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V4L/DVB (8636): v4l2: add v4l2_ctrl_get_name control support function.
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Add function that returns the control name. Allows this to be used in
places where the normal v4l2_ctrl_query_fill() function cannot be
used (e.g. uvc).

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Hans Verkuil authored and Mauro Carvalho Chehab committed Oct 12, 2008
1 parent e6b5da8 commit 69028d7
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Showing 2 changed files with 60 additions and 50 deletions.
109 changes: 59 additions & 50 deletions drivers/media/video/v4l2-common.c
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Original file line number Diff line number Diff line change
Expand Up @@ -362,63 +362,72 @@ const char **v4l2_ctrl_get_menu(u32 id)
}
EXPORT_SYMBOL(v4l2_ctrl_get_menu);

/* Fill in a struct v4l2_queryctrl */
int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def)
/* Return the control name. */
const char *v4l2_ctrl_get_name(u32 id)
{
const char *name;

qctrl->flags = 0;
switch (qctrl->id) {
switch (id) {
/* USER controls */
case V4L2_CID_USER_CLASS: name = "User Controls"; break;
case V4L2_CID_AUDIO_VOLUME: name = "Volume"; break;
case V4L2_CID_AUDIO_MUTE: name = "Mute"; break;
case V4L2_CID_AUDIO_BALANCE: name = "Balance"; break;
case V4L2_CID_AUDIO_BASS: name = "Bass"; break;
case V4L2_CID_AUDIO_TREBLE: name = "Treble"; break;
case V4L2_CID_AUDIO_LOUDNESS: name = "Loudness"; break;
case V4L2_CID_BRIGHTNESS: name = "Brightness"; break;
case V4L2_CID_CONTRAST: name = "Contrast"; break;
case V4L2_CID_SATURATION: name = "Saturation"; break;
case V4L2_CID_HUE: name = "Hue"; break;
case V4L2_CID_USER_CLASS: return "User Controls";
case V4L2_CID_AUDIO_VOLUME: return "Volume";
case V4L2_CID_AUDIO_MUTE: return "Mute";
case V4L2_CID_AUDIO_BALANCE: return "Balance";
case V4L2_CID_AUDIO_BASS: return "Bass";
case V4L2_CID_AUDIO_TREBLE: return "Treble";
case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
case V4L2_CID_BRIGHTNESS: return "Brightness";
case V4L2_CID_CONTRAST: return "Contrast";
case V4L2_CID_SATURATION: return "Saturation";
case V4L2_CID_HUE: return "Hue";

/* MPEG controls */
case V4L2_CID_MPEG_CLASS: name = "MPEG Encoder Controls"; break;
case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: name = "Audio Sampling Frequency"; break;
case V4L2_CID_MPEG_AUDIO_ENCODING: name = "Audio Encoding"; break;
case V4L2_CID_MPEG_AUDIO_L1_BITRATE: name = "Audio Layer I Bitrate"; break;
case V4L2_CID_MPEG_AUDIO_L2_BITRATE: name = "Audio Layer II Bitrate"; break;
case V4L2_CID_MPEG_AUDIO_L3_BITRATE: name = "Audio Layer III Bitrate"; break;
case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: name = "Audio AC-3 Bitrate"; break;
case V4L2_CID_MPEG_AUDIO_MODE: name = "Audio Stereo Mode"; break;
case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: name = "Audio Stereo Mode Extension"; break;
case V4L2_CID_MPEG_AUDIO_EMPHASIS: name = "Audio Emphasis"; break;
case V4L2_CID_MPEG_AUDIO_CRC: name = "Audio CRC"; break;
case V4L2_CID_MPEG_AUDIO_MUTE: name = "Audio Mute"; break;
case V4L2_CID_MPEG_VIDEO_ENCODING: name = "Video Encoding"; break;
case V4L2_CID_MPEG_VIDEO_ASPECT: name = "Video Aspect"; break;
case V4L2_CID_MPEG_VIDEO_B_FRAMES: name = "Video B Frames"; break;
case V4L2_CID_MPEG_VIDEO_GOP_SIZE: name = "Video GOP Size"; break;
case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: name = "Video GOP Closure"; break;
case V4L2_CID_MPEG_VIDEO_PULLDOWN: name = "Video Pulldown"; break;
case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: name = "Video Bitrate Mode"; break;
case V4L2_CID_MPEG_VIDEO_BITRATE: name = "Video Bitrate"; break;
case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: name = "Video Peak Bitrate"; break;
case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: name = "Video Temporal Decimation"; break;
case V4L2_CID_MPEG_VIDEO_MUTE: name = "Video Mute"; break;
case V4L2_CID_MPEG_VIDEO_MUTE_YUV: name = "Video Mute YUV"; break;
case V4L2_CID_MPEG_STREAM_TYPE: name = "Stream Type"; break;
case V4L2_CID_MPEG_STREAM_PID_PMT: name = "Stream PMT Program ID"; break;
case V4L2_CID_MPEG_STREAM_PID_AUDIO: name = "Stream Audio Program ID"; break;
case V4L2_CID_MPEG_STREAM_PID_VIDEO: name = "Stream Video Program ID"; break;
case V4L2_CID_MPEG_STREAM_PID_PCR: name = "Stream PCR Program ID"; break;
case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: name = "Stream PES Audio ID"; break;
case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: name = "Stream PES Video ID"; break;
case V4L2_CID_MPEG_STREAM_VBI_FMT: name = "Stream VBI Format"; break;
case V4L2_CID_MPEG_CLASS: return "MPEG Encoder Controls";
case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";

default:
return -EINVAL;
return NULL;
}
}
EXPORT_SYMBOL(v4l2_ctrl_get_name);

/* Fill in a struct v4l2_queryctrl */
int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def)
{
const char *name = v4l2_ctrl_get_name(qctrl->id);

qctrl->flags = 0;
if (name == NULL)
return -EINVAL;

switch (qctrl->id) {
case V4L2_CID_AUDIO_MUTE:
case V4L2_CID_AUDIO_LOUDNESS:
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1 change: 1 addition & 0 deletions include/media/v4l2-common.h
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Original file line number Diff line number Diff line change
Expand Up @@ -76,6 +76,7 @@ int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local);

int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl,
const char **menu_items);
const char *v4l2_ctrl_get_name(u32 id);
const char **v4l2_ctrl_get_menu(u32 id);
int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, s32 min, s32 max, s32 step, s32 def);
int v4l2_ctrl_query_fill_std(struct v4l2_queryctrl *qctrl);
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