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gst/multipart/multipartdemux.c: Applied #318663. Gives quite a few false positives in autoscan mode, but it's better ...

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Original commit message from CVS:
* gst/multipart/multipartdemux.c: (gst_multipart_demux_base_init),
(gst_multipart_demux_class_init), (gst_multipart_demux_init),
(gst_multipart_demux_finalize), (gst_multipart_find_pad_by_mime),
(gst_multipart_demux_chain), (gst_multipart_demux_change_state),
(gst_multipart_set_property), (gst_multipart_get_property):
Applied #318663. Gives quite a few false positives in
autoscan mode, but it's better than nothing. Not closing yet.
This commit is contained in:
Wim Taymans 2006-02-16 16:53:52 +00:00
parent 9e085424e7
commit dad1e05fb7
2 changed files with 168 additions and 15 deletions
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10
ChangeLog
View file

@ -1,3 +1,13 @@
2006-02-16 Wim Taymans <wim@fluendo.com>
* gst/multipart/multipartdemux.c: (gst_multipart_demux_base_init),
(gst_multipart_demux_class_init), (gst_multipart_demux_init),
(gst_multipart_demux_finalize), (gst_multipart_find_pad_by_mime),
(gst_multipart_demux_chain), (gst_multipart_demux_change_state),
(gst_multipart_set_property), (gst_multipart_get_property):
Applied #318663. Gives quite a few false positives in
autoscan mode, but it's better than nothing. Not closing yet.
2006-02-16 Wim Taymans <wim@fluendo.com>
* docs/plugins/Makefile.am:

173
gst/multipart/multipartdemux.c
View file

@ -29,7 +29,8 @@
* <para>
* MultipartDemux uses the Content-type field of incoming buffers to demux and
* push data to dynamic source pads. Most of the time multipart streams are
* sequential JPEG frames.
* sequential JPEG frames generated from a live source such as a network source
* or a camera.
* </para>
* <title>Sample pipelines</title>
* <para>
@ -39,6 +40,15 @@
* gst-launch filesrc location=/tmp/test.multipart ! multipartdemux ! jpegdec ! video/x-raw-yuv, framerate=(fraction)5/1 ! ffmpegcolorspace ! ximagesink
* </programlisting>
* </para>
* <para>
* The output buffers of the multipartdemux typically have no timestamps and are usually
* played as fast as possible (at the rate that the source provides the data).
* </para>
* <para>
* the content in multipart files is separated with a boundary string that can be
* configured specifically with the "boundary" property or can be autodetected by
* setting the "autoscan" property to TRUE.
* </para>
* </refsect2>
*/
@ -96,6 +106,11 @@ struct _GstMultipartDemux
gint bufsize;
gint scanpos;
gint lastpos;
gchar *prefix;
gint prefixLen;
gboolean first_frame;
gboolean autoscan;
};
struct _GstMultipartDemuxClass
@ -106,9 +121,6 @@ struct _GstMultipartDemuxClass
GST_DEBUG_CATEGORY_STATIC (gst_multipart_demux_debug);
#define GST_CAT_DEFAULT gst_multipart_demux_debug
static gchar toFind[] = "--ThisRandomString\nContent-type: ";
static gint toFindLen;
/* elementfactory information */
static GstElementDetails gst_multipart_demux_details =
GST_ELEMENT_DETAILS ("multipart demuxer",
@ -124,10 +136,14 @@ enum
LAST_SIGNAL
};
#define DEFAULT_BOUNDARY "ThisRandomString"
#define DEFAULT_AUTOSCAN FALSE
enum
{
ARG_0,
/* FILL ME */
PROP_0,
PROP_BOUNDARY,
PROP_AUTOSCAN
/* FILL ME */
};
static GstStaticPadTemplate multipart_demux_src_template_factory =
@ -148,6 +164,14 @@ static GstFlowReturn gst_multipart_demux_chain (GstPad * pad, GstBuffer * buf);
static GstStateChangeReturn gst_multipart_demux_change_state (GstElement *
element, GstStateChange transition);
static void gst_multipart_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_multipart_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_multipart_demux_finalize (GObject * object);
GST_BOILERPLATE (GstMultipartDemux, gst_multipart_demux, GstElement,
GST_TYPE_ELEMENT)
@ -155,23 +179,37 @@ GST_BOILERPLATE (GstMultipartDemux, gst_multipart_demux, GstElement,
static void gst_multipart_demux_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
GObjectClass *gobject_class = G_OBJECT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_multipart_demux_details);
gobject_class->set_property = gst_multipart_set_property;
gobject_class->get_property = gst_multipart_get_property;
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&multipart_demux_sink_template_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&multipart_demux_src_template_factory));
toFindLen = strlen (toFind);
g_object_class_install_property (gobject_class, PROP_BOUNDARY,
g_param_spec_string ("boundary", "Boundary",
"The boundary string separating data", DEFAULT_BOUNDARY,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
g_object_class_install_property (gobject_class, PROP_AUTOSCAN,
g_param_spec_boolean ("autoscan", "autoscan",
"Try to autofind the prefix", DEFAULT_AUTOSCAN,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
}
static void
gst_multipart_demux_class_init (GstMultipartDemuxClass * klass)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gstelement_class->change_state = gst_multipart_demux_change_state;
gobject_class->finalize = gst_multipart_demux_finalize;
}
static void
@ -187,10 +225,16 @@ gst_multipart_demux_init (GstMultipartDemux * multipart,
GST_DEBUG_FUNCPTR (gst_multipart_demux_chain));
multipart->maxlen = 4096;
multipart->parsing_mime = NULL;
multipart->numpads = 0;
multipart->scanpos = 0;
multipart->lastpos = 0;
}
static void
gst_multipart_demux_finalize (GObject * object)
{
GstMultipartDemux *demux = GST_MULTIPART_DEMUX (object);
g_free (demux->prefix);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstMultipartPad *
@ -221,6 +265,8 @@ gst_multipart_find_pad_by_mime (GstMultipartDemux * demux, gchar * mime,
mppad = g_new0 (GstMultipartPad, 1);
GST_DEBUG_OBJECT (demux, "creating pad with mime: %s", mime);
name = g_strdup_printf ("src_%d", demux->numpads);
pad = gst_pad_new_from_template (gst_static_pad_template_get
(&multipart_demux_src_template_factory), name);
@ -269,6 +315,47 @@ gst_multipart_demux_chain (GstPad * pad, GstBuffer * buf)
memcpy (multipart->buffer + multipart->bufsize, data, size);
multipart->bufsize += size;
if (multipart->first_frame && multipart->autoscan) {
/* find the prefix if this is the first buffer */
/* the prefix is like --prefix\r\n */
size_t i, start;
i = 0;
start = -1;
while ((i + 1) < multipart->bufsize) {
if (-1 == start) {
if ((multipart->buffer[i] == '-') && (multipart->buffer[i + 1] == '-')) {
start = i + 2; /* discart -- */
}
} else {
/* look for \r\n or \n\n */
if ((multipart->buffer[i] == '\n') ||
((multipart->buffer[i] == '\r') &&
(multipart->buffer[i + 1] == '\n'))) {
/* found first \r\n, the prefix is from 0 to i */
g_free (multipart->prefix);
multipart->prefix =
g_strndup (multipart->buffer + start, (i - start));
multipart->prefixLen = strlen (multipart->prefix);
GST_DEBUG_OBJECT (multipart,
"set prefix to [%s]\n", multipart->prefix);
multipart->first_frame = FALSE;
break;
}
}
i++;
}
}
/* find \n */
while (multipart->scanpos < multipart->bufsize) {
if (multipart->buffer[multipart->scanpos] == '\n') {
@ -279,11 +366,12 @@ gst_multipart_demux_chain (GstPad * pad, GstBuffer * buf)
/* then scan for the boundary */
for (matchpos = 0;
multipart->scanpos + toFindLen + MAX_LINE_LEN - matchpos <
multipart->scanpos + multipart->prefixLen + MAX_LINE_LEN - matchpos <
multipart->bufsize; multipart->scanpos++) {
if (multipart->buffer[multipart->scanpos] == toFind[matchpos]) {
if (multipart->buffer[multipart->scanpos] == multipart->prefix[matchpos]) {
matchpos++;
if (matchpos == toFindLen) {
if (matchpos == multipart->prefixLen) {
int datalen;
int i, start;
gchar *mime_type;
@ -335,7 +423,7 @@ gst_multipart_demux_chain (GstPad * pad, GstBuffer * buf)
} else {
GST_BUFFER_TIMESTAMP (outbuf) = -1;
}
gst_pad_push (srcpad->pad, outbuf);
ret = gst_pad_push (srcpad->pad, outbuf);
}
}
}
@ -351,6 +439,8 @@ gst_multipart_demux_chain (GstPad * pad, GstBuffer * buf)
} else {
matchpos = 0;
}
if (ret != GST_FLOW_OK)
break;
}
gst_buffer_unref (buf);
@ -373,6 +463,11 @@ gst_multipart_demux_change_state (GstElement * element,
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
multipart->buffer = g_malloc (multipart->maxlen);
multipart->first_frame = TRUE;
multipart->parsing_mime = NULL;
multipart->numpads = 0;
multipart->scanpos = 0;
multipart->lastpos = 0;
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
@ -402,6 +497,54 @@ gst_multipart_demux_change_state (GstElement * element,
return ret;
}
static void
gst_multipart_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMultipartDemux *filter;
g_return_if_fail (GST_IS_MULTIPART_DEMUX (object));
filter = GST_MULTIPART_DEMUX (object);
switch (prop_id) {
case PROP_BOUNDARY:
g_free (filter->prefix);
filter->prefix = g_value_dup_string (value);
filter->prefixLen = strlen (filter->prefix);
break;
case PROP_AUTOSCAN:
filter->autoscan = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_multipart_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstMultipartDemux *filter;
g_return_if_fail (GST_IS_MULTIPART_DEMUX (object));
filter = GST_MULTIPART_DEMUX (object);
switch (prop_id) {
case PROP_BOUNDARY:
g_value_set_string (value, filter->prefix);
break;
case PROP_AUTOSCAN:
g_value_set_boolean (value, filter->autoscan);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
gboolean
gst_multipart_demux_plugin_init (GstPlugin * plugin)
{