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pipeline: raspberrypi: Add a parameter to disable startup drop frames

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Add a new pipeline config parameter "disable_startup_frame_drops" to
disable any startup drop frames, overriding the IPA request.

When this parameter is set, it allows the pipeline handler to run with
no internally allocated Unicam buffers ("min_unicam_buffers").

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: David Plowman <david.plowman@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>
This commit is contained in:
Naushir Patuck 2023-01-27 15:43:17 +00:00 • committed by Kieran Bingham
parent 8c53b2498b
commit b47ecacc78
2 changed files with 16 additions and 2 deletions
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7
src/libcamera/pipeline/raspberrypi/data/example.yaml
View file

@ -27,6 +27,11 @@
# internal buffer count = max(min_unicam_buffers,
# min_total_unicam_buffers - external buffer count)
#
# "min_total_unicam_buffers": 4
# "min_total_unicam_buffers": 4,
# Override any request from the IPA to drop a number of startup
# frames.
#
# "disable_startup_frame_drops": false
}
}

11
src/libcamera/pipeline/raspberrypi/raspberrypi.cpp
View file

@ -315,6 +315,11 @@ public:
* minTotalUnicamBuffers >= minUnicamBuffers
*/
unsigned int minTotalUnicamBuffers;
/*
* Override any request from the IPA to drop a number of startup
* frames.
*/
bool disableStartupFrameDrops;
};
Config config_;
@ -1117,7 +1122,8 @@ int PipelineHandlerRPi::start(Camera *camera, const ControlList *controls)
data->setSensorControls(startConfig.controls);
/* Configure the number of dropped frames required on startup. */
data->dropFrameCount_ = startConfig.dropFrameCount;
data->dropFrameCount_ = data->config_.disableStartupFrameDrops
? 0 : startConfig.dropFrameCount;
for (auto const stream : data->streams_)
stream->resetBuffers();
@ -1719,6 +1725,7 @@ int RPiCameraData::loadPipelineConfiguration()
config_ = {
.minUnicamBuffers = 2,
.minTotalUnicamBuffers = 4,
.disableStartupFrameDrops = false,
};
char const *configFromEnv = utils::secure_getenv("LIBCAMERA_RPI_CONFIG_FILE");
@ -1752,6 +1759,8 @@ int RPiCameraData::loadPipelineConfiguration()
phConfig["min_unicam_buffers"].get<unsigned int>(config_.minUnicamBuffers);
config_.minTotalUnicamBuffers =
phConfig["min_total_unicam_buffers"].get<unsigned int>(config_.minTotalUnicamBuffers);
config_.disableStartupFrameDrops =
phConfig["disable_startup_frame_drops"].get<bool>(config_.disableStartupFrameDrops);
if (config_.minTotalUnicamBuffers < config_.minUnicamBuffers) {
LOG(RPI, Error) << "Invalid configuration: min_total_unicam_buffers must be >= min_unicam_buffers";