Move libvpx from DEPS to src

third_party/libvpx/source/libvpx/vp8/encoder/picklpf.c

Index: third_party/libvpx/source/libvpx/vp8/encoder/picklpf.c
diff --git a/third_party/libvpx/source/libvpx/vp8/encoder/picklpf.c b/third_party/libvpx/source/libvpx/vp8/encoder/picklpf.c
new file mode 100644
index 0000000000000000000000000000000000000000..890053dcfdc5a8c753aade8a8864871398bd18b8
--- /dev/null
+++ b/third_party/libvpx/source/libvpx/vp8/encoder/picklpf.c
@@ -0,0 +1,406 @@
+/*
+ *  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_scale_rtcd.h"
+#include "vp8/common/onyxc_int.h"
+#include "onyx_int.h"
+#include "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 += vp8_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;
+}