| /* |
| * Video for Linux Two |
| * |
| * A generic video device interface for the LINUX operating system |
| * using a set of device structures/vectors for low level operations. |
| * |
| * This file replaces the videodev.c file that comes with the |
| * regular kernel distribution. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| * Author: Bill Dirks <bill@thedirks.org> |
| * based on code by Alan Cox, <alan@cymru.net> |
| * |
| */ |
| |
| /* |
| * Video capture interface for Linux |
| * |
| * A generic video device interface for the LINUX operating system |
| * using a set of device structures/vectors for low level operations. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| * Author: Alan Cox, <alan@lxorguk.ukuu.org.uk> |
| * |
| * Fixes: |
| */ |
| |
| /* |
| * Video4linux 1/2 integration by Justin Schoeman |
| * <justin@suntiger.ee.up.ac.za> |
| * 2.4 PROCFS support ported from 2.4 kernels by |
| * Iñaki García Etxebarria <garetxe@euskalnet.net> |
| * Makefile fix by "W. Michael Petullo" <mike@flyn.org> |
| * 2.4 devfs support ported from 2.4 kernels by |
| * Dan Merillat <dan@merillat.org> |
| * Added Gerd Knorrs v4l1 enhancements (Justin Schoeman) |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/kernel.h> |
| #include <linux/mm.h> |
| #include <linux/string.h> |
| #include <linux/errno.h> |
| #include <linux/i2c.h> |
| #include <asm/uaccess.h> |
| #include <asm/system.h> |
| #include <asm/pgtable.h> |
| #include <asm/io.h> |
| #include <asm/div64.h> |
| #define __OLD_VIDIOC_ /* To allow fixing old calls*/ |
| #include <media/v4l2-common.h> |
| #include <media/v4l2-chip-ident.h> |
| |
| #include <linux/videodev2.h> |
| |
| MODULE_AUTHOR("Bill Dirks, Justin Schoeman, Gerd Knorr"); |
| MODULE_DESCRIPTION("misc helper functions for v4l2 device drivers"); |
| MODULE_LICENSE("GPL"); |
| |
| /* |
| * |
| * V 4 L 2 D R I V E R H E L P E R A P I |
| * |
| */ |
| |
| /* |
| * Video Standard Operations (contributed by Michael Schimek) |
| */ |
| |
| |
| /* ----------------------------------------------------------------- */ |
| /* priority handling */ |
| |
| #define V4L2_PRIO_VALID(val) (val == V4L2_PRIORITY_BACKGROUND || \ |
| val == V4L2_PRIORITY_INTERACTIVE || \ |
| val == V4L2_PRIORITY_RECORD) |
| |
| int v4l2_prio_init(struct v4l2_prio_state *global) |
| { |
| memset(global,0,sizeof(*global)); |
| return 0; |
| } |
| EXPORT_SYMBOL(v4l2_prio_init); |
| |
| int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local, |
| enum v4l2_priority new) |
| { |
| if (!V4L2_PRIO_VALID(new)) |
| return -EINVAL; |
| if (*local == new) |
| return 0; |
| |
| atomic_inc(&global->prios[new]); |
| if (V4L2_PRIO_VALID(*local)) |
| atomic_dec(&global->prios[*local]); |
| *local = new; |
| return 0; |
| } |
| EXPORT_SYMBOL(v4l2_prio_change); |
| |
| int v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local) |
| { |
| return v4l2_prio_change(global,local,V4L2_PRIORITY_DEFAULT); |
| } |
| EXPORT_SYMBOL(v4l2_prio_open); |
| |
| int v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority *local) |
| { |
| if (V4L2_PRIO_VALID(*local)) |
| atomic_dec(&global->prios[*local]); |
| return 0; |
| } |
| EXPORT_SYMBOL(v4l2_prio_close); |
| |
| enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global) |
| { |
| if (atomic_read(&global->prios[V4L2_PRIORITY_RECORD]) > 0) |
| return V4L2_PRIORITY_RECORD; |
| if (atomic_read(&global->prios[V4L2_PRIORITY_INTERACTIVE]) > 0) |
| return V4L2_PRIORITY_INTERACTIVE; |
| if (atomic_read(&global->prios[V4L2_PRIORITY_BACKGROUND]) > 0) |
| return V4L2_PRIORITY_BACKGROUND; |
| return V4L2_PRIORITY_UNSET; |
| } |
| EXPORT_SYMBOL(v4l2_prio_max); |
| |
| int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local) |
| { |
| if (*local < v4l2_prio_max(global)) |
| return -EBUSY; |
| return 0; |
| } |
| EXPORT_SYMBOL(v4l2_prio_check); |
| |
| /* ----------------------------------------------------------------- */ |
| |
| /* 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; |
| } |
| EXPORT_SYMBOL(v4l2_ctrl_check); |
| |
| /* 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[] = { |
| "MPEG-1/2 Layer I", |
| "MPEG-1/2 Layer II", |
| "MPEG-1/2 Layer III", |
| "MPEG-2/4 AAC", |
| "AC-3", |
| 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_ac3_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", |
| "384 kbps", |
| "448 kbps", |
| "512 kbps", |
| "576 kbps", |
| "640 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", |
| "MPEG-4 AVC", |
| 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 |
| }; |
| static const char *mpeg_stream_vbi_fmt[] = { |
| "No VBI", |
| "Private packet, IVTV format", |
| 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_AC3_BITRATE: |
| return mpeg_audio_ac3_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; |
| case V4L2_CID_MPEG_STREAM_VBI_FMT: |
| return mpeg_stream_vbi_fmt; |
| default: |
| return NULL; |
| } |
| } |
| EXPORT_SYMBOL(v4l2_ctrl_get_menu); |
| |
| /* Return the control name. */ |
| const char *v4l2_ctrl_get_name(u32 id) |
| { |
| switch (id) { |
| /* USER controls */ |
| 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: 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_AAC_BITRATE: return "Audio AAC 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 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: |
| case V4L2_CID_MPEG_AUDIO_MUTE: |
| case V4L2_CID_MPEG_VIDEO_MUTE: |
| 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_AC3_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: |
| case V4L2_CID_MPEG_STREAM_VBI_FMT: |
| 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; |
| } |
| EXPORT_SYMBOL(v4l2_ctrl_query_fill); |
| |
| /* 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_AC3, 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_AAC_BITRATE: |
| return v4l2_ctrl_query_fill(qctrl, 0, 6400, 1, 3200000); |
| case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: |
| return v4l2_ctrl_query_fill(qctrl, |
| V4L2_MPEG_AUDIO_AC3_BITRATE_32K, |
| V4L2_MPEG_AUDIO_AC3_BITRATE_640K, 1, |
| V4L2_MPEG_AUDIO_AC3_BITRATE_384K); |
| 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_AUDIO_MUTE: |
| return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0); |
| case V4L2_CID_MPEG_VIDEO_ENCODING: |
| return v4l2_ctrl_query_fill(qctrl, |
| V4L2_MPEG_VIDEO_ENCODING_MPEG_1, |
| V4L2_MPEG_VIDEO_ENCODING_MPEG_4_AVC, 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_VIDEO_MUTE: |
| return v4l2_ctrl_query_fill(qctrl, 0, 1, 1, 0); |
| case V4L2_CID_MPEG_VIDEO_MUTE_YUV: /* Init YUV (really YCbCr) to black */ |
| return v4l2_ctrl_query_fill(qctrl, 0, 0xffffff, 1, 0x008080); |
| 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); |
| case V4L2_CID_MPEG_STREAM_VBI_FMT: |
| return v4l2_ctrl_query_fill(qctrl, |
| V4L2_MPEG_STREAM_VBI_FMT_NONE, |
| V4L2_MPEG_STREAM_VBI_FMT_IVTV, 1, |
| V4L2_MPEG_STREAM_VBI_FMT_NONE); |
| default: |
| return -EINVAL; |
| } |
| } |
| EXPORT_SYMBOL(v4l2_ctrl_query_fill_std); |
| |
| /* 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. |
| If menu_items is NULL, then the menu items are retrieved using |
| v4l2_ctrl_get_menu. */ |
| int v4l2_ctrl_query_menu(struct v4l2_querymenu *qmenu, struct v4l2_queryctrl *qctrl, |
| const char **menu_items) |
| { |
| int i; |
| |
| qmenu->reserved = 0; |
| if (menu_items == NULL) |
| menu_items = v4l2_ctrl_get_menu(qmenu->id); |
| 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]); |
| return 0; |
| } |
| EXPORT_SYMBOL(v4l2_ctrl_query_menu); |
| |
| /* Fill in a struct v4l2_querymenu based on the specified array of valid |
| menu items (terminated by V4L2_CTRL_MENU_IDS_END). |
| Use this if there are 'holes' in the list of valid menu items. */ |
| int v4l2_ctrl_query_menu_valid_items(struct v4l2_querymenu *qmenu, const u32 *ids) |
| { |
| const char **menu_items = v4l2_ctrl_get_menu(qmenu->id); |
| |
| qmenu->reserved = 0; |
| if (menu_items == NULL || ids == NULL) |
| return -EINVAL; |
| while (*ids != V4L2_CTRL_MENU_IDS_END) { |
| if (*ids++ == qmenu->index) { |
| snprintf(qmenu->name, sizeof(qmenu->name), |
| menu_items[qmenu->index]); |
| return 0; |
| } |
| } |
| return -EINVAL; |
| } |
| EXPORT_SYMBOL(v4l2_ctrl_query_menu_valid_items); |
| |
| /* 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 = V4L2_CTRL_ID2CLASS(id); |
| const u32 *pctrl; |
| |
| if (ctrl_classes == NULL) |
| return 0; |
| |
| /* if no query is desired, then check if the ID is part of ctrl_classes */ |
| if ((id & V4L2_CTRL_FLAG_NEXT_CTRL) == 0) { |
| /* find class */ |
| while (*ctrl_classes && V4L2_CTRL_ID2CLASS(**ctrl_classes) != ctrl_class) |
| ctrl_classes++; |
| if (*ctrl_classes == NULL) |
| return 0; |
| pctrl = *ctrl_classes; |
| /* find control ID */ |
| while (*pctrl && *pctrl != id) pctrl++; |
| return *pctrl ? id : 0; |
| } |
| id &= V4L2_CTRL_ID_MASK; |
| 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_ctrl_next); |
| |
| int v4l2_chip_match_host(u32 match_type, u32 match_chip) |
| { |
| switch (match_type) { |
| case V4L2_CHIP_MATCH_HOST: |
| return match_chip == 0; |
| default: |
| return 0; |
| } |
| } |
| EXPORT_SYMBOL(v4l2_chip_match_host); |
| |
| #if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE)) |
| int v4l2_chip_match_i2c_client(struct i2c_client *c, u32 match_type, u32 match_chip) |
| { |
| switch (match_type) { |
| case V4L2_CHIP_MATCH_I2C_DRIVER: |
| return (c != NULL && c->driver != NULL && c->driver->id == match_chip); |
| case V4L2_CHIP_MATCH_I2C_ADDR: |
| return (c != NULL && c->addr == match_chip); |
| default: |
| return 0; |
| } |
| } |
| EXPORT_SYMBOL(v4l2_chip_match_i2c_client); |
| |
| int v4l2_chip_ident_i2c_client(struct i2c_client *c, struct v4l2_chip_ident *chip, |
| u32 ident, u32 revision) |
| { |
| if (!v4l2_chip_match_i2c_client(c, chip->match_type, chip->match_chip)) |
| return 0; |
| if (chip->ident == V4L2_IDENT_NONE) { |
| chip->ident = ident; |
| chip->revision = revision; |
| } |
| else { |
| chip->ident = V4L2_IDENT_AMBIGUOUS; |
| chip->revision = 0; |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(v4l2_chip_ident_i2c_client); |
| |
| /* ----------------------------------------------------------------- */ |
| |
| /* Helper function for I2C legacy drivers */ |
| |
| int v4l2_i2c_attach(struct i2c_adapter *adapter, int address, struct i2c_driver *driver, |
| const char *name, |
| int (*probe)(struct i2c_client *, const struct i2c_device_id *)) |
| { |
| struct i2c_client *client; |
| int err; |
| |
| client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); |
| if (!client) |
| return -ENOMEM; |
| |
| client->addr = address; |
| client->adapter = adapter; |
| client->driver = driver; |
| strlcpy(client->name, name, sizeof(client->name)); |
| |
| err = probe(client, NULL); |
| if (err == 0) { |
| i2c_attach_client(client); |
| } else { |
| kfree(client); |
| } |
| return err != -ENOMEM ? 0 : err; |
| } |
| EXPORT_SYMBOL(v4l2_i2c_attach); |
| #endif |