63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_image_encoders_webp_nsWebPEncoder_h
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#define mozilla_image_encoders_webp_nsWebPEncoder_h
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#include "webp/encode.h"
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#include "imgIEncoder.h"
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#include "nsCOMPtr.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/ReentrantMonitor.h"
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#define NS_WEBPENCODER_CID \
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{/* a8e5a8e5-bebf-4512-9f50-e41e4748ce28 */ \
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0xa8e5a8e5, \
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0xbebf, \
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0x4512, \
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{0x9f, 0x50, 0xe4, 0x1e, 0x47, 0x48, 0xce, 0x28}}
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// Provides WEBP encoding functionality. Use InitFromData() to do the
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// encoding. See that function definition for encoding options.
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class nsWebPEncoder final : public imgIEncoder {
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typedef mozilla::ReentrantMonitor ReentrantMonitor;
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_IMGIENCODER
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NS_DECL_NSIINPUTSTREAM
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NS_DECL_NSIASYNCINPUTSTREAM
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nsWebPEncoder();
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protected:
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~nsWebPEncoder();
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void NotifyListener();
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bool mFinished;
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// image buffer
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uint8_t* mImageBuffer;
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uint32_t mImageBufferSize;
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uint32_t mImageBufferUsed;
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uint32_t mImageBufferReadPoint;
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nsCOMPtr<nsIInputStreamCallback> mCallback;
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nsCOMPtr<nsIEventTarget> mCallbackTarget;
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uint32_t mNotifyThreshold;
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// nsWebPEncoder is designed to allow one thread to pump data into it while
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// another reads from it. We lock to ensure that the buffer remains
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// append-only while we read from it (that it is not realloced) and to
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// ensure that only one thread dispatches a callback for each call to
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// AsyncWait.
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ReentrantMonitor mReentrantMonitor MOZ_UNANNOTATED;
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};
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#endif // mozilla_image_encoders_webp_nsWebPEncoder_h
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