Convert rc_max_intra_bitrate_pct to control

Since this is the only ABI incompatible change since the last release,
convert it to use the control interface instead. The member of the
configuration struct is replaced with the VP8E_SET_MAX_INTRA_BITRATE_PCT
control.

More significant API changes were expected to be forthcoming when this
control was first introduced, and while they continue to be expected,
it's not worth breaking compatibility for only this change.

Change-Id: I799d8dbe24c8bc9c241e0b7743b2b64f81327d59
diff --git a/vp8/vp8_cx_iface.c b/vp8/vp8_cx_iface.c
index d72d4b2..ca4e505 100644
--- a/vp8/vp8_cx_iface.c
+++ b/vp8/vp8_cx_iface.c
@@ -39,6 +39,7 @@
     unsigned int                arnr_type;        /* alt_ref filter type */
     vp8e_tuning                 tuning;
     unsigned int                cq_level;         /* constrained quality level */
+    unsigned int                rc_max_intra_bitrate_pct;
 
 };
 
@@ -71,6 +72,7 @@
             3,                          /* arnr_type*/
             0,                          /* tuning*/
             10,                         /* cq_level */
+            0,                          /* rc_max_intra_bitrate_pct */
         }
     }
 };
@@ -305,7 +307,7 @@
     }
 
     oxcf->target_bandwidth       = cfg.rc_target_bitrate;
-    oxcf->rc_max_intra_bitrate_pct = cfg.rc_max_intra_bitrate_pct;
+    oxcf->rc_max_intra_bitrate_pct = vp8_cfg.rc_max_intra_bitrate_pct;
 
     oxcf->best_allowed_q          = cfg.rc_min_quantizer;
     oxcf->worst_allowed_q         = cfg.rc_max_quantizer;
@@ -462,6 +464,7 @@
         MAP(VP8E_SET_ARNR_TYPE     ,        xcfg.arnr_type);
         MAP(VP8E_SET_TUNING,                xcfg.tuning);
         MAP(VP8E_SET_CQ_LEVEL,              xcfg.cq_level);
+        MAP(VP8E_SET_MAX_INTRA_BITRATE_PCT, xcfg.rc_max_intra_bitrate_pct);
 
     }
 
@@ -1085,6 +1088,7 @@
     {VP8E_SET_ARNR_TYPE     ,           set_param},
     {VP8E_SET_TUNING,                   set_param},
     {VP8E_SET_CQ_LEVEL,                 set_param},
+    {VP8E_SET_MAX_INTRA_BITRATE_PCT,    set_param},
     { -1, NULL},
 };
 
@@ -1117,7 +1121,6 @@
         {0},                /* rc_twopass_stats_in */
 #endif
         256,                /* rc_target_bandwidth */
-        0,                  /* rc_max_intra_bitrate_pct */
         4,                  /* rc_min_quantizer */
         63,                 /* rc_max_quantizer */
         100,                /* rc_undershoot_pct */
diff --git a/vpx/vp8cx.h b/vpx/vp8cx.h
index b6bd7fc..5275283 100644
--- a/vpx/vp8cx.h
+++ b/vpx/vp8cx.h
@@ -164,6 +164,20 @@
      * \note Valid range: 0..63
      */
     VP8E_SET_CQ_LEVEL,
+
+    /*!\brief Max data rate for Intra frames
+     *
+     * This value controls additional clamping on the maximum size of a
+     * keyframe. It is expressed as a percentage of the average
+     * per-frame bitrate, with the special (and default) value 0 meaning
+     * unlimited, or no additional clamping beyond the codec's built-in
+     * algorithm.
+     *
+     * For example, to allocate no more than 4.5 frames worth of bitrate
+     * to a keyframe, set this to 450.
+     *
+     */
+    VP8E_SET_MAX_INTRA_BITRATE_PCT,
 };
 
 /*!\brief vpx 1-D scaling mode
@@ -295,6 +309,9 @@
 VPX_CTRL_USE_TYPE(VP8E_GET_LAST_QUANTIZER,     int *)
 VPX_CTRL_USE_TYPE(VP8E_GET_LAST_QUANTIZER_64,  int *)
 
+VPX_CTRL_USE_TYPE(VP8E_SET_MAX_INTRA_BITRATE_PCT, unsigned int)
+
+
 /*! @} - end defgroup vp8_encoder */
 #include "vpx_codec_impl_bottom.h"
 #endif
diff --git a/vpx/vpx_encoder.h b/vpx/vpx_encoder.h
index 71153d5..4863dcd 100644
--- a/vpx/vpx_encoder.h
+++ b/vpx/vpx_encoder.h
@@ -433,21 +433,6 @@
         unsigned int           rc_target_bitrate;
 
 
-        /*!\brief Max data rate for Intra frames
-         *
-         * This value controls additional clamping on the maximum size of a
-         * keyframe. It is expressed as a percentage of the average
-         * per-frame bitrate, with the special (and default) value 0 meaning
-         * unlimited, or no additional clamping beyond the codec's built-in
-         * algorithm.
-         *
-         * For example, to allocate no more than 4.5 frames worth of bitrate
-         * to a keyframe, set this to 450.
-         *
-         */
-        unsigned int           rc_max_intra_bitrate_pct;
-
-
         /*
          * quantizer settings
          */
diff --git a/vpxenc.c b/vpxenc.c
index 2de881c..f0b834a 100644
--- a/vpxenc.c
+++ b/vpxenc.c
@@ -1016,14 +1016,11 @@
         "Client initial buffer size (ms)");
 static const arg_def_t buf_optimal_sz     = ARG_DEF(NULL, "buf-optimal-sz", 1,
         "Client optimal buffer size (ms)");
-static const arg_def_t max_intra_rate_pct = ARG_DEF(NULL, "max-intra-rate", 1,
-        "Max I-frame bitrate (pct)");
 static const arg_def_t *rc_args[] =
 {
     &dropframe_thresh, &resize_allowed, &resize_up_thresh, &resize_down_thresh,
     &end_usage, &target_bitrate, &min_quantizer, &max_quantizer,
     &undershoot_pct, &overshoot_pct, &buf_sz, &buf_initial_sz, &buf_optimal_sz,
-    &max_intra_rate_pct,
     NULL
 };
 
@@ -1087,12 +1084,14 @@
                                    "Material to favor", tuning_enum);
 static const arg_def_t cq_level = ARG_DEF(NULL, "cq-level", 1,
                                    "Constrained Quality Level");
+static const arg_def_t max_intra_rate_pct = ARG_DEF(NULL, "max-intra-rate", 1,
+        "Max I-frame bitrate (pct)");
 
 static const arg_def_t *vp8_args[] =
 {
     &cpu_used, &auto_altref, &noise_sens, &sharpness, &static_thresh,
     &token_parts, &arnr_maxframes, &arnr_strength, &arnr_type,
-    &tune_ssim, &cq_level, NULL
+    &tune_ssim, &cq_level, &max_intra_rate_pct, NULL
 };
 static const int vp8_arg_ctrl_map[] =
 {
@@ -1100,7 +1099,7 @@
     VP8E_SET_NOISE_SENSITIVITY, VP8E_SET_SHARPNESS, VP8E_SET_STATIC_THRESHOLD,
     VP8E_SET_TOKEN_PARTITIONS,
     VP8E_SET_ARNR_MAXFRAMES, VP8E_SET_ARNR_STRENGTH , VP8E_SET_ARNR_TYPE,
-    VP8E_SET_TUNING, VP8E_SET_CQ_LEVEL, 0
+    VP8E_SET_TUNING, VP8E_SET_CQ_LEVEL, VP8E_SET_MAX_INTRA_BITRATE_PCT, 0
 };
 #endif
 
@@ -1639,8 +1638,6 @@
             cfg.rc_end_usage = arg_parse_enum_or_int(&arg);
         else if (arg_match(&arg, &target_bitrate, argi))
             cfg.rc_target_bitrate = arg_parse_uint(&arg);
-        else if (arg_match(&arg, &max_intra_rate_pct, argi))
-            cfg.rc_max_intra_bitrate_pct = arg_parse_uint(&arg);
         else if (arg_match(&arg, &min_quantizer, argi))
             cfg.rc_min_quantizer = arg_parse_uint(&arg);
         else if (arg_match(&arg, &max_quantizer, argi))