mirror of
https://github.com/edk2-porting/linux-next.git
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84b01c1633
Now, all data structures are commented. A few ioctls remain undocumented: Error: no ID for constraint linkend: VIDEO_GET_SIZE. Error: no ID for constraint linkend: VIDEO_GET_FRAME_RATE. Error: no ID for constraint linkend: VIDEO_GET_PTS. Error: no ID for constraint linkend: VIDEO_GET_FRAME_COUNT. Error: no ID for constraint linkend: VIDEO_COMMAND. Error: no ID for constraint linkend: VIDEO_TRY_COMMAND. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2024 lines
54 KiB
XML
2024 lines
54 KiB
XML
<title>DVB Video Device</title>
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<para>The DVB video device controls the MPEG2 video decoder of the DVB hardware. It
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can be accessed through <emphasis role="tt">/dev/dvb/adapter0/video0</emphasis>. Data types and and
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ioctl definitions can be accessed by including <emphasis role="tt">linux/dvb/video.h</emphasis> in your
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application.
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</para>
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<para>Note that the DVB video device only controls decoding of the MPEG video stream, not
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its presentation on the TV or computer screen. On PCs this is typically handled by an
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associated video4linux device, e.g. <emphasis role="tt">/dev/video</emphasis>, which allows scaling and defining output
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windows.
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</para>
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<para>Some DVB cards don’t have their own MPEG decoder, which results in the omission of
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the audio and video device as well as the video4linux device.
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</para>
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<para>The ioctls that deal with SPUs (sub picture units) and navigation packets are only
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supported on some MPEG decoders made for DVD playback.
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</para>
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<section id="video_types">
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<title>Video Data Types</title>
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<section id="video-format-t">
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<title>video_format_t</title>
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<para>The <emphasis role="tt">video_format_t</emphasis> data type defined by
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</para>
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<programlisting>
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typedef enum {
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VIDEO_FORMAT_4_3, /⋆ Select 4:3 format ⋆/
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VIDEO_FORMAT_16_9, /⋆ Select 16:9 format. ⋆/
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VIDEO_FORMAT_221_1 /⋆ 2.21:1 ⋆/
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} video_format_t;
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</programlisting>
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<para>is used in the VIDEO_SET_FORMAT function (??) to tell the driver which aspect ratio
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the output hardware (e.g. TV) has. It is also used in the data structures video_status
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(??) returned by VIDEO_GET_STATUS (??) and video_event (??) returned by
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VIDEO_GET_EVENT (??) which report about the display format of the current video
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stream.
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</para>
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</section>
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<section id="video-displayformat-t">
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<title>video_displayformat_t</title>
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<para>In case the display format of the video stream and of the display hardware differ the
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application has to specify how to handle the cropping of the picture. This can be done using
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the VIDEO_SET_DISPLAY_FORMAT call (??) which accepts
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</para>
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<programlisting>
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typedef enum {
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VIDEO_PAN_SCAN, /⋆ use pan and scan format ⋆/
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VIDEO_LETTER_BOX, /⋆ use letterbox format ⋆/
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VIDEO_CENTER_CUT_OUT /⋆ use center cut out format ⋆/
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} video_displayformat_t;
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</programlisting>
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<para>as argument.
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</para>
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</section>
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<section id="video-stream-source-t">
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<title>video stream source</title>
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<para>The video stream source is set through the VIDEO_SELECT_SOURCE call and can take
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the following values, depending on whether we are replaying from an internal (demuxer) or
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external (user write) source.
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</para>
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<programlisting>
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typedef enum {
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VIDEO_SOURCE_DEMUX, /⋆ Select the demux as the main source ⋆/
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VIDEO_SOURCE_MEMORY /⋆ If this source is selected, the stream
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comes from the user through the write
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system call ⋆/
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} video_stream_source_t;
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</programlisting>
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<para>VIDEO_SOURCE_DEMUX selects the demultiplexer (fed either by the frontend or the
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DVR device) as the source of the video stream. If VIDEO_SOURCE_MEMORY
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is selected the stream comes from the application through the <emphasis role="tt">write()</emphasis> system
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call.
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</para>
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</section>
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<section id="video-play-state-t">
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<title>video play state</title>
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<para>The following values can be returned by the VIDEO_GET_STATUS call representing the
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state of video playback.
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</para>
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<programlisting>
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typedef enum {
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VIDEO_STOPPED, /⋆ Video is stopped ⋆/
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VIDEO_PLAYING, /⋆ Video is currently playing ⋆/
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VIDEO_FREEZED /⋆ Video is freezed ⋆/
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} video_play_state_t;
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</programlisting>
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</section>
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<section id="video-command">
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<para>The structure must be zeroed before use by the application
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This ensures it can be extended safely in the future.</para>
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<title>struct video-command</title>
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<programlisting>
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struct video_command {
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__u32 cmd;
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__u32 flags;
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union {
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struct {
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__u64 pts;
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} stop;
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struct {
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/⋆ 0 or 1000 specifies normal speed,
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1 specifies forward single stepping,
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-1 specifies backward single stepping,
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>>1: playback at speed/1000 of the normal speed,
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<-1: reverse playback at (-speed/1000) of the normal speed. ⋆/
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__s32 speed;
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__u32 format;
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} play;
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struct {
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__u32 data[16];
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} raw;
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};
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};
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</programlisting>
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</section>
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<section id="video-size-t">
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<title>struct video_size-t</title>
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<programlisting>
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typedef struct {
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int w;
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int h;
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video_format_t aspect_ratio;
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} video_size_t;
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</programlisting>
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</section>
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<section id="video-event">
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<title>struct video_event</title>
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<para>The following is the structure of a video event as it is returned by the VIDEO_GET_EVENT
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call.
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</para>
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<programlisting>
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struct video_event {
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__s32 type;
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#define VIDEO_EVENT_SIZE_CHANGED 1
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#define VIDEO_EVENT_FRAME_RATE_CHANGED 2
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#define VIDEO_EVENT_DECODER_STOPPED 3
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#define VIDEO_EVENT_VSYNC 4
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__kernel_time_t timestamp;
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union {
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video_size_t size;
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unsigned int frame_rate; /⋆ in frames per 1000sec ⋆/
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unsigned char vsync_field; /⋆ unknown/odd/even/progressive ⋆/
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} u;
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};
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</programlisting>
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</section>
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<section id="video-status">
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<title>struct video_status</title>
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<para>The VIDEO_GET_STATUS call returns the following structure informing about various
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states of the playback operation.
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</para>
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<programlisting>
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struct video_status {
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int video_blank; /⋆ blank video on freeze? ⋆/
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video_play_state_t play_state; /⋆ current state of playback ⋆/
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video_stream_source_t stream_source; /⋆ current source (demux/memory) ⋆/
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video_format_t video_format; /⋆ current aspect ratio of stream ⋆/
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video_displayformat_t display_format;/⋆ selected cropping mode ⋆/
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};
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</programlisting>
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<para>If video_blank is set video will be blanked out if the channel is changed or if playback is
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stopped. Otherwise, the last picture will be displayed. play_state indicates if the video is
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currently frozen, stopped, or being played back. The stream_source corresponds to the seleted
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source for the video stream. It can come either from the demultiplexer or from memory.
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The video_format indicates the aspect ratio (one of 4:3 or 16:9) of the currently
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played video stream. Finally, display_format corresponds to the selected cropping
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mode in case the source video format is not the same as the format of the output
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device.
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</para>
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</section>
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<section id="video-still-picture">
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<title>struct video_still_picture</title>
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<para>An I-frame displayed via the VIDEO_STILLPICTURE call is passed on within the
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following structure.
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</para>
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<programlisting>
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/⋆ pointer to and size of a single iframe in memory ⋆/
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struct video_still_picture {
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char ⋆iFrame; /⋆ pointer to a single iframe in memory ⋆/
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int32_t size;
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};
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</programlisting>
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</section>
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<section id="video_caps">
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<title>video capabilities</title>
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<para>A call to VIDEO_GET_CAPABILITIES returns an unsigned integer with the following
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bits set according to the hardwares capabilities.
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</para>
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<programlisting>
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/⋆ bit definitions for capabilities: ⋆/
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/⋆ can the hardware decode MPEG1 and/or MPEG2? ⋆/
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#define VIDEO_CAP_MPEG1 1
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#define VIDEO_CAP_MPEG2 2
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/⋆ can you send a system and/or program stream to video device?
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(you still have to open the video and the audio device but only
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send the stream to the video device) ⋆/
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#define VIDEO_CAP_SYS 4
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#define VIDEO_CAP_PROG 8
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/⋆ can the driver also handle SPU, NAVI and CSS encoded data?
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(CSS API is not present yet) ⋆/
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#define VIDEO_CAP_SPU 16
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#define VIDEO_CAP_NAVI 32
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#define VIDEO_CAP_CSS 64
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</programlisting>
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</section>
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<section id="video-system">
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<title>video system</title>
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<para>A call to VIDEO_SET_SYSTEM sets the desired video system for TV output. The
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following system types can be set:
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</para>
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<programlisting>
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typedef enum {
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VIDEO_SYSTEM_PAL,
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VIDEO_SYSTEM_NTSC,
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VIDEO_SYSTEM_PALN,
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VIDEO_SYSTEM_PALNc,
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VIDEO_SYSTEM_PALM,
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VIDEO_SYSTEM_NTSC60,
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VIDEO_SYSTEM_PAL60,
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VIDEO_SYSTEM_PALM60
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} video_system_t;
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</programlisting>
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</section>
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<section id="video-highlight">
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<title>struct video_highlight</title>
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<para>Calling the ioctl VIDEO_SET_HIGHLIGHTS posts the SPU highlight information. The
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call expects the following format for that information:
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</para>
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<programlisting>
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typedef
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struct video_highlight {
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boolean active; /⋆ 1=show highlight, 0=hide highlight ⋆/
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uint8_t contrast1; /⋆ 7- 4 Pattern pixel contrast ⋆/
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/⋆ 3- 0 Background pixel contrast ⋆/
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uint8_t contrast2; /⋆ 7- 4 Emphasis pixel-2 contrast ⋆/
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/⋆ 3- 0 Emphasis pixel-1 contrast ⋆/
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uint8_t color1; /⋆ 7- 4 Pattern pixel color ⋆/
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/⋆ 3- 0 Background pixel color ⋆/
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uint8_t color2; /⋆ 7- 4 Emphasis pixel-2 color ⋆/
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/⋆ 3- 0 Emphasis pixel-1 color ⋆/
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uint32_t ypos; /⋆ 23-22 auto action mode ⋆/
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/⋆ 21-12 start y ⋆/
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/⋆ 9- 0 end y ⋆/
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uint32_t xpos; /⋆ 23-22 button color number ⋆/
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/⋆ 21-12 start x ⋆/
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/⋆ 9- 0 end x ⋆/
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} video_highlight_t;
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</programlisting>
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</section>
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<section id="video-spu">
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<title>video SPU</title>
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<para>Calling VIDEO_SET_SPU deactivates or activates SPU decoding, according to the
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following format:
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</para>
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<programlisting>
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typedef
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struct video_spu {
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boolean active;
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int stream_id;
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} video_spu_t;
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</programlisting>
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</section>
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<section id="video-spu-palette">
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<title>video SPU palette</title>
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<para>The following structure is used to set the SPU palette by calling VIDEO_SPU_PALETTE:
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</para>
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<programlisting>
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typedef
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struct video_spu_palette{
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int length;
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uint8_t ⋆palette;
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} video_spu_palette_t;
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</programlisting>
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</section>
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<section id="video-navi-pack">
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<title>video NAVI pack</title>
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<para>In order to get the navigational data the following structure has to be passed to the ioctl
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VIDEO_GET_NAVI:
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</para>
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<programlisting>
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typedef
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struct video_navi_pack{
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int length; /⋆ 0 ... 1024 ⋆/
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uint8_t data[1024];
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} video_navi_pack_t;
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</programlisting>
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</section>
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<section id="video-attributes-t">
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<title>video attributes</title>
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<para>The following attributes can be set by a call to VIDEO_SET_ATTRIBUTES:
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</para>
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<programlisting>
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typedef uint16_t video_attributes_t;
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/⋆ bits: descr. ⋆/
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/⋆ 15-14 Video compression mode (0=MPEG-1, 1=MPEG-2) ⋆/
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/⋆ 13-12 TV system (0=525/60, 1=625/50) ⋆/
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/⋆ 11-10 Aspect ratio (0=4:3, 3=16:9) ⋆/
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/⋆ 9- 8 permitted display mode on 4:3 monitor (0=both, 1=only pan-sca ⋆/
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/⋆ 7 line 21-1 data present in GOP (1=yes, 0=no) ⋆/
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/⋆ 6 line 21-2 data present in GOP (1=yes, 0=no) ⋆/
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/⋆ 5- 3 source resolution (0=720x480/576, 1=704x480/576, 2=352x480/57 ⋆/
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/⋆ 2 source letterboxed (1=yes, 0=no) ⋆/
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/⋆ 0 film/camera mode (0=camera, 1=film (625/50 only)) ⋆/
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</programlisting>
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</section></section>
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<section id="video_function_calls">
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<title>Video Function Calls</title>
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<section id="video_fopen">
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<title>open()</title>
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<para>DESCRIPTION
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</para>
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<informaltable><tgroup cols="1"><tbody><row><entry
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align="char">
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<para>This system call opens a named video device (e.g. /dev/dvb/adapter0/video0)
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for subsequent use.</para>
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<para>When an open() call has succeeded, the device will be ready for use.
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The significance of blocking or non-blocking mode is described in the
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documentation for functions where there is a difference. It does not affect the
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semantics of the open() call itself. A device opened in blocking mode can later
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be put into non-blocking mode (and vice versa) using the F_SETFL command
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of the fcntl system call. This is a standard system call, documented in the Linux
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manual page for fcntl. Only one user can open the Video Device in O_RDWR
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mode. All other attempts to open the device in this mode will fail, and an
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error-code will be returned. If the Video Device is opened in O_RDONLY
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mode, the only ioctl call that can be used is VIDEO_GET_STATUS. All other
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call will return an error code.</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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<para>SYNOPSIS
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</para>
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<informaltable><tgroup cols="1"><tbody><row><entry
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align="char">
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<para>int open(const char ⋆deviceName, int flags);</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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<para>PARAMETERS
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</para>
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<informaltable><tgroup cols="2"><tbody><row><entry
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align="char">
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<para>const char
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*deviceName</para>
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</entry><entry
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align="char">
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<para>Name of specific video device.</para>
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</entry>
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</row><row><entry
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align="char">
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<para>int flags</para>
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</entry><entry
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align="char">
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<para>A bit-wise OR of the following flags:</para>
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</entry>
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</row><row><entry
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align="char">
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</entry><entry
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align="char">
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<para>O_RDONLY read-only access</para>
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</entry>
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</row><row><entry
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align="char">
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</entry><entry
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align="char">
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<para>O_RDWR read/write access</para>
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</entry>
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</row><row><entry
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align="char">
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</entry><entry
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align="char">
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<para>O_NONBLOCK open in non-blocking mode</para>
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</entry>
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</row><row><entry
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align="char">
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</entry><entry
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align="char">
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<para>(blocking mode is the default)</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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<para>ERRORS
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</para>
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<informaltable><tgroup cols="2"><tbody><row><entry
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align="char">
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<para>ENODEV</para>
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</entry><entry
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align="char">
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<para>Device driver not loaded/available.</para>
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</entry>
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</row><row><entry
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align="char">
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<para>EINTERNAL</para>
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</entry><entry
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align="char">
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<para>Internal error.</para>
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</entry>
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</row><row><entry
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align="char">
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<para>EBUSY</para>
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</entry><entry
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align="char">
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<para>Device or resource busy.</para>
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</entry>
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</row><row><entry
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align="char">
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<para>EINVAL</para>
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</entry><entry
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align="char">
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<para>Invalid argument.</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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</section>
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<section id="video_fclose">
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<title>close()</title>
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<para>DESCRIPTION
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</para>
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|
<informaltable><tgroup cols="1"><tbody><row><entry
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align="char">
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<para>This system call closes a previously opened video device.</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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<para>SYNOPSIS
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</para>
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<informaltable><tgroup cols="1"><tbody><row><entry
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align="char">
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<para>int close(int fd);</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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<para>PARAMETERS
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</para>
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<informaltable><tgroup cols="2"><tbody><row><entry
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align="char">
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<para>int fd</para>
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</entry><entry
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align="char">
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<para>File descriptor returned by a previous call to open().</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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<para>ERRORS
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</para>
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<informaltable><tgroup cols="2"><tbody><row><entry
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align="char">
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<para>EBADF</para>
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</entry><entry
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align="char">
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<para>fd is not a valid open file descriptor.</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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|
|
</section>
|
|
<section id="video_fwrite">
|
|
<title>write()</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>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.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>size_t write(int fd, const void ⋆buf, size_t count);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>void *buf</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Pointer to the buffer containing the PES data.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>size_t count</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Size of buf.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EPERM</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Mode VIDEO_SOURCE_MEMORY not selected.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>ENOMEM</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Attempted to write more data than the internal buffer can
|
|
hold.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_STOP"
|
|
role="subsection"><title>VIDEO_STOP</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl call asks the Video Device to stop playing the current stream.
|
|
Depending on the input parameter, the screen can be blanked out or displaying
|
|
the last decoded frame.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>int ioctl(fd, int request = VIDEO_STOP, boolean
|
|
mode);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_STOP for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>Boolean mode</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Indicates how the screen shall be handled.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
</entry><entry
|
|
align="char">
|
|
<para>TRUE: Blank screen when stop.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
</entry><entry
|
|
align="char">
|
|
<para>FALSE: Show last decoded frame.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINTERNAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Internal error, possibly in the communication with the
|
|
DVB subsystem.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_PLAY"
|
|
role="subsection"><title>VIDEO_PLAY</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl call asks the Video Device to start playing a video stream from the
|
|
selected source.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>int ioctl(fd, int request = VIDEO_PLAY);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_PLAY for this command.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINTERNAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Internal error, possibly in the communication with the
|
|
DVB subsystem.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_FREEZE"
|
|
role="subsection"><title>VIDEO_FREEZE</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl call suspends the live video stream being played. Decoding
|
|
and playing are frozen. It is then possible to restart the decoding
|
|
and playing process of the video stream using the VIDEO_CONTINUE
|
|
command. If VIDEO_SOURCE_MEMORY is selected in the ioctl call
|
|
VIDEO_SELECT_SOURCE, the DVB subsystem will not decode any more
|
|
data until the ioctl call VIDEO_CONTINUE or VIDEO_PLAY is performed.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>int ioctl(fd, int request = VIDEO_FREEZE);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_FREEZE for this command.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINTERNAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Internal error, possibly in the communication with the
|
|
DVB subsystem.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_CONTINUE"
|
|
role="subsection"><title>VIDEO_CONTINUE</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl call restarts decoding and playing processes of the video stream
|
|
which was played before a call to VIDEO_FREEZE was made.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>int ioctl(fd, int request = VIDEO_CONTINUE);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_CONTINUE for this command.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINTERNAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Internal error, possibly in the communication with the
|
|
DVB subsystem.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_SELECT_SOURCE"
|
|
role="subsection"><title>VIDEO_SELECT_SOURCE</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl call informs the video device which source shall be used for the input
|
|
data. The possible sources are demux or memory. If memory is selected, the
|
|
data is fed to the video device through the write command.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>int ioctl(fd, int request = VIDEO_SELECT_SOURCE,
|
|
video_stream_source_t source);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_SELECT_SOURCE for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>video_stream_source_t
|
|
source</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Indicates which source shall be used for the Video stream.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINTERNAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Internal error, possibly in the communication with the
|
|
DVB subsystem.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_SET_BLANK"
|
|
role="subsection"><title>VIDEO_SET_BLANK</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl call asks the Video Device to blank out the picture.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>int ioctl(fd, int request = VIDEO_SET_BLANK, boolean
|
|
mode);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_SET_BLANK for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>boolean mode</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>TRUE: Blank screen when stop.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
</entry><entry
|
|
align="char">
|
|
<para>FALSE: Show last decoded frame.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINTERNAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Internal error, possibly in the communication with the
|
|
DVB subsystem.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINVAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Illegal input parameter</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_GET_STATUS"
|
|
role="subsection"><title>VIDEO_GET_STATUS</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl call asks the Video Device to return the current status of the device.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para> int ioctl(fd, int request = VIDEO_GET_STATUS, struct
|
|
video_status ⋆status);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_GET_STATUS for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>struct video_status
|
|
*status</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Returns the current status of the Video Device.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINTERNAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Internal error, possibly in the communication with the
|
|
DVB subsystem.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EFAULT</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>status points to invalid address</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_GET_EVENT"
|
|
role="subsection"><title>VIDEO_GET_EVENT</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl call returns an event of type video_event if available. If an event is
|
|
not available, the behavior depends on whether the device is in blocking or
|
|
non-blocking mode. In the latter case, the call fails immediately with errno
|
|
set to EWOULDBLOCK. In the former case, the call blocks until an event
|
|
becomes available. The standard Linux poll() and/or select() system calls can
|
|
be used with the device file descriptor to watch for new events. For select(),
|
|
the file descriptor should be included in the exceptfds argument, and for
|
|
poll(), POLLPRI should be specified as the wake-up condition. Read-only
|
|
permissions are sufficient for this ioctl call.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para> int ioctl(fd, int request = VIDEO_GET_EVENT, struct
|
|
video_event ⋆ev);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_GET_EVENT for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>struct video_event
|
|
*ev</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Points to the location where the event, if any, is to be
|
|
stored.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EFAULT</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>ev points to invalid address</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EWOULDBLOCK</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>There is no event pending, and the device is in
|
|
non-blocking mode.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EOVERFLOW</para>
|
|
</entry><entry
|
|
align="char">
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
</entry><entry
|
|
align="char">
|
|
<para>Overflow in event queue - one or more events were lost.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_SET_DISPLAY_FORMAT"
|
|
role="subsection"><title>VIDEO_SET_DISPLAY_FORMAT</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl call asks the Video Device to select the video format to be applied
|
|
by the MPEG chip on the video.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para> int ioctl(fd, int request =
|
|
VIDEO_SET_DISPLAY_FORMAT, video_display_format_t
|
|
format);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_SET_DISPLAY_FORMAT for this
|
|
command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>video_display_format_t
|
|
format</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Selects the video format to be used.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINTERNAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Internal error.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINVAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Illegal parameter format.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_STILLPICTURE"
|
|
role="subsection"><title>VIDEO_STILLPICTURE</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl call asks the Video Device to display a still picture (I-frame). The
|
|
input data shall contain an I-frame. If the pointer is NULL, then the current
|
|
displayed still picture is blanked.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>int ioctl(fd, int request = VIDEO_STILLPICTURE,
|
|
struct video_still_picture ⋆sp);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_STILLPICTURE for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>struct
|
|
video_still_picture
|
|
*sp</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Pointer to a location where an I-frame and size is stored.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINTERNAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Internal error.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EFAULT</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>sp points to an invalid iframe.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_FAST_FORWARD"
|
|
role="subsection"><title>VIDEO_FAST_FORWARD</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl call asks the Video Device to skip decoding of N number of I-frames.
|
|
This call can only be used if VIDEO_SOURCE_MEMORY is selected.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>int ioctl(fd, int request = VIDEO_FAST_FORWARD, int
|
|
nFrames);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_FAST_FORWARD for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int nFrames</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>The number of frames to skip.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINTERNAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Internal error.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EPERM</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Mode VIDEO_SOURCE_MEMORY not selected.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINVAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Illegal parameter format.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_SLOWMOTION"
|
|
role="subsection"><title>VIDEO_SLOWMOTION</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl call asks the video device to repeat decoding frames N number of
|
|
times. This call can only be used if VIDEO_SOURCE_MEMORY is selected.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>int ioctl(fd, int request = VIDEO_SLOWMOTION, int
|
|
nFrames);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_SLOWMOTION for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int nFrames</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>The number of times to repeat each frame.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINTERNAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Internal error.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EPERM</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Mode VIDEO_SOURCE_MEMORY not selected.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINVAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Illegal parameter format.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_GET_CAPABILITIES"
|
|
role="subsection"><title>VIDEO_GET_CAPABILITIES</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl call asks the video device about its decoding capabilities. On success
|
|
it returns and integer which has bits set according to the defines in section ??.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>int ioctl(fd, int request = VIDEO_GET_CAPABILITIES,
|
|
unsigned int ⋆cap);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_GET_CAPABILITIES for this
|
|
command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>unsigned int *cap</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Pointer to a location where to store the capability
|
|
information.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EFAULT</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>cap points to an invalid iframe.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_SET_ID"
|
|
role="subsection"><title>VIDEO_SET_ID</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl selects which sub-stream is to be decoded if a program or system
|
|
stream is sent to the video device.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>int ioctl(int fd, int request = VIDEO_SET_ID, int
|
|
id);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_SET_ID for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int id</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>video sub-stream id</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINTERNAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Internal error.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINVAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Invalid sub-stream id.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_CLEAR_BUFFER"
|
|
role="subsection"><title>VIDEO_CLEAR_BUFFER</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl call clears all video buffers in the driver and in the decoder hardware.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>int ioctl(fd, int request = VIDEO_CLEAR_BUFFER);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_CLEAR_BUFFER for this command.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_SET_STREAMTYPE"
|
|
role="subsection"><title>VIDEO_SET_STREAMTYPE</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl tells the driver which kind of stream to expect being written to it. If
|
|
this call is not used the default of video PES is used. Some drivers might not
|
|
support this call and always expect PES.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>int ioctl(fd, int request = VIDEO_SET_STREAMTYPE,
|
|
int type);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_SET_STREAMTYPE for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int type</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>stream type</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINVAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>type is not a valid or supported stream type.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_SET_FORMAT"
|
|
role="subsection"><title>VIDEO_SET_FORMAT</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl sets the screen format (aspect ratio) of the connected output device
|
|
(TV) so that the output of the decoder can be adjusted accordingly.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para> int ioctl(fd, int request = VIDEO_SET_FORMAT,
|
|
video_format_t format);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_SET_FORMAT for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>video_format_t
|
|
format</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>video format of TV as defined in section ??.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINVAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>format is not a valid video format.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_SET_SYSTEM"
|
|
role="subsection"><title>VIDEO_SET_SYSTEM</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl sets the television output format. The format (see section ??) may
|
|
vary from the color format of the displayed MPEG stream. If the hardware is
|
|
not able to display the requested format the call will return an error.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para> int ioctl(fd, int request = VIDEO_SET_SYSTEM ,
|
|
video_system_t system);</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_SET_FORMAT for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>video_system_t
|
|
system</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>video system of TV output.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINVAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>system is not a valid or supported video system.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_SET_HIGHLIGHT"
|
|
role="subsection"><title>VIDEO_SET_HIGHLIGHT</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl sets the SPU highlight information for the menu access of a DVD.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para> int ioctl(fd, int request = VIDEO_SET_HIGHLIGHT
|
|
,video_highlight_t ⋆vhilite)</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_SET_HIGHLIGHT for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>video_highlight_t
|
|
*vhilite</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>SPU Highlight information according to section ??.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINVAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>input is not a valid highlight setting.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_SET_SPU"
|
|
role="subsection"><title>VIDEO_SET_SPU</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl activates or deactivates SPU decoding in a DVD input stream. It can
|
|
only be used, if the driver is able to handle a DVD stream.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para> int ioctl(fd, int request = VIDEO_SET_SPU ,
|
|
video_spu_t ⋆spu)</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_SET_SPU for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>video_spu_t *spu</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>SPU decoding (de)activation and subid setting according
|
|
to section ??.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINVAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>input is not a valid spu setting or driver cannot handle
|
|
SPU.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_SET_SPU_PALETTE"
|
|
role="subsection"><title>VIDEO_SET_SPU_PALETTE</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl sets the SPU color palette.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para> int ioctl(fd, int request = VIDEO_SET_SPU_PALETTE
|
|
,video_spu_palette_t ⋆palette )</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_SET_SPU_PALETTE for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>video_spu_palette_t
|
|
*palette</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>SPU palette according to section ??.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINVAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>input is not a valid palette or driver doesn’t handle SPU.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_GET_NAVI"
|
|
role="subsection"><title>VIDEO_GET_NAVI</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl returns navigational information from the DVD stream. This is
|
|
especially needed if an encoded stream has to be decoded by the hardware.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para> int ioctl(fd, int request = VIDEO_GET_NAVI ,
|
|
video_navi_pack_t ⋆navipack)</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_GET_NAVI for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>video_navi_pack_t
|
|
*navipack</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>PCI or DSI pack (private stream 2) according to section
|
|
??.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EFAULT</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>driver is not able to return navigational information</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
|
|
</section><section id="VIDEO_SET_ATTRIBUTES"
|
|
role="subsection"><title>VIDEO_SET_ATTRIBUTES</title>
|
|
<para>DESCRIPTION
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para>This ioctl is intended for DVD playback and allows you to set certain
|
|
information about the stream. Some hardware may not need this information,
|
|
but the call also tells the hardware to prepare for DVD playback.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>SYNOPSIS
|
|
</para>
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
|
align="char">
|
|
<para> int ioctl(fd, int request = VIDEO_SET_ATTRIBUTE
|
|
,video_attributes_t vattr)</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>PARAMETERS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>int fd</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>File descriptor returned by a previous call to open().</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>int request</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>Equals VIDEO_SET_ATTRIBUTE for this command.</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>video_attributes_t
|
|
vattr</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>video attributes according to section ??.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
<para>ERRORS
|
|
</para>
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
|
align="char">
|
|
<para>EBADF</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>fd is not a valid open file descriptor</para>
|
|
</entry>
|
|
</row><row><entry
|
|
align="char">
|
|
<para>EINVAL</para>
|
|
</entry><entry
|
|
align="char">
|
|
<para>input is not a valid attribute setting.</para>
|
|
</entry>
|
|
</row></tbody></tgroup></informaltable>
|
|
</section></section>
|