зеркало из https://github.com/mozilla/gecko-dev.git
42 строки
1.3 KiB
C++
42 строки
1.3 KiB
C++
/* 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 STREAM_H_
|
|
#define STREAM_H_
|
|
|
|
#include "DecoderDoctorLogger.h"
|
|
#include "nsISupportsImpl.h"
|
|
|
|
namespace mozilla {
|
|
|
|
DDLoggedTypeDeclName(ByteStream);
|
|
|
|
class ByteStream : public DecoderDoctorLifeLogger<ByteStream> {
|
|
public:
|
|
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(ByteStream);
|
|
|
|
virtual bool ReadAt(int64_t offset, void* data, size_t size,
|
|
size_t* bytes_read) = 0;
|
|
virtual bool CachedReadAt(int64_t offset, void* data, size_t size,
|
|
size_t* bytes_read) = 0;
|
|
virtual bool Length(int64_t* size) = 0;
|
|
|
|
virtual void DiscardBefore(int64_t offset) {}
|
|
|
|
// If this ByteStream's underlying storage of media is in-memory, this
|
|
// function returns a pointer to the in-memory storage of data at offset.
|
|
// Note that even if a ByteStream stores data in memory, it may not be
|
|
// stored contiguously, in which case this returns nullptr.
|
|
virtual const uint8_t* GetContiguousAccess(int64_t aOffset, size_t aSize) {
|
|
return nullptr;
|
|
}
|
|
|
|
protected:
|
|
virtual ~ByteStream() = default;
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif
|