gstreamer/subprojects/gst-plugins-good/ext/adaptivedemux2/gstadaptivedemux-period.c

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/* GStreamer
*
* Copyright (C) 2021-2022 Centricular Ltd
* Author: Edward Hervey <edward@centricular.com>
* Author: Jan Schmidt <jan@centricular.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstadaptivedemux.h"
#include "gstadaptivedemux-private.h"
GST_DEBUG_CATEGORY_EXTERN (adaptivedemux2_debug);
#define GST_CAT_DEFAULT adaptivedemux2_debug
GstAdaptiveDemuxPeriod *
gst_adaptive_demux_period_new (GstAdaptiveDemux * demux)
{
GstAdaptiveDemuxPeriod *period;
period = g_new0 (GstAdaptiveDemuxPeriod, 1);
g_atomic_int_set (&period->ref_count, 1);
period->demux = demux;
period->period_num = demux->priv->n_periods++;
period->next_input_wakeup_time = GST_CLOCK_STIME_NONE;
g_queue_push_tail (demux->priv->periods, period);
return period;
}
static void
_demux_period_free (GstAdaptiveDemuxPeriod * period)
{
/* Disable and remove all streams and tracks. */
g_list_free_full (period->streams, (GDestroyNotify) gst_object_unref);
if (period->collection)
gst_object_unref (period->collection);
/* Theoretically all tracks should have gone by now */
GST_DEBUG ("Disabling and removing all tracks");
g_list_free_full (period->tracks,
(GDestroyNotify) gst_adaptive_demux_track_unref);
g_free (period);
}
GstAdaptiveDemuxPeriod *
gst_adaptive_demux_period_ref (GstAdaptiveDemuxPeriod * period)
{
g_return_val_if_fail (period != NULL, NULL);
GST_TRACE ("%p %d -> %d", period, period->ref_count, period->ref_count + 1);
g_atomic_int_inc (&period->ref_count);
return period;
}
void
gst_adaptive_demux_period_unref (GstAdaptiveDemuxPeriod * period)
{
g_return_if_fail (period != NULL);
GST_TRACE ("%p %d -> %d", period, period->ref_count, period->ref_count - 1);
if (g_atomic_int_dec_and_test (&period->ref_count)) {
_demux_period_free (period);
}
}
static GstAdaptiveDemuxTrack *
default_track_for_stream_type_locked (GstAdaptiveDemuxPeriod * period,
GstStreamType stream_type)
{
GList *tmp;
GstAdaptiveDemuxTrack *res = NULL, *select = NULL;
for (tmp = period->tracks; tmp; tmp = tmp->next) {
GstAdaptiveDemuxTrack *cand = tmp->data;
if (cand->type == stream_type) {
/* If selected, we're done */
if (cand->selected)
return cand;
if (!select && cand->flags & GST_STREAM_FLAG_SELECT)
res = select = cand;
if (res == NULL)
res = cand;
}
}
return res;
}
/* called with TRACKS_LOCK taken */
void
gst_adaptive_demux_period_select_default_tracks (GstAdaptiveDemux * demux,
GstAdaptiveDemuxPeriod * period)
{
GstAdaptiveDemuxTrack *track;
gboolean changed = FALSE;
GST_DEBUG_OBJECT (demux, "Picking a default selection");
/* Do initial selection (pick default for each type) */
if ((track =
default_track_for_stream_type_locked (period,
GST_STREAM_TYPE_VIDEO))) {
GST_DEBUG_OBJECT (demux, "Selecting default video track %s",
track->stream_id);
if (!track->selected) {
changed = TRUE;
track->selected = TRUE;
gst_pad_set_active (track->sinkpad, TRUE);
}
}
if ((track =
default_track_for_stream_type_locked (period,
GST_STREAM_TYPE_AUDIO))) {
GST_DEBUG_OBJECT (demux, "Selecting default audio track %s",
track->stream_id);
if (!track->selected) {
changed = TRUE;
track->selected = TRUE;
gst_pad_set_active (track->sinkpad, TRUE);
}
}
if ((track =
default_track_for_stream_type_locked (period,
GST_STREAM_TYPE_TEXT))) {
GST_DEBUG_OBJECT (demux, "Selecting default text track %s",
track->stream_id);
if (!track->selected) {
changed = TRUE;
track->selected = TRUE;
gst_pad_set_active (track->sinkpad, TRUE);
}
}
if (changed)
g_atomic_int_set (&demux->priv->requested_selection_seqnum,
gst_util_seqnum_next ());
}
static GstAdaptiveDemuxTrack *
gst_adaptive_demux_period_find_matching_track (GstAdaptiveDemuxPeriod * period,
GstAdaptiveDemuxTrack * track)
{
GList *iter;
for (iter = period->tracks; iter; iter = iter->next) {
GstAdaptiveDemuxTrack *cand = iter->data;
if (!cand->selected && cand->type == track->type) {
/* FIXME : Improve this a *lot* */
if (!g_strcmp0 (cand->stream_id, track->stream_id))
return cand;
}
}
return NULL;
}
void
gst_adaptive_demux_period_transfer_selection (GstAdaptiveDemux * demux,
GstAdaptiveDemuxPeriod * next_period,
GstAdaptiveDemuxPeriod * current_period)
{
GList *iter;
for (iter = current_period->tracks; iter; iter = iter->next) {
GstAdaptiveDemuxTrack *track = iter->data;
if (track->selected) {
GstAdaptiveDemuxTrack *new_track =
gst_adaptive_demux_period_find_matching_track (next_period, track);
if (new_track) {
GST_DEBUG_OBJECT (demux,
"Selecting replacement track %s (period %u) for track %s (period %d)",
new_track->stream_id, new_track->period_num, track->stream_id,
track->period_num);
new_track->selected = TRUE;
gst_pad_set_active (new_track->sinkpad, TRUE);
} else {
GST_WARNING_OBJECT (demux,
"Could not find replacement track for %s (period %u) in period %u",
track->stream_id, track->period_num, current_period->period_num);
/* FIXME : Pick a default for that type ? Just continue as-is ? */
}
}
}
}
/* called with TRACKS_LOCK taken. Takes ownership of the stream */
gboolean
gst_adaptive_demux_period_add_stream (GstAdaptiveDemuxPeriod * period,
GstAdaptiveDemux2Stream * stream)
{
GST_LOG ("period %d stream: %" GST_PTR_FORMAT, period->period_num, stream);
/* Set the stream's period */
stream->period = period;
period->streams = g_list_append (period->streams, stream);
/* Add any pre-existing stream tracks to our set */
if (stream->tracks) {
GList *iter;
for (iter = stream->tracks; iter; iter = iter->next) {
GstAdaptiveDemuxTrack *track = (GstAdaptiveDemuxTrack *) iter->data;
if (!gst_adaptive_demux_period_add_track (period, track)) {
GST_ERROR_OBJECT (period->demux, "period %d failed to add track %p",
period->period_num, track);
return FALSE;
}
}
}
return TRUE;
}
/* called with TRACKS_LOCK taken */
gboolean
gst_adaptive_demux_period_add_track (GstAdaptiveDemuxPeriod * period,
GstAdaptiveDemuxTrack * track)
{
GST_LOG ("period %d track:%p", period->period_num, track);
/* Actually create and add the elements to the demuxer */
if (!gst_adaptive_demux_track_add_elements (track, period->period_num)) {
GST_ERROR ("Failed to add track");
return FALSE;
}
period->tracks =
g_list_append (period->tracks, gst_adaptive_demux_track_ref (track));
period->tracks_changed = TRUE;
return TRUE;
}
/* must be called with manifest_lock taken */
GstFlowReturn
gst_adaptive_demux_period_combine_stream_flows (GstAdaptiveDemuxPeriod * period)
{
gboolean all_notlinked = TRUE;
gboolean all_eos = TRUE;
GList *iter;
for (iter = period->streams; iter; iter = g_list_next (iter)) {
GstAdaptiveDemux2Stream *stream = iter->data;
/* Streams that are not running do not contribute to the flow,
* so ignore streams with no selected tracks */
if (!gst_adaptive_demux2_stream_is_selected (stream))
continue;
if (stream->last_ret != GST_FLOW_NOT_LINKED) {
all_notlinked = FALSE;
if (stream->last_ret != GST_FLOW_EOS)
all_eos = FALSE;
}
if (stream->last_ret <= GST_FLOW_NOT_NEGOTIATED
|| stream->last_ret == GST_FLOW_FLUSHING) {
return stream->last_ret;
}
}
if (all_notlinked)
return GST_FLOW_NOT_LINKED;
if (all_eos)
return GST_FLOW_EOS;
return GST_FLOW_OK;
}
void
gst_adaptive_demux_period_stop_tasks (GstAdaptiveDemuxPeriod * period)
{
GList *iter;
for (iter = period->streams; iter; iter = g_list_next (iter)) {
GstAdaptiveDemux2Stream *stream = iter->data;
gst_adaptive_demux2_stream_stop (stream);
stream->download_error_count = 0;
stream->need_header = TRUE;
}
}
gboolean
gst_adaptive_demux_period_has_pending_tracks (GstAdaptiveDemuxPeriod * period)
{
GList *iter;
for (iter = period->streams; iter; iter = g_list_next (iter)) {
GstAdaptiveDemux2Stream *stream = iter->data;
if (stream->pending_tracks)
return TRUE;
}
return FALSE;
}
/* Called from the output thread, holding the tracks lock */
void
gst_adaptive_demux_period_check_input_wakeup_locked (GstAdaptiveDemuxPeriod *
period, GstClockTimeDiff current_output_position)
{
/* Fast case: It's not time to wake up yet */
if (period->next_input_wakeup_time == GST_CLOCK_STIME_NONE ||
period->next_input_wakeup_time > current_output_position) {
return;
}
/* Slow case: Somewhere there's a stream that needs waking up */
GList *iter;
GstClockTimeDiff next_input_wakeup_time = GST_CLOCK_STIME_NONE;
for (iter = period->streams; iter; iter = g_list_next (iter)) {
GstAdaptiveDemux2Stream *stream = iter->data;
if (stream->next_input_wakeup_time == GST_CLOCK_STIME_NONE)
continue;
if (stream->next_input_wakeup_time < current_output_position) {
GST_LOG_OBJECT (stream, "Waking for more input at time %" GST_TIME_FORMAT,
GST_TIME_ARGS (current_output_position));
gst_adaptive_demux2_stream_on_output_space_available (stream);
} else if (next_input_wakeup_time == GST_CLOCK_STIME_NONE ||
/* Otherwise this stream will need waking in the future, accumulate
* the earliest stream wakeup time */
stream->next_input_wakeup_time < next_input_wakeup_time) {
next_input_wakeup_time = stream->next_input_wakeup_time;
}
}
period->next_input_wakeup_time = next_input_wakeup_time;
}