--- trunk/xvidcore/src/utils/mem_transfer.c 2002/06/12 20:38:41 195 +++ trunk/xvidcore/src/utils/mem_transfer.c 2002/06/15 22:15:57 212 @@ -1,60 +1,81 @@ -/************************************************************************** +/***************************************************************************** + * + * XVID MPEG-4 VIDEO CODEC + * - 8bit<->16bit transfer - + * + * This program is free software ; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation ; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program ; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + ****************************************************************************/ +/***************************************************************************** * - * XVID MPEG-4 VIDEO CODEC - * 8bit<->16bit transfer + * History * - * This program is an implementation of a part of one or more MPEG-4 - * Video tools as specified in ISO/IEC 14496-2 standard. Those intending - * to use this software module in hardware or software products are - * advised that its use may infringe existing patents or copyrights, and - * any such use would be at such party's own risk. The original - * developer of this software module and his/her company, and subsequent - * editors and their companies, will have no liability for use of this - * software or modifications or derivatives thereof. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - *************************************************************************/ - -/************************************************************************** - * - * History: - * - * 14.04.2002 added transfer_8to16sub2 - * 07.01.2002 merge functions from compensate; rename functions - * 22.12.2001 transfer_8to8add16 limit fix - * 07.11.2001 initial version; (c)2001 peter ross + * - 14.06.2002 Changed legal header with the new FSF address + * - 14.04.2002 added transfer_8to16sub2 + * - 07.01.2002 merge functions from compensate; rename functions + * - 22.12.2001 transfer_8to8add16 limit fix + * - 07.11.2001 initial version; (c)2001 peter ross + * + * $Id: mem_transfer.c,v 1.4 2002-06-15 22:15:57 edgomez Exp $ + * + ****************************************************************************/ + +#include "../global.h" +#include "mem_transfer.h" + +/* Function pointers - Initialized in the xvid.c module */ - *************************************************************************/ +TRANSFER_8TO16COPY_PTR transfer_8to16copy; +TRANSFER_16TO8COPY_PTR transfer_16to8copy; TRANSFER_8TO16SUB_PTR transfer_8to16sub; TRANSFER_8TO16SUB2_PTR transfer_8to16sub2; TRANSFER_16TO8ADD_PTR transfer_16to8add; -// function pointers +TRANSFER8X8_COPY_PTR transfer8x8_copy; + /***************************************************************************** * -TRANSFER_8TO16SUB_PTR transfer_8to16sub; + * All these functions are used to transfer data from a 8 bit data array * to a 16 bit data array. -TRANSFER_16TO8ADD_PTR transfer_16to8add; + * * This is typically used during motion compensation, that's why some * functions also do the addition/substraction of another buffer during the * so called transfer. * + ****************************************************************************/ + +/* + * SRC - the source buffer + * DST - the destination buffer + * + * Then the function does the 8->16 bit transfer and this serie of operations : + * + * SRC (8bit) = SRC + * DST (16bit) = SRC */ +void +transfer_8to16copy_c(int16_t * const dst, + const uint8_t * const src, + uint32_t stride) +{ + uint32_t i, j; + + for (j = 0; j < 8; j++) { + for (i = 0; i < 8; i++) { dst[j * 8 + i] = (int16_t) src[j * stride + i]; } } @@ -69,7 +90,15 @@ * SRC (16bit) = SRC * DST (8bit) = max(min(SRC, 255), 0) */ +void +transfer_16to8copy_c(uint8_t * const dst, + const int16_t * const src, + uint32_t stride) +{ + uint32_t i, j; + for (j = 0; j < 8; j++) { + for (i = 0; i < 8; i++) { int16_t pixel = src[j * 8 + i]; if (pixel < 0) { @@ -95,9 +124,16 @@ * R (8bit) = R * C (8bit) = R * DCT (16bit) = C - R - perform motion compensation (and 8bit->16bit dct transfer) - ... with write back -*/ + */ +void +transfer_8to16sub_c(int16_t * const dct, + uint8_t * const cur, + const uint8_t * ref, + const uint32_t stride) +{ + uint32_t i, j; + + for (j = 0; j < 8; j++) { for (i = 0; i < 8; i++) { uint8_t c = cur[j * stride + i]; uint8_t r = ref[j * stride + i]; @@ -119,9 +155,18 @@ * * R1 (8bit) = R1 * R2 (8bit) = R2 - performs bi motion compensation (and 8bit->16bit dct transfer) - .. but does not write back -*/ + * C (8bit) = C + * DCT (16bit)= C - min((R1 + R2)/2, 255) + */ +void +transfer_8to16sub2_c(int16_t * const dct, + uint8_t * const cur, + const uint8_t * ref1, + const uint8_t * ref2, + const uint32_t stride) +{ + uint32_t i, j; + for (j = 0; j < 8; j++) { for (i = 0; i < 8; i++) { uint8_t c = cur[j * stride + i]; @@ -146,6 +191,15 @@ * SRC (16bit) = SRC * DST (8bit) = max(min(DST+SRC, 255), 0) */ +void +transfer_16to8add_c(uint8_t * const dst, + const int16_t * const src, + uint32_t stride) +{ + uint32_t i, j; + + for (j = 0; j < 8; j++) { + for (i = 0; i < 8; i++) { int16_t pixel = (int16_t) dst[j * stride + i] + src[j * 8 + i]; if (pixel < 0) { @@ -167,9 +221,15 @@ * SRC (8bit) = SRC * DST (8bit) = SRC */ +void +transfer8x8_copy_c(uint8_t * const dst, + const uint8_t * const src, + const uint32_t stride) +{ + uint32_t i, j; - - + for (j = 0; j < 8; j++) { + for (i = 0; i < 8; i++) { dst[j * stride + i] = src[j * stride + i]; } }