| /* |
| * 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 "./vpx_dsp_rtcd.h" |
| #include "./vpx_scale_rtcd.h" |
| #include "vp8/common/onyxc_int.h" |
| #include "onyx_int.h" |
| #include "vp8/encoder/quantize.h" |
| #include "vpx_mem/vpx_mem.h" |
| #include "vpx_scale/vpx_scale.h" |
| #include "vp8/common/alloccommon.h" |
| #include "vp8/common/loopfilter.h" |
| #if ARCH_ARM |
| #include "vpx_ports/arm.h" |
| #endif |
| |
| extern int vp8_calc_ss_err(YV12_BUFFER_CONFIG *source, YV12_BUFFER_CONFIG *dest); |
| |
| static void yv12_copy_partial_frame(YV12_BUFFER_CONFIG *src_ybc, |
| YV12_BUFFER_CONFIG *dst_ybc) |
| { |
| unsigned char *src_y, *dst_y; |
| int yheight; |
| int ystride; |
| int yoffset; |
| int linestocopy; |
| |
| yheight = src_ybc->y_height; |
| ystride = src_ybc->y_stride; |
| |
| /* number of MB rows to use in partial filtering */ |
| linestocopy = (yheight >> 4) / PARTIAL_FRAME_FRACTION; |
| linestocopy = linestocopy ? linestocopy << 4 : 16; /* 16 lines per MB */ |
| |
| /* Copy extra 4 so that full filter context is available if filtering done |
| * on the copied partial frame and not original. Partial filter does mb |
| * filtering for top row also, which can modify3 pixels above. |
| */ |
| linestocopy += 4; |
| /* partial image starts at ~middle of frame (macroblock border)*/ |
| yoffset = ystride * (((yheight >> 5) * 16) - 4); |
| src_y = src_ybc->y_buffer + yoffset; |
| dst_y = dst_ybc->y_buffer + yoffset; |
| |
| memcpy(dst_y, src_y, ystride * linestocopy); |
| } |
| |
| static int calc_partial_ssl_err(YV12_BUFFER_CONFIG *source, |
| YV12_BUFFER_CONFIG *dest) |
| { |
| int i, j; |
| int Total = 0; |
| int srcoffset, dstoffset; |
| unsigned char *src = source->y_buffer; |
| unsigned char *dst = dest->y_buffer; |
| |
| int linestocopy; |
| |
| /* number of MB rows to use in partial filtering */ |
| linestocopy = (source->y_height >> 4) / PARTIAL_FRAME_FRACTION; |
| linestocopy = linestocopy ? linestocopy << 4 : 16; /* 16 lines per MB */ |
| |
| |
| /* partial image starts at ~middle of frame (macroblock border)*/ |
| srcoffset = source->y_stride * ((dest->y_height >> 5) * 16); |
| dstoffset = dest->y_stride * ((dest->y_height >> 5) * 16); |
| |
| src += srcoffset; |
| dst += dstoffset; |
| |
| /* Loop through the Y plane raw and reconstruction data summing |
| * (square differences) |
| */ |
| for (i = 0; i < linestocopy; i += 16) |
| { |
| for (j = 0; j < source->y_width; j += 16) |
| { |
| unsigned int sse; |
| Total += vpx_mse16x16(src + j, source->y_stride, |
| dst + j, dest->y_stride, |
| &sse); |
| } |
| |
| src += 16 * source->y_stride; |
| dst += 16 * dest->y_stride; |
| } |
| |
| return Total; |
| } |
| |
| /* Enforce a minimum filter level based upon baseline Q */ |
| static int get_min_filter_level(VP8_COMP *cpi, int base_qindex) |
| { |
| int min_filter_level; |
| |
| if (cpi->source_alt_ref_active && cpi->common.refresh_golden_frame && |
| !cpi->common.refresh_alt_ref_frame) |
| min_filter_level = 0; |
| else |
| { |
| if (base_qindex <= 6) |
| min_filter_level = 0; |
| else if (base_qindex <= 16) |
| min_filter_level = 1; |
| else |
| min_filter_level = (base_qindex / 8); |
| } |
| |
| return min_filter_level; |
| } |
| |
| /* Enforce a maximum filter level based upon baseline Q */ |
| static int get_max_filter_level(VP8_COMP *cpi, int base_qindex) |
| { |
| /* PGW August 2006: Highest filter values almost always a bad idea */ |
| |
| /* jbb chg: 20100118 - not so any more with this overquant stuff allow |
| * high values with lots of intra coming in. |
| */ |
| int max_filter_level = MAX_LOOP_FILTER; |
| (void)base_qindex; |
| |
| if (cpi->twopass.section_intra_rating > 8) |
| max_filter_level = MAX_LOOP_FILTER * 3 / 4; |
| |
| return max_filter_level; |
| } |
| |
| void vp8cx_pick_filter_level_fast(YV12_BUFFER_CONFIG *sd, VP8_COMP *cpi) |
| { |
| VP8_COMMON *cm = &cpi->common; |
| |
| int best_err = 0; |
| int filt_err = 0; |
| int min_filter_level = get_min_filter_level(cpi, cm->base_qindex); |
| int max_filter_level = get_max_filter_level(cpi, cm->base_qindex); |
| int filt_val; |
| int best_filt_val; |
| YV12_BUFFER_CONFIG * saved_frame = cm->frame_to_show; |
| |
| /* Replace unfiltered frame buffer with a new one */ |
| cm->frame_to_show = &cpi->pick_lf_lvl_frame; |
| |
| if (cm->frame_type == KEY_FRAME) |
| cm->sharpness_level = 0; |
| else |
| cm->sharpness_level = cpi->oxcf.Sharpness; |
| |
| if (cm->sharpness_level != cm->last_sharpness_level) |
| { |
| vp8_loop_filter_update_sharpness(&cm->lf_info, cm->sharpness_level); |
| cm->last_sharpness_level = cm->sharpness_level; |
| } |
| |
| /* Start the search at the previous frame filter level unless it is |
| * now out of range. |
| */ |
| if (cm->filter_level < min_filter_level) |
| cm->filter_level = min_filter_level; |
| else if (cm->filter_level > max_filter_level) |
| cm->filter_level = max_filter_level; |
| |
| filt_val = cm->filter_level; |
| best_filt_val = filt_val; |
| |
| /* Get the err using the previous frame's filter value. */ |
| |
| /* Copy the unfiltered / processed recon buffer to the new buffer */ |
| yv12_copy_partial_frame(saved_frame, cm->frame_to_show); |
| vp8_loop_filter_partial_frame(cm, &cpi->mb.e_mbd, filt_val); |
| |
| best_err = calc_partial_ssl_err(sd, cm->frame_to_show); |
| |
| filt_val -= 1 + (filt_val > 10); |
| |
| /* Search lower filter levels */ |
| while (filt_val >= min_filter_level) |
| { |
| /* Apply the loop filter */ |
| yv12_copy_partial_frame(saved_frame, cm->frame_to_show); |
| vp8_loop_filter_partial_frame(cm, &cpi->mb.e_mbd, filt_val); |
| |
| /* Get the err for filtered frame */ |
| filt_err = calc_partial_ssl_err(sd, cm->frame_to_show); |
| |
| /* Update the best case record or exit loop. */ |
| if (filt_err < best_err) |
| { |
| best_err = filt_err; |
| best_filt_val = filt_val; |
| } |
| else |
| break; |
| |
| /* Adjust filter level */ |
| filt_val -= 1 + (filt_val > 10); |
| } |
| |
| /* Search up (note that we have already done filt_val = cm->filter_level) */ |
| filt_val = cm->filter_level + 1 + (filt_val > 10); |
| |
| if (best_filt_val == cm->filter_level) |
| { |
| /* Resist raising filter level for very small gains */ |
| best_err -= (best_err >> 10); |
| |
| while (filt_val < max_filter_level) |
| { |
| /* Apply the loop filter */ |
| yv12_copy_partial_frame(saved_frame, cm->frame_to_show); |
| |
| vp8_loop_filter_partial_frame(cm, &cpi->mb.e_mbd, filt_val); |
| |
| /* Get the err for filtered frame */ |
| filt_err = calc_partial_ssl_err(sd, cm->frame_to_show); |
| |
| /* Update the best case record or exit loop. */ |
| if (filt_err < best_err) |
| { |
| /* Do not raise filter level if improvement is < 1 part |
| * in 4096 |
| */ |
| best_err = filt_err - (filt_err >> 10); |
| |
| best_filt_val = filt_val; |
| } |
| else |
| break; |
| |
| /* Adjust filter level */ |
| filt_val += 1 + (filt_val > 10); |
| } |
| } |
| |
| cm->filter_level = best_filt_val; |
| |
| if (cm->filter_level < min_filter_level) |
| cm->filter_level = min_filter_level; |
| |
| if (cm->filter_level > max_filter_level) |
| cm->filter_level = max_filter_level; |
| |
| /* restore unfiltered frame pointer */ |
| cm->frame_to_show = saved_frame; |
| } |
| |
| /* Stub function for now Alt LF not used */ |
| void vp8cx_set_alt_lf_level(VP8_COMP *cpi, int filt_val) |
| { |
| MACROBLOCKD *mbd = &cpi->mb.e_mbd; |
| (void) filt_val; |
| |
| mbd->segment_feature_data[MB_LVL_ALT_LF][0] = cpi->segment_feature_data[MB_LVL_ALT_LF][0]; |
| mbd->segment_feature_data[MB_LVL_ALT_LF][1] = cpi->segment_feature_data[MB_LVL_ALT_LF][1]; |
| mbd->segment_feature_data[MB_LVL_ALT_LF][2] = cpi->segment_feature_data[MB_LVL_ALT_LF][2]; |
| mbd->segment_feature_data[MB_LVL_ALT_LF][3] = cpi->segment_feature_data[MB_LVL_ALT_LF][3]; |
| } |
| |
| void vp8cx_pick_filter_level(YV12_BUFFER_CONFIG *sd, VP8_COMP *cpi) |
| { |
| VP8_COMMON *cm = &cpi->common; |
| |
| int best_err = 0; |
| int filt_err = 0; |
| int min_filter_level = get_min_filter_level(cpi, cm->base_qindex); |
| int max_filter_level = get_max_filter_level(cpi, cm->base_qindex); |
| |
| int filter_step; |
| int filt_high = 0; |
| int filt_mid; |
| int filt_low = 0; |
| int filt_best; |
| int filt_direction = 0; |
| |
| /* Bias against raising loop filter and in favor of lowering it */ |
| int Bias = 0; |
| |
| int ss_err[MAX_LOOP_FILTER + 1]; |
| |
| YV12_BUFFER_CONFIG * saved_frame = cm->frame_to_show; |
| |
| memset(ss_err, 0, sizeof(ss_err)); |
| |
| /* Replace unfiltered frame buffer with a new one */ |
| cm->frame_to_show = &cpi->pick_lf_lvl_frame; |
| |
| if (cm->frame_type == KEY_FRAME) |
| cm->sharpness_level = 0; |
| else |
| cm->sharpness_level = cpi->oxcf.Sharpness; |
| |
| /* Start the search at the previous frame filter level unless it is |
| * now out of range. |
| */ |
| filt_mid = cm->filter_level; |
| |
| if (filt_mid < min_filter_level) |
| filt_mid = min_filter_level; |
| else if (filt_mid > max_filter_level) |
| filt_mid = max_filter_level; |
| |
| /* Define the initial step size */ |
| filter_step = (filt_mid < 16) ? 4 : filt_mid / 4; |
| |
| /* Get baseline error score */ |
| |
| /* Copy the unfiltered / processed recon buffer to the new buffer */ |
| vpx_yv12_copy_y(saved_frame, cm->frame_to_show); |
| |
| vp8cx_set_alt_lf_level(cpi, filt_mid); |
| vp8_loop_filter_frame_yonly(cm, &cpi->mb.e_mbd, filt_mid); |
| |
| best_err = vp8_calc_ss_err(sd, cm->frame_to_show); |
| |
| ss_err[filt_mid] = best_err; |
| |
| filt_best = filt_mid; |
| |
| while (filter_step > 0) |
| { |
| Bias = (best_err >> (15 - (filt_mid / 8))) * filter_step; |
| |
| if (cpi->twopass.section_intra_rating < 20) |
| Bias = Bias * cpi->twopass.section_intra_rating / 20; |
| |
| filt_high = ((filt_mid + filter_step) > max_filter_level) ? max_filter_level : (filt_mid + filter_step); |
| filt_low = ((filt_mid - filter_step) < min_filter_level) ? min_filter_level : (filt_mid - filter_step); |
| |
| if ((filt_direction <= 0) && (filt_low != filt_mid)) |
| { |
| if(ss_err[filt_low] == 0) |
| { |
| /* Get Low filter error score */ |
| vpx_yv12_copy_y(saved_frame, cm->frame_to_show); |
| vp8cx_set_alt_lf_level(cpi, filt_low); |
| vp8_loop_filter_frame_yonly(cm, &cpi->mb.e_mbd, filt_low); |
| |
| filt_err = vp8_calc_ss_err(sd, cm->frame_to_show); |
| ss_err[filt_low] = filt_err; |
| } |
| else |
| filt_err = ss_err[filt_low]; |
| |
| /* If value is close to the best so far then bias towards a |
| * lower loop filter value. |
| */ |
| if ((filt_err - Bias) < best_err) |
| { |
| /* Was it actually better than the previous best? */ |
| if (filt_err < best_err) |
| best_err = filt_err; |
| |
| filt_best = filt_low; |
| } |
| } |
| |
| /* Now look at filt_high */ |
| if ((filt_direction >= 0) && (filt_high != filt_mid)) |
| { |
| if(ss_err[filt_high] == 0) |
| { |
| vpx_yv12_copy_y(saved_frame, cm->frame_to_show); |
| vp8cx_set_alt_lf_level(cpi, filt_high); |
| vp8_loop_filter_frame_yonly(cm, &cpi->mb.e_mbd, filt_high); |
| |
| filt_err = vp8_calc_ss_err(sd, cm->frame_to_show); |
| ss_err[filt_high] = filt_err; |
| } |
| else |
| filt_err = ss_err[filt_high]; |
| |
| /* Was it better than the previous best? */ |
| if (filt_err < (best_err - Bias)) |
| { |
| best_err = filt_err; |
| filt_best = filt_high; |
| } |
| } |
| |
| /* Half the step distance if the best filter value was the same |
| * as last time |
| */ |
| if (filt_best == filt_mid) |
| { |
| filter_step = filter_step / 2; |
| filt_direction = 0; |
| } |
| else |
| { |
| filt_direction = (filt_best < filt_mid) ? -1 : 1; |
| filt_mid = filt_best; |
| } |
| } |
| |
| cm->filter_level = filt_best; |
| |
| /* restore unfiltered frame pointer */ |
| cm->frame_to_show = saved_frame; |
| } |
