1 /* This Source Code Form is subject to the terms of the Mozilla Public
2  * License, v. 2.0. If a copy of the MPL was not distributed with this
3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
4 
5 #ifndef BUFFER_STREAM_H_
6 #define BUFFER_STREAM_H_
7 
8 #include "ByteStream.h"
9 #include "nsTArray.h"
10 #include "MediaResource.h"
11 
12 namespace mozilla {
13 class MediaByteBuffer;
14 
15 DDLoggedTypeDeclNameAndBase(BufferStream, ByteStream);
16 
17 class BufferStream : public ByteStream,
18                      public mozilla::DecoderDoctorLifeLogger<BufferStream> {
19  public:
20   /* BufferStream does not take ownership of aData nor does it make a copy.
21    * Therefore BufferStream shouldn't get used after aData is destroyed.
22    */
23   BufferStream();
24   explicit BufferStream(mozilla::MediaByteBuffer* aBuffer);
25 
26   virtual bool ReadAt(int64_t aOffset, void* aData, size_t aLength,
27                       size_t* aBytesRead) override;
28   virtual bool CachedReadAt(int64_t aOffset, void* aData, size_t aLength,
29                             size_t* aBytesRead) override;
30   virtual bool Length(int64_t* aLength) override;
31 
32   virtual void DiscardBefore(int64_t aOffset) override;
33 
34   bool AppendBytes(const uint8_t* aData, size_t aLength);
35 
36   mozilla::MediaByteRange GetByteRange();
37 
38  private:
39   ~BufferStream();
40   int64_t mStartOffset;
41   RefPtr<mozilla::MediaByteBuffer> mData;
42 };
43 }  // namespace mozilla
44 
45 #endif
46