Index: media/video/h264_poc.h |
diff --git a/media/video/h264_poc.h b/media/video/h264_poc.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..5457231a323e43801e8d0bd8496e1691c3aa44e2 |
--- /dev/null |
+++ b/media/video/h264_poc.h |
@@ -0,0 +1,40 @@ |
+// Copyright 2014 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef MEDIA_VIDEO_H264_POC_H_ |
+#define MEDIA_VIDEO_H264_POC_H_ |
+ |
+namespace media { |
+ |
+struct H264SPS; |
+struct H264SliceHeader; |
+ |
+class MEDIA_EXPORT H264POC { |
+ public: |
+ H264POC(); |
+ ~H264POC(); |
+ |
+ // Compute the picture order count for a slice, storing the result into |
+ // |*pic_order_cnt|. |
+ bool ComputePicOrderCnt( |
+ const H264SPS* sps, |
+ const H264SliceHeader& slice_hdr, |
+ int32_t* pic_order_cnt); |
+ |
+ // Reset computation state. It's best (although not strictly required) to call |
+ // this after a seek. |
+ void Reset(); |
+ |
+ private: |
+ int32_t ref_pic_order_cnt_msb_; |
+ int32_t ref_pic_order_cnt_lsb_; |
+ int32_t prev_frame_num_; |
+ int32_t prev_frame_num_offset_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(H264POC); |
+}; |
+ |
+} // namespace media |
+ |
+#endif // MEDIA_VIDEO_H264_POC_H_ |