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-rw-r--r--gst-libs/gst/signalprocessor/.gitignore7
-rw-r--r--gst-libs/gst/signalprocessor/Makefile.am8
-rw-r--r--gst-libs/gst/signalprocessor/gstsignalprocessor.c1024
-rw-r--r--gst-libs/gst/signalprocessor/gstsignalprocessor.h124
4 files changed, 1163 insertions, 0 deletions
diff --git a/gst-libs/gst/signalprocessor/.gitignore b/gst-libs/gst/signalprocessor/.gitignore
new file mode 100644
index 00000000..08f5ed37
--- /dev/null
+++ b/gst-libs/gst/signalprocessor/.gitignore
@@ -0,0 +1,7 @@
+Makefile
+Makefile.in
+*.o
+*.lo
+*.la
+.deps
+.libs
diff --git a/gst-libs/gst/signalprocessor/Makefile.am b/gst-libs/gst/signalprocessor/Makefile.am
new file mode 100644
index 00000000..a8455390
--- /dev/null
+++ b/gst-libs/gst/signalprocessor/Makefile.am
@@ -0,0 +1,8 @@
+lib_LTLIBRARIES = libgstsignalprocessor.la
+
+noinst_HEADERS = gstsignalprocessor.h
+
+libgstsignalprocessor_la_SOURCES = gstsignalprocessor.c
+libgstsignalprocessor_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_CFLAGS)
+libgstsignalprocessor_la_LDFLAGS = $(GST_PLUGINS_BASE_LIBS)
+
diff --git a/gst-libs/gst/signalprocessor/gstsignalprocessor.c b/gst-libs/gst/signalprocessor/gstsignalprocessor.c
new file mode 100644
index 00000000..d057ce85
--- /dev/null
+++ b/gst-libs/gst/signalprocessor/gstsignalprocessor.c
@@ -0,0 +1,1024 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ * 2000 Wim Taymans <wtay@chello.be>
+ * 2005 Wim Taymans <wim@fluendo.com>
+ *
+ * gstsignalprocessor.c:
+ *
+ * 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.
+ */
+
+/*
+ * SECTION:gstsignalprocessor
+ *
+ * This baseclass allows to write elements that need data on all pads before
+ * their processing function can run.
+ *
+ * In push mode (gst_signal_processor_chain) it operates as follows:
+ * 1. store each received buffer on the pad and decrement pending_in
+ * 2. when pending_in==0, process as much as we can and push outputs
+ *
+ * In pull mode (gst_signal_processor_getrange) is operates as follows:
+ * 1. if there is an output ready, deliver
+ * 2. otherwise pull from each sink-pad, process requested frames and deliver
+ * the buffer
+ */
+
+#include <stdlib.h>
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <gst/audio/audio.h>
+#include "gstsignalprocessor.h"
+
+
+GST_DEBUG_CATEGORY_STATIC (gst_signal_processor_debug);
+#define GST_CAT_DEFAULT gst_signal_processor_debug
+
+/* FIXME: this is mono only */
+static GstStaticCaps template_caps =
+GST_STATIC_CAPS (GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS);
+
+#define GST_TYPE_SIGNAL_PROCESSOR_PAD_TEMPLATE \
+ (gst_signal_processor_pad_template_get_type ())
+#define GST_SIGNAL_PROCESSOR_PAD_TEMPLATE(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SIGNAL_PROCESSOR_PAD_TEMPLATE,\
+ GstSignalProcessorPadTemplate))
+typedef struct _GstSignalProcessorPadTemplate GstSignalProcessorPadTemplate;
+typedef GstPadTemplateClass GstSignalProcessorPadTemplateClass;
+
+struct _GstSignalProcessorPadTemplate
+{
+ GstPadTemplate parent;
+
+ guint index;
+};
+
+static GType
+gst_signal_processor_pad_template_get_type (void)
+{
+ static GType type = 0;
+
+ if (!type) {
+ static const GTypeInfo info = {
+ sizeof (GstSignalProcessorPadTemplateClass), NULL, NULL, NULL, NULL,
+ NULL, sizeof (GstSignalProcessorPadTemplate), 0, NULL
+ };
+
+ type = g_type_register_static (GST_TYPE_PAD_TEMPLATE,
+ "GstSignalProcessorPadTemplate", &info, 0);
+ }
+ return type;
+}
+
+/*
+ * gst_signal_processor_class_add_pad_template:
+ * @klass: element class
+ * @name: pad name
+ * @direction: pad direction (src/sink)
+ * @index: index for the pad per direction (starting from 0)
+ *
+ */
+void
+gst_signal_processor_class_add_pad_template (GstSignalProcessorClass * klass,
+ const gchar * name, GstPadDirection direction, guint index)
+{
+ GstPadTemplate *new;
+ GstCaps *caps;
+
+ g_return_if_fail (GST_IS_SIGNAL_PROCESSOR_CLASS (klass));
+ g_return_if_fail (name != NULL);
+ g_return_if_fail (direction == GST_PAD_SRC || direction == GST_PAD_SINK);
+
+ /* FIXME: would be nice to have the template as a parameter, right now this can
+ * only create mono pads */
+ caps = gst_caps_copy (gst_static_caps_get (&template_caps));
+
+ new = g_object_new (gst_signal_processor_pad_template_get_type (),
+ "name", name, "name-template", name,
+ "direction", direction, "presence", GST_PAD_ALWAYS, "caps", caps, NULL);
+
+ GST_SIGNAL_PROCESSOR_PAD_TEMPLATE (new)->index = index;
+
+ gst_element_class_add_pad_template (GST_ELEMENT_CLASS (klass), new);
+}
+
+
+#define GST_TYPE_SIGNAL_PROCESSOR_PAD (gst_signal_processor_pad_get_type ())
+#define GST_SIGNAL_PROCESSOR_PAD(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SIGNAL_PROCESSOR_PAD,\
+ GstSignalProcessorPad))
+typedef struct _GstSignalProcessorPad GstSignalProcessorPad;
+typedef GstPadClass GstSignalProcessorPadClass;
+
+struct _GstSignalProcessorPad
+{
+ GstPad parent;
+
+ GstBuffer *pen;
+
+ /* index for the pad per direction (starting from 0) */
+ guint index;
+
+ /* these are only used for sink pads */
+ guint samples_avail; /* available mono sample frames */
+ gfloat *data; /* data pointer to read from / write to */
+};
+
+static GType
+gst_signal_processor_pad_get_type (void)
+{
+ static GType type = 0;
+
+ if (!type) {
+ static const GTypeInfo info = {
+ sizeof (GstSignalProcessorPadClass), NULL, NULL, NULL, NULL,
+ NULL, sizeof (GstSignalProcessorPad), 0, NULL
+ };
+
+ type = g_type_register_static (GST_TYPE_PAD,
+ "GstSignalProcessorPad", &info, 0);
+ }
+ return type;
+}
+
+
+GST_BOILERPLATE (GstSignalProcessor, gst_signal_processor, GstElement,
+ GST_TYPE_ELEMENT);
+
+
+static void gst_signal_processor_finalize (GObject * object);
+static gboolean gst_signal_processor_src_activate_pull (GstPad * pad,
+ gboolean active);
+static gboolean gst_signal_processor_sink_activate_push (GstPad * pad,
+ gboolean active);
+static GstStateChangeReturn gst_signal_processor_change_state (GstElement *
+ element, GstStateChange transition);
+
+static gboolean gst_signal_processor_event (GstPad * pad, GstEvent * event);
+static GstFlowReturn gst_signal_processor_getrange (GstPad * pad,
+ guint64 offset, guint length, GstBuffer ** buffer);
+static GstFlowReturn gst_signal_processor_chain (GstPad * pad,
+ GstBuffer * buffer);
+static gboolean gst_signal_processor_setcaps (GstPad * pad, GstCaps * caps);
+
+
+static void
+gst_signal_processor_base_init (gpointer g_class)
+{
+ GST_DEBUG_CATEGORY_INIT (gst_signal_processor_debug, "gst-dsp", 0,
+ "signalprocessor element");
+}
+
+static void
+gst_signal_processor_class_init (GstSignalProcessorClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = G_OBJECT_CLASS (klass);
+ gstelement_class = GST_ELEMENT_CLASS (klass);
+
+ gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_signal_processor_finalize);
+
+ gstelement_class->change_state =
+ GST_DEBUG_FUNCPTR (gst_signal_processor_change_state);
+}
+
+static void
+gst_signal_processor_add_pad_from_template (GstSignalProcessor * self,
+ GstPadTemplate * templ)
+{
+ GstPad *new;
+
+ new = g_object_new (GST_TYPE_SIGNAL_PROCESSOR_PAD,
+ "name", GST_OBJECT_NAME (templ), "direction", templ->direction,
+ "template", templ, NULL);
+ GST_SIGNAL_PROCESSOR_PAD (new)->index =
+ GST_SIGNAL_PROCESSOR_PAD_TEMPLATE (templ)->index;
+
+ gst_pad_set_setcaps_function (new,
+ GST_DEBUG_FUNCPTR (gst_signal_processor_setcaps));
+
+ if (templ->direction == GST_PAD_SINK) {
+ GST_DEBUG ("added new sink pad");
+
+ gst_pad_set_event_function (new,
+ GST_DEBUG_FUNCPTR (gst_signal_processor_event));
+ gst_pad_set_chain_function (new,
+ GST_DEBUG_FUNCPTR (gst_signal_processor_chain));
+ gst_pad_set_activatepush_function (new,
+ GST_DEBUG_FUNCPTR (gst_signal_processor_sink_activate_push));
+ } else {
+ GST_DEBUG ("added new src pad");
+
+ gst_pad_set_getrange_function (new,
+ GST_DEBUG_FUNCPTR (gst_signal_processor_getrange));
+ gst_pad_set_activatepull_function (new,
+ GST_DEBUG_FUNCPTR (gst_signal_processor_src_activate_pull));
+ }
+
+ gst_element_add_pad (GST_ELEMENT (self), new);
+}
+
+static void
+gst_signal_processor_init (GstSignalProcessor * self,
+ GstSignalProcessorClass * klass)
+{
+ GList *templates;
+
+ templates =
+ gst_element_class_get_pad_template_list (GST_ELEMENT_CLASS (klass));
+
+ while (templates) {
+ GstPadTemplate *templ = GST_PAD_TEMPLATE (templates->data);
+
+ gst_signal_processor_add_pad_from_template (self, templ);
+ templates = templates->next;
+ }
+
+ self->state = GST_SIGNAL_PROCESSOR_STATE_NULL;
+
+ self->audio_in = g_new0 (gfloat *, klass->num_audio_in);
+ self->control_in = g_new0 (gfloat, klass->num_control_in);
+ self->audio_out = g_new0 (gfloat *, klass->num_audio_out);
+ self->control_out = g_new0 (gfloat, klass->num_control_out);
+
+ /* init */
+ self->pending_in = klass->num_audio_in;
+ self->pending_out = 0;
+
+ self->sample_rate = 0;
+}
+
+static void
+gst_signal_processor_finalize (GObject * object)
+{
+ GstSignalProcessor *self = GST_SIGNAL_PROCESSOR (object);
+
+ g_free (self->audio_in);
+ self->audio_in = NULL;
+ g_free (self->control_in);
+ self->control_in = NULL;
+ g_free (self->audio_out);
+ self->audio_out = NULL;
+ g_free (self->control_out);
+ self->control_out = NULL;
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gboolean
+gst_signal_processor_setup (GstSignalProcessor * self, guint sample_rate)
+{
+ GstSignalProcessorClass *klass;
+ gboolean ret = TRUE;
+
+ klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
+
+ GST_INFO_OBJECT (self, "setup()");
+
+ g_return_val_if_fail (self->state == GST_SIGNAL_PROCESSOR_STATE_NULL, FALSE);
+
+ if (klass->setup)
+ ret = klass->setup (self, sample_rate);
+
+ if (!ret)
+ goto setup_failed;
+
+ self->state = GST_SIGNAL_PROCESSOR_STATE_INITIALIZED;
+
+ return ret;
+
+setup_failed:
+ {
+ GST_INFO_OBJECT (self, "setup() failed at %u Hz", sample_rate);
+ return ret;
+ }
+}
+
+static gboolean
+gst_signal_processor_start (GstSignalProcessor * self)
+{
+ GstSignalProcessorClass *klass;
+ gboolean ret = TRUE;
+
+ klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
+
+ g_return_val_if_fail (self->state == GST_SIGNAL_PROCESSOR_STATE_INITIALIZED,
+ FALSE);
+
+ GST_INFO_OBJECT (self, "start()");
+
+ if (klass->start)
+ ret = klass->start (self);
+
+ if (!ret)
+ goto start_failed;
+
+ self->state = GST_SIGNAL_PROCESSOR_STATE_RUNNING;
+
+ return ret;
+
+start_failed:
+ {
+ GST_INFO_OBJECT (self, "start() failed");
+ return ret;
+ }
+}
+
+static void
+gst_signal_processor_stop (GstSignalProcessor * self)
+{
+ GstSignalProcessorClass *klass;
+ GstElement *elem;
+ GList *sinks;
+
+ klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
+ elem = GST_ELEMENT (self);
+
+ GST_INFO_OBJECT (self, "stop()");
+
+ g_return_if_fail (self->state == GST_SIGNAL_PROCESSOR_STATE_RUNNING);
+
+ if (klass->stop)
+ klass->stop (self);
+
+ for (sinks = elem->sinkpads; sinks; sinks = sinks->next)
+ /* force set_caps when going to RUNNING, see note in _setcaps () */
+ gst_pad_set_caps (GST_PAD (sinks->data), NULL);
+
+ /* should also flush our buffers perhaps? */
+
+ self->state = GST_SIGNAL_PROCESSOR_STATE_INITIALIZED;
+}
+
+static void
+gst_signal_processor_cleanup (GstSignalProcessor * self)
+{
+ GstSignalProcessorClass *klass;
+
+ klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
+
+ GST_INFO_OBJECT (self, "cleanup()");
+
+ g_return_if_fail (self->state == GST_SIGNAL_PROCESSOR_STATE_INITIALIZED);
+
+ if (klass->cleanup)
+ klass->cleanup (self);
+
+ self->state = GST_SIGNAL_PROCESSOR_STATE_NULL;
+}
+
+static gboolean
+gst_signal_processor_setcaps_pull (GstSignalProcessor * self, GstPad * pad,
+ GstCaps * caps)
+{
+ if (GST_PAD_IS_SRC (pad)) {
+ GList *l;
+
+ for (l = GST_ELEMENT (self)->sinkpads; l; l = l->next)
+ if (!gst_pad_set_caps (GST_PAD (l->data), caps))
+ goto src_setcaps_failed;
+ } else {
+ GstPad *peer;
+ gboolean res;
+
+ peer = gst_pad_get_peer (pad);
+ if (!peer)
+ goto unlinked_sink;
+
+ res = gst_pad_set_caps (peer, caps);
+ gst_object_unref (peer);
+
+ if (!res)
+ goto peer_setcaps_failed;
+ }
+
+ return TRUE;
+
+src_setcaps_failed:
+ {
+ /* not logging, presumably the sink pad already logged */
+ return FALSE;
+ }
+unlinked_sink:
+ {
+ GST_WARNING_OBJECT (self, "unlinked sink pad %" GST_PTR_FORMAT ", I wonder "
+ "how we passed activate_pull()", pad);
+ return FALSE;
+ }
+peer_setcaps_failed:
+ {
+ GST_INFO_OBJECT (self, "peer of %" GST_PTR_FORMAT " did not accept caps",
+ pad);
+ return FALSE;
+ }
+}
+
+static gboolean
+gst_signal_processor_setcaps (GstPad * pad, GstCaps * caps)
+{
+ GstSignalProcessor *self;
+
+ self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad));
+
+ if (self->mode == GST_ACTIVATE_PULL && !gst_caps_is_equal (caps, self->caps)
+ && !gst_signal_processor_setcaps_pull (self, pad, caps))
+ goto setcaps_pull_failed;
+
+ /* the whole processor has one caps; if the sample rate changes, let subclass
+ implementations know */
+ if (!gst_caps_is_equal (caps, self->caps)) {
+ GstStructure *s;
+ gint sample_rate;
+
+ GST_DEBUG_OBJECT (pad, "got caps %" GST_PTR_FORMAT, caps);
+
+ s = gst_caps_get_structure (caps, 0);
+ if (!gst_structure_get_int (s, "rate", &sample_rate)) {
+ GST_WARNING ("got no sample-rate");
+ goto impossible;
+ }
+
+ GST_DEBUG_OBJECT (self, "Got rate=%d", sample_rate);
+
+ if (GST_SIGNAL_PROCESSOR_IS_RUNNING (self))
+ gst_signal_processor_stop (self);
+ if (GST_SIGNAL_PROCESSOR_IS_INITIALIZED (self))
+ gst_signal_processor_cleanup (self);
+
+ if (!gst_signal_processor_setup (self, sample_rate))
+ goto start_or_setup_failed;
+
+ self->sample_rate = sample_rate;
+ gst_caps_replace (&self->caps, caps);
+ } else {
+ GST_DEBUG_OBJECT (self, "skipping, have caps already");
+ }
+
+ /* we use this method to manage the processor's state, hence the caps clearing
+ in stop(). so it can be that we enter here just to manage the processor's
+ state, to take it to RUNNING from already being INITIALIZED with the right
+ sample rate (e.g., when having gone PLAYING->READY->PLAYING). make sure
+ when we leave that the processor is RUNNING. */
+ if (!GST_SIGNAL_PROCESSOR_IS_INITIALIZED (self)
+ && !gst_signal_processor_setup (self, self->sample_rate))
+ goto start_or_setup_failed;
+ if (!GST_SIGNAL_PROCESSOR_IS_RUNNING (self)
+ && !gst_signal_processor_start (self))
+ goto start_or_setup_failed;
+
+ gst_object_unref (self);
+
+ return TRUE;
+
+start_or_setup_failed:
+ {
+ gst_object_unref (self);
+ return FALSE;
+ }
+setcaps_pull_failed:
+ {
+ gst_object_unref (self);
+ return FALSE;
+ }
+impossible:
+ {
+ g_critical ("something impossible happened");
+ gst_object_unref (self);
+ return FALSE;
+ }
+}
+
+static gboolean
+gst_signal_processor_event (GstPad * pad, GstEvent * event)
+{
+ GstSignalProcessor *self;
+ GstSignalProcessorClass *bclass;
+ gboolean ret;
+
+ self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad));
+ bclass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
+
+ /* FIXME, this probably isn't the correct interface: what about return values,
+ * what about overriding event_default
+ * Sync with GstBaseTransform::gst_base_transform_sink_event */
+ if (bclass->event)
+ bclass->event (self, event);
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_FLUSH_START:
+ break;
+ case GST_EVENT_FLUSH_STOP:
+ /* clear errors now */
+ self->flow_state = GST_FLOW_OK;
+ break;
+ default:
+ break;
+ }
+ ret = gst_pad_event_default (pad, event);
+
+ gst_object_unref (self);
+
+ return ret;
+}
+
+static guint
+gst_signal_processor_prepare (GstSignalProcessor * self, guint nframes)
+{
+ GstElement *elem = (GstElement *) self;
+ GstSignalProcessorClass *klass;
+ GList *sinks, *srcs;
+ guint samples_avail = nframes;
+
+ klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
+
+ /* first, assign audio_in pointers, and determine the number of samples that
+ * we can process */
+ for (sinks = elem->sinkpads; sinks; sinks = sinks->next) {
+ GstSignalProcessorPad *sinkpad;
+
+ sinkpad = (GstSignalProcessorPad *) sinks->data;
+ g_assert (sinkpad->samples_avail > 0);
+ samples_avail = MIN (samples_avail, sinkpad->samples_avail);
+ self->audio_in[sinkpad->index] = sinkpad->data;
+ }
+
+ /* FIXME: return if samples_avail==0 ? */
+
+ /* now assign output buffers. we can avoid allocation by reusing input
+ buffers, but only if process() can work in place, and if the input buffer
+ is the exact size of the number of samples we are processing. */
+ sinks = elem->sinkpads;
+ srcs = elem->srcpads;
+ if (GST_SIGNAL_PROCESSOR_CLASS_CAN_PROCESS_IN_PLACE (klass)) {
+ while (sinks && srcs) {
+ GstSignalProcessorPad *sinkpad, *srcpad;
+
+ sinkpad = (GstSignalProcessorPad *) sinks->data;
+ srcpad = (GstSignalProcessorPad *) srcs->data;
+
+ if (GST_BUFFER_SIZE (sinkpad->pen) == samples_avail * sizeof (gfloat)) {
+ /* reusable, yay */
+ g_assert (sinkpad->samples_avail == samples_avail);
+ srcpad->pen = sinkpad->pen;
+ sinkpad->pen = NULL;
+ self->audio_out[srcpad->index] = sinkpad->data;
+ self->pending_out++;
+
+ srcs = srcs->next;
+ }
+
+ sinks = sinks->next;
+ }
+ }
+
+ g_return_val_if_fail (GST_SIGNAL_PROCESSOR_IS_RUNNING (self), 0);
+
+ /* now allocate for any remaining outputs */
+ while (srcs) {
+ GstSignalProcessorPad *srcpad;
+ GstFlowReturn ret;
+
+ srcpad = (GstSignalProcessorPad *) srcs->data;
+
+ ret =
+ gst_pad_alloc_buffer_and_set_caps (GST_PAD (srcpad), -1,
+ samples_avail * sizeof (gfloat), self->caps, &srcpad->pen);
+
+ if (ret != GST_FLOW_OK) {
+ self->flow_state = ret;
+ return 0;
+ } else {
+ self->audio_out[srcpad->index] = (gfloat *) GST_BUFFER_DATA (srcpad->pen);
+ self->pending_out++;
+ }
+
+ srcs = srcs->next;
+ }
+
+ return samples_avail;
+}
+
+static void
+gst_signal_processor_update_inputs (GstSignalProcessor * self, guint nprocessed)
+{
+ GstElement *elem = (GstElement *) self;
+ GList *sinks;
+
+ for (sinks = elem->sinkpads; sinks; sinks = sinks->next) {
+ GstSignalProcessorPad *sinkpad;
+
+ sinkpad = (GstSignalProcessorPad *) sinks->data;
+ g_assert (sinkpad->samples_avail >= nprocessed);
+
+ if (sinkpad->pen && sinkpad->samples_avail == nprocessed) {
+ /* used up this buffer, unpen */
+ gst_buffer_unref (sinkpad->pen);
+ sinkpad->pen = NULL;
+ }
+
+ if (!sinkpad->pen) {
+ /* this buffer was used up */
+ self->pending_in++;
+ sinkpad->data = NULL;
+ sinkpad->samples_avail = 0;
+ } else {
+ /* advance ->data pointers and decrement ->samples_avail, unreffing buffer
+ if no samples are left */
+ sinkpad->samples_avail -= nprocessed;
+ sinkpad->data += nprocessed; /* gfloat* arithmetic */
+ }
+ }
+}
+
+static void
+gst_signal_processor_process (GstSignalProcessor * self, guint nframes)
+{
+ GstElement *elem;
+ GstSignalProcessorClass *klass;
+
+ /* check if we have buffers enqueued */
+ g_return_if_fail (self->pending_in == 0);
+ g_return_if_fail (self->pending_out == 0);
+
+ elem = GST_ELEMENT (self);
+
+ /* check how much input is available and prepare output buffers */
+ nframes = gst_signal_processor_prepare (self, nframes);
+ if (G_UNLIKELY (nframes == 0))
+ goto flow_error;
+
+ klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
+
+ GST_LOG_OBJECT (self, "process(%u)", nframes);
+
+ klass->process (self, nframes);
+
+ gst_signal_processor_update_inputs (self, nframes);
+
+ return;
+
+flow_error:
+ {
+ GST_WARNING ("gst_pad_alloc_buffer_and_set_caps() returned %d",
+ self->flow_state);
+ return;
+ }
+}
+
+static void
+gst_signal_processor_pen_buffer (GstSignalProcessor * self, GstPad * pad,
+ GstBuffer * buffer)
+{
+ GstSignalProcessorPad *spad = (GstSignalProcessorPad *) pad;
+
+ if (spad->pen)
+ goto had_buffer;
+
+ /* keep the reference */
+ spad->pen = buffer;
+ spad->data = (gfloat *) GST_BUFFER_DATA (buffer);
+ spad->samples_avail = GST_BUFFER_SIZE (buffer) / sizeof (float);
+
+ g_assert (self->pending_in != 0);
+
+ self->pending_in--;
+
+ return;
+
+ /* ERRORS */
+had_buffer:
+ {
+ GST_WARNING ("Pad %s:%s already has penned buffer",
+ GST_DEBUG_PAD_NAME (pad));
+ gst_buffer_unref (buffer);
+ return;
+ }
+}
+
+static void
+gst_signal_processor_flush (GstSignalProcessor * self)
+{
+ GList *pads;
+ GstSignalProcessorClass *klass;
+
+ klass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
+
+ GST_INFO_OBJECT (self, "flush()");
+
+ /* release enqueued buffers */
+ for (pads = GST_ELEMENT (self)->pads; pads; pads = pads->next) {
+ GstSignalProcessorPad *spad = (GstSignalProcessorPad *) pads->data;
+
+ if (spad->pen) {
+ gst_buffer_unref (spad->pen);
+ spad->pen = NULL;
+ spad->data = NULL;
+ spad->samples_avail = 0;
+ }
+ }
+
+ /* no outputs prepared and inputs for each pad needed */
+ self->pending_out = 0;
+ self->pending_in = klass->num_audio_in;
+}
+
+static void
+gst_signal_processor_do_pulls (GstSignalProcessor * self, guint nframes)
+{
+ GList *sinkpads;
+
+ /* FIXME: not threadsafe atm */
+
+ sinkpads = GST_ELEMENT (self)->sinkpads;
+
+ for (; sinkpads; sinkpads = sinkpads->next) {
+ GstSignalProcessorPad *spad = (GstSignalProcessorPad *) sinkpads->data;
+ GstFlowReturn ret = GST_FLOW_OK;
+ GstBuffer *buf;
+
+ if (spad->pen) {
+ g_warning ("Unexpectedly full buffer pen for pad %s:%s",
+ GST_DEBUG_PAD_NAME (spad));
+ continue;
+ }
+
+ ret =
+ gst_pad_pull_range (GST_PAD (spad), -1, nframes * sizeof (gfloat),
+ &buf);
+
+ if (ret != GST_FLOW_OK) {
+ gst_signal_processor_flush (self);
+ self->flow_state = ret;
+ return;
+ } else if (!buf) {
+ g_critical ("Pull failed to make a buffer!");
+ self->flow_state = GST_FLOW_ERROR;
+ return;
+ } else {
+ gst_signal_processor_pen_buffer (self, GST_PAD (spad), buf);
+ }
+ }
+
+ if (self->pending_in != 0) {
+ g_critical ("Something wierd happened...");
+ self->flow_state = GST_FLOW_ERROR;
+ } else {
+ gst_signal_processor_process (self, nframes);
+ }
+}
+
+static GstFlowReturn
+gst_signal_processor_getrange (GstPad * pad, guint64 offset,
+ guint length, GstBuffer ** buffer)
+{
+ GstSignalProcessor *self;
+ GstSignalProcessorPad *spad = (GstSignalProcessorPad *) pad;
+ GstFlowReturn ret = GST_FLOW_ERROR;
+
+ self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad));
+
+ if (spad->pen) {
+ *buffer = spad->pen;
+ spad->pen = NULL;
+ g_assert (self->pending_out != 0);
+ self->pending_out--;
+ ret = GST_FLOW_OK;
+ } else {
+ gst_signal_processor_do_pulls (self, length / sizeof (gfloat));
+ if (!spad->pen) {
+ /* this is an error condition */
+ *buffer = NULL;
+ ret = self->flow_state;
+ } else {
+ *buffer = spad->pen;
+ spad->pen = NULL;
+ self->pending_out--;
+ ret = GST_FLOW_OK;
+ }
+ }
+
+ GST_DEBUG_OBJECT (self, "returns %s", gst_flow_get_name (ret));
+
+ gst_object_unref (self);
+
+ return ret;
+}
+
+static void
+gst_signal_processor_do_pushes (GstSignalProcessor * self)
+{
+ GList *srcpads;
+
+ /* not threadsafe atm */
+
+ srcpads = GST_ELEMENT (self)->srcpads;
+
+ for (; srcpads; srcpads = srcpads->next) {
+ GstSignalProcessorPad *spad = (GstSignalProcessorPad *) srcpads->data;
+ GstFlowReturn ret = GST_FLOW_OK;
+ GstBuffer *buffer;
+
+ if (!spad->pen) {
+ g_warning ("Unexpectedly empty buffer pen for pad %s:%s",
+ GST_DEBUG_PAD_NAME (spad));
+ continue;
+ }
+
+ /* take buffer from pen */
+ buffer = spad->pen;
+ spad->pen = NULL;
+
+ ret = gst_pad_push (GST_PAD (spad), buffer);
+
+ if (ret != GST_FLOW_OK) {
+ gst_signal_processor_flush (self);
+ self->flow_state = ret;
+ return;
+ } else {
+ g_assert (self->pending_out > 0);
+ self->pending_out--;
+ }
+ }
+
+ if (self->pending_out != 0) {
+ g_critical ("Something wierd happened...");
+ self->flow_state = GST_FLOW_ERROR;
+ }
+}
+
+static GstFlowReturn
+gst_signal_processor_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstSignalProcessor *self;
+
+ self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad));
+
+ gst_signal_processor_pen_buffer (self, pad, buffer);
+
+ if (self->pending_in == 0) {
+ gst_signal_processor_process (self, G_MAXUINT);
+
+ gst_signal_processor_do_pushes (self);
+ }
+
+ gst_object_unref (self);
+
+ return self->flow_state;
+}
+
+static gboolean
+gst_signal_processor_sink_activate_push (GstPad * pad, gboolean active)
+{
+ gboolean result = TRUE;
+ GstSignalProcessor *self;
+ GstSignalProcessorClass *bclass;
+
+ self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad));
+ bclass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
+
+ if (active) {
+ if (self->mode == GST_ACTIVATE_NONE) {
+ self->mode = GST_ACTIVATE_PUSH;
+ result = TRUE;
+ } else if (self->mode == GST_ACTIVATE_PUSH) {
+ result = TRUE;
+ } else {
+ g_warning ("foo");
+ result = FALSE;
+ }
+ } else {
+ if (self->mode == GST_ACTIVATE_NONE) {
+ result = TRUE;
+ } else if (self->mode == GST_ACTIVATE_PUSH) {
+ self->mode = GST_ACTIVATE_NONE;
+ result = TRUE;
+ } else {
+ g_warning ("foo");
+ result = FALSE;
+ }
+ }
+
+ GST_DEBUG_OBJECT (self, "result : %d", result);
+
+ gst_object_unref (self);
+
+ return result;
+}
+
+static gboolean
+gst_signal_processor_src_activate_pull (GstPad * pad, gboolean active)
+{
+ gboolean result = TRUE;
+ GstSignalProcessor *self;
+ GstSignalProcessorClass *bclass;
+
+ self = GST_SIGNAL_PROCESSOR (gst_pad_get_parent (pad));
+ bclass = GST_SIGNAL_PROCESSOR_GET_CLASS (self);
+
+ if (active) {
+ if (self->mode == GST_ACTIVATE_NONE) {
+ GList *l;
+
+ for (l = GST_ELEMENT (self)->sinkpads; l; l = l->next)
+ result &= gst_pad_activate_pull (pad, active);
+ if (result)
+ self->mode = GST_ACTIVATE_PULL;
+ } else if (self->mode == GST_ACTIVATE_PULL) {
+ result = TRUE;
+ } else {
+ g_warning ("foo");
+ result = FALSE;
+ }
+ } else {
+ if (self->mode == GST_ACTIVATE_NONE) {
+ result = TRUE;
+ } else if (self->mode == GST_ACTIVATE_PULL) {
+ GList *l;
+
+ for (l = GST_ELEMENT (self)->sinkpads; l; l = l->next)
+ result &= gst_pad_activate_pull (pad, active);
+ if (result)
+ self->mode = GST_ACTIVATE_NONE;
+ result = TRUE;
+ } else {
+ g_warning ("foo");
+ result = FALSE;
+ }
+ }
+
+ GST_DEBUG_OBJECT (self, "result : %d", result);
+
+ gst_object_unref (self);
+
+ return result;
+}
+
+static GstStateChangeReturn
+gst_signal_processor_change_state (GstElement * element,
+ GstStateChange transition)
+{
+ GstSignalProcessor *self;
+ GstStateChangeReturn result;
+
+ self = GST_SIGNAL_PROCESSOR (element);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_NULL_TO_READY:
+ break;
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ self->flow_state = GST_FLOW_OK;
+ break;
+ case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
+ break;
+ default:
+ break;
+ }
+
+ if ((result =
+ GST_ELEMENT_CLASS (parent_class)->change_state (element,
+ transition)) == GST_STATE_CHANGE_FAILURE)
+ goto failure;
+
+ switch (transition) {
+ case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
+ break;
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ if (GST_SIGNAL_PROCESSOR_IS_RUNNING (self))
+ gst_signal_processor_stop (self);
+ gst_signal_processor_flush (self);
+ break;
+ case GST_STATE_CHANGE_READY_TO_NULL:
+ if (GST_SIGNAL_PROCESSOR_IS_INITIALIZED (self))
+ gst_signal_processor_cleanup (self);
+ break;
+ default:
+ break;
+ }
+
+ return result;
+
+ /* ERRORS */
+failure:
+ {
+ GST_DEBUG_OBJECT (element, "parent failed state change");
+ return result;
+ }
+}
diff --git a/gst-libs/gst/signalprocessor/gstsignalprocessor.h b/gst-libs/gst/signalprocessor/gstsignalprocessor.h
new file mode 100644
index 00000000..f9fac73f
--- /dev/null
+++ b/gst-libs/gst/signalprocessor/gstsignalprocessor.h
@@ -0,0 +1,124 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ * 2005 Wim Taymans <wim@fluendo.com>
+ *
+ * gstsignalprocessor.h:
+ *
+ * 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_SIGNAL_PROCESSOR_H__
+#define __GST_SIGNAL_PROCESSOR_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+
+typedef enum
+{
+ GST_SIGNAL_PROCESSOR_CLASS_FLAG_CAN_PROCESS_IN_PLACE = 1<<0
+} GstSignalProcessorClassFlags;
+
+#define GST_SIGNAL_PROCESSOR_CLASS_CAN_PROCESS_IN_PLACE(klass) \
+ (GST_SIGNAL_PROCESSOR_CLASS (klass)->flags & \
+ GST_SIGNAL_PROCESSOR_CLASS_FLAG_CAN_PROCESS_IN_PLACE)
+#define GST_SIGNAL_PROCESSOR_CLASS_SET_CAN_PROCESS_IN_PLACE(klass) \
+ GST_SIGNAL_PROCESSOR_CLASS (klass)->flags |= \
+ GST_SIGNAL_PROCESSOR_CLASS_FLAG_CAN_PROCESS_IN_PLACE
+
+typedef enum
+{
+ GST_SIGNAL_PROCESSOR_STATE_NULL,
+ GST_SIGNAL_PROCESSOR_STATE_INITIALIZED,
+ GST_SIGNAL_PROCESSOR_STATE_RUNNING
+} GstSignalProcessorState;
+
+
+#define GST_TYPE_SIGNAL_PROCESSOR (gst_signal_processor_get_type())
+#define GST_SIGNAL_PROCESSOR(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SIGNAL_PROCESSOR,GstSignalProcessor))
+#define GST_SIGNAL_PROCESSOR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SIGNAL_PROCESSOR,GstSignalProcessorClass))
+#define GST_SIGNAL_PROCESSOR_GET_CLASS(obj) \
+ (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_SIGNAL_PROCESSOR,GstSignalProcessorClass))
+#define GST_IS_SIGNAL_PROCESSOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SIGNAL_PROCESSOR))
+#define GST_IS_SIGNAL_PROCESSOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SIGNAL_PROCESSOR))
+
+#define GST_SIGNAL_PROCESSOR_IS_INITIALIZED(obj) \
+ (GST_SIGNAL_PROCESSOR (obj)->state >= GST_SIGNAL_PROCESSOR_STATE_INITIALIZED)
+#define GST_SIGNAL_PROCESSOR_IS_RUNNING(obj) \
+ (GST_SIGNAL_PROCESSOR (obj)->state == GST_SIGNAL_PROCESSOR_STATE_RUNNING)
+
+typedef struct _GstSignalProcessor GstSignalProcessor;
+typedef struct _GstSignalProcessorClass GstSignalProcessorClass;
+
+
+struct _GstSignalProcessor {
+ GstElement element;
+
+ GstCaps *caps;
+
+ guint sample_rate;
+
+ GstSignalProcessorState state;
+
+ GstFlowReturn flow_state;
+
+ GstActivateMode mode;
+
+ /* pending inputs before processing can take place */
+ guint pending_in;
+ /* panding outputs to be filled */
+ guint pending_out;
+
+ gfloat *control_in;
+ gfloat **audio_in;
+ gfloat *control_out;
+ gfloat **audio_out;
+};
+
+struct _GstSignalProcessorClass {
+ GstElementClass parent_class;
+
+ /*< public >*/
+ guint num_control_in;
+ guint num_audio_in;
+ guint num_control_out;
+ guint num_audio_out;
+
+ guint flags;
+
+ /* virtual methods for subclasses */
+
+ gboolean (*setup) (GstSignalProcessor *self, guint sample_rate);
+ gboolean (*start) (GstSignalProcessor *self);
+ void (*stop) (GstSignalProcessor *self);
+ void (*cleanup) (GstSignalProcessor *self);
+ void (*process) (GstSignalProcessor *self, guint num_frames);
+ gboolean (*event) (GstSignalProcessor *self, GstEvent *event);
+};
+
+
+GType gst_signal_processor_get_type (void);
+void gst_signal_processor_class_add_pad_template (GstSignalProcessorClass *klass,
+ const gchar *name, GstPadDirection direction, guint index);
+
+
+
+G_END_DECLS
+
+
+#endif /* __GST_SIGNAL_PROCESSOR_H__ */