static gboolean
gst_hls_demux_select_bitrate (GstAdaptiveDemuxStream * stream, guint64 bitrate)
{
GstAdaptiveDemux *demux = GST_ADAPTIVE_DEMUX_CAST (stream->demux);
GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (stream->demux);
gboolean changed = FALSE;
GST_M3U8_CLIENT_LOCK (hlsdemux->client);
if (!hlsdemux->client->main->lists) {
GST_M3U8_CLIENT_UNLOCK (hlsdemux->client);
return FALSE;
}
GST_M3U8_CLIENT_UNLOCK (hlsdemux->client);
/* FIXME: Currently several issues have be found when letting bitrate adaptation
* happen using trick modes (such as 'All streams finished without buffers') and
* the adaptive algorithm does not properly behave. */
if (demux->segment.rate != 1.0)
return FALSE;
gst_hls_demux_change_playlist (hlsdemux, bitrate, &changed);
if (changed)
gst_hls_demux_setup_streams (GST_ADAPTIVE_DEMUX_CAST (hlsdemux));
return changed;
}
static GstStateChangeReturn
gst_hls_demux_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstHLSDemux *demux = GST_HLS_DEMUX (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_hls_demux_reset (GST_ADAPTIVE_DEMUX_CAST (demux));
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_hls_demux_reset (GST_ADAPTIVE_DEMUX_CAST (demux));
break;
default:
break;
}
return ret;
}
static void
gst_mss_demux_dispose (GObject * object)
{
gst_mss_demux_reset (GST_ADAPTIVE_DEMUX_CAST (object));
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_mss_demux_init (GstMssDemux * mssdemux)
{
mssdemux->data_queue_max_size = DEFAULT_MAX_QUEUE_SIZE_BUFFERS;
gst_adaptive_demux_set_stream_struct_size (GST_ADAPTIVE_DEMUX_CAST (mssdemux),
sizeof (GstMssDemuxStream));
}
static void
gst_hls_demux_dispose (GObject * obj)
{
GstHLSDemux *demux = GST_HLS_DEMUX (obj);
gst_hls_demux_reset (GST_ADAPTIVE_DEMUX_CAST (demux));
gst_m3u8_client_free (demux->client);
G_OBJECT_CLASS (parent_class)->dispose (obj);
}
static void
gst_hls_demux_finalize (GObject * obj)
{
GstHLSDemux *demux = GST_HLS_DEMUX (obj);
gst_hls_demux_reset (GST_ADAPTIVE_DEMUX_CAST (demux));
g_object_unref (demux->pending_encrypted_data);
gst_m3u8_client_free (demux->client);
G_OBJECT_CLASS (parent_class)->finalize (obj);
}
static guint64
gst_hls_demux_get_bitrate (GstHLSDemux * hlsdemux)
{
GstAdaptiveDemux *demux = GST_ADAPTIVE_DEMUX_CAST (hlsdemux);
/* Valid because hlsdemux only has a single output */
if (demux->streams) {
GstAdaptiveDemuxStream *stream = demux->streams->data;
return stream->current_download_rate;
}
return 0;
}
static void
gst_mss_demux_update_base_url (GstMssDemux * mssdemux)
{
GstAdaptiveDemux *demux = GST_ADAPTIVE_DEMUX_CAST (mssdemux);
gchar *baseurl_end;
g_free (mssdemux->base_url);
mssdemux->base_url =
g_strdup (demux->manifest_base_uri ? demux->manifest_base_uri : demux->
manifest_uri);
baseurl_end = g_strrstr (mssdemux->base_url, "/Manifest");
if (baseurl_end == NULL) {
/* second try */
baseurl_end = g_strrstr (mssdemux->base_url, "/manifest");
}
if (baseurl_end) {
/* set the new end of the string */
baseurl_end[0] = '\0';
} else {
GST_WARNING_OBJECT (mssdemux, "Stream's URI didn't end with /manifest");
}
}
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_change_playlist (GstHLSDemux * demux, guint max_bitrate,
gboolean * changed)
{
GList *previous_variant, *current_variant;
gint old_bandwidth, new_bandwidth;
GstAdaptiveDemux *adaptive_demux = GST_ADAPTIVE_DEMUX_CAST (demux);
GstAdaptiveDemuxStream *stream;
g_return_val_if_fail (adaptive_demux->streams != NULL, FALSE);
stream = adaptive_demux->streams->data;
previous_variant = demux->client->main->current_variant;
current_variant = gst_m3u8_client_get_playlist_for_bitrate (demux->client,
max_bitrate);
GST_M3U8_CLIENT_LOCK (demux->client);
retry_failover_protection:
old_bandwidth = GST_M3U8 (previous_variant->data)->bandwidth;
new_bandwidth = GST_M3U8 (current_variant->data)->bandwidth;
/* Don't do anything else if the playlist is the same */
if (new_bandwidth == old_bandwidth) {
GST_M3U8_CLIENT_UNLOCK (demux->client);
return TRUE;
}
demux->client->main->current_variant = current_variant;
GST_M3U8_CLIENT_UNLOCK (demux->client);
gst_m3u8_client_set_current (demux->client, current_variant->data);
GST_INFO_OBJECT (demux, "Client was on %dbps, max allowed is %dbps, switching"
" to bitrate %dbps", old_bandwidth, max_bitrate, new_bandwidth);
if (gst_hls_demux_update_playlist (demux, TRUE, NULL)) {
gchar *uri;
gchar *main_uri;
uri = gst_m3u8_client_get_current_uri (demux->client);
main_uri = gst_m3u8_client_get_uri (demux->client);
gst_element_post_message (GST_ELEMENT_CAST (demux),
gst_message_new_element (GST_OBJECT_CAST (demux),
gst_structure_new (GST_ADAPTIVE_DEMUX_STATISTICS_MESSAGE_NAME,
"manifest-uri", G_TYPE_STRING,
main_uri, "uri", G_TYPE_STRING,
uri, "bitrate", G_TYPE_INT, new_bandwidth, NULL)));
g_free (uri);
g_free (main_uri);
if (changed)
*changed = TRUE;
stream->discont = TRUE;
} else {
GList *failover = NULL;
GST_INFO_OBJECT (demux, "Unable to update playlist. Switching back");
GST_M3U8_CLIENT_LOCK (demux->client);
failover = g_list_previous (current_variant);
if (failover && new_bandwidth == GST_M3U8 (failover->data)->bandwidth) {
current_variant = failover;
goto retry_failover_protection;
}
demux->client->main->current_variant = previous_variant;
GST_M3U8_CLIENT_UNLOCK (demux->client);
gst_m3u8_client_set_current (demux->client, previous_variant->data);
/* Try a lower bitrate (or stop if we just tried the lowest) */
if (GST_M3U8 (previous_variant->data)->iframe && new_bandwidth ==
GST_M3U8 (g_list_first (demux->client->main->iframe_lists)->data)->
bandwidth)
return FALSE;
else if (!GST_M3U8 (previous_variant->data)->iframe && new_bandwidth ==
GST_M3U8 (g_list_first (demux->client->main->lists)->data)->bandwidth)
return FALSE;
else
return gst_hls_demux_change_playlist (demux, new_bandwidth - 1, changed);
}
/* Force typefinding since we might have changed media type */
demux->do_typefind = TRUE;
return TRUE;
}
static gboolean
gst_mss_demux_setup_streams (GstAdaptiveDemux * demux)
{
GstMssDemux *mssdemux = GST_MSS_DEMUX_CAST (demux);
GSList *streams = gst_mss_manifest_get_streams (mssdemux->manifest);
GSList *iter;
GSList *active_streams = NULL;
if (streams == NULL) {
GST_INFO_OBJECT (mssdemux, "No streams found in the manifest");
GST_ELEMENT_ERROR (mssdemux, STREAM, DEMUX,
(_("This file contains no playable streams.")),
("no streams found at the Manifest"));
return FALSE;
}
GST_INFO_OBJECT (mssdemux, "Activating streams");
for (iter = streams; iter; iter = g_slist_next (iter)) {
GstPad *srcpad = NULL;
GstMssDemuxStream *stream = NULL;
GstMssStream *manifeststream = iter->data;
srcpad = _create_pad (mssdemux, manifeststream);
if (!srcpad) {
continue;
}
stream = (GstMssDemuxStream *)
gst_adaptive_demux_stream_new (GST_ADAPTIVE_DEMUX_CAST (mssdemux),
srcpad);
stream->manifest_stream = manifeststream;
gst_mss_stream_set_active (manifeststream, TRUE);
active_streams = g_slist_prepend (active_streams, stream);
}
GST_INFO_OBJECT (mssdemux, "Changing max bitrate to %u",
demux->connection_speed);
gst_mss_manifest_change_bitrate (mssdemux->manifest, demux->connection_speed);
for (iter = active_streams; iter; iter = g_slist_next (iter)) {
GstMssDemuxStream *stream = iter->data;
GstCaps *caps;
const gchar *lang;
caps = gst_mss_stream_get_caps (stream->manifest_stream);
gst_adaptive_demux_stream_set_caps (GST_ADAPTIVE_DEMUX_STREAM_CAST (stream),
create_mss_caps (stream, caps));
gst_caps_unref (caps);
lang = gst_mss_stream_get_lang (stream->manifest_stream);
if (lang != NULL) {
GstTagList *tags;
tags = gst_tag_list_new (GST_TAG_LANGUAGE_CODE, lang, NULL);
gst_adaptive_demux_stream_set_tags (GST_ADAPTIVE_DEMUX_STREAM_CAST
(stream), tags);
}
}
g_slist_free (active_streams);
return TRUE;
}
