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-rw-r--r--dom/media/mp4/ByteStream.h41
1 files changed, 41 insertions, 0 deletions
diff --git a/dom/media/mp4/ByteStream.h b/dom/media/mp4/ByteStream.h
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+++ b/dom/media/mp4/ByteStream.h
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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