mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-25 01:30:38 +00:00
uvch264: Factor out checking if v4l2device is uvc compatible
This commit is contained in:
Thibault Saunier
Thibault Saunier
parent
59d8e56e95
commit
2d3de7afa4
4 changed files with 140 additions and 131 deletions
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@ -22,8 +22,8 @@
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/**
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/**
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* SECTION:element-uvch264-src
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* SECTION:element-uvch264src
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* @title: uvch264-src
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* @title: uvch264src
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*
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*
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* A camera bin src element that wraps v4l2src and implements UVC H264
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* A camera bin src element that wraps v4l2src and implements UVC H264
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* Extension Units (XU) to control the H264 encoder in the camera
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* Extension Units (XU) to control the H264 encoder in the camera
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@ -35,39 +35,6 @@
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#include "gstuvch264_src.h"
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#include "gstuvch264_src.h"
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#include <gst/video/video.h>
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#include <linux/uvcvideo.h>
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#include <linux/usb/video.h>
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#include <sys/ioctl.h>
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#include <string.h>
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#include "gstuvch264_src.h"
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#include <gudev/gudev.h>
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#include <libusb.h>
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#ifndef LIBUSB_CLASS_VIDEO
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#define LIBUSB_CLASS_VIDEO 0x0e
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#endif
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typedef struct
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{
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int8_t bLength;
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int8_t bDescriptorType;
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int8_t bDescriptorSubType;
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int8_t bUnitID;
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uint8_t guidExtensionCode[16];
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} __attribute__ ((__packed__)) xu_descriptor;
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#define GUID_FORMAT "02X%02X%02X%02X-%02X%02X%02X%02X-"\
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"%02X%02X%02X%02X-%02X%02X%02X%02X"
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#define GUID_ARGS(guid) guid[0], guid[1], guid[2], guid[3], \
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guid[4], guid[5], guid[6], guid[7], \
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guid[8], guid[9], guid[10], guid[11], \
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guid[12], guid[13], guid[14], guid[15]
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#define USB_VIDEO_CONTROL 1
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#define USB_VIDEO_CONTROL_INTERFACE 0x24
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#define USB_VIDEO_CONTROL_XU_TYPE 0x06
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enum
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enum
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{
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{
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PROP_0,
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PROP_0,
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@ -174,6 +141,11 @@ G_DEFINE_TYPE (GstUvcH264Src, gst_uvc_h264_src, GST_TYPE_BASE_CAMERA_SRC);
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"alignment = (string) au, " \
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"alignment = (string) au, " \
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"profile = (string) { high, main, baseline, constrained-baseline }"
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"profile = (string) { high, main, baseline, constrained-baseline }"
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/**
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* GstUvcH264Src!vfsrc:
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*
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* The video src pad template
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*/
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static GstStaticPadTemplate vfsrc_template =
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static GstStaticPadTemplate vfsrc_template =
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GST_STATIC_PAD_TEMPLATE (GST_BASE_CAMERA_SRC_VIEWFINDER_PAD_NAME,
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GST_STATIC_PAD_TEMPLATE (GST_BASE_CAMERA_SRC_VIEWFINDER_PAD_NAME,
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GST_PAD_SRC,
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GST_PAD_SRC,
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@ -1794,100 +1766,6 @@ gst_uvc_h264_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
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return self->srcpad_event_func (pad, parent, event);
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return self->srcpad_event_func (pad, parent, event);
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}
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}
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static guint8
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xu_get_id (GstUvcH264Src * self)
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{
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static const __u8 guid[16] = GUID_UVCX_H264_XU;
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GUdevClient *client;
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GUdevDevice *udevice;
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GUdevDevice *parent;
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guint64 busnum;
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guint64 devnum;
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libusb_device **device_list = NULL;
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libusb_device *device = NULL;
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ssize_t cnt;
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int i, j, k;
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if (self->usb_ctx == NULL)
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libusb_init (&self->usb_ctx);
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client = g_udev_client_new (NULL);
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if (client) {
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udevice = g_udev_client_query_by_device_file (client, self->device);
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if (udevice) {
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parent = g_udev_device_get_parent_with_subsystem (udevice, "usb",
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"usb_device");
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if (parent) {
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busnum = g_udev_device_get_sysfs_attr_as_uint64 (parent, "busnum");
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devnum = g_udev_device_get_sysfs_attr_as_uint64 (parent, "devnum");
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cnt = libusb_get_device_list (self->usb_ctx, &device_list);
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for (i = 0; i < cnt; i++) {
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if (busnum == libusb_get_bus_number (device_list[i]) &&
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devnum == libusb_get_device_address (device_list[i])) {
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device = libusb_ref_device (device_list[i]);
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break;
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}
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}
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libusb_free_device_list (device_list, 1);
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g_object_unref (parent);
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}
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g_object_unref (udevice);
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}
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g_object_unref (client);
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}
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if (device) {
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struct libusb_device_descriptor desc;
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if (libusb_get_device_descriptor (device, &desc) == 0) {
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for (i = 0; i < desc.bNumConfigurations; ++i) {
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struct libusb_config_descriptor *config = NULL;
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if (libusb_get_config_descriptor (device, i, &config) == 0) {
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for (j = 0; j < config->bNumInterfaces; j++) {
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for (k = 0; k < config->interface[j].num_altsetting; k++) {
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const struct libusb_interface_descriptor *interface;
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const guint8 *ptr = NULL;
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interface = &config->interface[j].altsetting[k];
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if (interface->bInterfaceClass != LIBUSB_CLASS_VIDEO ||
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interface->bInterfaceSubClass != USB_VIDEO_CONTROL)
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continue;
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ptr = interface->extra;
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while (ptr - interface->extra +
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sizeof (xu_descriptor) < interface->extra_length) {
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xu_descriptor *desc = (xu_descriptor *) ptr;
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GST_DEBUG_OBJECT (self, "Found VideoControl interface with "
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"unit id %d : %" GUID_FORMAT, desc->bUnitID,
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GUID_ARGS (desc->guidExtensionCode));
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if (desc->bDescriptorType == USB_VIDEO_CONTROL_INTERFACE &&
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desc->bDescriptorSubType == USB_VIDEO_CONTROL_XU_TYPE &&
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memcmp (desc->guidExtensionCode, guid, 16) == 0) {
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guint8 unit_id = desc->bUnitID;
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GST_DEBUG_OBJECT (self, "Found H264 XU unit : %d", unit_id);
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libusb_free_config_descriptor (config);
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libusb_unref_device (device);
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return unit_id;
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}
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ptr += desc->bLength;
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}
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}
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}
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libusb_free_config_descriptor (config);
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}
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}
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}
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libusb_unref_device (device);
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}
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return 0;
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}
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static gboolean
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static gboolean
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xu_query (GstUvcH264Src * self, guint selector, guint query, guchar * data)
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xu_query (GstUvcH264Src * self, guint selector, guint query, guchar * data)
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{
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{
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@ -2530,7 +2408,8 @@ ensure_v4l2src (GstUvcH264Src * self)
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/* Set/Update the fd and unit id after we go to READY */
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/* Set/Update the fd and unit id after we go to READY */
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g_object_get (self->v4l2_src, "device-fd", &self->v4l2_fd, NULL);
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g_object_get (self->v4l2_src, "device-fd", &self->v4l2_fd, NULL);
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self->h264_unit_id = xu_get_id (self);
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self->h264_unit_id =
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xu_get_id (GST_OBJECT (self), self->device, &self->usb_ctx);
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if (self->h264_unit_id == 0) {
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if (self->h264_unit_id == 0) {
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GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
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GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS,
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@ -30,7 +30,6 @@
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#include <gst/gst.h>
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#include <gst/gst.h>
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#include <gst/basecamerabinsrc/gstbasecamerasrc.h>
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#include <gst/basecamerabinsrc/gstbasecamerasrc.h>
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#include <libusb.h>
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#include "uvc_h264.h"
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#include "uvc_h264.h"
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@ -120,3 +120,98 @@ uvc_h264_entropy_get_type (void)
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}
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}
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return type;
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return type;
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}
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}
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guint8
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xu_get_id (GstObject * self, const gchar * devicename,
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libusb_context ** usb_ctx)
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{
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static const __u8 guid[16] = GUID_UVCX_H264_XU;
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GUdevClient *client;
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GUdevDevice *udevice;
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GUdevDevice *parent;
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guint64 busnum;
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guint64 devnum;
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libusb_device **device_list = NULL;
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libusb_device *device = NULL;
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ssize_t cnt;
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int i, j, k;
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if (*usb_ctx == NULL)
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libusb_init (usb_ctx);
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client = g_udev_client_new (NULL);
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if (client) {
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udevice = g_udev_client_query_by_device_file (client, devicename);
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if (udevice) {
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parent = g_udev_device_get_parent_with_subsystem (udevice, "usb",
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"usb_device");
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if (parent) {
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busnum = g_udev_device_get_sysfs_attr_as_uint64 (parent, "busnum");
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devnum = g_udev_device_get_sysfs_attr_as_uint64 (parent, "devnum");
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cnt = libusb_get_device_list (*usb_ctx, &device_list);
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for (i = 0; i < cnt; i++) {
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if (busnum == libusb_get_bus_number (device_list[i]) &&
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devnum == libusb_get_device_address (device_list[i])) {
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device = libusb_ref_device (device_list[i]);
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break;
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}
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}
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libusb_free_device_list (device_list, 1);
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g_object_unref (parent);
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}
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g_object_unref (udevice);
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}
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g_object_unref (client);
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}
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if (device) {
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struct libusb_device_descriptor desc;
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if (libusb_get_device_descriptor (device, &desc) == 0) {
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for (i = 0; i < desc.bNumConfigurations; ++i) {
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struct libusb_config_descriptor *config = NULL;
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if (libusb_get_config_descriptor (device, i, &config) == 0) {
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for (j = 0; j < config->bNumInterfaces; j++) {
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for (k = 0; k < config->interface[j].num_altsetting; k++) {
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const struct libusb_interface_descriptor *interface;
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const guint8 *ptr = NULL;
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interface = &config->interface[j].altsetting[k];
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if (interface->bInterfaceClass != LIBUSB_CLASS_VIDEO ||
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interface->bInterfaceSubClass != USB_VIDEO_CONTROL)
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continue;
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ptr = interface->extra;
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while (ptr - interface->extra +
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sizeof (xu_descriptor) < interface->extra_length) {
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xu_descriptor *desc = (xu_descriptor *) ptr;
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GST_DEBUG_OBJECT (self, "Found VideoControl interface with "
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"unit id %d : %" GUID_FORMAT, desc->bUnitID,
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GUID_ARGS (desc->guidExtensionCode));
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if (desc->bDescriptorType == USB_VIDEO_CONTROL_INTERFACE &&
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desc->bDescriptorSubType == USB_VIDEO_CONTROL_XU_TYPE &&
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memcmp (desc->guidExtensionCode, guid, 16) == 0) {
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guint8 unit_id = desc->bUnitID;
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GST_DEBUG_OBJECT (self, "Found H264 XU unit : %d", unit_id);
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libusb_free_config_descriptor (config);
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libusb_unref_device (device);
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return unit_id;
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}
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ptr += desc->bLength;
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}
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}
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}
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libusb_free_config_descriptor (config);
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}
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}
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}
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libusb_unref_device (device);
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}
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return 0;
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}
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@ -33,6 +33,25 @@
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#include <glib.h>
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#include <glib.h>
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#include <glib-object.h>
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#include <glib-object.h>
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#include <gst/video/video.h>
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#include <linux/uvcvideo.h>
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#include <linux/usb/video.h>
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#include <sys/ioctl.h>
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#include <string.h>
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#include <gudev/gudev.h>
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#include <libusb.h>
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#include <gst/gst.h>
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#include <libusb.h>
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#define USB_VIDEO_CONTROL 1
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#define USB_VIDEO_CONTROL_INTERFACE 0x24
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#define USB_VIDEO_CONTROL_XU_TYPE 0x06
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#ifndef LIBUSB_CLASS_VIDEO
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#define LIBUSB_CLASS_VIDEO 0x0e
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#endif
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/* bmHints defines */
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/* bmHints defines */
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#define UVC_H264_BMHINTS_RESOLUTION (0x0001)
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#define UVC_H264_BMHINTS_RESOLUTION (0x0001)
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@ -323,6 +342,23 @@ typedef struct _uvcx_qp_steps_layers_t
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guint8 bMaxQp;
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guint8 bMaxQp;
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} __attribute__((packed)) uvcx_qp_steps_layers_t;
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} __attribute__((packed)) uvcx_qp_steps_layers_t;
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typedef struct
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{
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int8_t bLength;
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int8_t bDescriptorType;
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int8_t bDescriptorSubType;
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int8_t bUnitID;
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uint8_t guidExtensionCode[16];
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} __attribute__ ((__packed__)) xu_descriptor;
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#define GUID_FORMAT "02X%02X%02X%02X-%02X%02X%02X%02X-"\
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"%02X%02X%02X%02X-%02X%02X%02X%02X"
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#define GUID_ARGS(guid) guid[0], guid[1], guid[2], guid[3], \
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guid[4], guid[5], guid[6], guid[7], \
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guid[8], guid[9], guid[10], guid[11], \
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guid[12], guid[13], guid[14], guid[15]
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guint8 xu_get_id (GstObject *self, const gchar *devname, libusb_context **usb_ctx);
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#ifdef _WIN32
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#ifdef _WIN32
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// GUID of the UVC H.264 extension unit: {A29E7641-DE04-47E3-8B2B-F4341AFF003B}
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// GUID of the UVC H.264 extension unit: {A29E7641-DE04-47E3-8B2B-F4341AFF003B}
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