diff options
Diffstat (limited to 'TAO/orbsvcs/tests/AVStreams/mpeg/source/mpeg_client/fs2.cpp')
| -rw-r--r-- | TAO/orbsvcs/tests/AVStreams/mpeg/source/mpeg_client/fs2.cpp | 394 |
1 files changed, 0 insertions, 394 deletions
diff --git a/TAO/orbsvcs/tests/AVStreams/mpeg/source/mpeg_client/fs2.cpp b/TAO/orbsvcs/tests/AVStreams/mpeg/source/mpeg_client/fs2.cpp deleted file mode 100644 index 583582ff3d2..00000000000 --- a/TAO/orbsvcs/tests/AVStreams/mpeg/source/mpeg_client/fs2.cpp +++ /dev/null @@ -1,394 +0,0 @@ -/* $Id$ */ -/* - * Copyright (c) 1992 The Regents of the University of California. - * All rights reserved. - * - * Permission to use, copy, modify, and distribute this software and its - * documentation for any purpose, without fee, and without written agreement is - * hereby granted, provided that the above copyright notice and the following - * two paragraphs appear in all copies of this software. - * - * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR - * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT - * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF - * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, - * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY - * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS - * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO - * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. - */ -#include <stdlib.h> -#include <string.h> -#include "video.h" -#include "dither.h" -#include "fs2.h" -#include "proto.h" - -/* Structures for precomputed error propogation values. */ - -static FS2DithVal lum_index[256]; -static FS2DithVal cr_index[256]; -static FS2DithVal cb_index[256]; - - - -/* - *-------------------------------------------------------------- - * - * InitFS2Dither -- - * - * Initializes structures for precomputed 2 error f-s dithering. - * The value field of the structure contains the pixel component - * of the particular channel in question. Thus the addition of - * the value field of a structure in the luminance index, a - * structure in the Cr index, and a structure in the Cb index will - * yeild a color number. This color number can then be transformed - * into a pixel value to be displayed. Each channel can then be - * processed (i.e. dithered) separately, with the results being - * added up and remapped to yield a final pixel value. - * - * Results: - * None. - * - * Side effects: - * None. - * - *-------------------------------------------------------------- - */ - -void InitFS2Dither() -{ - int i; - - /* For each possible pixel value, precompute propogated error and - store in array. - */ - - for (i=0; i<256; i++) { - lum_index[i].value = (i * LUM_RANGE) / 256; - - lum_index[i].e1 = (i-lum_values[lum_index[i].value]) / 2; - lum_index[i].e3 = (i - lum_values[lum_index[i].value]) - lum_index[i].e1; - - lum_index[i].value *= LUM_BASE; - - cr_index[i].value = (i * CR_RANGE) / 256; - - cr_index[i].e1 = (i - cr_values[cr_index[i].value]) / 2; - cr_index[i].e3 = (i - cr_values[cr_index[i].value]) - cr_index[i].e1 ; - - cr_index[i].value *= CR_BASE; - - cb_index[i].value = (i * CB_RANGE) / 256; - - cb_index[i].e1 = (i - cb_values[cb_index[i].value]) / 2; - cb_index[i].e3 = (i - cb_values[cb_index[i].value]) - cb_index[i].e1; - - cb_index[i].value *= CB_BASE; - - } - -} - - -/* - *-------------------------------------------------------------- - * - * DitherImage -- - * - * Converts lum, cr, cb image planes into fixed colormap - * space. - * - * Results: - * the display plane is replaced by 8-bit colormap space - * image. - * - * Side effects: - * Hopefully, none. - * - *-------------------------------------------------------------- - */ - -void FS2DitherImage(unsigned char *lum, unsigned char *cr, - unsigned char *cb, unsigned char *disp, - int rows, int cols) -{ - static char *cur_row_error, *next_row_error; - static int first = 1; - char *cur_row_err_mark, *next_row_err_mark; - char *temp; - int i, j, pixsum, c_cols; - unsigned char *cur_row, *channel, *dest_row; - FS2DithVal *chan_index; - - /* Allocate error arrays. */ - - if (first) { - cur_row_error = (char *) malloc(cols+2); - next_row_error = (char *) malloc(cols+2); - first = 0; - } - - /* Initialize error arrays. */ - - memset(cur_row_error, 0, cols+2); - memset(next_row_error, 0, cols+2); - - /* Use luminance values first. */ - - /* For each two rows, do... */ - - for(i=0; i<rows; i+=2) { - - /* Establish pointer to current source and destination rows. */ - cur_row = lum + (i*cols); - dest_row = disp + (i*cols); - - /* Establish pointers to error arrays. */ - cur_row_err_mark = cur_row_error + 1; - next_row_err_mark = next_row_error + 1; - - - /* For each column within first row do... */ - - for (j=0; j<cols; j++) { - - /* Calculate pixel value with error. */ - - pixsum = *cur_row + *cur_row_err_mark; - - /* Bounds check. */ - if (pixsum < 0) pixsum = 0; - else if (pixsum > 255) pixsum = 255; - - /* Establish dest value, propogate errors. */ - - *dest_row = lum_index[pixsum].value; - *(cur_row_err_mark+1) += lum_index[pixsum].e1; - *next_row_err_mark += lum_index[pixsum].e3; - - /* Advance pointers. */ - - cur_row++; - dest_row++; - cur_row_err_mark++; - next_row_err_mark++; - } - - /* Switch error arrays, so next row errors are now current row errors, and - vice versa. - */ - - temp = cur_row_error; - cur_row_error = next_row_error; - next_row_error = temp; - - /* Reset next row errors. */ - - memset(next_row_error, 0, cols+2); - - /* Establish pointers for second row. This one will be processed right to - left to establish serpantine motion. - */ - - cur_row += cols-1; - dest_row += cols-1; - cur_row_err_mark = cur_row_error + cols; - next_row_err_mark = next_row_error + cols; - - /* Process each column... */ - - for (j=0; j<cols; j++) { - - pixsum = *cur_row + *cur_row_err_mark; - if (pixsum < 0) pixsum = 0; - else if (pixsum > 255) pixsum = 255; - - *dest_row = lum_index[pixsum].value; - *(cur_row_err_mark-1) += lum_index[pixsum].e1; - *next_row_err_mark += lum_index[pixsum].e3; - - cur_row--; - dest_row--; - cur_row_err_mark--; - next_row_err_mark--; - } - - /* Switch error arrays. */ - - temp = cur_row_error; - cur_row_error = next_row_error; - next_row_error = temp; - - /* Reset next row errors. */ - - memset(next_row_error, 0, cols+2); - } - - /* Reset error arrays. */ - - memset(cur_row_error, 0, cols+2); - - /* Establish column length divided by two. */ - - c_cols = cols >> 1; - - /* Set channel to Cr. Use Cr index. */ - - channel = cr; - chan_index = cr_index; - - repeat: - - /* Process each row of chrominance data... */ - - for (i=0; i < rows; i+=2) { - - /* Establish pointers. */ - - cur_row = channel + ((i>>1)*c_cols); - dest_row = disp + (i*cols); - - cur_row_err_mark = cur_row_error+1; - next_row_err_mark = next_row_error+1; - - /* For each column in row... */ - - for (j=0; j<cols; j++) { - int p_val; - - /* Get pixel value as twos bit complement. */ - - p_val = *cur_row; - - /* Add error term. */ - - pixsum = *cur_row_err_mark + p_val; - - /* Bounds check. */ - - if (pixsum < 0) pixsum = 0; - else if (pixsum > 255) pixsum = 255; - - /* Increment dest value. */ - - *dest_row += chan_index[pixsum].value; - - /* Propogate error values. */ - - *(cur_row_err_mark+1) += chan_index[pixsum].e1; - *next_row_err_mark += chan_index[pixsum].e3; - - - /* If count is odd, advance source pointer (Cr and Cb channels are 2:1 - subsampled. - */ - - if (j&1) cur_row++; - - /* Advance destination and error pointers. */ - - dest_row++; - cur_row_err_mark++; - next_row_err_mark++; - } - - /* Switch error arrays. */ - - temp = cur_row_error; - cur_row_error = next_row_error; - next_row_error = temp; - - /* Reset next row errors. */ - - memset(next_row_error, 0, cols+2); - - /* Re-establish pointers. */ - - cur_row += c_cols-1; - dest_row += cols-1; - cur_row_err_mark = cur_row_error+cols; - next_row_err_mark = next_row_error+cols; - - /* Process second row right to left. */ - - for (j=0; j<cols; j++) { - int p_val; - - /* Get source value as twos bit complement. */ - - p_val = *cur_row; - - /* Add error. */ - - pixsum = *cur_row_err_mark + p_val; - - /* Bounds check. */ - - if (pixsum < 0) pixsum = 0; - else if (pixsum > 255) pixsum = 255; - - /* Increment dest value. */ - - *dest_row += chan_index[pixsum].value; - - /* Propogate errors. */ - - *(cur_row_err_mark-1) += chan_index[pixsum].e1; - *next_row_err_mark += chan_index[pixsum].e3; - - /* If column counters is odd, decrement source pointer. */ - - if (j&1) cur_row--; - - /* Decrement dest and error pointers. */ - - dest_row--; - cur_row_err_mark--; - next_row_err_mark--; - } - - /* Switch error arrays. */ - - temp = cur_row_error; - cur_row_error = next_row_error; - next_row_error = temp; - - /* Reinitialize next row errors. */ - - memset(next_row_error, 0, cols+2); - } - - /* If Cr channel completed, set channel to Cb and Cb index and repeat. */ - - if (channel == cr) { - channel = cb; - chan_index = cb_index; - memset(cur_row_error, 0, cols+2); - - goto repeat; - } - - /* Establish pointer to start of display frame. */ - - dest_row = disp; - - /* Transform all display values to pixel values. */ - - for (i=0; i<rows; i++) { - for (j=0; j<cols; j++) { - *dest_row = pixel[*dest_row]; - dest_row++; - } - } -} - - - - - - - - |