0683dde5d3
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>
55 lines
2.1 KiB
Plaintext
55 lines
2.1 KiB
Plaintext
To build this source code, simply type:
|
|
|
|
% make
|
|
|
|
If this does not work, or if you want to change the default configuration
|
|
(e.g., to compile for a fixed-point architecture), simply edit the options
|
|
in the Makefile.
|
|
|
|
An up-to-date implementation conforming to this standard is available in a
|
|
Git repository at https://gitlab.xiph.org/xiph/opus.git or on a website at:
|
|
https://opus-codec.org/
|
|
However, although that implementation is expected to remain conformant
|
|
with the standard, it is the code in this RFC that shall remain normative.
|
|
To build from the git repository instead of using this RFC, follow these
|
|
steps:
|
|
|
|
1) Clone the repository (latest implementation of this standard at the time
|
|
of publication)
|
|
|
|
% git clone https://gitlab.xiph.org/xiph/opus.git
|
|
% cd opus
|
|
|
|
2) Compile
|
|
|
|
% ./autogen.sh
|
|
% ./configure
|
|
% make
|
|
|
|
Once you have compiled the codec, there will be a opus_demo executable in
|
|
the top directory.
|
|
|
|
Usage: opus_demo [-e] <application> <sampling rate (Hz)> <channels (1/2)>
|
|
<bits per second> [options] <input> <output>
|
|
opus_demo -d <sampling rate (Hz)> <channels (1/2)> [options]
|
|
<input> <output>
|
|
|
|
mode: voip | audio | restricted-lowdelay
|
|
options:
|
|
-e : only runs the encoder (output the bit-stream)
|
|
-d : only runs the decoder (reads the bit-stream as input)
|
|
-cbr : enable constant bitrate; default: variable bitrate
|
|
-cvbr : enable constrained variable bitrate; default: unconstrained
|
|
-bandwidth <NB|MB|WB|SWB|FB> : audio bandwidth (from narrowband to fullband);
|
|
default: sampling rate
|
|
-framesize <2.5|5|10|20|40|60> : frame size in ms; default: 20
|
|
-max_payload <bytes> : maximum payload size in bytes, default: 1024
|
|
-complexity <comp> : complexity, 0 (lowest) ... 10 (highest); default: 10
|
|
-inbandfec : enable SILK inband FEC
|
|
-forcemono : force mono encoding, even for stereo input
|
|
-dtx : enable SILK DTX
|
|
-loss <perc> : simulate packet loss, in percent (0-100); default: 0
|
|
|
|
input and output are little endian signed 16-bit PCM files or opus bitstreams
|
|
with simple opus_demo proprietary framing.
|