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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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1762 lines
45 KiB
C
1762 lines
45 KiB
C
/*
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* Copyright (C) 2014 Stefan Ringel
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*
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* Authors:
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* Stefan Ringel <linuxtv@stefanringel.de>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <stdlib.h>
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#include "mpegts.h"
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#include "gstmpegts-private.h"
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/**
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* SECTION:gst-atsc-section
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* @title: ATSC variants of MPEG-TS sections
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* @short_description: Sections for the various ATSC specifications
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* @include: gst/mpegts/mpegts.h
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*
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* The list of section types defined and used by the ATSC specifications can be
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* seen in %GstMpegtsSectionATSCTableID.
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*
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* # Supported ATSC MPEG-TS sections
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* These are the sections for which parsing and packetizing code exists.
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*
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* ## Master Guide Table (MGT)
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* See:
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* * gst_mpegts_section_get_atsc_mgt()
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* * %GstMpegtsAtscMGT
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* * %GstMpegtsAtscMGTTable
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* * gst_mpegts_atsc_mgt_new()
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*
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* ## Terrestrial (TVCT) and Cable (CVCT) Virtual Channel Table
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* See:
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* * gst_mpegts_section_get_atsc_tvct()
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* * gst_mpegts_section_get_atsc_cvct()
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* * %GstMpegtsAtscVCT
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* * %GstMpegtsAtscVCTSource
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*
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* ## Rating Region Table (RRT)
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* See:
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* * gst_mpegts_section_get_atsc_rrt()
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* * %GstMpegtsAtscRRT
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* * gst_mpegts_atsc_rrt_new()
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*
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* ## Event Information Table (EIT)
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* See:
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* * gst_mpegts_section_get_atsc_eit()
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* * %GstMpegtsAtscEIT
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* * %GstMpegtsAtscEITEvent
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*
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* ## Extended Text Table (ETT)
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* See:
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* * gst_mpegts_section_get_atsc_ett()
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* * %GstMpegtsAtscETT
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*
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* ## System Time Table (STT)
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* See:
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* * gst_mpegts_section_get_atsc_stt()
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* * %GstMpegtsAtscSTT
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* * gst_mpegts_atsc_stt_new()
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*
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* # API
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*/
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/* Terrestrial/Cable Virtual Channel Table TVCT/CVCT */
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static GstMpegtsAtscVCTSource *
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_gst_mpegts_atsc_vct_source_copy (GstMpegtsAtscVCTSource * source)
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{
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GstMpegtsAtscVCTSource *copy;
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copy = g_memdup2 (source, sizeof (GstMpegtsAtscVCTSource));
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copy->descriptors = g_ptr_array_ref (source->descriptors);
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return copy;
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}
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static void
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_gst_mpegts_atsc_vct_source_free (GstMpegtsAtscVCTSource * source)
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{
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g_free (source->short_name);
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if (source->descriptors)
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g_ptr_array_unref (source->descriptors);
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g_free (source);
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}
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G_DEFINE_BOXED_TYPE (GstMpegtsAtscVCTSource, gst_mpegts_atsc_vct_source,
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(GBoxedCopyFunc) _gst_mpegts_atsc_vct_source_copy,
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(GFreeFunc) _gst_mpegts_atsc_vct_source_free);
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static GstMpegtsAtscVCT *
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_gst_mpegts_atsc_vct_copy (GstMpegtsAtscVCT * vct)
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{
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GstMpegtsAtscVCT *copy;
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copy = g_memdup2 (vct, sizeof (GstMpegtsAtscVCT));
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copy->sources = g_ptr_array_ref (vct->sources);
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copy->descriptors = g_ptr_array_ref (vct->descriptors);
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return copy;
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}
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static void
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_gst_mpegts_atsc_vct_free (GstMpegtsAtscVCT * vct)
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{
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if (vct->sources)
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g_ptr_array_unref (vct->sources);
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if (vct->descriptors)
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g_ptr_array_unref (vct->descriptors);
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g_free (vct);
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}
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G_DEFINE_BOXED_TYPE (GstMpegtsAtscVCT, gst_mpegts_atsc_vct,
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(GBoxedCopyFunc) _gst_mpegts_atsc_vct_copy,
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(GFreeFunc) _gst_mpegts_atsc_vct_free);
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static gpointer
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_parse_atsc_vct (GstMpegtsSection * section)
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{
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GstMpegtsAtscVCT *vct = NULL;
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guint8 *data, *end, source_nb;
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guint32 tmp32;
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guint16 descriptors_loop_length, tmp16;
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guint i;
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GError *err = NULL;
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vct = g_new0 (GstMpegtsAtscVCT, 1);
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data = section->data;
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end = data + section->section_length;
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vct->transport_stream_id = section->subtable_extension;
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/* Skip already parsed data */
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data += 8;
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/* minimum size */
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if (end - data < 2 + 2 + 4)
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goto error;
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vct->protocol_version = *data;
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data += 1;
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source_nb = *data;
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data += 1;
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vct->sources = g_ptr_array_new_full (source_nb,
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(GDestroyNotify) _gst_mpegts_atsc_vct_source_free);
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for (i = 0; i < source_nb; i++) {
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GstMpegtsAtscVCTSource *source;
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/* minimum 32 bytes for a entry, 2 bytes second descriptor
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loop-length, 4 bytes crc */
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if (end - data < 32 + 2 + 4)
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goto error;
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source = g_new0 (GstMpegtsAtscVCTSource, 1);
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g_ptr_array_add (vct->sources, source);
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source->short_name =
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g_convert ((gchar *) data, 14, "utf-8", "utf-16be", NULL, NULL, &err);
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if (err) {
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GST_WARNING ("Failed to convert VCT Source short_name to utf-8: %d %s",
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err->code, err->message);
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GST_MEMDUMP ("UTF-16 string", data, 14);
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g_error_free (err);
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}
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data += 14;
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tmp32 = GST_READ_UINT32_BE (data);
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source->major_channel_number = (tmp32 >> 18) & 0x03FF;
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source->minor_channel_number = (tmp32 >> 8) & 0x03FF;
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source->modulation_mode = tmp32 & 0xF;
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data += 4;
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source->carrier_frequency = GST_READ_UINT32_BE (data);
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data += 4;
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source->channel_TSID = GST_READ_UINT16_BE (data);
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data += 2;
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source->program_number = GST_READ_UINT16_BE (data);
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data += 2;
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tmp16 = GST_READ_UINT16_BE (data);
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source->ETM_location = (tmp16 >> 14) & 0x3;
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source->access_controlled = (tmp16 >> 13) & 0x1;
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source->hidden = (tmp16 >> 12) & 0x1;
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/* only used in CVCT */
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source->path_select = (tmp16 >> 11) & 0x1;
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source->out_of_band = (tmp16 >> 10) & 0x1;
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source->hide_guide = (tmp16 >> 9) & 0x1;
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source->service_type = tmp16 & 0x3f;
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data += 2;
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source->source_id = GST_READ_UINT16_BE (data);
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data += 2;
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descriptors_loop_length = GST_READ_UINT16_BE (data) & 0x03FF;
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data += 2;
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if (end - data < descriptors_loop_length + 6)
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goto error;
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source->descriptors =
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gst_mpegts_parse_descriptors (data, descriptors_loop_length);
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if (source->descriptors == NULL)
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goto error;
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data += descriptors_loop_length;
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}
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descriptors_loop_length = GST_READ_UINT16_BE (data) & 0x03FF;
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data += 2;
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if (end - data < descriptors_loop_length + 4)
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goto error;
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vct->descriptors =
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gst_mpegts_parse_descriptors (data, descriptors_loop_length);
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if (vct->descriptors == NULL)
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goto error;
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return (gpointer) vct;
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error:
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_gst_mpegts_atsc_vct_free (vct);
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return NULL;
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}
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/**
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* gst_mpegts_section_get_atsc_tvct:
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* @section: a #GstMpegtsSection of type %GST_MPEGTS_SECTION_ATSC_TVCT
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*
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* Returns the #GstMpegtsAtscVCT contained in the @section
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*
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* Returns: The #GstMpegtsAtscVCT contained in the section, or %NULL if an error
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* happened.
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*/
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const GstMpegtsAtscVCT *
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gst_mpegts_section_get_atsc_tvct (GstMpegtsSection * section)
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{
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g_return_val_if_fail (section->section_type == GST_MPEGTS_SECTION_ATSC_TVCT,
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NULL);
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g_return_val_if_fail (section->cached_parsed || section->data, NULL);
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if (!section->cached_parsed)
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section->cached_parsed =
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__common_section_checks (section, 16, _parse_atsc_vct,
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(GDestroyNotify) _gst_mpegts_atsc_vct_free);
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return (const GstMpegtsAtscVCT *) section->cached_parsed;
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}
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/**
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* gst_mpegts_section_get_atsc_cvct:
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* @section: a #GstMpegtsSection of type %GST_MPEGTS_SECTION_ATSC_CVCT
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*
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* Returns the #GstMpegtsAtscVCT contained in the @section
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*
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* Returns: The #GstMpegtsAtscVCT contained in the section, or %NULL if an error
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* happened.
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*/
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const GstMpegtsAtscVCT *
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gst_mpegts_section_get_atsc_cvct (GstMpegtsSection * section)
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{
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g_return_val_if_fail (section->section_type == GST_MPEGTS_SECTION_ATSC_CVCT,
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NULL);
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g_return_val_if_fail (section->cached_parsed || section->data, NULL);
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if (!section->cached_parsed)
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section->cached_parsed =
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__common_section_checks (section, 16, _parse_atsc_vct,
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(GDestroyNotify) _gst_mpegts_atsc_vct_free);
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return (const GstMpegtsAtscVCT *) section->cached_parsed;
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}
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/* MGT */
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static GstMpegtsAtscMGTTable *
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_gst_mpegts_atsc_mgt_table_copy (GstMpegtsAtscMGTTable * mgt_table)
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{
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GstMpegtsAtscMGTTable *copy;
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copy = g_memdup2 (mgt_table, sizeof (GstMpegtsAtscMGTTable));
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copy->descriptors = g_ptr_array_ref (mgt_table->descriptors);
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return copy;
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}
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static void
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_gst_mpegts_atsc_mgt_table_free (GstMpegtsAtscMGTTable * mgt_table)
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{
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g_ptr_array_unref (mgt_table->descriptors);
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g_free (mgt_table);
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}
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G_DEFINE_BOXED_TYPE (GstMpegtsAtscMGTTable, gst_mpegts_atsc_mgt_table,
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(GBoxedCopyFunc) _gst_mpegts_atsc_mgt_table_copy,
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(GFreeFunc) _gst_mpegts_atsc_mgt_table_free);
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static GstMpegtsAtscMGT *
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_gst_mpegts_atsc_mgt_copy (GstMpegtsAtscMGT * mgt)
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{
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GstMpegtsAtscMGT *copy;
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copy = g_memdup2 (mgt, sizeof (GstMpegtsAtscMGT));
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copy->tables = g_ptr_array_ref (mgt->tables);
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copy->descriptors = g_ptr_array_ref (mgt->descriptors);
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return copy;
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}
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static void
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_gst_mpegts_atsc_mgt_free (GstMpegtsAtscMGT * mgt)
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{
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g_ptr_array_unref (mgt->tables);
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g_ptr_array_unref (mgt->descriptors);
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g_free (mgt);
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}
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G_DEFINE_BOXED_TYPE (GstMpegtsAtscMGT, gst_mpegts_atsc_mgt,
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(GBoxedCopyFunc) _gst_mpegts_atsc_mgt_copy,
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(GFreeFunc) _gst_mpegts_atsc_mgt_free);
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static gpointer
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_parse_atsc_mgt (GstMpegtsSection * section)
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{
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GstMpegtsAtscMGT *mgt = NULL;
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guint i = 0;
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guint8 *data, *end;
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guint16 descriptors_loop_length;
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mgt = g_new0 (GstMpegtsAtscMGT, 1);
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data = section->data;
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end = data + section->section_length;
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/* Skip already parsed data */
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data += 8;
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mgt->protocol_version = GST_READ_UINT8 (data);
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data += 1;
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mgt->tables_defined = GST_READ_UINT16_BE (data);
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data += 2;
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mgt->tables = g_ptr_array_new_full (mgt->tables_defined,
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(GDestroyNotify) _gst_mpegts_atsc_mgt_table_free);
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for (i = 0; i < mgt->tables_defined && data + 11 < end; i++) {
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GstMpegtsAtscMGTTable *mgt_table;
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if (data + 11 >= end) {
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GST_WARNING ("MGT data too short to parse inner table num %d", i);
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goto error;
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}
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mgt_table = g_new0 (GstMpegtsAtscMGTTable, 1);
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g_ptr_array_add (mgt->tables, mgt_table);
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mgt_table->table_type = GST_READ_UINT16_BE (data);
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data += 2;
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mgt_table->pid = GST_READ_UINT16_BE (data) & 0x1FFF;
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data += 2;
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mgt_table->version_number = GST_READ_UINT8 (data) & 0x1F;
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data += 1;
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mgt_table->number_bytes = GST_READ_UINT32_BE (data);
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data += 4;
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descriptors_loop_length = GST_READ_UINT16_BE (data) & 0x0FFF;
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data += 2;
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|
|
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if (data + descriptors_loop_length >= end) {
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GST_WARNING ("MGT data too short to parse inner table descriptors (table "
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"num %d", i);
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goto error;
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}
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mgt_table->descriptors =
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gst_mpegts_parse_descriptors (data, descriptors_loop_length);
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data += descriptors_loop_length;
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}
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descriptors_loop_length = GST_READ_UINT16_BE (data) & 0xFFF;
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data += 2;
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if (data + descriptors_loop_length >= end) {
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GST_WARNING ("MGT data too short to parse descriptors");
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goto error;
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}
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mgt->descriptors =
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gst_mpegts_parse_descriptors (data, descriptors_loop_length);
|
|
|
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return (gpointer) mgt;
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|
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error:
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_gst_mpegts_atsc_mgt_free (mgt);
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|
|
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return NULL;
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}
|
|
|
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static gboolean
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_packetize_mgt (GstMpegtsSection * section)
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{
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const GstMpegtsAtscMGT *mgt;
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guint8 *pos, *data;
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gsize length;
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guint i, j;
|
|
|
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mgt = gst_mpegts_section_get_atsc_mgt (section);
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|
|
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if (mgt == NULL)
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return FALSE;
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|
|
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if (mgt->tables_defined != mgt->tables->len)
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return FALSE;
|
|
|
|
/* 8 byte common section fields
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* 1 byte protocol version
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* 2 byte tables_defined
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* 2 byte reserved / descriptors_length
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* 4 byte CRC
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*/
|
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length = 17;
|
|
|
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for (i = 0; i < mgt->tables->len; i++) {
|
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GstMpegtsAtscMGTTable *mgt_table = g_ptr_array_index (mgt->tables, 1);
|
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/* 2 byte table_type
|
|
* 2 byte reserved / table_type_PID
|
|
* 1 byte reserved / table_type_version_number
|
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* 4 byte number bytes
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* 2 byte reserved / table_type_descriptors_length
|
|
*/
|
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length += 11;
|
|
|
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if (mgt_table->descriptors) {
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for (j = 0; j < mgt_table->descriptors->len; j++) {
|
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GstMpegtsDescriptor *descriptor =
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g_ptr_array_index (mgt_table->descriptors, j);
|
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length += descriptor->length + 2;
|
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}
|
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}
|
|
}
|
|
|
|
if (mgt->descriptors) {
|
|
for (i = 0; i < mgt->descriptors->len; i++) {
|
|
GstMpegtsDescriptor *descriptor = g_ptr_array_index (mgt->descriptors, i);
|
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length += descriptor->length + 2;
|
|
}
|
|
}
|
|
|
|
_packetize_common_section (section, length);
|
|
|
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data = section->data + 8;
|
|
|
|
/* protocol_version - 8 bit */
|
|
GST_WRITE_UINT8 (data, mgt->protocol_version);
|
|
data += 1;
|
|
|
|
/* tables_defined - 16 bit uimsbf */
|
|
GST_WRITE_UINT16_BE (data, mgt->tables_defined);
|
|
data += 2;
|
|
|
|
for (i = 0; i < mgt->tables_defined; i++) {
|
|
GstMpegtsAtscMGTTable *mgt_table = g_ptr_array_index (mgt->tables, 1);
|
|
|
|
/* table_type - 16 bit uimsbf */
|
|
GST_WRITE_UINT16_BE (data, mgt_table->table_type);
|
|
data += 2;
|
|
|
|
/* 3 bit reserved, 13 bit table_type_PID uimsbf */
|
|
GST_WRITE_UINT16_BE (data, mgt_table->pid | 0xe000);
|
|
data += 2;
|
|
|
|
/* 3 bit reserved, 5 bit table_type_version_number uimsbf */
|
|
GST_WRITE_UINT8 (data, mgt_table->version_number | 0xe0);
|
|
data += 1;
|
|
|
|
/* 4 bit reserved, 12 bit table_type_descriptor_length uimsbf */
|
|
pos = data;
|
|
*data++ = 0xF0;
|
|
*data++ = 0x00;
|
|
|
|
_packetize_descriptor_array (mgt_table->descriptors, &data);
|
|
|
|
/* Go back and update the descriptor length */
|
|
GST_WRITE_UINT16_BE (pos, (data - pos - 2) | 0xF000);
|
|
}
|
|
|
|
/* 4 bit reserved, 12 bit descriptor_length uimsbf */
|
|
pos = data;
|
|
*data++ = 0xF0;
|
|
*data++ = 0x00;
|
|
|
|
_packetize_descriptor_array (mgt->descriptors, &data);
|
|
|
|
/* Go back and update the descriptor length */
|
|
GST_WRITE_UINT16_BE (pos, (data - pos - 2) | 0xF000);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_mpegts_section_from_atsc_mgt:
|
|
* @mgt: (transfer full): a #GstMpegtsAtscMGT to create the #GstMpegtsSection from
|
|
*
|
|
* Returns: (transfer full): the #GstMpegtsSection
|
|
* Since: 1.18
|
|
*/
|
|
GstMpegtsSection *
|
|
gst_mpegts_section_from_atsc_mgt (GstMpegtsAtscMGT * mgt)
|
|
{
|
|
GstMpegtsSection *section;
|
|
|
|
g_return_val_if_fail (mgt != NULL, NULL);
|
|
|
|
section = _gst_mpegts_section_init (0x1ffb,
|
|
GST_MTS_TABLE_ID_ATSC_MASTER_GUIDE);
|
|
|
|
section->subtable_extension = 0x0000;
|
|
section->cached_parsed = (gpointer) mgt;
|
|
section->packetizer = _packetize_mgt;
|
|
section->destroy_parsed = (GDestroyNotify) _gst_mpegts_atsc_mgt_free;
|
|
|
|
return section;
|
|
}
|
|
|
|
/**
|
|
* gst_mpegts_section_get_atsc_mgt:
|
|
* @section: a #GstMpegtsSection of type %GST_MPEGTS_SECTION_ATSC_MGT
|
|
*
|
|
* Returns the #GstMpegtsAtscMGT contained in the @section.
|
|
*
|
|
* Returns: The #GstMpegtsAtscMGT contained in the section, or %NULL if an error
|
|
* happened.
|
|
*/
|
|
const GstMpegtsAtscMGT *
|
|
gst_mpegts_section_get_atsc_mgt (GstMpegtsSection * section)
|
|
{
|
|
g_return_val_if_fail (section->section_type == GST_MPEGTS_SECTION_ATSC_MGT,
|
|
NULL);
|
|
g_return_val_if_fail (section->cached_parsed || section->data, NULL);
|
|
|
|
if (!section->cached_parsed)
|
|
section->cached_parsed =
|
|
__common_section_checks (section, 17, _parse_atsc_mgt,
|
|
(GDestroyNotify) _gst_mpegts_atsc_mgt_free);
|
|
|
|
return (const GstMpegtsAtscMGT *) section->cached_parsed;
|
|
}
|
|
|
|
/**
|
|
* gst_mpegts_section_atsc_mgt_new:
|
|
*
|
|
* Returns: (transfer full): #GstMpegtsAtscMGT
|
|
* Since: 1.18
|
|
*/
|
|
GstMpegtsAtscMGT *
|
|
gst_mpegts_atsc_mgt_new (void)
|
|
{
|
|
GstMpegtsAtscMGT *mgt;
|
|
|
|
mgt = g_new0 (GstMpegtsAtscMGT, 1);
|
|
|
|
mgt->tables = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
_gst_mpegts_atsc_mgt_table_free);
|
|
|
|
mgt->descriptors = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
gst_mpegts_descriptor_free);
|
|
|
|
return mgt;
|
|
}
|
|
|
|
/* Multi string structure */
|
|
|
|
static GstMpegtsAtscStringSegment *
|
|
_gst_mpegts_atsc_string_segment_copy (GstMpegtsAtscStringSegment * seg)
|
|
{
|
|
GstMpegtsAtscStringSegment *copy;
|
|
|
|
copy = g_memdup2 (seg, sizeof (GstMpegtsAtscStringSegment));
|
|
|
|
return copy;
|
|
}
|
|
|
|
static void
|
|
_gst_mpegts_atsc_string_segment_free (GstMpegtsAtscStringSegment * seg)
|
|
{
|
|
g_free (seg->cached_string);
|
|
g_free (seg);
|
|
}
|
|
|
|
static void
|
|
_gst_mpegts_atsc_string_segment_decode_string (GstMpegtsAtscStringSegment * seg)
|
|
{
|
|
const gchar *from_encoding;
|
|
|
|
g_return_if_fail (seg->cached_string == NULL);
|
|
|
|
if (seg->compression_type != 0) {
|
|
GST_FIXME ("Compressed strings not yet supported");
|
|
return;
|
|
}
|
|
|
|
/* FIXME add more encodings */
|
|
switch (seg->mode) {
|
|
case 0x3F:
|
|
from_encoding = "UTF-16BE";
|
|
break;
|
|
default:
|
|
from_encoding = NULL;
|
|
break;
|
|
}
|
|
|
|
if (from_encoding != NULL && seg->compressed_data_size > 0) {
|
|
GError *err = NULL;
|
|
|
|
seg->cached_string =
|
|
g_convert ((gchar *) seg->compressed_data,
|
|
(gssize) seg->compressed_data_size, "UTF-8", from_encoding, NULL, NULL,
|
|
&err);
|
|
|
|
if (err) {
|
|
GST_WARNING ("Failed to convert input string from codeset %s",
|
|
from_encoding);
|
|
g_error_free (err);
|
|
}
|
|
} else {
|
|
seg->cached_string =
|
|
g_strndup ((gchar *) seg->compressed_data, seg->compressed_data_size);
|
|
}
|
|
}
|
|
|
|
const gchar *
|
|
gst_mpegts_atsc_string_segment_get_string (GstMpegtsAtscStringSegment * seg)
|
|
{
|
|
if (!seg->cached_string)
|
|
_gst_mpegts_atsc_string_segment_decode_string (seg);
|
|
|
|
return seg->cached_string;
|
|
}
|
|
|
|
gboolean
|
|
gst_mpegts_atsc_string_segment_set_string (GstMpegtsAtscStringSegment * seg,
|
|
gchar * string, guint8 compression_type, guint8 mode)
|
|
{
|
|
const gchar *to_encoding = NULL;
|
|
gboolean ret = FALSE;
|
|
gsize written;
|
|
GError *err = NULL;
|
|
unsigned long len;
|
|
|
|
if (compression_type) {
|
|
GST_FIXME ("Compressed strings not yet supported");
|
|
goto done;
|
|
}
|
|
|
|
switch (mode) {
|
|
case 0x3f:
|
|
to_encoding = "UTF-16BE";
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (seg->cached_string)
|
|
g_free (seg->cached_string);
|
|
|
|
if (seg->compressed_data)
|
|
g_free (seg->compressed_data);
|
|
|
|
seg->cached_string = g_strdup (string);
|
|
seg->compression_type = compression_type;
|
|
seg->mode = mode;
|
|
|
|
len = strlen (string);
|
|
|
|
if (to_encoding && len) {
|
|
gchar *converted = g_convert (string, len, to_encoding, "UTF-8",
|
|
NULL, &written, &err);
|
|
|
|
if (err) {
|
|
GST_WARNING ("Failed to convert input string to codeset %s (%s)",
|
|
to_encoding, err->message);
|
|
g_error_free (err);
|
|
goto done;
|
|
}
|
|
|
|
seg->compressed_data = (guint8 *) g_strndup (converted, written);
|
|
seg->compressed_data_size = written;
|
|
g_free (converted);
|
|
} else {
|
|
seg->compressed_data = (guint8 *) g_strndup (string, len);
|
|
seg->compressed_data_size = len;
|
|
}
|
|
|
|
ret = TRUE;
|
|
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
G_DEFINE_BOXED_TYPE (GstMpegtsAtscStringSegment, gst_mpegts_atsc_string_segment,
|
|
(GBoxedCopyFunc) _gst_mpegts_atsc_string_segment_copy,
|
|
(GFreeFunc) _gst_mpegts_atsc_string_segment_free);
|
|
|
|
static GstMpegtsAtscMultString *
|
|
_gst_mpegts_atsc_mult_string_copy (GstMpegtsAtscMultString * mstring)
|
|
{
|
|
GstMpegtsAtscMultString *copy;
|
|
|
|
copy = g_memdup2 (mstring, sizeof (GstMpegtsAtscMultString));
|
|
copy->segments = g_ptr_array_ref (mstring->segments);
|
|
|
|
return copy;
|
|
}
|
|
|
|
static void
|
|
_gst_mpegts_atsc_mult_string_free (GstMpegtsAtscMultString * mstring)
|
|
{
|
|
g_ptr_array_unref (mstring->segments);
|
|
g_free (mstring);
|
|
}
|
|
|
|
G_DEFINE_BOXED_TYPE (GstMpegtsAtscMultString, gst_mpegts_atsc_mult_string,
|
|
(GBoxedCopyFunc) _gst_mpegts_atsc_mult_string_copy,
|
|
(GFreeFunc) _gst_mpegts_atsc_mult_string_free);
|
|
|
|
static GPtrArray *
|
|
_parse_atsc_mult_string (guint8 * data, guint datasize)
|
|
{
|
|
guint8 num_strings;
|
|
GPtrArray *res = NULL;
|
|
guint8 *end = data + datasize;
|
|
gint i;
|
|
|
|
if (datasize > 0) {
|
|
/* 1 is the minimum entry size, so no need to check here */
|
|
num_strings = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
|
|
res =
|
|
g_ptr_array_new_full (num_strings,
|
|
(GDestroyNotify) _gst_mpegts_atsc_mult_string_free);
|
|
|
|
for (i = 0; i < num_strings; i++) {
|
|
GstMpegtsAtscMultString *mstring;
|
|
guint8 num_segments;
|
|
gint j;
|
|
|
|
mstring = g_new0 (GstMpegtsAtscMultString, 1);
|
|
g_ptr_array_add (res, mstring);
|
|
mstring->segments =
|
|
g_ptr_array_new_full (num_strings,
|
|
(GDestroyNotify) _gst_mpegts_atsc_string_segment_free);
|
|
|
|
/* each entry needs at least 4 bytes (lang code and segments number) */
|
|
if (end - data < 4) {
|
|
GST_WARNING ("Data too short for multstring parsing %d",
|
|
(gint) (end - data));
|
|
goto error;
|
|
}
|
|
|
|
mstring->iso_639_langcode[0] = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
mstring->iso_639_langcode[1] = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
mstring->iso_639_langcode[2] = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
num_segments = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
|
|
for (j = 0; j < num_segments; j++) {
|
|
GstMpegtsAtscStringSegment *seg;
|
|
|
|
seg = g_new0 (GstMpegtsAtscStringSegment, 1);
|
|
g_ptr_array_add (mstring->segments, seg);
|
|
|
|
/* each entry needs at least 3 bytes */
|
|
if (end - data < 3) {
|
|
GST_WARNING ("Data too short for multstring parsing %d", datasize);
|
|
goto error;
|
|
}
|
|
|
|
seg->compression_type = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
seg->mode = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
seg->compressed_data_size = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
|
|
if (end - data < seg->compressed_data_size) {
|
|
GST_WARNING ("Data too short for multstring parsing %d", datasize);
|
|
goto error;
|
|
}
|
|
|
|
if (seg->compressed_data_size)
|
|
seg->compressed_data = data;
|
|
data += seg->compressed_data_size;
|
|
}
|
|
|
|
}
|
|
}
|
|
return res;
|
|
|
|
error:
|
|
if (res)
|
|
g_ptr_array_unref (res);
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
_packetize_atsc_mult_string (GPtrArray * strings, guint8 ** data)
|
|
{
|
|
guint i;
|
|
|
|
if (strings == NULL)
|
|
return;
|
|
|
|
/* 8 bit number_strings */
|
|
GST_WRITE_UINT8 (*data, strings->len);
|
|
*data += 1;
|
|
|
|
for (i = 0; i < strings->len; i++) {
|
|
GstMpegtsAtscMultString *string;
|
|
guint j;
|
|
|
|
string = g_ptr_array_index (strings, i);
|
|
|
|
/* 24 bit ISO_639_langcode */
|
|
GST_WRITE_UINT8 (*data, string->iso_639_langcode[0]);
|
|
*data += 1;
|
|
GST_WRITE_UINT8 (*data, string->iso_639_langcode[1]);
|
|
*data += 1;
|
|
GST_WRITE_UINT8 (*data, string->iso_639_langcode[2]);
|
|
*data += 1;
|
|
/* 8 bit number_segments */
|
|
GST_WRITE_UINT8 (*data, string->segments->len);
|
|
*data += 1;
|
|
|
|
for (j = 0; j < string->segments->len; j++) {
|
|
GstMpegtsAtscStringSegment *seg;
|
|
|
|
seg = g_ptr_array_index (string->segments, j);
|
|
|
|
/* 8 bit compression_type */
|
|
GST_WRITE_UINT8 (*data, seg->compression_type);
|
|
*data += 1;
|
|
/* 8 bit mode */
|
|
GST_WRITE_UINT8 (*data, seg->mode);
|
|
*data += 1;
|
|
/* 8 bit number_bytes */
|
|
GST_WRITE_UINT8 (*data, seg->compressed_data_size);
|
|
*data += 1;
|
|
/* number_bytes compressed string */
|
|
memcpy (*data, seg->compressed_data, seg->compressed_data_size);
|
|
*data += seg->compressed_data_size;
|
|
}
|
|
}
|
|
}
|
|
|
|
static gsize
|
|
_get_atsc_mult_string_packetized_length (GPtrArray * strings)
|
|
{
|
|
gsize length = 1;
|
|
guint i;
|
|
|
|
for (i = 0; i < strings->len; i++) {
|
|
GstMpegtsAtscMultString *string;
|
|
guint j;
|
|
|
|
string = g_ptr_array_index (strings, i);
|
|
|
|
length += 4;
|
|
|
|
for (j = 0; j < string->segments->len; j++) {
|
|
GstMpegtsAtscStringSegment *seg;
|
|
|
|
seg = g_ptr_array_index (string->segments, j);
|
|
|
|
length += 3 + seg->compressed_data_size;
|
|
}
|
|
}
|
|
|
|
return length;
|
|
}
|
|
|
|
/* EIT */
|
|
|
|
static GstMpegtsAtscEITEvent *
|
|
_gst_mpegts_atsc_eit_event_copy (GstMpegtsAtscEITEvent * event)
|
|
{
|
|
GstMpegtsAtscEITEvent *copy;
|
|
|
|
copy = g_memdup2 (event, sizeof (GstMpegtsAtscEITEvent));
|
|
copy->titles = g_ptr_array_ref (event->titles);
|
|
copy->descriptors = g_ptr_array_ref (event->descriptors);
|
|
|
|
return copy;
|
|
}
|
|
|
|
static void
|
|
_gst_mpegts_atsc_eit_event_free (GstMpegtsAtscEITEvent * event)
|
|
{
|
|
if (event->titles)
|
|
g_ptr_array_unref (event->titles);
|
|
if (event->descriptors)
|
|
g_ptr_array_unref (event->descriptors);
|
|
g_free (event);
|
|
}
|
|
|
|
G_DEFINE_BOXED_TYPE (GstMpegtsAtscEITEvent, gst_mpegts_atsc_eit_event,
|
|
(GBoxedCopyFunc) _gst_mpegts_atsc_eit_event_copy,
|
|
(GFreeFunc) _gst_mpegts_atsc_eit_event_free);
|
|
|
|
static GstMpegtsAtscEIT *
|
|
_gst_mpegts_atsc_eit_copy (GstMpegtsAtscEIT * eit)
|
|
{
|
|
GstMpegtsAtscEIT *copy;
|
|
|
|
copy = g_memdup2 (eit, sizeof (GstMpegtsAtscEIT));
|
|
copy->events = g_ptr_array_ref (eit->events);
|
|
|
|
return copy;
|
|
}
|
|
|
|
static void
|
|
_gst_mpegts_atsc_eit_free (GstMpegtsAtscEIT * eit)
|
|
{
|
|
if (eit->events)
|
|
g_ptr_array_unref (eit->events);
|
|
g_free (eit);
|
|
}
|
|
|
|
G_DEFINE_BOXED_TYPE (GstMpegtsAtscEIT, gst_mpegts_atsc_eit,
|
|
(GBoxedCopyFunc) _gst_mpegts_atsc_eit_copy,
|
|
(GFreeFunc) _gst_mpegts_atsc_eit_free);
|
|
|
|
static gpointer
|
|
_parse_atsc_eit (GstMpegtsSection * section)
|
|
{
|
|
GstMpegtsAtscEIT *eit = NULL;
|
|
guint i = 0;
|
|
guint8 *data, *end;
|
|
guint8 num_events;
|
|
|
|
eit = g_new0 (GstMpegtsAtscEIT, 1);
|
|
|
|
data = section->data;
|
|
end = data + section->section_length;
|
|
|
|
eit->source_id = section->subtable_extension;
|
|
|
|
/* Skip already parsed data */
|
|
data += 8;
|
|
|
|
eit->protocol_version = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
num_events = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
|
|
eit->events = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
_gst_mpegts_atsc_eit_event_free);
|
|
|
|
for (i = 0; i < num_events; i++) {
|
|
GstMpegtsAtscEITEvent *event;
|
|
guint32 tmp;
|
|
guint8 text_length;
|
|
guint16 descriptors_loop_length;
|
|
|
|
if (end - data < 12) {
|
|
GST_WARNING ("PID %d invalid EIT entry length %d with %u events",
|
|
section->pid, (gint) (end - 4 - data), num_events);
|
|
goto error;
|
|
}
|
|
|
|
event = g_new0 (GstMpegtsAtscEITEvent, 1);
|
|
g_ptr_array_add (eit->events, event);
|
|
|
|
event->event_id = GST_READ_UINT16_BE (data) & 0x3FFF;
|
|
data += 2;
|
|
event->start_time = GST_READ_UINT32_BE (data);
|
|
data += 4;
|
|
|
|
tmp = GST_READ_UINT32_BE (data);
|
|
data += 4;
|
|
event->etm_location = (tmp >> 28) & 0x3;
|
|
event->length_in_seconds = (tmp >> 8) & 0x0FFFFF;
|
|
text_length = tmp & 0xFF;
|
|
|
|
if (text_length > end - data - 4 - 2) {
|
|
GST_WARNING ("PID %d invalid EIT entry length %d with %u events",
|
|
section->pid, (gint) (end - 4 - data), num_events);
|
|
goto error;
|
|
}
|
|
event->titles = _parse_atsc_mult_string (data, text_length);
|
|
data += text_length;
|
|
|
|
descriptors_loop_length = GST_READ_UINT16_BE (data) & 0x0FFF;
|
|
data += 2;
|
|
|
|
if (end - data - 4 < descriptors_loop_length) {
|
|
GST_WARNING ("PID %d invalid EIT entry length %d with %u events",
|
|
section->pid, (gint) (end - 4 - data), num_events);
|
|
goto error;
|
|
}
|
|
|
|
event->descriptors =
|
|
gst_mpegts_parse_descriptors (data, descriptors_loop_length);
|
|
data += descriptors_loop_length;
|
|
}
|
|
|
|
if (data != end - 4) {
|
|
GST_WARNING ("PID %d invalid EIT parsed %d length %d",
|
|
section->pid, (gint) (data - section->data), section->section_length);
|
|
goto error;
|
|
}
|
|
|
|
return (gpointer) eit;
|
|
|
|
error:
|
|
_gst_mpegts_atsc_eit_free (eit);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
/**
|
|
* gst_mpegts_section_get_atsc_eit:
|
|
* @section: a #GstMpegtsSection of type %GST_MPEGTS_SECTION_ATSC_EIT
|
|
*
|
|
* Returns the #GstMpegtsAtscEIT contained in the @section.
|
|
*
|
|
* Returns: The #GstMpegtsAtscEIT contained in the section, or %NULL if an error
|
|
* happened.
|
|
*/
|
|
const GstMpegtsAtscEIT *
|
|
gst_mpegts_section_get_atsc_eit (GstMpegtsSection * section)
|
|
{
|
|
g_return_val_if_fail (section->section_type == GST_MPEGTS_SECTION_ATSC_EIT,
|
|
NULL);
|
|
g_return_val_if_fail (section->cached_parsed || section->data, NULL);
|
|
|
|
if (!section->cached_parsed)
|
|
section->cached_parsed =
|
|
__common_section_checks (section, 14, _parse_atsc_eit,
|
|
(GDestroyNotify) _gst_mpegts_atsc_eit_free);
|
|
|
|
return (const GstMpegtsAtscEIT *) section->cached_parsed;
|
|
}
|
|
|
|
|
|
static GstMpegtsAtscETT *
|
|
_gst_mpegts_atsc_ett_copy (GstMpegtsAtscETT * ett)
|
|
{
|
|
GstMpegtsAtscETT *copy;
|
|
|
|
copy = g_memdup2 (ett, sizeof (GstMpegtsAtscETT));
|
|
copy->messages = g_ptr_array_ref (ett->messages);
|
|
|
|
return copy;
|
|
}
|
|
|
|
static void
|
|
_gst_mpegts_atsc_ett_free (GstMpegtsAtscETT * ett)
|
|
{
|
|
if (ett->messages)
|
|
g_ptr_array_unref (ett->messages);
|
|
g_free (ett);
|
|
}
|
|
|
|
G_DEFINE_BOXED_TYPE (GstMpegtsAtscETT, gst_mpegts_atsc_ett,
|
|
(GBoxedCopyFunc) _gst_mpegts_atsc_ett_copy,
|
|
(GFreeFunc) _gst_mpegts_atsc_ett_free);
|
|
|
|
static gpointer
|
|
_parse_ett (GstMpegtsSection * section)
|
|
{
|
|
GstMpegtsAtscETT *ett = NULL;
|
|
guint8 *data, *end;
|
|
|
|
ett = g_new0 (GstMpegtsAtscETT, 1);
|
|
|
|
data = section->data;
|
|
end = data + section->section_length;
|
|
|
|
ett->ett_table_id_extension = section->subtable_extension;
|
|
|
|
/* Skip already parsed data */
|
|
data += 8;
|
|
|
|
ett->protocol_version = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
ett->etm_id = GST_READ_UINT32_BE (data);
|
|
data += 4;
|
|
|
|
ett->messages = _parse_atsc_mult_string (data, end - data - 4);
|
|
data += end - data - 4;
|
|
|
|
if (data != end - 4) {
|
|
GST_WARNING ("PID %d invalid ETT parsed %d length %d",
|
|
section->pid, (gint) (data - section->data), section->section_length);
|
|
goto error;
|
|
}
|
|
|
|
return (gpointer) ett;
|
|
|
|
error:
|
|
_gst_mpegts_atsc_ett_free (ett);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
/**
|
|
* gst_mpegts_section_get_atsc_ett:
|
|
* @section: a #GstMpegtsSection of type %GST_MPEGTS_SECTION_ATSC_ETT
|
|
*
|
|
* Returns the #GstMpegtsAtscETT contained in the @section.
|
|
*
|
|
* Returns: The #GstMpegtsAtscETT contained in the section, or %NULL if an error
|
|
* happened.
|
|
*/
|
|
const GstMpegtsAtscETT *
|
|
gst_mpegts_section_get_atsc_ett (GstMpegtsSection * section)
|
|
{
|
|
g_return_val_if_fail (section->section_type == GST_MPEGTS_SECTION_ATSC_ETT,
|
|
NULL);
|
|
g_return_val_if_fail (section->cached_parsed || section->data, NULL);
|
|
|
|
if (!section->cached_parsed)
|
|
section->cached_parsed = __common_section_checks (section, 17, _parse_ett,
|
|
(GDestroyNotify) _gst_mpegts_atsc_ett_free);
|
|
|
|
return (const GstMpegtsAtscETT *) section->cached_parsed;
|
|
}
|
|
|
|
/* STT */
|
|
|
|
static GstMpegtsAtscSTT *
|
|
_gst_mpegts_atsc_stt_copy (GstMpegtsAtscSTT * stt)
|
|
{
|
|
GstMpegtsAtscSTT *copy;
|
|
|
|
copy = g_memdup2 (stt, sizeof (GstMpegtsAtscSTT));
|
|
copy->descriptors = g_ptr_array_ref (stt->descriptors);
|
|
|
|
return copy;
|
|
}
|
|
|
|
static void
|
|
_gst_mpegts_atsc_stt_free (GstMpegtsAtscSTT * stt)
|
|
{
|
|
if (stt->descriptors)
|
|
g_ptr_array_unref (stt->descriptors);
|
|
if (stt->utc_datetime)
|
|
gst_date_time_unref (stt->utc_datetime);
|
|
|
|
g_free (stt);
|
|
}
|
|
|
|
G_DEFINE_BOXED_TYPE (GstMpegtsAtscSTT, gst_mpegts_atsc_stt,
|
|
(GBoxedCopyFunc) _gst_mpegts_atsc_stt_copy,
|
|
(GFreeFunc) _gst_mpegts_atsc_stt_free);
|
|
|
|
static gpointer
|
|
_parse_atsc_stt (GstMpegtsSection * section)
|
|
{
|
|
GstMpegtsAtscSTT *stt = NULL;
|
|
guint8 *data, *end;
|
|
guint16 daylight_saving;
|
|
|
|
stt = g_new0 (GstMpegtsAtscSTT, 1);
|
|
|
|
data = section->data;
|
|
end = data + section->section_length;
|
|
|
|
/* Skip already parsed data */
|
|
data += 8;
|
|
|
|
stt->protocol_version = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
stt->system_time = GST_READ_UINT32_BE (data);
|
|
data += 4;
|
|
stt->gps_utc_offset = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
|
|
daylight_saving = GST_READ_UINT16_BE (data);
|
|
data += 2;
|
|
stt->ds_status = daylight_saving >> 15;
|
|
stt->ds_dayofmonth = (daylight_saving >> 8) & 0x1F;
|
|
stt->ds_hour = daylight_saving & 0xFF;
|
|
|
|
stt->descriptors = gst_mpegts_parse_descriptors (data, end - data - 4);
|
|
if (stt->descriptors == NULL)
|
|
goto error;
|
|
|
|
return (gpointer) stt;
|
|
|
|
error:
|
|
_gst_mpegts_atsc_stt_free (stt);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static gboolean
|
|
_packetize_stt (GstMpegtsSection * section)
|
|
{
|
|
const GstMpegtsAtscSTT *stt;
|
|
guint8 *data;
|
|
gsize length;
|
|
guint i;
|
|
|
|
stt = gst_mpegts_section_get_atsc_stt (section);
|
|
|
|
if (stt == NULL)
|
|
return FALSE;
|
|
|
|
/* 8 byte common section fields
|
|
* 1 byte protocol version
|
|
* 4 byte system time
|
|
* 1 byte GPS_UTC_offset
|
|
* 2 byte daylight saving
|
|
* 4 byte CRC
|
|
*/
|
|
length = 20;
|
|
|
|
if (stt->descriptors) {
|
|
for (i = 0; i < stt->descriptors->len; i++) {
|
|
GstMpegtsDescriptor *descriptor = g_ptr_array_index (stt->descriptors, i);
|
|
length += descriptor->length + 2;
|
|
}
|
|
}
|
|
|
|
_packetize_common_section (section, length);
|
|
|
|
data = section->data + 8;
|
|
|
|
/* protocol_version - 8 bit */
|
|
GST_WRITE_UINT8 (data, stt->protocol_version);
|
|
data += 1;
|
|
/* system time - 32 bit uimsbf */
|
|
GST_WRITE_UINT32_BE (data, stt->system_time);
|
|
data += 4;
|
|
/* GPS_UTC_offset - 8 bit */
|
|
GST_WRITE_UINT8 (data, stt->gps_utc_offset);
|
|
data += 1;
|
|
/* daylight_saving - 16 bit uimsbf */
|
|
GST_WRITE_UINT8 (data,
|
|
(stt->ds_status << 7) | 0x60 | (stt->ds_dayofmonth & 0x1f));
|
|
data += 1;
|
|
GST_WRITE_UINT8 (data, stt->ds_hour);
|
|
data += 1;
|
|
|
|
_packetize_descriptor_array (stt->descriptors, &data);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_mpegts_section_section_from_atsc_stt:
|
|
* @stt: (transfer full): a #GstMpegtsAtscSTT to create the #GstMpegtsSection from
|
|
*
|
|
* Returns: (transfer full): the #GstMpegtsSection
|
|
* Since: 1.18
|
|
*/
|
|
GstMpegtsSection *
|
|
gst_mpegts_section_from_atsc_stt (GstMpegtsAtscSTT * stt)
|
|
{
|
|
GstMpegtsSection *section;
|
|
|
|
g_return_val_if_fail (stt != NULL, NULL);
|
|
|
|
section = _gst_mpegts_section_init (0x1ffb,
|
|
GST_MTS_TABLE_ID_ATSC_SYSTEM_TIME);
|
|
|
|
section->subtable_extension = 0x0000;
|
|
section->cached_parsed = (gpointer) stt;
|
|
section->packetizer = _packetize_stt;
|
|
section->destroy_parsed = (GDestroyNotify) _gst_mpegts_atsc_stt_free;
|
|
|
|
return section;
|
|
}
|
|
|
|
/**
|
|
* gst_mpegts_section_get_atsc_stt:
|
|
* @section: a #GstMpegtsSection of type %GST_MPEGTS_SECTION_ATSC_STT
|
|
*
|
|
* Returns the #GstMpegtsAtscSTT contained in the @section.
|
|
*
|
|
* Returns: The #GstMpegtsAtscSTT contained in the section, or %NULL if an error
|
|
* happened.
|
|
*/
|
|
const GstMpegtsAtscSTT *
|
|
gst_mpegts_section_get_atsc_stt (GstMpegtsSection * section)
|
|
{
|
|
g_return_val_if_fail (section->section_type == GST_MPEGTS_SECTION_ATSC_STT,
|
|
NULL);
|
|
g_return_val_if_fail (section->cached_parsed || section->data, NULL);
|
|
|
|
if (!section->cached_parsed)
|
|
section->cached_parsed =
|
|
__common_section_checks (section, 20, _parse_atsc_stt,
|
|
(GDestroyNotify) _gst_mpegts_atsc_stt_free);
|
|
|
|
return (const GstMpegtsAtscSTT *) section->cached_parsed;
|
|
}
|
|
|
|
/**
|
|
* gst_mpegts_section_atsc_stt_new:
|
|
*
|
|
* Returns: (transfer full): #GstMpegtsAtscSTT
|
|
* Since: 1.18
|
|
*/
|
|
GstMpegtsAtscSTT *
|
|
gst_mpegts_atsc_stt_new (void)
|
|
{
|
|
GstMpegtsAtscSTT *stt;
|
|
|
|
stt = g_new0 (GstMpegtsAtscSTT, 1);
|
|
stt->descriptors = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
gst_mpegts_descriptor_free);
|
|
|
|
return stt;
|
|
}
|
|
|
|
#define GPS_TO_UTC_TICKS G_GINT64_CONSTANT(315964800)
|
|
static GstDateTime *
|
|
_gst_mpegts_atsc_gps_time_to_datetime (guint32 systemtime, guint8 gps_offset)
|
|
{
|
|
return gst_date_time_new_from_unix_epoch_utc (systemtime - gps_offset +
|
|
GPS_TO_UTC_TICKS);
|
|
}
|
|
|
|
GstDateTime *
|
|
gst_mpegts_atsc_stt_get_datetime_utc (GstMpegtsAtscSTT * stt)
|
|
{
|
|
if (stt->utc_datetime == NULL)
|
|
stt->utc_datetime = _gst_mpegts_atsc_gps_time_to_datetime (stt->system_time,
|
|
stt->gps_utc_offset);
|
|
|
|
if (stt->utc_datetime)
|
|
return gst_date_time_ref (stt->utc_datetime);
|
|
return NULL;
|
|
}
|
|
|
|
/* RRT */
|
|
|
|
static GstMpegtsAtscRRTDimensionValue *
|
|
_gst_mpegts_atsc_rrt_dimension_value_copy (GstMpegtsAtscRRTDimensionValue *
|
|
value)
|
|
{
|
|
GstMpegtsAtscRRTDimensionValue *copy;
|
|
|
|
copy = g_memdup2 (value, sizeof (GstMpegtsAtscRRTDimensionValue));
|
|
copy->abbrev_ratings = g_ptr_array_ref (value->abbrev_ratings);
|
|
copy->ratings = g_ptr_array_ref (value->ratings);
|
|
|
|
return copy;
|
|
}
|
|
|
|
static void
|
|
_gst_mpegts_atsc_rrt_dimension_value_free (GstMpegtsAtscRRTDimensionValue *
|
|
value)
|
|
{
|
|
if (value->abbrev_ratings)
|
|
g_ptr_array_unref (value->abbrev_ratings);
|
|
if (value->ratings)
|
|
g_ptr_array_unref (value->ratings);
|
|
|
|
g_free (value);
|
|
}
|
|
|
|
G_DEFINE_BOXED_TYPE (GstMpegtsAtscRRTDimensionValue,
|
|
gst_mpegts_atsc_rrt_dimension_value,
|
|
(GBoxedCopyFunc) _gst_mpegts_atsc_rrt_dimension_value_copy,
|
|
(GFreeFunc) _gst_mpegts_atsc_rrt_dimension_value_free);
|
|
|
|
static GstMpegtsAtscRRTDimension *
|
|
_gst_mpegts_atsc_rrt_dimension_copy (GstMpegtsAtscRRTDimension * dim)
|
|
{
|
|
GstMpegtsAtscRRTDimension *copy;
|
|
|
|
copy = g_memdup2 (dim, sizeof (GstMpegtsAtscRRTDimension));
|
|
copy->names = g_ptr_array_ref (dim->names);
|
|
copy->values = g_ptr_array_ref (dim->values);
|
|
|
|
return copy;
|
|
}
|
|
|
|
static void
|
|
_gst_mpegts_atsc_rrt_dimension_free (GstMpegtsAtscRRTDimension * dim)
|
|
{
|
|
if (dim->names)
|
|
g_ptr_array_unref (dim->names);
|
|
if (dim->values)
|
|
g_ptr_array_unref (dim->values);
|
|
|
|
g_free (dim);
|
|
}
|
|
|
|
G_DEFINE_BOXED_TYPE (GstMpegtsAtscRRTDimension, gst_mpegts_atsc_rrt_dimension,
|
|
(GBoxedCopyFunc) _gst_mpegts_atsc_rrt_dimension_copy,
|
|
(GFreeFunc) _gst_mpegts_atsc_rrt_dimension_free);
|
|
|
|
static GstMpegtsAtscRRT *
|
|
_gst_mpegts_atsc_rrt_copy (GstMpegtsAtscRRT * rrt)
|
|
{
|
|
GstMpegtsAtscRRT *copy;
|
|
|
|
copy = g_memdup2 (rrt, sizeof (GstMpegtsAtscRRT));
|
|
copy->names = g_ptr_array_ref (rrt->names);
|
|
copy->dimensions = g_ptr_array_ref (rrt->dimensions);
|
|
copy->descriptors = g_ptr_array_ref (rrt->descriptors);
|
|
|
|
return copy;
|
|
}
|
|
|
|
static void
|
|
_gst_mpegts_atsc_rrt_free (GstMpegtsAtscRRT * rrt)
|
|
{
|
|
if (rrt->names)
|
|
g_ptr_array_unref (rrt->names);
|
|
if (rrt->dimensions)
|
|
g_ptr_array_unref (rrt->dimensions);
|
|
if (rrt->descriptors)
|
|
g_ptr_array_unref (rrt->descriptors);
|
|
|
|
g_free (rrt);
|
|
}
|
|
|
|
G_DEFINE_BOXED_TYPE (GstMpegtsAtscRRT, gst_mpegts_atsc_rrt,
|
|
(GBoxedCopyFunc) _gst_mpegts_atsc_rrt_copy,
|
|
(GFreeFunc) _gst_mpegts_atsc_rrt_free);
|
|
|
|
static gpointer
|
|
_parse_rrt (GstMpegtsSection * section)
|
|
{
|
|
GstMpegtsAtscRRT *rrt = NULL;
|
|
guint i = 0;
|
|
guint8 *data;
|
|
guint16 descriptors_loop_length;
|
|
guint8 text_length;
|
|
|
|
rrt = g_new0 (GstMpegtsAtscRRT, 1);
|
|
|
|
data = section->data;
|
|
|
|
/* Skip already parsed data */
|
|
data += 8;
|
|
|
|
rrt->protocol_version = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
|
|
text_length = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
rrt->names = _parse_atsc_mult_string (data, text_length);
|
|
data += text_length;
|
|
|
|
rrt->dimensions_defined = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
|
|
rrt->dimensions = g_ptr_array_new_full (rrt->dimensions_defined,
|
|
(GDestroyNotify) _gst_mpegts_atsc_rrt_dimension_free);
|
|
|
|
for (i = 0; i < rrt->dimensions_defined; i++) {
|
|
GstMpegtsAtscRRTDimension *dim;
|
|
guint8 tmp;
|
|
guint j = 0;
|
|
|
|
dim = g_new0 (GstMpegtsAtscRRTDimension, 1);
|
|
g_ptr_array_add (rrt->dimensions, dim);
|
|
|
|
text_length = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
dim->names = _parse_atsc_mult_string (data, text_length);
|
|
data += text_length;
|
|
|
|
tmp = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
|
|
dim->graduated_scale = tmp & 0x10;
|
|
dim->values_defined = tmp & 0x0f;
|
|
|
|
dim->values = g_ptr_array_new_full (dim->values_defined,
|
|
(GDestroyNotify) _gst_mpegts_atsc_rrt_dimension_value_free);
|
|
|
|
for (j = 0; j < dim->values_defined; j++) {
|
|
GstMpegtsAtscRRTDimensionValue *val;
|
|
|
|
val = g_new0 (GstMpegtsAtscRRTDimensionValue, 1);
|
|
g_ptr_array_add (dim->values, val);
|
|
|
|
text_length = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
val->abbrev_ratings = _parse_atsc_mult_string (data, text_length);
|
|
data += text_length;
|
|
|
|
text_length = GST_READ_UINT8 (data);
|
|
data += 1;
|
|
val->ratings = _parse_atsc_mult_string (data, text_length);
|
|
data += text_length;
|
|
}
|
|
}
|
|
|
|
descriptors_loop_length = GST_READ_UINT16_BE (data) & 0x3FF;
|
|
data += 2;
|
|
rrt->descriptors =
|
|
gst_mpegts_parse_descriptors (data, descriptors_loop_length);
|
|
|
|
return (gpointer) rrt;
|
|
}
|
|
|
|
static gboolean
|
|
_packetize_rrt (GstMpegtsSection * section)
|
|
{
|
|
const GstMpegtsAtscRRT *rrt;
|
|
guint8 *data, *pos;
|
|
gsize length;
|
|
gsize names_length;
|
|
guint i, j;
|
|
|
|
rrt = gst_mpegts_section_get_atsc_rrt (section);
|
|
|
|
if (rrt == NULL)
|
|
return FALSE;
|
|
|
|
names_length = _get_atsc_mult_string_packetized_length (rrt->names);
|
|
|
|
/* 8 byte common section fields
|
|
* 1 byte protocol version
|
|
* 1 byte rating_region_name_length
|
|
* name_length bytes
|
|
* 1 byte dimensions_defined
|
|
* 2 byte reserved / descriptors_length
|
|
* 4 byte CRC
|
|
*/
|
|
length = names_length + 17;
|
|
|
|
for (i = 0; i < rrt->dimensions->len; i++) {
|
|
GstMpegtsAtscRRTDimension *dim = g_ptr_array_index (rrt->dimensions, i);
|
|
|
|
/* 1 byte dimension_name_length
|
|
* 1 byte reserved / graduated_scale / values_defined
|
|
*/
|
|
length += 2;
|
|
length += _get_atsc_mult_string_packetized_length (dim->names);
|
|
for (j = 0; j < dim->values->len; j++) {
|
|
GstMpegtsAtscRRTDimensionValue *val = g_ptr_array_index (dim->values, j);
|
|
|
|
/* 1 byte abbrev_rating_value_length
|
|
* 1 byte rating_value_length
|
|
*/
|
|
length += 2;
|
|
length += _get_atsc_mult_string_packetized_length (val->abbrev_ratings);
|
|
length += _get_atsc_mult_string_packetized_length (val->ratings);
|
|
}
|
|
}
|
|
|
|
if (rrt->descriptors) {
|
|
for (i = 0; i < rrt->descriptors->len; i++) {
|
|
GstMpegtsDescriptor *descriptor = g_ptr_array_index (rrt->descriptors, i);
|
|
length += descriptor->length + 2;
|
|
}
|
|
}
|
|
|
|
if (length > 1024) {
|
|
GST_WARNING ("RRT size can not exceed 1024");
|
|
return FALSE;
|
|
}
|
|
|
|
_packetize_common_section (section, length);
|
|
|
|
data = section->data + 8;
|
|
|
|
/* protocol_version - 8 bit */
|
|
GST_WRITE_UINT8 (data, rrt->protocol_version);
|
|
data += 1;
|
|
|
|
/* rating_region_name_length - 8 bit */
|
|
GST_WRITE_UINT8 (data, names_length);
|
|
data += 1;
|
|
|
|
_packetize_atsc_mult_string (rrt->names, &data);
|
|
|
|
for (i = 0; i < rrt->dimensions->len; i++) {
|
|
GstMpegtsAtscRRTDimension *dim = g_ptr_array_index (rrt->dimensions, i);
|
|
|
|
/* dimension_name_length - 8 bit */
|
|
GST_WRITE_UINT8 (data,
|
|
_get_atsc_mult_string_packetized_length (dim->names));
|
|
data += 1;
|
|
|
|
_packetize_atsc_mult_string (rrt->names, &data);
|
|
|
|
/* 3 bit reserved / 1 bit graduated_scale / 4 bit values_defined */
|
|
GST_WRITE_UINT8 (data,
|
|
0xe0 | ((dim->graduated_scale ? 1 : 0) << 4) | (dim->
|
|
values_defined & 0x0f));
|
|
data += 1;
|
|
|
|
for (j = 0; j < dim->values->len; j++) {
|
|
GstMpegtsAtscRRTDimensionValue *val = g_ptr_array_index (dim->values, j);
|
|
|
|
/* abbrev_rating_value_length - 8 bit */
|
|
GST_WRITE_UINT8 (data,
|
|
_get_atsc_mult_string_packetized_length (val->abbrev_ratings));
|
|
data += 1;
|
|
|
|
_packetize_atsc_mult_string (val->abbrev_ratings, &data);
|
|
|
|
/* rating_value_length - 8 bit */
|
|
GST_WRITE_UINT8 (data,
|
|
_get_atsc_mult_string_packetized_length (val->ratings));
|
|
data += 1;
|
|
|
|
_packetize_atsc_mult_string (val->ratings, &data);
|
|
}
|
|
}
|
|
|
|
/* 6 bit reserved, 10 bit descriptor_length uimsbf */
|
|
pos = data;
|
|
*data++ = 0xFC;
|
|
*data++ = 0x00;
|
|
|
|
_packetize_descriptor_array (rrt->descriptors, &data);
|
|
|
|
/* Go back and update the descriptor length */
|
|
GST_WRITE_UINT16_BE (pos, (data - pos - 2) | 0xFC00);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_mpegts_section_section_from_atsc_rrt:
|
|
* @rrt: (transfer full): a #GstMpegtsAtscRRT to create the #GstMpegtsSection from
|
|
*
|
|
* Returns: (transfer full): the #GstMpegtsSection
|
|
* Since: 1.18
|
|
*/
|
|
GstMpegtsSection *
|
|
gst_mpegts_section_from_atsc_rrt (GstMpegtsAtscRRT * rrt)
|
|
{
|
|
GstMpegtsSection *section;
|
|
|
|
g_return_val_if_fail (rrt != NULL, NULL);
|
|
|
|
section = _gst_mpegts_section_init (0x1ffb,
|
|
GST_MTS_TABLE_ID_ATSC_RATING_REGION);
|
|
|
|
/* FIXME random rating_region, what should be the default? */
|
|
section->subtable_extension = 0xff01;
|
|
section->cached_parsed = (gpointer) rrt;
|
|
section->packetizer = _packetize_rrt;
|
|
section->destroy_parsed = (GDestroyNotify) _gst_mpegts_atsc_rrt_free;
|
|
|
|
return section;
|
|
}
|
|
|
|
/**
|
|
* gst_mpegts_section_get_atsc_rrt:
|
|
* @section: a #GstMpegtsSection of type %GST_MPEGTS_SECTION_ATSC_RRT
|
|
*
|
|
* Returns the #GstMpegtsAtscRRT contained in the @section.
|
|
*
|
|
* Returns: The #GstMpegtsAtscRRT contained in the section, or %NULL if an error
|
|
* happened.
|
|
* Since: 1.18
|
|
*/
|
|
const GstMpegtsAtscRRT *
|
|
gst_mpegts_section_get_atsc_rrt (GstMpegtsSection * section)
|
|
{
|
|
g_return_val_if_fail (section->section_type == GST_MPEGTS_SECTION_ATSC_RRT,
|
|
NULL);
|
|
g_return_val_if_fail (section->cached_parsed || section->data, NULL);
|
|
|
|
if (!section->cached_parsed)
|
|
section->cached_parsed =
|
|
__common_section_checks (section, 17, _parse_rrt,
|
|
(GDestroyNotify) _gst_mpegts_atsc_rrt_free);
|
|
|
|
return (const GstMpegtsAtscRRT *) section->cached_parsed;
|
|
}
|
|
|
|
/**
|
|
* gst_mpegts_section_atsc_rrt_dimension_value_new:
|
|
*
|
|
* Returns: (transfer full): #GstMpegtsAtscRRTDimensionValue
|
|
* Since: 1.18
|
|
*/
|
|
GstMpegtsAtscRRTDimensionValue *
|
|
gst_mpegts_atsc_rrt_dimension_value_new (void)
|
|
{
|
|
GstMpegtsAtscRRTDimensionValue *val;
|
|
|
|
val = g_new0 (GstMpegtsAtscRRTDimensionValue, 1);
|
|
val->abbrev_ratings = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
_gst_mpegts_atsc_mult_string_free);
|
|
val->ratings = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
_gst_mpegts_atsc_mult_string_free);
|
|
|
|
return val;
|
|
}
|
|
|
|
/**
|
|
* gst_mpegts_section_atsc_rrt_dimension_new:
|
|
*
|
|
* Returns: (transfer full): #GstMpegtsAtscRRTDimension
|
|
* Since: 1.18
|
|
*/
|
|
GstMpegtsAtscRRTDimension *
|
|
gst_mpegts_atsc_rrt_dimension_new (void)
|
|
{
|
|
GstMpegtsAtscRRTDimension *dim;
|
|
|
|
dim = g_new0 (GstMpegtsAtscRRTDimension, 1);
|
|
dim->names = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
_gst_mpegts_atsc_mult_string_free);
|
|
dim->values = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
_gst_mpegts_atsc_rrt_dimension_value_free);
|
|
|
|
return dim;
|
|
}
|
|
|
|
/**
|
|
* gst_mpegts_section_atsc_rrt_new:
|
|
*
|
|
* Returns: (transfer full): #GstMpegtsAtscRRT
|
|
* Since: 1.18
|
|
*/
|
|
GstMpegtsAtscRRT *
|
|
gst_mpegts_atsc_rrt_new (void)
|
|
{
|
|
GstMpegtsAtscRRT *rrt;
|
|
|
|
rrt = g_new0 (GstMpegtsAtscRRT, 1);
|
|
rrt->names = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
_gst_mpegts_atsc_mult_string_free);
|
|
rrt->dimensions = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
_gst_mpegts_atsc_rrt_dimension_free);
|
|
rrt->descriptors = g_ptr_array_new_with_free_func ((GDestroyNotify)
|
|
gst_mpegts_descriptor_free);
|
|
|
|
return rrt;
|
|
}
|