AidStream C++ API

C++ API Overview

Structure	Public Member Variable	Type	Description
Image	data	const char *	Pointer to the buffer storing data
	data_mask	const char *	Pointer to the buffer storing mask data (reserved)
	stream_id	string	Unique ID identifying the stream (required, convenient for locating in multi-threaded conditions)
	width	int	Target image width
	height	int	Target image height
	width_padding	int	Target image width padding (only used for 6490 ql)
	height_padding	int	Target image height padding (only used for 6490 ql)
	size	uint64_t	Memory length occupied by image data
	fps	double	Frame rate
	idx	uint64_t	Frame counter
	frame_time	string	Frame timestamp (only used for 6490 ql)

Public Function	Description
void clogger(const char* path_and_prefix)	Create log, set filename and path
void set_log_level(GSTLogLevel log_level)	Set log level
typedef function<int8_t( const Image & )> GetImageCB	Input parameter for the stream start function, used to get image resources. This function is customized by the user. The interface only provides type definitions to standardize the definition of callback functions.
int start_stream(string stream_id, GetImageCB &cb)	Start a stream based on stream id (since stream configuration is complex, it is recommended to configure the stream through a configuration file, this interface is the only recommended interface)
int start_stream_input_file(string file_path, GetImageCB cb, StreamType display_type, string target_path, int width, int height, string stream_id)	Start file stream
int start_stream_input_rtsp(string rtsp_addr, GetImageCB cb, StreamType display_type, string target_path, int width, int height, string stream_id)	Start RTSP stream
int start_stream_input_rtmp(string rtmp_addr, GetImageCB cb, StreamType display_type, string target_path, int width, int height, string stream_id)	Start RTMP stream

ENUM	Public Member Variable	Type	Description
GSTLogLevel	SINFO	uint8_t	Log level SINFO
	SWARNING	uint8_t	Log level SWARNING
	SERROR	uint8_t	Log level SERROR
	SDEBUG	uint8_t	Log level SDEBUG
	SOFF	uint8_t	Log level SOFF
StreamType	EMPTY	uint8_t	Stream protocol type empty
	WAYLANDSINK	uint8_t	Stream protocol type WayLand
	RTSPSINK	uint8_t	Stream protocol type RTSP
	RTMPSINK	uint8_t	Stream protocol type RTMP

Structure Image

Defines image data-related information, including image configuration information and pointer variables.

Member Variable	Type	Default Value	Description
data	const char *		Pointer to the buffer storing data
data_mask	const char *		Pointer to the buffer storing mask data (reserved)
stream_id	string		Unique ID identifying the stream (required, convenient for locating in multi-threaded conditions)
width	int		Image width
height	int		Image height
width_padding	int		Target image width padding (only used for 6490 ql)
height_padding	int		Target image height padding (only used for 6490 ql)
size	uint64_t		Memory length occupied by image data
fps	double		Frame rate
idx	uint64_t		Frame counter
frame_time	string		Frame timestamp (only used for 6490 ql)

Unless otherwise specified, all definitions belong to the namespace AidLux::AidStream. It can be introduced in the code with the following command:

using namespace AidLux::AidStream;

Start Stream Based on Stream ID

API	int start_stream(string stream_id, GetImageCB &cb)
Description	Start a stream. Parameter is stream id. Stream id and corresponding configuration are defined in the file /usr/local/share/aidstream-gst/conf/aidstream-gst.conf. The stream id in this configuration file must be unique. Note: This interface is the only strongly recommended interface
Parameters	stream_id: Identifies a unique stream configuration. cb: Callback function. Regarding callback functions, please refer to Callback Function. For information on how to set up the configuration file, please refer to Reference
Return Value	0: Success, -1: Failure

Example:

// Start a stream identified as stream1
int res = start_stream("stream1", my_cb);

Start File Stream

API	int start_stream_input_file(string file_path, GetImageCB cb, StreamType display_type, string target_path, int width, int height, string stream_id)
Description	Start a file stream. Does not depend on configuration file, directly configure corresponding parameters.
Parameters	file_path: Source MP4 data file. cb: Callback function. display_type: Output stream type. target_path: Output stream target address. Note: width and height are no longer effective
Return Value	0: Success, -1: Failure

Example:

// Start file stream
int res = start_stream_input_file("./test.mp4", my_cb, StreamType::WAYLANDSINK, "rtsp://192.168.111.115:8554/aidstream-gst-test-6");

Start RTSP Stream

API	int start_stream_input_rtsp(string rtsp_addr, GetImageCB cb, StreamType display_type, string target_path, int width, int height, string stream_id)
Description	Start RTSP stream. Does not depend on configuration file, directly configure corresponding parameters.
Parameters	rtsp_addr: Source RTSP address. cb: Callback function. display_type: Output stream type. target_path: Output stream target address. Note: width and height are no longer effective
Return Value	0: Success, -1: Failure

Example:

// Start RTSP stream
int res = start_stream_input_rtsp("rtsp://admin:[email protected]:554/h264/ch1/main/av_stream", my_cb, StreamType::RTSPSINK, "rtsp://192.168.111.115:8554/aidstream-gst-test-3");

Start RTMP Stream

API	int start_stream_input_rtmp(string rtmp_addr, GetImageCB cb, StreamType display_type, string target_path, int width, int height, string stream_id)
Description	Start RTMP stream. Does not depend on configuration file, directly configure corresponding parameters.
Parameters	rtmp_addr: Source RTMP address. cb: Callback function. display_type: Output stream type. target_path: Output stream target address. Note: width and height are no longer effective
Return Value	0: Success, -1: Failure

Example:

// Start RTMP stream
int res = start_stream_input_rtmp("rtmp://admin:[email protected]:554/h264/ch1/main/av_stream", my_cb, StreamType::EMPTY, "rtsp://192.168.111.115:8554/aidstream-gst-test-2");

Create Log, Set Filename and Path (function clogger)

API	void clogger(const char* path_and_prefix)
Description	Create log, set filename and path
Parameters	path_and_prefix: Log filename with path. Example: "./aidclog_aidstream_".
Return Value	None

Example:

// Create log, set filename and path
const char* log_path = "./aidclog_aidstream_";
Aidlux::AidStream::clogger(log_path);

Set Log Level (function set_log_level)

API	void set_log_level(GSTLogLevel log_level)
Description	Set log level.
Parameters	log_level is an enumeration of GSTLogLevel type. For information about GSTLogLevel, please refer to Enum GSTLogLevel
Return Value	None

Example:

// Set log level
Aidlux::AidStream::set_log_level(GSTLogLevel::SINFO);

Log Level (Enum GSTLogLevel)

Member Variable	Type	Default Value	Description
SINFO	uint8_t	0	Log level SINFO
SWARNING	uint8_t		Log level SWARNING
SERROR	uint8_t		Log level SERROR
SDEBUG	uint8_t		Log level SDEBUG
SOFF	uint8_t		Log level SOFF

Stream Type (Enum StreamType Protocol Type)

Member Variable	Type	Default Value	Description
EMPTY	uint8_t	0	Stream protocol type empty
WAYLANDSINK	uint8_t		Stream protocol type Wayland
RTSPSINK	uint8_t		Stream protocol type RTSP
RTMPSINK	uint8_t		Stream protocol type RTMP

Callback Function GetImageCB

API	typedef std::function<int8_t(const Image & )> GetImageCB
Description	Input parameter for the stream start function, used to get image resources. This function is customized by the user. The interface only provides type definitions to standardize the definition of callback functions.
Parameters	The first parameter is an instantiated object of the structure Image, through which data is passed in. Image object includes parameters such as pointers to data buffer, data width and height, frame rate, etc. Please refer to Image for details
Return Value	Custom

Example:

// Callback function definition
int8_t my_get_img_cb(const Image & img)
{
    printf("width: %d, height: %d, fps: %f\n", img.width, img.height, img.fps);
    ......
    return 0;
}