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flv: Add support for muxing some tags

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This commit is contained in:
Sebastian Dröge 2009-04-29 13:03:46 +02:00
parent 51e01d6bb5
commit d780d5f095
2 changed files with 227 additions and 8 deletions
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233
gst/flv/gstflvmux.c
View file

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

2
gst/flv/gstflvmux.h
View file

@ -74,6 +74,8 @@ typedef struct _GstFlvMux {
GstFlvMuxState state;
gboolean have_audio;
gboolean have_video;
GstTagList *tags;
} GstFlvMux;
typedef struct _GstFlvMuxClass {