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,
81 g_type_register_static (GST_TYPE_ELEMENT, "GstSpeexEnc", &speexenc_info,
87 static GstStaticPadTemplate speex_sink_template =
88 GST_STATIC_PAD_TEMPLATE ("sink",
91 GST_STATIC_CAPS ("audio/x-raw-int, "
92 "endianness = (int) BYTE_ORDER, "
93 "signed = (boolean) true, "
96 "rate = (int) [ 1000, 48000 ], " "channels = (int) 1")
99 static GstStaticPadTemplate speex_src_template = GST_STATIC_PAD_TEMPLATE ("src",
102 GST_STATIC_CAPS ("audio/x-speex, "
103 "rate = (int) [ 1000, 48000 ], " "channels = (int) 1")
107 gst_speexenc_base_init (gpointer g_class)
109 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
111 gst_element_class_add_pad_template (element_class,
112 gst_static_pad_template_get (&speex_sink_template));
113 gst_element_class_add_pad_template (element_class,
114 gst_static_pad_template_get (&speex_src_template));
116 gst_element_class_set_details (element_class, &gst_speexenc_details);
120 gst_speexenc_class_init (GstSpeexEnc * klass)
122 GObjectClass *gobject_class;
123 GstElementClass *gstelement_class;
125 gobject_class = (GObjectClass *) klass;
126 gstelement_class = (GstElementClass *) klass;
128 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
130 gst_speexenc_signals[FRAME_ENCODED] =
131 g_signal_new ("frame-encoded", G_TYPE_FROM_CLASS (klass),
132 G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstSpeexEncClass, frame_encoded),
133 NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
138 gst_speexenc_init (GstSpeexEnc * speexenc)
140 /* create the sink and src pads */
142 gst_pad_new_from_template (speexenc_sink_template, "sink");
143 gst_element_add_pad (GST_ELEMENT (speexenc), speexenc->sinkpad);
144 gst_pad_set_chain_function (speexenc->sinkpad, gst_speexenc_chain);
145 gst_pad_set_link_function (speexenc->sinkpad, gst_speexenc_sinkconnect);
147 speexenc->srcpad = gst_pad_new_from_template (speexenc_src_template, "src");
148 gst_element_add_pad (GST_ELEMENT (speexenc), speexenc->srcpad);
150 speex_bits_init (&speexenc->bits);
151 speexenc->mode = &speex_nb_mode;
152 speexenc->bufsize = 0;
153 speexenc->packet_count = 0;
154 speexenc->n_packets = 20;
157 static GstPadLinkReturn
158 gst_speexenc_sinkconnect (GstPad * pad, const GstCaps * caps)
160 GstSpeexEnc *speexenc;
161 GstStructure *structure;
163 speexenc = GST_SPEEXENC (gst_pad_get_parent (pad));
165 structure = gst_caps_get_structure (caps, 0);
166 gst_structure_get_int (structure, "rate", &speexenc->rate);
167 if (gst_pad_try_set_caps (speexenc->srcpad,
168 gst_caps_new_simple ("audio/x-speex",
169 "rate", G_TYPE_INT, speexenc->rate,
170 "channels", G_TYPE_INT, 1, NULL))) {
171 speex_init_header (&speexenc->header, speexenc->rate, 1, speexenc->mode);
172 speexenc->header.frames_per_packet = speexenc->n_packets;
174 speexenc->state = speex_encoder_init (speexenc->mode);
175 speex_encoder_ctl (speexenc->state, SPEEX_GET_FRAME_SIZE,
176 &speexenc->frame_size);
178 return GST_PAD_LINK_OK;
180 return GST_PAD_LINK_REFUSED;
185 gst_speexenc_chain (GstPad * pad, GstData * _data)
187 GstBuffer *buf = GST_BUFFER (_data);
188 GstSpeexEnc *speexenc;
197 g_return_if_fail (pad != NULL);
198 g_return_if_fail (GST_IS_PAD (pad));
199 g_return_if_fail (buf != NULL);
201 speexenc = GST_SPEEXENC (GST_OBJECT_PARENT (pad));
203 if (!GST_PAD_CAPS (speexenc->srcpad)) {
205 if (!gst_pad_try_set_caps (speexenc->srcpad,
206 gst_caps_new_simple ("audio/x-speex",
207 "rate", G_TYPE_INT, speexenc->rate,
208 "channels", G_TYPE_INT, 1, NULL))) {
209 GST_ELEMENT_ERROR (speexenc, CORE, NEGOTIATION, (NULL), (NULL));
214 if (speexenc->packet_count == 0) {
215 header_data = speex_header_to_packet (&speexenc->header, &size);
217 outbuf = gst_buffer_new ();
218 GST_BUFFER_DATA (outbuf) = header_data;
219 GST_BUFFER_SIZE (outbuf) = size;
221 gst_pad_push (speexenc->srcpad, GST_DATA (outbuf));
224 data = (gint16 *) GST_BUFFER_DATA (buf);
225 size = GST_BUFFER_SIZE (buf) / sizeof (gint16);
227 frame_size = speexenc->frame_size;
229 if (speexenc->bufsize && (speexenc->bufsize + size >= frame_size)) {
230 memcpy (speexenc->buffer + speexenc->bufsize, data,
231 (frame_size - speexenc->bufsize) * sizeof (gint16));
233 for (i = 0; i < frame_size; i++)
234 input[i] = speexenc->buffer[i];
236 speex_encode (speexenc->state, input, &speexenc->bits);
237 speexenc->packet_count++;
239 if (speexenc->packet_count % speexenc->n_packets == 0) {
242 outbuf = gst_buffer_new_and_alloc (frame_size * speexenc->n_packets);
243 GST_BUFFER_SIZE (outbuf) = speex_bits_write (&speexenc->bits,
244 GST_BUFFER_DATA (outbuf), GST_BUFFER_SIZE (outbuf));
245 GST_BUFFER_TIMESTAMP (outbuf) = speexenc->next_ts;
246 speex_bits_reset (&speexenc->bits);
248 gst_pad_push (speexenc->srcpad, GST_DATA (outbuf));
249 speexenc->next_ts += frame_size * GST_SECOND / speexenc->rate;
252 size -= (speexenc->frame_size - speexenc->bufsize);
253 data += (speexenc->frame_size - speexenc->bufsize);
255 speexenc->bufsize = 0;
258 while (size >= frame_size) {
259 for (i = 0; i < frame_size; i++)
262 speex_encode (speexenc->state, input, &speexenc->bits);
263 speexenc->packet_count++;
265 if (speexenc->packet_count % speexenc->n_packets == 0) {
268 outbuf = gst_buffer_new_and_alloc (frame_size * speexenc->n_packets);
269 GST_BUFFER_SIZE (outbuf) = speex_bits_write (&speexenc->bits,
270 GST_BUFFER_DATA (outbuf), GST_BUFFER_SIZE (outbuf));
271 GST_BUFFER_TIMESTAMP (outbuf) = speexenc->next_ts;
272 speex_bits_reset (&speexenc->bits);
274 gst_pad_push (speexenc->srcpad, GST_DATA (outbuf));
275 speexenc->next_ts += frame_size * GST_SECOND / speexenc->rate;
283 memcpy (speexenc->buffer + speexenc->bufsize, data, size * sizeof (gint16));
284 speexenc->bufsize += size;
287 gst_buffer_unref (buf);