Add copy of opus library in deps/third_party.
TBR=dannyb@google.com
Review URL: https://codereview.chromium.org/11196031
git-svn-id: svn://svn.chromium.org/chrome/trunk/deps/third_party/opus@162558 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/silk/resampler_private_up2_HQ.c b/silk/resampler_private_up2_HQ.c
new file mode 100644
index 0000000..9e6dfc9
--- /dev/null
+++ b/silk/resampler_private_up2_HQ.c
@@ -0,0 +1,113 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, 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 Internet Society, IETF or IETF Trust, nor the
+names of specific contributors, may be used to endorse or promote
+products derived from this software without specific prior written
+permission.
+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 "resampler_private.h"
+
+/* Upsample by a factor 2, high quality */
+/* Uses 2nd order allpass filters for the 2x upsampling, followed by a */
+/* notch filter just above Nyquist. */
+void silk_resampler_private_up2_HQ(
+ opus_int32 *S, /* I/O Resampler state [ 6 ] */
+ opus_int16 *out, /* O Output signal [ 2 * len ] */
+ const opus_int16 *in, /* I Input signal [ len ] */
+ opus_int32 len /* I Number of input samples */
+)
+{
+ opus_int32 k;
+ opus_int32 in32, out32_1, out32_2, Y, X;
+
+ silk_assert( silk_resampler_up2_hq_0[ 0 ] > 0 );
+ silk_assert( silk_resampler_up2_hq_0[ 1 ] > 0 );
+ silk_assert( silk_resampler_up2_hq_0[ 2 ] < 0 );
+ silk_assert( silk_resampler_up2_hq_1[ 0 ] > 0 );
+ silk_assert( silk_resampler_up2_hq_1[ 1 ] > 0 );
+ silk_assert( silk_resampler_up2_hq_1[ 2 ] < 0 );
+
+ /* Internal variables and state are in Q10 format */
+ for( k = 0; k < len; k++ ) {
+ /* Convert to Q10 */
+ in32 = silk_LSHIFT( (opus_int32)in[ k ], 10 );
+
+ /* First all-pass section for even output sample */
+ Y = silk_SUB32( in32, S[ 0 ] );
+ X = silk_SMULWB( Y, silk_resampler_up2_hq_0[ 0 ] );
+ out32_1 = silk_ADD32( S[ 0 ], X );
+ S[ 0 ] = silk_ADD32( in32, X );
+
+ /* Second all-pass section for even output sample */
+ Y = silk_SUB32( out32_1, S[ 1 ] );
+ X = silk_SMULWB( Y, silk_resampler_up2_hq_0[ 1 ] );
+ out32_2 = silk_ADD32( S[ 1 ], X );
+ S[ 1 ] = silk_ADD32( out32_1, X );
+
+ /* Third all-pass section for even output sample */
+ Y = silk_SUB32( out32_2, S[ 2 ] );
+ X = silk_SMLAWB( Y, Y, silk_resampler_up2_hq_0[ 2 ] );
+ out32_1 = silk_ADD32( S[ 2 ], X );
+ S[ 2 ] = silk_ADD32( out32_2, X );
+
+ /* Apply gain in Q15, convert back to int16 and store to output */
+ out[ 2 * k ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( out32_1, 10 ) );
+
+ /* First all-pass section for odd output sample */
+ Y = silk_SUB32( in32, S[ 3 ] );
+ X = silk_SMULWB( Y, silk_resampler_up2_hq_1[ 0 ] );
+ out32_1 = silk_ADD32( S[ 3 ], X );
+ S[ 3 ] = silk_ADD32( in32, X );
+
+ /* Second all-pass section for odd output sample */
+ Y = silk_SUB32( out32_1, S[ 4 ] );
+ X = silk_SMULWB( Y, silk_resampler_up2_hq_1[ 1 ] );
+ out32_2 = silk_ADD32( S[ 4 ], X );
+ S[ 4 ] = silk_ADD32( out32_1, X );
+
+ /* Third all-pass section for odd output sample */
+ Y = silk_SUB32( out32_2, S[ 5 ] );
+ X = silk_SMLAWB( Y, Y, silk_resampler_up2_hq_1[ 2 ] );
+ out32_1 = silk_ADD32( S[ 5 ], X );
+ S[ 5 ] = silk_ADD32( out32_2, X );
+
+ /* Apply gain in Q15, convert back to int16 and store to output */
+ out[ 2 * k + 1 ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( out32_1, 10 ) );
+ }
+}
+
+void silk_resampler_private_up2_HQ_wrapper(
+ void *SS, /* I/O Resampler state (unused) */
+ opus_int16 *out, /* O Output signal [ 2 * len ] */
+ const opus_int16 *in, /* I Input signal [ len ] */
+ opus_int32 len /* I Number of input samples */
+)
+{
+ silk_resampler_state_struct *S = (silk_resampler_state_struct *)SS;
+ silk_resampler_private_up2_HQ( S->sIIR, out, in, len );
+}