static gboolean
gst_rtp_dtmf_src_query (GstBaseSrc * basesrc, GstQuery * query)
{
GstRTPDTMFSrc *dtmfsrc = GST_RTP_DTMF_SRC (basesrc);
gboolean res = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime latency;
latency = dtmfsrc->ptime * GST_MSECOND;
gst_query_set_latency (query, gst_base_src_is_live (basesrc), latency,
GST_CLOCK_TIME_NONE);
GST_DEBUG_OBJECT (dtmfsrc, "Reporting latency of %" GST_TIME_FORMAT,
GST_TIME_ARGS (latency));
res = TRUE;
}
break;
default:
res = GST_BASE_SRC_CLASS (gst_rtp_dtmf_src_parent_class)->query (basesrc,
query);
break;
}
return res;
}
static gboolean
gst_mio_video_src_query (GstBaseSrc * basesrc, GstQuery * query)
{
GstMIOVideoSrc *self = GST_MIO_VIDEO_SRC_CAST (basesrc);
gboolean result = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
GstClockTime min_latency, max_latency;
if (self->device == NULL)
goto beach;
if (gst_mio_video_device_get_selected_format (self->device) == NULL)
goto beach;
min_latency = max_latency =
gst_mio_video_device_get_duration (self->device);
GST_DEBUG_OBJECT (self, "reporting latency of min %" GST_TIME_FORMAT
" max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
gst_query_set_latency (query, TRUE, min_latency, max_latency);
result = TRUE;
break;
}
default:
result = GST_BASE_SRC_CLASS (parent_class)->query (basesrc, query);
break;
}
beach:
return result;
}
static gboolean
gst_wasapi_src_query (GstBaseSrc * src, GstQuery * query)
{
GstWasapiSrc *self = GST_WASAPI_SRC (src);
gboolean ret = FALSE;
GST_DEBUG_OBJECT (self, "query for %s",
gst_query_type_get_name (GST_QUERY_TYPE (query)));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
GstClockTime min_latency, max_latency;
min_latency = self->latency + self->period_time;
max_latency = min_latency;
GST_DEBUG_OBJECT (self, "reporting latency of min %" GST_TIME_FORMAT
" max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
gst_query_set_latency (query, TRUE, min_latency, max_latency);
ret = TRUE;
break;
}
default:
ret = GST_BASE_SRC_CLASS (parent_class)->query (src, query);
break;
}
return ret;
}
static gboolean
gst_rdt_manager_query_src (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstRDTManager *rdtmanager;
gboolean res;
rdtmanager = GST_RDT_MANAGER (parent);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime latency;
latency = rdtmanager->latency * GST_MSECOND;
/* we pretend to be live with a 3 second latency */
gst_query_set_latency (query, TRUE, latency, -1);
GST_DEBUG_OBJECT (rdtmanager, "reporting %" GST_TIME_FORMAT " of latency",
GST_TIME_ARGS (latency));
res = TRUE;
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
return res;
}
static gboolean
gst_cel_video_src_query (GstBaseSrc * basesrc, GstQuery * query)
{
GstCelVideoSrc *self = GST_CEL_VIDEO_SRC_CAST (basesrc);
gboolean result = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
GstClockTime min_latency, max_latency;
if (self->device == NULL || !GST_CLOCK_TIME_IS_VALID (self->duration))
goto beach;
min_latency = max_latency = self->duration;
GST_DEBUG_OBJECT (self, "reporting latency of min %" GST_TIME_FORMAT
" max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
gst_query_set_latency (query, TRUE, min_latency, max_latency);
result = TRUE;
break;
}
default:
result = GST_BASE_SRC_CLASS (parent_class)->query (basesrc, query);
break;
}
beach:
return result;
}
static gboolean
gst_app_src_query (GstBaseSrc * src, GstQuery * query)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (src);
GstAppSrcPrivate *priv = appsrc->priv;
gboolean res;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime min, max;
gboolean live;
/* Query the parent class for the defaults */
res = gst_base_src_query_latency (src, &live, &min, &max);
/* overwrite with our values when we need to */
g_mutex_lock (priv->mutex);
if (priv->min_latency != -1)
min = priv->min_latency;
if (priv->max_latency != -1)
max = priv->max_latency;
g_mutex_unlock (priv->mutex);
gst_query_set_latency (query, live, min, max);
break;
}
default:
res = GST_BASE_SRC_CLASS (parent_class)->query (src, query);
break;
}
return res;
}
static gboolean
gst_decklink_video_src_query (GstBaseSrc * bsrc, GstQuery * query)
{
GstDecklinkVideoSrc *self = GST_DECKLINK_VIDEO_SRC_CAST (bsrc);
gboolean ret = TRUE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
if (self->input) {
GstClockTime min, max;
const GstDecklinkMode *mode;
g_mutex_lock (&self->lock);
mode = gst_decklink_get_mode (self->caps_mode);
g_mutex_unlock (&self->lock);
min = gst_util_uint64_scale_ceil (GST_SECOND, mode->fps_d, mode->fps_n);
max = self->buffer_size * min;
gst_query_set_latency (query, TRUE, min, max);
ret = TRUE;
} else {
ret = FALSE;
}
break;
}
default:
ret = GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
break;
}
return ret;
}
static gboolean
gst_niimaqsrc_query (GstBaseSrc * bsrc, GstQuery * query)
{
GstNiImaqSrc *src = GST_NIIMAQSRC (bsrc);
gboolean res;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
if (!src->session_started) {
GST_WARNING_OBJECT (src, "Can't give latency since device isn't open!");
res = FALSE;
} else {
GstClockTime min_latency, max_latency;
/* TODO: this is a ballpark figure, estimate from FVAL times */
min_latency = 33 * GST_MSECOND;
max_latency = 33 * GST_MSECOND * src->bufsize;
GST_LOG_OBJECT (src,
"report latency min %" GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
gst_query_set_latency (query, TRUE, min_latency, max_latency);
res = TRUE;
}
}
default:
res =
GST_BASE_SRC_CLASS (gst_niimaqsrc_parent_class)->query (bsrc, query);
break;
}
return res;
}
static gboolean
gst_inter_audio_src_query (GstBaseSrc * src, GstQuery * query)
{
GstInterAudioSrc *interaudiosrc = GST_INTER_AUDIO_SRC (src);
gboolean ret;
GST_DEBUG_OBJECT (src, "query");
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
GstClockTime min_latency, max_latency;
min_latency = interaudiosrc->latency_time;
max_latency = interaudiosrc->buffer_time;
GST_DEBUG_OBJECT (src,
"report latency min %" GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
gst_query_set_latency (query,
gst_base_src_is_live (src), min_latency, max_latency);
ret = TRUE;
break;
}
default:
ret = GST_BASE_SRC_CLASS (gst_inter_audio_src_parent_class)->query (src,
query);
break;
}
return ret;
}
static gboolean
gst_ks_video_src_query (GstBaseSrc * basesrc, GstQuery * query)
{
GstKsVideoSrc *self = GST_KS_VIDEO_SRC (basesrc);
GstKsVideoSrcPrivate *priv = GST_KS_VIDEO_SRC_GET_PRIVATE (self);
gboolean result = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
GstClockTime min_latency, max_latency;
if (priv->device == NULL)
goto beach;
result = gst_ks_video_device_get_latency (priv->device, &min_latency,
&max_latency);
if (!result)
goto beach;
GST_DEBUG_OBJECT (self, "reporting latency of min %" GST_TIME_FORMAT
" max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
gst_query_set_latency (query, TRUE, min_latency, max_latency);
break;
}
default:
result = GST_BASE_SRC_CLASS (parent_class)->query (basesrc, query);
break;
}
beach:
return result;
}
static gboolean
gst_goom_src_query (GstPad * pad, GstQuery * query)
{
gboolean res = FALSE;
GstGoom *goom;
goom = GST_GOOM (gst_pad_get_parent (pad));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
/* We need to send the query upstream and add the returned latency to our
* own */
GstClockTime min_latency, max_latency;
gboolean us_live;
GstClockTime our_latency;
guint max_samples;
if (goom->rate == 0)
break;
if ((res = gst_pad_peer_query (goom->sinkpad, query))) {
gst_query_parse_latency (query, &us_live, &min_latency, &max_latency);
GST_DEBUG_OBJECT (goom, "Peer latency: min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
/* the max samples we must buffer buffer */
max_samples = MAX (GOOM_SAMPLES, goom->spf);
our_latency =
gst_util_uint64_scale_int (max_samples, GST_SECOND, goom->rate);
GST_DEBUG_OBJECT (goom, "Our latency: %" GST_TIME_FORMAT,
GST_TIME_ARGS (our_latency));
/* we add some latency but only if we need to buffer more than what
* upstream gives us */
min_latency += our_latency;
if (max_latency != -1)
max_latency += our_latency;
GST_DEBUG_OBJECT (goom, "Calculated total latency : min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
gst_query_set_latency (query, TRUE, min_latency, max_latency);
}
break;
}
default:
res = gst_pad_peer_query (goom->sinkpad, query);
break;
}
gst_object_unref (goom);
return res;
}
static gboolean
audioresample_query (GstPad * pad, GstQuery * query)
{
GstAudioresample *audioresample =
GST_AUDIORESAMPLE (gst_pad_get_parent (pad));
GstBaseTransform *trans = GST_BASE_TRANSFORM (audioresample);
gboolean res = TRUE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime min, max;
gboolean live;
guint64 latency;
GstPad *peer;
gint rate = audioresample->i_rate;
gint resampler_latency = audioresample->filter_length / 2;
if (gst_base_transform_is_passthrough (trans))
resampler_latency = 0;
if ((peer = gst_pad_get_peer (trans->sinkpad))) {
if ((res = gst_pad_query (peer, query))) {
gst_query_parse_latency (query, &live, &min, &max);
GST_DEBUG ("Peer latency: min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min), GST_TIME_ARGS (max));
/* add our own latency */
if (rate != 0 && resampler_latency != 0)
latency =
gst_util_uint64_scale (resampler_latency, GST_SECOND, rate);
else
latency = 0;
GST_DEBUG ("Our latency: %" GST_TIME_FORMAT, GST_TIME_ARGS (latency));
min += latency;
if (max != GST_CLOCK_TIME_NONE)
max += latency;
GST_DEBUG ("Calculated total latency : min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min), GST_TIME_ARGS (max));
gst_query_set_latency (query, live, min, max);
}
gst_object_unref (peer);
}
break;
}
default:
res = gst_pad_query_default (pad, query);
break;
}
gst_object_unref (audioresample);
return res;
}
static gboolean
gst_audio_fx_base_fir_filter_query (GstPad * pad, GstQuery * query)
{
GstAudioFXBaseFIRFilter *self =
GST_AUDIO_FX_BASE_FIR_FILTER (gst_pad_get_parent (pad));
gboolean res = TRUE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime min, max;
gboolean live;
guint64 latency;
GstPad *peer;
gint rate = GST_AUDIO_FILTER (self)->format.rate;
if (rate == 0) {
res = FALSE;
} else if ((peer = gst_pad_get_peer (GST_BASE_TRANSFORM (self)->sinkpad))) {
if ((res = gst_pad_query (peer, query))) {
gst_query_parse_latency (query, &live, &min, &max);
GST_DEBUG_OBJECT (self, "Peer latency: min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min), GST_TIME_ARGS (max));
if (self->fft && !self->low_latency)
latency = self->block_length - self->kernel_length + 1;
else
latency = self->latency;
/* add our own latency */
latency = gst_util_uint64_scale_round (latency, GST_SECOND, rate);
GST_DEBUG_OBJECT (self, "Our latency: %"
GST_TIME_FORMAT, GST_TIME_ARGS (latency));
min += latency;
if (max != GST_CLOCK_TIME_NONE)
max += latency;
GST_DEBUG_OBJECT (self, "Calculated total latency : min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min), GST_TIME_ARGS (max));
gst_query_set_latency (query, live, min, max);
}
gst_object_unref (peer);
}
break;
}
default:
res = gst_pad_query_default (pad, query);
break;
}
gst_object_unref (self);
return res;
}
static gboolean
gst_inter_audio_sink_query (GstBaseSink * sink, GstQuery * query)
{
GstInterAudioSink *interaudiosink = GST_INTER_AUDIO_SINK (sink);
gboolean ret;
GST_DEBUG_OBJECT (sink, "query");
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
gboolean live, us_live;
GstClockTime min_l, max_l;
GST_DEBUG_OBJECT (sink, "latency query");
if ((ret =
gst_base_sink_query_latency (GST_BASE_SINK_CAST (sink), &live,
&us_live, &min_l, &max_l))) {
GstClockTime base_latency, min_latency, max_latency;
/* we and upstream are both live, adjust the min_latency */
if (live && us_live) {
/* FIXME: The other side can change this value when it starts */
base_latency = interaudiosink->surface->audio_latency_time;
/* we cannot go lower than the buffer size and the min peer latency */
min_latency = base_latency + min_l;
/* the max latency is the max of the peer, we can delay an infinite
* amount of time. */
max_latency = (max_l == -1) ? -1 : (base_latency + max_l);
GST_DEBUG_OBJECT (sink,
"peer min %" GST_TIME_FORMAT ", our min latency: %"
GST_TIME_FORMAT, GST_TIME_ARGS (min_l),
GST_TIME_ARGS (min_latency));
GST_DEBUG_OBJECT (sink,
"peer max %" GST_TIME_FORMAT ", our max latency: %"
GST_TIME_FORMAT, GST_TIME_ARGS (max_l),
GST_TIME_ARGS (max_latency));
} else {
GST_DEBUG_OBJECT (sink,
"peer or we are not live, don't care about latency");
min_latency = min_l;
max_latency = max_l;
}
gst_query_set_latency (query, live, min_latency, max_latency);
}
break;
}
default:
ret =
GST_BASE_SINK_CLASS (gst_inter_audio_sink_parent_class)->query (sink,
query);
break;
}
return ret;
}
static gboolean
gst_base_video_encoder_src_query (GstPad * pad, GstQuery * query)
{
GstBaseVideoEncoder *enc;
gboolean res;
GstPad *peerpad;
enc = GST_BASE_VIDEO_ENCODER (gst_pad_get_parent (pad));
peerpad = gst_pad_get_peer (GST_BASE_VIDEO_CODEC_SINK_PAD (enc));
switch GST_QUERY_TYPE
(query) {
case GST_QUERY_CONVERT:
{
GstFormat src_fmt, dest_fmt;
gint64 src_val, dest_val;
gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
res =
gst_base_video_encoded_video_convert (&GST_BASE_VIDEO_CODEC
(enc)->state, src_fmt, src_val, &dest_fmt, &dest_val);
if (!res)
goto error;
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
break;
}
case GST_QUERY_LATENCY:
{
gboolean live;
GstClockTime min_latency, max_latency;
res = gst_pad_query (peerpad, query);
if (res) {
gst_query_parse_latency (query, &live, &min_latency, &max_latency);
min_latency += enc->min_latency;
if (max_latency != GST_CLOCK_TIME_NONE) {
max_latency += enc->max_latency;
}
gst_query_set_latency (query, live, min_latency, max_latency);
}
}
break;
default:
res = gst_pad_query_default (pad, query);
}
gst_object_unref (peerpad);
gst_object_unref (enc);
return res;
error:
GST_DEBUG_OBJECT (enc, "query failed");
gst_object_unref (peerpad);
gst_object_unref (enc);
return res;
}
static gboolean
gst_rtp_jitter_buffer_query (GstPad * pad, GstQuery * query)
{
GstRtpJitterBuffer *jitterbuffer;
GstRtpJitterBufferPrivate *priv;
gboolean res = FALSE;
jitterbuffer = GST_RTP_JITTER_BUFFER (gst_pad_get_parent (pad));
priv = jitterbuffer->priv;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
/* We need to send the query upstream and add the returned latency to our
* own */
GstClockTime min_latency, max_latency;
gboolean us_live;
GstClockTime our_latency;
if ((res = gst_pad_peer_query (priv->sinkpad, query))) {
gst_query_parse_latency (query, &us_live, &min_latency, &max_latency);
GST_DEBUG_OBJECT (jitterbuffer, "Peer latency: min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
/* store this so that we can safely sync on the peer buffers. */
JBUF_LOCK (priv);
priv->peer_latency = min_latency;
our_latency = ((guint64) priv->latency_ms) * GST_MSECOND;
JBUF_UNLOCK (priv);
GST_DEBUG_OBJECT (jitterbuffer, "Our latency: %" GST_TIME_FORMAT,
GST_TIME_ARGS (our_latency));
/* we add some latency but can buffer an infinite amount of time */
min_latency += our_latency;
max_latency = -1;
GST_DEBUG_OBJECT (jitterbuffer, "Calculated total latency : min %"
GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
gst_query_set_latency (query, TRUE, min_latency, max_latency);
}
break;
}
default:
res = gst_pad_query_default (pad, query);
break;
}
gst_object_unref (jitterbuffer);
return res;
}
static gboolean
gst_dc1394_query (GstBaseSrc * bsrc, GstQuery * query)
{
gboolean res = TRUE;
GstDc1394 *src = GST_DC1394 (bsrc);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime min_latency, max_latency;
if (!src->camera) {
GST_WARNING_OBJECT (src,
"Can't give latency since device isn't open !");
res = FALSE;
goto done;
}
if (src->rate_denominator <= 0 || src->rate_numerator <= 0) {
GST_WARNING_OBJECT (bsrc,
"Can't give latency since framerate isn't fixated !");
res = FALSE;
goto done;
}
/* min latency is the time to capture one frame */
min_latency = gst_util_uint64_scale (GST_SECOND,
src->rate_denominator, src->rate_numerator);
/* max latency is total duration of the frame buffer */
max_latency = gst_util_uint64_scale (src->bufsize,
GST_SECOND * src->rate_denominator, src->rate_numerator);
GST_DEBUG_OBJECT (bsrc,
"report latency min %" GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
/* we are always live, the min latency is 1 frame and the max latency is
* the complete buffer of frames. */
gst_query_set_latency (query, TRUE, min_latency, max_latency);
res = TRUE;
break;
}
default:
res = GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
break;
}
done:
return res;
}
static gboolean
gst_decklink_src_video_src_query (GstPad * pad, GstObject * parent,
GstQuery * query)
{
GstDecklinkSrc *decklinksrc;
gboolean ret = FALSE;
decklinksrc = GST_DECKLINK_SRC (parent);
GST_DEBUG_OBJECT (pad, "query: %" GST_PTR_FORMAT, query);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
GstClockTime min_latency, max_latency;
const GstDecklinkMode *mode;
/* device must be open */
if (decklinksrc->decklink == NULL) {
GST_WARNING_OBJECT (decklinksrc,
"Can't give latency since device isn't open !");
goto done;
}
mode = gst_decklink_get_mode (decklinksrc->mode);
/* min latency is the time to capture one frame */
min_latency =
gst_util_uint64_scale_int (GST_SECOND, mode->fps_d, mode->fps_n);
/* max latency is total duration of the frame buffer */
max_latency = 2 * min_latency;
GST_DEBUG_OBJECT (decklinksrc,
"report latency min %" GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
/* we are always live, the min latency is 1 frame and the max latency is
* the complete buffer of frames. */
gst_query_set_latency (query, TRUE, min_latency, max_latency);
ret = TRUE;
break;
}
default:
ret = gst_pad_query_default (pad, parent, query);
break;
}
done:
return ret;
}
static gboolean
gst_app_src_query (GstBaseSrc * src, GstQuery * query)
{
GstAppSrc *appsrc = GST_APP_SRC_CAST (src);
GstAppSrcPrivate *priv = appsrc->priv;
gboolean res;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime min, max;
gboolean live;
/* Query the parent class for the defaults */
res = gst_base_src_query_latency (src, &live, &min, &max);
/* overwrite with our values when we need to */
g_mutex_lock (&priv->mutex);
if (priv->min_latency != -1)
min = priv->min_latency;
if (priv->max_latency != -1)
max = priv->max_latency;
g_mutex_unlock (&priv->mutex);
gst_query_set_latency (query, live, min, max);
break;
}
case GST_QUERY_SCHEDULING:
{
gst_query_set_scheduling (query, GST_SCHEDULING_FLAG_SEEKABLE, 1, -1, 0);
gst_query_add_scheduling_mode (query, GST_PAD_MODE_PUSH);
switch (priv->stream_type) {
case GST_APP_STREAM_TYPE_STREAM:
case GST_APP_STREAM_TYPE_SEEKABLE:
break;
case GST_APP_STREAM_TYPE_RANDOM_ACCESS:
gst_query_add_scheduling_mode (query, GST_PAD_MODE_PULL);
break;
}
res = TRUE;
break;
}
default:
res = GST_BASE_SRC_CLASS (parent_class)->query (src, query);
break;
}
return res;
}
static gboolean
gst_base_audio_src_query (GstBaseSrc * bsrc, GstQuery * query)
{
GstBaseAudioSrc *src = GST_BASE_AUDIO_SRC (bsrc);
gboolean res = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime min_latency, max_latency;
GstRingBufferSpec *spec;
GST_OBJECT_LOCK (src);
if (G_UNLIKELY (src->ringbuffer == NULL
|| src->ringbuffer->spec.rate == 0)) {
GST_OBJECT_UNLOCK (src);
goto done;
}
spec = &src->ringbuffer->spec;
/* we have at least 1 segment of latency */
min_latency =
gst_util_uint64_scale_int (spec->segsize, GST_SECOND,
spec->rate * spec->bytes_per_sample);
/* we cannot delay more than the buffersize else we lose data */
max_latency =
gst_util_uint64_scale_int (spec->segtotal * spec->segsize, GST_SECOND,
spec->rate * spec->bytes_per_sample);
GST_OBJECT_UNLOCK (src);
GST_DEBUG_OBJECT (src,
"report latency min %" GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
/* we are always live, the min latency is 1 segment and the max latency is
* the complete buffer of segments. */
gst_query_set_latency (query, TRUE, min_latency, max_latency);
res = TRUE;
break;
}
default:
res = GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
break;
}
done:
return res;
}
static GstPadProbeReturn
cb_latency (GstPad * pad, GstPadProbeInfo * info, gpointer data)
{
if (GST_QUERY_TYPE (GST_PAD_PROBE_INFO_QUERY (info)) != GST_QUERY_LATENCY) {
return GST_PAD_PROBE_OK;
}
GST_LOG_OBJECT (pad, "Modifing latency query. New latency %" G_GUINT64_FORMAT,
(guint64) (LATENCY * GST_MSECOND));
gst_query_set_latency (GST_PAD_PROBE_INFO_QUERY (info),
TRUE, 0, LATENCY * GST_MSECOND);
return GST_PAD_PROBE_HANDLED;
}
static gboolean
gst_v4lsrc_query (GstBaseSrc * bsrc, GstQuery * query)
{
GstV4lSrc *v4lsrc;
gboolean res = FALSE;
v4lsrc = GST_V4LSRC (bsrc);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime min_latency, max_latency;
gint fps_n, fps_d;
/* device must be open */
if (!GST_V4L_IS_OPEN (v4lsrc))
goto done;
/* we must have a framerate */
if (!(res = gst_v4lsrc_get_fps (v4lsrc, &fps_n, &fps_d)))
goto done;
/* min latency is the time to capture one frame */
min_latency = gst_util_uint64_scale_int (GST_SECOND, fps_d, fps_n);
/* max latency is total duration of the frame buffer */
max_latency = v4lsrc->mbuf.frames * min_latency;
GST_DEBUG_OBJECT (bsrc,
"report latency min %" GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
/* we are always live, the min latency is 1 frame and the max latency is
* the complete buffer of frames. */
gst_query_set_latency (query, TRUE, min_latency, max_latency);
res = TRUE;
break;
}
default:
res = GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
break;
}
done:
return res;
}
static gboolean
kms_agnostic_bin2_sink_query (GstPad * pad, GstObject * parent,
GstQuery * query)
{
gboolean ret;
ret = gst_pad_query_default (pad, parent, query);
if (ret && GST_QUERY_TYPE (query) == GST_QUERY_LATENCY) {
GstClockTime min_latency;
GstClockTime max_latency;
gst_query_parse_latency (query, NULL, &min_latency, &max_latency);
gst_query_set_latency (query, TRUE, min_latency, max_latency);
}
return ret;
}
static gboolean
gst_rtp_dec_query_src (GstPad * pad, GstObject * parent, GstQuery * query)
{
gboolean res;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
/* we pretend to be live with a 3 second latency */
gst_query_set_latency (query, TRUE, 3 * GST_SECOND, -1);
res = TRUE;
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
return res;
}
static gboolean
gst_aggregator_query_latency (GstAggregator * self, GstQuery * query)
{
LatencyData data;
data.min = 0;
data.max = GST_CLOCK_TIME_NONE;
data.live = FALSE;
/* query upstream's latency */
gst_aggregator_iterate_sinkpads (self,
(GstAggregatorPadForeachFunc) _latency_query, &data);
if (data.live && GST_CLOCK_TIME_IS_VALID (self->timeout) &&
self->timeout > data.max) {
GST_ELEMENT_WARNING (self, CORE, NEGOTIATION,
("%s", "Timeout too big"),
("The requested timeout value is too big for the latency in the "
"current pipeline. Limiting to %" G_GINT64_FORMAT, data.max));
self->timeout = data.max;
}
self->priv->latency_live = data.live;
self->priv->latency_min = data.min;
self->priv->latency_max = data.max;
/* add our own */
if (GST_CLOCK_TIME_IS_VALID (self->timeout)) {
if (GST_CLOCK_TIME_IS_VALID (data.min))
data.min += self->timeout;
if (GST_CLOCK_TIME_IS_VALID (data.max))
data.max += self->timeout;
}
GST_DEBUG_OBJECT (self, "configured latency live:%s min:%" G_GINT64_FORMAT
" max:%" G_GINT64_FORMAT, data.live ? "true" : "false", data.min,
data.max);
gst_query_set_latency (query, data.live, data.min, data.max);
return TRUE;
}
static gboolean
gst_osx_video_src_query (GstBaseSrc * bsrc, GstQuery * query)
{
GstOSXVideoSrc *self;
gboolean res = FALSE;
self = GST_OSX_VIDEO_SRC (bsrc);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
GstClockTime min_latency, max_latency;
gint fps_n, fps_d;
fps_n = FRAMERATE;
fps_d = 1;
/* min latency is the time to capture one frame */
min_latency = gst_util_uint64_scale_int (GST_SECOND, fps_d, fps_n);
/* max latency is total duration of the frame buffer */
// FIXME: we don't know what this is, so we'll just say 2 frames
max_latency = 2 * min_latency;
GST_DEBUG_OBJECT (bsrc,
"report latency min %" GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
/* we are always live, the min latency is 1 frame and the max latency is
* the complete buffer of frames. */
gst_query_set_latency (query, TRUE, min_latency, max_latency);
res = TRUE;
break;
}
default:
res = GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
break;
}
return res;
}
static gboolean
gst_identity_query (GstBaseTransform * base, GstPadDirection direction,
GstQuery * query)
{
GstIdentity *identity;
gboolean ret;
identity = GST_IDENTITY (base);
ret = GST_BASE_TRANSFORM_CLASS (parent_class)->query (base, direction, query);
if (GST_QUERY_TYPE (query) == GST_QUERY_LATENCY) {
gboolean live = FALSE;
GstClockTime min = 0, max = 0;
if (ret) {
gst_query_parse_latency (query, &live, &min, &max);
if (identity->sync && max < min) {
GST_ELEMENT_WARNING (base, CORE, CLOCK, (NULL),
("Impossible to configure latency before identity sync=true:"
" max %" GST_TIME_FORMAT " < min %"
GST_TIME_FORMAT ". Add queues or other buffering elements.",
GST_TIME_ARGS (max), GST_TIME_ARGS (min)));
}
}
/* Ignore the upstream latency if it is not live */
GST_OBJECT_LOCK (identity);
if (live)
identity->upstream_latency = min;
else
identity->upstream_latency = 0;
GST_OBJECT_UNLOCK (identity);
gst_query_set_latency (query, live || identity->sync, min, max);
ret = TRUE;
}
return ret;
}
static gboolean
gst_rtp_ssrc_demux_src_query (GstPad * pad, GstObject * parent,
GstQuery * query)
{
GstRtpSsrcDemux *demux;
gboolean res = FALSE;
demux = GST_RTP_SSRC_DEMUX (parent);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:
{
if ((res = gst_pad_peer_query (demux->rtp_sink, query))) {
gboolean live;
GstClockTime min_latency, max_latency;
GstRtpSsrcDemuxPad *demuxpad;
demuxpad = gst_pad_get_element_private (pad);
gst_query_parse_latency (query, &live, &min_latency, &max_latency);
GST_DEBUG_OBJECT (demux, "peer min latency %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency));
GST_DEBUG_OBJECT (demux, "latency for SSRC %08x", demuxpad->ssrc);
gst_query_set_latency (query, live, min_latency, max_latency);
}
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
return res;
}
static gboolean
gst_adder_query_latency (GstAdder * adder, GstQuery * query)
{
GstClockTime min, max;
gboolean live;
gboolean res;
GstIterator *it;
gboolean done;
res = TRUE;
done = FALSE;
live = FALSE;
min = 0;
max = GST_CLOCK_TIME_NONE;
/* Take maximum of all latency values */
it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (adder));
while (!done) {
GstIteratorResult ires;
gpointer item;
ires = gst_iterator_next (it, &item);
switch (ires) {
case GST_ITERATOR_DONE:
done = TRUE;
break;
case GST_ITERATOR_OK:
{
GstPad *pad = GST_PAD_CAST (item);
GstQuery *peerquery;
GstClockTime min_cur, max_cur;
gboolean live_cur;
peerquery = gst_query_new_latency ();
/* Ask peer for latency */
res &= gst_pad_peer_query (pad, peerquery);
/* take max from all valid return values */
if (res) {
gst_query_parse_latency (peerquery, &live_cur, &min_cur, &max_cur);
if (min_cur > min)
min = min_cur;
if (max_cur != GST_CLOCK_TIME_NONE &&
((max != GST_CLOCK_TIME_NONE && max_cur > max) ||
(max == GST_CLOCK_TIME_NONE)))
max = max_cur;
live = live || live_cur;
}
gst_query_unref (peerquery);
gst_object_unref (pad);
break;
}
case GST_ITERATOR_RESYNC:
live = FALSE;
min = 0;
max = GST_CLOCK_TIME_NONE;
res = TRUE;
gst_iterator_resync (it);
break;
default:
res = FALSE;
done = TRUE;
break;
}
}
gst_iterator_free (it);
if (res) {
/* store the results */
GST_DEBUG_OBJECT (adder, "Calculated total latency: live %s, min %"
GST_TIME_FORMAT ", max %" GST_TIME_FORMAT,
(live ? "yes" : "no"), GST_TIME_ARGS (min), GST_TIME_ARGS (max));
gst_query_set_latency (query, live, min, max);
}
return res;
}
static gboolean
gst_v4l2src_query (GstBaseSrc * bsrc, GstQuery * query)
{
GstV4l2Src *src;
GstV4l2Object *obj;
gboolean res = FALSE;
src = GST_V4L2SRC (bsrc);
obj = src->v4l2object;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_LATENCY:{
GstClockTime min_latency, max_latency;
guint32 fps_n, fps_d;
guint num_buffers = 0;
/* device must be open */
if (!GST_V4L2_IS_OPEN (obj)) {
GST_WARNING_OBJECT (src,
"Can't give latency since device isn't open !");
goto done;
}
fps_n = GST_V4L2_FPS_N (obj);
fps_d = GST_V4L2_FPS_D (obj);
/* we must have a framerate */
if (fps_n <= 0 || fps_d <= 0) {
GST_WARNING_OBJECT (src,
"Can't give latency since framerate isn't fixated !");
goto done;
}
/* min latency is the time to capture one frame */
min_latency = gst_util_uint64_scale_int (GST_SECOND, fps_d, fps_n);
/* max latency is total duration of the frame buffer */
if (obj->pool != NULL)
num_buffers = GST_V4L2_BUFFER_POOL_CAST (obj->pool)->max_latency;
if (num_buffers == 0)
max_latency = -1;
else
max_latency = num_buffers * min_latency;
GST_DEBUG_OBJECT (bsrc,
"report latency min %" GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
/* we are always live, the min latency is 1 frame and the max latency is
* the complete buffer of frames. */
gst_query_set_latency (query, TRUE, min_latency, max_latency);
res = TRUE;
break;
}
default:
res = GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
break;
}
done:
return res;
}
