1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129

use libc::c_int;
use ffi::*;
use ::codec::{self, packet};
use ::{Rational, Discard};
use super::Disposition;
use format::context::common::Context;

pub struct Stream<'a> {
	context: &'a Context,
	index:   usize,
}

impl<'a> Stream<'a> {
	pub unsafe fn wrap(context: &Context, index: usize) -> Stream {
		Stream { context: context, index: index }
	}

	pub unsafe fn as_ptr(&self) -> *const AVStream {
		*(*self.context.as_ptr()).streams.offset(self.index as isize)
	}
}

impl<'a> Stream<'a> {
	pub fn codec(&self) -> codec::Context {
		unsafe {
			codec::Context::wrap((*self.as_ptr()).codec, Some(self.context.destructor()))
		}
	}

	pub fn index(&self) -> usize {
		unsafe {
			(*self.as_ptr()).index as usize
		}
	}

	pub fn time_base(&self) -> Rational {
		unsafe {
			Rational::from((*self.as_ptr()).time_base)
		}
	}

	pub fn start_time(&self) -> i64 {
		unsafe {
			(*self.as_ptr()).start_time
		}
	}

	pub fn duration(&self) -> i64 {
		unsafe {
			(*self.as_ptr()).duration
		}
	}

	pub fn frames(&self) -> i64 {
		unsafe {
			(*self.as_ptr()).nb_frames
		}
	}

	pub fn disposition(&self) -> Disposition {
		unsafe {
			Disposition::from_bits_truncate((*self.as_ptr()).disposition)
		}
	}

	pub fn discard(&self) -> Discard {
		unsafe {
			Discard::from((*self.as_ptr()).discard)
		}
	}

	pub fn side_data(&self) -> SideDataIter {
		SideDataIter::new(self)
	}

	pub fn rate(&self) -> Rational {
		unsafe {
			Rational::from(av_stream_get_r_frame_rate(self.as_ptr()))
		}
	}
}

impl<'a> PartialEq for Stream<'a> {
	fn eq(&self, other: &Self) -> bool {
		unsafe {
			self.as_ptr() == other.as_ptr()
		}
	}
}

impl<'a> Eq for Stream<'a> { }

pub struct SideDataIter<'a> {
	stream: &'a Stream<'a>,
	current: c_int,
}

impl<'a> SideDataIter<'a> {
	pub fn new<'sd, 's: 'sd>(stream: &'s Stream) -> SideDataIter<'sd> {
		SideDataIter { stream: stream, current: 0 }
	}
}

impl<'a> Iterator for SideDataIter<'a> {
	type Item = packet::SideData<'a>;

	fn next(&mut self) -> Option<<Self as Iterator>::Item> {
		unsafe {
			if self.current >= (*self.stream.as_ptr()).nb_side_data {
				return None;
			}

			self.current += 1;

			Some(packet::SideData::wrap(
				(*self.stream.as_ptr()).side_data.offset((self.current - 1) as isize)))
		}
	}

	fn size_hint(&self) -> (usize, Option<usize>) {
		unsafe {
			let length = (*self.stream.as_ptr()).nb_side_data as usize;

			(length - self.current as usize, Some(length - self.current as usize))
		}
	}
}

impl<'a> ExactSizeIterator for SideDataIter<'a> { }