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mssdemux: synchronize with the download loop thread to signal it to continue
If EOS or ERROR happens before the download loop thread has reached its g_cond_wait() call, then the g_cond_signal doesn't have any effect and the download loop thread stucks later. https://bugzilla.gnome.org/show_bug.cgi?id=735663
This commit is contained in:
George Kiagiadakis
Thiago Santos
parent
f4546b64ea
commit
e289ab07c1
2 changed files with 66 additions and 31 deletions
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@ -420,8 +420,13 @@ gst_mss_demux_handle_message (GstBin * bin, GstMessage * msg)
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err->domain, err->code, err->message, debug);
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/* error, but ask to retry */
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stream->last_ret = GST_FLOW_CUSTOM_ERROR;
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g_mutex_lock (&stream->fragment_download_lock);
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if (!stream->download_finished) {
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stream->last_ret = GST_FLOW_CUSTOM_ERROR;
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stream->download_finished = TRUE;
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}
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g_cond_signal (&stream->fragment_download_cond);
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g_mutex_unlock (&stream->fragment_download_lock);
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g_error_free (err);
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g_free (debug);
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@ -531,8 +536,12 @@ gst_mss_demux_stop_tasks (GstMssDemux * mssdemux, gboolean immediate)
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gst_task_stop (stream->download_task);
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stream->cancelled = TRUE;
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if (immediate)
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if (immediate) {
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g_mutex_lock (&stream->fragment_download_lock);
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stream->download_finished = TRUE;
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g_cond_signal (&stream->fragment_download_cond);
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g_mutex_unlock (&stream->fragment_download_lock);
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}
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}
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GST_OBJECT_UNLOCK (mssdemux);
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@ -635,22 +644,26 @@ gst_mss_demux_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
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case GST_EVENT_RECONFIGURE:{
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GSList *iter;
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GST_OBJECT_LOCK (mssdemux);
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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->pad == pad) {
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GST_OBJECT_LOCK (mssdemux);
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g_mutex_lock (&stream->fragment_download_lock);
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if (stream->last_ret == GST_FLOW_NOT_LINKED) {
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GST_DEBUG_OBJECT (stream->pad, "Received reconfigure");
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stream->restart_download = TRUE;
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stream->last_ret = GST_FLOW_OK;
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gst_task_start (stream->download_task);
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}
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g_mutex_unlock (&stream->fragment_download_lock);
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GST_OBJECT_UNLOCK (mssdemux);
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gst_event_unref (event);
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return TRUE;
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}
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}
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GST_OBJECT_UNLOCK (mssdemux);
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}
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break;
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case GST_EVENT_LATENCY:{
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@ -1165,10 +1178,14 @@ _src_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
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/* TODO properly stop tasks */
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/* gst_hls_demux_pause_tasks (demux); */
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g_mutex_lock (&stream->fragment_download_lock);
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stream->download_finished = TRUE;
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stream->last_ret = ret;
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g_cond_signal (&stream->fragment_download_cond);
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g_mutex_unlock (&stream->fragment_download_lock);
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}
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/* avoid having the source handle the same error again */
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stream->last_ret = ret;
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ret = GST_FLOW_OK;
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return ret;
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@ -1182,7 +1199,10 @@ _src_event (GstPad * pad, GstObject * parent, GstEvent * event)
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_EOS:
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g_mutex_lock (&stream->fragment_download_lock);
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stream->download_finished = TRUE;
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g_cond_signal (&stream->fragment_download_cond);
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g_mutex_unlock (&stream->fragment_download_lock);
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break;
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default:
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break;
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@ -1241,7 +1261,6 @@ gst_mss_demux_stream_update_source (GstMssDemuxStream * stream,
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if (!gst_uri_is_valid (uri)) {
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GST_WARNING_OBJECT (stream->pad, "Invalid URI: %s", uri);
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stream->last_ret = GST_FLOW_ERROR;
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return FALSE;
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}
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@ -1340,16 +1359,21 @@ gst_mss_demux_stream_update_source (GstMssDemuxStream * stream,
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return TRUE;
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}
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/* must be called with the stream's fragment_download_lock */
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static void
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static GstFlowReturn
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gst_mss_demux_stream_download_uri (GstMssDemux * demux,
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GstMssDemuxStream * stream, const gchar * uri, gint64 start, gint64 end)
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{
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GstFlowReturn ret = GST_FLOW_OK;
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GST_DEBUG_OBJECT (stream->pad, "Downloading uri: %s, range:%" G_GINT64_FORMAT
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" - %" G_GINT64_FORMAT, uri, start, end);
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stream->download_finished = FALSE;
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if (!gst_mss_demux_stream_update_source (stream, uri, NULL, FALSE, TRUE)) {
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return;
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g_mutex_lock (&stream->fragment_download_lock);
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ret = stream->last_ret = GST_FLOW_ERROR;
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g_mutex_unlock (&stream->fragment_download_lock);
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return ret;
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}
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if (gst_element_set_state (stream->src,
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@ -1368,18 +1392,32 @@ gst_mss_demux_stream_download_uri (GstMssDemux * demux,
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}
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}
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g_mutex_lock (&stream->fragment_download_lock);
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if (G_LIKELY (stream->last_ret == GST_FLOW_OK)) {
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stream->download_start_time = g_get_monotonic_time ();
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g_mutex_unlock (&stream->fragment_download_lock);
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gst_element_sync_state_with_parent (stream->src);
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g_mutex_lock (&stream->fragment_download_lock);
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/* wait for the fragment to be completely downloaded */
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GST_DEBUG_OBJECT (stream->pad,
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"Waiting for fragment download to finish: %s", uri);
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g_cond_wait (&stream->fragment_download_cond,
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&stream->fragment_download_lock);
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while (!stream->cancelled && !stream->download_finished) {
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g_cond_wait (&stream->fragment_download_cond,
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&stream->fragment_download_lock);
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}
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ret = stream->last_ret;
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g_mutex_unlock (&stream->fragment_download_lock);
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GST_DEBUG_OBJECT (stream->pad, "Fragment download finished: %s", uri);
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}
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g_mutex_unlock (&stream->fragment_download_lock);
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} else {
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stream->last_ret = GST_FLOW_CUSTOM_ERROR;
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g_mutex_lock (&stream->fragment_download_lock);
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ret = stream->last_ret = GST_FLOW_CUSTOM_ERROR;
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g_mutex_unlock (&stream->fragment_download_lock);
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}
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/* flush the proxypads so that the EOS state is reset */
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@ -1387,6 +1425,8 @@ gst_mss_demux_stream_download_uri (GstMssDemux * demux,
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gst_pad_push_event (stream->src_srcpad, gst_event_new_flush_stop (TRUE));
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gst_element_set_state (stream->src, GST_STATE_READY);
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gst_mss_demux_stream_clear_eos_state (stream);
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return ret;
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}
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static GstFlowReturn
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@ -1397,14 +1437,6 @@ gst_mss_demux_stream_download_fragment (GstMssDemuxStream * stream)
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gchar *url = NULL;
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GstFlowReturn ret = GST_FLOW_OK;
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/* special case for not-linked streams */
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if (stream->last_ret == GST_FLOW_NOT_LINKED) {
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GST_DEBUG_OBJECT (stream->pad, "Skipping download for not-linked stream %p",
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stream);
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return GST_FLOW_NOT_LINKED;
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}
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g_mutex_lock (&stream->fragment_download_lock);
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GST_DEBUG_OBJECT (stream->pad, "Getting url for stream");
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ret = gst_mss_stream_get_fragment_url (stream->manifest_stream, &path);
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switch (ret) {
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@ -1414,13 +1446,10 @@ gst_mss_demux_stream_download_fragment (GstMssDemuxStream * stream)
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g_free (path);
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if (gst_mss_manifest_is_live (mssdemux->manifest)) {
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gst_mss_demux_reload_manifest (mssdemux);
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g_mutex_unlock (&stream->fragment_download_lock);
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return GST_FLOW_OK;
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}
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g_mutex_unlock (&stream->fragment_download_lock);
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return GST_FLOW_EOS;
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case GST_FLOW_ERROR:
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g_mutex_unlock (&stream->fragment_download_lock);
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g_free (path);
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goto error;
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default:
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@ -1435,26 +1464,28 @@ gst_mss_demux_stream_download_fragment (GstMssDemuxStream * stream)
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GST_DEBUG_OBJECT (mssdemux, "Got url '%s' for stream %p", url, stream);
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g_mutex_lock (&stream->fragment_download_lock);
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stream->last_ret = GST_FLOW_OK;
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stream->starting_fragment = TRUE;
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g_mutex_unlock (&stream->fragment_download_lock);
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gst_mss_demux_stream_download_uri (mssdemux, stream, url, 0, -1);
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ret = gst_mss_demux_stream_download_uri (mssdemux, stream, url, 0, -1);
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g_free (path);
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g_free (url);
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g_mutex_unlock (&stream->fragment_download_lock);
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if (stream->last_ret != GST_FLOW_OK) {
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GST_INFO_OBJECT (mssdemux, "No fragment downloaded");
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if (ret != GST_FLOW_OK) {
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GST_INFO_OBJECT (mssdemux, "No fragment downloaded (%d %s)", ret,
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gst_flow_get_name (ret));
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/* TODO check if we are truly stoping */
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if (stream->last_ret != GST_FLOW_ERROR
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&& gst_mss_manifest_is_live (mssdemux->manifest)) {
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if (ret != GST_FLOW_ERROR && gst_mss_manifest_is_live (mssdemux->manifest)) {
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/* looks like there is no way of knowing when a live stream has ended
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* Have to assume we are falling behind and cause a manifest reload */
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return GST_FLOW_OK;
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}
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}
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return stream->last_ret;
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return ret;
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no_url_error:
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{
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@ -1539,7 +1570,6 @@ gst_mss_demux_download_loop (GstMssDemuxStream * stream)
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}
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stream->restart_download = FALSE;
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stream->last_ret = GST_FLOW_OK;
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}
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capsevent = gst_mss_demux_reconfigure_stream (stream);
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GST_OBJECT_UNLOCK (mssdemux);
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@ -1637,12 +1667,16 @@ gst_mss_demux_combine_flows (GstMssDemux * mssdemux)
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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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g_mutex_lock (&stream->fragment_download_lock);
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if (stream->last_ret != GST_FLOW_NOT_LINKED)
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all_notlinked = FALSE;
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if (stream->last_ret <= GST_FLOW_NOT_NEGOTIATED
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|| stream->last_ret == GST_FLOW_FLUSHING)
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|| stream->last_ret == GST_FLOW_FLUSHING) {
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g_mutex_unlock (&stream->fragment_download_lock);
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return stream->last_ret;
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}
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g_mutex_unlock (&stream->fragment_download_lock);
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}
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if (all_notlinked)
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return GST_FLOW_NOT_LINKED;
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@ -85,6 +85,7 @@ struct _GstMssDemuxStream {
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GstPad *src_srcpad;
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GMutex fragment_download_lock;
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GCond fragment_download_cond;
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gboolean download_finished;
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gboolean starting_fragment;
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gint64 download_start_time;
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gint64 download_total_time;
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