gstreamer/ext/swfdec/gstswfdec.c
David Schleef a962c0f40c Add buffer length checks to every typefinding function
Original commit message from CVS:
Add buffer length checks to every typefinding function
2003-07-24 08:49:43 +00:00

680 lines
17 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2002,2003> David A. Schleef <ds@schleef.org>
*
* 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 "gstswfdec.h"
#include <string.h>
/* elementfactory information */
static GstElementDetails gst_swfdec_details = {
"SWF video decoder",
"Codec/Video/Decoder",
"LGPL",
"Uses libswfdec to decode Flash video streams",
VERSION,
"David Schleef <ds@schleef.org>",
"(C) 2002",
};
/* Swfdec signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
/* FILL ME */
};
GST_PAD_TEMPLATE_FACTORY (video_template_factory,
"video_00",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"swfdec_videosrc",
"video/x-raw-rgb",
"width", GST_PROPS_INT_RANGE (16, 4096),
"height", GST_PROPS_INT_RANGE (16, 4096),
"bpp", GST_PROPS_INT (24),
"depth", GST_PROPS_INT (24),
"endianness", GST_PROPS_INT (G_BIG_ENDIAN),
"red_mask", GST_PROPS_INT (0xff0000),
"green_mask", GST_PROPS_INT (0x00ff00),
"blue_mask", GST_PROPS_INT (0x0000ff),
"framerate", GST_PROPS_FLOAT_RANGE (0, G_MAXFLOAT)
)
);
GST_PAD_TEMPLATE_FACTORY (audio_template_factory,
"audio_00",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"swfdec_audiosrc",
"audio/x-raw-int",
"endianness", GST_PROPS_INT(G_BYTE_ORDER),
"signed", GST_PROPS_BOOLEAN(TRUE),
"width", GST_PROPS_INT(16),
"depth", GST_PROPS_INT(16),
"rate", GST_PROPS_INT(44100),
"channels", GST_PROPS_INT(2)
)
);
GST_PAD_TEMPLATE_FACTORY (sink_template_factory,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"swfdec_sink",
"application/x-shockwave-flash",
NULL
)
);
static void gst_swfdec_class_init (GstSwfdecClass *klass);
static void gst_swfdec_init (GstSwfdec *swfdec);
static void gst_swfdec_dispose (GObject *object);
static void gst_swfdec_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec);
static void gst_swfdec_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
#if 0
static gboolean gst_swfdec_src_event (GstPad *pad, GstEvent *event);
#endif
static gboolean gst_swfdec_src_query (GstPad *pad, GstQueryType type,
GstFormat *format, gint64 *value);
#if 0
static gboolean gst_swfdec_convert_sink (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
static gboolean gst_swfdec_convert_src (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
#endif
static GstElementStateReturn gst_swfdec_change_state (GstElement *element);
static GstElementClass *parent_class = NULL;
GType
gst_swfdec_get_type (void)
{
static GType swfdec_type = 0;
if (!swfdec_type) {
static const GTypeInfo swfdec_info = {
sizeof(GstSwfdecClass),
NULL,
NULL,
(GClassInitFunc)gst_swfdec_class_init,
NULL,
NULL,
sizeof(GstSwfdec),
0,
(GInstanceInitFunc)gst_swfdec_init,
};
swfdec_type = g_type_register_static(GST_TYPE_ELEMENT, "GstSwfdec", &swfdec_info, 0);
}
return swfdec_type;
}
static void
gst_swfdec_class_init(GstSwfdecClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
gobject_class->set_property = gst_swfdec_set_property;
gobject_class->get_property = gst_swfdec_get_property;
gobject_class->dispose = gst_swfdec_dispose;
gstelement_class->change_state = gst_swfdec_change_state;
}
static GstCaps *gst_swfdec_videosrc_getcaps(GstPad *pad, GstCaps *caps)
{
GstSwfdec *swfdec;
GstCaps *c;
swfdec = GST_SWFDEC (gst_pad_get_parent (pad));
c = GST_CAPS_NEW (
"swfdec_videosrc",
"video/x-raw-rgb",
"width", GST_PROPS_INT_RANGE (16, 4096),
"height", GST_PROPS_INT_RANGE (16, 4096),
"bpp", GST_PROPS_INT (24),
"depth", GST_PROPS_INT (24),
"endianness", GST_PROPS_INT (G_BIG_ENDIAN),
"red_mask", GST_PROPS_INT (0xff0000),
"green_mask", GST_PROPS_INT (0x00ff00),
"blue_mask", GST_PROPS_INT (0x0000ff),
"framerate", GST_PROPS_FLOAT (swfdec->frame_rate)
);
if(swfdec->height){
gst_caps_set(c,"height",GST_PROPS_INT(swfdec->height));
gst_caps_set(c,"width",GST_PROPS_INT(swfdec->width));
}
return c;
}
static void
gst_swfdec_loop(GstElement *element)
{
GstSwfdec *swfdec;
GstBuffer *buf = NULL;
int ret;
g_return_if_fail(element != NULL);
g_return_if_fail(GST_IS_SWFDEC(element));
swfdec = GST_SWFDEC(element);
if(!swfdec->videopad){
}
ret = swfdec_decoder_parse(swfdec->state);
if(ret==SWF_NEEDBITS){
buf = gst_pad_pull(swfdec->sinkpad);
if(GST_IS_EVENT(buf)){
switch (GST_EVENT_TYPE (buf)) {
case GST_EVENT_EOS:
printf("got eos\n");
break;
default:
printf("got event\n");
break;
}
}else{
if(!GST_BUFFER_DATA(buf)){
printf("expected non-null buffer\n");
}
ret = swfdec_decoder_addbits(swfdec->state,
GST_BUFFER_DATA(buf), GST_BUFFER_SIZE(buf));
}
}
if(ret==SWF_CHANGE){
swfdec_decoder_get_image_size(swfdec->state,
&swfdec->width, &swfdec->height);
swfdec_decoder_get_rate(swfdec->state, &swfdec->rate);
swfdec->interval = GST_SECOND / swfdec->rate;
gst_caps_debug(gst_swfdec_videosrc_getcaps(swfdec->videopad,NULL),"ack");
gst_pad_try_set_caps(swfdec->videopad,
gst_swfdec_videosrc_getcaps(swfdec->videopad,NULL));
return;
}
if(ret==SWF_IMAGE){
GstBuffer *newbuf = NULL;
unsigned char *data;
int len;
/* video stuff */
newbuf = gst_buffer_new();
GST_BUFFER_SIZE(newbuf) = swfdec->width * swfdec->height * 3;
swfdec_decoder_get_image(swfdec->state, &data);
GST_BUFFER_DATA(newbuf) = data;
swfdec->timestamp += swfdec->interval;
GST_BUFFER_TIMESTAMP(newbuf) = swfdec->timestamp;
gst_pad_push(swfdec->videopad, newbuf);
/* audio stuff */
data = swfdec_decoder_get_sound_chunk(swfdec->state, &len);
while(data){
newbuf = gst_buffer_new();
GST_BUFFER_SIZE(newbuf) = len;
GST_BUFFER_DATA(newbuf) = data;
GST_BUFFER_TIMESTAMP(newbuf) = swfdec->timestamp;
gst_pad_push(swfdec->audiopad, newbuf);
data = swfdec_decoder_get_sound_chunk(swfdec->state, &len);
}
}
if(ret==SWF_EOF){
gst_pad_push(swfdec->videopad, GST_BUFFER (gst_event_new (GST_EVENT_EOS)));
gst_pad_push(swfdec->audiopad, GST_BUFFER (gst_event_new (GST_EVENT_EOS)));
}
}
static void
gst_swfdec_init (GstSwfdec *swfdec)
{
/* create the sink and src pads */
swfdec->sinkpad = gst_pad_new_from_template (
GST_PAD_TEMPLATE_GET (sink_template_factory), "sink");
gst_element_add_pad (GST_ELEMENT (swfdec), swfdec->sinkpad);
swfdec->videopad = gst_pad_new_from_template(
GST_PAD_TEMPLATE_GET(video_template_factory),
"video_00");
gst_pad_set_query_function (swfdec->videopad,
GST_DEBUG_FUNCPTR (gst_swfdec_src_query));
gst_pad_set_getcaps_function (swfdec->videopad,
GST_DEBUG_FUNCPTR (gst_swfdec_videosrc_getcaps));
gst_element_add_pad(GST_ELEMENT(swfdec), swfdec->videopad);
swfdec->audiopad = gst_pad_new_from_template(
GST_PAD_TEMPLATE_GET(audio_template_factory),
"audio_00");
gst_pad_set_query_function (swfdec->audiopad,
GST_DEBUG_FUNCPTR (gst_swfdec_src_query));
gst_element_add_pad(GST_ELEMENT(swfdec), swfdec->audiopad);
gst_element_set_loop_function(GST_ELEMENT(swfdec), gst_swfdec_loop);
/* initialize the swfdec decoder state */
swfdec->state = swfdec_decoder_new();
g_return_if_fail(swfdec->state != NULL);
swfdec_decoder_set_colorspace(swfdec->state, SWF_COLORSPACE_RGB888);
GST_FLAG_SET (GST_ELEMENT (swfdec), GST_ELEMENT_EVENT_AWARE);
swfdec->frame_rate = 0.;
}
static void
gst_swfdec_dispose (GObject *object)
{
//GstSwfdec *swfdec = GST_SWFDEC (object);
/* FIXME */
//swfdec_decoder_free(swfdec->state);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
#if 0
static gboolean
gst_swfdec_convert_sink (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
gboolean res = TRUE;
GstSwfdec *swfdec;
swfdec = GST_SWFDEC (gst_pad_get_parent (pad));
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_TIME:
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_BYTES:
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
return res;
}
#endif
#if 0
static gboolean
gst_swfdec_convert_src (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
gboolean res = TRUE;
GstSwfdec *swfdec;
swfdec = GST_SWFDEC (gst_pad_get_parent (pad));
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_TIME:
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_BYTES:
*dest_value = src_value * 6 * (swfdec->width * swfdec->height >> 2) *
video_rates[swfdec->decoder->frame_rate_code] / GST_SECOND;
break;
case GST_FORMAT_DEFAULT:
*dest_value = src_value * video_rates[swfdec->decoder->frame_rate_code] / GST_SECOND;
break;
default:
res = FALSE;
}
break;
case GST_FORMAT_DEFAULT:
switch (*dest_format) {
case GST_FORMAT_TIME:
if (video_rates[swfdec->decoder->frame_rate_code] != 0.0) {
*dest_value = src_value * GST_SECOND /
video_rates[swfdec->decoder->frame_rate_code];
}
else
res = FALSE;
break;
case GST_FORMAT_BYTES:
*dest_value = src_value * 6 * (swfdec->width * swfdec->height >> 2);
break;
case GST_FORMAT_DEFAULT:
*dest_value = src_value;
break;
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
return res;
}
#endif
static gboolean
gst_swfdec_src_query (GstPad *pad, GstQueryType type,
GstFormat *format, gint64 *value)
{
gboolean res = TRUE;
GstSwfdec *swfdec;
swfdec = GST_SWFDEC (gst_pad_get_parent (pad));
switch (type) {
case GST_QUERY_TOTAL:
{
switch (*format) {
case GST_FORMAT_TIME:
{
int n_frames;
int ret;
res = FALSE;
ret = swfdec_decoder_get_n_frames(swfdec->state, &n_frames);
if(ret == SWF_OK){
*value = n_frames * swfdec->interval;
res = TRUE;
}
break;
}
default:
res = FALSE;
break;
}
break;
}
case GST_QUERY_POSITION:
{
switch (*format) {
default:
res = FALSE;
break;
}
break;
}
default:
res = FALSE;
break;
}
return res;
}
#if 0
static gboolean
gst_swfdec_src_event (GstPad *pad, GstEvent *event)
{
gboolean res = TRUE;
GstSwfdec *swfdec;
static const GstFormat formats[] = { GST_FORMAT_TIME, GST_FORMAT_BYTES };
#define MAX_SEEK_FORMATS 1 /* we can only do time seeking for now */
gint i;
swfdec = GST_SWFDEC (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
/* the all-formats seek logic */
case GST_EVENT_SEEK:
{
gint64 src_offset;
gboolean flush;
GstFormat format;
format = GST_FORMAT_TIME;
/* first bring the src_format to TIME */
if (!gst_pad_convert (pad,
GST_EVENT_SEEK_FORMAT (event), GST_EVENT_SEEK_OFFSET (event),
&format, &src_offset))
{
/* didn't work, probably unsupported seek format then */
res = FALSE;
break;
}
/* shave off the flush flag, we'll need it later */
flush = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;
/* assume the worst */
res = FALSE;
/* while we did not exhaust our seek formats without result */
for (i = 0; i < MAX_SEEK_FORMATS && !res; i++) {
gint64 desired_offset;
format = formats[i];
/* try to convert requested format to one we can seek with on the sinkpad */
if (gst_pad_convert (swfdec->sinkpad, GST_FORMAT_TIME, src_offset, &format, &desired_offset))
{
GstEvent *seek_event;
/* conversion succeeded, create the seek */
seek_event = gst_event_new_seek (formats[i] | GST_SEEK_METHOD_SET | flush, desired_offset);
/* do the seekk */
if (gst_pad_send_event (GST_PAD_PEER (swfdec->sinkpad), seek_event)) {
/* seek worked, we're done, loop will exit */
res = TRUE;
}
}
/* at this point, either the seek worked or res == FALSE */
}
break;
}
default:
res = FALSE;
break;
}
gst_event_unref (event);
return res;
}
#endif
static GstElementStateReturn
gst_swfdec_change_state (GstElement *element)
{
GstSwfdec *swfdec = GST_SWFDEC (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
break;
case GST_STATE_READY_TO_PAUSED:
{
//gst_swfdec_vo_open (swfdec);
//swfdec_decoder_new (swfdec->decoder, swfdec->accel, swfdec->vo);
//swfdec->decoder->is_sequence_needed = 1;
//swfdec->decoder->frame_rate_code = 0;
swfdec->timestamp = 0;
swfdec->pool = NULL;
swfdec->closed = FALSE;
/* reset the initial video state */
swfdec->format = -1;
swfdec->width = -1;
swfdec->height = -1;
swfdec->first = TRUE;
break;
}
case GST_STATE_PAUSED_TO_PLAYING:
/* try to get a bufferpool */
#if 0
swfdec->pool = gst_pad_get_bufferpool (swfdec->videopad);
if (swfdec->pool)
GST_INFO ( "got pool %p", swfdec->pool);
#endif
break;
case GST_STATE_PLAYING_TO_PAUSED:
/* need to clear things we get from other plugins, since we could be reconnected */
if (swfdec->pool) {
gst_buffer_pool_unref (swfdec->pool);
swfdec->pool = NULL;
}
break;
case GST_STATE_PAUSED_TO_READY:
/* if we are not closed by an EOS event do so now, this cen send a few frames but
* we are prepared to not really send them (see above) */
if (!swfdec->closed) {
/*swf_close (swfdec->decoder); */
swfdec->closed = TRUE;
}
//gst_swfdec_vo_destroy (swfdec);
break;
case GST_STATE_READY_TO_NULL:
break;
default:
break;
}
GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
static void
gst_swfdec_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstSwfdec *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_SWFDEC (object));
src = GST_SWFDEC (object);
switch (prop_id) {
default:
break;
}
}
static void
gst_swfdec_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstSwfdec *swfdec;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_SWFDEC (object));
swfdec = GST_SWFDEC (object);
switch (prop_id) {
default:
break;
}
}
static GstCaps *
swf_type_find(GstBuffer *buf, gpointer private)
{
gchar *data = GST_BUFFER_DATA(buf);
if (GST_BUFFER_SIZE (buf) < 4)
return NULL;
if((data[0] != 'F' && data[0] != 'C') ||
data[1] != 'W' || data[2] != 'S')return NULL;
return gst_caps_new("swf_type_find","application/x-shockwave-flash",
NULL);
}
static GstTypeDefinition swftype_definition =
{ "swfdecode/x-shockwave-flash", "application/x-shockwave-flash",
".swf .swfl", swf_type_find };
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
GstTypeFactory *type;
/* create an elementfactory for the swfdec element */
factory = gst_element_factory_new("swfdec",GST_TYPE_SWFDEC,
&gst_swfdec_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_element_factory_set_rank (factory, GST_ELEMENT_RANK_PRIMARY);
gst_element_factory_add_pad_template (factory,
GST_PAD_TEMPLATE_GET (video_template_factory));
gst_element_factory_add_pad_template (factory,
GST_PAD_TEMPLATE_GET (audio_template_factory));
gst_element_factory_add_pad_template (factory,
GST_PAD_TEMPLATE_GET (sink_template_factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
type = gst_type_factory_new(&swftype_definition);
gst_plugin_add_feature(plugin, GST_PLUGIN_FEATURE(type));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"swfdec",
plugin_init
};