third_party/libdav1d/src/fg_apply_tmpl.c - cobalt - Git at Google

 /*
  * Copyright © 2018, Niklas Haas
  * Copyright © 2018, VideoLAN and dav1d authors
  * Copyright © 2018, Two Orioles, LLC
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright notice, this
  *    list of conditions and the following disclaimer.
  *
  * 2. Redistributions in binary form must reproduce the above copyright notice,
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "config.h"

 #include <stdint.h>

 #include "dav1d/picture.h"

 #include "common.h"
 #include "common/intops.h"
 #include "common/bitdepth.h"

 #include "fg_apply.h"

 static void generate_scaling(const int bitdepth,
                              const uint8_t points[][2], const int num,
                              uint8_t scaling[SCALING_SIZE])
 {
 #if BITDEPTH == 8
     const int shift_x = 0;
 #else
     const int shift_x = bitdepth - 8;
 #endif
     const int scaling_size = 1 << bitdepth;

     // Fill up the preceding entries with the initial value
     for (int i = 0; i < points[0][0] << shift_x; i++)
         scaling[i] = points[0][1];

     // Linearly interpolate the values in the middle
     for (int i = 0; i < num - 1; i++) {
         const int bx = points[i][0];
         const int by = points[i][1];
         const int ex = points[i+1][0];
         const int ey = points[i+1][1];
         const int dx = ex - bx;
         const int dy = ey - by;
         const int delta = dy * ((0x10000 + (dx >> 1)) / dx);
         for (int x = 0; x < dx; x++) {
             const int v = by + ((x * delta + 0x8000) >> 16);
             scaling[(bx + x) << shift_x] = v;
         }
     }

     // Fill up the remaining entries with the final value
     for (int i = points[num - 1][0] << shift_x; i < scaling_size; i++)
         scaling[i] = points[num - 1][1];

 #if BITDEPTH != 8
     const int pad = 1 << shift_x, rnd = pad >> 1;
     for (int i = 0; i < num - 1; i++) {
         const int bx = points[i][0] << shift_x;
         const int ex = points[i+1][0] << shift_x;
         const int dx = ex - bx;
         for (int x = 0; x < dx; x += pad) {
             const int range = scaling[bx + x + pad] - scaling[bx + x];
             for (int n = 1; n < pad; n++) {
                 scaling[bx + x + n] = scaling[bx + x] + ((range * n + rnd) >> shift_x);
             }
         }
     }
 #endif
 }

 #ifndef UNIT_TEST
 void bitfn(dav1d_apply_grain)(const Dav1dFilmGrainDSPContext *const dsp,
                               Dav1dPicture *const out,
                               Dav1dPicture *const in)
 {
     const Dav1dFilmGrainData *const data = &out->frame_hdr->film_grain.data;

     entry grain_lut[3][GRAIN_HEIGHT + 1][GRAIN_WIDTH];
     uint8_t scaling[3][SCALING_SIZE];
 #if BITDEPTH != 8
     const int bitdepth_max = (1 << out->p.bpc) - 1;
 #endif

     // Generate grain LUTs as needed
     dsp->generate_grain_y(grain_lut[0], data HIGHBD_TAIL_SUFFIX); // always needed
     if (data->num_uv_points[0] || data->chroma_scaling_from_luma)
         dsp->generate_grain_uv[in->p.layout - 1](grain_lut[1], grain_lut[0],
                                                  data, 0 HIGHBD_TAIL_SUFFIX);
     if (data->num_uv_points[1] || data->chroma_scaling_from_luma)
         dsp->generate_grain_uv[in->p.layout - 1](grain_lut[2], grain_lut[0],
                                                  data, 1 HIGHBD_TAIL_SUFFIX);

     // Generate scaling LUTs as needed
     if (data->num_y_points)
         generate_scaling(in->p.bpc, data->y_points, data->num_y_points, scaling[0]);
     if (data->num_uv_points[0])
         generate_scaling(in->p.bpc, data->uv_points[0], data->num_uv_points[0], scaling[1]);
     if (data->num_uv_points[1])
         generate_scaling(in->p.bpc, data->uv_points[1], data->num_uv_points[1], scaling[2]);

     // Copy over the non-modified planes
     // TODO: eliminate in favor of per-plane refs
     assert(out->stride[0] == in->stride[0]);
     if (!data->num_y_points) {
         memcpy(out->data[0], in->data[0], out->p.h * out->stride[0]);
     }

     if (in->p.layout != DAV1D_PIXEL_LAYOUT_I400) {
         assert(out->stride[1] == in->stride[1]);
         for (int i = 0; i < 2; i++) {
             if (!data->num_uv_points[i] && !data->chroma_scaling_from_luma) {
                 const int suby = in->p.layout == DAV1D_PIXEL_LAYOUT_I420;
                 memcpy(out->data[1+i], in->data[1+i],
                        (out->p.h >> suby) * out->stride[1]);
             }
         }
     }

     // Synthesize grain for the affected planes
     const int rows = (out->p.h + 31) >> 5;
     const int ss_y = in->p.layout == DAV1D_PIXEL_LAYOUT_I420;
     const int ss_x = in->p.layout != DAV1D_PIXEL_LAYOUT_I444;
     const int cpw = (out->p.w + ss_x) >> ss_x;
     const int is_id = out->seq_hdr->mtrx == DAV1D_MC_IDENTITY;
     for (int row = 0; row < rows; row++) {
         pixel *const luma_src =
             ((pixel *) in->data[0]) + row * BLOCK_SIZE * PXSTRIDE(in->stride[0]);

         if (data->num_y_points) {
             const int bh = imin(out->p.h - row * BLOCK_SIZE, BLOCK_SIZE);
             dsp->fgy_32x32xn(((pixel *) out->data[0]) + row * BLOCK_SIZE * PXSTRIDE(out->stride[0]),
                              luma_src, out->stride[0], data,
                              out->p.w, scaling[0], grain_lut[0], bh, row HIGHBD_TAIL_SUFFIX);
         }

         if (!data->num_uv_points[0] && !data->num_uv_points[1] &&
             !data->chroma_scaling_from_luma)
         {
             continue;
         }

         const int bh = (imin(out->p.h - row * BLOCK_SIZE, BLOCK_SIZE) + ss_y) >> ss_y;

         // extend padding pixels
         if (out->p.w & ss_x) {
             pixel *ptr = luma_src;
             for (int y = 0; y < bh; y++) {
                 ptr[out->p.w] = ptr[out->p.w - 1];
                 ptr += PXSTRIDE(in->stride[0]) << ss_y;
             }
         }

         const ptrdiff_t uv_off = row * BLOCK_SIZE * PXSTRIDE(out->stride[1]) >> ss_y;
         if (data->chroma_scaling_from_luma) {
             for (int pl = 0; pl < 2; pl++)
                 dsp->fguv_32x32xn[in->p.layout - 1](((pixel *) out->data[1 + pl]) + uv_off,
                                                     ((const pixel *) in->data[1 + pl]) + uv_off,
                                                     in->stride[1], data, cpw,
                                                     scaling[0], grain_lut[1 + pl],
                                                     bh, row, luma_src, in->stride[0],
                                                     pl, is_id HIGHBD_TAIL_SUFFIX);
         } else {
             for (int pl = 0; pl < 2; pl++)
                 if (data->num_uv_points[pl])
                     dsp->fguv_32x32xn[in->p.layout - 1](((pixel *) out->data[1 + pl]) + uv_off,
                                                         ((const pixel *) in->data[1 + pl]) + uv_off,
                                                         in->stride[1], data, cpw,
                                                         scaling[1 + pl], grain_lut[1 + pl],
                                                         bh, row, luma_src, in->stride[0],
                                                         pl, is_id HIGHBD_TAIL_SUFFIX);
         }
     }
 }
 #endif
	/*
	* Copyright © 2018, Niklas Haas
	* Copyright © 2018, VideoLAN and dav1d authors
	* Copyright © 2018, Two Orioles, LLC
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are met:
	*
	* 1. Redistributions of source code must retain the above copyright notice, this
	* list of conditions and the following disclaimer.
	*
	* 2. Redistributions in binary form must reproduce the above copyright notice,
	* this list of conditions and the following disclaimer in the documentation
	* and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
	* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
	* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
	* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "config.h"

	#include <stdint.h>

	#include "dav1d/picture.h"

	#include "common.h"
	#include "common/intops.h"
	#include "common/bitdepth.h"

	#include "fg_apply.h"

	static void generate_scaling(const int bitdepth,
	const uint8_t points[][2], const int num,
	uint8_t scaling[SCALING_SIZE])
	{
	#if BITDEPTH == 8
	const int shift_x = 0;
	#else
	const int shift_x = bitdepth - 8;
	#endif
	const int scaling_size = 1 << bitdepth;

	// Fill up the preceding entries with the initial value
	for (int i = 0; i < points[0][0] << shift_x; i++)
	scaling[i] = points[0][1];

	// Linearly interpolate the values in the middle
	for (int i = 0; i < num - 1; i++) {
	const int bx = points[i][0];
	const int by = points[i][1];
	const int ex = points[i+1][0];
	const int ey = points[i+1][1];
	const int dx = ex - bx;
	const int dy = ey - by;
	const int delta = dy * ((0x10000 + (dx >> 1)) / dx);
	for (int x = 0; x < dx; x++) {
	const int v = by + ((x * delta + 0x8000) >> 16);
	scaling[(bx + x) << shift_x] = v;
	}
	}

	// Fill up the remaining entries with the final value
	for (int i = points[num - 1][0] << shift_x; i < scaling_size; i++)
	scaling[i] = points[num - 1][1];

	#if BITDEPTH != 8
	const int pad = 1 << shift_x, rnd = pad >> 1;
	for (int i = 0; i < num - 1; i++) {
	const int bx = points[i][0] << shift_x;
	const int ex = points[i+1][0] << shift_x;
	const int dx = ex - bx;
	for (int x = 0; x < dx; x += pad) {
	const int range = scaling[bx + x + pad] - scaling[bx + x];
	for (int n = 1; n < pad; n++) {
	scaling[bx + x + n] = scaling[bx + x] + ((range * n + rnd) >> shift_x);
	}
	}
	}
	#endif
	}

	#ifndef UNIT_TEST
	void bitfn(dav1d_apply_grain)(const Dav1dFilmGrainDSPContext *const dsp,
	Dav1dPicture *const out,
	Dav1dPicture *const in)
	{
	const Dav1dFilmGrainData *const data = &out->frame_hdr->film_grain.data;

	entry grain_lut[3][GRAIN_HEIGHT + 1][GRAIN_WIDTH];
	uint8_t scaling[3][SCALING_SIZE];
	#if BITDEPTH != 8
	const int bitdepth_max = (1 << out->p.bpc) - 1;
	#endif

	// Generate grain LUTs as needed
	dsp->generate_grain_y(grain_lut[0], data HIGHBD_TAIL_SUFFIX); // always needed
	if (data->num_uv_points[0] \|\| data->chroma_scaling_from_luma)
	dsp->generate_grain_uv[in->p.layout - 1](grain_lut[1], grain_lut[0],
	data, 0 HIGHBD_TAIL_SUFFIX);
	if (data->num_uv_points[1] \|\| data->chroma_scaling_from_luma)
	dsp->generate_grain_uv[in->p.layout - 1](grain_lut[2], grain_lut[0],
	data, 1 HIGHBD_TAIL_SUFFIX);

	// Generate scaling LUTs as needed
	if (data->num_y_points)
	generate_scaling(in->p.bpc, data->y_points, data->num_y_points, scaling[0]);
	if (data->num_uv_points[0])
	generate_scaling(in->p.bpc, data->uv_points[0], data->num_uv_points[0], scaling[1]);
	if (data->num_uv_points[1])
	generate_scaling(in->p.bpc, data->uv_points[1], data->num_uv_points[1], scaling[2]);

	// Copy over the non-modified planes
	// TODO: eliminate in favor of per-plane refs
	assert(out->stride[0] == in->stride[0]);
	if (!data->num_y_points) {
	memcpy(out->data[0], in->data[0], out->p.h * out->stride[0]);
	}

	if (in->p.layout != DAV1D_PIXEL_LAYOUT_I400) {
	assert(out->stride[1] == in->stride[1]);
	for (int i = 0; i < 2; i++) {
	if (!data->num_uv_points[i] && !data->chroma_scaling_from_luma) {
	const int suby = in->p.layout == DAV1D_PIXEL_LAYOUT_I420;
	memcpy(out->data[1+i], in->data[1+i],
	(out->p.h >> suby) * out->stride[1]);
	}
	}
	}

	// Synthesize grain for the affected planes
	const int rows = (out->p.h + 31) >> 5;
	const int ss_y = in->p.layout == DAV1D_PIXEL_LAYOUT_I420;
	const int ss_x = in->p.layout != DAV1D_PIXEL_LAYOUT_I444;
	const int cpw = (out->p.w + ss_x) >> ss_x;
	const int is_id = out->seq_hdr->mtrx == DAV1D_MC_IDENTITY;
	for (int row = 0; row < rows; row++) {
	pixel *const luma_src =
	((pixel ) in->data[0]) + row BLOCK_SIZE * PXSTRIDE(in->stride[0]);

	if (data->num_y_points) {
	const int bh = imin(out->p.h - row * BLOCK_SIZE, BLOCK_SIZE);
	dsp->fgy_32x32xn(((pixel ) out->data[0]) + row BLOCK_SIZE * PXSTRIDE(out->stride[0]),
	luma_src, out->stride[0], data,
	out->p.w, scaling[0], grain_lut[0], bh, row HIGHBD_TAIL_SUFFIX);
	}

	if (!data->num_uv_points[0] && !data->num_uv_points[1] &&
	!data->chroma_scaling_from_luma)
	{
	continue;
	}

	const int bh = (imin(out->p.h - row * BLOCK_SIZE, BLOCK_SIZE) + ss_y) >> ss_y;

	// extend padding pixels
	if (out->p.w & ss_x) {
	pixel *ptr = luma_src;
	for (int y = 0; y < bh; y++) {
	ptr[out->p.w] = ptr[out->p.w - 1];
	ptr += PXSTRIDE(in->stride[0]) << ss_y;
	}
	}

	const ptrdiff_t uv_off = row * BLOCK_SIZE * PXSTRIDE(out->stride[1]) >> ss_y;
	if (data->chroma_scaling_from_luma) {
	for (int pl = 0; pl < 2; pl++)
	dsp->fguv_32x32xn[in->p.layout - 1](((pixel *) out->data[1 + pl]) + uv_off,
	((const pixel *) in->data[1 + pl]) + uv_off,
	in->stride[1], data, cpw,
	scaling[0], grain_lut[1 + pl],
	bh, row, luma_src, in->stride[0],
	pl, is_id HIGHBD_TAIL_SUFFIX);
	} else {
	for (int pl = 0; pl < 2; pl++)
	if (data->num_uv_points[pl])
	dsp->fguv_32x32xn[in->p.layout - 1](((pixel *) out->data[1 + pl]) + uv_off,
	((const pixel *) in->data[1 + pl]) + uv_off,
	in->stride[1], data, cpw,
	scaling[1 + pl], grain_lut[1 + pl],
	bh, row, luma_src, in->stride[0],
	pl, is_id HIGHBD_TAIL_SUFFIX);
	}
	}
	}
	#endif