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gst/playback/: Adding stream selection support plus required properties for applications to use this. Fully fixes #10...

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Original commit message from CVS:
* gst/playback/Makefile.am:
* gst/playback/gstplaybasebin.c: (gst_play_base_bin_class_init),
(group_destroy), (group_commit), (group_is_muted),
(gen_preroll_element), (add_stream), (unknown_type),
(probe_triggered), (preroll_unlinked), (mute_stream),
(silence_stream), (new_decoded_pad), (setup_substreams),
(setup_source), (get_active_source), (mute_group_type),
(muted_group_change_state), (set_active_source),
(gst_play_base_bin_set_property), (gst_play_base_bin_get_property),
(play_base_eos), (gst_play_base_bin_change_state):
* gst/playback/gstplaybasebin.h:
* gst/playback/gstplaybin.c: (add_sink), (setup_sinks):
* gst/playback/gststreaminfo.c: (gst_stream_info_class_init),
(gst_stream_info_dispose), (stream_info_mute_pad),
(stream_info_change_state), (gst_stream_info_set_mute):
* gst/playback/gststreamselector.c: (gst_stream_selector_get_type),
(gst_stream_selector_base_init), (gst_stream_selector_class_init),
(gst_stream_selector_init), (gst_stream_selector_dispose),
(gst_stream_selector_get_linked_pad),
(gst_stream_selector_get_caps), (gst_stream_selector_link),
(gst_stream_selector_get_linked_pads),
(gst_stream_selector_request_new_pad), (gst_stream_selector_chain):
* gst/playback/gststreamselector.h:
Adding stream selection support plus required properties for
applications to use this. Fully fixes .
This commit is contained in:
Ronald S. Bultje 2005-01-08 18:31:22 +00:00
parent 94cb364fa2
commit 14656be9b5
8 changed files with 865 additions and 246 deletions

28
ChangeLog
View file

@ -1,3 +1,31 @@
2005-01-08 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* gst/playback/Makefile.am:
* gst/playback/gstplaybasebin.c: (gst_play_base_bin_class_init),
(group_destroy), (group_commit), (group_is_muted),
(gen_preroll_element), (add_stream), (unknown_type),
(probe_triggered), (preroll_unlinked), (mute_stream),
(silence_stream), (new_decoded_pad), (setup_substreams),
(setup_source), (get_active_source), (mute_group_type),
(muted_group_change_state), (set_active_source),
(gst_play_base_bin_set_property), (gst_play_base_bin_get_property),
(play_base_eos), (gst_play_base_bin_change_state):
* gst/playback/gstplaybasebin.h:
* gst/playback/gstplaybin.c: (add_sink), (setup_sinks):
* gst/playback/gststreaminfo.c: (gst_stream_info_class_init),
(gst_stream_info_dispose), (stream_info_mute_pad),
(stream_info_change_state), (gst_stream_info_set_mute):
* gst/playback/gststreamselector.c: (gst_stream_selector_get_type),
(gst_stream_selector_base_init), (gst_stream_selector_class_init),
(gst_stream_selector_init), (gst_stream_selector_dispose),
(gst_stream_selector_get_linked_pad),
(gst_stream_selector_get_caps), (gst_stream_selector_link),
(gst_stream_selector_get_linked_pads),
(gst_stream_selector_request_new_pad), (gst_stream_selector_chain):
* gst/playback/gststreamselector.h:
Adding stream selection support plus required properties for
applications to use this. Fully fixes #100931.
2005-01-08 Benjamin Otte <otte@gnome.org>
* gst/games/gstpuzzle.c: (nav_event_handler):

9
gst/playback/Makefile.am
View file

@ -12,7 +12,9 @@ plugin_LTLIBRARIES = libgstplaybin.la libgstdecodebin.la
libgstplaybin_la_SOURCES = \
gstplaybin.c \
gstplaybasebin.c \
gststreaminfo.c
gststreaminfo.c \
gststreamselector.c
nodist_libgstplaybin_la_SOURCES = $(built_sources)
libgstplaybin_la_CFLAGS = $(GST_CFLAGS)
libgstplaybin_la_LIBADD =
@ -24,7 +26,10 @@ libgstdecodebin_la_CFLAGS = $(GST_CFLAGS)
libgstdecodebin_la_LIBADD =
libgstdecodebin_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
noinst_HEADERS = gstplaybasebin.h gststreaminfo.h
noinst_HEADERS = \
gstplaybasebin.h \
gststreaminfo.h \
gststreamselector.h
noinst_PROGRAMS = test decodetest test2 test3 test4

463
gst/playback/gstplaybasebin.c
View file

@ -23,6 +23,7 @@
#include <string.h>
#include "gstplaybasebin.h"
#include "gststreamselector.h"
#include "gstplay-marshal.h"
GST_DEBUG_CATEGORY_STATIC (gst_play_base_bin_debug);
@ -39,7 +40,10 @@ enum
ARG_NSTREAMS,
ARG_QUEUE_SIZE,
ARG_STREAMINFO,
ARG_SOURCE
ARG_SOURCE,
ARG_VIDEO,
ARG_AUDIO,
ARG_TEXT
};
/* signals */
@ -76,6 +80,12 @@ static void gst_play_base_bin_error (GstElement * element,
static void gst_play_base_bin_found_tag (GstElement * element,
GstElement * source, const GstTagList * taglist, gpointer data);
static void set_active_source (GstPlayBaseBin * play_base_bin,
GstStreamType type, gint source_num);
static gboolean probe_triggered (GstProbe * probe, GstData ** data,
gpointer user_data);
static void setup_substreams (GstPlayBaseBin * play_base_bin);
static GstElementClass *element_class;
static GstElementClass *parent_class;
static guint gst_play_base_bin_signals[LAST_SIGNAL] = { 0 };
@ -140,6 +150,19 @@ gst_play_base_bin_class_init (GstPlayBaseBinClass * klass)
g_param_spec_object ("source", "Source", "Source element",
GST_TYPE_ELEMENT, G_PARAM_READABLE));
g_object_class_install_property (gobject_klass, ARG_VIDEO,
g_param_spec_int ("current-video", "Current video",
"Currently playing video stream (-1 = none)",
-1, G_MAXINT, -1, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, ARG_AUDIO,
g_param_spec_int ("current-audio", "Current audio",
"Currently playing audio stream (-1 = none)",
-1, G_MAXINT, -1, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, ARG_TEXT,
g_param_spec_int ("current-text", "Current text",
"Currently playing text stream (-1 = none)",
-1, G_MAXINT, -1, G_PARAM_READWRITE));
GST_DEBUG_CATEGORY_INIT (gst_play_base_bin_debug, "playbasebin", 0,
"playbasebin");
@ -263,17 +286,21 @@ static void
group_destroy (GstPlayBaseGroup * group)
{
GstPlayBaseBin *play_base_bin = group->bin;
GList *prerolls, *infos;
GList *infos;
gint n;
GST_LOG ("removing group %p", group);
/* remove the preroll queues */
for (prerolls = group->preroll_elems; prerolls;
prerolls = g_list_next (prerolls)) {
GstElement *element = GST_ELEMENT (prerolls->data);
for (n = 0; n < NUM_TYPES; n++) {
GstElement *element = group->type[n].preroll;
GstPad *pad;
guint sig_id;
GstElement *fakesrc;
const GList *item;
if (!element)
continue;
/* have to unlink the unlink handler first because else we
* are going to link an element in the finalize handler */
@ -288,10 +315,20 @@ group_destroy (GstPlayBaseGroup * group)
}
/* remove any fakesrc elements for this preroll element */
fakesrc = (GstElement *) g_object_get_data (G_OBJECT (element), "fakesrc");
if (fakesrc != NULL) {
GST_LOG ("removing fakesrc");
gst_bin_remove (GST_BIN (play_base_bin->thread), fakesrc);
for (item = gst_element_get_pad_list (group->type[n].selector);
item != NULL; item = item->next) {
GstPad *pad = item->data;
if (GST_PAD_DIRECTION (pad) != GST_PAD_SINK)
continue;
fakesrc = (GstElement *) g_object_get_data (G_OBJECT (pad), "fakesrc");
if (fakesrc != NULL) {
GST_LOG ("removing fakesrc from %s:%s",
gst_pad_get_name (pad),
GST_ELEMENT_NAME (gst_pad_get_parent (pad)));
gst_bin_remove (GST_BIN (play_base_bin->thread), fakesrc);
}
}
/* if the group is currently being played, we have to remove the element
@ -299,12 +336,15 @@ group_destroy (GstPlayBaseGroup * group)
if (get_active_group (play_base_bin) == group) {
GST_LOG ("removing preroll element %s", gst_element_get_name (element));
gst_bin_remove (GST_BIN (play_base_bin->thread), element);
gst_bin_remove (GST_BIN (play_base_bin->thread), group->type[n].selector);
} else {
/* else we can just unref it */
gst_object_unref (GST_OBJECT (element));
gst_object_unref (GST_OBJECT (group->type[n].selector));
}
group->type[n].preroll = NULL;
}
g_list_free (group->preroll_elems);
/* free the streaminfo too */
for (infos = group->streaminfo; infos; infos = g_list_next (infos)) {
@ -323,7 +363,6 @@ static void
group_commit (GstPlayBaseBin * play_base_bin, gboolean fatal)
{
GstPlayBaseGroup *group = play_base_bin->building_group;
GList *prerolls;
/* if an element signalled a no-more-pads after we stopped due
* to preroll, the group is NULL. This is not an error */
@ -334,6 +373,8 @@ group_commit (GstPlayBaseBin * play_base_bin, gboolean fatal)
GST_DEBUG ("Group loading failed, bailing out");
}
} else {
gint n;
GST_DEBUG ("group %p done", group);
play_base_bin->queued_groups = g_list_append (play_base_bin->queued_groups,
@ -343,11 +384,13 @@ group_commit (GstPlayBaseBin * play_base_bin, gboolean fatal)
/* remove signals. We don't want anymore signals from the preroll
* elements at this stage. */
for (prerolls = group->preroll_elems; prerolls;
prerolls = g_list_next (prerolls)) {
GstElement *element = GST_ELEMENT (prerolls->data);
for (n = 0; n < NUM_TYPES; n++) {
GstElement *element = group->type[n].preroll;
guint sig_id;
if (!element)
continue;
sig_id =
GPOINTER_TO_INT (g_object_get_data (G_OBJECT (element), "signal_id"));
@ -367,15 +410,13 @@ group_commit (GstPlayBaseBin * play_base_bin, gboolean fatal)
static gboolean
group_is_muted (GstPlayBaseGroup * group)
{
GList *infos;
gint n;
for (infos = group->streaminfo; infos; infos = g_list_next (infos)) {
GstStreamInfo *info = GST_STREAM_INFO (infos->data);
/* if we find a non muded group we can return FALSE */
if (!info->mute)
for (n = 0; n < NUM_TYPES; n++) {
if (group->type[n].preroll && !group->type[n].done)
return FALSE;
}
return TRUE;
}
@ -394,26 +435,62 @@ queue_overrun (GstElement * element, GstPlayBaseBin * play_base_bin)
* of the queues to fill. The assumption is that all the dynamic
* streams will be detected by that time.
*/
static GstElement *
gen_preroll_element (GstPlayBaseBin * play_base_bin, GstPad * pad)
static void
gen_preroll_element (GstPlayBaseBin * play_base_bin,
GstPlayBaseGroup * group, GstStreamType type, GstPad * pad,
GstStreamInfo * info)
{
GstElement *element;
GstElement *selector, *preroll;
gchar *name;
const gchar *prename;
guint sig;
GstPad *preroll_pad;
GstProbe *probe;
name = g_strdup_printf ("preroll_%s", gst_pad_get_name (pad));
element = gst_element_factory_make ("queue", name);
g_object_set (G_OBJECT (element),
if (type == GST_STREAM_TYPE_VIDEO)
prename = "video";
else if (type == GST_STREAM_TYPE_TEXT)
prename = "text";
else if (type == GST_STREAM_TYPE_AUDIO)
prename = "audio";
else
g_return_if_reached ();
/* create stream selector */
name = g_strdup_printf ("selector_%s_%s", prename, gst_pad_get_name (pad));
selector = g_object_new (GST_TYPE_STREAM_SELECTOR, NULL);
gst_object_set_name (GST_OBJECT (selector), name);
g_free (name);
/* create preroll queue */
name = g_strdup_printf ("preroll_%s_%s", prename, gst_pad_get_name (pad));
preroll = gst_element_factory_make ("queue", name);
g_object_set (G_OBJECT (preroll),
"max-size-buffers", 0, "max-size-bytes", 10 * 1024 * 1024,
"max-size-time", play_base_bin->queue_size, NULL);
sig = g_signal_connect (G_OBJECT (element), "overrun",
sig = g_signal_connect (G_OBJECT (preroll), "overrun",
G_CALLBACK (queue_overrun), play_base_bin);
/* keep a ref to the signal id so that we can disconnect the signal callback
* when we are done with the preroll */
g_object_set_data (G_OBJECT (element), "signal_id", GINT_TO_POINTER (sig));
g_object_set_data (G_OBJECT (preroll), "signal_id", GINT_TO_POINTER (sig));
g_free (name);
return element;
/* listen for EOS */
preroll_pad = gst_element_get_pad (preroll, "src");
probe = gst_probe_new (FALSE, probe_triggered, info);
/* have to REALIZE the pad as we cannot attach a padprobe to a ghostpad */
gst_pad_add_probe (preroll_pad, probe);
/* add to group list */
gst_element_link (selector, preroll);
group->type[type - 1].selector = selector;
group->type[type - 1].preroll = preroll;
gst_bin_add (GST_BIN (play_base_bin->thread), selector);
gst_element_set_state (selector, GST_STATE_PLAYING);
gst_bin_add (GST_BIN (play_base_bin->thread), preroll);
gst_element_set_state (preroll, GST_STATE_PAUSED);
play_base_bin->threaded = TRUE;
}
static void
@ -456,19 +533,8 @@ add_stream (GstPlayBaseGroup * group, GstStreamInfo * info)
g_object_set_data (G_OBJECT (info), "group", group);
group->streaminfo = g_list_append (group->streaminfo, info);
switch (info->type) {
case GST_STREAM_TYPE_AUDIO:
group->naudiopads++;
break;
case GST_STREAM_TYPE_VIDEO:
group->nvideopads++;
break;
case GST_STREAM_TYPE_TEXT:
group->ntextpads++;
break;
default:
group->nunknownpads++;
break;
if (info->type > 0 && info->type <= NUM_TYPES) {
group->type[info->type - 1].npads++;
}
}
@ -484,7 +550,7 @@ unknown_type (GstElement * element, GstPad * pad, GstCaps * caps,
GstPlayBaseGroup *group = get_building_group (play_base_bin);
capsstr = gst_caps_to_string (caps);
g_warning ("don't know how to handle %s", capsstr);
g_message /*warning */ ("don't know how to handle %s", capsstr);
/* add the stream to the list */
info = gst_stream_info_new (GST_OBJECT (pad), GST_STREAM_TYPE_UNKNOWN,
@ -540,15 +606,21 @@ probe_triggered (GstProbe * probe, GstData ** data, gpointer user_data)
GstEvent *event = GST_EVENT (*data);
if (GST_EVENT_TYPE (event) == GST_EVENT_EOS) {
gint num_groups = 0;
gboolean have_left;
GST_DEBUG ("probe got EOS in group %p", group);
/* mute this stream */
g_object_set (G_OBJECT (info), "mute", TRUE, NULL);
//g_object_set (G_OBJECT (info), "mute", TRUE, NULL);
if (info->type > 0 && info->type <= NUM_TYPES)
group->type[info->type - 1].done = TRUE;
/* see if we have some more groups left to play */
have_left = (g_list_length (play_base_bin->queued_groups) > 1);
num_groups = g_list_length (play_base_bin->queued_groups);
if (play_base_bin->building_group)
num_groups++;
have_left = (num_groups > 1);
/* see if the complete group is muted */
if (!group_is_muted (group)) {
@ -561,14 +633,15 @@ probe_triggered (GstProbe * probe, GstData ** data, gpointer user_data)
}
if (have_left) {
GST_DEBUG ("changing state for group change");
gst_element_set_state (play_base_bin->thread, GST_STATE_PAUSED);
/* ok, get rid of the current group then */
group_destroy (group);
/* removing the current group brings the next group
* active */
play_base_bin->queued_groups =
g_list_delete_link (play_base_bin->queued_groups,
play_base_bin->queued_groups);
g_list_remove (play_base_bin->queued_groups, group);
setup_substreams (play_base_bin);
GST_DEBUG ("switching to next group %p",
play_base_bin->queued_groups->data);
/* and signal the new group */
@ -578,9 +651,12 @@ probe_triggered (GstProbe * probe, GstData ** data, gpointer user_data)
GST_DEBUG ("Syncing state from %d", GST_STATE (play_base_bin->thread));
gst_element_set_state (play_base_bin->thread, GST_STATE_PLAYING);
GST_DEBUG ("done");
/* get rid of the EOS event */
return FALSE;
} else {
GST_LOG ("Last group done, EOS");
}
} else if (GST_EVENT_TYPE (event) == GST_EVENT_TAG) {
GstTagList *taglist;
@ -616,7 +692,7 @@ static void
preroll_unlinked (GstPad * pad, GstPad * peerpad,
GstPlayBaseBin * play_base_bin)
{
GstElement *fakesrc, *queue;
GstElement *fakesrc;
guint sig_id;
/* make a fakesrc that will just emit one EOS */
@ -629,8 +705,7 @@ preroll_unlinked (GstPad * pad, GstPad * peerpad,
gst_bin_add (GST_BIN (play_base_bin->thread), fakesrc);
/* keep track of these patch elements */
queue = GST_ELEMENT (gst_object_get_parent (GST_OBJECT (pad)));
g_object_set_data (G_OBJECT (queue), "fakesrc", fakesrc);
g_object_set_data (G_OBJECT (pad), "fakesrc", fakesrc);
/* now unlink the unlinked signal so that it is not called again when
* we destroy the queue */
@ -641,6 +716,30 @@ preroll_unlinked (GstPad * pad, GstPad * peerpad,
}
}
/* Mute stream on first data - for header-is-in-stream-stuff
* (vorbis, ogmtext). */
static gboolean
mute_stream (GstProbe * probe, GstData ** d, gpointer data)
{
GstStreamInfo *info = GST_STREAM_INFO (data);
if (GST_IS_BUFFER (*d)) {
g_object_set (G_OBJECT (info), "mute", TRUE, NULL);
gst_pad_remove_probe ((GstPad *) GST_PAD_REALIZE (info->object), probe);
gst_probe_destroy (probe);
}
/* no data */
return FALSE;
}
/* Eat data. */
static gboolean
silence_stream (GstProbe * probe, GstData ** d, gpointer data)
{
/* no data */
return FALSE;
}
/* signal fired when decodebin has found a new raw pad. We create
* a preroll element if needed and the appropriate streaminfo.
@ -652,13 +751,12 @@ new_decoded_pad (GstElement * element, GstPad * pad, gboolean last,
GstStructure *structure;
const gchar *mimetype;
GstCaps *caps;
GstElement *new_element = NULL;
GstStreamInfo *info;
GstStreamType type;
GstPad *srcpad;
gboolean need_preroll;
GstPad *sinkpad;
GstPlayBaseGroup *group;
GstProbe *probe;
guint sig;
GST_DEBUG ("play base: new decoded pad %d", last);
@ -679,69 +777,46 @@ new_decoded_pad (GstElement * element, GstPad * pad, gboolean last,
group->nstreams++;
need_preroll = FALSE;
if (g_str_has_prefix (mimetype, "audio/")) {
type = GST_STREAM_TYPE_AUDIO;
/* first audio pad gets a preroll element */
if (group->naudiopads == 0) {
need_preroll = TRUE;
}
} else if (g_str_has_prefix (mimetype, "video/")) {
type = GST_STREAM_TYPE_VIDEO;
/* first video pad gets a preroll element */
if (group->nvideopads == 0) {
need_preroll = TRUE;
}
} else if (g_str_has_prefix (mimetype, "text/")) {
type = GST_STREAM_TYPE_TEXT;
/* first text pad gets a preroll element */
if (group->ntextpads == 0) {
need_preroll = TRUE;
}
} else {
type = GST_STREAM_TYPE_UNKNOWN;
}
if (last || !need_preroll) {
GST_DEBUG ("play base: pad does not need preroll");
srcpad = pad;
} else {
guint sig;
GstPad *sinkpad;
GST_DEBUG ("play base: pad needs preroll");
new_element = gen_preroll_element (play_base_bin, pad);
srcpad = gst_element_get_pad (new_element, "src");
gst_bin_add (GST_BIN (play_base_bin->thread), new_element);
play_base_bin->threaded = TRUE;
group->preroll_elems = g_list_prepend (group->preroll_elems, new_element);
gst_element_set_state (new_element, GST_STATE_READY);
sinkpad = gst_element_get_pad (new_element, "sink");
gst_pad_link (pad, sinkpad);
/* make sure we catch unlink signals */
sig = g_signal_connect (G_OBJECT (sinkpad), "unlinked",
G_CALLBACK (preroll_unlinked), play_base_bin);
/* keep a ref to the signal id so that we can disconnect the signal callback */
g_object_set_data (G_OBJECT (sinkpad), "unlinked_id",
GINT_TO_POINTER (sig));
gst_element_set_state (new_element, GST_STATE_PAUSED);
info = gst_stream_info_new (GST_OBJECT (pad), type, NULL, caps);
if (type > 0 && type <= NUM_TYPES) {
/* first pad of each type gets a selector + preroll queue */
if (group->type[type - 1].npads == 0) {
GST_DEBUG ("play base: pad needs new preroll");
gen_preroll_element (play_base_bin, group, type, pad, info);
}
}
/* add to stream selector */
sinkpad = gst_element_get_pad (group->type[type - 1].selector, "sink%d");
/* make sure we catch unlink signals */
sig = g_signal_connect (G_OBJECT (sinkpad), "unlinked",
G_CALLBACK (preroll_unlinked), play_base_bin);
/* keep a ref to the signal id so that we can disconnect the signal callback */
g_object_set_data (G_OBJECT (sinkpad), "unlinked_id", GINT_TO_POINTER (sig));
gst_pad_link (pad, sinkpad);
/* add the stream to the list */
info = gst_stream_info_new (GST_OBJECT (srcpad), type, NULL, caps);
gst_caps_free (caps);
info->origin = GST_OBJECT (pad);
add_stream (group, info);
/* install a probe so that we know when this group has ended */
probe = gst_probe_new (FALSE, probe_triggered, info);
/* have to REALIZE the pad as we cannot attach a padprobe to a ghostpad */
gst_pad_add_probe (GST_PAD_REALIZE (srcpad), probe);
/* select 1st for now - we'll select a preferred one after preroll */
if (type == GST_STREAM_TYPE_UNKNOWN || group->type[type - 1].npads > 0) {
probe = gst_probe_new (FALSE, silence_stream, info);
gst_pad_add_probe (GST_PAD_REALIZE (pad), probe);
g_object_set_data (G_OBJECT (pad), "eat_probe", probe);
}
add_stream (group, info);
/* signal the no more pads after adding the stream */
if (last)
@ -942,6 +1017,48 @@ gen_source_element (GstPlayBaseBin * play_base_bin, GList ** subbins)
return bin;
}
/* Setup the substreams (to be called right after group_commit ()) */
static void
setup_substreams (GstPlayBaseBin * play_base_bin)
{
GstPlayBaseGroup *group = get_active_group (play_base_bin);
GstProbe *probe;
gint n;
const GList *item;
/* Remove the eat probes */
for (item = group->streaminfo; item; item = item->next) {
GstStreamInfo *info = item->data;
probe = g_object_get_data (G_OBJECT (info->object), "eat_probe");
if (probe) {
gst_pad_remove_probe (GST_PAD_REALIZE (info->object), probe);
gst_probe_destroy (probe);
}
/* now remove unknown pads */
if (info->type == GST_STREAM_TYPE_UNKNOWN) {
GstProbe *probe;
probe = gst_probe_new (FALSE, mute_stream, info);
gst_pad_add_probe (GST_PAD_REALIZE (info->object), probe);
}
}
/* now check if the requested current streams exist */
for (n = 0; n < NUM_TYPES; n++) {
if (play_base_bin->current[n] >= group->type[n].npads) {
play_base_bin->current[n] = group->type[n].npads > 0 ? 0 : -1;
}
}
/* now acticate the right sources. Don't forget that during preroll,
* we set the first source to forwarding and ignored the rest. */
for (n = 0; n < NUM_TYPES; n++) {
set_active_source (play_base_bin, n + 1, play_base_bin->current[n]);
}
}
/* construct and run the source and decoder elements until we found
* all the streams or until a preroll queue has been filled.
*/
@ -1133,14 +1250,125 @@ setup_source (GstPlayBaseBin * play_base_bin, GError ** error)
play_base_bin->need_rebuild = FALSE;
}
/* make subs iterate from now on */
for (item = play_base_bin->subtitles; item; item = item->next) {
gst_bin_add (GST_BIN (play_base_bin->thread), item->data);
if (get_active_group (play_base_bin) != NULL) {
/* make subs iterate from now on */
for (item = play_base_bin->subtitles; item; item = item->next) {
gst_bin_add (GST_BIN (play_base_bin->thread), item->data);
}
setup_substreams (play_base_bin);
}
return TRUE;
}
/*
* Multi-stream management. -1 = none.
*/
static gint
get_active_source (GstPlayBaseBin * play_base_bin, GstStreamType type)
{
GstPlayBaseGroup *group;
GList *s;
gint num = 0;
group = get_active_group (play_base_bin);
if (!group)
return -1;
for (s = group->streaminfo; s; s = s->next) {
GstStreamInfo *info = s->data;
if (info->type == type) {
if (!info->mute) {
return num;
} else {
num++;
}
}
}
return -1;
}
/* Kill pad reactivation on state change. */
static void muted_group_change_state (GstElement * element,
gint old_state, gint new_state, gpointer data);
static void
mute_group_type (GstPlayBaseGroup * group, GstStreamType type, gboolean mute)
{
gboolean active = !mute;
gst_pad_set_active (gst_element_get_pad (group->type[type - 1].preroll,
"src"), active);
gst_pad_set_active (gst_element_get_pad (group->type[type - 1].preroll,
"sink"), active);
gst_pad_set_active (gst_element_get_pad (group->type[type - 1].selector,
"src"), active);
if (mute) {
g_signal_connect (group->type[type - 1].preroll, "state-change",
G_CALLBACK (muted_group_change_state), group);
} else {
g_signal_handlers_disconnect_by_func (group->type[type - 1].preroll,
G_CALLBACK (muted_group_change_state), group);
}
}
static void
muted_group_change_state (GstElement * element,
gint old_state, gint new_state, gpointer data)
{
GstPlayBaseGroup *group = data;
if (new_state == GST_STATE_PLAYING) {
gint n;
for (n = 0; n < NUM_TYPES; n++) {
if (group->type[n].selector == element) {
mute_group_type (group, n + 1, TRUE);
}
}
}
}
static void
set_active_source (GstPlayBaseBin * play_base_bin,
GstStreamType type, gint source_num)
{
GstPlayBaseGroup *group;
GList *s;
gint num = 0;
gboolean have_active = FALSE;
GST_LOG ("Changing active source of type %d to %d", type, source_num);
play_base_bin->current[type - 1] = source_num;
group = get_active_group (play_base_bin);
if (!group || !group->type[type - 1].preroll)
return;
for (s = group->streaminfo; s; s = s->next) {
GstStreamInfo *info = s->data;
if (info->type == type) {
if (num == source_num) {
g_object_set (s->data, "mute", FALSE, NULL);
have_active = TRUE;
} else {
GstProbe *probe;
probe = gst_probe_new (FALSE, mute_stream, info);
gst_pad_add_probe (GST_PAD_REALIZE (info->object), probe);
}
num++;
}
}
mute_group_type (group, type, !have_active);
}
static void
gst_play_base_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
@ -1175,6 +1403,18 @@ gst_play_base_bin_set_property (GObject * object, guint prop_id,
case ARG_QUEUE_SIZE:
play_base_bin->queue_size = g_value_get_uint64 (value);
break;
case ARG_VIDEO:
set_active_source (play_base_bin,
GST_STREAM_TYPE_VIDEO, g_value_get_int (value));
break;
case ARG_AUDIO:
set_active_source (play_base_bin,
GST_STREAM_TYPE_AUDIO, g_value_get_int (value));
break;
case ARG_TEXT:
set_active_source (play_base_bin,
GST_STREAM_TYPE_TEXT, g_value_get_int (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -1222,6 +1462,18 @@ gst_play_base_bin_get_property (GObject * object, guint prop_id, GValue * value,
} else
g_value_set_object (value, play_base_bin->source);
break;
case ARG_VIDEO:
g_value_set_int (value, get_active_source (play_base_bin,
GST_STREAM_TYPE_VIDEO));
break;
case ARG_AUDIO:
g_value_set_int (value, get_active_source (play_base_bin,
GST_STREAM_TYPE_AUDIO));
break;
case ARG_TEXT:
g_value_set_int (value, get_active_source (play_base_bin,
GST_STREAM_TYPE_TEXT));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -1233,6 +1485,8 @@ play_base_eos (GstBin * bin, GstPlayBaseBin * play_base_bin)
{
no_more_pads (GST_ELEMENT (bin), play_base_bin);
GST_LOG ("forwarding EOS");
gst_element_set_eos (GST_ELEMENT (play_base_bin));
}
@ -1349,6 +1603,7 @@ gst_play_base_bin_change_state (GstElement * element)
GST_DEBUG ("emit signal");
g_signal_emit (play_base_bin,
gst_play_base_bin_signals[SETUP_OUTPUT_PADS_SIGNAL], 0);
GST_DEBUG ("done");
} else {
/* clean up leftover groups */
remove_groups (play_base_bin);

15
gst/playback/gstplaybasebin.h
View file

@ -52,12 +52,13 @@ typedef struct
gint nstreams;
GList *streaminfo;
gint naudiopads;
gint nvideopads;
gint ntextpads;
gint nunknownpads;
GList *preroll_elems;
struct {
gint npads;
GstElement *preroll;
GstElement *selector;
gboolean done;
#define NUM_TYPES 3
} type[NUM_TYPES]; /* AUDIO, VIDEO, TEXT */
} GstPlayBaseGroup;
struct _GstPlayBaseBin {
@ -67,6 +68,8 @@ struct _GstPlayBaseBin {
gboolean threaded;
guint64 queue_size;
gint current[NUM_TYPES];
/* internal thread */
GstElement *thread;
gchar *uri;

210
gst/playback/gstplaybin.c
View file

@ -671,74 +671,72 @@ remove_sinks (GstPlayBin * play_bin)
* this should eventually be handled with a tuner interface so that
* one can switch the streams.
*/
static gboolean
add_sink (GstPlayBin * play_bin, GstElement * sink, GstPad * srcpad)
{
GstPad *sinkpad;
gboolean res;
/* we found a sink for this stream, now try to install it */
gst_bin_add (GST_BIN (play_bin), sink);
GST_DEBUG ("Adding sink with state %d (parent: %d, peer: %d)\n",
GST_STATE (sink), GST_STATE (play_bin),
GST_STATE (gst_pad_get_parent (srcpad)));
sinkpad = gst_element_get_pad (sink, "sink");
/* try to link the pad of the sink to the stream */
res = gst_pad_link (srcpad, sinkpad);
if (!res) {
gchar *capsstr;
/* could not link this stream */
capsstr = gst_caps_to_string (gst_pad_get_caps (srcpad));
g_warning ("could not link %s", capsstr);
g_free (capsstr);
GST_LOG ("removing sink %p", sink);
gst_bin_remove (GST_BIN (play_bin), sink);
} else {
/* we got the sink succesfully linked, now keep the sink
* in out internal list */
play_bin->sinks = g_list_prepend (play_bin->sinks, sink);
}
return res;
}
static void
setup_sinks (GstPlayBaseBin * play_base_bin)
{
GstPlayBin *play_bin = GST_PLAY_BIN (play_base_bin);
GList *streaminfo;
GList *s;
gint num_audio = 0;
gint num_video = 0;
gint num_text = 0;
GstPlayBaseGroup *group;
GList *streaminfo = NULL, *s;
gboolean need_vis = FALSE;
gboolean need_text = FALSE;
GstPad *textsrcpad = NULL, *textsinkpad = NULL;
GstElement *sink;
/* FIXME: do this nicer, like taking a look at the installed
* bins and figuring out if we can simply reconnect them, remove
* or add them. */
if (GST_STATE (play_base_bin) == GST_STATE_PLAYING) {
/* get rid of existing sinks */
if (play_bin->sinks) {
remove_sinks (play_bin);
}
GST_DEBUG ("setupsinks");
/* get info about the stream */
g_object_get (G_OBJECT (play_bin), "stream-info", &streaminfo, NULL);
/* first examine the streams we have */
for (s = streaminfo; s; s = g_list_next (s)) {
GObject *obj = G_OBJECT (s->data);
gint type;
GstPad *srcpad;
g_object_get (obj, "type", &type, NULL);
/* we don't care about streams with their own sink */
if (type == 4)
continue;
/* else we need to get the pad */
g_object_get (obj, "object", &srcpad, NULL);
/* hmm.. pad is allready linked */
if (gst_pad_is_linked (srcpad))
continue;
if (type == 1) {
num_audio++;
} else if (type == 2) {
num_video++;
} else if (type == 3) {
num_text++;
}
}
/* no video, use vis */
if (num_video == 0 && num_audio > 0 && play_bin->visualisation) {
need_vis = TRUE;
} else if (num_video > 0 && num_text > 0) {
/* find out what to do */
group = play_base_bin->queued_groups->data;
if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads > 0 &&
group->type[GST_STREAM_TYPE_TEXT - 1].npads > 0) {
need_text = TRUE;
} else if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads == 0 &&
group->type[GST_STREAM_TYPE_AUDIO - 1].npads > 0 &&
play_bin->visualisation != NULL) {
need_vis = TRUE;
}
num_audio = 0;
num_video = 0;
num_text = 0;
/* now actually connect everything */
g_object_get (G_OBJECT (play_base_bin), "stream-info", &streaminfo, NULL);
for (s = streaminfo; s; s = g_list_next (s)) {
GObject *obj = G_OBJECT (s->data);
gint type;
GstPad *srcpad, *sinkpad;
GstElement *sink = NULL;
gboolean res;
gboolean mute = FALSE;
GstObject *object;
g_object_get (obj, "type", &type, NULL);
@ -747,91 +745,41 @@ setup_sinks (GstPlayBaseBin * play_base_bin)
/* use the sink elements as seek entry point */
if (type == 4) {
play_bin->seekables = g_list_prepend (play_bin->seekables, object);
continue;
}
srcpad = GST_PAD (object);
/* pas is allready linked, go to the next pad */
if (gst_pad_is_linked (srcpad))
continue;
if (type == 1) {
if (num_audio > 0) {
g_warning ("two audio streams found, playing first one");
mute = TRUE;
} else {
if (need_vis) {
sink = gen_vis_element (play_bin);
} else {
sink = gen_audio_element (play_bin);
}
num_audio++;
}
} else if (type == 2) {
if (num_video > 0) {
g_warning ("two video streams found, playing first one");
mute = TRUE;
} else {
if (need_text) {
sink = gen_text_element (play_bin);
textsinkpad = gst_element_get_pad (sink, "text_sink");
} else {
sink = gen_video_element (play_bin);
}
num_video++;
}
} else if (type == 3) {
if (num_text > 0) {
g_warning ("two subtitle streams found, playing first one");
mute = TRUE;
} else {
textsrcpad = srcpad;
num_text++;
}
} else if (type == 4) {
/* we can ignore these streams here */
} else {
g_warning ("unknown stream found");
mute = TRUE;
}
/* we found a sink for this stream, now try to install it */
if (sink != NULL) {
gst_bin_add (GST_BIN (play_bin), sink);
GST_DEBUG ("Adding sink with state %d (parent: %d, peer: %d)\n",
GST_STATE (sink), GST_STATE (play_bin),
GST_STATE (gst_pad_get_parent (srcpad)));
sinkpad = gst_element_get_pad (sink, "sink");
/* try to link the pad of the sink to the stream */
res = gst_pad_link (srcpad, sinkpad);
if (!res) {
gchar *capsstr;
/* could not link this stream */
capsstr = gst_caps_to_string (gst_pad_get_caps (srcpad));
g_warning ("could not link %s", capsstr);
g_free (capsstr);
GST_LOG ("removing sink %p", sink);
gst_bin_remove (GST_BIN (play_bin), sink);
mute = TRUE;
} else {
/* we got the sink succesfully linked, now keep the sink
* in out internal list */
play_bin->sinks = g_list_prepend (play_bin->sinks, sink);
}
}
if (mute) {
/* no sink found/needed for this stream. We mute the stream
* so that it does not take any resources */
g_object_set (G_OBJECT (obj), "mute", TRUE, NULL);
}
}
/* if subtitles, link */
if (textsrcpad && num_video > 0) {
gst_pad_link (textsrcpad, textsinkpad);
/* link audio */
if (group->type[GST_STREAM_TYPE_AUDIO - 1].npads > 0) {
if (need_vis) {
sink = gen_vis_element (play_bin);
} else {
sink = gen_audio_element (play_bin);
}
//gst_element_link (group->type[GST_STREAM_TYPE_AUDIO - 1].preroll, sink);
add_sink (play_bin, sink,
gst_element_get_pad (group->type[GST_STREAM_TYPE_AUDIO - 1].preroll,
"src"));
}
/* link video */
if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads > 0) {
if (need_text) {
sink = gen_text_element (play_bin);
textsinkpad = gst_element_get_pad (sink, "text_sink");
textsrcpad =
gst_element_get_pad (group->type[GST_STREAM_TYPE_TEXT - 1].preroll,
"src");
if (textsinkpad && textsrcpad) {
gst_pad_link (textsrcpad, textsinkpad);
}
} else {
sink = gen_video_element (play_bin);
}
//gst_element_link (group->type[GST_STREAM_TYPE_VIDEO - 1].preroll, sink);
add_sink (play_bin, sink,
gst_element_get_pad (group->type[GST_STREAM_TYPE_VIDEO - 1].preroll,
"src"));
}
}

50
gst/playback/gststreaminfo.c
View file

@ -25,6 +25,9 @@
#include <gst/gst.h>
#include "gststreaminfo.h"
GST_DEBUG_CATEGORY_STATIC (gst_streaminfo_debug);
#define GST_CAT_DEFAULT gst_streaminfo_debug
/* props */
enum
{
@ -70,6 +73,9 @@ static void gst_stream_info_class_init (GstStreamInfoClass * klass);
static void gst_stream_info_init (GstStreamInfo * stream_info);
static void gst_stream_info_dispose (GObject * object);
static void stream_info_change_state (GstElement * element,
gint old_state, gint new_state, gpointer data);
static void gst_stream_info_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * spec);
static void gst_stream_info_get_property (GObject * object, guint prop_id,
@ -140,6 +146,9 @@ gst_stream_info_class_init (GstStreamInfoClass * klass)
gst_marshal_VOID__BOOLEAN, G_TYPE_NONE, 1, G_TYPE_BOOLEAN);
gobject_klass->dispose = GST_DEBUG_FUNCPTR (gst_stream_info_dispose);
GST_DEBUG_CATEGORY_INIT (gst_streaminfo_debug, "streaminfo", 0,
"Playbin Stream Info");
}
@ -181,8 +190,16 @@ gst_stream_info_dispose (GObject * object)
stream_info = GST_STREAM_INFO (object);
gst_object_unref (stream_info->object);
stream_info->object = NULL;
if (stream_info->object) {
if (GST_PAD_REALIZE (stream_info->object)) {
g_signal_handlers_disconnect_by_func (gst_pad_get_parent ((GstPad *)
GST_PAD_REALIZE (stream_info->object)),
G_CALLBACK (stream_info_change_state), stream_info);
}
gst_object_unref (stream_info->object);
stream_info->object = NULL;
}
stream_info->origin = NULL;
stream_info->type = GST_STREAM_TYPE_UNKNOWN;
g_free (stream_info->decoder);
@ -207,6 +224,8 @@ stream_info_mute_pad (GstStreamInfo * stream_info, GstPad * pad, gboolean mute)
GST_DEBUG_OBJECT (stream_info, "%s %s:%s", debug_str,
GST_DEBUG_PAD_NAME (pad));
gst_pad_set_active (pad, activate);
if (gst_pad_get_parent (pad)->numsrcpads > 1)
return;
for (int_links = gst_pad_get_internal_links (pad);
int_links; int_links = g_list_next (int_links)) {
@ -231,6 +250,20 @@ stream_info_mute_pad (GstStreamInfo * stream_info, GstPad * pad, gboolean mute)
}
}
static void
stream_info_change_state (GstElement * element,
gint old_state, gint new_state, gpointer data)
{
GstStreamInfo *stream_info = data;
if (new_state == GST_STATE_PLAYING) {
/* state change will annoy us */
g_return_if_fail (stream_info->mute == TRUE);
GST_DEBUG_OBJECT (stream_info, "Re-muting pads after state-change");
stream_info_mute_pad (stream_info, GST_PAD (stream_info->object), TRUE);
}
}
gboolean
gst_stream_info_set_mute (GstStreamInfo * stream_info, gboolean mute)
{
@ -243,7 +276,18 @@ gst_stream_info_set_mute (GstStreamInfo * stream_info, gboolean mute)
if (mute != stream_info->mute) {
stream_info->mute = mute;
stream_info_mute_pad (stream_info, GST_PAD (stream_info->object), mute);
stream_info_mute_pad (stream_info,
(GstPad *) GST_PAD_REALIZE (stream_info->object), mute);
if (mute) {
g_signal_connect (gst_pad_get_parent ((GstPad *)
GST_PAD_REALIZE (stream_info->object)), "state-change",
G_CALLBACK (stream_info_change_state), stream_info);
} else {
g_signal_handlers_disconnect_by_func (gst_pad_get_parent ((GstPad *)
GST_PAD_REALIZE (stream_info->object)),
G_CALLBACK (stream_info_change_state), stream_info);
}
}
return TRUE;
}

278
gst/playback/gststreamselector.c Normal file
View file

@ -0,0 +1,278 @@
/* GStreamer
* Copyright (C) 2003 Julien Moutte <julien@moutte.net>
* Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
*
* 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.
*/
/*
* !!!!!!!!!!!!!!!!! Big phat warning. !!!!!!!!!!!!!!!!!!!!!!
*
* The pads on the sinkside can be filled and the application is
* supposed to enable/disable them. The plugin will receive input
* data over the currently active pad and take care of data
* forwarding and negotiation. This plugin does nothing fancy. It
* exists to be light-weight and simple.
*
* This is not a generic switch element. This is not to be used for
* any such purpose. Patches to make it do that will be rejected.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gststreamselector.h"
GST_DEBUG_CATEGORY_STATIC (stream_selector_debug);
#define GST_CAT_DEFAULT stream_selector_debug
static GstStaticPadTemplate gst_stream_selector_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate gst_stream_selector_src_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static void gst_stream_selector_dispose (GObject * object);
static void gst_stream_selector_init (GstStreamSelector * sel);
static void gst_stream_selector_base_init (GstStreamSelectorClass * klass);
static void gst_stream_selector_class_init (GstStreamSelectorClass * klass);
static GstCaps *gst_stream_selector_get_caps (GstPad * pad);
static GstPadLinkReturn gst_stream_selector_link (GstPad * pad,
const GstCaps * caps);
static GList *gst_stream_selector_get_linked_pads (GstPad * pad);
static GstPad *gst_stream_selector_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * unused);
static void gst_stream_selector_chain (GstPad * pad, GstData * data);
static GstElementClass *parent_class = NULL;
GType
gst_stream_selector_get_type (void)
{
static GType stream_selector_type = 0;
if (!stream_selector_type) {
static const GTypeInfo stream_selector_info = {
sizeof (GstStreamSelectorClass),
(GBaseInitFunc) gst_stream_selector_base_init,
NULL,
(GClassInitFunc) gst_stream_selector_class_init,
NULL,
NULL,
sizeof (GstStreamSelector),
0,
(GInstanceInitFunc) gst_stream_selector_init,
};
stream_selector_type =
g_type_register_static (GST_TYPE_ELEMENT,
"GstStreamSelector", &stream_selector_info, 0);
GST_DEBUG_CATEGORY_INIT (stream_selector_debug,
"streamselector", 0, "A stream-selector element");
}
return stream_selector_type;
}
static void
gst_stream_selector_base_init (GstStreamSelectorClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
static GstElementDetails gst_stream_selector_details =
GST_ELEMENT_DETAILS ("StreamSelector",
"Generic",
"N-to-1 input stream_selectoring",
"Julien Moutte <julien@moutte.net>\n"
"Ronald S. Bultje <rbultje@ronald.bitfreak.net>");
gst_element_class_set_details (element_class, &gst_stream_selector_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_stream_selector_sink_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_stream_selector_src_factory));
}
static void
gst_stream_selector_class_init (GstStreamSelectorClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->dispose = gst_stream_selector_dispose;
gstelement_class->request_new_pad = gst_stream_selector_request_new_pad;
}
static void
gst_stream_selector_init (GstStreamSelector * sel)
{
sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_pad_set_internal_link_function (sel->srcpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_get_linked_pads));
gst_pad_set_link_function (sel->srcpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_link));
gst_pad_set_getcaps_function (sel->srcpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_get_caps));
gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
/* sinkpad management */
sel->last_active_sinkpad = NULL;
sel->nb_sinkpads = 0;
}
static void
gst_stream_selector_dispose (GObject * object)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (object);
sel->last_active_sinkpad = NULL;
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static GstPad *
gst_stream_selector_get_linked_pad (GstPad * pad)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (gst_pad_get_parent (pad));
GstPad *otherpad = NULL;
if (pad == sel->srcpad)
otherpad = sel->last_active_sinkpad;
else if (pad == sel->last_active_sinkpad)
otherpad = sel->srcpad;
return otherpad;
}
static GstCaps *
gst_stream_selector_get_caps (GstPad * pad)
{
GstPad *otherpad = gst_stream_selector_get_linked_pad (pad);
if (!otherpad) {
GST_DEBUG_OBJECT (gst_pad_get_parent (pad),
"Pad %s not linked, returning ANY", gst_pad_get_name (pad));
return gst_caps_new_any ();
}
GST_DEBUG_OBJECT (gst_pad_get_parent (pad),
"Pad %s is linked (to %s), returning allowed-caps",
gst_pad_get_name (pad), gst_pad_get_name (otherpad));
return gst_pad_get_allowed_caps (otherpad);
}
static GstPadLinkReturn
gst_stream_selector_link (GstPad * pad, const GstCaps * caps)
{
GstPad *otherpad = gst_stream_selector_get_linked_pad (pad);
if (!otherpad) {
GST_DEBUG_OBJECT (gst_pad_get_parent (pad),
"Pad %s not linked, returning %s",
gst_pad_get_name (pad), GST_PAD_IS_SINK (pad) ? "ok" : "delayed");
return GST_PAD_IS_SINK (pad) ? GST_PAD_LINK_OK : GST_PAD_LINK_DELAYED;
}
GST_DEBUG_OBJECT (gst_pad_get_parent (pad),
"Pad %s is linked (to %s), returning other-trysetcaps",
gst_pad_get_name (pad), gst_pad_get_name (otherpad));
return gst_pad_try_set_caps (otherpad, caps);
}
static GList *
gst_stream_selector_get_linked_pads (GstPad * pad)
{
GstPad *otherpad = gst_stream_selector_get_linked_pad (pad);
if (!otherpad)
return NULL;
return g_list_append (NULL, otherpad);
}
static GstPad *
gst_stream_selector_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * unused)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (element);
gchar *name = NULL;
GstPad *sinkpad = NULL;
g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
GST_LOG_OBJECT (sel, "Creating new pad %d", sel->nb_sinkpads);
name = g_strdup_printf ("sink%d", sel->nb_sinkpads++);
sinkpad = gst_pad_new_from_template (templ, name);
g_free (name);
gst_pad_set_link_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_link));
gst_pad_set_getcaps_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_get_caps));
gst_pad_set_chain_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_chain));
gst_pad_set_internal_link_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_get_linked_pads));
gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
return sinkpad;
}
static void
gst_stream_selector_chain (GstPad * pad, GstData * data)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (gst_pad_get_parent (pad));
/* first, check if the active pad changed. If so, redo
* negotiation and fail if that fails. */
if (pad != sel->last_active_sinkpad) {
GstPadLinkReturn ret;
GST_LOG_OBJECT (sel, "stream change detected, switching from %s to %s",
sel->last_active_sinkpad ?
gst_pad_get_name (sel->last_active_sinkpad) : "none",
gst_pad_get_name (pad));
sel->last_active_sinkpad = pad;
ret = gst_pad_renegotiate (pad);
if (GST_PAD_LINK_FAILED (ret)) {
GST_ELEMENT_ERROR (sel, CORE, NEGOTIATION, (NULL), (NULL));
sel->last_active_sinkpad = NULL;
return;
}
}
/* forward */
GST_DEBUG_OBJECT (sel, "Forwarding %s %p from pad %s",
GST_IS_EVENT (data) ? "event" : "buffer", data, gst_pad_get_name (pad));
gst_pad_push (sel->srcpad, data);
}

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/* GStreamer
* Copyright (C) 2003 Julien Moutte <julien@moutte.net>
* Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
*
* 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.
*/
#ifndef __GST_STREAM_SELECTOR_H__
#define __GST_STREAM_SELECTOR_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_STREAM_SELECTOR \
(gst_stream_selector_get_type())
#define GST_STREAM_SELECTOR(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_STREAM_SELECTOR, GstStreamSelector))
#define GST_STREAM_SELECTOR_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_STREAM_SELECTOR, GstStreamSelector))
#define GST_IS_STREAM_SELECTOR(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_STREAM_SELECTOR))
#define GST_IS_STREAM_SELECTOR_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_STREAM_SELECTOR))
typedef struct _GstStreamSelector GstStreamSelector;
typedef struct _GstStreamSelectorClass GstStreamSelectorClass;
struct _GstStreamSelector {
GstElement element;
GstPad *last_active_sinkpad;
GstPad *srcpad;
guint nb_sinkpads;
};
struct _GstStreamSelectorClass {
GstElementClass parent_class;
};
GType gst_stream_selector_get_type (void);
G_END_DECLS
#endif /* __GST_STREAM_SELECTOR_H__ */