/* ------------------------------------------------------------------ * Copyright (C) 1998-2009 PacketVideo * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either * express or implied. * See the License for the specific language governing permissions * and limitations under the License. * ------------------------------------------------------------------- */ /* ------------------------------------------------------------------------------ INPUT AND OUTPUT DEFINITIONS Inputs: xpred = x-axis coordinate of the MB used for prediction (int) ypred = y-axis coordinate of the MB used for prediction (int) pp_dec_y = pointer to the post processing semaphore for current luminance frame (uint8) pstprcTypPrv = pointer the previous frame's post processing type (uint8) ll = pointer to the buffer (int) mv_loc = flag indicating location of the motion compensated (x,y) position with respect to the luminance MB (int); 0 -> inside MB, 1 -> outside MB dx = horizontal component of the motion vector (int) dy = vertical component of the motion vector (int) mvwidth = number of blocks per row (int) width = luminance VOP width in pixels (int) height = luminance VOP height in pixels (int) Local Stores/Buffers/Pointers Needed: None Global Stores/Buffers/Pointers Needed: None Outputs: msk_deblock = flag that indicates whether deblocking is to be performed (msk_deblock = 0) or not (msk_deblock = 1) (uint8) Pointers and Buffers Modified: pp_dec_y contents are the updated semapohore propagation data Local Stores Modified: None Global Stores Modified: None ------------------------------------------------------------------------------ FUNCTION DESCRIPTION This functions performs post processing semaphore propagation processing after luminance prediction. */ /*---------------------------------------------------------------------------- ; INCLUDES ----------------------------------------------------------------------------*/ #include "mp4dec_api.h" #include "mp4def.h" /*---------------------------------------------------------------------------- ; MACROS ; Define module specific macros here ----------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------- ; DEFINES ; Include all pre-processor statements here. Include conditional ; compile variables also. ----------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------- ; LOCAL FUNCTION DEFINITIONS ; Function Prototype declaration ----------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------- ; LOCAL STORE/BUFFER/POINTER DEFINITIONS ; Variable declaration - defined here and used outside this module ----------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------- ; EXTERNAL FUNCTION REFERENCES ; Declare functions defined elsewhere and referenced in this module ----------------------------------------------------------------------------*/ /*---------------------------------------------------------------------------- ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES ; Declare variables used in this module but defined elsewhere ----------------------------------------------------------------------------*/ #ifdef PV_POSTPROC_ON #ifdef __cplusplus extern "C" { #endif /*---------------------------------------------------------------------------- ; FUNCTION CODE ----------------------------------------------------------------------------*/ uint8 pp_semaphore_luma( int xpred, /* i */ int ypred, /* i */ uint8 *pp_dec_y, /* i/o */ uint8 *pstprcTypPrv, /* i */ int *ll, /* i */ int *mv_loc, /* i/o */ int dx, /* i */ int dy, /* i */ int mvwidth, /* i */ int width, /* i */ int height /* i */ ) { /*---------------------------------------------------------------------------- ; Define all local variables ----------------------------------------------------------------------------*/ int kk, mmvy, mmvx, nmvx, nmvy; uint8 *pp_prev1, *pp_prev2, *pp_prev3, *pp_prev4; uint8 msk_deblock = 0; /* 11/3/00 */ /*---------------------------------------------------------------------------- ; Function body here ----------------------------------------------------------------------------*/ /* Interframe Processing - 1 MV per MB */ /* check whether the MV points outside the frame */ if (xpred >= 0 && xpred <= ((width << 1) - (2*MB_SIZE)) && ypred >= 0 && ypred <= ((height << 1) - (2*MB_SIZE))) { /*****************************/ /* (x,y) is inside the frame */ /*****************************/ /* 10/24/2000 post_processing semaphore */ /* generation */ /* 10/23/2000 no boundary checking*/ *mv_loc = 0; /* Calculate block x coordinate. Divide by 16 is for */ /* converting half-pixel resolution to block */ mmvx = xpred >> 4; /* Calculate block y coordinate. Divide by 16 is for */ /* converting half-pixel resolution to block */ mmvy = ypred >> 4; /* Find post processing semaphore location for block */ /* used for prediction, i.e., */ /* pp_prev1 = &pstprcTypPrv[mmvy*mvwidth][mmvx] */ pp_prev1 = pstprcTypPrv + mmvx + mmvy * mvwidth; /* Check if MV is a multiple of 16 */ if ((dx&0xF) != 0) { /* dx is not a multiple of 16 */ /* pp_prev2 is the block to the right of */ /* pp_prev1 block */ pp_prev2 = pp_prev1 + 1; if ((dy&0xF) != 0) { /* dy is not a multiple of 16 */ /* pp_prev3 is the block below */ /* pp_prev1 block */ pp_prev3 = pp_prev1 + mvwidth; } else { /* dy is a multiple of 16 */ pp_prev3 = pp_prev1; } /* pp_prev4 is the block to the right of */ /* pp_prev3 block. */ pp_prev4 = pp_prev3 + 1; } else { /* dx is a multiple of 16 */ pp_prev2 = pp_prev1; if ((dy&0xF) != 0) { /* dy is not a multiple of 16 */ /* pp_prev3 is the block below */ /* pp_prev1 block. */ pp_prev3 = pp_prev1 + mvwidth; } else { /* dy is a multiple of 16 */ pp_prev3 = pp_prev1; msk_deblock = 0x3; } pp_prev4 = pp_prev3; } /* Perform post processing semaphore propagation for each */ /* of the 4 blocks in a MB. */ for (kk = 0; kk < 4; kk++) { /* Deringing semaphore propagation */ if ((*(pp_dec_y) & 4) == 0) { *(pp_dec_y) |= ((*(pp_prev1) | *(pp_prev2) | *(pp_prev3) | *(pp_prev4)) & 0x4); } /* Deblocking semaphore propagation */ /* 11/3/00, change the propagation for deblocking */ if (msk_deblock == 0) { *(pp_dec_y) = 0; } pp_dec_y += ll[kk]; pp_prev1 += ll[kk]; pp_prev2 += ll[kk]; pp_prev3 += ll[kk]; pp_prev4 += ll[kk]; } } else { /******************************/ /* (x,y) is outside the frame */ /******************************/ /* 10/24/2000 post_processing semaphore */ /* generation */ /* 10/23/2000 boundary checking*/ *mv_loc = 1; /* Perform post processing semaphore propagation for each */ /* of the 4 blocks in a MB. */ for (kk = 0; kk < 4; kk++) { /* Calculate block x coordinate and round (?). */ /* Divide by 16 is for converting half-pixel */ /* resolution to block. */ mmvx = (xpred + ((kk & 1) << 3)) >> 4; nmvx = mmvx; /* Calculate block y coordinate and round (?). */ /* Divide by 16 is for converting half-pixel */ /* resolution to block. */ mmvy = (ypred + ((kk & 2) << 2)) >> 4; nmvy = mmvy; /* Perform boundary checking */ if (nmvx < 0) { nmvx = 0; } else if (nmvx > mvwidth - 1) { nmvx = mvwidth - 1; } if (nmvy < 0) { nmvy = 0; } else if (nmvy > (height >> 3) - 1) { nmvy = (height >> 3) - 1; } /* Find post processing semaphore location for block */ /* used for prediction, i.e., */ /* pp_prev1 = &pstprcTypPrv[nmvy*mvwidth][nmvx] */ pp_prev1 = pstprcTypPrv + nmvx + nmvy * mvwidth; /* Check if x component of MV is a multiple of 16 */ /* and check if block x coordinate is out of bounds */ if (((dx&0xF) != 0) && (mmvx + 1 < mvwidth - 1)) { /* dx is not a multiple of 16 and the block */ /* x coordinate is within the bounds */ /* pp_prev2 is the block to the right of */ /* pp_prev1 block */ pp_prev2 = pp_prev1 + 1; /* Check if y component of MV is a multiple */ /* of 16 and check if block y coordinate is */ /* out of bounds */ if (((dy&0xF) != 0) && (mmvy + 1 < (height >> 3) - 1)) { /* dy is not a multiple of 16 and */ /* the block y coordinate is */ /* within the bounds */ /* pp_prev3 is the block below */ /* pp_prev1 block */ pp_prev3 = pp_prev1 + mvwidth; /* all prediction are from different blocks */ msk_deblock = 0x3; } else { /* dy is a multiple of 16 or the block */ /* y coordinate is out of bounds */ pp_prev3 = pp_prev1; } /* pp_prev4 is the block to the right of */ /* pp_prev3 block. */ pp_prev4 = pp_prev3 + 1; } else { /* dx is a multiple of 16 or the block x */ /* coordinate is out of bounds */ pp_prev2 = pp_prev1; /* Check if y component of MV is a multiple */ /* of 16 and check if block y coordinate is */ /* out of bounds */ if (((dy&0xF) != 0) && (mmvy + 1 < (height >> 3) - 1)) { /* dy is not a multiple of 16 and */ /* the block y coordinate is */ /* within the bounds */ /* pp_prev3 is the block below */ /* pp_prev1 block. */ pp_prev3 = pp_prev1 + mvwidth; } else { /* dy is a multiple of 16 or the block */ /* y coordinate is out of bounds */ pp_prev3 = pp_prev1; } pp_prev4 = pp_prev3; } /* Deringing semaphore propagation */ if ((*(pp_dec_y)&4) == 0) { *(pp_dec_y) |= ((*(pp_prev1) | *(pp_prev2) | *(pp_prev3) | *(pp_prev4)) & 0x4); } /* Deblocking semaphore propagation */ /* 11/3/00, change the propaga= */ /* tion for deblocking */ if (msk_deblock == 0) { *(pp_dec_y) = 0; } pp_dec_y += ll[kk]; } } /*---------------------------------------------------------------------------- ; Return nothing or data or data pointer ----------------------------------------------------------------------------*/ return (msk_deblock); } #ifdef __cplusplus } #endif #endif