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omx: Don't hold any locks while calling OMX_SendCommand()

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It might call into one of the callbacks and lead to deadlocks, e.g.
with the Qualcomm OMX implementation.
This commit is contained in:
Sebastian Dröge 2011-08-10 09:49:57 +02:00
parent 0bb345a16d
commit 9dcaf5c2bb
1 changed files with 43 additions and 6 deletions
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49
omx/gstomx.c
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@ -503,7 +503,6 @@ gst_omx_component_set_state (GstOMXComponent * comp, OMX_STATETYPE state)
}
comp->pending_state = state;
err = OMX_SendCommand (comp->handle, OMX_CommandStateSet, state, NULL);
/* Reset some things */
if (old_state == OMX_StateExecuting && state < old_state) {
@ -514,6 +513,13 @@ gst_omx_component_set_state (GstOMXComponent * comp, OMX_STATETYPE state)
g_cond_broadcast (comp->state_cond);
}
/* Release lock because the command could call into the callbacks,
* which take the lock again */
g_mutex_unlock (comp->state_lock);
err = OMX_SendCommand (comp->handle, OMX_CommandStateSet, state, NULL);
g_mutex_lock (comp->state_lock);
/* No need to check if anything has changed here */
done:
g_mutex_unlock (comp->state_lock);
@ -1106,8 +1112,14 @@ gst_omx_port_set_flushing (GstOMXPort * port, gboolean flush)
g_cond_broadcast (comp->state_cond);
g_mutex_unlock (comp->state_lock);
/* Now flush the port */
port->flushed = FALSE;
/* Unlock because this could call one of the callbacks which
* also take the lock */
g_mutex_unlock (port->port_lock);
err = OMX_SendCommand (comp->handle, OMX_CommandFlush, port->index, NULL);
g_mutex_lock (port->port_lock);
if (err != OMX_ErrorNone) {
GST_ERROR_OBJECT (comp->parent,
"Error sending flush command to port %u: %s (0x%08x)", port->index,
@ -1115,6 +1127,18 @@ gst_omx_port_set_flushing (GstOMXPort * port, gboolean flush)
goto done;
}
if ((err = gst_omx_component_get_last_error (comp)) != OMX_ErrorNone) {
GST_ERROR_OBJECT (comp->parent,
"Component is in error state: %s (0x%08x)",
gst_omx_error_to_string (err), err);
goto done;
}
if (! !port->flushing != ! !flush) {
GST_ERROR_OBJECT (comp->parent, "Another flush happened in the meantime");
goto done;
}
g_get_current_time (&abstimeout);
g_time_val_add (&abstimeout, 5 * G_USEC_PER_SEC);
timeval = &abstimeout;
@ -1123,12 +1147,14 @@ gst_omx_port_set_flushing (GstOMXPort * port, gboolean flush)
/* Retry until timeout or until an error happend or
* until all buffers were released by the component and
* the flush command completed */
do {
signalled = TRUE;
last_error = OMX_ErrorNone;
while (signalled && last_error == OMX_ErrorNone && !port->flushed
&& port->buffers->len != g_queue_get_length (port->pending_buffers)) {
signalled = g_cond_timed_wait (port->port_cond, port->port_lock, timeval);
last_error = gst_omx_component_get_last_error (comp);
} while (signalled && last_error == OMX_ErrorNone && !port->flushed
&& port->buffers->len != g_queue_get_length (port->pending_buffers));
}
port->flushed = FALSE;
GST_DEBUG_OBJECT (comp->parent, "Port %d flushed", port->index);
@ -1433,6 +1459,7 @@ gst_omx_port_set_enabled_unlocked (GstOMXPort * port, gboolean enabled)
port->enabled_changed = FALSE;
g_mutex_unlock (port->port_lock);
if (enabled)
err =
OMX_SendCommand (comp->handle, OMX_CommandPortEnable, port->index,
@ -1441,6 +1468,7 @@ gst_omx_port_set_enabled_unlocked (GstOMXPort * port, gboolean enabled)
err =
OMX_SendCommand (comp->handle, OMX_CommandPortDisable,
port->index, NULL);
g_mutex_lock (port->port_lock);
if (err != OMX_ErrorNone) {
GST_ERROR_OBJECT (comp->parent,
@ -1449,6 +1477,17 @@ gst_omx_port_set_enabled_unlocked (GstOMXPort * port, gboolean enabled)
goto error;
}
if ((err = gst_omx_component_get_last_error (comp)) != OMX_ErrorNone) {
GST_ERROR_OBJECT (comp->parent, "Component in error state: %s (0x%08x)",
gst_omx_error_to_string (err), err);
goto done;
}
if (port->enabled_changed) {
GST_ERROR_OBJECT (comp->parent, "Port enabled/disabled in the meantime");
goto done;
}
g_get_current_time (&abstimeout);
g_time_val_add (&abstimeout, 5 * G_USEC_PER_SEC);
timeval = &abstimeout;
@ -1505,8 +1544,6 @@ gst_omx_port_set_enabled_unlocked (GstOMXPort * port, gboolean enabled)
&port->port_def);
}
port->enabled_changed = FALSE;
if (!signalled) {
GST_ERROR_OBJECT (comp->parent,
"Timeout waiting for port %u to be %s", port->index,