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rtmp2: Add single-value AMF0 parsing and serializing

Browse source 
https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/merge_requests/878
This commit is contained in:
Jan Alexander Steffens (heftig) 2019-11-27 15:37:45 +01:00
parent f5b068b26c
commit 8f1ae04ac5
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GPG key ID: DE5E0C5F25941CA5
2 changed files with 70 additions and 0 deletions
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65
gst/rtmp2/rtmp/amf.c
View file

@ -886,6 +886,47 @@ parse_value (AmfParser * parser)
return node;
}
GstAmfNode *
gst_amf_node_parse (const guint8 * data, gsize size, guint8 ** endptr)
{
AmfParser parser = {
.data = data,
.size = size,
};
GstAmfNode *node;
g_return_val_if_fail (data, NULL);
g_return_val_if_fail (size, NULL);
init_static ();
GST_TRACE ("Starting parse with %" G_GSIZE_FORMAT " bytes", parser.size);
node = parse_value (&parser);
if (gst_amf_node_get_type (node) == GST_AMF_TYPE_INVALID) {
GST_ERROR ("invalid value");
goto out;
}
if (G_UNLIKELY (GST_LEVEL_LOG <= _gst_debug_min) &&
GST_LEVEL_LOG <= gst_debug_category_get_threshold (GST_CAT_DEFAULT)) {
GString *string = g_string_new (NULL);
gst_amf_node_dump (node, -1, string);
GST_LOG ("Parsed value: %s", string->str);
g_string_free (string, TRUE);
}
GST_TRACE ("Done parsing; consumed %" G_GSIZE_FORMAT " bytes and left %"
G_GSIZE_FORMAT " bytes", parser.offset, parser.size - parser.offset);
out:
if (endptr) {
*endptr = (guint8 *) parser.data + parser.offset;
}
return node;
}
GPtrArray *
gst_amf_parse_command (const guint8 * data, gsize size,
gdouble * transaction_id, gchar ** command_name)
@ -1093,6 +1134,30 @@ serialize_value (GByteArray * array, const GstAmfNode * node)
}
}
GBytes *
gst_amf_node_serialize (const GstAmfNode * node)
{
GByteArray *array = g_byte_array_new ();
g_return_val_if_fail (node, NULL);
init_static ();
if (G_UNLIKELY (GST_LEVEL_LOG <= _gst_debug_min) &&
GST_LEVEL_LOG <= gst_debug_category_get_threshold (GST_CAT_DEFAULT)) {
GString *string = g_string_new (NULL);
gst_amf_node_dump (node, -1, string);
GST_LOG ("Serializing value: %s", string->str);
g_string_free (string, TRUE);
}
serialize_value (array, node);
GST_TRACE ("Done serializing; produced %u bytes", array->len);
return g_byte_array_free_to_bytes (array);
}
GBytes *
gst_amf_serialize_command (gdouble transaction_id, const gchar * command_name,
const GstAmfNode * argument, ...)

5
gst/rtmp2/rtmp/amf.h
View file

@ -100,9 +100,14 @@ void gst_amf_node_append_field_take_string (GstAmfNode * node,
void gst_amf_node_dump (const GstAmfNode * node, gint indent,
GString * string);
GstAmfNode * gst_amf_node_parse (const guint8 * data, gsize size,
guint8 ** endptr);
GPtrArray * gst_amf_parse_command (const guint8 * data, gsize size,
gdouble * transaction_id, gchar ** command_name);
GBytes * gst_amf_node_serialize (const GstAmfNode * node);
GBytes * gst_amf_serialize_command (gdouble transaction_id,
const gchar * command_name, const GstAmfNode * argument, ...) G_GNUC_NULL_TERMINATED;
GBytes * gst_amf_serialize_command_valist (gdouble transaction_id,