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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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Add m-esr52 at 52.6.0
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+/* -*- 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 ISOMediaWriter_h_
+#define ISOMediaWriter_h_
+
+#include "ContainerWriter.h"
+#include "nsAutoPtr.h"
+#include "nsIRunnable.h"
+
+namespace mozilla {
+
+class ISOControl;
+class FragmentBuffer;
+
+class ISOMediaWriter : public ContainerWriter
+{
+public:
+ // Generate an fragmented MP4 stream, ISO/IEC 14496-12.
+ // Brand names in 'ftyp' box are 'isom' and 'mp42'.
+ const static uint32_t TYPE_FRAG_MP4 = 1 << 0;
+
+ // Generate an fragmented 3GP stream, 3GPP TS 26.244,
+ // '5.4.3 Basic profile'.
+ // Brand names in 'ftyp' box are '3gp9' and 'isom'.
+ const static uint32_t TYPE_FRAG_3GP = 1 << 1;
+
+ // Generate an fragmented 3G2 stream, 3GPP2 C.S0050-B
+ // Brand names in 'ftyp' box are '3g2c' and 'isom'
+ const static uint32_t TYPE_FRAG_3G2 = 1 << 2;
+
+ // aType is the combination of CREATE_AUDIO_TRACK and CREATE_VIDEO_TRACK.
+ // It is a hint to muxer that the output streaming contains audio, video
+ // or both.
+ //
+ // aHint is one of the value in TYPE_XXXXXXXX. It is a hint to muxer what kind
+ // of ISO format should be generated.
+ ISOMediaWriter(uint32_t aType, uint32_t aHint = TYPE_FRAG_MP4);
+ ~ISOMediaWriter();
+
+ // ContainerWriter methods
+ nsresult WriteEncodedTrack(const EncodedFrameContainer &aData,
+ uint32_t aFlags = 0) override;
+
+ nsresult GetContainerData(nsTArray<nsTArray<uint8_t>>* aOutputBufs,
+ uint32_t aFlags = 0) override;
+
+ nsresult SetMetadata(TrackMetadataBase* aMetadata) override;
+
+protected:
+ /**
+ * The state of each state will generate one or more blob.
+ * Each blob will be a moov, moof, moof... until receiving EOS.
+ * The generated sequence is:
+ *
+ * moov -> moof -> moof -> ... -> moof -> moof
+ *
+ * Following is the details of each state.
+ * MUXING_HEAD:
+ * It collects the metadata to generate a moov. The state transits to
+ * MUXING_HEAD after output moov blob.
+ *
+ * MUXING_FRAG:
+ * It collects enough audio/video data to generate a fragment blob. This
+ * will be repeated until END_OF_STREAM and then transiting to MUXING_DONE.
+ *
+ * MUXING_DONE:
+ * End of ISOMediaWriter life cycle.
+ */
+ enum MuxState {
+ MUXING_HEAD,
+ MUXING_FRAG,
+ MUXING_DONE,
+ };
+
+private:
+ nsresult RunState();
+
+ // True if one of following conditions hold:
+ // 1. Audio/Video accumulates enough data to generate a moof.
+ // 2. Get EOS signal.
+ // aEOS will be assigned to true if it gets EOS signal.
+ bool ReadyToRunState(bool& aEOS);
+
+ // The main class to generate and iso box. Its life time is same as
+ // ISOMediaWriter and deleted only if ISOMediaWriter is destroyed.
+ nsAutoPtr<ISOControl> mControl;
+
+ // Buffers to keep audio/video data frames, they are created when metadata is
+ // received. Only one instance for each media type is allowed and they will be
+ // deleted only if ISOMediaWriter is destroyed.
+ nsAutoPtr<FragmentBuffer> mAudioFragmentBuffer;
+ nsAutoPtr<FragmentBuffer> mVideoFragmentBuffer;
+
+ MuxState mState;
+
+ // A flag to indicate the output buffer is ready to blob out.
+ bool mBlobReady;
+
+ // Combination of Audio_Track or Video_Track.
+ uint32_t mType;
+};
+
+} // namespace mozilla
+
+#endif // ISOMediaWriter_h_