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| -rw-r--r-- | third_party/aom/av1/encoder/nonrd_opt.c | 933 |
1 files changed, 933 insertions, 0 deletions
diff --git a/third_party/aom/av1/encoder/nonrd_opt.c b/third_party/aom/av1/encoder/nonrd_opt.c new file mode 100644 index 0000000000..651ca43a2e --- /dev/null +++ b/third_party/aom/av1/encoder/nonrd_opt.c @@ -0,0 +1,933 @@ +/* + * Copyright (c) 2023, 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 "config/aom_dsp_rtcd.h" + +#include "av1/common/reconinter.h" + +#include "av1/encoder/encodemv.h" +#include "av1/encoder/nonrd_opt.h" +#include "av1/encoder/rdopt.h" + +static const SCAN_ORDER av1_fast_idtx_scan_order_16x16 = { + av1_fast_idtx_scan_16x16, av1_fast_idtx_iscan_16x16 +}; + +#define DECLARE_BLOCK_YRD_BUFFERS() \ + DECLARE_ALIGNED(64, tran_low_t, dqcoeff_buf[16 * 16]); \ + DECLARE_ALIGNED(64, tran_low_t, qcoeff_buf[16 * 16]); \ + DECLARE_ALIGNED(64, tran_low_t, coeff_buf[16 * 16]); \ + uint16_t eob[1]; + +#define DECLARE_BLOCK_YRD_VARS() \ + /* When is_tx_8x8_dual_applicable is true, we compute the txfm for the \ + * entire bsize and write macroblock_plane::coeff. So low_coeff is kept \ + * as a non-const so we can reassign it to macroblock_plane::coeff. */ \ + int16_t *low_coeff = (int16_t *)coeff_buf; \ + int16_t *const low_qcoeff = (int16_t *)qcoeff_buf; \ + int16_t *const low_dqcoeff = (int16_t *)dqcoeff_buf; \ + const int diff_stride = bw; + +#define DECLARE_LOOP_VARS_BLOCK_YRD() \ + const int16_t *src_diff = &p->src_diff[(r * diff_stride + c) << 2]; + +static AOM_FORCE_INLINE void update_yrd_loop_vars( + MACROBLOCK *x, int *skippable, int step, int ncoeffs, + int16_t *const low_coeff, int16_t *const low_qcoeff, + int16_t *const low_dqcoeff, RD_STATS *this_rdc, int *eob_cost, + int tx_blk_id) { + const int is_txfm_skip = (ncoeffs == 0); + *skippable &= is_txfm_skip; + x->txfm_search_info.blk_skip[tx_blk_id] = is_txfm_skip; + *eob_cost += get_msb(ncoeffs + 1); + if (ncoeffs == 1) + this_rdc->rate += (int)abs(low_qcoeff[0]); + else if (ncoeffs > 1) + this_rdc->rate += aom_satd_lp(low_qcoeff, step << 4); + + this_rdc->dist += av1_block_error_lp(low_coeff, low_dqcoeff, step << 4) >> 2; +} + +static INLINE void aom_process_hadamard_lp_8x16(MACROBLOCK *x, + int max_blocks_high, + int max_blocks_wide, + int num_4x4_w, int step, + int block_step) { + struct macroblock_plane *const p = &x->plane[AOM_PLANE_Y]; + const int bw = 4 * num_4x4_w; + const int num_4x4 = AOMMIN(num_4x4_w, max_blocks_wide); + int block = 0; + + for (int r = 0; r < max_blocks_high; r += block_step) { + for (int c = 0; c < num_4x4; c += 2 * block_step) { + const int16_t *src_diff = &p->src_diff[(r * bw + c) << 2]; + int16_t *low_coeff = (int16_t *)p->coeff + BLOCK_OFFSET(block); + aom_hadamard_lp_8x8_dual(src_diff, (ptrdiff_t)bw, low_coeff); + block += 2 * step; + } + } +} + +#if CONFIG_AV1_HIGHBITDEPTH +#define DECLARE_BLOCK_YRD_HBD_VARS() \ + tran_low_t *const coeff = coeff_buf; \ + tran_low_t *const qcoeff = qcoeff_buf; \ + tran_low_t *const dqcoeff = dqcoeff_buf; + +static AOM_FORCE_INLINE void update_yrd_loop_vars_hbd( + MACROBLOCK *x, int *skippable, int step, int ncoeffs, + tran_low_t *const coeff, tran_low_t *const qcoeff, + tran_low_t *const dqcoeff, RD_STATS *this_rdc, int *eob_cost, + int tx_blk_id) { + const MACROBLOCKD *xd = &x->e_mbd; + const int is_txfm_skip = (ncoeffs == 0); + *skippable &= is_txfm_skip; + x->txfm_search_info.blk_skip[tx_blk_id] = is_txfm_skip; + *eob_cost += get_msb(ncoeffs + 1); + + int64_t dummy; + if (ncoeffs == 1) + this_rdc->rate += (int)abs(qcoeff[0]); + else if (ncoeffs > 1) + this_rdc->rate += aom_satd(qcoeff, step << 4); + this_rdc->dist += + av1_highbd_block_error(coeff, dqcoeff, step << 4, &dummy, xd->bd) >> 2; +} +#endif + +/*!\brief Calculates RD Cost using Hadamard transform. + * + * \ingroup nonrd_mode_search + * \callgraph + * \callergraph + * Calculates RD Cost using Hadamard transform. For low bit depth this function + * uses low-precision set of functions (16-bit) and 32 bit for high bit depth + * \param[in] x Pointer to structure holding all the data for + the current macroblock + * \param[in] this_rdc Pointer to calculated RD Cost + * \param[in] skippable Pointer to a flag indicating possible tx skip + * \param[in] bsize Current block size + * \param[in] tx_size Transform size + * \param[in] is_inter_mode Flag to indicate inter mode + * + * \remark Nothing is returned. Instead, calculated RD cost is placed to + * \c this_rdc. \c skippable flag is set if there is no non-zero quantized + * coefficients for Hadamard transform + */ +void av1_block_yrd(MACROBLOCK *x, RD_STATS *this_rdc, int *skippable, + BLOCK_SIZE bsize, TX_SIZE tx_size) { + MACROBLOCKD *xd = &x->e_mbd; + const struct macroblockd_plane *pd = &xd->plane[AOM_PLANE_Y]; + struct macroblock_plane *const p = &x->plane[AOM_PLANE_Y]; + assert(bsize < BLOCK_SIZES_ALL); + const int num_4x4_w = mi_size_wide[bsize]; + const int num_4x4_h = mi_size_high[bsize]; + const int step = 1 << (tx_size << 1); + const int block_step = (1 << tx_size); + const int row_step = step * num_4x4_w >> tx_size; + int block = 0; + const int max_blocks_wide = + num_4x4_w + (xd->mb_to_right_edge >= 0 ? 0 : xd->mb_to_right_edge >> 5); + const int max_blocks_high = + num_4x4_h + (xd->mb_to_bottom_edge >= 0 ? 0 : xd->mb_to_bottom_edge >> 5); + int eob_cost = 0; + const int bw = 4 * num_4x4_w; + const int bh = 4 * num_4x4_h; + const int use_hbd = is_cur_buf_hbd(xd); + int num_blk_skip_w = num_4x4_w; + +#if CONFIG_AV1_HIGHBITDEPTH + if (use_hbd) { + aom_highbd_subtract_block(bh, bw, p->src_diff, bw, p->src.buf, + p->src.stride, pd->dst.buf, pd->dst.stride); + } else { + aom_subtract_block(bh, bw, p->src_diff, bw, p->src.buf, p->src.stride, + pd->dst.buf, pd->dst.stride); + } +#else + aom_subtract_block(bh, bw, p->src_diff, bw, p->src.buf, p->src.stride, + pd->dst.buf, pd->dst.stride); +#endif + + // Keep the intermediate value on the stack here. Writing directly to + // skippable causes speed regression due to load-and-store issues in + // update_yrd_loop_vars. + int temp_skippable = 1; + this_rdc->dist = 0; + this_rdc->rate = 0; + // For block sizes 8x16 or above, Hadamard txfm of two adjacent 8x8 blocks + // can be done per function call. Hence the call of Hadamard txfm is + // abstracted here for the specified cases. + int is_tx_8x8_dual_applicable = + (tx_size == TX_8X8 && block_size_wide[bsize] >= 16 && + block_size_high[bsize] >= 8); + +#if CONFIG_AV1_HIGHBITDEPTH + // As of now, dual implementation of hadamard txfm is available for low + // bitdepth. + if (use_hbd) is_tx_8x8_dual_applicable = 0; +#endif + + if (is_tx_8x8_dual_applicable) { + aom_process_hadamard_lp_8x16(x, max_blocks_high, max_blocks_wide, num_4x4_w, + step, block_step); + } + + const SCAN_ORDER *const scan_order = &av1_scan_orders[tx_size][DCT_DCT]; + DECLARE_BLOCK_YRD_BUFFERS() + DECLARE_BLOCK_YRD_VARS() +#if CONFIG_AV1_HIGHBITDEPTH + DECLARE_BLOCK_YRD_HBD_VARS() +#else + (void)use_hbd; +#endif + + // Keep track of the row and column of the blocks we use so that we know + // if we are in the unrestricted motion border. + for (int r = 0; r < max_blocks_high; r += block_step) { + for (int c = 0, s = 0; c < max_blocks_wide; c += block_step, s += step) { + DECLARE_LOOP_VARS_BLOCK_YRD() + + switch (tx_size) { +#if CONFIG_AV1_HIGHBITDEPTH + case TX_16X16: + if (use_hbd) { + aom_hadamard_16x16(src_diff, diff_stride, coeff); + av1_quantize_fp(coeff, 16 * 16, p->zbin_QTX, p->round_fp_QTX, + p->quant_fp_QTX, p->quant_shift_QTX, qcoeff, + dqcoeff, p->dequant_QTX, eob, + // default_scan_fp_16x16_transpose and + // av1_default_iscan_fp_16x16_transpose have to be + // used together. + default_scan_fp_16x16_transpose, + av1_default_iscan_fp_16x16_transpose); + } else { + aom_hadamard_lp_16x16(src_diff, diff_stride, low_coeff); + av1_quantize_lp(low_coeff, 16 * 16, p->round_fp_QTX, + p->quant_fp_QTX, low_qcoeff, low_dqcoeff, + p->dequant_QTX, eob, + // default_scan_lp_16x16_transpose and + // av1_default_iscan_lp_16x16_transpose have to be + // used together. + default_scan_lp_16x16_transpose, + av1_default_iscan_lp_16x16_transpose); + } + break; + case TX_8X8: + if (use_hbd) { + aom_hadamard_8x8(src_diff, diff_stride, coeff); + av1_quantize_fp( + coeff, 8 * 8, p->zbin_QTX, p->round_fp_QTX, p->quant_fp_QTX, + p->quant_shift_QTX, qcoeff, dqcoeff, p->dequant_QTX, eob, + default_scan_8x8_transpose, av1_default_iscan_8x8_transpose); + } else { + if (is_tx_8x8_dual_applicable) { + // The coeffs are pre-computed for the whole block, so re-assign + // low_coeff to the appropriate location. + const int block_offset = BLOCK_OFFSET(block + s); + low_coeff = (int16_t *)p->coeff + block_offset; + } else { + aom_hadamard_lp_8x8(src_diff, diff_stride, low_coeff); + } + av1_quantize_lp( + low_coeff, 8 * 8, p->round_fp_QTX, p->quant_fp_QTX, low_qcoeff, + low_dqcoeff, p->dequant_QTX, eob, + // default_scan_8x8_transpose and + // av1_default_iscan_8x8_transpose have to be used together. + default_scan_8x8_transpose, av1_default_iscan_8x8_transpose); + } + break; + default: + assert(tx_size == TX_4X4); + // In tx_size=4x4 case, aom_fdct4x4 and aom_fdct4x4_lp generate + // normal coefficients order, so we don't need to change the scan + // order here. + if (use_hbd) { + aom_fdct4x4(src_diff, coeff, diff_stride); + av1_quantize_fp(coeff, 4 * 4, p->zbin_QTX, p->round_fp_QTX, + p->quant_fp_QTX, p->quant_shift_QTX, qcoeff, + dqcoeff, p->dequant_QTX, eob, scan_order->scan, + scan_order->iscan); + } else { + aom_fdct4x4_lp(src_diff, low_coeff, diff_stride); + av1_quantize_lp(low_coeff, 4 * 4, p->round_fp_QTX, p->quant_fp_QTX, + low_qcoeff, low_dqcoeff, p->dequant_QTX, eob, + scan_order->scan, scan_order->iscan); + } + break; +#else + case TX_16X16: + aom_hadamard_lp_16x16(src_diff, diff_stride, low_coeff); + av1_quantize_lp(low_coeff, 16 * 16, p->round_fp_QTX, p->quant_fp_QTX, + low_qcoeff, low_dqcoeff, p->dequant_QTX, eob, + default_scan_lp_16x16_transpose, + av1_default_iscan_lp_16x16_transpose); + break; + case TX_8X8: + if (is_tx_8x8_dual_applicable) { + // The coeffs are pre-computed for the whole block, so re-assign + // low_coeff to the appropriate location. + const int block_offset = BLOCK_OFFSET(block + s); + low_coeff = (int16_t *)p->coeff + block_offset; + } else { + aom_hadamard_lp_8x8(src_diff, diff_stride, low_coeff); + } + av1_quantize_lp(low_coeff, 8 * 8, p->round_fp_QTX, p->quant_fp_QTX, + low_qcoeff, low_dqcoeff, p->dequant_QTX, eob, + default_scan_8x8_transpose, + av1_default_iscan_8x8_transpose); + break; + default: + aom_fdct4x4_lp(src_diff, low_coeff, diff_stride); + av1_quantize_lp(low_coeff, 4 * 4, p->round_fp_QTX, p->quant_fp_QTX, + low_qcoeff, low_dqcoeff, p->dequant_QTX, eob, + scan_order->scan, scan_order->iscan); + break; +#endif + } + assert(*eob <= 1024); +#if CONFIG_AV1_HIGHBITDEPTH + if (use_hbd) + update_yrd_loop_vars_hbd(x, &temp_skippable, step, *eob, coeff, qcoeff, + dqcoeff, this_rdc, &eob_cost, + r * num_blk_skip_w + c); + else +#endif + update_yrd_loop_vars(x, &temp_skippable, step, *eob, low_coeff, + low_qcoeff, low_dqcoeff, this_rdc, &eob_cost, + r * num_blk_skip_w + c); + } + block += row_step; + } + + this_rdc->skip_txfm = *skippable = temp_skippable; + if (this_rdc->sse < INT64_MAX) { + this_rdc->sse = (this_rdc->sse << 6) >> 2; + if (temp_skippable) { + this_rdc->dist = 0; + this_rdc->dist = this_rdc->sse; + return; + } + } + + // If skippable is set, rate gets clobbered later. + this_rdc->rate <<= (2 + AV1_PROB_COST_SHIFT); + this_rdc->rate += (eob_cost << AV1_PROB_COST_SHIFT); +} + +// Explicitly enumerate the cases so the compiler can generate SIMD for the +// function. According to the disassembler, gcc generates SSE codes for each of +// the possible block sizes. The hottest case is tx_width 16, which takes up +// about 8% of the self cycle of av1_nonrd_pick_inter_mode_sb. Since +// av1_nonrd_pick_inter_mode_sb takes up about 3% of total encoding time, the +// potential room of improvement for writing AVX2 optimization is only 3% * 8% = +// 0.24% of total encoding time. +static AOM_INLINE void scale_square_buf_vals(int16_t *dst, int tx_width, + const int16_t *src, + int src_stride) { +#define DO_SCALING \ + do { \ + for (int idy = 0; idy < tx_width; ++idy) { \ + for (int idx = 0; idx < tx_width; ++idx) { \ + dst[idy * tx_width + idx] = src[idy * src_stride + idx] * 8; \ + } \ + } \ + } while (0) + + if (tx_width == 4) { + DO_SCALING; + } else if (tx_width == 8) { + DO_SCALING; + } else if (tx_width == 16) { + DO_SCALING; + } else { + assert(0); + } + +#undef DO_SCALING +} + +/*!\brief Calculates RD Cost when the block uses Identity transform. + * Note that this function is only for low bit depth encoding, since it + * is called in real-time mode for now, which sets high bit depth to 0: + * -DCONFIG_AV1_HIGHBITDEPTH=0 + * + * \ingroup nonrd_mode_search + * \callgraph + * \callergraph + * Calculates RD Cost. For low bit depth this function + * uses low-precision set of functions (16-bit) and 32 bit for high bit depth + * \param[in] x Pointer to structure holding all the data for + the current macroblock + * \param[in] pred_buf Pointer to the prediction buffer + * \param[in] pred_stride Stride for the prediction buffer + * \param[in] this_rdc Pointer to calculated RD Cost + * \param[in] skippable Pointer to a flag indicating possible tx skip + * \param[in] bsize Current block size + * \param[in] tx_size Transform size + * + * \remark Nothing is returned. Instead, calculated RD cost is placed to + * \c this_rdc. \c skippable flag is set if all coefficients are zero. + */ +void av1_block_yrd_idtx(MACROBLOCK *x, const uint8_t *const pred_buf, + int pred_stride, RD_STATS *this_rdc, int *skippable, + BLOCK_SIZE bsize, TX_SIZE tx_size) { + MACROBLOCKD *xd = &x->e_mbd; + struct macroblock_plane *const p = &x->plane[AOM_PLANE_Y]; + assert(bsize < BLOCK_SIZES_ALL); + const int num_4x4_w = mi_size_wide[bsize]; + const int num_4x4_h = mi_size_high[bsize]; + const int step = 1 << (tx_size << 1); + const int block_step = (1 << tx_size); + const int max_blocks_wide = + num_4x4_w + (xd->mb_to_right_edge >= 0 ? 0 : xd->mb_to_right_edge >> 5); + const int max_blocks_high = + num_4x4_h + (xd->mb_to_bottom_edge >= 0 ? 0 : xd->mb_to_bottom_edge >> 5); + int eob_cost = 0; + const int bw = 4 * num_4x4_w; + const int bh = 4 * num_4x4_h; + const int num_blk_skip_w = num_4x4_w; + // Keep the intermediate value on the stack here. Writing directly to + // skippable causes speed regression due to load-and-store issues in + // update_yrd_loop_vars. + int temp_skippable = 1; + int tx_wd = 0; + const SCAN_ORDER *scan_order = NULL; + switch (tx_size) { + case TX_64X64: + assert(0); // Not implemented + break; + case TX_32X32: + assert(0); // Not used + break; + case TX_16X16: + scan_order = &av1_fast_idtx_scan_order_16x16; + tx_wd = 16; + break; + case TX_8X8: + scan_order = &av1_fast_idtx_scan_order_8x8; + tx_wd = 8; + break; + default: + assert(tx_size == TX_4X4); + scan_order = &av1_fast_idtx_scan_order_4x4; + tx_wd = 4; + break; + } + assert(scan_order != NULL); + + this_rdc->dist = 0; + this_rdc->rate = 0; + aom_subtract_block(bh, bw, p->src_diff, bw, p->src.buf, p->src.stride, + pred_buf, pred_stride); + // Keep track of the row and column of the blocks we use so that we know + // if we are in the unrestricted motion border. + DECLARE_BLOCK_YRD_BUFFERS() + DECLARE_BLOCK_YRD_VARS() + for (int r = 0; r < max_blocks_high; r += block_step) { + for (int c = 0, s = 0; c < max_blocks_wide; c += block_step, s += step) { + DECLARE_LOOP_VARS_BLOCK_YRD() + scale_square_buf_vals(low_coeff, tx_wd, src_diff, diff_stride); + av1_quantize_lp(low_coeff, tx_wd * tx_wd, p->round_fp_QTX, + p->quant_fp_QTX, low_qcoeff, low_dqcoeff, p->dequant_QTX, + eob, scan_order->scan, scan_order->iscan); + assert(*eob <= 1024); + update_yrd_loop_vars(x, &temp_skippable, step, *eob, low_coeff, + low_qcoeff, low_dqcoeff, this_rdc, &eob_cost, + r * num_blk_skip_w + c); + } + } + this_rdc->skip_txfm = *skippable = temp_skippable; + if (this_rdc->sse < INT64_MAX) { + this_rdc->sse = (this_rdc->sse << 6) >> 2; + if (temp_skippable) { + this_rdc->dist = 0; + this_rdc->dist = this_rdc->sse; + return; + } + } + // If skippable is set, rate gets clobbered later. + this_rdc->rate <<= (2 + AV1_PROB_COST_SHIFT); + this_rdc->rate += (eob_cost << AV1_PROB_COST_SHIFT); +} + +int64_t av1_model_rd_for_sb_uv(AV1_COMP *cpi, BLOCK_SIZE plane_bsize, + MACROBLOCK *x, MACROBLOCKD *xd, + RD_STATS *this_rdc, int start_plane, + int stop_plane) { + // Note our transform coeffs are 8 times an orthogonal transform. + // Hence quantizer step is also 8 times. To get effective quantizer + // we need to divide by 8 before sending to modeling function. + unsigned int sse; + int rate; + int64_t dist; + int plane; + int64_t tot_sse = 0; + + this_rdc->rate = 0; + this_rdc->dist = 0; + this_rdc->skip_txfm = 0; + + for (plane = start_plane; plane <= stop_plane; ++plane) { + struct macroblock_plane *const p = &x->plane[plane]; + struct macroblockd_plane *const pd = &xd->plane[plane]; + const uint32_t dc_quant = p->dequant_QTX[0]; + const uint32_t ac_quant = p->dequant_QTX[1]; + const BLOCK_SIZE bs = plane_bsize; + unsigned int var; + if (!x->color_sensitivity[COLOR_SENS_IDX(plane)]) continue; + + var = cpi->ppi->fn_ptr[bs].vf(p->src.buf, p->src.stride, pd->dst.buf, + pd->dst.stride, &sse); + assert(sse >= var); + tot_sse += sse; + + av1_model_rd_from_var_lapndz(sse - var, num_pels_log2_lookup[bs], + dc_quant >> 3, &rate, &dist); + + this_rdc->rate += rate >> 1; + this_rdc->dist += dist << 3; + + av1_model_rd_from_var_lapndz(var, num_pels_log2_lookup[bs], ac_quant >> 3, + &rate, &dist); + + this_rdc->rate += rate; + this_rdc->dist += dist << 4; + } + + if (this_rdc->rate == 0) { + this_rdc->skip_txfm = 1; + } + + if (RDCOST(x->rdmult, this_rdc->rate, this_rdc->dist) >= + RDCOST(x->rdmult, 0, tot_sse << 4)) { + this_rdc->rate = 0; + this_rdc->dist = tot_sse << 4; + this_rdc->skip_txfm = 1; + } + + return tot_sse; +} + +static void compute_intra_yprediction(const AV1_COMMON *cm, + PREDICTION_MODE mode, BLOCK_SIZE bsize, + MACROBLOCK *x, MACROBLOCKD *xd) { + const SequenceHeader *seq_params = cm->seq_params; + struct macroblockd_plane *const pd = &xd->plane[AOM_PLANE_Y]; + struct macroblock_plane *const p = &x->plane[AOM_PLANE_Y]; + uint8_t *const src_buf_base = p->src.buf; + uint8_t *const dst_buf_base = pd->dst.buf; + const int src_stride = p->src.stride; + const int dst_stride = pd->dst.stride; + int plane = 0; + int row, col; + // block and transform sizes, in number of 4x4 blocks log 2 ("*_b") + // 4x4=0, 8x8=2, 16x16=4, 32x32=6, 64x64=8 + // transform size varies per plane, look it up in a common way. + const TX_SIZE tx_size = max_txsize_lookup[bsize]; + const BLOCK_SIZE plane_bsize = + get_plane_block_size(bsize, pd->subsampling_x, pd->subsampling_y); + // If mb_to_right_edge is < 0 we are in a situation in which + // the current block size extends into the UMV and we won't + // visit the sub blocks that are wholly within the UMV. + const int max_blocks_wide = max_block_wide(xd, plane_bsize, plane); + const int max_blocks_high = max_block_high(xd, plane_bsize, plane); + // Keep track of the row and column of the blocks we use so that we know + // if we are in the unrestricted motion border. + for (row = 0; row < max_blocks_high; row += (1 << tx_size)) { + // Skip visiting the sub blocks that are wholly within the UMV. + for (col = 0; col < max_blocks_wide; col += (1 << tx_size)) { + p->src.buf = &src_buf_base[4 * (row * (int64_t)src_stride + col)]; + pd->dst.buf = &dst_buf_base[4 * (row * (int64_t)dst_stride + col)]; + av1_predict_intra_block( + xd, seq_params->sb_size, seq_params->enable_intra_edge_filter, + block_size_wide[bsize], block_size_high[bsize], tx_size, mode, 0, 0, + FILTER_INTRA_MODES, pd->dst.buf, dst_stride, pd->dst.buf, dst_stride, + 0, 0, plane); + } + } + p->src.buf = src_buf_base; + pd->dst.buf = dst_buf_base; +} + +// Checks whether Intra mode needs to be pruned based on +// 'intra_y_mode_bsize_mask_nrd' and 'prune_hv_pred_modes_using_blksad' +// speed features. +static INLINE bool is_prune_intra_mode( + AV1_COMP *cpi, int mode_index, int force_intra_check, BLOCK_SIZE bsize, + uint8_t segment_id, SOURCE_SAD source_sad_nonrd, + uint8_t color_sensitivity[MAX_MB_PLANE - 1]) { + const PREDICTION_MODE this_mode = intra_mode_list[mode_index]; + if (mode_index > 2 || force_intra_check == 0) { + if (!((1 << this_mode) & cpi->sf.rt_sf.intra_y_mode_bsize_mask_nrd[bsize])) + return true; + + if (this_mode == DC_PRED) return false; + + if (!cpi->sf.rt_sf.prune_hv_pred_modes_using_src_sad) return false; + + const bool has_color_sensitivity = + color_sensitivity[COLOR_SENS_IDX(AOM_PLANE_U)] && + color_sensitivity[COLOR_SENS_IDX(AOM_PLANE_V)]; + if (has_color_sensitivity && + (cpi->rc.frame_source_sad > 1.1 * cpi->rc.avg_source_sad || + cyclic_refresh_segment_id_boosted(segment_id) || + source_sad_nonrd > kMedSad)) + return false; + + return true; + } + return false; +} + +/*!\brief Estimation of RD cost of an intra mode for Non-RD optimized case. + * + * \ingroup nonrd_mode_search + * \callgraph + * \callergraph + * Calculates RD Cost for an intra mode for a single TX block using Hadamard + * transform. + * \param[in] plane Color plane + * \param[in] block Index of a TX block in a prediction block + * \param[in] row Row of a current TX block + * \param[in] col Column of a current TX block + * \param[in] plane_bsize Block size of a current prediction block + * \param[in] tx_size Transform size + * \param[in] arg Pointer to a structure that holds parameters + * for intra mode search + * + * \remark Nothing is returned. Instead, best mode and RD Cost of the best mode + * are set in \c args->rdc and \c args->mode + */ +void av1_estimate_block_intra(int plane, int block, int row, int col, + BLOCK_SIZE plane_bsize, TX_SIZE tx_size, + void *arg) { + struct estimate_block_intra_args *const args = arg; + AV1_COMP *const cpi = args->cpi; + AV1_COMMON *const cm = &cpi->common; + MACROBLOCK *const x = args->x; + MACROBLOCKD *const xd = &x->e_mbd; + struct macroblock_plane *const p = &x->plane[plane]; + struct macroblockd_plane *const pd = &xd->plane[plane]; + const BLOCK_SIZE bsize_tx = txsize_to_bsize[tx_size]; + uint8_t *const src_buf_base = p->src.buf; + uint8_t *const dst_buf_base = pd->dst.buf; + const int64_t src_stride = p->src.stride; + const int64_t dst_stride = pd->dst.stride; + + (void)block; + + av1_predict_intra_block_facade(cm, xd, plane, col, row, tx_size); + + if (args->prune_mode_based_on_sad) { + unsigned int this_sad = cpi->ppi->fn_ptr[plane_bsize].sdf( + p->src.buf, p->src.stride, pd->dst.buf, pd->dst.stride); + const unsigned int sad_threshold = + args->best_sad != UINT_MAX ? args->best_sad + (args->best_sad >> 4) + : UINT_MAX; + // Skip the evaluation of current mode if its SAD is more than a threshold. + if (this_sad > sad_threshold) { + // For the current mode, set rate and distortion to maximum possible + // values and return. + // Note: args->rdc->rate is checked in av1_nonrd_pick_intra_mode() to skip + // the evaluation of the current mode. + args->rdc->rate = INT_MAX; + args->rdc->dist = INT64_MAX; + return; + } + if (this_sad < args->best_sad) { + args->best_sad = this_sad; + } + } + + RD_STATS this_rdc; + av1_invalid_rd_stats(&this_rdc); + + p->src.buf = &src_buf_base[4 * (row * src_stride + col)]; + pd->dst.buf = &dst_buf_base[4 * (row * dst_stride + col)]; + + if (plane == 0) { + av1_block_yrd(x, &this_rdc, &args->skippable, bsize_tx, + AOMMIN(tx_size, TX_16X16)); + } else { + av1_model_rd_for_sb_uv(cpi, bsize_tx, x, xd, &this_rdc, plane, plane); + } + + p->src.buf = src_buf_base; + pd->dst.buf = dst_buf_base; + assert(args->rdc->rate != INT_MAX && args->rdc->dist != INT64_MAX); + args->rdc->rate += this_rdc.rate; + args->rdc->dist += this_rdc.dist; +} + +/*!\brief Estimates best intra mode for inter mode search + * + * \ingroup nonrd_mode_search + * \callgraph + * \callergraph + * + * Using heuristics based on best inter mode, block size, and other decides + * whether to check intra modes. If so, estimates and selects best intra mode + * from the reduced set of intra modes (max 4 intra modes checked) + * + * \param[in] cpi Top-level encoder structure + * \param[in] x Pointer to structure holding all the + * data for the current macroblock + * \param[in] bsize Current block size + * \param[in] best_early_term Flag, indicating that TX for the + * best inter mode was skipped + * \param[in] ref_cost_intra Cost of signalling intra mode + * \param[in] reuse_prediction Flag, indicating prediction re-use + * \param[in] orig_dst Original destination buffer + * \param[in] tmp_buffers Pointer to a temporary buffers for + * prediction re-use + * \param[out] this_mode_pred Pointer to store prediction buffer + * for prediction re-use + * \param[in] best_rdc Pointer to RD cost for the best + * selected intra mode + * \param[in] best_pickmode Pointer to a structure containing + * best mode picked so far + * \param[in] ctx Pointer to structure holding coding + * contexts and modes for the block + * + * \remark Nothing is returned. Instead, calculated RD cost is placed to + * \c best_rdc and best selected mode is placed to \c best_pickmode + * + */ +void av1_estimate_intra_mode(AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bsize, + int best_early_term, unsigned int ref_cost_intra, + int reuse_prediction, struct buf_2d *orig_dst, + PRED_BUFFER *tmp_buffers, + PRED_BUFFER **this_mode_pred, RD_STATS *best_rdc, + BEST_PICKMODE *best_pickmode, + PICK_MODE_CONTEXT *ctx) { + AV1_COMMON *const cm = &cpi->common; + MACROBLOCKD *const xd = &x->e_mbd; + MB_MODE_INFO *const mi = xd->mi[0]; + const TxfmSearchParams *txfm_params = &x->txfm_search_params; + const unsigned char segment_id = mi->segment_id; + const int *const rd_threshes = cpi->rd.threshes[segment_id][bsize]; + const int *const rd_thresh_freq_fact = x->thresh_freq_fact[bsize]; + const bool is_screen_content = + cpi->oxcf.tune_cfg.content == AOM_CONTENT_SCREEN; + struct macroblockd_plane *const pd = &xd->plane[AOM_PLANE_Y]; + const REAL_TIME_SPEED_FEATURES *const rt_sf = &cpi->sf.rt_sf; + + const CommonQuantParams *quant_params = &cm->quant_params; + + RD_STATS this_rdc; + + int intra_cost_penalty = av1_get_intra_cost_penalty( + quant_params->base_qindex, quant_params->y_dc_delta_q, + cm->seq_params->bit_depth); + int64_t inter_mode_thresh = + RDCOST(x->rdmult, ref_cost_intra + intra_cost_penalty, 0); + int perform_intra_pred = rt_sf->check_intra_pred_nonrd; + int force_intra_check = 0; + // For spatial enhancement layer: turn off intra prediction if the + // previous spatial layer as golden ref is not chosen as best reference. + // only do this for temporal enhancement layer and on non-key frames. + if (cpi->svc.spatial_layer_id > 0 && + best_pickmode->best_ref_frame != GOLDEN_FRAME && + cpi->svc.temporal_layer_id > 0 && + !cpi->svc.layer_context[cpi->svc.temporal_layer_id].is_key_frame) + perform_intra_pred = 0; + + int do_early_exit_rdthresh = 1; + + uint32_t spatial_var_thresh = 50; + int motion_thresh = 32; + // Adjust thresholds to make intra mode likely tested if the other + // references (golden, alt) are skipped/not checked. For now always + // adjust for svc mode. + if (cpi->ppi->use_svc || (rt_sf->use_nonrd_altref_frame == 0 && + rt_sf->nonrd_prune_ref_frame_search > 0)) { + spatial_var_thresh = 150; + motion_thresh = 0; + } + + // Some adjustments to checking intra mode based on source variance. + if (x->source_variance < spatial_var_thresh) { + // If the best inter mode is large motion or non-LAST ref reduce intra cost + // penalty, so intra mode is more likely tested. + if (best_rdc->rdcost != INT64_MAX && + (best_pickmode->best_ref_frame != LAST_FRAME || + abs(mi->mv[0].as_mv.row) >= motion_thresh || + abs(mi->mv[0].as_mv.col) >= motion_thresh)) { + intra_cost_penalty = intra_cost_penalty >> 2; + inter_mode_thresh = + RDCOST(x->rdmult, ref_cost_intra + intra_cost_penalty, 0); + do_early_exit_rdthresh = 0; + } + if ((x->source_variance < AOMMAX(50, (spatial_var_thresh >> 1)) && + x->content_state_sb.source_sad_nonrd >= kHighSad) || + (is_screen_content && x->source_variance < 50 && + ((bsize >= BLOCK_32X32 && + x->content_state_sb.source_sad_nonrd != kZeroSad) || + x->color_sensitivity[COLOR_SENS_IDX(AOM_PLANE_U)] == 1 || + x->color_sensitivity[COLOR_SENS_IDX(AOM_PLANE_V)] == 1))) + force_intra_check = 1; + // For big blocks worth checking intra (since only DC will be checked), + // even if best_early_term is set. + if (bsize >= BLOCK_32X32) best_early_term = 0; + } else if (rt_sf->source_metrics_sb_nonrd && + x->content_state_sb.source_sad_nonrd <= kLowSad) { + perform_intra_pred = 0; + } + + if (best_rdc->skip_txfm && best_pickmode->best_mode_initial_skip_flag) { + if (rt_sf->skip_intra_pred == 1 && best_pickmode->best_mode != NEWMV) + perform_intra_pred = 0; + else if (rt_sf->skip_intra_pred == 2) + perform_intra_pred = 0; + } + + if (!(best_rdc->rdcost == INT64_MAX || force_intra_check || + (perform_intra_pred && !best_early_term && + bsize <= cpi->sf.part_sf.max_intra_bsize))) { + return; + } + + // Early exit based on RD cost calculated using known rate. When + // is_screen_content is true, more bias is given to intra modes. Hence, + // considered conservative threshold in early exit for the same. + const int64_t known_rd = is_screen_content + ? CALC_BIASED_RDCOST(inter_mode_thresh) + : inter_mode_thresh; + if (known_rd > best_rdc->rdcost) return; + + struct estimate_block_intra_args args; + init_estimate_block_intra_args(&args, cpi, x); + TX_SIZE intra_tx_size = AOMMIN( + AOMMIN(max_txsize_lookup[bsize], + tx_mode_to_biggest_tx_size[txfm_params->tx_mode_search_type]), + TX_16X16); + if (is_screen_content && cpi->rc.high_source_sad && + x->source_variance > spatial_var_thresh && bsize <= BLOCK_16X16) + intra_tx_size = TX_4X4; + + PRED_BUFFER *const best_pred = best_pickmode->best_pred; + if (reuse_prediction && best_pred != NULL) { + const int bh = block_size_high[bsize]; + const int bw = block_size_wide[bsize]; + if (best_pred->data == orig_dst->buf) { + *this_mode_pred = &tmp_buffers[get_pred_buffer(tmp_buffers, 3)]; + aom_convolve_copy(best_pred->data, best_pred->stride, + (*this_mode_pred)->data, (*this_mode_pred)->stride, bw, + bh); + best_pickmode->best_pred = *this_mode_pred; + } + } + pd->dst = *orig_dst; + + for (int midx = 0; midx < RTC_INTRA_MODES; ++midx) { + const PREDICTION_MODE this_mode = intra_mode_list[midx]; + const THR_MODES mode_index = mode_idx[INTRA_FRAME][mode_offset(this_mode)]; + const int64_t mode_rd_thresh = rd_threshes[mode_index]; + + if (is_prune_intra_mode(cpi, midx, force_intra_check, bsize, segment_id, + x->content_state_sb.source_sad_nonrd, + x->color_sensitivity)) + continue; + + if (is_screen_content && rt_sf->source_metrics_sb_nonrd) { + // For spatially flat blocks with zero motion only check + // DC mode. + if (x->content_state_sb.source_sad_nonrd == kZeroSad && + x->source_variance == 0 && this_mode != DC_PRED) + continue; + // Only test Intra for big blocks if spatial_variance is small. + else if (bsize > BLOCK_32X32 && x->source_variance > 50) + continue; + } + + if (rd_less_than_thresh(best_rdc->rdcost, mode_rd_thresh, + rd_thresh_freq_fact[mode_index]) && + (do_early_exit_rdthresh || this_mode == SMOOTH_PRED)) { + continue; + } + const BLOCK_SIZE uv_bsize = + get_plane_block_size(bsize, xd->plane[AOM_PLANE_U].subsampling_x, + xd->plane[AOM_PLANE_U].subsampling_y); + + mi->mode = this_mode; + mi->ref_frame[0] = INTRA_FRAME; + mi->ref_frame[1] = NONE_FRAME; + + av1_invalid_rd_stats(&this_rdc); + args.mode = this_mode; + args.skippable = 1; + args.rdc = &this_rdc; + mi->tx_size = intra_tx_size; + compute_intra_yprediction(cm, this_mode, bsize, x, xd); + // Look into selecting tx_size here, based on prediction residual. + av1_block_yrd(x, &this_rdc, &args.skippable, bsize, mi->tx_size); + // TODO(kyslov@) Need to account for skippable + if (x->color_sensitivity[COLOR_SENS_IDX(AOM_PLANE_U)]) { + av1_foreach_transformed_block_in_plane(xd, uv_bsize, AOM_PLANE_U, + av1_estimate_block_intra, &args); + } + if (x->color_sensitivity[COLOR_SENS_IDX(AOM_PLANE_V)]) { + av1_foreach_transformed_block_in_plane(xd, uv_bsize, AOM_PLANE_V, + av1_estimate_block_intra, &args); + } + + int mode_cost = 0; + if (av1_is_directional_mode(this_mode) && av1_use_angle_delta(bsize)) { + mode_cost += + x->mode_costs.angle_delta_cost[this_mode - V_PRED] + [MAX_ANGLE_DELTA + + mi->angle_delta[PLANE_TYPE_Y]]; + } + if (this_mode == DC_PRED && av1_filter_intra_allowed_bsize(cm, bsize)) { + mode_cost += x->mode_costs.filter_intra_cost[bsize][0]; + } + this_rdc.rate += ref_cost_intra; + this_rdc.rate += intra_cost_penalty; + this_rdc.rate += mode_cost; + this_rdc.rdcost = RDCOST(x->rdmult, this_rdc.rate, this_rdc.dist); + + if (is_screen_content && rt_sf->source_metrics_sb_nonrd) { + // For blocks with low spatial variance and color sad, + // favor the intra-modes, only on scene/slide change. + if (cpi->rc.high_source_sad && x->source_variance < 800 && + (x->color_sensitivity[COLOR_SENS_IDX(AOM_PLANE_U)] || + x->color_sensitivity[COLOR_SENS_IDX(AOM_PLANE_V)])) + this_rdc.rdcost = CALC_BIASED_RDCOST(this_rdc.rdcost); + // Otherwise bias against intra for blocks with zero + // motion and no color, on non-scene/slide changes. + else if (!cpi->rc.high_source_sad && x->source_variance > 0 && + x->content_state_sb.source_sad_nonrd == kZeroSad && + x->color_sensitivity[COLOR_SENS_IDX(AOM_PLANE_U)] == 0 && + x->color_sensitivity[COLOR_SENS_IDX(AOM_PLANE_V)] == 0) + this_rdc.rdcost = (3 * this_rdc.rdcost) >> 1; + } + + if (this_rdc.rdcost < best_rdc->rdcost) { + *best_rdc = this_rdc; + best_pickmode->best_mode = this_mode; + best_pickmode->best_tx_size = mi->tx_size; + best_pickmode->best_ref_frame = INTRA_FRAME; + best_pickmode->best_second_ref_frame = NONE; + best_pickmode->best_mode_skip_txfm = this_rdc.skip_txfm; + mi->uv_mode = this_mode; + mi->mv[0].as_int = INVALID_MV; + mi->mv[1].as_int = INVALID_MV; + if (!this_rdc.skip_txfm) + memset(ctx->blk_skip, 0, + sizeof(x->txfm_search_info.blk_skip[0]) * ctx->num_4x4_blk); + } + } + if (best_pickmode->best_ref_frame == INTRA_FRAME) + memset(ctx->blk_skip, 0, + sizeof(x->txfm_search_info.blk_skip[0]) * ctx->num_4x4_blk); + mi->tx_size = best_pickmode->best_tx_size; +} |