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 */
46 static GstElementDetails gst_dv1394src_details = GST_ELEMENT_DETAILS (
47 "Firewire (1394) DV Source",
49 "Source for DV video data from firewire port",
50 "Erik Walthinsen <omega@temple-baptist.com>\n"
51 "Daniel Fischer <dan@f3c.com>"
55 static GstPadTemplate*
56 gst_dv1394src_factory (void)
58 static GstPadTemplate *template = NULL;
61 template = gst_pad_template_new (
69 "format", GST_PROPS_LIST (
70 G_TYPE_STRING ("NTSC"),
81 static void gst_dv1394src_base_init (gpointer g_class);
82 static void gst_dv1394src_class_init (GstDV1394SrcClass *klass);
83 static void gst_dv1394src_init (GstDV1394Src *filter);
85 static void gst_dv1394src_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
86 static void gst_dv1394src_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
88 static GstElementStateReturn gst_dv1394src_change_state (GstElement *element);
90 static GstData * gst_dv1394src_get (GstPad *pad);
92 static GstElementClass *parent_class = NULL;
93 /*static guint gst_filter_signals[LAST_SIGNAL] = { 0 }; */
96 gst_dv1394src_get_type(void) {
97 static GType gst_dv1394src_type = 0;
99 if (!gst_dv1394src_type) {
100 static const GTypeInfo gst_dv1394src_info = {
101 sizeof(GstDV1394Src),
102 gst_dv1394src_base_init,
104 (GClassInitFunc)gst_dv1394src_class_init,
107 sizeof(GstDV1394Src),
109 (GInstanceInitFunc)gst_dv1394src_init,
111 gst_dv1394src_type = g_type_register_static(GST_TYPE_ELEMENT, "DV1394Src", &gst_dv1394src_info, 0);
113 return gst_dv1394src_type;
117 gst_dv1394src_base_init (gpointer g_class)
119 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
121 gst_element_class_set_details (element_class, &gst_dv1394src_details);
125 gst_dv1394src_class_init (GstDV1394SrcClass *klass)
127 GObjectClass *gobject_class;
128 GstElementClass *gstelement_class;
130 gobject_class = (GObjectClass*)klass;
131 gstelement_class = (GstElementClass*)klass;
133 g_object_class_install_property( G_OBJECT_CLASS(klass), ARG_CONSECUTIVE,
134 g_param_spec_int("consecutive","consecutive frames","send n consecutive frames after skipping",
135 1, G_MAXINT,1,G_PARAM_READWRITE));
136 g_object_class_install_property( G_OBJECT_CLASS(klass), ARG_SKIP,
137 g_param_spec_int("skip","skip frames","skip n frames",
138 0, G_MAXINT,1,G_PARAM_READWRITE));
139 g_object_class_install_property( G_OBJECT_CLASS(klass), ARG_DROP_INCOMPLETE,
140 g_param_spec_boolean("drop_incomplete","drop_incomplete","drop incomplete frames",
141 TRUE, G_PARAM_READWRITE));
143 parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
145 gobject_class->set_property = gst_dv1394src_set_property;
146 gobject_class->get_property = gst_dv1394src_get_property;
148 gstelement_class->change_state = gst_dv1394src_change_state;
152 gst_dv1394src_init (GstDV1394Src *dv1394src)
154 dv1394src->srcpad = gst_pad_new ("src", GST_PAD_SRC);
155 gst_pad_set_get_function (dv1394src->srcpad, gst_dv1394src_get);
156 gst_element_add_pad (GST_ELEMENT (dv1394src), dv1394src->srcpad);
160 dv1394src->channel = 63;
162 dv1394src->consecutive = 1;
164 dv1394src->drop_incomplete = TRUE;
166 /* initialized when first header received */
167 dv1394src->frameSize=0;
169 dv1394src->buf = NULL;
170 dv1394src->frame = NULL;
171 dv1394src->frameSequence = 0;
175 gst_dv1394src_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
177 GstDV1394Src *filter;
179 /* it's not null if we got it, but it might not be ours */
180 g_return_if_fail(GST_IS_DV1394SRC(object));
181 filter = GST_DV1394SRC(object);
185 filter->skip = g_value_get_int(value);
187 case ARG_CONSECUTIVE:
188 filter->consecutive = g_value_get_int(value);
190 case ARG_DROP_INCOMPLETE:
191 filter->drop_incomplete = g_value_get_boolean(value);
199 gst_dv1394src_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
201 GstDV1394Src *filter;
203 /* it's not null if we got it, but it might not be ours */
204 g_return_if_fail(GST_IS_DV1394SRC(object));
205 filter = GST_DV1394SRC(object);
209 g_value_set_int( value, filter->skip );
211 case ARG_CONSECUTIVE:
212 g_value_set_int( value, filter->consecutive );
214 case ARG_DROP_INCOMPLETE:
215 g_value_set_boolean( value, filter->drop_incomplete );
218 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
224 int gst_dv1394src_iso_receive(raw1394handle_t handle,int channel,size_t len,quadlet_t *data) {
225 GstDV1394Src *dv1394src = GST_DV1394SRC (raw1394_get_userdata(handle));
229 the following code taken from kino-0.51 (Dan Dennedy/Charles Yates)
231 unsigned char *p = (unsigned char*) & data[3];
232 int section_type = p[0] >> 5; /* section type is in bits 5 - 7 */
233 int dif_sequence = p[1] >> 4; /* dif sequence number is in bits 4 - 7 */
234 int dif_block = p[2];
236 /* if we are at the beginning of a frame,
237 we set buf=frame, and alloc a new buffer for frame
240 if (section_type == 0 && dif_sequence == 0) { // dif header
242 if( !dv1394src->negotiated) {
243 // figure format (NTSC/PAL)
246 dv1394src->frameSize = PAL_FRAMESIZE;
247 GST_DEBUG ("PAL data");
248 if (gst_pad_try_set_caps (dv1394src->srcpad,
249 gst_caps_new_simple ("video/dv",
250 "format", G_TYPE_STRING, "PAL", NULL)) <= 0) {
251 GST_ELEMENT_ERROR (dv1394src, CORE, NEGOTIATION, (NULL),
252 ("Could not set source caps for PAL"));
257 dv1394src->frameSize = NTSC_FRAMESIZE;
258 GST_DEBUG ("NTSC data [untested] - please report success/failure to <dan@f3c.com>");
259 if (gst_pad_try_set_caps (dv1394src->srcpad,
260 gst_caps_new_simple ("video/dv",
261 "format", G_TYPE_STRING, "NTSC", NULL)) <= 0) {
262 GST_ELEMENT_ERROR (dv1394src, CORE, NEGOTIATION, (NULL),
263 ("Could not set source caps for NTSC"));
267 dv1394src->negotiated = TRUE;
270 // drop last frame when not complete
271 if( !dv1394src->drop_incomplete || dv1394src->bytesInFrame == dv1394src->frameSize ) {
272 dv1394src->buf = dv1394src->frame;
274 GST_INFO_OBJECT (GST_ELEMENT(dv1394src), "incomplete frame dropped");
276 dv1394src->frame = NULL;
278 dv1394src->frameSequence++;
280 if( dv1394src->frameSequence % (dv1394src->skip+dv1394src->consecutive) < dv1394src->consecutive ) {
281 dv1394src->frame = gst_buffer_new_and_alloc (dv1394src->frameSize);
283 dv1394src->bytesInFrame = 0;
286 if (dv1394src->frame != NULL) {
287 void *data = GST_BUFFER_DATA( dv1394src->frame );
290 switch (section_type) {
291 case 0: /* 1 Header block */
292 /* p[3] |= 0x80; // hack to force PAL data */
293 memcpy(data + dif_sequence * 150 * 80, p, 480);
296 case 1: /* 2 Subcode blocks */
297 memcpy(data + dif_sequence * 150 * 80 + (1 + dif_block) * 80, p, 480);
300 case 2: /* 3 VAUX blocks */
301 memcpy(data + dif_sequence * 150 * 80 + (3 + dif_block) * 80, p, 480);
304 case 3: /* 9 Audio blocks interleaved with video */
305 memcpy(data + dif_sequence * 150 * 80 + (6 + dif_block * 16) * 80, p, 480);
308 case 4: /* 135 Video blocks interleaved with audio */
309 memcpy(data + dif_sequence * 150 * 80 + (7 + (dif_block / 15) + dif_block) * 80, p, 480);
312 default: /* we canĀ“t handle any other data */
315 dv1394src->bytesInFrame += 480;
323 int gst_dv1394src_bus_reset(raw1394handle_t handle,
324 unsigned int generation) {
325 GST_INFO_OBJECT (GST_DV1394SRC(raw1394_get_userdata(handle)),"have bus reset");
330 gst_dv1394src_get (GstPad *pad)
332 GstDV1394Src *dv1394src = GST_DV1394SRC (GST_PAD_PARENT(pad));
334 dv1394src->buf = NULL;
335 while (dv1394src->buf == NULL)
336 raw1394_loop_iterate(dv1394src->handle);
338 return GST_DATA(dv1394src->buf);
341 static GstElementStateReturn
342 gst_dv1394src_change_state (GstElement *element)
344 GstDV1394Src *dv1394src;
346 g_return_val_if_fail (GST_IS_DV1394SRC (element), GST_STATE_FAILURE);
347 dv1394src = GST_DV1394SRC (element);
349 switch (GST_STATE_TRANSITION (element)) {
350 case GST_STATE_NULL_TO_READY:
351 if ((dv1394src->handle = raw1394_new_handle()) == NULL) {
352 GST_INFO_OBJECT (dv1394src,"can't get raw1394 handle");
353 return GST_STATE_FAILURE;
355 raw1394_set_userdata(dv1394src->handle,dv1394src);
356 dv1394src->numcards = raw1394_get_port_info(dv1394src->handle,dv1394src->pinfo,16);
357 if (dv1394src->numcards == 0) {
358 GST_INFO_OBJECT (dv1394src,"no cards available for raw1394");
359 return GST_STATE_FAILURE;
361 if (dv1394src->pinfo[dv1394src->card].nodes <= 1) {
362 GST_INFO_OBJECT (dv1394src,"there are no nodes on the 1394 bus");
363 return GST_STATE_FAILURE;
365 if (raw1394_set_port(dv1394src->handle,dv1394src->port) < 0) {
366 GST_INFO_OBJECT (dv1394src,"can't set 1394 port %d",dv1394src->port);
367 return GST_STATE_FAILURE;
369 raw1394_set_iso_handler(dv1394src->handle,dv1394src->channel,gst_dv1394src_iso_receive);
370 raw1394_set_bus_reset_handler(dv1394src->handle,gst_dv1394src_bus_reset);
371 dv1394src->started = FALSE;
372 GST_DEBUG ("successfully opened up 1394 connection");
374 case GST_STATE_PAUSED_TO_PLAYING:
375 if (raw1394_start_iso_rcv(dv1394src->handle,dv1394src->channel) < 0) {
376 GST_INFO_OBJECT (dv1394src,"can't start 1394 iso receive");
377 return GST_STATE_FAILURE;
380 case GST_STATE_PLAYING_TO_PAUSED:
381 raw1394_stop_iso_rcv(dv1394src->handle, dv1394src->channel);
383 case GST_STATE_READY_TO_NULL:
384 raw1394_destroy_handle(dv1394src->handle);
390 /* if we haven't failed already, give the parent class a chance to ;-) */
391 if (GST_ELEMENT_CLASS (parent_class)->change_state)
392 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
394 return GST_STATE_SUCCESS;