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gstreamer-rs/gstreamer-video/src/video_format.rs
Sebastian Dröge 0b70e52032 gstreamer/audio/video: Correctly implement ExactSizeIterator 
len() is optional but size_hint() must return the correct values. Also
this shouldn't return the overall length but the remaining length.
2020-10-09 11:35:19 +03:00

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// Copyright (C) 2017 Sebastian Dröge <sebastian@centricular.com>
//
// 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.
use gst_video_sys;
use once_cell::sync::Lazy;
use std::ffi::CStr;
use std::fmt;
use std::str;
use glib::translate::{from_glib, FromGlib, ToGlib, ToGlibPtr};
#[cfg(feature = "v1_18")]
pub static VIDEO_FORMATS_ALL: Lazy<Box<[::VideoFormat]>> = Lazy::new(|| unsafe {
let mut len: u32 = 0;
let mut res = Vec::with_capacity(len as usize);
let formats = gst_video_sys::gst_video_formats_raw(&mut len);
for i in 0..len {
let format = formats.offset(i as isize);
res.push(from_glib(*format));
}
res.into_boxed_slice()
});
#[cfg(not(feature = "v1_18"))]
pub static VIDEO_FORMATS_ALL: Lazy<Box<[::VideoFormat]>> = Lazy::new(|| {
#[cfg(target_endian = "little")]
{
Box::new([
::VideoFormat::Ayuv64,
::VideoFormat::Argb64,
#[cfg(feature = "v1_12")]
::VideoFormat::Gbra12le,
#[cfg(feature = "v1_12")]
::VideoFormat::Gbra12be,
::VideoFormat::A44410le,
#[cfg(feature = "v1_12")]
::VideoFormat::Gbra10le,
::VideoFormat::A44410be,
#[cfg(feature = "v1_12")]
::VideoFormat::Gbra10be,
::VideoFormat::A42210le,
::VideoFormat::A42210be,
::VideoFormat::A42010le,
::VideoFormat::A42010be,
#[cfg(feature = "v1_16")]
::VideoFormat::Bgr10a2Le,
#[cfg(feature = "v1_16")]
::VideoFormat::Y410,
#[cfg(feature = "v1_12")]
::VideoFormat::Gbra,
::VideoFormat::Abgr,
#[cfg(feature = "v1_16")]
::VideoFormat::Vuya,
::VideoFormat::Bgra,
::VideoFormat::Ayuv,
::VideoFormat::Argb,
::VideoFormat::Rgba,
::VideoFormat::A420,
::VideoFormat::V216,
#[cfg(feature = "v1_12")]
::VideoFormat::Y44412le,
#[cfg(feature = "v1_12")]
::VideoFormat::Gbr12le,
#[cfg(feature = "v1_12")]
::VideoFormat::Y44412be,
#[cfg(feature = "v1_12")]
::VideoFormat::Gbr12be,
#[cfg(feature = "v1_12")]
::VideoFormat::I42212le,
#[cfg(feature = "v1_12")]
::VideoFormat::I42212be,
#[cfg(feature = "v1_12")]
::VideoFormat::I42012le,
#[cfg(feature = "v1_12")]
::VideoFormat::I42012be,
::VideoFormat::Y44410le,
::VideoFormat::Gbr10le,
::VideoFormat::Y44410be,
::VideoFormat::Gbr10be,
::VideoFormat::R210,
::VideoFormat::I42210le,
::VideoFormat::I42210be,
#[cfg(feature = "v1_14")]
::VideoFormat::Nv1610le32,
#[cfg(feature = "v1_16")]
::VideoFormat::Y210,
::VideoFormat::V210,
::VideoFormat::Uyvp,
::VideoFormat::I42010le,
::VideoFormat::I42010be,
#[cfg(feature = "v1_10")]
::VideoFormat::P01010le,
#[cfg(feature = "v1_14")]
::VideoFormat::Nv1210le32,
#[cfg(feature = "v1_16")]
::VideoFormat::Nv1210le40,
#[cfg(feature = "v1_10")]
::VideoFormat::P01010be,
::VideoFormat::Y444,
::VideoFormat::Gbr,
::VideoFormat::Nv24,
::VideoFormat::Xbgr,
::VideoFormat::Bgrx,
::VideoFormat::Xrgb,
::VideoFormat::Rgbx,
::VideoFormat::Bgr,
#[cfg(feature = "v1_10")]
::VideoFormat::Iyu2,
::VideoFormat::V308,
::VideoFormat::Rgb,
::VideoFormat::Y42b,
::VideoFormat::Nv61,
::VideoFormat::Nv16,
#[cfg(feature = "v1_12")]
::VideoFormat::Vyuy,
::VideoFormat::Uyvy,
::VideoFormat::Yvyu,
::VideoFormat::Yuy2,
::VideoFormat::I420,
::VideoFormat::Yv12,
::VideoFormat::Nv21,
::VideoFormat::Nv12,
::VideoFormat::Nv1264z32,
::VideoFormat::Y41b,
::VideoFormat::Iyu1,
::VideoFormat::Yvu9,
::VideoFormat::Yuv9,
::VideoFormat::Rgb16,
::VideoFormat::Bgr16,
::VideoFormat::Rgb15,
::VideoFormat::Bgr15,
::VideoFormat::Rgb8p,
::VideoFormat::Gray16Le,
::VideoFormat::Gray16Be,
#[cfg(feature = "v1_14")]
::VideoFormat::Gray10Le32,
::VideoFormat::Gray8,
])
}
#[cfg(target_endian = "big")]
{
Box::new([
::VideoFormat::Ayuv64,
::VideoFormat::Argb64,
#[cfg(feature = "v1_12")]
::VideoFormat::Gbra12be,
#[cfg(feature = "v1_12")]
::VideoFormat::Gbra12le,
::VideoFormat::A44410be,
#[cfg(feature = "v1_12")]
::VideoFormat::Gbra10be,
::VideoFormat::A44410le,
#[cfg(feature = "v1_12")]
::VideoFormat::Gbra10le,
::VideoFormat::A42210be,
::VideoFormat::A42210le,
::VideoFormat::A42010be,
::VideoFormat::A42010le,
#[cfg(feature = "v1_16")]
::VideoFormat::Y410,
#[cfg(feature = "v1_16")]
::VideoFormat::Bgr10a2Le,
#[cfg(feature = "v1_12")]
::VideoFormat::Gbra,
::VideoFormat::Abgr,
#[cfg(feature = "v1_16")]
::VideoFormat::Vuya,
::VideoFormat::Bgra,
::VideoFormat::Ayuv,
::VideoFormat::Argb,
::VideoFormat::Rgba,
::VideoFormat::A420,
::VideoFormat::V216,
#[cfg(feature = "v1_12")]
::VideoFormat::Y44412be,
#[cfg(feature = "v1_12")]
::VideoFormat::Gbr12be,
#[cfg(feature = "v1_12")]
::VideoFormat::Y44412le,
#[cfg(feature = "v1_12")]
::VideoFormat::Gbr12le,
#[cfg(feature = "v1_12")]
::VideoFormat::I42212be,
#[cfg(feature = "v1_12")]
::VideoFormat::I42212le,
#[cfg(feature = "v1_12")]
::VideoFormat::I42012be,
#[cfg(feature = "v1_12")]
::VideoFormat::I42012le,
::VideoFormat::Y44410be,
::VideoFormat::Gbr10be,
::VideoFormat::Y44410le,
::VideoFormat::Gbr10le,
::VideoFormat::R210,
::VideoFormat::I42210be,
::VideoFormat::I42210le,
#[cfg(feature = "v1_14")]
::VideoFormat::Nv1610le32,
#[cfg(feature = "v1_16")]
::VideoFormat::Y210,
::VideoFormat::V210,
::VideoFormat::Uyvp,
::VideoFormat::I42010be,
::VideoFormat::I42010le,
#[cfg(feature = "v1_10")]
::VideoFormat::P01010be,
#[cfg(feature = "v1_10")]
::VideoFormat::P01010le,
#[cfg(feature = "v1_14")]
::VideoFormat::Nv1210le32,
#[cfg(feature = "v1_16")]
::VideoFormat::Nv1210le40,
::VideoFormat::Y444,
::VideoFormat::Gbr,
::VideoFormat::Nv24,
::VideoFormat::Xbgr,
::VideoFormat::Bgrx,
::VideoFormat::Xrgb,
::VideoFormat::Rgbx,
::VideoFormat::Bgr,
#[cfg(feature = "v1_10")]
::VideoFormat::Iyu2,
::VideoFormat::V308,
::VideoFormat::Rgb,
::VideoFormat::Y42b,
::VideoFormat::Nv61,
::VideoFormat::Nv16,
#[cfg(feature = "v1_12")]
::VideoFormat::Vyuy,
::VideoFormat::Uyvy,
::VideoFormat::Yvyu,
::VideoFormat::Yuy2,
::VideoFormat::I420,
::VideoFormat::Yv12,
::VideoFormat::Nv21,
::VideoFormat::Nv12,
::VideoFormat::Nv1264z32,
::VideoFormat::Y41b,
::VideoFormat::Iyu1,
::VideoFormat::Yvu9,
::VideoFormat::Yuv9,
::VideoFormat::Rgb16,
::VideoFormat::Bgr16,
::VideoFormat::Rgb15,
::VideoFormat::Bgr15,
::VideoFormat::Rgb8p,
::VideoFormat::Gray16Be,
::VideoFormat::Gray16Le,
#[cfg(feature = "v1_14")]
::VideoFormat::Gray10Le32,
::VideoFormat::Gray8,
])
}
});
#[derive(PartialEq, Eq, Copy, Clone, Debug, Hash)]
pub enum VideoEndianness {
Unknown,
LittleEndian = 1234,
BigEndian = 4321,
}
impl FromGlib<i32> for VideoEndianness {
fn from_glib(value: i32) -> Self {
skip_assert_initialized!();
match value {
1234 => VideoEndianness::LittleEndian,
4321 => VideoEndianness::BigEndian,
_ => VideoEndianness::Unknown,
}
}
}
impl ToGlib for VideoEndianness {
type GlibType = i32;
fn to_glib(&self) -> i32 {
match *self {
VideoEndianness::LittleEndian => 1234,
VideoEndianness::BigEndian => 4321,
_ => 0,
}
}
}
impl ::VideoFormat {
pub fn from_fourcc(fourcc: u32) -> ::VideoFormat {
assert_initialized_main_thread!();
unsafe { from_glib(gst_video_sys::gst_video_format_from_fourcc(fourcc)) }
}
pub fn from_masks(
depth: u32,
bpp: u32,
endianness: ::VideoEndianness,
red_mask: u32,
blue_mask: u32,
green_mask: u32,
alpha_mask: u32,
) -> ::VideoFormat {
assert_initialized_main_thread!();
unsafe {
from_glib(gst_video_sys::gst_video_format_from_masks(
depth as i32,
bpp as i32,
endianness.to_glib(),
red_mask,
blue_mask,
green_mask,
alpha_mask,
))
}
}
pub fn to_str<'a>(self) -> &'a str {
if self == ::VideoFormat::Unknown {
return "UNKNOWN";
}
unsafe {
CStr::from_ptr(gst_video_sys::gst_video_format_to_string(self.to_glib()))
.to_str()
.unwrap()
}
}
pub fn iter_raw() -> VideoFormatIterator {
VideoFormatIterator::default()
}
}
impl str::FromStr for ::VideoFormat {
type Err = glib::BoolError;
fn from_str(s: &str) -> Result<Self, glib::BoolError> {
assert_initialized_main_thread!();
unsafe {
let fmt = ::VideoFormat::from_glib(gst_video_sys::gst_video_format_from_string(
s.to_glib_none().0,
));
if fmt == ::VideoFormat::Unknown {
Err(glib_bool_error!("Failed to parse video format from string"))
} else {
Ok(fmt)
}
}
}
}
impl fmt::Display for ::VideoFormat {
fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
f.write_str((*self).to_str())
}
}
impl PartialOrd for ::VideoFormat {
fn partial_cmp(&self, other: &::VideoFormat) -> Option<std::cmp::Ordering> {
::VideoFormatInfo::from_format(*self).partial_cmp(&::VideoFormatInfo::from_format(*other))
}
}
impl Ord for ::VideoFormat {
fn cmp(&self, other: &::VideoFormat) -> std::cmp::Ordering {
::VideoFormatInfo::from_format(*self).cmp(&::VideoFormatInfo::from_format(*other))
}
}
pub struct VideoFormatIterator {
idx: usize,
len: usize,
}
impl Default for VideoFormatIterator {
fn default() -> Self {
Self {
idx: 0,
len: VIDEO_FORMATS_ALL.len(),
}
}
}
impl Iterator for VideoFormatIterator {
type Item = ::VideoFormat;
fn next(&mut self) -> Option<Self::Item> {
if self.idx >= self.len {
None
} else {
let fmt = VIDEO_FORMATS_ALL[self.idx];
self.idx += 1;
Some(fmt)
}
}
fn size_hint(&self) -> (usize, Option<usize>) {
if self.idx == self.len {
return (0, Some(0));
}
let remaining = (self.len - self.idx) as usize;
(remaining, Some(remaining))
}
}
impl ExactSizeIterator for VideoFormatIterator {}
impl DoubleEndedIterator for VideoFormatIterator {
fn next_back(&mut self) -> Option<Self::Item> {
if self.idx >= self.len {
None
} else {
let fmt = VIDEO_FORMATS_ALL[self.len - 1];
self.len -= 1;
Some(fmt)
}
}
}
pub trait VideoFormatIteratorExt {
fn into_video_caps(self) -> Option<gst::caps::Builder<gst::caps::NoFeature>>;
}
impl<T> VideoFormatIteratorExt for T
where
T: Iterator<Item = ::VideoFormat>,
{
fn into_video_caps(self) -> Option<gst::caps::Builder<gst::caps::NoFeature>> {
let formats: Vec<::VideoFormat> = self.collect();
if !formats.is_empty() {
Some(::functions::video_make_raw_caps(&formats))
} else {
None
}
}
}
pub trait VideoFormatIteratorExtRef {
fn into_video_caps(self) -> Option<gst::caps::Builder<gst::caps::NoFeature>>;
}
impl<'a, T> VideoFormatIteratorExtRef for T
where
T: Iterator<Item = &'a ::VideoFormat>,
{
fn into_video_caps(self) -> Option<gst::caps::Builder<gst::caps::NoFeature>> {
let formats: Vec<::VideoFormat> = self.copied().collect();
if !formats.is_empty() {
Some(::functions::video_make_raw_caps(&formats))
} else {
None
}
}
}
#[cfg(test)]
mod tests {
use gst;
#[test]
fn test_display() {
gst::init().unwrap();
format!("{}", ::VideoFormat::Nv16);
}
#[test]
fn iter() {
use super::*;
gst::init().unwrap();
assert!(::VideoFormat::iter_raw().count() > 0);
assert_eq!(
::VideoFormat::iter_raw().count(),
::VideoFormat::iter_raw().len()
);
let mut i = ::VideoFormat::iter_raw();
let mut count = 0;
loop {
if i.next().is_none() {
break;
}
count += 1;
if i.next_back().is_none() {
break;
}
count += 1;
}
assert_eq!(count, ::VideoFormat::iter_raw().len());
assert!(::VideoFormat::iter_raw().any(|f| f == ::VideoFormat::Nv12));
assert!(::VideoFormat::iter_raw()
.find(|f| *f == ::VideoFormat::Encoded)
.is_none());
let caps = ::VideoFormat::iter_raw().into_video_caps();
assert!(caps.is_some());
let caps = ::VideoFormat::iter_raw()
.filter(|f| ::VideoFormatInfo::from_format(*f).is_gray())
.into_video_caps();
assert!(caps.is_some());
let caps = ::VideoFormat::iter_raw().skip(1000).into_video_caps();
assert!(caps.is_none());
let caps = [::VideoFormat::Nv12, ::VideoFormat::Nv16]
.iter()
.into_video_caps()
.unwrap()
.build();
assert_eq!(caps.to_string(), "video/x-raw, format=(string){ NV12, NV16 }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]");
}
#[cfg(feature = "v1_18")]
#[test]
fn sort() {
use itertools::Itertools;
gst::init().unwrap();
assert!(
::VideoFormatInfo::from_format(::VideoFormat::Nv16)
> ::VideoFormatInfo::from_format(::VideoFormat::Nv12)
);
assert!(::VideoFormat::I420 > ::VideoFormat::Yv12);
let sorted: Vec<::VideoFormat> = ::VideoFormat::iter_raw().sorted().rev().collect();
// FIXME: use is_sorted_by() once API is in stable
assert_eq!(
sorted,
::VideoFormat::iter_raw().collect::<Vec<::VideoFormat>>()
);
}
}
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