mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-22 08:17:01 +00:00
4e14bac1ff
Co-authored-by: Andoni Morales Alastruey <ylatuya@gmail.com> Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1312>
137 lines
4.3 KiB
C
137 lines
4.3 KiB
C
/* Gstreamer
|
|
* Copyright 2023 Brad Hards <bradh@frogmouth.net>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "mpegts.h"
|
|
#include "gstmpegts-private.h"
|
|
|
|
#define GST_CAT_DEFAULT mpegts_debug
|
|
|
|
static GstMpegtsMetadataDescriptor
|
|
* _gst_mpegts_metadata_descriptor_copy
|
|
(GstMpegtsMetadataDescriptor * source)
|
|
{
|
|
GstMpegtsMetadataDescriptor *copy =
|
|
g_memdup2 (source, sizeof (GstMpegtsMetadataDescriptor));
|
|
return copy;
|
|
}
|
|
|
|
static void
|
|
_gst_mpegts_metadata_descriptor_free (GstMpegtsMetadataDescriptor * desc)
|
|
{
|
|
g_free (desc);
|
|
}
|
|
|
|
G_DEFINE_BOXED_TYPE (GstMpegtsMetadataDescriptor,
|
|
gst_mpegts_metadata_descriptor,
|
|
(GBoxedCopyFunc) _gst_mpegts_metadata_descriptor_copy,
|
|
(GFreeFunc) _gst_mpegts_metadata_descriptor_free);
|
|
|
|
/**
|
|
* gst_mpegts_descriptor_parse_metadata:
|
|
* @descriptor: a %GST_TYPE_MPEGTS_METADATA_DESCRIPTOR #GstMpegtsDescriptor
|
|
* @res: (out) (transfer full): #GstMpegtsMetadataDescriptor
|
|
*
|
|
* Parses out the metadata descriptor from the @descriptor.
|
|
*
|
|
* See ISO/IEC 13818-1:2018 Section 2.6.60 and 2.6.61 for details.
|
|
* metadata_application_format is provided in Table 2-82. metadata_format is
|
|
* provided in Table 2-85.
|
|
*
|
|
* Returns: %TRUE if the parsing worked correctly, else %FALSE.
|
|
*
|
|
* Since: 1.24
|
|
*/
|
|
gboolean
|
|
gst_mpegts_descriptor_parse_metadata (const GstMpegtsDescriptor * descriptor,
|
|
GstMpegtsMetadataDescriptor ** desc)
|
|
{
|
|
guint8 *data;
|
|
guint8 flag;
|
|
GstMpegtsMetadataDescriptor *res;
|
|
|
|
g_return_val_if_fail (descriptor != NULL && desc != NULL, FALSE);
|
|
__common_desc_checks (descriptor, GST_MTS_DESC_METADATA, 5, FALSE);
|
|
|
|
data = (guint8 *) descriptor->data + 2;
|
|
|
|
res = g_new0 (GstMpegtsMetadataDescriptor, 1);
|
|
|
|
res->metadata_application_format = GST_READ_UINT16_BE (data);
|
|
data += 2;
|
|
if (res->metadata_application_format == 0xFFFF) {
|
|
// skip over metadata_application_format_identifier if it is provided
|
|
data += 4;
|
|
}
|
|
res->metadata_format = *data;
|
|
data += 1;
|
|
if (res->metadata_format == GST_MPEGTS_METADATA_FORMAT_IDENTIFIER_FIELD) {
|
|
res->metadata_format_identifier = GST_READ_UINT32_BE (data);
|
|
data += 4;
|
|
}
|
|
res->metadata_service_id = *data;
|
|
data += 1;
|
|
flag = *data;
|
|
res->decoder_config_flags = flag >> 5;
|
|
res->dsm_cc_flag = (flag & 0x10);
|
|
|
|
// There are more values if the dsm_cc_flag or decoder flags are set.
|
|
|
|
*desc = res;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_mpegts_descriptor_parse_metadata_std:
|
|
* @descriptor: a %GST_MTS_DESC_METADATA_STD #GstMpegtsDescriptor
|
|
* @metadata_input_leak_rate (out): the input leak rate in units of 400bits/sec.
|
|
* @metadata_buffer_size (out): the buffer size in units of 1024 bytes
|
|
* @metadata_output_leak_rate (out): the output leak rate in units of 400bits/sec.
|
|
*
|
|
* Extracts the metadata STD descriptor from @descriptor.
|
|
*
|
|
* See ISO/IEC 13818-1:2018 Section 2.6.62 and 2.6.63 for details.
|
|
*
|
|
* Returns: %TRUE if parsing succeeded, else %FALSE.
|
|
*
|
|
* Since: 1.24
|
|
*/
|
|
gboolean
|
|
gst_mpegts_descriptor_parse_metadata_std (const GstMpegtsDescriptor *
|
|
descriptor, guint32 * metadata_input_leak_rate,
|
|
guint32 * metadata_buffer_size, guint32 * metadata_output_leak_rate)
|
|
{
|
|
guint8 *data;
|
|
|
|
g_return_val_if_fail (descriptor != NULL && metadata_input_leak_rate != NULL
|
|
&& metadata_buffer_size != NULL
|
|
&& metadata_output_leak_rate != NULL, FALSE);
|
|
__common_desc_checks (descriptor, GST_MTS_DESC_METADATA_STD, 9, FALSE);
|
|
data = (guint8 *) descriptor->data + 2;
|
|
*metadata_input_leak_rate = GST_READ_UINT24_BE (data) & 0x3FFFFF;
|
|
data += 3;
|
|
*metadata_buffer_size = GST_READ_UINT24_BE (data) & 0x3FFFFF;
|
|
data += 3;
|
|
*metadata_output_leak_rate = GST_READ_UINT24_BE (data) & 0x3FFFFF;
|
|
return TRUE;
|
|
}
|