2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * <2000> Daniel Fischer <dan@f3c.com>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
26 #include "gstdv1394src.h"
28 #define N_BUFFERS_IN_POOL 3
30 #define PAL_FRAMESIZE 144000
31 #define NTSC_FRAMESIZE 120000
33 /* Filter signals and args */
48 static GstElementDetails gst_dv1394src_details =
49 GST_ELEMENT_DETAILS ("Firewire (1394) DV Source",
51 "Source for DV video data from firewire port",
52 "Erik Walthinsen <omega@temple-baptist.com>\n"
53 "Daniel Fischer <dan@f3c.com>");
56 static GstPadTemplate *
57 gst_dv1394src_factory (void)
59 static GstPadTemplate *template = NULL;
62 template = gst_pad_template_new ("src",
65 GST_STATIC_CAPS ("dv1394src",
67 gst_props_new ("format", GST_PROPS_LIST (G_TYPE_STRING ("NTSC"),
76 static void gst_dv1394src_base_init (gpointer g_class);
77 static void gst_dv1394src_class_init (GstDV1394SrcClass * klass);
78 static void gst_dv1394src_init (GstDV1394Src * filter);
80 static void gst_dv1394src_set_property (GObject * object, guint prop_id,
81 const GValue * value, GParamSpec * pspec);
82 static void gst_dv1394src_get_property (GObject * object, guint prop_id,
83 GValue * value, GParamSpec * pspec);
85 static GstElementStateReturn gst_dv1394src_change_state (GstElement * element);
87 static GstData *gst_dv1394src_get (GstPad * pad);
89 static GstElementClass *parent_class = NULL;
91 /*static guint gst_filter_signals[LAST_SIGNAL] = { 0 }; */
94 gst_dv1394src_get_type (void)
96 static GType gst_dv1394src_type = 0;
98 if (!gst_dv1394src_type) {
99 static const GTypeInfo gst_dv1394src_info = {
100 sizeof (GstDV1394Src),
101 gst_dv1394src_base_init,
103 (GClassInitFunc) gst_dv1394src_class_init,
106 sizeof (GstDV1394Src),
108 (GInstanceInitFunc) gst_dv1394src_init,
111 g_type_register_static (GST_TYPE_ELEMENT, "DV1394Src",
112 &gst_dv1394src_info, 0);
114 return gst_dv1394src_type;
118 gst_dv1394src_base_init (gpointer g_class)
120 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
122 gst_element_class_set_details (element_class, &gst_dv1394src_details);
126 gst_dv1394src_class_init (GstDV1394SrcClass * klass)
128 GObjectClass *gobject_class;
129 GstElementClass *gstelement_class;
131 gobject_class = (GObjectClass *) klass;
132 gstelement_class = (GstElementClass *) klass;
134 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CONSECUTIVE,
135 g_param_spec_int ("consecutive", "consecutive frames",
136 "send n consecutive frames after skipping", 1, G_MAXINT, 1,
138 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SKIP,
139 g_param_spec_int ("skip", "skip frames", "skip n frames", 0, G_MAXINT, 1,
141 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DROP_INCOMPLETE,
142 g_param_spec_boolean ("drop_incomplete", "drop_incomplete",
143 "drop incomplete frames", TRUE, G_PARAM_READWRITE));
145 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
147 gobject_class->set_property = gst_dv1394src_set_property;
148 gobject_class->get_property = gst_dv1394src_get_property;
150 gstelement_class->change_state = gst_dv1394src_change_state;
154 gst_dv1394src_init (GstDV1394Src * dv1394src)
156 dv1394src->srcpad = gst_pad_new ("src", GST_PAD_SRC);
157 gst_pad_set_get_function (dv1394src->srcpad, gst_dv1394src_get);
158 gst_element_add_pad (GST_ELEMENT (dv1394src), dv1394src->srcpad);
162 dv1394src->channel = 63;
164 dv1394src->consecutive = 1;
166 dv1394src->drop_incomplete = TRUE;
168 /* initialized when first header received */
169 dv1394src->frameSize = 0;
171 dv1394src->buf = NULL;
172 dv1394src->frame = NULL;
173 dv1394src->frameSequence = 0;
177 gst_dv1394src_set_property (GObject * object, guint prop_id,
178 const GValue * value, GParamSpec * pspec)
180 GstDV1394Src *filter;
182 /* it's not null if we got it, but it might not be ours */
183 g_return_if_fail (GST_IS_DV1394SRC (object));
184 filter = GST_DV1394SRC (object);
188 filter->skip = g_value_get_int (value);
190 case ARG_CONSECUTIVE:
191 filter->consecutive = g_value_get_int (value);
193 case ARG_DROP_INCOMPLETE:
194 filter->drop_incomplete = g_value_get_boolean (value);
202 gst_dv1394src_get_property (GObject * object, guint prop_id, GValue * value,
205 GstDV1394Src *filter;
207 /* it's not null if we got it, but it might not be ours */
208 g_return_if_fail (GST_IS_DV1394SRC (object));
209 filter = GST_DV1394SRC (object);
213 g_value_set_int (value, filter->skip);
215 case ARG_CONSECUTIVE:
216 g_value_set_int (value, filter->consecutive);
218 case ARG_DROP_INCOMPLETE:
219 g_value_set_boolean (value, filter->drop_incomplete);
222 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
228 gst_dv1394src_iso_receive (raw1394handle_t handle, int channel, size_t len,
231 GstDV1394Src *dv1394src = GST_DV1394SRC (raw1394_get_userdata (handle));
235 the following code taken from kino-0.51 (Dan Dennedy/Charles Yates)
237 unsigned char *p = (unsigned char *) &data[3];
238 int section_type = p[0] >> 5; /* section type is in bits 5 - 7 */
239 int dif_sequence = p[1] >> 4; /* dif sequence number is in bits 4 - 7 */
240 int dif_block = p[2];
242 /* if we are at the beginning of a frame,
243 we set buf=frame, and alloc a new buffer for frame
246 if (section_type == 0 && dif_sequence == 0) { // dif header
248 if (!dv1394src->negotiated) {
249 // figure format (NTSC/PAL)
252 dv1394src->frameSize = PAL_FRAMESIZE;
253 GST_DEBUG ("PAL data");
254 if (gst_pad_try_set_caps (dv1394src->srcpad,
255 gst_caps_new_simple ("video/dv",
256 "format", G_TYPE_STRING, "PAL", NULL)) <= 0) {
257 GST_ELEMENT_ERROR (dv1394src, CORE, NEGOTIATION, (NULL),
258 ("Could not set source caps for PAL"));
263 dv1394src->frameSize = NTSC_FRAMESIZE;
265 ("NTSC data [untested] - please report success/failure to <dan@f3c.com>");
266 if (gst_pad_try_set_caps (dv1394src->srcpad,
267 gst_caps_new_simple ("video/dv", "format", G_TYPE_STRING,
268 "NTSC", NULL)) <= 0) {
269 GST_ELEMENT_ERROR (dv1394src, CORE, NEGOTIATION, (NULL),
270 ("Could not set source caps for NTSC"));
274 dv1394src->negotiated = TRUE;
276 // drop last frame when not complete
277 if (!dv1394src->drop_incomplete
278 || dv1394src->bytesInFrame == dv1394src->frameSize) {
279 dv1394src->buf = dv1394src->frame;
281 GST_INFO_OBJECT (GST_ELEMENT (dv1394src), "incomplete frame dropped");
283 dv1394src->frame = NULL;
285 dv1394src->frameSequence++;
287 if (dv1394src->frameSequence % (dv1394src->skip +
288 dv1394src->consecutive) < dv1394src->consecutive) {
289 dv1394src->frame = gst_buffer_new_and_alloc (dv1394src->frameSize);
291 dv1394src->bytesInFrame = 0;
294 if (dv1394src->frame != NULL) {
295 void *data = GST_BUFFER_DATA (dv1394src->frame);
298 switch (section_type) {
299 case 0: /* 1 Header block */
300 /* p[3] |= 0x80; // hack to force PAL data */
301 memcpy (data + dif_sequence * 150 * 80, p, 480);
304 case 1: /* 2 Subcode blocks */
305 memcpy (data + dif_sequence * 150 * 80 + (1 + dif_block) * 80, p,
309 case 2: /* 3 VAUX blocks */
310 memcpy (data + dif_sequence * 150 * 80 + (3 + dif_block) * 80, p,
314 case 3: /* 9 Audio blocks interleaved with video */
315 memcpy (data + dif_sequence * 150 * 80 + (6 + dif_block * 16) * 80, p,
319 case 4: /* 135 Video blocks interleaved with audio */
320 memcpy (data + dif_sequence * 150 * 80 + (7 + (dif_block / 15) +
321 dif_block) * 80, p, 480);
324 default: /* we canĀ“t handle any other data */
327 dv1394src->bytesInFrame += 480;
335 gst_dv1394src_bus_reset (raw1394handle_t handle, unsigned int generation)
337 GST_INFO_OBJECT (GST_DV1394SRC (raw1394_get_userdata (handle)),
343 gst_dv1394src_get (GstPad * pad)
345 GstDV1394Src *dv1394src = GST_DV1394SRC (GST_PAD_PARENT (pad));
347 dv1394src->buf = NULL;
348 while (dv1394src->buf == NULL)
349 raw1394_loop_iterate (dv1394src->handle);
351 return GST_DATA (dv1394src->buf);
354 static GstElementStateReturn
355 gst_dv1394src_change_state (GstElement * element)
357 GstDV1394Src *dv1394src;
359 g_return_val_if_fail (GST_IS_DV1394SRC (element), GST_STATE_FAILURE);
360 dv1394src = GST_DV1394SRC (element);
362 switch (GST_STATE_TRANSITION (element)) {
363 case GST_STATE_NULL_TO_READY:
364 if ((dv1394src->handle = raw1394_new_handle ()) == NULL) {
365 GST_INFO_OBJECT (dv1394src, "can't get raw1394 handle");
366 return GST_STATE_FAILURE;
368 raw1394_set_userdata (dv1394src->handle, dv1394src);
369 dv1394src->numcards =
370 raw1394_get_port_info (dv1394src->handle, dv1394src->pinfo, 16);
371 if (dv1394src->numcards == 0) {
372 GST_INFO_OBJECT (dv1394src, "no cards available for raw1394");
373 return GST_STATE_FAILURE;
375 if (dv1394src->pinfo[dv1394src->card].nodes <= 1) {
376 GST_INFO_OBJECT (dv1394src, "there are no nodes on the 1394 bus");
377 return GST_STATE_FAILURE;
379 if (raw1394_set_port (dv1394src->handle, dv1394src->port) < 0) {
380 GST_INFO_OBJECT (dv1394src, "can't set 1394 port %d", dv1394src->port);
381 return GST_STATE_FAILURE;
383 raw1394_set_iso_handler (dv1394src->handle, dv1394src->channel,
384 gst_dv1394src_iso_receive);
385 raw1394_set_bus_reset_handler (dv1394src->handle,
386 gst_dv1394src_bus_reset);
387 dv1394src->started = FALSE;
388 GST_DEBUG ("successfully opened up 1394 connection");
390 case GST_STATE_PAUSED_TO_PLAYING:
391 if (raw1394_start_iso_rcv (dv1394src->handle, dv1394src->channel) < 0) {
392 GST_INFO_OBJECT (dv1394src, "can't start 1394 iso receive");
393 return GST_STATE_FAILURE;
396 case GST_STATE_PLAYING_TO_PAUSED:
397 raw1394_stop_iso_rcv (dv1394src->handle, dv1394src->channel);
399 case GST_STATE_READY_TO_NULL:
400 raw1394_destroy_handle (dv1394src->handle);
406 /* if we haven't failed already, give the parent class a chance to ;-) */
407 if (GST_ELEMENT_CLASS (parent_class)->change_state)
408 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
410 return GST_STATE_SUCCESS;