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85 lines
3.0 KiB
C++
85 lines
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#if !defined(RtspOmxReader_h_)
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#define RtspOmxReader_h_
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#include "MediaResource.h"
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#include "MediaDecoderReader.h"
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#include "MediaOmxReader.h"
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namespace mozilla {
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namespace dom {
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class TimeRanges;
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}
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class AbstractMediaDecoder;
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class RtspMediaResource;
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/* RtspOmxReader is a subclass of MediaOmxReader.
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* The major reason that RtspOmxReader inherit from MediaOmxReader is the
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* same video/audio decoding logic we can reuse.
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*/
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class RtspOmxReader : public MediaOmxReader
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{
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protected:
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// Provide a Rtsp extractor.
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nsresult InitOmxDecoder() MOZ_FINAL MOZ_OVERRIDE;
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public:
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RtspOmxReader(AbstractMediaDecoder* aDecoder)
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: MediaOmxReader(aDecoder) {
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MOZ_COUNT_CTOR(RtspOmxReader);
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NS_ASSERTION(mDecoder, "RtspOmxReader mDecoder is null.");
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NS_ASSERTION(mDecoder->GetResource(),
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"RtspOmxReader mDecoder->GetResource() is null.");
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mRtspResource = mDecoder->GetResource()->GetRtspPointer();
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MOZ_ASSERT(mRtspResource);
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}
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virtual ~RtspOmxReader() MOZ_OVERRIDE {
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MOZ_COUNT_DTOR(RtspOmxReader);
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}
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// Implement a time-based seek instead of byte-based..
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virtual nsresult Seek(int64_t aTime, int64_t aStartTime, int64_t aEndTime,
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int64_t aCurrentTime) MOZ_FINAL MOZ_OVERRIDE;
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// Override GetBuffered() to do nothing for below reasons:
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// 1. Because the Rtsp stream is a/v separated. The buffered data in a/v
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// tracks are not consistent with time stamp.
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// For example: audio buffer: 1~2s, video buffer: 1.5~2.5s
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// 2. Since the Rtsp is a realtime streaming, the buffer we made for
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// RtspMediaResource is quite small. The small buffer implies the time ranges
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// we returned are not useful for the MediaDecodeStateMachine. Unlike the
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// ChannelMediaResource, it has a "cache" that can store the whole streaming
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// data so the |GetBuffered| function can retrieve useful time ranges.
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virtual nsresult GetBuffered(mozilla::dom::TimeRanges* aBuffered,
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int64_t aStartTime) MOZ_FINAL MOZ_OVERRIDE {
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return NS_OK;
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}
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// Override FindStartTime() to return null pointer.
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// For Rtsp, we don't have the first video frame in DECODING_METADATA state.
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// It will be available until player request Play() and media decoder enters
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// DECODING state.
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virtual VideoData* FindStartTime(int64_t& aOutStartTime)
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MOZ_FINAL MOZ_OVERRIDE {
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return nullptr;
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}
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private:
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// A pointer to RtspMediaResource for calling the Rtsp specific function.
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// The lifetime of mRtspResource is controlled by MediaDecoder. MediaDecoder
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// holds the MediaDecoderStateMachine and RtspMediaResource.
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// And MediaDecoderStateMachine holds this RtspOmxReader.
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RtspMediaResource* mRtspResource;
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};
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} // namespace mozilla
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#endif
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