/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim:set ts=2 sw=2 sts=2 et cindent: */ /* 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/. */ #if !defined(RtspMediaCodecReader_h_) #define RtspMediaCodecReader_h_ #include "MediaCodecReader.h" namespace mozilla { namespace dom { class TimeRanges; } class AbstractMediaDecoder; class RtspMediaResource; /* RtspMediaCodecReader is a subclass of MediaCodecReader. * The major reason that RtspMediaCodecReader inherit from MediaCodecReader is * the same video/audio decoding logic we can reuse. */ class RtspMediaCodecReader MOZ_FINAL : public MediaCodecReader { protected: // Provide a Rtsp extractor. virtual bool CreateExtractor() MOZ_OVERRIDE; // Ensure the play command is sent to Rtsp server. void EnsureActive(); public: RtspMediaCodecReader(AbstractMediaDecoder* aDecoder); virtual ~RtspMediaCodecReader(); // Implement a time-based seek instead of byte-based. virtual void Seek(int64_t aTime, int64_t aStartTime, int64_t aEndTime, int64_t aCurrentTime) MOZ_OVERRIDE; // Override GetBuffered() to do nothing for below reasons: // 1. Because the Rtsp stream is a/v separated. The buffered data in a/v // tracks are not consistent with time stamp. // For example: audio buffer: 1~2s, video buffer: 1.5~2.5s // 2. Since the Rtsp is a realtime streaming, the buffer we made for // RtspMediaResource is quite small. The small buffer implies the time ranges // we returned are not useful for the MediaDecodeStateMachine. Unlike the // ChannelMediaResource, it has a "cache" that can store the whole streaming // data so the |GetBuffered| function can retrieve useful time ranges. virtual nsresult GetBuffered(dom::TimeRanges* aBuffered, int64_t aStartTime) MOZ_OVERRIDE { return NS_OK; } virtual void SetIdle() MOZ_OVERRIDE; // Disptach a DecodeVideoFrameTask to decode video data. virtual void RequestVideoData(bool aSkipToNextKeyframe, int64_t aTimeThreshold) MOZ_OVERRIDE; // Disptach a DecodeAudioDataTask to decode audio data. virtual void RequestAudioData() MOZ_OVERRIDE; virtual nsresult ReadMetadata(MediaInfo* aInfo, MetadataTags** aTags) MOZ_OVERRIDE; private: // A pointer to RtspMediaResource for calling the Rtsp specific function. // The lifetime of mRtspResource is controlled by MediaDecoder. MediaDecoder // holds the MediaDecoderStateMachine and RtspMediaResource. // And MediaDecoderStateMachine holds this RtspMediaCodecReader. RtspMediaResource* mRtspResource; }; } // namespace mozilla #endif