src/third_party/libvpx/vp8/common/postproc.c - cobalt - Git at Google

 /*
  *  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_config.h"
 #include "vpx_dsp_rtcd.h"
 #include "vp8_rtcd.h"
 #include "vpx_dsp/postproc.h"
 #include "vpx_ports/system_state.h"
 #include "vpx_scale_rtcd.h"
 #include "vpx_scale/yv12config.h"
 #include "postproc.h"
 #include "common.h"
 #include "vpx_scale/vpx_scale.h"
 #include "systemdependent.h"

 #include <limits.h>
 #include <math.h>
 #include <stdlib.h>
 #include <stdio.h>

 /* clang-format off */
 #define RGB_TO_YUV(t)                                     \
   (unsigned char)((0.257 * (float)(t >> 16)) +            \
                   (0.504 * (float)(t >> 8 & 0xff)) +      \
                   (0.098 * (float)(t & 0xff)) + 16),      \
   (unsigned char)(-(0.148 * (float)(t >> 16)) -           \
                   (0.291 * (float)(t >> 8 & 0xff)) +      \
                   (0.439 * (float)(t & 0xff)) + 128),     \
   (unsigned char)((0.439 * (float)(t >> 16)) -            \
                   (0.368 * (float)(t >> 8 & 0xff)) -      \
                   (0.071 * (float)(t & 0xff)) + 128)
 /* clang-format on */

 extern void vp8_blit_text(const char *msg, unsigned char *address,
                           const int pitch);
 extern void vp8_blit_line(int x0, int x1, int y0, int y1, unsigned char *image,
                           const int pitch);
 /***********************************************************************************************************
  */
 #if CONFIG_POSTPROC
 static int q2mbl(int x) {
   if (x < 20) x = 20;

   x = 50 + (x - 50) * 10 / 8;
   return x * x / 3;
 }

 static void vp8_de_mblock(YV12_BUFFER_CONFIG *post, int q) {
   vpx_mbpost_proc_across_ip(post->y_buffer, post->y_stride, post->y_height,
                             post->y_width, q2mbl(q));
   vpx_mbpost_proc_down(post->y_buffer, post->y_stride, post->y_height,
                        post->y_width, q2mbl(q));
 }

 void vp8_deblock(VP8_COMMON *cm, YV12_BUFFER_CONFIG *source,
                  YV12_BUFFER_CONFIG *post, int q) {
   double level = 6.0e-05 * q * q * q - .0067 * q * q + .306 * q + .0065;
   int ppl = (int)(level + .5);

   const MODE_INFO *mode_info_context = cm->mi;
   int mbr, mbc;

   /* The pixel thresholds are adjusted according to if or not the macroblock
    * is a skipped block.  */
   unsigned char *ylimits = cm->pp_limits_buffer;
   unsigned char *uvlimits = cm->pp_limits_buffer + 16 * cm->mb_cols;

   if (ppl > 0) {
     for (mbr = 0; mbr < cm->mb_rows; ++mbr) {
       unsigned char *ylptr = ylimits;
       unsigned char *uvlptr = uvlimits;
       for (mbc = 0; mbc < cm->mb_cols; ++mbc) {
         unsigned char mb_ppl;

         if (mode_info_context->mbmi.mb_skip_coeff) {
           mb_ppl = (unsigned char)ppl >> 1;
         } else {
           mb_ppl = (unsigned char)ppl;
         }

         memset(ylptr, mb_ppl, 16);
         memset(uvlptr, mb_ppl, 8);

         ylptr += 16;
         uvlptr += 8;
         mode_info_context++;
       }
       mode_info_context++;

       vpx_post_proc_down_and_across_mb_row(
           source->y_buffer + 16 * mbr * source->y_stride,
           post->y_buffer + 16 * mbr * post->y_stride, source->y_stride,
           post->y_stride, source->y_width, ylimits, 16);

       vpx_post_proc_down_and_across_mb_row(
           source->u_buffer + 8 * mbr * source->uv_stride,
           post->u_buffer + 8 * mbr * post->uv_stride, source->uv_stride,
           post->uv_stride, source->uv_width, uvlimits, 8);
       vpx_post_proc_down_and_across_mb_row(
           source->v_buffer + 8 * mbr * source->uv_stride,
           post->v_buffer + 8 * mbr * post->uv_stride, source->uv_stride,
           post->uv_stride, source->uv_width, uvlimits, 8);
     }
   } else {
     vp8_yv12_copy_frame(source, post);
   }
 }

 void vp8_de_noise(VP8_COMMON *cm, YV12_BUFFER_CONFIG *source, int q,
                   int uvfilter) {
   int mbr;
   double level = 6.0e-05 * q * q * q - .0067 * q * q + .306 * q + .0065;
   int ppl = (int)(level + .5);
   int mb_rows = cm->mb_rows;
   int mb_cols = cm->mb_cols;
   unsigned char *limits = cm->pp_limits_buffer;

   memset(limits, (unsigned char)ppl, 16 * mb_cols);

   /* TODO: The original code don't filter the 2 outer rows and columns. */
   for (mbr = 0; mbr < mb_rows; ++mbr) {
     vpx_post_proc_down_and_across_mb_row(
         source->y_buffer + 16 * mbr * source->y_stride,
         source->y_buffer + 16 * mbr * source->y_stride, source->y_stride,
         source->y_stride, source->y_width, limits, 16);
     if (uvfilter == 1) {
       vpx_post_proc_down_and_across_mb_row(
           source->u_buffer + 8 * mbr * source->uv_stride,
           source->u_buffer + 8 * mbr * source->uv_stride, source->uv_stride,
           source->uv_stride, source->uv_width, limits, 8);
       vpx_post_proc_down_and_across_mb_row(
           source->v_buffer + 8 * mbr * source->uv_stride,
           source->v_buffer + 8 * mbr * source->uv_stride, source->uv_stride,
           source->uv_stride, source->uv_width, limits, 8);
     }
   }
 }
 #endif  // CONFIG_POSTPROC

 #if CONFIG_POSTPROC
 int vp8_post_proc_frame(VP8_COMMON *oci, YV12_BUFFER_CONFIG *dest,
                         vp8_ppflags_t *ppflags) {
   int q = oci->filter_level * 10 / 6;
   int flags = ppflags->post_proc_flag;
   int deblock_level = ppflags->deblocking_level;
   int noise_level = ppflags->noise_level;

   if (!oci->frame_to_show) return -1;

   if (q > 63) q = 63;

   if (!flags) {
     *dest = *oci->frame_to_show;

     /* handle problem with extending borders */
     dest->y_width = oci->Width;
     dest->y_height = oci->Height;
     dest->uv_height = dest->y_height / 2;
     oci->postproc_state.last_base_qindex = oci->base_qindex;
     oci->postproc_state.last_frame_valid = 1;
     return 0;
   }
   if (flags & VP8D_ADDNOISE) {
     if (!oci->postproc_state.generated_noise) {
       oci->postproc_state.generated_noise = vpx_calloc(
           oci->Width + 256, sizeof(*oci->postproc_state.generated_noise));
       if (!oci->postproc_state.generated_noise) return 1;
     }
   }

   /* Allocate post_proc_buffer_int if needed */
   if ((flags & VP8D_MFQE) && !oci->post_proc_buffer_int_used) {
     if ((flags & VP8D_DEBLOCK) || (flags & VP8D_DEMACROBLOCK)) {
       int width = (oci->Width + 15) & ~15;
       int height = (oci->Height + 15) & ~15;

       if (vp8_yv12_alloc_frame_buffer(&oci->post_proc_buffer_int, width, height,
                                       VP8BORDERINPIXELS)) {
         vpx_internal_error(&oci->error, VPX_CODEC_MEM_ERROR,
                            "Failed to allocate MFQE framebuffer");
       }

       oci->post_proc_buffer_int_used = 1;

       /* insure that postproc is set to all 0's so that post proc
        * doesn't pull random data in from edge
        */
       memset((&oci->post_proc_buffer_int)->buffer_alloc, 128,
              (&oci->post_proc_buffer)->frame_size);
     }
   }

   vpx_clear_system_state();

   if ((flags & VP8D_MFQE) && oci->postproc_state.last_frame_valid &&
       oci->current_video_frame > 10 &&
       oci->postproc_state.last_base_qindex < 60 &&
       oci->base_qindex - oci->postproc_state.last_base_qindex >= 20) {
     vp8_multiframe_quality_enhance(oci);
     if (((flags & VP8D_DEBLOCK) || (flags & VP8D_DEMACROBLOCK)) &&
         oci->post_proc_buffer_int_used) {
       vp8_yv12_copy_frame(&oci->post_proc_buffer, &oci->post_proc_buffer_int);
       if (flags & VP8D_DEMACROBLOCK) {
         vp8_deblock(oci, &oci->post_proc_buffer_int, &oci->post_proc_buffer,
                     q + (deblock_level - 5) * 10);
         vp8_de_mblock(&oci->post_proc_buffer, q + (deblock_level - 5) * 10);
       } else if (flags & VP8D_DEBLOCK) {
         vp8_deblock(oci, &oci->post_proc_buffer_int, &oci->post_proc_buffer, q);
       }
     }
     /* Move partially towards the base q of the previous frame */
     oci->postproc_state.last_base_qindex =
         (3 * oci->postproc_state.last_base_qindex + oci->base_qindex) >> 2;
   } else if (flags & VP8D_DEMACROBLOCK) {
     vp8_deblock(oci, oci->frame_to_show, &oci->post_proc_buffer,
                 q + (deblock_level - 5) * 10);
     vp8_de_mblock(&oci->post_proc_buffer, q + (deblock_level - 5) * 10);

     oci->postproc_state.last_base_qindex = oci->base_qindex;
   } else if (flags & VP8D_DEBLOCK) {
     vp8_deblock(oci, oci->frame_to_show, &oci->post_proc_buffer, q);
     oci->postproc_state.last_base_qindex = oci->base_qindex;
   } else {
     vp8_yv12_copy_frame(oci->frame_to_show, &oci->post_proc_buffer);
     oci->postproc_state.last_base_qindex = oci->base_qindex;
   }
   oci->postproc_state.last_frame_valid = 1;

   if (flags & VP8D_ADDNOISE) {
     if (oci->postproc_state.last_q != q ||
         oci->postproc_state.last_noise != noise_level) {
       double sigma;
       struct postproc_state *ppstate = &oci->postproc_state;
       vpx_clear_system_state();
       sigma = noise_level + .5 + .6 * q / 63.0;
       ppstate->clamp =
           vpx_setup_noise(sigma, ppstate->generated_noise, oci->Width + 256);
       ppstate->last_q = q;
       ppstate->last_noise = noise_level;
     }

     vpx_plane_add_noise(
         oci->post_proc_buffer.y_buffer, oci->postproc_state.generated_noise,
         oci->postproc_state.clamp, oci->postproc_state.clamp,
         oci->post_proc_buffer.y_width, oci->post_proc_buffer.y_height,
         oci->post_proc_buffer.y_stride);
   }

   *dest = oci->post_proc_buffer;

   /* handle problem with extending borders */
   dest->y_width = oci->Width;
   dest->y_height = oci->Height;
   dest->uv_height = dest->y_height / 2;
   return 0;
 }
 #endif
	/*
	* 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_config.h"
	#include "vpx_dsp_rtcd.h"
	#include "vp8_rtcd.h"
	#include "vpx_dsp/postproc.h"
	#include "vpx_ports/system_state.h"
	#include "vpx_scale_rtcd.h"
	#include "vpx_scale/yv12config.h"
	#include "postproc.h"
	#include "common.h"
	#include "vpx_scale/vpx_scale.h"
	#include "systemdependent.h"

	#include <limits.h>
	#include <math.h>
	#include <stdlib.h>
	#include <stdio.h>

	/* clang-format off */
	#define RGB_TO_YUV(t) \
	(unsigned char)((0.257 * (float)(t >> 16)) + \
	(0.504 * (float)(t >> 8 & 0xff)) + \
	(0.098 * (float)(t & 0xff)) + 16), \
	(unsigned char)(-(0.148 * (float)(t >> 16)) - \
	(0.291 * (float)(t >> 8 & 0xff)) + \
	(0.439 * (float)(t & 0xff)) + 128), \
	(unsigned char)((0.439 * (float)(t >> 16)) - \
	(0.368 * (float)(t >> 8 & 0xff)) - \
	(0.071 * (float)(t & 0xff)) + 128)
	/* clang-format on */

	extern void vp8_blit_text(const char msg, unsigned char address,
	const int pitch);
	extern void vp8_blit_line(int x0, int x1, int y0, int y1, unsigned char *image,
	const int pitch);
	/***********************************************************************************************************
	*/
	#if CONFIG_POSTPROC
	static int q2mbl(int x) {
	if (x < 20) x = 20;

	x = 50 + (x - 50) * 10 / 8;
	return x * x / 3;
	}

	static void vp8_de_mblock(YV12_BUFFER_CONFIG *post, int q) {
	vpx_mbpost_proc_across_ip(post->y_buffer, post->y_stride, post->y_height,
	post->y_width, q2mbl(q));
	vpx_mbpost_proc_down(post->y_buffer, post->y_stride, post->y_height,
	post->y_width, q2mbl(q));
	}

	void vp8_deblock(VP8_COMMON cm, YV12_BUFFER_CONFIG source,
	YV12_BUFFER_CONFIG *post, int q) {
	double level = 6.0e-05 * q * q * q - .0067 * q * q + .306 * q + .0065;
	int ppl = (int)(level + .5);

	const MODE_INFO *mode_info_context = cm->mi;
	int mbr, mbc;

	/* The pixel thresholds are adjusted according to if or not the macroblock
	* is a skipped block. */
	unsigned char *ylimits = cm->pp_limits_buffer;
	unsigned char uvlimits = cm->pp_limits_buffer + 16 cm->mb_cols;

	if (ppl > 0) {
	for (mbr = 0; mbr < cm->mb_rows; ++mbr) {
	unsigned char *ylptr = ylimits;
	unsigned char *uvlptr = uvlimits;
	for (mbc = 0; mbc < cm->mb_cols; ++mbc) {
	unsigned char mb_ppl;

	if (mode_info_context->mbmi.mb_skip_coeff) {
	mb_ppl = (unsigned char)ppl >> 1;
	} else {
	mb_ppl = (unsigned char)ppl;
	}

	memset(ylptr, mb_ppl, 16);
	memset(uvlptr, mb_ppl, 8);

	ylptr += 16;
	uvlptr += 8;
	mode_info_context++;
	}
	mode_info_context++;

	vpx_post_proc_down_and_across_mb_row(
	source->y_buffer + 16 * mbr * source->y_stride,
	post->y_buffer + 16 * mbr * post->y_stride, source->y_stride,
	post->y_stride, source->y_width, ylimits, 16);

	vpx_post_proc_down_and_across_mb_row(
	source->u_buffer + 8 * mbr * source->uv_stride,
	post->u_buffer + 8 * mbr * post->uv_stride, source->uv_stride,
	post->uv_stride, source->uv_width, uvlimits, 8);
	vpx_post_proc_down_and_across_mb_row(
	source->v_buffer + 8 * mbr * source->uv_stride,
	post->v_buffer + 8 * mbr * post->uv_stride, source->uv_stride,
	post->uv_stride, source->uv_width, uvlimits, 8);
	}
	} else {
	vp8_yv12_copy_frame(source, post);
	}
	}

	void vp8_de_noise(VP8_COMMON cm, YV12_BUFFER_CONFIG source, int q,
	int uvfilter) {
	int mbr;
	double level = 6.0e-05 * q * q * q - .0067 * q * q + .306 * q + .0065;
	int ppl = (int)(level + .5);
	int mb_rows = cm->mb_rows;
	int mb_cols = cm->mb_cols;
	unsigned char *limits = cm->pp_limits_buffer;

	memset(limits, (unsigned char)ppl, 16 * mb_cols);

	/* TODO: The original code don't filter the 2 outer rows and columns. */
	for (mbr = 0; mbr < mb_rows; ++mbr) {
	vpx_post_proc_down_and_across_mb_row(
	source->y_buffer + 16 * mbr * source->y_stride,
	source->y_buffer + 16 * mbr * source->y_stride, source->y_stride,
	source->y_stride, source->y_width, limits, 16);
	if (uvfilter == 1) {
	vpx_post_proc_down_and_across_mb_row(
	source->u_buffer + 8 * mbr * source->uv_stride,
	source->u_buffer + 8 * mbr * source->uv_stride, source->uv_stride,
	source->uv_stride, source->uv_width, limits, 8);
	vpx_post_proc_down_and_across_mb_row(
	source->v_buffer + 8 * mbr * source->uv_stride,
	source->v_buffer + 8 * mbr * source->uv_stride, source->uv_stride,
	source->uv_stride, source->uv_width, limits, 8);
	}
	}
	}
	#endif // CONFIG_POSTPROC

	#if CONFIG_POSTPROC
	int vp8_post_proc_frame(VP8_COMMON oci, YV12_BUFFER_CONFIG dest,
	vp8_ppflags_t *ppflags) {
	int q = oci->filter_level * 10 / 6;
	int flags = ppflags->post_proc_flag;
	int deblock_level = ppflags->deblocking_level;
	int noise_level = ppflags->noise_level;

	if (!oci->frame_to_show) return -1;

	if (q > 63) q = 63;

	if (!flags) {
	dest = oci->frame_to_show;

	/* handle problem with extending borders */
	dest->y_width = oci->Width;
	dest->y_height = oci->Height;
	dest->uv_height = dest->y_height / 2;
	oci->postproc_state.last_base_qindex = oci->base_qindex;
	oci->postproc_state.last_frame_valid = 1;
	return 0;
	}
	if (flags & VP8D_ADDNOISE) {
	if (!oci->postproc_state.generated_noise) {
	oci->postproc_state.generated_noise = vpx_calloc(
	oci->Width + 256, sizeof(*oci->postproc_state.generated_noise));
	if (!oci->postproc_state.generated_noise) return 1;
	}
	}

	/* Allocate post_proc_buffer_int if needed */
	if ((flags & VP8D_MFQE) && !oci->post_proc_buffer_int_used) {
	if ((flags & VP8D_DEBLOCK) \|\| (flags & VP8D_DEMACROBLOCK)) {
	int width = (oci->Width + 15) & ~15;
	int height = (oci->Height + 15) & ~15;

	if (vp8_yv12_alloc_frame_buffer(&oci->post_proc_buffer_int, width, height,
	VP8BORDERINPIXELS)) {
	vpx_internal_error(&oci->error, VPX_CODEC_MEM_ERROR,
	"Failed to allocate MFQE framebuffer");
	}

	oci->post_proc_buffer_int_used = 1;

	/* insure that postproc is set to all 0's so that post proc
	* doesn't pull random data in from edge
	*/
	memset((&oci->post_proc_buffer_int)->buffer_alloc, 128,
	(&oci->post_proc_buffer)->frame_size);
	}
	}

	vpx_clear_system_state();

	if ((flags & VP8D_MFQE) && oci->postproc_state.last_frame_valid &&
	oci->current_video_frame > 10 &&
	oci->postproc_state.last_base_qindex < 60 &&
	oci->base_qindex - oci->postproc_state.last_base_qindex >= 20) {
	vp8_multiframe_quality_enhance(oci);
	if (((flags & VP8D_DEBLOCK) \|\| (flags & VP8D_DEMACROBLOCK)) &&
	oci->post_proc_buffer_int_used) {
	vp8_yv12_copy_frame(&oci->post_proc_buffer, &oci->post_proc_buffer_int);
	if (flags & VP8D_DEMACROBLOCK) {
	vp8_deblock(oci, &oci->post_proc_buffer_int, &oci->post_proc_buffer,
	q + (deblock_level - 5) * 10);
	vp8_de_mblock(&oci->post_proc_buffer, q + (deblock_level - 5) * 10);
	} else if (flags & VP8D_DEBLOCK) {
	vp8_deblock(oci, &oci->post_proc_buffer_int, &oci->post_proc_buffer, q);
	}
	}
	/* Move partially towards the base q of the previous frame */
	oci->postproc_state.last_base_qindex =
	(3 * oci->postproc_state.last_base_qindex + oci->base_qindex) >> 2;
	} else if (flags & VP8D_DEMACROBLOCK) {
	vp8_deblock(oci, oci->frame_to_show, &oci->post_proc_buffer,
	q + (deblock_level - 5) * 10);
	vp8_de_mblock(&oci->post_proc_buffer, q + (deblock_level - 5) * 10);

	oci->postproc_state.last_base_qindex = oci->base_qindex;
	} else if (flags & VP8D_DEBLOCK) {
	vp8_deblock(oci, oci->frame_to_show, &oci->post_proc_buffer, q);
	oci->postproc_state.last_base_qindex = oci->base_qindex;
	} else {
	vp8_yv12_copy_frame(oci->frame_to_show, &oci->post_proc_buffer);
	oci->postproc_state.last_base_qindex = oci->base_qindex;
	}
	oci->postproc_state.last_frame_valid = 1;

	if (flags & VP8D_ADDNOISE) {
	if (oci->postproc_state.last_q != q \|\|
	oci->postproc_state.last_noise != noise_level) {
	double sigma;
	struct postproc_state *ppstate = &oci->postproc_state;
	vpx_clear_system_state();
	sigma = noise_level + .5 + .6 * q / 63.0;
	ppstate->clamp =
	vpx_setup_noise(sigma, ppstate->generated_noise, oci->Width + 256);
	ppstate->last_q = q;
	ppstate->last_noise = noise_level;
	}

	vpx_plane_add_noise(
	oci->post_proc_buffer.y_buffer, oci->postproc_state.generated_noise,
	oci->postproc_state.clamp, oci->postproc_state.clamp,
	oci->post_proc_buffer.y_width, oci->post_proc_buffer.y_height,
	oci->post_proc_buffer.y_stride);
	}

	*dest = oci->post_proc_buffer;

	/* handle problem with extending borders */
	dest->y_width = oci->Width;
	dest->y_height = oci->Height;
	dest->uv_height = dest->y_height / 2;
	return 0;
	}
	#endif