Since there are reports of crashes in libfaad2 when called from
firefox and icecat in the function ps_decode(), this is a try
to reduce the stack footprint of faad2 decoding by making the
main arrays X_left[][] and X_right[][] use static __thread storage.

--- libfaad/sbr_dec.c	2009-01-26 23:32:31.000000000 +0100
+++ libfaad/sbr_dec.c	2015-09-11 12:44:28.305989011 +0200
@@ -602,8 +602,12 @@
     uint8_t l, k;
     uint8_t dont_process = 0;
     uint8_t ret = 0;
-    ALIGN qmf_t X_left[38][64] = {{0}};
-    ALIGN qmf_t X_right[38][64] = {{0}}; /* must set this to 0 */
+    /* 2015-09-11 jbu: make static to reduce stack footprint */
+    static __thread ALIGN qmf_t X_left[38][64];
+    static __thread ALIGN qmf_t X_right[38][64];
+    /* must set this to 0 */
+    memset(X_left, 0, sizeof(X_left));
+    memset(X_right, 0, sizeof(X_right));
 
     if (sbr == NULL)
         return 20;
--- libfaad/ps_dec.c	2009-01-26 23:32:31.000000000 +0100
+++ libfaad/ps_dec.c	2015-09-11 13:02:37.898985783 +0200
@@ -1039,10 +1039,10 @@
     const complex_t *Phi_Fract_SubQmf;
     uint8_t temp_delay_ser[NO_ALLPASS_LINKS];
     real_t P_SmoothPeakDecayDiffNrg, nrg;
-    real_t P[32][34];
-    real_t G_TransientRatio[32][34] = {{0}};
+    static __thread real_t P[32][34];
+    static __thread real_t G_TransientRatio[32][34];
     complex_t inputLeft;
-
+    memset(G_TransientRatio, 0, sizeof(G_TransientRatio));
 
     /* chose hybrid filterbank: 20 or 34 band case */
     if (ps->use34hybrid_bands)
@@ -1963,8 +1963,10 @@
 /* main Parametric Stereo decoding function */
 uint8_t ps_decode(ps_info *ps, qmf_t X_left[38][64], qmf_t X_right[38][64])
 {
-    qmf_t X_hybrid_left[32][32] = {{0}};
-    qmf_t X_hybrid_right[32][32] = {{0}};
+    static __thread qmf_t X_hybrid_left[32][32];
+    static __thread qmf_t X_hybrid_right[32][32];
+    memset(X_hybrid_left, 0, sizeof(X_hybrid_left));
+    memset(X_hybrid_right, 0, sizeof(X_hybrid_right));
 
     /* delta decoding of the bitstream data */
     ps_data_decode(ps);