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

   1 From 19a2ab86f47213575ebcde216505623bc65e3918 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
   3 Date: Fri, 10 May 2019 14:11:58 +0100
   4 Subject: [PATCH] staging: bcm2835-codec: Convert V4L2 nsec timestamps
   5  to MMAL usec
   6
   7 V4L2 uses nsecs, whilst MMAL uses usecs, but the code wasn't converting
   8 between them. This upsets video encode rate control.
   9
  10 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
  11 ---
  12  .../vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c     | 9 +++++++--
  13  1 file changed, 7 insertions(+), 2 deletions(-)
  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 @@ -823,7 +823,8 @@ static void op_buffer_cb(struct vchiq_mm
  18                 vb2->flags |= V4L2_BUF_FLAG_LAST;
  19         }
  20
  21 -       vb2->vb2_buf.timestamp = mmal_buf->pts;
  22 +       /* vb2 timestamps in nsecs, mmal in usecs */
  23 +       vb2->vb2_buf.timestamp = mmal_buf->pts * 1000;
  24
  25         vb2_set_plane_payload(&vb2->vb2_buf, 0, mmal_buf->length);
  26         if (mmal_buf->mmal_flags & MMAL_BUFFER_HEADER_FLAG_KEYFRAME)
  27 @@ -847,6 +848,7 @@ static void op_buffer_cb(struct vchiq_mm
  28  static void vb2_to_mmal_buffer(struct m2m_mmal_buffer *buf,
  29                                struct vb2_v4l2_buffer *vb2)
  30  {
  31 +       u64 pts;
  32         buf->mmal.mmal_flags = 0;
  33         if (vb2->flags & V4L2_BUF_FLAG_KEYFRAME)
  34                 buf->mmal.mmal_flags |= MMAL_BUFFER_HEADER_FLAG_KEYFRAME;
  35 @@ -869,7 +871,10 @@ static void vb2_to_mmal_buffer(struct m2
  36         if (!buf->mmal.length || vb2->flags & V4L2_BUF_FLAG_LAST)
  37                 buf->mmal.mmal_flags |= MMAL_BUFFER_HEADER_FLAG_EOS;
  38
  39 -       buf->mmal.pts = vb2->vb2_buf.timestamp;
  40 +       /* vb2 timestamps in nsecs, mmal in usecs */
  41 +       pts = vb2->vb2_buf.timestamp;
  42 +       do_div(pts, 1000);
  43 +       buf->mmal.pts = pts;
  44         buf->mmal.dts = MMAL_TIME_UNKNOWN;
  45  }
  46