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videometa: use new buffer methods when mapping memory

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Use _find_memory and _map_range to simplify, improve and optimize the
memory mapping of video frames.
This commit is contained in:
Wim Taymans 2012-04-01 18:04:10 +02:00
parent 6f8347de9f
commit 1d60bd12e5
1 changed files with 15 additions and 35 deletions
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50
gst-libs/gst/video/gstvideometa.c
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@ -119,45 +119,24 @@ static gboolean
default_map (GstVideoMeta * meta, guint plane, GstMapInfo * info,
gpointer * data, gint * stride, GstMapFlags flags)
{
guint n, i;
guint offset;
guint offset, idx, length;
gsize skip;
GstBuffer *buffer = meta->buffer;
if ((n = gst_buffer_n_memory (buffer)) == 0)
offset = meta->offset[plane];
/* find the memory block for this plane, this is the memory block containing
* the plane offset. FIXME use plane size */
if (!gst_buffer_find_memory (buffer, offset, 1, &idx, &length, &skip))
goto no_memory;
offset = meta->offset[plane];
if (!gst_buffer_map_range (buffer, idx, length, info, flags))
goto cannot_map;
*stride = meta->stride[plane];
/* find the memory block for this plane, this is the memory block containing
* the plane offset. @offset will be updated with the offset inside the memory
* block where the plane starts. */
for (i = 0; i < n; i++) {
GstMemory *mem = NULL;
gsize size;
*data = (guint8 *) info->data + skip;
mem = gst_buffer_get_memory (buffer, i);
size = gst_memory_get_sizes (mem, NULL, NULL);
if (offset < size) {
GstMemory *mapped;
if (!(mapped = gst_memory_make_mapped (mem, info, flags)))
goto cannot_map;
/* buffer is writable when WRITE map is requested, we checked this in
* _map * */
if (mapped != mem && (flags & GST_MAP_WRITE))
gst_buffer_replace_memory (buffer, i, gst_memory_ref (mapped));
*data = (guint8 *) info->data + offset;
return TRUE;
}
offset -= size;
gst_memory_unref (mem);
}
GST_DEBUG ("no memory found for offset %" G_GSIZE_FORMAT,
meta->offset[plane]);
return FALSE;
return TRUE;
/* ERRORS */
no_memory:
@ -175,8 +154,9 @@ cannot_map:
static gboolean
default_unmap (GstVideoMeta * meta, guint plane, GstMapInfo * info)
{
gst_memory_unmap (info->memory, info);
gst_memory_unref (info->memory);
GstBuffer *buffer = meta->buffer;
gst_buffer_unmap (buffer, info);
return TRUE;
}