2017-10-09 22:11:01 +08:00
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// Copyright 2014 The Chromium Authors. All rights reserved.
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2017-04-01 16:35:56 +08:00
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef MEDIA_VIDEO_H264_POC_H_
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#define MEDIA_VIDEO_H264_POC_H_
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#include <stdint.h>
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#include "macros.h"
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using namespace std;
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namespace media {
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struct H264SPS;
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struct H264SliceHeader;
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class MEDIA_EXPORT H264POC {
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public:
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H264POC();
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~H264POC();
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// Compute the picture order count for a slice, storing the result into
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// |*pic_order_cnt|.
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bool ComputePicOrderCnt(
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const H264SPS* sps,
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const H264SliceHeader& slice_hdr,
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int32_t* pic_order_cnt);
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// Reset computation state. It's best (although not strictly required) to call
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// this after a seek.
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void Reset();
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private:
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int32_t ref_pic_order_cnt_msb_;
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int32_t ref_pic_order_cnt_lsb_;
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int32_t prev_frame_num_;
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int32_t prev_frame_num_offset_;
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DISALLOW_COPY_AND_ASSIGN(H264POC);
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};
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} // namespace media
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#endif // MEDIA_VIDEO_H264_POC_H_
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