mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-27 04:01:08 +00:00
v4l2: Use single pass iterator for M2M probe
Instead of having each M2M class do their own probing, use the GstV4l2Iterator and probe all devices in a single pass. https://bugzilla.gnome.org/show_bug.cgi?id=727925
This commit is contained in:
Nicolas Dufresne
parent
726fc3b524
commit
aa74871080
4 changed files with 198 additions and 109 deletions
|
|
@ -29,6 +29,15 @@
|
|||
|
||||
#include <gst/gst.h>
|
||||
|
||||
#include <fcntl.h>
|
||||
#include <string.h>
|
||||
#include <sys/stat.h>
|
||||
#include <sys/types.h>
|
||||
#include <unistd.h>
|
||||
|
||||
#include "ext/videodev2.h"
|
||||
#include "v4l2-utils.h"
|
||||
|
||||
#include "gstv4l2object.h"
|
||||
#include "gstv4l2src.h"
|
||||
#include "gstv4l2sink.h"
|
||||
|
|
@ -38,6 +47,124 @@
|
|||
|
||||
/* used in v4l2_calls.c and v4l2src_calls.c */
|
||||
GST_DEBUG_CATEGORY (v4l2_debug);
|
||||
#define GST_CAT_DEFAULT v4l2_debug
|
||||
|
||||
/* This is a minimalist probe, for speed, we only enumerate formats */
|
||||
static GstCaps *
|
||||
gst_v4l2_probe_template_caps (const gchar * device, gint video_fd,
|
||||
enum v4l2_buf_type type)
|
||||
{
|
||||
gint n;
|
||||
struct v4l2_fmtdesc format;
|
||||
GstCaps *caps;
|
||||
|
||||
GST_DEBUG ("Getting %s format enumerations", device);
|
||||
caps = gst_caps_new_empty ();
|
||||
|
||||
for (n = 0;; n++) {
|
||||
GstStructure *template;
|
||||
|
||||
memset (&format, 0, sizeof (format));
|
||||
|
||||
format.index = n;
|
||||
format.type = type;
|
||||
|
||||
if (ioctl (video_fd, VIDIOC_ENUM_FMT, &format) < 0)
|
||||
break; /* end of enumeration */
|
||||
|
||||
GST_LOG ("index: %u", format.index);
|
||||
GST_LOG ("type: %d", format.type);
|
||||
GST_LOG ("flags: %08x", format.flags);
|
||||
GST_LOG ("description: '%s'", format.description);
|
||||
GST_LOG ("pixelformat: %" GST_FOURCC_FORMAT,
|
||||
GST_FOURCC_ARGS (format.pixelformat));
|
||||
|
||||
template = gst_v4l2_object_v4l2fourcc_to_structure (format.pixelformat);
|
||||
|
||||
if (template)
|
||||
gst_caps_append_structure (caps, template);
|
||||
}
|
||||
|
||||
return gst_caps_simplify (caps);
|
||||
}
|
||||
|
||||
static gboolean
|
||||
gst_v4l2_probe_and_register (GstPlugin * plugin)
|
||||
{
|
||||
GstV4l2Iterator *it;
|
||||
gint video_fd = -1;
|
||||
struct v4l2_capability vcap;
|
||||
gboolean ret = TRUE;
|
||||
|
||||
it = gst_v4l2_iterator_new ();
|
||||
|
||||
while (gst_v4l2_iterator_next (it)) {
|
||||
GstCaps *src_caps, *sink_caps;
|
||||
gchar *basename;
|
||||
|
||||
if (video_fd > 0)
|
||||
close (video_fd);
|
||||
|
||||
video_fd = open (it->device_path, O_RDWR);
|
||||
if (video_fd == -1) {
|
||||
GST_DEBUG ("Failed to open %s: %s", it->device_path, g_strerror (errno));
|
||||
continue;
|
||||
}
|
||||
|
||||
memset (&vcap, 0, sizeof (vcap));
|
||||
|
||||
if (ioctl (video_fd, VIDIOC_QUERYCAP, &vcap) < 0) {
|
||||
GST_DEBUG ("Failed to get device capabilities: %s", g_strerror (errno));
|
||||
continue;
|
||||
}
|
||||
|
||||
if (!((vcap.capabilities & (V4L2_CAP_VIDEO_M2M |
|
||||
V4L2_CAP_VIDEO_M2M_MPLANE)) ||
|
||||
/* But legacy driver may expose both CAPTURE and OUTPUT */
|
||||
((vcap.capabilities &
|
||||
(V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_CAPTURE_MPLANE)) &&
|
||||
(vcap.capabilities &
|
||||
(V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_VIDEO_OUTPUT_MPLANE)))))
|
||||
continue;
|
||||
|
||||
GST_DEBUG ("Probing '%s' located at '%s'",
|
||||
it->device_name ? it->device_name : (const gchar *) vcap.driver,
|
||||
it->device_path);
|
||||
|
||||
/* get sink supported format (no MPLANE for codec) */
|
||||
sink_caps = gst_caps_merge (gst_v4l2_probe_template_caps (it->device_path,
|
||||
video_fd, V4L2_BUF_TYPE_VIDEO_OUTPUT),
|
||||
gst_v4l2_probe_template_caps (it->device_path, video_fd,
|
||||
V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE));
|
||||
|
||||
/* get src supported format */
|
||||
src_caps = gst_caps_merge (gst_v4l2_probe_template_caps (it->device_path,
|
||||
video_fd, V4L2_BUF_TYPE_VIDEO_CAPTURE),
|
||||
gst_v4l2_probe_template_caps (it->device_path, video_fd,
|
||||
V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE));
|
||||
|
||||
basename = g_path_get_basename (it->device_path);
|
||||
|
||||
if (gst_v4l2_is_video_dec (sink_caps, src_caps))
|
||||
ret = gst_v4l2_video_dec_register (plugin, basename, it->device_path,
|
||||
sink_caps, src_caps);
|
||||
/* else if ( ... etc. */
|
||||
|
||||
gst_caps_unref (sink_caps);
|
||||
gst_caps_unref (src_caps);
|
||||
g_free (basename);
|
||||
|
||||
if (!ret)
|
||||
break;
|
||||
}
|
||||
|
||||
if (video_fd > 0)
|
||||
close (video_fd);
|
||||
|
||||
gst_v4l2_iterator_free (it);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
plugin_init (GstPlugin * plugin)
|
||||
|
|
@ -50,11 +177,10 @@ plugin_init (GstPlugin * plugin)
|
|||
GST_TYPE_V4L2SINK) ||
|
||||
!gst_element_register (plugin, "v4l2radio", GST_RANK_NONE,
|
||||
GST_TYPE_V4L2RADIO) ||
|
||||
!gst_v4l2_video_dec_register (plugin) ||
|
||||
!gst_device_monitor_register (plugin, "v4l2monitor",
|
||||
GST_RANK_PRIMARY, GST_TYPE_V4L2_DEVICE_MONITOR) ||
|
||||
/* etc. */
|
||||
FALSE)
|
||||
!gst_v4l2_probe_and_register (plugin))
|
||||
return FALSE;
|
||||
|
||||
#ifdef ENABLE_NLS
|
||||
|
|
|
|||
|
|
@ -1150,8 +1150,8 @@ gst_v4l2_object_v4l2fourcc_to_video_format (guint32 fourcc)
|
|||
return format;
|
||||
}
|
||||
|
||||
GstStructure *
|
||||
gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc)
|
||||
static GstStructure *
|
||||
gst_v4l2_object_v4l2fourcc_to_bare_struct (guint32 fourcc)
|
||||
{
|
||||
GstStructure *structure = NULL;
|
||||
|
||||
|
|
@ -1258,6 +1258,34 @@ gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc)
|
|||
return structure;
|
||||
}
|
||||
|
||||
GstStructure *
|
||||
gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc)
|
||||
{
|
||||
GstStructure *template;
|
||||
gint i;
|
||||
|
||||
template = gst_v4l2_object_v4l2fourcc_to_bare_struct (fourcc);
|
||||
|
||||
if (template == NULL)
|
||||
goto done;
|
||||
|
||||
for (i = 0; i < GST_V4L2_FORMAT_COUNT; i++) {
|
||||
if (gst_v4l2_formats[i].format != fourcc)
|
||||
continue;
|
||||
|
||||
if (gst_v4l2_formats[i].dimensions) {
|
||||
gst_structure_set (template,
|
||||
"width", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
|
||||
"height", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
|
||||
"framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 100, 1, NULL);
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
done:
|
||||
return template;
|
||||
}
|
||||
|
||||
|
||||
static GstCaps *
|
||||
gst_v4l2_object_get_caps_helper (GstV4L2FormatFlags flags)
|
||||
|
|
@ -1273,7 +1301,7 @@ gst_v4l2_object_get_caps_helper (GstV4L2FormatFlags flags)
|
|||
continue;
|
||||
|
||||
structure =
|
||||
gst_v4l2_object_v4l2fourcc_to_structure (gst_v4l2_formats[i].format);
|
||||
gst_v4l2_object_v4l2fourcc_to_bare_struct (gst_v4l2_formats[i].format);
|
||||
if (structure) {
|
||||
if (gst_v4l2_formats[i].dimensions) {
|
||||
gst_structure_set (structure,
|
||||
|
|
@ -2873,7 +2901,8 @@ gst_v4l2_object_get_caps (GstV4l2Object * v4l2object, GstCaps * filter)
|
|||
|
||||
format = (struct v4l2_fmtdesc *) walk->data;
|
||||
|
||||
template = gst_v4l2_object_v4l2fourcc_to_structure (format->pixelformat);
|
||||
template =
|
||||
gst_v4l2_object_v4l2fourcc_to_bare_struct (format->pixelformat);
|
||||
|
||||
if (template) {
|
||||
GstCaps *tmp;
|
||||
|
|
|
|||
|
|
@ -720,6 +720,9 @@ gst_v4l2_video_dec_class_init (GstV4l2VideoDecClass * klass)
|
|||
gobject_class = (GObjectClass *) klass;
|
||||
video_decoder_class = (GstVideoDecoderClass *) klass;
|
||||
|
||||
GST_DEBUG_CATEGORY_INIT (gst_v4l2_video_dec_debug, "v4l2videodec", 0,
|
||||
"V4L2 Video Decoder");
|
||||
|
||||
gst_element_class_set_static_metadata (element_class,
|
||||
"V4L2 Video Decoder",
|
||||
"Codec/Decoder/Video",
|
||||
|
|
@ -794,121 +797,48 @@ gst_v4l2_video_dec_subclass_init (gpointer g_class, gpointer data)
|
|||
}
|
||||
|
||||
/* Probing functions */
|
||||
static GstCaps *
|
||||
gst_v4l2_video_dec_probe_caps (gchar * device, gint video_fd,
|
||||
enum v4l2_buf_type type, GstCaps * filter)
|
||||
gboolean
|
||||
gst_v4l2_is_video_dec (GstCaps * sink_caps, GstCaps * src_caps)
|
||||
{
|
||||
gint n;
|
||||
struct v4l2_fmtdesc format;
|
||||
GstCaps *ret, *caps;
|
||||
gboolean ret = FALSE;
|
||||
|
||||
GST_DEBUG ("Getting %s format enumerations", device);
|
||||
caps = gst_caps_new_empty ();
|
||||
|
||||
for (n = 0;; n++) {
|
||||
GstStructure *template;
|
||||
|
||||
memset (&format, 0, sizeof (format));
|
||||
|
||||
format.index = n;
|
||||
format.type = type;
|
||||
|
||||
if (v4l2_ioctl (video_fd, VIDIOC_ENUM_FMT, &format) < 0)
|
||||
break; /* end of enumeration */
|
||||
|
||||
GST_LOG ("index: %u", format.index);
|
||||
GST_LOG ("type: %d", format.type);
|
||||
GST_LOG ("flags: %08x", format.flags);
|
||||
GST_LOG ("description: '%s'", format.description);
|
||||
GST_LOG ("pixelformat: %" GST_FOURCC_FORMAT,
|
||||
GST_FOURCC_ARGS (format.pixelformat));
|
||||
|
||||
template = gst_v4l2_object_v4l2fourcc_to_structure (format.pixelformat);
|
||||
|
||||
if (template)
|
||||
gst_caps_append_structure (caps, template);
|
||||
}
|
||||
|
||||
caps = gst_caps_simplify (caps);
|
||||
|
||||
ret = gst_caps_intersect (filter, caps);
|
||||
gst_caps_unref (filter);
|
||||
gst_caps_unref (caps);
|
||||
if (gst_caps_is_subset (sink_caps, gst_v4l2_object_get_codec_caps ())
|
||||
&& gst_caps_is_subset (src_caps, gst_v4l2_object_get_raw_caps ()))
|
||||
ret = TRUE;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
gboolean
|
||||
gst_v4l2_video_dec_register (GstPlugin * plugin)
|
||||
gst_v4l2_video_dec_register (GstPlugin * plugin, const gchar * basename,
|
||||
const gchar * device_path, GstCaps * sink_caps, GstCaps * src_caps)
|
||||
{
|
||||
gint i = -1;
|
||||
gchar *device = NULL;
|
||||
GTypeQuery type_query;
|
||||
GTypeInfo type_info = { 0, };
|
||||
GType type, subtype;
|
||||
gchar *type_name;
|
||||
GstV4l2VideoDecCData *cdata;
|
||||
|
||||
GST_DEBUG_CATEGORY_INIT (gst_v4l2_video_dec_debug, "v4l2videodec", 0,
|
||||
"V4L2 Video Decoder");
|
||||
cdata = g_new0 (GstV4l2VideoDecCData, 1);
|
||||
cdata->device = g_strdup (device_path);
|
||||
cdata->sink_caps = gst_caps_ref (sink_caps);
|
||||
cdata->src_caps = gst_caps_ref (src_caps);
|
||||
|
||||
while (TRUE) {
|
||||
GstCaps *src_caps, *sink_caps;
|
||||
gint video_fd;
|
||||
type = gst_v4l2_video_dec_get_type ();
|
||||
g_type_query (type, &type_query);
|
||||
memset (&type_info, 0, sizeof (type_info));
|
||||
type_info.class_size = type_query.class_size;
|
||||
type_info.instance_size = type_query.instance_size;
|
||||
type_info.class_init = gst_v4l2_video_dec_subclass_init;
|
||||
type_info.class_data = cdata;
|
||||
type_info.instance_init = gst_v4l2_video_dec_subinstance_init;
|
||||
|
||||
g_free (device);
|
||||
device = g_strdup_printf ("/dev/video%d", ++i);
|
||||
type_name = g_strdup_printf ("v4l2%sdec", basename);
|
||||
subtype = g_type_register_static (type, type_name, &type_info, 0);
|
||||
|
||||
if (!g_file_test (device, G_FILE_TEST_EXISTS))
|
||||
break;
|
||||
gst_element_register (plugin, type_name, GST_RANK_PRIMARY + 1, subtype);
|
||||
|
||||
video_fd = open (device, O_RDWR);
|
||||
if (video_fd == -1) {
|
||||
GST_WARNING ("Failed to open %s", device);
|
||||
continue;
|
||||
}
|
||||
|
||||
/* get sink supported format (no MPLANE for codec) */
|
||||
sink_caps = gst_v4l2_video_dec_probe_caps (device, video_fd,
|
||||
V4L2_BUF_TYPE_VIDEO_OUTPUT, gst_v4l2_object_get_codec_caps ());
|
||||
|
||||
/* get src supported format */
|
||||
src_caps = gst_caps_merge (gst_v4l2_video_dec_probe_caps (device, video_fd,
|
||||
V4L2_BUF_TYPE_VIDEO_CAPTURE, gst_v4l2_object_get_raw_caps ()),
|
||||
gst_v4l2_video_dec_probe_caps (device, video_fd,
|
||||
V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
|
||||
gst_v4l2_object_get_raw_caps ()));
|
||||
|
||||
if (!gst_caps_is_empty (sink_caps) && !gst_caps_is_empty (src_caps)) {
|
||||
GTypeQuery type_query;
|
||||
GTypeInfo type_info = { 0, };
|
||||
GType type, subtype;
|
||||
gchar *type_name;
|
||||
GstV4l2VideoDecCData *cdata;
|
||||
|
||||
cdata = g_new0 (GstV4l2VideoDecCData, 1);
|
||||
cdata->device = g_strdup (device);
|
||||
cdata->sink_caps = gst_caps_ref (sink_caps);
|
||||
cdata->src_caps = gst_caps_ref (src_caps);
|
||||
|
||||
type = gst_v4l2_video_dec_get_type ();
|
||||
g_type_query (type, &type_query);
|
||||
memset (&type_info, 0, sizeof (type_info));
|
||||
type_info.class_size = type_query.class_size;
|
||||
type_info.instance_size = type_query.instance_size;
|
||||
type_info.class_init = gst_v4l2_video_dec_subclass_init;
|
||||
type_info.class_data = cdata;
|
||||
type_info.instance_init = gst_v4l2_video_dec_subinstance_init;
|
||||
|
||||
type_name = g_strdup_printf ("v4l2video%ddec", i);
|
||||
subtype = g_type_register_static (type, type_name, &type_info, 0);
|
||||
|
||||
gst_element_register (plugin, type_name, GST_RANK_PRIMARY + 1, subtype);
|
||||
|
||||
g_free (type_name);
|
||||
}
|
||||
|
||||
close (video_fd);
|
||||
gst_caps_unref (src_caps);
|
||||
gst_caps_unref (sink_caps);
|
||||
}
|
||||
|
||||
g_free (device);
|
||||
g_free (type_name);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -78,7 +78,11 @@ struct _GstV4l2VideoDecClass
|
|||
|
||||
GType gst_v4l2_video_dec_get_type (void);
|
||||
|
||||
gboolean gst_v4l2_video_dec_register (GstPlugin * plugin);
|
||||
gboolean gst_v4l2_is_video_dec (GstCaps * sink_caps, GstCaps * src_caps);
|
||||
gboolean gst_v4l2_video_dec_register (GstPlugin * plugin,
|
||||
const gchar *basename,
|
||||
const gchar *device_path,
|
||||
GstCaps * sink_caps, GstCaps * src_caps);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue