Use dynamic stack allocation in the SILK encoder.

This makes all remaining large stack allocations use the vararray
 macros.
This continues the work of 6f2d9f50 to allow compiling with
 NONTHREADSAFE_PSEUDOSTACK to move the memory for large buffers
 off the stack for devices where it is very limited.

It also does this for some additional large buffers used by the
 PLC in the decoder.

1 files changed, 6 insertions, 1 deletions

diff --git a/silk/CNG.c b/silk/CNG.c
index d0a619c1..cc1428e1 100644
--- a/silk/CNG.c
+++ b/silk/CNG.c
@@ -30,6 +30,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #endif
 
 #include "main.h"
+#include "stack_alloc.h"
 
 /* Generates excitation for CNG LPC synthesis */
 static inline void silk_CNG_exc(
@@ -86,8 +87,8 @@ void silk_CNG(
     opus_int   i, subfr;
     opus_int32 sum_Q6, max_Gain_Q16;
     opus_int16 A_Q12[ MAX_LPC_ORDER ];
-    opus_int32 CNG_sig_Q10[ MAX_FRAME_LENGTH + MAX_LPC_ORDER ];
     silk_CNG_struct *psCNG = &psDec->sCNG;
+    SAVE_STACK;
 
     if( psDec->fs_kHz != psCNG->fs_kHz ) {
         /* Reset state */
@@ -123,6 +124,9 @@ void silk_CNG(
 
     /* Add CNG when packet is lost or during DTX */
     if( psDec->lossCnt ) {
+        VARDECL( opus_int32, CNG_sig_Q10 );
+
+        ALLOC( CNG_sig_Q10, length + MAX_LPC_ORDER, opus_int32 );
 
         /* Generate CNG excitation */
         silk_CNG_exc( CNG_sig_Q10 + MAX_LPC_ORDER, psCNG->CNG_exc_buf_Q14, psCNG->CNG_smth_Gain_Q16, length, &psCNG->rand_seed );
@@ -164,4 +168,5 @@ void silk_CNG(
     } else {
         silk_memset( psCNG->CNG_synth_state, 0, psDec->LPC_order *  sizeof( opus_int32 ) );
     }
+    RESTORE_STACK;
 }