9d41313e4b
Before encoding a frame, calculate and store each 16x16 block's variance of source difference between last and current frame. Find partitioning threshold T for the frame from its variance histogram, and then use T to make partition decisions. Comparing with fixed 16x16 partitioning, rtc set test showed an overall psnr gain of 3.242%, and ssim gain of 3.751%. The best psnr gain is 8.653%. The overall encoding speed didn't change much. It got faster for some clips(for example, 12% speedup for vidyo1), and a little slower for others. Also, a minor modification was made in datarate unit test. Change-Id: Ie290743aa3814e83607b93831b667a2a49d0932c
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VP9_ENCODER_VP9_ENCODEFRAME_H_
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#define VP9_ENCODER_VP9_ENCODEFRAME_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct macroblock;
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struct yv12_buffer_config;
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struct VP9_COMP;
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// Constants used in SOURCE_VAR_BASED_PARTITION
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#define VAR_HIST_MAX_BG_VAR 1000
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#define VAR_HIST_FACTOR 10
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#define VAR_HIST_BINS (VAR_HIST_MAX_BG_VAR / VAR_HIST_FACTOR + 1)
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#define VAR_HIST_LARGE_CUT_OFF 75
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#define VAR_HIST_SMALL_CUT_OFF 45
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void vp9_setup_src_planes(struct macroblock *x,
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const struct yv12_buffer_config *src,
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int mi_row, int mi_col);
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void vp9_encode_frame(struct VP9_COMP *cpi);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // VP9_ENCODER_VP9_ENCODEFRAME_H_
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