ios libx264 h264 encode

#import "X264Encode.h"#include "x264.h"#define KEY_FRAME_INTERVAL 30typedef struct{    x264_param_t * param;    x264_t *handle;    x264_picture_t * picture;    x264_nal_t  *nal;} X264EncodeParam;@interface X264Encode(){    X264EncodeParam* _x264Param;    char* _h264Buf;    long _frameCnt;}@end@implementation X264Encode- (int)initEncoder:(int)width height:(int)height bitrate:(int)bitrate{        _frameCnt = 0;    _h264Buf = (char*)malloc(width*height);        _x264Param = (X264EncodeParam *) malloc(sizeof(X264EncodeParam));    _x264Param->param = (x264_param_t *) malloc(sizeof(x264_param_t));    _x264Param->picture = (x264_picture_t *) malloc(sizeof(x264_picture_t));    x264_param_default(_x264Param->param); //set default param    //_x264Param->param->rc.i_rc_method = X264_RC_CQP;    _x264Param->param->rc.i_rc_method = X264_RC_ABR ;    _x264Param->param->rc.i_bitrate = bitrate;    _x264Param->param->i_log_level = X264_LOG_NONE;    _x264Param->param->i_width = width; //set frame width    _x264Param->param->i_height = height; //set frame height    _x264Param->param->rc.i_lookahead =0;    _x264Param->param->i_bframe=0;    _x264Param->param->i_fps_num =5;    _x264Param->param->i_fps_den = 1;    if ((_x264Param->handle = x264_encoder_open(_x264Param->param)) == 0) {        return -1;    }        x264_nal_t* p_nal;    int i_nal;    x264_encoder_headers(_x264Param->handle, &p_nal, &i_nal);    int i;    for(i=0;i<i_nal;i++)    {        if(p_nal[i].i_type == NAL_SPS)        {            //TOTO:返回sps,p_nal[i].p_payload,p_nal[i].i_payload        }        if(p_nal[i].i_type == NAL_PPS)        {            //TOTO:返回pps,p_nal[i].p_payload,p_nal[i].i_payload        }    }        /* Create a new pic */    x264_picture_alloc(_x264Param->picture, X264_CSP_I420, _x264Param->param->i_width,                       _x264Param->param->i_height);        return 0;}- (void)encodeSampleBufToH264:(CMSampleBufferRef)sampleBuffer{    }- (void)encodeBufToH264:(char*)yuv420p{    x264_picture_t pic_out;    int i_data=0;    int nNal=-1;    int len=0;    int i=0;    int nPicSize = _x264Param->param->i_width*_x264Param->param->i_height;        memcpy(_x264Param->picture->img.plane[0],yuv420p,nPicSize);    memcpy(_x264Param->picture->img.plane[1],yuv420p+nPicSize,nPicSize/4);    memcpy(_x264Param->picture->img.plane[2],yuv420p+(nPicSize*5/4),nPicSize/4);        if (_frameCnt % KEY_FRAME_INTERVAL == 0) {        _x264Param->picture->i_type = X264_TYPE_IDR;    }else{        _x264Param->picture->i_type = X264_TYPE_AUTO;    }    _frameCnt++;        if( x264_encoder_encode( _x264Param->handle, &(_x264Param->nal), &nNal, _x264Param->picture ,&pic_out) < 0 )    {        return;    }        char* pTmpOut = _h264Buf;    for (i = 0; i < nNal; i++){                memcpy(pTmpOut, _x264Param->nal[i].p_payload, _x264Param->nal[i].i_payload);        pTmpOut += _x264Param->nal[i].i_payload;        len += _x264Param->nal[i].i_payload;        //TODO:回调编码数据    }    printf("Succeed to encode frame: %5ld\tsize:%5d\n", _frameCnt, len);}- (void)free{        if(_x264Param->picture)    {        x264_picture_clean(_x264Param->picture);        free(_x264Param->picture);        _x264Param->picture  = NULL;    }    if(_x264Param->param)    {        free(_x264Param->param);        _x264Param->param = NULL;    }    if(_x264Param->handle)    {        x264_encoder_close(_x264Param->handle);    }    if (_x264Param) {        free(_x264Param);        _x264Param = NULL;    }    if (_h264Buf) {        free(_h264Buf);        _h264Buf = NULL;    }}@end