forked from mirrors/gstreamer-rs
121 lines
2.9 KiB
Rust
121 lines
2.9 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 gst_video_sys;
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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::translate::{from_glib, FromGlib, ToGlib, ToGlibPtr};
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#[derive(PartialEq, Eq, Copy, Clone, Debug, Hash)]
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pub enum VideoEndianness {
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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 VideoEndianness {
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fn from_glib(value: i32) -> Self {
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skip_assert_initialized!();
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match value {
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1234 => VideoEndianness::LittleEndian,
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4321 => VideoEndianness::BigEndian,
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_ => VideoEndianness::Unknown,
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}
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}
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}
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impl ToGlib for VideoEndianness {
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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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VideoEndianness::LittleEndian => 1234,
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VideoEndianness::BigEndian => 4321,
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_ => 0,
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}
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}
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}
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impl ::VideoFormat {
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pub fn from_string(s: &str) -> ::VideoFormat {
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assert_initialized_main_thread!();
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unsafe {
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from_glib(gst_video_sys::gst_video_format_from_string(
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s.to_glib_none().0,
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))
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}
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}
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pub fn from_fourcc(fourcc: u32) -> ::VideoFormat {
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assert_initialized_main_thread!();
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unsafe { from_glib(gst_video_sys::gst_video_format_from_fourcc(fourcc)) }
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}
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pub fn from_masks(
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depth: u32,
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bpp: u32,
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endianness: ::VideoEndianness,
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red_mask: u32,
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blue_mask: u32,
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green_mask: u32,
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alpha_mask: u32,
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) -> ::VideoFormat {
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assert_initialized_main_thread!();
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unsafe {
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from_glib(gst_video_sys::gst_video_format_from_masks(
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depth as i32,
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bpp as i32,
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endianness.to_glib(),
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red_mask,
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blue_mask,
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green_mask,
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alpha_mask,
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))
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}
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}
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pub fn to_string<'a>(self) -> &'a str {
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if self == ::VideoFormat::Unknown {
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return "UNKNOWN";
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}
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unsafe {
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CStr::from_ptr(gst_video_sys::gst_video_format_to_string(self.to_glib()))
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.to_str()
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.unwrap()
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}
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}
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}
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impl str::FromStr for ::VideoFormat {
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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 = Self::from_string(s);
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if format == ::VideoFormat::Unknown {
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Err(())
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} else {
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Ok(format)
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}
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}
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}
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impl fmt::Display for ::VideoFormat {
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fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
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f.write_str(self.to_string().as_str())
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}
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}
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