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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2020, Collabora Ltd.
* Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
*
* gstlibcamera-utils.c - GStreamer libcamera Utility Function
*/
#include "gstlibcamera-utils.h"
#include <linux/drm_fourcc.h>
using namespace libcamera;
static struct {
GstVideoFormat gst_format;
guint drm_fourcc;
} format_map[] = {
{ GST_VIDEO_FORMAT_ENCODED, DRM_FORMAT_MJPEG },
{ GST_VIDEO_FORMAT_RGB, DRM_FORMAT_BGR888 },
{ GST_VIDEO_FORMAT_BGR, DRM_FORMAT_RGB888 },
{ GST_VIDEO_FORMAT_ARGB, DRM_FORMAT_BGRA8888 },
{ GST_VIDEO_FORMAT_NV12, DRM_FORMAT_NV12 },
{ GST_VIDEO_FORMAT_NV21, DRM_FORMAT_NV21 },
{ GST_VIDEO_FORMAT_NV16, DRM_FORMAT_NV16 },
{ GST_VIDEO_FORMAT_NV61, DRM_FORMAT_NV61 },
{ GST_VIDEO_FORMAT_NV24, DRM_FORMAT_NV24 },
{ GST_VIDEO_FORMAT_UYVY, DRM_FORMAT_UYVY },
{ GST_VIDEO_FORMAT_VYUY, DRM_FORMAT_VYUY },
{ GST_VIDEO_FORMAT_YUY2, DRM_FORMAT_YUYV },
{ GST_VIDEO_FORMAT_YVYU, DRM_FORMAT_YVYU },
/* \todo NV42 is used in libcamera but is not mapped in GStreamer yet. */
};
static GstVideoFormat
drm_to_gst_format(guint drm_fourcc)
{
for (const auto &item : format_map) {
if (item.drm_fourcc == drm_fourcc)
return item.gst_format;
}
return GST_VIDEO_FORMAT_UNKNOWN;
}
static GstStructure *
bare_structure_from_fourcc(guint fourcc)
{
GstVideoFormat gst_format = drm_to_gst_format(fourcc);
if (gst_format == GST_VIDEO_FORMAT_UNKNOWN)
return nullptr;
if (gst_format != GST_VIDEO_FORMAT_ENCODED)
return gst_structure_new("video/x-raw", "format", G_TYPE_STRING,
gst_video_format_to_string(gst_format), nullptr);
switch (fourcc) {
case DRM_FORMAT_MJPEG:
return gst_structure_new_empty("image/jpeg");
default:
return nullptr;
}
}
GstCaps *
gst_libcamera_stream_formats_to_caps(const StreamFormats &formats)
{
GstCaps *caps = gst_caps_new_empty();
for (unsigned int fourcc : formats.pixelformats()) {
g_autoptr(GstStructure) bare_s = bare_structure_from_fourcc(fourcc);
if (!bare_s) {
GST_WARNING("Unsupported DRM format %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS(fourcc));
continue;
}
for (const Size &size : formats.sizes(fourcc)) {
GstStructure *s = gst_structure_copy(bare_s);
gst_structure_set(s,
"width", G_TYPE_INT, size.width,
"height", G_TYPE_INT, size.height,
nullptr);
gst_caps_append_structure(caps, s);
}
const SizeRange &range = formats.range(fourcc);
if (range.hStep && range.vStep) {
GstStructure *s = gst_structure_copy(bare_s);
GValue val = G_VALUE_INIT;
g_value_init(&val, GST_TYPE_INT_RANGE);
gst_value_set_int_range_step(&val, range.min.width, range.max.width, range.hStep);
gst_structure_set_value(s, "width", &val);
gst_value_set_int_range_step(&val, range.min.height, range.max.height, range.vStep);
gst_structure_set_value(s, "height", &val);
g_value_unset(&val);
gst_caps_append_structure(caps, s);
}
}
return caps;
}
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