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extern crate ffmpeg_next as ffmpeg;
use ffmpeg::codec::Parameters as AvCodecParameters;
use ffmpeg::{Error as AvError, Rational as AvRational};
use crate::{io::Reader, Error};
type Result<T> = std::result::Result<T, Error>;
/// Holds transferable stream information. This can be used to duplicate stream settings for the
/// purpose of transmuxing or transcoding.
#[derive(Clone)]
pub struct StreamInfo {
pub index: usize,
codec_parameters: AvCodecParameters,
time_base: AvRational,
}
impl StreamInfo {
/// Fetch stream information from a reader by stream index.
///
/// # Arguments
///
/// * `reader` - Reader to find stream information from.
/// * `stream_index` - Index of stream in reader.
pub(crate) fn from_reader(reader: &Reader, stream_index: usize) -> Result<Self> {
let stream = reader
.input
.stream(stream_index)
.ok_or(AvError::StreamNotFound)?;
Ok(Self {
index: stream_index,
codec_parameters: stream.parameters(),
time_base: stream.time_base(),
})
}
/// Turn information back into parts for usage.
///
/// Note: Consumes stream information object.
///
/// # Return value
///
/// A tuple consisting of:
/// * The stream index.
/// * Codec parameters.
/// * Original stream time base.
pub(crate) fn into_parts(self) -> (usize, AvCodecParameters, AvRational) {
(self.index, self.codec_parameters, self.time_base)
}
}
unsafe impl Send for StreamInfo {}
unsafe impl Sync for StreamInfo {}