diff options
| -rw-r--r-- | drivers/media/video/v4l2-common.c | 507 | ||||
| -rw-r--r-- | include/media/v4l2-common.h | 13 |
2 files changed, 519 insertions, 1 deletions
diff --git a/drivers/media/video/v4l2-common.c b/drivers/media/video/v4l2-common.c index 2b2c0b3a16ad..14e523471354 100644 --- a/drivers/media/video/v4l2-common.c +++ b/drivers/media/video/v4l2-common.c @@ -294,7 +294,10 @@ static const char *v4l2_ioctls[] = { #if 1 [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP", #endif - [_IOC_NR(VIDIOC_LOG_STATUS)] = "VIDIOC_LOG_STATUS" + [_IOC_NR(VIDIOC_LOG_STATUS)] = "VIDIOC_LOG_STATUS", + [_IOC_NR(VIDIOC_G_EXT_CTRLS)] = "VIDIOC_G_EXT_CTRLS", + [_IOC_NR(VIDIOC_S_EXT_CTRLS)] = "VIDIOC_S_EXT_CTRLS", + [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)] = "VIDIOC_TRY_EXT_CTRLS" }; #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) @@ -511,6 +514,23 @@ void v4l_printk_ioctl_arg(char *s,unsigned int cmd, void *arg) printk ("%s: id=%d, value=%d\n", s, p->id, p->value); break; } + case VIDIOC_G_EXT_CTRLS: + case VIDIOC_S_EXT_CTRLS: + case VIDIOC_TRY_EXT_CTRLS: + { + struct v4l2_ext_controls *p = arg; + int i; + + printk("%s: ctrl_class=%d, count=%d\n", s, p->ctrl_class, p->count); + for (i = 0; i < p->count; i++) { + struct v4l2_ext_control *c = &p->controls[i]; + if (cmd == VIDIOC_G_EXT_CTRLS) + printk("%s: id=%d\n", s, c->id); + else + printk("%s: id=%d, value=%d\n", s, c->id, c->value); + } + break; + } case VIDIOC_G_CROP: case VIDIOC_S_CROP: { @@ -935,6 +955,484 @@ void v4l_printk_ioctl_arg(char *s,unsigned int cmd, void *arg) /* ----------------------------------------------------------------- */ +/* Helper functions for control handling */ + +/* Check for correctness of the ctrl's value based on the data from + struct v4l2_queryctrl and the available menu items. Note that + menu_items may be NULL, in that case it is ignored. */ +int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl, + const char **menu_items) +{ + if (qctrl->flags & V4L2_CTRL_FLAG_DISABLED) + return -EINVAL; + if (qctrl->flags & V4L2_CTRL_FLAG_GRABBED) + return -EBUSY; + if (qctrl->type == V4L2_CTRL_TYPE_BUTTON || + qctrl->type == V4L2_CTRL_TYPE_INTEGER64 || + qctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS) + return 0; + if (ctrl->value < qctrl->minimum || ctrl->value > qctrl->maximum) + return -ERANGE; + if (qctrl->type == V4L2_CTRL_TYPE_MENU && menu_items != NULL) { + if (menu_items[ctrl->value] == NULL || + menu_items[ctrl->value][0] == '\0') + return -EINVAL; + } + return 0; +} + +/* Returns NULL or a character pointer array containing the menu for + the given control ID. The pointer array ends with a NULL pointer. + An empty string signifies a menu entry that is invalid. This allows + drivers to disable certain options if it is not supported. */ +const char **v4l2_ctrl_get_menu(u32 id) +{ + static const char *mpeg_audio_sampling_freq[] = { + "44.1 kHz", + "48 kHz", + "32 kHz", + NULL + }; + static const char *mpeg_audio_encoding[] = { + "Layer I", + "Layer II", + "Layer III", + NULL + }; + static const char *mpeg_audio_l1_bitrate[] = { + "32 kbps", + "64 kbps", + "96 kbps", + "128 kbps", + "160 kbps", + "192 kbps", + "224 kbps", + "256 kbps", + "288 kbps", + "320 kbps", + "352 kbps", + "384 kbps", + "416 kbps", + "448 kbps", + NULL + }; + static const char *mpeg_audio_l2_bitrate[] = { + "32 kbps", + "48 kbps", + "56 kbps", + "64 kbps", + "80 kbps", + "96 kbps", + "112 kbps", + "128 kbps", + "160 kbps", + "192 kbps", + "224 kbps", + "256 kbps", + "320 kbps", + "384 kbps", + NULL + }; + static const char *mpeg_audio_l3_bitrate[] = { + "32 kbps", + "40 kbps", + "48 kbps", + "56 kbps", + "64 kbps", + "80 kbps", + "96 kbps", + "112 kbps", + "128 kbps", + "160 kbps", + "192 kbps", + "224 kbps", + "256 kbps", + "320 kbps", + NULL + }; + static const char *mpeg_audio_mode[] = { + "Stereo", + "Joint Stereo", + "Dual", + "Mono", + NULL + }; + static const char *mpeg_audio_mode_extension[] = { + "Bound 4", + "Bound 8", + "Bound 12", + "Bound 16", + NULL + }; + static const char *mpeg_audio_emphasis[] = { + "No Emphasis", + "50/15 us", + "CCITT J17", + NULL + }; + static const char *mpeg_audio_crc[] = { + "No CRC", + "16-bit CRC", + NULL + }; + static const char *mpeg_video_encoding[] = { + "MPEG-1", + "MPEG-2", + NULL + }; + static const char *mpeg_video_aspect[] = { + "1x1", + "4x3", + "16x9", + "2.21x1", + NULL + }; + static const char *mpeg_video_bitrate_mode[] = { + "Variable Bitrate", + "Constant Bitrate", + NULL + }; + static const char *mpeg_stream_type[] = { + "MPEG-2 Program Stream", + "MPEG-2 Transport Stream", + "MPEG-1 System Stream", + "MPEG-2 DVD-compatible Stream", + "MPEG-1 VCD-compatible Stream", + "MPEG-2 SVCD-compatible Stream", + NULL + }; + + switch (id) { + case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: + return mpeg_audio_sampling_freq; + case V4L2_CID_MPEG_AUDIO_ENCODING: + return mpeg_audio_encoding; + case V4L2_CID_MPEG_AUDIO_L1_BITRATE: + return mpeg_audio_l1_bitrate; + case V4L2_CID_MPEG_AUDIO_L2_BITRATE: + return mpeg_audio_l2_bitrate; + case V4L2_CID_MPEG_AUDIO_L3_BITRATE: + return mpeg_audio_l3_bitrate; + case V4L2_CID_MPEG_AUDIO_MODE: + return mpeg_audio_mode; + case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: + return mpeg_audio_mode_extension; + case V4L2_CID_MPEG_AUDIO_EMPHASIS: + return mpeg_audio_emphasis; + case V4L2_CID_MPEG_AUDIO_CRC: + return mpeg_audio_crc; + case V4L2_CID_MPEG_VIDEO_ENCODING: + return mpeg_video_encoding; + case V4L2_CID_MPEG_VIDEO_ASPECT: + return mpeg_video_aspect; + case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: + return mpeg_video_bitrate_mode; + case V4L2_CID_MPEG_STREAM_TYPE: + return mpeg_stream_type; + default: + return NULL; + } +} + +/* 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; + + qctrl->flags = 0; + switch (qctrl->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; + + /* 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 Layer"; 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_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_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_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; + + default: + return -EINVAL; + } + switch (qctrl->id) { + case V4L2_CID_AUDIO_MUTE: + case V4L2_CID_AUDIO_LOUDNESS: + case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: + case V4L2_CID_MPEG_VIDEO_PULLDOWN: + qctrl->type = V4L2_CTRL_TYPE_BOOLEAN; + min = 0; + max = step = 1; + break; + case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: + case V4L2_CID_MPEG_AUDIO_ENCODING: + case V4L2_CID_MPEG_AUDIO_L1_BITRATE: + case V4L2_CID_MPEG_AUDIO_L2_BITRATE: + case V4L2_CID_MPEG_AUDIO_L3_BITRATE: + case V4L2_CID_MPEG_AUDIO_MODE: + case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: + case V4L2_CID_MPEG_AUDIO_EMPHASIS: + case V4L2_CID_MPEG_AUDIO_CRC: + case V4L2_CID_MPEG_VIDEO_ENCODING: + case V4L2_CID_MPEG_VIDEO_ASPECT: + case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: + case V4L2_CID_MPEG_STREAM_TYPE: + qctrl->type = V4L2_CTRL_TYPE_MENU; + step = 1; + break; + case V4L2_CID_USER_CLASS: + case V4L2_CID_MPEG_CLASS: + qctrl->type = V4L2_CTRL_TYPE_CTRL_CLASS; + qctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; + min = max = step = def = 0; + break; + default: + qctrl->type = V4L2_CTRL_TYPE_INTEGER; + break; + } + switch (qctrl->id) { + case V4L2_CID_MPEG_AUDIO_ENCODING: + case V4L2_CID_MPEG_AUDIO_MODE: + case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: + case V4L2_CID_MPEG_VIDEO_B_FRAMES: + case V4L2_CID_MPEG_STREAM_TYPE: + qctrl->flags |= V4L2_CTRL_FLAG_UPDATE; + break; + case V4L2_CID_AUDIO_VOLUME: + case V4L2_CID_AUDIO_BALANCE: + case V4L2_CID_AUDIO_BASS: + case V4L2_CID_AUDIO_TREBLE: + case V4L2_CID_BRIGHTNESS: + case V4L2_CID_CONTRAST: + case V4L2_CID_SATURATION: + case V4L2_CID_HUE: + qctrl->flags |= V4L2_CTRL_FLAG_SLIDER; + break; + } + qctrl->minimum = min; + qctrl->maximum = max; + qctrl->step = step; + qctrl->default_value = def; + qctrl->reserved[0] = qctrl->reserved[1] = 0; + snprintf(qctrl->name, sizeof(qctrl->name), name); + return 0; +} + +/* Fill in a struct v4l2_queryctrl with standard values based on + the control ID. */ +int v4l2_ctrl_query_fill_std(struct v4l2_queryctrl *qctrl) +{ + switch (qctrl->id) { + /* USER controls */ + case V4L2_CID_USER_CLASS: + case V4L2_CID_MPEG_CLASS: + return v4l2_ctrl_query_fill(qctrl, 0, 0, 0, 0); + case V4L2_CID_AUDIO_VOLUME: + return v4l2_ctrl_query_fill(qctrl, 0, 65535, 65535 / 100, 58880); + case V4L2_CID_AUDIO_MUTE: + case V4L2_CID_AUDIO_LOUDNESS: + return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0); + case V4L2_CID_AUDIO_BALANCE: + case V4L2_CID_AUDIO_BASS: + case V4L2_CID_AUDIO_TREBLE: + return v4l2_ctrl_query_fill(qctrl, 0, 65535, 65535 / 100, 32768); + case V4L2_CID_BRIGHTNESS: + return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 128); + case V4L2_CID_CONTRAST: + case V4L2_CID_SATURATION: + return v4l2_ctrl_query_fill(qctrl, 0, 127, 1, 64); + case V4L2_CID_HUE: + return v4l2_ctrl_query_fill(qctrl, -128, 127, 1, 0); + + /* MPEG controls */ + case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: + return v4l2_ctrl_query_fill(qctrl, + V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100, + V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000, 1, + V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000); + case V4L2_CID_MPEG_AUDIO_ENCODING: + return v4l2_ctrl_query_fill(qctrl, + V4L2_MPEG_AUDIO_ENCODING_LAYER_1, + V4L2_MPEG_AUDIO_ENCODING_LAYER_3, 1, + V4L2_MPEG_AUDIO_ENCODING_LAYER_2); + case V4L2_CID_MPEG_AUDIO_L1_BITRATE: + return v4l2_ctrl_query_fill(qctrl, + V4L2_MPEG_AUDIO_L1_BITRATE_32K, + V4L2_MPEG_AUDIO_L1_BITRATE_448K, 1, + V4L2_MPEG_AUDIO_L1_BITRATE_256K); + case V4L2_CID_MPEG_AUDIO_L2_BITRATE: + return v4l2_ctrl_query_fill(qctrl, + V4L2_MPEG_AUDIO_L2_BITRATE_32K, + V4L2_MPEG_AUDIO_L2_BITRATE_384K, 1, + V4L2_MPEG_AUDIO_L2_BITRATE_224K); + case V4L2_CID_MPEG_AUDIO_L3_BITRATE: + return v4l2_ctrl_query_fill(qctrl, + V4L2_MPEG_AUDIO_L3_BITRATE_32K, + V4L2_MPEG_AUDIO_L3_BITRATE_320K, 1, + V4L2_MPEG_AUDIO_L3_BITRATE_192K); + case V4L2_CID_MPEG_AUDIO_MODE: + return v4l2_ctrl_query_fill(qctrl, + V4L2_MPEG_AUDIO_MODE_STEREO, + V4L2_MPEG_AUDIO_MODE_MONO, 1, + V4L2_MPEG_AUDIO_MODE_STEREO); + case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: + return v4l2_ctrl_query_fill(qctrl, + V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4, + V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_16, 1, + V4L2_MPEG_AUDIO_MODE_EXTENSION_BOUND_4); + case V4L2_CID_MPEG_AUDIO_EMPHASIS: + return v4l2_ctrl_query_fill(qctrl, + V4L2_MPEG_AUDIO_EMPHASIS_NONE, + V4L2_MPEG_AUDIO_EMPHASIS_CCITT_J17, 1, + V4L2_MPEG_AUDIO_EMPHASIS_NONE); + case V4L2_CID_MPEG_AUDIO_CRC: + return v4l2_ctrl_query_fill(qctrl, + V4L2_MPEG_AUDIO_CRC_NONE, + V4L2_MPEG_AUDIO_CRC_CRC16, 1, + V4L2_MPEG_AUDIO_CRC_NONE); + case V4L2_CID_MPEG_VIDEO_ENCODING: + return v4l2_ctrl_query_fill(qctrl, + V4L2_MPEG_VIDEO_ENCODING_MPEG_1, + V4L2_MPEG_VIDEO_ENCODING_MPEG_2, 1, + V4L2_MPEG_VIDEO_ENCODING_MPEG_2); + case V4L2_CID_MPEG_VIDEO_ASPECT: + return v4l2_ctrl_query_fill(qctrl, + V4L2_MPEG_VIDEO_ASPECT_1x1, + V4L2_MPEG_VIDEO_ASPECT_221x100, 1, + V4L2_MPEG_VIDEO_ASPECT_4x3); + case V4L2_CID_MPEG_VIDEO_B_FRAMES: + return v4l2_ctrl_query_fill(qctrl, 0, 33, 1, 2); + case V4L2_CID_MPEG_VIDEO_GOP_SIZE: + return v4l2_ctrl_query_fill(qctrl, 1, 34, 1, 12); + case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: + return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 1); + case V4L2_CID_MPEG_VIDEO_PULLDOWN: + return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0); + case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: + return v4l2_ctrl_query_fill(qctrl, + V4L2_MPEG_VIDEO_BITRATE_MODE_VBR, + V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 1, + V4L2_MPEG_VIDEO_BITRATE_MODE_VBR); + case V4L2_CID_MPEG_VIDEO_BITRATE: + return v4l2_ctrl_query_fill(qctrl, 0, 27000000, 1, 6000000); + case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: + return v4l2_ctrl_query_fill(qctrl, 0, 27000000, 1, 8000000); + case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: + return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 0); + case V4L2_CID_MPEG_STREAM_TYPE: + return v4l2_ctrl_query_fill(qctrl, + V4L2_MPEG_STREAM_TYPE_MPEG2_PS, + V4L2_MPEG_STREAM_TYPE_MPEG2_SVCD, 1, + V4L2_MPEG_STREAM_TYPE_MPEG2_PS); + case V4L2_CID_MPEG_STREAM_PID_PMT: + return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 16); + case V4L2_CID_MPEG_STREAM_PID_AUDIO: + return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 260); + case V4L2_CID_MPEG_STREAM_PID_VIDEO: + return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 256); + case V4L2_CID_MPEG_STREAM_PID_PCR: + return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 259); + case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: + return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 0); + case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: + return v4l2_ctrl_query_fill(qctrl, 0, 255, 1, 0); + default: + return -EINVAL; + } +} + +/* Fill in a struct v4l2_querymenu based on the struct v4l2_queryctrl and + the menu. The qctrl pointer may be NULL, in which case it is ignored. */ +int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu, struct v4l2_queryctrl *qctrl, + const char **menu_items) +{ + int i; + + if (menu_items == NULL || + (qctrl && (qmenu->index < qctrl->minimum || qmenu->index > qctrl->maximum))) + return -EINVAL; + for (i = 0; i < qmenu->index && menu_items[i]; i++) ; + if (menu_items[i] == NULL || menu_items[i][0] == '\0') + return -EINVAL; + snprintf(qmenu->name, sizeof(qmenu->name), menu_items[qmenu->index]); + qmenu->reserved = 0; + return 0; +} + +/* ctrl_classes points to an array of u32 pointers, the last element is + a NULL pointer. Each u32 array is a 0-terminated array of control IDs. + Each array must be sorted low to high and belong to the same control + class. The array of u32 pointer must also be sorted, from low class IDs + to high class IDs. + + This function returns the first ID that follows after the given ID. + When no more controls are available 0 is returned. */ +u32 v4l2_ctrl_next(const u32 * const * ctrl_classes, u32 id) +{ + u32 ctrl_class; + const u32 *pctrl; + + /* if no query is desired, then just return the control ID */ + if ((id & V4L2_CTRL_FLAG_NEXT_CTRL) == 0) + return id; + if (ctrl_classes == NULL) + return 0; + id &= V4L2_CTRL_ID_MASK; + ctrl_class = V4L2_CTRL_ID2CLASS(id); + id++; /* select next control */ + /* find first class that matches (or is greater than) the class of + the ID */ + while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) < ctrl_class) + ctrl_classes++; + /* no more classes */ + if (*ctrl_classes == NULL) + return 0; + pctrl = *ctrl_classes; + /* find first ctrl within the class that is >= ID */ + while (*pctrl && *pctrl < id) pctrl++; + if (*pctrl) + return *pctrl; + /* we are at the end of the controls of the current class. */ + /* continue with next class if available */ + ctrl_classes++; + if (*ctrl_classes == NULL) + return 0; + return **ctrl_classes; +} + +/* ----------------------------------------------------------------- */ + EXPORT_SYMBOL(v4l2_video_std_construct); EXPORT_SYMBOL(v4l2_prio_init); @@ -949,6 +1447,13 @@ EXPORT_SYMBOL(v4l2_type_names); EXPORT_SYMBOL(v4l_printk_ioctl); EXPORT_SYMBOL(v4l_printk_ioctl_arg); +EXPORT_SYMBOL(v4l2_ctrl_next); +EXPORT_SYMBOL(v4l2_ctrl_check); +EXPORT_SYMBOL(v4l2_ctrl_get_menu); +EXPORT_SYMBOL(v4l2_ctrl_query_menu); +EXPORT_SYMBOL(v4l2_ctrl_query_fill); +EXPORT_SYMBOL(v4l2_ctrl_query_fill_std); + /* * Local variables: * c-basic-offset: 8 diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h index 1440d4ab6af9..5564db13c0d5 100644 --- a/include/media/v4l2-common.h +++ b/include/media/v4l2-common.h @@ -84,6 +84,19 @@ extern void v4l_printk_ioctl_arg(char *s,unsigned int cmd, void *arg); /* ------------------------------------------------------------------------- */ +/* Control helper functions */ + +int v4l2_ctrl_check(struct v4l2_ext_control *ctrl, struct v4l2_queryctrl *qctrl, + const char **menu_items); +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); +int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu, + struct v4l2_queryctrl *qctrl, const char **menu_items); +u32 v4l2_ctrl_next(const u32 * const *ctrl_classes, u32 id); + +/* ------------------------------------------------------------------------- */ + /* Internal ioctls */ /* VIDIOC_INT_G_REGISTER and VIDIOC_INT_S_REGISTER */ |