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 = (fraction) [ 0/1, 30/1 ], "
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_finalize (GObject *object);
64 static GstFlowReturn gst_mimdec_chain (GstPad *pad,
66 static GstCaps *gst_mimdec_src_getcaps (GstPad *pad);
68 static GstStateChangeReturn
69 gst_mimdec_change_state (GstElement *element,
70 GstStateChange transition);
73 GST_BOILERPLATE (GstMimDec, gst_mimdec, GstElement, GST_TYPE_ELEMENT);
76 gst_mimdec_base_init (gpointer klass)
78 static GstElementDetails plugin_details = {
80 "Codec/Decoder/Video",
82 "Andre Moreira Magalhaes <andre.magalhaes@indt.org.br>, "
83 "Rob Taylor <robtaylor@fastmail.fm>, "
84 "Philippe Khalaf <burger@speedy.org>, "
85 "Ole André Vadla Ravnås <oleavr@gmail.com>"
87 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
89 gst_element_class_add_pad_template (element_class,
90 gst_static_pad_template_get (&src_factory));
91 gst_element_class_add_pad_template (element_class,
92 gst_static_pad_template_get (&sink_factory));
94 gst_element_class_set_details (element_class, &plugin_details);
98 gst_mimdec_class_init (GstMimDecClass *klass)
100 GObjectClass *gobject_class;
101 GstElementClass *gstelement_class;
103 gobject_class = (GObjectClass*) klass;
104 gstelement_class = (GstElementClass*) klass;
105 gstelement_class->change_state = gst_mimdec_change_state;
107 gobject_class->finalize = gst_mimdec_finalize;
109 GST_DEBUG_CATEGORY_INIT (mimdec_debug, "mimdec", 0, "Mimic decoder plugin");
113 gst_mimdec_init (GstMimDec *mimdec, GstMimDecClass *klass)
115 mimdec->sinkpad = gst_pad_new_from_template (
116 gst_static_pad_template_get (&sink_factory), "sink");
117 gst_element_add_pad (GST_ELEMENT (mimdec), mimdec->sinkpad);
118 gst_pad_set_chain_function (mimdec->sinkpad, gst_mimdec_chain);
120 mimdec->srcpad = gst_pad_new_from_template (
121 gst_static_pad_template_get (&src_factory), "src");
122 gst_pad_set_getcaps_function (mimdec->srcpad, gst_mimdec_src_getcaps);
123 gst_element_add_pad (GST_ELEMENT (mimdec), mimdec->srcpad);
125 mimdec->adapter = gst_adapter_new ();
128 mimdec->buffer_size = -1;
129 mimdec->have_header = FALSE;
130 mimdec->payload_size = -1;
131 mimdec->last_ts = -1;
132 mimdec->current_ts = -1;
133 mimdec->gst_timestamp = -1;
137 gst_mimdec_finalize (GObject *object)
139 GstMimDec *mimdec = GST_MIMDEC (object);
141 gst_adapter_clear (mimdec->adapter);
142 g_object_unref (mimdec->adapter);
146 gst_mimdec_chain (GstPad *pad, GstBuffer *in)
149 GstBuffer *out_buf, *buf;
150 guchar *header, *frame_body;
155 GstFlowReturn res = GST_FLOW_OK;
157 GST_DEBUG ("in gst_mimdec_chain");
159 g_return_val_if_fail (GST_IS_PAD (pad), GST_FLOW_ERROR);
161 mimdec = GST_MIMDEC (gst_pad_get_parent (pad));
162 g_return_val_if_fail (GST_IS_MIMDEC (mimdec), GST_FLOW_ERROR);
164 g_return_val_if_fail(GST_PAD_IS_LINKED(mimdec->srcpad), GST_FLOW_ERROR);
166 buf = GST_BUFFER (in);
167 gst_adapter_push (mimdec->adapter, buf);
170 if (mimdec->gst_timestamp == -1) {
172 GstClockTime base_time;
174 base_time = gst_element_get_base_time (GST_ELEMENT (mimdec));
176 clock = gst_element_get_clock (GST_ELEMENT (mimdec));
178 mimdec->gst_timestamp = gst_clock_get_time (clock) - base_time;
179 gst_object_unref (clock);
184 // do we have enough bytes to read a header
185 while (gst_adapter_available (mimdec->adapter) >= (mimdec->have_header ? mimdec->payload_size : 24)) {
186 if (!mimdec->have_header) {
187 header = (guchar *) gst_adapter_peek (mimdec->adapter, 24);
188 header_size = GUINT16_FROM_LE (*(guint16 *) (header + 0));
189 if (header_size != 24) {
190 GST_WARNING_OBJECT (mimdec,
191 "invalid frame: header size %d incorrect", header_size);
192 gst_adapter_flush (mimdec->adapter, 24);
193 res = GST_FLOW_ERROR;
197 fourcc = GST_MAKE_FOURCC ('M', 'L', '2', '0');
198 if (GUINT32_FROM_LE (*((guint32 *) (header + 12))) != fourcc) {
199 GST_WARNING_OBJECT (mimdec, "invalid frame: unknown FOURCC code %d", fourcc);
200 gst_adapter_flush (mimdec->adapter, 24);
201 res = GST_FLOW_ERROR;
205 mimdec->payload_size = GUINT32_FROM_LE (*((guint32 *) (header + 8)));
207 mimdec->current_ts = GUINT32_FROM_LE (*((guint32 *) (header + 20)));
209 GST_DEBUG ("Got packet, payload size %d", mimdec->payload_size);
211 gst_adapter_flush (mimdec->adapter, 24);
213 mimdec->have_header = TRUE;
216 if (gst_adapter_available (mimdec->adapter) < mimdec->payload_size)
221 frame_body = (guchar *) gst_adapter_peek (mimdec->adapter, mimdec->payload_size);
223 if (mimdec->dec == NULL) {
227 mimdec->dec = mimic_open ();
228 if (mimdec->dec == NULL) {
229 GST_WARNING_OBJECT (mimdec, "mimic_open error\n");
231 gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
232 mimdec->have_header = FALSE;
233 res = GST_FLOW_ERROR;
237 if (!mimic_decoder_init (mimdec->dec, frame_body)) {
238 GST_WARNING_OBJECT (mimdec, "mimic_decoder_init error\n");
239 mimic_close (mimdec->dec);
242 gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
243 mimdec->have_header = FALSE;
244 res = GST_FLOW_ERROR;
248 if (!mimic_get_property (mimdec->dec, "buffer_size", &mimdec->buffer_size)) {
249 GST_WARNING_OBJECT (mimdec,
250 "mimic_get_property('buffer_size') error\n");
251 mimic_close (mimdec->dec);
254 gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
255 mimdec->have_header = FALSE;
256 res = GST_FLOW_ERROR;
260 event = gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME,
262 result = gst_pad_push_event (mimdec->srcpad, event);
265 GST_WARNING_OBJECT (mimdec, "gst_pad_push_event failed");
266 res = GST_FLOW_ERROR;
271 out_buf = gst_buffer_new_and_alloc (mimdec->buffer_size);
273 if (!mimic_decode_frame (mimdec->dec, frame_body, GST_BUFFER_DATA (out_buf))) {
274 GST_WARNING_OBJECT (mimdec, "mimic_decode_frame error\n");
276 gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
277 mimdec->have_header = FALSE;
279 gst_buffer_unref (out_buf);
280 res = GST_FLOW_ERROR;
284 if (mimdec->last_ts != -1) {
285 int diff = mimdec->current_ts - mimdec->last_ts;
286 if (diff < 0 || diff > 5000) {
289 mimdec->gst_timestamp += diff * GST_MSECOND;
291 GST_BUFFER_TIMESTAMP(out_buf) = mimdec->gst_timestamp;
292 mimdec->last_ts = mimdec->current_ts;
295 mimic_get_property(mimdec->dec, "width", &width);
296 mimic_get_property(mimdec->dec, "height", &height);
297 GST_DEBUG_OBJECT (mimdec,
298 "got WxH %d x %d payload size %d buffer_size %d",
299 width, height, mimdec->payload_size, mimdec->buffer_size);
300 caps = gst_caps_new_simple ("video/x-raw-rgb",
301 "bpp", G_TYPE_INT, 24,
302 "depth", G_TYPE_INT, 24,
303 "endianness", G_TYPE_INT, 4321,
304 "framerate", GST_TYPE_FRACTION, 7, 1,
305 "red_mask", G_TYPE_INT, 16711680,
306 "green_mask", G_TYPE_INT, 65280,
307 "blue_mask", G_TYPE_INT, 255,
308 "width", G_TYPE_INT, width,
309 "height", G_TYPE_INT, height, NULL);
310 gst_buffer_set_caps (out_buf, caps);
311 gst_caps_unref (caps);
312 res = gst_pad_push (mimdec->srcpad, out_buf);
314 gst_adapter_flush (mimdec->adapter, mimdec->payload_size);
315 mimdec->have_header = FALSE;
319 gst_object_unref (mimdec);
324 static GstStateChangeReturn
325 gst_mimdec_change_state (GstElement *element, GstStateChange transition)
329 switch (transition) {
330 case GST_STATE_CHANGE_READY_TO_NULL:
331 mimdec = GST_MIMDEC (element);
332 if (mimdec->dec != NULL) {
333 mimic_close (mimdec->dec);
335 mimdec->buffer_size = -1;
336 mimdec->have_header = FALSE;
337 mimdec->payload_size = -1;
338 mimdec->gst_timestamp = -1;
339 mimdec->current_ts = -1;
340 mimdec->last_ts = -1;
347 return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
351 gst_mimdec_src_getcaps (GstPad *pad)
355 if (!(caps = GST_PAD_CAPS (pad)))
356 caps = (GstCaps *) gst_pad_get_pad_template_caps (pad);
357 caps = gst_caps_ref (caps);