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Diffstat (limited to 'benchmarks/CHStone/motion/motion.c')
| -rwxr-xr-x | benchmarks/CHStone/motion/motion.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/benchmarks/CHStone/motion/motion.c b/benchmarks/CHStone/motion/motion.c new file mode 100755 index 0000000..8d490a0 --- /dev/null +++ b/benchmarks/CHStone/motion/motion.c @@ -0,0 +1,172 @@ +/* ++--------------------------------------------------------------------------+ +| CHStone : a suite of benchmark programs for C-based High-Level Synthesis | +| ======================================================================== | +| | +| * Collected and Modified : Y. Hara, H. Tomiyama, S. Honda, | +| H. Takada and K. Ishii | +| Nagoya University, Japan | +| | +| * Remark : | +| 1. This source code is modified to unify the formats of the benchmark | +| programs in CHStone. | +| 2. Test vectors are added for CHStone. | +| 3. If "main_result" is 0 at the end of the program, the program is | +| correctly executed. | +| 4. Please follow the copyright of each benchmark program. | ++--------------------------------------------------------------------------+ +*/ +/* motion.c, motion vector decoding */ + +/* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */ + +/* + * Disclaimer of Warranty + * + * These software programs are available to the user without any license fee or + * royalty on an "as is" basis. The MPEG Software Simulation Group disclaims + * any and all warranties, whether express, implied, or statuary, including any + * implied warranties or merchantability or of fitness for a particular + * purpose. In no event shall the copyright-holder be liable for any + * incidental, punitive, or consequential damages of any kind whatsoever + * arising from the use of these programs. + * + * This disclaimer of warranty extends to the user of these programs and user's + * customers, employees, agents, transferees, successors, and assigns. + * + * The MPEG Software Simulation Group does not represent or warrant that the + * programs furnished hereunder are free of infringement of any third-party + * patents. + * + * Commercial implementations of MPEG-1 and MPEG-2 video, including shareware, + * are subject to royalty fees to patent holders. Many of these patents are + * general enough such that they are unavoidable regardless of implementation + * design. + * + */ + +/* private prototypes */ +static void decode_motion_vector +_ANSI_ARGS_ ((int *pred, int r_size, int motion_code, + int motion_residualesidual, int full_pel_vector)); + +/* ISO/IEC 13818-2 sections 6.2.5.2, 6.3.17.2, and 7.6.3: Motion vectors */ +void +motion_vectors (PMV, dmvector, motion_vertical_field_select, s, + motion_vector_count, mv_format, h_r_size, v_r_size, dmv, + mvscale) + int PMV[2][2][2]; + int dmvector[2]; + int motion_vertical_field_select[2][2]; + int s, motion_vector_count, mv_format, h_r_size, v_r_size, dmv, mvscale; +{ + if (motion_vector_count == 1) + { + if (mv_format == MV_FIELD && !dmv) + { + motion_vertical_field_select[1][s] = + motion_vertical_field_select[0][s] = Get_Bits (1); + } + + motion_vector (PMV[0][s], dmvector, h_r_size, v_r_size, dmv, mvscale, + 0); + + /* update other motion vector predictors */ + PMV[1][s][0] = PMV[0][s][0]; + PMV[1][s][1] = PMV[0][s][1]; + } + else + { + motion_vertical_field_select[0][s] = Get_Bits (1); + + motion_vector (PMV[0][s], dmvector, h_r_size, v_r_size, dmv, mvscale, + 0); + + motion_vertical_field_select[1][s] = Get_Bits (1); + + motion_vector (PMV[1][s], dmvector, h_r_size, v_r_size, dmv, mvscale, + 0); + } +} + +/* get and decode motion vector and differential motion vector + for one prediction */ +void +motion_vector (PMV, dmvector, h_r_size, v_r_size, dmv, mvscale, + full_pel_vector) + int *PMV; + int *dmvector; + int h_r_size; + int v_r_size; + int dmv; /* MPEG-2 only: get differential motion vectors */ + int mvscale; /* MPEG-2 only: field vector in frame pic */ + int full_pel_vector; /* MPEG-1 only */ +{ + int motion_code; + int motion_residual; + + /* horizontal component */ + /* ISO/IEC 13818-2 Table B-10 */ + motion_code = Get_motion_code (); + + motion_residual = (h_r_size != 0 + && motion_code != 0) ? Get_Bits (h_r_size) : 0; + + decode_motion_vector (&PMV[0], h_r_size, motion_code, motion_residual, + full_pel_vector); + + if (dmv) + dmvector[0] = Get_dmvector (); + + + /* vertical component */ + motion_code = Get_motion_code (); + motion_residual = (v_r_size != 0 + && motion_code != 0) ? Get_Bits (v_r_size) : 0; + + if (mvscale) + PMV[1] >>= 1; /* DIV 2 */ + + decode_motion_vector (&PMV[1], v_r_size, motion_code, motion_residual, + full_pel_vector); + + if (mvscale) + PMV[1] <<= 1; + + if (dmv) + dmvector[1] = Get_dmvector (); + +} + +/* calculate motion vector component */ +/* ISO/IEC 13818-2 section 7.6.3.1: Decoding the motion vectors */ +/* Note: the arithmetic here is more elegant than that which is shown + in 7.6.3.1. The end results (PMV[][][]) should, however, be the same. */ + +static void +decode_motion_vector (pred, r_size, motion_code, motion_residual, + full_pel_vector) + int *pred; + int r_size, motion_code, motion_residual; + int full_pel_vector; /* MPEG-1 (ISO/IEC 11172-1) support */ +{ + int lim, vec; + + r_size = r_size % 32; + lim = 16 << r_size; + vec = full_pel_vector ? (*pred >> 1) : (*pred); + + if (motion_code > 0) + { + vec += ((motion_code - 1) << r_size) + motion_residual + 1; + if (vec >= lim) + vec -= lim + lim; + } + else if (motion_code < 0) + { + vec -= ((-motion_code - 1) << r_size) + motion_residual + 1; + if (vec < -lim) + vec += lim + lim; + } + *pred = full_pel_vector ? (vec << 1) : vec; +} |