The Statistics API provides a function to retrieve all the statistics properties.

Required Header

#include <webrtc.h>

Overview

The WebRTC Statistics API provides a function to get statistics information to monitor the status of the underlying network and pipeline. You can get various properties for each statistics type as below.

WEBRTC_STATS_TYPE_CODEC is for a codec currently being used by RTP streams
WEBRTC_STATS_TYPE_INBOUND_RTP is for RTP stream currently received
WEBRTC_STATS_TYPE_OUTBOUND_RTP is for RTP stream currently sent
WEBRTC_STATS_TYPE_REMOTE_INBOUND_RTP is for the remote peer's inbound RTP stream corresponding to an outbound RTP stream
WEBRTC_STATS_TYPE_REMOTE_OUTBOUND_RTP is for the remote peer's outbound RTP stream corresponding to an inbound RTP stream

Foreach Operations

FOREACH	CALLBACK	DESCRIPTION
webrtc_foreach_stats()	webrtc_stats_cb()	It retrieves all the statistics properties

Functions
int	webrtc_foreach_stats (webrtc_h webrtc, int type_mask, webrtc_stats_cb callback, void *user_data)
	Retrieves all the statistics properties.
Typedefs
typedef bool(*	webrtc_stats_cb )(webrtc_stats_type_e type, const webrtc_stats_prop_info_s prop_info, void user_data)
	Called iteratively to report all the statistics properties.
Defines
#define	WEBRTC_STATS_TYPE_ALL
	Definition for all the supported statistics types mask.
#define	WEBRTC_STATS_COMMON 0x00000100
	Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC stats.
#define	WEBRTC_STATS_CODEC 0x00000200
	Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC codec stats.
#define	WEBRTC_STATS_RTP_STREAM 0x00000400
	Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC RTP stream stats.
#define	WEBRTC_STATS_RECEIVED_RTP_STREAM 0x00000800
	Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC received RTP stream stats.
#define	WEBRTC_STATS_INBOUND_RTP_STREAM 0x00001000
	Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC inbound RTP stream stats.
#define	WEBRTC_STATS_SENT_RTP_STREAM 0x00002000
	Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC sent RTP stream stats.
#define	WEBRTC_STATS_OUTBOUND_RTP_STREAM 0x00004000
	Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC outbound RTP stream stats.
#define	WEBRTC_STATS_REMOTE_INBOUND_RTP_STREAM 0x00008000
	Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC remote inbound RTP stream stats.
#define	WEBRTC_STATS_REMOTE_OUTBOUND_RTP_STREAM 0x00010000
	Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC remote outbound RTP stream stats.

Define Documentation

#define WEBRTC_STATS_CODEC 0x00000200

Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC codec stats.

Since :: 7.0

Remarks:: It corresponds with the values described in https://www.w3.org/TR/webrtc-stats/#dom-rtccodecstats.

See also:: webrtc_stats_prop_e

#define WEBRTC_STATS_COMMON 0x00000100

Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC stats.

Since :: 7.0

Remarks:: It corresponds with the values described in https://www.w3.org/TR/webrtc-stats/#dom-rtcstats.

See also:: webrtc_stats_prop_e

#define WEBRTC_STATS_INBOUND_RTP_STREAM 0x00001000

Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC inbound RTP stream stats.

Since :: 7.0

Remarks:: It corresponds with the values described in https://www.w3.org/TR/webrtc-stats/#dom-rtcinboundrtpstreamstats.

See also:: webrtc_stats_prop_e

#define WEBRTC_STATS_OUTBOUND_RTP_STREAM 0x00004000

Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC outbound RTP stream stats.

Since :: 7.0

Remarks:: It corresponds with the values described in https://www.w3.org/TR/webrtc-stats/#dom-rtcoutboundrtpstreamstats.

See also:: webrtc_stats_prop_e

#define WEBRTC_STATS_RECEIVED_RTP_STREAM 0x00000800

Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC received RTP stream stats.

Since :: 7.0

Remarks:: It corresponds with the values described in https://www.w3.org/TR/webrtc-stats/#dom-rtcreceivedrtpstreamstats.

See also:: webrtc_stats_prop_e

#define WEBRTC_STATS_REMOTE_INBOUND_RTP_STREAM 0x00008000

Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC remote inbound RTP stream stats.

Since :: 7.0

Remarks:: It corresponds with the values described in https://www.w3.org/TR/webrtc-stats/#dom-rtcremoteinboundrtpstreamstats.

See also:: webrtc_stats_prop_e

#define WEBRTC_STATS_REMOTE_OUTBOUND_RTP_STREAM 0x00010000

Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC remote outbound RTP stream stats.

Since :: 7.0

Remarks:: It corresponds with the values described in https://www.w3.org/TR/webrtc-stats/#dom-rtcremoteoutboundrtpstreamstats.

See also:: webrtc_stats_prop_e

#define WEBRTC_STATS_RTP_STREAM 0x00000400

Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC RTP stream stats.

Since :: 7.0

Remarks:: It corresponds with the values described in https://www.w3.org/TR/webrtc-stats/#dom-rtcrtpstreamstats.

See also:: webrtc_stats_prop_e

#define WEBRTC_STATS_SENT_RTP_STREAM 0x00002000

Definition for mask value used by webrtc_stats_prop_e that represents properties of RTC sent RTP stream stats.

Since :: 7.0

Remarks:: It corresponds with the values described in https://www.w3.org/TR/webrtc-stats/#dom-rtcsentrtpstreamstats.

See also:: webrtc_stats_prop_e

#define WEBRTC_STATS_TYPE_ALL

Value:

WEBRTC_STATS_TYPE_CODEC | \
    WEBRTC_STATS_TYPE_INBOUND_RTP | \
    WEBRTC_STATS_TYPE_OUTBOUND_RTP | \
    WEBRTC_STATS_TYPE_REMOTE_INBOUND_RTP | \
    WEBRTC_STATS_TYPE_REMOTE_OUTBOUND_RTP

Definition for all the supported statistics types mask.

Since :: 7.0

See also:: webrtc_foreach_stats()

Typedef Documentation

typedef bool(* webrtc_stats_cb)(webrtc_stats_type_e type, const webrtc_stats_prop_info_s *prop_info, void *user_data)

Called iteratively to report all the statistics properties.

Since :: 7.0

Remarks:: The prop_info can be used only in the callback. To use outside, make a copy.

Parameters:

[in]	type	The statistics type
[in]	prop_info	The statistics property information
[in]	user_data	The user data passed from the callback registration function

Returns:: true to continue with the next iteration of the loop, otherwise false to break out of the loop

See also:: webrtc_foreach_stats()

Example

    bool __stats_cb(webrtc_stats_type_e type, const webrtc_stats_prop_info_s *prop_info, void *user_data)
    {
        switch (prop_info->type) {
        case WEBRTC_STATS_PROP_TYPE_BOOL:
            printf("type[0x%x] prop[%s, 0x%08x, value:%d]\n", type, prop_info->name, prop_info->prop, prop_info->v_bool);
            break;
        case WEBRTC_STATS_PROP_TYPE_INT:
            printf("type[0x%x] prop[%s, 0x%08x, value:%d]\n", type, prop_info->name, prop_info->prop, prop_info->v_int);
            break;
        case WEBRTC_STATS_PROP_TYPE_INT64:
            printf("type[0x%x] prop[%s, 0x%08x, value:%"PRId64"]\n", type, prop_info->name, prop_info->prop, prop_info->v_int64);
            break;
        case WEBRTC_STATS_PROP_TYPE_UINT:
            printf("type[0x%x] prop[%s, 0x%08x, value:%u]\n", type, prop_info->name, prop_info->prop, prop_info->v_uint);
            break;
        case WEBRTC_STATS_PROP_TYPE_UINT64:
            printf("type[0x%x] prop[%s, 0x%08x, value:%"PRIu64"]\n", type, prop_info->name, prop_info->prop, prop_info->v_uint64);
            break;
        case WEBRTC_STATS_PROP_TYPE_FLOAT:
            printf("type[0x%x] prop[%s, 0x%08x, value:%f]\n", type, prop_info->name, prop_info->prop, prop_info->v_float);
            break;
        case WEBRTC_STATS_PROP_TYPE_DOUBLE:
            printf("type[0x%x] prop[%s, 0x%08x, value:%lf]\n", type, prop_info->name, prop_info->prop, prop_info->v_double);
            break;
        case WEBRTC_STATS_PROP_TYPE_STRING:
            printf("type[0x%x] prop[%s, 0x%08x, value:%s]\n", type, prop_info->name, prop_info->prop, prop_info->v_string);
            break;
        }
        return true;
    }

Enumeration Type Documentation

enum webrtc_stats_prop_e

Enumeration for WebRTC statistics property.

Since :: 7.0

Enumerator:

WEBRTC_STATS_PROP_TIMESTAMP	Timestamp
WEBRTC_STATS_PROP_ID	Id
WEBRTC_STATS_PROP_PAYLOAD_TYPE	Payload type
WEBRTC_STATS_PROP_CLOCK_RATE	Clock rate
WEBRTC_STATS_PROP_CHANNELS	Channels
WEBRTC_STATS_PROP_MIME_TYPE	MIME type
WEBRTC_STATS_PROP_CODEC_TYPE	Codec type
WEBRTC_STATS_PROP_SDP_FMTP_LINE	SDP FMTP line
WEBRTC_STATS_PROP_SSRC	SSRC
WEBRTC_STATS_PROP_TRANSPORT_ID	Transport id
WEBRTC_STATS_PROP_CODEC_ID	Codec id
WEBRTC_STATS_PROP_PACKETS_RECEIVED	Packets received
WEBRTC_STATS_PROP_PACKETS_LOST	Packets lost
WEBRTC_STATS_PROP_PACKETS_DISCARDED	Packets discarded
WEBRTC_STATS_PROP_JITTER	Jitter
WEBRTC_STATS_PROP_BYTES_RECEIVED	Bytes received
WEBRTC_STATS_PROP_PACKETS_DUPLICATED	Packets duplicated
WEBRTC_STATS_PROP_BYTES_SENT	Bytes sent
WEBRTC_STATS_PROP_PACKETS_SENT	Packets sent
WEBRTC_STATS_PROP_REMOTE_ID	Remote id
WEBRTC_STATS_PROP_FIR_COUNT	FIR packets
WEBRTC_STATS_PROP_PLI_COUNT	PLI packets
WEBRTC_STATS_PROP_NACK_COUNT	NACK packets
WEBRTC_STATS_PROP_ROUND_TRIP_TIME	Round trip time
WEBRTC_STATS_PROP_FRACTION_LOST	Fraction lost
WEBRTC_STATS_PROP_REMOTE_TIMESTAMP	Remote timestamp
WEBRTC_STATS_PROP_LOCAL_ID	Local id

enum webrtc_stats_prop_type_e

Enumeration for statistics property data type.

Since :: 7.0

Enumerator:

WEBRTC_STATS_PROP_TYPE_BOOL	Boolean type
WEBRTC_STATS_PROP_TYPE_INT	Signed integer type
WEBRTC_STATS_PROP_TYPE_UINT	Unsigned integer type
WEBRTC_STATS_PROP_TYPE_INT64	64-bit signed integer type
WEBRTC_STATS_PROP_TYPE_UINT64	64-bit unsigned integer type
WEBRTC_STATS_PROP_TYPE_FLOAT	Float type
WEBRTC_STATS_PROP_TYPE_DOUBLE	Double type
WEBRTC_STATS_PROP_TYPE_STRING	String type

enum webrtc_stats_type_e

Enumeration for WebRTC statistics type.

Since :: 7.0

Enumerator:

WEBRTC_STATS_TYPE_CODEC	Codec
WEBRTC_STATS_TYPE_INBOUND_RTP	Inbound RTP
WEBRTC_STATS_TYPE_OUTBOUND_RTP	Outbound RTP
WEBRTC_STATS_TYPE_REMOTE_INBOUND_RTP	Remote inbound RTP
WEBRTC_STATS_TYPE_REMOTE_OUTBOUND_RTP	Remote outbound RTP

Function Documentation

int webrtc_foreach_stats	(	webrtc_h	webrtc,
		int	type_mask,
		webrtc_stats_cb	callback,
		void *	user_data
	)

Retrieves all the statistics properties.

Since :: 7.0

Remarks:: The registered callback will be invoked in an internal thread of the webrtc.

Parameters:

[in]	webrtc	WebRTC handle
[in]	type_mask	The mask values of webrtc_stats_type_e combined with bitwise 'or'
[in]	callback	Callback function pointer
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

WEBRTC_ERROR_NONE	Successful
WEBRTC_ERROR_INVALID_PARAMETER	Invalid parameter
WEBRTC_ERROR_INVALID_STATE	Invalid state

Precondition:: webrtc state must be set to WEBRTC_STATE_PLAYING.

Postcondition:: webrtc_stats_cb() will be invoked.

Example

    if (webrtc_foreach_stats(webrtc, WEBRTC_STATS_TYPE_ALL, __stats_cb, user_data) != WEBRTC_ERROR_NONE)
        return error;
    ... or ...
    if (webrtc_foreach_stats(webrtc, WEBRTC_STATS_TYPE_INBOUND_RTP | WEBRTC_STATS_TYPE_REMOTE_OUTBOUND_RTP,
        __stats_cb, user_data) != WEBRTC_ERROR_NONE)
        return error;

Required Header

Overview

Foreach Operations

Functions

Typedefs

Defines

Define Documentation

Typedef Documentation

Enumeration Type Documentation

Function Documentation