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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-24 17:20:36 +00:00
flv: Add support for muxing some tags
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parent
51e01d6bb5
commit
d780d5f095
2 changed files with 227 additions and 8 deletions
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@ -31,10 +31,6 @@
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* </refsect2>
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*/
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/* TODO:
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* - Write metadata for the file, see FLV spec page 13
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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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@ -76,7 +72,19 @@ static GstStaticPadTemplate audiosink_templ = GST_STATIC_PAD_TEMPLATE ("audio",
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"audio/x-speex, channels = (int) { 1, 2 }, rate = (int) { 5512, 11025, 22050, 44100 };")
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);
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GST_BOILERPLATE (GstFlvMux, gst_flv_mux, GstElement, GST_TYPE_ELEMENT);
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#define _do_init(type) \
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G_STMT_START{ \
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static const GInterfaceInfo tag_setter_info = { \
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NULL, \
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NULL, \
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NULL \
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}; \
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g_type_add_interface_static (type, GST_TYPE_TAG_SETTER, \
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&tag_setter_info); \
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}G_STMT_END
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GST_BOILERPLATE_FULL (GstFlvMux, gst_flv_mux, GstElement, GST_TYPE_ELEMENT,
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_do_init);
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static void gst_flv_mux_finalize (GObject * object);
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static GstFlowReturn
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@ -171,6 +179,10 @@ gst_flv_mux_reset (GstElement * element)
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gst_collect_pads_remove_pad (mux->collect, cpad->collect.pad);
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}
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if (mux->tags)
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gst_tag_list_free (mux->tags);
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mux->tags = NULL;
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mux->state = GST_FLV_MUX_STATE_HEADER;
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}
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@ -199,9 +211,20 @@ gst_flv_mux_handle_sink_event (GstPad * pad, GstEvent * event)
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gboolean ret = TRUE;
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_TAG:
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/* TODO do something with the tags */
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case GST_EVENT_TAG:{
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GstTagList *tags;
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if (!mux->tags)
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mux->tags = gst_tag_list_new ();
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gst_event_parse_tag (event, &tags);
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if (tags) {
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gst_tag_list_insert (mux->tags, tags,
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gst_tag_setter_get_tag_merge_mode (GST_TAG_SETTER (mux)));
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}
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break;
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}
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case GST_EVENT_NEWSEGMENT:
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/* We don't support NEWSEGMENT events */
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ret = FALSE;
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@ -504,11 +527,201 @@ gst_flv_mux_release_pad (GstElement * element, GstPad * pad)
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gst_element_remove_pad (element, pad);
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}
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static GstFlowReturn
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gst_flv_mux_write_metadata (GstFlvMux * mux)
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{
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GstTagList *merged_tags;
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const GstTagList *user_tags;
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GstFlowReturn ret = GST_FLOW_OK;
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GstBuffer *script_tag, *tmp;
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guint8 *data;
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gint i, n_tags, tags_written = 0;
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user_tags = gst_tag_setter_get_tag_list (GST_TAG_SETTER (mux));
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GST_DEBUG_OBJECT (mux, "upstream tags = %" GST_PTR_FORMAT, mux->tags);
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GST_DEBUG_OBJECT (mux, "user-set tags = %" GST_PTR_FORMAT, user_tags);
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merged_tags = gst_tag_list_merge (user_tags, mux->tags,
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gst_tag_setter_get_tag_merge_mode (GST_TAG_SETTER (mux)));
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if (!merged_tags) {
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GST_DEBUG_OBJECT (mux, "No tags to write");
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return GST_FLOW_OK;
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}
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GST_DEBUG_OBJECT (mux, "merged tags = %" GST_PTR_FORMAT, merged_tags);
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script_tag = gst_buffer_new_and_alloc (11);
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data = GST_BUFFER_DATA (script_tag);
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data[0] = 18;
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/* Data size, unknown for now */
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data[1] = 0;
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data[2] = 0;
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data[3] = 0;
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/* Timestamp */
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data[4] = data[5] = data[6] = data[7] = 0;
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/* Stream ID */
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data[8] = data[9] = data[10] = 0;
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tmp = gst_buffer_new_and_alloc (13);
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data = GST_BUFFER_DATA (tmp);
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data[0] = 2; /* string */
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data[1] = 0;
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data[2] = 0x0a; /* length 10 */
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memcpy (&data[3], "onMetaData", sizeof ("onMetaData"));
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script_tag = gst_buffer_join (script_tag, tmp);
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n_tags = gst_structure_n_fields ((GstStructure *) merged_tags);
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tmp = gst_buffer_new_and_alloc (5);
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data = GST_BUFFER_DATA (tmp);
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data[0] = 8; /* ECMA array */
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GST_WRITE_UINT32_BE (data + 1, n_tags);
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script_tag = gst_buffer_join (script_tag, tmp);
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for (i = 0; i < n_tags; i++) {
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const gchar *tag_name =
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gst_structure_nth_field_name ((const GstStructure *) merged_tags, i);
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if (!strcmp (tag_name, GST_TAG_DURATION)) {
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gdouble d;
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guint64 dur;
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if (!gst_tag_list_get_uint64 (merged_tags, GST_TAG_DURATION, &dur))
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continue;
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d = gst_guint64_to_gdouble (dur);
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d /= (gdouble) GST_SECOND;
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tmp = gst_buffer_new_and_alloc (2 + 8 + 1 + 8);
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data = GST_BUFFER_DATA (tmp);
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data[0] = 0; /* 8 bytes name */
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data[1] = 8;
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memcpy (&data[2], "duration", sizeof ("duration"));
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data[10] = 0; /* double */
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GST_WRITE_DOUBLE_BE (data + 11, d);
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script_tag = gst_buffer_join (script_tag, tmp);
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tags_written++;
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} else if (!strcmp (tag_name, GST_TAG_ARTIST) ||
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!strcmp (tag_name, GST_TAG_TITLE)) {
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gchar *s;
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const gchar *t;
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if (!strcmp (tag_name, GST_TAG_ARTIST))
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t = "creator";
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else if (!strcmp (tag_name, GST_TAG_TITLE))
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t = "title";
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if (!gst_tag_list_get_string (merged_tags, tag_name, &s))
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continue;
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tmp = gst_buffer_new_and_alloc (2 + strlen (t) + 1 + 2 + strlen (s));
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data = GST_BUFFER_DATA (tmp);
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data[0] = 0; /* tag name length */
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data[1] = strlen (t);
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memcpy (&data[2], t, strlen (t));
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data[2 + strlen (t)] = 2; /* string */
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data[3 + strlen (t)] = (strlen (s) >> 8) & 0xff;
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data[4 + strlen (t)] = (strlen (s)) & 0xff;
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memcpy (&data[5 + strlen (t)], s, strlen (s));
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script_tag = gst_buffer_join (script_tag, tmp);
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g_free (s);
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tags_written++;
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}
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}
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{
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const gchar *s = "GStreamer FLV muxer";
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tmp = gst_buffer_new_and_alloc (2 + 15 + 1 + 2 + strlen (s));
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data = GST_BUFFER_DATA (tmp);
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data[0] = 0; /* 15 bytes name */
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data[1] = 15;
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memcpy (&data[2], "metadatacreator", sizeof ("metadatacreator"));
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data[17] = 2; /* string */
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data[18] = (strlen (s) >> 8) & 0xff;
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data[19] = (strlen (s)) & 0xff;
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memcpy (&data[20], s, strlen (s));
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script_tag = gst_buffer_join (script_tag, tmp);
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tags_written++;
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}
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{
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GTimeVal tv = { 0, };
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time_t secs;
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struct tm *tm;
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gchar *s;
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static const gchar *weekdays[] = {
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"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
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};
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static const gchar *months[] = {
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"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
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"Aug", "Sep", "Oct", "Nov", "Dec"
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};
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g_get_current_time (&tv);
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secs = tv.tv_sec;
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tm = gmtime (&secs);
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s = g_strdup_printf ("%s %s %d %d:%d:%d %d", weekdays[tm->tm_wday],
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months[tm->tm_mon], tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec,
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tm->tm_year + 1900);
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tmp = gst_buffer_new_and_alloc (2 + 12 + 1 + 2 + strlen (s));
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data = GST_BUFFER_DATA (tmp);
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data[0] = 0; /* 12 bytes name */
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data[1] = 12;
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memcpy (&data[2], "creationdate", sizeof ("creationdate"));
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data[14] = 2; /* string */
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data[15] = (strlen (s) >> 8) & 0xff;
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data[16] = (strlen (s)) & 0xff;
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memcpy (&data[17], s, strlen (s));
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script_tag = gst_buffer_join (script_tag, tmp);
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g_free (s);
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tags_written++;
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}
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tmp = gst_buffer_new_and_alloc (2 + 0 + 1);
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data = GST_BUFFER_DATA (tmp);
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data[0] = 0; /* 0 byte size */
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data[1] = 0;
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data[2] = 9; /* end marker */
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script_tag = gst_buffer_join (script_tag, tmp);
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tags_written++;
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tmp = gst_buffer_new_and_alloc (4);
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data = GST_BUFFER_DATA (tmp);
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GST_WRITE_UINT32_BE (data, GST_BUFFER_SIZE (script_tag));
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script_tag = gst_buffer_join (script_tag, tmp);
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data = GST_BUFFER_DATA (script_tag);
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data[1] = ((GST_BUFFER_SIZE (script_tag) - 11 - 4) >> 16) & 0xff;
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data[2] = ((GST_BUFFER_SIZE (script_tag) - 11 - 4) >> 8) & 0xff;
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data[3] = ((GST_BUFFER_SIZE (script_tag) - 11 - 4) >> 0) & 0xff;
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GST_WRITE_UINT32_BE (data + 11 + 13 + 1, tags_written);
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gst_buffer_set_caps (script_tag, GST_PAD_CAPS (mux->srcpad));
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ret = gst_pad_push (mux->srcpad, script_tag);
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gst_tag_list_free (merged_tags);
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return ret;
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}
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static GstFlowReturn
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gst_flv_mux_write_header (GstFlvMux * mux)
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{
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GstBuffer *header = gst_buffer_new_and_alloc (9 + 4);
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guint8 *data = GST_BUFFER_DATA (header);
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GstFlowReturn ret;
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if (GST_PAD_CAPS (mux->srcpad) == NULL) {
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GstCaps *caps = gst_caps_new_simple ("video/x-flv", NULL);
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@ -528,7 +741,11 @@ gst_flv_mux_write_header (GstFlvMux * mux)
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GST_WRITE_UINT32_BE (data + 9, 0); /* previous tag size */
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return gst_pad_push (mux->srcpad, header);
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ret = gst_pad_push (mux->srcpad, header);
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if (ret != GST_FLOW_OK)
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return ret;
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return gst_flv_mux_write_metadata (mux);
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}
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static GstFlowReturn
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@ -74,6 +74,8 @@ typedef struct _GstFlvMux {
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GstFlvMuxState state;
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gboolean have_audio;
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gboolean have_video;
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GstTagList *tags;
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} GstFlvMux;
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typedef struct _GstFlvMuxClass {
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