mirror of
https://github.com/oxen-io/session-android.git
synced 2024-12-23 16:37:30 +00:00
69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
|
||
|
|
*
|
||
|
|
* Use of this source code is governed by a BSD-style license
|
||
|
|
* that can be found in the LICENSE file in the root of the source
|
||
|
|
* tree. An additional intellectual property rights grant can be found
|
||
|
|
* in the file PATENTS. All contributing project authors may
|
||
|
|
* be found in the AUTHORS file in the root of the source tree.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef WEBRTC_MODULES_AUDIO_CODING_NETEQ_TIMESTAMP_SCALER_H_
|
||
|
|
#define WEBRTC_MODULES_AUDIO_CODING_NETEQ_TIMESTAMP_SCALER_H_
|
||
|
|
|
||
|
|
#include "webrtc/base/constructormagic.h"
|
||
|
|
#include "webrtc/modules/audio_coding/neteq/packet.h"
|
||
|
|
#include "webrtc/typedefs.h"
|
||
|
|
|
||
|
|
namespace webrtc {
|
||
|
|
|
||
|
|
// Forward declaration.
|
||
|
|
class DecoderDatabase;
|
||
|
|
|
||
|
|
// This class scales timestamps for codecs that need timestamp scaling.
|
||
|
|
// This is done for codecs where one RTP timestamp does not correspond to
|
||
|
|
// one sample.
|
||
|
|
class TimestampScaler {
|
||
|
|
public:
|
||
|
|
explicit TimestampScaler(const DecoderDatabase& decoder_database)
|
||
|
|
: first_packet_received_(false),
|
||
|
|
numerator_(1),
|
||
|
|
denominator_(1),
|
||
|
|
external_ref_(0),
|
||
|
|
internal_ref_(0),
|
||
|
|
decoder_database_(decoder_database) {}
|
||
|
|
|
||
|
|
virtual ~TimestampScaler() {}
|
||
|
|
|
||
|
|
// Start over.
|
||
|
|
virtual void Reset() { first_packet_received_ = false; }
|
||
|
|
|
||
|
|
// Scale the timestamp in |packet| from external to internal.
|
||
|
|
virtual void ToInternal(Packet* packet);
|
||
|
|
|
||
|
|
// Scale the timestamp for all packets in |packet_list| from external to
|
||
|
|
// internal.
|
||
|
|
virtual void ToInternal(PacketList* packet_list);
|
||
|
|
|
||
|
|
// Returns the internal equivalent of |external_timestamp|, given the
|
||
|
|
// RTP payload type |rtp_payload_type|.
|
||
|
|
virtual uint32_t ToInternal(uint32_t external_timestamp,
|
||
|
|
uint8_t rtp_payload_type);
|
||
|
|
|
||
|
|
// Scales back to external timestamp. This is the inverse of ToInternal().
|
||
|
|
virtual uint32_t ToExternal(uint32_t internal_timestamp) const;
|
||
|
|
|
||
|
|
private:
|
||
|
|
bool first_packet_received_;
|
||
|
|
int numerator_;
|
||
|
|
int denominator_;
|
||
|
|
uint32_t external_ref_;
|
||
|
|
uint32_t internal_ref_;
|
||
|
|
const DecoderDatabase& decoder_database_;
|
||
|
|
|
||
|
|
DISALLOW_COPY_AND_ASSIGN(TimestampScaler);
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace webrtc
|
||
|
|
#endif // WEBRTC_MODULES_AUDIO_CODING_NETEQ_TIMESTAMP_SCALER_H_
|