libavcodec/vp3dsp.c - nest-android-app/ffmpeg - Git at Google

 /*
  * Copyright (c) 2004 The FFmpeg Project
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */

 /**
  * @file
  * Standard C DSP-oriented functions cribbed from the original VP3
  * source code.
  */

 #include "libavutil/attributes.h"
 #include "libavutil/common.h"
 #include "libavutil/intreadwrite.h"

 #include "avcodec.h"
 #include "rnd_avg.h"
 #include "vp3dsp.h"

 #define IdctAdjustBeforeShift 8
 #define xC1S7 64277
 #define xC2S6 60547
 #define xC3S5 54491
 #define xC4S4 46341
 #define xC5S3 36410
 #define xC6S2 25080
 #define xC7S1 12785

 #define M(a, b) (((a) * (b)) >> 16)

 static av_always_inline void idct(uint8_t *dst, int stride,
                                   int16_t *input, int type)
 {
     int16_t *ip = input;

     int A, B, C, D, Ad, Bd, Cd, Dd, E, F, G, H;
     int Ed, Gd, Add, Bdd, Fd, Hd;

     int i;

     /* Inverse DCT on the rows now */
     for (i = 0; i < 8; i++) {
         /* Check for non-zero values */
         if (ip[0 * 8] | ip[1 * 8] | ip[2 * 8] | ip[3 * 8] |
             ip[4 * 8] | ip[5 * 8] | ip[6 * 8] | ip[7 * 8]) {
             A = M(xC1S7, ip[1 * 8]) + M(xC7S1, ip[7 * 8]);
             B = M(xC7S1, ip[1 * 8]) - M(xC1S7, ip[7 * 8]);
             C = M(xC3S5, ip[3 * 8]) + M(xC5S3, ip[5 * 8]);
             D = M(xC3S5, ip[5 * 8]) - M(xC5S3, ip[3 * 8]);

             Ad = M(xC4S4, (A - C));
             Bd = M(xC4S4, (B - D));

             Cd = A + C;
             Dd = B + D;

             E = M(xC4S4, (ip[0 * 8] + ip[4 * 8]));
             F = M(xC4S4, (ip[0 * 8] - ip[4 * 8]));

             G = M(xC2S6, ip[2 * 8]) + M(xC6S2, ip[6 * 8]);
             H = M(xC6S2, ip[2 * 8]) - M(xC2S6, ip[6 * 8]);

             Ed = E - G;
             Gd = E + G;

             Add = F + Ad;
             Bdd = Bd - H;

             Fd = F - Ad;
             Hd = Bd + H;

             /*  Final sequence of operations over-write original inputs. */
             ip[0 * 8] = Gd + Cd;
             ip[7 * 8] = Gd - Cd;

             ip[1 * 8] = Add + Hd;
             ip[2 * 8] = Add - Hd;

             ip[3 * 8] = Ed + Dd;
             ip[4 * 8] = Ed - Dd;

             ip[5 * 8] = Fd + Bdd;
             ip[6 * 8] = Fd - Bdd;
         }

         ip += 1;            /* next row */
     }

     ip = input;

     for (i = 0; i < 8; i++) {
         /* Check for non-zero values (bitwise or faster than ||) */
         if (ip[1] | ip[2] | ip[3] |
             ip[4] | ip[5] | ip[6] | ip[7]) {
             A = M(xC1S7, ip[1]) + M(xC7S1, ip[7]);
             B = M(xC7S1, ip[1]) - M(xC1S7, ip[7]);
             C = M(xC3S5, ip[3]) + M(xC5S3, ip[5]);
             D = M(xC3S5, ip[5]) - M(xC5S3, ip[3]);

             Ad = M(xC4S4, (A - C));
             Bd = M(xC4S4, (B - D));

             Cd = A + C;
             Dd = B + D;

             E = M(xC4S4, (ip[0] + ip[4])) + 8;
             F = M(xC4S4, (ip[0] - ip[4])) + 8;

             if (type == 1) { // HACK
                 E += 16 * 128;
                 F += 16 * 128;
             }

             G = M(xC2S6, ip[2]) + M(xC6S2, ip[6]);
             H = M(xC6S2, ip[2]) - M(xC2S6, ip[6]);

             Ed = E - G;
             Gd = E + G;

             Add = F + Ad;
             Bdd = Bd - H;

             Fd = F - Ad;
             Hd = Bd + H;

             /* Final sequence of operations over-write original inputs. */
             if (type == 1) {
                 dst[0 * stride] = av_clip_uint8((Gd + Cd) >> 4);
                 dst[7 * stride] = av_clip_uint8((Gd - Cd) >> 4);

                 dst[1 * stride] = av_clip_uint8((Add + Hd) >> 4);
                 dst[2 * stride] = av_clip_uint8((Add - Hd) >> 4);

                 dst[3 * stride] = av_clip_uint8((Ed + Dd) >> 4);
                 dst[4 * stride] = av_clip_uint8((Ed - Dd) >> 4);

                 dst[5 * stride] = av_clip_uint8((Fd + Bdd) >> 4);
                 dst[6 * stride] = av_clip_uint8((Fd - Bdd) >> 4);
             } else {
                 dst[0 * stride] = av_clip_uint8(dst[0 * stride] + ((Gd + Cd) >> 4));
                 dst[7 * stride] = av_clip_uint8(dst[7 * stride] + ((Gd - Cd) >> 4));

                 dst[1 * stride] = av_clip_uint8(dst[1 * stride] + ((Add + Hd) >> 4));
                 dst[2 * stride] = av_clip_uint8(dst[2 * stride] + ((Add - Hd) >> 4));

                 dst[3 * stride] = av_clip_uint8(dst[3 * stride] + ((Ed + Dd) >> 4));
                 dst[4 * stride] = av_clip_uint8(dst[4 * stride] + ((Ed - Dd) >> 4));

                 dst[5 * stride] = av_clip_uint8(dst[5 * stride] + ((Fd + Bdd) >> 4));
                 dst[6 * stride] = av_clip_uint8(dst[6 * stride] + ((Fd - Bdd) >> 4));
             }
         } else {
             if (type == 1) {
                 dst[0*stride] =
                 dst[1*stride] =
                 dst[2*stride] =
                 dst[3*stride] =
                 dst[4*stride] =
                 dst[5*stride] =
                 dst[6*stride] =
                 dst[7*stride] = av_clip_uint8(128 + ((xC4S4 * ip[0] + (IdctAdjustBeforeShift << 16)) >> 20));
             } else {
                 if (ip[0]) {
                     int v = (xC4S4 * ip[0] + (IdctAdjustBeforeShift << 16)) >> 20;
                     dst[0 * stride] = av_clip_uint8(dst[0 * stride] + v);
                     dst[1 * stride] = av_clip_uint8(dst[1 * stride] + v);
                     dst[2 * stride] = av_clip_uint8(dst[2 * stride] + v);
                     dst[3 * stride] = av_clip_uint8(dst[3 * stride] + v);
                     dst[4 * stride] = av_clip_uint8(dst[4 * stride] + v);
                     dst[5 * stride] = av_clip_uint8(dst[5 * stride] + v);
                     dst[6 * stride] = av_clip_uint8(dst[6 * stride] + v);
                     dst[7 * stride] = av_clip_uint8(dst[7 * stride] + v);
                 }
             }
         }

         ip += 8;            /* next column */
         dst++;
     }
 }

 static void vp3_idct_put_c(uint8_t *dest /* align 8 */, int line_size,
                            int16_t *block /* align 16 */)
 {
     idct(dest, line_size, block, 1);
     memset(block, 0, sizeof(*block) * 64);
 }

 static void vp3_idct_add_c(uint8_t *dest /* align 8 */, int line_size,
                            int16_t *block /* align 16 */)
 {
     idct(dest, line_size, block, 2);
     memset(block, 0, sizeof(*block) * 64);
 }

 static void vp3_idct_dc_add_c(uint8_t *dest /* align 8 */, int line_size,
                               int16_t *block /* align 16 */)
 {
     int i, dc = (block[0] + 15) >> 5;

     for (i = 0; i < 8; i++) {
         dest[0] = av_clip_uint8(dest[0] + dc);
         dest[1] = av_clip_uint8(dest[1] + dc);
         dest[2] = av_clip_uint8(dest[2] + dc);
         dest[3] = av_clip_uint8(dest[3] + dc);
         dest[4] = av_clip_uint8(dest[4] + dc);
         dest[5] = av_clip_uint8(dest[5] + dc);
         dest[6] = av_clip_uint8(dest[6] + dc);
         dest[7] = av_clip_uint8(dest[7] + dc);
         dest   += line_size;
     }
     block[0] = 0;
 }

 static void vp3_v_loop_filter_c(uint8_t *first_pixel, int stride,
                                 int *bounding_values)
 {
     unsigned char *end;
     int filter_value;
     const int nstride = -stride;

     for (end = first_pixel + 8; first_pixel < end; first_pixel++) {
         filter_value = (first_pixel[2 * nstride] - first_pixel[stride]) +
                        (first_pixel[0] - first_pixel[nstride]) * 3;
         filter_value = bounding_values[(filter_value + 4) >> 3];

         first_pixel[nstride] = av_clip_uint8(first_pixel[nstride] + filter_value);
         first_pixel[0]       = av_clip_uint8(first_pixel[0] - filter_value);
     }
 }

 static void vp3_h_loop_filter_c(uint8_t *first_pixel, int stride,
                                 int *bounding_values)
 {
     unsigned char *end;
     int filter_value;

     for (end = first_pixel + 8 * stride; first_pixel != end; first_pixel += stride) {
         filter_value = (first_pixel[-2] - first_pixel[1]) +
                        (first_pixel[ 0] - first_pixel[-1]) * 3;
         filter_value = bounding_values[(filter_value + 4) >> 3];

         first_pixel[-1] = av_clip_uint8(first_pixel[-1] + filter_value);
         first_pixel[ 0] = av_clip_uint8(first_pixel[ 0] - filter_value);
     }
 }

 static void put_no_rnd_pixels_l2(uint8_t *dst, const uint8_t *src1,
                                  const uint8_t *src2, ptrdiff_t stride, int h)
 {
     int i;

     for (i = 0; i < h; i++) {
         uint32_t a, b;

         a = AV_RN32(&src1[i * stride]);
         b = AV_RN32(&src2[i * stride]);
         AV_WN32A(&dst[i * stride], no_rnd_avg32(a, b));
         a = AV_RN32(&src1[i * stride + 4]);
         b = AV_RN32(&src2[i * stride + 4]);
         AV_WN32A(&dst[i * stride + 4], no_rnd_avg32(a, b));
     }
 }

 av_cold void ff_vp3dsp_init(VP3DSPContext *c, int flags)
 {
     c->put_no_rnd_pixels_l2 = put_no_rnd_pixels_l2;

     c->idct_put      = vp3_idct_put_c;
     c->idct_add      = vp3_idct_add_c;
     c->idct_dc_add   = vp3_idct_dc_add_c;
     c->v_loop_filter = vp3_v_loop_filter_c;
     c->h_loop_filter = vp3_h_loop_filter_c;

     if (ARCH_ARM)
         ff_vp3dsp_init_arm(c, flags);
     if (ARCH_PPC)
         ff_vp3dsp_init_ppc(c, flags);
     if (ARCH_X86)
         ff_vp3dsp_init_x86(c, flags);
 }
	/*
	* Copyright (c) 2004 The FFmpeg Project
	*
	* This file is part of FFmpeg.
	*
	* FFmpeg is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 of the License, or (at your option) any later version.
	*
	* FFmpeg is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with FFmpeg; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	*/

	/**
	* @file
	* Standard C DSP-oriented functions cribbed from the original VP3
	* source code.
	*/

	#include "libavutil/attributes.h"
	#include "libavutil/common.h"
	#include "libavutil/intreadwrite.h"

	#include "avcodec.h"
	#include "rnd_avg.h"
	#include "vp3dsp.h"

	#define IdctAdjustBeforeShift 8
	#define xC1S7 64277
	#define xC2S6 60547
	#define xC3S5 54491
	#define xC4S4 46341
	#define xC5S3 36410
	#define xC6S2 25080
	#define xC7S1 12785

	#define M(a, b) (((a) * (b)) >> 16)

	static av_always_inline void idct(uint8_t *dst, int stride,
	int16_t *input, int type)
	{
	int16_t *ip = input;

	int A, B, C, D, Ad, Bd, Cd, Dd, E, F, G, H;
	int Ed, Gd, Add, Bdd, Fd, Hd;

	int i;

	/* Inverse DCT on the rows now */
	for (i = 0; i < 8; i++) {
	/* Check for non-zero values */
	if (ip[0 * 8] \| ip[1 * 8] \| ip[2 * 8] \| ip[3 * 8] \|
	ip[4 * 8] \| ip[5 * 8] \| ip[6 * 8] \| ip[7 * 8]) {
	A = M(xC1S7, ip[1 * 8]) + M(xC7S1, ip[7 * 8]);
	B = M(xC7S1, ip[1 * 8]) - M(xC1S7, ip[7 * 8]);
	C = M(xC3S5, ip[3 * 8]) + M(xC5S3, ip[5 * 8]);
	D = M(xC3S5, ip[5 * 8]) - M(xC5S3, ip[3 * 8]);

	Ad = M(xC4S4, (A - C));
	Bd = M(xC4S4, (B - D));

	Cd = A + C;
	Dd = B + D;

	E = M(xC4S4, (ip[0 * 8] + ip[4 * 8]));
	F = M(xC4S4, (ip[0 * 8] - ip[4 * 8]));

	G = M(xC2S6, ip[2 * 8]) + M(xC6S2, ip[6 * 8]);
	H = M(xC6S2, ip[2 * 8]) - M(xC2S6, ip[6 * 8]);

	Ed = E - G;
	Gd = E + G;

	Add = F + Ad;
	Bdd = Bd - H;

	Fd = F - Ad;
	Hd = Bd + H;

	/* Final sequence of operations over-write original inputs. */
	ip[0 * 8] = Gd + Cd;
	ip[7 * 8] = Gd - Cd;

	ip[1 * 8] = Add + Hd;
	ip[2 * 8] = Add - Hd;

	ip[3 * 8] = Ed + Dd;
	ip[4 * 8] = Ed - Dd;

	ip[5 * 8] = Fd + Bdd;
	ip[6 * 8] = Fd - Bdd;
	}

	ip += 1; /* next row */
	}

	ip = input;

	for (i = 0; i < 8; i++) {
	/* Check for non-zero values (bitwise or faster than \|\|) */
	if (ip[1] \| ip[2] \| ip[3] \|
	ip[4] \| ip[5] \| ip[6] \| ip[7]) {
	A = M(xC1S7, ip[1]) + M(xC7S1, ip[7]);
	B = M(xC7S1, ip[1]) - M(xC1S7, ip[7]);
	C = M(xC3S5, ip[3]) + M(xC5S3, ip[5]);
	D = M(xC3S5, ip[5]) - M(xC5S3, ip[3]);

	Ad = M(xC4S4, (A - C));
	Bd = M(xC4S4, (B - D));

	Cd = A + C;
	Dd = B + D;

	E = M(xC4S4, (ip[0] + ip[4])) + 8;
	F = M(xC4S4, (ip[0] - ip[4])) + 8;

	if (type == 1) { // HACK
	E += 16 * 128;
	F += 16 * 128;
	}

	G = M(xC2S6, ip[2]) + M(xC6S2, ip[6]);
	H = M(xC6S2, ip[2]) - M(xC2S6, ip[6]);

	Ed = E - G;
	Gd = E + G;

	Add = F + Ad;
	Bdd = Bd - H;

	Fd = F - Ad;
	Hd = Bd + H;

	/* Final sequence of operations over-write original inputs. */
	if (type == 1) {
	dst[0 * stride] = av_clip_uint8((Gd + Cd) >> 4);
	dst[7 * stride] = av_clip_uint8((Gd - Cd) >> 4);

	dst[1 * stride] = av_clip_uint8((Add + Hd) >> 4);
	dst[2 * stride] = av_clip_uint8((Add - Hd) >> 4);

	dst[3 * stride] = av_clip_uint8((Ed + Dd) >> 4);
	dst[4 * stride] = av_clip_uint8((Ed - Dd) >> 4);

	dst[5 * stride] = av_clip_uint8((Fd + Bdd) >> 4);
	dst[6 * stride] = av_clip_uint8((Fd - Bdd) >> 4);
	} else {
	dst[0 * stride] = av_clip_uint8(dst[0 * stride] + ((Gd + Cd) >> 4));
	dst[7 * stride] = av_clip_uint8(dst[7 * stride] + ((Gd - Cd) >> 4));

	dst[1 * stride] = av_clip_uint8(dst[1 * stride] + ((Add + Hd) >> 4));
	dst[2 * stride] = av_clip_uint8(dst[2 * stride] + ((Add - Hd) >> 4));

	dst[3 * stride] = av_clip_uint8(dst[3 * stride] + ((Ed + Dd) >> 4));
	dst[4 * stride] = av_clip_uint8(dst[4 * stride] + ((Ed - Dd) >> 4));

	dst[5 * stride] = av_clip_uint8(dst[5 * stride] + ((Fd + Bdd) >> 4));
	dst[6 * stride] = av_clip_uint8(dst[6 * stride] + ((Fd - Bdd) >> 4));
	}
	} else {
	if (type == 1) {
	dst[0*stride] =
	dst[1*stride] =
	dst[2*stride] =
	dst[3*stride] =
	dst[4*stride] =
	dst[5*stride] =
	dst[6*stride] =
	dst[7stride] = av_clip_uint8(128 + ((xC4S4 ip[0] + (IdctAdjustBeforeShift << 16)) >> 20));
	} else {
	if (ip[0]) {
	int v = (xC4S4 * ip[0] + (IdctAdjustBeforeShift << 16)) >> 20;
	dst[0 * stride] = av_clip_uint8(dst[0 * stride] + v);
	dst[1 * stride] = av_clip_uint8(dst[1 * stride] + v);
	dst[2 * stride] = av_clip_uint8(dst[2 * stride] + v);
	dst[3 * stride] = av_clip_uint8(dst[3 * stride] + v);
	dst[4 * stride] = av_clip_uint8(dst[4 * stride] + v);
	dst[5 * stride] = av_clip_uint8(dst[5 * stride] + v);
	dst[6 * stride] = av_clip_uint8(dst[6 * stride] + v);
	dst[7 * stride] = av_clip_uint8(dst[7 * stride] + v);
	}
	}
	}

	ip += 8; /* next column */
	dst++;
	}
	}

	static void vp3_idct_put_c(uint8_t dest / align 8 */, int line_size,
	int16_t block / align 16 */)
	{
	idct(dest, line_size, block, 1);
	memset(block, 0, sizeof(block) 64);
	}

	static void vp3_idct_add_c(uint8_t dest / align 8 */, int line_size,
	int16_t block / align 16 */)
	{
	idct(dest, line_size, block, 2);
	memset(block, 0, sizeof(block) 64);
	}

	static void vp3_idct_dc_add_c(uint8_t dest / align 8 */, int line_size,
	int16_t block / align 16 */)
	{
	int i, dc = (block[0] + 15) >> 5;

	for (i = 0; i < 8; i++) {
	dest[0] = av_clip_uint8(dest[0] + dc);
	dest[1] = av_clip_uint8(dest[1] + dc);
	dest[2] = av_clip_uint8(dest[2] + dc);
	dest[3] = av_clip_uint8(dest[3] + dc);
	dest[4] = av_clip_uint8(dest[4] + dc);
	dest[5] = av_clip_uint8(dest[5] + dc);
	dest[6] = av_clip_uint8(dest[6] + dc);
	dest[7] = av_clip_uint8(dest[7] + dc);
	dest += line_size;
	}
	block[0] = 0;
	}

	static void vp3_v_loop_filter_c(uint8_t *first_pixel, int stride,
	int *bounding_values)
	{
	unsigned char *end;
	int filter_value;
	const int nstride = -stride;

	for (end = first_pixel + 8; first_pixel < end; first_pixel++) {
	filter_value = (first_pixel[2 * nstride] - first_pixel[stride]) +
	(first_pixel[0] - first_pixel[nstride]) * 3;
	filter_value = bounding_values[(filter_value + 4) >> 3];

	first_pixel[nstride] = av_clip_uint8(first_pixel[nstride] + filter_value);
	first_pixel[0] = av_clip_uint8(first_pixel[0] - filter_value);
	}
	}

	static void vp3_h_loop_filter_c(uint8_t *first_pixel, int stride,
	int *bounding_values)
	{
	unsigned char *end;
	int filter_value;

	for (end = first_pixel + 8 * stride; first_pixel != end; first_pixel += stride) {
	filter_value = (first_pixel[-2] - first_pixel[1]) +
	(first_pixel[ 0] - first_pixel[-1]) * 3;
	filter_value = bounding_values[(filter_value + 4) >> 3];

	first_pixel[-1] = av_clip_uint8(first_pixel[-1] + filter_value);
	first_pixel[ 0] = av_clip_uint8(first_pixel[ 0] - filter_value);
	}
	}

	static void put_no_rnd_pixels_l2(uint8_t dst, const uint8_t src1,
	const uint8_t *src2, ptrdiff_t stride, int h)
	{
	int i;

	for (i = 0; i < h; i++) {
	uint32_t a, b;

	a = AV_RN32(&src1[i * stride]);
	b = AV_RN32(&src2[i * stride]);
	AV_WN32A(&dst[i * stride], no_rnd_avg32(a, b));
	a = AV_RN32(&src1[i * stride + 4]);
	b = AV_RN32(&src2[i * stride + 4]);
	AV_WN32A(&dst[i * stride + 4], no_rnd_avg32(a, b));
	}
	}

	av_cold void ff_vp3dsp_init(VP3DSPContext *c, int flags)
	{
	c->put_no_rnd_pixels_l2 = put_no_rnd_pixels_l2;

	c->idct_put = vp3_idct_put_c;
	c->idct_add = vp3_idct_add_c;
	c->idct_dc_add = vp3_idct_dc_add_c;
	c->v_loop_filter = vp3_v_loop_filter_c;
	c->h_loop_filter = vp3_h_loop_filter_c;

	if (ARCH_ARM)
	ff_vp3dsp_init_arm(c, flags);
	if (ARCH_PPC)
	ff_vp3dsp_init_ppc(c, flags);
	if (ARCH_X86)
	ff_vp3dsp_init_x86(c, flags);
	}