
	// release the encoder object
	FMpeg4EncDestroy(s->pEnc);
	return 0;
}
// --------------------------------------------------------------------
//	input:
//		y_phys = 0 ==> not coded
//				 other ==> coded,