mirror of
https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs.git
synced 2024-11-29 15:01:07 +00:00
Add gst-plugin-ndi
This commit is contained in:
rubenrua
parent
6c19cc8d9f
commit
337337854b
5 changed files with 1184 additions and 0 deletions
275
gst-plugin-ndi/Cargo.lock
generated
Normal file
275
gst-plugin-ndi/Cargo.lock
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@ -0,0 +1,275 @@
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[[package]]
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name = "array-init"
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version = "0.0.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"nodrop 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "bitflags"
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version = "1.0.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "byte-slice-cast"
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version = "0.1.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "byteorder"
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version = "1.2.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "cfg-if"
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version = "0.1.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "glib"
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version = "0.5.0"
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source = "git+https://github.com/gtk-rs/glib#cae39ff7a72073a553f5b60321bd9389db00ac3b"
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dependencies = [
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"bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"glib-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gobject-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "glib-sys"
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version = "0.6.0"
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source = "git+https://github.com/gtk-rs/sys#ce1fffe51a6498ac278502bf1afb18d711ad0250"
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dependencies = [
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"libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
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"pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "gobject-sys"
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version = "0.6.0"
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source = "git+https://github.com/gtk-rs/sys#ce1fffe51a6498ac278502bf1afb18d711ad0250"
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dependencies = [
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"glib-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
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"pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "gst-plugin"
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version = "0.1.0"
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source = "git+https://github.com/sdroege/gst-plugin-rs#f2f18ebb278f66f09995148cf9790ed469f6357f"
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dependencies = [
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"byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
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"glib 0.5.0 (git+https://github.com/gtk-rs/glib)",
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"glib-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gobject-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gstreamer 0.12.0 (git+https://github.com/sdroege/gstreamer-rs)",
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"gstreamer-base 0.12.0 (git+https://github.com/sdroege/gstreamer-rs)",
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"gstreamer-base-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)",
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"gstreamer-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)",
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"lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "gst-plugin-ndi"
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version = "0.1.0"
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dependencies = [
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"byte-slice-cast 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"glib 0.5.0 (git+https://github.com/gtk-rs/glib)",
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"gst-plugin 0.1.0 (git+https://github.com/sdroege/gst-plugin-rs)",
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"gstreamer 0.12.0 (git+https://github.com/sdroege/gstreamer-rs)",
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"gstreamer-audio 0.12.0 (git+https://github.com/sdroege/gstreamer-rs)",
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"gstreamer-base 0.12.0 (git+https://github.com/sdroege/gstreamer-rs)",
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"gstreamer-video 0.12.0 (git+https://github.com/sdroege/gstreamer-rs)",
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"num-traits 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "gstreamer"
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version = "0.12.0"
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source = "git+https://github.com/sdroege/gstreamer-rs#5dd17d6248b45fa2536f1864962908fb21b041e8"
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dependencies = [
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"bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
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"glib 0.5.0 (git+https://github.com/gtk-rs/glib)",
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"glib-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gobject-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gstreamer-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)",
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"lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
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"libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
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"muldiv 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"num-rational 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "gstreamer-audio"
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version = "0.12.0"
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source = "git+https://github.com/sdroege/gstreamer-rs#5dd17d6248b45fa2536f1864962908fb21b041e8"
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dependencies = [
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"array-init 0.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
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"bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"glib 0.5.0 (git+https://github.com/gtk-rs/glib)",
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"glib-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gobject-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gstreamer 0.12.0 (git+https://github.com/sdroege/gstreamer-rs)",
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"gstreamer-audio-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)",
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"gstreamer-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)",
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]
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[[package]]
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name = "gstreamer-audio-sys"
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version = "0.6.0"
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source = "git+https://github.com/sdroege/gstreamer-sys#a9a4608562bcd377f116d5d4806bff439eca5168"
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dependencies = [
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"glib-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gobject-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gstreamer-base-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)",
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"gstreamer-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)",
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"libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
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"pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "gstreamer-base"
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version = "0.12.0"
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source = "git+https://github.com/sdroege/gstreamer-rs#5dd17d6248b45fa2536f1864962908fb21b041e8"
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dependencies = [
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"bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"glib 0.5.0 (git+https://github.com/gtk-rs/glib)",
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"glib-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gobject-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gstreamer 0.12.0 (git+https://github.com/sdroege/gstreamer-rs)",
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"gstreamer-base-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)",
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"gstreamer-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)",
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]
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[[package]]
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name = "gstreamer-base-sys"
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version = "0.6.0"
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source = "git+https://github.com/sdroege/gstreamer-sys#a9a4608562bcd377f116d5d4806bff439eca5168"
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dependencies = [
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"glib-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gobject-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
|
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"gstreamer-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)",
|
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"libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
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"pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "gstreamer-sys"
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version = "0.6.0"
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source = "git+https://github.com/sdroege/gstreamer-sys#a9a4608562bcd377f116d5d4806bff439eca5168"
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dependencies = [
|
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"glib-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gobject-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
|
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"libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
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"pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "gstreamer-video"
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version = "0.12.0"
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source = "git+https://github.com/sdroege/gstreamer-rs#5dd17d6248b45fa2536f1864962908fb21b041e8"
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dependencies = [
|
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"bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
|
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"glib 0.5.0 (git+https://github.com/gtk-rs/glib)",
|
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"glib-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gobject-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gstreamer 0.12.0 (git+https://github.com/sdroege/gstreamer-rs)",
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"gstreamer-base 0.12.0 (git+https://github.com/sdroege/gstreamer-rs)",
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"gstreamer-base-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)",
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|
"gstreamer-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)",
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"gstreamer-video-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)",
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"libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "gstreamer-video-sys"
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version = "0.6.0"
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source = "git+https://github.com/sdroege/gstreamer-sys#a9a4608562bcd377f116d5d4806bff439eca5168"
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dependencies = [
|
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"glib-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gobject-sys 0.6.0 (git+https://github.com/gtk-rs/sys)",
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"gstreamer-base-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)",
|
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"gstreamer-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)",
|
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"libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)",
|
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"pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "lazy_static"
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version = "1.0.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "libc"
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version = "0.2.40"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "muldiv"
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version = "0.1.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "nodrop"
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version = "0.1.12"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "num-integer"
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version = "0.1.36"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
|
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"num-traits 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "num-rational"
|
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version = "0.1.42"
|
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source = "registry+https://github.com/rust-lang/crates.io-index"
|
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dependencies = [
|
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|
"num-integer 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
|
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|
"num-traits 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
|
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[[package]]
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|
name = "num-traits"
|
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|
version = "0.2.2"
|
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|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
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|
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|
[[package]]
|
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|
name = "pkg-config"
|
||||||
|
version = "0.3.9"
|
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|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
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|
|
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|
[metadata]
|
||||||
|
"checksum array-init 0.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4d3b508d35216892b50a135fb52c9bb90f04a97b7782230805dff1a156ad5469"
|
||||||
|
"checksum bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b3c30d3802dfb7281680d6285f2ccdaa8c2d8fee41f93805dba5c4cf50dc23cf"
|
||||||
|
"checksum byte-slice-cast 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5a865e7bfa6c3b79216ccba767d4dc66e4f9f65f1ed4639e73faff3c4a2485d7"
|
||||||
|
"checksum byteorder 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "73b5bdfe7ee3ad0b99c9801d58807a9dbc9e09196365b0203853b99889ab3c87"
|
||||||
|
"checksum cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "d4c819a1287eb618df47cc647173c5c4c66ba19d888a6e50d605672aed3140de"
|
||||||
|
"checksum glib 0.5.0 (git+https://github.com/gtk-rs/glib)" = "<none>"
|
||||||
|
"checksum glib-sys 0.6.0 (git+https://github.com/gtk-rs/sys)" = "<none>"
|
||||||
|
"checksum gobject-sys 0.6.0 (git+https://github.com/gtk-rs/sys)" = "<none>"
|
||||||
|
"checksum gst-plugin 0.1.0 (git+https://github.com/sdroege/gst-plugin-rs)" = "<none>"
|
||||||
|
"checksum gstreamer 0.12.0 (git+https://github.com/sdroege/gstreamer-rs)" = "<none>"
|
||||||
|
"checksum gstreamer-audio 0.12.0 (git+https://github.com/sdroege/gstreamer-rs)" = "<none>"
|
||||||
|
"checksum gstreamer-audio-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)" = "<none>"
|
||||||
|
"checksum gstreamer-base 0.12.0 (git+https://github.com/sdroege/gstreamer-rs)" = "<none>"
|
||||||
|
"checksum gstreamer-base-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)" = "<none>"
|
||||||
|
"checksum gstreamer-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)" = "<none>"
|
||||||
|
"checksum gstreamer-video 0.12.0 (git+https://github.com/sdroege/gstreamer-rs)" = "<none>"
|
||||||
|
"checksum gstreamer-video-sys 0.6.0 (git+https://github.com/sdroege/gstreamer-sys)" = "<none>"
|
||||||
|
"checksum lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c8f31047daa365f19be14b47c29df4f7c3b581832407daabe6ae77397619237d"
|
||||||
|
"checksum libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)" = "6fd41f331ac7c5b8ac259b8bf82c75c0fb2e469bbf37d2becbba9a6a2221965b"
|
||||||
|
"checksum muldiv 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1cbef5aa2e8cd82a18cc20e26434cc9843e1ef46e55bfabe5bddb022236c5b3e"
|
||||||
|
"checksum nodrop 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "9a2228dca57108069a5262f2ed8bd2e82496d2e074a06d1ccc7ce1687b6ae0a2"
|
||||||
|
"checksum num-integer 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)" = "f8d26da319fb45674985c78f1d1caf99aa4941f785d384a2ae36d0740bc3e2fe"
|
||||||
|
"checksum num-rational 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "ee314c74bd753fc86b4780aa9475da469155f3848473a261d2d18e35245a784e"
|
||||||
|
"checksum num-traits 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "dee092fcdf725aee04dd7da1d21debff559237d49ef1cb3e69bcb8ece44c7364"
|
||||||
|
"checksum pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "3a8b4c6b8165cd1a1cd4b9b120978131389f64bdaf456435caa41e630edba903"
|
||||||
21
gst-plugin-ndi/Cargo.toml
Normal file
21
gst-plugin-ndi/Cargo.toml
Normal file
|
|
@ -0,0 +1,21 @@
|
||||||
|
[package]
|
||||||
|
name = "gst-plugin-ndi"
|
||||||
|
version = "0.1.0"
|
||||||
|
authors = ["Ruben Gonzalez <rubenrua@teltek.es>"]
|
||||||
|
repository = "https://gitlab.teltek.es/rubenrua/ndi-rs.git"
|
||||||
|
license = "unknow" # TODO MIT/Apache-2.0
|
||||||
|
|
||||||
|
[dependencies]
|
||||||
|
gst-plugin = { git = "https://github.com/sdroege/gst-plugin-rs" }
|
||||||
|
glib = { git = "https://github.com/gtk-rs/glib" }
|
||||||
|
gstreamer = { git = "https://github.com/sdroege/gstreamer-rs" }
|
||||||
|
gstreamer-base = { git = "https://github.com/sdroege/gstreamer-rs" }
|
||||||
|
gstreamer-video = { git = "https://github.com/sdroege/gstreamer-rs" }
|
||||||
|
gstreamer-audio = { git = "https://github.com/sdroege/gstreamer-rs" }
|
||||||
|
byte-slice-cast = "0.1" # TODO delete
|
||||||
|
num-traits = "0.2" # TODO delete
|
||||||
|
|
||||||
|
[lib]
|
||||||
|
name = "gstndi"
|
||||||
|
crate-type = ["cdylib"]
|
||||||
|
path = "src/lib.rs"
|
||||||
11
gst-plugin-ndi/README.md
Normal file
11
gst-plugin-ndi/README.md
Normal file
|
|
@ -0,0 +1,11 @@
|
||||||
|
TODO
|
||||||
|
====
|
||||||
|
|
||||||
|
Test
|
||||||
|
-------
|
||||||
|
|
||||||
|
```
|
||||||
|
cargo build
|
||||||
|
export GST_PLUGIN_PATH=`pwd`/target/debug
|
||||||
|
gst-inspect-1.0 ndisrc
|
||||||
|
```
|
||||||
45
gst-plugin-ndi/src/lib.rs
Normal file
45
gst-plugin-ndi/src/lib.rs
Normal file
|
|
@ -0,0 +1,45 @@
|
||||||
|
// Copyright (C) 2017 Sebastian Dröge <sebastian@centricular.com>
|
||||||
|
//
|
||||||
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
||||||
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
||||||
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
||||||
|
// option. This file may not be copied, modified, or distributed
|
||||||
|
// except according to those terms.
|
||||||
|
|
||||||
|
extern crate glib;
|
||||||
|
#[macro_use]
|
||||||
|
extern crate gst_plugin;
|
||||||
|
#[macro_use]
|
||||||
|
extern crate gstreamer as gst;
|
||||||
|
extern crate gstreamer_audio as gst_audio;
|
||||||
|
extern crate gstreamer_base as gst_base;
|
||||||
|
extern crate gstreamer_video as gst_video;
|
||||||
|
|
||||||
|
extern crate byte_slice_cast;
|
||||||
|
extern crate num_traits;
|
||||||
|
|
||||||
|
mod ndisrc;
|
||||||
|
|
||||||
|
// Plugin entry point that should register all elements provided by this plugin,
|
||||||
|
// and everything else that this plugin might provide (e.g. typefinders or device providers).
|
||||||
|
fn plugin_init(plugin: &gst::Plugin) -> bool {
|
||||||
|
ndisrc::register(plugin);
|
||||||
|
true
|
||||||
|
}
|
||||||
|
|
||||||
|
// Static plugin metdata that is directly stored in the plugin shared object and read by GStreamer
|
||||||
|
// upon loading.
|
||||||
|
// Plugin name, plugin description, plugin entry point function, version number of this plugin,
|
||||||
|
// license of the plugin, source package name, binary package name, origin where it comes from
|
||||||
|
// and the date/time of release.
|
||||||
|
plugin_define!(
|
||||||
|
b"ndi\0",
|
||||||
|
b"NewTek NDI Plugin\0",
|
||||||
|
plugin_init,
|
||||||
|
b"1.0\0",
|
||||||
|
b"MIT/X11\0",
|
||||||
|
b"ndi\0",
|
||||||
|
b"ndi\0",
|
||||||
|
b"https://gitlab.teltek.es/rubenrua/ndi-rs.git\0",
|
||||||
|
b"2018-04-09\0"
|
||||||
|
);
|
||||||
832
gst-plugin-ndi/src/ndisrc.rs
Normal file
832
gst-plugin-ndi/src/ndisrc.rs
Normal file
|
|
@ -0,0 +1,832 @@
|
||||||
|
// Copyright (C) 2018 Sebastian Dröge <sebastian@centricular.com>
|
||||||
|
//
|
||||||
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
||||||
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
||||||
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
||||||
|
// option. This file may not be copied, modified, or distributed
|
||||||
|
// except according to those terms.
|
||||||
|
|
||||||
|
use glib;
|
||||||
|
use gst;
|
||||||
|
use gst::prelude::*;
|
||||||
|
use gst_audio;
|
||||||
|
use gst_base::prelude::*;
|
||||||
|
|
||||||
|
use byte_slice_cast::*;
|
||||||
|
|
||||||
|
use gst_plugin::base_src::*;
|
||||||
|
use gst_plugin::element::*;
|
||||||
|
use gst_plugin::object::*;
|
||||||
|
use gst_plugin::properties::*;
|
||||||
|
|
||||||
|
use std::ops::Rem;
|
||||||
|
use std::sync::Mutex;
|
||||||
|
use std::{i32, u32};
|
||||||
|
|
||||||
|
use num_traits::cast::NumCast;
|
||||||
|
use num_traits::float::Float;
|
||||||
|
|
||||||
|
// Default values of properties
|
||||||
|
const DEFAULT_SAMPLES_PER_BUFFER: u32 = 1024;
|
||||||
|
const DEFAULT_FREQ: u32 = 440;
|
||||||
|
const DEFAULT_VOLUME: f64 = 0.8;
|
||||||
|
const DEFAULT_MUTE: bool = false;
|
||||||
|
const DEFAULT_IS_LIVE: bool = false;
|
||||||
|
|
||||||
|
// Property value storage
|
||||||
|
#[derive(Debug, Clone, Copy)]
|
||||||
|
struct Settings {
|
||||||
|
samples_per_buffer: u32,
|
||||||
|
freq: u32,
|
||||||
|
volume: f64,
|
||||||
|
mute: bool,
|
||||||
|
is_live: bool,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Default for Settings {
|
||||||
|
fn default() -> Self {
|
||||||
|
Settings {
|
||||||
|
samples_per_buffer: DEFAULT_SAMPLES_PER_BUFFER,
|
||||||
|
freq: DEFAULT_FREQ,
|
||||||
|
volume: DEFAULT_VOLUME,
|
||||||
|
mute: DEFAULT_MUTE,
|
||||||
|
is_live: DEFAULT_IS_LIVE,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Metadata for the properties
|
||||||
|
static PROPERTIES: [Property; 5] = [
|
||||||
|
Property::UInt(
|
||||||
|
"samples-per-buffer",
|
||||||
|
"Samples Per Buffer",
|
||||||
|
"Number of samples per output buffer",
|
||||||
|
(1, u32::MAX),
|
||||||
|
DEFAULT_SAMPLES_PER_BUFFER,
|
||||||
|
PropertyMutability::ReadWrite,
|
||||||
|
),
|
||||||
|
Property::UInt(
|
||||||
|
"freq",
|
||||||
|
"Frequency",
|
||||||
|
"Frequency",
|
||||||
|
(1, u32::MAX),
|
||||||
|
DEFAULT_FREQ,
|
||||||
|
PropertyMutability::ReadWrite,
|
||||||
|
),
|
||||||
|
Property::Double(
|
||||||
|
"volume",
|
||||||
|
"Volume",
|
||||||
|
"Output volume",
|
||||||
|
(0.0, 10.0),
|
||||||
|
DEFAULT_VOLUME,
|
||||||
|
PropertyMutability::ReadWrite,
|
||||||
|
),
|
||||||
|
Property::Boolean(
|
||||||
|
"mute",
|
||||||
|
"Mute",
|
||||||
|
"Mute",
|
||||||
|
DEFAULT_MUTE,
|
||||||
|
PropertyMutability::ReadWrite,
|
||||||
|
),
|
||||||
|
Property::Boolean(
|
||||||
|
"is-live",
|
||||||
|
"Is Live",
|
||||||
|
"(Pseudo) live output",
|
||||||
|
DEFAULT_IS_LIVE,
|
||||||
|
PropertyMutability::ReadWrite,
|
||||||
|
),
|
||||||
|
];
|
||||||
|
|
||||||
|
// Stream-specific state, i.e. audio format configuration
|
||||||
|
// and sample offset
|
||||||
|
struct State {
|
||||||
|
info: Option<gst_audio::AudioInfo>,
|
||||||
|
sample_offset: u64,
|
||||||
|
sample_stop: Option<u64>,
|
||||||
|
accumulator: f64,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Default for State {
|
||||||
|
fn default() -> State {
|
||||||
|
State {
|
||||||
|
info: None,
|
||||||
|
sample_offset: 0,
|
||||||
|
sample_stop: None,
|
||||||
|
accumulator: 0.0,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
struct ClockWait {
|
||||||
|
clock_id: Option<gst::ClockId>,
|
||||||
|
flushing: bool,
|
||||||
|
}
|
||||||
|
|
||||||
|
// Struct containing all the element data
|
||||||
|
struct NdiSrc {
|
||||||
|
cat: gst::DebugCategory,
|
||||||
|
settings: Mutex<Settings>,
|
||||||
|
state: Mutex<State>,
|
||||||
|
clock_wait: Mutex<ClockWait>,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl NdiSrc {
|
||||||
|
// Called when a new instance is to be created
|
||||||
|
fn new(element: &BaseSrc) -> Box<BaseSrcImpl<BaseSrc>> {
|
||||||
|
// Initialize live-ness and notify the base class that
|
||||||
|
// we'd like to operate in Time format
|
||||||
|
element.set_live(DEFAULT_IS_LIVE);
|
||||||
|
element.set_format(gst::Format::Time);
|
||||||
|
|
||||||
|
Box::new(Self {
|
||||||
|
cat: gst::DebugCategory::new(
|
||||||
|
"ndisrc",
|
||||||
|
gst::DebugColorFlags::empty(),
|
||||||
|
"NewTek NDI Source",
|
||||||
|
),
|
||||||
|
settings: Mutex::new(Default::default()),
|
||||||
|
state: Mutex::new(Default::default()),
|
||||||
|
clock_wait: Mutex::new(ClockWait {
|
||||||
|
clock_id: None,
|
||||||
|
flushing: true,
|
||||||
|
}),
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
// Called exactly once when registering the type. Used for
|
||||||
|
// setting up metadata for all instances, e.g. the name and
|
||||||
|
// classification and the pad templates with their caps.
|
||||||
|
//
|
||||||
|
// Actual instances can create pads based on those pad templates
|
||||||
|
// with a subset of the caps given here. In case of basesrc,
|
||||||
|
// a "src" and "sink" pad template are required here and the base class
|
||||||
|
// will automatically instantiate pads for them.
|
||||||
|
//
|
||||||
|
// Our element here can output f32 and f64
|
||||||
|
fn class_init(klass: &mut BaseSrcClass) {
|
||||||
|
klass.set_metadata(
|
||||||
|
"NewTek NDI Source",
|
||||||
|
"Source",
|
||||||
|
"NewTek NDI video/audio source",
|
||||||
|
"Ruben Gonzalez <rubenrua@teltek.es>",
|
||||||
|
);
|
||||||
|
|
||||||
|
// On the src pad, we can produce F32/F64 with any sample rate
|
||||||
|
// and any number of channels
|
||||||
|
let caps = gst::Caps::new_simple(
|
||||||
|
"audio/x-raw",
|
||||||
|
&[
|
||||||
|
(
|
||||||
|
"format",
|
||||||
|
&gst::List::new(&[
|
||||||
|
&gst_audio::AUDIO_FORMAT_F32.to_string(),
|
||||||
|
&gst_audio::AUDIO_FORMAT_F64.to_string(),
|
||||||
|
]),
|
||||||
|
),
|
||||||
|
("layout", &"interleaved"),
|
||||||
|
("rate", &gst::IntRange::<i32>::new(1, i32::MAX)),
|
||||||
|
("channels", &gst::IntRange::<i32>::new(1, i32::MAX)),
|
||||||
|
],
|
||||||
|
);
|
||||||
|
// The src pad template must be named "src" for basesrc
|
||||||
|
// and specific a pad that is always there
|
||||||
|
let src_pad_template = gst::PadTemplate::new(
|
||||||
|
"src",
|
||||||
|
gst::PadDirection::Src,
|
||||||
|
gst::PadPresence::Always,
|
||||||
|
&caps,
|
||||||
|
);
|
||||||
|
klass.add_pad_template(src_pad_template);
|
||||||
|
|
||||||
|
// Install all our properties
|
||||||
|
klass.install_properties(&PROPERTIES);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn process<F: Float + FromByteSlice>(
|
||||||
|
data: &mut [u8],
|
||||||
|
accumulator_ref: &mut f64,
|
||||||
|
freq: u32,
|
||||||
|
rate: u32,
|
||||||
|
channels: u32,
|
||||||
|
vol: f64,
|
||||||
|
) {
|
||||||
|
use std::f64::consts::PI;
|
||||||
|
|
||||||
|
// Reinterpret our byte-slice as a slice containing elements of the type
|
||||||
|
// we're interested in. GStreamer requires for raw audio that the alignment
|
||||||
|
// of memory is correct, so this will never ever fail unless there is an
|
||||||
|
// actual bug elsewhere.
|
||||||
|
let data = data.as_mut_slice_of::<F>().unwrap();
|
||||||
|
|
||||||
|
// Convert all our parameters to the target type for calculations
|
||||||
|
let vol: F = NumCast::from(vol).unwrap();
|
||||||
|
let freq = freq as f64;
|
||||||
|
let rate = rate as f64;
|
||||||
|
let two_pi = 2.0 * PI;
|
||||||
|
|
||||||
|
// We're carrying a accumulator with up to 2pi around instead of working
|
||||||
|
// on the sample offset. High sample offsets cause too much inaccuracy when
|
||||||
|
// converted to floating point numbers and then iterated over in 1-steps
|
||||||
|
let mut accumulator = *accumulator_ref;
|
||||||
|
let step = two_pi * freq / rate;
|
||||||
|
|
||||||
|
for chunk in data.chunks_mut(channels as usize) {
|
||||||
|
let value = vol * F::sin(NumCast::from(accumulator).unwrap());
|
||||||
|
for sample in chunk {
|
||||||
|
*sample = value;
|
||||||
|
}
|
||||||
|
|
||||||
|
accumulator += step;
|
||||||
|
if accumulator >= two_pi {
|
||||||
|
accumulator -= two_pi;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
*accumulator_ref = accumulator;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Virtual methods of GObject itself
|
||||||
|
impl ObjectImpl<BaseSrc> for NdiSrc {
|
||||||
|
// Called whenever a value of a property is changed. It can be called
|
||||||
|
// at any time from any thread.
|
||||||
|
fn set_property(&self, obj: &glib::Object, id: u32, value: &glib::Value) {
|
||||||
|
let prop = &PROPERTIES[id as usize];
|
||||||
|
let element = obj.clone().downcast::<BaseSrc>().unwrap();
|
||||||
|
|
||||||
|
match *prop {
|
||||||
|
Property::UInt("samples-per-buffer", ..) => {
|
||||||
|
let mut settings = self.settings.lock().unwrap();
|
||||||
|
let samples_per_buffer = value.get().unwrap();
|
||||||
|
gst_info!(
|
||||||
|
self.cat,
|
||||||
|
obj: &element,
|
||||||
|
"Changing samples-per-buffer from {} to {}",
|
||||||
|
settings.samples_per_buffer,
|
||||||
|
samples_per_buffer
|
||||||
|
);
|
||||||
|
settings.samples_per_buffer = samples_per_buffer;
|
||||||
|
drop(settings);
|
||||||
|
|
||||||
|
let _ =
|
||||||
|
element.post_message(&gst::Message::new_latency().src(Some(&element)).build());
|
||||||
|
}
|
||||||
|
Property::UInt("freq", ..) => {
|
||||||
|
let mut settings = self.settings.lock().unwrap();
|
||||||
|
let freq = value.get().unwrap();
|
||||||
|
gst_info!(
|
||||||
|
self.cat,
|
||||||
|
obj: &element,
|
||||||
|
"Changing freq from {} to {}",
|
||||||
|
settings.freq,
|
||||||
|
freq
|
||||||
|
);
|
||||||
|
settings.freq = freq;
|
||||||
|
}
|
||||||
|
Property::Double("volume", ..) => {
|
||||||
|
let mut settings = self.settings.lock().unwrap();
|
||||||
|
let volume = value.get().unwrap();
|
||||||
|
gst_info!(
|
||||||
|
self.cat,
|
||||||
|
obj: &element,
|
||||||
|
"Changing volume from {} to {}",
|
||||||
|
settings.volume,
|
||||||
|
volume
|
||||||
|
);
|
||||||
|
settings.volume = volume;
|
||||||
|
}
|
||||||
|
Property::Boolean("mute", ..) => {
|
||||||
|
let mut settings = self.settings.lock().unwrap();
|
||||||
|
let mute = value.get().unwrap();
|
||||||
|
gst_info!(
|
||||||
|
self.cat,
|
||||||
|
obj: &element,
|
||||||
|
"Changing mute from {} to {}",
|
||||||
|
settings.mute,
|
||||||
|
mute
|
||||||
|
);
|
||||||
|
settings.mute = mute;
|
||||||
|
}
|
||||||
|
Property::Boolean("is-live", ..) => {
|
||||||
|
let mut settings = self.settings.lock().unwrap();
|
||||||
|
let is_live = value.get().unwrap();
|
||||||
|
gst_info!(
|
||||||
|
self.cat,
|
||||||
|
obj: &element,
|
||||||
|
"Changing is-live from {} to {}",
|
||||||
|
settings.is_live,
|
||||||
|
is_live
|
||||||
|
);
|
||||||
|
settings.is_live = is_live;
|
||||||
|
}
|
||||||
|
_ => unimplemented!(),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Called whenever a value of a property is read. It can be called
|
||||||
|
// at any time from any thread.
|
||||||
|
fn get_property(&self, _obj: &glib::Object, id: u32) -> Result<glib::Value, ()> {
|
||||||
|
let prop = &PROPERTIES[id as usize];
|
||||||
|
|
||||||
|
match *prop {
|
||||||
|
Property::UInt("samples-per-buffer", ..) => {
|
||||||
|
let settings = self.settings.lock().unwrap();
|
||||||
|
Ok(settings.samples_per_buffer.to_value())
|
||||||
|
}
|
||||||
|
Property::UInt("freq", ..) => {
|
||||||
|
let settings = self.settings.lock().unwrap();
|
||||||
|
Ok(settings.freq.to_value())
|
||||||
|
}
|
||||||
|
Property::Double("volume", ..) => {
|
||||||
|
let settings = self.settings.lock().unwrap();
|
||||||
|
Ok(settings.volume.to_value())
|
||||||
|
}
|
||||||
|
Property::Boolean("mute", ..) => {
|
||||||
|
let settings = self.settings.lock().unwrap();
|
||||||
|
Ok(settings.mute.to_value())
|
||||||
|
}
|
||||||
|
Property::Boolean("is-live", ..) => {
|
||||||
|
let settings = self.settings.lock().unwrap();
|
||||||
|
Ok(settings.is_live.to_value())
|
||||||
|
}
|
||||||
|
_ => unimplemented!(),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Virtual methods of gst::Element. We override none
|
||||||
|
impl ElementImpl<BaseSrc> for NdiSrc {
|
||||||
|
fn change_state(
|
||||||
|
&self,
|
||||||
|
element: &BaseSrc,
|
||||||
|
transition: gst::StateChange,
|
||||||
|
) -> gst::StateChangeReturn {
|
||||||
|
// Configure live'ness once here just before starting the source
|
||||||
|
match transition {
|
||||||
|
gst::StateChange::ReadyToPaused => {
|
||||||
|
element.set_live(self.settings.lock().unwrap().is_live);
|
||||||
|
}
|
||||||
|
_ => (),
|
||||||
|
}
|
||||||
|
|
||||||
|
element.parent_change_state(transition)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Virtual methods of gst_base::BaseSrc
|
||||||
|
impl BaseSrcImpl<BaseSrc> for NdiSrc {
|
||||||
|
// Called whenever the input/output caps are changing, i.e. in the very beginning before data
|
||||||
|
// flow happens and whenever the situation in the pipeline is changing. All buffers after this
|
||||||
|
// call have the caps given here.
|
||||||
|
//
|
||||||
|
// We simply remember the resulting AudioInfo from the caps to be able to use this for knowing
|
||||||
|
// the sample rate, etc. when creating buffers
|
||||||
|
fn set_caps(&self, element: &BaseSrc, caps: &gst::CapsRef) -> bool {
|
||||||
|
use std::f64::consts::PI;
|
||||||
|
|
||||||
|
let info = match gst_audio::AudioInfo::from_caps(caps) {
|
||||||
|
None => return false,
|
||||||
|
Some(info) => info,
|
||||||
|
};
|
||||||
|
|
||||||
|
gst_debug!(self.cat, obj: element, "Configuring for caps {}", caps);
|
||||||
|
|
||||||
|
element.set_blocksize(info.bpf() * (*self.settings.lock().unwrap()).samples_per_buffer);
|
||||||
|
|
||||||
|
let settings = *self.settings.lock().unwrap();
|
||||||
|
let mut state = self.state.lock().unwrap();
|
||||||
|
|
||||||
|
// If we have no caps yet, any old sample_offset and sample_stop will be
|
||||||
|
// in nanoseconds
|
||||||
|
let old_rate = match state.info {
|
||||||
|
Some(ref info) => info.rate() as u64,
|
||||||
|
None => gst::SECOND_VAL,
|
||||||
|
};
|
||||||
|
|
||||||
|
// Update sample offset and accumulator based on the previous values and the
|
||||||
|
// sample rate change, if any
|
||||||
|
let old_sample_offset = state.sample_offset;
|
||||||
|
let sample_offset = old_sample_offset
|
||||||
|
.mul_div_floor(info.rate() as u64, old_rate)
|
||||||
|
.unwrap();
|
||||||
|
|
||||||
|
let old_sample_stop = state.sample_stop;
|
||||||
|
let sample_stop =
|
||||||
|
old_sample_stop.map(|v| v.mul_div_floor(info.rate() as u64, old_rate).unwrap());
|
||||||
|
|
||||||
|
let accumulator =
|
||||||
|
(sample_offset as f64).rem(2.0 * PI * (settings.freq as f64) / (info.rate() as f64));
|
||||||
|
|
||||||
|
*state = State {
|
||||||
|
info: Some(info),
|
||||||
|
sample_offset: sample_offset,
|
||||||
|
sample_stop: sample_stop,
|
||||||
|
accumulator: accumulator,
|
||||||
|
};
|
||||||
|
|
||||||
|
drop(state);
|
||||||
|
|
||||||
|
let _ = element.post_message(&gst::Message::new_latency().src(Some(element)).build());
|
||||||
|
|
||||||
|
true
|
||||||
|
}
|
||||||
|
|
||||||
|
// Called when starting, so we can initialize all stream-related state to its defaults
|
||||||
|
fn start(&self, element: &BaseSrc) -> bool {
|
||||||
|
// Reset state
|
||||||
|
*self.state.lock().unwrap() = Default::default();
|
||||||
|
self.unlock_stop(element);
|
||||||
|
|
||||||
|
gst_info!(self.cat, obj: element, "Started");
|
||||||
|
|
||||||
|
true
|
||||||
|
}
|
||||||
|
|
||||||
|
// Called when shutting down the element so we can release all stream-related state
|
||||||
|
fn stop(&self, element: &BaseSrc) -> bool {
|
||||||
|
// Reset state
|
||||||
|
*self.state.lock().unwrap() = Default::default();
|
||||||
|
self.unlock(element);
|
||||||
|
|
||||||
|
gst_info!(self.cat, obj: element, "Stopped");
|
||||||
|
|
||||||
|
true
|
||||||
|
}
|
||||||
|
|
||||||
|
fn query(&self, element: &BaseSrc, query: &mut gst::QueryRef) -> bool {
|
||||||
|
use gst::QueryView;
|
||||||
|
|
||||||
|
match query.view_mut() {
|
||||||
|
// We only work in Push mode. In Pull mode, create() could be called with
|
||||||
|
// arbitrary offsets and we would have to produce for that specific offset
|
||||||
|
QueryView::Scheduling(ref mut q) => {
|
||||||
|
q.set(gst::SchedulingFlags::SEQUENTIAL, 1, -1, 0);
|
||||||
|
q.add_scheduling_modes(&[gst::PadMode::Push]);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
// In Live mode we will have a latency equal to the number of samples in each buffer.
|
||||||
|
// We can't output samples before they were produced, and the last sample of a buffer
|
||||||
|
// is produced that much after the beginning, leading to this latency calculation
|
||||||
|
QueryView::Latency(ref mut q) => {
|
||||||
|
let settings = *self.settings.lock().unwrap();
|
||||||
|
let state = self.state.lock().unwrap();
|
||||||
|
|
||||||
|
if let Some(ref info) = state.info {
|
||||||
|
let latency = gst::SECOND
|
||||||
|
.mul_div_floor(settings.samples_per_buffer as u64, info.rate() as u64)
|
||||||
|
.unwrap();
|
||||||
|
gst_debug!(self.cat, obj: element, "Returning latency {}", latency);
|
||||||
|
q.set(settings.is_live, latency, gst::CLOCK_TIME_NONE);
|
||||||
|
return true;
|
||||||
|
} else {
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
_ => (),
|
||||||
|
}
|
||||||
|
BaseSrcBase::parent_query(element, query)
|
||||||
|
}
|
||||||
|
|
||||||
|
// Creates the audio buffers
|
||||||
|
fn create(
|
||||||
|
&self,
|
||||||
|
element: &BaseSrc,
|
||||||
|
_offset: u64,
|
||||||
|
_length: u32,
|
||||||
|
) -> Result<gst::Buffer, gst::FlowReturn> {
|
||||||
|
// Keep a local copy of the values of all our properties at this very moment. This
|
||||||
|
// ensures that the mutex is never locked for long and the application wouldn't
|
||||||
|
// have to block until this function returns when getting/setting property values
|
||||||
|
let settings = *self.settings.lock().unwrap();
|
||||||
|
|
||||||
|
// Get a locked reference to our state, i.e. the input and output AudioInfo
|
||||||
|
let mut state = self.state.lock().unwrap();
|
||||||
|
let info = match state.info {
|
||||||
|
None => {
|
||||||
|
gst_element_error!(element, gst::CoreError::Negotiation, ["Have no caps yet"]);
|
||||||
|
return Err(gst::FlowReturn::NotNegotiated);
|
||||||
|
}
|
||||||
|
Some(ref info) => info.clone(),
|
||||||
|
};
|
||||||
|
|
||||||
|
// If a stop position is set (from a seek), only produce samples up to that
|
||||||
|
// point but at most samples_per_buffer samples per buffer
|
||||||
|
let n_samples = if let Some(sample_stop) = state.sample_stop {
|
||||||
|
if sample_stop <= state.sample_offset {
|
||||||
|
gst_log!(self.cat, obj: element, "At EOS");
|
||||||
|
return Err(gst::FlowReturn::Eos);
|
||||||
|
}
|
||||||
|
|
||||||
|
sample_stop - state.sample_offset
|
||||||
|
} else {
|
||||||
|
settings.samples_per_buffer as u64
|
||||||
|
};
|
||||||
|
|
||||||
|
// Allocate a new buffer of the required size, update the metadata with the
|
||||||
|
// current timestamp and duration and then fill it according to the current
|
||||||
|
// caps
|
||||||
|
let mut buffer =
|
||||||
|
gst::Buffer::with_size((n_samples as usize) * (info.bpf() as usize)).unwrap();
|
||||||
|
{
|
||||||
|
let buffer = buffer.get_mut().unwrap();
|
||||||
|
|
||||||
|
// Calculate the current timestamp (PTS) and the next one,
|
||||||
|
// and calculate the duration from the difference instead of
|
||||||
|
// simply the number of samples to prevent rounding errors
|
||||||
|
let pts = state
|
||||||
|
.sample_offset
|
||||||
|
.mul_div_floor(gst::SECOND_VAL, info.rate() as u64)
|
||||||
|
.unwrap()
|
||||||
|
.into();
|
||||||
|
let next_pts: gst::ClockTime = (state.sample_offset + n_samples)
|
||||||
|
.mul_div_floor(gst::SECOND_VAL, info.rate() as u64)
|
||||||
|
.unwrap()
|
||||||
|
.into();
|
||||||
|
buffer.set_pts(pts);
|
||||||
|
buffer.set_duration(next_pts - pts);
|
||||||
|
|
||||||
|
// Map the buffer writable and create the actual samples
|
||||||
|
let mut map = buffer.map_writable().unwrap();
|
||||||
|
let data = map.as_mut_slice();
|
||||||
|
|
||||||
|
if info.format() == gst_audio::AUDIO_FORMAT_F32 {
|
||||||
|
Self::process::<f32>(
|
||||||
|
data,
|
||||||
|
&mut state.accumulator,
|
||||||
|
settings.freq,
|
||||||
|
info.rate(),
|
||||||
|
info.channels(),
|
||||||
|
settings.volume,
|
||||||
|
);
|
||||||
|
} else {
|
||||||
|
Self::process::<f64>(
|
||||||
|
data,
|
||||||
|
&mut state.accumulator,
|
||||||
|
settings.freq,
|
||||||
|
info.rate(),
|
||||||
|
info.channels(),
|
||||||
|
settings.volume,
|
||||||
|
);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
state.sample_offset += n_samples;
|
||||||
|
drop(state);
|
||||||
|
|
||||||
|
// If we're live, we are waiting until the time of the last sample in our buffer has
|
||||||
|
// arrived. This is the very reason why we have to report that much latency.
|
||||||
|
// A real live-source would of course only allow us to have the data available after
|
||||||
|
// that latency, e.g. when capturing from a microphone, and no waiting from our side
|
||||||
|
// would be necessary..
|
||||||
|
//
|
||||||
|
// Waiting happens based on the pipeline clock, which means that a real live source
|
||||||
|
// with its own clock would require various translations between the two clocks.
|
||||||
|
// This is out of scope for the tutorial though.
|
||||||
|
if element.is_live() {
|
||||||
|
let clock = match element.get_clock() {
|
||||||
|
None => return Ok(buffer),
|
||||||
|
Some(clock) => clock,
|
||||||
|
};
|
||||||
|
|
||||||
|
let segment = element
|
||||||
|
.get_segment()
|
||||||
|
.downcast::<gst::format::Time>()
|
||||||
|
.unwrap();
|
||||||
|
let base_time = element.get_base_time();
|
||||||
|
let running_time = segment.to_running_time(buffer.get_pts() + buffer.get_duration());
|
||||||
|
|
||||||
|
// The last sample's clock time is the base time of the element plus the
|
||||||
|
// running time of the last sample
|
||||||
|
let wait_until = running_time + base_time;
|
||||||
|
if wait_until.is_none() {
|
||||||
|
return Ok(buffer);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Store the clock ID in our struct unless we're flushing anyway.
|
||||||
|
// This allows to asynchronously cancel the waiting from unlock()
|
||||||
|
// so that we immediately stop waiting on e.g. shutdown.
|
||||||
|
let mut clock_wait = self.clock_wait.lock().unwrap();
|
||||||
|
if clock_wait.flushing {
|
||||||
|
gst_debug!(self.cat, obj: element, "Flushing");
|
||||||
|
return Err(gst::FlowReturn::Flushing);
|
||||||
|
}
|
||||||
|
|
||||||
|
let id = clock.new_single_shot_id(wait_until).unwrap();
|
||||||
|
clock_wait.clock_id = Some(id.clone());
|
||||||
|
drop(clock_wait);
|
||||||
|
|
||||||
|
gst_log!(
|
||||||
|
self.cat,
|
||||||
|
obj: element,
|
||||||
|
"Waiting until {}, now {}",
|
||||||
|
wait_until,
|
||||||
|
clock.get_time()
|
||||||
|
);
|
||||||
|
let (res, jitter) = id.wait();
|
||||||
|
gst_log!(
|
||||||
|
self.cat,
|
||||||
|
obj: element,
|
||||||
|
"Waited res {:?} jitter {}",
|
||||||
|
res,
|
||||||
|
jitter
|
||||||
|
);
|
||||||
|
self.clock_wait.lock().unwrap().clock_id.take();
|
||||||
|
|
||||||
|
// If the clock ID was unscheduled, unlock() was called
|
||||||
|
// and we should return Flushing immediately.
|
||||||
|
if res == gst::ClockReturn::Unscheduled {
|
||||||
|
gst_debug!(self.cat, obj: element, "Flushing");
|
||||||
|
return Err(gst::FlowReturn::Flushing);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
gst_debug!(self.cat, obj: element, "Produced buffer {:?}", buffer);
|
||||||
|
|
||||||
|
Ok(buffer)
|
||||||
|
}
|
||||||
|
|
||||||
|
fn fixate(&self, element: &BaseSrc, caps: gst::Caps) -> gst::Caps {
|
||||||
|
// Fixate the caps. BaseSrc will do some fixation for us, but
|
||||||
|
// as we allow any rate between 1 and MAX it would fixate to 1. 1Hz
|
||||||
|
// is generally not a useful sample rate.
|
||||||
|
//
|
||||||
|
// We fixate to the closest integer value to 48kHz that is possible
|
||||||
|
// here, and for good measure also decide that the closest value to 1
|
||||||
|
// channel is good.
|
||||||
|
let mut caps = gst::Caps::truncate(caps);
|
||||||
|
{
|
||||||
|
let caps = caps.make_mut();
|
||||||
|
let s = caps.get_mut_structure(0).unwrap();
|
||||||
|
s.fixate_field_nearest_int("rate", 48_000);
|
||||||
|
s.fixate_field_nearest_int("channels", 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
// Let BaseSrc fixate anything else for us. We could've alternatively have
|
||||||
|
// called Caps::fixate() here
|
||||||
|
element.parent_fixate(caps)
|
||||||
|
}
|
||||||
|
|
||||||
|
fn is_seekable(&self, _element: &BaseSrc) -> bool {
|
||||||
|
true
|
||||||
|
}
|
||||||
|
|
||||||
|
fn do_seek(&self, element: &BaseSrc, segment: &mut gst::Segment) -> bool {
|
||||||
|
// Handle seeking here. For Time and Default (sample offset) seeks we can
|
||||||
|
// do something and have to update our sample offset and accumulator accordingly.
|
||||||
|
//
|
||||||
|
// Also we should remember the stop time (so we can stop at that point), and if
|
||||||
|
// reverse playback is requested. These values will all be used during buffer creation
|
||||||
|
// and for calculating the timestamps, etc.
|
||||||
|
|
||||||
|
if segment.get_rate() < 0.0 {
|
||||||
|
gst_error!(self.cat, obj: element, "Reverse playback not supported");
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
let settings = *self.settings.lock().unwrap();
|
||||||
|
let mut state = self.state.lock().unwrap();
|
||||||
|
|
||||||
|
// We store sample_offset and sample_stop in nanoseconds if we
|
||||||
|
// don't know any sample rate yet. It will be converted correctly
|
||||||
|
// once a sample rate is known.
|
||||||
|
let rate = match state.info {
|
||||||
|
None => gst::SECOND_VAL,
|
||||||
|
Some(ref info) => info.rate() as u64,
|
||||||
|
};
|
||||||
|
|
||||||
|
if let Some(segment) = segment.downcast_ref::<gst::format::Time>() {
|
||||||
|
use std::f64::consts::PI;
|
||||||
|
|
||||||
|
let sample_offset = segment
|
||||||
|
.get_start()
|
||||||
|
.unwrap()
|
||||||
|
.mul_div_floor(rate, gst::SECOND_VAL)
|
||||||
|
.unwrap();
|
||||||
|
|
||||||
|
let sample_stop = segment
|
||||||
|
.get_stop()
|
||||||
|
.map(|v| v.mul_div_floor(rate, gst::SECOND_VAL).unwrap());
|
||||||
|
|
||||||
|
let accumulator =
|
||||||
|
(sample_offset as f64).rem(2.0 * PI * (settings.freq as f64) / (rate as f64));
|
||||||
|
|
||||||
|
gst_debug!(
|
||||||
|
self.cat,
|
||||||
|
obj: element,
|
||||||
|
"Seeked to {}-{:?} (accum: {}) for segment {:?}",
|
||||||
|
sample_offset,
|
||||||
|
sample_stop,
|
||||||
|
accumulator,
|
||||||
|
segment
|
||||||
|
);
|
||||||
|
|
||||||
|
*state = State {
|
||||||
|
info: state.info.clone(),
|
||||||
|
sample_offset: sample_offset,
|
||||||
|
sample_stop: sample_stop,
|
||||||
|
accumulator: accumulator,
|
||||||
|
};
|
||||||
|
|
||||||
|
true
|
||||||
|
} else if let Some(segment) = segment.downcast_ref::<gst::format::Default>() {
|
||||||
|
use std::f64::consts::PI;
|
||||||
|
|
||||||
|
if state.info.is_none() {
|
||||||
|
gst_error!(
|
||||||
|
self.cat,
|
||||||
|
obj: element,
|
||||||
|
"Can only seek in Default format if sample rate is known"
|
||||||
|
);
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
let sample_offset = segment.get_start().unwrap();
|
||||||
|
let sample_stop = segment.get_stop().0;
|
||||||
|
|
||||||
|
let accumulator =
|
||||||
|
(sample_offset as f64).rem(2.0 * PI * (settings.freq as f64) / (rate as f64));
|
||||||
|
|
||||||
|
gst_debug!(
|
||||||
|
self.cat,
|
||||||
|
obj: element,
|
||||||
|
"Seeked to {}-{:?} (accum: {}) for segment {:?}",
|
||||||
|
sample_offset,
|
||||||
|
sample_stop,
|
||||||
|
accumulator,
|
||||||
|
segment
|
||||||
|
);
|
||||||
|
|
||||||
|
*state = State {
|
||||||
|
info: state.info.clone(),
|
||||||
|
sample_offset: sample_offset,
|
||||||
|
sample_stop: sample_stop,
|
||||||
|
accumulator: accumulator,
|
||||||
|
};
|
||||||
|
|
||||||
|
true
|
||||||
|
} else {
|
||||||
|
gst_error!(
|
||||||
|
self.cat,
|
||||||
|
obj: element,
|
||||||
|
"Can't seek in format {:?}",
|
||||||
|
segment.get_format()
|
||||||
|
);
|
||||||
|
|
||||||
|
false
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn unlock(&self, element: &BaseSrc) -> bool {
|
||||||
|
// This should unblock the create() function ASAP, so we
|
||||||
|
// just unschedule the clock it here, if any.
|
||||||
|
gst_debug!(self.cat, obj: element, "Unlocking");
|
||||||
|
let mut clock_wait = self.clock_wait.lock().unwrap();
|
||||||
|
if let Some(clock_id) = clock_wait.clock_id.take() {
|
||||||
|
clock_id.unschedule();
|
||||||
|
}
|
||||||
|
clock_wait.flushing = true;
|
||||||
|
|
||||||
|
true
|
||||||
|
}
|
||||||
|
|
||||||
|
fn unlock_stop(&self, element: &BaseSrc) -> bool {
|
||||||
|
// This signals that unlocking is done, so we can reset
|
||||||
|
// all values again.
|
||||||
|
gst_debug!(self.cat, obj: element, "Unlock stop");
|
||||||
|
let mut clock_wait = self.clock_wait.lock().unwrap();
|
||||||
|
clock_wait.flushing = false;
|
||||||
|
|
||||||
|
true
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// This zero-sized struct is containing the static metadata of our element. It is only necessary to
|
||||||
|
// be able to implement traits on it, but e.g. a plugin that registers multiple elements with the
|
||||||
|
// same code would use this struct to store information about the concrete element. An example of
|
||||||
|
// this would be a plugin that wraps around a library that has multiple decoders with the same API,
|
||||||
|
// but wants (as it should) a separate element registered for each decoder.
|
||||||
|
struct NdiSrcStatic;
|
||||||
|
|
||||||
|
// The basic trait for registering the type: This returns a name for the type and registers the
|
||||||
|
// instance and class initializations functions with the type system, thus hooking everything
|
||||||
|
// together.
|
||||||
|
impl ImplTypeStatic<BaseSrc> for NdiSrcStatic {
|
||||||
|
fn get_name(&self) -> &str {
|
||||||
|
"NdiSrc"
|
||||||
|
}
|
||||||
|
|
||||||
|
fn new(&self, element: &BaseSrc) -> Box<BaseSrcImpl<BaseSrc>> {
|
||||||
|
NdiSrc::new(element)
|
||||||
|
}
|
||||||
|
|
||||||
|
fn class_init(&self, klass: &mut BaseSrcClass) {
|
||||||
|
NdiSrc::class_init(klass);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Registers the type for our element, and then registers in GStreamer under
|
||||||
|
// the name "ndisrc" for being able to instantiate it via e.g.
|
||||||
|
// gst::ElementFactory::make().
|
||||||
|
pub fn register(plugin: &gst::Plugin) {
|
||||||
|
let type_ = register_type(NdiSrcStatic);
|
||||||
|
gst::Element::register(plugin, "ndisrc", 0, type_);
|
||||||
|
}
|
||||||
Loading…
Reference in a new issue