1 /* 2 * mpegts.h - 3 * Copyright (C) 2013 Edward Hervey 4 * 5 * Authors: 6 * Edward Hervey <edward@collabora.com> 7 * 8 * This library is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Library General Public 10 * License as published by the Free Software Foundation; either 11 * version 2 of the License, or (at your option) any later version. 12 * 13 * This library is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Library General Public License for more details. 17 * 18 * You should have received a copy of the GNU Library General Public 19 * License along with this library; if not, write to the 20 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 21 * Boston, MA 02110-1301, USA. 22 */ 23 24 #ifndef _GST_MPEGTS_PRIVATE_H_ 25 #define _GST_MPEGTS_PRIVATE_H_ 26 27 G_BEGIN_DECLS 28 29 GST_DEBUG_CATEGORY_EXTERN (mpegts_debug); 30 #define GST_CAT_DEFAULT mpegts_debug 31 32 G_GNUC_INTERNAL void __initialize_descriptors (void); 33 G_GNUC_INTERNAL guint32 _calc_crc32 (const guint8 *data, guint datalen); 34 G_GNUC_INTERNAL gchar *get_encoding_and_convert (const gchar *text, guint length); 35 G_GNUC_INTERNAL gchar *convert_lang_code (guint8 * data); 36 G_GNUC_INTERNAL guint8 *dvb_text_from_utf8 (const gchar * text, gsize *out_size); 37 G_GNUC_INTERNAL GstMpegtsDescriptor *_new_descriptor (guint8 tag, guint8 length); 38 G_GNUC_INTERNAL GstMpegtsDescriptor *_new_descriptor_with_extension (guint8 tag, 39 guint8 tag_extension, guint8 length); 40 G_GNUC_INTERNAL void _packetize_descriptor_array (GPtrArray * array, 41 guint8 ** out_data); 42 G_GNUC_INTERNAL GstMpegtsSection *_gst_mpegts_section_init (guint16 pid, guint8 table_id); 43 G_GNUC_INTERNAL void _packetize_common_section (GstMpegtsSection * section, gsize length); 44 45 typedef gpointer (*GstMpegtsParseFunc) (GstMpegtsSection *section); 46 G_GNUC_INTERNAL gpointer __common_section_checks (GstMpegtsSection *section, 47 guint minsize, 48 GstMpegtsParseFunc parsefunc, 49 GDestroyNotify destroynotify); 50 51 #define __common_desc_check_base(desc, tagtype, retval) \ 52 if (G_UNLIKELY ((desc)->data == NULL)) { \ 53 GST_WARNING ("Descriptor is empty (data field == NULL)"); \ 54 return retval; \ 55 } \ 56 if (G_UNLIKELY ((desc)->tag != (tagtype))) { \ 57 GST_WARNING ("Wrong descriptor type (Got 0x%02x, expected 0x%02x)", \ 58 (desc)->tag, tagtype); \ 59 return retval; \ 60 } \ 61 62 #define __common_desc_checks(desc, tagtype, minlen, retval) \ 63 __common_desc_check_base(desc, tagtype, retval); \ 64 if (G_UNLIKELY ((desc)->length < (minlen))) { \ 65 GST_WARNING ("Descriptor too small (Got %d, expected at least %d)", \ 66 (desc)->length, minlen); \ 67 return retval; \ 68 } 69 #define __common_desc_checks_exact(desc, tagtype, len, retval) \ 70 __common_desc_check_base(desc, tagtype, retval); \ 71 if (G_UNLIKELY ((desc)->length != (len))) { \ 72 GST_WARNING ("Wrong descriptor size (Got %d, expected %d)", \ 73 (desc)->length, len); \ 74 return retval; \ 75 } 76 77 #define __common_desc_ext_check_base(desc, tagexttype, retval) \ 78 if (G_UNLIKELY ((desc)->data == NULL)) { \ 79 GST_WARNING ("Descriptor is empty (data field == NULL)"); \ 80 return retval; \ 81 } \ 82 if (G_UNLIKELY ((desc)->tag != 0x7f) || \ 83 ((desc)->tag_extension != (tagexttype))) { \ 84 GST_WARNING ("Wrong descriptor type (Got 0x%02x, expected 0x%02x)", \ 85 (desc)->tag_extension, tagexttype); \ 86 return retval; \ 87 } 88 #define __common_desc_ext_checks(desc, tagexttype, minlen, retval) \ 89 __common_desc_ext_check_base(desc, tagexttype, retval); \ 90 if (G_UNLIKELY ((desc)->length < (minlen))) { \ 91 GST_WARNING ("Descriptor too small (Got %d, expected at least %d)", \ 92 (desc)->length, minlen); \ 93 return retval; \ 94 } 95 #define __common_desc_ext_checks_exact(desc, tagexttype, len, retval) \ 96 __common_desc_ext_check_base(desc, tagexttype, retval); \ 97 if (G_UNLIKELY ((desc)->length != (len))) { \ 98 GST_WARNING ("Wrong descriptor size (Got %d, expected %d)", \ 99 (desc)->length, len); \ 100 return retval; \ 101 } 102 103 G_END_DECLS 104 105 #endif /* _GST_MPEGTS_PRIVATE_H_ */ 106