d39b5d0546
One of the problems arising when tweaking or adjusting the quantizer
tables is that there are a lot of look up tables that depend on the QINDEX.
Any adjustment to the link between QINDEX and real quantizer therefore tends
to break aspects of for example the rate control.
In this check in I have replaced several of the look up tables with functions that
approximate the same results as the old Q luts but use a formulaic approach
based on real Q values rather than QIndex. This should hopefully make it easier
to experiment with changes to the Q tables without always having to go through
and hand optimize a set of look up tables. Once things stabilize we may choose
to re-instate luts for the sake of performance.
Patch 2:
Addressed Ronald's comments.
vp8_init_me_luts() Added so luts only initialized once.
Change-Id: Ic80db2212d2fd01e08e8cb5c7dca1fda1102be57
33 lines
1.2 KiB
C
33 lines
1.2 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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#if !defined __INC_RATECTRL_H
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#include "onyx_int.h"
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extern void vp8_save_coding_context(VP8_COMP *cpi);
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extern void vp8_restore_coding_context(VP8_COMP *cpi);
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extern void vp8_setup_key_frame(VP8_COMP *cpi);
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extern void vp8_update_rate_correction_factors(VP8_COMP *cpi, int damp_var);
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extern int vp8_regulate_q(VP8_COMP *cpi, int target_bits_per_frame);
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extern void vp8_adjust_key_frame_context(VP8_COMP *cpi);
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extern void vp8_compute_frame_size_bounds(VP8_COMP *cpi, int *frame_under_shoot_limit, int *frame_over_shoot_limit);
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// return of 0 means drop frame
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extern int vp8_pick_frame_size(VP8_COMP *cpi);
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extern double vp8_convert_qindex_to_q( int qindex );
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extern int vp8_gfboost_qadjust( int qindex );
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extern int vp8_bits_per_mb( FRAME_TYPE frame_type, int qindex );
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#endif
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