[RFC 2/4] apps: cam: Add support for loading configuration from capture script
Jacopo Mondi
jacopo.mondi at ideasonboard.com
Mon Oct 14 11:59:34 CEST 2024
From: Paul Elder <paul.elder at ideasonboard.com>
Add support to the cam application for loading the camera configuration
from a capture script. These are not expected to be written by hand, but
rather dumped via the LIBCAMERA_DUMP_CAPTURE_SCRIPT environment
variable.
If any configuration options are specified by command line parameters,
those will take precedence.
Signed-off-by: Paul Elder <paul.elder at ideasonboard.com>
---
src/apps/cam/camera_session.cpp | 22 +++--
src/apps/cam/capture_script.cpp | 164 ++++++++++++++++++++++++++++++++
src/apps/cam/capture_script.h | 8 ++
3 files changed, 184 insertions(+), 10 deletions(-)
diff --git a/src/apps/cam/camera_session.cpp b/src/apps/cam/camera_session.cpp
index edc49b875450..6f1d8b58870f 100644
--- a/src/apps/cam/camera_session.cpp
+++ b/src/apps/cam/camera_session.cpp
@@ -70,6 +70,18 @@ CameraSession::CameraSession(CameraManager *cm,
return;
}
+ if (options_.isSet(OptCaptureScript)) {
+ std::string scriptName = options_[OptCaptureScript].toString();
+ script_ = std::make_unique<CaptureScript>(camera_, scriptName);
+ if (!script_->valid()) {
+ std::cerr << "Invalid capture script '" << scriptName
+ << "'" << std::endl;
+ return;
+ }
+
+ script_->populateConfiguration(config.get());
+ }
+
if (options_.isSet(OptOrientation)) {
std::string orientOpt = options_[OptOrientation].toString();
static const std::map<std::string, libcamera::Orientation> orientations{
@@ -119,16 +131,6 @@ CameraSession::CameraSession(CameraManager *cm,
}
#endif
- if (options_.isSet(OptCaptureScript)) {
- std::string scriptName = options_[OptCaptureScript].toString();
- script_ = std::make_unique<CaptureScript>(camera_, scriptName);
- if (!script_->valid()) {
- std::cerr << "Invalid capture script '" << scriptName
- << "'" << std::endl;
- return;
- }
- }
-
switch (config->validate()) {
case CameraConfiguration::Valid:
break;
diff --git a/src/apps/cam/capture_script.cpp b/src/apps/cam/capture_script.cpp
index fc1dfa75f2d4..7f166f45657e 100644
--- a/src/apps/cam/capture_script.cpp
+++ b/src/apps/cam/capture_script.cpp
@@ -7,6 +7,7 @@
#include "capture_script.h"
+#include <algorithm>
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
@@ -162,6 +163,10 @@ int CaptureScript::parseScript(FILE *script)
ret = parseFrames();
if (ret)
return ret;
+ } else if (section == "configuration") {
+ ret = parseConfiguration();
+ if (ret)
+ return ret;
} else {
std::cerr << "Unsupported section '" << section << "'"
<< std::endl;
@@ -322,6 +327,165 @@ int CaptureScript::parseControl(EventPtr event, ControlList &controls)
return 0;
}
+int CaptureScript::parseOrientation(EventPtr event)
+{
+ static const std::map<std::string, libcamera::Orientation> orientations{
+ { "Rotate0", libcamera::Orientation::Rotate0 },
+ { "Rotate0Mirror", libcamera::Orientation::Rotate0Mirror },
+ { "Rotate180", libcamera::Orientation::Rotate180 },
+ { "Rotate180Mirror", libcamera::Orientation::Rotate180Mirror },
+ { "Rotate90Mirror", libcamera::Orientation::Rotate90Mirror },
+ { "Rotate270", libcamera::Orientation::Rotate270 },
+ { "Rotate270Mirror", libcamera::Orientation::Rotate270Mirror },
+ { "Rotate90", libcamera::Orientation::Rotate90 },
+ };
+
+ std::string orientation = eventScalarValue(event);
+
+ auto it = orientations.find(orientation);
+ if (it == orientations.end()) {
+ std::cerr << "Invalid orientation '" << orientation
+ << "' in capture script" << std::endl;
+ return -EINVAL;
+ }
+
+ orientation_ = it->second;
+
+ return 0;
+}
+
+int CaptureScript::parseStream(EventPtr event, unsigned int index)
+{
+ if (!checkEvent(event, YAML_MAPPING_START_EVENT))
+ return -EINVAL;
+
+ StreamConfiguration config;
+ while (1) {
+ event = nextEvent();
+ if (!event)
+ return -EINVAL;
+ if (event->type == YAML_MAPPING_END_EVENT)
+ break;
+
+ std::string key = eventScalarValue(event);
+
+ event = nextEvent();
+ if (!event)
+ return -EINVAL;
+ if (event->type == YAML_MAPPING_END_EVENT)
+ break;
+
+ std::string value = eventScalarValue(event);
+
+ if (key == "pixelFormat") {
+ config.pixelFormat = libcamera::PixelFormat::fromString(value);
+ } else if (key == "size") {
+ unsigned int split = value.find("x");
+ if (split == std::string::npos) {
+ std::cerr << "Invalid size '" << value
+ << "' in stream configuration "
+ << index << std::endl;
+ }
+
+ std::string width = value.substr(0, split);
+ std::string height = value.substr(split + 1);
+ config.size = Size(std::stoi(width), std::stoi(height));
+ } else if (key == "stride") {
+ config.stride = std::stoi(value);
+ } else if (key == "frameSize") {
+ config.frameSize = std::stoi(value);
+ } else if (key == "bufferCount") {
+ config.bufferCount = std::stoi(value);
+ } else if (key == "colorSpace") {
+ config.colorSpace = libcamera::ColorSpace::fromString(value);
+ } else {
+ std::cerr << "Unknown key-value pair '"
+ << key << "': '" << value
+ << "' in stream configuration "
+ << index << std::endl;
+ return -EINVAL;
+ }
+ }
+
+ streamConfigs_.push_back(config);
+
+ return 0;
+}
+
+int CaptureScript::parseStreams(EventPtr event)
+{
+ if (!checkEvent(event, YAML_SEQUENCE_START_EVENT))
+ return -EINVAL;
+
+ unsigned int index = 0;
+ while (1) {
+ event = nextEvent();
+ if (!event)
+ return -EINVAL;
+ if (event->type == YAML_SEQUENCE_END_EVENT)
+ return 0;
+
+ if (event->type == YAML_MAPPING_START_EVENT) {
+ parseStream(std::move(event), index++);
+ continue;
+ } else {
+ std::cerr << "UNKNOWN TYPE" << std::endl;
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+int CaptureScript::parseConfiguration()
+{
+ int ret;
+
+ EventPtr event = nextEvent(YAML_MAPPING_START_EVENT);
+ if (!event)
+ return -EINVAL;
+
+ while (1) {
+ event = nextEvent();
+ if (!event)
+ return -EINVAL;
+ if (event->type == YAML_MAPPING_END_EVENT)
+ break;
+
+ std::string key = eventScalarValue(event);
+
+ event = nextEvent();
+ if (!event)
+ return -EINVAL;
+ if (event->type == YAML_MAPPING_END_EVENT)
+ break;
+
+ /* TODO Load sensor configuration */
+ if (key == "orientation") {
+ ret = parseOrientation(std::move(event));
+ if (ret)
+ return ret;
+ } else if (key == "streams") {
+ ret = parseStreams(std::move(event));
+ if (ret)
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+void CaptureScript::populateConfiguration(CameraConfiguration *configuration) const
+{
+ if (!configuration)
+ return;
+
+ configuration->orientation = orientation_;
+
+ for (unsigned int i = 0; i < streamConfigs_.size(); i++)
+ (*configuration)[i] = streamConfigs_[i];
+}
+
std::string CaptureScript::parseScalar()
{
EventPtr event = nextEvent(YAML_SCALAR_EVENT);
diff --git a/src/apps/cam/capture_script.h b/src/apps/cam/capture_script.h
index 294b920363ba..4ba862d742cf 100644
--- a/src/apps/cam/capture_script.h
+++ b/src/apps/cam/capture_script.h
@@ -26,6 +26,7 @@ public:
const libcamera::ControlList &frameControls(unsigned int frame);
+ void populateConfiguration(libcamera::CameraConfiguration *configuration) const;
private:
struct EventDeleter {
void operator()(yaml_event_t *event) const
@@ -43,6 +44,9 @@ private:
unsigned int loop_;
bool valid_;
+ libcamera::Orientation orientation_;
+ std::vector<libcamera::StreamConfiguration> streamConfigs_;
+
EventPtr nextEvent(yaml_event_type_t expectedType = YAML_NO_EVENT);
bool checkEvent(const EventPtr &event, yaml_event_type_t expectedType) const;
static std::string eventScalarValue(const EventPtr &event);
@@ -55,6 +59,10 @@ private:
int parseFrames();
int parseFrame(EventPtr event);
int parseControl(EventPtr event, libcamera::ControlList &controls);
+ int parseConfiguration();
+ int parseOrientation(EventPtr event);
+ int parseStreams(EventPtr event);
+ int parseStream(EventPtr event, unsigned int index);
libcamera::ControlValue parseScalarControl(const libcamera::ControlId *id,
const std::string repr);
--
2.46.2
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