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75 lines
2.4 KiB
75 lines
2.4 KiB
/* |
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* Copyright (c) 2009-2011 Intel Corporation. All rights reserved. |
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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 VIDEO_DECODER_AVC_SECURE_H_ |
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#define VIDEO_DECODER_AVC_SECURE_H_ |
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#include "VideoDecoderAVC.h" |
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class VideoDecoderAVCSecure : public VideoDecoderAVC { |
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public: |
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VideoDecoderAVCSecure(const char *mimeType); |
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virtual ~VideoDecoderAVCSecure(); |
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virtual Decode_Status start(VideoConfigBuffer *buffer); |
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virtual void stop(void); |
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// data in the decoded buffer is all encrypted. |
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virtual Decode_Status decode(VideoDecodeBuffer *buffer); |
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private: |
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enum { |
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MAX_SLICE_HEADER_SIZE = 30, |
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MAX_NALU_HEADER_BUFFER = 8192, |
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MAX_NALU_NUMBER = 400, // > 4096/12 |
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}; |
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// Information of Network Abstraction Layer Unit |
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struct NaluInfo { |
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int32_t naluOffset; // offset of NAL unit in the firewalled buffer |
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int32_t naluLen; // length of NAL unit |
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int32_t naluHeaderLen; // length of NAL unit header |
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}; |
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struct NaluMetadata { |
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NaluInfo *naluInfo; |
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int32_t naluNumber; // number of NAL units |
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}; |
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struct NaluByteStream { |
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int32_t naluOffset; |
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int32_t naluLen; |
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int32_t streamPos; |
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uint8_t *byteStream; // 4 bytes of naluCount, 4 bytes of naluOffset, 4 bytes of naulLen, 4 bytes of naluHeaderLen, followed by naluHeaderData |
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int32_t naluCount; |
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}; |
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virtual Decode_Status decodeSlice(vbp_data_h264 *data, uint32_t picIndex, uint32_t sliceIndex); |
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int32_t findNalUnitOffset(uint8_t *stream, int32_t offset, int32_t length); |
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Decode_Status copyNaluHeader(uint8_t *stream, NaluByteStream *naluStream); |
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Decode_Status parseAnnexBStream(uint8_t *stream, int32_t length, NaluByteStream *naluStream); |
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private: |
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NaluMetadata mMetadata; |
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NaluByteStream mByteStream; |
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uint8_t *mNaluHeaderBuffer; |
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uint8_t *mInputBuffer; |
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}; |
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#endif /* VIDEO_DECODER_AVC_SECURE_H_ */
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