/*
 * Copyright (c) 2014-2015, NVIDIA Corporation.  All rights reserved.
 *
 * NVIDIA Corporation and its licensors retain all intellectual property
 * and proprietary rights in and to this software, related documentation
 * and any modifications thereto.  Any use, reproduction, disclosure or
 * distribution of this software and related documentation without an express
 * license agreement from NVIDIA Corporation is strictly prohibited.
 *
 * version: 0.1
 * <Anaken>
 */

=> PRE-REQUISITES :

1. You must install GStreamer-1.0 on the target board using apt-get, as follows:

   sudo apt-get install gstreamer1.0-tools gstreamer1.0-alsa gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-libav

2. To check the running gstreamer version, use the following command before you start using the nvgstcapture application:

   gst-inspect-1.0 --version

3. Execute the following commands on the target board's Ubuntu command line:

   export DISPLAY=:0

=> NvGstCapture Usage:

* The nvgstcapture application can capture video data and encapsulate encoded data in a container file.

* The nvgstcapture application supports both command-line and runtime options.

=> NvGstCapture Application Options:

    Usage: ./nvgstcapture-1.0 --help

* Command-line options:

  --prev-res                        Preview width & height. USB Range: 0 to 10 (4208x3120) and CSI Range: 2 to 10 (4208x3120) e.g., --prev-res=3
  --cus-prev-res                    Custom Preview width & height [for CSI only] e.g., --cus-prev-res=1920x1080
  --image-res                       Image width & height. Range: 0 to 10 (4208x3120) e.g., --image-res=3
  --video-res                       Video width & height. Range: 0 to 9 (3896x2192) e.g., --video-res=3
  -m, --mode                        Capture mode value (1=still 2=video)
  -v, --video-enc                   Video encoder type (0=h264[HW] 1=vp8[HW] 2=mpeg4[SW] 3=h263[SW])
  -b, --enc-bitrate                 Video encoding Bit-rate(in bytes) e.g., --enc-bitrate=4000000
  -J, --image_enc                   Image encoder type (0=jpeg_SW[jpegenc] 1=jpeg_HW[nvjpegenc])
  -k, --file-type                   Container file type (0=mp4 1=3gp 2=avi)
  --cap-dev-node                    Video capture device node (0=/dev/video0[default], 1=/dev/video1, 2=/dev/video2)
                                    e.g., --cap-dev-node=0
  --svs                             [For USB] (=) chain for video Preview. [For CSI only] use "nvhdmioverlaysink"
  --file-name                       Captured file name. nvcamtest is used by default
  --camsrc                          Camera Source to use (0=v4l2, 1=csi[default], 2=videotest)
  -w, --whitebalance                [For CSI only] Capture whitebalance value
  -s, --scene-mode                  [For CSI only] Camera Scene-Mode value
  -c, --color-effect                [For CSI only] Camera Color Effect value
  --auto-exposure                   [For CSI only] Camera Auto-Exposure value
  --flash                           [For CSI only] Camera Flash value
  --flicker                         [For CSI only] Camera Flicker Detection and Avoidance Mode value
  --contrast                        [For CSI only] Camera Contrast value
  --saturation                      [For CSI only] Camera Saturation value
  --edge-enhancement                [For CSI only] Camera Edge Enhancement value
  --tnr-strength                    [For CSI only] Camera TNR-Strength value
  --tnr-mode                        [For CSI only] Camera TNR Mode value
  --sensor-id                       [For CSI only] Camera Sensor ID value
  --aeRegion                        [For CSI Only] ROI for AE coordinates(top,left,bottom,right) and weight in that order.e.g., --aeRegion="30 40 200 200 1.2"
  --wbRegion                        [For CSI Only] ROI for AWB coordinates(top,left,bottom,right) and weight in that order.e.g., --wbRegion="30 40 200 200 1.2"
  --fpsRange                        [For CSI Only] FPS range values (low, high) e.g., --fpsRange="15 30"
  --exposure-time                   [For CSI only] Capture exposure time value. e.g., --exposure-time=0.033
  -A, --automate                    Run application in automation mode
  -S, --start-time                  Start capture after specified time in seconds. Default = 5 sec (use with --automate or -A only)
  -Q, --quit-after                  Quit application once automation is done after specified time in seconds. Default = 0 sec (use with --automate or -A only)
  -C, --count                       Number of iterations of automation testcase. Default = 1 (use with --automate or -A only)
  --capture-gap                     Number of milliseconds between successive image/video capture. Default = 250 msec (use with --automate and --capture-auto only)
  --capture-time                    Capture video for specified time in seconds. Default = 10 sec (use with --automate and --capture-auto only)
  --toggle-mode                     Toggle between still and video capture modes for count number of times (use with --automate or -A only)
  --capture-auto                    Do image/video capture in automation mode for count number of times(use with --automate or -A only)
  --enum-wb                         Enumerate all white-balance modes for count number of times (use with --automate or -A only)
  --enum-scm                        Enumerate all scene modes for count number of times (use with --automate or -A only)
  --enum-ce                         Enumerate all color-effect modes for count number of times (use with --automate or -A only)
  --enum-ae                         Enumerate all auto-exposure modes for count number of times (use with --automate or -A only)
  --enum-f                          Enumerate all flash modes for count number of times (use with --automate or -A only)
  --enum-fl                         Enumerate all flicker detection and avoidance modes for count number of times (use with --automate or -A only)
  --enum-ct                         Enumerate contrast value through 0 to 1 by a step of 0.1 for count number of times (use with --automate or -A only)
  --enum-st                         Enumerate saturation value through 0 to 2 by a step of 0.1 for count number of times (use with --automate or -A only)
  --enum-ee                         Enumerate edge-enhancement value through 0 to 1 by a step of 0.1 for count number of times (use with --automate or -A only)
  --enum-ts                         Enumerate TNR strength value through 0 to 1 by a step of 0.1 for count number of times (use with --automate or -A only)
  --enum-tnr                        Enumerate all TNR modes for count number of times (use with --automate or -A only)

Supported resolutions in case of CSI Camera
  (2) : 640x480
  (3) : 1280x720
  (4) : 1920x1080
  (5) : 2104x1560
  (6) : 2592x1944
  (7) : 2616x1472
  (8) : 3840x2160
  (9) : 3896x2192
  (10): 4208x3120

* Runtime CSI Camera Command options:

  Help : 'h'
  Quit : 'q'
  Capture: enter 'j' OR
           followed by a timer (e.g., jx5000, capture after 5 seconds) OR
           followed by multishot count (e.g., j:6, capture 6 images)
           timer/multihot values are optional, capture defaults to single shot with timer=0s
  Start Recording : enter '1'
  Stop Recording  : enter '0'
  Video snapshot  : enter '2' (While recording video)
  Set Preview Resolution:
      pcr:<val> e.g., pcr:3
        (2) : 640x480
        (3) : 1280x720
        (4) : 1920x1080
        (5) : 2104x1560
        (6) : 2592x1944
        (7) : 2616x1472
        (8) : 3840x2160
        (9) : 3896x2192
        (10) : 4208x3120
  Get Preview Resolution:
    gpcr
  Set Image Resolution:
      icr:<val> e.g., icr:3
        (2) : 640x480
        (3) : 1280x720
        (4) : 1920x1080
        (5) : 2104x1560
        (6) : 2592x1944
        (7) : 2616x1472
        (8) : 3840x2160
        (9) : 3896x2192
        (10) : 4208x3120
  Get Image Capture Resolution:
    gicr
  Set Video Resolution:
      vcr:<val> e.g., vcr:3
        (2) : 640x480
        (3) : 1280x720
        (4) : 1920x1080
        (5) : 2104x1560
        (6) : 2592x1944
        (7) : 2616x1472
        (8) : 3840x2160
        (9) : 3896x2192
  Get Video Capture Resolution:
    gvcr
  Set Capture Mode:
      mo:<val>
          (1): image
          (2): video
  Get Capture Mode:
      gmo
  Set Sensor Id (0 to 10)
      sid:<val> e.g., sid:2
  Get Sensor Id
      gsid\n"
  Set Whitebalance Mode:
      wb:<val>
          (0): off
          (1): auto
          (2): incandescent
          (3): fluorescent
          (4): warm-fluorescent
          (5): daylight
          (6): cloudy-daylight
          (7): twilight
          (8): shade
  Get Whitebalance Mode:
      gwb
  Set Scene-Mode:
      scm:<val>
          (0): face-priority
          (1): action
          (2): portrait
          (3): landscape
          (4): night
          (5): night-portrait
          (6): theatre
          (7): beach
          (8): snow
          (9): sunset
          (10): steady-photo
          (11): fireworks
          (12): sports
          (13): party
          (14): candle-light
          (15): barcode
  Get Scene-Mode:
      gscm
  Set Color Effect Mode:
      ce:<val>
          (1): off
          (2): mono
          (3): negative
          (4): solarize
          (5): sepia
          (6): posterize
          (7): aqua
  Get Color Effect Mode:
      gce
  Set Auto-Exposure Mode:
      ae:<val>
          (1): off
          (2): on
          (3): OnAutoFlash
          (4): OnAlwaysFlash
          (5): OnFlashRedEye
  Get Auto-Exposure Mode:
      gae
  Set Flash Mode:
      f:<val>
          (0): off
          (1): on
          (2): torch
          (3): auto
  Get Flash Mode:
      gf
  Set Flash Detection and Avoidance Mode:
      fl:<val>
          (0): off
          (1): 50Hz
          (2): 60Hz
          (3): auto
  Get Flash Detection and Avoidance Mode:
      gfl
  Set Contrast (0 to 1):
      ct:<val> e.g., ct:0.75
  Get Contrast:
      gct
  Set Saturation (0 to 2):
      st:<val> e.g., st:1.25
  Get Saturation:
      gst
  Set Exposure Time in seconds:
      ext:<val> e.g., ext:0.033
  Get Exposure Time:
      gext
  Set Edge Enhancement (0 to 1):
      ee:<val> e.g., ee:0.75
  Get Edge Enhancement:
      gee
  Set ROI for AE:\n"
      It needs five values ROI coordinates(top,left,bottom,right)
      and weight in that order
      aer:<val> e.g., aer:20 20 400 400 1.2
  Get ROI for AE:
      gaer
  Set ROI for AWB:
      It needs five values, ROI coordinates(top,left,bottom,right)
      and weight in that order
      wbr:<val> e.g., wbr:20 20 400 400 1.2
  Get ROI for AWB:
      gwbr
  Set FPS range:
      It needs two values, FPS Range (low, high) in that order.
      fpsr:<val> e.g., fpsr:15 30
  Get FPS range:
      gfpsr
  Set TNR Strength (0 to 1):
      ts:<val> e.g., ts:0.75
  Get TNR Strength:
      gts
  Set TNR Mode:
      tnr:<val>
          (0): Original
          (1): Outdoor-low-light
          (2): Outdoor-medium-light
          (3): Outdoor-high-light
          (4): Indoor-low-light
          (5): Indoor-medium-light
          (6): Indoor-high-light
  Get TNR Mode:
      gtnr
  Set Encoding Bit-rate(in bytes):
      br:<val> e.g., br:4000000\n"
  Get Encoding Bit-rate(in bytes):
      gbr

* Runtime USB Camera Command options:

  Help : 'h'
  Quit : 'q'
  Set Capture Mode:
      mo:<val>
          (1): image
          (2): video
  Get Capture Mode:
      gmo
  Capture: enter 'j' OR
           followed by a timer (e.g., jx5000, capture after 5 seconds) OR
           followed by multishot count (e.g., j:6, capture 6 images)
           timer/multihot values are optional, capture defaults to single shot with timer=0s
  Start Recording : enter '1'
  Stop Recording  : enter '0'
  Set Preview Resolution:
      pcr:<val> e.g., pcr:2
          (0) : 176x144
          (1) : 320x240
          (2) : 640x480
          (3) : 1280x720
  NOTE: Preview/Encode resolution will be same as Capture resolution for USB-Camera
  Get Preview Resolution:
      gpcr
  Get Image Capture Resolution:
      gicr
  Get Video Capture Resolution:
      gvcr
  Set Encoding Bit-rate(in bytes):
      br:<val> e.g., br:4000000
  Get Encoding Bit-rate(in bytes):
      gbr
  Set Capture Device Node:
      cdn:<val> e.g., cdn:0
          (0): /dev/video0
          (1): /dev/video1
          (2): /dev/video2
  Get Capture Device Node:
      gcdn

NOTES:

1. The nvgstcapture application generates image and video output files in the same directory as the application itself.

2. Filenames for image and video content are in the formats "nvcamtest(%d).jpg" and "nvcamtest(%d).mp4" respectively,
   where %d is a counter starting from 0 every time you run the application. Rename or move files between runs, to avoid
   overwriting results you want to save.

3. Default H.263 encode resolution is 704x576(4CIF) in AVI container formats.Use --camsrc=2 for h263 video encode.

4. The nvgstcapture application default supports native capture(video only) mode.

5. Advance features, like setting zoom, brightness, exposure, and whitebalance, are not supported with USB-Camera.

6. The nvgstcapture application sets nvjpegenc[HW] by default for Image encoding.

7. User can specify sensor supported custom preview resolution. CSI camera will output at the custom resolution
   but visible preview will be capped at 1080p max. Command:
   ./nvgstcapture-1.0 --prev-res=2 --cus-prev-res=1280x960

8. nvgstcapture-1.0 supports automation. Details of the commands can be found in help. Enlisting a few example commandlines
   of few use-cases:

   i) Capture 50 images with 1080p resolutions:
      ./nvgstcapture-1.0 -A -C 50 --capture-auto --image-res=4

  ii) Capture 5 720p videos, each of length 60 seconds, with a gap of 2 seconds between each recording
      and quit application 10 seconds after that:
      ./nvgstcapture-1.0 -A -C 5 --capture-auto --video-res=3 --capture-time=60 --mode=2 --capture-gap=2000 --quit-after=10
