static gboolean
gst_v4l2_video_dec_stop (GstVideoDecoder * decoder)
{
GstV4l2VideoDec *self = GST_V4L2_VIDEO_DEC (decoder);
GST_DEBUG_OBJECT (self, "Stopping");
gst_v4l2_object_unlock (self->v4l2output);
gst_v4l2_object_unlock (self->v4l2capture);
/* Wait for capture thread to stop */
gst_pad_stop_task (decoder->srcpad);
GST_VIDEO_DECODER_STREAM_LOCK (decoder);
self->output_flow = GST_FLOW_OK;
GST_VIDEO_DECODER_STREAM_UNLOCK (decoder);
/* Should have been flushed already */
g_assert (g_atomic_int_get (&self->active) == FALSE);
g_assert (g_atomic_int_get (&self->processing) == FALSE);
gst_v4l2_object_stop (self->v4l2output);
gst_v4l2_object_stop (self->v4l2capture);
if (self->input_state) {
gst_video_codec_state_unref (self->input_state);
self->input_state = NULL;
}
GST_DEBUG_OBJECT (self, "Stopped");
return TRUE;
}
static gboolean
gst_v4l2_transform_stop (GstBaseTransform * trans)
{
GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans);
GST_DEBUG_OBJECT (self, "Stop");
gst_v4l2_object_stop (self->v4l2output);
gst_v4l2_object_stop (self->v4l2capture);
gst_caps_replace (&self->incaps, NULL);
gst_caps_replace (&self->outcaps, NULL);
return TRUE;
}
static gboolean
gst_v4l2src_set_caps (GstBaseSrc * src, GstCaps * caps)
{
GstV4l2Src *v4l2src;
GstV4l2Object *obj;
v4l2src = GST_V4L2SRC (src);
obj = v4l2src->v4l2object;
/* make sure the caps changed before doing anything */
if (gst_v4l2_object_caps_equal (obj, caps))
return TRUE;
/* make sure we stop capturing and dealloc buffers */
if (!gst_v4l2_object_stop (obj))
return FALSE;
g_signal_emit (v4l2src, gst_v4l2_signals[SIGNAL_PRE_SET_FORMAT], 0,
v4l2src->v4l2object->video_fd, caps);
if (!gst_v4l2_object_set_format (obj, caps))
/* error already posted */
return FALSE;
return TRUE;
}
static gboolean
gst_v4l2src_set_caps (GstBaseSrc * src, GstCaps * caps)
{
GstV4l2Src *v4l2src;
GstV4l2Object *obj;
v4l2src = GST_V4L2SRC (src);
obj = v4l2src->v4l2object;
/* make sure the caps changed before doing anything */
if (gst_v4l2_object_caps_equal (obj, caps))
return TRUE;
if (GST_V4L2_IS_ACTIVE (obj)) {
/* Just check if the format is acceptable, once we know
* no buffers should be outstanding we try S_FMT.
*
* Basesrc will do an allocation query that
* should indirectly reclaim buffers, after that we can
* set the format and then configure our pool */
if (gst_v4l2_object_try_format (obj, caps)) {
v4l2src->renegotiation_adjust = v4l2src->offset + 1;
v4l2src->pending_set_fmt = TRUE;
} else
return FALSE;
} else {
/* make sure we stop capturing and dealloc buffers */
if (!gst_v4l2_object_stop (obj))
return FALSE;
return gst_v4l2src_set_format (v4l2src, caps);
}
return TRUE;
}
static gboolean
gst_v4l2sink_set_caps (GstBaseSink * bsink, GstCaps * caps)
{
GstV4l2Sink *v4l2sink = GST_V4L2SINK (bsink);
GstV4l2Object *obj = v4l2sink->v4l2object;
LOG_CAPS (v4l2sink, caps);
if (!GST_V4L2_IS_OPEN (v4l2sink->v4l2object)) {
GST_DEBUG_OBJECT (v4l2sink, "device is not open");
return FALSE;
}
/* make sure the caps changed before doing anything */
if (gst_v4l2_object_caps_equal (obj, caps))
return TRUE;
if (!gst_v4l2_object_stop (obj))
goto stop_failed;
if (!gst_v4l2_object_set_format (v4l2sink->v4l2object, caps))
goto invalid_format;
gst_v4l2sink_sync_overlay_fields (v4l2sink);
gst_v4l2sink_sync_crop_fields (v4l2sink);
#ifdef HAVE_XVIDEO
gst_v4l2_video_overlay_prepare_window_handle (v4l2sink->v4l2object, TRUE);
#endif
GST_INFO_OBJECT (v4l2sink, "outputting buffers via mmap()");
v4l2sink->video_width = GST_V4L2_WIDTH (v4l2sink->v4l2object);
v4l2sink->video_height = GST_V4L2_HEIGHT (v4l2sink->v4l2object);
/* TODO: videosink width/height should be scaled according to
* pixel-aspect-ratio
*/
GST_VIDEO_SINK_WIDTH (v4l2sink) = v4l2sink->video_width;
GST_VIDEO_SINK_HEIGHT (v4l2sink) = v4l2sink->video_height;
return TRUE;
/* ERRORS */
stop_failed:
{
GST_DEBUG_OBJECT (v4l2sink, "failed to stop streaming");
return FALSE;
}
invalid_format:
{
/* error already posted */
GST_DEBUG_OBJECT (v4l2sink, "can't set format");
return FALSE;
}
}
static GstStateChangeReturn
gst_v4l2sink_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstV4l2Sink *v4l2sink = GST_V4L2SINK (element);
GST_DEBUG_OBJECT (v4l2sink, "%d -> %d",
GST_STATE_TRANSITION_CURRENT (transition),
GST_STATE_TRANSITION_NEXT (transition));
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
/* open the device */
if (!gst_v4l2_object_open (v4l2sink->v4l2object))
return GST_STATE_CHANGE_FAILURE;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (!gst_v4l2_object_stop (v4l2sink->v4l2object))
return GST_STATE_CHANGE_FAILURE;
break;
case GST_STATE_CHANGE_READY_TO_NULL:
/* we need to call stop here too */
if (!gst_v4l2_object_stop (v4l2sink->v4l2object))
return GST_STATE_CHANGE_FAILURE;
/* close the device */
if (!gst_v4l2_object_close (v4l2sink->v4l2object))
return GST_STATE_CHANGE_FAILURE;
break;
default:
break;
}
return ret;
}
static gboolean
gst_v4l2src_stop (GstBaseSrc * src)
{
GstV4l2Src *v4l2src = GST_V4L2SRC (src);
GstV4l2Object *obj = v4l2src->v4l2object;
if (GST_V4L2_IS_ACTIVE (obj)) {
if (!gst_v4l2_object_stop (obj))
return FALSE;
}
return TRUE;
}
static gboolean
gst_v4l2_transform_set_caps (GstBaseTransform * trans, GstCaps * incaps,
GstCaps * outcaps)
{
GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans);
if (self->incaps && self->outcaps) {
if (gst_caps_is_equal (incaps, self->incaps) &&
gst_caps_is_equal (outcaps, self->outcaps)) {
GST_DEBUG_OBJECT (trans, "Caps did not changed");
return TRUE;
}
}
/* TODO Add renegotiation support */
g_return_val_if_fail (!GST_V4L2_IS_ACTIVE (self->v4l2output), FALSE);
g_return_val_if_fail (!GST_V4L2_IS_ACTIVE (self->v4l2capture), FALSE);
gst_caps_replace (&self->incaps, incaps);
gst_caps_replace (&self->outcaps, outcaps);
if (!gst_v4l2_object_set_format (self->v4l2output, incaps))
goto incaps_failed;
if (!gst_v4l2_object_set_format (self->v4l2capture, outcaps))
goto outcaps_failed;
/* FIXME implement fallback if crop not supported */
if (!gst_v4l2_object_set_crop (self->v4l2output))
goto failed;
if (!gst_v4l2_object_set_crop (self->v4l2capture))
goto failed;
return TRUE;
incaps_failed:
{
GST_ERROR_OBJECT (self, "failed to set input caps: %" GST_PTR_FORMAT,
incaps);
goto failed;
}
outcaps_failed:
{
gst_v4l2_object_stop (self->v4l2output);
GST_ERROR_OBJECT (self, "failed to set output caps: %" GST_PTR_FORMAT,
outcaps);
goto failed;
}
failed:
return FALSE;
}
static GstStateChangeReturn
gst_v4l2sink_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstV4l2Sink *v4l2sink = GST_V4L2SINK (element);
GST_DEBUG_OBJECT (v4l2sink, "%d -> %d",
GST_STATE_TRANSITION_CURRENT (transition),
GST_STATE_TRANSITION_NEXT (transition));
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
/* open the device */
if (!gst_v4l2_object_start (v4l2sink->v4l2object))
return GST_STATE_CHANGE_FAILURE;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (v4l2sink->state == STATE_STREAMING) {
if (!gst_v4l2_object_stop_streaming (v4l2sink->v4l2object)) {
return GST_STATE_CHANGE_FAILURE;
}
v4l2sink->state = STATE_PENDING_STREAMON;
}
break;
case GST_STATE_CHANGE_READY_TO_NULL:
if (NULL != v4l2sink->pool)
gst_v4l2_buffer_pool_destroy (v4l2sink->pool);
v4l2sink->pool = NULL;
/* close the device */
if (!gst_v4l2_object_stop (v4l2sink->v4l2object))
return GST_STATE_CHANGE_FAILURE;
v4l2sink->state = STATE_OFF;
break;
default:
break;
}
return ret;
}
static gboolean
gst_v4l2src_decide_allocation (GstBaseSrc * bsrc, GstQuery * query)
{
GstV4l2Src *src = GST_V4L2SRC (bsrc);
gboolean ret = TRUE;
if (src->pending_set_fmt) {
GstCaps *caps = gst_pad_get_current_caps (GST_BASE_SRC_PAD (bsrc));
if (!gst_v4l2_object_stop (src->v4l2object))
return FALSE;
ret = gst_v4l2src_set_format (src, caps);
gst_caps_unref (caps);
src->pending_set_fmt = FALSE;
}
if (ret) {
ret = gst_v4l2_object_decide_allocation (src->v4l2object, query);
if (ret)
ret = GST_BASE_SRC_CLASS (parent_class)->decide_allocation (bsrc, query);
}
if (ret) {
if (!gst_buffer_pool_set_active (src->v4l2object->pool, TRUE))
goto activate_failed;
}
return ret;
activate_failed:
{
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS,
(_("Failed to allocate required memory.")),
("Buffer pool activation failed"));
return FALSE;
}
}