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92 lines
2.3 KiB
92 lines
2.3 KiB
4 months ago
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/*
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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 HTTP_BASE_H_
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#define HTTP_BASE_H_
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#include <media/DataSource.h>
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#include <media/stagefright/foundation/ABase.h>
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#include <media/stagefright/MediaErrors.h>
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#include <utils/KeyedVector.h>
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#include <utils/List.h>
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#include <utils/threads.h>
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namespace android {
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struct HTTPBase : public DataSource {
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enum Flags {
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// Don't log any URLs.
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kFlagIncognito = 1
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};
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HTTPBase();
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virtual status_t connect(
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const char *uri,
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const KeyedVector<String8, String8> *headers = NULL,
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off64_t offset = 0) = 0;
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virtual void disconnect() = 0;
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// Returns true if bandwidth could successfully be estimated,
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// false otherwise.
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virtual bool estimateBandwidth(int32_t *bandwidth_bps);
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virtual status_t getEstimatedBandwidthKbps(int32_t *kbps);
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virtual status_t setBandwidthStatCollectFreq(int32_t freqMs);
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virtual void setBandwidthHistorySize(size_t numHistoryItems);
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virtual String8 toString() {
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return mName;
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}
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protected:
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virtual void addBandwidthMeasurement(size_t numBytes, int64_t delayUs);
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String8 mName;
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private:
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struct BandwidthEntry {
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int64_t mDelayUs;
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size_t mNumBytes;
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};
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Mutex mLock;
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List<BandwidthEntry> mBandwidthHistory;
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size_t mNumBandwidthHistoryItems;
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int64_t mTotalTransferTimeUs;
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size_t mTotalTransferBytes;
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size_t mMaxBandwidthHistoryItems;
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enum {
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kMinBandwidthCollectFreqMs = 1000, // 1 second
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kMaxBandwidthCollectFreqMs = 60000, // one minute
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};
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int64_t mPrevBandwidthMeasureTimeUs;
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int32_t mPrevEstimatedBandWidthKbps;
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int32_t mBandWidthCollectFreqMs;
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DISALLOW_EVIL_CONSTRUCTORS(HTTPBase);
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};
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} // namespace android
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#endif // HTTP_BASE_H_
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