c27986a3c2
This change adds the libOpenglCodecCommon, which holds shared code between the encoder and the decoder parts of the opengl codec. The library is built as static with both a target version and a host version. Change-Id: I163eea8fdb635620e6cde9d1d75c3e7369953213
91 lines
2.2 KiB
C++
91 lines
2.2 KiB
C++
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __IO_STREAM_H__
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#define __IO_STREAM_H__
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#include <stdlib.h>
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#include <stdio.h>
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#include "ErrorLog.h"
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class IOStream {
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public:
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IOStream(size_t bufSize) {
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m_buf = NULL;
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m_bufsize = bufSize;
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m_free = 0;
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}
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virtual void *allocBuffer(size_t minSize) = 0;
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virtual int commitBuffer(size_t size) = 0;
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virtual const unsigned char *readFully( void *buf, size_t len) = 0;
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virtual ~IOStream() {
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// NOTE: m_buf is 'owned' by the child class thus we expect it to be released by it
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}
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unsigned char *alloc(size_t len) {
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if (m_buf && len > m_free) {
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if (flush() < 0) {
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ERR("Failed to flush in alloc\n");
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return NULL; // we failed to flush so something is wrong
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}
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}
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if (!m_buf || len > m_bufsize) {
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int allocLen = m_bufsize < len ? len : m_bufsize;
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m_buf = (unsigned char *)allocBuffer(allocLen);
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if (!m_buf) {
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ERR("Alloc (%u bytes) failed\n", allocLen);
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return NULL;
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}
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m_bufsize = m_free = allocLen;
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}
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unsigned char *ptr;
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ptr = m_buf + (m_bufsize - m_free);
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m_free -= len;
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return ptr;
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}
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int flush() {
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if (!m_buf || m_free == m_bufsize) return 0;
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int stat = commitBuffer(m_bufsize - m_free);
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m_buf = NULL;
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m_free = 0;
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return stat;
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}
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const unsigned char *readback(void *buf, size_t len) {
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flush();
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return readFully(buf, len);
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}
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private:
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unsigned char *m_buf;
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size_t m_bufsize;
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size_t m_free;
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};
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#endif
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