2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
26 #include "gstspeexenc.h"
28 static GstPadTemplate *speexenc_src_template, *speexenc_sink_template;
30 /* elementfactory information */
31 GstElementDetails gst_speexenc_details = {
32 "speex audio encoder",
33 "Codec/Audio/Encoder",
35 "Wim Taymans <wim.taymans@chello.be>",
38 /* SpeexEnc signals and args */
52 static void gst_speexenc_base_init (gpointer g_class);
53 static void gst_speexenc_class_init (GstSpeexEnc * klass);
54 static void gst_speexenc_init (GstSpeexEnc * speexenc);
56 static void gst_speexenc_chain (GstPad * pad, GstData * _data);
57 static GstPadLinkReturn gst_speexenc_sinkconnect (GstPad * pad,
58 const GstCaps * caps);
60 static GstElementClass *parent_class = NULL;
61 static guint gst_speexenc_signals[LAST_SIGNAL] = { 0 };
64 gst_speexenc_get_type (void)
66 static GType speexenc_type = 0;
69 static const GTypeInfo speexenc_info = {
70 sizeof (GstSpeexEncClass),
71 gst_speexenc_base_init,
73 (GClassInitFunc) gst_speexenc_class_init,
78 (GInstanceInitFunc) gst_speexenc_init,
82 g_type_register_static (GST_TYPE_ELEMENT, "GstSpeexEnc", &speexenc_info,
88 static GstStaticPadTemplate speex_sink_template =
89 GST_STATIC_PAD_TEMPLATE ("sink",
92 GST_STATIC_CAPS ("audio/x-raw-int, "
93 "endianness = (int) BYTE_ORDER, "
94 "signed = (boolean) true, "
97 "rate = (int) [ 1000, 48000 ], " "channels = (int) 1")
100 static GstStaticPadTemplate speex_src_template = GST_STATIC_PAD_TEMPLATE ("src",
103 GST_STATIC_CAPS ("audio/x-speex, "
104 "rate = (int) [ 1000, 48000 ], " "channels = (int) 1")
108 gst_speexenc_base_init (gpointer g_class)
110 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
112 gst_element_class_add_pad_template (element_class,
113 gst_static_pad_template_get (&speex_sink_template));
114 gst_element_class_add_pad_template (element_class,
115 gst_static_pad_template_get (&speex_src_template));
117 gst_element_class_set_details (element_class, &gst_speexenc_details);
121 gst_speexenc_class_init (GstSpeexEnc * klass)
123 GObjectClass *gobject_class;
124 GstElementClass *gstelement_class;
126 gobject_class = (GObjectClass *) klass;
127 gstelement_class = (GstElementClass *) klass;
129 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
131 gst_speexenc_signals[FRAME_ENCODED] =
132 g_signal_new ("frame-encoded", G_TYPE_FROM_CLASS (klass),
133 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstSpeexEncClass, frame_encoded),
134 NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
139 gst_speexenc_init (GstSpeexEnc * speexenc)
141 /* create the sink and src pads */
143 gst_pad_new_from_template (speexenc_sink_template, "sink");
144 gst_element_add_pad (GST_ELEMENT (speexenc), speexenc->sinkpad);
145 gst_pad_set_chain_function (speexenc->sinkpad, gst_speexenc_chain);
146 gst_pad_set_link_function (speexenc->sinkpad, gst_speexenc_sinkconnect);
148 speexenc->srcpad = gst_pad_new_from_template (speexenc_src_template, "src");
149 gst_element_add_pad (GST_ELEMENT (speexenc), speexenc->srcpad);
151 speex_bits_init (&speexenc->bits);
152 speexenc->mode = &speex_nb_mode;
153 speexenc->bufsize = 0;
154 speexenc->packet_count = 0;
155 speexenc->n_packets = 20;
158 static GstPadLinkReturn
159 gst_speexenc_sinkconnect (GstPad * pad, const GstCaps * caps)
161 GstSpeexEnc *speexenc;
162 GstStructure *structure;
164 speexenc = GST_SPEEXENC (gst_pad_get_parent (pad));
166 structure = gst_caps_get_structure (caps, 0);
167 gst_structure_get_int (structure, "rate", &speexenc->rate);
168 if (gst_pad_try_set_caps (speexenc->srcpad,
169 gst_caps_new_simple ("audio/x-speex",
170 "rate", G_TYPE_INT, speexenc->rate,
171 "channels", G_TYPE_INT, 1, NULL))) {
172 speex_init_header (&speexenc->header, speexenc->rate, 1, speexenc->mode);
173 speexenc->header.frames_per_packet = speexenc->n_packets;
175 speexenc->state = speex_encoder_init (speexenc->mode);
176 speex_encoder_ctl (speexenc->state, SPEEX_GET_FRAME_SIZE,
177 &speexenc->frame_size);
179 return GST_PAD_LINK_OK;
181 return GST_PAD_LINK_REFUSED;
186 gst_speexenc_chain (GstPad * pad, GstData * _data)
188 GstBuffer *buf = GST_BUFFER (_data);
189 GstSpeexEnc *speexenc;
198 g_return_if_fail (pad != NULL);
199 g_return_if_fail (GST_IS_PAD (pad));
200 g_return_if_fail (buf != NULL);
202 speexenc = GST_SPEEXENC (GST_OBJECT_PARENT (pad));
204 if (!GST_PAD_CAPS (speexenc->srcpad)) {
206 if (!gst_pad_try_set_caps (speexenc->srcpad,
207 gst_caps_new_simple ("audio/x-speex",
208 "rate", G_TYPE_INT, speexenc->rate,
209 "channels", G_TYPE_INT, 1, NULL))) {
210 GST_ELEMENT_ERROR (speexenc, CORE, NEGOTIATION, (NULL), (NULL));
215 if (speexenc->packet_count == 0) {
216 header_data = speex_header_to_packet (&speexenc->header, &size);
218 outbuf = gst_buffer_new ();
219 GST_BUFFER_DATA (outbuf) = header_data;
220 GST_BUFFER_SIZE (outbuf) = size;
222 gst_pad_push (speexenc->srcpad, GST_DATA (outbuf));
225 data = (gint16 *) GST_BUFFER_DATA (buf);
226 size = GST_BUFFER_SIZE (buf) / sizeof (gint16);
228 frame_size = speexenc->frame_size;
230 if (speexenc->bufsize && (speexenc->bufsize + size >= frame_size)) {
231 memcpy (speexenc->buffer + speexenc->bufsize, data,
232 (frame_size - speexenc->bufsize) * sizeof (gint16));
234 for (i = 0; i < frame_size; i++)
235 input[i] = speexenc->buffer[i];
237 speex_encode (speexenc->state, input, &speexenc->bits);
238 speexenc->packet_count++;
240 if (speexenc->packet_count % speexenc->n_packets == 0) {
243 outbuf = gst_buffer_new_and_alloc (frame_size * speexenc->n_packets);
244 GST_BUFFER_SIZE (outbuf) = speex_bits_write (&speexenc->bits,
245 GST_BUFFER_DATA (outbuf), GST_BUFFER_SIZE (outbuf));
246 GST_BUFFER_TIMESTAMP (outbuf) = speexenc->next_ts;
247 speex_bits_reset (&speexenc->bits);
249 gst_pad_push (speexenc->srcpad, GST_DATA (outbuf));
250 speexenc->next_ts += frame_size * GST_SECOND / speexenc->rate;
253 size -= (speexenc->frame_size - speexenc->bufsize);
254 data += (speexenc->frame_size - speexenc->bufsize);
256 speexenc->bufsize = 0;
259 while (size >= frame_size) {
260 for (i = 0; i < frame_size; i++)
263 speex_encode (speexenc->state, input, &speexenc->bits);
264 speexenc->packet_count++;
266 if (speexenc->packet_count % speexenc->n_packets == 0) {
269 outbuf = gst_buffer_new_and_alloc (frame_size * speexenc->n_packets);
270 GST_BUFFER_SIZE (outbuf) = speex_bits_write (&speexenc->bits,
271 GST_BUFFER_DATA (outbuf), GST_BUFFER_SIZE (outbuf));
272 GST_BUFFER_TIMESTAMP (outbuf) = speexenc->next_ts;
273 speex_bits_reset (&speexenc->bits);
275 gst_pad_push (speexenc->srcpad, GST_DATA (outbuf));
276 speexenc->next_ts += frame_size * GST_SECOND / speexenc->rate;
284 memcpy (speexenc->buffer + speexenc->bufsize, data, size * sizeof (gint16));
285 speexenc->bufsize += size;
288 gst_buffer_unref (buf);