diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.9/950-0196-BCM2835-V4L2-Ensure-H264-header-bytes-get-a-sensible.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.9/950-0196-BCM2835-V4L2-Ensure-H264-header-bytes-get-a-sensible.patch | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.9/950-0196-BCM2835-V4L2-Ensure-H264-header-bytes-get-a-sensible.patch b/target/linux/brcm2708/patches-4.9/950-0196-BCM2835-V4L2-Ensure-H264-header-bytes-get-a-sensible.patch new file mode 100644 index 0000000..df8d4b4 --- /dev/null +++ b/target/linux/brcm2708/patches-4.9/950-0196-BCM2835-V4L2-Ensure-H264-header-bytes-get-a-sensible.patch @@ -0,0 +1,87 @@ +From 02ceda02182f6cb538be397b8d8f34b64a254559 Mon Sep 17 00:00:00 2001 +From: Dave Stevenson <dave.stevenson@raspberrypi.org> +Date: Mon, 13 Feb 2017 11:10:50 +0000 +Subject: [PATCH] BCM2835-V4L2: Ensure H264 header bytes get a sensible + timestamp + +H264 header come off VC with 0 timestamps, which means they get a +strange timestamp when processed with VC/kernel start times, +particularly if used with the inline header option. +Remember the last frame timestamp and use that if set, or otherwise +use the kernel start time. + +https://github.com/raspberrypi/linux/issues/1836 + +Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org> +--- + drivers/media/platform/bcm2835/bcm2835-camera.c | 30 ++++++++++++++++++++++--- + drivers/media/platform/bcm2835/bcm2835-camera.h | 2 ++ + 2 files changed, 29 insertions(+), 3 deletions(-) + +--- a/drivers/media/platform/bcm2835/bcm2835-camera.c ++++ b/drivers/media/platform/bcm2835/bcm2835-camera.c +@@ -356,8 +356,13 @@ static void buffer_cb(struct vchiq_mmal_ + } + } else { + if (dev->capture.frame_count) { +- if (dev->capture.vc_start_timestamp != -1 && +- pts != 0) { ++ if (dev->capture.vc_start_timestamp == -1) { ++ buf->vb.vb2_buf.timestamp = ktime_get_ns(); ++ v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, ++ "Buffer time set as current time - %lld", ++ buf->vb.vb2_buf.timestamp); ++ ++ } else if(pts != 0) { + struct timeval timestamp; + s64 runtime_us = pts - + dev->capture.vc_start_timestamp; +@@ -390,10 +395,27 @@ static void buffer_cb(struct vchiq_mmal_ + buf->vb.vb2_buf.timestamp = timestamp.tv_sec * 1000000000ULL + + timestamp.tv_usec * 1000ULL; + } else { +- buf->vb.vb2_buf.timestamp = ktime_get_ns(); ++ if (dev->capture.last_timestamp) { ++ buf->vb.vb2_buf.timestamp = dev->capture.last_timestamp; ++ v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, ++ "Buffer time set as last timestamp - %lld", ++ buf->vb.vb2_buf.timestamp); ++ } ++ else { ++ buf->vb.vb2_buf.timestamp = ++ dev->capture.kernel_start_ts.tv_sec * 1000000000ULL + ++ dev->capture.kernel_start_ts.tv_usec * 1000ULL; ++ v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, ++ "Buffer time set as start timestamp - %lld", ++ buf->vb.vb2_buf.timestamp); ++ } + } ++ dev->capture.last_timestamp = buf->vb.vb2_buf.timestamp; + + vb2_set_plane_payload(&buf->vb.vb2_buf, 0, length); ++ v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, ++ "Buffer has ts %llu", ++ dev->capture.last_timestamp); + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE); + + if (mmal_flags & MMAL_BUFFER_HEADER_FLAG_EOS && +@@ -559,6 +581,8 @@ static int start_streaming(struct vb2_qu + "Start time %lld size %d\n", + dev->capture.vc_start_timestamp, parameter_size); + ++ dev->capture.last_timestamp = 0; ++ + v4l2_get_timestamp(&dev->capture.kernel_start_ts); + + /* enable the camera port */ +--- a/drivers/media/platform/bcm2835/bcm2835-camera.h ++++ b/drivers/media/platform/bcm2835/bcm2835-camera.h +@@ -93,6 +93,8 @@ struct bm2835_mmal_dev { + s64 vc_start_timestamp; + /* Kernel start timestamp for streaming */ + struct timeval kernel_start_ts; ++ /* Timestamp of last frame */ ++ u64 last_timestamp; + + struct vchiq_mmal_port *port; /* port being used for capture */ + /* camera port being used for capture */ |