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klvinspect: add property to dump KLV data to a file

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This commit is contained in:
Joshua M. Doe 2021-02-24 15:15:03 -05:00
parent cc2a768303
commit 6166ddc3ed
2 changed files with 87 additions and 2 deletions
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82
gst/klv/gstklvinspect.c
View File

@ -43,12 +43,19 @@ GST_DEBUG_CATEGORY_STATIC (gst_klvinspect_debug_category);
#define GST_CAT_DEFAULT gst_klvinspect_debug_category
/* prototypes */
static void gst_klvinspect_dispose (GstKlvInspect * object);
static void gst_klvinspect_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_klvinspect_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstFlowReturn gst_klvinspect_transform_ip (GstBaseTransform * trans,
GstBuffer * buf);
enum
{
PROP_0
PROP_0,
PROP_DUMP_LOCATION
};
/* pad templates */
@ -68,6 +75,17 @@ gst_klvinspect_class_init (GstKlvInspectClass * klass)
{
GstBaseTransformClass *base_transform_class =
GST_BASE_TRANSFORM_CLASS (klass);
GObjectClass *gobject_class = (GObjectClass *) klass;
/* register GObject vmethods */
gobject_class->set_property = gst_klvinspect_set_property;
gobject_class->get_property = gst_klvinspect_get_property;
gobject_class->dispose = gst_klvinspect_dispose;
g_object_class_install_property (gobject_class, PROP_DUMP_LOCATION,
g_param_spec_string ("dump-location", "Dump filename",
"Location to dump KLV metadata", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/* Setting up pads and setting metadata should be moved to
base_class_init if you intend to subclass this class. */
@ -92,11 +110,59 @@ gst_klvinspect_class_init (GstKlvInspectClass * klass)
static void
gst_klvinspect_init (GstKlvInspect * filt)
{
filt->dump_location = NULL;
filt->dump_file = NULL;
}
static void
gst_klvinspect_dispose (GstKlvInspect * filt)
gst_klvinspect_dispose (GstKlvInspect * object)
{
GstKlvInspect *filt = GST_KLVINSPECT (object);
GST_DEBUG_OBJECT (filt, "disposing");
/* release all resources */
if (filt->dump_location)
g_free (filt->dump_location);
if (filt->dump_file)
fclose (filt->dump_file);
/* chain up to the parent class */
G_OBJECT_CLASS (gst_klvinspect_parent_class)->dispose (object);
}
static void
gst_klvinspect_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstKlvInspect *filt = GST_KLVINSPECT (object);
switch (prop_id) {
case PROP_DUMP_LOCATION:
if (filt->dump_location)
g_free (filt->dump_location);
filt->dump_location = g_strdup (g_value_get_string (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_klvinspect_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstKlvInspect *filt = GST_KLVINSPECT (object);
switch (prop_id) {
case PROP_DUMP_LOCATION:
g_value_set_string (value, filt->dump_location);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstFlowReturn
@ -107,6 +173,14 @@ gst_klvinspect_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
gpointer iter = NULL;
gint n_klv_meta_found = 0;
if (filt->dump_location && !filt->dump_file) {
GST_DEBUG_OBJECT (filt, "Opening file '%s' to dump KLV data",
filt->dump_location);
filt->dump_file = g_fopen (filt->dump_location, "wb");
if (!filt->dump_file)
GST_WARNING_OBJECT (filt, "Unable to open KLV dump file");
}
while ((klv_meta = (GstKLVMeta *) gst_buffer_iterate_meta_filtered (buf,
&iter, GST_KLV_META_API_TYPE))) {
gsize klv_size;
@ -115,6 +189,10 @@ gst_klvinspect_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
if (klv_data) {
GST_MEMDUMP_OBJECT (filt, "KLV data", klv_data, (guint) klv_size);
++n_klv_meta_found;
if (filt->dump_file) {
fwrite (klv_data, klv_size, 1, filt->dump_file);
}
}
}

7
gst/klv/gstklvinspect.h
View File

@ -20,6 +20,8 @@
#ifndef _GST_KLVINSPECT_H_
#define _GST_KLVINSPECT_H_
#include <stdio.h>
#include <gst/base/gstbasetransform.h>
G_BEGIN_DECLS
@ -36,6 +38,11 @@ typedef struct _GstKlvInspectClass GstKlvInspectClass;
struct _GstKlvInspect
{
GstBaseTransform base_klvinspect;
/* properties */
gchar* dump_location;
FILE* dump_file;
};
struct _GstKlvInspectClass