本文整理汇总了C++中GstBufferPoolClass::alloc_buffer方法的典型用法代码示例。如果您正苦于以下问题：C++ GstBufferPoolClass::alloc_buffer方法的具体用法？C++ GstBufferPoolClass::alloc_buffer怎么用？C++ GstBufferPoolClass::alloc_buffer使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类GstBufferPoolClass的用法示例。
在下文中一共展示了GstBufferPoolClass::alloc_buffer方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1:
static GstFlowReturn
do_alloc_buffer (GstBufferPool * pool, GstBuffer ** buffer,
GstBufferPoolAcquireParams * params)
{
GstBufferPoolPrivate *priv = pool->priv;
GstFlowReturn result;
gint cur_buffers, max_buffers;
GstBufferPoolClass *pclass;
pclass = GST_BUFFER_POOL_GET_CLASS (pool);
if (G_UNLIKELY (!pclass->alloc_buffer))
goto no_function;
max_buffers = priv->max_buffers;
/* increment the allocation counter */
cur_buffers = g_atomic_int_add (&priv->cur_buffers, 1);
if (max_buffers && cur_buffers >= max_buffers)
goto max_reached;
result = pclass->alloc_buffer (pool, buffer, params);
if (G_UNLIKELY (result != GST_FLOW_OK))
goto alloc_failed;
/* lock all metadata and mark as pooled, we want this to remain on
* the buffer and we want to remove any other metadata that gets added
* later */
gst_buffer_foreach_meta (*buffer, mark_meta_pooled, pool);
/* un-tag memory, this is how we expect the buffer when it is
* released again */
GST_BUFFER_FLAG_UNSET (*buffer, GST_BUFFER_FLAG_TAG_MEMORY);
GST_LOG_OBJECT (pool, "allocated buffer %d/%d, %p", cur_buffers,
max_buffers, *buffer);
return result;
/* ERRORS */
no_function:
{
GST_ERROR_OBJECT (pool, "no alloc function");
return GST_FLOW_NOT_SUPPORTED;
}
max_reached:
{
GST_DEBUG_OBJECT (pool, "max buffers reached");
g_atomic_int_add (&priv->cur_buffers, -1);
return GST_FLOW_EOS;
}
alloc_failed:
{
GST_WARNING_OBJECT (pool, "alloc function failed");
g_atomic_int_add (&priv->cur_buffers, -1);
return result;
}
}示例2:
static GstFlowReturn
do_alloc_buffer (GstBufferPool * pool, GstBuffer ** buffer,
GstBufferPoolAcquireParams * params)
{
GstBufferPoolPrivate *priv = pool->priv;
GstFlowReturn result;
gint cur_buffers, max_buffers;
GstBufferPoolClass *pclass;
pclass = GST_BUFFER_POOL_GET_CLASS (pool);
if (G_UNLIKELY (!pclass->alloc_buffer))
goto no_function;
max_buffers = priv->max_buffers;
/* increment the allocation counter */
cur_buffers = g_atomic_int_add (&priv->cur_buffers, 1);
if (max_buffers && cur_buffers >= max_buffers)
goto max_reached;
result = pclass->alloc_buffer (pool, buffer, params);
if (G_UNLIKELY (result != GST_FLOW_OK))
goto alloc_failed;
gst_buffer_foreach_meta (*buffer, mark_meta_pooled, pool);
GST_LOG_OBJECT (pool, "allocated buffer %d/%d, %p", cur_buffers,
max_buffers, buffer);
return result;
/* ERRORS */
no_function:
{
GST_ERROR_OBJECT (pool, "no alloc function");
return GST_FLOW_NOT_SUPPORTED;
}
max_reached:
{
GST_DEBUG_OBJECT (pool, "max buffers reached");
g_atomic_int_add (&priv->cur_buffers, -1);
return GST_FLOW_EOS;
}
alloc_failed:
{
GST_WARNING_OBJECT (pool, "alloc function failed");
g_atomic_int_add (&priv->cur_buffers, -1);
return result;
}
}