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Diffstat (limited to 'media/libstagefright/codecs/m4v_h263/dec/src/pp_semaphore_luma.cpp')
| -rw-r--r-- | media/libstagefright/codecs/m4v_h263/dec/src/pp_semaphore_luma.cpp | 378 |
1 files changed, 378 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/m4v_h263/dec/src/pp_semaphore_luma.cpp b/media/libstagefright/codecs/m4v_h263/dec/src/pp_semaphore_luma.cpp new file mode 100644 index 0000000..b3a1ebd --- /dev/null +++ b/media/libstagefright/codecs/m4v_h263/dec/src/pp_semaphore_luma.cpp @@ -0,0 +1,378 @@ +/* ------------------------------------------------------------------ + * 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 |