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Yunqing Wang authored
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
9d41313e
/* * Copyright (c) 2010 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */#ifndef VP9_ENCODER_VP9_ENCODEFRAME_H_#define VP9_ENCODER_VP9_ENCODEFRAME_H_#ifdef __cplusplusextern "C" {#endifstruct macroblock;struct yv12_buffer_config;struct VP9_COMP;// Constants used in SOURCE_VAR_BASED_PARTITION#define VAR_HIST_MAX_BG_VAR 1000#define VAR_HIST_FACTOR 10#define VAR_HIST_BINS (VAR_HIST_MAX_BG_VAR / VAR_HIST_FACTOR + 1)#define VAR_HIST_LARGE_CUT_OFF 75#define VAR_HIST_SMALL_CUT_OFF 45void vp9_setup_src_planes(struct macroblock *x, const struct yv12_buffer_config *src, int mi_row, int mi_col);void vp9_encode_frame(struct VP9_COMP *cpi);#ifdef __cplusplus} // extern "C"#endif#endif // VP9_ENCODER_VP9_ENCODEFRAME_H_