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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2004-2007 Marcel Holtmann <marcel@holtmann.org>
*
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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 <string.h>
#include "gstsbcenc.h"
GST_DEBUG_CATEGORY_STATIC(sbc_enc_debug);
#define GST_CAT_DEFAULT sbc_enc_debug
#define GST_TYPE_SBC_MODE (gst_sbc_mode_get_type())
static GType gst_sbc_mode_get_type(void)
{
static GType sbc_mode_type = 0;
static GEnumValue sbc_modes[] = {
{ 0, "Auto", "auto" },
{ 1, "Mono", "mono" },
{ 2, "Dual Channel", "dual" },
{ 3, "Stereo", "stereo" },
{ 4, "Joint Stereo", "joint" },
{ -1, NULL, NULL}
};
if (!sbc_mode_type)
sbc_mode_type = g_enum_register_static("GstSbcMode", sbc_modes);
return sbc_mode_type;
}
enum {
PROP_0,
PROP_MODE,
};
GST_BOILERPLATE(GstSbcEnc, gst_sbc_enc, GstElement, GST_TYPE_ELEMENT);
static const GstElementDetails sbc_enc_details =
GST_ELEMENT_DETAILS("Bluetooth SBC encoder",
"Codec/Encoder/Audio",
"Encode a SBC audio stream",
"Marcel Holtmann <marcel@holtmann.org>");
static GstStaticPadTemplate sbc_enc_sink_factory =
GST_STATIC_PAD_TEMPLATE("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
GST_STATIC_CAPS("audio/x-raw-int, "
"rate = (int) { 16000, 32000, 44100, 48000 }, "
"channels = (int) [ 1, 2 ], "
"endianness = (int) LITTLE_ENDIAN, "
"signed = (boolean) true, "
"width = (int) 16, "
"depth = (int) 16"));
static GstStaticPadTemplate sbc_enc_src_factory =
GST_STATIC_PAD_TEMPLATE("src", GST_PAD_SRC, GST_PAD_ALWAYS,
GST_STATIC_CAPS("audio/x-sbc, "
"rate = (int) { 16000, 32000, 44100, 48000 }, "
"channels = (int) [ 1, 2 ], "
"mode = (string) { mono, dual, stereo, joint }, "
"blocks = (int) { 4, 8, 12, 16 }, "
"subbands = (int) { 4, 8 }, "
"allocation = (string) { snr, loudness }"));
static GstFlowReturn sbc_enc_chain(GstPad *pad, GstBuffer *buffer)
{
GstSbcEnc *enc = GST_SBC_ENC(gst_pad_get_parent(pad));
GstFlowReturn res = GST_FLOW_OK;
GstStructure *structure;
gint rate, channels;
guint size, offset = 0;
guint8 *data;
data = GST_BUFFER_DATA(buffer);
size = GST_BUFFER_SIZE(buffer);
structure = gst_caps_get_structure(GST_PAD_CAPS(pad), 0);
gst_structure_get_int(structure, "rate", &rate);
gst_structure_get_int(structure, "channels", &channels);
enc->sbc.rate = rate;
enc->sbc.channels = channels;
enc->sbc.subbands = 8;
enc->sbc.joint = 0;
while (offset < size) {
GstBuffer *output;
GstCaps *caps;
int consumed;
consumed = sbc_encode(&enc->sbc, data + offset, size - offset);
if (consumed <= 0)
break;
caps = GST_PAD_CAPS(enc->srcpad);
res = gst_pad_alloc_buffer_and_set_caps(enc->srcpad,
GST_BUFFER_OFFSET_NONE,
enc->sbc.len, caps, &output);
if (res != GST_FLOW_OK)
goto done;
memcpy(GST_BUFFER_DATA(output), enc->sbc.data, enc->sbc.len);
res = gst_pad_push(enc->srcpad, output);
if (res != GST_FLOW_OK)
goto done;
offset += consumed;
}
if (offset < size)
res = GST_FLOW_ERROR;
done:
gst_buffer_unref(buffer);
gst_object_unref(enc);
return res;
}
static GstStateChangeReturn sbc_enc_change_state(GstElement *element,
GstStateChange transition)
{
GstSbcEnc *enc = GST_SBC_ENC(element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
GST_DEBUG("Setup subband codec");
sbc_init(&enc->sbc, 0);
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_DEBUG("Finish subband codec");
sbc_finish(&enc->sbc);
break;
default:
break;
}
return parent_class->change_state(element, transition);
}
static void gst_sbc_enc_base_init(gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS(g_class);
gst_element_class_add_pad_template(element_class,
gst_static_pad_template_get(&sbc_enc_sink_factory));
gst_element_class_add_pad_template(element_class,
gst_static_pad_template_get(&sbc_enc_src_factory));
gst_element_class_set_details(element_class, &sbc_enc_details);
}
static void gst_sbc_enc_set_property(GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec)
{
GstSbcEnc *enc = GST_SBC_ENC(object);
switch (prop_id) {
case PROP_MODE:
enc->mode = g_value_get_enum(value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void gst_sbc_enc_get_property(GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec)
{
GstSbcEnc *enc = GST_SBC_ENC(object);
switch (prop_id) {
case PROP_MODE:
g_value_set_enum(value, enc->mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
break;
}
}
static void gst_sbc_enc_class_init(GstSbcEncClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS(klass);
GstElementClass *element_class = GST_ELEMENT_CLASS(klass);
parent_class = g_type_class_peek_parent(klass);
object_class->set_property = GST_DEBUG_FUNCPTR(gst_sbc_enc_set_property);
object_class->get_property = GST_DEBUG_FUNCPTR(gst_sbc_enc_get_property);
element_class->change_state = GST_DEBUG_FUNCPTR(sbc_enc_change_state);
g_object_class_install_property(object_class, PROP_MODE,
g_param_spec_enum("mode", "Mode", "Encoding mode",
GST_TYPE_SBC_MODE, 0, G_PARAM_READWRITE));
GST_DEBUG_CATEGORY_INIT(sbc_enc_debug, "sbcenc", 0,
"SBC encoding element");
}
static void gst_sbc_enc_init(GstSbcEnc *self, GstSbcEncClass *klass)
{
self->sinkpad = gst_pad_new_from_static_template(&sbc_enc_sink_factory, "sink");
gst_element_add_pad(GST_ELEMENT(self), self->sinkpad);
self->srcpad = gst_pad_new_from_static_template(&sbc_enc_src_factory, "src");
gst_pad_set_chain_function(self->sinkpad, GST_DEBUG_FUNCPTR(sbc_enc_chain));
gst_element_add_pad(GST_ELEMENT(self), self->srcpad);
}
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