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mssdemux: add bitrate-limit property
It allows the plugin to use its own downloading bitrate measures as a feedback to select the best streams bitrate for the current network scenario
This commit is contained in:
Thiago Santos
parent
a0a05b2941
commit
2219a3a1cc
2 changed files with 87 additions and 5 deletions
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@ -81,6 +81,7 @@ GST_DEBUG_CATEGORY (mssdemux_debug);
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#define DEFAULT_CONNECTION_SPEED 0
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#define DEFAULT_MAX_QUEUE_SIZE_BUFFERS 0
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#define DEFAULT_BITRATE_LIMIT 0.8
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enum
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{
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@ -88,6 +89,7 @@ enum
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PROP_CONNECTION_SPEED,
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PROP_MAX_QUEUE_SIZE_BUFFERS,
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PROP_BITRATE_LIMIT,
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PROP_LAST
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};
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@ -173,6 +175,13 @@ gst_mss_demux_class_init (GstMssDemuxClass * klass)
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"(0 = infinite)", 0, G_MAXUINT, DEFAULT_MAX_QUEUE_SIZE_BUFFERS,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_BITRATE_LIMIT,
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g_param_spec_float ("bitrate-limit",
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"Bitrate limit in %",
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"Limit of the available bitrate to use when switching to alternates.",
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0, 1, DEFAULT_BITRATE_LIMIT,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_mss_demux_change_state);
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}
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@ -194,6 +203,7 @@ gst_mss_demux_init (GstMssDemux * mssdemux, GstMssDemuxClass * klass)
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gst_task_set_lock (mssdemux->stream_task, &mssdemux->stream_lock);
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mssdemux->data_queue_max_size = DEFAULT_MAX_QUEUE_SIZE_BUFFERS;
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mssdemux->bitrate_limit = DEFAULT_BITRATE_LIMIT;
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}
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static gboolean
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@ -351,6 +361,9 @@ gst_mss_demux_set_property (GObject * object, guint prop_id,
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case PROP_MAX_QUEUE_SIZE_BUFFERS:
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mssdemux->data_queue_max_size = g_value_get_uint (value);
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break;
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case PROP_BITRATE_LIMIT:
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mssdemux->bitrate_limit = g_value_get_float (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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@ -370,6 +383,9 @@ gst_mss_demux_get_property (GObject * object, guint prop_id, GValue * value,
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case PROP_MAX_QUEUE_SIZE_BUFFERS:
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g_value_set_uint (value, mssdemux->data_queue_max_size);
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break;
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case PROP_BITRATE_LIMIT:
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g_value_set_float (value, mssdemux->bitrate_limit);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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@ -894,17 +910,63 @@ gst_mss_demux_reload_manifest (GstMssDemux * mssdemux)
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g_object_unref (downloader);
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}
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static guint64
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gst_mss_demux_get_download_bitrate (GstMssDemux * mssdemux)
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{
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GSList *iter;
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guint64 total = 0;
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guint64 count = 0;
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for (iter = mssdemux->streams; iter; iter = g_slist_next (iter)) {
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GstMssDemuxStream *stream = iter->data;
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total += stream->download_bitrate;
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count++;
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}
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return total / count;
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}
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static gboolean
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gst_mss_demux_all_streams_have_data (GstMssDemux * mssdemux)
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{
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GSList *iter;
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for (iter = mssdemux->streams; iter; iter = g_slist_next (iter)) {
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GstMssDemuxStream *stream = iter->data;
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if (!stream->have_data)
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return FALSE;
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}
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return TRUE;
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}
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static void
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gst_mss_demux_reconfigure (GstMssDemux * mssdemux)
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{
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GSList *oldpads = NULL;
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GSList *iter;
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guint64 new_bitrate;
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/* TODO lock? */
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if (!gst_mss_demux_all_streams_have_data (mssdemux))
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return;
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new_bitrate = 0.8 * gst_mss_demux_get_download_bitrate (mssdemux) / 1000;
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if (mssdemux->connection_speed) {
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new_bitrate = MIN (mssdemux->connection_speed, new_bitrate);
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}
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GST_DEBUG_OBJECT ("Current suggested bitrate: %llu", new_bitrate);
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gst_mss_demux_stop_tasks (mssdemux, TRUE);
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if (gst_mss_manifest_change_bitrate (mssdemux->manifest,
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mssdemux->connection_speed)) {
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if (gst_mss_manifest_change_bitrate (mssdemux->manifest, new_bitrate)) {
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GstClockTime newseg_ts = GST_CLOCK_TIME_NONE;
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GST_INFO_OBJECT ("Switching to bitrate %llu", new_bitrate);
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GST_DEBUG_OBJECT (mssdemux, "Creating new pad group");
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/* if we changed the bitrate, we need to add new pads */
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for (iter = mssdemux->streams; iter; iter = g_slist_next (iter)) {
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@ -956,6 +1018,7 @@ gst_mss_demux_reconfigure (GstMssDemux * mssdemux)
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gst_mss_demux_expose_stream (mssdemux, stream);
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gst_pad_push_event (oldpad, gst_event_new_eos ());
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stream->have_data = FALSE;
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}
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gst_element_no_more_pads (GST_ELEMENT (mssdemux));
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@ -1018,6 +1081,9 @@ gst_mss_demux_stream_download_fragment (GstMssDemuxStream * stream,
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GstFragment *fragment;
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GstBuffer *_buffer;
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GstFlowReturn ret = GST_FLOW_OK;
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guint64 before_download, after_download;
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before_download = g_get_real_time ();
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GST_DEBUG_OBJECT (mssdemux, "Getting url for stream %p", stream);
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ret = gst_mss_stream_get_fragment_url (stream->manifest_stream, &path);
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@ -1072,7 +1138,15 @@ gst_mss_demux_stream_download_fragment (GstMssDemuxStream * stream,
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if (buffer)
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*buffer = _buffer;
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after_download = g_get_real_time ();
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if (_buffer) {
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guint64 bitrate = 8 * GST_BUFFER_SIZE (_buffer) /
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((after_download - before_download) / 1000000ULL);
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GST_DEBUG_OBJECT (mssdemux, "Measured download bitrate: %s %llu bps",
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GST_PAD_NAME (stream->pad), bitrate);
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stream->download_bitrate = bitrate;
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GST_DEBUG_OBJECT (mssdemux,
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"Storing buffer for stream %p - %s. Timestamp: %" GST_TIME_FORMAT
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" Duration: %" GST_TIME_FORMAT,
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@ -1082,6 +1156,11 @@ gst_mss_demux_stream_download_fragment (GstMssDemuxStream * stream,
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gst_mss_demux_stream_store_object (stream, GST_MINI_OBJECT_CAST (_buffer));
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}
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GST_OBJECT_LOCK (mssdemux);
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mssdemux->update_bitrates = TRUE;
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GST_OBJECT_UNLOCK (mssdemux);
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return ret;
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no_url_error:
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@ -1109,7 +1188,6 @@ gst_mss_demux_download_loop (GstMssDemuxStream * stream)
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GST_LOG_OBJECT (mssdemux, "download loop start %p", stream);
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ret = gst_mss_demux_stream_download_fragment (stream, &buffer);
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switch (ret) {
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case GST_FLOW_OK:
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@ -1167,8 +1245,7 @@ gst_mss_demux_select_latest_stream (GstMssDemux * mssdemux,
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continue;
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}
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if (gst_data_queue_peek (other->dataqueue, &item)) {
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} else {
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if (!gst_data_queue_peek (other->dataqueue, &item)) {
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/* flushing */
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return GST_FLOW_WRONG_STATE;
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}
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@ -1276,6 +1353,7 @@ gst_mss_demux_stream_loop (GstMssDemux * mssdemux)
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stream->next_timestamp =
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GST_BUFFER_TIMESTAMP (object) + GST_BUFFER_DURATION (object);
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stream->have_data = TRUE;
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ret = gst_pad_push (stream->pad, GST_BUFFER_CAST (object));
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} else if (GST_IS_EVENT (object)) {
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if (GST_EVENT_TYPE (object) == GST_EVENT_EOS)
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@ -70,6 +70,9 @@ struct _GstMssDemuxStream {
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GStaticRecMutex download_lock;
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gboolean eos;
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gboolean have_data;
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guint64 download_bitrate;
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};
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struct _GstMssDemux {
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@ -97,6 +100,7 @@ struct _GstMssDemux {
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/* properties */
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guint64 connection_speed; /* in bps */
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guint data_queue_max_size;
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gfloat bitrate_limit;
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};
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struct _GstMssDemuxClass {
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