mirror of
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Create @mediabunny/mp3-encoder, restructure and extend build system
This commit is contained in:
Vanilagy
@@ -0,0 +1 @@
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build/* linguist-generated
|
||||
@@ -0,0 +1,373 @@
|
||||
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 +1,32 @@
|
||||
Build
|
||||
|
||||
Compiling LAME:
|
||||
```
|
||||
emconfigure ./configure \
|
||||
CFLAGS="-DNDEBUG -DNO_STDIO -O3 -msimd128" \
|
||||
--disable-dependency-tracking \
|
||||
--disable-shared \
|
||||
--disable-gtktest \
|
||||
--disable-analyzer-hooks \
|
||||
--disable-decoder \
|
||||
--disable-frontend
|
||||
|
||||
emmake make clean
|
||||
emmake make
|
||||
```
|
||||
|
||||
Then extract the file `libmp3lame/.libs/libmp3lame.a`, which you'll need to build the LAME bridge.
|
||||
|
||||
Compiling the LAME bridge:
|
||||
```
|
||||
emcc src/lame-bridge.c build/libmp3lame.a \
|
||||
-s MODULARIZE=1 \
|
||||
-s EXPORT_ES6=1 \
|
||||
-s SINGLE_FILE=1 \
|
||||
-s ENVIRONMENT=web,worker \
|
||||
-s EXPORTED_RUNTIME_METHODS=cwrap,HEAPU8 \
|
||||
-s EXPORTED_FUNCTIONS=_malloc,_free \
|
||||
-msimd128 \
|
||||
-O3 \
|
||||
-o build/lame.js
|
||||
```
|
||||
@@ -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-mp3-encoder.d.ts"
|
||||
},
|
||||
"tsdocMetadata": {
|
||||
"enabled": false
|
||||
},
|
||||
"messages": {
|
||||
"compilerMessageReporting": {
|
||||
"default": {
|
||||
"logLevel": "warning"
|
||||
}
|
||||
},
|
||||
"extractorMessageReporting": {
|
||||
"default": {
|
||||
"logLevel": "warning"
|
||||
}
|
||||
},
|
||||
"tsdocMessageReporting": {
|
||||
"default": {
|
||||
"logLevel": "warning"
|
||||
}
|
||||
}
|
||||
},
|
||||
"newlineKind": "lf"
|
||||
}
|
||||
Generated
+2
File diff suppressed because one or more lines are too long
Generated
BIN
Binary file not shown.
Executable
+1342
File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,26 @@
|
||||
{
|
||||
"name": "@mediabunny/mp3-encoder",
|
||||
"version": "0.0.1",
|
||||
"main": "./dist/bundles/mediabunny-mp3-encoder.mjs",
|
||||
"module": "./dist/bundles/mediabunny-mp3-encoder.mjs",
|
||||
"types": "./dist/modules/src/index.d.ts",
|
||||
"exports": {
|
||||
"types": "./dist/modules/src/index.d.ts",
|
||||
"import": "./dist/bundles/mediabunny-mp3-encoder.mjs",
|
||||
"require": "./dist/bundles/mediabunny-mp3-encoder.mjs"
|
||||
},
|
||||
"files": [
|
||||
"README.md",
|
||||
"package.json",
|
||||
"LICENSE",
|
||||
"dist",
|
||||
"src"
|
||||
],
|
||||
"sideEffects": false,
|
||||
"peerDependencies": {
|
||||
"mediabunny": "^1.0.0"
|
||||
},
|
||||
"devDependencies": {
|
||||
"@types/emscripten": "^1.40.1"
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,212 @@
|
||||
/*!
|
||||
* Copyright (c) 2025-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/lame';
|
||||
import type { WorkerCommand, WorkerResponse, WorkerResponseData } from './shared';
|
||||
|
||||
type ExtendedEmscriptenModule = EmscriptenModule & {
|
||||
cwrap: typeof cwrap;
|
||||
};
|
||||
|
||||
let module: ExtendedEmscriptenModule;
|
||||
let lamePtr: number;
|
||||
let storedNumberOfChannels: number;
|
||||
let storedSampleRate: number;
|
||||
let storedBitrate: number;
|
||||
let needsReset = false;
|
||||
|
||||
let initLame: (
|
||||
numberOfChannels: number,
|
||||
sampleRate: number,
|
||||
bitrate: number
|
||||
) => number;
|
||||
let encodeSamples: (
|
||||
lame: number,
|
||||
leftPtr: number,
|
||||
rightPtr: number,
|
||||
sampleCount: number,
|
||||
outputPtr: number,
|
||||
outputSize: number
|
||||
) => number;
|
||||
let flushLame: (lame: number, outputPtr: number, outputSize: number) => number;
|
||||
let closeLame: (lame: number) => void;
|
||||
|
||||
let inputSlice: Slice | null = null;
|
||||
let outputSlice: Slice | null = null;
|
||||
|
||||
const init = async (numberOfChannels: number, sampleRate: number, bitrate: number) => {
|
||||
storedNumberOfChannels = numberOfChannels;
|
||||
storedSampleRate = sampleRate;
|
||||
storedBitrate = bitrate;
|
||||
|
||||
module = (await createModule()) as ExtendedEmscriptenModule;
|
||||
|
||||
// Set up the functions
|
||||
initLame = module.cwrap('init_lame', 'number', ['number', 'number', 'number']);
|
||||
encodeSamples = module.cwrap(
|
||||
'encode_samples',
|
||||
'number',
|
||||
['number', 'number', 'number', 'number', 'number', 'number'],
|
||||
);
|
||||
flushLame = module.cwrap('flush_lame', 'number', ['number', 'number', 'number']);
|
||||
closeLame = module.cwrap('close_lame', null, ['number']);
|
||||
|
||||
lamePtr = initLame(numberOfChannels, sampleRate, bitrate);
|
||||
};
|
||||
|
||||
const reset = () => {
|
||||
closeLame(lamePtr);
|
||||
lamePtr = initLame(storedNumberOfChannels, storedSampleRate, storedBitrate);
|
||||
};
|
||||
|
||||
const encode = (audioData: ArrayBuffer, numberOfFrames: number) => {
|
||||
if (needsReset) {
|
||||
reset();
|
||||
needsReset = false;
|
||||
}
|
||||
|
||||
const audioBytes = new Uint8Array(audioData);
|
||||
const sizePerChannel = audioBytes.length / storedNumberOfChannels;
|
||||
|
||||
inputSlice = maybeGrowSlice(inputSlice, audioBytes.length);
|
||||
module.HEAPU8.set(audioBytes, inputSlice.ptr);
|
||||
|
||||
const requiredOutputSize = Math.ceil(1.25 * numberOfFrames + 7200);
|
||||
outputSlice = maybeGrowSlice(outputSlice, requiredOutputSize);
|
||||
|
||||
const bytesWritten = encodeSamples(
|
||||
lamePtr,
|
||||
inputSlice.ptr,
|
||||
inputSlice.ptr + (storedNumberOfChannels - 1) * sizePerChannel,
|
||||
numberOfFrames,
|
||||
outputSlice.ptr,
|
||||
requiredOutputSize,
|
||||
);
|
||||
|
||||
const result = module.HEAPU8.slice(outputSlice.ptr, outputSlice.ptr + bytesWritten);
|
||||
return result.buffer;
|
||||
};
|
||||
|
||||
const flush = () => {
|
||||
if (needsReset) {
|
||||
reset();
|
||||
needsReset = false;
|
||||
}
|
||||
|
||||
const requiredOutputSize = 7200;
|
||||
outputSlice = maybeGrowSlice(outputSlice, requiredOutputSize);
|
||||
|
||||
const bytesWritten = flushLame(lamePtr, outputSlice.ptr, requiredOutputSize);
|
||||
|
||||
const result = module.HEAPU8.slice(outputSlice.ptr, outputSlice.ptr + bytesWritten);
|
||||
needsReset = true; // After a flush, the encoder must be prepared to start a new encoding process
|
||||
|
||||
return result.buffer;
|
||||
};
|
||||
|
||||
/** A "fat pointer" type thing. */
|
||||
type Slice = {
|
||||
ptr: number;
|
||||
size: number;
|
||||
};
|
||||
|
||||
/** Either returns the existing slice, or allocates a new one if there's no existing slice or it was too small. */
|
||||
const maybeGrowSlice = (slice: Slice | null, requiredSize: number) => {
|
||||
if (!slice || slice.size < requiredSize) {
|
||||
if (slice) {
|
||||
module._free(slice.ptr);
|
||||
}
|
||||
|
||||
return {
|
||||
ptr: module._malloc(requiredSize),
|
||||
size: requiredSize,
|
||||
};
|
||||
}
|
||||
|
||||
return slice;
|
||||
};
|
||||
|
||||
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': {
|
||||
await init(
|
||||
command.data.numberOfChannels,
|
||||
command.data.sampleRate,
|
||||
command.data.bitrate,
|
||||
);
|
||||
result = { success: true };
|
||||
}; break;
|
||||
|
||||
case 'encode': {
|
||||
const encodedData = encode(
|
||||
command.data.audioData,
|
||||
command.data.numberOfFrames,
|
||||
);
|
||||
result = { encodedData };
|
||||
transferables.push(encodedData);
|
||||
}; break;
|
||||
|
||||
case 'flush': {
|
||||
const flushedData = flush();
|
||||
result = { flushedData };
|
||||
transferables.push(flushedData);
|
||||
}; break;
|
||||
}
|
||||
|
||||
const response: WorkerResponse = {
|
||||
id,
|
||||
success: true,
|
||||
data: result,
|
||||
};
|
||||
sendMessage(response, transferables);
|
||||
} catch (error) {
|
||||
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') {
|
||||
// We're in Node.js (or a runtime that mimics it)
|
||||
const workerModule = 'worker_threads';
|
||||
// eslint-disable-next-line @stylistic/max-len
|
||||
// eslint-disable-next-line @typescript-eslint/no-require-imports, @typescript-eslint/no-unsafe-assignment, @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 +1,211 @@
|
||||
/*!
|
||||
* Copyright (c) 2025-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 { CustomAudioEncoder, AudioCodec, AudioSample, EncodedPacket, registerEncoder } from 'mediabunny';
|
||||
import { FRAME_HEADER_SIZE, readFrameHeader } from '../../../shared/mp3-misc';
|
||||
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';
|
||||
|
||||
class Mp3Encoder extends CustomAudioEncoder {
|
||||
private worker!: Worker;
|
||||
private nextMessageId = 0;
|
||||
private pendingMessages = new Map<number, {
|
||||
resolve: (value: WorkerResponseData) => void;
|
||||
reject: (reason?: unknown) => void;
|
||||
}>();
|
||||
|
||||
private buffer = new Uint8Array(2 ** 16);
|
||||
private currentBufferOffset = 0;
|
||||
private currentTimestamp = 0;
|
||||
private chunkMetadata!: EncodedAudioChunkMetadata;
|
||||
|
||||
static override supports(codec: AudioCodec, config: AudioDecoderConfig): boolean {
|
||||
return codec === 'mp3'
|
||||
&& (config.numberOfChannels === 1 || config.numberOfChannels === 2)
|
||||
&& (config.sampleRate === 32000 || config.sampleRate === 44100 || config.sampleRate === 48000);
|
||||
}
|
||||
|
||||
async init() {
|
||||
// eslint-disable-next-line @typescript-eslint/no-unsafe-call
|
||||
this.worker = (await createWorker()) as Worker; // The actual encoding takes place in this 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);
|
||||
|
||||
await this.sendCommand({
|
||||
type: 'init',
|
||||
data: {
|
||||
numberOfChannels: this.config.numberOfChannels,
|
||||
sampleRate: this.config.sampleRate,
|
||||
bitrate: this.config.bitrate,
|
||||
},
|
||||
});
|
||||
|
||||
this.chunkMetadata = {
|
||||
decoderConfig: {
|
||||
codec: 'mp3',
|
||||
numberOfChannels: this.config.numberOfChannels,
|
||||
sampleRate: this.config.sampleRate,
|
||||
},
|
||||
};
|
||||
}
|
||||
|
||||
async encode(audioSample: AudioSample) {
|
||||
const sizePerChannel = audioSample.allocationSize({
|
||||
format: 's16-planar',
|
||||
planeIndex: 0,
|
||||
});
|
||||
|
||||
const requiredBytes = audioSample.numberOfChannels * sizePerChannel;
|
||||
const audioData = new ArrayBuffer(requiredBytes);
|
||||
const audioBytes = new Uint8Array(audioData);
|
||||
|
||||
for (let i = 0; i < audioSample.numberOfChannels; i++) {
|
||||
audioSample.copyTo(audioBytes.subarray(i * sizePerChannel), {
|
||||
format: 's16-planar', // LAME wants it in this format
|
||||
planeIndex: i,
|
||||
});
|
||||
}
|
||||
|
||||
const result = await this.sendCommand({
|
||||
type: 'encode',
|
||||
data: {
|
||||
audioData,
|
||||
numberOfFrames: audioSample.numberOfFrames,
|
||||
},
|
||||
}, [audioData]);
|
||||
|
||||
assert('encodedData' in result);
|
||||
this.digestOutput(new Uint8Array(result.encodedData));
|
||||
}
|
||||
|
||||
async flush() {
|
||||
const result = await this.sendCommand({ type: 'flush' });
|
||||
|
||||
assert('flushedData' in result);
|
||||
this.digestOutput(new Uint8Array(result.flushedData));
|
||||
}
|
||||
|
||||
close() {
|
||||
this.worker.terminate();
|
||||
}
|
||||
|
||||
/**
|
||||
* LAME returns data in chunks, but a chunk doesn't need to contain a full MP3 frame. Therefore, we must accumulate
|
||||
* these chunks and extract the MP3 frames only when they're complete.
|
||||
*/
|
||||
private digestOutput(bytes: Uint8Array) {
|
||||
const requiredBufferSize = this.currentBufferOffset + bytes.length;
|
||||
if (requiredBufferSize > this.buffer.length) {
|
||||
// Grow the buffer to the required size
|
||||
const newSize = 1 << Math.ceil(Math.log2(requiredBufferSize));
|
||||
const newBuffer = new Uint8Array(newSize);
|
||||
newBuffer.set(this.buffer);
|
||||
this.buffer = newBuffer;
|
||||
}
|
||||
|
||||
this.buffer.set(bytes, this.currentBufferOffset);
|
||||
this.currentBufferOffset = requiredBufferSize;
|
||||
|
||||
let pos = 0;
|
||||
while (pos <= this.currentBufferOffset - FRAME_HEADER_SIZE) {
|
||||
const word = new DataView(this.buffer.buffer).getUint32(pos, false);
|
||||
const header = readFrameHeader(word, { pos, fileSize: null });
|
||||
if (!header) {
|
||||
break;
|
||||
}
|
||||
|
||||
const fits = header.totalSize <= this.currentBufferOffset - pos;
|
||||
if (!fits) {
|
||||
// The frame isn't complete yet
|
||||
break;
|
||||
}
|
||||
|
||||
const data = this.buffer.slice(pos, pos + header.totalSize);
|
||||
const duration = header.audioSamplesInFrame / header.sampleRate;
|
||||
this.onPacket(new EncodedPacket(data, 'key', this.currentTimestamp, duration), this.chunkMetadata);
|
||||
|
||||
if (this.currentTimestamp === 0) {
|
||||
this.chunkMetadata = {}; // Mimic WebCodecs-like behavior
|
||||
}
|
||||
|
||||
this.currentTimestamp += duration;
|
||||
pos += header.totalSize;
|
||||
}
|
||||
|
||||
if (pos > 0) {
|
||||
// Shift the data
|
||||
this.buffer.set(this.buffer.subarray(pos, this.currentBufferOffset), 0);
|
||||
this.currentBufferOffset -= pos;
|
||||
}
|
||||
}
|
||||
|
||||
private sendCommand(
|
||||
command: WorkerCommand,
|
||||
transferables?: Transferable[],
|
||||
) {
|
||||
return new Promise<WorkerResponseData>((resolve, reject) => {
|
||||
const id = this.nextMessageId++;
|
||||
this.pendingMessages.set(id, { resolve, reject });
|
||||
|
||||
if (transferables) {
|
||||
this.worker.postMessage({ id, command }, transferables);
|
||||
} else {
|
||||
this.worker.postMessage({ id, command });
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Registers the LAME MP3 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 MP3 encoder:
|
||||
*
|
||||
* ```ts
|
||||
* import { canEncodeAudio } from 'mediabunny';
|
||||
* import { registerMp3Encoder } from '@mediabunny/mp3-encoder';
|
||||
*
|
||||
* if (!(await canEncodeAudio('mp3'))) {
|
||||
* registerMp3Encoder();
|
||||
* }
|
||||
* ```
|
||||
*
|
||||
* @public
|
||||
*/
|
||||
export const registerMp3Encoder = () => {
|
||||
registerEncoder(Mp3Encoder);
|
||||
};
|
||||
|
||||
function assert(x: unknown): asserts x {
|
||||
if (!x) {
|
||||
throw new Error('Assertion failed.');
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,40 @@
|
||||
/*!
|
||||
* Copyright (c) 2025-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 "../lib/lame.h"
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
lame_global_flags *init_lame(int number_of_channels, int sample_rate, int bitrate) {
|
||||
lame_global_flags *gfp = lame_init();
|
||||
|
||||
lame_set_num_channels(gfp, number_of_channels);
|
||||
lame_set_in_samplerate(gfp, sample_rate);
|
||||
lame_set_out_samplerate(gfp, sample_rate);
|
||||
lame_set_brate(gfp, bitrate / 1000); // MP3 wants "kilobitrate"
|
||||
lame_set_bWriteVbrTag(gfp, 0);
|
||||
|
||||
int ret_code = lame_init_params(gfp);
|
||||
|
||||
return gfp;
|
||||
}
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
int encode_samples(lame_global_flags *gfp, short int left_buf[], short int right_buf[], int sample_count, unsigned char *dest_buf, int dest_buf_size) {
|
||||
return lame_encode_buffer(gfp, left_buf, right_buf, sample_count, dest_buf, dest_buf_size);
|
||||
}
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
int flush_lame(lame_global_flags *gfp, unsigned char *dest_buf, int dest_buf_size) {
|
||||
return lame_encode_flush(gfp, dest_buf, dest_buf_size);
|
||||
}
|
||||
|
||||
EMSCRIPTEN_KEEPALIVE
|
||||
void close_lame(lame_global_flags *gfp) {
|
||||
lame_close(gfp);
|
||||
}
|
||||
@@ -0,0 +1,42 @@
|
||||
/*!
|
||||
* Copyright (c) 2025-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: {
|
||||
audioData: ArrayBuffer;
|
||||
numberOfFrames: number;
|
||||
};
|
||||
} | {
|
||||
type: 'flush';
|
||||
};
|
||||
|
||||
export type WorkerResponseData = {
|
||||
success: boolean;
|
||||
} | {
|
||||
encodedData: ArrayBuffer;
|
||||
} | {
|
||||
flushedData: ArrayBuffer;
|
||||
};
|
||||
|
||||
export type WorkerResponse = {
|
||||
id: number;
|
||||
} & ({
|
||||
success: true;
|
||||
data: WorkerResponseData;
|
||||
} | {
|
||||
success: false;
|
||||
error: unknown;
|
||||
});
|
||||
@@ -0,0 +1,23 @@
|
||||
{
|
||||
"extends": "../../../tsconfig.json",
|
||||
"compilerOptions": {
|
||||
"outDir": "../dist/modules",
|
||||
"declaration": true,
|
||||
"declarationMap": true,
|
||||
"stripInternal": true,
|
||||
"noEmit": false,
|
||||
"moduleResolution": "nodenext",
|
||||
"module": "nodenext",
|
||||
"allowJs": true,
|
||||
"paths": {
|
||||
"mediabunny": ["../../../src/index.ts"],
|
||||
},
|
||||
},
|
||||
"include": [
|
||||
"**/*",
|
||||
"../../../shared/**/*"
|
||||
],
|
||||
"references": [
|
||||
{ "path": "../../../src" }
|
||||
]
|
||||
}
|
||||
Reference in New Issue
Block a user