Opengl implementation - codec common code

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

tools/emulator/opengl/system/OpenglCodecCommon/TcpStream.cpp

@@ -0,0 +1,231 @@
+/*
+* Copyright (C) 2011 The Android Open Source Project
+*
+* 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.
+*/
+#include "TcpStream.h"
+
+#ifdef ANDROID
+#include <netinet/in.h>
+#endif
+
+#include <errno.h>
+#include <netdb.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+TcpStream::TcpStream(size_t bufSize) :  IOStream(bufSize)
+{
+    m_sock = socket(AF_INET, SOCK_STREAM, 0);
+    m_bufsize = bufSize;
+    m_buf = NULL;
+}
+
+TcpStream::TcpStream(int sock, size_t bufSize) :
+    IOStream(bufSize),
+    m_sock(sock),
+    m_bufsize(bufSize),
+    m_buf(NULL)
+{
+
+}
+
+TcpStream::~TcpStream()
+{
+    if (m_sock >= 0) {
+        ::close(m_sock);
+    }
+    if (m_buf != NULL) {
+        free(m_buf);
+    }
+}
+
+
+int TcpStream::listen(unsigned short port, bool localhost_only, bool reuse_address)
+{
+    if (!valid()) return int(ERR_INVALID_SOCKET);
+
+    // NOTE: This is a potential security issue. However, since we accept connection
+    // from local host only, this should be reasonably OK.
+
+    if (reuse_address) {
+        int one = 1;
+        if (setsockopt(m_sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0) {
+            perror("setsockopt resuseaddr");
+        }
+    }
+
+    struct sockaddr_in addr;
+    memset(&addr, 0, sizeof(addr));
+
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(port);
+    if (localhost_only) {
+        addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+    } else {
+        addr.sin_addr.s_addr = INADDR_ANY;
+    }
+
+    if (::bind(m_sock, (const sockaddr *) &addr, sizeof(addr)) < 0) {
+        perror("bind");
+        return -1;
+    }
+    if (::listen(m_sock, 5) < 0) {
+        perror("listen");
+        return -1;
+    }
+    return 0;
+}
+
+TcpStream * TcpStream::accept()
+{
+    int clientSock = -1;
+
+    while (true) {
+        struct sockaddr_in addr;
+        socklen_t len = sizeof(addr);
+        clientSock = ::accept(m_sock, (sockaddr *)&addr, &len);
+
+        if (clientSock < 0 && errno == EINTR) {
+            continue;
+        }
+        break;
+    }
+
+    TcpStream *clientStream = NULL;
+
+    if (clientSock >= 0) {
+        clientStream =  new TcpStream(clientSock, m_bufsize);
+    }
+    return clientStream;
+}
+
+
+int TcpStream::connect(const char *hostname, unsigned short port)
+{
+    struct addrinfo *ai;
+    char portstr[10];
+    snprintf(portstr, sizeof(portstr), "%d", port);
+
+    if (getaddrinfo(hostname, portstr, NULL, &ai) != 0) {
+        return -1;
+    }
+
+    struct addrinfo *i;
+    i = ai;
+    while (i != NULL) {
+        if (::connect(m_sock, i->ai_addr, i->ai_addrlen) >= 0) {
+            break;
+        } else {
+            if (errno != EINTR) {
+                i = i->ai_next;
+            }
+        }
+    }
+
+    freeaddrinfo(ai);
+    if (i == NULL) return -1;
+
+    return 0;
+}
+
+void *TcpStream::allocBuffer(size_t minSize)
+{
+    size_t allocSize = (m_bufsize < minSize ? minSize : m_bufsize);
+    if (!m_buf) {
+        m_buf = (unsigned char *)malloc(allocSize);
+    }
+    else if (m_bufsize < allocSize) {
+        unsigned char *p = (unsigned char *)realloc(m_buf, allocSize);
+        if (p != NULL) {
+            m_buf = p;
+            m_bufsize = allocSize;
+        } else {
+            ERR("realloc (%d) failed\n", allocSize);
+            free(m_buf);
+            m_buf = NULL;
+            m_bufsize = 0;
+        }
+    }
+
+    return m_buf;
+};
+
+int TcpStream::commitBuffer(size_t size)
+{
+    return writeFully(m_buf, size);
+}
+
+int TcpStream::writeFully(const void *buf, size_t len)
+{
+    if (!valid()) return -1;
+
+    size_t res = len;
+    int retval = 0;
+
+    while (res > 0) {
+        ssize_t stat = ::send(m_sock, (unsigned char *)(buf) + (len - res), res, 0);
+        if (stat < 0) {
+            if (errno != EINTR) {
+                retval =  stat;
+                break;
+            }
+        } else {
+            res -= stat;
+        }
+    }
+    return retval;
+}
+
+const unsigned char *TcpStream::readFully(void *buf, size_t len)
+{
+    if (!valid()) return NULL;
+    if (!buf) return NULL;  // do not allow NULL buf in that implementation
+    size_t res = len;
+    while (res > 0) {
+        ssize_t stat = ::recv(m_sock, (unsigned char *)(buf) + len - res, len, MSG_WAITALL);
+        if (stat == 0) {
+            // client shutdown;
+            return NULL;
+        } else if (stat < 0) {
+            if (errno == EINTR) {
+                continue;
+            } else {
+                return NULL;
+            }
+        } else {
+            res -= stat;
+        }
+    }
+    return (const unsigned char *)buf;
+}
+
+int TcpStream::recv(void *buf, size_t len)
+{
+    if (!valid()) return int(ERR_INVALID_SOCKET);
+    int res = 0;
+    while(true) {
+        res = ::recv(m_sock, buf, len, 0);
+        if (res < 0) {
+            if (errno == EINTR) {
+                continue;
+            }
+        }
+        break;
+    }
+    return res;
+}