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

1 files changed, 75 insertions, 0 deletions

diff --git a/silk/ana_filt_bank_1.c b/silk/ana_filt_bank_1.c
new file mode 100644
index 00000000..3cca817a
--- /dev/null
+++ b/silk/ana_filt_bank_1.c
@@ -0,0 +1,75 @@
+/***********************************************************************
+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"
+
+/* Coefficients for 2-band filter bank based on first-order allpass filters */
+/* old*/
+static opus_int16 A_fb1_20[ 1 ] = {  5394 << 1 };
+static opus_int16 A_fb1_21[ 1 ] = { 20623 << 1 };        /* wrap-around to negative number is intentional */
+
+/* Split signal into two decimated bands using first-order allpass filters */
+void silk_ana_filt_bank_1(
+    const opus_int16      *in,        /* I:   Input signal [N]        */
+    opus_int32            *S,         /* I/O: State vector [2]        */
+    opus_int16            *outL,      /* O:   Low band [N/2]          */
+    opus_int16            *outH,      /* O:   High band [N/2]         */
+    const opus_int32      N           /* I:   Number of input samples */
+)
+{
+    opus_int      k, N2 = silk_RSHIFT( N, 1 );
+    opus_int32    in32, X, Y, out_1, out_2;
+
+    /* Internal variables and state are in Q10 format */
+    for( k = 0; k < N2; k++ ) {
+        /* Convert to Q10 */
+        in32 = silk_LSHIFT( (opus_int32)in[ 2 * k ], 10 );
+
+        /* All-pass section for even input sample */
+        Y      = silk_SUB32( in32, S[ 0 ] );
+        X      = silk_SMLAWB( Y, Y, A_fb1_21[ 0 ] );
+        out_1  = silk_ADD32( S[ 0 ], X );
+        S[ 0 ] = silk_ADD32( in32, X );
+
+        /* Convert to Q10 */
+        in32 = silk_LSHIFT( (opus_int32)in[ 2 * k + 1 ], 10 );
+
+        /* All-pass section for odd input sample, and add to output of previous section */
+        Y      = silk_SUB32( in32, S[ 1 ] );
+        X      = silk_SMULWB( Y, A_fb1_20[ 0 ] );
+        out_2  = silk_ADD32( S[ 1 ], X );
+        S[ 1 ] = silk_ADD32( in32, X );
+
+        /* Add/subtract, convert back to int16 and store to output */
+        outL[ k ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( silk_ADD32( out_2, out_1 ), 11 ) );
+        outH[ k ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( silk_SUB32( out_2, out_1 ), 11 ) );
+    }
+}