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