gstreamer/subprojects/gst-plugins-bad/sys/uvch264/uvc_h264.c

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2012-09-10 20:09:26 +00:00
/*
* GStreamer
*
* Copyright (C) 2012 Cisco Systems, Inc.
* Author: Youness Alaoui <youness.alaoui@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
2012-09-10 20:09:26 +00:00
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "uvc_h264.h"
GType
uvc_h264_slicemode_get_type (void)
{
static GType type = 0;
static const GEnumValue types[] = {
{UVC_H264_SLICEMODE_IGNORED, "Ignored", "ignored"},
{UVC_H264_SLICEMODE_BITSPERSLICE, "Bits per slice", "bits/slice"},
{UVC_H264_SLICEMODE_MBSPERSLICE, "MBs per Slice", "MBs/slice"},
{UVC_H264_SLICEMODE_SLICEPERFRAME, "Slice Per Frame", "slice/frame"},
{0, NULL, NULL}
};
if (!type) {
type = g_enum_register_static ("UvcH264SliceMode", types);
}
return type;
}
GType
uvc_h264_usagetype_get_type (void)
{
static GType type = 0;
static const GEnumValue types[] = {
{UVC_H264_USAGETYPE_REALTIME, "Realtime (video conferencing)", "realtime"},
{UVC_H264_USAGETYPE_BROADCAST, "Broadcast", "broadcast"},
{UVC_H264_USAGETYPE_STORAGE, "Storage", "storage"},
{UVC_H264_USAGETYPE_UCCONFIG_0, "UCConfig 0", "ucconfig0"},
{UVC_H264_USAGETYPE_UCCONFIG_1, "UCConfig 1", "ucconfig1"},
{UVC_H264_USAGETYPE_UCCONFIG_2Q, "UCConfig 2Q", "ucconfig2q"},
{UVC_H264_USAGETYPE_UCCONFIG_2S, "UCConfig 2S", "ucconfig2s"},
{UVC_H264_USAGETYPE_UCCONFIG_3, "UCConfig 3", "ucconfig3"},
{0, NULL, NULL}
};
if (!type) {
type = g_enum_register_static ("UvcH264UsageType", types);
}
return type;
}
GType
uvc_h264_ratecontrol_get_type (void)
{
static GType type = 0;
static const GEnumValue types[] = {
{UVC_H264_RATECONTROL_CBR, "Constant bit rate", "cbr"},
{UVC_H264_RATECONTROL_VBR, "Variable bit rate", "vbr"},
{UVC_H264_RATECONTROL_CONST_QP, "Constant QP", "qp"},
{0, NULL, NULL}
};
if (!type) {
type = g_enum_register_static ("UvcH264RateControl", types);
}
return type;
}
GType
uvc_h264_streamformat_get_type (void)
{
static GType type = 0;
static const GEnumValue types[] = {
{UVC_H264_STREAMFORMAT_ANNEXB, "Byte stream format (Annex B)", "byte"},
{UVC_H264_STREAMFORMAT_NAL, "NAL stream format", "nal"},
{0, NULL, NULL}
};
if (!type) {
type = g_enum_register_static ("UvcH264StreamFormat", types);
}
return type;
}
GType
uvc_h264_entropy_get_type (void)
{
static GType type = 0;
static const GEnumValue types[] = {
{UVC_H264_ENTROPY_CAVLC, "CAVLC", "cavlc"},
{UVC_H264_ENTROPY_CABAC, "CABAC", "cabac"},
{0, NULL, NULL}
};
if (!type) {
type = g_enum_register_static ("UvcH264Entropy", types);
}
return type;
}
guint8
xu_get_id (GstObject * self, const gchar * devicename,
libusb_context ** usb_ctx)
{
static const __u8 guid[16] = GUID_UVCX_H264_XU;
GUdevClient *client;
GUdevDevice *udevice;
GUdevDevice *parent;
guint64 busnum;
guint64 devnum;
libusb_device **device_list = NULL;
libusb_device *device = NULL;
ssize_t cnt;
int i, j, k;
if (*usb_ctx == NULL)
libusb_init (usb_ctx);
client = g_udev_client_new (NULL);
if (client) {
udevice = g_udev_client_query_by_device_file (client, devicename);
if (udevice) {
parent = g_udev_device_get_parent_with_subsystem (udevice, "usb",
"usb_device");
if (parent) {
busnum = g_udev_device_get_sysfs_attr_as_uint64 (parent, "busnum");
devnum = g_udev_device_get_sysfs_attr_as_uint64 (parent, "devnum");
cnt = libusb_get_device_list (*usb_ctx, &device_list);
for (i = 0; i < cnt; i++) {
if (busnum == libusb_get_bus_number (device_list[i]) &&
devnum == libusb_get_device_address (device_list[i])) {
device = libusb_ref_device (device_list[i]);
break;
}
}
libusb_free_device_list (device_list, 1);
g_object_unref (parent);
}
g_object_unref (udevice);
}
g_object_unref (client);
}
if (device) {
struct libusb_device_descriptor desc;
if (libusb_get_device_descriptor (device, &desc) == 0) {
for (i = 0; i < desc.bNumConfigurations; ++i) {
struct libusb_config_descriptor *config = NULL;
if (libusb_get_config_descriptor (device, i, &config) == 0) {
for (j = 0; j < config->bNumInterfaces; j++) {
for (k = 0; k < config->interface[j].num_altsetting; k++) {
const struct libusb_interface_descriptor *interface;
const guint8 *ptr = NULL;
interface = &config->interface[j].altsetting[k];
if (interface->bInterfaceClass != LIBUSB_CLASS_VIDEO ||
interface->bInterfaceSubClass != USB_VIDEO_CONTROL)
continue;
ptr = interface->extra;
while (ptr - interface->extra +
sizeof (xu_descriptor) < interface->extra_length) {
xu_descriptor *desc = (xu_descriptor *) ptr;
GST_DEBUG_OBJECT (self, "Found VideoControl interface with "
"unit id %d : %" GUID_FORMAT, desc->bUnitID,
GUID_ARGS (desc->guidExtensionCode));
if (desc->bDescriptorType == USB_VIDEO_CONTROL_INTERFACE &&
desc->bDescriptorSubType == USB_VIDEO_CONTROL_XU_TYPE &&
memcmp (desc->guidExtensionCode, guid, 16) == 0) {
guint8 unit_id = desc->bUnitID;
GST_DEBUG_OBJECT (self, "Found H264 XU unit : %d", unit_id);
libusb_free_config_descriptor (config);
libusb_unref_device (device);
return unit_id;
}
ptr += desc->bLength;
}
}
}
libusb_free_config_descriptor (config);
}
}
}
libusb_unref_device (device);
}
return 0;
}