3 * Copyright (c) 2005 INdT.
4 * @author Andre Moreira Magalhaes <andre.magalhaes@indt.org.br>
5 * @author Rob Taylor <robtaylor@fastmail.fm>
6 * @author Philippe Khalaf <burger@speedy.org>
7 * @author Ole André Vadla Ravnås <oleavr@gmail.com>
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Library General Public License for more details.
19 * You should have received a copy of the GNU Library General Public
20 * License along with this library; if not, write to the
21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 * Boston, MA 02111-1307, USA.
31 #include "gstmimdec.h"
33 GST_DEBUG_CATEGORY (mimdec_debug);
34 #define GST_CAT_DEFAULT (mimdec_debug)
36 static GstStaticPadTemplate sink_factory =
37 GST_STATIC_PAD_TEMPLATE (
41 GST_STATIC_CAPS ("video/x-msnmsgr-webcam")
44 static GstStaticPadTemplate src_factory =
45 GST_STATIC_PAD_TEMPLATE (
49 GST_STATIC_CAPS ("video/x-raw-rgb, "
52 "endianness = (int) 4321, "
53 "framerate = (double) [1.0, 30.0], "
54 "red_mask = (int) 16711680, "
55 "green_mask = (int) 65280, "
56 "blue_mask = (int) 255, "
57 "height = (int) [16, 4096], "
58 "width = (int) [16, 4096]"
62 static void gst_mimdec_class_init (GstMimDecClass *klass);
63 static void gst_mimdec_base_init (GstMimDecClass *klass);
64 static void gst_mimdec_init (GstMimDec *mimdec);
65 static void gst_mimdec_finalize (GObject *object);
67 static GstFlowReturn gst_mimdec_chain (GstPad *pad,
69 static GstCaps *gst_mimdec_src_getcaps (GstPad *pad);
71 static GstStateChangeReturn
72 gst_mimdec_change_state (GstElement *element,
73 GstStateChange transition);
75 static GstElementClass *parent_class = NULL;
78 gst_gst_mimdec_get_type (void)
80 static GType plugin_type = 0;
84 static const GTypeInfo plugin_info =
86 sizeof (GstMimDecClass),
87 (GBaseInitFunc) gst_mimdec_base_init,
89 (GClassInitFunc) gst_mimdec_class_init,
94 (GInstanceInitFunc) gst_mimdec_init,
96 plugin_type = g_type_register_static (GST_TYPE_ELEMENT,
104 gst_mimdec_base_init (GstMimDecClass *klass)
106 static GstElementDetails plugin_details = {
108 "Codec/Decoder/Video",
110 "Andre Moreira Magalhaes <andre.magalhaes@indt.org.br>, "
111 "Rob Taylor <robtaylor@fastmail.fm>, "
112 "Philippe Khalaf <burger@speedy.org>, "
113 "Ole André Vadla Ravnås <oleavr@gmail.com>"
115 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
117 gst_element_class_add_pad_template (element_class,
118 gst_static_pad_template_get (&src_factory));
119 gst_element_class_add_pad_template (element_class,
120 gst_static_pad_template_get (&sink_factory));
122 gst_element_class_set_details (element_class, &plugin_details);
126 gst_mimdec_class_init (GstMimDecClass *klass)
128 GObjectClass *gobject_class;
129 GstElementClass *gstelement_class;
131 gobject_class = (GObjectClass*) klass;
132 gstelement_class = (GstElementClass*) klass;
133 gstelement_class->change_state = gst_mimdec_change_state;
135 gobject_class->finalize = gst_mimdec_finalize;
137 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
139 GST_DEBUG_CATEGORY_INIT (mimdec_debug, "mimdec", 0, "Mimic decoder plugin");
143 gst_mimdec_init (GstMimDec *mimdec)
145 mimdec->sinkpad = gst_pad_new_from_template (
146 gst_static_pad_template_get (&sink_factory), "sink");
147 gst_element_add_pad (GST_ELEMENT (mimdec), mimdec->sinkpad);
148 gst_pad_set_chain_function (mimdec->sinkpad, gst_mimdec_chain);
150 mimdec->srcpad = gst_pad_new_from_template (
151 gst_static_pad_template_get (&src_factory), "src");
152 gst_pad_set_getcaps_function (mimdec->srcpad, gst_mimdec_src_getcaps);
153 gst_element_add_pad (GST_ELEMENT (mimdec), mimdec->srcpad);
155 mimdec->adapter = gst_adapter_new ();
158 mimdec->buffer_size = -1;
159 mimdec->have_header = FALSE;
160 mimdec->payload_size = -1;
161 mimdec->last_ts = -1;
162 mimdec->current_ts = -1;
163 mimdec->gst_timestamp = -1;
167 gst_mimdec_finalize (GObject *object)
169 GstMimDec *mimdec = GST_MIMDEC (object);
171 gst_adapter_clear (mimdec->adapter);
172 g_object_unref (mimdec->adapter);
176 gst_mimdec_chain (GstPad *pad, GstBuffer *in)
179 GstBuffer *out_buf, *buf;
180 guchar *header, *frame_body;
185 GstFlowReturn res = GST_FLOW_OK;
187 GST_DEBUG ("in gst_mimdec_chain");
189 g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
191 mimdec = GST_MIMDEC (gst_pad_get_parent (pad));
192 g_return_val_if_fail (GST_IS_MIMDEC (mimdec), GST_FLOW_ERROR);
194 g_return_val_if_fail(GST_PAD_IS_LINKED(mimdec->srcpad), GST_FLOW_ERROR);
196 buf = GST_BUFFER (in);
197 gst_adapter_push (mimdec->adapter, buf);
200 if (mimdec->gst_timestamp == -1) {
202 GstClockTime base_time;
204 base_time = gst_element_get_base_time (GST_ELEMENT (mimdec));
206 clock = gst_element_get_clock (GST_ELEMENT (mimdec));
208 mimdec->gst_timestamp = gst_clock_get_time (clock) - base_time;
209 gst_object_unref (clock);
214 // do we have enough bytes to read a header
215 while (gst_adapter_available (mimdec->adapter) >= (mimdec->have_header ? mimdec->payload_size : 24)) {
216 if (!mimdec->have_header) {
217 header = (guchar *) gst_adapter_peek (mimdec->adapter, 24);
218 header_size = GUINT16_FROM_LE (*(guint16 *) (header + 0));
219 if (header_size != 24) {
220 GST_WARNING_OBJECT (mimdec,
221 "invalid frame: header size %d incorrect", header_size);
222 gst_adapter_flush (mimdec->adapter, 24);
223 res = GST_FLOW_ERROR;
227 fourcc = GST_MAKE_FOURCC ('M', 'L', '2', '0');
228 if (GUINT32_FROM_LE (*((guint32 *) (header + 12))) != fourcc) {
229 GST_WARNING_OBJECT (mimdec, "invalid frame: unknown FOURCC code %d", fourcc);
230 gst_adapter_flush (mimdec->adapter, 24);
231 res = GST_FLOW_ERROR;
235 mimdec->payload_size = GUINT32_FROM_LE (*((guint32 *) (header + 8)));
236 GST_DEBUG ("Got packet, payload size %d", mimdec->payload_size);
238 gst_adapter_flush (mimdec->adapter, 24);
240 mimdec->have_header = TRUE;
243 if (gst_adapter_available (mimdec->adapter) < mimdec->payload_size)
248 frame_body = (guchar *) gst_adapter_peek (mimdec->adapter, mimdec->payload_size);
250 if (mimdec->dec == NULL) {
255 mimdec->dec = mimic_open ();
256 if (mimdec->dec == NULL) {
257 GST_WARNING_OBJECT (mimdec, "mimic_open error\n");
259 gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
260 mimdec->have_header = FALSE;
261 res = GST_FLOW_ERROR;
265 if (!mimic_decoder_init (mimdec->dec, frame_body)) {
266 GST_WARNING_OBJECT (mimdec, "mimic_decoder_init error\n");
267 mimic_close (mimdec->dec);
270 gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
271 mimdec->have_header = FALSE;
272 res = GST_FLOW_ERROR;
276 if (!mimic_get_property (mimdec->dec, "buffer_size", &mimdec->buffer_size)) {
277 GST_WARNING_OBJECT (mimdec,
278 "mimic_get_property('buffer_size') error\n");
279 mimic_close (mimdec->dec);
282 gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
283 mimdec->have_header = FALSE;
284 res = GST_FLOW_ERROR;
288 gst_segment_init (&segment, GST_FORMAT_TIME);
289 event = gst_event_new_new_segment (FALSE, segment.rate,
290 segment.format, segment.start, segment.stop, segment.time);
292 result = gst_pad_push_event (mimdec->srcpad, event);
295 GST_WARNING_OBJECT (mimdec, "gst_pad_push_event failed");
296 res = GST_FLOW_ERROR;
301 out_buf = gst_buffer_new_and_alloc (mimdec->buffer_size);
302 GST_BUFFER_TIMESTAMP(out_buf) = GST_BUFFER_TIMESTAMP(buf);
303 if (!mimic_decode_frame (mimdec->dec, frame_body, GST_BUFFER_DATA (out_buf))) {
304 GST_WARNING_OBJECT (mimdec, "mimic_decode_frame error\n");
306 gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
307 mimdec->have_header = FALSE;
309 gst_buffer_unref (out_buf);
310 res = GST_FLOW_ERROR;
314 mimic_get_property(mimdec->dec, "width", &width);
315 mimic_get_property(mimdec->dec, "height", &height);
316 GST_DEBUG_OBJECT (mimdec,
317 "got WxH %d x %d payload size %d buffer_size %d",
318 width, height, mimdec->payload_size, mimdec->buffer_size);
319 caps = gst_caps_new_simple ("video/x-raw-rgb",
320 "bpp", G_TYPE_INT, 24,
321 "depth", G_TYPE_INT, 24,
322 "endianness", G_TYPE_INT, 4321,
323 "framerate", G_TYPE_DOUBLE, 30.0,
324 "red_mask", G_TYPE_INT, 16711680,
325 "green_mask", G_TYPE_INT, 65280,
326 "blue_mask", G_TYPE_INT, 255,
327 "width", G_TYPE_INT, width,
328 "height", G_TYPE_INT, height, NULL);
329 gst_buffer_set_caps (out_buf, caps);
330 gst_caps_unref (caps);
331 res = gst_pad_push (mimdec->srcpad, out_buf);
333 gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
334 mimdec->have_header = FALSE;
338 gst_object_unref (mimdec);
343 static GstStateChangeReturn
344 gst_mimdec_change_state (GstElement *element, GstStateChange transition)
348 switch (transition) {
349 case GST_STATE_CHANGE_READY_TO_NULL:
350 mimdec = GST_MIMDEC (element);
351 if (mimdec->dec != NULL) {
352 mimic_close (mimdec->dec);
354 mimdec->buffer_size = -1;
355 mimdec->have_header = FALSE;
356 mimdec->payload_size = -1;
363 return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
367 gst_mimdec_src_getcaps (GstPad *pad)
371 if (!(caps = GST_PAD_CAPS (pad)))
372 caps = (GstCaps *) gst_pad_get_pad_template_caps (pad);
373 caps = gst_caps_ref (caps);