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import * as uci from 'uci';
import { pipeline_build, source_build, raw_caps_build, processors_build,
encoding_build, sender_build, receiver_build, stream_resolve } from './model.uc';
function section_find(config, type, key) {
return filter(values(config), s => s['.type'] == type && s.path == key)[0];
}
function section_add(cursor, config, prefix, type, options) {
let index = 0;
while (config[prefix + index])
index++;
let name = prefix + index;
if (!cursor.set('gst-rtsp', name, type))
die('Cannot add configuration section\n');
config[name] = { '.name': name, '.type': type, ...options };
for (let option, value in options)
if (!cursor.set('gst-rtsp', name, option, value))
die(`Cannot set ${name}.${option}\n`);
return config[name];
}
function links_add(cursor, section, option, values) {
let existing = section[option] ?? [];
if (type(existing) != 'array')
existing = [existing];
for (let value in values) {
if (index(existing, value) >= 0)
continue;
if (!cursor.list_append('gst-rtsp', section['.name'], option, value))
die(`Cannot add ${section['.name']}.${option}\n`);
push(existing, value);
}
section[option] = existing;
}
export function config_update(cursor, inventory) {
if (!cursor.load('gst-rtsp'))
die('Cannot load gst-rtsp configuration\n');
let config = cursor.get_all('gst-rtsp'), devices = {};
for (let key, device in inventory.devices) {
let section = section_find(config, 'video-device', key);
if (!section)
section = section_add(cursor, config, 'device', 'video-device', {
path: key, entity: device.entity, role: device.role, handled: '1' });
devices[key] = section;
links_add(cursor, section, 'capture_format', device.capture ?? []);
links_add(cursor, section, 'output_format', device.output ?? []);
}
for (let key, device in inventory.devices) {
let upstream = map(device.upstream, k => devices[k]?.['.name']);
links_add(cursor, devices[key], 'upstream', filter(upstream, s => s != null));
}
for (let camera in inventory.cameras) {
let section = section_find(config, 'camera', camera.key);
if (!section) {
let options = { path: camera.key, source: camera.source };
for (let role in ['capture', 'sensor'])
if (camera[role])
options[role] = devices[camera[role]]['.name'];
section = section_add(cursor, config, 'camera', 'camera', options);
}
links_add(cursor, section, 'devices', map(camera.devices, k => devices[k]['.name']));
if (camera.id && section.id == null) {
if (!cursor.set('gst-rtsp', section['.name'], 'id', camera.id))
die('Cannot store camera ID\n');
}
if (section.configured != null)
continue;
let used = map(filter(values(config), s => s['.type'] == 'stream'), s => int(s.port));
let port = 8554;
while (index(used, port) >= 0 && port <= 65535)
port++;
if (port > 65535)
die('No unused stream port\n');
let input = section_add(cursor, config, 'input', 'input', {
camera: section['.name'], enabled: '0', width: '0', height: '0',
framerate: 'auto', pixel_format: 'auto',
io_mode: camera.source == 'v4l2src' ? 'dmabuf' : 'auto' });
section_add(cursor, config, 'stream', 'stream', {
input: input['.name'], enabled: '0', port: '' + port, mount: '/test',
codec: 'auto', resolution: 'native', framerate: 'auto', bitrate: '0',
bitrate_mode: 'cbr', quality: 'high', jpeg_quality: 'auto',
profile: 'auto', keyframe_interval: '0', pixel_format: 'auto',
colourimetry: 'auto', output_io_mode: 'dmabuf-import',
repeat_headers: 'auto', encoder: 'auto' });
if (!cursor.set('gst-rtsp', section['.name'], 'configured', '1'))
die('Cannot mark camera as configured\n');
section.configured = '1';
}
let changed = length(cursor.changes('gst-rtsp')['gst-rtsp'] ?? []) > 0;
if (changed && !cursor.commit('gst-rtsp'))
die('Cannot commit gst-rtsp configuration\n');
return changed;
};
export function devices_resolve(cursor, options) {
for (let name in ['capture', 'encoder_device'])
if (options[name])
options[name] = cursor.get('gst-rtsp', options[name], 'path') ??
die(`Unknown ${name} device\n`);
if (options.processor) {
let processors = type(options.processor) == 'array' ?
options.processor : [options.processor];
options.processor = map(processors, p => cursor.get('gst-rtsp', p, 'path') ??
die('Unknown processor device\n'));
}
return options;
};
function stream_get(cursor, section) {
let stream = cursor.get_all('gst-rtsp', section);
if (!stream || stream['.type'] != 'stream')
die('Unknown stream\n');
let input = stream.input ? cursor.get_all('gst-rtsp', stream.input) : null;
if (stream.input && (!input || input['.type'] != 'input'))
die('Unknown capture input\n');
let camera_name = input?.camera ?? stream.camera;
let camera = camera_name ? cursor.get_all('gst-rtsp', camera_name) : null;
if (camera_name && (!camera || camera['.type'] != 'camera'))
die('Unknown camera\n');
if (camera)
devices_resolve(cursor, camera);
devices_resolve(cursor, stream);
return { stream, camera, input };
}
export function stream_pipeline(cursor, section, state) {
let entry = stream_get(cursor, section);
if (!entry.input || entry.stream.pipeline)
return pipeline_build(entry.stream, entry.camera, state);
if (entry.input.enabled != '1')
die('Capture input is disabled\n');
return receiver_build(stream_resolve(entry.stream, entry.input, entry.camera, state));
};
export function camera_pipeline(cursor, section, state) {
let camera = cursor.get_all('gst-rtsp', section);
if (!camera || camera['.type'] != 'camera')
die('Unknown camera\n');
/*
* A raw pipeline override: the camera section carries the whole
* capture pipeline (source, branches, the unixfdsink senders).
* The stream sections then carry only their receivers, e.g. to
* mix sources, insert software elements, or scale, which the
* automatic build cannot express.
*/
if (camera.pipeline)
return camera.pipeline;
devices_resolve(cursor, camera);
let streams = [];
cursor.foreach('gst-rtsp', 'stream', function(stream) {
if (stream.enabled != '1' || stream.pipeline || !stream.input)
return;
if (cursor.get('gst-rtsp', stream.input, 'camera') == section)
push(streams, stream['.name']);
});
if (!length(streams))
return '';
let pipeline = [], inputs = {}, pad = 0;
if (camera.source == 'libcamerasrc')
push(pipeline, source_build({}, camera, state) + ' name=camera');
for (let name in streams) {
let entry = stream_get(cursor, name);
if (entry.input.enabled != '1')
die('Capture input is disabled\n');
if (entry.stream.source || entry.stream.capture || entry.stream.source_properties)
die('Stream source settings belong to its capture input\n');
let input = devices_resolve(cursor, { ...entry.input });
let stream = stream_resolve(entry.stream, input, camera, state);
let source;
if (camera.source == 'libcamerasrc') {
if (input.source || input.capture || input.source_properties)
die('Libcamera owns capture and ISP output selection\n');
for (let key in ['width', 'height', 'framerate', 'pixel_format', 'colourimetry'])
if (!stream[key] || stream[key] == '0' || stream[key] == 'auto')
stream[key] = input[key];
let processing = processors_build(input, state) + processors_build(stream, state);
let caps = raw_caps_build(stream);
let key = processing + ' ! ' + caps;
if (!inputs[key]) {
let id = 'capture_' + pad;
let output = pad == 0 ? 'camera.src' : 'camera.src_' + (pad - 1);
push(pipeline, output + processing + ' ! ' + caps + ' ! tee name=' + id);
inputs[key] = id;
pad++;
}
source = inputs[key] + '.';
} else {
let id = entry.stream.input;
if (!match(id, /^[a-zA-Z0-9_]+$/))
die('Invalid input section name\n');
if (!inputs[id]) {
if (camera.source == 'v4l2src' && input.io_mode != 'dmabuf')
die('V4L2 capture requires DMABUF export\n');
push(pipeline, source_build(input, camera, state) + ' ! ' +
raw_caps_build(input) + ' ! tee name=' + id);
inputs[id] = true;
}
source = id + '.';
source += processors_build(stream, state);
}
push(pipeline, source + ' ! ' + encoding_build(stream, state) + ' ! ' +
sender_build(stream));
}
return join(' ', pipeline);
};
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