gstreamer/ext/resindvd/rsnaudiodec.c

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/* GStreamer
* Copyright (C) <2009> Jan Schmidt <thaytan@noraisin.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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "rsnaudiodec.h"
GST_DEBUG_CATEGORY_STATIC (rsn_audiodec_debug);
#define GST_CAT_DEFAULT rsn_audiodec_debug
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/mpeg,mpegversion=(int)1;"
"audio/x-private1-lpcm;"
"audio/x-private1-ac3;" "audio/ac3;" "audio/x-ac3;"
"audio/x-private1-dts;")
);
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-float, "
"rate = (int) [ 1, MAX ], "
"channels = (int) [ 1, MAX ], "
"endianness = (int) BYTE_ORDER, "
"width = (int) { 32, 64 }; "
"audio/x-raw-int, "
"rate = (int) [ 1, MAX ], "
"channels = (int) [ 1, MAX ], "
"endianness = (int) BYTE_ORDER, "
"width = (int) 32, "
"depth = (int) 32, "
"signed = (boolean) true; "
"audio/x-raw-int, "
"rate = (int) [ 1, MAX ], "
"channels = (int) [ 1, MAX ], "
"endianness = (int) BYTE_ORDER, "
"width = (int) 24, "
"depth = (int) 24, "
"signed = (boolean) true; "
"audio/x-raw-int, "
"rate = (int) [ 1, MAX ], "
"channels = (int) [ 1, MAX ], "
"endianness = (int) BYTE_ORDER, "
"width = (int) 16, "
"depth = (int) 16, "
"signed = (boolean) true; "
"audio/x-raw-int, "
"rate = (int) [ 1, MAX ], "
"channels = (int) [ 1, MAX ], "
"endianness = (int) BYTE_ORDER, "
"width = (int) 8, " "depth = (int) 8, " "signed = (boolean) true")
);
G_DEFINE_TYPE (RsnAudioDec, rsn_audiodec, GST_TYPE_BIN);
static gboolean rsn_audiodec_set_sink_caps (GstPad * pad, GstCaps * caps);
static GstCaps *rsn_audiodec_get_sink_caps (GstPad * pad);
static GstFlowReturn rsn_audiodec_chain (GstPad * pad, GstBuffer * buf);
static gboolean rsn_audiodec_sink_event (GstPad * pad, GstEvent * event);
static GstStateChangeReturn rsn_audiodec_change_state (GstElement * element,
GstStateChange transition);
static GstCaps *rsn_audiodec_get_proxy_sink_caps (GstPad * pad);
static GstCaps *rsn_audiodec_get_proxy_src_caps (GstPad * pad);
static GstFlowReturn rsn_audiodec_proxy_src_chain (GstPad * pad,
GstBuffer * buf);
static gboolean rsn_audiodec_proxy_src_event (GstPad * pad, GstEvent * event);
static void rsn_audiodec_dispose (GObject * gobj);
static void cleanup_child (RsnAudioDec * self);
static void
rsn_audiodec_class_init (RsnAudioDecClass * klass)
{
static GstElementDetails element_details = {
"RsnAudioDec",
"Audio/Decoder",
"Resin DVD audio stream decoder",
"Jan Schmidt <thaytan@noraisin.net>"
};
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (rsn_audiodec_debug, "rsnaudiodec",
0, "Resin DVD audio stream decoder");
object_class->dispose = rsn_audiodec_dispose;
element_class->change_state = GST_DEBUG_FUNCPTR (rsn_audiodec_change_state);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_details (element_class, &element_details);
}
static void
rsn_audiodec_init (RsnAudioDec * self)
{
self->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
gst_pad_set_setcaps_function (self->sinkpad,
GST_DEBUG_FUNCPTR (rsn_audiodec_set_sink_caps));
gst_pad_set_getcaps_function (self->sinkpad,
GST_DEBUG_FUNCPTR (rsn_audiodec_get_sink_caps));
gst_pad_set_chain_function (self->sinkpad,
GST_DEBUG_FUNCPTR (rsn_audiodec_chain));
gst_pad_set_event_function (self->sinkpad,
GST_DEBUG_FUNCPTR (rsn_audiodec_sink_event));
gst_element_add_pad (GST_ELEMENT (self), self->sinkpad);
self->srcpad = gst_pad_new_from_static_template (&src_template, "src");
gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
}
static void
rsn_audiodec_dispose (GObject * object)
{
RsnAudioDec *self = (RsnAudioDec *) object;
cleanup_child (self);
G_OBJECT_CLASS (rsn_audiodec_parent_class)->dispose (object);
}
static gboolean
rsn_audiodec_set_sink_caps (GstPad * pad, GstCaps * caps)
{
RsnAudioDec *self = (RsnAudioDec *) gst_pad_get_parent (pad);
gboolean res;
if (self == NULL)
goto error;
res = gst_pad_set_caps (self->child_sink, caps);
gst_object_unref (self);
return res;
error:
if (self)
gst_object_unref (self);
return FALSE;
}
static GstCaps *
rsn_audiodec_get_sink_caps (GstPad * sinkpad)
{
/* FIXME: Calculate set of allowed caps for all discovered decoders */
RsnAudioDec *self = (RsnAudioDec *) gst_pad_get_parent (sinkpad);
GstCaps *res;
if (self == NULL || self->child_sink == NULL)
goto error;
res = gst_pad_get_caps (self->child_sink);
GST_INFO_OBJECT (self, "Returning caps %" GST_PTR_FORMAT, res);
gst_object_unref (self);
return res;
error:
if (self)
gst_object_unref (self);
return gst_caps_copy (gst_pad_get_pad_template_caps (sinkpad));
}
static GstFlowReturn
rsn_audiodec_chain (GstPad * pad, GstBuffer * buf)
{
RsnAudioDec *self = (RsnAudioDec *) gst_pad_get_parent (pad);
GstFlowReturn res;
if (self == NULL)
goto error;
GST_INFO_OBJECT (self, "Pushing buffer %" GST_PTR_FORMAT " into decoder",
buf);
res = gst_pad_chain (self->child_sink, buf);
gst_object_unref (self);
return res;
error:
if (self)
gst_object_unref (self);
return GST_FLOW_ERROR;
}
static gboolean
rsn_audiodec_sink_event (GstPad * pad, GstEvent * event)
{
GstPad *sinkpad = GST_PAD (gst_pad_get_parent (pad));
RsnAudioDec *self = (RsnAudioDec *) gst_pad_get_parent (sinkpad);
gboolean res;
gst_object_unref (sinkpad);
if (self == NULL)
goto error;
GST_INFO_OBJECT (self, "Sending event %" GST_PTR_FORMAT " into decoder",
event);
res = gst_pad_send_event (self->child_sink, event);
gst_object_unref (self);
return res;
error:
if (self)
gst_object_unref (self);
return FALSE;
}
static GstCaps *
rsn_audiodec_get_proxy_sink_caps (GstPad * pad)
{
GstPad *sinkpad = GST_PAD (gst_pad_get_parent (pad));
GstCaps *ret;
if (sinkpad != NULL) {
ret = gst_pad_get_caps (sinkpad);
} else
ret = gst_caps_new_any ();
gst_object_unref (sinkpad);
return ret;
}
static GstCaps *
rsn_audiodec_get_proxy_src_caps (GstPad * pad)
{
GstPad *srcpad = GST_PAD (gst_pad_get_parent (pad));
GstCaps *ret;
if (srcpad != NULL) {
ret = gst_pad_get_caps (srcpad);
} else
ret = gst_caps_new_any ();
gst_object_unref (srcpad);
return ret;
}
static GstFlowReturn
rsn_audiodec_proxy_src_chain (GstPad * pad, GstBuffer * buf)
{
GstPad *srcpad = GST_PAD (gst_pad_get_parent (pad));
RsnAudioDec *self = (RsnAudioDec *) gst_pad_get_parent (srcpad);
GstFlowReturn ret;
gst_object_unref (srcpad);
if (self == NULL)
return GST_FLOW_ERROR;
GST_DEBUG_OBJECT (self, "Data from decoder, pushing to pad %"
GST_PTR_FORMAT, self->srcpad);
ret = gst_pad_push (self->srcpad, buf);
gst_object_unref (self);
return ret;
}
static gboolean
rsn_audiodec_proxy_src_event (GstPad * pad, GstEvent * event)
{
GstPad *srcpad = GST_PAD (gst_pad_get_parent (pad));
RsnAudioDec *self = (RsnAudioDec *) gst_pad_get_parent (srcpad);
gboolean ret;
gst_object_unref (srcpad);
if (self == NULL)
return FALSE;
ret = gst_pad_push_event (self->srcpad, event);
gst_object_unref (self);
return ret;
}
static void
create_proxy_pads (RsnAudioDec * self)
{
if (self->child_sink_proxy == NULL) {
/* A src pad the child can query/send events to */
self->child_sink_proxy = gst_pad_new ("sink_proxy", GST_PAD_SRC);
gst_object_set_parent ((GstObject *) self->child_sink_proxy,
(GstObject *) self->sinkpad);
gst_pad_set_getcaps_function (self->child_sink_proxy,
GST_DEBUG_FUNCPTR (rsn_audiodec_get_proxy_sink_caps));
}
if (self->child_src_proxy == NULL) {
/* A sink pad the child can push to */
self->child_src_proxy = gst_pad_new ("src_proxy", GST_PAD_SINK);
gst_object_set_parent ((GstObject *) self->child_src_proxy,
(GstObject *) self->srcpad);
gst_pad_set_getcaps_function (self->child_src_proxy,
GST_DEBUG_FUNCPTR (rsn_audiodec_get_proxy_src_caps));
gst_pad_set_chain_function (self->child_src_proxy,
GST_DEBUG_FUNCPTR (rsn_audiodec_proxy_src_chain));
gst_pad_set_event_function (self->child_src_proxy,
GST_DEBUG_FUNCPTR (rsn_audiodec_proxy_src_event));
}
}
static gboolean
rsn_audiodec_set_child (RsnAudioDec * self, GstElement * new_child)
{
if (self->current_decoder) {
gst_bin_remove ((GstBin *) self, self->current_decoder);
self->current_decoder = NULL;
}
if (self->child_sink) {
(void) gst_pad_unlink (self->child_sink_proxy, self->child_sink);
gst_object_unref (self->child_sink);
self->child_sink = NULL;
}
if (self->child_src) {
(void) gst_pad_unlink (self->child_src, self->child_src_proxy);
gst_object_unref (self->child_src);
self->child_src = NULL;
}
if (new_child == NULL)
return TRUE;
self->child_sink = gst_element_get_static_pad (new_child, "sink");
if (self->child_sink == NULL) {
return FALSE;
}
self->child_src = gst_element_get_static_pad (new_child, "src");
if (self->child_src == NULL) {
return FALSE;
}
if (!gst_bin_add ((GstBin *) self, new_child)) {
return FALSE;
}
GST_DEBUG_OBJECT (self, "Add child %" GST_PTR_FORMAT, new_child);
self->current_decoder = new_child;
if (gst_pad_link (self->child_sink_proxy,
self->child_sink) != GST_PAD_LINK_OK)
return FALSE;
GST_DEBUG_OBJECT (self, "linked proxy sink pad %" GST_PTR_FORMAT
" to child sink %" GST_PTR_FORMAT, self->child_sink_proxy,
self->child_sink);
if (gst_pad_link (self->child_src, self->child_src_proxy) != GST_PAD_LINK_OK)
return FALSE;
GST_DEBUG_OBJECT (self, "linked child src pad %" GST_PTR_FORMAT
" to proxy pad %" GST_PTR_FORMAT, self->child_src, self->child_src_proxy);
return TRUE;
}
static void
cleanup_child (RsnAudioDec * self)
{
GST_DEBUG_OBJECT (self, "Removing child element");
(void) rsn_audiodec_set_child (self, NULL);
GST_DEBUG_OBJECT (self, "Destroying proxy pads");
if (self->child_sink_proxy != NULL) {
gst_object_unparent ((GstObject *) self->child_sink_proxy);
self->child_sink_proxy = NULL;
}
if (self->child_src_proxy != NULL) {
gst_object_unparent ((GstObject *) self->child_src_proxy);
self->child_src_proxy = NULL;
}
}
static GstStateChangeReturn
rsn_audiodec_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
RsnAudioDec *self = RSN_AUDIODEC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:{
GstElement *new_child;
create_proxy_pads (self);
GST_DEBUG_OBJECT (self, "Created proxy pads");
new_child = gst_element_factory_make ("a52dec", NULL);
if (new_child == NULL || !rsn_audiodec_set_child (self, new_child))
ret = GST_STATE_CHANGE_FAILURE;
break;
}
case GST_STATE_CHANGE_READY_TO_PAUSED:
GST_DEBUG_OBJECT (self, "Activating proxy pads");
if (self->child_sink_proxy)
gst_pad_set_active (self->child_sink_proxy, TRUE);
if (self->child_src_proxy)
gst_pad_set_active (self->child_src_proxy, TRUE);
break;
default:
break;
}
ret =
GST_ELEMENT_CLASS (rsn_audiodec_parent_class)->change_state (element,
transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_DEBUG_OBJECT (self, "Deactivating proxy pads");
if (self->child_sink_proxy)
gst_pad_set_active (self->child_sink_proxy, FALSE);
if (self->child_src_proxy)
gst_pad_set_active (self->child_src_proxy, FALSE);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
cleanup_child (self);
break;
default:
break;
}
return ret;
}