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fix(windows): vendor audiopus_sys + patch libopus for clang-cl SIMD
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cargo-xwin drives the Windows MSVC cross-compile via clang-cl, under
which CMake sets MSVC=1 — causing libopus 1.3.1's `if(NOT MSVC)` guards
to skip the per-file `-msse4.1` / `-mssse3` COMPILE_FLAGS that its x86
SIMD source files need. Clang-cl (unlike real cl.exe) still honors
Clang's target-feature system, so those files then fail to compile
with "always_inline function '_mm_cvtepi16_epi32' requires target
feature 'sse4.1'" errors across silk/NSQ_sse4_1.c, NSQ_del_dec_sse4_1.c,
and VQ_WMat_EC_sse4_1.c.

Earlier attempts to fix this downstream (cargo-xwin toolchain file,
override.cmake CMAKE_C_COMPILE_OBJECT <FLAGS> replace, CFLAGS env vars)
all failed because cargo-xwin rewrites override.cmake from scratch on
every `cargo xwin build` invocation and cmake-rs's -DCMAKE_C_FLAGS=
assembly happens before toolchain FORCE sets propagate.

Fixing it upstream at the source: vendor audiopus_sys 0.2.2 into
vendor/audiopus_sys, patch its bundled opus/CMakeLists.txt to introduce
an MSVC_CL var (true only when CMAKE_C_COMPILER_ID == "MSVC", i.e. real
cl.exe), and flip the eight `if(NOT MSVC)` SIMD guards to
`if(NOT MSVC_CL)`. Clang-cl then gets the GCC-style per-file flags and
the SSE4.1 sources build cleanly. Also flip the `if(MSVC)` global /arch
block at line 445 to `if(MSVC_CL)` so only cl.exe applies /arch:AVX and
clang-cl relies purely on per-file flags (no global/per-file mixing).

Wire via [patch.crates-io] in the workspace root Cargo.toml; the patch
is resolved relative to the workspace root as `vendor/audiopus_sys`.

Upstream context: xiph/opus#256, xiph/opus PR #257 (both stale).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Siavash Sameni
2026-04-10 14:12:59 +04:00
parent 53f57eea07
commit 0683dde5d3
423 changed files with 103000 additions and 2 deletions
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267
vendor/audiopus_sys/opus/silk/A2NLSF.c vendored Normal file
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/***********************************************************************
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.
***********************************************************************/
/* Conversion between prediction filter coefficients and NLSFs */
/* Requires the order to be an even number */
/* A piecewise linear approximation maps LSF <-> cos(LSF) */
/* Therefore the result is not accurate NLSFs, but the two */
/* functions are accurate inverses of each other */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "SigProc_FIX.h"
#include "tables.h"
/* Number of binary divisions, when not in low complexity mode */
#define BIN_DIV_STEPS_A2NLSF_FIX 3 /* must be no higher than 16 - log2( LSF_COS_TAB_SZ_FIX ) */
#define MAX_ITERATIONS_A2NLSF_FIX 16
/* Helper function for A2NLSF(..) */
/* Transforms polynomials from cos(n*f) to cos(f)^n */
static OPUS_INLINE void silk_A2NLSF_trans_poly(
opus_int32 *p, /* I/O Polynomial */
const opus_int dd /* I Polynomial order (= filter order / 2 ) */
)
{
opus_int k, n;
for( k = 2; k <= dd; k++ ) {
for( n = dd; n > k; n-- ) {
p[ n - 2 ] -= p[ n ];
}
p[ k - 2 ] -= silk_LSHIFT( p[ k ], 1 );
}
}
/* Helper function for A2NLSF(..) */
/* Polynomial evaluation */
static OPUS_INLINE opus_int32 silk_A2NLSF_eval_poly( /* return the polynomial evaluation, in Q16 */
opus_int32 *p, /* I Polynomial, Q16 */
const opus_int32 x, /* I Evaluation point, Q12 */
const opus_int dd /* I Order */
)
{
opus_int n;
opus_int32 x_Q16, y32;
y32 = p[ dd ]; /* Q16 */
x_Q16 = silk_LSHIFT( x, 4 );
if ( opus_likely( 8 == dd ) )
{
y32 = silk_SMLAWW( p[ 7 ], y32, x_Q16 );
y32 = silk_SMLAWW( p[ 6 ], y32, x_Q16 );
y32 = silk_SMLAWW( p[ 5 ], y32, x_Q16 );
y32 = silk_SMLAWW( p[ 4 ], y32, x_Q16 );
y32 = silk_SMLAWW( p[ 3 ], y32, x_Q16 );
y32 = silk_SMLAWW( p[ 2 ], y32, x_Q16 );
y32 = silk_SMLAWW( p[ 1 ], y32, x_Q16 );
y32 = silk_SMLAWW( p[ 0 ], y32, x_Q16 );
}
else
{
for( n = dd - 1; n >= 0; n-- ) {
y32 = silk_SMLAWW( p[ n ], y32, x_Q16 ); /* Q16 */
}
}
return y32;
}
static OPUS_INLINE void silk_A2NLSF_init(
const opus_int32 *a_Q16,
opus_int32 *P,
opus_int32 *Q,
const opus_int dd
)
{
opus_int k;
/* Convert filter coefs to even and odd polynomials */
P[dd] = silk_LSHIFT( 1, 16 );
Q[dd] = silk_LSHIFT( 1, 16 );
for( k = 0; k < dd; k++ ) {
P[ k ] = -a_Q16[ dd - k - 1 ] - a_Q16[ dd + k ]; /* Q16 */
Q[ k ] = -a_Q16[ dd - k - 1 ] + a_Q16[ dd + k ]; /* Q16 */
}
/* Divide out zeros as we have that for even filter orders, */
/* z = 1 is always a root in Q, and */
/* z = -1 is always a root in P */
for( k = dd; k > 0; k-- ) {
P[ k - 1 ] -= P[ k ];
Q[ k - 1 ] += Q[ k ];
}
/* Transform polynomials from cos(n*f) to cos(f)^n */
silk_A2NLSF_trans_poly( P, dd );
silk_A2NLSF_trans_poly( Q, dd );
}
/* Compute Normalized Line Spectral Frequencies (NLSFs) from whitening filter coefficients */
/* If not all roots are found, the a_Q16 coefficients are bandwidth expanded until convergence. */
void silk_A2NLSF(
opus_int16 *NLSF, /* O Normalized Line Spectral Frequencies in Q15 (0..2^15-1) [d] */
opus_int32 *a_Q16, /* I/O Monic whitening filter coefficients in Q16 [d] */
const opus_int d /* I Filter order (must be even) */
)
{
opus_int i, k, m, dd, root_ix, ffrac;
opus_int32 xlo, xhi, xmid;
opus_int32 ylo, yhi, ymid, thr;
opus_int32 nom, den;
opus_int32 P[ SILK_MAX_ORDER_LPC / 2 + 1 ];
opus_int32 Q[ SILK_MAX_ORDER_LPC / 2 + 1 ];
opus_int32 *PQ[ 2 ];
opus_int32 *p;
/* Store pointers to array */
PQ[ 0 ] = P;
PQ[ 1 ] = Q;
dd = silk_RSHIFT( d, 1 );
silk_A2NLSF_init( a_Q16, P, Q, dd );
/* Find roots, alternating between P and Q */
p = P; /* Pointer to polynomial */
xlo = silk_LSFCosTab_FIX_Q12[ 0 ]; /* Q12*/
ylo = silk_A2NLSF_eval_poly( p, xlo, dd );
if( ylo < 0 ) {
/* Set the first NLSF to zero and move on to the next */
NLSF[ 0 ] = 0;
p = Q; /* Pointer to polynomial */
ylo = silk_A2NLSF_eval_poly( p, xlo, dd );
root_ix = 1; /* Index of current root */
} else {
root_ix = 0; /* Index of current root */
}
k = 1; /* Loop counter */
i = 0; /* Counter for bandwidth expansions applied */
thr = 0;
while( 1 ) {
/* Evaluate polynomial */
xhi = silk_LSFCosTab_FIX_Q12[ k ]; /* Q12 */
yhi = silk_A2NLSF_eval_poly( p, xhi, dd );
/* Detect zero crossing */
if( ( ylo <= 0 && yhi >= thr ) || ( ylo >= 0 && yhi <= -thr ) ) {
if( yhi == 0 ) {
/* If the root lies exactly at the end of the current */
/* interval, look for the next root in the next interval */
thr = 1;
} else {
thr = 0;
}
/* Binary division */
ffrac = -256;
for( m = 0; m < BIN_DIV_STEPS_A2NLSF_FIX; m++ ) {
/* Evaluate polynomial */
xmid = silk_RSHIFT_ROUND( xlo + xhi, 1 );
ymid = silk_A2NLSF_eval_poly( p, xmid, dd );
/* Detect zero crossing */
if( ( ylo <= 0 && ymid >= 0 ) || ( ylo >= 0 && ymid <= 0 ) ) {
/* Reduce frequency */
xhi = xmid;
yhi = ymid;
} else {
/* Increase frequency */
xlo = xmid;
ylo = ymid;
ffrac = silk_ADD_RSHIFT( ffrac, 128, m );
}
}
/* Interpolate */
if( silk_abs( ylo ) < 65536 ) {
/* Avoid dividing by zero */
den = ylo - yhi;
nom = silk_LSHIFT( ylo, 8 - BIN_DIV_STEPS_A2NLSF_FIX ) + silk_RSHIFT( den, 1 );
if( den != 0 ) {
ffrac += silk_DIV32( nom, den );
}
} else {
/* No risk of dividing by zero because abs(ylo - yhi) >= abs(ylo) >= 65536 */
ffrac += silk_DIV32( ylo, silk_RSHIFT( ylo - yhi, 8 - BIN_DIV_STEPS_A2NLSF_FIX ) );
}
NLSF[ root_ix ] = (opus_int16)silk_min_32( silk_LSHIFT( (opus_int32)k, 8 ) + ffrac, silk_int16_MAX );
silk_assert( NLSF[ root_ix ] >= 0 );
root_ix++; /* Next root */
if( root_ix >= d ) {
/* Found all roots */
break;
}
/* Alternate pointer to polynomial */
p = PQ[ root_ix & 1 ];
/* Evaluate polynomial */
xlo = silk_LSFCosTab_FIX_Q12[ k - 1 ]; /* Q12*/
ylo = silk_LSHIFT( 1 - ( root_ix & 2 ), 12 );
} else {
/* Increment loop counter */
k++;
xlo = xhi;
ylo = yhi;
thr = 0;
if( k > LSF_COS_TAB_SZ_FIX ) {
i++;
if( i > MAX_ITERATIONS_A2NLSF_FIX ) {
/* Set NLSFs to white spectrum and exit */
NLSF[ 0 ] = (opus_int16)silk_DIV32_16( 1 << 15, d + 1 );
for( k = 1; k < d; k++ ) {
NLSF[ k ] = (opus_int16)silk_ADD16( NLSF[ k-1 ], NLSF[ 0 ] );
}
return;
}
/* Error: Apply progressively more bandwidth expansion and run again */
silk_bwexpander_32( a_Q16, d, 65536 - silk_LSHIFT( 1, i ) );
silk_A2NLSF_init( a_Q16, P, Q, dd );
p = P; /* Pointer to polynomial */
xlo = silk_LSFCosTab_FIX_Q12[ 0 ]; /* Q12*/
ylo = silk_A2NLSF_eval_poly( p, xlo, dd );
if( ylo < 0 ) {
/* Set the first NLSF to zero and move on to the next */
NLSF[ 0 ] = 0;
p = Q; /* Pointer to polynomial */
ylo = silk_A2NLSF_eval_poly( p, xlo, dd );
root_ix = 1; /* Index of current root */
} else {
root_ix = 0; /* Index of current root */
}
k = 1; /* Reset loop counter */
}
}
}
}