diff --git a/Documentation/DocBook/media/v4l/io.xml b/Documentation/DocBook/media/v4l/io.xml index da654031ef3f..144158b3a5ac 100644 --- a/Documentation/DocBook/media/v4l/io.xml +++ b/Documentation/DocBook/media/v4l/io.xml @@ -699,7 +699,7 @@ linkend="v4l2-buf-type" /> buffer. It depends on the negotiated data format and may change with each buffer for compressed variable size data like JPEG images. Drivers must set this field when type -refers to an input stream, applications when it refers to an output stream. +refers to a capture stream, applications when it refers to an output stream. If the application sets this to 0 for an output stream, then bytesused will be set to the size of the buffer (see the length field of this struct) by @@ -720,14 +720,14 @@ linkend="buffer-flags" />. Indicates the field order of the image in the buffer, see . This field is not used when the buffer contains VBI data. Drivers must set it when -type refers to an input stream, +type refers to a capture stream, applications when it refers to an output stream. struct timeval timestamp - For input streams this is time when the first data + For capture streams this is time when the first data byte was captured, as returned by the clock_gettime() function for the relevant clock id; see V4L2_BUF_FLAG_TIMESTAMP_* in @@ -866,7 +866,7 @@ must set this to 0. The number of bytes occupied by data in the plane (its payload). Drivers must set this field when type - refers to an input stream, applications when it refers to an output stream. + refers to a capture stream, applications when it refers to an output stream. If the application sets this to 0 for an output stream, then bytesused will be set to the size of the plane (see the length field of this struct) @@ -919,7 +919,7 @@ must set this to 0. Offset in bytes to video data in the plane. Drivers must set this field when type - refers to an input stream, applications when it refers to an output stream. + refers to a capture stream, applications when it refers to an output stream. Note that data_offset is included in bytesused. So the size of the image in the plane is bytesused-data_offset at