kopia lustrzana https://github.com/ryukoposting/Signal-Android
198 wiersze
7.0 KiB
C
198 wiersze
7.0 KiB
C
/* Copyright (C) 2002 Jean-Marc Valin */
|
|
/**
|
|
@file speex_jitter.h
|
|
@brief Adaptive jitter buffer for Speex
|
|
*/
|
|
/*
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
- Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
- Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
- Neither the name of the Xiph.org Foundation nor the names of its
|
|
contributors may be used to endorse or promote products derived from
|
|
this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
|
|
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
*/
|
|
|
|
#ifndef SPEEX_JITTER_H
|
|
#define SPEEX_JITTER_H
|
|
/** @defgroup JitterBuffer JitterBuffer: Adaptive jitter buffer
|
|
* This is the jitter buffer that reorders UDP/RTP packets and adjusts the buffer size
|
|
* to maintain good quality and low latency.
|
|
* @{
|
|
*/
|
|
|
|
#include "speex/speex_types.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/** Generic adaptive jitter buffer state */
|
|
struct JitterBuffer_;
|
|
|
|
/** Generic adaptive jitter buffer state */
|
|
typedef struct JitterBuffer_ JitterBuffer;
|
|
|
|
/** Definition of an incoming packet */
|
|
typedef struct _JitterBufferPacket JitterBufferPacket;
|
|
|
|
/** Definition of an incoming packet */
|
|
struct _JitterBufferPacket {
|
|
char *data; /**< Data bytes contained in the packet */
|
|
spx_uint32_t len; /**< Length of the packet in bytes */
|
|
spx_uint32_t timestamp; /**< Timestamp for the packet */
|
|
spx_uint32_t span; /**< Time covered by the packet (same units as timestamp) */
|
|
spx_uint16_t sequence; /**< RTP Sequence number if available (0 otherwise) */
|
|
spx_uint32_t user_data; /**< Put whatever data you like here (it's ignored by the jitter buffer) */
|
|
};
|
|
|
|
/** Packet has been retrieved */
|
|
#define JITTER_BUFFER_OK 0
|
|
/** Packet is lost or is late */
|
|
#define JITTER_BUFFER_MISSING 1
|
|
/** A "fake" packet is meant to be inserted here to increase buffering */
|
|
#define JITTER_BUFFER_INSERTION 2
|
|
/** There was an error in the jitter buffer */
|
|
#define JITTER_BUFFER_INTERNAL_ERROR -1
|
|
/** Invalid argument */
|
|
#define JITTER_BUFFER_BAD_ARGUMENT -2
|
|
|
|
|
|
/** Set minimum amount of extra buffering required (margin) */
|
|
#define JITTER_BUFFER_SET_MARGIN 0
|
|
/** Get minimum amount of extra buffering required (margin) */
|
|
#define JITTER_BUFFER_GET_MARGIN 1
|
|
/* JITTER_BUFFER_SET_AVAILABLE_COUNT wouldn't make sense */
|
|
|
|
/** Get the amount of available packets currently buffered */
|
|
#define JITTER_BUFFER_GET_AVAILABLE_COUNT 3
|
|
/** Included because of an early misspelling (will remove in next release) */
|
|
#define JITTER_BUFFER_GET_AVALIABLE_COUNT 3
|
|
|
|
/** Assign a function to destroy unused packet. When setting that, the jitter
|
|
buffer no longer copies packet data. */
|
|
#define JITTER_BUFFER_SET_DESTROY_CALLBACK 4
|
|
/** */
|
|
#define JITTER_BUFFER_GET_DESTROY_CALLBACK 5
|
|
|
|
/** Tell the jitter buffer to only adjust the delay in multiples of the step parameter provided */
|
|
#define JITTER_BUFFER_SET_DELAY_STEP 6
|
|
/** */
|
|
#define JITTER_BUFFER_GET_DELAY_STEP 7
|
|
|
|
/** Tell the jitter buffer to only do concealment in multiples of the size parameter provided */
|
|
#define JITTER_BUFFER_SET_CONCEALMENT_SIZE 8
|
|
#define JITTER_BUFFER_GET_CONCEALMENT_SIZE 9
|
|
|
|
/** Absolute max amount of loss that can be tolerated regardless of the delay. Typical loss
|
|
should be half of that or less. */
|
|
#define JITTER_BUFFER_SET_MAX_LATE_RATE 10
|
|
#define JITTER_BUFFER_GET_MAX_LATE_RATE 11
|
|
|
|
/** Equivalent cost of one percent late packet in timestamp units */
|
|
#define JITTER_BUFFER_SET_LATE_COST 12
|
|
#define JITTER_BUFFER_GET_LATE_COST 13
|
|
|
|
|
|
/** Initialises jitter buffer
|
|
*
|
|
* @param step_size Starting value for the size of concleanment packets and delay
|
|
adjustment steps. Can be changed at any time using JITTER_BUFFER_SET_DELAY_STEP
|
|
and JITTER_BUFFER_GET_CONCEALMENT_SIZE.
|
|
* @return Newly created jitter buffer state
|
|
*/
|
|
JitterBuffer *jitter_buffer_init(int step_size);
|
|
|
|
/** Restores jitter buffer to its original state
|
|
*
|
|
* @param jitter Jitter buffer state
|
|
*/
|
|
void jitter_buffer_reset(JitterBuffer *jitter);
|
|
|
|
/** Destroys jitter buffer
|
|
*
|
|
* @param jitter Jitter buffer state
|
|
*/
|
|
void jitter_buffer_destroy(JitterBuffer *jitter);
|
|
|
|
/** Put one packet into the jitter buffer
|
|
*
|
|
* @param jitter Jitter buffer state
|
|
* @param packet Incoming packet
|
|
*/
|
|
void jitter_buffer_put(JitterBuffer *jitter, const JitterBufferPacket *packet);
|
|
|
|
/** Get one packet from the jitter buffer
|
|
*
|
|
* @param jitter Jitter buffer state
|
|
* @param packet Returned packet
|
|
* @param desired_span Number of samples (or units) we wish to get from the buffer (no guarantee)
|
|
* @param current_timestamp Timestamp for the returned packet
|
|
*/
|
|
int jitter_buffer_get(JitterBuffer *jitter, JitterBufferPacket *packet, spx_int32_t desired_span, spx_int32_t *start_offset);
|
|
|
|
/** Used right after jitter_buffer_get() to obtain another packet that would have the same timestamp.
|
|
* This is mainly useful for media where a single "frame" can be split into several packets.
|
|
*
|
|
* @param jitter Jitter buffer state
|
|
* @param packet Returned packet
|
|
*/
|
|
int jitter_buffer_get_another(JitterBuffer *jitter, JitterBufferPacket *packet);
|
|
|
|
/** Get pointer timestamp of jitter buffer
|
|
*
|
|
* @param jitter Jitter buffer state
|
|
*/
|
|
int jitter_buffer_get_pointer_timestamp(JitterBuffer *jitter);
|
|
|
|
/** Advance by one tick
|
|
*
|
|
* @param jitter Jitter buffer state
|
|
*/
|
|
void jitter_buffer_tick(JitterBuffer *jitter);
|
|
|
|
/** Telling the jitter buffer about the remaining data in the application buffer
|
|
* @param jitter Jitter buffer state
|
|
* @param rem Amount of data buffered by the application (timestamp units)
|
|
*/
|
|
void jitter_buffer_remaining_span(JitterBuffer *jitter, spx_uint32_t rem);
|
|
|
|
/** Used like the ioctl function to control the jitter buffer parameters
|
|
*
|
|
* @param jitter Jitter buffer state
|
|
* @param request ioctl-type request (one of the JITTER_BUFFER_* macros)
|
|
* @param ptr Data exchanged to-from function
|
|
* @return 0 if no error, -1 if request in unknown
|
|
*/
|
|
int jitter_buffer_ctl(JitterBuffer *jitter, int request, void *ptr);
|
|
|
|
int jitter_buffer_update_delay(JitterBuffer *jitter, JitterBufferPacket *packet, spx_int32_t *start_offset);
|
|
|
|
/* @} */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|