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hls: Add a way to get best playlist for a specific bitrate in M3U8Client

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Make use of it in hlsdemux
This commit is contained in:
Thibault Saunier 2012-05-10 10:10:14 -04:00
parent 594d983ff9
commit a8afa9755e
3 changed files with 33 additions and 20 deletions
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24
gst/hls/gsthlsdemux.c
View file

@ -982,27 +982,12 @@ gst_hls_demux_update_playlist (GstHLSDemux * demux, gboolean update)
static gboolean
gst_hls_demux_change_playlist (GstHLSDemux * demux, guint max_bitrate)
{
GList *list, *previous_variant, *current_variant;
GList *previous_variant, *current_variant;
gint old_bandwidth, new_bandwidth;
GST_M3U8_CLIENT_LOCK (demux->client);
current_variant = demux->client->main->current_variant;
previous_variant = current_variant;
/* Go to the highest possible bandwidth allowed */
while (GST_M3U8 (current_variant->data)->bandwidth < max_bitrate) {
list = g_list_next (current_variant);
if (!list)
break;
current_variant = list;
}
while (GST_M3U8 (current_variant->data)->bandwidth > max_bitrate) {
list = g_list_previous (current_variant);
if (!list)
break;
current_variant = list;
}
previous_variant = demux->client->main->current_variant;
current_variant = gst_m3u8_client_get_playlist_for_bitrate (demux->client,
max_bitrate);
retry_failover_protection:
old_bandwidth = GST_M3U8 (previous_variant->data)->bandwidth;
@ -1010,7 +995,6 @@ retry_failover_protection:
/* Don't do anything else if the playlist is the same */
if (new_bandwidth == old_bandwidth) {
GST_M3U8_CLIENT_UNLOCK (demux->client);
return TRUE;
}

27
gst/hls/m3u8.c
View file

@ -647,3 +647,30 @@ gst_m3u8_client_is_live (GstM3U8Client * client)
GST_M3U8_CLIENT_UNLOCK (client);
return ret;
}
GList *
gst_m3u8_client_get_playlist_for_bitrate (GstM3U8Client * client, guint bitrate)
{
GList *list, *current_variant;
GST_M3U8_CLIENT_LOCK (client);
current_variant = client->main->current_variant;
/* Go to the highest possible bandwidth allowed */
while (GST_M3U8 (current_variant->data)->bandwidth < bitrate) {
list = g_list_next (current_variant);
if (!list)
break;
current_variant = list;
}
while (GST_M3U8 (current_variant->data)->bandwidth > bitrate) {
list = g_list_previous (current_variant);
if (!list)
break;
current_variant = list;
}
GST_M3U8_CLIENT_UNLOCK (client);
return current_variant;
}

2
gst/hls/m3u8.h
View file

@ -92,6 +92,8 @@ const gchar *gst_m3u8_client_get_uri(GstM3U8Client * client);
const gchar *gst_m3u8_client_get_current_uri(GstM3U8Client * client);
gboolean gst_m3u8_client_has_variant_playlist(GstM3U8Client * client);
gboolean gst_m3u8_client_is_live(GstM3U8Client * client);
GList * gst_m3u8_client_get_playlist_for_bitrate (GstM3U8Client * client,
guint bitrate);
G_END_DECLS
#endif /* __M3U8_H__ */