static void
gst_h264_parse_init (GstH264Parse * h264parse, GstH264ParseClass * g_class)
{
h264parse->frame_out = gst_adapter_new ();
/* retrieve and intercept baseparse.
* Quite HACKish, but fairly OK since it is needed to perform avc packet
* splitting, which is the penultimate de-parsing */
h264parse->parse_chain =
GST_PAD_CHAINFUNC (GST_BASE_PARSE_SINK_PAD (h264parse));
gst_pad_set_chain_function (GST_BASE_PARSE_SINK_PAD (h264parse),
gst_h264_parse_chain);
}
static void
gst_dtsdec_init (GstDtsDec * dtsdec)
{
dtsdec->request_channels = DCA_CHANNEL;
dtsdec->dynamic_range_compression = FALSE;
/* retrieve and intercept base class chain.
* Quite HACKish, but that's dvd specs for you,
* since one buffer needs to be split into 2 frames */
dtsdec->base_chain = GST_PAD_CHAINFUNC (GST_AUDIO_DECODER_SINK_PAD (dtsdec));
gst_pad_set_chain_function (GST_AUDIO_DECODER_SINK_PAD (dtsdec),
GST_DEBUG_FUNCPTR (gst_dtsdec_chain));
}
static void
gst_a52dec_init (GstA52Dec * a52dec)
{
a52dec->request_channels = A52_CHANNEL;
a52dec->dynamic_range_compression = FALSE;
a52dec->state = NULL;
a52dec->samples = NULL;
/* retrieve and intercept base class chain.
* Quite HACKish, but that's dvd specs/caps for you,
* since one buffer needs to be split into 2 frames */
a52dec->base_chain = GST_PAD_CHAINFUNC (GST_AUDIO_DECODER_SINK_PAD (a52dec));
gst_pad_set_chain_function (GST_AUDIO_DECODER_SINK_PAD (a52dec),
GST_DEBUG_FUNCPTR (gst_a52dec_chain));
}
static void
stop_typefinding (GstTypeFindElement * typefind)
{
GstState state;
gboolean push_cached_buffers;
gst_element_get_state (GST_ELEMENT (typefind), &state, NULL, 0);
push_cached_buffers = (state >= GST_STATE_PAUSED);
GST_DEBUG_OBJECT (typefind, "stopping typefinding%s",
push_cached_buffers ? " and pushing cached buffers" : "");
if (typefind->store) {
if (!push_cached_buffers) {
gst_buffer_unref (typefind->store);
} else {
GstPad *peer = gst_pad_get_peer (typefind->src);
typefind->mode = MODE_NORMAL;
gst_buffer_set_caps (typefind->store, typefind->caps);
/* make sure the user gets a meaningful error message in this case,
* which is not a core bug or bug of any kind (as the default error
* message emitted by gstpad.c otherwise would make you think) */
if (peer && GST_PAD_CHAINFUNC (peer) == NULL) {
GST_DEBUG_OBJECT (typefind, "upstream only supports push mode, while "
"downstream element only works in pull mode, erroring out");
GST_ELEMENT_ERROR (typefind, STREAM, FAILED,
("%s cannot work in push mode. The operation is not supported "
"with this source element or protocol.",
G_OBJECT_TYPE_NAME (GST_PAD_PARENT (peer))),
("Downstream pad %s:%s has no chainfunction, and the upstream "
"element does not support pull mode",
GST_DEBUG_PAD_NAME (peer)));
typefind->mode = MODE_ERROR; /* make the chain function error out */
} else {
gst_type_find_element_send_cached_events (typefind);
gst_pad_push (typefind->src, typefind->store);
}
if (peer)
gst_object_unref (peer);
}
typefind->store = NULL;
}
}
static void
link_element_to_tee (GstElement * tee, GstElement * element)
{
GstPad *tee_src = gst_element_get_request_pad (tee, "src_%u");
GstPad *element_sink = gst_element_get_static_pad (element, "sink");
GstPadLinkReturn ret;
GstPadChainFunction old_func;
/*
* HACK Add a custom chain function that does not return error, this way
* we avoid race conditions produced by reconnect events not using the stream
* lock
*/
old_func = GST_PAD_CHAINFUNC (element_sink);
if (old_func != NULL) {
if (old_func != no_fail_chain) {
g_object_set_data (G_OBJECT (element_sink), OLD_CHAIN_KEY, old_func);
}
gst_pad_set_chain_function (element_sink, no_fail_chain);
}
remove_element_on_unlinked (element, "src", "sink");
g_signal_connect (tee_src, "unlinked", G_CALLBACK (remove_tee_pad_on_unlink),
NULL);
gst_pad_add_probe (tee_src, GST_PAD_PROBE_TYPE_EVENT_UPSTREAM, tee_src_probe,
NULL, NULL);
ret = gst_pad_link_full (tee_src, element_sink, GST_PAD_LINK_CHECK_NOTHING);
if (G_UNLIKELY (GST_PAD_LINK_FAILED (ret))) {
GST_ERROR ("Linking %" GST_PTR_FORMAT " with %" GST_PTR_FORMAT " result %d",
tee_src, element_sink, ret);
}
g_object_unref (element_sink);
g_object_unref (tee_src);
}
static void
stop_typefinding (GstTypeFindElement * typefind)
{
GstState state;
gboolean push_cached_buffers;
gsize avail;
GstBuffer *buffer;
GstClockTime pts, dts;
gst_element_get_state (GST_ELEMENT (typefind), &state, NULL, 0);
push_cached_buffers = (state >= GST_STATE_PAUSED && typefind->caps);
GST_DEBUG_OBJECT (typefind, "stopping typefinding%s",
push_cached_buffers ? " and pushing cached events and buffers" : "");
typefind->mode = MODE_NORMAL;
if (push_cached_buffers)
gst_type_find_element_send_cached_events (typefind);
GST_OBJECT_LOCK (typefind);
avail = gst_adapter_available (typefind->adapter);
if (avail == 0)
goto no_data;
pts = gst_adapter_prev_pts (typefind->adapter, NULL);
dts = gst_adapter_prev_dts (typefind->adapter, NULL);
buffer = gst_adapter_take_buffer (typefind->adapter, avail);
GST_BUFFER_PTS (buffer) = pts;
GST_BUFFER_DTS (buffer) = dts;
GST_BUFFER_OFFSET (buffer) = typefind->initial_offset;
GST_OBJECT_UNLOCK (typefind);
if (!push_cached_buffers) {
gst_buffer_unref (buffer);
} else {
GstPad *peer = gst_pad_get_peer (typefind->src);
/* make sure the user gets a meaningful error message in this case,
* which is not a core bug or bug of any kind (as the default error
* message emitted by gstpad.c otherwise would make you think) */
if (peer && GST_PAD_CHAINFUNC (peer) == NULL) {
GST_DEBUG_OBJECT (typefind, "upstream only supports push mode, while "
"downstream element only works in pull mode, erroring out");
GST_ELEMENT_ERROR (typefind, STREAM, FAILED,
("%s cannot work in push mode. The operation is not supported "
"with this source element or protocol.",
G_OBJECT_TYPE_NAME (GST_PAD_PARENT (peer))),
("Downstream pad %s:%s has no chainfunction, and the upstream "
"element does not support pull mode", GST_DEBUG_PAD_NAME (peer)));
typefind->mode = MODE_ERROR; /* make the chain function error out */
gst_buffer_unref (buffer);
} else {
gst_pad_push (typefind->src, buffer);
}
if (peer)
gst_object_unref (peer);
}
return;
/* ERRORS */
no_data:
{
GST_DEBUG_OBJECT (typefind, "we have no data to typefind");
GST_OBJECT_UNLOCK (typefind);
return;
}
}
