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Diffstat (limited to 'media/libstagefright/codecs/m4v_h263/dec/src/pp_semaphore_chroma_inter.cpp')
| -rw-r--r-- | media/libstagefright/codecs/m4v_h263/dec/src/pp_semaphore_chroma_inter.cpp | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/m4v_h263/dec/src/pp_semaphore_chroma_inter.cpp b/media/libstagefright/codecs/m4v_h263/dec/src/pp_semaphore_chroma_inter.cpp new file mode 100644 index 0000000..7c20222 --- /dev/null +++ b/media/libstagefright/codecs/m4v_h263/dec/src/pp_semaphore_chroma_inter.cpp @@ -0,0 +1,262 @@ +/* ------------------------------------------------------------------ + * 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 block used for prediction (int) + ypred = y-axis coordinate of the block used for prediction (int) + pp_dec_u = pointer to the post processing semaphore for chrominance + (uint8) + pstprcTypPrv = pointer the previous frame's post processing type + (uint8) + dx = horizontal component of the motion vector (int) + dy = vertical component of the motion vector (int) + mvwidth = number of blocks per row in the luminance VOP (int) + height = luminance VOP height in pixels (int) + size = total number of pixel in the current luminance VOP (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 + msk_deblock = flag indicating whether to perform deblocking + (msk_deblock = 0) or not (msk_deblock = 1) (uint8) + + Local Stores/Buffers/Pointers Needed: + None + + Global Stores/Buffers/Pointers Needed: + None + + Outputs: + None + + Pointers and Buffers Modified: + pp_dec_u contents are the updated semaphore propagation data + + Local Stores Modified: + None + + Global Stores Modified: + None + +------------------------------------------------------------------------------ + FUNCTION DESCRIPTION + + This functions performs post processing semaphore propagation processing + after chrominance prediction in interframe processing mode. + +*/ + + +/*---------------------------------------------------------------------------- +; 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 + ----------------------------------------------------------------------------*/ + void pp_semaphore_chroma_inter( + int xpred, /* i */ + int ypred, /* i */ + uint8 *pp_dec_u, /* i/o */ + uint8 *pstprcTypPrv, /* i */ + int dx, /* i */ + int dy, /* i */ + int mvwidth, /* i */ + int height, /* i */ + int32 size, /* i */ + int mv_loc, /* i */ + uint8 msk_deblock /* i */ + ) + { + /*---------------------------------------------------------------------------- + ; Define all local variables + ----------------------------------------------------------------------------*/ + int mmvy, mmvx, nmvy, nmvx; + uint8 *pp_prev1, *pp_prev2, *pp_prev3, *pp_prev4; + + /*---------------------------------------------------------------------------- + ; Function body here + ----------------------------------------------------------------------------*/ + + /* 09/28/2000, modify semaphore propagation to */ + /* accommodate smart indexing */ + mmvx = xpred >> 4; /* block x coor */ + nmvx = mmvx; + + mmvy = ypred >> 4; /* block y coor */ + nmvy = mmvy; + + /* Check if MV is outside the frame */ + if (mv_loc == 1) + { + /* Perform boundary check */ + if (nmvx < 0) + { + nmvx = 0; + } + else if (nmvx > mvwidth - 1) + { + nmvx = mvwidth - 1; + } + + if (nmvy < 0) + { + nmvy = 0; + } + else if (nmvy > (height >> 4) - 1) + { + nmvy = (height >> 4) - 1; + } + } + + /* Calculate pointer to first chrominance b semaphores in */ + /* pstprcTypPrv, i.e., first chrominance b semaphore is in */ + /* (pstprcTypPrv + (size>>6)). */ + /* Since total number of chrominance blocks per row in a VOP */ + /* is half of the total number of luminance blocks per row in a */ + /* VOP, we use (mvwidth >> 1) when calculating the row offset. */ + pp_prev1 = pstprcTypPrv + (size >> 6) + nmvx + nmvy * (mvwidth >> 1) ; + + /* Check if MV is a multiple of 16 */ + /* 1/5/01, make sure it doesn't go out of bound */ + if (((dy&0xF) != 0) && (mmvy + 1 < (height >> 4) - 1)) + { /* dy is not a multiple of 16 */ + + /* pp_prev3 is the block below pp_prev1 block */ + pp_prev3 = pp_prev1 + (mvwidth >> 1); + } + else + { /* dy is a multiple of 16 */ + pp_prev3 = pp_prev1; + } + + /* 1/5/01, make sure it doesn't go out of bound */ + if (((dx&0xF) != 0) && (mmvx + 1 < (mvwidth >> 1) - 1)) + { /* dx is not a multiple of 16 */ + + /* pp_prev2 is the block to the right of pp_prev1 block */ + pp_prev2 = pp_prev1 + 1; + + /* pp_prev4 is the block to the right of the block */ + /* below pp_prev1 block */ + pp_prev4 = pp_prev3 + 1; + } + else + { /* dx is a multiple of 16 */ + + pp_prev2 = pp_prev1; + pp_prev4 = pp_prev3; + } + + /* Advance offset to location of first Chrominance R semaphore in */ + /* pstprcTypPrv. Since the number of pixels in a Chrominance VOP */ + /* is (number of pixels in Luminance VOP/4), and there are 64 */ + /* pixels in an 8x8 Chrominance block, the offset can be */ + /* calculated as: */ + /* mv_loc = (number of pixels in Luminance VOP/(4*64)) */ + /* = size/256 = size>>8 */ + mv_loc = (size >> 8); + + /* 11/3/00, change the propagation for deblocking */ + if (msk_deblock == 0) + { + + /* Deblocking semaphore propagation for Chrominance */ + /* b semaphores */ + *(pp_dec_u) = 0; + + /* Advance offset to point to Chrominance r semaphores */ + pp_dec_u += mv_loc; + + /* Deblocking semaphore propagation for Chrominance */ + /* r semaphores */ + *(pp_dec_u) = 0; + } + else + { + /* Deringing semaphore propagation for Chrominance B block */ + if ((*(pp_dec_u)&4) == 0) + { + *(pp_dec_u) |= ((*(pp_prev1) | *(pp_prev2) | + *(pp_prev3) | *(pp_prev4)) & 0x4); + } + + /* Advance offset to point to Chrominance r semaphores */ + pp_dec_u += mv_loc; + pp_prev1 += mv_loc; + pp_prev2 += mv_loc; + pp_prev3 += mv_loc; + pp_prev4 += mv_loc; + + /* Deringing semaphore propagation for Chrominance R */ + if ((*(pp_dec_u)&4) == 0) + { + *(pp_dec_u) |= ((*(pp_prev1) | *(pp_prev2) | + *(pp_prev3) | *(pp_prev4)) & 0x4); + } + } + + /*---------------------------------------------------------------------------- + ; Return nothing or data or data pointer + ----------------------------------------------------------------------------*/ + return; + } +#ifdef __cplusplus +} +#endif + +#endif |