x264与DirectShow集成

将x264静态库与DirectShow集成后。测试发现有内存泄露。代码如下。

静态库版本号为，VC++的最后一个版本：x264-snapshot-20091006-2245

int mainFun()
{
    x264_param_t param;
    cli_opt_t opt;
    int ret = 0;
    const char* outf    = "d:\\test.264";
    const char* inf        = "d:\\a.yuv";

    SetFun();
    _setmode(_fileno(stdin), _O_BINARY);
    _setmode(_fileno(stdout), _O_BINARY);

    x264_param_default(&param);
    param.i_width    = 640;
    param.i_height    = 480;

    param.rc.i_rc_method    = 0;
    param.rc.i_qp_constant    = 31;

    memset(&opt, 0, sizeof(cli_opt_t));
    if (open_file_bsf(outf, &opt.hout))
    {
        fprintf( stderr, "x264 [error]: can't open output file!");;
        exit(0);
    }

    if (open_file_yuv(inf, &opt.hin, &param ))
    {
        fprintf( stderr, "x264 [error]: can't open output file!");;
        exit(0);
    }
    //close_file_yuv( opt.hin );
    ret = Encode( &param, &opt );
    return ret;
}

 内存泄露情况如下：

Detected memory leaks!
Dumping objects ->
{182} normal block at 0x021A0040, 1500027 bytes long.
 Data: <        d   @   > CD CD CD CD CD CD CD CD 64 E3 16 00 40 00 1A 02
Object dump complete.
The program '[1696] StillCap.exe: Native' has exited with code 2 (0x2).

大约泄露1.5M，通过任务管理器与程序调试状态下，反复跟踪发现，泄露点为

x264_t *x264_encoder_open( x264_param_t *param )

{

       //....

       CHECKED_MALLOC( h->nal_buffer, h->out.i_bitstream * 3/2 + 4 );

       //...

}

即对没有对nal_buffer进行释放。

在void    x264_encoder_close  ( x264_t *h ) 函数中加入如下代码，即解决此问题。

void    x264_encoder_close  ( x264_t *h )
{
   // ....
        x264_macroblock_cache_end( h->thread[i] );
        x264_free(h->thread[i]->out.p_bitstream );
        x264_free(h->thread[i]->out.nal);
        x264_free(h->nal_buffer);// 此行为新加行。释放到nal的缓存
        x264_free(h->thread[i] );
    }
}

此Bug 在VC编译器的console平台下无法发现。

只有移植MFC的界面程序下方才有提示。