diff options
Diffstat (limited to 'third_party/aom/av1/encoder/aq_variance.c')
| -rw-r--r-- | third_party/aom/av1/encoder/aq_variance.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/third_party/aom/av1/encoder/aq_variance.c b/third_party/aom/av1/encoder/aq_variance.c new file mode 100644 index 000000000..ab9b3790b --- /dev/null +++ b/third_party/aom/av1/encoder/aq_variance.c @@ -0,0 +1,207 @@ +/* + * Copyright (c) 2016, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +#include <math.h> + +#include "aom_ports/mem.h" + +#include "av1/encoder/aq_variance.h" + +#include "av1/common/seg_common.h" +#include "av1/encoder/ratectrl.h" +#include "av1/encoder/rd.h" +#include "av1/encoder/segmentation.h" +#include "aom_ports/system_state.h" + +#define ENERGY_MIN (-4) +#define ENERGY_MAX (1) +#define ENERGY_SPAN (ENERGY_MAX - ENERGY_MIN + 1) +#define ENERGY_IN_BOUNDS(energy) \ + assert((energy) >= ENERGY_MIN && (energy) <= ENERGY_MAX) + +static const double rate_ratio[MAX_SEGMENTS] = { 2.5, 2.0, 1.5, 1.0, + 0.75, 1.0, 1.0, 1.0 }; +static const int segment_id[ENERGY_SPAN] = { 0, 1, 1, 2, 3, 4 }; + +#define SEGMENT_ID(i) segment_id[(i)-ENERGY_MIN] + +DECLARE_ALIGNED(16, static const uint8_t, av1_all_zeros[MAX_SB_SIZE]) = { 0 }; +#if CONFIG_HIGHBITDEPTH +DECLARE_ALIGNED(16, static const uint16_t, + av1_highbd_all_zeros[MAX_SB_SIZE]) = { 0 }; +#endif + +unsigned int av1_vaq_segment_id(int energy) { + ENERGY_IN_BOUNDS(energy); + return SEGMENT_ID(energy); +} + +void av1_vaq_frame_setup(AV1_COMP *cpi) { + AV1_COMMON *cm = &cpi->common; + struct segmentation *seg = &cm->seg; + int i; + + if (frame_is_intra_only(cm) || cm->error_resilient_mode || + cpi->refresh_alt_ref_frame || + (cpi->refresh_golden_frame && !cpi->rc.is_src_frame_alt_ref)) { + cpi->vaq_refresh = 1; + + av1_enable_segmentation(seg); + av1_clearall_segfeatures(seg); + + seg->abs_delta = SEGMENT_DELTADATA; + + aom_clear_system_state(); + + for (i = 0; i < MAX_SEGMENTS; ++i) { + int qindex_delta = + av1_compute_qdelta_by_rate(&cpi->rc, cm->frame_type, cm->base_qindex, + rate_ratio[i], cm->bit_depth); + + // We don't allow qindex 0 in a segment if the base value is not 0. + // Q index 0 (lossless) implies 4x4 encoding only and in AQ mode a segment + // Q delta is sometimes applied without going back around the rd loop. + // This could lead to an illegal combination of partition size and q. + if ((cm->base_qindex != 0) && ((cm->base_qindex + qindex_delta) == 0)) { + qindex_delta = -cm->base_qindex + 1; + } + + // No need to enable SEG_LVL_ALT_Q for this segment. + if (rate_ratio[i] == 1.0) { + continue; + } + + av1_set_segdata(seg, i, SEG_LVL_ALT_Q, qindex_delta); + av1_enable_segfeature(seg, i, SEG_LVL_ALT_Q); + } + } +} + +/* TODO(agrange, paulwilkins): The block_variance calls the unoptimized versions + * of variance() and highbd_8_variance(). It should not. + */ +static void aq_variance(const uint8_t *a, int a_stride, const uint8_t *b, + int b_stride, int w, int h, unsigned int *sse, + int *sum) { + int i, j; + + *sum = 0; + *sse = 0; + + for (i = 0; i < h; i++) { + for (j = 0; j < w; j++) { + const int diff = a[j] - b[j]; + *sum += diff; + *sse += diff * diff; + } + + a += a_stride; + b += b_stride; + } +} + +#if CONFIG_HIGHBITDEPTH +static void aq_highbd_variance64(const uint8_t *a8, int a_stride, + const uint8_t *b8, int b_stride, int w, int h, + uint64_t *sse, uint64_t *sum) { + int i, j; + + uint16_t *a = CONVERT_TO_SHORTPTR(a8); + uint16_t *b = CONVERT_TO_SHORTPTR(b8); + *sum = 0; + *sse = 0; + + for (i = 0; i < h; i++) { + for (j = 0; j < w; j++) { + const int diff = a[j] - b[j]; + *sum += diff; + *sse += diff * diff; + } + a += a_stride; + b += b_stride; + } +} + +static void aq_highbd_8_variance(const uint8_t *a8, int a_stride, + const uint8_t *b8, int b_stride, int w, int h, + unsigned int *sse, int *sum) { + uint64_t sse_long = 0; + uint64_t sum_long = 0; + aq_highbd_variance64(a8, a_stride, b8, b_stride, w, h, &sse_long, &sum_long); + *sse = (unsigned int)sse_long; + *sum = (int)sum_long; +} +#endif // CONFIG_HIGHBITDEPTH + +static unsigned int block_variance(const AV1_COMP *const cpi, MACROBLOCK *x, + BLOCK_SIZE bs) { + MACROBLOCKD *xd = &x->e_mbd; + unsigned int var, sse; + int right_overflow = + (xd->mb_to_right_edge < 0) ? ((-xd->mb_to_right_edge) >> 3) : 0; + int bottom_overflow = + (xd->mb_to_bottom_edge < 0) ? ((-xd->mb_to_bottom_edge) >> 3) : 0; + + if (right_overflow || bottom_overflow) { + const int bw = 8 * mi_size_wide[bs] - right_overflow; + const int bh = 8 * mi_size_high[bs] - bottom_overflow; + int avg; +#if CONFIG_HIGHBITDEPTH + if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) { + aq_highbd_8_variance(x->plane[0].src.buf, x->plane[0].src.stride, + CONVERT_TO_BYTEPTR(av1_highbd_all_zeros), 0, bw, bh, + &sse, &avg); + sse >>= 2 * (xd->bd - 8); + avg >>= (xd->bd - 8); + } else { + aq_variance(x->plane[0].src.buf, x->plane[0].src.stride, av1_all_zeros, 0, + bw, bh, &sse, &avg); + } +#else + aq_variance(x->plane[0].src.buf, x->plane[0].src.stride, av1_all_zeros, 0, + bw, bh, &sse, &avg); +#endif // CONFIG_HIGHBITDEPTH + var = sse - (unsigned int)(((int64_t)avg * avg) / (bw * bh)); + return (unsigned int)((uint64_t)var * 256) / (bw * bh); + } else { +#if CONFIG_HIGHBITDEPTH + if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) { + var = + cpi->fn_ptr[bs].vf(x->plane[0].src.buf, x->plane[0].src.stride, + CONVERT_TO_BYTEPTR(av1_highbd_all_zeros), 0, &sse); + } else { + var = cpi->fn_ptr[bs].vf(x->plane[0].src.buf, x->plane[0].src.stride, + av1_all_zeros, 0, &sse); + } +#else + var = cpi->fn_ptr[bs].vf(x->plane[0].src.buf, x->plane[0].src.stride, + av1_all_zeros, 0, &sse); +#endif // CONFIG_HIGHBITDEPTH + return (unsigned int)((uint64_t)var * 256) >> num_pels_log2_lookup[bs]; + } +} + +double av1_log_block_var(const AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bs) { + unsigned int var = block_variance(cpi, x, bs); + aom_clear_system_state(); + return log(var + 1.0); +} + +#define DEFAULT_E_MIDPOINT 10.0 +int av1_block_energy(const AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bs) { + double energy; + double energy_midpoint; + aom_clear_system_state(); + energy_midpoint = + (cpi->oxcf.pass == 2) ? cpi->twopass.mb_av_energy : DEFAULT_E_MIDPOINT; + energy = av1_log_block_var(cpi, x, bs) - energy_midpoint; + return clamp((int)round(energy), ENERGY_MIN, ENERGY_MAX); +} |