--- /dev/null
+/*
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
+ * License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * The Original Code is Fluendo MPEG Demuxer plugin.
+ *
+ * The Initial Developer of the Original Code is Fluendo, S.L.
+ * Portions created by Fluendo, S.L. are Copyright (C) 2005
+ * Fluendo, S.L. All Rights Reserved.
+ *
+ * Contributor(s): Wim Taymans <wim@fluendo.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * the GNU Lesser General Public License Version 2 or later (the "LGPL"),
+ * in which case the provisions of the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of the MPL or the LGPL.
+ */
+
+#include <string.h>
+
+#include <gst/gst.h>
+
+#include "gstmpegdesc.h"
+
+GST_DEBUG_CATEGORY (gstflumpegdesc_debug);
+#define GST_CAT_DEFAULT (gstflumpegdesc_debug)
+
+void
+gst_mpeg_descriptor_free (GstMPEGDescriptor * desc)
+{
+ g_return_if_fail (desc != NULL);
+
+ g_free (desc);
+}
+
+static guint
+gst_mpeg_descriptor_parse_1 (guint8 * data, guint size)
+{
+ guint8 tag;
+ guint8 length;
+
+ /* need at least 2 bytes for tag and length */
+ if (size < 2)
+ return 0;
+
+ tag = *data++;
+ length = *data++;
+ size -= 2;
+
+ GST_DEBUG ("tag: 0x%02x, length: %d", tag, length);
+
+ if (length > size)
+ return 0;
+
+ return length + 2;;
+}
+
+GstMPEGDescriptor *
+gst_mpeg_descriptor_parse (guint8 * data, guint size)
+{
+ guint8 *current;
+ guint consumed, total, n_desc;
+ GstMPEGDescriptor *result;
+
+ g_return_val_if_fail (data != NULL, NULL);
+
+ current = data;
+ total = 0;
+ n_desc = 0;
+
+ do {
+ consumed = gst_mpeg_descriptor_parse_1 (current, size);
+
+ if (consumed > 0) {
+ current += consumed;
+ total += consumed;
+ size -= consumed;
+ n_desc++;
+ }
+ }
+ while (consumed > 0);
+
+ GST_DEBUG ("parsed %d descriptors", n_desc);
+
+ if (total == 0)
+ return NULL;
+
+ result = g_malloc (sizeof (GstMPEGDescriptor) + total);
+ result->n_desc = n_desc;
+ result->data_length = total;
+ result->data = ((guint8 *) result) + sizeof (GstMPEGDescriptor);
+
+ memcpy (result->data, data, total);
+
+ return result;
+}
+
+guint
+gst_mpeg_descriptor_n_desc (GstMPEGDescriptor * desc)
+{
+ g_return_val_if_fail (desc != NULL, 0);
+
+ return desc->n_desc;
+}
+
+guint8 *
+gst_mpeg_descriptor_find (GstMPEGDescriptor * desc, gint tag)
+{
+ gint length;
+ guint8 *current;
+ guint size;
+
+ g_return_val_if_fail (desc != NULL, NULL);
+
+ current = desc->data;
+ length = desc->data_length;
+
+ while (length > 0) {
+ if (DESC_TAG (current) == tag)
+ return current;
+
+ size = DESC_LENGTH (current) + 2;
+
+ current += size;
+ length -= size;
+ }
+ return NULL;
+}
+
+/* array needs freeing afterwards */
+GArray *
+gst_mpeg_descriptor_find_all (GstMPEGDescriptor * desc, gint tag)
+{
+ GArray *all;
+
+ gint length;
+ guint8 *current;
+ guint size;
+
+ g_return_val_if_fail (desc != NULL, NULL);
+ all = g_array_new (TRUE, TRUE, sizeof (guint8 *));
+
+ current = desc->data;
+ length = desc->data_length;
+
+ while (length > 0) {
+ if (DESC_TAG (current) == tag)
+ g_array_append_val (all, current);
+ size = DESC_LENGTH (current) + 2;
+
+ current += size;
+ length -= size;
+ }
+
+ return all;
+}
+
+guint8 *
+gst_mpeg_descriptor_nth (GstMPEGDescriptor * desc, guint i)
+{
+ gint length;
+ guint8 *current;
+ guint size;
+
+ g_return_val_if_fail (desc != NULL, NULL);
+
+ if (i > desc->n_desc)
+ return NULL;
+
+ current = desc->data;
+ length = desc->data_length;
+
+ while (length > 0) {
+ if (i == 0)
+ return current;
+
+ size = DESC_LENGTH (current) + 2;
+
+ current += size;
+ length -= size;
+ i--;
+
+ }
+ return NULL;
+}
--- /dev/null
+/*
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
+ * License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * The Original Code is Fluendo MPEG Demuxer plugin.
+ *
+ * The Initial Developer of the Original Code is Fluendo, S.L.
+ * Portions created by Fluendo, S.L. are Copyright (C) 2005
+ * Fluendo, S.L. All Rights Reserved.
+ *
+ * Contributor(s): Wim Taymans <wim@fluendo.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * the GNU Lesser General Public License Version 2 or later (the "LGPL"),
+ * in which case the provisions of the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of the MPL or the LGPL.
+ */
+
+#ifndef __GST_MPEG_DESC_H__
+#define __GST_MPEG_DESC_H__
+
+#include <glib.h>
+/*
+ * descriptor_tag TS PS Identification
+ * 0 n/a n/a Reserved
+ * 1 n/a n/a Reserved
+ * 2 X X video_stream_descriptor
+ * 3 X X audio_stream_descriptor
+ * 4 X X hierarchy_descriptor
+ * 5 X X registration_descriptor
+ * 6 X X data_stream_alignment_descriptor
+ * 7 X X target_background_grid_descriptor
+ * 8 X X video_window_descriptor
+ * 9 X X CA_descriptor
+ * 10 X X ISO_639_language_descriptor
+ * 11 X X system_clock_descriptor
+ * 12 X X multiplex_buffer_utilization_descriptor
+ * 13 X X copyright_descriptor
+ * 14 X maximum bitrate descriptor
+ * 15 X X private data indicator descriptor
+ * 16 X X smoothing buffer descriptor
+ * 17 X STD_descriptor
+ * 18 X X IBP descriptor
+ * 19-63 n/a n/a ITU-T Rec. H.222.0 | ISO/IEC 13818-1 Reserved
+ * 64-255 n/a n/a User Private
+ */
+#define DESC_VIDEO_STREAM 2
+#define DESC_AUDIO_STREAM 3
+#define DESC_HIERARCHY 4
+#define DESC_REGISTRATION 5
+#define DESC_DATA_STREAM_ALIGNMENT 6
+#define DESC_TARGET_BACKGROUND_GRID 7
+#define DESC_VIDEO_WINDOW 8
+#define DESC_CA 9
+#define DESC_ISO_639_LANGUAGE 10
+#define DESC_SYSTEM_CLOCK 11
+#define DESC_MULTIPLEX_BUFFER_UTILISATION 12
+#define DESC_COPYRIGHT 13
+#define DESC_MAXIMUM_BITRATE 14
+#define DESC_PRIVATE_DATA_INDICATOR 15
+#define DESC_SMOOTHING_BUFFER 16
+#define DESC_STD 17
+#define DESC_IBP 18
+
+#define DESC_DIRAC_TC_PRIVATE 0xAC
+
+/* DVB tags */
+#define DESC_DVB_NETWORK_NAME 0x40
+#define DESC_DVB_SERVICE_LIST 0x41
+#define DESC_DVB_STUFFING 0x42
+#define DESC_DVB_SATELLITE_DELIVERY_SYSTEM 0x43
+#define DESC_DVB_CABLE_DELIVERY_SYSTEM 0x44
+#define DESC_DVB_VBI_DATA 0x45
+#define DESC_DVB_VBI_TELETEXT 0x46
+#define DESC_DVB_BOUQUET_NAME 0x47
+#define DESC_DVB_SERVICE 0x48
+#define DESC_DVB_COUNTRY_AVAILABILITY 0x49
+#define DESC_DVB_LINKAGE 0x4A
+#define DESC_DVB_NVOD_REFERENCE 0x4B
+#define DESC_DVB_TIME_SHIFTED_SERVICE 0x4C
+#define DESC_DVB_SHORT_EVENT 0x4D
+#define DESC_DVB_EXTENDED_EVENT 0x4E
+#define DESC_DVB_TIME_SHIFTED_EVENT 0x4F
+#define DESC_DVB_COMPONENT 0x50
+#define DESC_DVB_MOSAIC 0x51
+#define DESC_DVB_STREAM_IDENTIFIER 0x52
+#define DESC_DVB_CA_IDENTIFIER 0x53
+#define DESC_DVB_CONTENT 0x54
+#define DESC_DVB_PARENTAL_RATING 0x55
+#define DESC_DVB_TELETEXT 0x56
+#define DESC_DVB_TELEPHONE 0x57
+#define DESC_DVB_LOCAL_TIME_OFFSET 0x58
+#define DESC_DVB_SUBTITLING 0x59
+#define DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM 0x5A
+#define DESC_DVB_MULTILINGUAL_NETWORK_NAME 0x5B
+#define DESC_DVB_MULTILINGUAL_BOUQUET_NAME 0x5C
+#define DESC_DVB_MULTILINGUAL_SERVICE_NAME 0x5D
+#define DESC_DVB_MULTILINGUAL_COMPONENT 0x5E
+#define DESC_DVB_PRIVATE_DATA 0x5F
+#define DESC_DVB_SERVICE_MOVE 0x60
+#define DESC_DVB_SHORT_SMOOTHING_BUFFER 0x61
+#define DESC_DVB_FREQUENCY_LIST 0x62
+#define DESC_DVB_PARTIAL_TRANSPORT_STREAM 0x63
+#define DESC_DVB_DATA_BROADCAST 0x64
+#define DESC_DVB_SCRAMBLING 0x65
+#define DESC_DVB_DATA_BROADCAST_ID 0x66
+#define DESC_DVB_TRANSPORT_STREAM 0x67
+#define DESC_DVB_DSNG 0x68
+#define DESC_DVB_PDC 0x69
+#define DESC_DVB_AC3 0x6A
+#define DESC_DVB_ANCILLARY_DATA 0x6B
+#define DESC_DVB_CELL_LIST 0x6C
+#define DESC_DVB_CELL_FREQUENCY_LINK 0x6D
+#define DESC_DVB_ANNOUNCEMENT_SUPPORT 0x6E
+#define DESC_DVB_APPLICATION_SIGNALLING 0x6F
+#define DESC_DVB_ADAPTATION_FIELD_DATA 0x70
+#define DESC_DVB_SERVICE_IDENTIFIER 0x71
+#define DESC_DVB_SERVICE_AVAILABILITY 0x72
+#define DESC_DVB_DEFAULT_AUTHORITY 0x73
+#define DESC_DVB_RELATED_CONTENT 0x74
+#define DESC_DVB_TVA_ID 0x75
+#define DESC_DVB_CONTENT_IDENTIFIER 0x76
+#define DESC_DVB_TIMESLICE_FEC_IDENTIFIER 0x77
+#define DESC_DVB_ECM_REPETITION_RATE 0x78
+#define DESC_DVB_S2_SATELLITE_DELIVERY_SYSTEM 0x79
+#define DESC_DVB_ENHANCED_AC3 0x7A
+#define DESC_DVB_DTS 0x7B
+#define DESC_DVB_AAC 0x7C
+/* 0x7D and 0x7E are reserved for future use */
+#define DESC_DVB_EXTENSION 0x7F
+/* 0x80 - 0xFE are user defined */
+/* 0xFF is forbidden */
+
+/* common for all descriptors */
+#define DESC_TAG(desc) (desc[0])
+#define DESC_LENGTH(desc) (desc[1])
+
+/* video_stream_descriptor */
+#define DESC_VIDEO_STREAM_multiple_framerate_flag(desc) (((desc)[2] & 0x80) == 0x80)
+#define DESC_VIDEO_STREAM_frame_rate_code(desc) (((desc)[2] & 0x38) >> 3)
+#define DESC_VIDEO_STREAM_MPEG_1_only_flag(desc) (((desc)[2] & 0x04) == 0x04)
+#define DESC_VIDEO_STREAM_constrained_parameter_flag(desc) (((desc)[2] & 0x02) == 0x02)
+#define DESC_VIDEO_STREAM_still_picture_flag(desc) (((desc)[2] & 0x01) == 0x01)
+/* if (MPEG_1_only_flag == 1) */
+#define DESC_VIDEO_STREAM_profile_and_level_indication(desc) ((desc)[3])
+#define DESC_VIDEO_STREAM_chroma_format(desc) (((desc)[4] & 0xc0) >> 6)
+#define DESC_VIDEO_STREAM_frame_rate_extension_flag(desc) (((desc)[4] & 0x20) == 0x20)
+
+/* audio_stream_descriptor */
+#define DESC_AUDIO_STREAM_free_format_flag(desc) (((desc)[2] & 0x80) == 0x80)
+#define DESC_AUDIO_STREAM_ID(desc) (((desc)[2] & 0x40) == 0x40)
+#define DESC_AUDIO_STREAM_layer(desc) (((desc)[2] & 0x30) >> 4)
+#define DESC_AUDIO_STREAM_variable_rate_audio_indicator(desc) (((desc)[2] & 0x08) == 0x08)
+
+/* hierarchy_descriptor */
+#define DESC_HIERARCHY_hierarchy_type(desc) (((desc)[2] & 0x0f))
+#define DESC_HIERARCHY_hierarchy_layer_index(desc) (((desc)[3] & 0x3f))
+#define DESC_HIERARCHY_hierarchy_embedded_layer_index(desc) (((desc)[4] & 0x3f))
+#define DESC_HIERARCHY_hierarchy_channel(desc) (((desc)[5] & 0x3f))
+
+/* registration_descriptor */
+#define DESC_REGISTRATION_format_identifier(desc) (GST_READ_UINT32_BE ((desc)+2))
+#define DESC_REGISTRATION_additional_ident_info_len(desc) ((desc)[1] - 4)
+#define DESC_REGISTRATION_additional_ident_info(desc) (&(desc)[6])
+
+/* data_stream_alignment_descriptor */
+#define DESC_DATA_STREAM_ALIGNMENT_alignment_type(desc) ((desc)[2])
+
+/* target_background_grid_descriptor */
+#define DESC_TARGET_BACKGROUND_GRID_horizontal_size(desc) (GST_READ_UINT16_BE ((desc)+2) >> 2)
+#define DESC_TARGET_BACKGROUND_GRID_vertical_size(desc) ((GST_READ_UINT32_BE ((desc)+2) & 0x0003fff0) >> 4)
+#define DESC_TARGET_BACKGROUND_GRID_aspect_ratio_information(desc) ((desc)[5] & 0x0f)
+
+/* video_window_descriptor */
+#define DESC_VIDEO_WINDOW_horizontal_offset(desc) (GST_READ_UINT16_BE ((desc)+2) >> 2)
+#define DESC_VIDEO_WINDOW_vertical_offset(desc) ((GST_READ_UINT32_BE ((desc)+2) & 0x0003fff0) >> 4)
+#define DESC_VIDEO_WINDOW_window_priority(desc) ((desc)[5] & 0x0f)
+
+/* CA_descriptor */
+#define DESC_CA_system_ID(desc) (GST_READ_UINT16_BE ((desc)+2))
+#define DESC_CA_PID(desc) (GST_READ_UINT16_BE ((desc)+2) & 0x1fff)
+
+/* ISO_639_language_descriptor */
+#define DESC_ISO_639_LANGUAGE_codes_n(desc) ((desc[1]) >> 2)
+#define DESC_ISO_639_LANGUAGE_language_code_nth(desc,i) (&(desc[2 + (4*i)]))
+#define DESC_ISO_639_LANGUAGE_audio_type_nth(desc,i) ((desc)[5 + (4*i)])
+
+/* system_clock_descriptor */
+#define DESC_SYSTEM_CLOCK_external_clock_reference_indicator(desc) (((desc)[2] & 0x80) == 0x80)
+#define DESC_SYSTEM_CLOCK_clock_accuracy_integer(desc) ((desc)[2] & 0x3f)
+#define DESC_SYSTEM_CLOCK_clock_accuracy_exponent(desc) (((desc)[3] & 0xe0) >> 5)
+
+/* multiplex_buffer_utilization_descriptor */
+#define DESC_MULTIPLEX_BUFFER_UTILISATION_bound_valid_flag(desc) (((desc)[2] & 0x80) == 0x80)
+#define DESC_MULTIPLEX_BUFFER_UTILISATION_LTW_offset_lower_bound(desc) (GST_READ_UINT16_BE ((desc)+2) & 0x7fff)
+#define DESC_MULTIPLEX_BUFFER_UTILISATION_LTW_offset_upper_bound(desc) (GST_READ_UINT16_BE ((desc)+4) & 0x7fff)
+
+/* copyright_descriptor */
+#define DESC_COPYRIGHT_copyright_identifier(desc) (GST_READ_UINT32_BE ((desc)+2))
+#define DESC_COPYRIGHT_additional_copyright_info_len(desc) ((desc)[1] - 4)
+#define DESC_COPYRIGHT_additional_copyright_info(desc) (&(desc)[6])
+
+/* maximum_bitrate_descriptor */
+#define DESC_MAXIMUM_BITRAT_maximum_bitrate(desc) (((((guint32)desc[2]) & 0x3f) << 16) | \
+ GST_READ_UINT16_BE ((desc)+3))
+
+/* private_data_indicator_descriptor */
+#define DESC_PRIVATE_DATA_INDICATOR_indicator(desc) (GST_READ_UINT32_BE(&desc[2]))
+
+/* smoothing_buffer_descriptor */
+#define DESC_SMOOTHING_BUFFER_sb_leak_rate(desc) (((((guint32)desc[2]) & 0x3f) << 16) | \
+ GST_READ_UINT16_BE ((desc)+3))
+#define DESC_SMOOTHING_BUFFER_sb_size(desc) (((((guint32)desc[5]) & 0x3f) << 16) | \
+ GST_READ_UINT16_BE ((desc)+6))
+/* STD_descriptor */
+#define DESC_STD_leak_valid_flag(desc) (((desc)[2] & 0x01) == 0x01)
+
+/* ibp_descriptor */
+#define DESC_IBP_closed_gop_flag(desc) (((desc)[2] & 0x80) == 0x80)
+#define DESC_IBP_identical_gop_flag(desc) (((desc)[2] & 0x40) == 0x40)
+#define DESC_IBP_max_gop_length(desc) (GST_READ_UINT16_BE ((desc)+6) & 0x3fff)
+
+/* time_code descriptor */
+#define DESC_TIMECODE_video_pid(desc) (GST_READ_UINT16_BE ((desc) + 2) & 0x1fff)
+
+/* Stream identifier descriptor */
+#define DESC_DVB_STREAM_IDENTIFIER_component_tag(desc) (desc[2])
+
+/* DVB Network Name descriptor */
+#define DESC_DVB_NETWORK_NAME_length(desc) (GST_READ_UINT8((desc)+2))
+#define DESC_DVB_NETWORK_NAME_text(desc) (desc+3)
+
+/* DVB Service Descriptor */
+#define DESC_DVB_SERVICE_type(desc) (desc[2])
+#define DESC_DVB_SERVICE_provider_name_length(desc) (desc[3])
+#define DESC_DVB_SERVICE_provider_name_text(desc) (desc+4)
+#define DESC_DVB_SERVICE_name_length(desc) (desc[4 + DESC_DVB_SERVICE_provider_name_length(desc)])
+#define DESC_DVB_SERVICE_name_text(desc) (desc + 5 + DESC_DVB_SERVICE_provider_name_length(desc))
+
+/* DVB Component Descriptor */
+#define DESC_DVB_COMPONENT_stream_content(desc) (desc[2] & 0x0F)
+#define DESC_DVB_COMPONENT_type(desc) (desc[3])
+#define DESC_DVB_COMPONENT_tag(desc) (desc[4])
+#define DESC_DVB_COMPONENT_language(desc) (desc + 5)
+
+/* DVB Bouquet Name Descriptor */
+#define DESC_DVB_BOUQUET_NAME_text(desc) (desc + 2)
+
+/* DVB Short Event Descriptor */
+#define DESC_DVB_SHORT_EVENT_name_text(desc) (desc + 6)
+#define DESC_DVB_SHORT_EVENT_name_length(desc) (desc[5])
+#define DESC_DVB_SHORT_EVENT_description_text(desc) (desc + 6 + DESC_DVB_SHORT_EVENT_name_length(desc) + 1)
+#define DESC_DVB_SHORT_EVENT_description_length(desc) (desc[6 + DESC_DVB_SHORT_EVENT_name_length(desc)])
+
+typedef struct {
+ guint n_desc;
+ guint8 data_length;
+ guint8 *data;
+} GstMPEGDescriptor;
+
+GstMPEGDescriptor* gst_mpeg_descriptor_parse (guint8 *data, guint size);
+void gst_mpeg_descriptor_free (GstMPEGDescriptor *desc);
+
+guint gst_mpeg_descriptor_n_desc (GstMPEGDescriptor *desc);
+guint8* gst_mpeg_descriptor_find (GstMPEGDescriptor *desc, gint tag);
+GArray* gst_mpeg_descriptor_find_all (GstMPEGDescriptor * desc, gint tag);
+
+guint8* gst_mpeg_descriptor_nth (GstMPEGDescriptor *desc, guint i);
+
+#endif /* __GST_MPEG_DESC_H__ */
projects / platform / upstream / gstreamer.git / commitdiff