summaryrefslogtreecommitdiffstats
path: root/media/libvpx/libvpx/vp9/encoder/vp9_quantize.c
diff options
context:
space:
mode:
Diffstat (limited to 'media/libvpx/libvpx/vp9/encoder/vp9_quantize.c')
-rw-r--r--media/libvpx/libvpx/vp9/encoder/vp9_quantize.c326
1 files changed, 326 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vp9/encoder/vp9_quantize.c b/media/libvpx/libvpx/vp9/encoder/vp9_quantize.c
new file mode 100644
index 0000000000..3f4fe6957b
--- /dev/null
+++ b/media/libvpx/libvpx/vp9/encoder/vp9_quantize.c
@@ -0,0 +1,326 @@
+/*
+ * 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 <assert.h>
+#include <math.h>
+#include "./vpx_dsp_rtcd.h"
+#include "vpx_mem/vpx_mem.h"
+#include "vpx_ports/mem.h"
+
+#include "vp9/common/vp9_quant_common.h"
+#include "vp9/common/vp9_scan.h"
+#include "vp9/common/vp9_seg_common.h"
+
+#include "vp9/encoder/vp9_encoder.h"
+#include "vp9/encoder/vp9_quantize.h"
+#include "vp9/encoder/vp9_rd.h"
+
+void vp9_quantize_fp_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
+ const struct macroblock_plane *const mb_plane,
+ tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
+ const int16_t *dequant_ptr, uint16_t *eob_ptr,
+ const struct ScanOrder *const scan_order) {
+ int i, eob = -1;
+ const int16_t *round_ptr = mb_plane->round_fp;
+ const int16_t *quant_ptr = mb_plane->quant_fp;
+ const int16_t *scan = scan_order->scan;
+
+ memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+ memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+ // Quantization pass: All coefficients with index >= zero_flag are
+ // skippable. Note: zero_flag can be zero.
+ for (i = 0; i < n_coeffs; i++) {
+ const int rc = scan[i];
+ const int coeff = coeff_ptr[rc];
+ const int coeff_sign = (coeff >> 31);
+ const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+
+ int tmp = clamp(abs_coeff + round_ptr[rc != 0], INT16_MIN, INT16_MAX);
+ tmp = (tmp * quant_ptr[rc != 0]) >> 16;
+
+ qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign;
+ dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0];
+
+ if (tmp) eob = i;
+ }
+ *eob_ptr = eob + 1;
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vp9_highbd_quantize_fp_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
+ const struct macroblock_plane *const mb_plane,
+ tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
+ const int16_t *dequant_ptr, uint16_t *eob_ptr,
+ const struct ScanOrder *const scan_order) {
+ int i;
+ int eob = -1;
+ const int16_t *round_ptr = mb_plane->round_fp;
+ const int16_t *quant_ptr = mb_plane->quant_fp;
+ const int16_t *scan = scan_order->scan;
+
+ memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+ memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+ // Quantization pass: All coefficients with index >= zero_flag are
+ // skippable. Note: zero_flag can be zero.
+ for (i = 0; i < n_coeffs; i++) {
+ const int rc = scan[i];
+ const int coeff = coeff_ptr[rc];
+ const int coeff_sign = (coeff >> 31);
+ const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+ const int64_t tmp = abs_coeff + round_ptr[rc != 0];
+ const int abs_qcoeff = (int)((tmp * quant_ptr[rc != 0]) >> 16);
+ qcoeff_ptr[rc] = (tran_low_t)(abs_qcoeff ^ coeff_sign) - coeff_sign;
+ dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0];
+ if (abs_qcoeff) eob = i;
+ }
+ *eob_ptr = eob + 1;
+}
+#endif
+
+// TODO(jingning) Refactor this file and combine functions with similar
+// operations.
+void vp9_quantize_fp_32x32_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
+ const struct macroblock_plane *const mb_plane,
+ tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
+ const int16_t *dequant_ptr, uint16_t *eob_ptr,
+ const struct ScanOrder *const scan_order) {
+ int i, eob = -1;
+ const int16_t *round_ptr = mb_plane->round_fp;
+ const int16_t *quant_ptr = mb_plane->quant_fp;
+ const int16_t *scan = scan_order->scan;
+
+ memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+ memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+ for (i = 0; i < n_coeffs; i++) {
+ const int rc = scan[i];
+ const int coeff = coeff_ptr[rc];
+ const int coeff_sign = (coeff >> 31);
+ int tmp = 0;
+ int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+
+ if (abs_coeff >= (dequant_ptr[rc != 0] >> 2)) {
+ abs_coeff += ROUND_POWER_OF_TWO(round_ptr[rc != 0], 1);
+ abs_coeff = clamp(abs_coeff, INT16_MIN, INT16_MAX);
+ tmp = (abs_coeff * quant_ptr[rc != 0]) >> 15;
+ qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign;
+ dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0] / 2;
+ }
+
+ if (tmp) eob = i;
+ }
+ *eob_ptr = eob + 1;
+}
+
+#if CONFIG_VP9_HIGHBITDEPTH
+void vp9_highbd_quantize_fp_32x32_c(
+ const tran_low_t *coeff_ptr, intptr_t n_coeffs,
+ const struct macroblock_plane *const mb_plane, tran_low_t *qcoeff_ptr,
+ tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr, uint16_t *eob_ptr,
+ const struct ScanOrder *const scan_order) {
+ int i, eob = -1;
+ const int16_t *round_ptr = mb_plane->round_fp;
+ const int16_t *quant_ptr = mb_plane->quant_fp;
+ const int16_t *scan = scan_order->scan;
+
+ memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
+ memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
+
+ for (i = 0; i < n_coeffs; i++) {
+ int abs_qcoeff = 0;
+ const int rc = scan[i];
+ const int coeff = coeff_ptr[rc];
+ const int coeff_sign = (coeff >> 31);
+ const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
+
+ if (abs_coeff >= (dequant_ptr[rc != 0] >> 2)) {
+ const int64_t tmp = abs_coeff + ROUND_POWER_OF_TWO(round_ptr[rc != 0], 1);
+ abs_qcoeff = (int)((tmp * quant_ptr[rc != 0]) >> 15);
+ qcoeff_ptr[rc] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign);
+ dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0] / 2;
+ }
+
+ if (abs_qcoeff) eob = i;
+ }
+ *eob_ptr = eob + 1;
+}
+#endif
+
+static void invert_quant(int16_t *quant, int16_t *shift, int d) {
+ unsigned int t;
+ int l, m;
+ t = (unsigned int)d;
+ l = get_msb(t);
+ m = 1 + (1 << (16 + l)) / d;
+ *quant = (int16_t)(m - (1 << 16));
+ *shift = 1 << (16 - l);
+}
+
+static int get_qzbin_factor(int q, vpx_bit_depth_t bit_depth) {
+ const int quant = vp9_dc_quant(q, 0, bit_depth);
+#if CONFIG_VP9_HIGHBITDEPTH
+ switch (bit_depth) {
+ case VPX_BITS_8: return q == 0 ? 64 : (quant < 148 ? 84 : 80);
+ case VPX_BITS_10: return q == 0 ? 64 : (quant < 592 ? 84 : 80);
+ default:
+ assert(bit_depth == VPX_BITS_12);
+ return q == 0 ? 64 : (quant < 2368 ? 84 : 80);
+ }
+#else
+ (void)bit_depth;
+ return q == 0 ? 64 : (quant < 148 ? 84 : 80);
+#endif
+}
+
+void vp9_init_quantizer(VP9_COMP *cpi) {
+ VP9_COMMON *const cm = &cpi->common;
+ QUANTS *const quants = &cpi->quants;
+ int i, q, quant;
+
+ for (q = 0; q < QINDEX_RANGE; q++) {
+ int qzbin_factor = get_qzbin_factor(q, cm->bit_depth);
+ int qrounding_factor = q == 0 ? 64 : 48;
+ const int sharpness_adjustment = 16 * (7 - cpi->oxcf.sharpness) / 7;
+
+ if (cpi->oxcf.sharpness > 0 && q > 0) {
+ qzbin_factor = 64 + sharpness_adjustment;
+ qrounding_factor = 64 - sharpness_adjustment;
+ }
+
+ for (i = 0; i < 2; ++i) {
+ int qrounding_factor_fp = i == 0 ? 48 : 42;
+ if (q == 0) qrounding_factor_fp = 64;
+ if (cpi->oxcf.sharpness > 0)
+ qrounding_factor_fp = 64 - sharpness_adjustment;
+ // y
+ quant = i == 0 ? vp9_dc_quant(q, cm->y_dc_delta_q, cm->bit_depth)
+ : vp9_ac_quant(q, 0, cm->bit_depth);
+ invert_quant(&quants->y_quant[q][i], &quants->y_quant_shift[q][i], quant);
+ quants->y_quant_fp[q][i] = (1 << 16) / quant;
+ quants->y_round_fp[q][i] = (qrounding_factor_fp * quant) >> 7;
+ quants->y_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant, 7);
+ quants->y_round[q][i] = (qrounding_factor * quant) >> 7;
+ cpi->y_dequant[q][i] = quant;
+
+ // uv
+ quant = i == 0 ? vp9_dc_quant(q, cm->uv_dc_delta_q, cm->bit_depth)
+ : vp9_ac_quant(q, cm->uv_ac_delta_q, cm->bit_depth);
+ invert_quant(&quants->uv_quant[q][i], &quants->uv_quant_shift[q][i],
+ quant);
+ quants->uv_quant_fp[q][i] = (1 << 16) / quant;
+ quants->uv_round_fp[q][i] = (qrounding_factor_fp * quant) >> 7;
+ quants->uv_zbin[q][i] = ROUND_POWER_OF_TWO(qzbin_factor * quant, 7);
+ quants->uv_round[q][i] = (qrounding_factor * quant) >> 7;
+ cpi->uv_dequant[q][i] = quant;
+ }
+
+ for (i = 2; i < 8; i++) {
+ quants->y_quant[q][i] = quants->y_quant[q][1];
+ quants->y_quant_fp[q][i] = quants->y_quant_fp[q][1];
+ quants->y_round_fp[q][i] = quants->y_round_fp[q][1];
+ quants->y_quant_shift[q][i] = quants->y_quant_shift[q][1];
+ quants->y_zbin[q][i] = quants->y_zbin[q][1];
+ quants->y_round[q][i] = quants->y_round[q][1];
+ cpi->y_dequant[q][i] = cpi->y_dequant[q][1];
+
+ quants->uv_quant[q][i] = quants->uv_quant[q][1];
+ quants->uv_quant_fp[q][i] = quants->uv_quant_fp[q][1];
+ quants->uv_round_fp[q][i] = quants->uv_round_fp[q][1];
+ quants->uv_quant_shift[q][i] = quants->uv_quant_shift[q][1];
+ quants->uv_zbin[q][i] = quants->uv_zbin[q][1];
+ quants->uv_round[q][i] = quants->uv_round[q][1];
+ cpi->uv_dequant[q][i] = cpi->uv_dequant[q][1];
+ }
+ }
+}
+
+void vp9_init_plane_quantizers(VP9_COMP *cpi, MACROBLOCK *x) {
+ const VP9_COMMON *const cm = &cpi->common;
+ MACROBLOCKD *const xd = &x->e_mbd;
+ QUANTS *const quants = &cpi->quants;
+ const int segment_id = xd->mi[0]->segment_id;
+ const int qindex = vp9_get_qindex(&cm->seg, segment_id, cm->base_qindex);
+ const int rdmult = vp9_compute_rd_mult(cpi, qindex + cm->y_dc_delta_q);
+ int i;
+
+ // Y
+ x->plane[0].quant = quants->y_quant[qindex];
+ x->plane[0].quant_fp = quants->y_quant_fp[qindex];
+ x->plane[0].round_fp = quants->y_round_fp[qindex];
+ x->plane[0].quant_shift = quants->y_quant_shift[qindex];
+ x->plane[0].zbin = quants->y_zbin[qindex];
+ x->plane[0].round = quants->y_round[qindex];
+ xd->plane[0].dequant = cpi->y_dequant[qindex];
+ x->plane[0].quant_thred[0] = x->plane[0].zbin[0] * x->plane[0].zbin[0];
+ x->plane[0].quant_thred[1] = x->plane[0].zbin[1] * x->plane[0].zbin[1];
+
+ // UV
+ for (i = 1; i < 3; i++) {
+ x->plane[i].quant = quants->uv_quant[qindex];
+ x->plane[i].quant_fp = quants->uv_quant_fp[qindex];
+ x->plane[i].round_fp = quants->uv_round_fp[qindex];
+ x->plane[i].quant_shift = quants->uv_quant_shift[qindex];
+ x->plane[i].zbin = quants->uv_zbin[qindex];
+ x->plane[i].round = quants->uv_round[qindex];
+ xd->plane[i].dequant = cpi->uv_dequant[qindex];
+ x->plane[i].quant_thred[0] = x->plane[i].zbin[0] * x->plane[i].zbin[0];
+ x->plane[i].quant_thred[1] = x->plane[i].zbin[1] * x->plane[i].zbin[1];
+ }
+
+ x->skip_block = segfeature_active(&cm->seg, segment_id, SEG_LVL_SKIP);
+ x->q_index = qindex;
+
+ set_error_per_bit(x, rdmult);
+
+ vp9_initialize_me_consts(cpi, x, x->q_index);
+}
+
+void vp9_frame_init_quantizer(VP9_COMP *cpi) {
+ vp9_init_plane_quantizers(cpi, &cpi->td.mb);
+}
+
+void vp9_set_quantizer(VP9_COMP *cpi, int q) {
+ VP9_COMMON *cm = &cpi->common;
+ // quantizer has to be reinitialized with vp9_init_quantizer() if any
+ // delta_q changes.
+ cm->base_qindex = q;
+ cm->y_dc_delta_q = 0;
+ cm->uv_dc_delta_q = 0;
+ cm->uv_ac_delta_q = 0;
+ if (cpi->oxcf.delta_q_uv != 0) {
+ cm->uv_dc_delta_q = cm->uv_ac_delta_q = cpi->oxcf.delta_q_uv;
+ vp9_init_quantizer(cpi);
+ }
+}
+
+// Table that converts 0-63 Q-range values passed in outside to the Qindex
+// range used internally.
+static const int quantizer_to_qindex[] = {
+ 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48,
+ 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100,
+ 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 148, 152,
+ 156, 160, 164, 168, 172, 176, 180, 184, 188, 192, 196, 200, 204,
+ 208, 212, 216, 220, 224, 228, 232, 236, 240, 244, 249, 255,
+};
+
+int vp9_quantizer_to_qindex(int quantizer) {
+ return quantizer_to_qindex[quantizer];
+}
+
+int vp9_qindex_to_quantizer(int qindex) {
+ int quantizer;
+
+ for (quantizer = 0; quantizer < 64; ++quantizer)
+ if (quantizer_to_qindex[quantizer] >= qindex) return quantizer;
+
+ return 63;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-06 22:28:51 +0000