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/*
* Copyright (C) 2010 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 A_SESSION_DESCRIPTION_H_
#define A_SESSION_DESCRIPTION_H_
#include <sys/types.h>
#include <media/stagefright/foundation/ABase.h>
#include <utils/KeyedVector.h>
#include <utils/RefBase.h>
#include <utils/Vector.h>
namespace android {
struct AString;
struct ASessionDescription : public RefBase {
ASessionDescription();
bool setTo(const void *data, size_t size);
bool isValid() const;
// Actually, 1 + number of tracks, as index 0 is reserved for the
// session description root-level attributes.
size_t countTracks() const;
void getFormat(size_t index, AString *value) const;
void getFormatType(
size_t index, unsigned long *PT,
AString *desc, AString *params) const;
bool getDimensions(
size_t index, unsigned long PT,
int32_t *width, int32_t *height) const;
bool getDurationUs(int64_t *durationUs) const;
static void ParseFormatDesc(
const char *desc, int32_t *timescale, int32_t *numChannels);
bool findAttribute(size_t index, const char *key, AString *value) const;
// parses strings of the form
// npt := npt-time "-" npt-time? | "-" npt-time
// npt-time := "now" | [0-9]+("." [0-9]*)?
//
// Returns true iff both "npt1" and "npt2" times were available,
// i.e. we have a fixed duration, otherwise this is live streaming.
static bool parseNTPRange(const char *s, float *npt1, float *npt2);
protected:
virtual ~ASessionDescription();
private:
typedef KeyedVector<AString,AString> Attribs;
bool mIsValid;
Vector<Attribs> mTracks;
Vector<AString> mFormats;
bool parse(const void *data, size_t size);
DISALLOW_EVIL_CONSTRUCTORS(ASessionDescription);
};
} // namespace android
#endif // A_SESSION_DESCRIPTION_H_
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