SetEncodeParam

EncodeParamT的相关定义如下：

enum EncodeParamIndex : uint32_t {
    ENCODE_PARAM_NONE,
    ENCODE_PARAM_RATE_CONTROL, //设置码控方式
    ENCODE_PARAM_BITRATE, //设置码率
    ENCODE_PARAM_FRAMERATE, //设置帧率
    ENCODE_PARAM_GOPSIZE, //设置gopsize
    ENCODE_PARAM_PROFILE, //设置profile
    ENCODE_PARAM_KEYFRAME, //设置关键帧
    ENCODE_PARAM_MAX
};
struct EncodeParamBase {
    explicit EncodeParamBase(EncodeParamIndex index) : id(index) {}
    EncodeParamIndex id;
};
struct EncodeParamRateControl : public EncodeParamBase {
    EncodeParamRateControl() : EncodeParamBase(ENCODE_PARAM_RATE_CONTROL) {}
    uint32_t rateControl = 0;
};
struct EncodeParamBitRate : public EncodeParamBase {
    EncodeParamBitRate() : EncodeParamBase(ENCODE_PARAM_BITRATE) {}
    uint32_t bitRate = 0;
};
struct EncodeParamFrameRate : public EncodeParamBase {
    EncodeParamFrameRate() : EncodeParamBase(ENCODE_PARAM_FRAMERATE) {}
    uint32_t frameRate;
};
struct EncodeParamGopsize : public EncodeParamBase {
    EncodeParamGopsize() : EncodeParamBase(ENCODE_PARAM_GOPSIZE) {}
    uint32_t gopSize;
};
struct EncodeParamProfile : public EncodeParamBase {
    EncodeParamProfile() : EncodeParamBase(ENCODE_PARAM_PROFILE) {}
    uint32_t profile;
};
struct EncodeParamKeyframe : public EncodeParamBase {
    EncodeParamKeyframe() : EncodeParamBase(ENCODE_PARAM_KEYFRAME) {}
    uint32_t n;
};
using EncodeParamT = EncodeParamBase *;