libx264: add 'cplxblur' private option

Deprecate AVCodecContext.complexityblur

libavcodec/avcodec.h

@@ -2449,14 +2449,14 @@ typedef struct AVCodecContext {
      */
     int trellis;
 
+#if FF_API_X264_GLOBAL_OPTS
     /**
      * Reduce fluctuations in qp (before curve compression).
      * - encoding: Set by user.
      * - decoding: unused
      */
-    float complexityblur;
+    attribute_deprecated float complexityblur;
 
-#if FF_API_X264_GLOBAL_OPTS
     /**
      * in-loop deblocking filter alphac0 parameter
      * alpha is in the range -6...6

libavcodec/libx264.c

@@ -61,6 +61,7 @@ typedef struct X264Context {
     int aud;
     int mbtree;
     char *deblock;
+    float cplxblur;
 } X264Context;
 
 static void X264_log(void *p, int level, const char *fmt, va_list args)
@@ -206,8 +207,6 @@ static av_cold int X264_init(AVCodecContext *avctx)
 
     x4->params.b_deblocking_filter         = avctx->flags & CODEC_FLAG_LOOP_FILTER;
 
-    x4->params.rc.f_complexity_blur = avctx->complexityblur;
-
     x4->params.analyse.inter    = 0;
     if (avctx->partitions) {
         if (avctx->partitions & X264_PART_I4X4)
@@ -319,6 +318,8 @@ static av_cold int X264_init(AVCodecContext *avctx)
         x4->params.i_deblocking_filter_alphac0 = avctx->deblockalpha;
     if (avctx->deblockbeta)
         x4->params.i_deblocking_filter_beta    = avctx->deblockbeta;
+    if (avctx->complexityblur >= 0)
+        x4->params.rc.f_complexity_blur        = avctx->complexityblur;
     x4->params.analyse.b_ssim = avctx->flags2 & CODEC_FLAG2_SSIM;
     x4->params.b_intra_refresh = avctx->flags2 & CODEC_FLAG2_INTRA_REFRESH;
     x4->params.i_bframe_pyramid = avctx->flags2 & CODEC_FLAG2_BPYRAMID ? X264_B_PYRAMID_NORMAL : X264_B_PYRAMID_NONE;
@@ -364,6 +365,8 @@ static av_cold int X264_init(AVCodecContext *avctx)
         x4->params.analyse.i_weighted_pred = x4->weightp;
     if (x4->weightb >= 0)
         x4->params.analyse.b_weighted_bipred = x4->weightb;
+    if (x4->cplxblur >= 0)
+        x4->params.rc.f_complexity_blur = x4->cplxblur;
 
     if (x4->ssim >= 0)
         x4->params.analyse.b_ssim = x4->ssim;
@@ -482,6 +485,7 @@ static const AVOption options[] = {
     { "aud",           "Use access unit delimiters.",                     OFFSET(aud),           FF_OPT_TYPE_INT,    {-1 }, -1, 1, VE},
     { "mbtree",        "Use macroblock tree ratecontrol.",                OFFSET(mbtree),        FF_OPT_TYPE_INT,    {-1 }, -1, 1, VE},
     { "deblock",       "Loop filter parameters, in <alpha:beta> form.",   OFFSET(deblock),       FF_OPT_TYPE_STRING, { 0 },  0, 0, VE},
+    { "cplxblur",      "Reduce fluctuations in QP (before curve compression)", OFFSET(cplxblur), FF_OPT_TYPE_FLOAT,  {-1 }, -1, FLT_MAX, VE},
     { NULL },
 };
 

libavcodec/options.c

@@ -412,8 +412,8 @@ static const AVOption options[]={
 {"aud", "access unit delimiters (H.264)", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG2_AUD }, INT_MIN, INT_MAX, V|E, "flags2"},
 #endif
 {"skiprd", "RD optimal MB level residual skipping", 0, FF_OPT_TYPE_CONST, {.dbl = CODEC_FLAG2_SKIP_RD }, INT_MIN, INT_MAX, V|E, "flags2"},
-{"complexityblur", "reduce fluctuations in qp (before curve compression)", OFFSET(complexityblur), FF_OPT_TYPE_FLOAT, {.dbl = 20.0 }, FLT_MIN, FLT_MAX, V|E},
 #if FF_API_X264_GLOBAL_OPTS
+{"complexityblur", "reduce fluctuations in qp (before curve compression)", OFFSET(complexityblur), FF_OPT_TYPE_FLOAT, {.dbl = -1 }, -1, FLT_MAX, V|E},
 {"deblockalpha", "in-loop deblocking filter alphac0 parameter", OFFSET(deblockalpha), FF_OPT_TYPE_INT, {.dbl = DEFAULT }, -6, 6, V|E},
 {"deblockbeta", "in-loop deblocking filter beta parameter", OFFSET(deblockbeta), FF_OPT_TYPE_INT, {.dbl = DEFAULT }, -6, 6, V|E},
 #endif