This function fills @info with the #GstMapInfo of all merged memory
blocks in @buffer.
@flags describe the desired access of the memory. When @flags is
#GST_MAP_WRITE, @buffer should be writable (as returned from
gst_buffer_is_writable()).
When @buffer is writable but the memory isn't, a writable copy will
automatically be created and returned. The readonly copy of the
buffer memory will then also be replaced with this writable copy.
The memory in @info should be unmapped with gst_buffer_unmap() after
usage.
This function fills @info with the #GstMapInfo of all merged memory blocks in @buffer.
@flags describe the desired access of the memory. When @flags is #GST_MAP_WRITE, @buffer should be writable (as returned from gst_buffer_is_writable()).
When @buffer is writable but the memory isn't, a writable copy will automatically be created and returned. The readonly copy of the buffer memory will then also be replaced with this writable copy.
The memory in @info should be unmapped with gst_buffer_unmap() after usage.