Ring Buffer Api

About the SharedMemory library. Recent CPU information via sys. asyncUploadBufferSize. It is never easy to find the o ring bag, and we recognize it. a thread-safe circular buffer (ring buffer) in Go, implemented io. The sys_ringbuffer_remove_multiple() can be used to remove (read) several elements at once. Buffer & Barrier fluid Supply Buffer/barrier fluid can be stored, monitored and delivered using many methods. 8 bar (40 PSI). A Ring Buffer Consumer Before a ring buffer can be used, it must be created. Learn more about using Apple's beta software. A piece of memory for constant buffer values will be allocated from the constant buffer pool in a ring buffer fashion. The buffer size is specified at creation time and cannot be changed afterwards. Availability groups ring buffer types. The idea is to keep the ring buffer primed with data so the uploading step can use the entire timeslice. Further, there. RuntimeException. For example, applying the pattern to your system is not as simple as replacing all your queues with the magic ring buffer. If it is empty, does nothing and returns a negative value. Plan 52 uses an. Any errors in SQL Server are put into this generic ring buffer. -B Set capture buffer size (in MiB, default is 2 MiB). "Magic happens here" - You do your DSP in the frequency domain // c. The graph shows the performance (transactions per second) of several Queue and Ring buffer implementations when exercised by two threads. WebGLProgram; WebGLShader; WebGLState. RuntimeException. The buffer's position is then set to n+1 and its limit is set to its capacity. A ring buffer is pre-allocated memory that, once filled, is over-written from the beginning in a circular ring-like fashion. Note: The head is the index of the first data point, and the tail by definition is the index of the last data point plus 1 (i. The API docs for this last method are somewhat vague on exactly where the buffer will be allocated, stating only that "the Java virtual machine will make a best effort to perform native I/O operations directly upon it," and that they "may reside outside of the normal garbage-collected heap. To demonstrate ring exhaustion in my lab, I had to get a bit creative. When the buffer fills up (i. Note you can also edit the grub during boot, and append the log_buf_len=4M at the end of the line starting with the kernel. This function initializes a circular ring buffer which can hold up to size entries of arbitrary type. The key attribute of a ringbuffer is that it can be safely accessed by two threads simultaneously -- one reading from the buffer and the other writing to it -- without using any synchronization or mutual exclusion primitives. The Rx Ring #1 / Small Rx Buffers are used for non-jumbo frames. The easiest target for extended event data is the Ring Buffer target. Default is 1. Replace the N items in the ring buffer with N random values between -0. The type of the items in the buffer is irrelevant to this functionality. When the guest takes a buffer off the ring to give to the guest network stack, it may not always be immediately returned back to the driver. All the items in the buffer are initialized to zero. Any errors in SQL Server are put into this generic ring buffer. This definitely saves us a lot of trouble of jumping through hoops to find out the corresponding meaning of a State number reported. There is a list of API breaks between QGIS 2 and QGIS 3 at: So in my multi_ring_buffer_dialog. Download Ring buffer API for free. py that implements the following API: Since the ring buffer has a known maximum capacity, we implement it as a list (buff) of floats of that length, with the number of elements in the buffer stored in size. A variety of oilfield products and services, offered by WOODCO USA. Returns: the number of slots that the ring buffer was configured with. This site uses cookies to store information on your computer. Developer Reference. -B Set capture buffer size (in MiB, default is 2 MiB). Notice that the buffer is sent to the net as is, without any manipulation. The study area is created with a simple ring buffer with a radius. Zero to very low process emissions. At the bottom of the personality settings there is a choice of API Mode: Low Level or High Level (selecting Low Level allows to configure interrupt sources). The user application should not directly modify the BD fields. Updating A Plugin From QGIS 2 to QGIS 3. Think of Ringbuffer as a circular array with fixed capacity. For example, I want a circle buffer of 50ft, 100ft, 150ft, etc. Like a cache, a buffer is a "midpoint holding place" but exists not so much to accelerate the speed of an activity as to support the coordination of separate activities. RingBufferLockMode. Parameters: newSize - The new size of the ring buffer. Purpose of a low-overhead ring-buffer in a virtualization system 2. GuitarStringQueue(double[] init) GuitarStringArrayList(double[] init) Constructs a guitar string and initializes the contents of the ring buffer to the values in the given array. This represents the maximum size an item/data can have if it was currently sent to the ring buffer. C_Programming) submitted 5 years ago by Shirohige What I already have: I programmed a linux device driver in c, using the 2. Each ringbuffer is identified by a 'cookie'. thetaStart — Starting angle. The Data Plane Development Kit includes memory, buffer and queue managers, along with a flow classification engine and a set of poll mode drivers. This function initializes a circular ring buffer which can hold up to size entries of arbitrary type. Since buffers are created to. If that happens, having spare buffers to fill the ring means you can go longer without dropping packets. The data structure is extremely simple: a bounded FIFO. If the pool is full (i. When the buffer is filled, new data is written starting at the beginning of the buffer and overwriting the old. A ring buffer still uses an array, but its has two indices, i. > With a shared ring buffer, we could eliminate the need to have shared locking between the application and the kernel, getting away with some clever use of memory ordering and barriers instead. A ring buffer can buffer events from all instances. Items can be added at the back and removed from the front. It is an array that has a pointer to next available slot. This structure lends itself easily to buffering data streams. Count - Gets the number of currently used elements. Develop an API for a ring buffer and an implementation that uses an array representation (with circular wrap-around). Replace the N items in the ring buffer with N random values between -0. When the buffer is empty, the consumer waits until data is deposited; when the buffer is full, the producer waits to deposit data. This may be useful to. If the ring buffer is nonempty, removes and returns its first item. Module for declaring System Ring buffer API. than or equal to 0, or if the resulting size of the ring buffer would be less than 2, your method should throw an IllegalArgumentException. ; The audio streaming data can be filled through a shared buffer (Method 1) or through a callback function (Method 2). Circular Buffer, Cyclic Buffer or Ring Buffer is a data structure that effectively manages a queue of some items. When head == tail, the buffer is empty. Starting from SQL Server 2008, the login failed messages have the reasons for the login failure printed in the SQL Errorlog. Circular buffers (also known as ring buffers) are fixed-size buffers that work as if the memory is contiguous & circular in nature. LIQUID OR GAS BUFFER DIFFERENTIATION Liquid Buffer (API Plan 52) Figure 2 - API Plan 52 Schematic Most are familiar with the terminology associated with contacting liquid buffer fluid systems, more specifically the description of an API Plan 52 support system. Intel NICs tend to cap at this amount. Ring buffers are useful for transferring data between asynchronous processes and for storing log files. Hi All, I did an analysis of the use of API Lock in the develop branch. Accordingly, it may be wise to run a script before starting the application, to unset LBM_DEBUG_MASK and LBM_DEBUG_FILENAME, and set LBM_DEBUG_RING_BUFFER. API Version. Question 2: Why is it API concern if an operator wants to have a 2-1/16” outlet after the buffer tank to go to strip tank, etc? Reply 2: Unfortunately, the question you have asked is not in a format that is acceptable for developing a response. Download Ring buffer API for free. default) settings, these messages will most likely also show up in the kern. RingBuffer used in USB Component with Extra Events. ACCU organises a yearly conference and publishes two journals. The Rx Ring #1 / Small Rx Buffers are used for non-jumbo frames. outerRadius = CFloat(1) a float. like example in API DMA_activatePingPongMode, if i provide the ring buffer address somewhere from midle of the buffer say 10th index for primary descriptor and 25th index for. The SharedMemory class library provides a set of C# classes that utilise memory-mapped files for fast low-level inter-process communication (IPC) - specifically for sharing data between processes. If parameter tx_buffer_size is set to zero: This function will not return until all the data have been sent out, or at least pushed into TX FIFO. Can anyone help? I'm new to this and am trying to figure it out myself. This isn't a comprehensive guide to using protocol buffers in Python. EEVblog Electronics Community Forum. GAME DEVELOPER CONFERENCE | MARCH 15, 2016 Data pipelined through API at frame building time Data ring buffer. This function initializes a circular ring buffer which can hold up to size entries of arbitrary type. rb - Buffer to attempt to remove from. The SndDoCommand() callback then reads the input data from the ring buffer and passes it to the PortAudio callback which generates the output data. max-buffer-size defaults to 1 megabyte. For some reason your suggested change could not be submitted. I want to know if it is now possible to create a custom CPU to GPU ringbuffer to efficiently send commands to a kernel from the host without going though the CUDA API and it's associated overheads and latencies. The bytes buffer ring_buffer_bytes. thetaStart — Starting angle. The Ring Buffer class allows you to easily create circular ring buffers using the variant data type. Now, it is up to the C code to take care of buffer allocation/deallocation, buffer overflow, and the like. Default is 1. Intel NICs tend to cap at this amount. I wanted to share some notes about how to write a circular queue/ring buffer designed for a single producer thread and a single consumer thread (SPSC). Please try again in a few minutes. Download Citation on ResearchGate | A wait-free multi-producer multi-consumer ring buffer | The ring buffer is a staple data structure used in many algorithms and applications. R/ring_buffer_bytes. \$\begingroup\$ Your circular buffer isn't actually a circular buffer, it's a bounded-in size queue. Ring Buffer¶ Ringbuffer is designed in addition to use as a data buffer, also used to connect Audio Elements. void: setGenerateRings(boolean generateRings) Indicates if ring buffers (hollow) are created instead of disk buffers (filled). Simplify the ring buffer handling with the in-place API. Modifications to the BD fields should always go through the specific API functions. A variety of oilfield products and services, offered by WOODCO USA. The template mechanism allows us to efficiently define a ring buffer with a specific size. Typically you want more. The Clo j ure Toolbox. No process contamination is allowed. Note When using the RX ring buffer, one byte is reserved for internal use. * * A ring buffer is a space-efficient, locality-friendly implementation of a * FIFO queue. Storing into the buffer advances the head. Arbitrary many ringbuffers may be initialized via this function. The SharedMemory class library provides a set of C# classes that utilise memory-mapped files for fast low-level inter-process communication (IPC) - specifically for sharing data between processes. You can use two index numbers in the same manner. The SharedMemory class library provides a set of C# classes that utilise a non-persisted memory-mapped file for very fast low-level inter-process communication (IPC) to share data using the following data structures: buffer, array and circular buffer (also known as a ring buffer). Developer Reference. Return (-1) Parameter error. dm_os_ring_buffers) for various security - 315467. log logfile. This governs the maximum amount of data (including metadata values) the ring buffer can hold. The standard API provides support for two of the most basic string operations: substring extraction and string concatenation. This * functionality and implementation is similar to the ArrayBlockingQueue class, * but I thought that I'd implement my own version to get a better feel for how * it works. ring_clear method will wipe out the ring buffer associated with a specific shell session. Can be omitted if a pre-allocated buffer is passed. The following routines are supported: sys_ringbuffer_insert(), sys_ringbuffer_remove() to operate with single element. What is quasardb? 1. This information is updated every 1 minute. First published on MSDN on Mar 24, 2008 SQL Server 2005 SP2 added new ring buffer entries (sys. The reason the ring buffer entries were added was to provide the DBA with more details as to why a client is receiving a failed login or other such. ] Buffer overruns CAS and LL/SC A Glimpse into PC Development Philosophy CAS. The concept of memory ring buffer divided in a set of fragments is borrowed from the ALSA PCM API. Recent CPU information via sys. Submission failed. The buffer liquid shall be maintained at a pressure less than seal chamber pressure and less than 2. Field specifying distance to buffer on. If one or many points are input as a study area, the method will create a 1-mile ring buffer around the point to collect and append enrichment data. Log trace messages to an auto-generated ring buffer while associating them with the originating user action. ROUND — The ends of the buffer will be round, in the shape of a half circle. The ring buffer has a read position and a write position which marks the next position to read from and write to the ring buffer. A variety of oilfield products and services, offered by WOODCO USA. When the buffer is filled, new data is written starting at the beginning of the buffer and overwriting the old. Linux graphics course. The ring buffer will always leave one element unoccupied, so the maximum number of elements it can store will be size - 1. Apply the Karplus-Strong update: delete the sample at the front of the ring buffer and add to the end of the ring buffer the average of the first two samples, multiplied by the energy decay factor. Unpressurized buffer fluid circulation through reservoir. Note that if you pass a read-only buffer object, you still get a writable RingBuffer; it is your responsibility not to write there if the original. asyncUploadBufferSize. Beside of the OnItemPut() and OnItemGet() events, I added an extra OnClear() event which gets called when the ring buffer Clear() method gets called. A ring buffer is a special kind of buffer that is always a constant size, removing the oldest messages when new messages come in. Replace the N items in the ring buffer with N random values between -0. If you explicitly define your buffer before hand then you can use avr-size to check your SRAM usage. A circular buffer, circular queue, cyclic buffer or ring buffer is a data structure that uses a single, fixed-size buffer as if it were connected end-to-end. Example: -b filesize:1000 -b files:5 results in a ring buffer of five files of size one megabyte each. if your syslog has some sane (e. , 64, 128, 256, 512, 1024, 2048, or 4096). Either you augment the buffer size of your cmd. Background. MX 7 SoC which is the core of the Colibri iMX7 module implements a heterogeneous asymmetric architecture. Detailed description of security_error_ring_buffer_recorded properties Local properties (11) of security_error_ring_buffer_recorded class ActivityId property. About the SharedMemory library. Description. How do we implement a ring-buffer? 5. Can anyone help? I'm new to this and am trying to figure it out myself. When head == tail, the buffer is empty. Its API also had a slight flaw such that if the consumer retrieved the data (via Pop rather than just viewing the first element), the producer was free to put new data into the buffer, overwriting the data just retrieved. Replace the N items in the ring buffer with N random values between -0. I am struggling with figuring out if my code is working. High vapor pressure fluids, light hydrocarbons. The purpose is to reduce overheating of creating new objects and aligning all events in some neighbouring fragments of memory, help Disruptor travel faster and eliminate memory false sharing. The Buffer API is rate limited to 60 authenticated requests per user per minute. Like a cache, a buffer is a "midpoint holding place" but exists not so much to accelerate the speed of an activity as to support the coordination of separate activities. For example: Why it works?. Forward to find-file with Ivy completion. If you make more than 60 requests within a 60 seconds window period, you will receive a HTTP code 429 response. I have defined my struct like this: typedef struct { int8_t* buffer; int8_t*. The ZentriOS API is contained entirely within the ZentriOS_SDK/api directory and is split into functional groups. This method does not modify readerIndex or writerIndex of this buffer. Field specifying distance to buffer on. Using a separate thread for writing, separate from some main application thread, implies that there is some way to hand off the data which needs to be written from the application thread to the writing thread. To be used in favor of the studyAreaOptions property in the Infographic class. To review the use of header files, and data structures defined by an API. Learn how to use RingCentral’s APIs to send text messages, make voice calls, send faxes programmatically, and more with our extensive documentation, API reference, and interactive examples. Example: -b filesize:1000 -b files:5 results in a ring buffer of five files of size one megabyte each. ” “People want to move to next-generation infrastructures,” said 29West President and Founder Mark Mahowald. I want to know if it is now possible to create a custom CPU to GPU ringbuffer to efficiently send commands to a kernel from the host without going though the CUDA API and it's associated overheads and latencies. If the buffer is full, an Exception will be thrown. A string buffer is like a String, but can be modified. At first the program for FM Quadraphonic Encoder written in C (console application) and it worked fine. Availability groups ring buffer types. R/ring_buffer_bytes. Think of Ringbuffer as a circular array with fixed capacity. Download Citation on ResearchGate | A wait-free multi-producer multi-consumer ring buffer | The ring buffer is a staple data structure used in many algorithms and applications. Hazelcast Ringbuffer is a new data-structure added to Hazelcast 3. ] Buffer overruns [Lit. I have defined my struct like this: typedef struct { int8_t* buffer; int8_t*. Think of Ringbuffer as a circular array with fixed capacity. The rb_ioctl takes an integer argument giving the operation, as follows: Argument value: 0 - return the size of the ring buffer. If you want to know about PF_RING™ internals or for the User's Manual visit the Documentation section. A shared memory ring buffer is one implementation that satisfies the requirement to stream a continuous utterance to AVS that includes 500 milliseconds of pre-roll, the wake word, and the user's request for cloud-based wake word verification. can): API calls to vkCmd…() between Begin & End •Ring-buffer: One Command-Pool per Frame •when that thread/frame is no longer in flight (Using Fences). Please note, that this is only reasonable if lock mode is on (set to cvb. I build on this buffer of integers and construct a buffer which can hold strings. It seems the major mistake in the HAL for UART receive is that there is no ordinary ring buffer where, for reading UART, there are head and tail pointers and an ever-present read enabled, filling the ring buffer. The completion data can be easily retrieved from the ring buffer without the need of consulting the kernel. :) Notations. Elixir Cross Referencer. Anatomy of a Ring Buffer. ReaderWriter interface - smallnest/ringbuffer. When the write position reaches the end of the array, the write position is set back to 0. This governs the maximum amount of data (including metadata values) the ring buffer can hold. thetaStart — Starting angle. The Web Audio API is rather intimidating at first glance if you’re not used to dealing with the low-level vagaries of audio – you feed in an appropriate file to the right OS API, it gets converted to PCM via magic, cat sounds come out of the speakers, right?. At this point, you’ve explored the API used to insert log messages into the kernel ring buffer. Table of Contents 1. There are four availability groups ring buffers in sys. The ring buffer is a circular software queue. This is what is known as buffer or ring exhaustion. Linux graphics course. Summary and future work In this presentation… [1] To talk about new tracing buffer [2] To share problems of our implementation. TDS errors, memory errors etc. IVRing VS general methods 4. [Commit-gnuradio] [gnuradio] 57/148: Removed the ring buffer from the us. The ring buffer functionality is typically not included in binary distributions of PortAudio, therefore most Python wrappers don’t include it, either. a thread-safe circular buffer (ring buffer) in Go, implemented io. For some reason your suggested change could not be submitted. I am trying to get into C stuff, and I thought it would be a good idea to try and implement a circular buffer. Similar to the Linux New API (NAPI) drivers, it is the DPDK poll mode that performs the all-important interrupt mitigation that, as we know from SR-IOV, is critical to increasing the overall. API 105 manages access to ring buffer 101. Purpose is receiving bytes from uart, which is driven by interrupt , then store byte into ring buffer and then read bytes and working with that. The Ring Bit Buffer must be full, before the failure rate can be calculated. A shared memory ring buffer is one implementation that satisfies the requirement to stream a continuous utterance to AVS that includes 500 milliseconds of pre-roll, the wake word, and the user's request for cloud-based wake word verification. than or equal to 0, or if the resulting size of the ring buffer would be less than 2, your method should throw an IllegalArgumentException. io Find an R package R language docs Run R in your browser R Notebooks. Hazelcast Ringbuffer is a new data-structure added to Hazelcast 3. void: setPolygonBufferType(int rhs1) Indicates how to buffer. dm_os_ring_buffers. DirectX 10 Performance and DirectX 11 Preview. buffer (buffer) - optional pre-allocated buffer to use with RingBuffer. * * A ring buffer is a space-efficient, locality-friendly implementation of a * FIFO queue. Such an approach is intended to reduce the overhead of packet receiving. A variety of oilfield products and services, offered by WOODCO USA. If you are not happy with the use of these cookies, please review our Cookie Policy to learn how they can be disabled. As the camera records video to the stream, the class captures the meta-data associated with each frame (in the form of a PiVideoFrame tuple), discarding meta-data for frames which are no longer fully stored within the underlying ring buffer. The completion data can be easily retrieved from the ring buffer without the need of consulting the kernel. David Tse moved Vulkan dynamic uniform ring buffer from In-Progress to Finished Pre-Alpha 7 David Tse added Vulkan dynamic uniform ring buffer to In-Progress Board Lastworld Development. Namespaces. ] Buffer overruns [Lit. This implementation differs from the RingBufferArray in one point: If setBufferSize(int asize) decreases the size of the buffer and it will get smaller than the actual amount of elements stored, they will get lost. Default is 1. LIQUID OR GAS BUFFER DIFFERENTIATION Liquid Buffer (API Plan 52) Figure 2 - API Plan 52 Schematic Most are familiar with the terminology associated with contacting liquid buffer fluid systems, more specifically the description of an API Plan 52 support system. PyMOL Command Reference. There’s always a 1 byte gap, which means the maximum number of bytes to buffer can never same as the buffer size. A buffer overflow occurs when a program or process attempts to write more data to a fixed length block of memory, or buffer, than the buffer is allocated to hold. One step up from plain arrays, but still, it’s very basic stuff. LIQUIDVR™ TODAY AND TOMORROW. This allows the user to process input data and output the result using a single callback function. API; On This Page. Statically define and initialize a high performance ring buffer. It's an a data structure that facilitate readers / consumers and writers / producers to exchange information asynchronously. The DMV sys. Open valves to flood the pump. Find helpful customer reviews and review ratings for API Buffer Max Marine, 7. Each Element that requests data from the Ringbuffer will block the task until the data is available. Arbitrary many ringbuffers may be initialized via this function. Now, let's look at the method used to migrate data from the kernel into the host. Ring buffers are used in situations when losing events is not fatal, and other forms of queue management have bigger problems. Arbitrary many ringbuffers may be initialized via this function. The Rx Ring #1 / Small Rx Buffers are used for non-jumbo frames. For example, if the size of the Ring Buffer is 10, then at least 10 calls must evaluated, before the failure rate can be calculated. Also see the definition of the configMESSAGE_BUFFER_LENGTH_TYPE configuration parameter. /var/log/dmesg stores the content of the 'kernel ring buffer', a memory buffer created by the kernel at boot in which to store log data it generates as soon as you get past the bootloader phase. Ring buffers exhibit continuity of existence for the full/empty sections ONLY in the SPSC or single threaded case. Here is a fixed version of the code:. By continuing to use our site, you consent to our cookies. One step up from plain arrays, but still, it's very basic stuff. * An implementation of a synchronized queue backed by a ring buffer. The Standard O-Ring Loaded U-Cup profile is square in cross section and it is suitable for both rod and piston applications. Purpose is receiving bytes from uart, which is driven by interrupt , then store byte into ring buffer and then read bytes and working with that. Default is 8. If you are thinking that this is a lot like a 2-element circular buffer, you are entirely correct. G16C02 This specification establishes the minimum requirements for the design and manufacture of the following types of new equipment: a) articulated choke and kill lines; b) choke and kill manifold buffer chamber;. What’s the big deal? DirectX 12 introduces the next version of Direct3D, the graphics API at the heart of DirectX. Further, there. Within the ring, the driver maintains four groups of BDs. The ring buffer's first-in first-out data structure is useful tool for transmitting data between asynchronous processes. Bounded queues built on ring buffers must detect queue full/empty states and track head/tail positions. Open valves to flood the pump. A Lab Example. Records state transitions that have taken place or are taking place. Get the number of samples queued in the audio device. Standard API Methods Reference. A string buffer is like a String, but can be modified. Circular buffer literally means wrap. I had started my ring buffer library as a simple character (one byte) FIFO - first in, first out. There are two fundamental operations associated with an async interface: the act of submitting a request, and the event that is associated with the. The ring buffer functionality is typically not included in binary distributions of PortAudio, therefore most Python wrappers don't include it, either. SQL itself uses this ring buffer internally for errors, so this is most likely to always contain some information. The API version MUST match the version of ZentriOS running on your hardware since ZentriOS Apps are compiled to work with a particular version of ZentriOS. System component results from sp_server_diagnostics. To be used in favor of the studyAreaOptions property in the Infographic class. Ring buffer. You want a large enough ring buffer so that each render thread timeslice can be fully utilized. This * functionality and implementation is similar to the ArrayBlockingQueue class, * but I thought that I'd implement my own version to get a better feel for how * it works. Namespaces. This gets a little mentally complicated but a drawing of what you want will help immensely. Dual Un-pressurized Seals (Tandem) rely on a buffer fluid at or near atmospheric pressure to lubricate the atmospheric side seal. Do not start the pump dry. pcap_sendpacket() takes as arguments a buffer containing the data to send, the length of the buffer and the adapter that will send it. I want to know if it is now possible to create a custom CPU to GPU ringbuffer to efficiently send commands to a kernel from the host without going though the CUDA API and it's associated overheads and latencies. The table below describes the ring buffer types and a sample of the content of the Record column for each ring buffer type. At the bottom of the personality settings there is a choice of API Mode: Low Level or High Level (selecting Low Level allows to configure interrupt sources). However, only sizes in bytes can be specified. , with capture filters) or speed up Wireshark (making it do less work). Parameters: newSize - The new size of the ring buffer. Default system_health XE shows security_error_ring_buffer_recorded ImpersonateSecurityContext – Learn more on the SQLServerCentral forums. 2 on a 133 MHz/64MB Pentium board with Kernel 2. G GstAppSink GstAppSinkCallbacks GstAppSrc GstAppSrcCallbacks GstAppStreamType GstAudioChannelPosition GstAudioClock GstAudioClockGetTimeFunc GstAudioFieldFlag.