Removed all the silk_ prefixes in source file names (not symbols)

1 files changed, 77 insertions, 0 deletions

diff --git a/silk/float/LPC_inv_pred_gain_FLP.c b/silk/float/LPC_inv_pred_gain_FLP.c
new file mode 100644
index 00000000..a141d111
--- /dev/null
+++ b/silk/float/LPC_inv_pred_gain_FLP.c
@@ -0,0 +1,77 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "SigProc_FIX.h"
+#include "SigProc_FLP.h"
+
+#define RC_THRESHOLD        0.9999f
+
+/* compute inverse of LPC prediction gain, and                          */
+/* test if LPC coefficients are stable (all poles within unit circle)   */
+/* this code is based on silk_a2k_FLP()                               */
+opus_int silk_LPC_inverse_pred_gain_FLP(   /* O:   returns 1 if unstable, otherwise 0      */
+    silk_float       *invGain,               /* O:   inverse prediction gain, energy domain  */
+    const silk_float *A,                     /* I:   prediction coefficients [order]         */
+    opus_int32       order                   /* I:   prediction order                        */
+)
+{
+    opus_int   k, n;
+    double    rc, rc_mult1, rc_mult2;
+    silk_float Atmp[ 2 ][ SILK_MAX_ORDER_LPC ];
+    silk_float *Aold, *Anew;
+
+    Anew = Atmp[ order & 1 ];
+    silk_memcpy( Anew, A, order * sizeof(silk_float) );
+
+    *invGain = 1.0f;
+    for( k = order - 1; k > 0; k-- ) {
+        rc = -Anew[ k ];
+        if (rc > RC_THRESHOLD || rc < -RC_THRESHOLD) {
+            return 1;
+        }
+        rc_mult1 = 1.0f - rc * rc;
+        rc_mult2 = 1.0f / rc_mult1;
+        *invGain *= (silk_float)rc_mult1;
+        /* swap pointers */
+        Aold = Anew;
+        Anew = Atmp[ k & 1 ];
+        for( n = 0; n < k; n++ ) {
+            Anew[ n ] = (silk_float)( ( Aold[ n ] - Aold[ k - n - 1 ] * rc ) * rc_mult2 );
+        }
+    }
+    rc = -Anew[ 0 ];
+    if ( rc > RC_THRESHOLD || rc < -RC_THRESHOLD ) {
+        return 1;
+    }
+    rc_mult1 = 1.0f - rc * rc;
+    *invGain *= (silk_float)rc_mult1;
+    return 0;
+}