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GStreamer Core Plugins 0.10 Plugins Reference Manual | ![]() |
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fakesrcfakesrc — Generate (meaningless) buffers |
GstFakeSrc; enum GstFakeSrcDataType; enum GstFakeSrcFillType; enum GstFakeSrcOutputType; enum GstFakeSrcSizeType;
"can-activate-pull" gboolean : Read / Write / Construct "can-activate-push" gboolean : Read / Write / Construct "data" GstFakeSrcDataType : Read / Write "datarate" gint : Read / Write "dump" gboolean : Read / Write "filltype" GstFakeSrcFillType : Read / Write "is-live" gboolean : Read / Write / Construct "last-message" gchararray : Read "parentsize" gint : Read / Write "pattern" gchararray : Read / Write "signal-handoffs" gboolean : Read / Write "silent" gboolean : Read / Write "sizemax" gint : Read / Write "sizemin" gint : Read / Write "sizetype" GstFakeSrcSizeType : Read / Write "sync" gboolean : Read / Write
"handoff" void user_function (GstFakeSrc *fakesrc, GstBuffer buffer, GstPad *pad, gpointer user_data);
The fakesrc element is a multipurpose element that can generate a wide range of buffers and can operate in various scheduling modes.
It is mostly used as a testing element, one trivial example for testing basic GStreamer core functionality is:
gst-launch -v fakesrc num-buffers=5 ! fakesink
This pipeline will push 5 empty buffers to the fakesink element and then sends an EOS.
Last reviewed on 2005-12-02 (0.9.7)
plugin | coreelements |
author | Erik Walthinsen <omega@cse.ogi.edu>, Wim Taymans <wim.taymans@chello.be> |
class | Source |
typedef enum { FAKE_SRC_DATA_ALLOCATE = 1, FAKE_SRC_DATA_SUBBUFFER } GstFakeSrcDataType;
The different ways buffers are allocated.
FAKE_SRC_DATA_ALLOCATE |
allocate buffers |
FAKE_SRC_DATA_SUBBUFFER |
subbuffer each buffer |
typedef enum { FAKE_SRC_FILLTYPE_NOTHING = 1, FAKE_SRC_FILLTYPE_ZERO, FAKE_SRC_FILLTYPE_RANDOM, FAKE_SRC_FILLTYPE_PATTERN, FAKE_SRC_FILLTYPE_PATTERN_CONT } GstFakeSrcFillType;
The different ways of filling the buffers.
FAKE_SRC_FILLTYPE_NOTHING |
do not fill buffers |
FAKE_SRC_FILLTYPE_ZERO |
fill buffers with 0 |
FAKE_SRC_FILLTYPE_RANDOM |
fill buffers with random bytes |
FAKE_SRC_FILLTYPE_PATTERN |
fill buffers with a pattern |
FAKE_SRC_FILLTYPE_PATTERN_CONT |
fill buffers with a continuous pattern |
typedef enum { FAKE_SRC_FIRST_LAST_LOOP = 1, FAKE_SRC_LAST_FIRST_LOOP, FAKE_SRC_PING_PONG, FAKE_SRC_ORDERED_RANDOM, FAKE_SRC_RANDOM, FAKE_SRC_PATTERN_LOOP, FAKE_SRC_PING_PONG_PATTERN, FAKE_SRC_GET_ALWAYS_SUCEEDS } GstFakeSrcOutputType;
The different output types. Unused currently.
FAKE_SRC_FIRST_LAST_LOOP |
first pad then last pad |
FAKE_SRC_LAST_FIRST_LOOP |
last pad then first pad |
FAKE_SRC_PING_PONG |
ping pong between pads |
FAKE_SRC_ORDERED_RANDOM |
ordered random pad |
FAKE_SRC_RANDOM |
random pad |
FAKE_SRC_PATTERN_LOOP |
loop between pads in a particular pattern |
FAKE_SRC_PING_PONG_PATTERN |
ping pong based on a pattern |
FAKE_SRC_GET_ALWAYS_SUCEEDS |
a get always succeeds on a pad |
typedef enum { FAKE_SRC_SIZETYPE_EMPTY = 1, FAKE_SRC_SIZETYPE_FIXED, FAKE_SRC_SIZETYPE_RANDOM } GstFakeSrcSizeType;
The different size of the allocated buffers.
FAKE_SRC_SIZETYPE_EMPTY |
create empty buffers |
FAKE_SRC_SIZETYPE_FIXED |
fixed buffer size (sizemax sized) |
FAKE_SRC_SIZETYPE_RANDOM |
random buffer size (sizemin <= size <= sizemax) |
can-activate-pull
" property"can-activate-pull" gboolean : Read / Write / Construct
Can activate in pull mode.
Default value: TRUE
can-activate-push
" property"can-activate-push" gboolean : Read / Write / Construct
Can activate in push mode.
Default value: TRUE
data
" property"data" GstFakeSrcDataType : Read / Write
Data allocation method.
Default value: Allocate data
datarate
" property"datarate" gint : Read / Write
Timestamps buffers with number of bytes per second (0 = none).
Allowed values: >= 0
Default value: 0
dump
" property"dump" gboolean : Read / Write
Dump produced bytes to stdout.
Default value: FALSE
filltype
" property"filltype" GstFakeSrcFillType : Read / Write
How to fill the buffer, if at all.
Default value: Fill buffers with zeros
is-live
" property"is-live" gboolean : Read / Write / Construct
True if the element cannot produce data in PAUSED.
Default value: FALSE
last-message
" property"last-message" gchararray : Read
The last status message.
Default value: NULL
parentsize
" property"parentsize" gint : Read / Write
Size of parent buffer for sub-buffered allocation.
Allowed values: >= 0
Default value: 40960
signal-handoffs
" property"signal-handoffs" gboolean : Read / Write
Send a signal before pushing the buffer.
Default value: FALSE
silent
" property"silent" gboolean : Read / Write
Don't produce last_message events.
Default value: FALSE
sizemax
" property"sizemax" gint : Read / Write
Maximum buffer size.
Allowed values: >= 0
Default value: 4096
sizemin
" property"sizemin" gint : Read / Write
Minimum buffer size.
Allowed values: >= 0
Default value: 0
sizetype
" property"sizetype" GstFakeSrcSizeType : Read / Write
How to determine buffer sizes.
Default value: Send empty buffers
void user_function (GstFakeSrc *fakesrc, GstBuffer buffer, GstPad *pad, gpointer user_data);
This signal gets emitted before sending the buffer.
fakesrc : |
the fakesrc instance |
buffer : |
the buffer that will be pushed |
pad : |
the pad that will sent it |
user_data : |
user data set when the signal handler was connected. |
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