git.openwrt.org Git - openwrt/staging/ldir.git/blob

   1 From 5a1f76940af2691627837bb4f181a672abfaffa2 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Tue, 2 Feb 2021 15:50:18 +0000
   4 Subject: [PATCH] staging/bcm2835-codec: Add support for pixel aspect
   5  ratio
   6
   7 If the format is detected by the driver and a V4L2_EVENT_SOURCE_CHANGE
   8 event is generated, then pass on the pixel aspect ratio as well.
   9
  10 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  11 ---
  12  .../bcm2835-codec/bcm2835-v4l2-codec.c        | 31 +++++++++++++++++++
  13  1 file changed, 31 insertions(+)
  14
  15 --- a/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
  16 +++ b/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
  17 @@ -602,6 +602,7 @@ struct bcm2835_codec_q_data {
  18         unsigned int            crop_width;
  19         unsigned int            crop_height;
  20         bool                    selection_set;
  21 +       struct v4l2_fract       aspect_ratio;
  22
  23         unsigned int            sizeimage;
  24         unsigned int            sequence;
  25 @@ -981,6 +982,9 @@ static void handle_fmt_changed(struct bc
  26         if (format->es.video.color_space)
  27                 color_mmal2v4l(ctx, format->es.video.color_space);
  28
  29 +       q_data->aspect_ratio.numerator = format->es.video.par.num;
  30 +       q_data->aspect_ratio.denominator = format->es.video.par.den;
  31 +
  32         queue_res_chg_event(ctx);
  33  }
  34
  35 @@ -1657,6 +1661,29 @@ static int vidioc_g_parm(struct file *fi
  36         return 0;
  37  }
  38
  39 +static int vidioc_g_pixelaspect(struct file *file, void *fh, int type,
  40 +                               struct v4l2_fract *f)
  41 +{
  42 +       struct bcm2835_codec_ctx *ctx = file2ctx(file);
  43 +
  44 +       /*
  45 +        * The selection API takes V4L2_BUF_TYPE_VIDEO_CAPTURE and
  46 +        * V4L2_BUF_TYPE_VIDEO_OUTPUT, even if the device implements the MPLANE
  47 +        * API. The V4L2 core will have converted the MPLANE variants to
  48 +        * non-MPLANE.
  49 +        * Open code this instead of using get_q_data in this case.
  50 +        */
  51 +       if (ctx->dev->role != DECODE)
  52 +               return -ENOIOCTLCMD;
  53 +
  54 +       if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
  55 +               return -EINVAL;
  56 +
  57 +       *f = ctx->q_data[V4L2_M2M_DST].aspect_ratio;
  58 +
  59 +       return 0;
  60 +}
  61 +
  62  static int vidioc_subscribe_evt(struct v4l2_fh *fh,
  63                                 const struct v4l2_event_subscription *sub)
  64  {
  65 @@ -2082,6 +2109,8 @@ static const struct v4l2_ioctl_ops bcm28
  66         .vidioc_g_parm          = vidioc_g_parm,
  67         .vidioc_s_parm          = vidioc_s_parm,
  68
  69 +       .vidioc_g_pixelaspect   = vidioc_g_pixelaspect,
  70 +
  71         .vidioc_subscribe_event = vidioc_subscribe_evt,
  72         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
  73
  74 @@ -2640,6 +2669,8 @@ static int bcm2835_codec_open(struct fil
  75                               ctx->q_data[V4L2_M2M_DST].crop_width,
  76                               ctx->q_data[V4L2_M2M_DST].height,
  77                               ctx->q_data[V4L2_M2M_DST].fmt);
  78 +       ctx->q_data[V4L2_M2M_DST].aspect_ratio.numerator = 1;
  79 +       ctx->q_data[V4L2_M2M_DST].aspect_ratio.denominator = 1;
  80
  81         ctx->colorspace = V4L2_COLORSPACE_REC709;
  82         ctx->bitrate = 10 * 1000 * 1000;