gstreamer/ext/resindvd/rsndec.c

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/* GStreamer
* Copyright (C) <2009> Jan Schmidt <thaytan@noraisin.net>
* Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
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#include <gst/video/video.h>
#include <gst/audio/audio.h>
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#include "rsndec.h"
GST_DEBUG_CATEGORY_STATIC (rsn_dec_debug);
#define GST_CAT_DEFAULT rsn_dec_debug
static GstStateChangeReturn rsn_dec_change_state (GstElement * element,
GstStateChange transition);
static void rsn_dec_dispose (GObject * gobj);
static void cleanup_child (RsnDec * self);
static GstBinClass *rsn_dec_parent_class = NULL;
static void
rsn_dec_class_init (RsnDecClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (rsn_dec_debug, "rsndec",
0, "Resin DVD stream decoder");
rsn_dec_parent_class = (GstBinClass *) g_type_class_peek_parent (klass);
object_class->dispose = rsn_dec_dispose;
element_class->change_state = GST_DEBUG_FUNCPTR (rsn_dec_change_state);
}
static gboolean
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rsn_dec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
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RsnDec *self = RSN_DEC (parent);
gboolean ret = TRUE;
const GstStructure *s = gst_event_get_structure (event);
const gchar *name = (s ? gst_structure_get_name (s) : NULL);
if (name && g_str_equal (name, "application/x-gst-dvd"))
ret = gst_pad_push_event (GST_PAD_CAST (self->srcpad), event);
else
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ret = self->sink_event_func (pad, parent, event);
return ret;
}
static void
rsn_dec_init (RsnDec * self, RsnDecClass * klass)
{
GstPadTemplate *templ;
templ =
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "sink");
g_assert (templ != NULL);
self->sinkpad =
GST_GHOST_PAD_CAST (gst_ghost_pad_new_no_target_from_template ("sink",
templ));
self->sink_event_func = GST_PAD_EVENTFUNC (self->sinkpad);
gst_pad_set_event_function (GST_PAD_CAST (self->sinkpad),
GST_DEBUG_FUNCPTR (rsn_dec_sink_event));
templ = gst_element_class_get_pad_template (GST_ELEMENT_CLASS (klass), "src");
g_assert (templ != NULL);
self->srcpad =
GST_GHOST_PAD_CAST (gst_ghost_pad_new_no_target_from_template ("src",
templ));
gst_element_add_pad (GST_ELEMENT (self), GST_PAD_CAST (self->sinkpad));
gst_element_add_pad (GST_ELEMENT (self), GST_PAD_CAST (self->srcpad));
}
static void
rsn_dec_dispose (GObject * object)
{
RsnDec *self = (RsnDec *) object;
cleanup_child (self);
G_OBJECT_CLASS (rsn_dec_parent_class)->dispose (object);
}
static gboolean
rsn_dec_set_child (RsnDec * self, GstElement * new_child)
{
GstPad *child_pad;
if (self->current_decoder) {
gst_ghost_pad_set_target (self->srcpad, NULL);
gst_ghost_pad_set_target (self->sinkpad, NULL);
gst_bin_remove ((GstBin *) self, self->current_decoder);
self->current_decoder = NULL;
}
if (new_child == NULL)
return TRUE;
if (!gst_bin_add ((GstBin *) self, new_child))
return FALSE;
child_pad = gst_element_get_static_pad (new_child, "sink");
if (child_pad == NULL) {
return FALSE;
}
gst_ghost_pad_set_target (self->sinkpad, child_pad);
gst_object_unref (child_pad);
child_pad = gst_element_get_static_pad (new_child, "src");
if (child_pad == NULL) {
return FALSE;
}
gst_ghost_pad_set_target (self->srcpad, child_pad);
gst_object_unref (child_pad);
GST_DEBUG_OBJECT (self, "Add child %" GST_PTR_FORMAT, new_child);
self->current_decoder = new_child;
gst_element_sync_state_with_parent (new_child);
return TRUE;
}
static void
cleanup_child (RsnDec * self)
{
GST_DEBUG_OBJECT (self, "Removing child element");
(void) rsn_dec_set_child (self, NULL);
}
typedef struct
{
GstCaps *desired_caps;
GstCaps *decoder_caps;
} RsnDecFactoryFilterCtx;
static gboolean
rsndec_factory_filter (GstPluginFeature * feature, RsnDecFactoryFilterCtx * ctx)
{
GstElementFactory *factory;
guint rank;
const gchar *klass;
const GList *templates;
GList *walk;
gboolean can_sink = FALSE;
/* we only care about element factories */
if (!GST_IS_ELEMENT_FACTORY (feature))
return FALSE;
factory = GST_ELEMENT_FACTORY (feature);
klass =
gst_element_factory_get_metadata (factory, GST_ELEMENT_METADATA_KLASS);
/* only decoders can play */
if (strstr (klass, "Decoder") == NULL)
return FALSE;
/* only select elements with autoplugging rank */
rank = gst_plugin_feature_get_rank (feature);
if (rank < GST_RANK_MARGINAL)
return FALSE;
/* See if the element has a sink pad that can possibly sink this caps */
/* get the templates from the element factory */
templates = gst_element_factory_get_static_pad_templates (factory);
for (walk = (GList *) templates; walk && !can_sink; walk = g_list_next (walk)) {
GstStaticPadTemplate *templ = walk->data;
/* we only care about the sink templates */
if (templ->direction == GST_PAD_SINK) {
GstCaps *intersect;
GstCaps *tmpl_caps;
/* try to intersect the caps with the caps of the template */
tmpl_caps = gst_static_caps_get (&templ->static_caps);
intersect = gst_caps_intersect (ctx->desired_caps, tmpl_caps);
gst_caps_unref (tmpl_caps);
/* check if the intersection is empty */
if (!gst_caps_is_empty (intersect)) {
/* non empty intersection, we can use this element */
can_sink = TRUE;
ctx->decoder_caps = gst_caps_merge (ctx->decoder_caps, intersect);
} else
gst_caps_unref (intersect);
}
}
if (can_sink) {
GST_DEBUG ("Found decoder element %s (%s)",
gst_element_factory_get_metadata (factory,
GST_ELEMENT_METADATA_LONGNAME),
gst_plugin_feature_get_name (feature));
}
return can_sink;
}
static gint
sort_by_ranks (GstPluginFeature * f1, GstPluginFeature * f2)
{
gint diff;
const gchar *rname1, *rname2;
diff = gst_plugin_feature_get_rank (f2) - gst_plugin_feature_get_rank (f1);
if (diff != 0)
return diff;
rname1 = gst_plugin_feature_get_name (f1);
rname2 = gst_plugin_feature_get_name (f2);
diff = strcmp (rname2, rname1);
return diff;
}
static gpointer
_get_decoder_factories (gpointer arg)
{
GstElementClass *klass = arg;
GList *factories;
GstPadTemplate *templ = gst_element_class_get_pad_template (klass,
"sink");
RsnDecFactoryFilterCtx ctx = { NULL, };
GstCaps *raw;
gboolean raw_audio;
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GstRegistry *registry = gst_registry_get ();
ctx.desired_caps = gst_pad_template_get_caps (templ);
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raw =
gst_caps_from_string
("audio/x-raw,format=(string){ F32LE, F32BE, F64LE, F64BE }");
raw_audio = gst_caps_can_intersect (raw, ctx.desired_caps);
if (raw_audio) {
GstCaps *sub = gst_caps_subtract (ctx.desired_caps, raw);
ctx.desired_caps = sub;
} else {
gst_caps_ref (ctx.desired_caps);
}
gst_caps_unref (raw);
/* Set decoder caps to empty. Will be filled by the factory_filter */
ctx.decoder_caps = gst_caps_new_empty ();
GST_DEBUG ("Finding factories for caps: %" GST_PTR_FORMAT, ctx.desired_caps);
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factories = gst_registry_feature_filter (registry,
(GstPluginFeatureFilter) rsndec_factory_filter, FALSE, &ctx);
/* If these are audio caps, we add audioconvert, which is not a decoder,
but allows raw audio to go through relatively unmolested - this will
come handy when we have to send placeholder silence to allow preroll
for those DVDs which have titles with no audio track. */
if (raw_audio) {
GstPluginFeature *feature;
GST_DEBUG ("These are audio caps, adding audioconvert");
feature =
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gst_registry_find_feature (registry, "audioconvert",
GST_TYPE_ELEMENT_FACTORY);
if (feature) {
factories = g_list_append (factories, feature);
} else {
GST_WARNING ("Could not find feature audioconvert");
}
}
factories = g_list_sort (factories, (GCompareFunc) sort_by_ranks);
GST_DEBUG ("Available decoder caps %" GST_PTR_FORMAT, ctx.decoder_caps);
gst_caps_unref (ctx.decoder_caps);
gst_caps_unref (ctx.desired_caps);
return factories;
}
static GstStateChangeReturn
rsn_dec_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
RsnDec *self = RSN_DEC (element);
RsnDecClass *klass = RSN_DEC_GET_CLASS (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:{
GstElement *new_child;
const GList *decoder_factories;
new_child = gst_element_factory_make ("autoconvert", NULL);
decoder_factories = klass->get_decoder_factories (klass);
g_object_set (G_OBJECT (new_child), "factories", decoder_factories, NULL);
if (new_child == NULL || !rsn_dec_set_child (self, new_child))
ret = GST_STATE_CHANGE_FAILURE;
break;
}
case GST_STATE_CHANGE_READY_TO_PAUSED:
break;
default:
break;
}
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
ret =
GST_ELEMENT_CLASS (rsn_dec_parent_class)->change_state (element,
transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_NULL:
cleanup_child (self);
break;
default:
break;
}
return ret;
}
GType
rsn_dec_get_type (void)
{
static gsize type = 0;
if (g_once_init_enter (&type)) {
GType _type;
static const GTypeInfo type_info = {
sizeof (RsnDecClass),
NULL,
NULL,
(GClassInitFunc) rsn_dec_class_init,
NULL,
NULL,
sizeof (RsnDec),
0,
(GInstanceInitFunc) rsn_dec_init,
};
_type = g_type_register_static (GST_TYPE_BIN,
"RsnDec", &type_info, G_TYPE_FLAG_ABSTRACT);
g_once_init_leave (&type, _type);
}
return type;
}
/* Audio decoder subclass */
static GstStaticPadTemplate audio_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;"
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"audio/x-private1-dts; audio/x-raw,format=(string)"
GST_AUDIO_FORMATS_ALL)
);
static GstStaticPadTemplate audio_src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_AUDIO_CAPS_MAKE (GST_AUDIO_FORMATS_ALL))
);
G_DEFINE_TYPE (RsnAudioDec, rsn_audiodec, RSN_TYPE_DEC);
static const GList *
rsn_audiodec_get_decoder_factories (RsnDecClass * klass)
{
static GOnce gonce = G_ONCE_INIT;
g_once (&gonce, _get_decoder_factories, klass);
return (const GList *) gonce.retval;
}
static void
rsn_audiodec_class_init (RsnAudioDecClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
RsnDecClass *dec_class = RSN_DEC_CLASS (klass);
gst_element_class_add_static_pad_template (element_class,
&audio_src_template);
gst_element_class_add_static_pad_template (element_class,
&audio_sink_template);
gst_element_class_set_static_metadata (element_class, "RsnAudioDec",
"Audio/Decoder",
"Resin DVD audio stream decoder", "Jan Schmidt <thaytan@noraisin.net>");
dec_class->get_decoder_factories = rsn_audiodec_get_decoder_factories;
}
static void
rsn_audiodec_init (RsnAudioDec * self)
{
}
/* Video decoder subclass */
static GstStaticPadTemplate video_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/mpeg, "
"mpegversion = (int) [ 1, 2 ], " "systemstream = (bool) FALSE")
);
static GstStaticPadTemplate video_src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS_ALL))
);
G_DEFINE_TYPE (RsnVideoDec, rsn_videodec, RSN_TYPE_DEC);
static const GList *
rsn_videodec_get_decoder_factories (RsnDecClass * klass)
{
static GOnce gonce = G_ONCE_INIT;
g_once (&gonce, _get_decoder_factories, klass);
return (const GList *) gonce.retval;
}
static void
rsn_videodec_class_init (RsnAudioDecClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
RsnDecClass *dec_class = RSN_DEC_CLASS (klass);
gst_element_class_add_static_pad_template (element_class,
&video_src_template);
gst_element_class_add_static_pad_template (element_class,
&video_sink_template);
gst_element_class_set_static_metadata (element_class, "RsnVideoDec",
"Video/Decoder",
"Resin DVD video stream decoder", "Jan Schmidt <thaytan@noraisin.net>");
dec_class->get_decoder_factories = rsn_videodec_get_decoder_factories;
}
static void
rsn_videodec_init (RsnVideoDec * self)
{
}