omxenctest usage print

OMXEncTest_print_usage.c

/*
    print_usage
 */
void print_usage(OMX_STRING swname)
{
    printf("usage: %s [options]\n"
           "\n"
           "  Available options:\n"
#if !defined (ENC8290) && !defined (ENCH1)  可以编码为avc 或者jpeg
           "    -O, --outputFormat               Compression format; 'avc', 'mpeg4', 'h263' or 'jpeg'\n"
#else
           "    -O, --outputFormat               Compression format; 'avc', "
#ifdef ENCH1
           "'vp8', 'webp' "
#endif
           "or 'jpeg'\n"
#endif
           "    -l, --inputFormat                Color format for output\n" 支持的输入的yuv格式
           "                                     0  yuv420packedplanar    1  yuv420packedsemiplanar\n"
           "                                     2  ycbycr                3  cbycry\n"
           "                                     4  rgb565                5  bgr565\n"
           "                                     6  rgb555                8  rgb444\n"
#if !defined (ENC8290) && !defined (ENCH1)
           "                                     10  yuv422planar\n\n"
#else
           "                                     10  rgb888\n\n"
#endif
           "    -o, --output                     File name of the output\n"  输出文件名
           "    -i, --input                      File name of the input\n"
           "    -e, --error-concealment          Use error concealment\n"
           "    -w, --lumWidthSrc                Width of source image\n"  源图片的宽度和高度
           "    -h, --lumHeightSrc               Height of source image\n"
           "    -x, --height                     Height of output image\n"   输出图片的高速和宽度
           "    -y, --width                      Width of output image\n"
           "    -X, --horOffsetSrc               Output image horizontal offset. [0]\n"  输出图片的水平和垂直偏移
           "    -Y, --verOffsetSrc               Output image vertical offset. [0]\n"
           "    -j, --inputRateNumer             Frame rate used for the input\n"   输入的帧率
           "    -f, --outputRateNumer            Frame rate used for the output\n"   输出的帧率
           "    -B, --bitsPerSecond              Bit-rate used for the output\n"   输出的比特率
           "    -v, --input-variance-file        File containing variance numbers separated with newline\n"
           "    -a, --firstVop                   First vop of input file [0]\n" 输入文件的第一个VOP
           "    -b, --lastVop                    Last vop of input file  [EOF]\n"  输入文件的最后一个VOP
           "    -s, --buffer-size                Size of allocated buffers (default provided by component) \n" 已分配的buffers大小（组件默认提供）
           "    -c, --buffer-count               count of buffers allocated for each port (30)\n"  每个port分配的buffers的数量（默认30？）
           "\n"
           "    -r, --rotation                   Rotation value, angle in degrees\n"
           "    -Z, --videostab                  Use frame stabilization\n"
           "    -T, --write-frames               Write each frame additionally to a separate file\n"
           "    -D, --write-buffers              Write each buffer additionally to a separate\n"
           "                                     file (overrides -T)\n"
           "\n", swname);

    print_avc_usage();
#if !defined (ENC8290) && !defined (ENCH1)
    print_mpeg4_usage();
    print_h263_usage();
#endif
#ifdef ENCH1
    print_vp8_usage();
    print_webp_usage();
#endif
    print_jpeg_usage();

    printf("  Return value:\n"
           "    0 = OK; failures indicated as OMX error codes\n" "\n");
}