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Jim Bankoski authored
Change-Id: Ifdd951f24932839f06d1c700371662511dde6ebe
9dec7712
/* * 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. */#include <limits.h>#include <math.h>#include <stdio.h>#include "./vp9_rtcd.h"#include "./vpx_config.h"#include "vpx_ports/vpx_timer.h"#include "vp9/common/vp9_common.h"#include "vp9/common/vp9_entropy.h"#include "vp9/common/vp9_entropymode.h"#include "vp9/common/vp9_idct.h"#include "vp9/common/vp9_mvref_common.h"#include "vp9/common/vp9_pred_common.h"#include "vp9/common/vp9_quant_common.h"#include "vp9/common/vp9_reconintra.h"#include "vp9/common/vp9_reconinter.h"#include "vp9/common/vp9_seg_common.h"#include "vp9/common/vp9_systemdependent.h"#include "vp9/common/vp9_tile_common.h"#include "vp9/encoder/vp9_encodeframe.h"#include "vp9/encoder/vp9_encodemb.h"#include "vp9/encoder/vp9_encodemv.h"#include "vp9/encoder/vp9_extend.h"#include "vp9/encoder/vp9_onyx_int.h"#include "vp9/encoder/vp9_pickmode.h"#include "vp9/encoder/vp9_rdopt.h"#include "vp9/encoder/vp9_segmentation.h"#include "vp9/encoder/vp9_tokenize.h"#include "vp9/encoder/vp9_vaq.h"#define DBG_PRNT_SEGMAP 0// #define ENC_DEBUG#ifdef ENC_DEBUGint enc_debug = 0;#endifstatic INLINE uint8_t *get_sb_index(MACROBLOCK *x, BLOCK_SIZE subsize) { switch (subsize) { case BLOCK_64X64: case BLOCK_64X32: case BLOCK_32X64: case BLOCK_32X32: return &x->sb_index; case BLOCK_32X16: case BLOCK_16X32: case BLOCK_16X16: return &x->mb_index; case BLOCK_16X8: case BLOCK_8X16: case BLOCK_8X8: return &x->b_index; case BLOCK_8X4: case BLOCK_4X8: case BLOCK_4X4: return &x->ab_index; default:7172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140
assert(0);
return NULL;
}
}
static void encode_superblock(VP9_COMP *cpi, TOKENEXTRA **t, int output_enabled,
int mi_row, int mi_col, BLOCK_SIZE bsize);
static void adjust_act_zbin(VP9_COMP *cpi, MACROBLOCK *x);
// activity_avg must be positive, or flat regions could get a zero weight
// (infinite lambda), which confounds analysis.
// This also avoids the need for divide by zero checks in
// vp9_activity_masking().
#define ACTIVITY_AVG_MIN (64)
// Motion vector component magnitude threshold for defining fast motion.
#define FAST_MOTION_MV_THRESH (24)
// This is used as a reference when computing the source variance for the
// purposes of activity masking.
// Eventually this should be replaced by custom no-reference routines,
// which will be faster.
static const uint8_t VP9_VAR_OFFS[64] = {
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128,
128, 128, 128, 128, 128, 128, 128, 128
};
static unsigned int get_sby_perpixel_variance(VP9_COMP *cpi, MACROBLOCK *x,
BLOCK_SIZE bs) {
unsigned int var, sse;
var = cpi->fn_ptr[bs].vf(x->plane[0].src.buf, x->plane[0].src.stride,
VP9_VAR_OFFS, 0, &sse);
return ROUND_POWER_OF_TWO(var, num_pels_log2_lookup[bs]);
}
// Original activity measure from Tim T's code.
static unsigned int tt_activity_measure(MACROBLOCK *x) {
unsigned int sse;
/* TODO: This could also be done over smaller areas (8x8), but that would
* require extensive changes elsewhere, as lambda is assumed to be fixed
* over an entire MB in most of the code.
* Another option is to compute four 8x8 variances, and pick a single
* lambda using a non-linear combination (e.g., the smallest, or second
* smallest, etc.).
*/
unsigned int act = vp9_variance16x16(x->plane[0].src.buf,
x->plane[0].src.stride,
VP9_VAR_OFFS, 0, &sse) << 4;
// If the region is flat, lower the activity some more.
if (act < (8 << 12))
act = MIN(act, 5 << 12);
return act;
}
// Stub for alternative experimental activity measures.
static unsigned int alt_activity_measure(MACROBLOCK *x, int use_dc_pred) {
return vp9_encode_intra(x, use_dc_pred);
}
// Measure the activity of the current macroblock
// What we measure here is TBD so abstracted to this function
#define ALT_ACT_MEASURE 1