99 lines
3.1 KiB
C++
99 lines
3.1 KiB
C++
/*
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* Copyright 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef NUPLAYER_CCDECODER_H_
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#define NUPLAYER_CCDECODER_H_
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#include "NuPlayer.h"
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namespace android {
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struct NuPlayer::CCDecoder : public RefBase {
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enum {
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kWhatClosedCaptionData,
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kWhatTrackAdded,
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};
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enum {
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kTrackTypeCEA608,
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kTrackTypeCEA708,
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};
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explicit CCDecoder(const sp<AMessage> ¬ify);
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size_t getTrackCount() const;
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sp<AMessage> getTrackInfo(size_t index) const;
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status_t selectTrack(size_t index, bool select);
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ssize_t getSelectedTrack(media_track_type type) const;
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bool isSelected() const;
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void decode(const sp<ABuffer> &accessUnit);
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void display(int64_t timeUs);
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void flush();
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private:
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// CC track identifier.
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struct CCTrack {
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CCTrack() : mTrackType(0), mTrackChannel(0) { }
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CCTrack(const int32_t trackType, const size_t trackChannel)
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: mTrackType(trackType), mTrackChannel(trackChannel) { }
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int32_t mTrackType;
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size_t mTrackChannel;
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// The ordering of CCTracks is to build a map of track to index.
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// It is necessary to find the index of the matched CCTrack when CC data comes.
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int compare(const NuPlayer::CCDecoder::CCTrack& rhs) const;
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inline bool operator<(const NuPlayer::CCDecoder::CCTrack& rhs) const;
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inline bool operator==(const NuPlayer::CCDecoder::CCTrack& rhs) const;
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inline bool operator!=(const NuPlayer::CCDecoder::CCTrack& rhs) const;
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};
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sp<AMessage> mNotify;
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KeyedVector<int64_t, sp<ABuffer> > mCCMap;
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ssize_t mSelectedTrack;
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KeyedVector<CCTrack, size_t> mTrackIndices;
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Vector<CCTrack> mTracks;
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// CEA-608 closed caption
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size_t mLine21Channels[2]; // The current channels of NTSC_CC_FIELD_{1, 2}
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// CEA-708 closed caption
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sp<ABuffer> mDTVCCPacket;
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bool isTrackValid(size_t index) const;
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size_t getTrackIndex(int32_t trackType, size_t channel, bool *trackAdded);
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// Extract from H.264 SEIs
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bool extractFromSEI(const sp<ABuffer> &accessUnit);
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bool parseSEINalUnit(int64_t timeUs, const uint8_t *data, size_t size);
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// Extract from MPEG user data
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bool extractFromMPEGUserData(const sp<ABuffer> &accessUnit);
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bool parseMPEGUserDataUnit(int64_t timeUs, const uint8_t *data, size_t size);
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// Extract CC tracks from MPEG_cc_data
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bool parseMPEGCCData(int64_t timeUs, const uint8_t *data, size_t size);
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bool parseDTVCCPacket(int64_t timeUs, const uint8_t *data, size_t size);
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DISALLOW_EVIL_CONSTRUCTORS(CCDecoder);
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};
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} // namespace android
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#endif // NUPLAYER_CCDECODER_H_
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