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/* 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 <string.h>
#include "gstspeexenc.h"
extern GstPadTemplate *speexenc_src_template, *speexenc_sink_template;
/* elementfactory information */
GstElementDetails gst_speexenc_details = {
"speex audio encoder",
"Codec/Audio/Encoder",
"LGPL",
".speex",
VERSION,
"Wim Taymans <wim.taymans@chello.be>",
"(C) 2000",
};
/* SpeexEnc signals and args */
enum {
FRAME_ENCODED,
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
/* FILL ME */
};
static void gst_speexenc_class_init (GstSpeexEnc *klass);
static void gst_speexenc_init (GstSpeexEnc *speexenc);
static void gst_speexenc_chain (GstPad *pad,GstBuffer *buf);
static GstPadLinkReturn gst_speexenc_sinkconnect (GstPad *pad, GstCaps *caps);
static GstElementClass *parent_class = NULL;
static guint gst_speexenc_signals[LAST_SIGNAL] = { 0 };
GType
gst_speexenc_get_type (void)
{
static GType speexenc_type = 0;
if (!speexenc_type) {
static const GTypeInfo speexenc_info = {
sizeof (GstSpeexEncClass),
NULL,
NULL,
(GClassInitFunc) gst_speexenc_class_init,
NULL,
NULL,
sizeof (GstSpeexEnc),
0,
(GInstanceInitFunc) gst_speexenc_init,
};
speexenc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstSpeexEnc", &speexenc_info, 0);
}
return speexenc_type;
}
static void
gst_speexenc_class_init (GstSpeexEnc *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*) klass;
gstelement_class = (GstElementClass*) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gst_speexenc_signals[FRAME_ENCODED] =
g_signal_new ("frame_encoded", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstSpeexEncClass, frame_encoded), NULL, NULL,
g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
}
static void
gst_speexenc_init (GstSpeexEnc *speexenc)
{
/* create the sink and src pads */
speexenc->sinkpad = gst_pad_new_from_template (speexenc_sink_template, "sink");
gst_element_add_pad (GST_ELEMENT (speexenc), speexenc->sinkpad);
gst_pad_set_chain_function (speexenc->sinkpad, gst_speexenc_chain);
gst_pad_set_link_function (speexenc->sinkpad, gst_speexenc_sinkconnect);
speexenc->srcpad = gst_pad_new_from_template (speexenc_src_template, "src");
gst_element_add_pad (GST_ELEMENT (speexenc), speexenc->srcpad);
speex_bits_init(&speexenc->bits);
speexenc->mode = &speex_nb_mode;
speexenc->bufsize = 0;
speexenc->packet_count = 0;
speexenc->n_packets = 20;
}
static GstPadLinkReturn
gst_speexenc_sinkconnect (GstPad *pad, GstCaps *caps)
{
GstSpeexEnc *speexenc;
speexenc = GST_SPEEXENC (gst_pad_get_parent (pad));
if (!GST_CAPS_IS_FIXED (caps))
return GST_PAD_LINK_DELAYED;
gst_caps_get_int (caps, "rate", &speexenc->rate);
if (gst_pad_try_set_caps (speexenc->srcpad, GST_CAPS_NEW (
"speex_speex",
"audio/x-speex",
"rate", GST_PROPS_INT (speexenc->rate),
"channels", GST_PROPS_INT (1)
)))
{
speex_init_header(&speexenc->header, speexenc->rate, 1, speexenc->mode);
speexenc->header.frames_per_packet = speexenc->n_packets;
speexenc->state = speex_encoder_init(speexenc->mode);
speex_encoder_ctl(speexenc->state, SPEEX_GET_FRAME_SIZE, &speexenc->frame_size);
return GST_PAD_LINK_OK;
}
return GST_PAD_LINK_REFUSED;
}
static void
gst_speexenc_chain (GstPad *pad, GstBuffer *buf)
{
GstSpeexEnc *speexenc;
GstBuffer *outbuf;
gint16 *data;
guint8 *header_data;
gint size;
float input[1000];
gint frame_size;
gint i;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
speexenc = GST_SPEEXENC (GST_OBJECT_PARENT (pad));
if (!GST_PAD_CAPS (speexenc->srcpad)) {
if (!gst_pad_try_set_caps (speexenc->srcpad,
GST_CAPS_NEW (
"speex_enc",
"audio/x-speex",
"rate", GST_PROPS_INT (speexenc->rate),
"channels", GST_PROPS_INT (1)
)))
{
gst_element_gerror(GST_ELEMENT (speexenc), GST_ERROR_UNKNOWN,
g_strdup ("unconverted error, file a bug"),
g_strdup_printf("could not negotiate"));
return;
}
}
if (speexenc->packet_count == 0) {
header_data = speex_header_to_packet(&speexenc->header, &size);
outbuf = gst_buffer_new ();
GST_BUFFER_DATA (outbuf) = header_data;
GST_BUFFER_SIZE (outbuf) = size;
gst_pad_push (speexenc->srcpad, outbuf);
}
data = (gint16 *) GST_BUFFER_DATA (buf);
size = GST_BUFFER_SIZE (buf) / sizeof (gint16);
frame_size = speexenc->frame_size;
if (speexenc->bufsize && (speexenc->bufsize + size >= frame_size)) {
memcpy (speexenc->buffer + speexenc->bufsize, data, (frame_size - speexenc->bufsize) * sizeof (gint16));
for (i = 0; i < frame_size; i++)
input[i] = speexenc->buffer[i];
speex_encode (speexenc->state, input, &speexenc->bits);
speexenc->packet_count++;
if (speexenc->packet_count % speexenc->n_packets == 0) {
GstBuffer *outbuf;
outbuf = gst_buffer_new_and_alloc (frame_size * speexenc->n_packets);
GST_BUFFER_SIZE (outbuf) = speex_bits_write(&speexenc->bits,
GST_BUFFER_DATA (outbuf), GST_BUFFER_SIZE (outbuf));
GST_BUFFER_TIMESTAMP (outbuf) = speexenc->next_ts;
speex_bits_reset(&speexenc->bits);
gst_pad_push (speexenc->srcpad, outbuf);
speexenc->next_ts += frame_size * GST_SECOND / speexenc->rate;
}
size -= (speexenc->frame_size - speexenc->bufsize);
data += (speexenc->frame_size - speexenc->bufsize);
speexenc->bufsize = 0;
}
while (size >= frame_size) {
for (i = 0; i < frame_size; i++)
input[i] = data[i];
speex_encode (speexenc->state, input, &speexenc->bits);
speexenc->packet_count++;
if (speexenc->packet_count % speexenc->n_packets == 0) {
GstBuffer *outbuf;
outbuf = gst_buffer_new_and_alloc (frame_size * speexenc->n_packets);
GST_BUFFER_SIZE (outbuf) = speex_bits_write(&speexenc->bits,
GST_BUFFER_DATA (outbuf), GST_BUFFER_SIZE (outbuf));
GST_BUFFER_TIMESTAMP (outbuf) = speexenc->next_ts;
speex_bits_reset(&speexenc->bits);
gst_pad_push (speexenc->srcpad, outbuf);
speexenc->next_ts += frame_size * GST_SECOND / speexenc->rate;
}
size -= frame_size;
data += frame_size;
}
if (size) {
memcpy (speexenc->buffer + speexenc->bufsize, data, size * sizeof (gint16));
speexenc->bufsize += size;
}
gst_buffer_unref(buf);
}
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