| /* |
| * Copyright (C) 2007-2008 ARM Limited |
| * |
| * 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. |
| * |
| */ |
| /** |
| * |
| * File Name: armVCM4P2_FillVLDBuffer.c |
| * OpenMAX DL: v1.0.2 |
| * Revision: 9641 |
| * Date: Thursday, February 7, 2008 |
| * |
| * |
| * |
| * |
| * Description: |
| * Contains module for VLC get bits from the stream |
| * |
| */ |
| |
| #include "omxtypes.h" |
| #include "armOMX.h" |
| |
| #include "armVCM4P2_ZigZag_Tables.h" |
| |
| |
| /** |
| * Function: armVCM4P2_FillVLDBuffer |
| * |
| * Description: |
| * Performs filling of the coefficient buffer according to the run, level |
| * and sign, also updates the index |
| * |
| * Parameters: |
| * [in] storeRun Stored Run value (count of zeros) |
| * [in] storeLevel Stored Level value (non-zero value) |
| * [in] sign Flag indicating the sign of level |
| * [in] last status of the last flag |
| * [in] pIndex pointer to coefficient index in 8x8 matrix |
| * [out] pIndex pointer to updated coefficient index in 8x8 |
| * matrix |
| * [in] pZigzagTable pointer to the zigzag tables |
| * [out] pDst pointer to the coefficient buffer of current |
| * block. Should be 32-bit aligned |
| * Return Value: |
| * Standard OMXResult result. See enumeration for possible result codes. |
| * |
| */ |
| |
| OMXResult armVCM4P2_FillVLDBuffer( |
| OMX_U32 storeRun, |
| OMX_S16 * pDst, |
| OMX_S16 storeLevel, |
| OMX_U8 sign, |
| OMX_U8 last, |
| OMX_U8 * pIndex, |
| const OMX_U8 * pZigzagTable |
| ) |
| { |
| /* Store the zero's as per the run length count */ |
| for (;storeRun > 0; storeRun--, (*pIndex)++) |
| { |
| pDst[pZigzagTable[*pIndex]] = 0; |
| } |
| /* Store the level depending on the sign*/ |
| if (sign == 1) |
| { |
| pDst[pZigzagTable[*pIndex]] = -storeLevel; |
| } |
| else |
| { |
| pDst[pZigzagTable[*pIndex]] = storeLevel; |
| } |
| (*pIndex)++; |
| |
| /* If last is 1, fill the remaining elments of the buffer with zeros */ |
| if (last == 1) |
| { |
| while (*pIndex < 64) |
| { |
| pDst[pZigzagTable[*pIndex]] = 0; |
| (*pIndex)++; |
| } |
| } |
| |
| return OMX_Sts_NoErr; |
| } |
| |
