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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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676 lines
16 KiB
C
676 lines
16 KiB
C
/* GStreamer
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* Copyright (C) 2010 Marc-Andre Lureau <marcandre.lureau@gmail.com>
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*
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* m3u8.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 <stdlib.h>
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#include <math.h>
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#include <errno.h>
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#include <glib.h>
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#include <gst/glib-compat-private.h>
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#include "gstfragmented.h"
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#include "m3u8.h"
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#define GST_CAT_DEFAULT fragmented_debug
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static GstM3U8 *gst_m3u8_new (void);
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static void gst_m3u8_free (GstM3U8 * m3u8);
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static gboolean gst_m3u8_update (GstM3U8 * m3u8, gchar * data,
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gboolean * updated);
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static GstM3U8MediaFile *gst_m3u8_media_file_new (gchar * uri,
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gchar * title, GstClockTime duration, guint sequence);
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static void gst_m3u8_media_file_free (GstM3U8MediaFile * self);
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static GstM3U8 *
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gst_m3u8_new (void)
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{
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GstM3U8 *m3u8;
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m3u8 = g_new0 (GstM3U8, 1);
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return m3u8;
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}
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static void
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gst_m3u8_set_uri (GstM3U8 * self, gchar * uri)
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{
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g_return_if_fail (self != NULL);
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if (self->uri)
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g_free (self->uri);
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self->uri = uri;
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}
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static void
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gst_m3u8_free (GstM3U8 * self)
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{
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g_return_if_fail (self != NULL);
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g_free (self->uri);
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g_free (self->allowcache);
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g_free (self->codecs);
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g_list_foreach (self->files, (GFunc) gst_m3u8_media_file_free, NULL);
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g_list_free (self->files);
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g_free (self->last_data);
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g_list_foreach (self->lists, (GFunc) gst_m3u8_free, NULL);
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g_list_free (self->lists);
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g_free (self);
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}
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static GstM3U8MediaFile *
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gst_m3u8_media_file_new (gchar * uri, gchar * title, GstClockTime duration,
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guint sequence)
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{
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GstM3U8MediaFile *file;
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file = g_new0 (GstM3U8MediaFile, 1);
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file->uri = uri;
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file->title = title;
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file->duration = duration;
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file->sequence = sequence;
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return file;
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}
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static void
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gst_m3u8_media_file_free (GstM3U8MediaFile * self)
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{
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g_return_if_fail (self != NULL);
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g_free (self->title);
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g_free (self->uri);
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g_free (self);
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}
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static gboolean
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int_from_string (gchar * ptr, gchar ** endptr, gint * val)
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{
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gchar *end;
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glong ret;
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g_return_val_if_fail (ptr != NULL, FALSE);
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g_return_val_if_fail (val != NULL, FALSE);
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errno = 0;
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ret = strtol (ptr, &end, 10);
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if ((errno == ERANGE && (ret == LONG_MAX || ret == LONG_MIN))
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|| (errno != 0 && ret == 0)) {
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GST_WARNING ("%s", g_strerror (errno));
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return FALSE;
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}
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if (ret > G_MAXINT) {
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GST_WARNING ("%s", g_strerror (ERANGE));
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return FALSE;
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}
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if (endptr)
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*endptr = end;
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*val = (gint) ret;
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return end != ptr;
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}
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static gboolean
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double_from_string (gchar * ptr, gchar ** endptr, gdouble * val)
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{
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gchar *end;
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gdouble ret;
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g_return_val_if_fail (ptr != NULL, FALSE);
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g_return_val_if_fail (val != NULL, FALSE);
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errno = 0;
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ret = strtod (ptr, &end);
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if ((errno == ERANGE && (ret == HUGE_VAL || ret == -HUGE_VAL))
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|| (errno != 0 && ret == 0)) {
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GST_WARNING ("%s", g_strerror (errno));
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return FALSE;
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}
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if (!isfinite (ret)) {
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GST_WARNING ("%s", g_strerror (ERANGE));
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return FALSE;
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}
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if (endptr)
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*endptr = end;
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*val = (gint) ret;
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return end != ptr;
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}
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static gboolean
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parse_attributes (gchar ** ptr, gchar ** a, gchar ** v)
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{
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gchar *end, *p;
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g_return_val_if_fail (ptr != NULL, FALSE);
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g_return_val_if_fail (*ptr != NULL, FALSE);
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g_return_val_if_fail (a != NULL, FALSE);
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g_return_val_if_fail (v != NULL, FALSE);
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/* [attribute=value,]* */
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*a = *ptr;
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end = p = g_utf8_strchr (*ptr, -1, ',');
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if (end) {
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do {
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end = g_utf8_next_char (end);
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} while (end && *end == ' ');
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*p = '\0';
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}
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*v = p = g_utf8_strchr (*ptr, -1, '=');
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if (*v) {
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*v = g_utf8_next_char (*v);
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*p = '\0';
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} else {
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GST_WARNING ("missing = after attribute");
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return FALSE;
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}
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*ptr = end;
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return TRUE;
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}
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static gint
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_m3u8_compare_uri (GstM3U8 * a, gchar * uri)
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{
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g_return_val_if_fail (a != NULL, 0);
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g_return_val_if_fail (uri != NULL, 0);
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return g_strcmp0 (a->uri, uri);
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}
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static gint
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gst_m3u8_compare_playlist_by_bitrate (gconstpointer a, gconstpointer b)
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{
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return ((GstM3U8 *) (a))->bandwidth - ((GstM3U8 *) (b))->bandwidth;
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}
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/*
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* @data: a m3u8 playlist text data, taking ownership
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*/
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static gboolean
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gst_m3u8_update (GstM3U8 * self, gchar * data, gboolean * updated)
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{
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gint val;
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GstClockTime duration;
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gchar *title, *end;
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// gboolean discontinuity;
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GstM3U8 *list;
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g_return_val_if_fail (self != NULL, FALSE);
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g_return_val_if_fail (data != NULL, FALSE);
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g_return_val_if_fail (updated != NULL, FALSE);
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*updated = TRUE;
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/* check if the data changed since last update */
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if (self->last_data && g_str_equal (self->last_data, data)) {
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GST_DEBUG ("Playlist is the same as previous one");
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*updated = FALSE;
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g_free (data);
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return TRUE;
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}
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if (!g_str_has_prefix (data, "#EXTM3U")) {
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GST_WARNING ("Data doesn't start with #EXTM3U");
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*updated = FALSE;
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g_free (data);
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return FALSE;
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}
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g_free (self->last_data);
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self->last_data = data;
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if (self->files) {
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g_list_foreach (self->files, (GFunc) gst_m3u8_media_file_free, NULL);
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g_list_free (self->files);
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self->files = NULL;
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}
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list = NULL;
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duration = 0;
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title = NULL;
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data += 7;
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while (TRUE) {
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end = g_utf8_strchr (data, -1, '\n');
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if (end)
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*end = '\0';
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if (data[0] != '#') {
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gchar *r;
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if (duration <= 0 && list == NULL) {
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GST_LOG ("%s: got line without EXTINF or EXTSTREAMINF, dropping", data);
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goto next_line;
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}
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if (!gst_uri_is_valid (data)) {
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gchar *slash;
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if (!self->uri) {
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GST_WARNING ("uri not set, can't build a valid uri");
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goto next_line;
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}
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slash = g_utf8_strrchr (self->uri, -1, '/');
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if (!slash) {
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GST_WARNING ("Can't build a valid uri");
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goto next_line;
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}
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*slash = '\0';
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data = g_strdup_printf ("%s/%s", self->uri, data);
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*slash = '/';
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} else {
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data = g_strdup (data);
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}
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r = g_utf8_strchr (data, -1, '\r');
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if (r)
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*r = '\0';
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if (list != NULL) {
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if (g_list_find_custom (self->lists, data,
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(GCompareFunc) _m3u8_compare_uri)) {
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GST_DEBUG ("Already have a list with this URI");
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gst_m3u8_free (list);
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g_free (data);
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} else {
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gst_m3u8_set_uri (list, data);
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self->lists = g_list_append (self->lists, list);
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}
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list = NULL;
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} else {
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GstM3U8MediaFile *file;
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file =
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gst_m3u8_media_file_new (data, title, duration,
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self->mediasequence++);
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duration = 0;
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title = NULL;
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self->files = g_list_append (self->files, file);
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}
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} else if (g_str_has_prefix (data, "#EXT-X-ENDLIST")) {
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self->endlist = TRUE;
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} else if (g_str_has_prefix (data, "#EXT-X-VERSION:")) {
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if (int_from_string (data + 15, &data, &val))
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self->version = val;
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} else if (g_str_has_prefix (data, "#EXT-X-STREAM-INF:")) {
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gchar *v, *a;
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if (list != NULL) {
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GST_WARNING ("Found a list without a uri..., dropping");
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gst_m3u8_free (list);
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}
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list = gst_m3u8_new ();
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data = data + 18;
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while (data && parse_attributes (&data, &a, &v)) {
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if (g_str_equal (a, "BANDWIDTH")) {
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if (!int_from_string (v, NULL, &list->bandwidth))
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GST_WARNING ("Error while reading BANDWIDTH");
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} else if (g_str_equal (a, "PROGRAM-ID")) {
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if (!int_from_string (v, NULL, &list->program_id))
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GST_WARNING ("Error while reading PROGRAM-ID");
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} else if (g_str_equal (a, "CODECS")) {
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g_free (list->codecs);
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list->codecs = g_strdup (v);
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} else if (g_str_equal (a, "RESOLUTION")) {
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if (!int_from_string (v, &v, &list->width))
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GST_WARNING ("Error while reading RESOLUTION width");
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if (!v || *v != '=') {
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GST_WARNING ("Missing height");
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} else {
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v = g_utf8_next_char (v);
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if (!int_from_string (v, NULL, &list->height))
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GST_WARNING ("Error while reading RESOLUTION height");
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}
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}
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}
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} else if (g_str_has_prefix (data, "#EXT-X-TARGETDURATION:")) {
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if (int_from_string (data + 22, &data, &val))
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self->targetduration = val * GST_SECOND;
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} else if (g_str_has_prefix (data, "#EXT-X-MEDIA-SEQUENCE:")) {
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if (int_from_string (data + 22, &data, &val))
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self->mediasequence = val;
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} else if (g_str_has_prefix (data, "#EXT-X-DISCONTINUITY")) {
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/* discontinuity = TRUE; */
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} else if (g_str_has_prefix (data, "#EXT-X-PROGRAM-DATE-TIME:")) {
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/* <YYYY-MM-DDThh:mm:ssZ> */
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GST_DEBUG ("FIXME parse date");
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} else if (g_str_has_prefix (data, "#EXT-X-ALLOW-CACHE:")) {
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g_free (self->allowcache);
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self->allowcache = g_strdup (data + 19);
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} else if (g_str_has_prefix (data, "#EXTINF:")) {
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gdouble fval;
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if (!double_from_string (data + 8, &data, &fval)) {
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GST_WARNING ("Can't read EXTINF duration");
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goto next_line;
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}
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duration = fval * (gdouble) GST_SECOND;
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if (duration > self->targetduration)
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GST_WARNING ("EXTINF duration > TARGETDURATION");
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if (!data || *data != ',')
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goto next_line;
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data = g_utf8_next_char (data);
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if (data != end) {
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g_free (title);
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title = g_strdup (data);
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}
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} else {
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GST_LOG ("Ignored line: %s", data);
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}
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next_line:
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if (!end)
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break;
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data = g_utf8_next_char (end); /* skip \n */
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}
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/* redorder playlists by bitrate */
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if (self->lists) {
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gchar *top_variant_uri = NULL;
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if (!self->current_variant)
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top_variant_uri = GST_M3U8 (self->lists->data)->uri;
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else
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top_variant_uri = GST_M3U8 (self->current_variant->data)->uri;
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self->lists =
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g_list_sort (self->lists,
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(GCompareFunc) gst_m3u8_compare_playlist_by_bitrate);
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self->current_variant = g_list_find_custom (self->lists, top_variant_uri,
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(GCompareFunc) _m3u8_compare_uri);
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}
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return TRUE;
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}
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GstM3U8Client *
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gst_m3u8_client_new (const gchar * uri)
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{
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GstM3U8Client *client;
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g_return_val_if_fail (uri != NULL, NULL);
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client = g_new0 (GstM3U8Client, 1);
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client->main = gst_m3u8_new ();
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client->current = NULL;
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client->sequence = -1;
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client->update_failed_count = 0;
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client->lock = g_mutex_new ();
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gst_m3u8_set_uri (client->main, g_strdup (uri));
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return client;
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}
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void
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gst_m3u8_client_free (GstM3U8Client * self)
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{
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g_return_if_fail (self != NULL);
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gst_m3u8_free (self->main);
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g_mutex_free (self->lock);
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g_free (self);
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}
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void
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gst_m3u8_client_set_current (GstM3U8Client * self, GstM3U8 * m3u8)
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{
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g_return_if_fail (self != NULL);
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GST_M3U8_CLIENT_LOCK (self);
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if (m3u8 != self->current) {
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self->current = m3u8;
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self->update_failed_count = 0;
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}
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GST_M3U8_CLIENT_UNLOCK (self);
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}
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gboolean
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gst_m3u8_client_update (GstM3U8Client * self, gchar * data)
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{
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GstM3U8 *m3u8;
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gboolean updated = FALSE;
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gboolean ret = FALSE;
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g_return_val_if_fail (self != NULL, FALSE);
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GST_M3U8_CLIENT_LOCK (self);
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m3u8 = self->current ? self->current : self->main;
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if (!gst_m3u8_update (m3u8, data, &updated))
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goto out;
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if (!updated) {
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self->update_failed_count++;
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goto out;
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}
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/* select the first playlist, for now */
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if (!self->current) {
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if (self->main->lists) {
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self->current = self->main->current_variant->data;
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} else {
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self->current = self->main;
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}
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}
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if (m3u8->files && self->sequence == -1) {
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self->sequence =
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GST_M3U8_MEDIA_FILE (g_list_first (m3u8->files)->data)->sequence;
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GST_DEBUG ("Setting first sequence at %d", self->sequence);
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}
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ret = TRUE;
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out:
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GST_M3U8_CLIENT_UNLOCK (self);
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return ret;
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}
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static gboolean
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_find_next (GstM3U8MediaFile * file, GstM3U8Client * client)
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{
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GST_DEBUG ("Found fragment %d", file->sequence);
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if (file->sequence >= client->sequence)
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return FALSE;
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return TRUE;
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}
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void
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gst_m3u8_client_get_current_position (GstM3U8Client * client,
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GstClockTime * timestamp)
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{
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GList *l;
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GList *walk;
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l = g_list_find_custom (client->current->files, client,
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(GCompareFunc) _find_next);
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|
|
*timestamp = 0;
|
|
for (walk = client->current->files; walk; walk = walk->next) {
|
|
if (walk == l)
|
|
break;
|
|
*timestamp += GST_M3U8_MEDIA_FILE (walk->data)->duration;
|
|
}
|
|
}
|
|
|
|
gboolean
|
|
gst_m3u8_client_get_next_fragment (GstM3U8Client * client,
|
|
gboolean * discontinuity, const gchar ** uri, GstClockTime * duration,
|
|
GstClockTime * timestamp)
|
|
{
|
|
GList *l;
|
|
GstM3U8MediaFile *file;
|
|
|
|
g_return_val_if_fail (client != NULL, FALSE);
|
|
g_return_val_if_fail (client->current != NULL, FALSE);
|
|
g_return_val_if_fail (discontinuity != NULL, FALSE);
|
|
|
|
GST_M3U8_CLIENT_LOCK (client);
|
|
GST_DEBUG ("Looking for fragment %d", client->sequence);
|
|
l = g_list_find_custom (client->current->files, client,
|
|
(GCompareFunc) _find_next);
|
|
if (l == NULL) {
|
|
GST_M3U8_CLIENT_UNLOCK (client);
|
|
return FALSE;
|
|
}
|
|
|
|
gst_m3u8_client_get_current_position (client, timestamp);
|
|
|
|
file = GST_M3U8_MEDIA_FILE (l->data);
|
|
|
|
*discontinuity = client->sequence != file->sequence;
|
|
client->sequence = file->sequence + 1;
|
|
|
|
*uri = file->uri;
|
|
*duration = file->duration;
|
|
|
|
GST_M3U8_CLIENT_UNLOCK (client);
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
_sum_duration (GstM3U8MediaFile * self, GstClockTime * duration)
|
|
{
|
|
*duration += self->duration;
|
|
}
|
|
|
|
GstClockTime
|
|
gst_m3u8_client_get_duration (GstM3U8Client * client)
|
|
{
|
|
GstClockTime duration = 0;
|
|
|
|
g_return_val_if_fail (client != NULL, GST_CLOCK_TIME_NONE);
|
|
|
|
GST_M3U8_CLIENT_LOCK (client);
|
|
/* We can only get the duration for on-demand streams */
|
|
if (!client->current->endlist) {
|
|
GST_M3U8_CLIENT_UNLOCK (client);
|
|
return GST_CLOCK_TIME_NONE;
|
|
}
|
|
|
|
g_list_foreach (client->current->files, (GFunc) _sum_duration, &duration);
|
|
GST_M3U8_CLIENT_UNLOCK (client);
|
|
return duration;
|
|
}
|
|
|
|
GstClockTime
|
|
gst_m3u8_client_get_target_duration (GstM3U8Client * client)
|
|
{
|
|
GstClockTime duration = 0;
|
|
|
|
g_return_val_if_fail (client != NULL, GST_CLOCK_TIME_NONE);
|
|
|
|
GST_M3U8_CLIENT_LOCK (client);
|
|
duration = client->current->targetduration;
|
|
GST_M3U8_CLIENT_UNLOCK (client);
|
|
return duration;
|
|
}
|
|
|
|
const gchar *
|
|
gst_m3u8_client_get_uri (GstM3U8Client * client)
|
|
{
|
|
const gchar *uri;
|
|
|
|
g_return_val_if_fail (client != NULL, NULL);
|
|
|
|
GST_M3U8_CLIENT_LOCK (client);
|
|
uri = client->main->uri;
|
|
GST_M3U8_CLIENT_UNLOCK (client);
|
|
return uri;
|
|
}
|
|
|
|
const gchar *
|
|
gst_m3u8_client_get_current_uri (GstM3U8Client * client)
|
|
{
|
|
const gchar *uri;
|
|
|
|
g_return_val_if_fail (client != NULL, NULL);
|
|
|
|
GST_M3U8_CLIENT_LOCK (client);
|
|
uri = client->current->uri;
|
|
GST_M3U8_CLIENT_UNLOCK (client);
|
|
return uri;
|
|
}
|
|
|
|
gboolean
|
|
gst_m3u8_client_has_variant_playlist (GstM3U8Client * client)
|
|
{
|
|
gboolean ret;
|
|
|
|
g_return_val_if_fail (client != NULL, FALSE);
|
|
|
|
GST_M3U8_CLIENT_LOCK (client);
|
|
ret = (client->main->lists != NULL);
|
|
GST_M3U8_CLIENT_UNLOCK (client);
|
|
return ret;
|
|
}
|
|
|
|
gboolean
|
|
gst_m3u8_client_is_live (GstM3U8Client * client)
|
|
{
|
|
gboolean ret;
|
|
|
|
g_return_val_if_fail (client != NULL, FALSE);
|
|
|
|
GST_M3U8_CLIENT_LOCK (client);
|
|
if (!client->current || client->current->endlist)
|
|
ret = FALSE;
|
|
else
|
|
ret = TRUE;
|
|
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;
|
|
}
|