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228 lines
6.4 KiB
C
228 lines
6.4 KiB
C
/* GStreamer
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* Copyright (C) 2011 Andoni Morales Alastruey <ylatuya@gmail.com>
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*
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* gstm3u8playlist.c:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <glib.h>
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#include "gstfragmented.h"
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#include "gstm3u8playlist.h"
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#define GST_CAT_DEFAULT fragmented_debug
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#define M3U8_HEADER_TAG "#EXTM3U\n"
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#define M3U8_VERSION_TAG "#EXT-X-VERSION:%d\n"
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#define M3U8_TARGETDURATION_TAG "#EXT-X-TARGETDURATION:%d\n"
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#define M3U8_MEDIA_SEQUENCE_TAG "#EXT-X-MEDIA-SEQUENCE:%d\n"
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#define M3U8_DISCONTINUITY_TAG "#EXT-X-DISCONTINUITY\n"
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#define M3U8_INT_INF_TAG "#EXTINF:%d,%s\n%s\n"
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#define M3U8_FLOAT_INF_TAG "#EXTINF:%.2f,%s\n%s\n"
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#define M3U8_ENDLIST_TAG "#EXT-X-ENDLIST"
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enum
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{
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GST_M3U8_PLAYLIST_TYPE_EVENT,
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GST_M3U8_PLAYLIST_TYPE_VOD,
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};
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static GstM3U8Entry *
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gst_m3u8_entry_new (const gchar * url, GFile * file, const gchar * title,
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gfloat duration, gboolean discontinuous)
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{
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GstM3U8Entry *entry;
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g_return_val_if_fail (url != NULL, NULL);
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g_return_val_if_fail (title != NULL, NULL);
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entry = g_new0 (GstM3U8Entry, 1);
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entry->url = g_strdup (url);
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entry->title = g_strdup (title);
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entry->duration = duration;
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entry->file = file;
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entry->discontinuous = discontinuous;
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return entry;
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}
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static void
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gst_m3u8_entry_free (GstM3U8Entry * entry)
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{
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g_return_if_fail (entry != NULL);
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g_free (entry->url);
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g_free (entry->title);
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if (entry->file != NULL)
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g_object_unref (entry->file);
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g_free (entry);
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}
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static gchar *
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gst_m3u8_entry_render (GstM3U8Entry * entry, guint version)
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{
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g_return_val_if_fail (entry != NULL, NULL);
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/* FIXME: Ensure the radix is always a '.' and not a ',' when printing
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* floating point number, but for now only use integers*/
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/* if (version < 3) */
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if (TRUE)
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return g_strdup_printf ("%s" M3U8_INT_INF_TAG,
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entry->discontinuous ? M3U8_DISCONTINUITY_TAG : "",
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(gint) (entry->duration / GST_SECOND), entry->title, entry->url);
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return g_strdup_printf ("%s" M3U8_FLOAT_INF_TAG,
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entry->discontinuous ? M3U8_DISCONTINUITY_TAG : "",
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(entry->duration / GST_SECOND), entry->title, entry->url);
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}
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GstM3U8Playlist *
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gst_m3u8_playlist_new (guint version, guint window_size, gboolean allow_cache)
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{
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GstM3U8Playlist *playlist;
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playlist = g_new0 (GstM3U8Playlist, 1);
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playlist->version = version;
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playlist->window_size = window_size;
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playlist->allow_cache = allow_cache;
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playlist->type = GST_M3U8_PLAYLIST_TYPE_EVENT;
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playlist->end_list = FALSE;
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playlist->entries = g_queue_new ();
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return playlist;
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}
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void
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gst_m3u8_playlist_free (GstM3U8Playlist * playlist)
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{
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g_return_if_fail (playlist != NULL);
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g_queue_foreach (playlist->entries, (GFunc) gst_m3u8_entry_free, NULL);
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g_queue_free (playlist->entries);
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g_free (playlist);
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}
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GList *
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gst_m3u8_playlist_add_entry (GstM3U8Playlist * playlist,
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const gchar * url, GFile * file, const gchar * title,
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gfloat duration, guint index, gboolean discontinuous)
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{
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GstM3U8Entry *entry;
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GList *old_files = NULL;
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g_return_val_if_fail (playlist != NULL, FALSE);
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g_return_val_if_fail (url != NULL, FALSE);
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g_return_val_if_fail (title != NULL, FALSE);
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if (playlist->type == GST_M3U8_PLAYLIST_TYPE_VOD)
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return FALSE;
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entry = gst_m3u8_entry_new (url, file, title, duration, discontinuous);
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if (playlist->window_size != -1) {
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/* Delete old entries from the playlist */
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while (playlist->entries->length >= playlist->window_size) {
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GstM3U8Entry *old_entry;
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old_entry = g_queue_pop_head (playlist->entries);
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g_object_ref (old_entry->file);
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old_files = g_list_prepend (old_files, old_entry->file);
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gst_m3u8_entry_free (old_entry);
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}
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}
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playlist->sequence_number = index + 1;
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g_queue_push_tail (playlist->entries, entry);
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return old_files;
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}
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static guint
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gst_m3u8_playlist_target_duration (GstM3U8Playlist * playlist)
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{
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gint i;
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GstM3U8Entry *entry;
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guint64 target_duration = 0;
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for (i = 0; i < playlist->entries->length; i++) {
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entry = (GstM3U8Entry *) g_queue_peek_nth (playlist->entries, i);
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if (entry->duration > target_duration)
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target_duration = entry->duration;
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}
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return (guint) (target_duration / GST_SECOND);
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}
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static void
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render_entry (GstM3U8Entry * entry, GstM3U8Playlist * playlist)
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{
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gchar *entry_str;
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entry_str = gst_m3u8_entry_render (entry, playlist->version);
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g_string_append_printf (playlist->playlist_str, "%s", entry_str);
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g_free (entry_str);
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}
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gchar *
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gst_m3u8_playlist_render (GstM3U8Playlist * playlist)
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{
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gchar *pl;
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g_return_val_if_fail (playlist != NULL, NULL);
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playlist->playlist_str = g_string_new ("");
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/* #EXTM3U */
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g_string_append_printf (playlist->playlist_str, M3U8_HEADER_TAG);
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/* #EXT-X-VERSION */
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// g_string_append_printf (playlist->playlist_str, M3U8_VERSION_TAG,
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// playlist->version);
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/* #EXT-X-MEDIA-SEQUENCE */
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g_string_append_printf (playlist->playlist_str, M3U8_MEDIA_SEQUENCE_TAG,
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playlist->sequence_number - playlist->entries->length);
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/* #EXT-X-TARGETDURATION */
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g_string_append_printf (playlist->playlist_str, M3U8_TARGETDURATION_TAG,
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gst_m3u8_playlist_target_duration (playlist));
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g_string_append_printf (playlist->playlist_str, "\n");
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/* Entries */
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g_queue_foreach (playlist->entries, (GFunc) render_entry, playlist);
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if (playlist->end_list)
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g_string_append_printf (playlist->playlist_str, M3U8_ENDLIST_TAG);
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pl = playlist->playlist_str->str;
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g_string_free (playlist->playlist_str, FALSE);
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return pl;
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}
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void
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gst_m3u8_playlist_clear (GstM3U8Playlist * playlist)
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{
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g_return_if_fail (playlist != NULL);
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g_queue_foreach (playlist->entries, (GFunc) gst_m3u8_entry_free, NULL);
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g_queue_clear (playlist->entries);
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}
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guint
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gst_m3u8_playlist_n_entries (GstM3U8Playlist * playlist)
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{
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g_return_val_if_fail (playlist != NULL, 0);
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return playlist->entries->length;
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}
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