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adaptivedemux: restore bitrate averaging support

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This was accidentally removed in commit ccff3be3.
https://bugzilla.gnome.org/show_bug.cgi?id=733959
This commit is contained in:
Philippe Normand 2016-01-21 11:53:33 +01:00 committed by Sebastian Dröge
parent 4d1489b3de
commit 0b7276d01a
2 changed files with 49 additions and 6 deletions
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50
gst-libs/gst/adaptivedemux/gstadaptivedemux.c
View file

@ -135,6 +135,7 @@ GST_DEBUG_CATEGORY (adaptivedemux_debug);
#define DEFAULT_CONNECTION_SPEED 0
#define DEFAULT_BITRATE_LIMIT 0.8
#define SRC_QUEUE_MAX_BYTES 20 * 1024 * 1024 /* For safety. Large enough to hold a segment. */
#define NUM_LOOKBACK_FRAGMENTS 3
#define GST_MANIFEST_GET_LOCK(d) (&(GST_ADAPTIVE_DEMUX_CAST(d)->priv->manifest_lock))
#define GST_MANIFEST_LOCK(d) g_rec_mutex_lock (GST_MANIFEST_GET_LOCK (d));
@ -1061,6 +1062,8 @@ gst_adaptive_demux_stream_new (GstAdaptiveDemux * demux, GstPad * pad)
stream->pad = pad;
stream->demux = demux;
stream->fragment_bitrates =
g_malloc0 (sizeof (guint64) * NUM_LOOKBACK_FRAGMENTS);
gst_pad_set_element_private (pad, stream);
gst_pad_set_query_function (pad,
@ -1165,6 +1168,7 @@ gst_adaptive_demux_stream_free (GstAdaptiveDemuxStream * stream)
g_cond_clear (&stream->fragment_download_cond);
g_mutex_clear (&stream->fragment_download_lock);
g_free (stream->fragment_bitrates);
if (stream->pad) {
gst_object_unref (stream->pad);
@ -1710,12 +1714,31 @@ gst_adaptive_demux_stream_queue_event (GstAdaptiveDemuxStream * stream,
stream->pending_events = g_list_append (stream->pending_events, event);
}
/* must be called with manifest_lock taken */
static guint64
_update_average_bitrate (GstAdaptiveDemux * demux,
GstAdaptiveDemuxStream * stream, guint64 new_bitrate)
{
gint index = stream->moving_index % NUM_LOOKBACK_FRAGMENTS;
stream->moving_bitrate -= stream->fragment_bitrates[index];
stream->fragment_bitrates[index] = new_bitrate;
stream->moving_bitrate += new_bitrate;
stream->moving_index += 1;
if (stream->moving_index > NUM_LOOKBACK_FRAGMENTS)
return stream->moving_bitrate / NUM_LOOKBACK_FRAGMENTS;
return stream->moving_bitrate / stream->moving_index;
}
/* must be called with manifest_lock taken */
static guint64
gst_adaptive_demux_stream_update_current_bitrate (GstAdaptiveDemux * demux,
GstAdaptiveDemuxStream * stream)
{
guint64 bitrate;
guint64 average_bitrate;
guint64 fragment_bitrate;
if (demux->connection_speed) {
GST_LOG_OBJECT (demux, "Connection-speed is set to %u kbps, using it",
@ -1723,12 +1746,27 @@ gst_adaptive_demux_stream_update_current_bitrate (GstAdaptiveDemux * demux,
return demux->connection_speed;
}
g_object_get (stream->queue, "avg-in-rate", &bitrate, NULL);
bitrate *= 8;
g_object_get (stream->queue, "avg-in-rate", &fragment_bitrate, NULL);
fragment_bitrate *= 8;
GST_DEBUG_OBJECT (demux, "Download bitrate is : %" G_GUINT64_FORMAT " bps",
bitrate);
stream->current_download_rate = bitrate;
return bitrate;
fragment_bitrate);
average_bitrate = _update_average_bitrate (demux, stream, fragment_bitrate);
GST_INFO_OBJECT (stream, "last fragment bitrate was %" G_GUINT64_FORMAT,
fragment_bitrate);
GST_INFO_OBJECT (stream,
"Last %u fragments average bitrate is %" G_GUINT64_FORMAT,
NUM_LOOKBACK_FRAGMENTS, average_bitrate);
/* Conservative approach, make sure we don't upgrade too fast */
stream->current_download_rate = MIN (average_bitrate, fragment_bitrate);
stream->current_download_rate *= demux->bitrate_limit;
GST_DEBUG_OBJECT (demux, "Bitrate after bitrate limit (%0.2f): %"
G_GUINT64_FORMAT, demux->bitrate_limit,
stream->current_download_rate * 8);
return stream->current_download_rate;
}
/* must be called with manifest_lock taken */

5
gst-libs/gst/adaptivedemux/gstadaptivedemux.h
View file

@ -160,6 +160,11 @@ struct _GstAdaptiveDemuxStream
gint64 download_total_bytes;
guint64 current_download_rate;
/* Average for the last fragments */
guint64 moving_bitrate;
guint moving_index;
guint64 *fragment_bitrates;
GstAdaptiveDemuxStreamFragment fragment;
guint download_error_count;