diff options
Diffstat (limited to 'TAO/orbsvcs/tests/AVStreams/mpeg/source/mpeg_client/motionvector.cpp')
| -rw-r--r-- | TAO/orbsvcs/tests/AVStreams/mpeg/source/mpeg_client/motionvector.cpp | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/TAO/orbsvcs/tests/AVStreams/mpeg/source/mpeg_client/motionvector.cpp b/TAO/orbsvcs/tests/AVStreams/mpeg/source/mpeg_client/motionvector.cpp new file mode 100644 index 00000000000..3b95e694cdc --- /dev/null +++ b/TAO/orbsvcs/tests/AVStreams/mpeg/source/mpeg_client/motionvector.cpp @@ -0,0 +1,197 @@ +/* $Id$ */ + +/* + * 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 "ace/OS.h" +#include "video.h" +#include "proto.h" +#include "util.h" + +ACE_RCSID(mpeg_client, motionvector, "$Id$") + + +/* + *-------------------------------------------------------------- + * + * ComputeVector -- + * + * Computes motion vector given parameters previously parsed + * and reconstructed. + * + * Results: + * Reconstructed motion vector info is put into recon_* parameters + * passed to this function. Also updated previous motion vector + * information. + * + * Side effects: + * None. + * + *-------------------------------------------------------------- + */ + +#define ComputeVector(recon_right_ptr, recon_down_ptr, recon_right_prev, recon_down_prev, f, full_pel_vector, motion_h_code, motion_v_code, motion_h_r, motion_v_r) \ + \ +{ \ + int comp_h_r, comp_v_r; \ + int right_little, right_big, down_little, down_big; \ + int max, min, new_vector; \ + \ + /* The following procedure for the reconstruction of motion vectors \ + is a direct and simple implementation of the instructions given \ + in the mpeg December 1991 standard draft. \ + */ \ + \ + if (f == 1 || motion_h_code == 0) \ + comp_h_r = 0; \ + else \ + comp_h_r = f - 1 - motion_h_r; \ + \ + if (f == 1 || motion_v_code == 0) \ + comp_v_r = 0; \ + else \ + comp_v_r = f - 1 - motion_v_r; \ + \ + right_little = motion_h_code * f; \ + if (right_little == 0) \ + right_big = 0; \ + else { \ + if (right_little > 0) { \ + right_little = right_little - comp_h_r; \ + right_big = right_little - 32 * f; \ + } \ + else { \ + right_little = right_little + comp_h_r; \ + right_big = right_little + 32 * f; \ + } \ + } \ + \ + down_little = motion_v_code * f; \ + if (down_little == 0) \ + down_big = 0; \ + else { \ + if (down_little > 0) { \ + down_little = down_little - comp_v_r; \ + down_big = down_little - 32 * f; \ + } \ + else { \ + down_little = down_little + comp_v_r; \ + down_big = down_little + 32 * f; \ + } \ + } \ + \ + max = 16 * f - 1; \ + min = -16 * f; \ + \ + new_vector = recon_right_prev + right_little; \ + \ + if (new_vector <= max && new_vector >= min) \ + *recon_right_ptr = recon_right_prev + right_little; \ + /* just new_vector */ \ + else \ + *recon_right_ptr = recon_right_prev + right_big; \ + recon_right_prev = *recon_right_ptr; \ + if (full_pel_vector) \ + *recon_right_ptr = *recon_right_ptr << 1; \ + \ + new_vector = recon_down_prev + down_little; \ + if (new_vector <= max && new_vector >= min) \ + *recon_down_ptr = recon_down_prev + down_little; \ + /* just new_vector */ \ + else \ + *recon_down_ptr = recon_down_prev + down_big; \ + recon_down_prev = *recon_down_ptr; \ + if (full_pel_vector) \ + *recon_down_ptr = *recon_down_ptr << 1; \ +} + +/* + *-------------------------------------------------------------- + * + * ComputeForwVector -- + * + * Computes forward motion vector by calling ComputeVector + * with appropriate parameters. + * + * Results: + * Reconstructed motion vector placed in recon_right_for_ptr and + * recon_down_for_ptr. + * + * Side effects: + * None. + * + *-------------------------------------------------------------- + */ + +void +ComputeForwVector(int *recon_right_for_ptr, int *recon_down_for_ptr) +{ + + Pict *picture; + Macroblock *mblock; + + picture = &(curVidStream->picture); + mblock = &(curVidStream->mblock); + + ComputeVector(recon_right_for_ptr, recon_down_for_ptr, + mblock->recon_right_for_prev, + mblock->recon_down_for_prev, + picture->forw_f, picture->full_pel_forw_vector, + mblock->motion_h_forw_code, mblock->motion_v_forw_code, + mblock->motion_h_forw_r, mblock->motion_v_forw_r); +} + + +/* + *-------------------------------------------------------------- + * + * ComputeBackVector -- + * + * Computes backward motion vector by calling ComputeVector + * with appropriate parameters. + * + * Results: + * Reconstructed motion vector placed in recon_right_back_ptr and + * recon_down_back_ptr. + * + * Side effects: + * None. + * + *-------------------------------------------------------------- + */ + +void +ComputeBackVector(int *recon_right_back_ptr, int *recon_down_back_ptr) +{ + Pict *picture; + Macroblock *mblock; + + picture = &(curVidStream->picture); + mblock = &(curVidStream->mblock); + + ComputeVector(recon_right_back_ptr, recon_down_back_ptr, + mblock->recon_right_back_prev, + mblock->recon_down_back_prev, + picture->back_f, picture->full_pel_back_vector, + mblock->motion_h_back_code, mblock->motion_v_back_code, + mblock->motion_h_back_r, mblock->motion_v_back_r); + +} |