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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Make a function for adding a stream to a period, for better encapsulation. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
361 lines
10 KiB
C
361 lines
10 KiB
C
/* GStreamer
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*
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* Copyright (C) 2021-2022 Centricular Ltd
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* Author: Edward Hervey <edward@centricular.com>
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* Author: Jan Schmidt <jan@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstadaptivedemux.h"
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#include "gstadaptivedemux-private.h"
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GST_DEBUG_CATEGORY_EXTERN (adaptivedemux2_debug);
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#define GST_CAT_DEFAULT adaptivedemux2_debug
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GstAdaptiveDemuxPeriod *
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gst_adaptive_demux_period_new (GstAdaptiveDemux * demux)
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{
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GstAdaptiveDemuxPeriod *period;
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period = g_new0 (GstAdaptiveDemuxPeriod, 1);
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g_atomic_int_set (&period->ref_count, 1);
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period->demux = demux;
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period->period_num = demux->priv->n_periods++;
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period->next_input_wakeup_time = GST_CLOCK_STIME_NONE;
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g_queue_push_tail (demux->priv->periods, period);
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return period;
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}
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static void
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_demux_period_free (GstAdaptiveDemuxPeriod * period)
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{
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/* Disable and remove all streams and tracks. */
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g_list_free_full (period->streams, (GDestroyNotify) gst_object_unref);
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if (period->collection)
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gst_object_unref (period->collection);
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/* Theoretically all tracks should have gone by now */
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GST_DEBUG ("Disabling and removing all tracks");
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g_list_free_full (period->tracks,
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(GDestroyNotify) gst_adaptive_demux_track_unref);
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g_free (period);
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}
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GstAdaptiveDemuxPeriod *
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gst_adaptive_demux_period_ref (GstAdaptiveDemuxPeriod * period)
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{
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g_return_val_if_fail (period != NULL, NULL);
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GST_TRACE ("%p %d -> %d", period, period->ref_count, period->ref_count + 1);
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g_atomic_int_inc (&period->ref_count);
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return period;
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}
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void
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gst_adaptive_demux_period_unref (GstAdaptiveDemuxPeriod * period)
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{
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g_return_if_fail (period != NULL);
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GST_TRACE ("%p %d -> %d", period, period->ref_count, period->ref_count - 1);
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if (g_atomic_int_dec_and_test (&period->ref_count)) {
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_demux_period_free (period);
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}
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}
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static GstAdaptiveDemuxTrack *
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default_track_for_stream_type_locked (GstAdaptiveDemuxPeriod * period,
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GstStreamType stream_type)
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{
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GList *tmp;
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GstAdaptiveDemuxTrack *res = NULL, *select = NULL;
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for (tmp = period->tracks; tmp; tmp = tmp->next) {
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GstAdaptiveDemuxTrack *cand = tmp->data;
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if (cand->type == stream_type) {
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/* If selected, we're done */
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if (cand->selected)
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return cand;
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if (!select && cand->flags & GST_STREAM_FLAG_SELECT)
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res = select = cand;
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if (res == NULL)
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res = cand;
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}
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}
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return res;
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}
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/* called with TRACKS_LOCK taken */
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void
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gst_adaptive_demux_period_select_default_tracks (GstAdaptiveDemux * demux,
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GstAdaptiveDemuxPeriod * period)
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{
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GstAdaptiveDemuxTrack *track;
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gboolean changed = FALSE;
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GST_DEBUG_OBJECT (demux, "Picking a default selection");
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/* Do initial selection (pick default for each type) */
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if ((track =
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default_track_for_stream_type_locked (period,
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GST_STREAM_TYPE_VIDEO))) {
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GST_DEBUG_OBJECT (demux, "Selecting default video track %s",
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track->stream_id);
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if (!track->selected) {
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changed = TRUE;
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track->selected = TRUE;
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gst_pad_set_active (track->sinkpad, TRUE);
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}
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}
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if ((track =
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default_track_for_stream_type_locked (period,
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GST_STREAM_TYPE_AUDIO))) {
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GST_DEBUG_OBJECT (demux, "Selecting default audio track %s",
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track->stream_id);
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if (!track->selected) {
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changed = TRUE;
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track->selected = TRUE;
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gst_pad_set_active (track->sinkpad, TRUE);
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}
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}
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if ((track =
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default_track_for_stream_type_locked (period,
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GST_STREAM_TYPE_TEXT))) {
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GST_DEBUG_OBJECT (demux, "Selecting default text track %s",
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track->stream_id);
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if (!track->selected) {
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changed = TRUE;
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track->selected = TRUE;
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gst_pad_set_active (track->sinkpad, TRUE);
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}
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}
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if (changed)
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g_atomic_int_set (&demux->priv->requested_selection_seqnum,
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gst_util_seqnum_next ());
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}
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static GstAdaptiveDemuxTrack *
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gst_adaptive_demux_period_find_matching_track (GstAdaptiveDemuxPeriod * period,
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GstAdaptiveDemuxTrack * track)
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{
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GList *iter;
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for (iter = period->tracks; iter; iter = iter->next) {
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GstAdaptiveDemuxTrack *cand = iter->data;
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if (!cand->selected && cand->type == track->type) {
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/* FIXME : Improve this a *lot* */
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if (!g_strcmp0 (cand->stream_id, track->stream_id))
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return cand;
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}
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}
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return NULL;
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}
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void
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gst_adaptive_demux_period_transfer_selection (GstAdaptiveDemux * demux,
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GstAdaptiveDemuxPeriod * next_period,
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GstAdaptiveDemuxPeriod * current_period)
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{
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GList *iter;
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for (iter = current_period->tracks; iter; iter = iter->next) {
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GstAdaptiveDemuxTrack *track = iter->data;
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if (track->selected) {
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GstAdaptiveDemuxTrack *new_track =
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gst_adaptive_demux_period_find_matching_track (next_period, track);
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if (new_track) {
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GST_DEBUG_OBJECT (demux,
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"Selecting replacement track %s (period %u) for track %s (period %d)",
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new_track->stream_id, new_track->period_num, track->stream_id,
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track->period_num);
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new_track->selected = TRUE;
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gst_pad_set_active (new_track->sinkpad, TRUE);
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} else {
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GST_WARNING_OBJECT (demux,
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"Could not find replacement track for %s (period %u) in period %u",
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track->stream_id, track->period_num, current_period->period_num);
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/* FIXME : Pick a default for that type ? Just continue as-is ? */
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}
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}
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}
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}
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/* called with TRACKS_LOCK taken. Takes ownership of the stream */
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gboolean
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gst_adaptive_demux_period_add_stream (GstAdaptiveDemuxPeriod * period,
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GstAdaptiveDemux2Stream * stream)
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{
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GST_LOG ("period %d stream: %" GST_PTR_FORMAT, period->period_num, stream);
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/* Set the stream's period */
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stream->period = period;
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period->streams = g_list_append (period->streams, stream);
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/* Add any pre-existing stream tracks to our set */
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if (stream->tracks) {
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GList *iter;
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for (iter = stream->tracks; iter; iter = iter->next) {
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GstAdaptiveDemuxTrack *track = (GstAdaptiveDemuxTrack *) iter->data;
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if (!gst_adaptive_demux_period_add_track (period, track)) {
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GST_ERROR_OBJECT (period->demux, "period %d failed to add track %p",
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period->period_num, track);
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return FALSE;
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}
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}
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}
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return TRUE;
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}
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/* called with TRACKS_LOCK taken */
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gboolean
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gst_adaptive_demux_period_add_track (GstAdaptiveDemuxPeriod * period,
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GstAdaptiveDemuxTrack * track)
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{
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GST_LOG ("period %d track:%p", period->period_num, track);
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/* Actually create and add the elements to the demuxer */
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if (!gst_adaptive_demux_track_add_elements (track, period->period_num)) {
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GST_ERROR ("Failed to add track");
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return FALSE;
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}
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period->tracks =
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g_list_append (period->tracks, gst_adaptive_demux_track_ref (track));
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period->tracks_changed = TRUE;
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return TRUE;
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}
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/* must be called with manifest_lock taken */
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GstFlowReturn
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gst_adaptive_demux_period_combine_stream_flows (GstAdaptiveDemuxPeriod * period)
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{
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gboolean all_notlinked = TRUE;
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gboolean all_eos = TRUE;
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GList *iter;
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for (iter = period->streams; iter; iter = g_list_next (iter)) {
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GstAdaptiveDemux2Stream *stream = iter->data;
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/* Streams that are not running do not contribute to the flow,
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* so ignore streams with no selected tracks */
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if (!gst_adaptive_demux2_stream_is_selected (stream))
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continue;
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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_EOS)
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all_eos = FALSE;
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}
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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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return stream->last_ret;
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}
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}
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if (all_notlinked)
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return GST_FLOW_NOT_LINKED;
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if (all_eos)
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return GST_FLOW_EOS;
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return GST_FLOW_OK;
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}
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void
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gst_adaptive_demux_period_stop_tasks (GstAdaptiveDemuxPeriod * period)
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{
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GList *iter;
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for (iter = period->streams; iter; iter = g_list_next (iter)) {
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GstAdaptiveDemux2Stream *stream = iter->data;
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gst_adaptive_demux2_stream_stop (stream);
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stream->download_error_count = 0;
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stream->need_header = TRUE;
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}
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}
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gboolean
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gst_adaptive_demux_period_has_pending_tracks (GstAdaptiveDemuxPeriod * period)
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{
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GList *iter;
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for (iter = period->streams; iter; iter = g_list_next (iter)) {
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GstAdaptiveDemux2Stream *stream = iter->data;
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if (stream->pending_tracks)
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return TRUE;
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}
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return FALSE;
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}
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/* Called from the output thread, holding the tracks lock */
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void
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gst_adaptive_demux_period_check_input_wakeup_locked (GstAdaptiveDemuxPeriod *
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period, GstClockTimeDiff current_output_position)
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{
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/* Fast case: It's not time to wake up yet */
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if (period->next_input_wakeup_time == GST_CLOCK_STIME_NONE ||
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period->next_input_wakeup_time > current_output_position) {
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return;
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}
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/* Slow case: Somewhere there's a stream that needs waking up */
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GList *iter;
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GstClockTimeDiff next_input_wakeup_time = GST_CLOCK_STIME_NONE;
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for (iter = period->streams; iter; iter = g_list_next (iter)) {
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GstAdaptiveDemux2Stream *stream = iter->data;
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if (stream->next_input_wakeup_time == GST_CLOCK_STIME_NONE)
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continue;
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if (stream->next_input_wakeup_time < current_output_position) {
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GST_LOG_OBJECT (stream, "Waking for more input at time %" GST_TIME_FORMAT,
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GST_TIME_ARGS (current_output_position));
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gst_adaptive_demux2_stream_on_output_space_available (stream);
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} else if (next_input_wakeup_time == GST_CLOCK_STIME_NONE ||
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/* Otherwise this stream will need waking in the future, accumulate
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* the earliest stream wakeup time */
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stream->next_input_wakeup_time < next_input_wakeup_time) {
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next_input_wakeup_time = stream->next_input_wakeup_time;
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}
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}
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period->next_input_wakeup_time = next_input_wakeup_time;
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}
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