mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-09-26 14:00:12 +00:00
Parser align with frame headers
This commit is contained in:
parent
069c290ae1
commit
eb73b59bf8
6 changed files with 116 additions and 76 deletions
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@ -8,6 +8,7 @@
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use gst::glib;
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mod qoa;
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mod qoadec;
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mod qoaparse;
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mod typefind;
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96
audio/qoa/src/qoa.rs
Normal file
96
audio/qoa/src/qoa.rs
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@ -0,0 +1,96 @@
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use qoaudio::{QOA_HEADER_SIZE, QOA_LMS_LEN};
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use std::fmt;
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pub const MAX_SLICES_PER_CHANNEL_PER_FRAME: usize = 256;
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#[derive(Debug, Copy, Clone)]
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pub struct InvalidFrameHeader;
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#[derive(Debug, Copy, Clone, Default)]
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pub struct FrameHeader {
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/// Number of channels in this frame
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pub channels: u8,
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/// Sample rate in HZ for this frame
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pub sample_rate: u32,
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/// Samples per channel in this frame
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pub num_samples_per_channel: u16,
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/// Total size of the frame (includes header size itself)
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pub frame_size: usize,
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}
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impl FrameHeader {
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/// Parse and validate various traits of a valid frame header.
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pub fn parse(frame_header: u64) -> Result<Self, InvalidFrameHeader> {
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let channels = ((frame_header >> 56) & 0x0000ff) as u8;
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let sample_rate = ((frame_header >> 32) & 0xffffff) as u32;
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let num_samples_per_channel = ((frame_header >> 16) & 0x00ffff) as u16;
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let frame_size = (frame_header & 0x00ffff) as usize;
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if channels == 0 || sample_rate == 0 {
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return Err(InvalidFrameHeader);
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}
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const LMS_SIZE: usize = 4;
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let non_sample_data_size = QOA_HEADER_SIZE + QOA_LMS_LEN * LMS_SIZE * channels as usize;
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if frame_size <= non_sample_data_size {
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return Err(InvalidFrameHeader);
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}
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let data_size = frame_size - non_sample_data_size;
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let num_slices = data_size / 8;
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if num_slices % channels as usize != 0 {
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return Err(InvalidFrameHeader);
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}
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if num_slices / channels as usize > MAX_SLICES_PER_CHANNEL_PER_FRAME {
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return Err(InvalidFrameHeader);
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}
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Ok(FrameHeader {
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channels,
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sample_rate,
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num_samples_per_channel,
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frame_size,
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})
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}
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}
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impl PartialEq for FrameHeader {
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fn eq(&self, other: &Self) -> bool {
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self.channels == other.channels && self.sample_rate == other.sample_rate
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}
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}
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impl fmt::Display for FrameHeader {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(
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f,
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"{{channels={}, sample_rate={}, num_samples_per_channel={}, frame_size={}}}",
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self.channels, self.sample_rate, self.num_samples_per_channel, self.frame_size
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)
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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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#[test]
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fn test_can_parse_valid_frame_header() {
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let frame_header = FrameHeader::parse(0x0200a028000003e8).unwrap();
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assert_eq!(
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frame_header,
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FrameHeader {
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channels: 2,
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sample_rate: 41000,
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num_samples_per_channel: 100,
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frame_size: 1000
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}
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);
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}
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#[test]
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fn test_invalid_frame_header() {
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assert!(FrameHeader::parse(0x0000000000000000).is_err());
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assert!(FrameHeader::parse(0x0420420420420420).is_err());
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}
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}
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@ -8,10 +8,10 @@
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use byte_slice_cast::*;
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use gst::glib;
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use gst::glib::once_cell::sync::Lazy;
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use gst::subclass::prelude::*;
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use gst_audio::prelude::*;
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use gst_audio::subclass::prelude::*;
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use gst::glib::once_cell::sync::Lazy;
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use qoaudio::{DecodedAudio, QoaDecoder};
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use std::sync::{Arc, Mutex};
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@ -6,13 +6,13 @@
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//
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// SPDX-License-Identifier: MPL-2.0
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use crate::qoa::FrameHeader;
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use glib::once_cell::sync::Lazy;
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use gst::glib;
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use gst::subclass::prelude::*;
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use gst_base::prelude::*;
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use gst_base::subclass::prelude::*;
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use qoaudio::{QOA_HEADER_SIZE, QOA_LMS_LEN, QOA_MAGIC, QOA_MIN_FILESIZE};
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use std::fmt;
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use qoaudio::{QOA_HEADER_SIZE, QOA_MAGIC, QOA_MIN_FILESIZE};
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use std::sync::{Arc, Mutex};
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#[derive(Default, Debug, PartialEq)]
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@ -72,7 +72,7 @@ impl ElementImpl for QoaParse {
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let src_caps = gst::Caps::builder("audio/x-qoa")
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.field("parsed", true)
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.field("rate", gst::IntRange::<i32>::new(1, 16777215))
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.field("channels", &gst::IntRange::<i32>::new(1, 255))
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.field("channels", gst::IntRange::<i32>::new(1, 255))
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.build();
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let src_pad_template = gst::PadTemplate::new(
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"src",
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@ -211,71 +211,3 @@ impl BaseParseImpl for QoaParse {
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Ok((gst::FlowSuccess::Ok, 0))
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}
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}
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pub const MAX_SLICES_PER_CHANNEL_PER_FRAME: usize = 256;
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pub struct InvalidFrameHeader;
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#[derive(Debug, Copy, Clone, Default)]
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pub struct FrameHeader {
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/// Number of channels in this frame
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pub channels: u8,
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/// Sample rate in HZ for this frame
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pub sample_rate: u32,
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/// Samples per channel in this frame
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pub num_samples_per_channel: u16,
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/// Total size of the frame (includes header size itself)
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pub frame_size: usize,
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}
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impl FrameHeader {
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/// Parse and validate various traits of a valid frame header.
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fn parse(frame_header: u64) -> Result<Self, InvalidFrameHeader> {
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let channels = ((frame_header >> 56) & 0x0000ff) as u8;
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let sample_rate = ((frame_header >> 32) & 0xffffff) as u32;
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let num_samples_per_channel = ((frame_header >> 16) & 0x00ffff) as u16;
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let frame_size = (frame_header & 0x00ffff) as usize;
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if channels == 0 || sample_rate == 0 {
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return Err(InvalidFrameHeader);
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}
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const LMS_SIZE: usize = 4;
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let non_sample_data_size = QOA_HEADER_SIZE + QOA_LMS_LEN * LMS_SIZE * channels as usize;
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if frame_size <= non_sample_data_size {
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return Err(InvalidFrameHeader);
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}
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let data_size = frame_size - non_sample_data_size;
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let num_slices = data_size / 8;
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if num_slices % channels as usize != 0 {
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return Err(InvalidFrameHeader);
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}
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if num_slices / channels as usize > MAX_SLICES_PER_CHANNEL_PER_FRAME {
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return Err(InvalidFrameHeader);
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}
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Ok(FrameHeader {
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channels,
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sample_rate,
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num_samples_per_channel,
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frame_size,
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})
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}
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}
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impl PartialEq for FrameHeader {
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fn eq(&self, other: &Self) -> bool {
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self.channels == other.channels && self.sample_rate == other.sample_rate
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}
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}
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impl fmt::Display for FrameHeader {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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write!(
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f,
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"{{channels={}, sample_rate={}, num_samples_per_channel={}, frame_size={}}}",
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self.channels, self.sample_rate, self.num_samples_per_channel, self.frame_size
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)
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}
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}
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@ -1,5 +1,7 @@
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use crate::qoa::FrameHeader;
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use gst::glib;
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use gst::{TypeFind, TypeFindProbability};
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use qoaudio::QOA_HEADER_SIZE;
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pub fn register(plugin: &gst::Plugin) -> Result<(), glib::BoolError> {
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TypeFind::register(
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TypeFindProbability::Maximum,
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&gst::Caps::builder("audio/x-qoa").build(),
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);
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} else {
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let raw_header =
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u64::from_be_bytes(data[0..QOA_HEADER_SIZE].try_into().unwrap());
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if let Ok(_header) = FrameHeader::parse(raw_header) {
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typefind.suggest(
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TypeFindProbability::Likely,
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&gst::Caps::builder("audio/x-qoa").build(),
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);
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}
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}
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}
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},
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@ -14,15 +14,15 @@ fn init() {
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fn find_the_type_of_qoa_data() {
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init();
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let src = gst_app::AppSrc::builder()
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.is_live(true)
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.build();
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let src = gst_app::AppSrc::builder().is_live(true).build();
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let typefind = gst::ElementFactory::make("typefind").build().unwrap();
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let fakesink = gst::ElementFactory::make("fakesink").build().unwrap();
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let pipeline = gst::Pipeline::new();
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pipeline.add_many(&[src.upcast_ref(), &typefind, &fakesink]).unwrap();
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pipeline
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.add_many(&[src.upcast_ref(), &typefind, &fakesink])
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.unwrap();
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gst::Element::link_many(&[src.upcast_ref(), &typefind, &fakesink]).unwrap();
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pipeline.set_state(gst::State::Playing).unwrap();
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