XAppCaptureReadLocalStream
读取由先前对 XAppCaptureRecordTimespan 的调用生成的 .mp4 文件的内容。
语法
HRESULT XAppCaptureReadLocalStream(
XAppCaptureLocalStreamHandle handle,
size_t startPosition,
uint32_t bytesToRead,
uint8_t * buffer,
uint32_t * bytesWritten
)
参数
handle _In_
类型:XAppCaptureLocalStreamHandle
由 XAppCaptureRecordTimespan 之前创建的本地录制文件的句柄。
startPosition _In_
类型:size_t
流中的起始位置。
bytesToRead _In_
类型:uint32_t
要读取的字节数。
buffer _Out_writes_to_(bytesToRead, *bytesWritten)
类型:uint8_t *
要将流数据写入其中的缓冲区。
bytesWritten _Out_
类型:uint32_t *
函数完成时,包含写入到提供的缓冲区的字节数。
返回值
类型:HRESULT
函数结果。
备注
一次最多可以存在两个录制文件。 在关闭流时,将删除该文件。 当游戏退出时,将自动删除录制内容以防止出现过时文件。
请参阅 XAppCaptureRecordTimespan,以了解如何获取 XAppCaptureLocalResult。
const int MAX_DATA = 1024;
XAppCaptureLocalResult localResult = {0};
XAppCaptureLocalStreamHandle localHandle = nullptr;
HANDLE file = INVALID_HANDLE_VALUE;
uint8_t buffer[MAX_DATA];
/* 5 seconds, for example. You should call XAppCaptureGetVideoCaptureSettings() to ensure there's sufficient duration available */
uint64_t durationInMs = 5000;
size_t totalBytesRead = 0;
size_t fileSize = 0;
XAppCaptureRecordTimespan(nullptr, durationInMs, &localResult);
localHandle = localResult.clipHandle;
fileSize = localResult.fileSizeInBytes;
/* T:\ is one example of a writeable local directory. Be aware that the T:\ drive can be invalidated on suspend or resume, and as such it's better to use PLS */
file = CreateFileA("T:\\MyFile.mp4", GENERIC_READ | GENERIC_WRITE, 0, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
while (totalBytesRead < fileSize)
{
uint32_t bytesRead = 0;
uint32_t bytesWritten = 0;
if (SUCCEEDED(XAppCaptureReadLocalStream(localHandle, totalBytesRead, sizeof(buffer), buffer, &bytesRead)))
{
WriteFile(file, buffer, bytesRead, &bytesWritten, NULL);
totalBytesRead += bytesRead;
}
else
{
break;
}
}
/* You must always close a local stream handle even if nothing was read in */
XAppCaptureCloseLocalStream(localHandle);
要求
头文件:XAppCapture.h
库:xgameruntime.lib
支持平台:Windows、Xbox One 系列主机和 Xbox Series 主机