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gstreamer/gst/interleave/interleave.c
David Schleef f6c348430e interleave: Work around changes in g_atomic API 
See #651514 for details.
2011-06-04 13:49:52 -07:00

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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>
* 2008 Sebastian Dröge <slomo@circular-chaos.rg>
*
* interleave.c: interleave samples, mostly based on adder.
*
* 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.
*/
/* TODO:
* - handle caps changes
* - handle more queries/events
*/
/**
* SECTION:element-interleave
* @see_also: deinterleave
*
* Merges separate mono inputs into one interleaved stream.
*
* This element handles all raw floating point sample formats and all signed integer sample formats. The first
* caps on one of the sinkpads will set the caps of the output so usually an audioconvert element should be
* placed before every sinkpad of interleave.
*
* It's possible to change the number of channels while the pipeline is running by adding or removing
* some of the request pads but this will change the caps of the output buffers. Changing the input
* caps is _not_ supported yet.
*
* The channel number of every sinkpad in the out can be retrieved from the "channel" property of the pad.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch filesrc location=file.mp3 ! decodebin ! audioconvert ! "audio/x-raw-int,channels=2" ! deinterleave name=d interleave name=i ! audioconvert ! wavenc ! filesink location=test.wav d.src0 ! queue ! audioconvert ! i.sink1 d.src1 ! queue ! audioconvert ! i.sink0
* ]| Decodes and deinterleaves a Stereo MP3 file into separate channels and
* then interleaves the channels again to a WAV file with the channel with the
* channels exchanged.
* |[
* gst-launch interleave name=i ! audioconvert ! wavenc ! filesink location=file.wav filesrc location=file1.wav ! decodebin ! audioconvert ! "audio/x-raw-int,channels=1" ! queue ! i.sink0 filesrc location=file2.wav ! decodebin ! audioconvert ! "audio/x-raw-int,channels=1" ! queue ! i.sink1
* ]| Interleaves two Mono WAV files to a single Stereo WAV file.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <gst/gst.h>
#include <string.h>
#include "interleave.h"
#include <gst/audio/multichannel.h>
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-int, "
"rate = (int) [ 1, MAX ], "
"channels = (int) 1, "
"endianness = (int) { LITTLE_ENDIAN, BIG_ENDIAN }, "
"width = (int) { 8, 16, 24, 32 }, "
"depth = (int) [ 1, 32 ], "
"signed = (boolean) true; "
"audio/x-raw-float, "
"rate = (int) [ 1, MAX ], "
"channels = (int) 1, "
"endianness = (int) { LITTLE_ENDIAN , BIG_ENDIAN }, "
"width = (int) { 32, 64 }")
);
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"rate = (int) [ 1, MAX ], "
"channels = (int) [ 1, MAX ], "
"endianness = (int) { LITTLE_ENDIAN, BIG_ENDIAN }, "
"width = (int) { 8, 16, 24, 32 }, "
"depth = (int) [ 1, 32 ], "
"signed = (boolean) true; "
"audio/x-raw-float, "
"rate = (int) [ 1, MAX ], "
"channels = (int) [ 1, MAX ], "
"endianness = (int) { LITTLE_ENDIAN , BIG_ENDIAN }, "
"width = (int) { 32, 64 }")
);
#define MAKE_FUNC(type) \
static void interleave_##type (guint##type *out, guint##type *in, \
guint stride, guint nframes) \
{ \
gint i; \
\
for (i = 0; i < nframes; i++) { \
*out = in[i]; \
out += stride; \
} \
}
MAKE_FUNC (8);
MAKE_FUNC (16);
MAKE_FUNC (32);
MAKE_FUNC (64);
static void
interleave_24 (guint8 * out, guint8 * in, guint stride, guint nframes)
{
gint i;
for (i = 0; i < nframes; i++) {
memcpy (out, in, 3);
out += stride * 3;
in += 3;
}
}
typedef struct
{
GstPad parent;
guint channel;
} GstInterleavePad;
enum
{
PROP_PAD_0,
PROP_PAD_CHANNEL
};
static void gst_interleave_pad_class_init (GstPadClass * klass);
#define GST_TYPE_INTERLEAVE_PAD (gst_interleave_pad_get_type())
#define GST_INTERLEAVE_PAD(pad) (G_TYPE_CHECK_INSTANCE_CAST((pad),GST_TYPE_INTERLEAVE_PAD,GstInterleavePad))
#define GST_INTERLEAVE_PAD_CAST(pad) ((GstInterleavePad *) pad)
#define GST_IS_INTERLEAVE_PAD(pad) (G_TYPE_CHECK_INSTANCE_TYPE((pad),GST_TYPE_INTERLEAVE_PAD))
static GType
gst_interleave_pad_get_type (void)
{
static GType type = 0;
if (G_UNLIKELY (type == 0)) {
type = g_type_register_static_simple (GST_TYPE_PAD,
g_intern_static_string ("GstInterleavePad"), sizeof (GstPadClass),
(GClassInitFunc) gst_interleave_pad_class_init,
sizeof (GstInterleavePad), NULL, 0);
}
return type;
}
static void
gst_interleave_pad_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstInterleavePad *self = GST_INTERLEAVE_PAD (object);
switch (prop_id) {
case PROP_PAD_CHANNEL:
g_value_set_uint (value, self->channel);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_interleave_pad_class_init (GstPadClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->get_property = gst_interleave_pad_get_property;
g_object_class_install_property (gobject_class,
PROP_PAD_CHANNEL,
g_param_spec_uint ("channel",
"Channel number",
"Number of the channel of this pad in the output", 0, G_MAXUINT, 0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
}
GST_BOILERPLATE (GstInterleave, gst_interleave, GstElement, GST_TYPE_ELEMENT);
enum
{
PROP_0,
PROP_CHANNEL_POSITIONS,
PROP_CHANNEL_POSITIONS_FROM_INPUT
};
static void gst_interleave_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_interleave_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstPad *gst_interleave_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name);
static void gst_interleave_release_pad (GstElement * element, GstPad * pad);
static GstStateChangeReturn gst_interleave_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_interleave_src_query (GstPad * pad, GstQuery * query);
static gboolean gst_interleave_src_event (GstPad * pad, GstEvent * event);
static gboolean gst_interleave_sink_event (GstPad * pad, GstEvent * event);
static gboolean gst_interleave_sink_setcaps (GstPad * pad, GstCaps * caps);
static GstCaps *gst_interleave_sink_getcaps (GstPad * pad);
static GstFlowReturn gst_interleave_collected (GstCollectPads * pads,
GstInterleave * self);
static void
gst_interleave_finalize (GObject * object)
{
GstInterleave *self = GST_INTERLEAVE (object);
if (self->collect) {
gst_object_unref (self->collect);
self->collect = NULL;
}
if (self->channel_positions
&& self->channel_positions != self->input_channel_positions) {
g_value_array_free (self->channel_positions);
self->channel_positions = NULL;
}
if (self->input_channel_positions) {
g_value_array_free (self->input_channel_positions);
self->input_channel_positions = NULL;
}
gst_caps_replace (&self->sinkcaps, NULL);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_interleave_check_channel_positions (GValueArray * positions)
{
gint i;
guint channels;
GstAudioChannelPosition *pos;
gboolean ret;
channels = positions->n_values;
pos = g_new (GstAudioChannelPosition, positions->n_values);
for (i = 0; i < channels; i++) {
GValue *v = g_value_array_get_nth (positions, i);
pos[i] = g_value_get_enum (v);
}
ret = gst_audio_check_channel_positions (pos, channels);
g_free (pos);
return ret;
}
static void
gst_interleave_set_channel_positions (GstInterleave * self, GstStructure * s)
{
GValue pos_array = { 0, };
gint i;
g_value_init (&pos_array, GST_TYPE_ARRAY);
if (self->channel_positions
&& self->channels == self->channel_positions->n_values
&& gst_interleave_check_channel_positions (self->channel_positions)) {
GST_DEBUG_OBJECT (self, "Using provided channel positions");
for (i = 0; i < self->channels; i++)
gst_value_array_append_value (&pos_array,
g_value_array_get_nth (self->channel_positions, i));
} else {
GValue pos_none = { 0, };
GST_WARNING_OBJECT (self, "Using NONE channel positions");
g_value_init (&pos_none, GST_TYPE_AUDIO_CHANNEL_POSITION);
g_value_set_enum (&pos_none, GST_AUDIO_CHANNEL_POSITION_NONE);
for (i = 0; i < self->channels; i++)
gst_value_array_append_value (&pos_array, &pos_none);
g_value_unset (&pos_none);
}
gst_structure_set_value (s, "channel-positions", &pos_array);
g_value_unset (&pos_array);
}
static void
gst_interleave_base_init (gpointer g_class)
{
gst_element_class_set_details_simple (g_class, "Audio interleaver",
"Filter/Converter/Audio",
"Folds many mono channels into one interleaved audio stream",
"Andy Wingo <wingo at pobox.com>, "
"Sebastian Dröge <slomo@circular-chaos.org>");
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;
GObjectClass *gobject_class;
gobject_class = G_OBJECT_CLASS (klass);
gstelement_class = GST_ELEMENT_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (gst_interleave_debug, "interleave", 0,
"interleave element");
/* Reference GstInterleavePad class to have the type registered from
* a threadsafe context
*/
g_type_class_ref (GST_TYPE_INTERLEAVE_PAD);
gobject_class->finalize = gst_interleave_finalize;
gobject_class->set_property = gst_interleave_set_property;
gobject_class->get_property = gst_interleave_get_property;
/**
* GstInterleave:channel-positions
*
* Channel positions: This property controls the channel positions
* that are used on the src caps. The number of elements should be
* the same as the number of sink pads and the array should contain
* a valid list of channel positions. The n-th element of the array
* is the position of the n-th sink pad.
*
* These channel positions will only be used if they're valid and the
* number of elements is the same as the number of channels. If this
* is not given a NONE layout will be used.
*
*/
g_object_class_install_property (gobject_class, PROP_CHANNEL_POSITIONS,
g_param_spec_value_array ("channel-positions", "Channel positions",
"Channel positions used on the output",
g_param_spec_enum ("channel-position", "Channel position",
"Channel position of the n-th input",
GST_TYPE_AUDIO_CHANNEL_POSITION,
GST_AUDIO_CHANNEL_POSITION_NONE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS),
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstInterleave:channel-positions-from-input
*
* Channel positions from input: If this property is set to %TRUE the channel
* positions will be taken from the input caps if valid channel positions for
* the output can be constructed from them. If this is set to %TRUE setting the
* channel-positions property overwrites this property again.
*
*/
g_object_class_install_property (gobject_class,
PROP_CHANNEL_POSITIONS_FROM_INPUT,
g_param_spec_boolean ("channel-positions-from-input",
"Channel positions from input",
"Take channel positions from the input", TRUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_interleave_request_new_pad);
gstelement_class->release_pad =
GST_DEBUG_FUNCPTR (gst_interleave_release_pad);
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_interleave_change_state);
}
static void
gst_interleave_init (GstInterleave * self, GstInterleaveClass * klass)
{
self->src = gst_pad_new_from_static_template (&src_template, "src");
gst_pad_set_query_function (self->src,
GST_DEBUG_FUNCPTR (gst_interleave_src_query));
gst_pad_set_event_function (self->src,
GST_DEBUG_FUNCPTR (gst_interleave_src_event));
gst_element_add_pad (GST_ELEMENT (self), self->src);
self->collect = gst_collect_pads_new ();
gst_collect_pads_set_function (self->collect,
(GstCollectPadsFunction) gst_interleave_collected, self);
self->input_channel_positions = g_value_array_new (0);
self->channel_positions_from_input = TRUE;
self->channel_positions = self->input_channel_positions;
}
static void
gst_interleave_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstInterleave *self = GST_INTERLEAVE (object);
switch (prop_id) {
case PROP_CHANNEL_POSITIONS:
if (self->channel_positions &&
self->channel_positions != self->input_channel_positions)
g_value_array_free (self->channel_positions);
self->channel_positions = g_value_dup_boxed (value);
self->channel_positions_from_input = FALSE;
break;
case PROP_CHANNEL_POSITIONS_FROM_INPUT:
self->channel_positions_from_input = g_value_get_boolean (value);
if (self->channel_positions_from_input) {
if (self->channel_positions &&
self->channel_positions != self->input_channel_positions)
g_value_array_free (self->channel_positions);
self->channel_positions = self->input_channel_positions;
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_interleave_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstInterleave *self = GST_INTERLEAVE (object);
switch (prop_id) {
case PROP_CHANNEL_POSITIONS:
g_value_set_boxed (value, self->channel_positions);
break;
case PROP_CHANNEL_POSITIONS_FROM_INPUT:
g_value_set_boolean (value, self->channel_positions_from_input);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstPad *
gst_interleave_request_new_pad (GstElement * element, GstPadTemplate * templ,
const gchar * req_name)
{
GstInterleave *self = GST_INTERLEAVE (element);
GstPad *new_pad;
gchar *pad_name;
gint channels, padnumber;
GValue val = { 0, };
if (templ->direction != GST_PAD_SINK)
goto not_sink_pad;
#if GLIB_CHECK_VERSION(2,29,5)
channels = g_atomic_int_add (&self->channels, 1);
padnumber = g_atomic_int_add (&self->padcounter, 1);
#else
channels = g_atomic_int_exchange_and_add (&self->channels, 1);
padnumber = g_atomic_int_exchange_and_add (&self->padcounter, 1);
#endif
pad_name = g_strdup_printf ("sink%d", padnumber);
new_pad = GST_PAD_CAST (g_object_new (GST_TYPE_INTERLEAVE_PAD,
"name", pad_name, "direction", templ->direction,
"template", templ, NULL));
GST_INTERLEAVE_PAD_CAST (new_pad)->channel = channels;
GST_DEBUG_OBJECT (self, "requested new pad %s", pad_name);
g_free (pad_name);
gst_pad_set_setcaps_function (new_pad,
GST_DEBUG_FUNCPTR (gst_interleave_sink_setcaps));
gst_pad_set_getcaps_function (new_pad,
GST_DEBUG_FUNCPTR (gst_interleave_sink_getcaps));
gst_collect_pads_add_pad (self->collect, new_pad, sizeof (GstCollectData));
/* FIXME: hacked way to override/extend the event function of
* GstCollectPads; because it sets its own event function giving the
* element no access to events */
self->collect_event = (GstPadEventFunction) GST_PAD_EVENTFUNC (new_pad);
gst_pad_set_event_function (new_pad,
GST_DEBUG_FUNCPTR (gst_interleave_sink_event));
if (!gst_element_add_pad (element, new_pad))
goto could_not_add;
g_value_init (&val, GST_TYPE_AUDIO_CHANNEL_POSITION);
g_value_set_enum (&val, GST_AUDIO_CHANNEL_POSITION_NONE);
self->input_channel_positions =
g_value_array_append (self->input_channel_positions, &val);
g_value_unset (&val);
/* Update the src caps if we already have them */
if (self->sinkcaps) {
GstCaps *srccaps;
GstStructure *s;
/* Take lock to make sure processing finishes first */
GST_OBJECT_LOCK (self->collect);
srccaps = gst_caps_copy (self->sinkcaps);
s = gst_caps_get_structure (srccaps, 0);
gst_structure_set (s, "channels", G_TYPE_INT, self->channels, NULL);
gst_interleave_set_channel_positions (self, s);
gst_pad_set_caps (self->src, srccaps);
gst_caps_unref (srccaps);
GST_OBJECT_UNLOCK (self->collect);
}
return new_pad;
/* errors */
not_sink_pad:
{
g_warning ("interleave: requested new pad that is not a SINK pad\n");
return NULL;
}
could_not_add:
{
GST_DEBUG_OBJECT (self, "could not add pad %s", GST_PAD_NAME (new_pad));
gst_collect_pads_remove_pad (self->collect, new_pad);
gst_object_unref (new_pad);
return NULL;
}
}
static void
gst_interleave_release_pad (GstElement * element, GstPad * pad)
{
GstInterleave *self = GST_INTERLEAVE (element);
GList *l;
g_return_if_fail (GST_IS_INTERLEAVE_PAD (pad));
/* Take lock to make sure we're not changing this when processing buffers */
GST_OBJECT_LOCK (self->collect);
g_atomic_int_add (&self->channels, -1);
g_value_array_remove (self->input_channel_positions,
GST_INTERLEAVE_PAD_CAST (pad)->channel);
/* Update channel numbers */
GST_OBJECT_LOCK (self);
for (l = GST_ELEMENT_CAST (self)->sinkpads; l != NULL; l = l->next) {
GstInterleavePad *ipad = GST_INTERLEAVE_PAD (l->data);
if (GST_INTERLEAVE_PAD_CAST (pad)->channel < ipad->channel)
ipad->channel--;
}
GST_OBJECT_UNLOCK (self);
/* Update the src caps if we already have them */
if (self->sinkcaps) {
if (self->channels > 0) {
GstCaps *srccaps;
GstStructure *s;
srccaps = gst_caps_copy (self->sinkcaps);
s = gst_caps_get_structure (srccaps, 0);
gst_structure_set (s, "channels", G_TYPE_INT, self->channels, NULL);
gst_interleave_set_channel_positions (self, s);
gst_pad_set_caps (self->src, srccaps);
gst_caps_unref (srccaps);
} else {
gst_caps_replace (&self->sinkcaps, NULL);
gst_pad_set_caps (self->src, NULL);
}
}
GST_OBJECT_UNLOCK (self->collect);
gst_collect_pads_remove_pad (self->collect, pad);
gst_element_remove_pad (element, pad);
}
static GstStateChangeReturn
gst_interleave_change_state (GstElement * element, GstStateChange transition)
{
GstInterleave *self;
GstStateChangeReturn ret;
self = GST_INTERLEAVE (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
self->timestamp = 0;
self->offset = 0;
self->segment_pending = TRUE;
self->segment_position = 0;
self->segment_rate = 1.0;
gst_segment_init (&self->segment, GST_FORMAT_UNDEFINED);
gst_collect_pads_start (self->collect);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
/* Stop before calling the parent's state change function as
* GstCollectPads might take locks and we would deadlock in that
* case
*/
if (transition == GST_STATE_CHANGE_PAUSED_TO_READY)
gst_collect_pads_stop (self->collect);
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_pad_set_caps (self->src, NULL);
gst_caps_replace (&self->sinkcaps, NULL);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static void
__remove_channels (GstCaps * caps)
{
GstStructure *s;
gint i, size;
size = gst_caps_get_size (caps);
for (i = 0; i < size; i++) {
s = gst_caps_get_structure (caps, i);
gst_structure_remove_field (s, "channel-positions");
gst_structure_remove_field (s, "channels");
}
}
static void
__set_channels (GstCaps * caps, gint channels)
{
GstStructure *s;
gint i, size;
size = gst_caps_get_size (caps);
for (i = 0; i < size; i++) {
s = gst_caps_get_structure (caps, i);
if (channels > 0)
gst_structure_set (s, "channels", G_TYPE_INT, channels, NULL);
else
gst_structure_set (s, "channels", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);
}
}
/* we can only accept caps that we and downstream can handle. */
static GstCaps *
gst_interleave_sink_getcaps (GstPad * pad)
{
GstInterleave *self = GST_INTERLEAVE (gst_pad_get_parent (pad));
GstCaps *result, *peercaps, *sinkcaps;
GST_OBJECT_LOCK (self);
/* If we already have caps on one of the sink pads return them */
if (self->sinkcaps) {
result = gst_caps_copy (self->sinkcaps);
} else {
/* get the downstream possible caps */
peercaps = gst_pad_peer_get_caps (self->src);
/* get the allowed caps on this sinkpad */
sinkcaps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
__remove_channels (sinkcaps);
if (peercaps) {
__remove_channels (peercaps);
/* if the peer has caps, intersect */
GST_DEBUG_OBJECT (pad, "intersecting peer and template caps");
result = gst_caps_intersect (peercaps, sinkcaps);
gst_caps_unref (peercaps);
gst_caps_unref (sinkcaps);
} else {
/* the peer has no caps (or there is no peer), just use the allowed caps
* of this sinkpad. */
GST_DEBUG_OBJECT (pad, "no peer caps, using sinkcaps");
result = sinkcaps;
}
__set_channels (result, 1);
}
GST_OBJECT_UNLOCK (self);
gst_object_unref (self);
GST_DEBUG_OBJECT (pad, "Returning caps %" GST_PTR_FORMAT, result);
return result;
}
static void
gst_interleave_set_process_function (GstInterleave * self)
{
switch (self->width) {
case 8:
self->func = (GstInterleaveFunc) interleave_8;
break;
case 16:
self->func = (GstInterleaveFunc) interleave_16;
break;
case 24:
self->func = (GstInterleaveFunc) interleave_24;
break;
case 32:
self->func = (GstInterleaveFunc) interleave_32;
break;
case 64:
self->func = (GstInterleaveFunc) interleave_64;
break;
default:
g_assert_not_reached ();
break;
}
}
static gboolean
gst_interleave_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstInterleave *self;
g_return_val_if_fail (GST_IS_INTERLEAVE_PAD (pad), FALSE);
self = GST_INTERLEAVE (gst_pad_get_parent (pad));
/* First caps that are set on a sink pad are used as output caps */
/* TODO: handle caps changes */
if (self->sinkcaps && !gst_caps_is_subset (caps, self->sinkcaps)) {
goto cannot_change_caps;
} else {
GstCaps *srccaps;
GstStructure *s;
gboolean res;
s = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (s, "width", &self->width))
goto no_width;
if (!gst_structure_get_int (s, "rate", &self->rate))
goto no_rate;
gst_interleave_set_process_function (self);
if (gst_structure_has_field (s, "channel-positions")) {
const GValue *pos_array;
pos_array = gst_structure_get_value (s, "channel-positions");
if (GST_VALUE_HOLDS_ARRAY (pos_array)
&& gst_value_array_get_size (pos_array) == 1) {
const GValue *pos = gst_value_array_get_value (pos_array, 0);
GValue *apos = g_value_array_get_nth (self->input_channel_positions,
GST_INTERLEAVE_PAD_CAST (pad)->channel);
g_value_set_enum (apos, g_value_get_enum (pos));
}
}
srccaps = gst_caps_copy (caps);
s = gst_caps_get_structure (srccaps, 0);
gst_structure_set (s, "channels", G_TYPE_INT, self->channels, NULL);
gst_interleave_set_channel_positions (self, s);
res = gst_pad_set_caps (self->src, srccaps);
gst_caps_unref (srccaps);
if (!res)
goto src_did_not_accept;
}
if (!self->sinkcaps) {
GstCaps *sinkcaps = gst_caps_copy (caps);
GstStructure *s = gst_caps_get_structure (sinkcaps, 0);
gst_structure_remove_field (s, "channel-positions");
gst_caps_replace (&self->sinkcaps, sinkcaps);
gst_caps_unref (sinkcaps);
}
gst_object_unref (self);
return TRUE;
cannot_change_caps:
{
GST_WARNING_OBJECT (self, "caps of %" GST_PTR_FORMAT " already set, can't "
"change", self->sinkcaps);
gst_object_unref (self);
return FALSE;
}
src_did_not_accept:
{
GST_WARNING_OBJECT (self, "src did not accept setcaps()");
gst_object_unref (self);
return FALSE;
}
no_width:
{
GST_WARNING_OBJECT (self, "caps did not have width: %" GST_PTR_FORMAT,
caps);
gst_object_unref (self);
return FALSE;
}
no_rate:
{
GST_WARNING_OBJECT (self, "caps did not have rate: %" GST_PTR_FORMAT, caps);
gst_object_unref (self);
return FALSE;
}
}
static gboolean
gst_interleave_sink_event (GstPad * pad, GstEvent * event)
{
GstInterleave *self = GST_INTERLEAVE (gst_pad_get_parent (pad));
gboolean ret;
GST_DEBUG ("Got %s event on pad %s:%s", GST_EVENT_TYPE_NAME (event),
GST_DEBUG_PAD_NAME (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
/* mark a pending new segment. This event is synchronized
* with the streaming thread so we can safely update the
* variable without races. It's somewhat weird because we
* assume the collectpads forwarded the FLUSH_STOP past us
* and downstream (using our source pad, the bastard!).
*/
self->segment_pending = TRUE;
break;
default:
break;
}
/* now GstCollectPads can take care of the rest, e.g. EOS */
ret = self->collect_event (pad, event);
gst_object_unref (self);
return ret;
}
static gboolean
gst_interleave_src_query_duration (GstInterleave * self, GstQuery * query)
{
gint64 max;
gboolean res;
GstFormat format;
GstIterator *it;
gboolean done;
/* parse format */
gst_query_parse_duration (query, &format, NULL);
max = -1;
res = TRUE;
done = FALSE;
/* Take maximum of all durations */
it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (self));
while (!done) {
GstIteratorResult ires;
gpointer item;
ires = gst_iterator_next (it, &item);
switch (ires) {
case GST_ITERATOR_DONE:
done = TRUE;
break;
case GST_ITERATOR_OK:
{
GstPad *pad = GST_PAD_CAST (item);
gint64 duration;
/* ask sink peer for duration */
res &= gst_pad_query_peer_duration (pad, &format, &duration);
/* take max from all valid return values */
if (res) {
/* valid unknown length, stop searching */
if (duration == -1) {
max = duration;
done = TRUE;
}
/* else see if bigger than current max */
else if (duration > max)
max = duration;
}
gst_object_unref (pad);
break;
}
case GST_ITERATOR_RESYNC:
max = -1;
res = TRUE;
gst_iterator_resync (it);
break;
default:
res = FALSE;
done = TRUE;
break;
}
}
gst_iterator_free (it);
if (res) {
/* If in bytes format we have to multiply with the number of channels
* to get the correct results. All other formats should be fine */
if (format == GST_FORMAT_BYTES && max != -1)
max *= self->channels;
/* and store the max */
GST_DEBUG_OBJECT (self, "Total duration in format %s: %"
GST_TIME_FORMAT, gst_format_get_name (format), GST_TIME_ARGS (max));
gst_query_set_duration (query, format, max);
}
return res;
}
static gboolean
gst_interleave_src_query_latency (GstInterleave * self, GstQuery * query)
{
GstClockTime min, max;
gboolean live;
gboolean res;
GstIterator *it;
gboolean done;
res = TRUE;
done = FALSE;
live = FALSE;
min = 0;
max = GST_CLOCK_TIME_NONE;
/* Take maximum of all latency values */
it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (self));
while (!done) {
GstIteratorResult ires;
gpointer item;
ires = gst_iterator_next (it, &item);
switch (ires) {
case GST_ITERATOR_DONE:
done = TRUE;
break;
case GST_ITERATOR_OK:
{
GstPad *pad = GST_PAD_CAST (item);
GstQuery *peerquery;
GstClockTime min_cur, max_cur;
gboolean live_cur;
peerquery = gst_query_new_latency ();
/* Ask peer for latency */
res &= gst_pad_peer_query (pad, peerquery);
/* take max from all valid return values */
if (res) {
gst_query_parse_latency (peerquery, &live_cur, &min_cur, &max_cur);
if (min_cur > min)
min = min_cur;
if (max_cur != GST_CLOCK_TIME_NONE &&
((max != GST_CLOCK_TIME_NONE && max_cur > max) ||
(max == GST_CLOCK_TIME_NONE)))
max = max_cur;
live = live || live_cur;
}
gst_query_unref (peerquery);
gst_object_unref (pad);
break;
}
case GST_ITERATOR_RESYNC:
live = FALSE;
min = 0;
max = GST_CLOCK_TIME_NONE;
res = TRUE;
gst_iterator_resync (it);
break;
default:
res = FALSE;
done = TRUE;
break;
}
}
gst_iterator_free (it);
if (res) {
/* store the results */
GST_DEBUG_OBJECT (self, "Calculated total latency: live %s, min %"
GST_TIME_FORMAT ", max %" GST_TIME_FORMAT,
(live ? "yes" : "no"), GST_TIME_ARGS (min), GST_TIME_ARGS (max));
gst_query_set_latency (query, live, min, max);
}
return res;
}
static gboolean
gst_interleave_src_query (GstPad * pad, GstQuery * query)
{
GstInterleave *self = GST_INTERLEAVE (gst_pad_get_parent (pad));
gboolean res = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
{
GstFormat format;
gst_query_parse_position (query, &format, NULL);
switch (format) {
case GST_FORMAT_TIME:
/* FIXME, bring to stream time, might be tricky */
gst_query_set_position (query, format, self->timestamp);
res = TRUE;
break;
case GST_FORMAT_BYTES:
gst_query_set_position (query, format,
self->offset * self->channels * self->width);
res = TRUE;
break;
case GST_FORMAT_DEFAULT:
gst_query_set_position (query, format, self->offset);
res = TRUE;
break;
default:
break;
}
break;
}
case GST_QUERY_DURATION:
res = gst_interleave_src_query_duration (self, query);
break;
case GST_QUERY_LATENCY:
res = gst_interleave_src_query_latency (self, query);
break;
default:
/* FIXME, needs a custom query handler because we have multiple
* sinkpads */
res = gst_pad_query_default (pad, query);
break;
}
gst_object_unref (self);
return res;
}
static gboolean
forward_event_func (GstPad * pad, GValue * ret, GstEvent * event)
{
gst_event_ref (event);
GST_LOG_OBJECT (pad, "About to send event %s", GST_EVENT_TYPE_NAME (event));
if (!gst_pad_push_event (pad, event)) {
g_value_set_boolean (ret, FALSE);
GST_WARNING_OBJECT (pad, "Sending event %p (%s) failed.",
event, GST_EVENT_TYPE_NAME (event));
} else {
GST_LOG_OBJECT (pad, "Sent event %p (%s).",
event, GST_EVENT_TYPE_NAME (event));
}
gst_object_unref (pad);
return TRUE;
}
static gboolean
forward_event (GstInterleave * self, GstEvent * event)
{
GstIterator *it;
GValue vret = { 0 };
GST_LOG_OBJECT (self, "Forwarding event %p (%s)", event,
GST_EVENT_TYPE_NAME (event));
g_value_init (&vret, G_TYPE_BOOLEAN);
g_value_set_boolean (&vret, TRUE);
it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (self));
gst_iterator_fold (it, (GstIteratorFoldFunction) forward_event_func, &vret,
event);
gst_iterator_free (it);
gst_event_unref (event);
return g_value_get_boolean (&vret);
}
static gboolean
gst_interleave_src_event (GstPad * pad, GstEvent * event)
{
GstInterleave *self = GST_INTERLEAVE (gst_pad_get_parent (pad));
gboolean result;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_QOS:
/* QoS might be tricky */
result = FALSE;
break;
case GST_EVENT_SEEK:
{
GstSeekFlags flags;
GstSeekType curtype;
gint64 cur;
/* parse the seek parameters */
gst_event_parse_seek (event, &self->segment_rate, NULL, &flags, &curtype,
&cur, NULL, NULL);
/* check if we are flushing */
if (flags & GST_SEEK_FLAG_FLUSH) {
/* make sure we accept nothing anymore and return WRONG_STATE */
gst_collect_pads_set_flushing (self->collect, TRUE);
/* flushing seek, start flush downstream, the flush will be done
* when all pads received a FLUSH_STOP. */
gst_pad_push_event (self->src, gst_event_new_flush_start ());
}
/* now wait for the collected to be finished and mark a new
* segment */
GST_OBJECT_LOCK (self->collect);
if (curtype == GST_SEEK_TYPE_SET)
self->segment_position = cur;
else
self->segment_position = 0;
self->segment_pending = TRUE;
GST_OBJECT_UNLOCK (self->collect);
result = forward_event (self, event);
break;
}
case GST_EVENT_NAVIGATION:
/* navigation is rather pointless. */
result = FALSE;
break;
default:
/* just forward the rest for now */
result = forward_event (self, event);
break;
}
gst_object_unref (self);
return result;
}
static GstFlowReturn
gst_interleave_collected (GstCollectPads * pads, GstInterleave * self)
{
guint size;
GstBuffer *outbuf;
GstFlowReturn ret = GST_FLOW_OK;
GSList *collected;
guint nsamples;
guint ncollected = 0;
gboolean empty = TRUE;
gint width = self->width / 8;
g_return_val_if_fail (self->func != NULL, GST_FLOW_NOT_NEGOTIATED);
g_return_val_if_fail (self->width > 0, GST_FLOW_NOT_NEGOTIATED);
g_return_val_if_fail (self->channels > 0, GST_FLOW_NOT_NEGOTIATED);
g_return_val_if_fail (self->rate > 0, GST_FLOW_NOT_NEGOTIATED);
size = gst_collect_pads_available (pads);
g_return_val_if_fail (size % width == 0, GST_FLOW_ERROR);
GST_DEBUG_OBJECT (self, "Starting to collect %u bytes from %d channels", size,
self->channels);
nsamples = size / width;
ret =
gst_pad_alloc_buffer (self->src, GST_BUFFER_OFFSET_NONE,
size * self->channels, GST_PAD_CAPS (self->src), &outbuf);
if (ret != GST_FLOW_OK) {
return ret;
} else if (outbuf == NULL || GST_BUFFER_SIZE (outbuf) < size * self->channels) {
gst_buffer_unref (outbuf);
return GST_FLOW_NOT_NEGOTIATED;
} else if (!gst_caps_is_equal (GST_BUFFER_CAPS (outbuf),
GST_PAD_CAPS (self->src))) {
gst_buffer_unref (outbuf);
return GST_FLOW_NOT_NEGOTIATED;
}
memset (GST_BUFFER_DATA (outbuf), 0, size * self->channels);
for (collected = pads->data; collected != NULL; collected = collected->next) {
GstCollectData *cdata;
GstBuffer *inbuf;
guint8 *outdata;
cdata = (GstCollectData *) collected->data;
inbuf = gst_collect_pads_take_buffer (pads, cdata, size);
if (inbuf == NULL) {
GST_DEBUG_OBJECT (cdata->pad, "No buffer available");
goto next;
}
ncollected++;
if (GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_GAP))
goto next;
empty = FALSE;
outdata =
GST_BUFFER_DATA (outbuf) +
width * GST_INTERLEAVE_PAD_CAST (cdata->pad)->channel;
self->func (outdata, GST_BUFFER_DATA (inbuf), self->channels, nsamples);
next:
if (inbuf)
gst_buffer_unref (inbuf);
}
if (ncollected == 0)
goto eos;
if (self->segment_pending) {
GstEvent *event;
event = gst_event_new_new_segment_full (FALSE, self->segment_rate,
1.0, GST_FORMAT_TIME, self->timestamp, -1, self->segment_position);
gst_pad_push_event (self->src, event);
self->segment_pending = FALSE;
self->segment_position = 0;
}
GST_BUFFER_TIMESTAMP (outbuf) = self->timestamp;
GST_BUFFER_OFFSET (outbuf) = self->offset;
self->offset += nsamples;
self->timestamp = gst_util_uint64_scale_int (self->offset,
GST_SECOND, self->rate);
GST_BUFFER_DURATION (outbuf) = self->timestamp -
GST_BUFFER_TIMESTAMP (outbuf);
if (empty)
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_GAP);
GST_LOG_OBJECT (self, "pushing outbuf, timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)));
ret = gst_pad_push (self->src, outbuf);
return ret;
eos:
{
GST_DEBUG_OBJECT (self, "no data available, must be EOS");
gst_buffer_unref (outbuf);
gst_pad_push_event (self->src, gst_event_new_eos ());
return GST_FLOW_UNEXPECTED;
}
}
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