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/* 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