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playbin: Add simple 'raw decoding mode'.

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Raw decoding mode removes almost all buffering in video and audio queues
when a source providing already decoded video/audio is detected, on the
possibly bogus assumption that such a source should provide sufficient
internal queueing. Fixes playback on some DVDs, and improves it
on all.
This commit is contained in:
Jan Schmidt 2009-02-04 17:03:07 +00:00
parent df660e91c2
commit c2a56e3115
2 changed files with 19 additions and 4 deletions
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22
gst/playback/gstplaybasebin.c
View file

@ -826,10 +826,22 @@ gen_preroll_element (GstPlayBaseBin * play_base_bin,
* after the source that measures the datarate and scales this
* queue of encoded data instead.
*/
g_object_set (G_OBJECT (preroll),
"max-size-buffers", 0, "max-size-bytes",
((type == GST_STREAM_TYPE_VIDEO) ? 25 : 2) * 1024 * 1024,
"max-size-time", play_base_bin->queue_size, NULL);
if (play_base_bin->raw_decoding_mode) {
if (type == GST_STREAM_TYPE_VIDEO) {
g_object_set (G_OBJECT (preroll),
"max-size-buffers", 2, "max-size-bytes", 0,
"max-size-time", (guint64) 0, NULL);
} else {
g_object_set (G_OBJECT (preroll),
"max-size-buffers", 0, "max-size-bytes",
2 * 1024 * 1024, "max-size-time", play_base_bin->queue_size, NULL);
}
} else {
g_object_set (G_OBJECT (preroll),
"max-size-buffers", 0, "max-size-bytes",
((type == GST_STREAM_TYPE_VIDEO) ? 25 : 2) * 1024 * 1024,
"max-size-time", play_base_bin->queue_size, NULL);
}
/* the overrun signal is always attached and serves two purposes:
*
@ -1697,6 +1709,7 @@ source_new_pad (GstElement * element, GstPad * pad, GstPlayBaseBin * bin)
GST_DEBUG_PAD_NAME (pad), GST_ELEMENT_NAME (element));
/* if this is a pad with all raw caps, we can expose it */
bin->raw_decoding_mode = TRUE;
if (has_all_raw_caps (pad, &is_raw) && is_raw) {
/* it's all raw, create output pads. */
new_decoded_pad_full (element, pad, FALSE, bin, FALSE);
@ -2066,6 +2079,7 @@ setup_source (GstPlayBaseBin * play_base_bin)
if (!play_base_bin->need_rebuild)
return TRUE;
play_base_bin->raw_decoding_mode = FALSE;
GST_DEBUG_OBJECT (play_base_bin, "setup source");

1
gst/playback/gstplaybasebin.h
View file

@ -87,6 +87,7 @@ struct _GstPlayBaseBin {
GstElement *subtitle; /* additional filesrc ! subparse bin */
gboolean subtitle_done;
gboolean need_rebuild;
gboolean raw_decoding_mode; /* Use smaller queues when source outputs raw data */
GSList *subtitle_elements; /* subtitle elements that have 'subtitle-encoding' property */
gchar *subencoding; /* encoding to propagate to the above subtitle elements */