Use dynamic stack allocation in the SILK encoder.
[opus.git] / silk / control_codec.c
index ecc338c..9159b18 100644 (file)
@@ -35,6 +35,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "main_FLP.h"
 #define silk_encoder_state_Fxx      silk_encoder_state_FLP
 #endif
+#include "stack_alloc.h"
 #include "tuning_parameters.h"
 #include "pitch_est_defines.h"
 
@@ -138,6 +139,7 @@ static opus_int silk_setup_resamplers(
 {
     opus_int   ret = SILK_NO_ERROR;
     opus_int32 nSamples_temp;
+    SAVE_STACK;
 
     if( psEnc->sCmn.fs_kHz != fs_kHz || psEnc->sCmn.prev_API_fs_Hz != psEnc->sCmn.API_fs_Hz )
     {
@@ -145,35 +147,38 @@ static opus_int silk_setup_resamplers(
             /* Initialize the resampler for enc_API.c preparing resampling from API_fs_Hz to fs_kHz */
             ret += silk_resampler_init( &psEnc->sCmn.resampler_state, psEnc->sCmn.API_fs_Hz, fs_kHz * 1000, 1 );
         } else {
-            /* Allocate worst case space for temporary upsampling, 8 to 48 kHz, so a factor 6 */
-            opus_int16 x_buf_API_fs_Hz[ ( 2 * MAX_FRAME_LENGTH_MS + LA_SHAPE_MS ) * MAX_API_FS_KHZ ];
-            silk_resampler_state_struct  temp_resampler_state;
+            VARDECL( opus_int16, x_buf_API_fs_Hz );
+            VARDECL( silk_resampler_state_struct, temp_resampler_state );
 #ifdef FIXED_POINT
             opus_int16 *x_bufFIX = psEnc->x_buf;
 #else
-            opus_int16 x_bufFIX[ 2 * MAX_FRAME_LENGTH + LA_SHAPE_MAX ];
+            VARDECL( opus_int16, x_bufFIX );
 #endif
+            opus_int32 nAPI_Samples_temp;
 
             nSamples_temp = silk_LSHIFT( psEnc->sCmn.frame_length, 1 ) + LA_SHAPE_MS * psEnc->sCmn.fs_kHz;
 
 #ifndef FIXED_POINT
+            ALLOC( x_bufFIX, nSamples_temp, opus_int16 );
             silk_float2short_array( x_bufFIX, psEnc->x_buf, nSamples_temp );
 #endif
 
             /* Initialize resampler for temporary resampling of x_buf data to API_fs_Hz */
-            ret += silk_resampler_init( &temp_resampler_state, silk_SMULBB( psEnc->sCmn.fs_kHz, 1000 ), psEnc->sCmn.API_fs_Hz, 0 );
+            ALLOC( temp_resampler_state, 1, silk_resampler_state_struct );
+            ret += silk_resampler_init( temp_resampler_state, silk_SMULBB( psEnc->sCmn.fs_kHz, 1000 ), psEnc->sCmn.API_fs_Hz, 0 );
 
-            /* Temporary resampling of x_buf data to API_fs_Hz */
-            ret += silk_resampler( &temp_resampler_state, x_buf_API_fs_Hz, x_bufFIX, nSamples_temp );
+            /* Calculate number of samples to temporarily upsample */
+            nAPI_Samples_temp = silk_DIV32_16( nSamples_temp * psEnc->sCmn.API_fs_Hz, silk_SMULBB( psEnc->sCmn.fs_kHz, 1000 ) );
 
-            /* Calculate number of samples that has been temporarily upsampled */
-            nSamples_temp = silk_DIV32_16( nSamples_temp * psEnc->sCmn.API_fs_Hz, silk_SMULBB( psEnc->sCmn.fs_kHz, 1000 ) );
+            /* Temporary resampling of x_buf data to API_fs_Hz */
+            ALLOC( x_buf_API_fs_Hz, nAPI_Samples_temp, opus_int16 );
+            ret += silk_resampler( temp_resampler_state, x_buf_API_fs_Hz, x_bufFIX, nSamples_temp );
 
             /* Initialize the resampler for enc_API.c preparing resampling from API_fs_Hz to fs_kHz */
             ret += silk_resampler_init( &psEnc->sCmn.resampler_state, psEnc->sCmn.API_fs_Hz, silk_SMULBB( fs_kHz, 1000 ), 1 );
 
             /* Correct resampler state by resampling buffered data from API_fs_Hz to fs_kHz */
-            ret += silk_resampler( &psEnc->sCmn.resampler_state, x_bufFIX, x_buf_API_fs_Hz, nSamples_temp );
+            ret += silk_resampler( &psEnc->sCmn.resampler_state, x_bufFIX, x_buf_API_fs_Hz, nAPI_Samples_temp );
 
 #ifndef FIXED_POINT
             silk_short2float_array( psEnc->x_buf, x_bufFIX, ( 2 * MAX_FRAME_LENGTH_MS + LA_SHAPE_MS ) * fs_kHz );
@@ -183,6 +188,7 @@ static opus_int silk_setup_resamplers(
 
     psEnc->sCmn.prev_API_fs_Hz = psEnc->sCmn.API_fs_Hz;
 
+    RESTORE_STACK;
     return ret;
 }