x264(一)：信息打印

x264一共有5个信息等级

#define X264_LOG_NONE          (-1)
#define X264_LOG_ERROR          0
#define X264_LOG_WARNING        1
#define X264_LOG_INFO           2
#define X264_LOG_DEBUG          3

None、error、warning、info、debug

void x264_cli_log( const char *name, int i_level, const char *fmt, ... )
{
	// cli_log_level 是打印的log等级
	// 只打印 等级<= cli_log_level 的信息
	//  默认是 2 
    if( i_level > cli_log_level )
        return;
    char *s_level;
    switch( i_level )
    {
        case X264_LOG_ERROR:
            s_level = "error";
            break;
        case X264_LOG_WARNING:
            s_level = "warning";
            break;
        case X264_LOG_INFO:
            s_level = "info";
            break;
        case X264_LOG_DEBUG:
            s_level = "debug";
            break;
        default:
            s_level = "unknown";
            break;
    }
    fprintf( stderr, "%s [%s]: ", name, s_level );
    va_list arg;
    va_start( arg, fmt );
    x264_vfprintf( stderr, fmt, arg );
    va_end( arg );
}

在其中加入一个等级，时常输出我想要的信息

#define X264_LOG_DJ            (-2)
#define X264_LOG_NONE          (-1)
#define X264_LOG_ERROR          0
#define X264_LOG_WARNING        1
#define X264_LOG_INFO           2
#define X264_LOG_DEBUG          3

void x264_cli_log( const char *name, int i_level, const char *fmt, ... )
{
    if( i_level > cli_log_level )
        return;
    char *s_level;
    switch( i_level )
    {
    	case X264_LOG_DJ:
    		s_level = "dj";
    		break;
        case X264_LOG_ERROR:
            s_level = "error";
            break;
        case X264_LOG_WARNING:
            s_level = "warning";
            break;
        case X264_LOG_INFO:
            s_level = "info";
            break;
        case X264_LOG_DEBUG:
            s_level = "debug";
            break;
        default:
            s_level = "unknown";
            break;
    }
    fprintf( stderr, "%s [%s]: ", name, s_level );
    va_list arg;
    va_start( arg, fmt );
    x264_vfprintf( stderr, fmt, arg );
    va_end( arg );
}

void x264_log_default( void *p_unused, int i_level, const char *psz_fmt, va_list arg )
{
    char *psz_prefix;
    switch( i_level )
    {
        case X264_LOG_ERROR:
            psz_prefix = "error";
            break;
        case X264_LOG_WARNING:
            psz_prefix = "warning";
            break;
        case X264_LOG_INFO:
            psz_prefix = "info";
            break;
        case X264_LOG_DEBUG:
            psz_prefix = "debug";
            break;
        default:
            psz_prefix = "unknown";
            break;
    }
    fprintf( stderr, "x264 [%s]: ", psz_prefix );
    x264_vfprintf( stderr, psz_fmt, arg );
}