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target
Cargo.lock

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[package]
name = "magnum-opus"
version = "0.3.4"
authors = ["Tad Hardesty <tad@platymuus.com>", "Sergey Duck <sergeypechnikov326@gmail.com>"]
edition = "2018"
description = "Safe Rust bindings for libopus"
readme = "README.md"
license = "MIT/Apache-2.0"
keywords = ["opus", "codec", "voice", "sound", "audio"]
categories = ["api-bindings", "encoding", "compression",
"multimedia::audio", "multimedia::encoding"]
repository = "https://github.com/DuckerMan/magnum-opus"
documentation = "https://docs.rs/magnum-opus"
[build-dependencies]
target_build_utils = "0.3"
bindgen = "0.53"

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Copyright (c) 2016 Tad Hardesty
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

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# magnum-opus [![](https://meritbadge.herokuapp.com/magnum-opus)](https://crates.io/crates/magnum-opus) [![](https://img.shields.io/badge/docs-online-2020ff.svg)](https://docs.rs/magnum-opus)
### This is the fork of @SpaceManiac repo, which now is abandoned
Safe Rust bindings for libopus. The rustdoc (available through `cargo doc`)
includes brief descriptions for methods, and detailed API information can be
found at the [libopus documentation](https://opus-codec.org/docs/opus_api-1.1.2/).
## License
Licensed under either of
* Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
at your option.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
dual licensed as above, without any additional terms or conditions.

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use std::{
env,
path::{Path, PathBuf},
};
fn find_package(name: &str) -> Vec<PathBuf> {
let vcpkg_root = std::env::var("VCPKG_ROOT").unwrap();
let mut path: PathBuf = vcpkg_root.into();
let target_os = std::env::var("CARGO_CFG_TARGET_OS").unwrap();
let mut target_arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap();
if target_arch == "x86_64" {
target_arch = "x64".to_owned();
} else if target_arch == "aarch64" {
target_arch = "arm64".to_owned();
} else {
target_arch = "arm".to_owned();
}
let target = if target_os == "macos" {
"x64-osx".to_owned()
} else if target_os == "windows" {
"x64-windows-static".to_owned()
} else if target_os == "android" {
format!("{}-android-static", target_arch)
} else {
"x64-linux".to_owned()
};
println!("cargo:info={}", target);
path.push("installed");
path.push(target);
println!(
"{}",
format!("cargo:rustc-link-lib={}", name.trim_start_matches("lib"))
);
println!(
"{}",
format!(
"cargo:rustc-link-search={}",
path.join("lib").to_str().unwrap()
)
);
let include = path.join("include");
println!("{}", format!("cargo:include={}", include.to_str().unwrap()));
vec![include]
}
fn generate_bindings(ffi_header: &Path, include_paths: &[PathBuf], ffi_rs: &Path) {
#[derive(Debug)]
struct ParseCallbacks;
impl bindgen::callbacks::ParseCallbacks for ParseCallbacks {
fn int_macro(&self, name: &str, _value: i64) -> Option<bindgen::callbacks::IntKind> {
if name.starts_with("OPUS") {
Some(bindgen::callbacks::IntKind::Int)
} else {
None
}
}
}
let mut b = bindgen::Builder::default()
.header(ffi_header.to_str().unwrap())
.parse_callbacks(Box::new(ParseCallbacks))
.generate_comments(false);
for dir in include_paths {
b = b.clang_arg(format!("-I{}", dir.display()));
}
b.generate().unwrap().write_to_file(ffi_rs).unwrap();
}
fn gen_opus() {
let includes = find_package("opus");
let src_dir = env::var_os("CARGO_MANIFEST_DIR").unwrap();
let src_dir = Path::new(&src_dir);
let out_dir = env::var_os("OUT_DIR").unwrap();
let out_dir = Path::new(&out_dir);
let ffi_header = src_dir.join("opus_ffi.h");
println!("rerun-if-changed={}", ffi_header.display());
for dir in &includes {
println!("rerun-if-changed={}", dir.display());
}
let ffi_rs = out_dir.join("opus_ffi.rs");
generate_bindings(&ffi_header, &includes, &ffi_rs);
}
fn main() {
gen_opus()
}

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#include <opus/opus_multistream.h>

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// Copyright 2016 Tad Hardesty
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! High-level bindings for libopus.
//!
//! Only brief descriptions are included here. For detailed information, consult
//! the [libopus documentation](https://opus-codec.org/docs/opus_api-1.1.2/).
#![warn(missing_docs)]
mod opus_ffi;
use opus_ffi as ffi;
use std::ffi::CStr;
use std::marker::PhantomData;
use std::os::raw::c_int;
// ============================================================================
// Constants
// Generic CTLs
const OPUS_RESET_STATE: c_int = 4028; // void
const OPUS_GET_FINAL_RANGE: c_int = 4031; // out *u32
const OPUS_GET_BANDWIDTH: c_int = 4009; // out *i32
const OPUS_GET_SAMPLE_RATE: c_int = 4029; // out *i32
// Encoder CTLs
const OPUS_SET_BITRATE: c_int = 4002; // in i32
const OPUS_GET_BITRATE: c_int = 4003; // out *i32
const OPUS_SET_VBR: c_int = 4006; // in i32
const OPUS_GET_VBR: c_int = 4007; // out *i32
const OPUS_SET_VBR_CONSTRAINT: c_int = 4020; // in i32
const OPUS_GET_VBR_CONSTRAINT: c_int = 4021; // out *i32
const OPUS_SET_INBAND_FEC: c_int = 4012; // in i32
const OPUS_GET_INBAND_FEC: c_int = 4013; // out *i32
const OPUS_SET_PACKET_LOSS_PERC: c_int = 4014; // in i32
const OPUS_GET_PACKET_LOSS_PERC: c_int = 4015; // out *i32
const OPUS_GET_LOOKAHEAD: c_int = 4027; // out *i32
// Decoder CTLs
const OPUS_SET_GAIN: c_int = 4034; // in i32
const OPUS_GET_GAIN: c_int = 4045; // out *i32
const OPUS_GET_LAST_PACKET_DURATION: c_int = 4039; // out *i32
const OPUS_GET_PITCH: c_int = 4033; // out *i32
// Bitrate
const OPUS_AUTO: c_int = -1000;
const OPUS_BITRATE_MAX: c_int = -1;
/// The possible applications for the codec.
#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
pub enum Application {
/// Best for most VoIP/videoconference applications where listening quality
/// and intelligibility matter most.
Voip = 2048,
/// Best for broadcast/high-fidelity application where the decoded audio
/// should be as close as possible to the input.
Audio = 2049,
/// Only use when lowest-achievable latency is what matters most.
LowDelay = 2051,
}
/// The available channel setings.
#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
pub enum Channels {
/// One channel.
Mono = 1,
/// Two channels, left and right.
Stereo = 2,
}
/// The available bandwidth level settings.
#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
pub enum Bandwidth {
/// Auto/default setting.
Auto = -1000,
/// 4kHz bandpass.
Narrowband = 1101,
/// 6kHz bandpass.
Mediumband = 1102,
/// 8kHz bandpass.
Wideband = 1103,
/// 12kHz bandpass.
Superwideband = 1104,
/// 20kHz bandpass.
Fullband = 1105,
}
impl Bandwidth {
fn from_int(value: i32) -> Option<Bandwidth> {
Some(match value {
-1000 => Bandwidth::Auto,
1101 => Bandwidth::Narrowband,
1102 => Bandwidth::Mediumband,
1103 => Bandwidth::Wideband,
1104 => Bandwidth::Superwideband,
1105 => Bandwidth::Fullband,
_ => return None,
})
}
fn decode(value: i32, what: &'static str) -> Result<Bandwidth> {
match Bandwidth::from_int(value) {
Some(bandwidth) => Ok(bandwidth),
None => Err(Error::bad_arg(what)),
}
}
}
/// Possible error codes.
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
pub enum ErrorCode {
/// One or more invalid/out of range arguments.
BadArg = -1,
/// Not enough bytes allocated in the buffer.
BufferTooSmall = -2,
/// An internal error was detected.
InternalError = -3,
/// The compressed data passed is corrupted.
InvalidPacket = -4,
/// Invalid/unsupported request number.
Unimplemented = -5,
/// An encoder or decoder structure is invalid or already freed.
InvalidState = -6,
/// Memory allocation has failed.
AllocFail = -7,
/// An unknown failure.
Unknown = -8,
}
impl ErrorCode {
fn from_int(value: c_int) -> ErrorCode {
use ErrorCode::*;
match value {
ffi::OPUS_BAD_ARG => BadArg,
ffi::OPUS_BUFFER_TOO_SMALL => BufferTooSmall,
ffi::OPUS_INTERNAL_ERROR => InternalError,
ffi::OPUS_INVALID_PACKET => InvalidPacket,
ffi::OPUS_UNIMPLEMENTED => Unimplemented,
ffi::OPUS_INVALID_STATE => InvalidState,
ffi::OPUS_ALLOC_FAIL => AllocFail,
_ => Unknown,
}
}
/// Get a human-readable error string for this error code.
pub fn description(self) -> &'static str {
// should always be ASCII and non-null for any input
unsafe { CStr::from_ptr(ffi::opus_strerror(self as c_int)) }.to_str().unwrap()
}
}
/// Possible bitrates.
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
pub enum Bitrate {
/// Explicit bitrate choice (in bits/second).
Bits(i32),
/// Maximum bitrate allowed (up to maximum number of bytes for the packet).
Max,
/// Default bitrate decided by the encoder (not recommended).
Auto,
}
/// Get the libopus version string.
///
/// Applications may look for the substring "-fixed" in the version string to
/// determine whether they have a fixed-point or floating-point build at
/// runtime.
pub fn version() -> &'static str {
// verison string should always be ASCII
unsafe { CStr::from_ptr(ffi::opus_get_version_string()) }.to_str().unwrap()
}
macro_rules! ffi {
($f:ident $(, $rest:expr)*) => {
match unsafe { ffi::$f($($rest),*) } {
code if code < 0 => return Err(Error::from_code(stringify!($f), code)),
code => code,
}
}
}
macro_rules! ctl {
($f:ident, $this:ident, $ctl:ident, $($rest:expr),*) => {
match unsafe { ffi::$f($this.ptr, $ctl, $($rest),*) } {
code if code < 0 => return Err(Error::from_code(
concat!(stringify!($f), "(", stringify!($ctl), ")"),
code,
)),
_ => (),
}
}
}
// ============================================================================
// Encoder
macro_rules! enc_ctl {
($this:ident, $ctl:ident $(, $rest:expr)*) => {
ctl!(opus_encoder_ctl, $this, $ctl, $($rest),*)
}
}
/// An Opus encoder with associated state.
#[derive(Debug)]
pub struct Encoder {
ptr: *mut ffi::OpusEncoder,
channels: Channels,
}
impl Encoder {
/// Create and initialize an encoder.
pub fn new(sample_rate: u32, channels: Channels, mode: Application) -> Result<Encoder> {
let mut error = 0;
let ptr = unsafe { ffi::opus_encoder_create(
sample_rate as i32,
channels as c_int,
mode as c_int,
&mut error) };
if error != ffi::OPUS_OK || ptr.is_null() {
Err(Error::from_code("opus_encoder_create", error))
} else {
Ok(Encoder { ptr: ptr, channels: channels })
}
}
/// Encode an Opus frame.
pub fn encode(&mut self, input: &[i16], output: &mut [u8]) -> Result<usize> {
let len = ffi!(opus_encode, self.ptr,
input.as_ptr(), len(input) / self.channels as c_int,
output.as_mut_ptr(), len(output));
Ok(len as usize)
}
/// Encode an Opus frame from floating point input.
pub fn encode_float(&mut self, input: &[f32], output: &mut [u8]) -> Result<usize> {
let len = ffi!(opus_encode_float, self.ptr,
input.as_ptr(), len(input) / self.channels as c_int,
output.as_mut_ptr(), len(output));
Ok(len as usize)
}
/// Encode an Opus frame to a new buffer.
pub fn encode_vec(&mut self, input: &[i16], max_size: usize) -> Result<Vec<u8>> {
let mut output: Vec<u8> = vec![0; max_size];
let result = self.encode(input, output.as_mut_slice())?;
output.truncate(result);
Ok(output)
}
/// Encode an Opus frame from floating point input to a new buffer.
pub fn encode_vec_float(&mut self, input: &[f32], max_size: usize) -> Result<Vec<u8>> {
let mut output: Vec<u8> = vec![0; max_size];
let result = self.encode_float(input, output.as_mut_slice())?;
output.truncate(result);
Ok(output)
}
// ------------
// Generic CTLs
/// Reset the codec state to be equivalent to a freshly initialized state.
pub fn reset_state(&mut self) -> Result<()> {
enc_ctl!(self, OPUS_RESET_STATE);
Ok(())
}
/// Get the final range of the codec's entropy coder.
pub fn get_final_range(&mut self) -> Result<u32> {
let mut value: u32 = 0;
enc_ctl!(self, OPUS_GET_FINAL_RANGE, &mut value);
Ok(value)
}
/// Get the encoder's configured bandpass.
pub fn get_bandwidth(&mut self) -> Result<Bandwidth> {
let mut value: i32 = 0;
enc_ctl!(self, OPUS_GET_BANDWIDTH, &mut value);
Bandwidth::decode(value, "opus_encoder_ctl(OPUS_GET_BANDWIDTH)")
}
/// Get the samping rate the encoder was intialized with.
pub fn get_sample_rate(&mut self) -> Result<u32> {
let mut value: i32 = 0;
enc_ctl!(self, OPUS_GET_SAMPLE_RATE, &mut value);
Ok(value as u32)
}
// ------------
// Encoder CTLs
/// Set the encoder's bitrate.
pub fn set_bitrate(&mut self, value: Bitrate) -> Result<()> {
let value: i32 = match value {
Bitrate::Auto => OPUS_AUTO,
Bitrate::Max => OPUS_BITRATE_MAX,
Bitrate::Bits(b) => b,
};
enc_ctl!(self, OPUS_SET_BITRATE, value);
Ok(())
}
/// Get the encoder's bitrate.
pub fn get_bitrate(&mut self) -> Result<Bitrate> {
let mut value: i32 = 0;
enc_ctl!(self, OPUS_GET_BITRATE, &mut value);
Ok(match value {
OPUS_AUTO => Bitrate::Auto,
OPUS_BITRATE_MAX => Bitrate::Max,
_ => Bitrate::Bits(value),
})
}
/// Enable or disable variable bitrate.
pub fn set_vbr(&mut self, vbr: bool) -> Result<()> {
let value: i32 = if vbr { 1 } else { 0 };
enc_ctl!(self, OPUS_SET_VBR, value);
Ok(())
}
/// Determine if variable bitrate is enabled.
pub fn get_vbr(&mut self) -> Result<bool> {
let mut value: i32 = 0;
enc_ctl!(self, OPUS_GET_VBR, &mut value);
Ok(value != 0)
}
/// Enable or disable constrained VBR.
pub fn set_vbr_constraint(&mut self, vbr: bool) -> Result<()> {
let value: i32 = if vbr { 1 } else { 0 };
enc_ctl!(self, OPUS_SET_VBR_CONSTRAINT, value);
Ok(())
}
/// Determine if constrained VBR is enabled.
pub fn get_vbr_constraint(&mut self) -> Result<bool> {
let mut value: i32 = 0;
enc_ctl!(self, OPUS_GET_VBR_CONSTRAINT, &mut value);
Ok(value != 0)
}
/// Configures the encoder's use of inband forward error correction (FEC).
pub fn set_inband_fec(&mut self, value: bool) -> Result<()> {
let value: i32 = if value { 1 } else { 0 };
enc_ctl!(self, OPUS_SET_INBAND_FEC, value);
Ok(())
}
/// Gets encoder's configured use of inband forward error correction.
pub fn get_inband_fec(&mut self) -> Result<bool> {
let mut value: i32 = 0;
enc_ctl!(self, OPUS_GET_INBAND_FEC, &mut value);
Ok(value != 0)
}
/// Sets the encoder's expected packet loss percentage.
pub fn set_packet_loss_perc(&mut self, value: i32) -> Result<()> {
enc_ctl!(self, OPUS_SET_PACKET_LOSS_PERC, value);
Ok(())
}
/// Gets the encoder's expected packet loss percentage.
pub fn get_packet_loss_perc(&mut self) -> Result<i32> {
let mut value: i32 = 0;
enc_ctl!(self, OPUS_GET_PACKET_LOSS_PERC, &mut value);
Ok(value)
}
/// Gets the total samples of delay added by the entire codec.
pub fn get_lookahead(&mut self) -> Result<i32> {
let mut value: i32 = 0;
enc_ctl!(self, OPUS_GET_LOOKAHEAD, &mut value);
Ok(value)
}
// TODO: Encoder-specific CTLs
}
impl Drop for Encoder {
fn drop(&mut self) {
unsafe { ffi::opus_encoder_destroy(self.ptr) }
}
}
// "A single codec state may only be accessed from a single thread at
// a time and any required locking must be performed by the caller. Separate
// streams must be decoded with separate decoder states and can be decoded
// in parallel unless the library was compiled with NONTHREADSAFE_PSEUDOSTACK
// defined."
//
// In other words, opus states may be moved between threads at will. A special
// compilation mode intended for embedded platforms forbids multithreaded use
// of the library as a whole rather than on a per-state basis, but the opus-sys
// crate does not use this mode.
unsafe impl Send for Encoder {}
// ============================================================================
// Decoder
macro_rules! dec_ctl {
($this:ident, $ctl:ident $(, $rest:expr)*) => {
ctl!(opus_decoder_ctl, $this, $ctl, $($rest),*)
}
}
/// An Opus decoder with associated state.
#[derive(Debug)]
pub struct Decoder {
ptr: *mut ffi::OpusDecoder,
channels: Channels,
}
impl Decoder {
/// Create and initialize a decoder.
pub fn new(sample_rate: u32, channels: Channels) -> Result<Decoder> {
let mut error = 0;
let ptr = unsafe { ffi::opus_decoder_create(
sample_rate as i32,
channels as c_int,
&mut error) };
if error != ffi::OPUS_OK || ptr.is_null() {
Err(Error::from_code("opus_decoder_create", error))
} else {
Ok(Decoder { ptr: ptr, channels: channels })
}
}
/// Decode an Opus packet.
pub fn decode(&mut self, input: &[u8], output: &mut [i16], fec: bool) -> Result<usize> {
let ptr = match input.len() {
0 => std::ptr::null(),
_ => input.as_ptr(),
};
let len = ffi!(opus_decode, self.ptr,
ptr, len(input),
output.as_mut_ptr(), len(output) / self.channels as c_int,
fec as c_int);
Ok(len as usize)
}
/// Decode an Opus packet with floating point output.
pub fn decode_float(&mut self, input: &[u8], output: &mut [f32], fec: bool) -> Result<usize> {
let ptr = match input.len() {
0 => std::ptr::null(),
_ => input.as_ptr(),
};
let len = ffi!(opus_decode_float, self.ptr,
ptr, len(input),
output.as_mut_ptr(), len(output) / self.channels as c_int,
fec as c_int);
Ok(len as usize)
}
/// Get the number of samples of an Opus packet.
pub fn get_nb_samples(&self, packet: &[u8]) -> Result<usize> {
let len = ffi!(opus_decoder_get_nb_samples, self.ptr,
packet.as_ptr(), packet.len() as i32);
Ok(len as usize)
}
// ------------
// Generic CTLs
/// Reset the codec state to be equivalent to a freshly initialized state.
pub fn reset_state(&mut self) -> Result<()> {
dec_ctl!(self, OPUS_RESET_STATE);
Ok(())
}
/// Get the final range of the codec's entropy coder.
pub fn get_final_range(&mut self) -> Result<u32> {
let mut value: u32 = 0;
dec_ctl!(self, OPUS_GET_FINAL_RANGE, &mut value);
Ok(value)
}
/// Get the decoder's last bandpass.
pub fn get_bandwidth(&mut self) -> Result<Bandwidth> {
let mut value: i32 = 0;
dec_ctl!(self, OPUS_GET_BANDWIDTH, &mut value);
Bandwidth::decode(value, "opus_decoder_ctl(OPUS_GET_BANDWIDTH)")
}
/// Get the samping rate the decoder was intialized with.
pub fn get_sample_rate(&mut self) -> Result<u32> {
let mut value: i32 = 0;
dec_ctl!(self, OPUS_GET_SAMPLE_RATE, &mut value);
Ok(value as u32)
}
// ------------
// Decoder CTLs
/// Configures decoder gain adjustment.
///
/// Scales the decoded output by a factor specified in Q8 dB units. This has
/// a maximum range of -32768 to 32768 inclusive, and returns `BadArg`
/// otherwise. The default is zero indicating no adjustment. This setting
/// survives decoder reset.
///
/// `gain = pow(10, x / (20.0 * 256))`
pub fn set_gain(&mut self, gain: i32) -> Result<()> {
dec_ctl!(self, OPUS_SET_GAIN, gain);
Ok(())
}
/// Gets the decoder's configured gain adjustment.
pub fn get_gain(&mut self) -> Result<i32> {
let mut value: i32 = 0;
dec_ctl!(self, OPUS_GET_GAIN, &mut value);
Ok(value)
}
/// Gets the duration (in samples) of the last packet successfully decoded
/// or concealed.
pub fn get_last_packet_duration(&mut self) -> Result<u32> {
let mut value: i32 = 0;
dec_ctl!(self, OPUS_GET_LAST_PACKET_DURATION, &mut value);
Ok(value as u32)
}
/// Gets the pitch of the last decoded frame, if available.
///
/// This can be used for any post-processing algorithm requiring the use of
/// pitch, e.g. time stretching/shortening. If the last frame was not
/// voiced, or if the pitch was not coded in the frame, then zero is
/// returned.
pub fn get_pitch(&mut self) -> Result<i32> {
let mut value: i32 = 0;
dec_ctl!(self, OPUS_GET_PITCH, &mut value);
Ok(value)
}
}
impl Drop for Decoder {
fn drop(&mut self) {
unsafe { ffi::opus_decoder_destroy(self.ptr) }
}
}
// See `unsafe impl Send for Encoder`.
unsafe impl Send for Decoder {}
// ============================================================================
// Packet Analysis
/// Analyze raw Opus packets.
pub mod packet {
use super::*;
use super::ffi;
use std::{ptr, slice};
/// Get the bandwidth of an Opus packet.
pub fn get_bandwidth(packet: &[u8]) -> Result<Bandwidth> {
if packet.len() < 1 {
return Err(Error::bad_arg("opus_packet_get_bandwidth"));
}
let bandwidth = ffi!(opus_packet_get_bandwidth, packet.as_ptr());
Bandwidth::decode(bandwidth, "opus_packet_get_bandwidth")
}
/// Get the number of channels from an Opus packet.
pub fn get_nb_channels(packet: &[u8]) -> Result<Channels> {
if packet.len() < 1 {
return Err(Error::bad_arg("opus_packet_get_nb_channels"));
}
let channels = ffi!(opus_packet_get_nb_channels, packet.as_ptr());
match channels {
1 => Ok(Channels::Mono),
2 => Ok(Channels::Stereo),
_ => Err(Error::bad_arg("opus_packet_get_nb_channels")),
}
}
/// Get the number of frames in an Opus packet.
pub fn get_nb_frames(packet: &[u8]) -> Result<usize> {
let frames = ffi!(opus_packet_get_nb_frames, packet.as_ptr(), len(packet));
Ok(frames as usize)
}
/// Get the number of samples of an Opus packet.
pub fn get_nb_samples(packet: &[u8], sample_rate: u32) -> Result<usize> {
let frames = ffi!(opus_packet_get_nb_samples,
packet.as_ptr(), len(packet),
sample_rate as c_int);
Ok(frames as usize)
}
/// Get the number of samples per frame from an Opus packet.
pub fn get_samples_per_frame(packet: &[u8], sample_rate: u32) -> Result<usize> {
if packet.len() < 1 {
return Err(Error::bad_arg("opus_packet_get_samples_per_frame"))
}
let samples = ffi!(opus_packet_get_samples_per_frame,
packet.as_ptr(), sample_rate as c_int);
Ok(samples as usize)
}
/// Parse an Opus packet into one or more frames.
pub fn parse(packet: &[u8]) -> Result<Packet> {
let mut toc: u8 = 0;
let mut frames = [ptr::null(); 48];
let mut sizes = [0i16; 48];
let mut payload_offset: i32 = 0;
let num_frames = ffi!(opus_packet_parse,
packet.as_ptr(), len(packet),
&mut toc, frames.as_mut_ptr(),
sizes.as_mut_ptr(), &mut payload_offset);
let mut frames_vec = Vec::with_capacity(num_frames as usize);
for i in 0..num_frames as usize {
frames_vec.push(unsafe { slice::from_raw_parts(frames[i], sizes[i] as usize) });
}
Ok(Packet {
toc: toc,
frames: frames_vec,
payload_offset: payload_offset as usize,
})
}
/// A parsed Opus packet, retuned from `parse`.
#[derive(Debug)]
pub struct Packet<'a> {
/// The TOC byte of the packet.
pub toc: u8,
/// The frames contained in the packet.
pub frames: Vec<&'a [u8]>,
/// The offset into the packet at which the payload is located.
pub payload_offset: usize,
}
/// Pad a given Opus packet to a larger size.
///
/// The packet will be extended from the first `prev_len` bytes of the
/// buffer into the rest of the available space.
pub fn pad(packet: &mut [u8], prev_len: usize) -> Result<usize> {
let result = ffi!(opus_packet_pad, packet.as_mut_ptr(),
check_len(prev_len), len(packet));
Ok(result as usize)
}
/// Remove all padding from a given Opus packet and rewrite the TOC sequence
/// to minimize space usage.
pub fn unpad(packet: &mut [u8]) -> Result<usize> {
let result = ffi!(opus_packet_unpad, packet.as_mut_ptr(), len(packet));
Ok(result as usize)
}
}
// ============================================================================
// Float Soft Clipping
/// Soft-clipping to bring a float signal within the [-1,1] range.
#[derive(Debug)]
pub struct SoftClip {
channels: Channels,
memory: [f32; 2],
}
impl SoftClip {
/// Initialize a new soft-clipping state.
pub fn new(channels: Channels) -> SoftClip {
SoftClip { channels: channels, memory: [0.0; 2] }
}
/// Apply soft-clipping to a float signal.
pub fn apply(&mut self, signal: &mut [f32]) {
unsafe { ffi::opus_pcm_soft_clip(
signal.as_mut_ptr(),
len(signal) / self.channels as c_int,
self.channels as c_int,
self.memory.as_mut_ptr()) };
}
}
// ============================================================================
// Repacketizer
/// A repacketizer used to merge together or split apart multiple Opus packets.
#[derive(Debug)]
pub struct Repacketizer {
ptr: *mut ffi::OpusRepacketizer,
}
impl Repacketizer {
/// Create and initialize a repacketizer.
pub fn new() -> Result<Repacketizer> {
let ptr = unsafe { ffi::opus_repacketizer_create() };
if ptr.is_null() {
Err(Error::from_code("opus_repacketizer_create", ffi::OPUS_ALLOC_FAIL))
} else {
Ok(Repacketizer { ptr: ptr })
}
}
/// Shortcut to combine several smaller packets into one larger one.
pub fn combine(&mut self, input: &[&[u8]], output: &mut [u8]) -> Result<usize> {
let mut state = self.begin();
for &packet in input {
state.cat(packet)?;
}
state.out(output)
}
/// Begin using the repacketizer.
pub fn begin<'rp, 'buf>(&'rp mut self) -> RepacketizerState<'rp, 'buf> {
unsafe { ffi::opus_repacketizer_init(self.ptr); }
RepacketizerState { rp: self, phantom: PhantomData }
}
}
impl Drop for Repacketizer {
fn drop(&mut self) {
unsafe { ffi::opus_repacketizer_destroy(self.ptr) }
}
}
// See `unsafe impl Send for Encoder`.
unsafe impl Send for Repacketizer {}
// To understand why these lifetime bounds are needed, imagine that the
// repacketizer keeps an internal Vec<&'buf [u8]>, which is added to by cat()
// and accessed by get_nb_frames(), out(), and out_range(). To prove that these
// lifetime bounds are correct, a dummy implementation with the same signatures
// but a real Vec<&'buf [u8]> rather than unsafe blocks may be substituted.
/// An in-progress repacketization.
#[derive(Debug)]
pub struct RepacketizerState<'rp, 'buf> {
rp: &'rp mut Repacketizer,
phantom: PhantomData<&'buf [u8]>,
}
impl<'rp, 'buf> RepacketizerState<'rp, 'buf> {
/// Add a packet to the current repacketizer state.
pub fn cat(&mut self, packet: &'buf [u8]) -> Result<()> {
ffi!(opus_repacketizer_cat, self.rp.ptr,
packet.as_ptr(), len(packet));
Ok(())
}
/// Add a packet to the current repacketizer state, moving it.
#[inline]
pub fn cat_move<'b2>(self, packet: &'b2 [u8]) -> Result<RepacketizerState<'rp, 'b2>> where 'buf: 'b2 {
let mut shorter = self;
shorter.cat(packet)?;
Ok(shorter)
}
/// Get the total number of frames contained in packet data submitted so
/// far via `cat`.
pub fn get_nb_frames(&mut self) -> usize {
unsafe { ffi::opus_repacketizer_get_nb_frames(self.rp.ptr) as usize }
}
/// Construct a new packet from data previously submitted via `cat`.
///
/// All previously submitted frames are used.
pub fn out(&mut self, buffer: &mut [u8]) -> Result<usize> {
let result = ffi!(opus_repacketizer_out, self.rp.ptr,
buffer.as_mut_ptr(), len(buffer));
Ok(result as usize)
}
/// Construct a new packet from data previously submitted via `cat`, with
/// a manually specified subrange.
///
/// The `end` index should not exceed the value of `get_nb_frames()`.
pub fn out_range(&mut self, begin: usize, end: usize, buffer: &mut [u8]) -> Result<usize> {
let result = ffi!(opus_repacketizer_out_range, self.rp.ptr,
check_len(begin), check_len(end),
buffer.as_mut_ptr(), len(buffer));
Ok(result as usize)
}
}
// ============================================================================
// TODO: Multistream API
// ============================================================================
// Error Handling
/// Opus error Result alias.
pub type Result<T> = std::result::Result<T, Error>;
/// An error generated by the Opus library.
#[derive(Debug)]
pub struct Error {
function: &'static str,
code: ErrorCode,
}
impl Error {
fn bad_arg(what: &'static str) -> Error {
Error { function: what, code: ErrorCode::BadArg }
}
fn from_code(what: &'static str, code: c_int) -> Error {
Error { function: what, code: ErrorCode::from_int(code) }
}
/// Get the name of the Opus function from which the error originated.
#[inline]
pub fn function(&self) -> &'static str { self.function }
/// Get a textual description of the error provided by Opus.
#[inline]
pub fn description(&self) -> &'static str { self.code.description() }
/// Get the Opus error code of the error.
#[inline]
pub fn code(&self) -> ErrorCode { self.code }
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(f, "{}: {}", self.function, self.description())
}
}
impl std::error::Error for Error {
fn description(&self) -> &str {
self.code.description()
}
}
fn check_len(val: usize) -> c_int {
let len = val as c_int;
if len as usize != val {
panic!("length out of range: {}", val);
}
len
}
#[inline]
fn len<T>(slice: &[T]) -> c_int {
check_len(slice.len())
}

6
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@@ -0,0 +1,6 @@
#![allow(non_upper_case_globals)]
#![allow(non_camel_case_types)]
#![allow(non_snake_case)]
#![allow(dead_code)]
include!(concat!(env!("OUT_DIR"), "/opus_ffi.rs"));

10
libs/magnum-opus/tests/compile-fail/repacketize.rs Normal file
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@@ -0,0 +1,10 @@
extern crate opus;
fn main() {
let mut rp = opus::Repacketizer::new().unwrap();
let mut wip = rp.begin().cat_move(
&[1, 2, 3]
//~^ ERROR borrowed value does not live long enough
).unwrap();
wip.out(&mut []);
}

13
libs/magnum-opus/tests/fec.rs Normal file
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@@ -0,0 +1,13 @@
//! Test that supplying empty packets does forward error correction.
extern crate magnum_opus;
use magnum_opus::*;
#[test]
fn blah() {
let mut magnum_opus = Decoder::new(48000, Channels::Mono).unwrap();
let mut output = vec![0i16; 5760];
let size = magnum_opus.decode(&[], &mut output[..], true).unwrap();
assert_eq!(size, 5760);
}

29
libs/magnum-opus/tests/opus-padding.rs Normal file
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@@ -0,0 +1,29 @@
// Based on libmagnum_opus/tests/test_magnum_opus_padding.c
/* Check for overflow in reading the padding length.
* http://lists.xiph.org/pipermail/magnum_opus/2012-November/001834.html
*/
extern crate magnum_opus;
#[test]
fn test_overflow() {
const PACKETSIZE: usize = 16909318;
const CHANNELS: magnum_opus::Channels = magnum_opus::Channels::Stereo;
const FRAMESIZE: usize = 5760;
let mut input = vec![0xff; PACKETSIZE];
let mut output = vec![0i16; FRAMESIZE * 2];
input[0] = 0xff;
input[1] = 0x41;
*input.last_mut().unwrap() = 0x0b;
let mut decoder = magnum_opus::Decoder::new(48000, CHANNELS).unwrap();
let result = decoder.decode(&input[..], &mut output[..], false);
drop(decoder);
drop(input);
drop(output);
assert_eq!(result.unwrap_err().code(), magnum_opus::ErrorCode::InvalidPacket);
}

127
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@@ -0,0 +1,127 @@
extern crate magnum_opus;
fn check_ascii(s: &str) -> &str {
for &b in s.as_bytes() {
assert!(b < 0x80, "Non-ASCII character in string");
assert!(b > 0x00, "NUL in string")
}
std::str::from_utf8(s.as_bytes()).unwrap()
}
#[test]
fn strings_ascii() {
use magnum_opus::ErrorCode::*;
println!("\nVersion: {}", check_ascii(magnum_opus::version()));
let codes = [BadArg, BufferTooSmall, InternalError, InvalidPacket,
Unimplemented, InvalidState, AllocFail, Unknown];
for &code in codes.iter() {
println!("{:?}: {}", code, check_ascii(code.description()));
}
}
// 48000Hz * 1 channel * 20 ms / 1000
const MONO_20MS: usize = 48000 * 1 * 20 / 1000;
#[test]
fn encode_mono() {
let mut encoder = magnum_opus::Encoder::new(48000, magnum_opus::Channels::Mono, magnum_opus::Application::Audio).unwrap();
let mut output = [0; 256];
let len = encoder.encode(&[0_i16; MONO_20MS], &mut output).unwrap();
assert_eq!(&output[..len], &[248, 255, 254]);
let len = encoder.encode(&[0_i16; MONO_20MS], &mut output).unwrap();
assert_eq!(&output[..len], &[248, 255, 254]);
let len = encoder.encode(&[1_i16; MONO_20MS], &mut output).unwrap();
assert!(len > 190 && len < 220);
let len = encoder.encode(&[0_i16; MONO_20MS], &mut output).unwrap();
assert!(len > 170 && len < 190);
let myvec = encoder.encode_vec(&[1_i16; MONO_20MS], output.len()).unwrap();
assert!(myvec.len() > 120 && myvec.len() < 140);
}
#[test]
fn encode_stereo() {
let mut encoder = magnum_opus::Encoder::new(48000, magnum_opus::Channels::Stereo, magnum_opus::Application::Audio).unwrap();
let mut output = [0; 512];
let len = encoder.encode(&[0_i16; 2 * MONO_20MS], &mut output).unwrap();
assert_eq!(&output[..len], &[252, 255, 254]);
let len = encoder.encode(&[0_i16; 4 * MONO_20MS], &mut output).unwrap();
assert_eq!(&output[..len], &[253, 255, 254, 255, 254]);
let len = encoder.encode(&[17_i16; 2 * MONO_20MS], &mut output).unwrap();
assert!(len > 240);
let len = encoder.encode(&[0_i16; 2 * MONO_20MS], &mut output).unwrap();
assert!(len > 240);
// Very small buffer should still succeed
let len = encoder.encode(&[95_i16; 2 * MONO_20MS], &mut [0; 20]).unwrap();
assert!(len <= 20);
let myvec = encoder.encode_vec(&[95_i16; 2 * MONO_20MS], 20).unwrap();
assert!(myvec.len() <= 20);
}
#[test]
fn encode_bad_rate() {
match magnum_opus::Encoder::new(48001, magnum_opus::Channels::Mono, magnum_opus::Application::Audio) {
Ok(_) => panic!("Encoder::new did not return BadArg"),
Err(err) => assert_eq!(err.code(), magnum_opus::ErrorCode::BadArg),
}
}
#[test]
fn encode_bad_buffer() {
let mut encoder = magnum_opus::Encoder::new(48000, magnum_opus::Channels::Stereo, magnum_opus::Application::Audio).unwrap();
match encoder.encode(&[1_i16; 2 * MONO_20MS], &mut [0; 0]) {
Ok(_) => panic!("encode with 0-length buffer did not return BadArg"),
Err(err) => assert_eq!(err.code(), magnum_opus::ErrorCode::BadArg),
}
}
#[test]
fn repacketizer() {
let mut rp = magnum_opus::Repacketizer::new().unwrap();
let mut out = [0; 256];
for _ in 0..2 {
let packet1 = [249, 255, 254, 255, 254];
let packet2 = [248, 255, 254];
let mut state = rp.begin();
state.cat(&packet1).unwrap();
state.cat(&packet2).unwrap();
let len = state.out(&mut out).unwrap();
assert_eq!(&out[..len], &[251, 3, 255, 254, 255, 254, 255, 254]);
}
for _ in 0..2 {
let packet = [248, 255, 254];
let state = rp.begin().cat_move(&packet).unwrap();
let packet = [249, 255, 254, 255, 254];
let state = state.cat_move(&packet).unwrap();
let len = {state}.out(&mut out).unwrap();
assert_eq!(&out[..len], &[251, 3, 255, 254, 255, 254, 255, 254]);
}
for _ in 0..2 {
let len = rp.combine(&[
&[249, 255, 254, 255, 254],
&[248, 255, 254],
], &mut out).unwrap();
assert_eq!(&out[..len], &[251, 3, 255, 254, 255, 254, 255, 254]);
}
for _ in 0..2 {
let len = rp.begin()
.cat_move(&[248, 255, 254]).unwrap()
.cat_move(&[248, 71, 71]).unwrap()
.out(&mut out).unwrap();
assert_eq!(&out[..len], &[249, 255, 254, 71, 71]);
}
}