imemory

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One of Android audio systems: How does audiotrack exchange audio data with audioflinger?

createtrack () through the Binder Mechanism (); Audioflinger registers the audiotrack to mixerthread; Audioflinger creates a trackhandle for control and uses the iaudiotrack interface as the return value of createtrack; Audiotrack uses the iaudiotrack interface to obtain the FIFO (audio_track_cblk_t) created in audioflinger ); Audiotrack creates its own monitoring thread: audiotrackthread; Since then, audiotrack has established all contact work with audioflinger. Next, audiotrack can: Us

Example Analysis: Android. process. Media exits because it calls the crash process.

. There is no leaked cursor information in the log. Cause analysis: When mediaprovider receives an external query request, the process of the other program exits, causing the imemememory binder of the passed cursorwindow to be cleared, therefore, when mediaprovider processes query_transaction, it finds that the memory address of the received imemory object is null, and an exception is thrown to Android. media. exit Process. The code before calling

Oop_day03_ memory management, reference type array

, and each element contains 4 elements for (int i=0;iMemory Graph:code example:Package oo.day03;//Reference type array Demo public class Refarraydemo {public static void main (string[] args) {/*//1.cell[] cells = new Cel L[4];cells[0] = new cell, cells[1] = new cell (2,3), cells[2] = new cell (3,4); cells[3] = new cell (4,5); *//*//2.cell[] CE LLS = new Cell[]{new cell ($), new cell (2,3), new cell (3,4), new cell (4,5)};*//*//3.int[][] arr = new

Audiotrack and audioflinger exchange audio data

Mechanism ();Audioflinger registers the audiotrack to mixerthread;Audioflinger creates a trackhandle for control and uses the iaudiotrack interface as the return value of createtrack;Audiotrack uses the iaudiotrack interface to obtain the FIFO (audio_track_cblk_t) created in audioflinger );Audiotrack creates its own monitoring thread: audiotrackthread;Since then, audiotrack has established all contact work with audioflinger. Next, audiotrack can:Use the iaudiotrack interface to control the stat

Memoryheapbase memory allocation, ashmem_create_region MMAP application shared memory

From: http://blog.csdn.net/zjc0888/article/details/6400624 The header files of several memory-related classes are as follows:Imemory. h: Defines the interface of memory-related classes, indicating the heap memory class imemoryheap and bnmemoryheap, indicating the memory class imemory and bnmemory.Memoryheapbase. h: Defines the class memoryheapbase and inherits and implements bnmemoryheap.Memorybase. h: Defines the class memorybase and inherits and i

Codeforces 432c prime swaps

used operations. Next, print the operations. each operation must be printed"IJ"(1 digit ≤ DigitILatency JLimit ≤ limitN;(JAccept-Encoding-IMemory + Memory 1) is a prime ). If there are multiple answers, you can print any of them. Sample InputInput 33 2 1Output 11 3Input 21 2Output 0Input 44 2 3 1Output 32 41 22 4The sequence with N numbers is ordered by exchange. The principle of exchange is that the number AI and AJ of each exchange (J-I + 1) must b

C-language structural body alignment

example, with #pragma pack (1) in front of the structure, the layout of the memory will change completely.sizeof (A) = 16; sizeof (B) = 32;With #pragma pack (1), the memory will no longer follow principle 1 and Principle 3, which is aligned by 1 bytes. Yes, this is not an ideal world without memory alignment.Memory layout of a B c A: 1111, 11111111, 1111E F g H iMemory layout of B: 11, 1111, 11111111, 11, 1111, 11111111, 1111What about the result of

10. Adapter mode in Javascript design mode -- Adapter

, but my friend didn't give me a data cable (-_-!!! There is no data cable.) How can I take the photo out of the camera? Occasionally, I am a programmer. Fortunately, I know that there is an adapter. For the above situation, I only need to buy a multi-port card reader (¥10.00) in the supermarket next to it ), the problem is completely solved. The card reader mentioned above is actually an adapter used.Adapter Mode Next, I will use the program to simulate the whole process of the adapter to solv

Audio Data Process

trackhandle for control and uses the iaudiotrack interface as the return value of createtrack; Audiotrack uses the iaudiotrack interface to obtain the FIFO (audio_track_cblk_t) created in audioflinger ); Audiotrack creates its own monitoring thread: audiotrackthread; Since then, audiotrack has established all contact work with audioflinger. Next, audiotrack can: Use the iaudiotrack interface to control the status of the audio track, such as start, stop, and pause, implements continuous audio pl

Using MemoryCache in ASP. NET Core 2.0

= MemoryCache; }}About the use of the cache is commonly used is set Get Remove, some people like to encapsulate the code in a separate class library, I think it is not necessary, it can be directly used in our web project directly, and the Imemory provides the extension method is the best packageSet the cache set_cache. Set ("Key", "value");Get Cache getvar result = _cache. Getorcreate ("MyKey", (entry) =>{ entry. Absoluteexpirationrelativetono

Write function size question in Audiotrack

Write function size question in Audiotrack When I saw the audio of the Audiotrack::write function when I looked at the relevant part of "Understanding Android" recently, I had some questions about the size of the operation. The complete code for the function is as follows: ssize_t audiotrack::write (const void* buffer, size_t usersize) { if (msharedbuffer!= 0) return invalid_operation; if (mistimed) return invalid_operation; if (ssize_t (Usersize) Sanity-check:user is most-likely passin

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