Sun Xiao-Shan SunXiaoShan
SunXiaoShan
/ hello.c
Last active
August 7, 2019 14:48
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| int gx = 1, gy = 2; // global variable | |
| int func(int a ,int b) { | |
| int lx, ly; | |
| gx = a; | |
| gy = b; | |
| lx = 9; | |
| ly = 3; |
SunXiaoShan
/ audio_fuffer_data.c
Created
July 19, 2019 02:11
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| const union | |
| { | |
| uint8 data[ 88370 ]; | |
| uint32 align_me; | |
| } audio_buffer_data_data = | |
| { | |
| 0x52, 0x49, 0x46, 0x46, 0x2A, 0x59, 0x01, 0x00, 0x57, 0x41, 0x56, 0x45, | |
| 0x66, 0x6D, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02, 0x00, | |
| 0x22, 0x56, 0x00, 0x00, 0x88, 0x58, 0x01, 0x00, 0x04, 0x00, 0x10, 0x00, | |
| 0x64, 0x61, 0x74, 0x61, 0xBC, 0x58, 0x01, 0x00, 0xCA, 0x00, 0xCA, 0x00, |
SunXiaoShan
/ AudioToolbox.m
Last active
July 19, 2019 02:03
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| - (void)playBeepAudio { | |
| // Step 1: Dispose & Stop the last queue | |
| if (_queue) { | |
| [self stopAudio]; | |
| [self disposeAudioQueue]; | |
| _queue = nil; | |
| } | |
| // Step 2: Prepare the description of audio buffer | |
| AudioStreamBasicDescription dataformat; |
SunXiaoShan
/ AudioToolbox.m
Created
July 19, 2019 01:44
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| if (_queue) { | |
| AudioFileClose(_audioFile); | |
| [self freeMemory]; | |
| AudioQueueStop(_queue, true); | |
| AudioQueueDispose(_queue, true); | |
| _queue = nil; | |
| } |
SunXiaoShan
/ AudioToolbox.m
Created
July 19, 2019 01:42
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // Step 4: fill the buffer to AudioQueue | |
| status = AudioQueueEnqueueBuffer( | |
| audioQueue, | |
| audioQueueBuffer, | |
| ioNumPackets, | |
| packetDescs | |
| ); | |
| if (status != noErr) NSLog(@"AudioQueueEnqueueBuffer failed %d", status); |
SunXiaoShan
/ AudioToolbox.m
Last active
July 19, 2019 01:41
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // Step 1: load audio data | |
| // If the packetIndex is out of range, the ioNumPackets will be 0 | |
| UInt32 ioNumBytes = outBufferSize; | |
| UInt32 ioNumPackets = numPacketsToRead; | |
| status = AudioFileReadPacketData( | |
| _audioFile, | |
| NO, | |
| &ioNumBytes, | |
| packetDescs, | |
| packetIndex, |
SunXiaoShan
/ AudioToolbox.m
Created
July 19, 2019 01:38
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // Step 6: Allocate buffer | |
| for (int i = 0; i < maxBufferNum; i++) { | |
| // Step 6.1: allock the buffer | |
| status = AudioQueueAllocateBuffer( | |
| _queue, | |
| outBufferSize, | |
| &buffers[i] | |
| ); | |
| if (status != noErr) NSLog(@"AudioQueueAllocateBuffer failed %d", status); |
SunXiaoShan
/ AudioToolbox.m
Created
July 19, 2019 01:37
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // Step 2: Calculate the buffer size | |
| UInt32 size = sizeof(maxPacketSize); | |
| AudioFileGetProperty( | |
| audioFileID, | |
| kAudioFilePropertyPacketSizeUpperBound, | |
| &size, | |
| &maxPacketSize); | |
| if (status != noErr) NSLog(@"kAudioFilePropertyPacketSizeUpperBound failed %d", status); | |
| if (dataFormat.mFramesPerPacket != 0) { |
SunXiaoShan
/ AudioToolbox.m
Created
July 19, 2019 01:36
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| static void BufferCallback(void *inUserData,AudioQueueRef inAQ, | |
| AudioQueueBufferRef buffer) { | |
| AudioPlayerManager *manager = (__bridge AudioPlayerManager *)inUserData; | |
| [manager audioQueueOutputWithQueue:inAQ queueBuffer:buffer]; | |
| } |
SunXiaoShan
/ AudioToolbox.m
Created
July 19, 2019 01:35
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // Step 1: Register callback | |
| // Callback function will fill buffer. Then add to buffer queue. | |
| status = AudioQueueNewOutput( | |
| &dataFormat, | |
| BufferCallback, | |
| (__bridge void * _Nullable)(self), | |
| CFRunLoopGetCurrent(), // nil | |
| kCFRunLoopCommonModes, // nil | |
| 0, | |
| &_queue |