mirror of
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Add @mediabunny/aac-encoder extension package
This commit is contained in:
Vanilagy
@@ -0,0 +1 @@
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build/* linguist-generated
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@@ -0,0 +1,373 @@
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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.
|
||||
@@ -0,0 +1,156 @@
|
||||
# @mediabunny/aac-encoder
|
||||
|
||||
[](https://www.npmjs.com/package/@mediabunny/aac-encoder)
|
||||
[](https://bundlephobia.com/package/@mediabunny/aac-encoder)
|
||||
[](https://www.npmjs.com/package/@mediabunny/aac-encoder)
|
||||
[](https://discord.gg/hmpkyYuS4U)
|
||||
|
||||
<div align="center">
|
||||
<img src="../../docs/public/mediabunny-logo.svg" width="180" height="180">
|
||||
</div>
|
||||
|
||||
Some browsers lack support for AAC encoding in their WebCodecs implementations. This extension package provides a reliable AAC-LC encoder for use with [Mediabunny](https://github.com/Vanilagy/mediabunny). It is implemented using Mediabunny's [custom coder API](https://mediabunny.dev/guide/supported-formats-and-codecs#custom-coders) and uses a fast, size-optimized WASM build of [FFmpeg](https://ffmpeg.org/)'s AAC encoder under the hood.
|
||||
|
||||
> This package, like the rest of Mediabunny, is enabled by its [sponsors](https://mediabunny.dev/#sponsors) and their donations. If you've derived value from this package, please consider [leaving a donation](https://github.com/sponsors/Vanilagy)! 💘
|
||||
|
||||
## Installation
|
||||
|
||||
This library peer-depends on Mediabunny. Install both using npm:
|
||||
```bash
|
||||
npm install mediabunny @mediabunny/aac-encoder
|
||||
```
|
||||
|
||||
Alternatively, directly include them using a script tag:
|
||||
```html
|
||||
<script src="mediabunny.js"></script>
|
||||
<script src="mediabunny-aac-encoder.js"></script>
|
||||
```
|
||||
|
||||
This will expose the global objects `Mediabunny` and `MediabunnyAacEncoder`. Use `mediabunny-aac-encoder.d.ts` to provide types for these globals. You can download the built distribution files from the [releases page](https://github.com/Vanilagy/mediabunny/releases).
|
||||
|
||||
## Usage
|
||||
|
||||
```ts
|
||||
import { registerAacEncoder } from '@mediabunny/aac-encoder';
|
||||
|
||||
registerAacEncoder();
|
||||
```
|
||||
That's it - Mediabunny now uses the registered AAC encoder automatically.
|
||||
|
||||
If you want to be more correct, check for native browser support first:
|
||||
```ts
|
||||
import { canEncodeAudio } from 'mediabunny';
|
||||
import { registerAacEncoder } from '@mediabunny/aac-encoder';
|
||||
|
||||
if (!(await canEncodeAudio('aac'))) {
|
||||
registerAacEncoder();
|
||||
}
|
||||
```
|
||||
|
||||
## Example
|
||||
|
||||
Here, we convert an input file to an MP4 with AAC audio:
|
||||
|
||||
```ts
|
||||
import {
|
||||
Input,
|
||||
ALL_FORMATS,
|
||||
BlobSource,
|
||||
Output,
|
||||
BufferTarget,
|
||||
Mp4OutputFormat,
|
||||
canEncodeAudio,
|
||||
Conversion,
|
||||
} from 'mediabunny';
|
||||
import { registerAacEncoder } from '@mediabunny/aac-encoder';
|
||||
|
||||
if (!(await canEncodeAudio('aac'))) {
|
||||
// Only register the custom encoder if there's no native support
|
||||
registerAacEncoder();
|
||||
}
|
||||
|
||||
const input = new Input({
|
||||
source: new BlobSource(file), // From a file picker, for example
|
||||
formats: ALL_FORMATS,
|
||||
});
|
||||
const output = new Output({
|
||||
format: new Mp4OutputFormat(),
|
||||
target: new BufferTarget(),
|
||||
});
|
||||
|
||||
const conversion = await Conversion.init({
|
||||
input,
|
||||
output,
|
||||
});
|
||||
await conversion.execute();
|
||||
|
||||
output.target.buffer; // => ArrayBuffer containing the MP4 file
|
||||
```
|
||||
|
||||
For more ways of using Mediabunny, refer to its [guide](https://mediabunny.dev/guide/introduction).
|
||||
|
||||
## Building and development
|
||||
|
||||
For simplicity, all built WASM artifacts are included in the repo, since these rarely change. However, here are the instructions for building them from scratch:
|
||||
|
||||
[Install Emscripten](https://emscripten.org/docs/getting_started/downloads.html) and clone [FFmpeg](https://github.com/FFmpeg/FFmpeg). Then, from the Mediabunny root and with Emscripten sourced in:
|
||||
|
||||
```bash
|
||||
export FFMPEG_PATH=/path/to/ffmpeg
|
||||
export MEDIABUNNY_ROOT=$PWD
|
||||
|
||||
# Build FFmpeg
|
||||
cd $FFMPEG_PATH
|
||||
emmake make distclean
|
||||
emconfigure ./configure \
|
||||
--target-os=none \
|
||||
--arch=x86_32 \
|
||||
--enable-cross-compile \
|
||||
--disable-asm \
|
||||
--disable-x86asm \
|
||||
--disable-inline-asm \
|
||||
--disable-programs \
|
||||
--disable-doc \
|
||||
--disable-debug \
|
||||
--disable-all \
|
||||
--disable-everything \
|
||||
--disable-autodetect \
|
||||
--disable-pthreads \
|
||||
--disable-runtime-cpudetect \
|
||||
--enable-avcodec \
|
||||
--enable-encoder=aac \
|
||||
--cc="emcc" \
|
||||
--cxx=em++ \
|
||||
--ar=emar \
|
||||
--ranlib=emranlib \
|
||||
--extra-cflags="-DNDEBUG -Oz -flto -msimd128" \
|
||||
--extra-ldflags="-Oz -flto"
|
||||
emmake make
|
||||
|
||||
# Compile the bridge between JavaScript and FFmpeg's API
|
||||
cd $MEDIABUNNY_ROOT/packages/aac-encoder
|
||||
emcc src/bridge.c \
|
||||
$FFMPEG_PATH/libavcodec/libavcodec.a \
|
||||
$FFMPEG_PATH/libavutil/libavutil.a \
|
||||
-I$FFMPEG_PATH \
|
||||
-s MODULARIZE=1 \
|
||||
-s EXPORT_ES6=1 \
|
||||
-s SINGLE_FILE=1 \
|
||||
-s ALLOW_MEMORY_GROWTH=1 \
|
||||
-s ENVIRONMENT=web,worker \
|
||||
-s FILESYSTEM=0 \
|
||||
-s MALLOC=emmalloc \
|
||||
-s SUPPORT_LONGJMP=0 \
|
||||
-s EXPORTED_RUNTIME_METHODS=cwrap,HEAPU8 \
|
||||
-s EXPORTED_FUNCTIONS=_malloc,_free \
|
||||
-msimd128 \
|
||||
-flto \
|
||||
-Oz \
|
||||
-o build/aac.js
|
||||
```
|
||||
|
||||
This generates `build/aac.js`, which contains both the JavaScript "glue code" as well as the compiled WASM inlined.
|
||||
|
||||
### Building the package
|
||||
|
||||
Then, the complete JavaScript package can be built alongside the rest of Mediabunny by running `npm run build` in Mediabunny's root.
|
||||
@@ -0,0 +1,37 @@
|
||||
{
|
||||
"$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-aac-encoder.d.ts"
|
||||
},
|
||||
"tsdocMetadata": {
|
||||
"enabled": false
|
||||
},
|
||||
"messages": {
|
||||
"compilerMessageReporting": {
|
||||
"default": {
|
||||
"logLevel": "warning"
|
||||
}
|
||||
},
|
||||
"extractorMessageReporting": {
|
||||
"default": {
|
||||
"logLevel": "warning"
|
||||
}
|
||||
},
|
||||
"tsdocMessageReporting": {
|
||||
"default": {
|
||||
"logLevel": "warning"
|
||||
}
|
||||
}
|
||||
},
|
||||
"newlineKind": "lf"
|
||||
}
|
||||
Generated
BIN
Binary file not shown.
@@ -0,0 +1,55 @@
|
||||
{
|
||||
"name": "@mediabunny/aac-encoder",
|
||||
"author": "Vanilagy",
|
||||
"version": "1.35.1",
|
||||
"description": "AAC encoder extension for Mediabunny, based on FFmpeg.",
|
||||
"main": "./dist/bundles/mediabunny-aac-encoder.mjs",
|
||||
"module": "./dist/bundles/mediabunny-aac-encoder.mjs",
|
||||
"types": "./dist/modules/src/index.d.ts",
|
||||
"exports": {
|
||||
"types": "./dist/modules/src/index.d.ts",
|
||||
"import": "./dist/bundles/mediabunny-aac-encoder.mjs",
|
||||
"require": "./dist/bundles/mediabunny-aac-encoder.mjs"
|
||||
},
|
||||
"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/aac-encoder"
|
||||
},
|
||||
"bugs": {
|
||||
"url": "https://github.com/Vanilagy/mediabunny/issues"
|
||||
},
|
||||
"homepage": "https://mediabunny.dev/guide/extensions/aac-encoder",
|
||||
"funding": {
|
||||
"type": "individual",
|
||||
"url": "https://github.com/sponsors/Vanilagy"
|
||||
},
|
||||
"peerDependencies": {
|
||||
"mediabunny": "^1.0.0"
|
||||
},
|
||||
"devDependencies": {
|
||||
"@types/emscripten": "^1.40.1"
|
||||
},
|
||||
"keywords": [
|
||||
"aac",
|
||||
"encoding",
|
||||
"codec",
|
||||
"mediabunny",
|
||||
"ffmpeg",
|
||||
"browser",
|
||||
"wasm",
|
||||
"polyfill"
|
||||
]
|
||||
}
|
||||
@@ -0,0 +1,190 @@
|
||||
/*!
|
||||
* Copyright (c) 2026-present, Vanilagy and contributors
|
||||
*
|
||||
* 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/.
|
||||
*/
|
||||
|
||||
#include <emscripten.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include "libavcodec/avcodec.h"
|
||||
#include "libavutil/opt.h"
|
||||
#include "libavutil/channel_layout.h"
|
||||
#include "libavutil/log.h"
|
||||
|
||||
typedef struct {
|
||||
AVCodecContext *codec_ctx;
|
||||
AVPacket *packet;
|
||||
AVFrame *frame;
|
||||
float *input_buffer;
|
||||
int input_buffer_size;
|
||||
int encoded_pts;
|
||||
int encoded_duration;
|
||||
} EncoderContext;
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
EncoderContext *init_encoder(int channels, int sample_rate, int bitrate) {
|
||||
av_log_set_level(AV_LOG_ERROR);
|
||||
|
||||
const AVCodec *codec = avcodec_find_encoder(AV_CODEC_ID_AAC);
|
||||
if (!codec) return NULL;
|
||||
|
||||
AVCodecContext *codec_ctx = avcodec_alloc_context3(codec);
|
||||
if (!codec_ctx) return NULL;
|
||||
|
||||
codec_ctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
|
||||
codec_ctx->sample_rate = sample_rate;
|
||||
codec_ctx->bit_rate = bitrate;
|
||||
codec_ctx->time_base = (AVRational){1, sample_rate};
|
||||
|
||||
AVChannelLayout layout;
|
||||
av_channel_layout_default(&layout, channels);
|
||||
av_channel_layout_copy(&codec_ctx->ch_layout, &layout);
|
||||
av_channel_layout_uninit(&layout);
|
||||
|
||||
if (avcodec_open2(codec_ctx, codec, NULL) < 0) {
|
||||
avcodec_free_context(&codec_ctx);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
AVPacket *packet = av_packet_alloc();
|
||||
if (!packet) {
|
||||
avcodec_free_context(&codec_ctx);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
AVFrame *frame = av_frame_alloc();
|
||||
if (!frame) {
|
||||
av_packet_free(&packet);
|
||||
avcodec_free_context(&codec_ctx);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
frame->format = AV_SAMPLE_FMT_FLTP;
|
||||
frame->sample_rate = sample_rate;
|
||||
frame->nb_samples = codec_ctx->frame_size;
|
||||
av_channel_layout_copy(&frame->ch_layout, &codec_ctx->ch_layout);
|
||||
|
||||
if (av_frame_get_buffer(frame, 0) < 0) {
|
||||
av_frame_free(&frame);
|
||||
av_packet_free(&packet);
|
||||
avcodec_free_context(&codec_ctx);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
EncoderContext *ctx = malloc(sizeof(EncoderContext));
|
||||
if (!ctx) {
|
||||
av_frame_free(&frame);
|
||||
av_packet_free(&packet);
|
||||
avcodec_free_context(&codec_ctx);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
ctx->codec_ctx = codec_ctx;
|
||||
ctx->packet = packet;
|
||||
ctx->frame = frame;
|
||||
ctx->input_buffer = NULL;
|
||||
ctx->input_buffer_size = 0;
|
||||
ctx->encoded_pts = 0;
|
||||
ctx->encoded_duration = 0;
|
||||
|
||||
return ctx;
|
||||
}
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
int get_encoder_frame_size(EncoderContext *ctx) {
|
||||
return ctx->codec_ctx->frame_size;
|
||||
}
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
uint8_t *get_encoder_extradata(EncoderContext *ctx) {
|
||||
return ctx->codec_ctx->extradata;
|
||||
}
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
int get_encoder_extradata_size(EncoderContext *ctx) {
|
||||
return ctx->codec_ctx->extradata_size;
|
||||
}
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
float *get_encode_input_ptr(EncoderContext *ctx, int size) {
|
||||
if (ctx->input_buffer_size < size) {
|
||||
free(ctx->input_buffer);
|
||||
ctx->input_buffer = malloc(size);
|
||||
if (!ctx->input_buffer) {
|
||||
ctx->input_buffer_size = 0;
|
||||
return NULL;
|
||||
}
|
||||
ctx->input_buffer_size = size;
|
||||
}
|
||||
return ctx->input_buffer;
|
||||
}
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
int send_frame(EncoderContext *ctx, int pts) {
|
||||
int channels = ctx->codec_ctx->ch_layout.nb_channels;
|
||||
int frame_size = ctx->frame->nb_samples;
|
||||
|
||||
ctx->frame->pts = pts;
|
||||
|
||||
// Deinterleave f32 input into the frame's f32-planar planes
|
||||
float *input = ctx->input_buffer;
|
||||
for (int ch = 0; ch < channels; ch++) {
|
||||
float *plane = (float *)ctx->frame->data[ch];
|
||||
for (int i = 0; i < frame_size; i++) {
|
||||
plane[i] = input[i * channels + ch];
|
||||
}
|
||||
}
|
||||
|
||||
return avcodec_send_frame(ctx->codec_ctx, ctx->frame);
|
||||
}
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
int receive_packet(EncoderContext *ctx) {
|
||||
int ret = avcodec_receive_packet(ctx->codec_ctx, ctx->packet);
|
||||
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
|
||||
return 0;
|
||||
}
|
||||
if (ret < 0) return ret;
|
||||
|
||||
ctx->encoded_pts = ctx->packet->pts;
|
||||
ctx->encoded_duration = ctx->packet->duration;
|
||||
|
||||
return ctx->packet->size;
|
||||
}
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
void flush_encoder_start(EncoderContext *ctx) {
|
||||
avcodec_send_frame(ctx->codec_ctx, NULL);
|
||||
}
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
void reset_encoder(EncoderContext *ctx) {
|
||||
avcodec_flush_buffers(ctx->codec_ctx);
|
||||
}
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
uint8_t *get_encoded_data(EncoderContext *ctx) {
|
||||
return ctx->packet->data;
|
||||
}
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
int get_encoded_pts(EncoderContext *ctx) {
|
||||
return ctx->encoded_pts;
|
||||
}
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
int get_encoded_duration(EncoderContext *ctx) {
|
||||
return ctx->encoded_duration;
|
||||
}
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
void close_encoder(EncoderContext *ctx) {
|
||||
free(ctx->input_buffer);
|
||||
av_frame_free(&ctx->frame);
|
||||
av_packet_free(&ctx->packet);
|
||||
avcodec_free_context(&ctx->codec_ctx);
|
||||
free(ctx);
|
||||
}
|
||||
@@ -0,0 +1,204 @@
|
||||
/*!
|
||||
* Copyright (c) 2026-present, Vanilagy and contributors
|
||||
*
|
||||
* 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/.
|
||||
*/
|
||||
|
||||
import createModule from '../build/aac';
|
||||
import type { WorkerCommand, WorkerResponse, WorkerResponseData } from './shared';
|
||||
|
||||
type ExtendedEmscriptenModule = EmscriptenModule & {
|
||||
cwrap: typeof cwrap;
|
||||
};
|
||||
|
||||
let module: ExtendedEmscriptenModule;
|
||||
let modulePromise: Promise<ExtendedEmscriptenModule> | null = null;
|
||||
|
||||
let initEncoderFn: (channels: number, sampleRate: number, bitrate: number) => number;
|
||||
let getEncoderFrameSize: (ctx: number) => number;
|
||||
let getEncoderExtradata: (ctx: number) => number;
|
||||
let getEncoderExtradataSize: (ctx: number) => number;
|
||||
let getEncodeInputPtr: (ctx: number, size: number) => number;
|
||||
let sendFrameFn: (ctx: number, pts: number) => number;
|
||||
let receivePacketFn: (ctx: number) => number;
|
||||
let flushEncoderStartFn: (ctx: number) => void;
|
||||
let resetEncoderFn: (ctx: number) => void;
|
||||
let getEncodedData: (ctx: number) => number;
|
||||
let getEncodedPts: (ctx: number) => number;
|
||||
let getEncodedDuration: (ctx: number) => number;
|
||||
let closeEncoderFn: (ctx: number) => void;
|
||||
|
||||
const ensureModule = async () => {
|
||||
if (!module) {
|
||||
if (modulePromise) {
|
||||
return modulePromise;
|
||||
}
|
||||
|
||||
modulePromise = createModule() as Promise<ExtendedEmscriptenModule>;
|
||||
module = await modulePromise;
|
||||
modulePromise = null;
|
||||
|
||||
initEncoderFn = module.cwrap('init_encoder', 'number', ['number', 'number', 'number']);
|
||||
getEncoderFrameSize = module.cwrap('get_encoder_frame_size', 'number', ['number']);
|
||||
getEncoderExtradata = module.cwrap('get_encoder_extradata', 'number', ['number']);
|
||||
getEncoderExtradataSize = module.cwrap('get_encoder_extradata_size', 'number', ['number']);
|
||||
getEncodeInputPtr = module.cwrap('get_encode_input_ptr', 'number', ['number', 'number']);
|
||||
sendFrameFn = module.cwrap('send_frame', 'number', ['number', 'number']);
|
||||
receivePacketFn = module.cwrap('receive_packet', 'number', ['number']);
|
||||
flushEncoderStartFn = module.cwrap('flush_encoder_start', null, ['number']);
|
||||
resetEncoderFn = module.cwrap('reset_encoder', null, ['number']);
|
||||
getEncodedData = module.cwrap('get_encoded_data', 'number', ['number']);
|
||||
getEncodedPts = module.cwrap('get_encoded_pts', 'number', ['number']);
|
||||
getEncodedDuration = module.cwrap('get_encoded_duration', 'number', ['number']);
|
||||
closeEncoderFn = module.cwrap('close_encoder', null, ['number']);
|
||||
}
|
||||
};
|
||||
|
||||
const initEncoder = async (
|
||||
numberOfChannels: number,
|
||||
sampleRate: number,
|
||||
bitrate: number,
|
||||
) => {
|
||||
await ensureModule();
|
||||
|
||||
const ctx = initEncoderFn(numberOfChannels, sampleRate, bitrate);
|
||||
if (ctx === 0) {
|
||||
throw new Error('Failed to initialize AAC encoder.');
|
||||
}
|
||||
|
||||
const frameSize = getEncoderFrameSize(ctx);
|
||||
|
||||
const extradataPtr = getEncoderExtradata(ctx);
|
||||
const extradataSize = getEncoderExtradataSize(ctx);
|
||||
const extradata = module.HEAPU8.slice(extradataPtr, extradataPtr + extradataSize).buffer;
|
||||
|
||||
return { ctx, frameSize, extradata };
|
||||
};
|
||||
|
||||
type PacketInfo = { encodedData: ArrayBuffer; pts: number; duration: number };
|
||||
|
||||
const drainPackets = (ctx: number) => {
|
||||
const packets: PacketInfo[] = [];
|
||||
|
||||
let size: number;
|
||||
while ((size = receivePacketFn(ctx)) > 0) {
|
||||
const ptr = getEncodedData(ctx);
|
||||
const encodedData = module.HEAPU8.slice(ptr, ptr + size).buffer;
|
||||
const pts = getEncodedPts(ctx);
|
||||
const duration = getEncodedDuration(ctx);
|
||||
packets.push({ encodedData, pts, duration });
|
||||
}
|
||||
|
||||
return packets;
|
||||
};
|
||||
|
||||
const encode = (ctx: number, audioData: ArrayBuffer, timestamp: number) => {
|
||||
const audioBytes = new Uint8Array(audioData);
|
||||
|
||||
const inputPtr = getEncodeInputPtr(ctx, audioBytes.length);
|
||||
if (inputPtr === 0) {
|
||||
throw new Error('Failed to allocate encoder input buffer.');
|
||||
}
|
||||
module.HEAPU8.set(audioBytes, inputPtr);
|
||||
|
||||
const ret = sendFrameFn(ctx, timestamp);
|
||||
if (ret < 0) {
|
||||
throw new Error(`Encode failed with error code ${ret}.`);
|
||||
}
|
||||
|
||||
return drainPackets(ctx);
|
||||
};
|
||||
|
||||
const onMessage = (data: { id: number; command: WorkerCommand }) => {
|
||||
const { id, command } = data;
|
||||
|
||||
const handleCommand = async (): Promise<void> => {
|
||||
try {
|
||||
let result: WorkerResponseData;
|
||||
const transferables: Transferable[] = [];
|
||||
|
||||
switch (command.type) {
|
||||
case 'init': {
|
||||
const { ctx, frameSize, extradata } = await initEncoder(
|
||||
command.data.numberOfChannels,
|
||||
command.data.sampleRate,
|
||||
command.data.bitrate,
|
||||
);
|
||||
result = { type: command.type, ctx, frameSize, extradata };
|
||||
transferables.push(extradata);
|
||||
}; break;
|
||||
|
||||
case 'encode': {
|
||||
const packets = encode(
|
||||
command.data.ctx,
|
||||
command.data.audioData,
|
||||
command.data.timestamp,
|
||||
);
|
||||
for (const p of packets) {
|
||||
transferables.push(p.encodedData);
|
||||
}
|
||||
result = { type: command.type, packets };
|
||||
}; break;
|
||||
|
||||
case 'flush': {
|
||||
flushEncoderStartFn(command.data.ctx);
|
||||
const packets = drainPackets(command.data.ctx);
|
||||
for (const p of packets) {
|
||||
transferables.push(p.encodedData);
|
||||
}
|
||||
resetEncoderFn(command.data.ctx);
|
||||
result = { type: command.type, packets };
|
||||
}; break;
|
||||
|
||||
case 'close': {
|
||||
closeEncoderFn(command.data.ctx);
|
||||
result = { type: command.type };
|
||||
}; break;
|
||||
}
|
||||
|
||||
const response: WorkerResponse = {
|
||||
id,
|
||||
success: true,
|
||||
data: result,
|
||||
};
|
||||
sendMessage(response, transferables);
|
||||
} catch (error: unknown) {
|
||||
const response: WorkerResponse = {
|
||||
id,
|
||||
success: false,
|
||||
error,
|
||||
};
|
||||
sendMessage(response);
|
||||
}
|
||||
};
|
||||
|
||||
void handleCommand();
|
||||
};
|
||||
|
||||
const sendMessage = (data: unknown, transferables?: Transferable[]) => {
|
||||
if (parentPort) {
|
||||
parentPort.postMessage(data, transferables ?? []);
|
||||
} else {
|
||||
self.postMessage(data, { transfer: transferables ?? [] });
|
||||
}
|
||||
};
|
||||
|
||||
let parentPort: {
|
||||
postMessage: (data: unknown, transferables?: Transferable[]) => void;
|
||||
on: (event: string, listener: (data: never) => void) => void;
|
||||
} | null = null;
|
||||
|
||||
if (typeof self === 'undefined') {
|
||||
const workerModule = 'worker_threads';
|
||||
// eslint-disable-next-line @stylistic/max-len
|
||||
// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-require-imports, @typescript-eslint/no-unsafe-member-access
|
||||
parentPort = require(workerModule).parentPort;
|
||||
}
|
||||
|
||||
if (parentPort) {
|
||||
parentPort.on('message', onMessage);
|
||||
} else {
|
||||
self.addEventListener('message', event => onMessage(event.data as { id: number; command: WorkerCommand }));
|
||||
}
|
||||
@@ -0,0 +1,306 @@
|
||||
/*!
|
||||
* Copyright (c) 2026-present, Vanilagy and contributors
|
||||
*
|
||||
* 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/.
|
||||
*/
|
||||
|
||||
import {
|
||||
type AdtsHeaderTemplate,
|
||||
buildAdtsHeaderTemplate,
|
||||
parseAacAudioSpecificConfig,
|
||||
writeAdtsFrameLength,
|
||||
} from '../../../shared/aac-misc';
|
||||
import {
|
||||
CustomAudioEncoder,
|
||||
AudioCodec,
|
||||
AudioSample,
|
||||
EncodedPacket,
|
||||
registerEncoder,
|
||||
} from 'mediabunny';
|
||||
import type { WorkerCommand, WorkerResponse, WorkerResponseData } from './shared';
|
||||
// @ts-expect-error An esbuild plugin handles this, TypeScript doesn't need to understand
|
||||
import createWorker from './encode.worker';
|
||||
|
||||
const AAC_SAMPLE_RATES = [
|
||||
96000, 88200, 64000, 48000, 44100, 32000,
|
||||
24000, 22050, 16000, 12000, 11025, 8000, 7350,
|
||||
];
|
||||
|
||||
class AacEncoder extends CustomAudioEncoder {
|
||||
private worker: Worker | null = null;
|
||||
private nextMessageId = 0;
|
||||
private pendingMessages = new Map<number, {
|
||||
resolve: (value: WorkerResponseData) => void;
|
||||
reject: (reason?: unknown) => void;
|
||||
}>();
|
||||
|
||||
private ctx = 0;
|
||||
private encoderFrameSize = 0;
|
||||
private sampleRate = 0;
|
||||
private numberOfChannels = 0;
|
||||
private chunkMetadata: EncodedAudioChunkMetadata = {};
|
||||
private useAdts = false;
|
||||
private adtsHeaderTemplate: AdtsHeaderTemplate | null = null;
|
||||
private description: Uint8Array | null = null;
|
||||
|
||||
// Accumulate interleaved f32 samples until we have a full frame
|
||||
private pendingBuffer = new Float32Array(2 ** 16);
|
||||
private pendingFrames = 0;
|
||||
private nextSampleTimestampInSamples: number | null = null;
|
||||
private nextPacketTimestampInSamples: number | null = null;
|
||||
|
||||
static override supports(codec: AudioCodec, config: AudioEncoderConfig): boolean {
|
||||
return codec === 'aac'
|
||||
&& config.numberOfChannels >= 1
|
||||
&& config.numberOfChannels <= 8
|
||||
&& AAC_SAMPLE_RATES.includes(config.sampleRate)
|
||||
&& config.bitrate !== undefined;
|
||||
}
|
||||
|
||||
async init() {
|
||||
// eslint-disable-next-line @typescript-eslint/no-unsafe-call
|
||||
this.worker = (await createWorker()) as Worker;
|
||||
|
||||
const onMessage = (data: WorkerResponse) => {
|
||||
const pending = this.pendingMessages.get(data.id);
|
||||
assert(pending !== undefined);
|
||||
|
||||
this.pendingMessages.delete(data.id);
|
||||
if (data.success) {
|
||||
pending.resolve(data.data);
|
||||
} else {
|
||||
pending.reject(data.error);
|
||||
}
|
||||
};
|
||||
|
||||
if (this.worker.addEventListener) {
|
||||
this.worker.addEventListener('message', event => onMessage(event.data as WorkerResponse));
|
||||
} else {
|
||||
const nodeWorker = this.worker as unknown as {
|
||||
on: (event: string, listener: (data: never) => void) => void;
|
||||
};
|
||||
nodeWorker.on('message', onMessage);
|
||||
}
|
||||
|
||||
assert(this.config.bitrate !== undefined);
|
||||
this.sampleRate = this.config.sampleRate;
|
||||
this.numberOfChannels = this.config.numberOfChannels;
|
||||
|
||||
const result = await this.sendCommand({
|
||||
type: 'init',
|
||||
data: {
|
||||
numberOfChannels: this.config.numberOfChannels,
|
||||
sampleRate: this.config.sampleRate,
|
||||
bitrate: this.config.bitrate,
|
||||
},
|
||||
});
|
||||
|
||||
this.ctx = result.ctx;
|
||||
this.encoderFrameSize = result.frameSize;
|
||||
|
||||
// The ffmpeg encoder provides an AudioSpecificConfig as extradata after init
|
||||
const description = new Uint8Array(result.extradata);
|
||||
|
||||
const aacConfig = (this.config as { aac?: { format?: 'aac' | 'adts' } }).aac;
|
||||
this.useAdts = aacConfig?.format === 'adts';
|
||||
|
||||
if (this.useAdts) {
|
||||
const audioSpecificConfig = parseAacAudioSpecificConfig(description);
|
||||
this.adtsHeaderTemplate = buildAdtsHeaderTemplate(audioSpecificConfig);
|
||||
}
|
||||
|
||||
this.description = this.useAdts ? null : description;
|
||||
this.resetInternalState();
|
||||
}
|
||||
|
||||
private resetInternalState() {
|
||||
this.pendingFrames = 0;
|
||||
this.nextSampleTimestampInSamples = null;
|
||||
this.nextPacketTimestampInSamples = null;
|
||||
|
||||
this.chunkMetadata = {
|
||||
decoderConfig: {
|
||||
codec: 'mp4a.40.2',
|
||||
numberOfChannels: this.config.numberOfChannels,
|
||||
sampleRate: this.config.sampleRate,
|
||||
...(this.description ? { description: this.description } : {}),
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
async encode(audioSample: AudioSample) {
|
||||
if (this.nextSampleTimestampInSamples === null) {
|
||||
this.nextSampleTimestampInSamples = Math.round(audioSample.timestamp * this.sampleRate);
|
||||
this.nextPacketTimestampInSamples = this.nextSampleTimestampInSamples;
|
||||
}
|
||||
|
||||
const channels = this.numberOfChannels;
|
||||
const incomingFrames = audioSample.numberOfFrames;
|
||||
|
||||
// Extract interleaved f32 data
|
||||
const totalBytes = audioSample.allocationSize({ format: 'f32', planeIndex: 0 });
|
||||
const audioBytes = new Uint8Array(totalBytes);
|
||||
audioSample.copyTo(audioBytes, { format: 'f32', planeIndex: 0 });
|
||||
const incomingData = new Float32Array(audioBytes.buffer);
|
||||
|
||||
const requiredSamples = (this.pendingFrames + incomingFrames) * channels;
|
||||
if (requiredSamples > this.pendingBuffer.length) {
|
||||
let newSize = this.pendingBuffer.length;
|
||||
while (newSize < requiredSamples) {
|
||||
newSize *= 2;
|
||||
}
|
||||
const newBuffer = new Float32Array(newSize);
|
||||
newBuffer.set(this.pendingBuffer.subarray(0, this.pendingFrames * channels));
|
||||
this.pendingBuffer = newBuffer;
|
||||
}
|
||||
this.pendingBuffer.set(incomingData, this.pendingFrames * channels);
|
||||
this.pendingFrames += incomingFrames;
|
||||
|
||||
while (this.pendingFrames >= this.encoderFrameSize) {
|
||||
await this.encodeOneFrame();
|
||||
}
|
||||
}
|
||||
|
||||
async flush() {
|
||||
// Pad remaining samples with silence to fill a full frame
|
||||
if (this.pendingFrames > 0) {
|
||||
const channels = this.numberOfChannels;
|
||||
const frameSize = this.encoderFrameSize;
|
||||
const usedSamples = this.pendingFrames * channels;
|
||||
const frameSamples = frameSize * channels;
|
||||
|
||||
this.pendingBuffer.fill(0, usedSamples, frameSamples);
|
||||
this.pendingFrames = frameSize;
|
||||
|
||||
await this.encodeOneFrame();
|
||||
}
|
||||
|
||||
const result = await this.sendCommand({ type: 'flush', data: { ctx: this.ctx } });
|
||||
this.emitPackets(result.packets);
|
||||
|
||||
this.resetInternalState();
|
||||
}
|
||||
|
||||
close() {
|
||||
void this.sendCommand({ type: 'close', data: { ctx: this.ctx } });
|
||||
this.worker?.terminate();
|
||||
}
|
||||
|
||||
private async encodeOneFrame() {
|
||||
assert(this.nextSampleTimestampInSamples !== null);
|
||||
assert(this.nextPacketTimestampInSamples !== null);
|
||||
|
||||
const channels = this.numberOfChannels;
|
||||
const frameSize = this.encoderFrameSize;
|
||||
const frameSamples = frameSize * channels;
|
||||
|
||||
const frameData = this.pendingBuffer.slice(0, frameSamples);
|
||||
|
||||
// Shift remaining using copyWithin
|
||||
this.pendingFrames -= frameSize;
|
||||
if (this.pendingFrames > 0) {
|
||||
this.pendingBuffer.copyWithin(0, frameSamples, frameSamples + this.pendingFrames * channels);
|
||||
}
|
||||
|
||||
const audioData = frameData.buffer;
|
||||
const result = await this.sendCommand({
|
||||
type: 'encode',
|
||||
data: {
|
||||
ctx: this.ctx,
|
||||
audioData,
|
||||
timestamp: this.nextSampleTimestampInSamples,
|
||||
},
|
||||
}, [audioData]);
|
||||
|
||||
this.nextSampleTimestampInSamples += frameSize;
|
||||
|
||||
this.emitPackets(result.packets);
|
||||
}
|
||||
|
||||
private emitPackets(packets: Array<{ encodedData: ArrayBuffer; pts: number; duration: number }>) {
|
||||
assert(this.nextPacketTimestampInSamples !== null);
|
||||
|
||||
for (const p of packets) {
|
||||
let data = new Uint8Array(p.encodedData);
|
||||
|
||||
if (this.useAdts) {
|
||||
assert(this.adtsHeaderTemplate !== null);
|
||||
const { header, bitstream } = this.adtsHeaderTemplate;
|
||||
const frameLength = header.byteLength + data.byteLength;
|
||||
writeAdtsFrameLength(bitstream, frameLength);
|
||||
|
||||
const adtsFrame = new Uint8Array(frameLength);
|
||||
adtsFrame.set(header, 0);
|
||||
adtsFrame.set(data, header.byteLength);
|
||||
data = adtsFrame;
|
||||
}
|
||||
|
||||
const packet = new EncodedPacket(
|
||||
data,
|
||||
'key',
|
||||
this.nextPacketTimestampInSamples / this.sampleRate,
|
||||
p.duration / this.sampleRate,
|
||||
);
|
||||
|
||||
this.nextPacketTimestampInSamples += p.duration;
|
||||
|
||||
this.onPacket(
|
||||
packet,
|
||||
this.chunkMetadata,
|
||||
);
|
||||
|
||||
this.chunkMetadata = {};
|
||||
}
|
||||
}
|
||||
|
||||
private sendCommand<T extends string>(
|
||||
command: WorkerCommand & { type: T },
|
||||
transferables?: Transferable[],
|
||||
) {
|
||||
return new Promise<WorkerResponseData & { type: T }>((resolve, reject) => {
|
||||
const id = this.nextMessageId++;
|
||||
this.pendingMessages.set(id, {
|
||||
resolve: resolve as (value: WorkerResponseData) => void,
|
||||
reject,
|
||||
});
|
||||
|
||||
assert(this.worker);
|
||||
|
||||
if (transferables) {
|
||||
this.worker.postMessage({ id, command }, transferables);
|
||||
} else {
|
||||
this.worker.postMessage({ id, command });
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Registers the AAC encoder, which Mediabunny will then use automatically when applicable. Make sure to call this
|
||||
* function before starting any encoding task.
|
||||
*
|
||||
* Preferably, wrap the call in a condition to avoid overriding any native AAC encoder:
|
||||
*
|
||||
* ```ts
|
||||
* import { canEncodeAudio } from 'mediabunny';
|
||||
* import { registerAacEncoder } from '@mediabunny/aac-encoder';
|
||||
*
|
||||
* if (!(await canEncodeAudio('aac'))) {
|
||||
* registerAacEncoder();
|
||||
* }
|
||||
* ```
|
||||
*
|
||||
* @group \@mediabunny/aac-encoder
|
||||
* @public
|
||||
*/
|
||||
export const registerAacEncoder = () => {
|
||||
registerEncoder(AacEncoder);
|
||||
};
|
||||
|
||||
function assert(x: unknown): asserts x {
|
||||
if (!x) {
|
||||
throw new Error('Assertion failed.');
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,20 @@
|
||||
/*!
|
||||
* Copyright (c) 2026-present, Vanilagy and contributors
|
||||
*
|
||||
* 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/.
|
||||
*/
|
||||
|
||||
const AAC_ENCODER_LOADED_SYMBOL = Symbol.for('@mediabunny/aac-encoder loaded');
|
||||
if ((globalThis as Record<symbol, unknown>)[AAC_ENCODER_LOADED_SYMBOL]) {
|
||||
console.error(
|
||||
'[WARNING]\n@mediabunny/aac-encoder was loaded twice.'
|
||||
+ ' This will likely cause the encoder not to work correctly.'
|
||||
+ ' Check if multiple dependencies are importing different versions of @mediabunny/aac-encoder,'
|
||||
+ ' or if something is being bundled incorrectly.',
|
||||
);
|
||||
}
|
||||
(globalThis as Record<symbol, unknown>)[AAC_ENCODER_LOADED_SYMBOL] = true;
|
||||
|
||||
export { registerAacEncoder } from './encoder';
|
||||
@@ -0,0 +1,66 @@
|
||||
/*!
|
||||
* Copyright (c) 2026-present, Vanilagy and contributors
|
||||
*
|
||||
* 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/.
|
||||
*/
|
||||
|
||||
export type WorkerCommand = {
|
||||
type: 'init';
|
||||
data: {
|
||||
numberOfChannels: number;
|
||||
sampleRate: number;
|
||||
bitrate: number;
|
||||
};
|
||||
} | {
|
||||
type: 'encode';
|
||||
data: {
|
||||
ctx: number;
|
||||
audioData: ArrayBuffer;
|
||||
timestamp: number;
|
||||
};
|
||||
} | {
|
||||
type: 'flush';
|
||||
data: {
|
||||
ctx: number;
|
||||
};
|
||||
} | {
|
||||
type: 'close';
|
||||
data: {
|
||||
ctx: number;
|
||||
};
|
||||
};
|
||||
|
||||
export type WorkerResponseData = {
|
||||
type: 'init';
|
||||
ctx: number;
|
||||
frameSize: number;
|
||||
extradata: ArrayBuffer;
|
||||
} | {
|
||||
type: 'encode';
|
||||
packets: Array<{
|
||||
encodedData: ArrayBuffer;
|
||||
pts: number;
|
||||
duration: number;
|
||||
}>;
|
||||
} | {
|
||||
type: 'flush';
|
||||
packets: Array<{
|
||||
encodedData: ArrayBuffer;
|
||||
pts: number;
|
||||
duration: number;
|
||||
}>;
|
||||
} | {
|
||||
type: 'close';
|
||||
};
|
||||
|
||||
export type WorkerResponse = {
|
||||
id: number;
|
||||
} & ({
|
||||
success: true;
|
||||
data: WorkerResponseData;
|
||||
} | {
|
||||
success: false;
|
||||
error: unknown;
|
||||
});
|
||||
@@ -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" }
|
||||
]
|
||||
}
|
||||
@@ -0,0 +1,4 @@
|
||||
{
|
||||
"$schema": "https://developer.microsoft.com/json-schemas/tsdoc/v0/tsdoc.schema.json",
|
||||
"extends": ["../../tsdoc.json"]
|
||||
}
|
||||
@@ -17,7 +17,6 @@
|
||||
"include": [
|
||||
"./src/**/*",
|
||||
"./build/**/*",
|
||||
"../../shared/**/*",
|
||||
],
|
||||
"references": [
|
||||
{ "path": "../../src" }
|
||||
|
||||
Reference in New Issue
Block a user