@@ -42,6 +42,18 @@ drm_to_gst_format(guint drm_fourcc)
return GST_VIDEO_FORMAT_UNKNOWN;
}
+static guint
+gst_format_to_drm(GstVideoFormat gst_format)
+{
+ if (gst_format == GST_VIDEO_FORMAT_ENCODED)
+ return DRM_FORMAT_INVALID;
+
+ for (const auto &item : format_map)
+ if (item.gst_format == gst_format)
+ return item.drm_fourcc;
+ return DRM_FORMAT_INVALID;
+}
+
static GstStructure *
bare_structure_from_fourcc(guint fourcc)
{
@@ -103,3 +115,55 @@ gst_libcamera_stream_formats_to_caps(const StreamFormats &formats)
return caps;
}
+
+GstCaps *
+gst_libcamera_stream_configuration_to_caps(const StreamConfiguration &stream_cfg)
+{
+ GstCaps *caps = gst_caps_new_empty();
+ GstStructure *s = bare_structure_from_fourcc(stream_cfg.pixelFormat);
+
+ gst_structure_set(s,
+ "width", G_TYPE_INT, stream_cfg.size.width,
+ "height", G_TYPE_INT, stream_cfg.size.height,
+ nullptr);
+ gst_caps_append_structure(caps, s);
+
+ return caps;
+}
+
+void
+gst_libcamera_configure_stream_from_caps(StreamConfiguration &stream_cfg,
+ GstCaps *caps)
+{
+ GstVideoFormat gst_format = drm_to_gst_format(stream_cfg.pixelFormat);
+
+ /* First fixate the caps using default configuration value. */
+ g_assert(gst_caps_is_writable(caps));
+ caps = gst_caps_truncate(caps);
+ GstStructure *s = gst_caps_get_structure(caps, 0);
+
+ gst_structure_fixate_field_nearest_int(s, "width", stream_cfg.size.width);
+ gst_structure_fixate_field_nearest_int(s, "height", stream_cfg.size.height);
+
+ if (gst_structure_has_name(s, "video/x-raw")) {
+ const gchar *format = gst_video_format_to_string(gst_format);
+ gst_structure_fixate_field_string(s, "format", format);
+ }
+
+ /* Then configure the stream with the result. */
+ if (gst_structure_has_name(s, "video/x-raw")) {
+ const gchar *format = gst_structure_get_string(s, "format");
+ gst_format = gst_video_format_from_string(format);
+ stream_cfg.pixelFormat = gst_format_to_drm(gst_format);
+ } else if (gst_structure_has_name(s, "image/jpeg")) {
+ stream_cfg.pixelFormat = DRM_FORMAT_MJPEG;
+ } else {
+ g_critical("Unsupported media type: %s", gst_structure_get_name(s));
+ }
+
+ gint width, height;
+ gst_structure_get_int(s, "width", &width);
+ gst_structure_get_int(s, "height", &height);
+ stream_cfg.size.width = width;
+ stream_cfg.size.height = height;
+}
@@ -15,6 +15,9 @@
#include <libcamera/stream.h>
GstCaps *gst_libcamera_stream_formats_to_caps(const libcamera::StreamFormats &formats);
+GstCaps *gst_libcamera_stream_configuration_to_caps(const libcamera::StreamConfiguration &stream_cfg);
+void gst_libcamera_configure_stream_from_caps(libcamera::StreamConfiguration &stream_cfg,
+ GstCaps *caps);
/**
* \class GLibLocker