mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-08 18:39:54 +00:00
4304e0f438
Original commit message from CVS: * gst/law/alaw-decode.c: (alawdec_getcaps): * gst/law/alaw-encode.c: (alawenc_getcaps), (gst_alawenc_chain): * gst/law/mulaw-decode.c: (mulawdec_getcaps): * gst/law/mulaw-encode.c: (mulawenc_getcaps): Fix negotiation to deal with ANY/EMPTY caps instead of leaking.
250 lines
6.9 KiB
C
250 lines
6.9 KiB
C
/* GStreamer
|
|
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
|
|
*
|
|
* 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>
|
|
#include "mulaw-encode.h"
|
|
#include "mulaw-conversion.h"
|
|
|
|
extern GstPadTemplate *mulawenc_src_template, *mulawenc_sink_template;
|
|
|
|
/* Stereo signals and args */
|
|
enum
|
|
{
|
|
/* FILL ME */
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
enum
|
|
{
|
|
ARG_0
|
|
};
|
|
|
|
static void gst_mulawenc_class_init (GstMuLawEncClass * klass);
|
|
static void gst_mulawenc_base_init (GstMuLawEncClass * klass);
|
|
static void gst_mulawenc_init (GstMuLawEnc * mulawenc);
|
|
|
|
static GstFlowReturn gst_mulawenc_chain (GstPad * pad, GstBuffer * buffer);
|
|
|
|
static GstElementClass *parent_class = NULL;
|
|
|
|
/*static guint gst_stereo_signals[LAST_SIGNAL] = { 0 }; */
|
|
|
|
static GstCaps *
|
|
mulawenc_getcaps (GstPad * pad)
|
|
{
|
|
GstMuLawEnc *mulawenc;
|
|
GstPad *otherpad;
|
|
GstCaps *base_caps, *othercaps;
|
|
|
|
mulawenc = GST_MULAWENC (GST_PAD_PARENT (pad));
|
|
|
|
base_caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
|
|
|
|
if (pad == mulawenc->srcpad) {
|
|
otherpad = mulawenc->sinkpad;
|
|
} else {
|
|
otherpad = mulawenc->srcpad;
|
|
}
|
|
othercaps = gst_pad_peer_get_caps (otherpad);
|
|
if (othercaps) {
|
|
GstStructure *structure;
|
|
const GValue *orate, *ochans;
|
|
const GValue *rate, *chans;
|
|
GValue irate = { 0 }, ichans = {
|
|
0};
|
|
|
|
if (gst_caps_is_empty (othercaps) || gst_caps_is_any (othercaps))
|
|
goto done;
|
|
|
|
structure = gst_caps_get_structure (othercaps, 0);
|
|
orate = gst_structure_get_value (structure, "rate");
|
|
ochans = gst_structure_get_value (structure, "channels");
|
|
if (!orate || !ochans)
|
|
goto done;
|
|
|
|
structure = gst_caps_get_structure (base_caps, 0);
|
|
rate = gst_structure_get_value (structure, "rate");
|
|
chans = gst_structure_get_value (structure, "channels");
|
|
if (!rate || !chans)
|
|
goto done;
|
|
|
|
gst_value_intersect (&irate, orate, rate);
|
|
gst_value_intersect (&ichans, ochans, chans);
|
|
|
|
/* Set the samplerate/channels on the to-be-returned caps */
|
|
structure = gst_caps_get_structure (base_caps, 0);
|
|
gst_structure_set_value (structure, "rate", &irate);
|
|
gst_structure_set_value (structure, "channels", &ichans);
|
|
|
|
done:
|
|
gst_caps_unref (othercaps);
|
|
}
|
|
return base_caps;
|
|
}
|
|
|
|
static gboolean
|
|
mulawenc_setcaps (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstMuLawEnc *mulawenc;
|
|
GstPad *otherpad;
|
|
GstStructure *structure;
|
|
GstCaps *base_caps;
|
|
|
|
mulawenc = GST_MULAWENC (gst_pad_get_parent (pad));
|
|
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
gst_structure_get_int (structure, "channels", &mulawenc->channels);
|
|
gst_structure_get_int (structure, "rate", &mulawenc->rate);
|
|
|
|
if (pad == mulawenc->sinkpad) {
|
|
otherpad = mulawenc->srcpad;
|
|
} else {
|
|
otherpad = mulawenc->sinkpad;
|
|
}
|
|
base_caps = gst_caps_copy (gst_pad_get_pad_template_caps (otherpad));
|
|
|
|
structure = gst_caps_get_structure (base_caps, 0);
|
|
gst_structure_set (structure, "rate", G_TYPE_INT, mulawenc->rate, NULL);
|
|
gst_structure_set (structure, "channels", G_TYPE_INT, mulawenc->channels,
|
|
NULL);
|
|
|
|
gst_pad_set_caps (otherpad, base_caps);
|
|
|
|
gst_object_unref (mulawenc);
|
|
gst_caps_unref (base_caps);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
GType
|
|
gst_mulawenc_get_type (void)
|
|
{
|
|
static GType mulawenc_type = 0;
|
|
|
|
if (!mulawenc_type) {
|
|
static const GTypeInfo mulawenc_info = {
|
|
sizeof (GstMuLawEncClass),
|
|
(GBaseInitFunc) gst_mulawenc_base_init,
|
|
NULL,
|
|
(GClassInitFunc) gst_mulawenc_class_init,
|
|
NULL,
|
|
NULL,
|
|
sizeof (GstMuLawEnc),
|
|
0,
|
|
(GInstanceInitFunc) gst_mulawenc_init,
|
|
};
|
|
|
|
mulawenc_type =
|
|
g_type_register_static (GST_TYPE_ELEMENT, "GstMuLawEnc", &mulawenc_info,
|
|
0);
|
|
}
|
|
return mulawenc_type;
|
|
}
|
|
|
|
static void
|
|
gst_mulawenc_base_init (GstMuLawEncClass * klass)
|
|
{
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
|
const GstElementDetails mulawenc_details =
|
|
GST_ELEMENT_DETAILS ("Mu Law audio encoder",
|
|
"Codec/Encoder/Audio",
|
|
"Convert 16bit PCM to 8bit mu law",
|
|
"Zaheer Abbas Merali <zaheerabbas at merali dot org>");
|
|
|
|
gst_element_class_add_pad_template (element_class, mulawenc_src_template);
|
|
gst_element_class_add_pad_template (element_class, mulawenc_sink_template);
|
|
gst_element_class_set_details (element_class, &mulawenc_details);
|
|
}
|
|
|
|
static void
|
|
gst_mulawenc_class_init (GstMuLawEncClass * klass)
|
|
{
|
|
parent_class = g_type_class_peek_parent (klass);
|
|
}
|
|
|
|
static void
|
|
gst_mulawenc_init (GstMuLawEnc * mulawenc)
|
|
{
|
|
mulawenc->sinkpad =
|
|
gst_pad_new_from_template (mulawenc_sink_template, "sink");
|
|
gst_pad_set_setcaps_function (mulawenc->sinkpad, mulawenc_setcaps);
|
|
gst_pad_set_getcaps_function (mulawenc->sinkpad, mulawenc_getcaps);
|
|
gst_pad_set_chain_function (mulawenc->sinkpad, gst_mulawenc_chain);
|
|
gst_element_add_pad (GST_ELEMENT (mulawenc), mulawenc->sinkpad);
|
|
|
|
mulawenc->srcpad = gst_pad_new_from_template (mulawenc_src_template, "src");
|
|
gst_pad_set_setcaps_function (mulawenc->srcpad, mulawenc_setcaps);
|
|
gst_pad_set_getcaps_function (mulawenc->srcpad, mulawenc_getcaps);
|
|
gst_element_add_pad (GST_ELEMENT (mulawenc), mulawenc->srcpad);
|
|
|
|
/* init rest */
|
|
mulawenc->channels = 0;
|
|
mulawenc->rate = 0;
|
|
mulawenc->ts = 0;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_mulawenc_chain (GstPad * pad, GstBuffer * buffer)
|
|
{
|
|
GstMuLawEnc *mulawenc;
|
|
gint16 *linear_data;
|
|
guint8 *mulaw_data;
|
|
guint mulaw_size;
|
|
GstBuffer *outbuf;
|
|
GstFlowReturn ret;
|
|
|
|
mulawenc = GST_MULAWENC (gst_pad_get_parent (pad));
|
|
|
|
if (!mulawenc->rate || !mulawenc->channels)
|
|
goto not_negotiated;
|
|
|
|
linear_data = (gint16 *) GST_BUFFER_DATA (buffer);
|
|
mulaw_size = GST_BUFFER_SIZE (buffer) / 2;
|
|
|
|
outbuf = gst_buffer_new_and_alloc (mulaw_size);
|
|
mulaw_data = (guint8 *) GST_BUFFER_DATA (outbuf);
|
|
|
|
/* copy discont flag */
|
|
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))
|
|
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
|
|
|
|
GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buffer);
|
|
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buffer);
|
|
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (mulawenc->srcpad));
|
|
|
|
mulaw_encode (linear_data, mulaw_data, mulaw_size);
|
|
|
|
gst_buffer_unref (buffer);
|
|
|
|
ret = gst_pad_push (mulawenc->srcpad, outbuf);
|
|
|
|
done:
|
|
gst_object_unref (mulawenc);
|
|
|
|
return ret;
|
|
|
|
not_negotiated:
|
|
{
|
|
ret = GST_FLOW_NOT_NEGOTIATED;
|
|
goto done;
|
|
}
|
|
}
|