gstreamer/gst/multipart/multipartmux.c
Andy Wingo 7ebd7b97d4 All plugins updated for element state changes.
Original commit message from CVS:
2005-09-02  Andy Wingo  <wingo@pobox.com>

* All plugins updated for element state changes.
2005-09-02 15:44:50 +00:00

603 lines
17 KiB
C

/* multipart muxer plugin for GStreamer
* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <string.h>
GST_DEBUG_CATEGORY_STATIC (gst_multipart_mux_debug);
#define GST_CAT_DEFAULT gst_multipart_mux_debug
#define GST_TYPE_MULTIPART_MUX (gst_multipart_mux_get_type())
#define GST_MULTIPART_MUX(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MULTIPART_MUX, GstMultipartMux))
#define GST_MULTIPART_MUX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MULTIPART_MUX, GstMultipartMux))
#define GST_IS_MULTIPART_MUX(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MULTIPART_MUX))
#define GST_IS_MULTIPART_MUX_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MULTIPART_MUX))
typedef struct _GstMultipartMux GstMultipartMux;
typedef struct _GstMultipartMuxClass GstMultipartMuxClass;
/* all information needed for one multipart stream */
typedef struct
{
GstPad *pad; /* reference for this pad is held by element we belong to */
GstBuffer *buffer; /* the queued buffer for this pad */
gboolean eos;
const gchar *mimetype;
guint state; /* state of the pad */
}
GstMultipartPad;
struct _GstMultipartMux
{
GstElement element;
/* pad */
GstPad *srcpad;
/* sinkpads, a GSList of GstMultipartPads */
GSList *sinkpads;
gint numpads;
/* offset in stream */
guint64 offset;
/* boundary string */
gchar *boundary;
gboolean negotiated;
};
struct _GstMultipartMuxClass
{
GstElementClass parent_class;
};
/* elementfactory information */
static GstElementDetails gst_multipart_mux_details =
GST_ELEMENT_DETAILS ("multipart muxer",
"Codec/Muxer",
"mux multipart streams",
"Wim Taymans <wim@fluendo.com>");
/* MultipartMux signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
#define DEFAULT_BOUNDARY "ThisRandomString"
enum
{
ARG_0,
ARG_BOUNDARY,
};
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("multipart/x-mixed-replace")
);
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink_%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY /* we can take anything, really */
);
static void gst_multipart_mux_base_init (gpointer g_class);
static void gst_multipart_mux_class_init (GstMultipartMuxClass * klass);
static void gst_multipart_mux_init (GstMultipartMux * multipart_mux);
static void gst_multipart_mux_loop (GstElement * element);
static gboolean gst_multipart_mux_handle_src_event (GstPad * pad,
GstEvent * event);
static GstPad *gst_multipart_mux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name);
static void gst_multipart_mux_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_multipart_mux_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_multipart_mux_change_state (GstElement *
element);
static GstElementClass *parent_class = NULL;
/*static guint gst_multipart_mux_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_multipart_mux_get_type (void)
{
static GType multipart_mux_type = 0;
if (!multipart_mux_type) {
static const GTypeInfo multipart_mux_info = {
sizeof (GstMultipartMuxClass),
gst_multipart_mux_base_init,
NULL,
(GClassInitFunc) gst_multipart_mux_class_init,
NULL,
NULL,
sizeof (GstMultipartMux),
0,
(GInstanceInitFunc) gst_multipart_mux_init,
};
multipart_mux_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstMultipartMux",
&multipart_mux_info, 0);
}
return multipart_mux_type;
}
static void
gst_multipart_mux_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_factory));
gst_element_class_set_details (element_class, &gst_multipart_mux_details);
}
static void
gst_multipart_mux_class_init (GstMultipartMuxClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gstelement_class->request_new_pad = gst_multipart_mux_request_new_pad;
gstelement_class->change_state = gst_multipart_mux_change_state;
gstelement_class->get_property = gst_multipart_mux_get_property;
gstelement_class->set_property = gst_multipart_mux_set_property;
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BOUNDARY,
g_param_spec_string ("boundary", "Boundary", "Boundary string",
DEFAULT_BOUNDARY, G_PARAM_READWRITE));
}
static const GstEventMask *
gst_multipart_mux_get_sink_event_masks (GstPad * pad)
{
static const GstEventMask gst_multipart_mux_sink_event_masks[] = {
{GST_EVENT_EOS, 0},
{0,}
};
return gst_multipart_mux_sink_event_masks;
}
static void
gst_multipart_mux_init (GstMultipartMux * multipart_mux)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (multipart_mux);
multipart_mux->srcpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"src"), "src");
gst_pad_set_event_function (multipart_mux->srcpad,
gst_multipart_mux_handle_src_event);
gst_element_add_pad (GST_ELEMENT (multipart_mux), multipart_mux->srcpad);
GST_FLAG_SET (GST_ELEMENT (multipart_mux), GST_ELEMENT_EVENT_AWARE);
multipart_mux->sinkpads = NULL;
multipart_mux->boundary = g_strdup (DEFAULT_BOUNDARY);
multipart_mux->negotiated = FALSE;
gst_element_set_loop_function (GST_ELEMENT (multipart_mux),
gst_multipart_mux_loop);
}
static GstPadLinkReturn
gst_multipart_mux_sinkconnect (GstPad * pad, const GstCaps * vscaps)
{
GstMultipartMux *multipart_mux;
GstMultipartPad *mppad;
GstStructure *structure;
multipart_mux = GST_MULTIPART_MUX (gst_pad_get_parent (pad));
mppad = (GstMultipartPad *) gst_pad_get_element_private (pad);
GST_DEBUG ("multipart_mux: sinkconnect triggered on %s",
gst_pad_get_name (pad));
structure = gst_caps_get_structure (vscaps, 0);
mppad->mimetype = gst_structure_get_name (structure);
return GST_PAD_LINK_OK;
}
static void
gst_multipart_mux_pad_link (GstPad * pad, GstPad * peer, gpointer data)
{
//GstMultipartMux *multipart_mux = GST_MULTIPART_MUX (data);
GST_DEBUG ("pad '%s' connected", gst_pad_get_name (pad));
}
static void
gst_multipart_mux_pad_unlink (GstPad * pad, GstPad * peer, gpointer data)
{
//GstMultipartMux *multipart_mux = GST_MULTIPART_MUX (data);
GST_DEBUG ("pad '%s' unlinked", gst_pad_get_name (pad));
}
static GstPad *
gst_multipart_mux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * req_name)
{
GstMultipartMux *multipart_mux;
GstPad *newpad;
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
g_return_val_if_fail (templ != NULL, NULL);
if (templ->direction != GST_PAD_SINK) {
g_warning ("multipart_mux: request pad that is not a SINK pad\n");
return NULL;
}
g_return_val_if_fail (GST_IS_MULTIPART_MUX (element), NULL);
multipart_mux = GST_MULTIPART_MUX (element);
if (templ == gst_element_class_get_pad_template (klass, "sink_%d")) {
gchar *name;
/* create new pad with the name */
name = g_strdup_printf ("sink_%02d", multipart_mux->numpads);
newpad = gst_pad_new_from_template (templ, name);
g_free (name);
/* construct our own wrapper data structure for the pad to
* keep track of its status */
{
GstMultipartPad *multipartpad = g_new0 (GstMultipartPad, 1);
multipartpad->pad = newpad;
multipartpad->eos = FALSE;
/* save a pointer to our data in the pad */
gst_pad_set_element_private (newpad, multipartpad);
/* store our data for the pad */
multipart_mux->sinkpads =
g_slist_prepend (multipart_mux->sinkpads, multipartpad);
multipart_mux->numpads++;
}
} else {
g_warning ("multipart_mux: this is not our template!\n");
return NULL;
}
g_signal_connect (newpad, "linked",
G_CALLBACK (gst_multipart_mux_pad_link), (gpointer) multipart_mux);
g_signal_connect (newpad, "unlinked",
G_CALLBACK (gst_multipart_mux_pad_unlink), (gpointer) multipart_mux);
/* setup some pad functions */
gst_pad_set_link_function (newpad, gst_multipart_mux_sinkconnect);
gst_pad_set_event_mask_function (newpad,
gst_multipart_mux_get_sink_event_masks);
/* dd the pad to the element */
gst_element_add_pad (element, newpad);
return newpad;
}
/* handle events */
static gboolean
gst_multipart_mux_handle_src_event (GstPad * pad, GstEvent * event)
{
GstMultipartMux *multipart_mux;
GstEventType type;
multipart_mux = GST_MULTIPART_MUX (gst_pad_get_parent (pad));
type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
switch (type) {
case GST_EVENT_SEEK:
/* disable seeking for now */
return FALSE;
default:
break;
}
return gst_pad_event_default (pad, event);
}
static GstBuffer *
gst_multipart_mux_next_buffer (GstMultipartPad * pad)
{
GstData *data = NULL;
while (data == NULL) {
GST_LOG ("muxer: pulling %s:%s", GST_DEBUG_PAD_NAME (pad->pad));
data = gst_pad_pull (pad->pad);
/* if it's an event, handle it */
if (GST_IS_EVENT (data)) {
GstEventType type;
GstMultipartMux *multipart_mux;
GstEvent *event = GST_EVENT (data);
multipart_mux = GST_MULTIPART_MUX (gst_pad_get_parent (pad->pad));
type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
switch (type) {
case GST_EVENT_EOS:
return NULL;
default:
gst_pad_event_default (pad->pad, event);
break;
}
data = NULL;
}
}
return GST_BUFFER (data);
}
/*
* Given two pads, compare the buffers queued on it and return 0 if they have
* an equal priority, 1 if the new pad is better, -1 if the old pad is better
*/
static gint
gst_multipart_mux_compare_pads (GstMultipartMux * multipart_mux,
GstMultipartPad * old, GstMultipartPad * new)
{
guint64 oldtime, newtime;
/* if the old pad doesn't contain anything or is even NULL, return
* the new pad as best candidate and vice versa */
if (old == NULL || old->buffer == NULL)
return 1;
if (new == NULL || new->buffer == NULL)
return -1;
/* no timestamp on old buffer, it must go first */
oldtime = GST_BUFFER_TIMESTAMP (old->buffer);
if (oldtime == GST_CLOCK_TIME_NONE)
return -1;
/* no timestamp on new buffer, it must go first */
newtime = GST_BUFFER_TIMESTAMP (new->buffer);
if (newtime == GST_CLOCK_TIME_NONE)
return 1;
/* old buffer has higher timestamp, new one should go first */
if (newtime < oldtime)
return 1;
/* new buffer has higher timestamp, old one should go first */
else if (newtime > oldtime)
return -1;
/* same priority if all of the above failed */
return 0;
}
/* make sure a buffer is queued on all pads, returns a pointer to an multipartpad
* that holds the best buffer or NULL when no pad was usable */
static GstMultipartPad *
gst_multipart_mux_queue_pads (GstMultipartMux * multipart_mux)
{
GstMultipartPad *bestpad = NULL;
GSList *walk;
/* try to make sure we have a buffer from each usable pad first */
walk = multipart_mux->sinkpads;
while (walk) {
GstMultipartPad *pad = (GstMultipartPad *) walk->data;
walk = walk->next;
/* try to get a new buffer for this pad if needed and possible */
if (pad->buffer == NULL && GST_PAD_IS_USABLE (pad->pad)) {
pad->buffer = gst_multipart_mux_next_buffer (pad);
/* no next buffer, try another pad */
if (pad->buffer == NULL)
continue;
}
/* skip unusable pads */
if (!GST_PAD_IS_USABLE (pad->pad))
continue;
/* we should have a buffer now, see if it is the best pad to
* pull on */
if (pad->buffer != NULL) {
if (gst_multipart_mux_compare_pads (multipart_mux, bestpad, pad) > 0) {
bestpad = pad;
}
}
}
return bestpad;
}
/* basic idea:
*
* 1) find a pad to pull on, this is done by pulling on all pads and
* looking at the buffers to decide which one should be muxed first.
* 2) push buffer on best pad, go to 1
*/
static void
gst_multipart_mux_loop (GstElement * element)
{
GstMultipartMux *mux;
GstMultipartPad *pad;
GstBuffer *newbuf, *buf;
gchar *header;
gint headerlen;
gint newlen;
mux = GST_MULTIPART_MUX (element);
/* we don't know which pad to pull on, find one */
pad = gst_multipart_mux_queue_pads (mux);
if (pad == NULL) {
/* no pad to pull on, send EOS */
if (GST_PAD_IS_USABLE (mux->srcpad))
gst_pad_push (mux->srcpad, GST_DATA (gst_event_new (GST_EVENT_EOS)));
gst_element_set_eos (element);
return;
}
/* now see if we have a buffer */
buf = pad->buffer;
if (buf == NULL) {
/* no buffer, get one */
buf = gst_multipart_mux_next_buffer (pad);
if (buf == NULL) {
/* data exhausted on this pad (EOS) */
return;
}
}
/* FIXME, negotiated is not set to FALSE properly after
* reconnect */
if (!mux->negotiated) {
GstCaps *newcaps;
newcaps = gst_caps_new_simple ("multipart/x-mixed-replace",
"boundary", G_TYPE_STRING, mux->boundary, NULL);
if (GST_PAD_LINK_FAILED (gst_pad_try_set_caps (mux->srcpad, newcaps))) {
GST_ELEMENT_ERROR (mux, CORE, NEGOTIATION, (NULL), (NULL));
return;
}
mux->negotiated = TRUE;
}
header = g_strdup_printf ("\n--%s\nContent-type: %s\n\n",
mux->boundary, pad->mimetype);
headerlen = strlen (header);
newlen = headerlen + GST_BUFFER_SIZE (buf);
newbuf = gst_pad_alloc_buffer (mux->srcpad, GST_BUFFER_OFFSET_NONE, newlen);
memcpy (GST_BUFFER_DATA (newbuf), header, headerlen);
memcpy (GST_BUFFER_DATA (newbuf) + headerlen,
GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
GST_BUFFER_TIMESTAMP (newbuf) = GST_BUFFER_TIMESTAMP (buf);
GST_BUFFER_DURATION (newbuf) = GST_BUFFER_DURATION (buf);
GST_BUFFER_OFFSET (newbuf) = mux->offset;
g_free (header);
mux->offset += newlen;
gst_pad_push (mux->srcpad, GST_DATA (newbuf));
gst_buffer_unref (buf);
pad->buffer = NULL;
}
static void
gst_multipart_mux_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstMultipartMux *mux;
mux = GST_MULTIPART_MUX (object);
switch (prop_id) {
case ARG_BOUNDARY:
g_value_set_string (value, mux->boundary);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_multipart_mux_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstMultipartMux *mux;
mux = GST_MULTIPART_MUX (object);
switch (prop_id) {
case ARG_BOUNDARY:
g_free (mux->boundary);
mux->boundary = g_strdup (g_value_get_string (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_multipart_mux_change_state (GstElement * element, GstStateChange transition)
{
GstMultipartMux *multipart_mux;
g_return_val_if_fail (GST_IS_MULTIPART_MUX (element),
GST_STATE_CHANGE_FAILURE);
multipart_mux = GST_MULTIPART_MUX (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
case GST_STATE_CHANGE_READY_TO_PAUSED:
multipart_mux->offset = 0;
multipart_mux->negotiated = FALSE;
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
case GST_STATE_CHANGE_PAUSED_TO_READY:
case GST_STATE_CHANGE_READY_TO_NULL:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
return GST_STATE_CHANGE_SUCCESS;
}
gboolean
gst_multipart_mux_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_multipart_mux_debug, "multipartmux", 0,
"multipart muxer");
return gst_element_register (plugin, "multipartmux", GST_RANK_NONE,
GST_TYPE_MULTIPART_MUX);
}