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Diffstat (limited to 'Documentation/media/uapi/dvb/video-fwrite.rst')
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diff --git a/Documentation/media/uapi/dvb/video-fwrite.rst b/Documentation/media/uapi/dvb/video-fwrite.rst new file mode 100644 index 000000000..045038f41 --- /dev/null +++ b/Documentation/media/uapi/dvb/video-fwrite.rst @@ -0,0 +1,82 @@ +.. -*- coding: utf-8; mode: rst -*- + +.. _video_fwrite: + +================= +dvb video write() +================= + +Name +---- + +dvb video write() + + +Synopsis +-------- + +.. cpp:function:: size_t write(int fd, const void *buf, size_t count) + + +Arguments +--------- + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + + - .. row 1 + + - int fd + + - File descriptor returned by a previous call to open(). + + - .. row 2 + + - void \*buf + + - Pointer to the buffer containing the PES data. + + - .. row 3 + + - size_t count + + - Size of buf. + + +Description +----------- + +This system call can only be used if VIDEO_SOURCE_MEMORY is selected +in the ioctl call VIDEO_SELECT_SOURCE. The data provided shall be in +PES format, unless the capability allows other formats. If O_NONBLOCK +is not specified the function will block until buffer space is +available. The amount of data to be transferred is implied by count. + + +Return Value +------------ + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + + - .. row 1 + + - ``EPERM`` + + - Mode VIDEO_SOURCE_MEMORY not selected. + + - .. row 2 + + - ``ENOMEM`` + + - Attempted to write more data than the internal buffer can hold. + + - .. row 3 + + - ``EBADF`` + + - fd is not a valid open file descriptor. |