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Add the video portion of @mediabunny/server

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Vanilagy
2026-05-05 23:38:14 +02:00
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packages/server/LICENSE
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Mozilla Public License Version 2.0
==================================
1. Definitions
--------------
1.1. "Contributor"
means each individual or legal entity that creates, contributes to
the creation of, or owns Covered Software.
1.2. "Contributor Version"
means the combination of the Contributions of others (if any) used
by a Contributor and that particular Contributor's Contribution.
1.3. "Contribution"
means Covered Software of a particular Contributor.
1.4. "Covered Software"
means Source Code Form to which the initial Contributor has attached
the notice in Exhibit A, the Executable Form of such Source Code
Form, and Modifications of such Source Code Form, in each case
including portions thereof.
1.5. "Incompatible With Secondary Licenses"
means
(a) that the initial Contributor has attached the notice described
in Exhibit B to the Covered Software; or
(b) that the Covered Software was made available under the terms of
version 1.1 or earlier of the License, but not also under the
terms of a Secondary License.
1.6. "Executable Form"
means any form of the work other than Source Code Form.
1.7. "Larger Work"
means a work that combines Covered Software with other material, in
a separate file or files, that is not Covered Software.
1.8. "License"
means this document.
1.9. "Licensable"
means having the right to grant, to the maximum extent possible,
whether at the time of the initial grant or subsequently, any and
all of the rights conveyed by this License.
1.10. "Modifications"
means any of the following:
(a) any file in Source Code Form that results from an addition to,
deletion from, or modification of the contents of Covered
Software; or
(b) any new file in Source Code Form that contains any Covered
Software.
1.11. "Patent Claims" of a Contributor
means any patent claim(s), including without limitation, method,
process, and apparatus claims, in any patent Licensable by such
Contributor that would be infringed, but for the grant of the
License, by the making, using, selling, offering for sale, having
made, import, or transfer of either its Contributions or its
Contributor Version.
1.12. "Secondary License"
means either the GNU General Public License, Version 2.0, the GNU
Lesser General Public License, Version 2.1, the GNU Affero General
Public License, Version 3.0, or any later versions of those
licenses.
1.13. "Source Code Form"
means the form of the work preferred for making modifications.
1.14. "You" (or "Your")
means an individual or a legal entity exercising rights under this
License. For legal entities, "You" includes any entity that
controls, is controlled by, or is under common control with You. For
purposes of this definition, "control" means (a) the power, direct
or indirect, to cause the direction or management of such entity,
whether by contract or otherwise, or (b) ownership of more than
fifty percent (50%) of the outstanding shares or beneficial
ownership of such entity.
2. License Grants and Conditions
--------------------------------
2.1. Grants
Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
(a) under intellectual property rights (other than patent or trademark)
Licensable by such Contributor to use, reproduce, make available,
modify, display, perform, distribute, and otherwise exploit its
Contributions, either on an unmodified basis, with Modifications, or
as part of a Larger Work; and
(b) under Patent Claims of such Contributor to make, use, sell, offer
for sale, have made, import, and otherwise transfer either its
Contributions or its Contributor Version.
2.2. Effective Date
The licenses granted in Section 2.1 with respect to any Contribution
become effective for each Contribution on the date the Contributor first
distributes such Contribution.
2.3. Limitations on Grant Scope
The licenses granted in this Section 2 are the only rights granted under
this License. No additional rights or licenses will be implied from the
distribution or licensing of Covered Software under this License.
Notwithstanding Section 2.1(b) above, no patent license is granted by a
Contributor:
(a) for any code that a Contributor has removed from Covered Software;
or
(b) for infringements caused by: (i) Your and any other third party's
modifications of Covered Software, or (ii) the combination of its
Contributions with other software (except as part of its Contributor
Version); or
(c) under Patent Claims infringed by Covered Software in the absence of
its Contributions.
This License does not grant any rights in the trademarks, service marks,
or logos of any Contributor (except as may be necessary to comply with
the notice requirements in Section 3.4).
2.4. Subsequent Licenses
No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this
License (see Section 10.2) or under the terms of a Secondary License (if
permitted under the terms of Section 3.3).
2.5. Representation
Each Contributor represents that the Contributor believes its
Contributions are its original creation(s) or it has sufficient rights
to grant the rights to its Contributions conveyed by this License.
2.6. Fair Use
This License is not intended to limit any rights You have under
applicable copyright doctrines of fair use, fair dealing, or other
equivalents.
2.7. Conditions
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
in Section 2.1.
3. Responsibilities
-------------------
3.1. Distribution of Source Form
All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under
the terms of this License. You must inform recipients that the Source
Code Form of the Covered Software is governed by the terms of this
License, and how they can obtain a copy of this License. You may not
attempt to alter or restrict the recipients' rights in the Source Code
Form.
3.2. Distribution of Executable Form
If You distribute Covered Software in Executable Form then:
(a) such Covered Software must also be made available in Source Code
Form, as described in Section 3.1, and You must inform recipients of
the Executable Form how they can obtain a copy of such Source Code
Form by reasonable means in a timely manner, at a charge no more
than the cost of distribution to the recipient; and
(b) You may distribute such Executable Form under the terms of this
License, or sublicense it under different terms, provided that the
license for the Executable Form does not attempt to limit or alter
the recipients' rights in the Source Code Form under this License.
3.3. Distribution of a Larger Work
You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for
the Covered Software. If the Larger Work is a combination of Covered
Software with a work governed by one or more Secondary Licenses, and the
Covered Software is not Incompatible With Secondary Licenses, this
License permits You to additionally distribute such Covered Software
under the terms of such Secondary License(s), so that the recipient of
the Larger Work may, at their option, further distribute the Covered
Software under the terms of either this License or such Secondary
License(s).
3.4. Notices
You may not remove or alter the substance of any license notices
(including copyright notices, patent notices, disclaimers of warranty,
or limitations of liability) contained within the Source Code Form of
the Covered Software, except that You may alter any license notices to
the extent required to remedy known factual inaccuracies.
3.5. Application of Additional Terms
You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on
behalf of any Contributor. You must make it absolutely clear that any
such warranty, support, indemnity, or liability obligation is offered by
You alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.
4. Inability to Comply Due to Statute or Regulation
---------------------------------------------------
If it is impossible for You to comply with any of the terms of this
License with respect to some or all of the Covered Software due to
statute, judicial order, or regulation then You must: (a) comply with
the terms of this License to the maximum extent possible; and (b)
describe the limitations and the code they affect. Such description must
be placed in a text file included with all distributions of the Covered
Software under this License. Except to the extent prohibited by statute
or regulation, such description must be sufficiently detailed for a
recipient of ordinary skill to be able to understand it.
5. Termination
--------------
5.1. The rights granted under this License will terminate automatically
if You fail to comply with any of its terms. However, if You become
compliant, then the rights granted under this License from a particular
Contributor are reinstated (a) provisionally, unless and until such
Contributor explicitly and finally terminates Your grants, and (b) on an
ongoing basis, if such Contributor fails to notify You of the
non-compliance by some reasonable means prior to 60 days after You have
come back into compliance. Moreover, Your grants from a particular
Contributor are reinstated on an ongoing basis if such Contributor
notifies You of the non-compliance by some reasonable means, this is the
first time You have received notice of non-compliance with this License
from such Contributor, and You become compliant prior to 30 days after
Your receipt of the notice.
5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions,
counter-claims, and cross-claims) alleging that a Contributor Version
directly or indirectly infringes any patent, then the rights granted to
You by any and all Contributors for the Covered Software under Section
2.1 of this License shall terminate.
5.3. In the event of termination under Sections 5.1 or 5.2 above, all
end user license agreements (excluding distributors and resellers) which
have been validly granted by You or Your distributors under this License
prior to termination shall survive termination.
************************************************************************
* *
* 6. Disclaimer of Warranty *
* ------------------------- *
* *
* Covered Software is provided under this License on an "as is" *
* basis, without warranty of any kind, either expressed, implied, or *
* statutory, including, without limitation, warranties that the *
* Covered Software is free of defects, merchantable, fit for a *
* particular purpose or non-infringing. The entire risk as to the *
* quality and performance of the Covered Software is with You. *
* Should any Covered Software prove defective in any respect, You *
* (not any Contributor) assume the cost of any necessary servicing, *
* repair, or correction. This disclaimer of warranty constitutes an *
* essential part of this License. No use of any Covered Software is *
* authorized under this License except under this disclaimer. *
* *
************************************************************************
************************************************************************
* *
* 7. Limitation of Liability *
* -------------------------- *
* *
* Under no circumstances and under no legal theory, whether tort *
* (including negligence), contract, or otherwise, shall any *
* Contributor, or anyone who distributes Covered Software as *
* permitted above, be liable to You for any direct, indirect, *
* special, incidental, or consequential damages of any character *
* including, without limitation, damages for lost profits, loss of *
* goodwill, work stoppage, computer failure or malfunction, or any *
* and all other commercial damages or losses, even if such party *
* shall have been informed of the possibility of such damages. This *
* limitation of liability shall not apply to liability for death or *
* personal injury resulting from such party's negligence to the *
* extent applicable law prohibits such limitation. Some *
* jurisdictions do not allow the exclusion or limitation of *
* incidental or consequential damages, so this exclusion and *
* limitation may not apply to You. *
* *
************************************************************************
8. Litigation
-------------
Any litigation relating to this License may be brought only in the
courts of a jurisdiction where the defendant maintains its principal
place of business and such litigation shall be governed by laws of that
jurisdiction, without reference to its conflict-of-law provisions.
Nothing in this Section shall prevent a party's ability to bring
cross-claims or counter-claims.
9. Miscellaneous
----------------
This License represents the complete agreement concerning the subject
matter hereof. If any provision of this License is held to be
unenforceable, such provision shall be reformed only to the extent
necessary to make it enforceable. Any law or regulation which provides
that the language of a contract shall be construed against the drafter
shall not be used to construe this License against a Contributor.
10. Versions of the License
---------------------------
10.1. New Versions
Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.
10.2. Effect of New Versions
You may distribute the Covered Software under the terms of the version
of the License under which You originally received the Covered Software,
or under the terms of any subsequent version published by the license
steward.
10.3. Modified Versions
If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a
modified version of this License if you rename the license and remove
any references to the name of the license steward (except to note that
such modified license differs from this License).
10.4. Distributing Source Code Form that is Incompatible With Secondary
Licenses
If You choose to distribute Source Code Form that is Incompatible With
Secondary Licenses under the terms of this version of the License, the
notice described in Exhibit B of this License must be attached.
Exhibit A - Source Code Form License Notice
-------------------------------------------
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at https://mozilla.org/MPL/2.0/.
If it is not possible or desirable to put the notice in a particular
file, then You may include the notice in a location (such as a LICENSE
file in a relevant directory) where a recipient would be likely to look
for such a notice.
You may add additional accurate notices of copyright ownership.
Exhibit B - "Incompatible With Secondary Licenses" Notice
---------------------------------------------------------
This Source Code Form is "Incompatible With Secondary Licenses", as
defined by the Mozilla Public License, v. 2.0.
packages/server/README.md
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todo
packages/server/api-extractor.json
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{
"$schema": "https://developer.microsoft.com/json-schemas/api-extractor/v7/api-extractor.schema.json",
"mainEntryPointFilePath": "dist/modules/src/index.d.ts",
"bundledPackages": [],
"compiler": {},
"apiReport": {
"enabled": false
},
"docModel": {
"enabled": false
},
"dtsRollup": {
"enabled": true,
"untrimmedFilePath": "dist/mediabunny-flac-encoder.d.ts"
},
"tsdocMetadata": {
"enabled": false
},
"messages": {
"compilerMessageReporting": {
"default": {
"logLevel": "warning"
}
},
"extractorMessageReporting": {
"default": {
"logLevel": "warning"
}
},
"tsdocMessageReporting": {
"default": {
"logLevel": "warning"
}
}
},
"newlineKind": "lf"
}
packages/server/package.json
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{
"name": "@mediabunny/server",
"author": "Vanilagy",
"version": "1.43.1",
"description": "FLAC encoder extension for Mediabunny, based on libFLAC.",
"main": "./dist/bundles/mediabunny-server.cjs",
"module": "./dist/bundles/mediabunny-server.mjs",
"types": "./dist/modules/src/index.d.ts",
"exports": {
"types": "./dist/modules/src/index.d.ts",
"import": "./dist/bundles/mediabunny-server.mjs",
"require": "./dist/bundles/mediabunny-server.cjs"
},
"files": [
"README.md",
"package.json",
"LICENSE",
"dist",
"src"
],
"browser": {
"worker_threads": false
},
"sideEffects": false,
"license": "MPL-2.0",
"repository": {
"type": "git",
"url": "git+https://github.com/Vanilagy/mediabunny.git",
"directory": "packages/server"
},
"bugs": {
"url": "https://github.com/Vanilagy/mediabunny/issues"
},
"homepage": "https://mediabunny.dev/guide/extensions/server",
"funding": {
"type": "individual",
"url": "https://github.com/sponsors/Vanilagy"
},
"dependencies": {
"node-av": "^5.2.3"
},
"peerDependencies": {
"mediabunny": "^1.0.0"
},
"keywords": [
"flac",
"encoding",
"codec",
"mediabunny",
"lossless",
"browser",
"wasm"
]
}
packages/server/src/index.ts
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import { registerDecoder, registerEncoder } from 'mediabunny';
import { NodeAvVideoDecoder } from './video-decoder';
import * as NodeAv from 'node-av';
import { NodeAvVideoEncoder } from './video-encoder';
const SERVER_LOADED_SYMBOL = Symbol.for('@mediabunny/server loaded');
if ((globalThis as Record<symbol, unknown>)[SERVER_LOADED_SYMBOL]) {
console.error(
'[WARNING]\n@mediabunny/server was loaded twice.'
+ ' This will likely cause the package not to work correctly.'
+ ' Check if multiple dependencies are importing different versions of @mediabunny/server,'
+ ' or if something is being bundled incorrectly.',
);
}
(globalThis as Record<symbol, unknown>)[SERVER_LOADED_SYMBOL] = true;
let registered = false;
export const registerMediabunnyServer = () => {
if (registered) {
return;
}
registered = true;
NodeAv.Log.setLevel(NodeAv.AV_LOG_ERROR);
registerDecoder(NodeAvVideoDecoder);
registerEncoder(NodeAvVideoEncoder);
};
packages/server/src/misc.ts
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import { VideoSamplePixelFormat, VideoCodec } from 'mediabunny';
import * as NodeAv from 'node-av';
export const CODEC_TO_CODEC_ID: Record<VideoCodec, NodeAv.AVCodecID> = {
avc: NodeAv.AV_CODEC_ID_H264,
hevc: NodeAv.AV_CODEC_ID_HEVC,
vp8: NodeAv.AV_CODEC_ID_VP8,
vp9: NodeAv.AV_CODEC_ID_VP9,
av1: NodeAv.AV_CODEC_ID_AV1,
};
let cachedHardwareContext: NodeAv.HardwareContext | null | undefined = undefined;
export const getHardwareContext = (): NodeAv.HardwareContext | null => {
if (cachedHardwareContext === undefined) {
cachedHardwareContext = NodeAv.HardwareContext.auto();
}
return cachedHardwareContext;
};
const hardwareDecoderCodecCache = new Map<NodeAv.AVCodecID, NodeAv.Codec | null>();
export const getHardwareDecoderCodec = (codecId: NodeAv.AVCodecID): NodeAv.Codec | null => {
if (!hardwareDecoderCodecCache.has(codecId)) {
const hw = getHardwareContext();
hardwareDecoderCodecCache.set(codecId, hw?.getDecoderCodec(codecId) ?? null);
}
return hardwareDecoderCodecCache.get(codecId)!;
};
const hardwareEncoderCodecCache = new Map<NodeAv.AVCodecID, NodeAv.Codec | null>();
export const getHardwareEncoderCodec = (codecId: NodeAv.AVCodecID): NodeAv.Codec | null => {
if (!hardwareEncoderCodecCache.has(codecId)) {
const hw = getHardwareContext();
hardwareEncoderCodecCache.set(codecId, hw?.getEncoderCodec(codecId) ?? null);
}
return hardwareEncoderCodecCache.get(codecId)!;
};
export const mapColorPrimaries = (primaries: string) => {
switch (primaries) {
case 'bt709': return NodeAv.AVCOL_PRI_BT709;
case 'bt470bg': return NodeAv.AVCOL_PRI_BT470BG;
case 'smpte170m': return NodeAv.AVCOL_PRI_SMPTE170M;
case 'bt2020': return NodeAv.AVCOL_PRI_BT2020;
case 'smpte432': return NodeAv.AVCOL_PRI_SMPTE432;
}
return null;
};
export const unmapColorPrimaries = (primaries: number) => {
switch (primaries) {
case NodeAv.AVCOL_PRI_BT709: return 'bt709';
case NodeAv.AVCOL_PRI_BT470BG: return 'bt470bg';
case NodeAv.AVCOL_PRI_SMPTE170M: return 'smpte170m';
case NodeAv.AVCOL_PRI_BT2020: return 'bt2020';
case NodeAv.AVCOL_PRI_SMPTE432: return 'smpte432';
}
return null;
};
export const mapTransferCharacteristics = (transfer: string) => {
switch (transfer) {
case 'bt709': return NodeAv.AVCOL_TRC_BT709;
case 'smpte170m': return NodeAv.AVCOL_TRC_SMPTE170M;
case 'iec61966-2-1': return NodeAv.AVCOL_TRC_IEC61966_2_1;
case 'linear': return NodeAv.AVCOL_TRC_LINEAR;
case 'pq': return NodeAv.AVCOL_TRC_SMPTE2084;
case 'hlg': return NodeAv.AVCOL_TRC_ARIB_STD_B67;
}
return null;
};
export const unmapTransferCharacteristics = (transfer: number) => {
switch (transfer) {
case NodeAv.AVCOL_TRC_BT709: return 'bt709';
case NodeAv.AVCOL_TRC_SMPTE170M: return 'smpte170m';
case NodeAv.AVCOL_TRC_IEC61966_2_1: return 'iec61966-2-1';
case NodeAv.AVCOL_TRC_LINEAR: return 'linear';
case NodeAv.AVCOL_TRC_SMPTE2084: return 'pq';
case NodeAv.AVCOL_TRC_ARIB_STD_B67: return 'hlg';
}
return null;
};
export const mapMatrixCoefficients = (matrix: string) => {
switch (matrix) {
case 'rgb': return NodeAv.AVCOL_SPC_RGB;
case 'bt709': return NodeAv.AVCOL_SPC_BT709;
case 'bt470bg': return NodeAv.AVCOL_SPC_BT470BG;
case 'smpte170m': return NodeAv.AVCOL_SPC_SMPTE170M;
case 'bt2020-ncl': return NodeAv.AVCOL_SPC_BT2020_NCL;
}
return null;
};
export const unmapMatrixCoefficients = (matrix: number) => {
switch (matrix) {
case NodeAv.AVCOL_SPC_RGB: return 'rgb';
case NodeAv.AVCOL_SPC_BT709: return 'bt709';
case NodeAv.AVCOL_SPC_BT470BG: return 'bt470bg';
case NodeAv.AVCOL_SPC_SMPTE170M: return 'smpte170m';
case NodeAv.AVCOL_SPC_BT2020_NCL: return 'bt2020-ncl';
}
return null;
};
export const toPixelFormat = (ffmpegPixelFormat: NodeAv.AVPixelFormat): VideoSamplePixelFormat | null => {
switch (ffmpegPixelFormat) {
case NodeAv.AV_PIX_FMT_YUV420P: return 'I420';
// "deprecated in favor of AV_PIX_FMT_YUV420P and setting color_range"
case NodeAv.AV_PIX_FMT_YUVJ420P: return 'I420';
case NodeAv.AV_PIX_FMT_YUV420P10LE: return 'I420P10';
case NodeAv.AV_PIX_FMT_YUV420P12LE: return 'I420P12';
case NodeAv.AV_PIX_FMT_YUVA420P: return 'I420A';
case NodeAv.AV_PIX_FMT_YUVA420P10LE: return 'I420AP10';
case NodeAv.AV_PIX_FMT_YUV422P: return 'I422';
// "deprecated in favor of AV_PIX_FMT_YUV422P and setting color_range"
case NodeAv.AV_PIX_FMT_YUVJ422P: return 'I422';
case NodeAv.AV_PIX_FMT_YUV422P10LE: return 'I422P10';
case NodeAv.AV_PIX_FMT_YUV422P12LE: return 'I422P12';
case NodeAv.AV_PIX_FMT_YUVA422P: return 'I422A';
case NodeAv.AV_PIX_FMT_YUVA422P10LE: return 'I422AP10';
case NodeAv.AV_PIX_FMT_YUVA422P12LE: return 'I422AP12';
case NodeAv.AV_PIX_FMT_YUV444P: return 'I444';
// "deprecated in favor of AV_PIX_FMT_YUV444P and setting color_range"
case NodeAv.AV_PIX_FMT_YUVJ444P: return 'I444';
case NodeAv.AV_PIX_FMT_YUV444P10LE: return 'I444P10';
case NodeAv.AV_PIX_FMT_YUV444P12LE: return 'I444P12';
case NodeAv.AV_PIX_FMT_YUVA444P: return 'I444A';
case NodeAv.AV_PIX_FMT_YUVA444P10LE: return 'I444AP10';
case NodeAv.AV_PIX_FMT_YUVA444P12LE: return 'I444AP12';
case NodeAv.AV_PIX_FMT_NV12: return 'NV12';
case NodeAv.AV_PIX_FMT_RGBA: return 'RGBA';
case NodeAv.AV_PIX_FMT_RGB0: return 'RGBX';
case NodeAv.AV_PIX_FMT_BGRA: return 'BGRA';
case NodeAv.AV_PIX_FMT_BGR0: return 'BGRX';
default: return null;
}
};
export const fromPixelFormat = (pixelFormat: VideoSamplePixelFormat) => {
switch (pixelFormat) {
case 'I420': return NodeAv.AV_PIX_FMT_YUV420P;
case 'I420P10': return NodeAv.AV_PIX_FMT_YUV420P10LE;
case 'I420P12': return NodeAv.AV_PIX_FMT_YUV420P12LE;
case 'I420A': return NodeAv.AV_PIX_FMT_YUVA420P;
case 'I420AP10': return NodeAv.AV_PIX_FMT_YUVA420P10LE;
case 'I422': return NodeAv.AV_PIX_FMT_YUV422P;
case 'I422P10': return NodeAv.AV_PIX_FMT_YUV422P10LE;
case 'I422P12': return NodeAv.AV_PIX_FMT_YUV422P12LE;
case 'I422A': return NodeAv.AV_PIX_FMT_YUVA422P;
case 'I422AP10': return NodeAv.AV_PIX_FMT_YUVA422P10LE;
case 'I422AP12': return NodeAv.AV_PIX_FMT_YUVA422P12LE;
case 'I444': return NodeAv.AV_PIX_FMT_YUV444P;
case 'I444P10': return NodeAv.AV_PIX_FMT_YUV444P10LE;
case 'I444P12': return NodeAv.AV_PIX_FMT_YUV444P12LE;
case 'I444A': return NodeAv.AV_PIX_FMT_YUVA444P;
case 'I444AP10': return NodeAv.AV_PIX_FMT_YUVA444P10LE;
case 'I444AP12': return NodeAv.AV_PIX_FMT_YUVA444P12LE;
case 'NV12': return NodeAv.AV_PIX_FMT_NV12;
case 'RGBA': return NodeAv.AV_PIX_FMT_RGBA;
case 'RGBX': return NodeAv.AV_PIX_FMT_RGB0;
case 'BGRA': return NodeAv.AV_PIX_FMT_BGRA;
case 'BGRX': return NodeAv.AV_PIX_FMT_BGR0;
default: return NodeAv.AV_PIX_FMT_NONE;
}
};
packages/server/src/video-decoder.ts
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import { CustomVideoDecoder, VideoCodec, EncodedPacket, VideoSample, MaybePromise, Rational } from 'mediabunny';
import * as NodeAv from 'node-av';
import {
CODEC_TO_CODEC_ID,
getHardwareDecoderCodec,
mapColorPrimaries,
mapMatrixCoefficients,
mapTransferCharacteristics,
} from './misc';
import { binarySearchLessOrEqual, simplifyRational, toUint8Array } from '../../../src/misc';
import { NodeAvFrameVideoSampleResource } from './video-sample';
export class NodeAvVideoDecoder extends CustomVideoDecoder {
frame!: NodeAv.Frame;
packet!: NodeAv.Packet;
codecContext!: NodeAv.CodecContext;
pixelAspectRatio!: Rational;
// Bookkeeping to restore the original timing information
preciseTimings: {
microsecondTimestamp: number;
timestamp: number;
duration: number;
timestampIsValid: boolean;
durationIsValid: boolean;
}[] = [];
// eslint-disable-next-line @typescript-eslint/no-unused-vars
static override supports(codec: VideoCodec, config: VideoDecoderConfig): boolean {
return codec === 'avc' || codec === 'hevc' || codec === 'vp8' || codec === 'vp9' || codec === 'av1';
}
async init() {
this.frame = new NodeAv.Frame();
this.frame.alloc();
this.packet = new NodeAv.Packet();
this.packet.alloc();
const codecId = CODEC_TO_CODEC_ID[this.codec];
let codec: NodeAv.Codec | null;
if (this.config.hardwareAcceleration !== 'prefer-hardware' || this.codec === 'av1') {
// https://github.com/opencv/opencv/issues/24430
codec = NodeAv.Codec.findDecoder(codecId);
} else {
codec = getHardwareDecoderCodec(codecId) ?? NodeAv.Codec.findDecoder(codecId);
}
if (!codec) {
throw new Error(`Unable to obtain libav codec for '${this.codec}'.`);
}
const codecContext = new NodeAv.CodecContext();
codecContext.allocContext3(codec);
this.pixelAspectRatio = simplifyRational({
num: (this.config.displayAspectWidth ?? this.config.codedWidth ?? 0) * (this.config.codedHeight ?? 0),
den: (this.config.displayAspectHeight ?? this.config.codedHeight ?? 0) * (this.config.codedWidth ?? 0) || 1,
});
codecContext.width = this.config.codedWidth ?? 0; // Fucky that the dimensions can be optional, but oh well
codecContext.height = this.config.codedHeight ?? 0;
codecContext.codecType = NodeAv.AVMEDIA_TYPE_VIDEO;
codecContext.codecId = codecId;
codecContext.extraData = this.config.description
? Buffer.from(toUint8Array(this.config.description))
: null;
codecContext.sampleAspectRatio = new NodeAv.Rational(this.pixelAspectRatio.num, this.pixelAspectRatio.den);
if (this.config.colorSpace?.primaries) {
const mapped = mapColorPrimaries(this.config.colorSpace.primaries);
if (mapped !== null) {
codecContext.colorPrimaries = mapped;
}
}
if (this.config.colorSpace?.transfer) {
const mapped = mapTransferCharacteristics(this.config.colorSpace.transfer);
if (mapped !== null) {
codecContext.colorTrc = mapped;
}
}
if (this.config.colorSpace?.matrix) {
const mapped = mapMatrixCoefficients(this.config.colorSpace.matrix);
if (mapped !== null) {
codecContext.colorSpace = mapped;
}
}
if (this.config.colorSpace?.fullRange != null) {
codecContext.colorRange = this.config.colorSpace.fullRange
? NodeAv.AVCOL_RANGE_JPEG
: NodeAv.AVCOL_RANGE_MPEG;
}
const ret = await codecContext.open2();
NodeAv.FFmpegError.throwIfError(ret, 'Open codec context');
this.codecContext = codecContext;
}
async decode(packet: EncodedPacket) {
this.packet.isKeyframe = packet.type === 'key';
this.packet.data = Buffer.from(packet.data);
this.packet.timeBase = { num: 1, den: 1e6 };
this.packet.pts = BigInt(packet.microsecondTimestamp);
this.packet.dts = NodeAv.AV_NOPTS_VALUE;
this.packet.duration = BigInt(packet.microsecondDuration);
const preciseTimingIndex = binarySearchLessOrEqual(
this.preciseTimings,
packet.microsecondTimestamp,
x => x.microsecondTimestamp,
);
const existingEntry = preciseTimingIndex !== -1
? this.preciseTimings[preciseTimingIndex]
: null;
if (existingEntry && existingEntry.microsecondTimestamp === packet.microsecondTimestamp) {
if (existingEntry.timestamp !== packet.timestamp) {
// Mapping isn't unique, can't use the timestamp
existingEntry.timestampIsValid = false;
}
if (existingEntry.duration !== packet.duration) {
// Mapping isn't unique, can't use the duration
existingEntry.durationIsValid = false;
}
} else {
this.preciseTimings.splice(preciseTimingIndex + 1, 0, {
microsecondTimestamp: packet.microsecondTimestamp,
timestamp: packet.timestamp,
duration: packet.duration,
timestampIsValid: true,
durationIsValid: true,
});
// Make sure it doesn't grow indefinitely
if (this.preciseTimings.length > 128) {
this.preciseTimings.shift();
}
}
const ret = await this.codecContext.sendPacket(this.packet);
NodeAv.FFmpegError.throwIfError(ret, 'Send packet');
while (true) {
const receiveRet = await this.codecContext.receiveFrame(this.frame);
if (receiveRet === NodeAv.AVERROR_EAGAIN || receiveRet === NodeAv.AVERROR_EOF) {
break;
}
this.receiveFrame(receiveRet);
}
}
receiveFrame(ret: number) {
NodeAv.FFmpegError.throwIfError(ret, 'Receive frame');
this.frame.sampleAspectRatio = new NodeAv.Rational(this.pixelAspectRatio.num, this.pixelAspectRatio.den);
let timestamp = Number(this.frame.pts) / 1e6;
let duration = Number(this.frame.duration) / 1e6;
const preciseTimingIndex = binarySearchLessOrEqual(
this.preciseTimings,
Number(this.frame.pts),
x => x.microsecondTimestamp,
);
const entry = preciseTimingIndex !== -1
? this.preciseTimings[preciseTimingIndex]
: null;
// If there's a relevant timing entry, refine the frame's timing data to get better accuracy than
// microseconds
if (entry && entry.microsecondTimestamp === Number(this.frame.pts)) {
if (entry.timestampIsValid) {
timestamp = entry.timestamp;
}
if (entry.durationIsValid) {
duration = entry.duration;
}
}
this.onSample(new VideoSample(new NodeAvFrameVideoSampleResource(this.frame), {
timestamp,
duration,
}));
}
async flush() {
// Send null packet to signal flush
const ret = await this.codecContext.sendPacket(null);
NodeAv.FFmpegError.throwIfError(ret, 'Flush decoder');
// Keep receiving frames until no more are available
while (true) {
const receiveRet = await this.codecContext.receiveFrame(this.frame);
if (receiveRet === NodeAv.AVERROR_EAGAIN || receiveRet === NodeAv.AVERROR_EOF) {
// No more frames available
break;
}
this.receiveFrame(receiveRet);
}
this.codecContext.flushBuffers();
}
close(): MaybePromise<void> {
this.codecContext.freeContext();
this.frame.free();
this.packet.free();
}
}
packages/server/src/video-encoder.ts
+563
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import { CustomVideoEncoder, MaybePromise, QUALITY_MEDIUM, VideoCodec, VideoSample, EncodedPacket } from 'mediabunny';
import * as NodeAv from 'node-av';
import {
CODEC_TO_CODEC_ID,
fromPixelFormat,
getHardwareEncoderCodec,
mapColorPrimaries,
mapMatrixCoefficients,
mapTransferCharacteristics,
unmapColorPrimaries,
unmapMatrixCoefficients,
unmapTransferCharacteristics,
} from './misc';
import { NodeAvFrameVideoSampleResource } from './video-sample';
import {
AvcNalUnitType,
extractAv1CodecInfoFromPacket,
extractAvcDecoderConfigurationRecord,
extractHevcDecoderConfigurationRecord,
extractNalUnitTypeForAvc,
extractNalUnitTypeForHevc,
extractVp9CodecInfoFromPacket,
HevcNalUnitType,
iterateNalUnitsInAnnexB,
NalUnitLocation,
serializeAvcDecoderConfigurationRecord,
serializeHevcDecoderConfigurationRecord,
} from '../../../src/codec-data';
import { extractVideoCodecString } from '../../../src/codec';
import { assert, binarySearchLessOrEqual, simplifyRational, toUint8Array } from '../../../src/misc';
export class NodeAvVideoEncoder extends CustomVideoEncoder {
frame!: NodeAv.Frame;
packet!: NodeAv.Packet;
avCodec!: NodeAv.Codec;
codecContext: NodeAv.CodecContext | null = null;
lastBuffer: Buffer | null = null;
colorSpaceSet = false;
packetEmitted = false;
scaler: NodeAv.SoftwareScaleContext | null = null;
lastScalerKey: string | null = null;
dstFrame: NodeAv.Frame | null = null;
// Bookkeeping to restore the original timing information
preciseTimings: {
microsecondTimestamp: number;
timestamp: number;
duration: number;
timestampIsValid: boolean;
durationIsValid: boolean;
}[] = [];
static override supports(codec: VideoCodec, config: VideoEncoderConfig): boolean {
return (codec === 'avc' || codec === 'hevc' || codec === 'vp8' || codec === 'vp9' || codec === 'av1')
&& !(config.alpha === 'keep' || config.bitrateMode === 'quantizer');
}
async init(): Promise<void> {
this.frame = new NodeAv.Frame();
this.frame.alloc();
this.frame.timeBase = new NodeAv.Rational(1, 1e6);
this.packet = new NodeAv.Packet();
this.packet.alloc();
const codecId = CODEC_TO_CODEC_ID[this.codec];
let codec: NodeAv.Codec | null = null;
if (this.config.hardwareAcceleration === 'prefer-software') {
codec = NodeAv.Codec.findEncoder(codecId);
} else {
codec = getHardwareEncoderCodec(codecId) ?? NodeAv.Codec.findEncoder(codecId);
}
if (!codec) {
throw new Error(`Unable to obtain libav codec for '${this.codec}'.`);
}
this.avCodec = codec;
await this.createCodecContext();
}
async createCodecContext() {
assert(this.codecContext === null);
const codecContext = new NodeAv.CodecContext();
codecContext.allocContext3(this.avCodec);
let pixelFormat = NodeAv.AV_PIX_FMT_YUV420P;
if (this.avCodec.pixelFormats && !this.avCodec.pixelFormats.includes(NodeAv.AV_PIX_FMT_YUV420P)) {
pixelFormat = this.avCodec.pixelFormats[0]!;
}
const pixelAspectRatio = simplifyRational({
num: (this.config.displayWidth ?? this.config.width) * this.config.height,
den: (this.config.displayHeight ?? this.config.height) * this.config.width,
});
codecContext.width = this.config.width;
codecContext.height = this.config.height;
codecContext.pixelFormat = pixelFormat;
codecContext.timeBase = new NodeAv.Rational(1, 1e6);
codecContext.gopSize = 60;
codecContext.framerate = new NodeAv.Rational(Math.round(this.config.framerate ?? 0) || 30, 1);
codecContext.bitRate = BigInt(
this.config.bitrate ?? QUALITY_MEDIUM._toVideoBitrate(this.codec, this.config.width, this.config.height),
);
codecContext.sampleAspectRatio = new NodeAv.Rational(pixelAspectRatio.num, pixelAspectRatio.den);
if (this.config.bitrateMode === 'constant') {
codecContext.rcMinRate = codecContext.bitRate;
codecContext.rcMaxRate = codecContext.bitRate;
}
const isRealtime = this.config.latencyMode === 'realtime';
if (this.avCodec.name === 'libx264') {
if (isRealtime) {
codecContext.setOption('tune', 'zerolatency');
codecContext.setOption('preset', 'ultrafast');
}
} else if (this.avCodec.name === 'libx265') {
codecContext.setOption('x265-params', 'log-level=error');
if (isRealtime) {
codecContext.setOption('tune', 'zerolatency');
codecContext.setOption('preset', 'ultrafast');
}
} else if (this.avCodec.name === 'libvpx') {
if (isRealtime) {
codecContext.setOption('deadline', 'realtime');
codecContext.setOption('cpu-used', '8');
} else {
codecContext.setOption('cpu-used', '8');
}
} else if (this.avCodec.name === 'libvpx-vp9') {
codecContext.setOption('deadline', 'realtime');
if (isRealtime) {
codecContext.setOption('cpu-used', '8');
} else {
codecContext.setOption('cpu-used', '5');
}
} else if (this.avCodec.name === 'libsvtav1') {
// SVTAV1 can be silenced by setting an environment variable:
// https://superuser.com/questions/1775236/how-to-remove-svt-av1-information-from-ffmpeg-output
process.env['SVT_LOG'] = '1';
if (isRealtime) {
codecContext.setOption('preset', '12');
}
}
const ret = await codecContext.open2();
NodeAv.FFmpegError.throwIfError(ret, 'Open codec context');
this.codecContext = codecContext;
}
async encode(videoSample: VideoSample, options: VideoEncoderEncodeOptions): Promise<void> {
if (this.codecContext === null) {
await this.createCodecContext();
assert(this.codecContext);
}
const underlyingData = videoSample.getUnderlyingData();
if (underlyingData instanceof NodeAvFrameVideoSampleResource) {
this.frame.ref(underlyingData.frame);
} else {
if (videoSample.format === null) {
throw new Error('Cannot encode foreign VideoSample with unknown (null) format.');
}
// Copy frame data from VideoSample to FFmpeg Frame
this.frame.format = fromPixelFormat(videoSample.format);
this.frame.width = videoSample.codedWidth;
this.frame.height = videoSample.codedHeight;
this.frame.pts = BigInt(videoSample.microsecondTimestamp);
this.frame.duration = BigInt(videoSample.microsecondDuration);
this.frame.colorPrimaries = mapColorPrimaries(videoSample.colorSpace.primaries ?? 'unknown')
?? NodeAv.AVCOL_PRI_UNSPECIFIED;
this.frame.colorSpace = mapMatrixCoefficients(videoSample.colorSpace.matrix ?? 'unknown')
?? NodeAv.AVCOL_SPC_UNSPECIFIED;
this.frame.colorTrc = mapTransferCharacteristics(videoSample.colorSpace.transfer ?? 'unknown')
?? NodeAv.AVCOL_TRC_UNSPECIFIED;
this.frame.colorRange = videoSample.colorSpace.fullRange === false
? NodeAv.AVCOL_RANGE_MPEG
: videoSample.colorSpace.fullRange === true
? NodeAv.AVCOL_RANGE_JPEG
: NodeAv.AVCOL_RANGE_UNSPECIFIED;
this.frame.keyFrame = options?.keyFrame ? 1 : 0;
const size = videoSample.allocationSize();
if (!this.lastBuffer || this.lastBuffer.byteLength !== size) {
this.lastBuffer = Buffer.from({ length: size });
}
await videoSample.copyTo(this.lastBuffer);
this.frame.fromBuffer(this.lastBuffer);
}
if (!this.colorSpaceSet) {
this.codecContext.colorPrimaries = this.frame.colorPrimaries;
this.codecContext.colorTrc = this.frame.colorTrc;
this.codecContext.colorSpace = this.frame.colorSpace;
this.codecContext.colorRange = this.frame.colorRange;
this.colorSpaceSet = true;
}
let frameToEncode = this.frame;
const requiresScaler
= this.codecContext.pixelFormat !== this.frame.format
|| this.codecContext.width !== this.frame.width
|| this.codecContext.height !== this.frame.height;
if (requiresScaler) {
if (!this.scaler) {
this.scaler = new NodeAv.SoftwareScaleContext();
}
const key = `${this.frame.width}x${this.frame.height}:${this.frame.format}`;
const needsConfigure = key !== this.lastScalerKey;
if (needsConfigure) {
this.scaler.getContext(
this.frame.width, this.frame.height, this.frame.format as NodeAv.AVPixelFormat,
this.codecContext.width, this.codecContext.height, this.codecContext.pixelFormat,
NodeAv.SWS_FAST_BILINEAR,
);
this.lastScalerKey = key;
const ret = this.scaler.initContext();
NodeAv.FFmpegError.throwIfError(ret, 'initContext');
}
if (!this.dstFrame) {
this.dstFrame = new NodeAv.Frame();
this.dstFrame.alloc();
this.dstFrame.width = this.codecContext.width;
this.dstFrame.height = this.codecContext.height;
this.dstFrame.format = this.codecContext.pixelFormat;
this.dstFrame.allocBuffer();
}
await this.scaler.scaleFrame(this.dstFrame, this.frame);
this.dstFrame.copyProps(this.frame);
frameToEncode = this.dstFrame;
}
const preciseTimingIndex = binarySearchLessOrEqual(
this.preciseTimings,
videoSample.microsecondTimestamp,
x => x.microsecondTimestamp,
);
const existingEntry = preciseTimingIndex !== -1
? this.preciseTimings[preciseTimingIndex]
: null;
if (existingEntry && existingEntry.microsecondTimestamp === videoSample.microsecondTimestamp) {
if (existingEntry.timestamp !== videoSample.timestamp) {
// Mapping isn't unique, can't use the timestamp
existingEntry.timestampIsValid = false;
}
if (existingEntry.duration !== videoSample.duration) {
// Mapping isn't unique, can't use the duration
existingEntry.durationIsValid = false;
}
} else {
this.preciseTimings.splice(preciseTimingIndex + 1, 0, {
microsecondTimestamp: videoSample.microsecondTimestamp,
timestamp: videoSample.timestamp,
duration: videoSample.duration,
timestampIsValid: true,
durationIsValid: true,
});
// Make sure it doesn't grow indefinitely
if (this.preciseTimings.length > 128) {
this.preciseTimings.shift();
}
}
const ret = await this.codecContext.sendFrame(frameToEncode);
NodeAv.FFmpegError.throwIfError(ret, 'Send frame');
// Keep receiving packets until no more are available for this frame
while (true) {
const receiveRet = await this.codecContext.receivePacket(this.packet);
if (receiveRet === NodeAv.AVERROR_EAGAIN || receiveRet === NodeAv.AVERROR_EOF) {
break;
}
this.receivePacket(ret);
}
}
receivePacket(ret: number) {
assert(this.codecContext);
NodeAv.FFmpegError.throwIfError(ret, 'Receive packet');
if (!this.packet.data) {
return;
}
let packetData = toUint8Array(this.packet.data);
let timestamp = Number(this.packet.pts) / 1e6;
let duration = Number(this.packet.duration) / 1e6;
const preciseTimingIndex = binarySearchLessOrEqual(
this.preciseTimings,
Number(this.packet.pts),
x => x.microsecondTimestamp,
);
const entry = preciseTimingIndex !== -1
? this.preciseTimings[preciseTimingIndex]
: null;
// If there's a relevant timing entry, refine the packet's timing data to get better accuracy than
// microseconds
if (entry && entry.microsecondTimestamp === Number(this.packet.pts)) {
if (entry.timestampIsValid) {
timestamp = entry.timestamp;
}
if (entry.durationIsValid) {
duration = entry.duration;
}
}
const metadata: EncodedVideoChunkMetadata = {};
let decoderConfigCodecString: string | null = null;
let decoderConfigDescription: Uint8Array | null = null;
if (this.codec === 'avc' || this.codec === 'hevc') {
let expectsAnnexB = false;
if (this.codec === 'avc') {
expectsAnnexB = this.config.avc?.format === 'annexb';
} else {
// eslint-disable-next-line @stylistic/max-len
// eslint-disable-next-line @typescript-eslint/no-explicit-any, @typescript-eslint/no-unsafe-member-access
expectsAnnexB = (this.config as any).hevc?.format === 'annexb';
}
if (!this.packetEmitted) {
let serializedRecord: Uint8Array;
if (this.codec === 'avc') {
const record = extractAvcDecoderConfigurationRecord(this.packet.data);
if (!record) {
throw new Error('Invalid AVC data, could not extract decoder configuration record.');
}
serializedRecord = serializeAvcDecoderConfigurationRecord(record);
} else {
const record = extractHevcDecoderConfigurationRecord(this.packet.data);
if (!record) {
throw new Error('Invalid HEVC data, could not extract decoder configuration record.');
}
serializedRecord = serializeHevcDecoderConfigurationRecord(record);
}
decoderConfigCodecString = extractVideoCodecString({
width: this.config.width,
height: this.config.height,
codec: this.codec,
codecDescription: serializedRecord,
colorSpace: null,
avcType: 1,
avcCodecInfo: null,
hevcCodecInfo: null,
vp9CodecInfo: null,
av1CodecInfo: null,
});
if (!expectsAnnexB) {
decoderConfigDescription = serializedRecord;
}
}
if (!expectsAnnexB) {
const NAL_UNIT_LENGTH_SIZE = 4;
const nalUnits: NalUnitLocation[] = [];
for (const loc of iterateNalUnitsInAnnexB(packetData)) {
if (this.codec === 'avc') {
const naluType = extractNalUnitTypeForAvc(packetData[loc.offset]!);
// Certain NALUs get stripped
if (
naluType !== AvcNalUnitType.SPS
&& naluType !== AvcNalUnitType.PPS
&& naluType !== AvcNalUnitType.SPS_EXT
) {
nalUnits.push(loc);
}
} else {
const naluType = extractNalUnitTypeForHevc(packetData[loc.offset]!);
// Certain NALUs get stripped
if (
naluType !== HevcNalUnitType.SPS_NUT
&& naluType !== HevcNalUnitType.PPS_NUT
&& naluType !== HevcNalUnitType.VPS_NUT
) {
nalUnits.push(loc);
}
}
}
let totalSize = 0;
for (const nalUnit of nalUnits) {
totalSize += NAL_UNIT_LENGTH_SIZE + nalUnit.length;
}
const lengthPrefixedData = new Uint8Array(totalSize);
const dataView = new DataView(lengthPrefixedData.buffer);
let offset = 0;
// Write each NAL unit with its length prefix
for (const nalUnit of nalUnits) {
const length = nalUnit.length;
dataView.setUint32(offset, length, false);
offset += 4;
lengthPrefixedData.set(
packetData.subarray(nalUnit.offset, nalUnit.offset + nalUnit.length),
offset,
);
offset += nalUnit.length;
}
packetData = lengthPrefixedData;
}
} else if (this.codec === 'vp8') {
if (!this.packetEmitted) {
decoderConfigCodecString = extractVideoCodecString({
width: this.config.width,
height: this.config.height,
codec: 'vp8',
codecDescription: null,
colorSpace: null,
avcType: null,
avcCodecInfo: null,
hevcCodecInfo: null,
vp9CodecInfo: null,
av1CodecInfo: null,
});
}
} else if (this.codec === 'vp9') {
if (!this.packetEmitted) {
const vp9CodecInfo = extractVp9CodecInfoFromPacket(packetData);
decoderConfigCodecString = extractVideoCodecString({
width: this.config.width,
height: this.config.height,
codec: 'vp9',
codecDescription: null,
colorSpace: null,
avcType: null,
avcCodecInfo: null,
hevcCodecInfo: null,
vp9CodecInfo,
av1CodecInfo: null,
});
}
} else if (this.codec === 'av1') {
if (!this.packetEmitted) {
const av1CodecInfo = extractAv1CodecInfoFromPacket(packetData);
decoderConfigCodecString = extractVideoCodecString({
width: this.config.width,
height: this.config.height,
codec: 'av1',
codecDescription: null,
colorSpace: null,
avcType: null,
avcCodecInfo: null,
hevcCodecInfo: null,
vp9CodecInfo: null,
av1CodecInfo,
});
}
} else {
throw new Error('Unreachable.');
}
const packet = new EncodedPacket(
packetData,
this.packet.isKeyframe ? 'key' : 'delta',
timestamp,
duration,
);
if (decoderConfigCodecString !== null) {
// Create the decoder config
metadata.decoderConfig = {
codec: decoderConfigCodecString,
codedWidth: this.codecContext.width,
codedHeight: this.codecContext.height,
displayAspectWidth: this.config.displayWidth ?? this.codecContext.width,
displayAspectHeight: this.config.displayHeight ?? this.codecContext.height,
description: decoderConfigDescription ?? undefined,
colorSpace: {
primaries:
unmapColorPrimaries(this.codecContext.colorPrimaries) as VideoColorPrimaries,
matrix:
unmapMatrixCoefficients(this.codecContext.colorSpace) as VideoMatrixCoefficients,
transfer:
unmapTransferCharacteristics(this.codecContext.colorTrc) as VideoTransferCharacteristics,
fullRange: this.codecContext.colorRange === NodeAv.AVCOL_RANGE_JPEG
? true
: this.codecContext.colorRange === NodeAv.AVCOL_RANGE_MPEG
? false
: undefined,
},
};
}
this.onPacket(packet, metadata);
this.packetEmitted = true;
}
async flush(): Promise<void> {
if (this.codecContext) {
// Send null frame to signal flush
const ret = await this.codecContext.sendFrame(null);
NodeAv.FFmpegError.throwIfError(ret, 'Send frame');
// Keep receiving packets until no more are available
while (true) {
const receiveRet = await this.codecContext.receivePacket(this.packet);
if (receiveRet === NodeAv.AVERROR_EAGAIN || receiveRet === NodeAv.AVERROR_EOF) {
break;
}
this.receivePacket(receiveRet);
}
this.codecContext.freeContext();
this.codecContext = null;
// The codec is done now and can't be reused. Any subsequence encode call will first need to recreate a
// codec context.
}
this.packetEmitted = false;
this.colorSpaceSet = false;
}
close(): MaybePromise<void> {
this.codecContext?.freeContext();
this.frame.free();
this.packet.free();
this.scaler?.freeContext();
this.dstFrame?.free();
}
}
packages/server/src/video-sample.ts
+520
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@@ -0,0 +1,520 @@
import assert from 'assert';
import { Rectangle, VideoSamplePixelFormat } from 'mediabunny';
import { VideoSampleColorSpace } from 'mediabunny';
import { VideoSampleResource } from 'mediabunny';
import * as NodeAv from 'node-av';
import { toUint8Array } from '../../../src/misc';
import { getPlaneConfigs } from '../../../src/sample';
import {
toPixelFormat,
unmapColorPrimaries,
unmapTransferCharacteristics,
unmapMatrixCoefficients,
fromPixelFormat,
mapColorPrimaries,
mapTransferCharacteristics,
mapMatrixCoefficients,
} from './misc';
export class NodeAvFrameVideoSampleResource extends VideoSampleResource {
frame: NodeAv.Frame;
constructor(frame: NodeAv.Frame) {
super();
const clone = frame.clone();
if (!clone) {
throw new Error('Allocation failure during frame clone.');
}
this.frame = clone;
}
getFormat(): VideoSamplePixelFormat | null {
return toPixelFormat(this.frame.format as NodeAv.AVPixelFormat);
}
getCodedWidth(): number {
return this.frame.width;
}
getCodedHeight(): number {
return this.frame.height;
}
getSquarePixelWidth(): number {
if (this.frame.sampleAspectRatio.num > this.frame.sampleAspectRatio.den) {
return Math.round(this.frame.width * this.frame.sampleAspectRatio.num / this.frame.sampleAspectRatio.den);
} else {
return this.frame.width;
}
}
getSquarePixelHeight(): number {
if (this.frame.sampleAspectRatio.num > this.frame.sampleAspectRatio.den) {
return this.frame.height;
} else {
return Math.round(this.frame.height * this.frame.sampleAspectRatio.den / this.frame.sampleAspectRatio.num);
}
}
getColorSpace(): VideoSampleColorSpace {
return new VideoSampleColorSpace({
primaries: unmapColorPrimaries(this.frame.colorPrimaries) as VideoColorPrimaries | null,
transfer: unmapTransferCharacteristics(this.frame.colorTrc) as VideoTransferCharacteristics | null,
matrix: unmapMatrixCoefficients(this.frame.colorSpace) as VideoMatrixCoefficients | null,
fullRange: this.frame.colorRange === NodeAv.AVCOL_RANGE_JPEG,
});
}
close(): void {
this.frame.free();
}
allocationSize(options: VideoFrameCopyToOptions): number {
// 3. Let combinedLayout be the result of running the Parse VideoFrameCopyToOptions algorithm with options.
// 4. If combinedLayout is an exception, throw combinedLayout.
const combinedLayout = ParseVideoFrameCopyToOptions(this, options);
// 5. Return combinedLayout's allocationSize.
return combinedLayout.allocationSize;
}
async copyTo(
destination: AllowSharedBufferSource,
options: VideoFrameCopyToOptions,
): Promise<PlaneLayout[]> {
const format = this.getFormat();
assert(format !== null);
// 3. Let combinedLayout be the result of running the Parse VideoFrameCopyToOptions algorithm with options.
const combinedLayout = ParseVideoFrameCopyToOptions(this, options);
// 4. If destination.byteLength is less than combinedLayout’s allocationSize, return a promise rejected with
// // eslint-disable-next-line @stylistic/max-len
const destBytes = toUint8Array(destination);
if (destBytes.byteLength < combinedLayout.allocationSize) {
throw new TypeError(
`Destination buffer too small. Required: ${combinedLayout.allocationSize},`
+ ` Available: ${destBytes.byteLength}`,
);
}
// 5. If options.format is equal to one of RGBA, RGBX, BGRA, BGRX then:
if (options.format && ['RGBA', 'RGBX', 'BGRA', 'BGRX'].includes(options.format) && options.format !== format) {
// Let newOptions be the result of running the Clone Configuration algorithm with options.
// Assign undefined to newOptions.format.
const newOptions = { ...options };
delete newOptions.format;
// Let rgbFrame be the result of running the Convert to RGB frame algorithm with this, options.format,
// and options.colorSpace.
const rgbFrame = await ConvertToRGBFrame(this, options.format, options.colorSpace);
// Return the result of calling copyTo() on rgbFrame with destination and newOptions.
try {
const result = await rgbFrame.copyTo(destination, newOptions);
rgbFrame.close();
return result;
} catch (e) {
rgbFrame.close();
throw e;
}
}
// 6. Let p be a new Promise. (Implicit)
// 7. Let copyStepsQueue be the result of starting a new parallel queue. (Implicit)
// 8. Let planeLayouts be a new list.
const planeLayouts: PlaneLayout[] = [];
// Enqueue the following steps to copyStepsQueue: (fuck the queuing part)
// Let resource be the media resource referenced by [[resource reference]].
// (this.data)
// Let numPlanes be the number of planes as defined by [[format]].
const planes = getPlaneConfigs(format);
const numPlanes = planes.length;
// Let planeIndex be 0.
// While planeIndex is less than combinedLayout’s numPlanes:
for (let planeIndex = 0; planeIndex < numPlanes; planeIndex++) {
const computedLayout = combinedLayout.computedLayouts[planeIndex]!;
// Let sourceStride be the stride of the plane in resource as identified by planeIndex.
let sourceStride = 0;
let sourceStartOffset = 0;
sourceStride = this.frame.linesize[planeIndex]!;
const planeBuffer = this.frame.data![planeIndex]!;
if (!planeBuffer) {
throw new Error(`Missing data for plane ${planeIndex}`);
}
const sourceData = new Uint8Array(planeBuffer.buffer, planeBuffer.byteOffset, planeBuffer.byteLength);
sourceStartOffset = 0;
// Let sourceOffset be the product of multiplying computedLayout’s sourceTop by sourceStride
let sourceOffset = computedLayout.sourceTop * sourceStride;
// Add computedLayout’s sourceLeftBytes to sourceOffset.
sourceOffset += computedLayout.sourceLeftBytes;
// Adjust for the base offset of the plane in the source buffer
sourceOffset += sourceStartOffset;
// Let destinationOffset be computedLayout’s destinationOffset.
let destinationOffset = computedLayout.destinationOffset;
// Let rowBytes be computedLayout’s sourceWidthBytes.
const rowBytes = computedLayout.sourceWidthBytes;
// Let layout be a new PlaneLayout, with offset set to destinationOffset and stride set to rowBytes.
// This is a spec error actually (https://github.com/w3c/webcodecs/issues/918)
const layout: PlaneLayout = {
offset: destinationOffset,
stride: computedLayout.destinationStride,
};
// Let row be 0.
// While row is less than computedLayout’s sourceHeight:
for (let row = 0; row < computedLayout.sourceHeight; row++) {
// Copy rowBytes bytes from resource starting at sourceOffset to destination starting
// at destinationOffset.
if (sourceOffset + rowBytes > sourceData.byteLength) {
throw new Error(`Source buffer OOB read`);
}
if (destinationOffset + rowBytes > destBytes.byteLength) {
throw new Error(`Destination buffer OOB write`);
}
const srcSub = sourceData.subarray(sourceOffset, sourceOffset + rowBytes);
destBytes.set(srcSub, destinationOffset);
// Increment sourceOffset by sourceStride.
sourceOffset += sourceStride;
// Increment destinationOffset by computedLayout’s destinationStride.
destinationOffset += computedLayout.destinationStride;
}
// Append layout to planeLayouts.
planeLayouts.push(layout);
}
// Queue a task to resolve p with planeLayouts.
return planeLayouts;
}
}
type CombinedBufferLayout = {
allocationSize: number;
computedLayouts: ComputedPlaneLayout[];
};
type ComputedPlaneLayout = {
destinationOffset: number;
destinationStride: number;
sourceTop: number;
sourceHeight: number;
sourceLeftBytes: number;
sourceWidthBytes: number;
};
// Taken from the WebCodecs spec
const ParseVideoFrameCopyToOptions = (
frame: VideoSampleResource,
options: VideoFrameCopyToOptions,
): CombinedBufferLayout => {
// 1. Let defaultRect be the result of performing the getter steps for visibleRect.
const defaultRect: Rectangle = {
left: 0,
top: 0,
width: frame.getCodedWidth(),
height: frame.getCodedHeight(),
};
// 2. Let overrideRect be undefined.
// 3. If options.rect exists, assign the value of options.rect to overrideRect.
const overrideRect = options.rect;
// 4. Let parsedRect be the result of running the Parse Visible Rect algorithm...
const parsedRect = ParseVisibleRect(
defaultRect,
overrideRect,
frame.getCodedWidth(),
frame.getCodedHeight(),
frame.getFormat(),
);
// 5. If parsedRect is an exception, return parsedRect. (Handled by throw)
// 6. Let optLayout be undefined.
// 7. If options.layout exists, assign its value to optLayout.
const optLayout = options.layout;
// 8. Let format be undefined.
let format: VideoSamplePixelFormat | undefined;
// 9. If options.format does not exist, assign [[format]] to format.
if (!options.format || options.format === frame.getFormat()) {
format = frame.getFormat()!;
} else if (['RGBA', 'RGBX', 'BGRA', 'BGRX'].includes(options.format)) {
// 10. Otherwise, if options.format is equal to one of RGBA, RGBX, BGRA, BGRX, then assign options.format
// to format...
format = options.format;
} else {
throw new Error('NotSupportedError: Invalid destination format');
}
// 11. Let combinedLayout be the result of running the Compute Layout and Allocation Size algorithm...
return ComputeLayoutAndAllocationSize(parsedRect, format, optLayout);
};
// Taken from the WebCodecs spec
const ParseVisibleRect = (
defaultRect: DOMRectInit,
overrideRect: DOMRectInit | undefined,
codedWidth: number,
codedHeight: number,
format: VideoSamplePixelFormat | null,
): DOMRectInit => {
// 1. Let sourceRect be defaultRect
const sourceRect = { ...defaultRect };
// 2. If overrideRect is not undefined:
if (overrideRect !== undefined) {
// If either of overrideRect.width or height is 0, return a TypeError.
if (overrideRect.width === 0 || overrideRect.height === 0) {
throw new TypeError('visibleRect dimensions cannot be zero');
}
// If the sum of overrideRect.x and overrideRect.width is greater than codedWidth, return a TypeError.
if ((overrideRect.x || 0) + (overrideRect.width || 0) > codedWidth) {
throw new TypeError('visibleRect exceeds codedWidth');
}
// If the sum of overrideRect.y and overrideRect.height is greater than codedHeight, return a TypeError.
if ((overrideRect.y || 0) + (overrideRect.height || 0) > codedHeight) {
throw new TypeError('visibleRect exceeds codedHeight');
}
// Assign overrideRect to sourceRect.
sourceRect.x = overrideRect.x || 0;
sourceRect.y = overrideRect.y || 0;
sourceRect.width = overrideRect.width || 0;
sourceRect.height = overrideRect.height || 0;
}
// 3. Let validAlignment be the result of running the Verify Rect Offset Alignment algorithm.
const validAlignment = VerifyRectOffsetAlignment(format, sourceRect);
// 4. If validAlignment is false, throw a TypeError.
if (!validAlignment) {
throw new TypeError('visibleRect alignment is invalid for the format');
}
// 5. Return sourceRect.
return sourceRect;
};
// Taken from the WebCodecs spec
const VerifyRectOffsetAlignment = (format: VideoSamplePixelFormat | null, rect: DOMRectInit): boolean => {
// 1. If format is null, return true.
if (format === null) return true;
const planes = getPlaneConfigs(format);
// 2. Let planeIndex be 0.
// 3. Let numPlanes be the number of planes as defined by format.
// 4. While planeIndex is less than numPlanes:
for (let planeIndex = 0; planeIndex < planes.length; planeIndex++) {
const plane = planes[planeIndex]!;
const sampleWidth = plane.widthDivisor;
const sampleHeight = plane.heightDivisor;
// If rect.x is not a multiple of sampleWidth, return false.
if ((rect.x || 0) % sampleWidth !== 0) return false;
// If rect.y is not a multiple of sampleHeight, return false.
if ((rect.y || 0) % sampleHeight !== 0) return false;
}
return true;
};
// Taken from the WebCodecs spec
const ComputeLayoutAndAllocationSize = (
parsedRect: DOMRectInit,
format: VideoSamplePixelFormat,
layout?: PlaneLayout[],
): CombinedBufferLayout => {
const planes = getPlaneConfigs(format);
// 1. Let numPlanes be the number of planes as defined by format.
const numPlanes = planes.length;
// 2. If layout is not undefined and its length does not equal numPlanes, throw a TypeError.
if (layout !== undefined && layout.length !== numPlanes) {
throw new TypeError(`Layout must have ${numPlanes} planes`);
}
// 3. Let minAllocationSize be 0.
let minAllocationSize = 0;
// 4. Let computedLayouts be a new list.
const computedLayouts: ComputedPlaneLayout[] = [];
// 5. Let endOffsets be a new list.
const endOffsets: number[] = [];
// 6. Let planeIndex be 0.
// 7. While planeIndex < numPlanes:
for (let planeIndex = 0; planeIndex < numPlanes; planeIndex++) {
const plane = planes[planeIndex]!;
const sampleBytes = plane.sampleBytes;
const sampleWidth = plane.widthDivisor;
const sampleHeight = plane.heightDivisor;
// Let computedLayout be a new computed plane layout.
const computedLayout: ComputedPlaneLayout = {
destinationOffset: 0,
destinationStride: 0,
sourceTop: 0,
sourceHeight: 0,
sourceLeftBytes: 0,
sourceWidthBytes: 0,
};
// Set computedLayout’s sourceTop...
computedLayout.sourceTop = Math.ceil(Math.trunc(parsedRect.y || 0) / sampleHeight);
// Set computedLayout’s sourceHeight...
computedLayout.sourceHeight = Math.ceil(Math.trunc(parsedRect.height || 0) / sampleHeight);
// Set computedLayout’s sourceLeftBytes...
computedLayout.sourceLeftBytes = Math.floor(Math.trunc(parsedRect.x || 0) / sampleWidth) * sampleBytes;
// Set computedLayout’s sourceWidthBytes...
computedLayout.sourceWidthBytes = Math.floor(Math.trunc(parsedRect.width || 0) / sampleWidth) * sampleBytes;
// If layout is not undefined:
if (layout !== undefined) {
const planeLayout = layout[planeIndex]!;
// If planeLayout.stride is less than computedLayout’s sourceWidthBytes, return a TypeError.
if (planeLayout.stride < computedLayout.sourceWidthBytes) {
throw new TypeError(`Stride for plane ${planeIndex} is too small`);
}
// Assign planeLayout.offset to computedLayout’s destinationOffset.
computedLayout.destinationOffset = planeLayout.offset;
// Assign planeLayout.stride to computedLayout’s destinationStride.
computedLayout.destinationStride = planeLayout.stride;
} else {
// Otherwise:
// Assign minAllocationSize to computedLayout’s destinationOffset.
computedLayout.destinationOffset = minAllocationSize;
// Assign computedLayout’s sourceWidthBytes to computedLayout’s destinationStride.
computedLayout.destinationStride = computedLayout.sourceWidthBytes;
}
// Let planeSize be the product of multiplying computedLayout’s destinationStride and sourceHeight.
const planeSize = computedLayout.destinationStride * computedLayout.sourceHeight;
// Let planeEnd be the sum of planeSize and computedLayout’s destinationOffset.
const planeEnd = planeSize + computedLayout.destinationOffset;
// If planeSize or planeEnd is greater than maximum range of unsigned long, return a TypeError.
if (planeEnd > 4294967295) throw new TypeError('Allocation size exceeds limit');
// Append planeEnd to endOffsets.
endOffsets.push(planeEnd);
// Assign the maximum of minAllocationSize and planeEnd to minAllocationSize.
minAllocationSize = Math.max(minAllocationSize, planeEnd);
// Check for overlap
for (let earlierPlaneIndex = 0; earlierPlaneIndex < planeIndex; earlierPlaneIndex++) {
const earlierLayout = computedLayouts[earlierPlaneIndex]!;
// If plane A ends before plane B starts, they do not overlap.
if (
endOffsets[planeIndex]! <= earlierLayout.destinationOffset
|| endOffsets[earlierPlaneIndex]! <= computedLayout.destinationOffset
) {
continue;
}
throw new TypeError('Planes overlap');
}
computedLayouts.push(computedLayout);
}
// 12. Return combinedLayout.
return {
allocationSize: minAllocationSize,
computedLayouts: computedLayouts,
};
};
// Taken from the WebCodecs spec
const ConvertToRGBFrame = async (
frame: NodeAvFrameVideoSampleResource,
format: VideoPixelFormat,
colorSpace?: PredefinedColorSpace,
): Promise<NodeAvFrameVideoSampleResource> => {
// 1. Let convertedFrame be a new VideoFrame...
// (We construct it at the end, but we prepare the resource here)
const width = frame.getCodedWidth();
const height = frame.getCodedHeight();
const scaler = new NodeAv.SoftwareScaleContext();
const srcFmt = fromPixelFormat(frame.getFormat()!);
const dstFmt = fromPixelFormat(format);
// Configure scaling: Source -> Destination (Visible Size)
scaler.getContext(
width, height, srcFmt,
width, height, dstFmt,
NodeAv.SWS_BILINEAR,
);
// Allocate destination frame
const dstFrame = new NodeAv.Frame();
dstFrame.width = width;
dstFrame.height = height;
dstFrame.format = dstFmt;
dstFrame.alloc();
dstFrame.allocBuffer();
// Apply destination color space settings to dstFrame
// If colorSpace is not provided, srgb is used
const targetColorSpace = colorSpace || 'srgb';
if (targetColorSpace === 'srgb') {
dstFrame.colorPrimaries = NodeAv.AVCOL_PRI_BT709;
dstFrame.colorTrc = NodeAv.AVCOL_TRC_IEC61966_2_1;
dstFrame.colorSpace = NodeAv.AVCOL_SPC_RGB;
dstFrame.colorRange = NodeAv.AVCOL_RANGE_JPEG;
} else if (targetColorSpace === 'display-p3') {
dstFrame.colorPrimaries = NodeAv.AVCOL_PRI_SMPTE432;
dstFrame.colorTrc = NodeAv.AVCOL_TRC_IEC61966_2_1;
dstFrame.colorSpace = NodeAv.AVCOL_SPC_RGB;
dstFrame.colorRange = NodeAv.AVCOL_RANGE_JPEG;
}
const srcFrame = frame.frame;
// Apply source color space settings to srcFrame (if known)
// This ensures the scaler knows the input color space for correct conversion
const frameColorSpace = frame.getColorSpace();
if (colorSpace) {
srcFrame.colorPrimaries = mapColorPrimaries(frameColorSpace.primaries ?? 'unknown')
?? NodeAv.AVCOL_PRI_UNSPECIFIED;
srcFrame.colorTrc = mapTransferCharacteristics(frameColorSpace.transfer ?? 'unknown')
?? NodeAv.AVCOL_TRC_UNSPECIFIED;
srcFrame.colorSpace = mapMatrixCoefficients(frameColorSpace.matrix ?? 'unknown')
?? NodeAv.AVCOL_SPC_UNSPECIFIED;
srcFrame.colorRange = frameColorSpace.fullRange
? NodeAv.AVCOL_RANGE_JPEG
: NodeAv.AVCOL_RANGE_MPEG;
}
try {
await scaler.scaleFrame(dstFrame, srcFrame);
} finally {
scaler.freeContext();
}
return new NodeAvFrameVideoSampleResource(dstFrame);
};
packages/server/tsconfig.json
+24
View File
@@ -0,0 +1,24 @@
{
"extends": "../../tsconfig.json",
"compilerOptions": {
"composite": true,
"outDir": "./dist/modules",
"declaration": true,
"declarationMap": true,
"stripInternal": true,
"noEmit": false,
"moduleResolution": "nodenext",
"module": "nodenext",
"allowJs": true,
"paths": {
"mediabunny": ["../../src/index.ts"],
},
},
"include": [
"./src/**/*",
"./build/**/*",
],
"references": [
{ "path": "../../src" }
]
}
packages/server/tsdoc.json
+4
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@@ -0,0 +1,4 @@
{
"$schema": "https://developer.microsoft.com/json-schemas/tsdoc/v0/tsdoc.schema.json",
"extends": ["../../tsdoc.json"]
}