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New elements interleave and deinterleave, implement channel interleaving and deinterleaving.

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Original commit message from CVS:
2007-01-07  Andy Wingo  <wingo@pobox.com>

* configure.ac:
* gst/interleave/Makefile.am:
* gst/interleave/plugin.h:
* gst/interleave/plugin.c:
* gst/interleave/interleave.c:
* gst/interleave/deinterleave.c: New elements interleave and
deinterleave, implement channel interleaving and deinterleaving.
The interleaver can operate in pull or push mode but the
deinterleaver is more like a demuxer and can only operate in push
mode.
This commit is contained in:
Andy Wingo 2007-01-07 22:03:54 +00:00
parent 8d2ac1002c
commit 12359919d3
5 changed files with 1035 additions and 0 deletions
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9
gst/interleave/Makefile.am Normal file
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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

337
gst/interleave/deinterleave.c Normal file
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/* 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;
}

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gst/interleave/interleave.c Normal file
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@ -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;
}

44
gst/interleave/plugin.c Normal file
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@ -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);

36
gst/interleave/plugin.h Normal file
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@ -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__ */