2 * Copyright (C) <1999> Erik Walthinsen <omega@temple-baptist.com>
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 "gstflxdec.h"
27 #include <gst/video/video.h>
29 #define JIFFIE (GST_SECOND/70)
31 /* flx element information */
32 static GstElementDetails flxdec_details = {
34 "Codec/Decoder/Audio",
36 "Sepp Wijnands <mrrazz@garbage-coderz.net>"
39 /* Flx signals and args */
50 static GstStaticPadTemplate sink_factory =
51 GST_STATIC_PAD_TEMPLATE (
55 GST_STATIC_CAPS ( "video/x-fli" )
59 static GstStaticPadTemplate src_video_factory =
60 GST_STATIC_PAD_TEMPLATE (
64 GST_STATIC_CAPS ( GST_VIDEO_CAPS_xRGB_HOST_ENDIAN )
68 static void gst_flxdec_class_init (GstFlxDecClass *klass);
69 static void gst_flxdec_base_init (GstFlxDecClass *klass);
70 static void gst_flxdec_init (GstFlxDec *flxdec);
72 static void gst_flxdec_loop (GstElement *element);
74 static GstElementStateReturn
75 gst_flxdec_change_state (GstElement *element);
77 static void gst_flxdec_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
78 static void gst_flxdec_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
81 static void flx_decode_color (GstFlxDec *, guchar *, guchar *, gint);
82 static void flx_decode_brun (GstFlxDec *, guchar *, guchar *);
83 static void flx_decode_delta_fli (GstFlxDec *, guchar *, guchar *);
84 static void flx_decode_delta_flc (GstFlxDec *, guchar *, guchar *);
86 #define rndalign(off) ((off) + ((off) % 2))
88 static GstElementClass *parent_class = NULL;
91 gst_flxdec_get_type(void)
93 static GType flxdec_type = 0;
96 static const GTypeInfo flxdec_info = {
97 sizeof(GstFlxDecClass),
98 (GBaseInitFunc)gst_flxdec_base_init,
100 (GClassInitFunc)gst_flxdec_class_init,
105 (GInstanceInitFunc)gst_flxdec_init,
107 flxdec_type = g_type_register_static(GST_TYPE_ELEMENT, "GstFlxDec", &flxdec_info, 0);
113 gst_flxdec_base_init (GstFlxDecClass *klass)
115 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
117 gst_element_class_set_details (gstelement_class, &flxdec_details);
118 gst_element_class_add_pad_template (gstelement_class,
119 gst_static_pad_template_get (&sink_factory));
120 gst_element_class_add_pad_template (gstelement_class,
121 gst_static_pad_template_get (&src_video_factory));
125 gst_flxdec_class_init (GstFlxDecClass *klass)
127 GObjectClass *gobject_class;
128 GstElementClass *gstelement_class;
130 gobject_class = (GObjectClass*)klass;
131 gstelement_class = (GstElementClass*)klass;
133 parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
135 gobject_class->set_property = gst_flxdec_set_property;
136 gobject_class->get_property = gst_flxdec_get_property;
138 gstelement_class->change_state = gst_flxdec_change_state;
144 gst_flxdec_init(GstFlxDec *flxdec)
146 flxdec->sinkpad = gst_pad_new_from_template (
147 gst_static_pad_template_get (&sink_factory), "sink");
148 gst_element_add_pad(GST_ELEMENT(flxdec),flxdec->sinkpad);
149 gst_element_set_loop_function(GST_ELEMENT(flxdec),gst_flxdec_loop);
151 flxdec->srcpad = gst_pad_new_from_template (
152 gst_static_pad_template_get (&src_video_factory), "src");
153 gst_element_add_pad(GST_ELEMENT(flxdec),flxdec->srcpad);
156 flxdec->frame = NULL;
157 flxdec->delta = NULL;
161 flx_decode_chunks (GstFlxDec *flxdec , gulong count, gchar *data, gchar *dest)
165 g_return_if_fail(data != NULL);
168 hdr = (FlxFrameChunk *) data;
169 data += FlxFrameChunkSize;
174 flx_decode_color(flxdec, data, dest, 2);
175 data += rndalign(hdr->size) - FlxFrameChunkSize;
179 flx_decode_color(flxdec, data, dest, 0);
180 data += rndalign(hdr->size) - FlxFrameChunkSize;
184 flx_decode_brun(flxdec, data, dest);
185 data += rndalign(hdr->size) - FlxFrameChunkSize;
189 flx_decode_delta_fli(flxdec, data, dest);
190 data += rndalign(hdr->size) - FlxFrameChunkSize;
194 flx_decode_delta_flc(flxdec, data, dest);
195 data += rndalign(hdr->size) - FlxFrameChunkSize;
199 memset(dest, 0, flxdec->size);
203 data += rndalign(hdr->size) - FlxFrameChunkSize;
207 g_print("GstFlxDec: Unimplented chunk type: 0x%02x size: %d\n",
209 g_print("GstFlxDec: Skipping...\n");
210 data += rndalign(hdr->size) - FlxFrameChunkSize;
218 flx_decode_color(GstFlxDec *flxdec, guchar *data, guchar *dest, gint scale)
220 guint packs, count, indx;
222 g_return_if_fail(flxdec != NULL);
224 packs = (data[0] + (data[1] << 8));
229 g_print("GstFlxDec: cmap packs: %d\n", packs);
231 /* color map index + skip count */
234 /* number of rgb triplets */
235 count = *data++ & 0xff;
239 g_print("GstFlxDec: cmap count: %d (indx: %d)\n", count, indx);
240 flx_set_palette_vector(flxdec->converter, indx, count, data, scale);
247 flx_decode_brun(GstFlxDec *flxdec, guchar *data, guchar *dest)
249 gulong count, lines, row;
252 g_return_if_fail(flxdec != NULL);
254 lines = flxdec->hdr.height;
257 * should not be used anymore, since the flc format can
258 * contain more then 255 RLE packets. we use the frame
263 row = flxdec->hdr.width;
269 count = 0x100 - count;
288 flx_decode_delta_fli(GstFlxDec *flxdec, guchar *data, guchar *dest)
290 gulong count, packets, lines, start_line, start_l;
293 g_return_if_fail(flxdec != NULL);
294 g_return_if_fail(flxdec->delta != NULL);
297 /* use last frame for delta */
298 memcpy(dest, GST_BUFFER_DATA(flxdec->delta),
299 GST_BUFFER_SIZE(flxdec->delta));
301 start_line = (data[0] + (data[1] << 8));
302 lines = (data[2] + (data[3] << 8));
305 /* start position of delta */
306 dest += (flxdec->hdr.width * start_line);
323 count = 0x100 - count;
335 start_p += flxdec->hdr.width;
341 flx_decode_delta_flc(GstFlxDec *flxdec, guchar *data, guchar *dest)
343 gulong count, lines, start_l, opcode;
346 g_return_if_fail(flxdec != NULL);
347 g_return_if_fail(flxdec->delta != NULL);
350 /* use last frame for delta */
351 memcpy(dest, GST_BUFFER_DATA(flxdec->delta),
352 GST_BUFFER_SIZE(flxdec->delta));
354 lines = (data[0] + (data[1] << 8));
361 dest = start_p + (flxdec->hdr.width * (start_l - lines));
363 /* process opcode(s) */
364 while ((opcode = (data[0] + (data[1] << 8))) & 0xc000) {
366 if ((opcode & 0xc000) == 0xc000) {
368 start_l += (0x10000 - opcode);
369 dest += flxdec->hdr.width * (0x10000 - opcode);
372 dest += flxdec->hdr.width;
373 *dest++ = (opcode & 0xff);
378 /* last opcode is the packet count */
387 /* replicate word run */
388 count = 0x100 - count;
395 /* literal word run */
407 flx_get_data(GstFlxDec *flxdec, gulong size)
412 g_return_val_if_fail (flxdec != NULL, NULL);
414 got_bytes = gst_bytestream_read (flxdec->bs, &retbuf, size);
415 if (got_bytes < size) {
419 gst_bytestream_get_status (flxdec->bs, &remaining, &event);
420 gst_pad_event_default (flxdec->sinkpad, event);
428 gst_flxdec_loop (GstElement *element)
432 guchar *data, *chunk;
437 FlxFrameChunk *flxfh;
439 g_return_if_fail (element != NULL);
440 g_return_if_fail (GST_IS_FLXDEC(element));
442 GST_DEBUG ("entering loop function");
444 flxdec = GST_FLXDEC(element);
446 if (flxdec->state == GST_FLXDEC_READ_HEADER) {
447 databuf = flx_get_data(flxdec, FlxHeaderSize);
450 g_print ("empty buffer\n");
454 data = GST_BUFFER_DATA(databuf);
456 memcpy((char *) &flxdec->hdr, data, sizeof(FlxHeader));
458 gst_buffer_unref (databuf);
463 if (flxh->type != FLX_MAGICHDR_FLI &&
464 flxh->type != FLX_MAGICHDR_FLC &&
465 flxh->type != FLX_MAGICHDR_FLX) {
466 GST_ELEMENT_ERROR (element, STREAM, WRONG_TYPE, (NULL), ("not a flx file (type %d)\n", flxh->type));
471 g_print("GstFlxDec: size : %d\n", flxh->size);
472 g_print("GstFlxDec: frames : %d\n", flxh->frames);
473 g_print("GstFlxDec: width : %d\n", flxh->width);
474 g_print("GstFlxDec: height : %d\n", flxh->height);
475 g_print("GstFlxDec: depth : %d\n", flxh->depth);
476 g_print("GstFlxDec: speed : %d\n", flxh->speed);
478 flxdec->next_time = 0;
480 if (flxh->type == FLX_MAGICHDR_FLI) {
481 flxdec->frame_time = JIFFIE * flxh->speed;
484 flxdec->frame_time = flxh->speed * GST_MSECOND;
487 caps = gst_caps_from_string (GST_VIDEO_CAPS_xRGB_HOST_ENDIAN);
488 gst_caps_set_simple (caps,
489 "width", G_TYPE_INT, flxh->width,
490 "height", G_TYPE_INT, flxh->height,
491 "framerate", G_TYPE_DOUBLE, GST_SECOND/flxdec->frame_time, NULL);
493 if (flxh->depth <= 8)
494 flxdec->converter = flx_colorspace_converter_new(flxh->width, flxh->height);
496 if (flxh->type == FLX_MAGICHDR_FLC ||
497 flxh->type == FLX_MAGICHDR_FLX) {
498 g_print("GstFlxDec: (FLC) aspect_dx : %d\n", flxh->aspect_dx);
499 g_print("GstFlxDec: (FLC) aspect_dy : %d\n", flxh->aspect_dy);
500 g_print("GstFlxDec: (FLC) oframe1 : 0x%08x\n", flxh->oframe1);
501 g_print("GstFlxDec: (FLC) oframe2 : 0x%08x\n", flxh->oframe2);
504 flxdec->size = (flxh->width * flxh->height);
506 /* create delta and output frame */
507 flxdec->frame = gst_buffer_new();
508 flxdec->delta = gst_buffer_new();
509 GST_BUFFER_DATA(flxdec->frame) = g_malloc(flxdec->size);
510 GST_BUFFER_SIZE(flxdec->frame) = flxdec->size;
511 GST_BUFFER_DATA(flxdec->delta) = g_malloc(flxdec->size);
512 GST_BUFFER_SIZE(flxdec->delta) = flxdec->size;
514 flxdec->state = GST_FLXDEC_PLAYING;
516 else if (flxdec->state == GST_FLXDEC_PLAYING) {
519 databuf = flx_get_data(flxdec, FlxFrameChunkSize);
523 flxfh = (FlxFrameChunk *) GST_BUFFER_DATA(databuf);
527 buf = flx_get_data(flxdec, flxfh->size-FlxFrameChunkSize);
529 chunk = GST_BUFFER_DATA(buf);
531 if (((FlxFrameType *)chunk)->chunks == 0)
534 /* create 32 bits output frame */
535 out = gst_buffer_new();
536 GST_BUFFER_DATA(out) = g_malloc(flxdec->size * 4);
537 GST_BUFFER_SIZE(out) = flxdec->size * 4;
540 flx_decode_chunks(flxdec,
541 ((FlxFrameType *)chunk)->chunks,
542 GST_BUFFER_DATA(buf) + FlxFrameTypeSize,
543 GST_BUFFER_DATA(flxdec->frame));
545 /* destroy input buffer*/
546 gst_buffer_unref(buf);
548 /* save copy of the current frame for possible delta. */
549 memcpy(GST_BUFFER_DATA(flxdec->delta),
550 GST_BUFFER_DATA(flxdec->frame),
551 GST_BUFFER_SIZE(flxdec->delta));
553 /* convert current frame. */
554 flx_colorspace_convert(flxdec->converter,
555 GST_BUFFER_DATA(flxdec->frame),
556 GST_BUFFER_DATA(out));
558 GST_BUFFER_TIMESTAMP (out) = flxdec->next_time;
559 flxdec->next_time += flxdec->frame_time;
561 gst_pad_push(flxdec->srcpad, GST_DATA (out));
566 /* destroy header buffer */
567 gst_buffer_unref(databuf);
571 static GstElementStateReturn
572 gst_flxdec_change_state (GstElement *element)
576 flxdec = GST_FLXDEC(element);
578 switch (GST_STATE_TRANSITION (element)) {
579 case GST_STATE_NULL_TO_READY:
581 case GST_STATE_READY_TO_PAUSED:
582 flxdec->bs = gst_bytestream_new (flxdec->sinkpad);
583 flxdec->state = GST_FLXDEC_READ_HEADER;
585 case GST_STATE_PAUSED_TO_PLAYING:
587 case GST_STATE_PLAYING_TO_PAUSED:
589 case GST_STATE_PAUSED_TO_READY:
590 gst_buffer_unref (flxdec->frame);
591 flxdec->frame = NULL;
592 gst_buffer_unref (flxdec->delta);
593 flxdec->delta = NULL;
594 gst_bytestream_destroy (flxdec->bs);
596 case GST_STATE_READY_TO_NULL:
600 parent_class->change_state (element);
602 return GST_STATE_SUCCESS;
606 gst_flxdec_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
610 /* it's not null if we got it, but it might not be ours */
611 g_return_if_fail(GST_IS_FLXDEC(object));
612 flxdec = GST_FLXDEC(object);
621 gst_flxdec_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
625 /* it's not null if we got it, but it might not be ours */
626 g_return_if_fail(GST_IS_FLXDEC(object));
627 flxdec = GST_FLXDEC(object);
631 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
637 plugin_init (GstPlugin *plugin)
639 if (!gst_library_load ("gstbytestream"))
642 return gst_element_register (plugin, "flxdec",
643 GST_RANK_PRIMARY, GST_TYPE_FLXDEC);