static gboolean
gst_hls_demux_update_thread (GstHLSDemux * demux)
{
/* Loop for the updates. It's started when the first fragments are cached and
* schedules the next update of the playlist (for lives sources) and the next
* update of fragments. When a new fragment is downloaded, it compares the
* download time with the next scheduled update to check if we can or should
* switch to a different bitrate */
g_mutex_lock (demux->thread_lock);
while (TRUE) {
/* block until the next scheduled update or the signal to quit this thread */
if (g_cond_timed_wait (demux->thread_cond, demux->thread_lock,
&demux->next_update)) {
goto quit;
}
/* update the playlist for live sources */
if (gst_m3u8_client_is_live (demux->client)) {
if (!gst_hls_demux_update_playlist (demux, TRUE)) {
GST_ERROR_OBJECT (demux, "Could not update the playlist");
goto quit;
}
}
/* schedule the next update */
gst_hls_demux_schedule (demux);
/* if it's a live source and the playlist couldn't be updated, there aren't
* more fragments in the playlist, so we just wait for the next schedulled
* update */
if (gst_m3u8_client_is_live (demux->client) &&
demux->client->update_failed_count > 0) {
GST_WARNING_OBJECT (demux,
"The playlist hasn't been updated, failed count is %d",
demux->client->update_failed_count);
continue;
}
/* fetch the next fragment */
if (!gst_hls_demux_get_next_fragment (demux, TRUE)) {
if (!demux->end_of_playlist && !demux->cancelled)
GST_ERROR_OBJECT (demux, "Could not fetch the next fragment");
goto quit;
}
/* try to switch to another bitrate if needed */
gst_hls_demux_switch_playlist (demux);
}
quit:
{
g_mutex_unlock (demux->thread_lock);
return TRUE;
}
}
static gboolean
gst_hls_demux_cache_fragments (GstHLSDemux * demux)
{
gint i;
/* Start parsing the main playlist */
gst_m3u8_client_set_current (demux->client, demux->client->main);
if (gst_m3u8_client_is_live (demux->client)) {
if (!gst_hls_demux_update_playlist (demux, FALSE)) {
GST_ERROR_OBJECT (demux, "Could not fetch the main playlist %s",
demux->client->main->uri);
return FALSE;
}
}
/* If this playlist is a variant playlist, select the first one
* and update it */
if (gst_m3u8_client_has_variant_playlist (demux->client)) {
GstM3U8 *child = demux->client->main->lists->data;
gst_m3u8_client_set_current (demux->client, child);
if (!gst_hls_demux_update_playlist (demux, FALSE)) {
GST_ERROR_OBJECT (demux, "Could not fetch the child playlist %s",
child->uri);
return FALSE;
}
}
/* If it's a live source, set the sequence number to the end of the list
* and substract the 'fragmets_cache' to start from the last fragment*/
if (gst_m3u8_client_is_live (demux->client)) {
demux->client->sequence += g_list_length (demux->client->current->files);
if (demux->client->sequence >= demux->fragments_cache)
demux->client->sequence -= demux->fragments_cache;
else
demux->client->sequence = 0;
}
/* Cache the first fragments */
for (i = 0; i < demux->fragments_cache - 1; i++) {
if (!gst_hls_demux_get_next_fragment (demux, FALSE)) {
if (!demux->cancelled)
GST_ERROR_OBJECT (demux, "Error caching the first fragments");
return FALSE;
}
/* make sure we stop caching fragments if something cancelled it */
if (demux->cancelled)
return FALSE;
}
g_get_current_time (&demux->next_update);
demux->need_cache = FALSE;
return TRUE;
}
static gboolean
gst_hls_demux_is_live (GstAdaptiveDemux * demux)
{
GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (demux);
return gst_m3u8_client_is_live (hlsdemux->client);
}
static void
check_on_demand_playlist (const gchar * data)
{
GstM3U8Client *client;
GstM3U8 *pl;
GstM3U8MediaFile *file;
client = load_playlist (data);
pl = client->current;
/* Sequence should be 0 as it's an ondemand playlist */
assert_equals_int (client->sequence, 0);
/* Check that we are not live */
assert_equals_int (gst_m3u8_client_is_live (client), FALSE);
/* Check number of entries */
assert_equals_int (g_list_length (pl->files), 4);
/* Check first media segments */
file = GST_M3U8_MEDIA_FILE (g_list_first (pl->files)->data);
assert_equals_string (file->uri, "http://media.example.com/001.ts");
assert_equals_int (file->sequence, 0);
/* Check last media segments */
file = GST_M3U8_MEDIA_FILE (g_list_last (pl->files)->data);
assert_equals_string (file->uri, "http://media.example.com/004.ts");
assert_equals_int (file->sequence, 3);
gst_m3u8_client_free (client);
}
static gboolean
gst_hls_demux_sink_event (GstPad * pad, GstEvent * event)
{
GstHLSDemux *demux = GST_HLS_DEMUX (gst_pad_get_parent (pad));
GstQuery *query;
gboolean ret;
gchar *uri;
switch (event->type) {
case GST_EVENT_EOS:{
gchar *playlist;
if (demux->playlist == NULL) {
GST_WARNING_OBJECT (demux, "Received EOS without a playlist.");
break;
}
GST_DEBUG_OBJECT (demux,
"Got EOS on the sink pad: main playlist fetched");
query = gst_query_new_uri ();
ret = gst_pad_peer_query (demux->sinkpad, query);
if (ret) {
gst_query_parse_uri (query, &uri);
gst_hls_demux_set_location (demux, uri);
g_free (uri);
}
gst_query_unref (query);
playlist = gst_hls_src_buf_to_utf8_playlist ((gchar *)
GST_BUFFER_DATA (demux->playlist), GST_BUFFER_SIZE (demux->playlist));
gst_buffer_unref (demux->playlist);
if (playlist == NULL) {
GST_WARNING_OBJECT (demux, "Error validating first playlist.");
} else if (!gst_m3u8_client_update (demux->client, playlist)) {
/* In most cases, this will happen if we set a wrong url in the
* source element and we have received the 404 HTML response instead of
* the playlist */
GST_ELEMENT_ERROR (demux, STREAM, DECODE, ("Invalid playlist."), NULL);
return FALSE;
}
if (!ret && gst_m3u8_client_is_live (demux->client)) {
GST_ELEMENT_ERROR (demux, RESOURCE, NOT_FOUND,
("Failed querying the playlist uri, "
"required for live sources."), NULL);
return FALSE;
}
gst_task_start (demux->task);
gst_event_unref (event);
return TRUE;
}
default:
break;
}
return gst_pad_event_default (pad, event);
}
static gboolean
gst_hls_demux_update_playlist (GstHLSDemux * demux, gboolean update)
{
GstFragment *download;
GstBuffer *buf;
gchar *playlist;
gboolean updated = FALSE;
const gchar *uri = gst_m3u8_client_get_current_uri (demux->client);
download = gst_uri_downloader_fetch_uri (demux->downloader, uri);
if (download == NULL)
return FALSE;
buf = gst_fragment_get_buffer (download);
playlist = gst_hls_src_buf_to_utf8_playlist (buf);
g_object_unref (download);
if (playlist == NULL) {
GST_WARNING_OBJECT (demux, "Couldn't not validate playlist encoding");
return FALSE;
}
updated = gst_m3u8_client_update (demux->client, playlist);
/* If it's a live source, do not let the sequence number go beyond
* three fragments before the end of the list */
if (updated && update == FALSE && demux->client->current &&
gst_m3u8_client_is_live (demux->client)) {
guint last_sequence;
GST_M3U8_CLIENT_LOCK (demux->client);
last_sequence =
GST_M3U8_MEDIA_FILE (g_list_last (demux->client->current->
files)->data)->sequence;
if (demux->client->sequence >= last_sequence - 3) {
GST_DEBUG_OBJECT (demux, "Sequence is beyond playlist. Moving back to %d",
last_sequence - 3);
demux->need_segment = TRUE;
demux->client->sequence = last_sequence - 3;
}
GST_M3U8_CLIENT_UNLOCK (demux->client);
}
return updated;
}
static gboolean
gst_hls_demux_src_query (GstPad * pad, GstQuery * query)
{
GstHLSDemux *hlsdemux;
gboolean ret = FALSE;
if (query == NULL)
return FALSE;
hlsdemux = GST_HLS_DEMUX (gst_pad_get_element_private (pad));
switch (query->type) {
case GST_QUERY_DURATION:{
GstClockTime duration = -1;
GstFormat fmt;
gst_query_parse_duration (query, &fmt, NULL);
if (fmt == GST_FORMAT_TIME) {
duration = gst_m3u8_client_get_duration (hlsdemux->client);
if (GST_CLOCK_TIME_IS_VALID (duration) && duration > 0) {
gst_query_set_duration (query, GST_FORMAT_TIME, duration);
ret = TRUE;
}
}
GST_INFO_OBJECT (hlsdemux, "GST_QUERY_DURATION returns %s with duration %"
GST_TIME_FORMAT, ret ? "TRUE" : "FALSE", GST_TIME_ARGS (duration));
break;
}
case GST_QUERY_URI:
if (hlsdemux->client) {
/* FIXME: Do we answer with the variant playlist, with the current
* playlist or the the uri of the least downlowaded fragment? */
gst_query_set_uri (query, hlsdemux->client->current->uri);
ret = TRUE;
}
break;
case GST_QUERY_SEEKING:{
GstFormat fmt;
gint64 stop = -1;
gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
GST_INFO_OBJECT (hlsdemux, "Received GST_QUERY_SEEKING with format %d",
fmt);
if (fmt == GST_FORMAT_TIME) {
GstClockTime duration;
duration = gst_m3u8_client_get_duration (hlsdemux->client);
if (GST_CLOCK_TIME_IS_VALID (duration) && duration > 0)
stop = duration;
gst_query_set_seeking (query, fmt,
!gst_m3u8_client_is_live (hlsdemux->client), 0, stop);
ret = TRUE;
GST_INFO_OBJECT (hlsdemux, "GST_QUERY_SEEKING returning with stop : %"
GST_TIME_FORMAT, GST_TIME_ARGS (stop));
}
break;
}
default:
/* Don't fordward queries upstream because of the special nature of this
* "demuxer", which relies on the upstream element only to be fed with the
* first playlist */
break;
}
return ret;
}
static gboolean
gst_hls_demux_src_event (GstPad * pad, GstEvent * event)
{
GstHLSDemux *demux;
demux = GST_HLS_DEMUX (gst_pad_get_element_private (pad));
switch (event->type) {
case GST_EVENT_SEEK:
{
gdouble rate;
GstFormat format;
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
GList *walk;
gint current_pos;
gint current_sequence;
gint target_second;
GstM3U8MediaFile *file;
GST_INFO_OBJECT (demux, "Received GST_EVENT_SEEK");
if (gst_m3u8_client_is_live (demux->client)) {
GST_WARNING_OBJECT (demux, "Received seek event for live stream");
return FALSE;
}
gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
&stop_type, &stop);
if (format != GST_FORMAT_TIME)
return FALSE;
GST_DEBUG_OBJECT (demux, "seek event, rate: %f start: %" GST_TIME_FORMAT
" stop: %" GST_TIME_FORMAT, rate, GST_TIME_ARGS (start),
GST_TIME_ARGS (stop));
file = GST_M3U8_MEDIA_FILE (demux->client->current->files->data);
current_sequence = file->sequence;
current_pos = 0;
target_second = start / GST_SECOND;
GST_DEBUG_OBJECT (demux, "Target seek to %d", target_second);
for (walk = demux->client->current->files; walk; walk = walk->next) {
file = walk->data;
current_sequence = file->sequence;
if (current_pos <= target_second
&& target_second < current_pos + file->duration) {
break;
}
current_pos += file->duration;
}
if (walk == NULL) {
GST_WARNING_OBJECT (demux, "Could not find seeked fragment");
return FALSE;
}
if (flags & GST_SEEK_FLAG_FLUSH) {
GST_DEBUG_OBJECT (demux, "sending flush start");
gst_pad_push_event (demux->srcpad, gst_event_new_flush_start ());
}
demux->cancelled = TRUE;
gst_task_pause (demux->task);
g_mutex_lock (demux->fetcher_lock);
gst_hls_demux_stop_fetcher (demux, TRUE);
g_mutex_unlock (demux->fetcher_lock);
g_mutex_lock (demux->thread_lock);
g_cond_signal (demux->thread_cond);
g_mutex_unlock (demux->thread_lock);
gst_task_pause (demux->task);
/* wait for streaming to finish */
g_static_rec_mutex_lock (&demux->task_lock);
demux->need_cache = TRUE;
while (!g_queue_is_empty (demux->queue)) {
GstBuffer *buf = g_queue_pop_head (demux->queue);
gst_buffer_unref (buf);
}
GST_DEBUG_OBJECT (demux, "seeking to sequence %d", current_sequence);
demux->client->sequence = current_sequence;
demux->position = start;
demux->need_segment = TRUE;
if (flags & GST_SEEK_FLAG_FLUSH) {
GST_DEBUG_OBJECT (demux, "sending flush stop");
gst_pad_push_event (demux->srcpad, gst_event_new_flush_stop ());
}
demux->cancelled = FALSE;
gst_task_start (demux->task);
g_static_rec_mutex_unlock (&demux->task_lock);
return TRUE;
}
default:
break;
}
return gst_pad_event_default (pad, event);
}
static gboolean
gst_hls_demux_update_playlist (GstHLSDemux * demux, gboolean update,
GError ** err)
{
GstAdaptiveDemux *adaptive_demux = GST_ADAPTIVE_DEMUX (demux);
GstFragment *download;
GstBuffer *buf;
gchar *playlist;
gboolean main_checked = FALSE, updated = FALSE;
gchar *uri, *main_uri;
retry:
uri = gst_m3u8_client_get_current_uri (demux->client);
main_uri = gst_m3u8_client_get_uri (demux->client);
download =
gst_uri_downloader_fetch_uri (adaptive_demux->downloader, uri, main_uri,
TRUE, TRUE, TRUE, err);
g_free (main_uri);
if (download == NULL) {
gchar *base_uri;
if (!update || main_checked
|| !gst_m3u8_client_has_variant_playlist (demux->client)) {
g_free (uri);
return FALSE;
}
g_clear_error (err);
main_uri = gst_m3u8_client_get_uri (demux->client);
GST_INFO_OBJECT (demux,
"Updating playlist %s failed, attempt to refresh variant playlist %s",
uri, main_uri);
download =
gst_uri_downloader_fetch_uri (adaptive_demux->downloader,
main_uri, NULL, TRUE, TRUE, TRUE, err);
g_free (main_uri);
if (download == NULL) {
g_free (uri);
return FALSE;
}
buf = gst_fragment_get_buffer (download);
playlist = gst_hls_src_buf_to_utf8_playlist (buf);
gst_buffer_unref (buf);
if (playlist == NULL) {
GST_WARNING_OBJECT (demux,
"Failed to validate variant playlist encoding");
g_free (uri);
g_object_unref (download);
g_set_error (err, GST_STREAM_ERROR, GST_STREAM_ERROR_WRONG_TYPE,
"Couldn't validate playlist encoding");
return FALSE;
}
g_free (uri);
if (download->redirect_permanent && download->redirect_uri) {
uri = download->redirect_uri;
base_uri = NULL;
} else {
uri = download->uri;
base_uri = download->redirect_uri;
}
if (!gst_m3u8_client_update_variant_playlist (demux->client, playlist,
uri, base_uri)) {
GST_WARNING_OBJECT (demux, "Failed to update the variant playlist");
g_object_unref (download);
g_set_error (err, GST_STREAM_ERROR, GST_STREAM_ERROR_FAILED,
"Couldn't update playlist");
return FALSE;
}
g_object_unref (download);
main_checked = TRUE;
goto retry;
}
g_free (uri);
/* Set the base URI of the playlist to the redirect target if any */
GST_M3U8_CLIENT_LOCK (demux->client);
g_free (demux->client->current->uri);
g_free (demux->client->current->base_uri);
if (download->redirect_permanent && download->redirect_uri) {
demux->client->current->uri = g_strdup (download->redirect_uri);
demux->client->current->base_uri = NULL;
} else {
demux->client->current->uri = g_strdup (download->uri);
demux->client->current->base_uri = g_strdup (download->redirect_uri);
}
GST_M3U8_CLIENT_UNLOCK (demux->client);
buf = gst_fragment_get_buffer (download);
playlist = gst_hls_src_buf_to_utf8_playlist (buf);
gst_buffer_unref (buf);
g_object_unref (download);
if (playlist == NULL) {
GST_WARNING_OBJECT (demux, "Couldn't validate playlist encoding");
g_set_error (err, GST_STREAM_ERROR, GST_STREAM_ERROR_WRONG_TYPE,
"Couldn't validate playlist encoding");
return FALSE;
}
updated = gst_m3u8_client_update (demux->client, playlist);
if (!updated) {
GST_WARNING_OBJECT (demux, "Couldn't update playlist");
g_set_error (err, GST_STREAM_ERROR, GST_STREAM_ERROR_FAILED,
"Couldn't update playlist");
return FALSE;
}
/* If it's a live source, do not let the sequence number go beyond
* three fragments before the end of the list */
if (update == FALSE && demux->client->current &&
gst_m3u8_client_is_live (demux->client)) {
gint64 last_sequence, first_sequence;
GST_M3U8_CLIENT_LOCK (demux->client);
last_sequence =
GST_M3U8_MEDIA_FILE (g_list_last (demux->client->current->
files)->data)->sequence;
first_sequence =
GST_M3U8_MEDIA_FILE (demux->client->current->files->data)->sequence;
GST_DEBUG_OBJECT (demux,
"sequence:%" G_GINT64_FORMAT " , first_sequence:%" G_GINT64_FORMAT
" , last_sequence:%" G_GINT64_FORMAT, demux->client->sequence,
first_sequence, last_sequence);
if (demux->client->sequence >= last_sequence - 3) {
//demux->need_segment = TRUE;
/* Make sure we never go below the minimum sequence number */
demux->client->sequence = MAX (first_sequence, last_sequence - 3);
GST_DEBUG_OBJECT (demux,
"Sequence is beyond playlist. Moving back to %" G_GINT64_FORMAT,
demux->client->sequence);
}
GST_M3U8_CLIENT_UNLOCK (demux->client);
} else if (demux->client->current && !gst_m3u8_client_is_live (demux->client)) {
GstClockTime current_pos, target_pos;
guint sequence = 0;
GList *walk;
/* Sequence numbers are not guaranteed to be the same in different
* playlists, so get the correct fragment here based on the current
* position
*/
GST_M3U8_CLIENT_LOCK (demux->client);
/* Valid because hlsdemux only has a single output */
if (GST_ADAPTIVE_DEMUX_CAST (demux)->streams) {
GstAdaptiveDemuxStream *stream =
GST_ADAPTIVE_DEMUX_CAST (demux)->streams->data;
target_pos = stream->segment.position;
} else {
target_pos = 0;
}
if (GST_CLOCK_TIME_IS_VALID (demux->client->sequence_position)) {
target_pos = MAX (target_pos, demux->client->sequence_position);
}
GST_LOG_OBJECT (demux, "Looking for sequence position %"
GST_TIME_FORMAT " in updated playlist", GST_TIME_ARGS (target_pos));
current_pos = 0;
for (walk = demux->client->current->files; walk; walk = walk->next) {
GstM3U8MediaFile *file = walk->data;
sequence = file->sequence;
if (current_pos <= target_pos
&& target_pos < current_pos + file->duration) {
break;
}
current_pos += file->duration;
}
/* End of playlist */
if (!walk)
sequence++;
demux->client->sequence = sequence;
demux->client->sequence_position = current_pos;
GST_M3U8_CLIENT_UNLOCK (demux->client);
}
return updated;
}
static gboolean
gst_hls_demux_cache_fragments (GstHLSDemux * demux)
{
gint i;
/* If this playlist is a variant playlist, select the first one
* and update it */
if (gst_m3u8_client_has_variant_playlist (demux->client)) {
GstM3U8 *child = NULL;
GST_M3U8_CLIENT_LOCK (demux->client);
child = demux->client->main->current_variant->data;
GST_M3U8_CLIENT_UNLOCK (demux->client);
gst_m3u8_client_set_current (demux->client, child);
if (!gst_hls_demux_update_playlist (demux)) {
GST_ERROR_OBJECT (demux, "Could not fetch the child playlist %s",
child->uri);
return FALSE;
}
}
/* If it's a live source, set the sequence number to the end of the list
* and substract the 'fragmets_cache' to start from the last fragment*/
if (gst_m3u8_client_is_live (demux->client)) {
GST_M3U8_CLIENT_LOCK (demux->client);
demux->client->sequence += g_list_length (demux->client->current->files);
if (demux->client->sequence >= demux->fragments_cache)
demux->client->sequence -= demux->fragments_cache;
else
demux->client->sequence = 0;
gst_m3u8_client_get_current_position (demux->client, &demux->position);
GST_M3U8_CLIENT_UNLOCK (demux->client);
} else {
GstClockTime duration = gst_m3u8_client_get_duration (demux->client);
GST_DEBUG_OBJECT (demux, "Sending duration message : %" GST_TIME_FORMAT,
GST_TIME_ARGS (duration));
if (duration != GST_CLOCK_TIME_NONE)
gst_element_post_message (GST_ELEMENT (demux),
gst_message_new_duration (GST_OBJECT (demux),
GST_FORMAT_TIME, duration));
}
/* Cache the first fragments */
for (i = 0; i < demux->fragments_cache; i++) {
gst_element_post_message (GST_ELEMENT (demux),
gst_message_new_buffering (GST_OBJECT (demux),
100 * i / demux->fragments_cache));
g_get_current_time (&demux->next_update);
g_time_val_add (&demux->next_update,
gst_m3u8_client_get_target_duration (demux->client)
/ GST_SECOND * G_USEC_PER_SEC);
if (!gst_hls_demux_get_next_fragment (demux)) {
if (demux->end_of_playlist)
break;
if (!demux->cancelled)
GST_ERROR_OBJECT (demux, "Error caching the first fragments");
return FALSE;
}
/* make sure we stop caching fragments if something cancelled it */
if (demux->cancelled)
return FALSE;
gst_hls_demux_switch_playlist (demux);
}
gst_element_post_message (GST_ELEMENT (demux),
gst_message_new_buffering (GST_OBJECT (demux), 100));
g_get_current_time (&demux->next_update);
demux->need_cache = FALSE;
return TRUE;
}
static gboolean
gst_hls_demux_cache_fragments (GstHLSDemux * demux)
{
gint i;
/* If this playlist is a variant playlist, select the first one
* and update it */
if (gst_m3u8_client_has_variant_playlist (demux->client)) {
GstM3U8 *child = NULL;
if (demux->connection_speed == 0) {
GST_M3U8_CLIENT_LOCK (demux->client);
child = demux->client->main->current_variant->data;
GST_M3U8_CLIENT_UNLOCK (demux->client);
} else {
GList *tmp = gst_m3u8_client_get_playlist_for_bitrate (demux->client,
demux->connection_speed);
child = GST_M3U8 (tmp->data);
}
gst_m3u8_client_set_current (demux->client, child);
if (!gst_hls_demux_update_playlist (demux, FALSE)) {
GST_ERROR_OBJECT (demux, "Could not fetch the child playlist %s",
child->uri);
return FALSE;
}
}
if (!gst_m3u8_client_is_live (demux->client)) {
GstClockTime duration = gst_m3u8_client_get_duration (demux->client);
GST_DEBUG_OBJECT (demux, "Sending duration message : %" GST_TIME_FORMAT,
GST_TIME_ARGS (duration));
if (duration != GST_CLOCK_TIME_NONE)
gst_element_post_message (GST_ELEMENT (demux),
gst_message_new_duration (GST_OBJECT (demux),
GST_FORMAT_TIME, duration));
}
/* Cache the first fragments */
for (i = 0; i < demux->fragments_cache; i++) {
gst_element_post_message (GST_ELEMENT (demux),
gst_message_new_buffering (GST_OBJECT (demux),
100 * i / demux->fragments_cache));
g_get_current_time (&demux->next_update);
if (!gst_hls_demux_get_next_fragment (demux, TRUE)) {
if (demux->end_of_playlist)
break;
if (!demux->cancelled)
GST_ERROR_OBJECT (demux, "Error caching the first fragments");
return FALSE;
}
/* make sure we stop caching fragments if something cancelled it */
if (demux->cancelled)
return FALSE;
gst_hls_demux_switch_playlist (demux);
}
gst_element_post_message (GST_ELEMENT (demux),
gst_message_new_buffering (GST_OBJECT (demux), 100));
g_get_current_time (&demux->next_update);
demux->need_cache = FALSE;
return TRUE;
}
void
gst_hls_demux_updates_loop (GstHLSDemux * demux)
{
/* Loop for the updates. It's started when the first fragments are cached and
* schedules the next update of the playlist (for lives sources) and the next
* update of fragments. When a new fragment is downloaded, it compares the
* download time with the next scheduled update to check if we can or should
* switch to a different bitrate */
/* block until the next scheduled update or the signal to quit this thread */
g_mutex_lock (&demux->updates_timed_lock);
GST_DEBUG_OBJECT (demux, "Started updates task");
while (TRUE) {
/* schedule the next update */
gst_hls_demux_schedule (demux);
/* block until the next scheduled update or the signal to quit this thread */
if (g_cond_timed_wait (GST_TASK_GET_COND (demux->updates_task),
&demux->updates_timed_lock, &demux->next_update)) {
goto quit;
}
/* update the playlist for live sources */
if (gst_m3u8_client_is_live (demux->client)) {
if (!gst_hls_demux_update_playlist (demux, TRUE)) {
demux->client->update_failed_count++;
if (demux->client->update_failed_count < DEFAULT_FAILED_COUNT) {
GST_WARNING_OBJECT (demux, "Could not update the playlist");
continue;
} else {
GST_ELEMENT_ERROR (demux, RESOURCE, NOT_FOUND,
("Could not update the playlist"), (NULL));
goto quit;
}
}
}
/* if it's a live source and the playlist couldn't be updated, there aren't
* more fragments in the playlist, so we just wait for the next schedulled
* update */
if (gst_m3u8_client_is_live (demux->client) &&
demux->client->update_failed_count > 0) {
GST_WARNING_OBJECT (demux,
"The playlist hasn't been updated, failed count is %d",
demux->client->update_failed_count);
continue;
}
/* fetch the next fragment */
if (g_queue_is_empty (demux->queue)) {
if (!gst_hls_demux_get_next_fragment (demux, FALSE)) {
if (!demux->end_of_playlist && !demux->cancelled) {
demux->client->update_failed_count++;
if (demux->client->update_failed_count < DEFAULT_FAILED_COUNT) {
GST_WARNING_OBJECT (demux, "Could not fetch the next fragment");
continue;
} else {
GST_ELEMENT_ERROR (demux, RESOURCE, NOT_FOUND,
("Could not fetch the next fragment"), (NULL));
goto quit;
}
}
} else {
demux->client->update_failed_count = 0;
/* try to switch to another bitrate if needed */
gst_hls_demux_switch_playlist (demux);
}
}
}
quit:
{
GST_DEBUG_OBJECT (demux, "Stopped updates task");
gst_hls_demux_stop (demux);
g_mutex_unlock (&demux->updates_timed_lock);
}
}
static gboolean
gst_hls_demux_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstHLSDemux *demux;
demux = GST_HLS_DEMUX (parent);
switch (event->type) {
case GST_EVENT_SEEK:
{
gdouble rate;
GstFormat format;
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
GList *walk;
GstClockTime position, current_pos, target_pos;
gint current_sequence;
GstM3U8MediaFile *file;
GST_INFO_OBJECT (demux, "Received GST_EVENT_SEEK");
if (gst_m3u8_client_is_live (demux->client)) {
GST_WARNING_OBJECT (demux, "Received seek event for live stream");
return FALSE;
}
gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
&stop_type, &stop);
if (format != GST_FORMAT_TIME)
return FALSE;
GST_DEBUG_OBJECT (demux, "seek event, rate: %f start: %" GST_TIME_FORMAT
" stop: %" GST_TIME_FORMAT, rate, GST_TIME_ARGS (start),
GST_TIME_ARGS (stop));
GST_M3U8_CLIENT_LOCK (demux->client);
file = GST_M3U8_MEDIA_FILE (demux->client->current->files->data);
current_sequence = file->sequence;
current_pos = 0;
target_pos = (GstClockTime) start;
for (walk = demux->client->current->files; walk; walk = walk->next) {
file = walk->data;
current_sequence = file->sequence;
if (current_pos <= target_pos
&& target_pos < current_pos + file->duration) {
break;
}
current_pos += file->duration;
}
GST_M3U8_CLIENT_UNLOCK (demux->client);
if (walk == NULL) {
GST_WARNING_OBJECT (demux, "Could not find seeked fragment");
return FALSE;
}
if (flags & GST_SEEK_FLAG_FLUSH) {
GST_DEBUG_OBJECT (demux, "sending flush start");
gst_pad_push_event (demux->srcpad, gst_event_new_flush_start ());
}
demux->cancelled = TRUE;
gst_task_pause (demux->stream_task);
gst_uri_downloader_cancel (demux->downloader);
gst_task_stop (demux->updates_task);
gst_task_pause (demux->stream_task);
/* wait for streaming to finish */
g_rec_mutex_lock (&demux->stream_lock);
demux->need_cache = TRUE;
while (!g_queue_is_empty (demux->queue)) {
GstFragment *fragment = g_queue_pop_head (demux->queue);
g_object_unref (fragment);
}
g_queue_clear (demux->queue);
GST_M3U8_CLIENT_LOCK (demux->client);
GST_DEBUG_OBJECT (demux, "seeking to sequence %d", current_sequence);
demux->client->sequence = current_sequence;
gst_m3u8_client_get_current_position (demux->client, &position);
demux->position_shift = start - position;
demux->need_segment = TRUE;
GST_M3U8_CLIENT_UNLOCK (demux->client);
if (flags & GST_SEEK_FLAG_FLUSH) {
GST_DEBUG_OBJECT (demux, "sending flush stop");
gst_pad_push_event (demux->srcpad, gst_event_new_flush_stop (TRUE));
}
demux->cancelled = FALSE;
gst_task_start (demux->stream_task);
g_rec_mutex_unlock (&demux->stream_lock);
return TRUE;
}
default:
break;
}
return gst_pad_event_default (pad, parent, event);
}
