lv2apply port to zig, episode 1
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3 changed files with 439 additions and 126 deletions
125
.gitignore
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.gitignore
vendored
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@ -1,124 +1 @@
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# Byte-compiled / optimized / DLL files
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__pycache__/
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*.py[cod]
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*$py.class
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# C extensions
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*.so
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# Distribution / packaging
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.Python
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build/
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develop-eggs/
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dist/
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downloads/
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eggs/
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.eggs/
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lib/
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lib64/
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parts/
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sdist/
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var/
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wheels/
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pip-wheel-metadata/
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share/python-wheels/
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*.egg-info/
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.installed.cfg
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*.egg
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MANIFEST
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# PyInstaller
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# Usually these files are written by a python script from a template
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# before PyInstaller builds the exe, so as to inject date/other infos into it.
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*.manifest
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*.spec
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# Installer logs
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pip-log.txt
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pip-delete-this-directory.txt
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# Unit test / coverage reports
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htmlcov/
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.tox/
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.nox/
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.coverage
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.coverage.*
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.cache
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nosetests.xml
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coverage.xml
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*.cover
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.hypothesis/
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.pytest_cache/
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# Translations
|
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*.mo
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*.pot
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|
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# Django stuff:
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*.log
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local_settings.py
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db.sqlite3
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db.sqlite3-journal
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# Flask stuff:
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instance/
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.webassets-cache
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# Scrapy stuff:
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.scrapy
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# Sphinx documentation
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docs/_build/
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# PyBuilder
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target/
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# Jupyter Notebook
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.ipynb_checkpoints
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# IPython
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profile_default/
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ipython_config.py
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# pyenv
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.python-version
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# pipenv
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# According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
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# However, in case of collaboration, if having platform-specific dependencies or dependencies
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# having no cross-platform support, pipenv may install dependencies that don't work, or not
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# install all needed dependencies.
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#Pipfile.lock
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# celery beat schedule file
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celerybeat-schedule
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# SageMath parsed files
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*.sage.py
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# Environments
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.env
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.venv
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env/
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venv/
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ENV/
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env.bak/
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venv.bak/
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# Spyder project settings
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.spyderproject
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# Rope project settings
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.ropeproject
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# mkdocs documentation
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/site
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# mypy
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||||
.mypy_cache/
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.dmypy.json
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dmypy.json
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||||
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# Pyre type checker
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.pyre/
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zig-cache/
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@ -6,6 +6,12 @@ pub fn build(b: *Builder) void {
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exe.setBuildMode(mode);
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exe.install();
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exe.linkSystemLibrary("lilv-0");
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exe.linkSystemLibrary("sndfile");
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exe.linkSystemLibrary("c");
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exe.addIncludeDir("/usr/include/lilv-0");
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const run_cmd = exe.run();
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run_cmd.step.dependOn(b.getInstallStep());
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434
src/main.zig
434
src/main.zig
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@ -1,5 +1,435 @@
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// Copyright 2007-2016 David Robillard <http://drobilla.net>
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// Copyright 2019 Luna Mendes <https://l4.pm>
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//
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// the main script is a fork/port of lv2apply, licensed under the ISC license.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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const std = @import("std");
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pub fn main() anyerror!void {
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std.debug.warn("All your base are belong to us.\n");
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const c = @cImport({
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@cInclude("assert.h");
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@cInclude("math.h");
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@cInclude("sndfile.h");
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@cInclude("stdarg.h");
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@cInclude("stdio.h");
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@cInclude("stdlib.h");
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@cInclude("string.h");
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@cInclude("lilv/lilv.h");
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@cInclude("lv2/core/lv2.h");
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@cDefine("LILV_VERSION", "0.24.4");
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});
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const LV2_CORE_URI = "http://lv2plug.in/ns/lv2core";
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fn Lv2Core(comptime ns: []const u8) []const u8 {
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return (LV2_CORE_URI ++ ns)[0..];
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}
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const LV2_CORE__InputPort = Lv2Core("#InputPort");
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const LV2_CORE__OutputPort = Lv2Core("#OutputPort");
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const LV2_CORE__AudioPort = Lv2Core("#AudioPort");
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const LV2_CORE__ControlPort = Lv2Core("#ControlPort");
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const LV2_CORE__connectionOptional = Lv2Core("#connectionOptional");
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/// Control port value set from the command line
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const Param = struct {
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/// Port symbol
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sym: []const u8,
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/// Control value
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value: f32,
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};
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const ParamList = std.ArrayList(Param);
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const PortType = enum {
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Control,
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Audio,
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};
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/// Runtime port information.
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const Port = struct {
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lilv_port: *const c.LilvPort,
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ptype: PortType,
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index: u32,
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value: f32,
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is_input: bool,
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optional: bool,
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};
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/// Application state
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const LV2Apply = struct {
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allocator: *std.mem.Allocator,
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world: *c.LilvWorld = undefined,
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plugin: *const c.LilvPlugin = undefined,
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instance: *c.LilvInstance = undefined,
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in_path: []u8 = undefined,
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out_path: []u8 = undefined,
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in_file: *c.SNDFILE = undefined,
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out_file: *c.SNDFILE = undefined,
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n_params: u32,
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params: ParamList,
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n_audio_in: u32,
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n_audio_out: u32,
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ports: []*Port = undefined,
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pub fn deinit(self: *LV2Apply) void {
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sclose(self.in_path, self.in_file);
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sclose(self.out_path, self.out_file);
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c.lilv_instance_free(self.instance);
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c.lilv_world_free(self.world);
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self.allocator.free(self.ports);
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self.params.deinit();
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}
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pub fn createPorts(self: *LV2Apply) !i32 {
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var world = self.world;
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const n_ports: u32 = c.lilv_plugin_get_num_ports(self.plugin);
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self.ports = try self.allocator.realloc(self.ports, n_ports);
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var values: []f32 = try self.allocator.alloc(f32, n_ports);
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defer self.allocator.free(values);
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c.lilv_plugin_get_port_ranges_float(self.plugin, null, null, values.ptr);
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var lv2_InputPort = c.lilv_new_uri(world, LV2_CORE__InputPort.ptr);
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defer std.heap.c_allocator.destroy(lv2_InputPort);
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var lv2_OutputPort = c.lilv_new_uri(world, LV2_CORE__OutputPort.ptr);
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defer std.heap.c_allocator.destroy(lv2_OutputPort);
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var lv2_AudioPort = c.lilv_new_uri(world, LV2_CORE__AudioPort.ptr);
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defer std.heap.c_allocator.destroy(lv2_AudioPort);
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var lv2_ControlPort = c.lilv_new_uri(world, LV2_CORE__ControlPort.ptr);
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defer std.heap.c_allocator.destroy(lv2_ControlPort);
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var lv2_connectionOptional = c.lilv_new_uri(world, LV2_CORE__connectionOptional.ptr);
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defer std.heap.c_allocator.destroy(lv2_connectionOptional);
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var i: u32 = 0;
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while (i < n_ports) : (i += 1) {
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var port: *Port = self.ports[i];
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const lport = c.lilv_plugin_get_port_by_index(self.plugin, i).?;
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port.lilv_port = lport;
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port.index = i;
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if (std.math.isNan(values[i])) {
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port.value = f32(0);
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} else {
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port.value = values[i];
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}
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port.optional = c.lilv_port_has_property(self.plugin, lport, lv2_connectionOptional);
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if (c.lilv_port_is_a(self.plugin, lport, lv2_InputPort)) {
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port.is_input = true;
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} else if (!c.lilv_port_is_a(self.plugin, lport, lv2_OutputPort) and !port.optional) {
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std.debug.warn("Port {} is neither input or output\n", i);
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return error.UnassignedIOPort;
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}
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// check if port is an audio or control port
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if (c.lilv_port_is_a(self.plugin, lport, lv2_ControlPort)) {
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port.ptype = .Control;
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} else if (c.lilv_port_is_a(self.plugin, lport, lv2_AudioPort)) {
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port.ptype = .Audio;
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if (port.is_input) {
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self.n_audio_in += 1;
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} else {
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self.n_audio_out += 1;
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}
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} else if (!port.optional) {
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std.debug.warn("Port {} has unsupported type\n", i);
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return error.UnsupportedPortType;
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}
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}
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return 0;
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}
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};
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fn sopen(path: []const u8, mode: i32, fmt: *c.SF_INFO) ?*c.SNDFILE {
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var file = c.sf_open(path.ptr, mode, fmt);
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const st: i32 = c.sf_error(file);
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if (st != 0) {
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std.debug.warn("Failed to open {} ({})\n", path, c.sf_error_number(st));
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return null;
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}
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return file;
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}
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fn sclose(path: []const u8, file: *c.SNDFILE) void {
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var st: i32 = c.sf_close(file);
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if (st != 0) {
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std.debug.warn(
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"Failed to close {} ({})\n",
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path,
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c.sf_error_number(st),
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);
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}
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}
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///Read a single frame from a file into an interleaved buffer.
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///If more channels are required than are available in the file, the remaining
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///channels are distributed in a round-robin fashion (LRLRL).
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fn sread(file: *c.SNDFILE, file_chans: c_int, buf: []f32) bool {
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const n_read: c.sf_count_t = c.sf_readf_float(file, buf.ptr, 1);
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const buf_chans = @intCast(c_int, buf.len);
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var i = file_chans - 1;
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while (i < buf_chans) : (i += 1) {
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//buf[@intCast(usize, i)] = buf[i % file_chans];
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buf[@intCast(usize, i)] = buf[@intCast(usize, @mod(i, file_chans))];
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}
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return n_read == 1;
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}
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fn print_version() !void {
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const stdout_file = try std.io.getStdOut();
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try stdout_file.write("lv2apply (lilv) 0.24.4\n");
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try stdout_file.write("Copyright 2007-2016 David Robillard <http://drobilla.net>\n");
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try stdout_file.write("Copyright 2019 Luna Mendes <http://l4.pm>\n");
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}
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fn print_usage() !void {
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const stdout_file = try std.io.getStdOut();
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try stdout_file.write("Usage: lv2apply [OPTION]... PLUGIN_URI\n");
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try stdout_file.write(" -i IN_FILE Input file\n");
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try stdout_file.write(" -o OUT_FILE Output file\n");
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try stdout_file.write(" -o OUT_FILE Output file\n");
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try stdout_file.write("-c SYM VAL Control value\n");
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try stdout_file.write("--help print help\n");
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try stdout_file.write("--version display version\n");
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}
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pub fn main() !void {
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std.debug.warn("awoo.\n");
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var arena = std.heap.ArenaAllocator.init(std.heap.c_allocator);
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const allocator = &arena.allocator;
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var in_path: ?[]u8 = null;
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var out_path: ?[]u8 = null;
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var self = LV2Apply{
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.allocator = allocator,
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.n_params = 0,
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.params = ParamList.init(allocator),
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.n_audio_in = 0,
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.n_audio_out = 0,
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.ports = try allocator.alloc(*Port, 0),
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};
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defer self.deinit();
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var args_it = std.process.args();
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_ = args_it.skip();
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var plugin_uri_opt: ?[]u8 = null;
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while (args_it.next(allocator)) |arg_err| {
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var arg = try arg_err;
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if (std.mem.eql(u8, arg, "--version")) {
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try print_version();
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return;
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} else if (std.mem.eql(u8, arg, "--help")) {
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try print_usage();
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return;
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} else if (std.mem.eql(u8, arg, "-i")) {
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in_path = try args_it.next(allocator).?;
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} else if (std.mem.eql(u8, arg, "-o")) {
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out_path = try args_it.next(allocator).?;
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} else if (std.mem.eql(u8, arg, "-c")) {
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var param_name = try args_it.next(allocator).?;
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var value_arg = try args_it.next(allocator).?;
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var param_value = try std.fmt.parseFloat(f32, value_arg);
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try self.params.append(Param{ .sym = param_name, .value = param_value });
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} else if (arg[0] == '-') {
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try print_usage();
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return;
|
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} else {
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plugin_uri_opt = arg;
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}
|
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}
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|
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if (in_path == null or out_path == null or plugin_uri_opt == null) {
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try print_usage();
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return;
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}
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|
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self.in_path = in_path.?;
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self.out_path = out_path.?;
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var plugin_uri = plugin_uri_opt.?;
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self.world = c.lilv_world_new().?;
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var uri: *c.LilvNode = c.lilv_new_uri(self.world, plugin_uri.ptr) orelse blk: {
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std.debug.warn("Invalid plugin URI <{}>\n", plugin_uri);
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return;
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};
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c.lilv_world_load_all(self.world);
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const plugins: *const c.LilvPlugins = c.lilv_world_get_all_plugins(self.world);
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const plugin_opt = c.lilv_plugins_get_by_uri(plugins, uri);
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c.lilv_node_free(uri);
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if (plugin_opt) |plugin| {
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self.plugin = plugin;
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} else {
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std.debug.warn("Plugin <{}> not found\n", plugin_uri);
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return;
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}
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var in_fmt = c.SF_INFO{
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.frames = c_int(0),
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.samplerate = c_int(44100),
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.channels = c_int(1),
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.format = c.SF_FORMAT_ULAW | c.SF_FORMAT_RAW | c.SF_ENDIAN_BIG,
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.sections = c_int(0),
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.seekable = c_int(0),
|
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};
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var in_file_opt = sopen(self.in_path, c.SFM_READ, &in_fmt);
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if (in_file_opt) |in_file| {
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self.in_file = in_file;
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} else {
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||||
std.debug.warn("Failed to call sopen().\n");
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return;
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}
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_ = try self.createPorts();
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if (self.n_audio_in == 0 or
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(in_fmt.channels != @intCast(c_int, self.n_audio_in) and in_fmt.channels != 1))
|
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{
|
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std.debug.warn("unable to map {} inputs to {} ports\n", in_fmt.channels, self.n_audio_in);
|
||||
}
|
||||
|
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var it = self.params.iterator();
|
||||
|
||||
while (it.next()) |param| {
|
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var sym = c.lilv_new_string(self.world, param.sym.ptr);
|
||||
const port = c.lilv_plugin_get_port_by_symbol(self.plugin, sym);
|
||||
c.lilv_node_free(sym);
|
||||
|
||||
std.debug.warn("param control: set {} to {}\n", param.sym, param.value);
|
||||
|
||||
self.ports[c.lilv_port_get_index(self.plugin, port)].value = param.value;
|
||||
}
|
||||
|
||||
var out_fmt = c.SF_INFO{
|
||||
.frames = c_int(0),
|
||||
.samplerate = c_int(44100),
|
||||
.channels = @intCast(c_int, self.n_audio_out),
|
||||
.format = c.SF_FORMAT_ULAW | c.SF_FORMAT_RAW,
|
||||
.sections = c_int(0),
|
||||
.seekable = c_int(0),
|
||||
};
|
||||
|
||||
var out_file_opt = sopen(self.out_path, c.SFM_WRITE, &out_fmt);
|
||||
if (out_file_opt) |out_file| {
|
||||
self.out_file = out_file;
|
||||
} else {
|
||||
std.debug.warn("Failed to call sopen() for outfile.\n");
|
||||
return;
|
||||
}
|
||||
|
||||
const n_ports: u32 = c.lilv_plugin_get_num_ports(self.plugin);
|
||||
|
||||
var in_buf = try self.allocator.alloc(f32, self.n_audio_in);
|
||||
var out_buf = try self.allocator.alloc(f32, self.n_audio_out);
|
||||
|
||||
var instance_opt = c.lilv_plugin_instantiate(
|
||||
self.plugin,
|
||||
@intToFloat(f64, in_fmt.samplerate),
|
||||
null,
|
||||
);
|
||||
|
||||
if (instance_opt) |instance| {
|
||||
self.instance = instance;
|
||||
} else {
|
||||
std.debug.warn("failed to instantiate\n");
|
||||
return;
|
||||
}
|
||||
|
||||
var i: u32 = 0;
|
||||
var o: u32 = 0;
|
||||
|
||||
for (self.ports) |port, p_idx| {
|
||||
var ptype = port.ptype;
|
||||
var p = @intCast(u32, p_idx);
|
||||
|
||||
if (ptype == .Control) {
|
||||
c.lilv_instance_connect_port(self.instance, p, &port.value);
|
||||
} else if (ptype == .Audio) {
|
||||
if (port.is_input) {
|
||||
c.lilv_instance_connect_port(self.instance, p, &in_buf[i]);
|
||||
i += 1;
|
||||
} else {
|
||||
c.lilv_instance_connect_port(self.instance, p, &in_buf[o]);
|
||||
o += 1;
|
||||
}
|
||||
} else {
|
||||
c.lilv_instance_connect_port(self.instance, p, null);
|
||||
}
|
||||
}
|
||||
|
||||
// Ports are now connected to buffers in interleaved format, so we can run
|
||||
// a single frame at a time and avoid having to interleave buffers to
|
||||
// read/write from/to sndfile.
|
||||
std.debug.warn("almost there!\n");
|
||||
|
||||
c.lilv_instance_activate(self.instance);
|
||||
|
||||
const START = 2 * 44100;
|
||||
// for the first START frames, copy from in to out
|
||||
|
||||
i = 0;
|
||||
while (i < START) : (i += 1) {
|
||||
_ = sread(self.in_file, in_fmt.channels, in_buf);
|
||||
_ = c.sf_writef_float(self.out_file, in_buf.ptr, 1);
|
||||
}
|
||||
|
||||
// seek to START then run plugin over the rest
|
||||
var seeked = c.sf_seek(self.in_file, START, c.SEEK_SET);
|
||||
std.debug.warn("{} seeked frames\n", seeked);
|
||||
|
||||
while (sread(self.in_file, in_fmt.channels, in_buf)) {
|
||||
c.lilv_instance_run(self.instance, 1);
|
||||
if (c.sf_writef_float(self.out_file, out_buf.ptr, 1) != 1) {
|
||||
std.debug.warn("failed to write to output file\n");
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
c.lilv_instance_deactivate(self.instance);
|
||||
return;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue