gstreamer/gst/playback/gststreaminfo.c
2011-06-01 19:34:54 +02:00

404 lines
12 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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 <string.h>
#include <gst/gst.h>
#include "gststreaminfo.h"
GST_DEBUG_CATEGORY_STATIC (gst_streaminfo_debug);
#define GST_CAT_DEFAULT gst_streaminfo_debug
/* props */
enum
{
ARG_0,
ARG_PAD,
ARG_TYPE,
ARG_DECODER,
ARG_MUTE,
ARG_CAPS,
ARG_LANG_CODE,
ARG_CODEC
};
/* signals */
enum
{
SIGNAL_MUTED,
LAST_SIGNAL
};
static guint gst_stream_info_signals[LAST_SIGNAL] = { 0 };
#define GST_TYPE_STREAM_TYPE (gst_stream_type_get_type())
static GType
gst_stream_type_get_type (void)
{
static GType stream_type_type = 0;
static const GEnumValue stream_type[] = {
{GST_STREAM_TYPE_UNKNOWN, "Unknown stream", "unknown"},
{GST_STREAM_TYPE_AUDIO, "Audio stream", "audio"},
{GST_STREAM_TYPE_VIDEO, "Video stream", "video"},
{GST_STREAM_TYPE_TEXT, "Text stream", "text"},
{GST_STREAM_TYPE_SUBPICTURE, "Subpicture stream", "subpicture"},
{GST_STREAM_TYPE_ELEMENT,
"Stream handled by element", "element"},
{0, NULL, NULL},
};
if (!stream_type_type) {
stream_type_type = g_enum_register_static ("GstStreamType", stream_type);
}
return stream_type_type;
}
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,
GValue * value, GParamSpec * spec);
static GObjectClass *parent_class;
//static guint gst_stream_info_signals[LAST_SIGNAL] = { 0 };
GType
gst_stream_info_get_type (void)
{
static GType gst_stream_info_type = 0;
if (!gst_stream_info_type) {
static const GTypeInfo gst_stream_info_info = {
sizeof (GstStreamInfoClass),
NULL,
NULL,
(GClassInitFunc) gst_stream_info_class_init,
NULL,
NULL,
sizeof (GstStreamInfo),
0,
(GInstanceInitFunc) gst_stream_info_init,
NULL
};
gst_stream_info_type = g_type_register_static (G_TYPE_OBJECT,
"GstStreamInfo", &gst_stream_info_info, 0);
}
return gst_stream_info_type;
}
static void
gst_stream_info_class_init (GstStreamInfoClass * klass)
{
GObjectClass *gobject_klass;
gobject_klass = (GObjectClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_klass->set_property = gst_stream_info_set_property;
gobject_klass->get_property = gst_stream_info_get_property;
g_object_class_install_property (gobject_klass, ARG_PAD,
g_param_spec_object ("object", "object",
"Source Pad or object of the stream", GST_TYPE_OBJECT,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_klass, ARG_TYPE,
g_param_spec_enum ("type", "Type", "Type of the stream",
GST_TYPE_STREAM_TYPE, GST_STREAM_TYPE_UNKNOWN,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_klass, ARG_DECODER,
g_param_spec_string ("decoder", "Decoder",
"The decoder used to decode the stream", NULL,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_klass, ARG_MUTE,
g_param_spec_boolean ("mute", "Mute", "Mute or unmute this stream", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_klass, ARG_CAPS,
g_param_spec_boxed ("caps", "Capabilities",
"Capabilities (or type) of this stream", GST_TYPE_CAPS,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_klass, ARG_LANG_CODE,
g_param_spec_string ("language-code", "Language code",
"Language code for this stream, conforming to ISO-639-1", NULL,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_klass, ARG_CODEC,
g_param_spec_string ("codec", "Codec", "Codec used to encode the stream",
NULL, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
gst_stream_info_signals[SIGNAL_MUTED] =
g_signal_new ("muted", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstStreamInfoClass, muted), NULL, NULL,
gst_marshal_VOID__BOOLEAN, G_TYPE_NONE, 1, G_TYPE_BOOLEAN);
gobject_klass->dispose = gst_stream_info_dispose;
GST_DEBUG_CATEGORY_INIT (gst_streaminfo_debug, "streaminfo", 0,
"Playbin Stream Info");
}
static void
gst_stream_info_init (GstStreamInfo * stream_info)
{
stream_info->object = NULL;
stream_info->origin = NULL;
stream_info->type = GST_STREAM_TYPE_UNKNOWN;
stream_info->decoder = NULL;
stream_info->mute = FALSE;
stream_info->caps = NULL;
}
static GstProbeReturn
cb_probe (GstPad * pad, GstProbeType type, gpointer type_data,
gpointer user_data)
{
GstEvent *e = type_data;
GstStreamInfo *info = user_data;
if (GST_EVENT_TYPE (e) == GST_EVENT_TAG) {
gchar *codec, *lang;
GstTagList *list;
gst_event_parse_tag (e, &list);
if (info->type != GST_STREAM_TYPE_AUDIO &&
gst_tag_list_get_string (list, GST_TAG_VIDEO_CODEC, &codec)) {
g_free (info->codec);
info->codec = codec;
GST_LOG_OBJECT (pad, "codec = %s (video)", codec);
g_object_notify (G_OBJECT (info), "codec");
} else if (info->type != GST_STREAM_TYPE_VIDEO &&
gst_tag_list_get_string (list, GST_TAG_AUDIO_CODEC, &codec)) {
g_free (info->codec);
info->codec = codec;
GST_LOG_OBJECT (pad, "codec = %s (audio)", codec);
g_object_notify (G_OBJECT (info), "codec");
} else if (gst_tag_list_get_string (list, GST_TAG_CODEC, &codec)) {
g_free (info->codec);
info->codec = codec;
GST_LOG_OBJECT (pad, "codec = %s (generic)", codec);
g_object_notify (G_OBJECT (info), "codec");
}
if (gst_tag_list_get_string (list, GST_TAG_LANGUAGE_CODE, &lang)) {
g_free (info->langcode);
info->langcode = lang;
GST_LOG_OBJECT (pad, "language-code = %s", lang);
g_object_notify (G_OBJECT (info), "language-code");
}
}
return TRUE;
}
GstStreamInfo *
gst_stream_info_new (GstObject * object,
GstStreamType type, const gchar * decoder, const GstCaps * caps)
{
GstStreamInfo *info;
info = g_object_new (GST_TYPE_STREAM_INFO, NULL);
gst_object_ref (object);
if (GST_IS_PAD (object)) {
gst_pad_add_probe (GST_PAD_CAST (object), GST_PROBE_TYPE_EVENT,
cb_probe, info, NULL);
}
info->object = object;
info->type = type;
info->decoder = g_strdup (decoder);
info->origin = object;
if (caps) {
info->caps = gst_caps_copy (caps);
}
return info;
}
static void
gst_stream_info_dispose (GObject * object)
{
GstStreamInfo *stream_info;
stream_info = GST_STREAM_INFO (object);
if (stream_info->object) {
GstElement *parent;
parent = gst_pad_get_parent_element ((GstPad *)
GST_PAD_CAST (stream_info->object));
if (parent != NULL) {
g_signal_handlers_disconnect_by_func (parent,
(gpointer) stream_info_change_state, stream_info);
gst_object_unref (parent);
}
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);
stream_info->decoder = NULL;
g_free (stream_info->langcode);
stream_info->langcode = NULL;
g_free (stream_info->codec);
stream_info->codec = NULL;
if (stream_info->caps) {
gst_caps_unref (stream_info->caps);
stream_info->caps = NULL;
}
if (G_OBJECT_CLASS (parent_class)->dispose) {
G_OBJECT_CLASS (parent_class)->dispose (object);
}
}
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");
//gst_pad_set_active_recursive (GST_PAD (stream_info->object), FALSE);
g_warning ("FIXME");
}
}
gboolean
gst_stream_info_set_mute (GstStreamInfo * stream_info, gboolean mute)
{
g_return_val_if_fail (GST_IS_STREAM_INFO (stream_info), FALSE);
if (stream_info->type == GST_STREAM_TYPE_ELEMENT) {
g_warning ("cannot mute element stream");
return FALSE;
}
if (mute != stream_info->mute) {
/* nothing really happens here. it looks like gstplaybasebin installs a
* buffer probe hat drops buffers when muting. but the this removes it self
* after first call.
*/
stream_info->mute = mute;
#if 0
gst_pad_set_active ((GstPad *) GST_PAD_CAST (stream_info->object), !mute);
#endif
#if 0
{
GstElement *element;
element = gst_pad_get_parent_element ((GstPad *)
GST_PAD_CAST (stream_info->object));
if (element) {
if (mute) {
g_signal_connect (element, "state-changed",
G_CALLBACK (stream_info_change_state), stream_info);
} else {
g_signal_handlers_disconnect_by_func (element,
G_CALLBACK (stream_info_change_state), stream_info);
}
gst_object_unref (element);
}
}
#endif
}
return TRUE;
}
gboolean
gst_stream_info_is_mute (GstStreamInfo * stream_info)
{
g_return_val_if_fail (GST_IS_STREAM_INFO (stream_info), TRUE);
return stream_info->mute;
}
static void
gst_stream_info_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstStreamInfo *stream_info;
g_return_if_fail (GST_IS_STREAM_INFO (object));
stream_info = GST_STREAM_INFO (object);
switch (prop_id) {
case ARG_MUTE:
gst_stream_info_set_mute (stream_info, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_stream_info_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstStreamInfo *stream_info;
g_return_if_fail (GST_IS_STREAM_INFO (object));
stream_info = GST_STREAM_INFO (object);
switch (prop_id) {
case ARG_PAD:
g_value_set_object (value, stream_info->object);
break;
case ARG_TYPE:
g_value_set_enum (value, stream_info->type);
break;
case ARG_DECODER:
g_value_set_string (value, stream_info->decoder);
break;
case ARG_MUTE:
g_value_set_boolean (value, stream_info->mute);
break;
case ARG_CAPS:
g_value_set_boxed (value, stream_info->caps);
break;
case ARG_LANG_CODE:
g_value_set_string (value, stream_info->langcode);
break;
case ARG_CODEC:
g_value_set_string (value, stream_info->codec);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}