1 /* 2 * Copyright (C) 2014 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 #include <media/stagefright/DataURISource.h> 18 19 #include <media/stagefright/foundation/ABuffer.h> 20 #include <media/stagefright/foundation/AString.h> 21 #include <media/stagefright/foundation/base64.h> 22 23 namespace android { 24 25 // static 26 sp<DataURISource> DataURISource::Create(const char *uri) { 27 if (strncasecmp("data:", uri, 5)) { 28 return NULL; 29 } 30 31 char *commaPos = strrchr(uri, ','); 32 33 if (commaPos == NULL) { 34 return NULL; 35 } 36 37 sp<ABuffer> buffer; 38 39 AString tmp(&uri[5], commaPos - &uri[5]); 40 41 if (tmp.endsWith(";base64")) { 42 AString encoded(commaPos + 1); 43 44 // Strip CR and LF... 45 for (size_t i = encoded.size(); i-- > 0;) { 46 if (encoded.c_str()[i] == '\r' || encoded.c_str()[i] == '\n') { 47 encoded.erase(i, 1); 48 } 49 } 50 51 buffer = decodeBase64(encoded); 52 53 if (buffer == NULL) { 54 ALOGE("Malformed base64 encoded content found."); 55 return NULL; 56 } 57 } else { 58 #if 0 59 size_t dataLen = strlen(uri) - tmp.size() - 6; 60 buffer = new ABuffer(dataLen); 61 memcpy(buffer->data(), commaPos + 1, dataLen); 62 63 // unescape 64 #else 65 // MediaPlayer doesn't care for this right now as we don't 66 // play any text-based media. 67 return NULL; 68 #endif 69 } 70 71 // We don't really care about charset or mime type. 72 73 return new DataURISource(buffer); 74 } 75 76 DataURISource::DataURISource(const sp<ABuffer> &buffer) 77 : mBuffer(buffer) { 78 } 79 80 DataURISource::~DataURISource() { 81 } 82 83 status_t DataURISource::initCheck() const { 84 return OK; 85 } 86 87 ssize_t DataURISource::readAt(off64_t offset, void *data, size_t size) { 88 if ((offset < 0) || (offset >= (off64_t)mBuffer->size())) { 89 return 0; 90 } 91 92 size_t copy = mBuffer->size() - offset; 93 if (copy > size) { 94 copy = size; 95 } 96 97 memcpy(data, mBuffer->data() + offset, copy); 98 99 return copy; 100 } 101 102 status_t DataURISource::getSize(off64_t *size) { 103 *size = mBuffer->size(); 104 105 return OK; 106 } 107 108 } // namespace android 109 110