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-rw-r--r--gst/interleave/Makefile.am9
-rw-r--r--gst/interleave/deinterleave.c337
-rw-r--r--gst/interleave/interleave.c609
-rw-r--r--gst/interleave/plugin.c44
-rw-r--r--gst/interleave/plugin.h36
5 files changed, 1035 insertions, 0 deletions
diff --git a/gst/interleave/Makefile.am b/gst/interleave/Makefile.am
new file mode 100644
index 00000000..9a09cdbc
--- /dev/null
+++ b/gst/interleave/Makefile.am
@@ -0,0 +1,9 @@
+
+plugin_LTLIBRARIES = libgstinterleave.la
+
+libgstinterleave_la_SOURCES = plugin.c interleave.c deinterleave.c
+libgstinterleave_la_CFLAGS = $(GST_CFLAGS)
+libgstinterleave_la_LIBADD = $(GST_LIBS)
+libgstinterleave_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+
+noinst_HEADERS = plugin.h
diff --git a/gst/interleave/deinterleave.c b/gst/interleave/deinterleave.c
new file mode 100644
index 00000000..09f19e15
--- /dev/null
+++ b/gst/interleave/deinterleave.c
@@ -0,0 +1,337 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ * 2000 Wim Taymans <wtay@chello.be>
+ * 2005 Wim Taymans <wim@fluendo.com>
+ * 2007 Andy Wingo <wingo at pobox.com>
+ *
+ * deinterleave.c: deinterleave samples, based on interleave.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.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <gst/gst.h>
+
+
+#define GST_TYPE_DEINTERLEAVE (gst_deinterleave_get_type())
+#define GST_DEINTERLEAVE(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DEINTERLEAVE,GstDeinterleave))
+#define GST_DEINTERLEAVE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DEINTERLEAVE,GstDeinterleaveClass))
+#define GST_DEINTERLEAVE_GET_CLASS(obj) \
+ (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_DEINTERLEAVE,GstDeinterleaveClass))
+#define GST_IS_DEINTERLEAVE(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DEINTERLEAVE))
+#define GST_IS_DEINTERLEAVE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DEINTERLEAVE))
+
+typedef struct _GstDeinterleave GstDeinterleave;
+typedef struct _GstDeinterleaveClass GstDeinterleaveClass;
+
+
+struct _GstDeinterleave
+{
+ GstElement element;
+
+ GstCaps *sinkcaps;
+ gint channels;
+
+ GstPad *sink;
+};
+
+struct _GstDeinterleaveClass
+{
+ GstElementClass parent_class;
+};
+
+
+GST_DEBUG_CATEGORY_STATIC (gst_deinterleave_debug);
+#define GST_CAT_DEFAULT gst_deinterleave_debug
+
+
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src%d",
+ GST_PAD_SRC,
+ GST_PAD_SOMETIMES,
+ GST_STATIC_CAPS ("audio/x-raw-float, "
+ "rate = (int) [ 1, MAX ], "
+ "channels = (int) 1, "
+ "endianness = (int) BYTE_ORDER, " "width = (int) 32")
+ );
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ 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")
+ );
+
+
+GST_BOILERPLATE (GstDeinterleave, gst_deinterleave, GstElement,
+ GST_TYPE_ELEMENT);
+
+
+static GstFlowReturn gst_deinterleave_chain (GstPad * pad, GstBuffer * buffer);
+static gboolean gst_deinterleave_sink_setcaps (GstPad * pad, GstCaps * caps);
+static gboolean gst_deinterleave_sink_activate_push (GstPad * pad,
+ gboolean active);
+
+
+static const GstElementDetails details =
+GST_ELEMENT_DETAILS ("Audio deinterleaver",
+ "Filter/Converter/Audio",
+ "Splits one interleaved multichannel audio stream into many mono audio streams",
+ "Andy Wingo <wingo at pobox.com>, " "Iain <iain@prettypeople.org>");
+
+static void
+gst_deinterleave_base_init (gpointer g_class)
+{
+ GST_DEBUG_CATEGORY_INIT (gst_deinterleave_debug, "interleave", 0,
+ "interleave element");
+
+ gst_element_class_set_details (g_class, &details);
+
+ gst_element_class_add_pad_template (g_class,
+ gst_static_pad_template_get (&sink_template));
+ gst_element_class_add_pad_template (g_class,
+ gst_static_pad_template_get (&src_template));
+}
+
+static void
+gst_deinterleave_class_init (GstDeinterleaveClass * klass)
+{
+ /* pass */
+}
+
+static void
+gst_deinterleave_init (GstDeinterleave * self, GstDeinterleaveClass * klass)
+{
+ self->sink = gst_pad_new_from_static_template (&sink_template, "sink");
+
+ gst_pad_set_chain_function (self->sink,
+ GST_DEBUG_FUNCPTR (gst_deinterleave_chain));
+ gst_pad_set_setcaps_function (self->sink,
+ GST_DEBUG_FUNCPTR (gst_deinterleave_sink_setcaps));
+ gst_pad_set_activatepush_function (self->sink,
+ GST_DEBUG_FUNCPTR (gst_deinterleave_sink_activate_push));
+
+ gst_element_add_pad (GST_ELEMENT (self), self->sink);
+}
+
+static void
+gst_deinterleave_add_new_pads (GstDeinterleave * self, GstCaps * caps)
+{
+ GstPad *pad;
+ guint i;
+
+ for (i = 0; i < self->channels; i++) {
+ gchar *name = g_strdup_printf ("src%d", i);
+
+ pad = gst_pad_new_from_static_template (&src_template, name);
+ g_free (name);
+ gst_pad_set_caps (pad, caps);
+ GST_PAD_UNSET_FLUSHING (pad);
+ gst_element_add_pad (GST_ELEMENT (self), pad);
+ }
+
+ gst_element_no_more_pads (GST_ELEMENT (self));
+}
+
+static void
+gst_deinterleave_remove_pads (GstDeinterleave * self)
+{
+ GstElement *elem;
+ GList *sinks, *l;
+
+ elem = GST_ELEMENT (self);
+
+ GST_INFO_OBJECT (self, "remove_pads()");
+
+ sinks = g_list_copy (elem->sinkpads);
+
+ for (l = sinks; l; l = l->next)
+ /* force set_caps when going to RUNNING, see note in set_caps */
+ gst_element_remove_pad (elem, GST_PAD (l->data));
+
+ gst_pad_set_caps (self->sink, NULL);
+ gst_caps_replace (&self->sinkcaps, NULL);
+
+ g_list_free (sinks);
+}
+
+static gboolean
+gst_deinterleave_sink_setcaps (GstPad * pad, GstCaps * caps)
+{
+ GstDeinterleave *self;
+
+ self = GST_DEINTERLEAVE (gst_pad_get_parent (pad));
+
+ if (self->sinkcaps && !gst_caps_is_equal (caps, self->sinkcaps)) {
+ goto cannot_change_caps_dog;
+ } else {
+ GST_DEBUG_OBJECT (self, "got caps: %" GST_PTR_FORMAT, caps);
+ gst_caps_replace (&self->sinkcaps, caps);
+ }
+
+ {
+ GstCaps *srccaps;
+ GstStructure *s;
+
+ srccaps = gst_caps_copy (caps);
+ s = gst_caps_get_structure (srccaps, 0);
+ if (!gst_structure_get_int (s, "channels", &self->channels))
+ goto no_channels;
+ gst_structure_set (s, "channels", G_TYPE_INT, 1, NULL);
+ gst_deinterleave_add_new_pads (self, srccaps);
+ gst_caps_unref (srccaps);
+ }
+
+ gst_object_unref (self);
+
+ return TRUE;
+
+cannot_change_caps_dog:
+ {
+ gst_object_unref (self);
+ return FALSE;
+ }
+no_channels:
+ {
+ g_warning ("yarr, shiver me timbers");
+ gst_object_unref (self);
+ return FALSE;
+ }
+}
+
+static GstFlowReturn
+gst_deinterleave_process (GstDeinterleave * self, GstBuffer * buf)
+{
+ GstFlowReturn ret;
+ GstElement *elem;
+ GList *srcs;
+ guint bufsize, i, j, channels, pads_pushed, nframes;
+ GstBuffer **buffers_out;
+ gfloat *in, *out;
+
+ elem = GST_ELEMENT (self);
+
+ channels = self->channels;
+ buffers_out = g_alloca (sizeof (GstBuffer *) * channels);
+ nframes = GST_BUFFER_SIZE (buf) / channels / sizeof (gfloat);
+ bufsize = nframes * sizeof (gfloat);
+ pads_pushed = 0;
+
+ for (i = 0; i < channels; i++)
+ buffers_out[i] = NULL;
+
+ for (srcs = elem->srcpads, i = 0; srcs; srcs = srcs->next, i++) {
+ GstPad *pad = (GstPad *) srcs->data;
+
+ buffers_out[i] = NULL;
+ ret = gst_pad_alloc_buffer (pad, -1, bufsize, GST_PAD_CAPS (pad),
+ &buffers_out[i]);
+
+ if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)
+ goto alloc_buffer_failed;
+ if (buffers_out[i] && GST_BUFFER_SIZE (buffers_out[i]) != bufsize)
+ goto alloc_buffer_bad_size;
+ }
+
+ /* do the thing */
+ for (srcs = elem->srcpads, i = 0; srcs; srcs = srcs->next, i++) {
+ GstPad *pad = (GstPad *) srcs->data;
+
+ in = (gfloat *) GST_BUFFER_DATA (buf);
+ in += i; /* gfloat * arith */
+ if (buffers_out[i]) {
+ out = (gfloat *) GST_BUFFER_DATA (buffers_out[i]);
+ for (j = 0; j < nframes; j++)
+ out[j] = in[j * channels];
+
+ ret = gst_pad_push (pad, buffers_out[i]);
+ buffers_out[i] = NULL;
+ if (ret == GST_FLOW_OK)
+ pads_pushed++;
+ else if (ret == GST_FLOW_NOT_LINKED)
+ ret = GST_FLOW_OK;
+ else
+ goto push_failed;
+ }
+ }
+
+ if (!pads_pushed)
+ ret = GST_FLOW_NOT_LINKED;
+
+ return ret;
+
+alloc_buffer_failed:
+ {
+ GST_WARNING ("gst_pad_alloc_buffer() returned %d", ret);
+ goto clean_buffers;
+
+ }
+alloc_buffer_bad_size:
+ {
+ GST_WARNING ("called alloc_buffer(), but didn't get requested bytes");
+ ret = GST_FLOW_NOT_NEGOTIATED;
+ goto clean_buffers;
+ }
+push_failed:
+ {
+ GST_DEBUG ("push() failed");
+ goto clean_buffers;
+ }
+clean_buffers:
+ {
+ for (i = 0; i < channels; i++)
+ if (buffers_out[i])
+ gst_buffer_unref (buffers_out[i]);
+ return ret;
+ }
+}
+
+static GstFlowReturn
+gst_deinterleave_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstDeinterleave *self;
+ GstFlowReturn ret;
+
+ self = GST_DEINTERLEAVE (gst_pad_get_parent (pad));
+
+ ret = gst_deinterleave_process (self, buffer);
+
+ if (ret != GST_FLOW_OK)
+ GST_WARNING_OBJECT (self, "process failed");
+
+ gst_object_unref (self);
+
+ return ret;
+}
+
+static gboolean
+gst_deinterleave_sink_activate_push (GstPad * pad, gboolean active)
+{
+ GstDeinterleave *self;
+
+ self = GST_DEINTERLEAVE (gst_pad_get_parent (pad));
+
+ if (!active)
+ gst_deinterleave_remove_pads (self);
+
+ gst_object_unref (self);
+
+ return TRUE;
+}
diff --git a/gst/interleave/interleave.c b/gst/interleave/interleave.c
new file mode 100644
index 00000000..51b75a9e
--- /dev/null
+++ b/gst/interleave/interleave.c
@@ -0,0 +1,609 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ * 2000 Wim Taymans <wtay@chello.be>
+ * 2005 Wim Taymans <wim@fluendo.com>
+ * 2007 Andy Wingo <wingo at pobox.com>
+ *
+ * interleave.c: interleave samples, based on 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.
+ */
+
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <gst/gst.h>
+
+
+#define GST_TYPE_INTERLEAVE (gst_interleave_get_type())
+#define GST_INTERLEAVE(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_INTERLEAVE,GstInterleave))
+#define GST_INTERLEAVE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_INTERLEAVE,GstInterleaveClass))
+#define GST_INTERLEAVE_GET_CLASS(obj) \
+ (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_INTERLEAVE,GstInterleaveClass))
+#define GST_IS_INTERLEAVE(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_INTERLEAVE))
+#define GST_IS_INTERLEAVE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_INTERLEAVE))
+
+
+typedef struct _GstInterleave GstInterleave;
+typedef struct _GstInterleaveClass GstInterleaveClass;
+
+
+struct _GstInterleave
+{
+ GstElement element;
+
+ GstCaps *sinkcaps;
+ guint channels;
+
+ GstPad *src;
+
+ GstActivateMode mode;
+
+ guint pending_in;
+};
+
+struct _GstInterleaveClass
+{
+ GstElementClass parent_class;
+};
+
+
+GST_DEBUG_CATEGORY_STATIC (gst_interleave_debug);
+#define GST_CAT_DEFAULT gst_interleave_debug
+
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink%d",
+ GST_PAD_SINK,
+ GST_PAD_REQUEST,
+ GST_STATIC_CAPS ("audio/x-raw-float, "
+ "rate = (int) [ 1, MAX ], "
+ "channels = (int) 1, "
+ "endianness = (int) BYTE_ORDER, " "width = (int) 32")
+ );
+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")
+ );
+
+
+#define GST_TYPE_INTERLEAVE_PAD (gst_interleave_pad_get_type ())
+#define GST_INTERLEAVE_PAD(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_INTERLEAVE_PAD,\
+ GstInterleavePad))
+typedef struct _GstInterleavePad GstInterleavePad;
+typedef GstPadClass GstInterleavePadClass;
+
+struct _GstInterleavePad
+{
+ GstPad parent;
+
+ GstBuffer *pen;
+
+ guint channel;
+
+ /* these are only used for sink pads */
+ guint samples_avail;
+ gfloat *data;
+};
+
+static GType
+gst_interleave_pad_get_type (void)
+{
+ static GType type = 0;
+
+ if (!type) {
+ static const GTypeInfo info = {
+ sizeof (GstInterleavePadClass), NULL, NULL, NULL, NULL,
+ NULL, sizeof (GstInterleavePad), 0, NULL
+ };
+
+ type = g_type_register_static (GST_TYPE_PAD, "GstInterleavePad", &info, 0);
+ }
+ return type;
+}
+
+
+GST_BOILERPLATE (GstInterleave, gst_interleave, GstElement, GST_TYPE_ELEMENT);
+
+
+static gboolean gst_interleave_src_activate_pull (GstPad * pad,
+ gboolean active);
+static gboolean gst_interleave_sink_activate_push (GstPad * pad,
+ gboolean active);
+static GstPad *gst_interleave_request_new_pad (GstElement * element,
+ GstPadTemplate * templ, const gchar * name);
+
+static GstFlowReturn gst_interleave_getrange (GstPad * pad,
+ guint64 offset, guint length, GstBuffer ** buffer);
+static GstFlowReturn gst_interleave_chain (GstPad * pad, GstBuffer * buffer);
+static gboolean gst_interleave_setcaps (GstPad * pad, GstCaps * caps);
+
+
+static const GstElementDetails details =
+GST_ELEMENT_DETAILS ("Audio interleaver",
+ "Filter/Converter/Audio",
+ "Folds many mono channels into one interleaved audio stream",
+ "Andy Wingo <wingo at pobox.com>");
+
+static void
+gst_interleave_base_init (gpointer g_class)
+{
+ GST_DEBUG_CATEGORY_INIT (gst_interleave_debug, "interleave", 0,
+ "interleave element");
+
+ gst_element_class_set_details (g_class, &details);
+
+ gst_element_class_add_pad_template (g_class,
+ gst_static_pad_template_get (&sink_template));
+ gst_element_class_add_pad_template (g_class,
+ gst_static_pad_template_get (&src_template));
+}
+
+static void
+gst_interleave_class_init (GstInterleaveClass * klass)
+{
+ GstElementClass *gstelement_class;
+
+ gstelement_class = GST_ELEMENT_CLASS (klass);
+
+ gstelement_class->request_new_pad =
+ GST_DEBUG_FUNCPTR (gst_interleave_request_new_pad);
+}
+
+static void
+gst_interleave_init (GstInterleave * self, GstInterleaveClass * klass)
+{
+ self->pending_in = 0;
+
+ self->src = gst_pad_new_from_static_template (&src_template, "src");
+
+ gst_pad_set_getrange_function (self->src,
+ GST_DEBUG_FUNCPTR (gst_interleave_getrange));
+ gst_pad_set_activatepull_function (self->src,
+ GST_DEBUG_FUNCPTR (gst_interleave_src_activate_pull));
+
+ gst_element_add_pad (GST_ELEMENT (self), self->src);
+}
+
+static GstPad *
+gst_interleave_request_new_pad (GstElement * element, GstPadTemplate * templ,
+ const gchar * name)
+{
+ GstPad *new;
+ GstInterleave *self = GST_INTERLEAVE (element);
+
+ new = g_object_new (GST_TYPE_INTERLEAVE_PAD,
+ "name", GST_OBJECT_NAME (templ), "direction", templ->direction,
+ "template", templ, NULL);
+ GST_INTERLEAVE_PAD (new)->channel = self->channels++;
+
+ gst_pad_set_setcaps_function (new,
+ GST_DEBUG_FUNCPTR (gst_interleave_setcaps));
+
+ gst_pad_set_chain_function (new, GST_DEBUG_FUNCPTR (gst_interleave_chain));
+ gst_pad_set_activatepush_function (new,
+ GST_DEBUG_FUNCPTR (gst_interleave_sink_activate_push));
+
+ self->pending_in++;
+
+ GST_PAD_UNSET_FLUSHING (new);
+ gst_element_add_pad (element, new);
+
+ return new;
+}
+
+static void
+gst_interleave_unset_caps (GstInterleave * self)
+{
+ GstElement *elem;
+ GList *sinks;
+
+ elem = GST_ELEMENT (self);
+
+ GST_INFO_OBJECT (self, "unset_caps()");
+
+ for (sinks = elem->sinkpads; sinks; sinks = sinks->next)
+ gst_pad_set_caps (GST_PAD (sinks->data), NULL);
+}
+
+static gboolean
+gst_interleave_setcaps (GstPad * pad, GstCaps * caps)
+{
+ GstInterleave *self;
+
+ self = GST_INTERLEAVE (gst_pad_get_parent (pad));
+
+ if (self->sinkcaps && !gst_caps_is_equal (caps, self->sinkcaps)) {
+ goto cannot_change_caps_dog;
+ } else {
+ GST_DEBUG_OBJECT (self, "got caps: %" GST_PTR_FORMAT, caps);
+ gst_caps_replace (&self->sinkcaps, caps);
+ }
+
+ {
+ GstCaps *srccaps;
+ GstStructure *s;
+
+ srccaps = gst_caps_copy (caps);
+ s = gst_caps_get_structure (srccaps, 0);
+ gst_structure_set (s, "channels", G_TYPE_INT, self->channels, NULL);
+ gst_pad_set_caps (self->src, srccaps);
+ gst_caps_unref (srccaps);
+ }
+
+ gst_object_unref (self);
+
+ return TRUE;
+
+cannot_change_caps_dog:
+ {
+ gst_object_unref (self);
+ return FALSE;
+ }
+}
+
+static void
+gst_interleave_update_inputs (GstInterleave * self, guint nprocessed)
+{
+ GstElement *elem = (GstElement *) self;
+ GList *sinks;
+
+ for (sinks = elem->sinkpads; sinks; sinks = sinks->next) {
+ GstInterleavePad *sinkpad;
+
+ sinkpad = (GstInterleavePad *) 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 GstFlowReturn
+gst_interleave_process (GstInterleave * self, guint nframes, GstBuffer ** buf)
+{
+ GstFlowReturn ret;
+ GstElement *elem;
+ GList *sinks;
+ guint bufsize, i, j, channels;
+ gfloat *in, *out;
+
+ g_return_val_if_fail (self->pending_in == 0, GST_FLOW_ERROR);
+
+ elem = GST_ELEMENT (self);
+
+ /* determine the number of samples that we can process */
+ for (sinks = elem->sinkpads; sinks; sinks = sinks->next) {
+ GstInterleavePad *sinkpad = (GstInterleavePad *) sinks->data;
+
+ g_assert (sinkpad->samples_avail > 0);
+ nframes = MIN (nframes, sinkpad->samples_avail);
+ }
+
+ channels = self->channels;
+ bufsize = nframes * channels * sizeof (gfloat);
+
+ ret = gst_pad_alloc_buffer (GST_PAD (self->src), -1,
+ bufsize, GST_PAD_CAPS (self->src), buf);
+
+ if (ret != GST_FLOW_OK)
+ goto alloc_buffer_failed;
+
+ if (GST_BUFFER_SIZE (*buf) != bufsize)
+ goto alloc_buffer_bad_size;
+
+ /* do the thing */
+ for (sinks = elem->sinkpads, i = 0; sinks; sinks = sinks->next, i++) {
+ GstInterleavePad *sinkpad = (GstInterleavePad *) sinks->data;
+
+ out = (gfloat *) GST_BUFFER_DATA (*buf);
+ out += i; /* gfloat* arith */
+ in = sinkpad->data;
+ for (j = 0; j < nframes; j++)
+ out[j * channels] = in[j];
+ }
+
+ gst_interleave_update_inputs (self, nframes);
+
+ return ret;
+
+alloc_buffer_failed:
+ {
+ GST_WARNING ("gst_pad_alloc_buffer() returned %d", ret);
+ return ret;
+ }
+alloc_buffer_bad_size:
+ {
+ GST_WARNING ("called alloc_buffer() for %d bytes but got %d", bufsize,
+ GST_BUFFER_SIZE (*buf));
+ gst_buffer_unref (*buf);
+ return GST_FLOW_NOT_NEGOTIATED;
+ }
+}
+
+static GstFlowReturn
+gst_interleave_pen_buffer (GstInterleave * self, GstPad * pad,
+ GstBuffer * buffer)
+{
+ GstInterleavePad *spad = (GstInterleavePad *) 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 GST_FLOW_OK;
+
+ /* ERRORS */
+had_buffer:
+ {
+ GST_WARNING ("Pad %s:%s already has penned buffer",
+ GST_DEBUG_PAD_NAME (pad));
+ gst_buffer_unref (buffer);
+ return GST_FLOW_ERROR;
+ }
+}
+
+static void
+gst_interleave_flush (GstInterleave * self)
+{
+ GList *pads;
+
+ GST_INFO_OBJECT (self, "flush()");
+
+ for (pads = GST_ELEMENT (self)->sinkpads; pads; pads = pads->next) {
+ GstInterleavePad *spad = (GstInterleavePad *) pads->data;
+
+ if (spad->pen) {
+ gst_buffer_unref (spad->pen);
+ spad->pen = NULL;
+ spad->data = NULL;
+ spad->samples_avail = 0;
+ }
+ }
+
+ self->pending_in = GST_ELEMENT (self)->numsinkpads;
+}
+
+static GstFlowReturn
+gst_interleave_do_pulls (GstInterleave * self, guint nframes)
+{
+ GList *sinkpads;
+ GstFlowReturn ret = GST_FLOW_OK;
+
+ /* FIXME: not threadsafe atm */
+
+ sinkpads = GST_ELEMENT (self)->sinkpads;
+
+ for (; sinkpads; sinkpads = sinkpads->next) {
+ GstInterleavePad *spad = (GstInterleavePad *) sinkpads->data;
+ 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)
+ goto pull_failed;
+
+ if (!buf)
+ goto no_buffer;
+
+ ret = gst_interleave_pen_buffer (self, GST_PAD (spad), buf);
+ if (ret != GST_FLOW_OK)
+ goto pull_failed;
+ }
+
+ return ret;
+
+pull_failed:
+ {
+ gst_interleave_flush (self);
+ return ret;
+ }
+no_buffer:
+ {
+ g_critical ("Pull failed to make a buffer!");
+ return GST_FLOW_ERROR;
+ }
+}
+
+static GstFlowReturn
+gst_interleave_getrange (GstPad * pad, guint64 offset,
+ guint length, GstBuffer ** buffer)
+{
+ GstInterleave *self;
+ GstFlowReturn ret = GST_FLOW_ERROR;
+ guint nframes;
+
+ self = GST_INTERLEAVE (gst_pad_get_parent (pad));
+
+ nframes = length / self->channels / sizeof (gfloat);
+
+ ret = gst_interleave_do_pulls (self, nframes);
+
+ if (ret == GST_FLOW_OK)
+ ret = gst_interleave_process (self, nframes, buffer);
+
+ GST_DEBUG_OBJECT (self, "returns %s", gst_flow_get_name (ret));
+
+ gst_object_unref (self);
+
+ return ret;
+}
+
+static GstFlowReturn
+gst_interleave_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstFlowReturn ret;
+ GstInterleave *self;
+
+ self = GST_INTERLEAVE (gst_pad_get_parent (pad));
+
+ ret = gst_interleave_pen_buffer (self, pad, buffer);
+ if (ret != GST_FLOW_OK)
+ goto pen_failed;
+
+ if (self->pending_in == 0) {
+ GstBuffer *out;
+
+ ret = gst_interleave_process (self, G_MAXUINT, &out);
+ if (ret != GST_FLOW_OK)
+ goto process_failed;
+
+ ret = gst_pad_push (self->src, out);
+ }
+
+done:
+ gst_object_unref (self);
+ return ret;
+
+pen_failed:
+ {
+ GST_WARNING_OBJECT (self, "pen failed");
+ goto done;
+ }
+process_failed:
+ {
+ GST_WARNING_OBJECT (self, "process failed");
+ goto done;
+ }
+}
+
+static gboolean
+gst_interleave_sink_activate_push (GstPad * pad, gboolean active)
+{
+ gboolean result = TRUE;
+ GstInterleave *self;
+
+ self = GST_INTERLEAVE (gst_pad_get_parent (pad));
+
+ 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_interleave_src_activate_pull (GstPad * pad, gboolean active)
+{
+ gboolean result = TRUE;
+ GstInterleave *self;
+
+ self = GST_INTERLEAVE (gst_pad_get_parent (pad));
+
+ if (active) {
+ if (self->mode == GST_ACTIVATE_NONE) {
+ GList *l;
+
+ if (GST_ELEMENT (self)->sinkpads) {
+ for (l = GST_ELEMENT (self)->sinkpads; l; l = l->next)
+ result &= gst_pad_activate_pull (pad, active);
+ } else {
+ /* nobody has requested pads, seems i am operating in delayed-request
+ push mode */
+ result = FALSE;
+ }
+ 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_interleave_unset_caps (self);
+ gst_interleave_flush (self);
+ }
+
+ GST_DEBUG_OBJECT (self, "result : %d", result);
+
+ gst_object_unref (self);
+
+ return result;
+}
diff --git a/gst/interleave/plugin.c b/gst/interleave/plugin.c
new file mode 100644
index 00000000..7017c45c
--- /dev/null
+++ b/gst/interleave/plugin.c
@@ -0,0 +1,44 @@
+/* GStreamer interleave plugin
+ * Copyright (C) 2004,2007 Andy Wingo <wingo at pobox.com>
+ *
+ * plugin.c: the stubs for the interleave plugin
+ *
+ * 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 "plugin.h"
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ if (!gst_element_register (plugin, "interleave",
+ GST_RANK_NONE, gst_interleave_get_type ()) ||
+ !gst_element_register (plugin, "deinterleave",
+ GST_RANK_NONE, gst_deinterleave_get_type ()))
+ return FALSE;
+
+ return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "interleave",
+ "Audio interleaver/deinterleaver",
+ plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
diff --git a/gst/interleave/plugin.h b/gst/interleave/plugin.h
new file mode 100644
index 00000000..bc722bdb
--- /dev/null
+++ b/gst/interleave/plugin.h
@@ -0,0 +1,36 @@
+/* GStreamer interleave plugin
+ * Copyright (C) 2004,2007 Andy Wingo <wingo at pobox.com>
+ *
+ * plugin.h: the stubs for the interleave plugin
+ *
+ * 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_PLUGIN_INTERLEAVE_H__
+#define __GST_PLUGIN_INTERLEAVE_H__
+
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+GType gst_interleave_get_type (void);
+GType gst_deinterleave_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_PLUGIN_INTERLEAVE_H__ */
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-28 16:08:28 +0000