gstreamer/gst/mixmatrix/mixmatrix.c
2012-11-04 00:09:59 +00:00

533 lines
14 KiB
C

/* GStreamer
* Copyright (C) 2002 Wim Taymans <wtay@chello.be>
*
* 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 <gst/gst.h>
#include <gst/bytestream/bytestream.h>
#include <gst/audio/audio.h>
#include <string.h>
#define GST_TYPE_MIXMATRIX \
(gst_mixmatrix_get_type())
#define GST_MIXMATRIX(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MIXMATRIX,GstMixMatrix))
#define GST_MIXMATRIX_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MIXMATRIX,GstMixMatrix))
#define GST_IS_MIXMATRIX(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MIXMATRIX))
#define GST_IS_MIXMATRIX_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MIXMATRIX))
typedef struct _GstMixMatrix GstMixMatrix;
typedef struct _GstMixMatrixClass GstMixMatrixClass;
struct _GstMixMatrix
{
GstElement element;
GstCaps *caps;
gint samplerate;
gint grpsize;
gint outsize;
GstPad **sinkpads;
GstByteStream **sinkbs;
gint sinkpadalloc;
GstPad **srcpads;
gint srcpadalloc;
gfloat **matrix;
};
struct _GstMixMatrixClass
{
GstElementClass parent_class;
void (*resize) (GstMixMatrix * mix);
};
enum
{
/* FILL ME */
RESIZE_SIGNAL,
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_GRPSIZE,
ARG_OUTSIZE,
ARG_SINKPADS,
ARG_SRCPADS,
ARG_MATRIXPTR
};
static GstStaticPadTemplate mixmatrix_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS (GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS)
);
static GstStaticPadTemplate mixmatrix_src_template =
GST_STATIC_PAD_TEMPLATE ("src_%u",
GST_PAD_SRC,
GST_PAD_REQUEST,
GST_STATIC_CAPS (GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS)
);
static void gst_mixmatrix_class_init (GstMixMatrixClass * klass);
static void gst_mixmatrix_base_init (GstMixMatrixClass * klass);
static void gst_mixmatrix_init (GstMixMatrix * element);
static void gst_mixmatrix_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_mixmatrix_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstPad *gst_mixmatrix_request_new_pad (GstElement * element,
GstPadTemplate * temp, const gchar * name);
static GstPadLinkReturn gst_mixmatrix_connect (GstPad * pad,
const GstCaps * caps);
static void gst_mixmatrix_loop (GstElement * element);
static guint gst_mixmatrix_signals[LAST_SIGNAL] = { 0 };
static GstElementClass *parent_class = NULL;
GType
gst_mixmatrix_get_type (void)
{
static GType mixmatrix_type = 0;
if (!mixmatrix_type) {
static const GTypeInfo mixmatrix_info = {
sizeof (GstMixMatrixClass),
(GBaseInitFunc) gst_mixmatrix_base_init,
NULL,
(GClassInitFunc) gst_mixmatrix_class_init,
NULL,
NULL,
sizeof (GstMixMatrix),
0,
(GInstanceInitFunc) gst_mixmatrix_init,
};
mixmatrix_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstMixMatrix",
&mixmatrix_info, 0);
}
return mixmatrix_type;
}
static void
gst_mixmatrix_base_init (GstMixMatrixClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&mixmatrix_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&mixmatrix_src_template));
gst_element_class_set_static_metadata (element_class, "Mixing Matrix",
"Filter/Editor/Audio",
"Mix N audio channels together into M channels",
"Erik Walthinsen <omega@temple-baptist.com>");
}
static void
gst_mixmatrix_class_init (GstMixMatrixClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gst_mixmatrix_signals[RESIZE_SIGNAL] =
g_signal_new ("resize",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstMixMatrixClass, resize),
NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SINKPADS,
g_param_spec_int ("sinkpads", "Sink Pads",
"Number of sink pads in matrix", 0, G_MAXINT, 8,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SRCPADS,
g_param_spec_int ("srcpads", "Src Pads", "Number of src pads in matrix",
0, G_MAXINT, 8, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MATRIXPTR,
g_param_spec_pointer ("matrixptr", "Matrix Pointer",
"Pointer to gfloat mix matrix",
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
gobject_class->set_property = gst_mixmatrix_set_property;
gobject_class->get_property = gst_mixmatrix_get_property;
gstelement_class->request_new_pad = gst_mixmatrix_request_new_pad;
}
static gfloat **
mixmatrix_alloc_matrix (int x, int y)
{
gfloat **matrix;
int i;
GST_DEBUG ("mixmatrix: allocating a %dx%d matrix of floats\n", x, y);
matrix = g_new (gfloat *, x);
GST_DEBUG ("mixmatrix: %p: ", matrix);
for (i = 0; i < x; i++) {
matrix[i] = g_new (gfloat, y);
GST_DEBUG ("%p, ", matrix[i]);
}
GST_DEBUG ("\n");
return matrix;
}
static void
mixmatrix_free_matrix (gfloat ** matrix, int x)
{
int i;
for (i = 0; i < x; i++)
g_free (matrix[i]);
g_free (matrix);
}
static void
gst_mixmatrix_init (GstMixMatrix * mix)
{
mix->grpsize = 8;
mix->outsize = 1024;
/* start with zero pads */
mix->sinkpadalloc = mix->grpsize;
mix->srcpadalloc = mix->grpsize;
/* allocate the pads */
mix->sinkpads = g_new0 (GstPad *, mix->sinkpadalloc);
mix->sinkbs = g_new0 (GstByteStream *, mix->sinkpadalloc);
mix->srcpads = g_new0 (GstPad *, mix->srcpadalloc);
/* allocate a similarly sized matrix */
mix->matrix = mixmatrix_alloc_matrix (mix->sinkpadalloc, mix->srcpadalloc);
/* set the loop function that does all the work */
gst_element_set_loop_function (GST_ELEMENT (mix), gst_mixmatrix_loop);
}
#define ROUND_UP(val,bound) ((((val)/bound)+1)*bound)
static void **
grow_ptrlist (void **origlist, int origsize, int newsize)
{
void **newlist = g_new (void *, newsize);
memcpy (newlist, origlist, sizeof (void *) * origsize);
g_free (origlist);
return newlist;
}
void
mixmatrix_resize (GstMixMatrix * mix, int sinkpads, int srcpads)
{
int sinkresize = (sinkpads != mix->sinkpadalloc);
int srcresize = (srcpads != mix->srcpadalloc);
gfloat **newmatrix;
int i;
GST_DEBUG ("mixmatrix: resizing matrix!!!!\n");
/* check the sinkpads list */
if (sinkresize) {
mix->sinkpads =
(GstPad **) grow_ptrlist ((void **) mix->sinkpads, mix->sinkpadalloc,
sinkpads);
mix->sinkbs =
(GstByteStream **) grow_ptrlist ((void **) mix->sinkbs,
mix->sinkpadalloc, sinkpads);
}
/* check the srcpads list */
if (srcresize) {
mix->srcpads =
(GstPad **) grow_ptrlist ((void **) mix->srcpads, mix->srcpadalloc,
srcpads);
}
/* now resize the matrix if either has changed */
if (sinkresize || srcresize) {
/* allocate the new matrix */
newmatrix = mixmatrix_alloc_matrix (sinkpads, srcpads);
/* if only the srcpad count changed (y axis), we can just copy */
if (!sinkresize) {
memcpy (newmatrix, mix->matrix, sizeof (gfloat *) * sinkpads);
/* otherwise we have to copy line by line */
} else {
for (i = 0; i < mix->srcpadalloc; i++)
memcpy (newmatrix[i], mix->matrix[i],
sizeof (gfloat) * mix->srcpadalloc);
}
/* would signal here! */
/* free old matrix and replace it */
mixmatrix_free_matrix (mix->matrix, mix->sinkpadalloc);
mix->matrix = newmatrix;
}
mix->sinkpadalloc = sinkpads;
mix->srcpadalloc = srcpads;
}
#if 0
static gboolean
gst_mixmatrix_set_all_caps (GstMixMatrix * mix)
{
int i;
/* sink pads */
for (i = 0; i < mix->sinkpadalloc; i++) {
if (mix->sinkpads[i]) {
if (GST_PAD_CAPS (mix->sinkpads[i]) == NULL)
if (gst_pad_try_set_caps (mix->sinkpads[i], mix->caps) <= 0)
return FALSE;
}
}
/* src pads */
for (i = 0; i < mix->srcpadalloc; i++) {
if (mix->srcpads[i]) {
if (GST_PAD_CAPS (mix->srcpads[i]) == NULL)
if (gst_pad_try_set_caps (mix->srcpads[i], mix->caps) <= 0)
return FALSE;
}
}
return TRUE;
}
#endif
static GstPadLinkReturn
gst_mixmatrix_connect (GstPad * pad, const GstCaps * caps)
{
GstMixMatrix *mix = GST_MIXMATRIX (GST_PAD_PARENT (pad));
gint i;
for (i = 0; i < mix->srcpadalloc; i++) {
if (mix->srcpads[i]) {
if (GST_PAD_CAPS (mix->srcpads[i]) == NULL) {
if (gst_pad_try_set_caps (mix->srcpads[i], caps) <= 0) {
return GST_PAD_LINK_REFUSED;
}
}
}
}
mix->caps = gst_caps_copy (caps);
return GST_PAD_LINK_OK;
}
static GstPad *
gst_mixmatrix_request_new_pad (GstElement * element, GstPadTemplate * templ,
const gchar * name)
{
GstMixMatrix *mix;
gint padnum;
GstPad *pad = NULL;
g_return_val_if_fail (element != NULL, NULL);
g_return_val_if_fail (GST_IS_MIXMATRIX (element), NULL);
mix = GST_MIXMATRIX (element);
/* figure out if it's a sink pad */
if (sscanf (name, "sink_%u", &padnum)) {
/* check to see if it already exists */
if (padnum < mix->sinkpadalloc && mix->sinkpads[padnum])
return mix->sinkpads[padnum];
/* determine if it's bigger than the current size */
if (padnum >= mix->sinkpadalloc)
mixmatrix_resize (mix, ROUND_UP (padnum, mix->grpsize),
mix->sinkpadalloc);
pad = gst_pad_new_from_static_template (&mixmatrix_sink_template, name);
GST_PAD_ELEMENT_PRIVATE (pad) = GINT_TO_POINTER (padnum);
gst_element_add_pad (GST_ELEMENT (mix), pad);
/* g_signal_connect(G_OBJECT(pad), "unlink", G_CALLBACK(sink_unlinked), mix); */
gst_pad_set_link_function (pad, gst_mixmatrix_connect);
/* create a bytestream for it */
mix->sinkbs[padnum] = gst_bytestream_new (pad);
/* store away the pad and account for it */
mix->sinkpads[padnum] = pad;
}
/* or it's a src pad */
else if (sscanf (name, "src_%u", &padnum)) {
/* check to see if it already exists */
if (padnum < mix->srcpadalloc && mix->srcpads[padnum])
return mix->srcpads[padnum];
/* determine if it's bigger than the current size */
if (padnum >= mix->srcpadalloc)
mixmatrix_resize (mix, ROUND_UP (padnum, mix->grpsize), mix->srcpadalloc);
pad = gst_pad_new_from_static_template (&mixmatrix_src_template, name);
GST_PAD_ELEMENT_PRIVATE (pad) = GINT_TO_POINTER (padnum);
gst_element_add_pad (GST_ELEMENT (mix), pad);
/* g_signal_connect(G_OBJECT(pad), "unlink", G_CALLBACK(sink_unlinked), mix); */
/* gst_pad_set_link_function (pad, gst_mixmatrix_connect); */
/* store away the pad and account for it */
mix->srcpads[padnum] = pad;
}
return pad;
}
static void
gst_mixmatrix_loop (GstElement * element)
{
GstMixMatrix *mix = GST_MIXMATRIX (element);
int i, j, k;
GstBuffer **inbufs;
gfloat **infloats;
GstBuffer **outbufs;
gfloat **outfloats;
int bytesize = sizeof (gfloat) * mix->outsize;
gfloat gain;
/* create the output buffers */
outbufs = g_new (GstBuffer *, mix->srcpadalloc);
outfloats = g_new (gfloat *, mix->srcpadalloc);
for (i = 0; i < mix->srcpadalloc; i++) {
if (mix->srcpads[i] != NULL) {
outbufs[i] = gst_buffer_new_and_alloc (bytesize);
outfloats[i] = (gfloat *) GST_BUFFER_DATA (outbufs[i]);
memset (outfloats[i], 0, bytesize);
}
}
/* go through all the input buffers and pull them */
inbufs = g_new (GstBuffer *, mix->sinkpadalloc);
infloats = g_new (gfloat *, mix->sinkpadalloc);
for (i = 0; i < mix->sinkpadalloc; i++) {
if (mix->sinkpads[i] != NULL) {
gst_bytestream_read (mix->sinkbs[i], &inbufs[i], bytesize);
infloats[i] = (gfloat *) GST_BUFFER_DATA (inbufs[i]);
/* loop through each src pad */
for (j = 0; j < mix->srcpadalloc; j++) {
if (mix->srcpads[j] != NULL) {
/*
{
int z;
fprintf(stderr,"matrix is %p: ",mix->matrix);
for (z=0;z<mix->sinkpadalloc;z++)
fprintf(stderr,"%p, ",mix->matrix[i]);
fprintf(stderr,"\n");
}
fprintf(stderr,"attempting to get gain for %dx%d\n",i,j);
*/
gain = mix->matrix[i][j];
/* fprintf(stderr,"%d->%d=%0.2f ",i,j,gain); */
for (k = 0; k < mix->outsize; k++) {
outfloats[j][k] += infloats[i][k] * gain;
}
}
}
}
}
/* fprintf(stderr,"\n"); */
for (i = 0; i < mix->srcpadalloc; i++) {
if (mix->srcpads[i] != NULL) {
gst_pad_push (mix->srcpads[i], GST_DATA (outbufs[i]));
}
}
}
static void
gst_mixmatrix_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMixMatrix *mix;
g_return_if_fail (GST_IS_MIXMATRIX (object));
mix = GST_MIXMATRIX (object);
switch (prop_id) {
default:
break;
}
}
static void
gst_mixmatrix_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstMixMatrix *mix;
g_return_if_fail (GST_IS_MIXMATRIX (object));
mix = GST_MIXMATRIX (object);
switch (prop_id) {
case ARG_SINKPADS:
g_value_set_int (value, mix->sinkpadalloc);
break;
case ARG_SRCPADS:
g_value_set_int (value, mix->srcpadalloc);
break;
case ARG_MATRIXPTR:
g_value_set_pointer (value, mix->matrix);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GstPlugin * plugin)
{
if (!gst_library_load ("gstbytestream"))
return FALSE;
return gst_element_register (plugin, "mixmatrix",
GST_RANK_NONE, GST_TYPE_MIXMATRIX);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
mixmatrix,
"An audio mixer matrix",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)