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gstreamer/gst/flx/gstflxdec.c
Andy Wingo 7ebd7b97d4 All plugins updated for element state changes. 
Original commit message from CVS:
2005-09-02  Andy Wingo  <wingo@pobox.com>

* All plugins updated for element state changes.
2005-09-02 15:44:50 +00:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@temple-baptist.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "flx_fmt.h"
#include "gstflxdec.h"
#include <gst/video/video.h>
#define JIFFIE (GST_SECOND/70)
GST_DEBUG_CATEGORY_STATIC (flxdec_debug);
#define GST_CAT_DEFAULT flxdec_debug
/* flx element information */
static GstElementDetails flxdec_details = {
"FLX Decoder",
"Codec/Decoder/Audio",
"FLX decoder",
"Sepp Wijnands <mrrazz@garbage-coderz.net>"
};
/* Flx signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0
};
/* input */
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-fli")
);
/* output */
static GstStaticPadTemplate src_video_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_xRGB_HOST_ENDIAN)
);
static void gst_flxdec_class_init (GstFlxDecClass * klass);
static void gst_flxdec_base_init (GstFlxDecClass * klass);
static void gst_flxdec_init (GstFlxDec * flxdec);
static void gst_flxdec_loop (GstElement * element);
static GstStateChangeReturn gst_flxdec_change_state (GstElement * element,
GstStateChange transition);
static void gst_flxdec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_flxdec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void flx_decode_color (GstFlxDec *, guchar *, guchar *, gint);
static void flx_decode_brun (GstFlxDec *, guchar *, guchar *);
static void flx_decode_delta_fli (GstFlxDec *, guchar *, guchar *);
static void flx_decode_delta_flc (GstFlxDec *, guchar *, guchar *);
#define rndalign(off) ((off) + ((off) % 2))
static GstElementClass *parent_class = NULL;
GType
gst_flxdec_get_type (void)
{
static GType flxdec_type = 0;
if (!flxdec_type) {
static const GTypeInfo flxdec_info = {
sizeof (GstFlxDecClass),
(GBaseInitFunc) gst_flxdec_base_init,
NULL,
(GClassInitFunc) gst_flxdec_class_init,
NULL,
NULL,
sizeof (GstFlxDec),
0,
(GInstanceInitFunc) gst_flxdec_init,
};
flxdec_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstFlxDec", &flxdec_info, 0);
}
return flxdec_type;
}
static void
gst_flxdec_base_init (GstFlxDecClass * klass)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
gst_element_class_set_details (gstelement_class, &flxdec_details);
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&sink_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&src_video_factory));
}
static void
gst_flxdec_class_init (GstFlxDecClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
GST_DEBUG_CATEGORY_INIT (flxdec_debug, "flxdec", 0, "FLX video decoder");
gobject_class->set_property = gst_flxdec_set_property;
gobject_class->get_property = gst_flxdec_get_property;
gstelement_class->change_state = gst_flxdec_change_state;
}
static void
gst_flxdec_init (GstFlxDec * flxdec)
{
flxdec->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get (&sink_factory),
"sink");
gst_element_add_pad (GST_ELEMENT (flxdec), flxdec->sinkpad);
gst_element_set_loop_function (GST_ELEMENT (flxdec), gst_flxdec_loop);
flxdec->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&src_video_factory), "src");
gst_element_add_pad (GST_ELEMENT (flxdec), flxdec->srcpad);
gst_pad_use_explicit_caps (flxdec->srcpad);
flxdec->bs = NULL;
flxdec->frame = NULL;
flxdec->delta = NULL;
}
static void
flx_decode_chunks (GstFlxDec * flxdec, gulong count, gchar * data, gchar * dest)
{
FlxFrameChunk *hdr;
g_return_if_fail (data != NULL);
while (count--) {
hdr = (FlxFrameChunk *) data;
data += FlxFrameChunkSize;
switch (hdr->id) {
case FLX_COLOR64:
flx_decode_color (flxdec, data, dest, 2);
data += rndalign (hdr->size) - FlxFrameChunkSize;
break;
case FLX_COLOR256:
flx_decode_color (flxdec, data, dest, 0);
data += rndalign (hdr->size) - FlxFrameChunkSize;
break;
case FLX_BRUN:
flx_decode_brun (flxdec, data, dest);
data += rndalign (hdr->size) - FlxFrameChunkSize;
break;
case FLX_LC:
flx_decode_delta_fli (flxdec, data, dest);
data += rndalign (hdr->size) - FlxFrameChunkSize;
break;
case FLX_SS2:
flx_decode_delta_flc (flxdec, data, dest);
data += rndalign (hdr->size) - FlxFrameChunkSize;
break;
case FLX_BLACK:
memset (dest, 0, flxdec->size);
break;
case FLX_MINI:
data += rndalign (hdr->size) - FlxFrameChunkSize;
break;
default:
GST_WARNING ("Unimplented chunk type: 0x%02x size: %d - skipping",
hdr->id, hdr->size);
data += rndalign (hdr->size) - FlxFrameChunkSize;
break;
}
}
}
static void
flx_decode_color (GstFlxDec * flxdec, guchar * data, guchar * dest, gint scale)
{
guint packs, count, indx;
g_return_if_fail (flxdec != NULL);
packs = (data[0] + (data[1] << 8));
data += 2;
indx = 0;
GST_LOG ("GstFlxDec: cmap packs: %d", packs);
while (packs--) {
/* color map index + skip count */
indx += *data++;
/* number of rgb triplets */
count = *data++ & 0xff;
if (count == 0)
count = 256;
GST_LOG ("GstFlxDec: cmap count: %d (indx: %d)\n", count, indx);
flx_set_palette_vector (flxdec->converter, indx, count, data, scale);
data += (count * 3);
}
}
static void
flx_decode_brun (GstFlxDec * flxdec, guchar * data, guchar * dest)
{
gulong count, lines, row;
guchar x;
g_return_if_fail (flxdec != NULL);
lines = flxdec->hdr.height;
while (lines--) {
/* packet count.
* should not be used anymore, since the flc format can
* contain more then 255 RLE packets. we use the frame
* width instead.
*/
data++;
row = flxdec->hdr.width;
while (row) {
count = *data++;
if (count > 0x7f) {
/* literal run */
count = 0x100 - count;
row -= count;
while (count--)
*dest++ = *data++;
} else {
/* replicate run */
row -= count;
x = *data++;
while (count--)
*dest++ = x;
}
}
}
}
static void
flx_decode_delta_fli (GstFlxDec * flxdec, guchar * data, guchar * dest)
{
gulong count, packets, lines, start_line, start_l;
guchar *start_p, x;
g_return_if_fail (flxdec != NULL);
g_return_if_fail (flxdec->delta != NULL);
/* use last frame for delta */
memcpy (dest, GST_BUFFER_DATA (flxdec->delta),
GST_BUFFER_SIZE (flxdec->delta));
start_line = (data[0] + (data[1] << 8));
lines = (data[2] + (data[3] << 8));
data += 4;
/* start position of delta */
dest += (flxdec->hdr.width * start_line);
start_p = dest;
start_l = lines;
while (lines--) {
/* packet count */
packets = *data++;
while (packets--) {
/* skip count */
dest += *data++;
/* RLE count */
count = *data++;
if (count > 0x7f) {
/* literal run */
count = 0x100 - count;
x = *data++;
while (count--)
*dest++ = x;
} else {
/* replicate run */
while (count--)
*dest++ = *data++;
}
}
start_p += flxdec->hdr.width;
dest = start_p;
}
}
static void
flx_decode_delta_flc (GstFlxDec * flxdec, guchar * data, guchar * dest)
{
gulong count, lines, start_l, opcode;
guchar *start_p;
g_return_if_fail (flxdec != NULL);
g_return_if_fail (flxdec->delta != NULL);
/* use last frame for delta */
memcpy (dest, GST_BUFFER_DATA (flxdec->delta),
GST_BUFFER_SIZE (flxdec->delta));
lines = (data[0] + (data[1] << 8));
data += 2;
start_p = dest;
start_l = lines;
while (lines) {
dest = start_p + (flxdec->hdr.width * (start_l - lines));
/* process opcode(s) */
while ((opcode = (data[0] + (data[1] << 8))) & 0xc000) {
data += 2;
if ((opcode & 0xc000) == 0xc000) {
/* skip count */
start_l += (0x10000 - opcode);
dest += flxdec->hdr.width * (0x10000 - opcode);
} else {
/* last pixel */
dest += flxdec->hdr.width;
*dest++ = (opcode & 0xff);
}
}
data += 2;
/* last opcode is the packet count */
while (opcode--) {
/* skip count */
dest += *data++;
/* RLE count */
count = *data++;
if (count > 0x7f) {
/* replicate word run */
count = 0x100 - count;
while (count--) {
*dest++ = data[0];
*dest++ = data[1];
}
data += 2;
} else {
/* literal word run */
while (count--) {
*dest++ = *data++;
*dest++ = *data++;
}
}
}
lines--;
}
}
static GstBuffer *
flx_get_data (GstFlxDec * flxdec, gulong size)
{
GstBuffer *retbuf;
guint32 got_bytes;
g_return_val_if_fail (flxdec != NULL, NULL);
got_bytes = gst_bytestream_read (flxdec->bs, &retbuf, size);
if (got_bytes < size) {
GstEvent *event;
guint32 remaining;
gst_bytestream_get_status (flxdec->bs, &remaining, &event);
gst_pad_event_default (flxdec->sinkpad, event);
}
return retbuf;
}
static void
gst_flxdec_loop (GstElement * element)
{
GstBuffer *buf;
GstBuffer *databuf;
guchar *data, *chunk;
GstCaps *caps;
GstFlxDec *flxdec;
FlxHeader *flxh;
FlxFrameChunk *flxfh;
g_return_if_fail (element != NULL);
g_return_if_fail (GST_IS_FLXDEC (element));
GST_DEBUG ("entering loop function");
flxdec = GST_FLXDEC (element);
if (flxdec->state == GST_FLXDEC_READ_HEADER) {
databuf = flx_get_data (flxdec, FlxHeaderSize);
if (!databuf) {
GST_LOG ("empty buffer");
return;
}
data = GST_BUFFER_DATA (databuf);
memcpy ((char *) &flxdec->hdr, data, sizeof (FlxHeader));
gst_buffer_unref (databuf);
flxh = &flxdec->hdr;
/* check header */
if (flxh->type != FLX_MAGICHDR_FLI &&
flxh->type != FLX_MAGICHDR_FLC && flxh->type != FLX_MAGICHDR_FLX) {
GST_ELEMENT_ERROR (element, STREAM, WRONG_TYPE, (NULL),
("not a flx file (type %d)\n", flxh->type));
return;
}
GST_LOG ("size : %d\n", flxh->size);
GST_LOG ("frames : %d\n", flxh->frames);
GST_LOG ("width : %d\n", flxh->width);
GST_LOG ("height : %d\n", flxh->height);
GST_LOG ("depth : %d\n", flxh->depth);
GST_LOG ("speed : %d\n", flxh->speed);
flxdec->next_time = 0;
if (flxh->type == FLX_MAGICHDR_FLI) {
flxdec->frame_time = JIFFIE * flxh->speed;
} else {
flxdec->frame_time = flxh->speed * GST_MSECOND;
}
caps = gst_caps_from_string (GST_VIDEO_CAPS_xRGB_HOST_ENDIAN);
gst_caps_set_simple (caps,
"width", G_TYPE_INT, flxh->width,
"height", G_TYPE_INT, flxh->height,
"framerate", G_TYPE_DOUBLE, (gdouble) (GST_SECOND / flxdec->frame_time),
NULL);
gst_pad_set_explicit_caps (flxdec->srcpad, caps);
if (flxh->depth <= 8)
flxdec->converter =
flx_colorspace_converter_new (flxh->width, flxh->height);
if (flxh->type == FLX_MAGICHDR_FLC || flxh->type == FLX_MAGICHDR_FLX) {
GST_LOG ("(FLC) aspect_dx : %d\n", flxh->aspect_dx);
GST_LOG ("(FLC) aspect_dy : %d\n", flxh->aspect_dy);
GST_LOG ("(FLC) oframe1 : 0x%08x\n", flxh->oframe1);
GST_LOG ("(FLC) oframe2 : 0x%08x\n", flxh->oframe2);
}
flxdec->size = (flxh->width * flxh->height);
/* create delta and output frame */
flxdec->frame = gst_buffer_new ();
flxdec->delta = gst_buffer_new ();
GST_BUFFER_DATA (flxdec->frame) = g_malloc (flxdec->size);
GST_BUFFER_SIZE (flxdec->frame) = flxdec->size;
GST_BUFFER_DATA (flxdec->delta) = g_malloc (flxdec->size);
GST_BUFFER_SIZE (flxdec->delta) = flxdec->size;
flxdec->state = GST_FLXDEC_PLAYING;
} else if (flxdec->state == GST_FLXDEC_PLAYING) {
GstBuffer *out;
databuf = flx_get_data (flxdec, FlxFrameChunkSize);
if (!databuf)
return;
flxfh = (FlxFrameChunk *) GST_BUFFER_DATA (databuf);
switch (flxfh->id) {
case FLX_FRAME_TYPE:
buf = flx_get_data (flxdec, flxfh->size - FlxFrameChunkSize);
chunk = GST_BUFFER_DATA (buf);
if (((FlxFrameType *) chunk)->chunks == 0)
break;
/* create 32 bits output frame */
out = gst_buffer_new ();
GST_BUFFER_DATA (out) = g_malloc (flxdec->size * 4);
GST_BUFFER_SIZE (out) = flxdec->size * 4;
/* decode chunks */
flx_decode_chunks (flxdec,
((FlxFrameType *) chunk)->chunks,
GST_BUFFER_DATA (buf) + FlxFrameTypeSize,
GST_BUFFER_DATA (flxdec->frame));
/* destroy input buffer */
gst_buffer_unref (buf);
/* save copy of the current frame for possible delta. */
memcpy (GST_BUFFER_DATA (flxdec->delta),
GST_BUFFER_DATA (flxdec->frame), GST_BUFFER_SIZE (flxdec->delta));
/* convert current frame. */
flx_colorspace_convert (flxdec->converter,
GST_BUFFER_DATA (flxdec->frame), GST_BUFFER_DATA (out));
GST_BUFFER_TIMESTAMP (out) = flxdec->next_time;
flxdec->next_time += flxdec->frame_time;
gst_pad_push (flxdec->srcpad, GST_DATA (out));
break;
}
/* destroy header buffer */
gst_buffer_unref (databuf);
}
}
static GstStateChangeReturn
gst_flxdec_change_state (GstElement * element, GstStateChange transition)
{
GstFlxDec *flxdec;
flxdec = GST_FLXDEC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
flxdec->bs = gst_bytestream_new (flxdec->sinkpad);
flxdec->state = GST_FLXDEC_READ_HEADER;
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_buffer_unref (flxdec->frame);
flxdec->frame = NULL;
gst_buffer_unref (flxdec->delta);
flxdec->delta = NULL;
gst_bytestream_destroy (flxdec->bs);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
}
parent_class->change_state (element, transition);
return GST_STATE_CHANGE_SUCCESS;
}
static void
gst_flxdec_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstFlxDec *flxdec;
g_return_if_fail (GST_IS_FLXDEC (object));
flxdec = GST_FLXDEC (object);
switch (prop_id) {
default:
break;
}
}
static void
gst_flxdec_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstFlxDec *flxdec;
g_return_if_fail (GST_IS_FLXDEC (object));
flxdec = GST_FLXDEC (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
plugin_init (GstPlugin * plugin)
{
if (!gst_library_load ("gstbytestream"))
return FALSE;
return gst_element_register (plugin, "flxdec",
GST_RANK_PRIMARY, GST_TYPE_FLXDEC);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"flxdec",
"FLX video decoder",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)
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