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Reinstating the DISABLE_RC_LONG_TERM_MEM macro

Reinstates this macro and truns it on in order to avoid issues
due to some frames at the end starving in harder videos.
A more acceptable solution is in the works.

Change-Id: I3c46148e86fa6114e3fed245246fb3686a9e6700

--- a/vp9/encoder/vp9_firstpass.c

+++ b/vp9/encoder/vp9_firstpass.c

@@ -61,6 +61,8 @@

 #define MIN_GF_INTERVAL             4

 #endif

+#define DISABLE_RC_LONG_TERM_MEM

+

 static void swap_yv12(YV12_BUFFER_CONFIG *a, YV12_BUFFER_CONFIG *b) {

   YV12_BUFFER_CONFIG temp = *a;

   *a = *b;

@@ -2330,7 +2332,11 @@

 }

 void vp9_twopass_postencode_update(VP9_COMP *cpi) {

+#ifdef DISABLE_RC_LONG_TERM_MEM

+  const uint64_t bits_used = cpi->rc.this_frame_target;

+#else

   const uint64_t bits_used = cpi->rc.projected_frame_size;

+#endif

   cpi->twopass.bits_left -= bits_used;

   cpi->twopass.bits_left = MAX(cpi->twopass.bits_left, 0);

   // Update bits left to the kf and gf groups to account for overshoot or