[x265] [PATCH 2 of 6] rc: define default setting and validations for 2 pass states

[Deepthi Nandakumar]

On Mon, Jun 16, 2014 at 12:20 AM, <aarthi at multicorewareinc.com> wrote:

> # HG changeset patch
> # User Aarthi Thirumalai<aarthi at multicorewareinc.com>
> # Date 1402857077 -19800
> #      Mon Jun 16 00:01:17 2014 +0530
> # Node ID d1f636a6dc0a11657bb25be650de60345c2952c8
> # Parent  438a03ff94830fbc17457b6f324397e643c17cba
> rc: define default setting and validations for 2 pass states
>
> diff -r 438a03ff9483 -r d1f636a6dc0a source/common/param.cpp
> --- a/source/common/param.cpp   Sun Jun 15 23:59:14 2014 +0530
> +++ b/source/common/param.cpp   Mon Jun 16 00:01:17 2014 +0530
> @@ -180,7 +180,12 @@
>      param->rc.cuTree = 1;
>      param->rc.rfConstantMax = 0;
>      param->rc.rfConstantMin = 0;
> -
> +    param->rc.pszStatIn = "x265_2pass.log";
> +    param->rc.pszStatOut = "x264_2pass.log";
> +    param->rc.complexityBlur = 20;
> +    param->rc.qblur = 0.5;
> +    param->rc.statRead = false;
> +    param->rc.statWrite = false;
>      /* Quality Measurement Metrics */
>      param->bEnablePsnr = 0;
>      param->bEnableSsim = 0;
> @@ -414,6 +419,18 @@
>
>      return 0;
>  }
> +extern "C"
> +void x265_param_apply_fastfirstpass(x265_param *param)
> +{
> +    /* Set faster options in case of turbo firstpass. */
> +    if( param->rc.statWrite && !param->rc.statRead )
> +    {
> +        param->maxNumReferences = 1;
> +        param->searchMethod = X265_DIA_SEARCH;
> +        param->bEnableEarlySkip = 1;
> +    }
>
/
Hmm, making 2-pass work correctly is priority. We can focus on these turbo
first-pass enhancements later? This could affect bitrate predictions.


> +}
> +
>
>  static int x265_atobool(const char *str, bool& bError)
>  {
> @@ -911,6 +928,8 @@
>          if (s)
>              x265_log(param, X265_LOG_WARNING, "--tune %s should be used
> if attempting to benchmark %s!\n", s, s);
>      }
> +    if (param->bOpenGOP && param->rc.statRead)
> +        param->lookaheadDepth = 0;
>
>      CHECK(param->rc.qp < -6 * (param->internalBitDepth - 8) ||
> param->rc.qp > 51,
>            "QP exceeds supported range (-QpBDOffsety to 51)");
> @@ -966,7 +985,7 @@
>            "Rate control mode is out of range");
>      CHECK(param->rdLevel < 0 || param->rdLevel > 6,
>            "RD Level is out of range");
> -    CHECK(param->bframes > param->lookaheadDepth,
> +    CHECK(param->bframes > param->lookaheadDepth && !param->rc.statRead,
>            "Lookahead depth must be greater than the max consecutive
> bframe count");
>      CHECK(param->bframes < 0,
>            "bframe count should be greater than zero");
> @@ -1045,6 +1064,9 @@
>            "Target bitrate can not be less than zero");
>      if (param->noiseReduction)
>          CHECK(100 > param->noiseReduction || param->noiseReduction >
> 1000, "Valid noise reduction range 100 - 1000");
> +    CHECK(param->rc.rateControlMode == X265_RC_CRF && param->rc.statRead,
> +          "Constant rate-factor is incompatible with 2pass");
> +
>

And CQP also?


>      return check_failed;
>  }
>
> diff -r 438a03ff9483 -r d1f636a6dc0a source/x265.cpp
> --- a/source/x265.cpp   Sun Jun 15 23:59:14 2014 +0530
> +++ b/source/x265.cpp   Mon Jun 16 00:01:17 2014 +0530
> @@ -591,6 +591,7 @@
>      }
>  #endif // if HIGH_BIT_DEPTH
>
> +    x265_param_apply_fastfirstpass(param);
>      InputFileInfo info;
>      info.filename = inputfn;
>      info.depth = inputBitDepth;
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>
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