forked from mirrors/gstreamer-rs
344 lines
9.1 KiB
Rust
344 lines
9.1 KiB
Rust
// Copyright (C) 2017 Sebastian Dröge <sebastian@centricular.com>
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use ffi;
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use glib_ffi;
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use gobject_ffi;
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use std::ffi::CStr;
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use std::fmt;
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use std::str;
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use glib;
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use glib::translate::{from_glib, FromGlib, FromGlibPtrNone, ToGlib, ToGlibPtr, ToGlibPtrMut};
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#[derive(PartialEq, Eq, Debug)]
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pub enum AudioEndianness {
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Unknown,
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LittleEndian = 1234,
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BigEndian = 4321,
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}
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impl FromGlib<i32> for AudioEndianness {
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fn from_glib(value: i32) -> Self {
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assert_initialized_main_thread!();
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match value {
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1234 => AudioEndianness::LittleEndian,
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4321 => AudioEndianness::BigEndian,
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_ => AudioEndianness::Unknown,
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}
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}
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}
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impl ToGlib for AudioEndianness {
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type GlibType = i32;
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fn to_glib(&self) -> i32 {
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match *self {
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AudioEndianness::LittleEndian => 1234,
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AudioEndianness::BigEndian => 4321,
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_ => 0,
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}
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}
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}
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pub struct AudioFormatInfo(&'static ffi::GstAudioFormatInfo);
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impl AudioFormatInfo {
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pub fn from_format(format: ::AudioFormat) -> AudioFormatInfo {
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assert_initialized_main_thread!();
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unsafe {
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let info = ffi::gst_audio_format_get_info(format.to_glib());
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assert!(!info.is_null());
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AudioFormatInfo(&*info)
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}
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}
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pub fn format(&self) -> ::AudioFormat {
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from_glib(self.0.format)
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}
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pub fn name<'a>(&self) -> &'a str {
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unsafe { CStr::from_ptr(self.0.name).to_str().unwrap() }
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}
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pub fn description<'a>(&self) -> &'a str {
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unsafe { CStr::from_ptr(self.0.description).to_str().unwrap() }
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}
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pub fn flags(&self) -> ::AudioFormatFlags {
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from_glib(self.0.flags)
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}
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pub fn endianness(&self) -> AudioEndianness {
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from_glib(self.0.endianness)
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}
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pub fn width(&self) -> u32 {
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self.0.width as u32
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}
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pub fn depth(&self) -> u32 {
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self.0.depth as u32
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}
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pub fn unpack_format(&self) -> ::AudioFormat {
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from_glib(self.0.unpack_format)
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}
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pub fn silence<'a>(&self) -> &'a [u8] {
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&self.0.silence
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}
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pub fn unpack(&self, flags: ::AudioPackFlags, dest: &mut [u8], src: &[u8]) {
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let unpack_format = Self::from_format(self.unpack_format());
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let unpack_width = unpack_format.width() as usize;
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if unpack_width == 0 || self.0.unpack_func.is_none() {
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panic!("No unpack format for {:?}", self);
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}
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let self_width = self.width() as usize;
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if self_width == 0 {
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panic!("No width for {:?}", self);
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}
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if src.len() % (self_width / 8) != 0 {
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panic!("Incomplete number of samples in src");
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}
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let nsamples = src.len() / (self_width / 8);
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if dest.len() != nsamples * (unpack_width / 8) {
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panic!("Invalid dest length");
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}
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unsafe {
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(self.0.unpack_func.as_ref().unwrap())(
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self.0,
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flags.to_glib(),
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dest.as_mut_ptr() as *mut _,
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src.as_ptr() as *mut _,
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nsamples as i32,
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);
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}
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}
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pub fn pack(&self, flags: ::AudioPackFlags, dest: &mut [u8], src: &[u8]) {
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let unpack_format = Self::from_format(self.unpack_format());
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let unpack_width = unpack_format.width() as usize;
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if unpack_width == 0 || self.0.pack_func.is_none() {
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panic!("No unpack format for {:?}", self);
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}
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let self_width = self.width() as usize;
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if self_width == 0 {
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panic!("No width for {:?}", self);
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}
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if src.len() % (unpack_width / 8) != 0 {
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panic!("Incomplete number of samples in src");
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}
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let nsamples = src.len() / (unpack_width / 8);
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if dest.len() != nsamples * (self_width / 8) {
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panic!("Invalid dest length");
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}
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unsafe {
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(self.0.pack_func.as_ref().unwrap())(
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self.0,
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flags.to_glib(),
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src.as_ptr() as *mut _,
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dest.as_mut_ptr() as *mut _,
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nsamples as i32,
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);
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}
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}
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pub fn fill_silence(&self, dest: &mut [u8]) {
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let self_width = self.width() as usize;
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if self_width == 0 {
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panic!("Filling with silence unsupported");
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}
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if dest.len() % (self_width / 8) != 0 {
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panic!("Incomplete number of samples in dest");
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}
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unsafe {
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ffi::gst_audio_format_fill_silence(self.0, dest.as_mut_ptr() as *mut _, dest.len())
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}
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}
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pub fn is_float(&self) -> bool {
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self.flags().contains(::AudioFormatFlags::FLOAT)
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}
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pub fn is_integer(&self) -> bool {
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self.flags().contains(::AudioFormatFlags::INTEGER)
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}
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pub fn is_signed(&self) -> bool {
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self.flags().contains(::AudioFormatFlags::SIGNED)
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}
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pub fn is_little_endian(&self) -> bool {
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self.endianness() == AudioEndianness::LittleEndian
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}
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pub fn is_big_endian(&self) -> bool {
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self.endianness() == AudioEndianness::BigEndian
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}
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}
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unsafe impl Sync for AudioFormatInfo {}
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unsafe impl Send for AudioFormatInfo {}
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impl PartialEq for AudioFormatInfo {
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fn eq(&self, other: &Self) -> bool {
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self.format() == other.format()
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}
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}
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impl Eq for AudioFormatInfo {}
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impl fmt::Debug for AudioFormatInfo {
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fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
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f.write_str(self.name())
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}
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}
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impl fmt::Display for AudioFormatInfo {
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fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
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f.write_str(self.name())
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}
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}
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impl str::FromStr for ::AudioFormatInfo {
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type Err = ();
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fn from_str(s: &str) -> Result<Self, ()> {
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skip_assert_initialized!();
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let format = s.parse()?;
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Ok(AudioFormatInfo::from_format(format))
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}
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}
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impl From<::AudioFormat> for AudioFormatInfo {
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fn from(f: ::AudioFormat) -> Self {
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skip_assert_initialized!();
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Self::from_format(f)
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}
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}
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impl glib::types::StaticType for AudioFormatInfo {
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fn static_type() -> glib::types::Type {
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unsafe { glib::translate::from_glib(ffi::gst_audio_format_info_get_type()) }
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}
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}
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#[doc(hidden)]
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impl<'a> glib::value::FromValueOptional<'a> for AudioFormatInfo {
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unsafe fn from_value_optional(value: &glib::Value) -> Option<Self> {
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Option::<AudioFormatInfo>::from_glib_none(
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gobject_ffi::g_value_get_boxed(value.to_glib_none().0) as *mut ffi::GstAudioFormatInfo,
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)
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}
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}
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#[doc(hidden)]
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impl glib::value::SetValue for AudioFormatInfo {
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unsafe fn set_value(value: &mut glib::Value, this: &Self) {
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gobject_ffi::g_value_set_boxed(
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value.to_glib_none_mut().0,
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glib::translate::ToGlibPtr::<*const ffi::GstAudioFormatInfo>::to_glib_none(this).0 as
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glib_ffi::gpointer,
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)
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}
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}
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#[doc(hidden)]
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impl glib::value::SetValueOptional for AudioFormatInfo {
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unsafe fn set_value_optional(value: &mut glib::Value, this: Option<&Self>) {
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gobject_ffi::g_value_set_boxed(
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value.to_glib_none_mut().0,
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glib::translate::ToGlibPtr::<*const ffi::GstAudioFormatInfo>::to_glib_none(&this).0 as
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glib_ffi::gpointer,
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)
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}
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}
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#[doc(hidden)]
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impl glib::translate::GlibPtrDefault for AudioFormatInfo {
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type GlibType = *mut ffi::GstAudioFormatInfo;
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}
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#[doc(hidden)]
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impl<'a> glib::translate::ToGlibPtr<'a, *const ffi::GstAudioFormatInfo> for AudioFormatInfo {
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type Storage = &'a AudioFormatInfo;
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fn to_glib_none(&'a self) -> glib::translate::Stash<'a, *const ffi::GstAudioFormatInfo, Self> {
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glib::translate::Stash(self.0, self)
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}
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fn to_glib_full(&self) -> *const ffi::GstAudioFormatInfo {
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unimplemented!()
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}
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}
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#[doc(hidden)]
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impl glib::translate::FromGlibPtrNone<*mut ffi::GstAudioFormatInfo> for AudioFormatInfo {
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#[inline]
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unsafe fn from_glib_none(ptr: *mut ffi::GstAudioFormatInfo) -> Self {
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AudioFormatInfo(&*ptr)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use gst;
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#[test]
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fn test_get() {
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gst::init().unwrap();
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let info = AudioFormatInfo::from_format(::AudioFormat::S16le);
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assert_eq!(info.name(), "S16LE");
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let other_info = "S16LE".parse().unwrap();
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assert_eq!(info, other_info);
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}
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#[test]
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fn pack_unpack() {
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gst::init().unwrap();
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let info = AudioFormatInfo::from_format(::AudioFormat::S16le);
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let unpack_info = AudioFormatInfo::from_format(info.unpack_format());
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assert!(unpack_info.width() > 0);
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let input = [0, 0, 255, 255, 128, 128, 64, 64];
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let mut unpacked = [0; 16];
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let mut output = [0; 8];
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info.unpack(::AudioPackFlags::NONE, &mut unpacked, &input);
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info.pack(::AudioPackFlags::NONE, &mut output, &unpacked);
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assert_eq!(input, output);
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}
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}
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