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/* GStreamer
* Copyright (C) 2011 Andoni Morales Alastruey <ylatuya@gmail.com>
*
* gstm3u8playlist.c:
*
* 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.
*/
#include <glib.h>
#include "gstfragmented.h"
#include "gstm3u8playlist.h"
#define GST_CAT_DEFAULT fragmented_debug
#define M3U8_HEADER_TAG "#EXTM3U\n"
#define M3U8_VERSION_TAG "#EXT-X-VERSION:%d\n"
#define M3U8_TARGETDURATION_TAG "#EXT-X-TARGETDURATION:%d\n"
#define M3U8_MEDIA_SEQUENCE_TAG "#EXT-X-MEDIA-SEQUENCE:%d\n"
#define M3U8_DISCONTINUITY_TAG "#EXT-X-DISCONTINUITY\n"
#define M3U8_INT_INF_TAG "#EXTINF:%d,%s\n%s\n"
#define M3U8_FLOAT_INF_TAG "#EXTINF:%.2f,%s\n%s\n"
#define M3U8_ENDLIST_TAG "#EXT-X-ENDLIST"
enum
{
GST_M3U8_PLAYLIST_TYPE_EVENT,
GST_M3U8_PLAYLIST_TYPE_VOD,
};
static GstM3U8Entry *
gst_m3u8_entry_new (const gchar * url, GFile * file, const gchar * title,
gfloat duration, gboolean discontinuous)
{
GstM3U8Entry *entry;
g_return_val_if_fail (url != NULL, NULL);
g_return_val_if_fail (title != NULL, NULL);
entry = g_new0 (GstM3U8Entry, 1);
entry->url = g_strdup (url);
entry->title = g_strdup (title);
entry->duration = duration;
entry->file = file;
entry->discontinuous = discontinuous;
return entry;
}
static void
gst_m3u8_entry_free (GstM3U8Entry * entry)
{
g_return_if_fail (entry != NULL);
g_free (entry->url);
g_free (entry->title);
if (entry->file != NULL)
g_object_unref (entry->file);
g_free (entry);
}
static gchar *
gst_m3u8_entry_render (GstM3U8Entry * entry, guint version)
{
g_return_val_if_fail (entry != NULL, NULL);
/* FIXME: Ensure the radix is always a '.' and not a ',' when printing
* floating point number, but for now only use integers*/
/* if (version < 3) */
if (TRUE)
return g_strdup_printf ("%s" M3U8_INT_INF_TAG,
entry->discontinuous ? M3U8_DISCONTINUITY_TAG : "",
(gint) (entry->duration / GST_SECOND), entry->title, entry->url);
return g_strdup_printf ("%s" M3U8_FLOAT_INF_TAG,
entry->discontinuous ? M3U8_DISCONTINUITY_TAG : "",
(entry->duration / GST_SECOND), entry->title, entry->url);
}
GstM3U8Playlist *
gst_m3u8_playlist_new (guint version, guint window_size, gboolean allow_cache)
{
GstM3U8Playlist *playlist;
playlist = g_new0 (GstM3U8Playlist, 1);
playlist->version = version;
playlist->window_size = window_size;
playlist->allow_cache = allow_cache;
playlist->type = GST_M3U8_PLAYLIST_TYPE_EVENT;
playlist->end_list = FALSE;
playlist->entries = g_queue_new ();
return playlist;
}
void
gst_m3u8_playlist_free (GstM3U8Playlist * playlist)
{
g_return_if_fail (playlist != NULL);
g_queue_foreach (playlist->entries, (GFunc) gst_m3u8_entry_free, NULL);
g_queue_free (playlist->entries);
g_free (playlist);
}
GList *
gst_m3u8_playlist_add_entry (GstM3U8Playlist * playlist,
const gchar * url, GFile * file, const gchar * title,
gfloat duration, guint index, gboolean discontinuous)
{
GstM3U8Entry *entry;
GList *old_files = NULL;
g_return_val_if_fail (playlist != NULL, FALSE);
g_return_val_if_fail (url != NULL, FALSE);
g_return_val_if_fail (title != NULL, FALSE);
if (playlist->type == GST_M3U8_PLAYLIST_TYPE_VOD)
return FALSE;
entry = gst_m3u8_entry_new (url, file, title, duration, discontinuous);
if (playlist->window_size != -1) {
/* Delete old entries from the playlist */
while (playlist->entries->length >= playlist->window_size) {
GstM3U8Entry *old_entry;
old_entry = g_queue_pop_head (playlist->entries);
g_object_ref (old_entry->file);
old_files = g_list_prepend (old_files, old_entry->file);
gst_m3u8_entry_free (old_entry);
}
}
playlist->sequence_number = index + 1;
g_queue_push_tail (playlist->entries, entry);
return old_files;
}
static guint
gst_m3u8_playlist_target_duration (GstM3U8Playlist * playlist)
{
gint i;
GstM3U8Entry *entry;
guint64 target_duration = 0;
for (i = 0; i < playlist->entries->length; i++) {
entry = (GstM3U8Entry *) g_queue_peek_nth (playlist->entries, i);
if (entry->duration > target_duration)
target_duration = entry->duration;
}
return (guint) (target_duration / GST_SECOND);
}
static void
render_entry (GstM3U8Entry * entry, GstM3U8Playlist * playlist)
{
gchar *entry_str;
entry_str = gst_m3u8_entry_render (entry, playlist->version);
g_string_append_printf (playlist->playlist_str, "%s", entry_str);
g_free (entry_str);
}
gchar *
gst_m3u8_playlist_render (GstM3U8Playlist * playlist)
{
gchar *pl;
g_return_val_if_fail (playlist != NULL, NULL);
playlist->playlist_str = g_string_new ("");
/* #EXTM3U */
g_string_append_printf (playlist->playlist_str, M3U8_HEADER_TAG);
/* #EXT-X-VERSION */
// g_string_append_printf (playlist->playlist_str, M3U8_VERSION_TAG,
// playlist->version);
/* #EXT-X-MEDIA-SEQUENCE */
g_string_append_printf (playlist->playlist_str, M3U8_MEDIA_SEQUENCE_TAG,
playlist->sequence_number - playlist->entries->length);
/* #EXT-X-TARGETDURATION */
g_string_append_printf (playlist->playlist_str, M3U8_TARGETDURATION_TAG,
gst_m3u8_playlist_target_duration (playlist));
g_string_append_printf (playlist->playlist_str, "\n");
/* Entries */
g_queue_foreach (playlist->entries, (GFunc) render_entry, playlist);
if (playlist->end_list)
g_string_append_printf (playlist->playlist_str, M3U8_ENDLIST_TAG);
pl = playlist->playlist_str->str;
g_string_free (playlist->playlist_str, FALSE);
return pl;
}
void
gst_m3u8_playlist_clear (GstM3U8Playlist * playlist)
{
g_return_if_fail (playlist != NULL);
g_queue_foreach (playlist->entries, (GFunc) gst_m3u8_entry_free, NULL);
g_queue_clear (playlist->entries);
}
guint
gst_m3u8_playlist_n_entries (GstM3U8Playlist * playlist)
{
g_return_val_if_fail (playlist != NULL, 0);
return playlist->entries->length;
}
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