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| author | Edward Hervey <bilboed@bilboed.com> | 2014-07-10 11:24:12 +0200 |
|---|---|---|
| committer | Edward Hervey <edward@collabora.com> | 2014-07-11 08:32:06 +0200 |
| commit | 9e73b487c4427495577fc3def77da39f84fa05b9 (patch) | |
| tree | 59a5e36985872a201a6329b55373f3e8985f3381 | |
| parent | 5e4e572335bed642dfab36c4f325fde342a370e5 (diff) | |
| download | gstreamer-plugins-bad-9e73b487c4427495577fc3def77da39f84fa05b9.tar.gz | |
mpegts: Add parsing for CA descriptor (0x05)
https://bugzilla.gnome.org/show_bug.cgi?id=732986
| -rw-r--r-- | gst-libs/gst/mpegts/gstmpegtsdescriptor.c | 41 | ||||
| -rw-r--r-- | gst-libs/gst/mpegts/gstmpegtsdescriptor.h | 7 |
2 files changed, 48 insertions, 0 deletions
diff --git a/gst-libs/gst/mpegts/gstmpegtsdescriptor.c b/gst-libs/gst/mpegts/gstmpegtsdescriptor.c index 246aee45f..06c9f3381 100644 --- a/gst-libs/gst/mpegts/gstmpegtsdescriptor.c +++ b/gst-libs/gst/mpegts/gstmpegtsdescriptor.c @@ -872,6 +872,47 @@ gst_mpegts_descriptor_from_registration (const gchar * format_identifier, 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) */ static GstMpegtsISO639LanguageDescriptor * _gst_mpegts_iso_639_language_descriptor_copy (GstMpegtsISO639LanguageDescriptor diff --git a/gst-libs/gst/mpegts/gstmpegtsdescriptor.h b/gst-libs/gst/mpegts/gstmpegtsdescriptor.h index 73c7e0340..bbef97dd0 100644 --- a/gst-libs/gst/mpegts/gstmpegtsdescriptor.h +++ b/gst-libs/gst/mpegts/gstmpegtsdescriptor.h @@ -274,6 +274,13 @@ GstMpegtsDescriptor *gst_mpegts_descriptor_from_registration ( const gchar *format_identifier, 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) */ /** * GstMpegtsISO639AudioType: |