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glmixer: lock the size of mix->frames to the number of pads

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Fixes a segfault with decodebin ! glmixer where the request pads on
both sides were being requested after the state change to PAUSED.

Also fixes dynamically adding and removing pads while glmixer is
in a state >= PAUSED.
This commit is contained in:
Matthew Waters 2014-06-12 12:14:35 +10:00 committed by Tim-Philipp Müller
parent 31ee764a8a
commit 6a7ccd6f3e
1 changed files with 58 additions and 59 deletions
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55
gst-libs/gst/gl/gstglmixer.c
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@ -715,6 +715,12 @@ gst_gl_mixer_reset (GstGLMixer * mix)
priv->negotiated = FALSE;
}
static void
_free_pad_frame_data (gpointer data)
{
g_slice_free1 (sizeof (GstGLMixerFrameData), data);
}
static void
gst_gl_mixer_init (GstGLMixer * mix)
{
@ -751,6 +757,9 @@ gst_gl_mixer_init (GstGLMixer * mix)
mix->fbo = 0;
mix->depthbuffer = 0;
mix->frames = g_ptr_array_new_full (4, _free_pad_frame_data);
mix->array_buffers = g_ptr_array_new_full (4, NULL);
/* initialize variables */
gst_gl_mixer_reset (mix);
}
@ -763,6 +772,9 @@ gst_gl_mixer_finalize (GObject * object)
gst_object_unref (mix->collect);
g_mutex_clear (&mix->lock);
g_ptr_array_free (mix->frames, TRUE);
g_ptr_array_free (mix->array_buffers, TRUE);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
@ -1354,14 +1366,15 @@ gst_gl_mixer_request_new_pad (GstElement * element,
GstGLMixer *mix;
GstGLMixerPad *mixpad;
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
mix = GST_GL_MIXER (element);
if (templ == gst_element_class_get_pad_template (klass, "sink_%d")) {
gint serial = 0;
gchar *name = NULL;
GstGLMixerCollect *mixcol = NULL;
mix = GST_GL_MIXER (element);
if (templ != gst_element_class_get_pad_template (klass, "sink_%d"))
return NULL;
GST_GL_MIXER_LOCK (mix);
if (req_name == NULL || strlen (req_name) < 6
|| !g_str_has_prefix (req_name, "sink_")) {
@ -1394,10 +1407,6 @@ gst_gl_mixer_request_new_pad (GstElement * element,
/* Keep an internal list of mixpads for zordering */
mix->sinkpads = g_slist_append (mix->sinkpads, mixpad);
mix->numpads++;
GST_GL_MIXER_UNLOCK (mix);
} else {
return NULL;
}
GST_DEBUG_OBJECT (element, "Adding pad %s", GST_PAD_NAME (mixpad));
@ -1406,6 +1415,13 @@ gst_gl_mixer_request_new_pad (GstElement * element,
gst_child_proxy_child_added (GST_CHILD_PROXY (mix), G_OBJECT (mixpad),
GST_OBJECT_NAME (mixpad));
g_ptr_array_set_size (mix->array_buffers, mix->numpads);
g_ptr_array_set_size (mix->frames, mix->numpads);
mix->frames->pdata[mix->numpads - 1] = g_slice_new0 (GstGLMixerFrameData);
GST_GL_MIXER_UNLOCK (mix);
return GST_PAD (mixpad);
}
@ -1431,6 +1447,9 @@ gst_gl_mixer_release_pad (GstElement * element, GstPad * pad)
GST_OBJECT_NAME (mixpad));
mix->numpads--;
g_ptr_array_set_size (mix->array_buffers, mix->numpads);
g_ptr_array_set_size (mix->frames, mix->numpads);
update_caps =
GST_VIDEO_INFO_FORMAT (&mix->out_info) != GST_VIDEO_FORMAT_UNKNOWN;
GST_GL_MIXER_UNLOCK (mix);
@ -2273,37 +2292,17 @@ gst_gl_mixer_change_state (GstElement * element, GstStateChange transition)
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
{
guint i;
mix->array_buffers = g_ptr_array_new_full (mix->numpads, NULL);
mix->frames = g_ptr_array_new_full (mix->numpads, NULL);
g_ptr_array_set_size (mix->array_buffers, mix->numpads);
g_ptr_array_set_size (mix->frames, mix->numpads);
for (i = 0; i < mix->numpads; i++) {
mix->frames->pdata[i] = g_slice_new0 (GstGLMixerFrameData);
}
GST_LOG_OBJECT (mix, "starting collectpads");
gst_collect_pads_start (mix->collect);
break;
}
case GST_STATE_CHANGE_PAUSED_TO_READY:
{
guint i;
GSList *walk = mix->sinkpads;
GST_LOG_OBJECT (mix, "stopping collectpads");
gst_collect_pads_stop (mix->collect);
for (i = 0; i < mix->numpads; i++) {
g_slice_free1 (sizeof (GstGLMixerFrameData), mix->frames->pdata[i]);
}
g_ptr_array_free (mix->array_buffers, TRUE);
g_ptr_array_free (mix->frames, TRUE);
if (mixer_class->reset)
mixer_class->reset (mix);
if (mix->fbo) {