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gstv4l2bufferpool: handle -EPIPE from DQBUF to signal EOS

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The V4L2 decoder signals EOS by returning -EPIPE from DQBUF after the
last buffer.

https://bugzilla.gnome.org/show_bug.cgi?id=743338
This commit is contained in:
Philipp Zabel 2015-01-21 18:09:03 +01:00 committed by Nicolas Dufresne
parent b0b3e8e2cc
commit 95bab88225
3 changed files with 23 additions and 9 deletions
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19
sys/v4l2/gstv4l2allocator.c
View file

@ -1269,8 +1269,9 @@ done:
return ret;
}
GstV4l2MemoryGroup *
gst_v4l2_allocator_dqbuf (GstV4l2Allocator * allocator)
GstFlowReturn
gst_v4l2_allocator_dqbuf (GstV4l2Allocator * allocator,
GstV4l2MemoryGroup ** group_out)
{
struct v4l2_buffer buffer = { 0 };
struct v4l2_plane planes[VIDEO_MAX_PLANES] = { {0} };
@ -1278,7 +1279,7 @@ gst_v4l2_allocator_dqbuf (GstV4l2Allocator * allocator)
GstV4l2MemoryGroup *group = NULL;
g_return_val_if_fail (g_atomic_int_get (&allocator->active), FALSE);
g_return_val_if_fail (g_atomic_int_get (&allocator->active), GST_FLOW_ERROR);
buffer.type = allocator->type;
buffer.memory = allocator->memory;
@ -1296,7 +1297,7 @@ gst_v4l2_allocator_dqbuf (GstV4l2Allocator * allocator)
if (!IS_QUEUED (group->buffer)) {
GST_ERROR_OBJECT (allocator,
"buffer %i was not queued, this indicate a driver bug.", buffer.index);
return NULL;
return GST_FLOW_ERROR;
}
group->buffer = buffer;
@ -1334,9 +1335,15 @@ gst_v4l2_allocator_dqbuf (GstV4l2Allocator * allocator)
for (i = 0; i < group->n_mem; i++)
gst_memory_unref (group->mem[i]);
return group;
*group_out = group;
return GST_FLOW_OK;
error:
if (errno == EPIPE) {
GST_DEBUG_OBJECT (allocator, "broken pipe signals last buffer");
return GST_FLOW_EOS;
}
GST_ERROR_OBJECT (allocator, "failed dequeuing a %s buffer: %s",
memory_type_to_str (allocator->memory), g_strerror (errno));
@ -1378,7 +1385,7 @@ error:
break;
}
return NULL;
return GST_FLOW_ERROR;
}
void

3
sys/v4l2/gstv4l2allocator.h
View file

@ -148,7 +148,8 @@ void gst_v4l2_allocator_flush (GstV4l2Allocator * alloc
gboolean gst_v4l2_allocator_qbuf (GstV4l2Allocator * allocator,
GstV4l2MemoryGroup * group);
GstV4l2MemoryGroup* gst_v4l2_allocator_dqbuf (GstV4l2Allocator * allocator);
GstFlowReturn gst_v4l2_allocator_dqbuf (GstV4l2Allocator * allocator,
GstV4l2MemoryGroup ** group);
void gst_v4l2_allocator_reset_group (GstV4l2Allocator * allocator,
GstV4l2MemoryGroup * group);

10
sys/v4l2/gstv4l2bufferpool.c
View file

@ -1139,8 +1139,10 @@ gst_v4l2_buffer_pool_dqbuf (GstV4l2BufferPool * pool, GstBuffer ** buffer)
GST_LOG_OBJECT (pool, "dequeueing a buffer");
group = gst_v4l2_allocator_dqbuf (pool->vallocator);
if (group == NULL)
res = gst_v4l2_allocator_dqbuf (pool->vallocator, &group);
if (res == GST_FLOW_EOS)
goto eos;
if (res != GST_FLOW_OK)
goto dqbuf_failed;
/* get our GstBuffer with that index from the pool, if the buffer was
@ -1261,6 +1263,10 @@ poll_failed:
GST_DEBUG_OBJECT (pool, "poll error %s", gst_flow_get_name (res));
return res;
}
eos:
{
return GST_FLOW_EOS;
}
dqbuf_failed:
{
return GST_FLOW_ERROR;