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dashdemux: measure download rate just like hlsdemux

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new bitrate = (old bitrate + (last fragment bitrate * 3)) / 4
This commit is contained in:
Thiago Santos 2014-05-01 12:04:51 -03:00
parent bed3d66605
commit d6671e73a6
5 changed files with 28 additions and 202 deletions
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4
ext/dash/Makefile.am
View file

@ -4,14 +4,12 @@ plugin_LTLIBRARIES = libgstdashdemux.la
libgstdashdemux_la_SOURCES = \
gstmpdparser.c \
gstdashdemux.c \
gstplugin.c \
gstdownloadrate.c
gstplugin.c
# headers we need but don't want installed
noinst_HEADERS = \
gstmpdparser.h \
gstdashdemux.h \
gstdownloadrate.h \
gstdash_debug.h
# compiler and linker flags used to compile this plugin, set in configure.ac

52
ext/dash/gstdashdemux.c
View file

@ -180,7 +180,6 @@ enum
#define DEFAULT_MAX_BITRATE 24000000 /* in bit/s */
#define DEFAULT_FAILED_COUNT 3
#define DOWNLOAD_RATE_HISTORY_MAX 3
#define GST_DASH_DEMUX_CLIENT_LOCK(d) g_mutex_lock (&d->client_lock)
#define GST_DASH_DEMUX_CLIENT_UNLOCK(d) g_mutex_unlock (&d->client_lock)
@ -656,13 +655,12 @@ gst_dash_demux_setup_all_streams (GstDashDemux * demux)
g_cond_init (&stream->download_cond);
g_mutex_init (&stream->download_mutex);
stream->downloader = gst_uri_downloader_new ();
stream->download_total_time = 0;
stream->download_total_bytes = 0;
stream->index = i;
stream->input_caps = caps;
stream->need_header = TRUE;
gst_download_rate_init (&stream->dnl_rate);
gst_download_rate_set_max_length (&stream->dnl_rate,
DOWNLOAD_RATE_HISTORY_MAX);
GST_LOG_OBJECT (demux, "Creating stream %d %" GST_PTR_FORMAT, i, caps);
streams = g_slist_prepend (streams, stream);
@ -1096,7 +1094,6 @@ gst_dash_demux_advance_period (GstDashDemux * demux)
static void
gst_dash_demux_stream_free (GstDashDemuxStream * stream)
{
gst_download_rate_deinit (&stream->dnl_rate);
if (stream->input_caps) {
gst_caps_unref (stream->input_caps);
stream->input_caps = NULL;
@ -1593,7 +1590,7 @@ gst_dash_demux_stream_select_representation_unlocked (GstDashDemuxStream *
GList *rep_list = NULL;
gint new_index;
GstDashDemux *demux = stream->demux;
guint64 bitrate;
guint64 bitrate = 0;
active_stream = stream->active_stream;
if (active_stream == NULL)
@ -1605,11 +1602,29 @@ gst_dash_demux_stream_select_representation_unlocked (GstDashDemuxStream *
if (!rep_list)
return FALSE;
/* compare the time when the fragment was downloaded with the time when it was
* scheduled */
if (stream->download_total_time)
bitrate =
gst_download_rate_get_current_rate (&stream->dnl_rate) *
demux->bandwidth_usage;
GST_DEBUG_OBJECT (demux, "Trying to change to bitrate: %" G_GUINT64_FORMAT,
bitrate);
(stream->download_total_bytes * 8) /
((double) stream->download_total_time / G_GUINT64_CONSTANT (1000000));
GST_DEBUG_OBJECT (stream->pad,
"Downloaded %u bytes in %" GST_TIME_FORMAT ". Bitrate is : %d",
(guint) stream->download_total_bytes,
GST_TIME_ARGS (stream->download_total_time * GST_USECOND),
(gint) bitrate);
/* Take old rate into account too */
if (stream->current_download_rate != -1)
bitrate = (stream->current_download_rate + bitrate * 3) / 4;
if (bitrate > G_MAXINT)
bitrate = G_MAXINT;
stream->current_download_rate = bitrate;
bitrate *= demux->bandwidth_usage;
GST_DEBUG_OBJECT (stream->pad,
"Trying to change to bitrate: %" G_GUINT64_FORMAT, bitrate);
/* get representation index with current max_bandwidth */
new_index = gst_mpdparser_get_rep_idx_with_max_bandwidth (rep_list, bitrate);
@ -2266,23 +2281,6 @@ gst_dash_demux_stream_get_next_fragment (GstDashDemuxStream * stream,
GST_WARNING_OBJECT (stream->pad, "Failed to download fragment");
return GST_FLOW_ERROR;
}
#if 0
if (buffer_size > 0 && diff > 0) {
#ifndef GST_DISABLE_GST_DEBUG
guint64 brate;
#endif
gst_download_rate_add_rate (&stream->dnl_rate, buffer_size, diff);
#ifndef GST_DISABLE_GST_DEBUG
brate = (buffer_size * 8) / ((double) diff / GST_SECOND);
#endif
GST_INFO_OBJECT (demux,
"Stream: %d Download rate = %" G_GUINT64_FORMAT " Kbits/s (%"
G_GUINT64_FORMAT " Ko in %.2f s)", stream->index, brate / 1000,
buffer_size / 1024, ((double) diff / GST_SECOND));
}
#endif
return ret;
}

4
ext/dash/gstdashdemux.h
View file

@ -34,7 +34,6 @@
#include <gst/base/gstadapter.h>
#include <gst/base/gstdataqueue.h>
#include "gstmpdparser.h"
#include "gstdownloadrate.h"
#include <gst/uridownloader/gsturidownloader.h>
G_BEGIN_DECLS
@ -80,8 +79,6 @@ struct _GstDashDemuxStream
GRecMutex download_task_lock;
GstUriDownloader *downloader;
GstDownloadRate dnl_rate;
/* download tooling */
GstElement *src;
GstPad *src_srcpad;
@ -92,6 +89,7 @@ struct _GstDashDemuxStream
gint64 download_start_time;
gint64 download_total_time;
gint64 download_total_bytes;
gint current_download_rate;
};
/**

113
ext/dash/gstdownloadrate.c
View file

@ -1,113 +0,0 @@
/* GStreamer
* Copyright (C) 2011 Andoni Morales Alastruey <ylatuya@gmail.com>
* Copyright (C) 2012 Smart TV Alliance
* Author: Louis-Francis Ratté-Boulianne <lfrb@collabora.com>, Collabora Ltd.
*
* gstfragment.c:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <glib.h>
#include "gstdownloadrate.h"
static void
_gst_download_rate_check_remove_rates (GstDownloadRate * rate)
{
if (rate->max_length == 0)
return;
while (g_queue_get_length (&rate->queue) > rate->max_length) {
guint bitrate = GPOINTER_TO_UINT (g_queue_pop_head (&rate->queue));
rate->total -= bitrate;
}
}
void
gst_download_rate_init (GstDownloadRate * rate)
{
g_queue_init (&rate->queue);
g_mutex_init (&rate->mutex);
rate->total = 0;
rate->max_length = 0;
}
void
gst_download_rate_deinit (GstDownloadRate * rate)
{
gst_download_rate_clear (rate);
g_mutex_clear (&rate->mutex);
}
void
gst_download_rate_set_max_length (GstDownloadRate * rate, gint max_length)
{
g_mutex_lock (&rate->mutex);
rate->max_length = max_length;
_gst_download_rate_check_remove_rates (rate);
g_mutex_unlock (&rate->mutex);
}
gint
gst_download_rate_get_max_length (GstDownloadRate * rate)
{
guint ret;
g_mutex_lock (&rate->mutex);
ret = rate->max_length;
g_mutex_unlock (&rate->mutex);
return ret;
}
void
gst_download_rate_clear (GstDownloadRate * rate)
{
g_mutex_lock (&rate->mutex);
g_queue_clear (&rate->queue);
rate->total = 0;
g_mutex_unlock (&rate->mutex);
}
void
gst_download_rate_add_rate (GstDownloadRate * rate, guint bytes, guint64 time)
{
guint64 bitrate;
g_mutex_lock (&rate->mutex);
/* convert from bytes / nanoseconds to bits per second */
bitrate = G_GUINT64_CONSTANT (8000000000) * bytes / time;
g_queue_push_tail (&rate->queue, GUINT_TO_POINTER ((guint) bitrate));
rate->total += bitrate;
_gst_download_rate_check_remove_rates (rate);
g_mutex_unlock (&rate->mutex);
}
guint
gst_download_rate_get_current_rate (GstDownloadRate * rate)
{
guint ret;
g_mutex_lock (&rate->mutex);
if (g_queue_get_length (&rate->queue))
ret = rate->total / g_queue_get_length (&rate->queue);
else
ret = G_MAXUINT;
g_mutex_unlock (&rate->mutex);
return ret;
}

55
ext/dash/gstdownloadrate.h
View file

@ -1,55 +0,0 @@
/* GStreamer
* Copyright (C) 2012 Smart TV Alliance
* Author: Thiago Sousa Santos <thiago.sousa.santos@collabora.com>, Collabora Ltd.
*
* gstdownloadrate.h:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_DOWNLOAD_RATE_H__
#define __GST_DOWNLOAD_RATE_H__
#include <glib-object.h>
#include <gst/gst.h>
G_BEGIN_DECLS
typedef struct _GstDownloadRate GstDownloadRate;
struct _GstDownloadRate
{
GQueue queue;
GMutex mutex;
gint max_length;
guint64 total;
};
void gst_download_rate_init (GstDownloadRate * rate);
void gst_download_rate_deinit (GstDownloadRate * rate);
void gst_download_rate_set_max_length (GstDownloadRate * rate, gint max_length);
gint gst_download_rate_get_max_length (GstDownloadRate * rate);
void gst_download_rate_clear (GstDownloadRate * rate);
void gst_download_rate_add_rate (GstDownloadRate * rate, guint bytes, guint64 time);
guint gst_download_rate_get_current_rate (GstDownloadRate * rate);
G_END_DECLS
#endif /* __GST_DOWNLOAD_RATE_H__ */