Home | History | Annotate | Download | only in rs 
      1 /*
      2  * Copyright (C) 2009 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ANDROID_RS_STREAM_H
     18 #define ANDROID_RS_STREAM_H
     19 
     20 #include <stdio.h>
     21 #include "rsUtils.h"
     22 
     23 // ---------------------------------------------------------------------------
     24 namespace android {
     25 namespace renderscript {
     26 
     27 class IStream {
     28 public:
     29     IStream(const uint8_t *, bool use64);
     30 
     31     float loadF() {
     32         mPos = (mPos + 3) & (~3);
     33         float tmp = reinterpret_cast<const float *>(&mData[mPos])[0];
     34         mPos += sizeof(float);
     35         return tmp;
     36     }
     37     int32_t loadI32() {
     38         mPos = (mPos + 3) & (~3);
     39         int32_t tmp = reinterpret_cast<const int32_t *>(&mData[mPos])[0];
     40         mPos += sizeof(int32_t);
     41         return tmp;
     42     }
     43     uint32_t loadU32() {
     44         mPos = (mPos + 3) & (~3);
     45         uint32_t tmp = reinterpret_cast<const uint32_t *>(&mData[mPos])[0];
     46         mPos += sizeof(uint32_t);
     47         return tmp;
     48     }
     49     uint16_t loadU16() {
     50         mPos = (mPos + 1) & (~1);
     51         uint16_t tmp = reinterpret_cast<const uint16_t *>(&mData[mPos])[0];
     52         mPos += sizeof(uint16_t);
     53         return tmp;
     54     }
     55     inline uint8_t loadU8() {
     56         uint8_t tmp = reinterpret_cast<const uint8_t *>(&mData[mPos])[0];
     57         mPos += sizeof(uint8_t);
     58         return tmp;
     59     }
     60     void loadByteArray(void *dest, size_t numBytes);
     61     uint64_t loadOffset();
     62     const char * loadString();
     63     uint64_t getPos() const {
     64         return mPos;
     65     }
     66     void reset(uint64_t pos) {
     67         mPos = pos;
     68     }
     69     void reset() {
     70         mPos = 0;
     71     }
     72 
     73     const uint8_t * getPtr() const {
     74         return mData;
     75     }
     76 protected:
     77     const uint8_t * mData;
     78     uint64_t mPos;
     79     bool mUse64;
     80 };
     81 
     82 class OStream {
     83 public:
     84     OStream(uint64_t length, bool use64);
     85     ~OStream();
     86 
     87     void align(uint32_t bytes) {
     88         mPos = (mPos + (bytes - 1)) & (~(bytes - 1));
     89         if (mPos >= mLength) {
     90             growSize();
     91         }
     92     }
     93 
     94     void addF(float v) {
     95         uint32_t uintV = *reinterpret_cast<uint32_t*> (&v);
     96         addU32(uintV);
     97     }
     98     void addI32(int32_t v) {
     99         mPos = (mPos + 3) & (~3);
    100         if (mPos + sizeof(v) >= mLength) {
    101             growSize();
    102         }
    103         mData[mPos++] = (uint8_t)(v & 0xff);
    104         mData[mPos++] = (uint8_t)((v >> 8) & 0xff);
    105         mData[mPos++] = (uint8_t)((v >> 16) & 0xff);
    106         mData[mPos++] = (uint8_t)((v >> 24) & 0xff);
    107     }
    108     void addU32(uint32_t v) {
    109         mPos = (mPos + 3) & (~3);
    110         if (mPos + sizeof(v) >= mLength) {
    111             growSize();
    112         }
    113         mData[mPos++] = (uint8_t)(v & 0xff);
    114         mData[mPos++] = (uint8_t)((v >> 8) & 0xff);
    115         mData[mPos++] = (uint8_t)((v >> 16) & 0xff);
    116         mData[mPos++] = (uint8_t)((v >> 24) & 0xff);
    117     }
    118     void addU16(uint16_t v) {
    119         mPos = (mPos + 1) & (~1);
    120         if (mPos + sizeof(v) >= mLength) {
    121             growSize();
    122         }
    123         mData[mPos++] = (uint8_t)(v & 0xff);
    124         mData[mPos++] = (uint8_t)(v >> 8);
    125     }
    126     inline void addU8(uint8_t v) {
    127         if (mPos + 1 >= mLength) {
    128             growSize();
    129         }
    130         reinterpret_cast<uint8_t *>(&mData[mPos])[0] = v;
    131         mPos ++;
    132     }
    133     void addByteArray(const void *src, size_t numBytes);
    134     void addOffset(uint64_t v);
    135     void addString(const char *name);
    136     void addString(const char *name, size_t len);
    137     uint64_t getPos() const {
    138         return mPos;
    139     }
    140     void reset(uint64_t pos) {
    141         mPos = pos;
    142     }
    143     void reset() {
    144         mPos = 0;
    145     }
    146     const uint8_t * getPtr() const {
    147         return mData;
    148     }
    149 protected:
    150     void growSize();
    151     uint8_t * mData;
    152     uint64_t mLength;
    153     uint64_t mPos;
    154     bool mUse64;
    155 };
    156 
    157 
    158 } // namespace renderscript
    159 } // namespace android
    160 #endif //ANDROID_RS_STREAM_H
    161 
    162 
    163