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/*
* Copyright (C) 2009 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.
*/
#ifndef DATA_SOURCE_H_
#define DATA_SOURCE_H_
#include <sys/types.h>
#include <media/stagefright/MediaErrors.h>
#include <utils/Errors.h>
#include <utils/KeyedVector.h>
#include <utils/List.h>
#include <utils/RefBase.h>
#include <utils/threads.h>
#include <drm/DrmManagerClient.h>
#if !defined(STAGEFRIGHT_EXPORT)
#define STAGEFRIGHT_EXPORT
#endif
namespace android {
struct AMessage;
class String8;
class STAGEFRIGHT_EXPORT DataSource : public RefBase {
public:
enum Flags {
kWantsPrefetching = 1,
kStreamedFromLocalHost = 2,
kIsCachingDataSource = 4,
kIsHTTPBasedSource = 8,
};
static sp<DataSource> CreateFromURI(
const char *uri,
const KeyedVector<String8, String8> *headers = NULL);
DataSource() {}
virtual status_t initCheck() const = 0;
virtual ssize_t readAt(off64_t offset, void *data, size_t size) = 0;
// Convenience methods:
bool getUInt16(off64_t offset, uint16_t *x);
// May return ERROR_UNSUPPORTED.
virtual status_t getSize(off64_t *size);
virtual uint32_t flags() {
return 0;
}
virtual status_t reconnectAtOffset(off64_t offset) {
return ERROR_UNSUPPORTED;
}
////////////////////////////////////////////////////////////////////////////
bool sniff(String8 *mimeType, float *confidence, sp<AMessage> *meta);
// The sniffer can optionally fill in "meta" with an AMessage containing
// a dictionary of values that helps the corresponding extractor initialize
// its state without duplicating effort already exerted by the sniffer.
typedef bool (*SnifferFunc)(
const sp<DataSource> &source, String8 *mimeType,
float *confidence, sp<AMessage> *meta);
static void RegisterSniffer(SnifferFunc func);
static void RegisterDefaultSniffers();
// for DRM
virtual sp<DecryptHandle> DrmInitialization() {
return NULL;
}
virtual void getDrmInfo(sp<DecryptHandle> &handle, DrmManagerClient **client) {};
virtual String8 getUri() {
return String8();
}
virtual String8 getMIMEType() const;
protected:
virtual ~DataSource() {}
private:
static Mutex gSnifferMutex;
static List<SnifferFunc> gSniffers;
DataSource(const DataSource &);
DataSource &operator=(const DataSource &);
};
} // namespace android
#endif // DATA_SOURCE_H_
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