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88 lines
3.3 KiB
Diff
88 lines
3.3 KiB
Diff
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From 02ceda02182f6cb538be397b8d8f34b64a254559 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.org>
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Date: Mon, 13 Feb 2017 11:10:50 +0000
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Subject: [PATCH] BCM2835-V4L2: Ensure H264 header bytes get a sensible
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timestamp
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H264 header come off VC with 0 timestamps, which means they get a
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strange timestamp when processed with VC/kernel start times,
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particularly if used with the inline header option.
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Remember the last frame timestamp and use that if set, or otherwise
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use the kernel start time.
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https://github.com/raspberrypi/linux/issues/1836
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
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---
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drivers/media/platform/bcm2835/bcm2835-camera.c | 30 ++++++++++++++++++++++---
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drivers/media/platform/bcm2835/bcm2835-camera.h | 2 ++
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2 files changed, 29 insertions(+), 3 deletions(-)
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--- a/drivers/media/platform/bcm2835/bcm2835-camera.c
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+++ b/drivers/media/platform/bcm2835/bcm2835-camera.c
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@@ -356,8 +356,13 @@ static void buffer_cb(struct vchiq_mmal_
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}
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} else {
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if (dev->capture.frame_count) {
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- if (dev->capture.vc_start_timestamp != -1 &&
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- pts != 0) {
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+ if (dev->capture.vc_start_timestamp == -1) {
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+ buf->vb.vb2_buf.timestamp = ktime_get_ns();
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+ v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
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+ "Buffer time set as current time - %lld",
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+ buf->vb.vb2_buf.timestamp);
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+
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+ } else if(pts != 0) {
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struct timeval timestamp;
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s64 runtime_us = pts -
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dev->capture.vc_start_timestamp;
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@@ -390,10 +395,27 @@ static void buffer_cb(struct vchiq_mmal_
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buf->vb.vb2_buf.timestamp = timestamp.tv_sec * 1000000000ULL +
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timestamp.tv_usec * 1000ULL;
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} else {
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- buf->vb.vb2_buf.timestamp = ktime_get_ns();
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+ if (dev->capture.last_timestamp) {
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+ buf->vb.vb2_buf.timestamp = dev->capture.last_timestamp;
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+ v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
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+ "Buffer time set as last timestamp - %lld",
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+ buf->vb.vb2_buf.timestamp);
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+ }
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+ else {
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+ buf->vb.vb2_buf.timestamp =
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+ dev->capture.kernel_start_ts.tv_sec * 1000000000ULL +
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+ dev->capture.kernel_start_ts.tv_usec * 1000ULL;
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+ v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
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+ "Buffer time set as start timestamp - %lld",
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+ buf->vb.vb2_buf.timestamp);
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+ }
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}
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+ dev->capture.last_timestamp = buf->vb.vb2_buf.timestamp;
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vb2_set_plane_payload(&buf->vb.vb2_buf, 0, length);
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+ v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
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+ "Buffer has ts %llu",
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+ dev->capture.last_timestamp);
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vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
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if (mmal_flags & MMAL_BUFFER_HEADER_FLAG_EOS &&
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@@ -559,6 +581,8 @@ static int start_streaming(struct vb2_qu
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"Start time %lld size %d\n",
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dev->capture.vc_start_timestamp, parameter_size);
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+ dev->capture.last_timestamp = 0;
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+
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v4l2_get_timestamp(&dev->capture.kernel_start_ts);
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/* enable the camera port */
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--- a/drivers/media/platform/bcm2835/bcm2835-camera.h
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+++ b/drivers/media/platform/bcm2835/bcm2835-camera.h
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@@ -93,6 +93,8 @@ struct bm2835_mmal_dev {
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s64 vc_start_timestamp;
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/* Kernel start timestamp for streaming */
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struct timeval kernel_start_ts;
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+ /* Timestamp of last frame */
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+ u64 last_timestamp;
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struct vchiq_mmal_port *port; /* port being used for capture */
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/* camera port being used for capture */
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