gstreamer/ext/speex/gstspeexenc.c

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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"
static GstPadTemplate *speexenc_src_template, *speexenc_sink_template;
/* elementfactory information */
GstElementDetails gst_speexenc_details = {
"speex audio encoder",
"Codec/Audio/Encoder",
".speex",
"Wim Taymans <wim.taymans@chello.be>",
};
/* SpeexEnc signals and args */
enum {
FRAME_ENCODED,
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
/* FILL ME */
};
static void gst_speexenc_base_init (gpointer g_class);
static void gst_speexenc_class_init (GstSpeexEnc *klass);
static void gst_speexenc_init (GstSpeexEnc *speexenc);
static void gst_speexenc_chain (GstPad *pad,GstData *_data);
static GstPadLinkReturn gst_speexenc_sinkconnect (GstPad *pad, const 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),
gst_speexenc_base_init,
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 GstStaticPadTemplate speex_sink_template =
GST_STATIC_PAD_TEMPLATE (
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) true, "
"width = (int) 16, "
"depth = (int) 16, "
"rate = (int) [ 1000, 48000 ], "
"channels = (int) 1"
)
);
static GstStaticPadTemplate speex_src_template =
GST_STATIC_PAD_TEMPLATE (
"src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-speex, "
"rate = (int) [ 1000, 48000 ], "
"channels = (int) 1"
)
);
static void
gst_speexenc_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 (&speex_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&speex_src_template));
gst_element_class_set_details (element_class, &gst_speexenc_details);
}
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, const GstCaps *caps)
{
GstSpeexEnc *speexenc;
GstStructure *structure;
speexenc = GST_SPEEXENC (gst_pad_get_parent (pad));
structure = gst_caps_get_structure (caps, 0);
gst_structure_get_int (structure, "rate", &speexenc->rate);
if (gst_pad_try_set_caps (speexenc->srcpad,
gst_caps_new_simple ("audio/x-speex",
"rate", G_TYPE_INT, speexenc->rate,
"channels", G_TYPE_INT, 1,
NULL)))
{
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, GstData *_data)
{
GstBuffer *buf = GST_BUFFER (_data);
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_simple ("audio/x-speex",
"rate", G_TYPE_INT, speexenc->rate,
"channels", G_TYPE_INT, 1,
NULL)))
{
gst_element_error (GST_ELEMENT (speexenc), "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, GST_DATA (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, GST_DATA (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, GST_DATA (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);
}