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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-24 01:00:37 +00:00
matroska: add GstToc support for muxer
This commit is contained in:
Alexander Saprykin
Stefan Sauer
parent
80f8a506be
commit
113ba4ac3c
2 changed files with 291 additions and 15 deletions
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@ -56,6 +56,8 @@
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#include "matroska-mux.h"
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#include "matroska-ids.h"
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#define GST_MATROSKA_MUX_CHAPLANG "und"
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GST_DEBUG_CATEGORY_STATIC (matroskamux_debug);
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#define GST_CAT_DEFAULT matroskamux_debug
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@ -273,8 +275,10 @@ static void
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gst_matroska_mux_add_interfaces (GType type)
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{
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static const GInterfaceInfo tag_setter_info = { NULL, NULL, NULL };
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static const GInterfaceInfo toc_setter_info = { NULL, NULL, NULL };
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g_type_add_interface_static (type, GST_TYPE_TAG_SETTER, &tag_setter_info);
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g_type_add_interface_static (type, GST_TYPE_TOC_SETTER, &toc_setter_info);
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}
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static void
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@ -673,6 +677,13 @@ gst_matroska_mux_reset (GstElement * element)
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/* reset tags */
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gst_tag_setter_reset_tags (GST_TAG_SETTER (mux));
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mux->tags_pos = 0;
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/* reset chapters */
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gst_toc_setter_reset_toc (GST_TOC_SETTER (mux));
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mux->chapters_pos = 0;
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}
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/**
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@ -806,6 +817,30 @@ gst_matroska_mux_handle_sink_event (GstCollectPads2 * pads,
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event = NULL;
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break;
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}
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case GST_EVENT_TOC:{
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GstToc *toc;
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if (mux->chapters_pos > 0)
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break;
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GST_DEBUG_OBJECT (mux, "received toc event");
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gst_event_parse_toc (event, &toc, NULL);
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if (toc != NULL) {
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if (gst_toc_setter_get_toc (GST_TOC_SETTER (mux)) != NULL) {
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gst_toc_setter_reset_toc (GST_TOC_SETTER (mux));
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GST_INFO_OBJECT (pad, "Replacing TOC with a new one");
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}
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gst_toc_setter_set_toc (GST_TOC_SETTER (mux), toc);
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gst_toc_free (toc);
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}
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gst_event_unref (event);
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/* handled this, don't want collectpads to forward it downstream */
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event = NULL;
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break;
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}
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case GST_EVENT_NEWSEGMENT:{
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GstFormat format;
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@ -2329,6 +2364,110 @@ gst_matroska_mux_track_header (GstMatroskaMux * mux,
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context->codec_priv, context->codec_priv_size);
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}
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static void
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gst_matroska_mux_write_chapter_title (const gchar * title, GstEbmlWrite * ebml)
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{
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guint64 title_master;
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title_master =
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gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_CHAPTERDISPLAY);
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gst_ebml_write_utf8 (ebml, GST_MATROSKA_ID_CHAPSTRING, title);
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gst_ebml_write_ascii (ebml, GST_MATROSKA_ID_CHAPLANGUAGE,
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GST_MATROSKA_MUX_CHAPLANG);
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gst_ebml_write_master_finish (ebml, title_master);
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}
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static void
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gst_matroska_mux_write_chapter (GstMatroskaMux * mux, GstTocEntry * edition,
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GstTocEntry * entry, GstEbmlWrite * ebml, guint64 * master_chapters,
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guint64 * master_edition)
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{
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guint64 uid, master_chapteratom;
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GList *cur;
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GstTocEntry *cur_entry;
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guint count, i;
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gchar *title;
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gint64 start, stop;
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if (G_UNLIKELY (master_chapters != NULL && *master_chapters == 0))
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*master_chapters =
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gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_CHAPTERS);
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if (G_UNLIKELY (master_edition != NULL && *master_edition == 0)) {
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/* create uid for the parent */
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uid = gst_matroska_mux_create_uid ();
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g_free (edition->uid);
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edition->uid = g_strdup_printf ("%" G_GUINT64_FORMAT, uid);
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*master_edition =
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gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_EDITIONENTRY);
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gst_ebml_write_uint (ebml, GST_MATROSKA_ID_EDITIONUID, uid);
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gst_ebml_write_uint (ebml, GST_MATROSKA_ID_EDITIONFLAGHIDDEN, 0);
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gst_ebml_write_uint (ebml, GST_MATROSKA_ID_EDITIONFLAGDEFAULT, 0);
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gst_ebml_write_uint (ebml, GST_MATROSKA_ID_EDITIONFLAGORDERED, 0);
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}
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uid = gst_matroska_mux_create_uid ();
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gst_toc_entry_get_start_stop (entry, &start, &stop);
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master_chapteratom =
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gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_CHAPTERATOM);
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g_free (entry->uid);
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entry->uid = g_strdup_printf ("%" G_GUINT64_FORMAT, uid);
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gst_ebml_write_uint (ebml, GST_MATROSKA_ID_CHAPTERUID, uid);
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gst_ebml_write_uint (ebml, GST_MATROSKA_ID_CHAPTERTIMESTART, start);
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gst_ebml_write_uint (ebml, GST_MATROSKA_ID_CHAPTERTIMESTOP, stop);
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gst_ebml_write_uint (ebml, GST_MATROSKA_ID_CHAPTERFLAGHIDDEN, 0);
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gst_ebml_write_uint (ebml, GST_MATROSKA_ID_CHAPTERFLAGENABLED, 1);
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cur = entry->subentries;
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while (cur != NULL) {
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cur_entry = cur->data;
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gst_matroska_mux_write_chapter (mux, NULL, cur_entry, ebml, NULL, NULL);
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cur = cur->next;
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}
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if (G_LIKELY (entry->tags != NULL)) {
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count = gst_tag_list_get_tag_size (entry->tags, GST_TAG_TITLE);
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for (i = 0; i < count; ++i) {
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gst_tag_list_get_string_index (entry->tags, GST_TAG_TITLE, i, &title);
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gst_matroska_mux_write_chapter_title (title, ebml);
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g_free (title);
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}
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/* remove title tag */
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if (G_LIKELY (count > 0))
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gst_tag_list_remove_tag (entry->tags, GST_TAG_TITLE);
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}
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gst_ebml_write_master_finish (ebml, master_chapteratom);
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}
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static void
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gst_matroska_mux_write_chapter_edition (GstMatroskaMux * mux,
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GstTocEntry * entry, GstEbmlWrite * ebml, guint64 * master_chapters)
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{
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guint64 master_edition = 0;
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GList *cur;
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GstTocEntry *subentry;
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cur = entry->subentries;
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while (cur != NULL) {
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subentry = cur->data;
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gst_matroska_mux_write_chapter (mux, entry, subentry, ebml, master_chapters,
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&master_edition);
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cur = cur->next;
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}
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if (G_LIKELY (master_edition != 0))
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gst_ebml_write_master_finish (ebml, master_edition);
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}
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/**
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* gst_matroska_mux_start:
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@ -2343,6 +2482,7 @@ gst_matroska_mux_start (GstMatroskaMux * mux)
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const gchar *doctype;
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guint32 seekhead_id[] = { GST_MATROSKA_ID_SEGMENTINFO,
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GST_MATROSKA_ID_TRACKS,
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GST_MATROSKA_ID_CHAPTERS,
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GST_MATROSKA_ID_CUES,
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GST_MATROSKA_ID_TAGS,
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0
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@ -2503,6 +2643,68 @@ gst_matroska_mux_start (GstMatroskaMux * mux)
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}
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gst_ebml_write_master_finish (ebml, master);
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/* chapters */
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if (gst_toc_setter_get_toc (GST_TOC_SETTER (mux)) != NULL && !mux->streamable) {
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guint64 master_chapters = 0;
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GstTocEntry *toc_entry;
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const GstToc *toc;
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GList *cur, *to_write = NULL;
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gint64 start, stop;
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GST_DEBUG ("Writing chapters");
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toc = gst_toc_setter_get_toc (GST_TOC_SETTER (mux));
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/* check whether we have editions or chapters at the root level */
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toc_entry = toc->entries->data;
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if (toc_entry->type != GST_TOC_ENTRY_TYPE_EDITION) {
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toc_entry = gst_toc_entry_new (GST_TOC_ENTRY_TYPE_EDITION, "");
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gst_toc_entry_set_start_stop (toc_entry, -1, -1);
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/* aggregate all chapters without root edition */
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cur = toc->entries;
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while (cur != NULL) {
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toc_entry->subentries =
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g_list_prepend (toc_entry->subentries, cur->data);
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cur = cur->next;
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}
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gst_toc_entry_get_start_stop (((GstTocEntry *) toc_entry->
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subentries->data), &start, NULL);
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toc_entry->subentries = g_list_reverse (toc_entry->subentries);
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gst_toc_entry_get_start_stop (((GstTocEntry *) toc_entry->
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subentries->data), NULL, &stop);
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gst_toc_entry_set_start_stop (toc_entry, start, stop);
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to_write = g_list_append (to_write, toc_entry);
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} else {
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toc_entry = NULL;
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to_write = toc->entries;
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}
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/* finally write chapters */
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mux->chapters_pos = ebml->pos;
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cur = to_write;
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while (cur != NULL) {
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gst_matroska_mux_write_chapter_edition (mux, cur->data, ebml,
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&master_chapters);
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cur = cur->next;
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}
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/* close master element if any edition was written */
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if (G_LIKELY (master_chapters != 0))
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gst_ebml_write_master_finish (ebml, master_chapters);
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if (toc_entry != NULL) {
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g_list_free (toc_entry->subentries);
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toc_entry->subentries = NULL;
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gst_toc_entry_free (toc_entry);
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g_list_free (to_write);
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}
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}
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/* lastly, flush the cache */
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gst_ebml_write_flush_cache (ebml, FALSE, 0);
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}
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@ -2566,6 +2768,44 @@ gst_matroska_mux_write_simple_tag (const GstTagList * list, const gchar * tag,
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}
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}
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static void
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gst_matroska_mux_write_toc_entry_tags (GstMatroskaMux * mux,
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const GstTocEntry * entry, guint64 * master_tags)
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{
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guint64 master_tag, master_targets;
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GstEbmlWrite *ebml;
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GList *cur;
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ebml = mux->ebml_write;
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if (G_UNLIKELY (entry->tags != NULL && !gst_tag_list_is_empty (entry->tags))) {
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if (*master_tags == 0) {
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mux->tags_pos = ebml->pos;
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*master_tags = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_TAGS);
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}
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master_tag = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_TAG);
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master_targets =
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gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_TARGETS);
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if (entry->type == GST_TOC_ENTRY_TYPE_EDITION)
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gst_ebml_write_uint (ebml, GST_MATROSKA_ID_TARGETEDITIONUID,
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g_ascii_strtoull (entry->uid, NULL, 10));
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else
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gst_ebml_write_uint (ebml, GST_MATROSKA_ID_TARGETCHAPTERUID,
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g_ascii_strtoull (entry->uid, NULL, 10));
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gst_ebml_write_master_finish (ebml, master_targets);
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gst_tag_list_foreach (entry->tags, gst_matroska_mux_write_simple_tag, ebml);
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gst_ebml_write_master_finish (ebml, master_tag);
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}
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cur = entry->subentries;
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while (cur != NULL) {
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gst_matroska_mux_write_toc_entry_tags (mux, cur->data, master_tags);
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cur = cur->next;
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}
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}
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/**
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* gst_matroska_mux_finish:
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@ -2619,22 +2859,45 @@ gst_matroska_mux_finish (GstMatroskaMux * mux)
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/* tags */
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tags = gst_tag_setter_get_tag_list (GST_TAG_SETTER (mux));
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if (tags != NULL && !gst_tag_list_is_empty (tags)) {
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guint64 master_tags, master_tag;
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if ((tags != NULL && !gst_tag_list_is_empty (tags))
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|| gst_toc_setter_get_toc (GST_TOC_SETTER (mux)) != NULL) {
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guint64 master_tags = 0, master_tag;
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GList *cur;
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const GstToc *toc;
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GST_DEBUG_OBJECT (mux, "Writing tags");
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/* TODO: maybe limit via the TARGETS id by looking at the source pad */
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mux->tags_pos = ebml->pos;
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master_tags = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_TAGS);
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master_tag = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_TAG);
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gst_tag_list_foreach (tags, gst_matroska_mux_write_simple_tag, ebml);
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gst_ebml_write_master_finish (ebml, master_tag);
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gst_ebml_write_master_finish (ebml, master_tags);
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toc = gst_toc_setter_get_toc (GST_TOC_SETTER (mux));
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if (tags != NULL) {
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/* TODO: maybe limit via the TARGETS id by looking at the source pad */
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mux->tags_pos = ebml->pos;
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master_tags = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_TAGS);
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master_tag = gst_ebml_write_master_start (ebml, GST_MATROSKA_ID_TAG);
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if (tags != NULL)
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gst_tag_list_foreach (tags, gst_matroska_mux_write_simple_tag, ebml);
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if (toc != NULL)
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gst_tag_list_foreach (toc->tags, gst_matroska_mux_write_simple_tag,
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ebml);
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gst_ebml_write_master_finish (ebml, master_tag);
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}
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if (toc != NULL) {
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cur = toc->entries;
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while (cur != NULL) {
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gst_matroska_mux_write_toc_entry_tags (mux, cur->data, &master_tags);
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cur = cur->next;
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}
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}
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if (master_tags != 0)
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gst_ebml_write_master_finish (ebml, master_tags);
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}
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/* update seekhead. We know that:
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* - a seekhead contains 4 entries.
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* - a seekhead contains 5 entries.
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* - order of entries is as above.
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* - a seekhead has a 4-byte header + 8-byte length
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* - each entry is 2-byte master, 2-byte ID pointer,
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@ -2647,9 +2910,10 @@ gst_matroska_mux_finish (GstMatroskaMux * mux)
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mux->info_pos - mux->segment_master);
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gst_ebml_replace_uint (ebml, mux->seekhead_pos + 60,
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mux->tracks_pos - mux->segment_master);
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if (mux->index != NULL) {
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if (gst_toc_setter_get_toc (GST_TOC_SETTER (mux)) != NULL
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&& mux->chapters_pos > 0) {
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gst_ebml_replace_uint (ebml, mux->seekhead_pos + 88,
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mux->cues_pos - mux->segment_master);
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mux->chapters_pos - mux->segment_master);
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} else {
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/* void'ify */
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guint64 my_pos = ebml->pos;
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@ -2658,9 +2922,9 @@ gst_matroska_mux_finish (GstMatroskaMux * mux)
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gst_ebml_write_buffer_header (ebml, GST_EBML_ID_VOID, 26);
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gst_ebml_write_seek (ebml, my_pos);
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}
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if (tags != NULL) {
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if (mux->index != NULL) {
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gst_ebml_replace_uint (ebml, mux->seekhead_pos + 116,
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mux->tags_pos - mux->segment_master);
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mux->cues_pos - mux->segment_master);
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} else {
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/* void'ify */
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guint64 my_pos = ebml->pos;
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@ -2670,6 +2934,18 @@ gst_matroska_mux_finish (GstMatroskaMux * mux)
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gst_ebml_write_seek (ebml, my_pos);
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}
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if (tags != NULL) {
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gst_ebml_replace_uint (ebml, mux->seekhead_pos + 144,
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mux->tags_pos - mux->segment_master);
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} else {
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/* void'ify */
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guint64 my_pos = ebml->pos;
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gst_ebml_write_seek (ebml, mux->seekhead_pos + 124);
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gst_ebml_write_buffer_header (ebml, GST_EBML_ID_VOID, 26);
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gst_ebml_write_seek (ebml, my_pos);
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}
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/* loop tracks:
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* - first get the overall duration
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* (a released track may have left a duration in here)
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@ -110,6 +110,7 @@ typedef struct _GstMatroskaMux {
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guint64 segment_pos,
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seekhead_pos,
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cues_pos,
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chapters_pos,
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tags_pos,
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info_pos,
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tracks_pos,
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@ -125,7 +126,6 @@ typedef struct _GstMatroskaMux {
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/* GstForceKeyUnit event */
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GstEvent *force_key_unit_event;
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} GstMatroskaMux;
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typedef struct _GstMatroskaMuxClass {
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Reference in a new issue