Commit 2a870d7d authored by Benjamin Gaignard's avatar Benjamin Gaignard Committed by Nicolas Dufresne

v4l2videodec: Create one element per device

For each videoCdevice probe it input/output capabilities
if it match with video decoder requirement register a new element.
Signed-off-by: Benjamin Gaignard's avatarBenjamin Gaignard <benjamin.gaignard@linaro.org>

https://bugzilla.gnome.org/show_bug.cgi?id=722128
parent bd51c371
......@@ -52,8 +52,7 @@ plugin_init (GstPlugin * plugin)
GST_TYPE_V4L2SINK) ||
!gst_element_register (plugin, "v4l2radio", GST_RANK_NONE,
GST_TYPE_V4L2RADIO) ||
!gst_element_register (plugin, "v4l2videodec", GST_RANK_PRIMARY + 1,
GST_TYPE_V4L2_VIDEO_DEC) ||
!gst_v4l2_video_dec_register (plugin) ||
/* !gst_element_register (plugin, "v4l2jpegsrc", */
/* GST_RANK_NONE, GST_TYPE_V4L2JPEGSRC) || */
/* !gst_element_register (plugin, "v4l2mjpegsrc", */
......
......@@ -1457,7 +1457,7 @@ gst_v4l2_object_v4l2fourcc_to_video_format (guint32 fourcc)
return format;
}
static GstStructure *
GstStructure *
gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc)
{
GstStructure *structure = NULL;
......
......@@ -283,6 +283,8 @@ gboolean gst_v4l2_object_setup_format (GstV4l2Object * v4l2object,
gboolean gst_v4l2_object_decide_allocation (GstV4l2Object * v4l2object,
GstQuery * query);
GstStructure * gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc);
#define GST_IMPLEMENT_V4L2_PROBE_METHODS(Type_Class, interface_as_function) \
\
......
......@@ -23,22 +23,35 @@
#include "config.h"
#endif
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include "gstv4l2videodec.h"
#include "v4l2_calls.h"
#include <string.h>
#include <gst/gst-i18n-plugin.h>
#define DEFAULT_PROP_DEVICE "/dev/video8"
#define DEFAULT_PROP_DEVICE "/dev/video0"
#define V4L2_VIDEO_DEC_QUARK \
g_quark_from_static_string("gst-v4l2-video-dec-info")
GST_DEBUG_CATEGORY_STATIC (gst_v4l2_video_dec_debug);
#define GST_CAT_DEFAULT gst_v4l2_video_dec_debug
#define parent_class gst_v4l2_video_dec_parent_class
G_DEFINE_TYPE (GstV4l2VideoDec, gst_v4l2_video_dec, GST_TYPE_VIDEO_DECODER);
static gboolean gst_v4l2_video_dec_flush (GstVideoDecoder * decoder);
typedef struct
{
gchar *device;
GstCaps *sink_caps;
GstCaps *src_caps;
} Gstv4l2VideoDecQData;
enum
{
PROP_0,
......@@ -46,6 +59,40 @@ enum
PROP_CAPTURE_IO_MODE,
};
static void gst_v4l2_video_dec_class_init (GstV4l2VideoDecClass * klass);
static void gst_v4l2_video_dec_init (GstV4l2VideoDec * self, gpointer g_class);
static void gst_v4l2_video_dec_base_init (gpointer g_class);
static GstVideoDecoderClass *parent_class = NULL;
GType
gst_v4l2_video_dec_get_type (void)
{
static volatile gsize type = 0;
if (g_once_init_enter (&type)) {
GType _type;
static const GTypeInfo info = {
sizeof (GstV4l2VideoDecClass),
gst_v4l2_video_dec_base_init,
NULL,
(GClassInitFunc) gst_v4l2_video_dec_class_init,
NULL,
NULL,
sizeof (GstV4l2VideoDec),
0,
(GInstanceInitFunc) gst_v4l2_video_dec_init,
NULL
};
_type = g_type_register_static (GST_TYPE_VIDEO_DECODER, "GstV4l2VideoDec",
&info, 0);
g_once_init_leave (&type, _type);
}
return type;
}
static void
gst_v4l2_video_dec_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
......@@ -432,8 +479,8 @@ gst_v4l2_video_dec_handle_frame (GstVideoDecoder * decoder,
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
gst_v4l2_object_unlock_stop (self->v4l2output);
ret =
gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL (self->v4l2output->
pool), codec_data);
gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL (self->
v4l2output->pool), codec_data);
gst_v4l2_object_unlock (self->v4l2output);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
......@@ -664,25 +711,52 @@ gst_v4l2_video_dec_finalize (GObject * object)
}
static void
gst_v4l2_video_dec_init (GstV4l2VideoDec * self)
gst_v4l2_video_dec_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
Gstv4l2VideoDecQData *qdata;
GstPadTemplate *templ;
qdata = g_type_get_qdata (G_TYPE_FROM_CLASS (g_class), V4L2_VIDEO_DEC_QUARK);
if (!qdata)
return;
templ =
gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
qdata->sink_caps);
gst_element_class_add_pad_template (element_class, templ);
templ =
gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
qdata->src_caps);
gst_element_class_add_pad_template (element_class, templ);
}
static void
gst_v4l2_video_dec_init (GstV4l2VideoDec * self, gpointer g_class)
{
GstVideoDecoder *decoder = (GstVideoDecoder *) self;
Gstv4l2VideoDecQData *qdata;
qdata = g_type_get_qdata (G_TYPE_FROM_CLASS (g_class), V4L2_VIDEO_DEC_QUARK);
if (!qdata)
return;
gst_video_decoder_set_packetized (decoder, TRUE);
self->v4l2output = gst_v4l2_object_new (GST_ELEMENT (self),
V4L2_BUF_TYPE_VIDEO_OUTPUT, DEFAULT_PROP_DEVICE,
V4L2_BUF_TYPE_VIDEO_OUTPUT, qdata->device,
gst_v4l2_get_output, gst_v4l2_set_output, NULL);
self->v4l2output->no_initial_format = TRUE;
self->v4l2output->keep_aspect = FALSE;
self->v4l2capture = gst_v4l2_object_new (GST_ELEMENT (self),
V4L2_BUF_TYPE_VIDEO_CAPTURE, DEFAULT_PROP_DEVICE,
V4L2_BUF_TYPE_VIDEO_CAPTURE, qdata->device,
gst_v4l2_get_input, gst_v4l2_set_input, NULL);
self->v4l2capture->no_initial_format = TRUE;
self->v4l2output->keep_aspect = FALSE;
g_object_set (self, "device", DEFAULT_PROP_DEVICE, NULL);
g_object_set (self, "device", qdata->device, NULL);
}
static void
......@@ -692,18 +766,12 @@ gst_v4l2_video_dec_class_init (GstV4l2VideoDecClass * klass)
GObjectClass *gobject_class;
GstVideoDecoderClass *video_decoder_class;
parent_class = g_type_class_peek_parent (klass);
element_class = (GstElementClass *) klass;
gobject_class = (GObjectClass *) klass;
video_decoder_class = (GstVideoDecoderClass *) klass;
gst_element_class_add_pad_template (element_class,
gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
gst_v4l2_object_get_codec_caps ()));
gst_element_class_add_pad_template (element_class,
gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_v4l2_object_get_raw_caps ()));
gst_element_class_set_static_metadata (element_class,
"V4L2 Video Decoder",
"Codec/Decoder/Video",
......@@ -742,7 +810,6 @@ gst_v4l2_video_dec_class_init (GstV4l2VideoDecClass * klass)
element_class->change_state =
GST_DEBUG_FUNCPTR (gst_v4l2_video_dec_change_state);
gst_v4l2_object_install_properties_helper (gobject_class,
DEFAULT_PROP_DEVICE);
......@@ -756,7 +823,121 @@ gst_v4l2_video_dec_class_init (GstV4l2VideoDecClass * klass)
"Capture I/O mode",
GST_TYPE_V4L2_IO_MODE, GST_V4L2_IO_AUTO,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
/* Probing functions */
static GstCaps *
gst_v4l2_video_dec_probe_caps (gchar * device, gint video_fd,
enum v4l2_buf_type type, GstCaps * filter)
{
gint n;
struct v4l2_fmtdesc format;
GstCaps *ret, *caps;
GST_DEBUG ("Getting %s format enumerations", device);
caps = gst_caps_new_empty ();
for (n = 0;; n++) {
GstStructure *template;
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);
return ret;
}
gboolean
gst_v4l2_video_dec_register (GstPlugin * plugin)
{
gint i = -1;
gchar *device = NULL;
GST_DEBUG_CATEGORY_INIT (gst_v4l2_video_dec_debug, "v4l2videodec", 0,
"V4L2 Video Decoder");
while (TRUE) {
GstCaps *src_caps, *sink_caps;
gint video_fd;
g_free (device);
device = g_strdup_printf ("/dev/video%d", ++i);
if (!g_file_test (device, G_FILE_TEST_EXISTS))
break;
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;
Gstv4l2VideoDecQData *qdata;
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_name = g_strdup_printf ("v4l2video%ddec", i);
subtype = g_type_register_static (type, type_name, &type_info, 0);
qdata = g_new0 (Gstv4l2VideoDecQData, 1);
qdata->device = g_strdup (device);
qdata->sink_caps = gst_caps_ref (sink_caps);
qdata->src_caps = gst_caps_ref (src_caps);
g_type_set_qdata (subtype, V4L2_VIDEO_DEC_QUARK, qdata);
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);
return TRUE;
}
......@@ -76,6 +76,8 @@ struct _GstV4l2VideoDecClass
GType gst_v4l2_video_dec_get_type (void);
gboolean gst_v4l2_video_dec_register (GstPlugin * plugin);
G_END_DECLS
#endif /* __GST_V4L2_VIDEO_DEC_H__ */
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