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authorNaushir Patuck <naush@raspberrypi.com>2020-11-16 14:37:56 +0000
committerKieran Bingham <kieran.bingham@ideasonboard.com>2020-11-16 20:46:40 +0000
commit6f51e39d78dfc6fdd1add732e282de119600447c (patch)
treedb3d21cbcddbd08aaf1bf4fa5b7a9d872abd6846 /src
parentd14a3f8ae62d74a21f1a04d1fbbbd23b762a6236 (diff)
pipeline: raspberrypi: Use MappedFrameBuffer for embedded data buffers
Use a MappedFrameBuffer to mmap embedded data buffers for the pipeline handler to use in the cases where the sensor does not fill it in. This avoids the need to mmap and unmap on every frame. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Diffstat (limited to 'src')
-rw-r--r--src/libcamera/pipeline/raspberrypi/raspberrypi.cpp33
1 files changed, 25 insertions, 8 deletions
diff --git a/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp b/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp
index 7ad66f21..a80413f9 100644
--- a/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp
+++ b/src/libcamera/pipeline/raspberrypi/raspberrypi.cpp
@@ -24,6 +24,7 @@
#include <linux/videodev2.h>
#include "libcamera/internal/bayer_format.h"
+#include "libcamera/internal/buffer.h"
#include "libcamera/internal/camera_sensor.h"
#include "libcamera/internal/device_enumerator.h"
#include "libcamera/internal/ipa_manager.h"
@@ -165,6 +166,12 @@ public:
/* Stores the ids of the buffers mapped in the IPA. */
std::unordered_set<unsigned int> ipaBuffers_;
+ /*
+ * Map of (internal) mmaped embedded data buffers, to avoid having to
+ * map/unmap on every frame.
+ */
+ std::map<unsigned int, MappedFrameBuffer> mappedEmbeddedBuffers_;
+
/* DMAHEAP allocation helper. */
RPi::DmaHeap dmaHeap_;
FileDescriptor lsTable_;
@@ -1061,6 +1068,13 @@ int PipelineHandlerRPi::prepareBuffers(Camera *camera)
return ret;
}
+ if (!data->sensorMetadata_) {
+ for (auto const &it : data->unicam_[Unicam::Embedded].getBuffers()) {
+ MappedFrameBuffer fb(it.second, PROT_READ | PROT_WRITE);
+ data->mappedEmbeddedBuffers_.emplace(it.first, std::move(fb));
+ }
+ }
+
/*
* Pass the stats and embedded data buffers to the IPA. No other
* buffers need to be passed.
@@ -1099,6 +1113,7 @@ void PipelineHandlerRPi::freeBuffers(Camera *camera)
std::vector<unsigned int> ipaBuffers(data->ipaBuffers_.begin(), data->ipaBuffers_.end());
data->ipa_->unmapBuffers(ipaBuffers);
data->ipaBuffers_.clear();
+ data->mappedEmbeddedBuffers_.clear();
for (auto const stream : data->streams_)
stream->releaseBuffers();
@@ -1349,14 +1364,16 @@ void RPiCameraData::unicamBufferDequeue(FrameBuffer *buffer)
* metadata buffer.
*/
if (!sensorMetadata_) {
- const FrameBuffer &fb = buffer->planes();
- uint32_t *mem = static_cast<uint32_t *>(::mmap(nullptr, fb.planes()[0].length,
- PROT_READ | PROT_WRITE,
- MAP_SHARED,
- fb.planes()[0].fd.fd(), 0));
- mem[0] = ctrl[V4L2_CID_EXPOSURE];
- mem[1] = ctrl[V4L2_CID_ANALOGUE_GAIN];
- munmap(mem, fb.planes()[0].length);
+ unsigned int bufferId = unicam_[Unicam::Embedded].getBufferId(buffer);
+ auto it = mappedEmbeddedBuffers_.find(bufferId);
+ if (it != mappedEmbeddedBuffers_.end()) {
+ uint32_t *mem = reinterpret_cast<uint32_t *>(it->second.maps()[0].data());
+ mem[0] = ctrl[V4L2_CID_EXPOSURE];
+ mem[1] = ctrl[V4L2_CID_ANALOGUE_GAIN];
+ } else {
+ LOG(RPI, Warning) << "Failed to find embedded buffer "
+ << bufferId;
+ }
}
}