122 lines
2.9 KiB
C++
122 lines
2.9 KiB
C++
/*
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* Copyright (C) 2014 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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#include <datasource/DataURISource.h>
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#include <media/stagefright/foundation/ABuffer.h>
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#include <media/stagefright/foundation/AString.h>
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#include <media/stagefright/foundation/base64.h>
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namespace android {
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// static
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sp<DataURISource> DataURISource::Create(const char *uri) {
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if (strncasecmp("data:", uri, 5)) {
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return NULL;
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}
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const char *commaPos = strrchr(uri, ',');
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if (commaPos == NULL) {
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return NULL;
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}
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sp<ABuffer> buffer;
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AString tmp(&uri[5], commaPos - &uri[5]);
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if (tmp.endsWith(";base64")) {
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// strip all CR and LF characters.
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const char *src = commaPos+1;
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int len = strlen(src) + 1;
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char *cleansed = (char *) malloc(len);
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if (cleansed == NULL) return NULL;
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char *keeping = cleansed;
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int left = len;
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for (int i = 0; i < len ; i++)
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{
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const char c = *src++;
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if (c == '\r' || c == '\n') {
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continue;
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}
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*keeping++ = c;
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left--;
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}
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memset(keeping, 0, left);
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AString encoded(cleansed);
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free(cleansed);
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buffer = decodeBase64(encoded);
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if (buffer == NULL) {
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ALOGE("Malformed base64 encoded content found.");
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return NULL;
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}
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} else {
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#if 0
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size_t dataLen = strlen(uri) - tmp.size() - 6;
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buffer = new ABuffer(dataLen);
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memcpy(buffer->data(), commaPos + 1, dataLen);
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// unescape
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#else
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// MediaPlayer doesn't care for this right now as we don't
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// play any text-based media.
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return NULL;
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#endif
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}
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// We don't really care about charset or mime type.
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return new DataURISource(buffer);
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}
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DataURISource::DataURISource(const sp<ABuffer> &buffer)
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: mBuffer(buffer) {
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}
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DataURISource::~DataURISource() {
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}
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status_t DataURISource::initCheck() const {
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return OK;
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}
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ssize_t DataURISource::readAt(off64_t offset, void *data, size_t size) {
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if ((offset < 0) || (offset >= (off64_t)mBuffer->size())) {
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return 0;
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}
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size_t copy = mBuffer->size() - offset;
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if (copy > size) {
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copy = size;
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}
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memcpy(data, mBuffer->data() + offset, copy);
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return copy;
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}
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status_t DataURISource::getSize(off64_t *size) {
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*size = mBuffer->size();
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return OK;
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}
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} // namespace android
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