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mpegts: Add parsing for CA descriptor (0x05)

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=732986
This commit is contained in:
Edward Hervey 2014-07-10 11:24:12 +02:00 committed by Edward Hervey
parent 5e4e572335
commit 9e73b487c4
2 changed files with 48 additions and 0 deletions
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41
gst-libs/gst/mpegts/gstmpegtsdescriptor.c
View file

@ -872,6 +872,47 @@ gst_mpegts_descriptor_from_registration (const gchar * format_identifier,
return descriptor; return descriptor;
} }
/* GST_MTS_DESC_CA (0x09) */
/**
* gst_mpegts_descriptor_parse_ca:
* @descriptor: a %GST_MTS_DESC_CA #GstMpegtsDescriptor
* @ca_system_id: (out): the type of CA system used
* @ca_pid: (out): The PID containing ECM or EMM data
* @private_data: (out) (allow-none): The private data
* @private_data_size: (out) (allow-none): The size of @private_data in bytes
*
* Extracts the Conditional Access information from @descriptor.
*
* Returns: %TRUE if parsing succeeded, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_ca (GstMpegtsDescriptor * descriptor,
guint16 * ca_system_id, guint16 * ca_pid,
const guint8 ** private_data, gsize * private_data_size)
{
guint8 *data;
g_return_val_if_fail (descriptor != NULL && ca_system_id != NULL
&& ca_pid != NULL, FALSE);
/* The smallest CA is 4 bytes (though not having any private data
* sounds a bit ... weird) */
__common_desc_checks (descriptor, GST_MTS_DESC_CA, 4, FALSE);
data = (guint8 *) descriptor->data + 2;
*ca_system_id = GST_READ_UINT16_BE (data);
data += 2;
*ca_pid = GST_READ_UINT16_BE (data) & 0x1fff;
data += 2;
if (private_data && private_data_size) {
*private_data = data;
*private_data_size = descriptor->length - 4;
}
return TRUE;
}
/* GST_MTS_DESC_ISO_639_LANGUAGE (0x0A) */ /* GST_MTS_DESC_ISO_639_LANGUAGE (0x0A) */
static GstMpegtsISO639LanguageDescriptor * static GstMpegtsISO639LanguageDescriptor *
_gst_mpegts_iso_639_language_descriptor_copy (GstMpegtsISO639LanguageDescriptor _gst_mpegts_iso_639_language_descriptor_copy (GstMpegtsISO639LanguageDescriptor

7
gst-libs/gst/mpegts/gstmpegtsdescriptor.h
View file

@ -274,6 +274,13 @@ GstMpegtsDescriptor *gst_mpegts_descriptor_from_registration (
const gchar *format_identifier, const gchar *format_identifier,
guint8 *additional_info, gsize additional_info_length); guint8 *additional_info, gsize additional_info_length);
/* GST_MTS_DESC_CA (0x09) */
gboolean gst_mpegts_descriptor_parse_ca (GstMpegtsDescriptor *descriptor,
guint16 *ca_system_id,
guint16 *ca_pid,
const guint8 **private_data,
gsize *private_data_size);
/* GST_MTS_DESC_ISO_639_LANGUAGE (0x0A) */ /* GST_MTS_DESC_ISO_639_LANGUAGE (0x0A) */
/** /**
* GstMpegtsISO639AudioType: * GstMpegtsISO639AudioType: