129 lines
3.7 KiB
Rust
129 lines
3.7 KiB
Rust
use byteorder::{LittleEndian, ReadBytesExt};
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use gst::prelude::*;
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use gstreamer_app as gst_app;
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use hound::{WavSpec, WavWriter};
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use log::{debug, error, info, trace, warn};
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use std::fs::File;
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use std::io::{Cursor, Write};
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use std::process;
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use std::sync::{Arc, Mutex};
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fn main() -> eyre::Result<()> {
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pretty_env_logger::init();
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gst::init()?;
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let pipeline = gst::parse_launch(
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r#"
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uridecodebin uri=file:///Users/rafael.caricio/video.mkv name=dec dec.src_1 ! audio/x-raw !
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audioconvert ! audiorate ! audioresample ! audio/x-raw,format=S16LE,rate=48000,channels=1 ! appsink name=sink
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"#,
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)?
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.downcast::<gst::Pipeline>()
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.unwrap();
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info!("Starting pipeline...");
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let demuxer = pipeline.by_name("dec").unwrap();
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demuxer.connect_pad_added(|_, pad| {
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let name = pad.name();
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let caps = pad.caps().unwrap();
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let caps_type = caps.structure(0).unwrap().name();
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debug!("Pad {} added with caps {}", name, caps_type);
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});
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let raw_audio_content = Arc::new(Mutex::new(Vec::new()));
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let app_sink = pipeline
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.by_name("sink")
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.unwrap()
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.downcast::<gst_app::AppSink>()
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.unwrap();
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app_sink.set_sync(false);
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app_sink.set_callbacks(
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gst_app::AppSinkCallbacks::builder()
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.new_sample({
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let raw_audio_content = raw_audio_content.clone();
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move |app| {
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let sample = app.pull_sample().unwrap();
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let buffer = sample.buffer().unwrap();
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let data = buffer.map_readable().unwrap();
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let mut raw_audio_content = raw_audio_content.lock().unwrap();
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raw_audio_content.extend(data.to_vec());
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Ok(gst::FlowSuccess::Ok)
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}
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})
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.build(),
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);
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let context = glib::MainContext::default();
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let main_loop = glib::MainLoop::new(Some(&context), false);
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pipeline.set_state(gst::State::Playing)?;
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let bus = pipeline.bus().unwrap();
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bus.add_watch({
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let main_loop = main_loop.clone();
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move |_, msg| {
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use gst::MessageView;
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let main_loop = &main_loop;
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match msg.view() {
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MessageView::Eos(..) => main_loop.quit(),
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MessageView::Error(err) => {
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println!(
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"Error from {:?}: {} ({:?})",
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err.src().map(|s| s.path_string()),
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err.error(),
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err.debug()
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);
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main_loop.quit();
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}
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_ => (),
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};
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glib::Continue(true)
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}
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})
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.expect("Failed to add bus watch");
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ctrlc::set_handler({
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let pipeline_weak = pipeline.downgrade();
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move || {
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let pipeline = pipeline_weak.upgrade().unwrap();
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pipeline.set_state(gst::State::Null).unwrap();
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}
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})?;
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main_loop.run();
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bus.remove_watch().unwrap();
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pipeline.set_state(gst::State::Null)?;
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let mut out_wav_buffer = Cursor::new(Vec::new());
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let mut writer = WavWriter::new(
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&mut out_wav_buffer,
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WavSpec {
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channels: 1,
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sample_rate: 48000,
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bits_per_sample: 16,
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sample_format: hound::SampleFormat::Int,
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},
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)
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.unwrap();
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let mut raw_audio_content = Cursor::new(raw_audio_content.lock().unwrap().to_vec());
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while let Ok(sample) = raw_audio_content.read_i16::<LittleEndian>() {
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writer.write_sample(sample).unwrap();
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}
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drop(writer);
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let mut file = File::create("out.wav")?;
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file.write_all(&out_wav_buffer.into_inner())?;
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Ok(())
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}
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