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

 /*
  * 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
  */

 #include "config.h"
 #include "libavutil/attributes.h"
 #include "libavutil/common.h"
 #include "avcodec.h"
 #include "dct.h"
 #include "faanidct.h"
 #include "idctdsp.h"
 #include "simple_idct.h"
 #include "xvididct.h"

 av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st,
                                const uint8_t *src_scantable)
 {
     int i, end;

     st->scantable = src_scantable;

     for (i = 0; i < 64; i++) {
         int j = src_scantable[i];
         st->permutated[i] = permutation[j];
     }

     end = -1;
     for (i = 0; i < 64; i++) {
         int j = st->permutated[i];
         if (j > end)
             end = j;
         st->raster_end[i] = end;
     }
 }

 av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation,
                                            enum idct_permutation_type perm_type)
 {
     int i;

     if (ARCH_X86)
         if (ff_init_scantable_permutation_x86(idct_permutation,
                                               perm_type))
             return;

     switch (perm_type) {
     case FF_IDCT_PERM_NONE:
         for (i = 0; i < 64; i++)
             idct_permutation[i] = i;
         break;
     case FF_IDCT_PERM_LIBMPEG2:
         for (i = 0; i < 64; i++)
             idct_permutation[i] = (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2);
         break;
     case FF_IDCT_PERM_TRANSPOSE:
         for (i = 0; i < 64; i++)
             idct_permutation[i] = ((i & 7) << 3) | (i >> 3);
         break;
     case FF_IDCT_PERM_PARTTRANS:
         for (i = 0; i < 64; i++)
             idct_permutation[i] = (i & 0x24) | ((i & 3) << 3) | ((i >> 3) & 3);
         break;
     default:
         av_log(NULL, AV_LOG_ERROR,
                "Internal error, IDCT permutation not set\n");
     }
 }

 void (*ff_put_pixels_clamped)(const int16_t *block, uint8_t *pixels, ptrdiff_t line_size);
 void (*ff_add_pixels_clamped)(const int16_t *block, uint8_t *pixels, ptrdiff_t line_size);

 static void put_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels,
                                  ptrdiff_t line_size)
 {
     int i;

     /* read the pixels */
     for (i = 0; i < 8; i++) {
         pixels[0] = av_clip_uint8(block[0]);
         pixels[1] = av_clip_uint8(block[1]);
         pixels[2] = av_clip_uint8(block[2]);
         pixels[3] = av_clip_uint8(block[3]);
         pixels[4] = av_clip_uint8(block[4]);
         pixels[5] = av_clip_uint8(block[5]);
         pixels[6] = av_clip_uint8(block[6]);
         pixels[7] = av_clip_uint8(block[7]);

         pixels += line_size;
         block  += 8;
     }
 }

 static void put_pixels_clamped4_c(const int16_t *block, uint8_t *av_restrict pixels,
                                  int line_size)
 {
     int i;

     /* read the pixels */
     for(i=0;i<4;i++) {
         pixels[0] = av_clip_uint8(block[0]);
         pixels[1] = av_clip_uint8(block[1]);
         pixels[2] = av_clip_uint8(block[2]);
         pixels[3] = av_clip_uint8(block[3]);

         pixels += line_size;
         block += 8;
     }
 }

 static void put_pixels_clamped2_c(const int16_t *block, uint8_t *av_restrict pixels,
                                  int line_size)
 {
     int i;

     /* read the pixels */
     for(i=0;i<2;i++) {
         pixels[0] = av_clip_uint8(block[0]);
         pixels[1] = av_clip_uint8(block[1]);

         pixels += line_size;
         block += 8;
     }
 }

 static void put_signed_pixels_clamped_c(const int16_t *block,
                                         uint8_t *av_restrict pixels,
                                         ptrdiff_t line_size)
 {
     int i, j;

     for (i = 0; i < 8; i++) {
         for (j = 0; j < 8; j++) {
             if (*block < -128)
                 *pixels = 0;
             else if (*block > 127)
                 *pixels = 255;
             else
                 *pixels = (uint8_t) (*block + 128);
             block++;
             pixels++;
         }
         pixels += (line_size - 8);
     }
 }

 static void add_pixels_clamped_c(const int16_t *block, uint8_t *av_restrict pixels,
                                  ptrdiff_t line_size)
 {
     int i;

     /* read the pixels */
     for (i = 0; i < 8; i++) {
         pixels[0] = av_clip_uint8(pixels[0] + block[0]);
         pixels[1] = av_clip_uint8(pixels[1] + block[1]);
         pixels[2] = av_clip_uint8(pixels[2] + block[2]);
         pixels[3] = av_clip_uint8(pixels[3] + block[3]);
         pixels[4] = av_clip_uint8(pixels[4] + block[4]);
         pixels[5] = av_clip_uint8(pixels[5] + block[5]);
         pixels[6] = av_clip_uint8(pixels[6] + block[6]);
         pixels[7] = av_clip_uint8(pixels[7] + block[7]);
         pixels   += line_size;
         block    += 8;
     }
 }

 static void add_pixels_clamped4_c(const int16_t *block, uint8_t *av_restrict pixels,
                           int line_size)
 {
     int i;

     /* read the pixels */
     for(i=0;i<4;i++) {
         pixels[0] = av_clip_uint8(pixels[0] + block[0]);
         pixels[1] = av_clip_uint8(pixels[1] + block[1]);
         pixels[2] = av_clip_uint8(pixels[2] + block[2]);
         pixels[3] = av_clip_uint8(pixels[3] + block[3]);
         pixels += line_size;
         block += 8;
     }
 }

 static void add_pixels_clamped2_c(const int16_t *block, uint8_t *av_restrict pixels,
                           int line_size)
 {
     int i;

     /* read the pixels */
     for(i=0;i<2;i++) {
         pixels[0] = av_clip_uint8(pixels[0] + block[0]);
         pixels[1] = av_clip_uint8(pixels[1] + block[1]);
         pixels += line_size;
         block += 8;
     }
 }

 static void ff_jref_idct4_put(uint8_t *dest, int line_size, int16_t *block)
 {
     ff_j_rev_dct4 (block);
     put_pixels_clamped4_c(block, dest, line_size);
 }
 static void ff_jref_idct4_add(uint8_t *dest, int line_size, int16_t *block)
 {
     ff_j_rev_dct4 (block);
     add_pixels_clamped4_c(block, dest, line_size);
 }

 static void ff_jref_idct2_put(uint8_t *dest, int line_size, int16_t *block)
 {
     ff_j_rev_dct2 (block);
     put_pixels_clamped2_c(block, dest, line_size);
 }
 static void ff_jref_idct2_add(uint8_t *dest, int line_size, int16_t *block)
 {
     ff_j_rev_dct2 (block);
     add_pixels_clamped2_c(block, dest, line_size);
 }

 static void ff_jref_idct1_put(uint8_t *dest, int line_size, int16_t *block)
 {
     dest[0] = av_clip_uint8((block[0] + 4)>>3);
 }
 static void ff_jref_idct1_add(uint8_t *dest, int line_size, int16_t *block)
 {
     dest[0] = av_clip_uint8(dest[0] + ((block[0] + 4)>>3));
 }

 av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
 {
     const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;

     if (avctx->lowres==1) {
         c->idct_put  = ff_jref_idct4_put;
         c->idct_add  = ff_jref_idct4_add;
         c->idct      = ff_j_rev_dct4;
         c->perm_type = FF_IDCT_PERM_NONE;
     } else if (avctx->lowres==2) {
         c->idct_put  = ff_jref_idct2_put;
         c->idct_add  = ff_jref_idct2_add;
         c->idct      = ff_j_rev_dct2;
         c->perm_type = FF_IDCT_PERM_NONE;
     } else if (avctx->lowres==3) {
         c->idct_put  = ff_jref_idct1_put;
         c->idct_add  = ff_jref_idct1_add;
         c->idct      = ff_j_rev_dct1;
         c->perm_type = FF_IDCT_PERM_NONE;
     } else {
         if (avctx->bits_per_raw_sample == 10 || avctx->bits_per_raw_sample == 9) {
             c->idct_put              = ff_simple_idct_put_10;
             c->idct_add              = ff_simple_idct_add_10;
             c->idct                  = ff_simple_idct_10;
             c->perm_type             = FF_IDCT_PERM_NONE;
         } else if (avctx->bits_per_raw_sample == 12) {
             c->idct_put              = ff_simple_idct_put_12;
             c->idct_add              = ff_simple_idct_add_12;
             c->idct                  = ff_simple_idct_12;
             c->perm_type             = FF_IDCT_PERM_NONE;
         } else {
             if (avctx->idct_algo == FF_IDCT_INT) {
                 c->idct_put  = ff_jref_idct_put;
                 c->idct_add  = ff_jref_idct_add;
                 c->idct      = ff_j_rev_dct;
                 c->perm_type = FF_IDCT_PERM_LIBMPEG2;
 #if CONFIG_FAANIDCT
             } else if (avctx->idct_algo == FF_IDCT_FAAN) {
                 c->idct_put  = ff_faanidct_put;
                 c->idct_add  = ff_faanidct_add;
                 c->idct      = ff_faanidct;
                 c->perm_type = FF_IDCT_PERM_NONE;
 #endif /* CONFIG_FAANIDCT */
             } else { // accurate/default
                 c->idct_put  = ff_simple_idct_put_8;
                 c->idct_add  = ff_simple_idct_add_8;
                 c->idct      = ff_simple_idct_8;
                 c->perm_type = FF_IDCT_PERM_NONE;
             }
         }
     }

     c->put_pixels_clamped        = put_pixels_clamped_c;
     c->put_signed_pixels_clamped = put_signed_pixels_clamped_c;
     c->add_pixels_clamped        = add_pixels_clamped_c;

     if (CONFIG_MPEG4_DECODER && avctx->idct_algo == FF_IDCT_XVID)
         ff_xvid_idct_init(c, avctx);

     if (ARCH_ALPHA)
         ff_idctdsp_init_alpha(c, avctx, high_bit_depth);
     if (ARCH_ARM)
         ff_idctdsp_init_arm(c, avctx, high_bit_depth);
     if (ARCH_PPC)
         ff_idctdsp_init_ppc(c, avctx, high_bit_depth);
     if (ARCH_X86)
         ff_idctdsp_init_x86(c, avctx, high_bit_depth);
     if (ARCH_MIPS)
         ff_idctdsp_init_mips(c, avctx, high_bit_depth);

     ff_put_pixels_clamped = c->put_pixels_clamped;
     ff_add_pixels_clamped = c->add_pixels_clamped;

     ff_init_scantable_permutation(c->idct_permutation,
                                   c->perm_type);
 }
	/*
	* 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
	*/

	#include "config.h"
	#include "libavutil/attributes.h"
	#include "libavutil/common.h"
	#include "avcodec.h"
	#include "dct.h"
	#include "faanidct.h"
	#include "idctdsp.h"
	#include "simple_idct.h"
	#include "xvididct.h"

	av_cold void ff_init_scantable(uint8_t permutation, ScanTable st,
	const uint8_t *src_scantable)
	{
	int i, end;

	st->scantable = src_scantable;

	for (i = 0; i < 64; i++) {
	int j = src_scantable[i];
	st->permutated[i] = permutation[j];
	}

	end = -1;
	for (i = 0; i < 64; i++) {
	int j = st->permutated[i];
	if (j > end)
	end = j;
	st->raster_end[i] = end;
	}
	}

	av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation,
	enum idct_permutation_type perm_type)
	{
	int i;

	if (ARCH_X86)
	if (ff_init_scantable_permutation_x86(idct_permutation,
	perm_type))
	return;

	switch (perm_type) {
	case FF_IDCT_PERM_NONE:
	for (i = 0; i < 64; i++)
	idct_permutation[i] = i;
	break;
	case FF_IDCT_PERM_LIBMPEG2:
	for (i = 0; i < 64; i++)
	idct_permutation[i] = (i & 0x38) \| ((i & 6) >> 1) \| ((i & 1) << 2);
	break;
	case FF_IDCT_PERM_TRANSPOSE:
	for (i = 0; i < 64; i++)
	idct_permutation[i] = ((i & 7) << 3) \| (i >> 3);
	break;
	case FF_IDCT_PERM_PARTTRANS:
	for (i = 0; i < 64; i++)
	idct_permutation[i] = (i & 0x24) \| ((i & 3) << 3) \| ((i >> 3) & 3);
	break;
	default:
	av_log(NULL, AV_LOG_ERROR,
	"Internal error, IDCT permutation not set\n");
	}
	}

	void (ff_put_pixels_clamped)(const int16_t block, uint8_t *pixels, ptrdiff_t line_size);
	void (ff_add_pixels_clamped)(const int16_t block, uint8_t *pixels, ptrdiff_t line_size);

	static void put_pixels_clamped_c(const int16_t block, uint8_t av_restrict pixels,
	ptrdiff_t line_size)
	{
	int i;

	/* read the pixels */
	for (i = 0; i < 8; i++) {
	pixels[0] = av_clip_uint8(block[0]);
	pixels[1] = av_clip_uint8(block[1]);
	pixels[2] = av_clip_uint8(block[2]);
	pixels[3] = av_clip_uint8(block[3]);
	pixels[4] = av_clip_uint8(block[4]);
	pixels[5] = av_clip_uint8(block[5]);
	pixels[6] = av_clip_uint8(block[6]);
	pixels[7] = av_clip_uint8(block[7]);

	pixels += line_size;
	block += 8;
	}
	}

	static void put_pixels_clamped4_c(const int16_t block, uint8_t av_restrict pixels,
	int line_size)
	{
	int i;

	/* read the pixels */
	for(i=0;i<4;i++) {
	pixels[0] = av_clip_uint8(block[0]);
	pixels[1] = av_clip_uint8(block[1]);
	pixels[2] = av_clip_uint8(block[2]);
	pixels[3] = av_clip_uint8(block[3]);

	pixels += line_size;
	block += 8;
	}
	}

	static void put_pixels_clamped2_c(const int16_t block, uint8_t av_restrict pixels,
	int line_size)
	{
	int i;

	/* read the pixels */
	for(i=0;i<2;i++) {
	pixels[0] = av_clip_uint8(block[0]);
	pixels[1] = av_clip_uint8(block[1]);

	pixels += line_size;
	block += 8;
	}
	}

	static void put_signed_pixels_clamped_c(const int16_t *block,
	uint8_t *av_restrict pixels,
	ptrdiff_t line_size)
	{
	int i, j;

	for (i = 0; i < 8; i++) {
	for (j = 0; j < 8; j++) {
	if (*block < -128)
	*pixels = 0;
	else if (*block > 127)
	*pixels = 255;
	else
	pixels = (uint8_t) (block + 128);
	block++;
	pixels++;
	}
	pixels += (line_size - 8);
	}
	}

	static void add_pixels_clamped_c(const int16_t block, uint8_t av_restrict pixels,
	ptrdiff_t line_size)
	{
	int i;

	/* read the pixels */
	for (i = 0; i < 8; i++) {
	pixels[0] = av_clip_uint8(pixels[0] + block[0]);
	pixels[1] = av_clip_uint8(pixels[1] + block[1]);
	pixels[2] = av_clip_uint8(pixels[2] + block[2]);
	pixels[3] = av_clip_uint8(pixels[3] + block[3]);
	pixels[4] = av_clip_uint8(pixels[4] + block[4]);
	pixels[5] = av_clip_uint8(pixels[5] + block[5]);
	pixels[6] = av_clip_uint8(pixels[6] + block[6]);
	pixels[7] = av_clip_uint8(pixels[7] + block[7]);
	pixels += line_size;
	block += 8;
	}
	}

	static void add_pixels_clamped4_c(const int16_t block, uint8_t av_restrict pixels,
	int line_size)
	{
	int i;

	/* read the pixels */
	for(i=0;i<4;i++) {
	pixels[0] = av_clip_uint8(pixels[0] + block[0]);
	pixels[1] = av_clip_uint8(pixels[1] + block[1]);
	pixels[2] = av_clip_uint8(pixels[2] + block[2]);
	pixels[3] = av_clip_uint8(pixels[3] + block[3]);
	pixels += line_size;
	block += 8;
	}
	}

	static void add_pixels_clamped2_c(const int16_t block, uint8_t av_restrict pixels,
	int line_size)
	{
	int i;

	/* read the pixels */
	for(i=0;i<2;i++) {
	pixels[0] = av_clip_uint8(pixels[0] + block[0]);
	pixels[1] = av_clip_uint8(pixels[1] + block[1]);
	pixels += line_size;
	block += 8;
	}
	}

	static void ff_jref_idct4_put(uint8_t dest, int line_size, int16_t block)
	{
	ff_j_rev_dct4 (block);
	put_pixels_clamped4_c(block, dest, line_size);
	}
	static void ff_jref_idct4_add(uint8_t dest, int line_size, int16_t block)
	{
	ff_j_rev_dct4 (block);
	add_pixels_clamped4_c(block, dest, line_size);
	}

	static void ff_jref_idct2_put(uint8_t dest, int line_size, int16_t block)
	{
	ff_j_rev_dct2 (block);
	put_pixels_clamped2_c(block, dest, line_size);
	}
	static void ff_jref_idct2_add(uint8_t dest, int line_size, int16_t block)
	{
	ff_j_rev_dct2 (block);
	add_pixels_clamped2_c(block, dest, line_size);
	}

	static void ff_jref_idct1_put(uint8_t dest, int line_size, int16_t block)
	{
	dest[0] = av_clip_uint8((block[0] + 4)>>3);
	}
	static void ff_jref_idct1_add(uint8_t dest, int line_size, int16_t block)
	{
	dest[0] = av_clip_uint8(dest[0] + ((block[0] + 4)>>3));
	}

	av_cold void ff_idctdsp_init(IDCTDSPContext c, AVCodecContext avctx)
	{
	const unsigned high_bit_depth = avctx->bits_per_raw_sample > 8;

	if (avctx->lowres==1) {
	c->idct_put = ff_jref_idct4_put;
	c->idct_add = ff_jref_idct4_add;
	c->idct = ff_j_rev_dct4;
	c->perm_type = FF_IDCT_PERM_NONE;
	} else if (avctx->lowres==2) {
	c->idct_put = ff_jref_idct2_put;
	c->idct_add = ff_jref_idct2_add;
	c->idct = ff_j_rev_dct2;
	c->perm_type = FF_IDCT_PERM_NONE;
	} else if (avctx->lowres==3) {
	c->idct_put = ff_jref_idct1_put;
	c->idct_add = ff_jref_idct1_add;
	c->idct = ff_j_rev_dct1;
	c->perm_type = FF_IDCT_PERM_NONE;
	} else {
	if (avctx->bits_per_raw_sample == 10 \|\| avctx->bits_per_raw_sample == 9) {
	c->idct_put = ff_simple_idct_put_10;
	c->idct_add = ff_simple_idct_add_10;
	c->idct = ff_simple_idct_10;
	c->perm_type = FF_IDCT_PERM_NONE;
	} else if (avctx->bits_per_raw_sample == 12) {
	c->idct_put = ff_simple_idct_put_12;
	c->idct_add = ff_simple_idct_add_12;
	c->idct = ff_simple_idct_12;
	c->perm_type = FF_IDCT_PERM_NONE;
	} else {
	if (avctx->idct_algo == FF_IDCT_INT) {
	c->idct_put = ff_jref_idct_put;
	c->idct_add = ff_jref_idct_add;
	c->idct = ff_j_rev_dct;
	c->perm_type = FF_IDCT_PERM_LIBMPEG2;
	#if CONFIG_FAANIDCT
	} else if (avctx->idct_algo == FF_IDCT_FAAN) {
	c->idct_put = ff_faanidct_put;
	c->idct_add = ff_faanidct_add;
	c->idct = ff_faanidct;
	c->perm_type = FF_IDCT_PERM_NONE;
	#endif /* CONFIG_FAANIDCT */
	} else { // accurate/default
	c->idct_put = ff_simple_idct_put_8;
	c->idct_add = ff_simple_idct_add_8;
	c->idct = ff_simple_idct_8;
	c->perm_type = FF_IDCT_PERM_NONE;
	}
	}
	}

	c->put_pixels_clamped = put_pixels_clamped_c;
	c->put_signed_pixels_clamped = put_signed_pixels_clamped_c;
	c->add_pixels_clamped = add_pixels_clamped_c;

	if (CONFIG_MPEG4_DECODER && avctx->idct_algo == FF_IDCT_XVID)
	ff_xvid_idct_init(c, avctx);

	if (ARCH_ALPHA)
	ff_idctdsp_init_alpha(c, avctx, high_bit_depth);
	if (ARCH_ARM)
	ff_idctdsp_init_arm(c, avctx, high_bit_depth);
	if (ARCH_PPC)
	ff_idctdsp_init_ppc(c, avctx, high_bit_depth);
	if (ARCH_X86)
	ff_idctdsp_init_x86(c, avctx, high_bit_depth);
	if (ARCH_MIPS)
	ff_idctdsp_init_mips(c, avctx, high_bit_depth);

	ff_put_pixels_clamped = c->put_pixels_clamped;
	ff_add_pixels_clamped = c->add_pixels_clamped;

	ff_init_scantable_permutation(c->idct_permutation,
	c->perm_type);
	}