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https://gitlab.freedesktop.org/gstreamer/gstreamer-rs.git
synced 2024-06-02 21:39:24 +00:00
99 lines
3.6 KiB
Rust
99 lines
3.6 KiB
Rust
extern crate gstreamer as gst;
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use gst::prelude::*;
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#[path = "../tutorials-common.rs"]
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mod tutorials_common;
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fn tutorial_main() {
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// Initialize GStreamer
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if let Err(err) = gst::init() {
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eprintln!("Failed to initialize Gst: {}", err);
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return;
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}
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let audio_source = gst::ElementFactory::make("audiotestsrc", "audio_source").unwrap();
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let tee = gst::ElementFactory::make("tee", "tee").unwrap();
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let audio_queue = gst::ElementFactory::make("queue", "audio_queue").unwrap();
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let audio_convert = gst::ElementFactory::make("audioconvert", "audio_convert").unwrap();
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let audio_resample = gst::ElementFactory::make("audioresample", "audio_resample").unwrap();
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let audio_sink = gst::ElementFactory::make("autoaudiosink", "audio_sink").unwrap();
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let video_queue = gst::ElementFactory::make("queue", "video_queue").unwrap();
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let visual = gst::ElementFactory::make("wavescope", "visual").unwrap();
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let video_convert = gst::ElementFactory::make("videoconvert", "video_convert").unwrap();
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let video_sink = gst::ElementFactory::make("autovideosink", "video_sink").unwrap();
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let pipeline = gst::Pipeline::new("test-pipeline");
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audio_source.set_property("freq", &215.0).unwrap();
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visual.set_property_from_str("shader", "none");
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visual.set_property_from_str("style", "lines");
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pipeline
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.add_many(&[
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&audio_source,
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&tee,
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&audio_queue,
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&audio_convert,
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&audio_resample,
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&audio_sink,
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&video_queue,
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&visual,
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&video_convert,
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&video_sink,
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])
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.unwrap();
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gst::Element::link_many(&[&audio_source, &tee]).unwrap();
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gst::Element::link_many(&[&audio_queue, &audio_convert, &audio_resample, &audio_sink]).unwrap();
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gst::Element::link_many(&[&video_queue, &visual, &video_convert, &video_sink]).unwrap();
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let tee_audio_pad = tee.get_request_pad("src_%u").unwrap();
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println!(
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"Obtained request pad {} for audio branch",
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tee_audio_pad.get_name()
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);
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let queue_audio_pad = audio_queue.get_static_pad("sink").unwrap();
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tee_audio_pad.link(&queue_audio_pad).into_result().unwrap();
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let tee_video_pad = tee.get_request_pad("src_%u").unwrap();
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println!(
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"Obtained request pad {} for video branch",
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tee_video_pad.get_name()
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);
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let queue_video_pad = video_queue.get_static_pad("sink").unwrap();
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tee_video_pad.link(&queue_video_pad).into_result().unwrap();
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pipeline
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.set_state(gst::State::Playing)
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.into_result()
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.expect("Unable to set the pipeline to the Playing state.");
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let bus = pipeline.get_bus().unwrap();
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while let Some(msg) = bus.timed_pop(gst::CLOCK_TIME_NONE) {
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use gst::MessageView;
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match msg.view() {
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MessageView::Error(err) => {
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eprintln!(
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"Error received from element {:?}: {}",
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msg.get_src().map(|s| s.get_path_string()),
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err.get_error()
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);
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eprintln!("Debugging information: {:?}", err.get_debug());
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break;
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}
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MessageView::Eos(..) => break,
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_ => (),
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}
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}
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pipeline
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.set_state(gst::State::Null)
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.into_result()
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.expect("Unable to set the pipeline to the Null state.");
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}
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fn main() {
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// tutorials_common::run is only required to set up the application environment on macOS
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// (but not necessary in normal Cocoa applications where this is set up automatically)
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tutorials_common::run(tutorial_main);
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}
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