diff options
| -rw-r--r-- | src/gstreamer/gstlibcamera-utils.cpp | 105 | ||||
| -rw-r--r-- | src/gstreamer/gstlibcamera-utils.h | 19 | ||||
| -rw-r--r-- | src/gstreamer/meson.build | 1 |
3 files changed, 125 insertions, 0 deletions
diff --git a/src/gstreamer/gstlibcamera-utils.cpp b/src/gstreamer/gstlibcamera-utils.cpp new file mode 100644 index 00000000..386ec364 --- /dev/null +++ b/src/gstreamer/gstlibcamera-utils.cpp @@ -0,0 +1,105 @@ +/* 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; +} diff --git a/src/gstreamer/gstlibcamera-utils.h b/src/gstreamer/gstlibcamera-utils.h new file mode 100644 index 00000000..2e4e3042 --- /dev/null +++ b/src/gstreamer/gstlibcamera-utils.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* + * Copyright (C) 2020, Collabora Ltd. + * Author: Nicolas Dufresne <nicolas.dufresne@collabora.com> + * + * gstlibcamera-utils.h - GStreamer libcamera Utility Functions + */ + +#ifndef __GST_LIBCAMERA_UTILS_H__ +#define __GST_LIBCAMERA_UTILS_H__ + +#include <gst/gst.h> +#include <gst/video/video.h> + +#include <libcamera/stream.h> + +GstCaps *gst_libcamera_stream_formats_to_caps(const libcamera::StreamFormats &formats); + +#endif /* __GST_LIBCAMERA_UTILS_H__ */ diff --git a/src/gstreamer/meson.build b/src/gstreamer/meson.build index 490e030e..9b11a46f 100644 --- a/src/gstreamer/meson.build +++ b/src/gstreamer/meson.build @@ -1,4 +1,5 @@ libcamera_gst_sources = [ + 'gstlibcamera-utils.cpp', 'gstlibcamera.c', 'gstlibcamerasrc.cpp', ] |