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coral / imx-gst-plugins-bad / 479b1ef76ba1a2d4c5198806b6c3e2e7dd434ae1 / . / ext / hls / gsthlsdemux.c
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/* GStreamer
* Copyright (C) 2010 Marc-Andre Lureau <marcandre.lureau@gmail.com>
* Copyright (C) 2010 Andoni Morales Alastruey <ylatuya@gmail.com>
* Copyright (C) 2011, Hewlett-Packard Development Company, L.P.
* Author: Youness Alaoui <youness.alaoui@collabora.co.uk>, Collabora Ltd.
* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>, Collabora Ltd.
* Copyright (C) 2014 Sebastian Dröge <sebastian@centricular.com>
* Copyright (C) 2015 Tim-Philipp Müller <tim@centricular.com>
*
* Gsthlsdemux.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.
*/
/**
* SECTION:element-hlsdemux
* @title: hlsdemux
*
* HTTP Live Streaming demuxer element.
*
* ## Example launch line
* |[
* gst-launch-1.0 souphttpsrc location=http://devimages.apple.com/iphone/samples/bipbop/gear4/prog_index.m3u8 ! hlsdemux ! decodebin ! videoconvert ! videoscale ! autovideosink
* ]|
*
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <gst/base/gsttypefindhelper.h>
#include "gsthlsdemux.h"
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src_%u",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-hls"));
GST_DEBUG_CATEGORY (gst_hls_demux_debug);
#define GST_CAT_DEFAULT gst_hls_demux_debug
#define GST_M3U8_CLIENT_LOCK(l) /* FIXME */
#define GST_M3U8_CLIENT_UNLOCK(l) /* FIXME */
/* GObject */
static void gst_hls_demux_finalize (GObject * obj);
/* GstElement */
static GstStateChangeReturn
gst_hls_demux_change_state (GstElement * element, GstStateChange transition);
/* GstHLSDemux */
static gboolean gst_hls_demux_update_playlist (GstHLSDemux * demux,
gboolean update, GError ** err);
static gchar *gst_hls_src_buf_to_utf8_playlist (GstBuffer * buf);
static gboolean gst_hls_demux_change_playlist (GstHLSDemux * demux,
guint max_bitrate, gboolean * changed);
static GstBuffer *gst_hls_demux_decrypt_fragment (GstHLSDemux * demux,
GstHLSDemuxStream * stream, GstBuffer * encrypted_buffer, GError ** err);
static gboolean
gst_hls_demux_stream_decrypt_start (GstHLSDemuxStream * stream,
const guint8 * key_data, const guint8 * iv_data);
static void gst_hls_demux_stream_decrypt_end (GstHLSDemuxStream * stream);
static gboolean gst_hls_demux_is_live (GstAdaptiveDemux * demux);
static GstClockTime gst_hls_demux_get_duration (GstAdaptiveDemux * demux);
static gint64 gst_hls_demux_get_manifest_update_interval (GstAdaptiveDemux *
demux);
static gboolean gst_hls_demux_process_manifest (GstAdaptiveDemux * demux,
GstBuffer * buf);
static GstFlowReturn gst_hls_demux_update_manifest (GstAdaptiveDemux * demux);
static gboolean gst_hls_demux_seek (GstAdaptiveDemux * demux, GstEvent * seek);
static GstFlowReturn gst_hls_demux_stream_seek (GstAdaptiveDemuxStream *
stream, gboolean forward, GstSeekFlags flags, GstClockTime ts,
GstClockTime * final_ts);
static gboolean
gst_hls_demux_start_fragment (GstAdaptiveDemux * demux,
GstAdaptiveDemuxStream * stream);
static GstFlowReturn gst_hls_demux_finish_fragment (GstAdaptiveDemux * demux,
GstAdaptiveDemuxStream * stream);
static GstFlowReturn gst_hls_demux_data_received (GstAdaptiveDemux * demux,
GstAdaptiveDemuxStream * stream, GstBuffer * buffer);
static void gst_hls_demux_stream_free (GstAdaptiveDemuxStream * stream);
static gboolean gst_hls_demux_stream_has_next_fragment (GstAdaptiveDemuxStream *
stream);
static GstFlowReturn gst_hls_demux_advance_fragment (GstAdaptiveDemuxStream *
stream);
static GstFlowReturn gst_hls_demux_update_fragment_info (GstAdaptiveDemuxStream
* stream);
static gboolean gst_hls_demux_select_bitrate (GstAdaptiveDemuxStream * stream,
guint64 bitrate);
static void gst_hls_demux_reset (GstAdaptiveDemux * demux);
static gboolean gst_hls_demux_get_live_seek_range (GstAdaptiveDemux * demux,
gint64 * start, gint64 * stop);
static GstM3U8 *gst_hls_demux_stream_get_m3u8 (GstHLSDemuxStream * hls_stream);
static void gst_hls_demux_set_current_variant (GstHLSDemux * hlsdemux,
GstHLSVariantStream * variant);
#define gst_hls_demux_parent_class parent_class
G_DEFINE_TYPE (GstHLSDemux, gst_hls_demux, GST_TYPE_ADAPTIVE_DEMUX);
static void
gst_hls_demux_finalize (GObject * obj)
{
GstHLSDemux *demux = GST_HLS_DEMUX (obj);
gst_hls_demux_reset (GST_ADAPTIVE_DEMUX_CAST (demux));
g_mutex_clear (&demux->keys_lock);
if (demux->keys) {
g_hash_table_unref (demux->keys);
demux->keys = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (obj);
}
static void
gst_hls_demux_class_init (GstHLSDemuxClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
GstAdaptiveDemuxClass *adaptivedemux_class;
gobject_class = (GObjectClass *) klass;
element_class = (GstElementClass *) klass;
adaptivedemux_class = (GstAdaptiveDemuxClass *) klass;
gobject_class->finalize = gst_hls_demux_finalize;
element_class->change_state = GST_DEBUG_FUNCPTR (gst_hls_demux_change_state);
gst_element_class_add_static_pad_template (element_class, &srctemplate);
gst_element_class_add_static_pad_template (element_class, &sinktemplate);
gst_element_class_set_static_metadata (element_class,
"HLS Demuxer",
"Codec/Demuxer/Adaptive",
"HTTP Live Streaming demuxer",
"Marc-Andre Lureau <marcandre.lureau@gmail.com>\n"
"Andoni Morales Alastruey <ylatuya@gmail.com>");
adaptivedemux_class->is_live = gst_hls_demux_is_live;
adaptivedemux_class->get_live_seek_range = gst_hls_demux_get_live_seek_range;
adaptivedemux_class->get_duration = gst_hls_demux_get_duration;
adaptivedemux_class->get_manifest_update_interval =
gst_hls_demux_get_manifest_update_interval;
adaptivedemux_class->process_manifest = gst_hls_demux_process_manifest;
adaptivedemux_class->update_manifest = gst_hls_demux_update_manifest;
adaptivedemux_class->reset = gst_hls_demux_reset;
adaptivedemux_class->seek = gst_hls_demux_seek;
adaptivedemux_class->stream_seek = gst_hls_demux_stream_seek;
adaptivedemux_class->stream_has_next_fragment =
gst_hls_demux_stream_has_next_fragment;
adaptivedemux_class->stream_advance_fragment = gst_hls_demux_advance_fragment;
adaptivedemux_class->stream_update_fragment_info =
gst_hls_demux_update_fragment_info;
adaptivedemux_class->stream_select_bitrate = gst_hls_demux_select_bitrate;
adaptivedemux_class->stream_free = gst_hls_demux_stream_free;
adaptivedemux_class->start_fragment = gst_hls_demux_start_fragment;
adaptivedemux_class->finish_fragment = gst_hls_demux_finish_fragment;
adaptivedemux_class->data_received = gst_hls_demux_data_received;
GST_DEBUG_CATEGORY_INIT (gst_hls_demux_debug, "hlsdemux", 0,
"hlsdemux element");
}
static void
gst_hls_demux_init (GstHLSDemux * demux)
{
gst_adaptive_demux_set_stream_struct_size (GST_ADAPTIVE_DEMUX_CAST (demux),
sizeof (GstHLSDemuxStream));
demux->keys = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
g_mutex_init (&demux->keys_lock);
}
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));
g_hash_table_remove_all (demux->keys);
break;
default:
break;
}
return ret;
}
static GstPad *
gst_hls_demux_create_pad (GstHLSDemux * hlsdemux)
{
gchar *name;
GstPad *pad;
name = g_strdup_printf ("src_%u", hlsdemux->srcpad_counter++);
pad = gst_pad_new_from_static_template (&srctemplate, name);
g_free (name);
return pad;
}
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_hls_demux_stream_clear_pending_data (GstHLSDemuxStream * hls_stream)
{
if (hls_stream->pending_encrypted_data)
gst_adapter_clear (hls_stream->pending_encrypted_data);
gst_buffer_replace (&hls_stream->pending_decrypted_buffer, NULL);
gst_buffer_replace (&hls_stream->pending_typefind_buffer, NULL);
gst_buffer_replace (&hls_stream->pending_pcr_buffer, NULL);
hls_stream->current_offset = -1;
gst_hls_demux_stream_decrypt_end (hls_stream);
}
static void
gst_hls_demux_clear_all_pending_data (GstHLSDemux * hlsdemux)
{
GstAdaptiveDemux *demux = (GstAdaptiveDemux *) hlsdemux;
GList *walk;
for (walk = demux->streams; walk != NULL; walk = walk->next) {
GstHLSDemuxStream *hls_stream = GST_HLS_DEMUX_STREAM_CAST (walk->data);
gst_hls_demux_stream_clear_pending_data (hls_stream);
}
}
#if 0
static void
gst_hls_demux_set_current (GstHLSDemux * self, GstM3U8 * m3u8)
{
GST_M3U8_CLIENT_LOCK (self);
if (m3u8 != self->current) {
self->current = m3u8;
self->current->duration = GST_CLOCK_TIME_NONE;
self->current->current_file = NULL;
#if 0
// FIXME: this makes no sense after we just set self->current=m3u8 above (tpm)
// also, these values don't necessarily align between different lists
m3u8->current_file_duration = self->current->current_file_duration;
m3u8->sequence = self->current->sequence;
m3u8->sequence_position = self->current->sequence_position;
m3u8->highest_sequence_number = self->current->highest_sequence_number;
m3u8->first_file_start = self->current->first_file_start;
m3u8->last_file_end = self->current->last_file_end;
#endif
}
GST_M3U8_CLIENT_UNLOCK (self);
}
#endif
#define SEEK_UPDATES_PLAY_POSITION(r, start_type, stop_type) \
((r >= 0 && start_type != GST_SEEK_TYPE_NONE) || \
(r < 0 && stop_type != GST_SEEK_TYPE_NONE))
#define IS_SNAP_SEEK(f) (f & (GST_SEEK_FLAG_SNAP_BEFORE | \
GST_SEEK_FLAG_SNAP_AFTER | \
GST_SEEK_FLAG_SNAP_NEAREST | \
GST_SEEK_FLAG_TRICKMODE_KEY_UNITS | \
GST_SEEK_FLAG_KEY_UNIT))
static gboolean
gst_hls_demux_seek (GstAdaptiveDemux * demux, GstEvent * seek)
{
GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (demux);
GstFormat format;
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
gdouble rate, old_rate;
GList *walk;
GstClockTime current_pos, target_pos, final_pos;
guint64 bitrate;
gst_event_parse_seek (seek, &rate, &format, &flags, &start_type, &start,
&stop_type, &stop);
if (!SEEK_UPDATES_PLAY_POSITION (rate, start_type, stop_type)) {
/* nothing to do if we don't have to update the current position */
return TRUE;
}
old_rate = demux->segment.rate;
bitrate = gst_hls_demux_get_bitrate (hlsdemux);
/* Use I-frame variants for trick modes */
if (hlsdemux->master->iframe_variants != NULL
&& rate < -1.0 && old_rate >= -1.0 && old_rate <= 1.0) {
GError *err = NULL;
/* Switch to I-frame variant */
gst_hls_demux_set_current_variant (hlsdemux,
hlsdemux->master->iframe_variants->data);
gst_uri_downloader_reset (demux->downloader);
if (!gst_hls_demux_update_playlist (hlsdemux, FALSE, &err)) {
GST_ELEMENT_ERROR_FROM_ERROR (hlsdemux, "Could not switch playlist", err);
return FALSE;
}
//hlsdemux->discont = TRUE;
gst_hls_demux_change_playlist (hlsdemux, bitrate / ABS (rate), NULL);
} else if (rate > -1.0 && rate <= 1.0 && (old_rate < -1.0 || old_rate > 1.0)) {
GError *err = NULL;
/* Switch to normal variant */
gst_hls_demux_set_current_variant (hlsdemux,
hlsdemux->master->variants->data);
gst_uri_downloader_reset (demux->downloader);
if (!gst_hls_demux_update_playlist (hlsdemux, FALSE, &err)) {
GST_ELEMENT_ERROR_FROM_ERROR (hlsdemux, "Could not switch playlist", err);
return FALSE;
}
//hlsdemux->discont = TRUE;
/* TODO why not continue using the same? that was being used up to now? */
gst_hls_demux_change_playlist (hlsdemux, bitrate, NULL);
}
target_pos = rate < 0 ? stop : start;
final_pos = target_pos;
/* properly cleanup pending decryption status */
if (flags & GST_SEEK_FLAG_FLUSH) {
gst_hls_demux_clear_all_pending_data (hlsdemux);
}
for (walk = demux->streams; walk; walk = g_list_next (walk)) {
GstAdaptiveDemuxStream *stream =
GST_ADAPTIVE_DEMUX_STREAM_CAST (walk->data);
gst_hls_demux_stream_seek (stream, rate >= 0, flags, target_pos,
&current_pos);
/* FIXME: use minimum position always ? */
if (final_pos > current_pos)
final_pos = current_pos;
}
if (IS_SNAP_SEEK (flags)) {
if (rate >= 0)
gst_segment_do_seek (&demux->segment, rate, format, flags, start_type,
final_pos, stop_type, stop, NULL);
else
gst_segment_do_seek (&demux->segment, rate, format, flags, start_type,
start, stop_type, final_pos, NULL);
}
return TRUE;
}
static GstFlowReturn
gst_hls_demux_stream_seek (GstAdaptiveDemuxStream * stream, gboolean forward,
GstSeekFlags flags, GstClockTime ts, GstClockTime * final_ts)
{
GstHLSDemuxStream *hls_stream = GST_HLS_DEMUX_STREAM_CAST (stream);
GList *walk;
GstClockTime current_pos;
gint64 current_sequence;
gboolean snap_after, snap_nearest;
GstM3U8MediaFile *file = NULL;
current_sequence = 0;
current_pos = gst_m3u8_is_live (hls_stream->playlist) ?
hls_stream->playlist->first_file_start : 0;
/* Snap to segment boundary. Improves seek performance on slow machines. */
snap_nearest =
(flags & GST_SEEK_FLAG_SNAP_NEAREST) == GST_SEEK_FLAG_SNAP_NEAREST;
snap_after = ! !(flags & GST_SEEK_FLAG_SNAP_AFTER);
GST_M3U8_CLIENT_LOCK (hlsdemux->client);
/* FIXME: Here we need proper discont handling */
for (walk = hls_stream->playlist->files; walk; walk = walk->next) {
file = walk->data;
current_sequence = file->sequence;
if ((forward && snap_after) || snap_nearest) {
if (current_pos >= ts)
break;
if (snap_nearest && ts - current_pos < file->duration / 2)
break;
} else if (!forward && snap_after) {
/* check if the next fragment is our target, in this case we want to
* start from the previous fragment */
GstClockTime next_pos = current_pos + file->duration;
if (next_pos <= ts && ts < next_pos + file->duration) {
break;
}
} else if (current_pos <= ts && ts < current_pos + file->duration) {
break;
}
current_pos += file->duration;
}
if (walk == NULL) {
GST_DEBUG_OBJECT (stream->pad, "seeking further than track duration");
current_sequence++;
}
GST_DEBUG_OBJECT (stream->pad, "seeking to sequence %u",
(guint) current_sequence);
hls_stream->reset_pts = TRUE;
hls_stream->playlist->sequence = current_sequence;
hls_stream->playlist->current_file = walk;
hls_stream->playlist->sequence_position = current_pos;
GST_M3U8_CLIENT_UNLOCK (hlsdemux->client);
/* Play from the end of the current selected segment */
if (file) {
if (!forward && IS_SNAP_SEEK (flags))
current_pos += file->duration;
}
/* update stream's segment position */
stream->segment.position = current_pos;
if (final_ts)
*final_ts = current_pos;
return GST_FLOW_OK;
}
static GstFlowReturn
gst_hls_demux_update_manifest (GstAdaptiveDemux * demux)
{
GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (demux);
if (!gst_hls_demux_update_playlist (hlsdemux, TRUE, NULL))
return GST_FLOW_ERROR;
return GST_FLOW_OK;
}
static void
create_stream_for_playlist (GstAdaptiveDemux * demux, GstM3U8 * playlist,
gboolean is_primary_playlist, gboolean selected)
{
GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (demux);
GstHLSDemuxStream *hlsdemux_stream;
GstAdaptiveDemuxStream *stream;
if (!selected) {
/* FIXME: Later, create the stream but mark not-selected */
GST_LOG_OBJECT (demux, "Ignoring not-selected stream");
return;
}
stream = gst_adaptive_demux_stream_new (demux,
gst_hls_demux_create_pad (hlsdemux));
hlsdemux_stream = GST_HLS_DEMUX_STREAM_CAST (stream);
hlsdemux_stream->stream_type = GST_HLS_TSREADER_NONE;
hlsdemux_stream->playlist = gst_m3u8_ref (playlist);
hlsdemux_stream->is_primary_playlist = is_primary_playlist;
hlsdemux_stream->do_typefind = TRUE;
hlsdemux_stream->reset_pts = TRUE;
}
static gboolean
gst_hls_demux_setup_streams (GstAdaptiveDemux * demux)
{
GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (demux);
GstHLSVariantStream *playlist = hlsdemux->current_variant;
gint i;
if (playlist == NULL) {
GST_WARNING_OBJECT (demux, "Can't configure streams - no variant selected");
return FALSE;
}
gst_hls_demux_clear_all_pending_data (hlsdemux);
/* 1 output for the main playlist */
create_stream_for_playlist (demux, playlist->m3u8, TRUE, TRUE);
for (i = 0; i < GST_HLS_N_MEDIA_TYPES; ++i) {
GList *mlist = playlist->media[i];
while (mlist != NULL) {
GstHLSMedia *media = mlist->data;
if (media->uri == NULL /* || media->mtype != GST_HLS_MEDIA_TYPE_AUDIO */ ) {
/* No uri means this is a placeholder for a stream
* contained in another mux */
GST_LOG_OBJECT (demux, "Skipping stream %s type %d with no URI",
media->name, media->mtype);
mlist = mlist->next;
continue;
}
GST_LOG_OBJECT (demux, "media of type %d - %s, uri: %s", i,
media->name, media->uri);
create_stream_for_playlist (demux, media->playlist, FALSE,
(media->mtype == GST_HLS_MEDIA_TYPE_VIDEO ||
media->mtype == GST_HLS_MEDIA_TYPE_AUDIO));
mlist = mlist->next;
}
}
return TRUE;
}
static const gchar *
gst_adaptive_demux_get_manifest_ref_uri (GstAdaptiveDemux * d)
{
return d->manifest_base_uri ? d->manifest_base_uri : d->manifest_uri;
}
static void
gst_hls_demux_set_current_variant (GstHLSDemux * hlsdemux,
GstHLSVariantStream * variant)
{
if (hlsdemux->current_variant == variant || variant == NULL)
return;
if (hlsdemux->current_variant != NULL) {
gint i;
//#warning FIXME: Synching fragments across variants
// should be done based on media timestamps, and
// discont-sequence-numbers not sequence numbers.
variant->m3u8->sequence_position =
hlsdemux->current_variant->m3u8->sequence_position;
variant->m3u8->sequence = hlsdemux->current_variant->m3u8->sequence;
GST_DEBUG_OBJECT (hlsdemux,
"Switching Variant. Copying over sequence %" G_GINT64_FORMAT
" and sequence_pos %" GST_TIME_FORMAT, variant->m3u8->sequence,
GST_TIME_ARGS (variant->m3u8->sequence_position));
for (i = 0; i < GST_HLS_N_MEDIA_TYPES; ++i) {
GList *mlist = hlsdemux->current_variant->media[i];
while (mlist != NULL) {
GstHLSMedia *old_media = mlist->data;
GstHLSMedia *new_media =
gst_hls_variant_find_matching_media (variant, old_media);
if (new_media) {
new_media->playlist->sequence = old_media->playlist->sequence;
new_media->playlist->sequence_position =
old_media->playlist->sequence_position;
}
mlist = mlist->next;
}
}
gst_hls_variant_stream_unref (hlsdemux->current_variant);
}
hlsdemux->current_variant = gst_hls_variant_stream_ref (variant);
}
static gboolean
gst_hls_demux_process_manifest (GstAdaptiveDemux * demux, GstBuffer * buf)
{
GstHLSVariantStream *variant;
GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (demux);
gchar *playlist = NULL;
GST_INFO_OBJECT (demux, "Initial playlist location: %s (base uri: %s)",
demux->manifest_uri, demux->manifest_base_uri);
playlist = gst_hls_src_buf_to_utf8_playlist (buf);
if (playlist == NULL) {
GST_WARNING_OBJECT (demux, "Error validating initial playlist");
return FALSE;
}
GST_M3U8_CLIENT_LOCK (self);
hlsdemux->master = gst_hls_master_playlist_new_from_data (playlist,
gst_adaptive_demux_get_manifest_ref_uri (demux));
if (hlsdemux->master == NULL || hlsdemux->master->variants == NULL) {
/* In most cases, this will happen if we set a wrong url in the
* source element and we have received the 404 HTML response instead of
* the playlist */
GST_ELEMENT_ERROR (demux, STREAM, DECODE, ("Invalid playlist."),
("Could not parse playlist. Check if the URL is correct."));
GST_M3U8_CLIENT_UNLOCK (self);
return FALSE;
}
/* select the initial variant stream */
if (demux->connection_speed == 0) {
variant = hlsdemux->master->default_variant;
} else {
variant =
gst_hls_master_playlist_get_variant_for_bitrate (hlsdemux->master,
NULL, demux->connection_speed);
}
if (variant) {
GST_INFO_OBJECT (hlsdemux, "selected %s", variant->name);
gst_hls_demux_set_current_variant (hlsdemux, variant); // FIXME: inline?
}
/* get the selected media playlist (unless the inital list was one already) */
if (!hlsdemux->master->is_simple) {
GError *err = NULL;
if (!gst_hls_demux_update_playlist (hlsdemux, FALSE, &err)) {
GST_ELEMENT_ERROR_FROM_ERROR (demux, "Could not fetch media playlist",
err);
GST_M3U8_CLIENT_UNLOCK (self);
return FALSE;
}
}
GST_M3U8_CLIENT_UNLOCK (self);
return gst_hls_demux_setup_streams (demux);
}
static GstClockTime
gst_hls_demux_get_duration (GstAdaptiveDemux * demux)
{
GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (demux);
GstClockTime duration = GST_CLOCK_TIME_NONE;
if (hlsdemux->current_variant != NULL)
duration = gst_m3u8_get_duration (hlsdemux->current_variant->m3u8);
return duration;
}
static gboolean
gst_hls_demux_is_live (GstAdaptiveDemux * demux)
{
GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (demux);
gboolean is_live = FALSE;
if (hlsdemux->current_variant)
is_live = gst_hls_variant_stream_is_live (hlsdemux->current_variant);
return is_live;
}
static const GstHLSKey *
gst_hls_demux_get_key (GstHLSDemux * demux, const gchar * key_url,
const gchar * referer, gboolean allow_cache)
{
GstFragment *key_fragment;
GstBuffer *key_buffer;
GstHLSKey *key;
GError *err = NULL;
GST_LOG_OBJECT (demux, "Looking up key for key url %s", key_url);
g_mutex_lock (&demux->keys_lock);
key = g_hash_table_lookup (demux->keys, key_url);
if (key != NULL) {
GST_LOG_OBJECT (demux, "Found key for key url %s in key cache", key_url);
goto out;
}
GST_INFO_OBJECT (demux, "Fetching key %s", key_url);
key_fragment =
gst_uri_downloader_fetch_uri (GST_ADAPTIVE_DEMUX (demux)->downloader,
key_url, referer, FALSE, FALSE, allow_cache, &err);
if (key_fragment == NULL) {
GST_WARNING_OBJECT (demux, "Failed to download key to decrypt data: %s",
err ? err->message : "error");
g_clear_error (&err);
goto out;
}
key_buffer = gst_fragment_get_buffer (key_fragment);
key = g_new0 (GstHLSKey, 1);
if (gst_buffer_extract (key_buffer, 0, key->data, 16) < 16)
GST_WARNING_OBJECT (demux, "Download decryption key is too short!");
g_hash_table_insert (demux->keys, g_strdup (key_url), key);
gst_buffer_unref (key_buffer);
g_object_unref (key_fragment);
out:
g_mutex_unlock (&demux->keys_lock);
if (key != NULL)
GST_MEMDUMP_OBJECT (demux, "Key", key->data, 16);
return key;
}
static gboolean
gst_hls_demux_start_fragment (GstAdaptiveDemux * demux,
GstAdaptiveDemuxStream * stream)
{
GstHLSDemuxStream *hls_stream = GST_HLS_DEMUX_STREAM_CAST (stream);
GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (demux);
const GstHLSKey *key;
GstM3U8 *m3u8;
gst_hls_demux_stream_clear_pending_data (hls_stream);
/* Init the timestamp reader for this fragment */
gst_hlsdemux_tsreader_init (&hls_stream->tsreader);
/* Reset the stream type if we already know it */
gst_hlsdemux_tsreader_set_type (&hls_stream->tsreader,
hls_stream->stream_type);
/* If no decryption is needed, there's nothing to be done here */
if (hls_stream->current_key == NULL)
return TRUE;
m3u8 = gst_hls_demux_stream_get_m3u8 (hls_stream);
key = gst_hls_demux_get_key (hlsdemux, hls_stream->current_key,
m3u8->uri, m3u8->allowcache);
if (key == NULL)
goto key_failed;
gst_hls_demux_stream_decrypt_start (hls_stream, key->data,
hls_stream->current_iv);
return TRUE;
key_failed:
{
GST_ELEMENT_ERROR (demux, STREAM, DEMUX,
("Couldn't retrieve key for decryption"), (NULL));
GST_WARNING_OBJECT (demux, "Failed to decrypt data");
return FALSE;
}
}
static GstHLSTSReaderType
caps_to_reader (const GstCaps * caps)
{
const GstStructure *s = gst_caps_get_structure (caps, 0);
if (gst_structure_has_name (s, "video/mpegts"))
return GST_HLS_TSREADER_MPEGTS;
if (gst_structure_has_name (s, "application/x-id3"))
return GST_HLS_TSREADER_ID3;
return GST_HLS_TSREADER_NONE;
}
static GstFlowReturn
gst_hls_demux_handle_buffer (GstAdaptiveDemux * demux,
GstAdaptiveDemuxStream * stream, GstBuffer * buffer, gboolean at_eos)
{
GstHLSDemuxStream *hls_stream = GST_HLS_DEMUX_STREAM_CAST (stream); // FIXME: pass HlsStream into function
GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (demux);
GstClockTime first_pcr, last_pcr;
GstTagList *tags;
if (buffer == NULL)
return GST_FLOW_OK;
if (G_UNLIKELY (hls_stream->do_typefind)) {
GstCaps *caps = NULL;
guint buffer_size;
GstTypeFindProbability prob = GST_TYPE_FIND_NONE;
GstMapInfo info;
if (hls_stream->pending_typefind_buffer)
buffer = gst_buffer_append (hls_stream->pending_typefind_buffer, buffer);
hls_stream->pending_typefind_buffer = NULL;
gst_buffer_map (buffer, &info, GST_MAP_READ);
buffer_size = info.size;
/* Typefind could miss if buffer is too small. In this case we
* will retry later */
if (buffer_size >= (2 * 1024) || at_eos) {
caps =
gst_type_find_helper_for_data (GST_OBJECT_CAST (hlsdemux), info.data,
info.size, &prob);
}
if (G_UNLIKELY (!caps)) {
/* Won't need this mapping any more all paths return inside this if() */
gst_buffer_unmap (buffer, &info);
/* Only fail typefinding if we already a good amount of data
* and we still don't know the type */
if (buffer_size > (2 * 1024 * 1024) || at_eos) {
GST_ELEMENT_ERROR (hlsdemux, STREAM, TYPE_NOT_FOUND,
("Could not determine type of stream"), (NULL));
gst_buffer_unref (buffer);
return GST_FLOW_NOT_NEGOTIATED;
}
hls_stream->pending_typefind_buffer = buffer;
return GST_FLOW_OK;
}
GST_DEBUG_OBJECT (hlsdemux, "Typefind result: %" GST_PTR_FORMAT " prob:%d",
caps, prob);
hls_stream->stream_type = caps_to_reader (caps);
gst_hlsdemux_tsreader_set_type (&hls_stream->tsreader,
hls_stream->stream_type);
gst_adaptive_demux_stream_set_caps (stream, caps);
hls_stream->do_typefind = FALSE;
gst_buffer_unmap (buffer, &info);
}
g_assert (hls_stream->pending_typefind_buffer == NULL);
// Accumulate this buffer
if (hls_stream->pending_pcr_buffer) {
buffer = gst_buffer_append (hls_stream->pending_pcr_buffer, buffer);
hls_stream->pending_pcr_buffer = NULL;
}
if (!gst_hlsdemux_tsreader_find_pcrs (&hls_stream->tsreader, &buffer,
&first_pcr, &last_pcr, &tags)
&& !at_eos) {
// Store this buffer for later
hls_stream->pending_pcr_buffer = buffer;
return GST_FLOW_OK;
}
if (tags) {
gst_adaptive_demux_stream_set_tags (stream, tags);
/* run typefind again on the trimmed buffer */
hls_stream->do_typefind = TRUE;
return gst_hls_demux_handle_buffer (demux, stream, buffer, at_eos);
}
if (buffer) {
buffer = gst_buffer_make_writable (buffer);
GST_BUFFER_OFFSET (buffer) = hls_stream->current_offset;
hls_stream->current_offset += gst_buffer_get_size (buffer);
GST_BUFFER_OFFSET_END (buffer) = hls_stream->current_offset;
return gst_adaptive_demux_stream_push_buffer (stream, buffer);
}
return GST_FLOW_OK;
}
static GstFlowReturn
gst_hls_demux_finish_fragment (GstAdaptiveDemux * demux,
GstAdaptiveDemuxStream * stream)
{
GstHLSDemuxStream *hls_stream = GST_HLS_DEMUX_STREAM_CAST (stream); // FIXME: pass HlsStream into function
GstFlowReturn ret = GST_FLOW_OK;
if (hls_stream->current_key)
gst_hls_demux_stream_decrypt_end (hls_stream);
if (stream->last_ret == GST_FLOW_OK) {
if (hls_stream->pending_decrypted_buffer) {
if (hls_stream->current_key) {
GstMapInfo info;
gssize unpadded_size;
/* Handle pkcs7 unpadding here */
gst_buffer_map (hls_stream->pending_decrypted_buffer, &info,
GST_MAP_READ);
unpadded_size = info.size - info.data[info.size - 1];
gst_buffer_unmap (hls_stream->pending_decrypted_buffer, &info);
gst_buffer_resize (hls_stream->pending_decrypted_buffer, 0,
unpadded_size);
}
ret =
gst_hls_demux_handle_buffer (demux, stream,
hls_stream->pending_decrypted_buffer, TRUE);
hls_stream->pending_decrypted_buffer = NULL;
}
if (ret == GST_FLOW_OK || ret == GST_FLOW_NOT_LINKED) {
if (G_UNLIKELY (hls_stream->pending_typefind_buffer)) {
GstBuffer *buf = hls_stream->pending_typefind_buffer;
hls_stream->pending_typefind_buffer = NULL;
gst_hls_demux_handle_buffer (demux, stream, buf, TRUE);
}
if (hls_stream->pending_pcr_buffer) {
GstBuffer *buf = hls_stream->pending_pcr_buffer;
hls_stream->pending_pcr_buffer = NULL;
ret = gst_hls_demux_handle_buffer (demux, stream, buf, TRUE);
}
GST_LOG_OBJECT (stream,
"Fragment PCRs were %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT,
GST_TIME_ARGS (hls_stream->tsreader.first_pcr),
GST_TIME_ARGS (hls_stream->tsreader.last_pcr));
}
}
gst_hls_demux_stream_clear_pending_data (hls_stream);
if (ret == GST_FLOW_OK || ret == GST_FLOW_NOT_LINKED)
return gst_adaptive_demux_stream_advance_fragment (demux, stream,
stream->fragment.duration);
return ret;
}
static GstFlowReturn
gst_hls_demux_data_received (GstAdaptiveDemux * demux,
GstAdaptiveDemuxStream * stream, GstBuffer * buffer)
{
GstHLSDemuxStream *hls_stream = GST_HLS_DEMUX_STREAM_CAST (stream);
GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (demux);
if (hls_stream->current_offset == -1)
hls_stream->current_offset = 0;
/* Is it encrypted? */
if (hls_stream->current_key) {
GError *err = NULL;
gsize size;
GstBuffer *tmp_buffer;
if (hls_stream->pending_encrypted_data == NULL)
hls_stream->pending_encrypted_data = gst_adapter_new ();
gst_adapter_push (hls_stream->pending_encrypted_data, buffer);
size = gst_adapter_available (hls_stream->pending_encrypted_data);
/* must be a multiple of 16 */
size &= (~0xF);
if (size == 0) {
return GST_FLOW_OK;
}
buffer = gst_adapter_take_buffer (hls_stream->pending_encrypted_data, size);
buffer =
gst_hls_demux_decrypt_fragment (hlsdemux, hls_stream, buffer, &err);
if (buffer == NULL) {
GST_ELEMENT_ERROR (demux, STREAM, DECODE, ("Failed to decrypt buffer"),
("decryption failed %s", err->message));
g_error_free (err);
return GST_FLOW_ERROR;
}
tmp_buffer = hls_stream->pending_decrypted_buffer;
hls_stream->pending_decrypted_buffer = buffer;
buffer = tmp_buffer;
}
return gst_hls_demux_handle_buffer (demux, stream, buffer, FALSE);
}
static void
gst_hls_demux_stream_free (GstAdaptiveDemuxStream * stream)
{
GstHLSDemuxStream *hls_stream = GST_HLS_DEMUX_STREAM_CAST (stream);
if (hls_stream->playlist) {
gst_m3u8_unref (hls_stream->playlist);
hls_stream->playlist = NULL;
}
if (hls_stream->pending_encrypted_data)
g_object_unref (hls_stream->pending_encrypted_data);
gst_buffer_replace (&hls_stream->pending_decrypted_buffer, NULL);
gst_buffer_replace (&hls_stream->pending_typefind_buffer, NULL);
gst_buffer_replace (&hls_stream->pending_pcr_buffer, NULL);
if (hls_stream->current_key) {
g_free (hls_stream->current_key);
hls_stream->current_key = NULL;
}
if (hls_stream->current_iv) {
g_free (hls_stream->current_iv);
hls_stream->current_iv = NULL;
}
gst_hls_demux_stream_decrypt_end (hls_stream);
}
static GstM3U8 *
gst_hls_demux_stream_get_m3u8 (GstHLSDemuxStream * hlsdemux_stream)
{
GstM3U8 *m3u8;
m3u8 = hlsdemux_stream->playlist;
return m3u8;
}
static gboolean
gst_hls_demux_stream_has_next_fragment (GstAdaptiveDemuxStream * stream)
{
gboolean has_next;
GstM3U8 *m3u8;
m3u8 = gst_hls_demux_stream_get_m3u8 (GST_HLS_DEMUX_STREAM_CAST (stream));
has_next = gst_m3u8_has_next_fragment (m3u8, stream->demux->segment.rate > 0);
return has_next;
}
static GstFlowReturn
gst_hls_demux_advance_fragment (GstAdaptiveDemuxStream * stream)
{
GstHLSDemuxStream *hlsdemux_stream = GST_HLS_DEMUX_STREAM_CAST (stream);
GstM3U8 *m3u8;
m3u8 = gst_hls_demux_stream_get_m3u8 (hlsdemux_stream);
gst_m3u8_advance_fragment (m3u8, stream->demux->segment.rate > 0);
hlsdemux_stream->reset_pts = FALSE;
return GST_FLOW_OK;
}
static GstFlowReturn
gst_hls_demux_update_fragment_info (GstAdaptiveDemuxStream * stream)
{
GstHLSDemuxStream *hlsdemux_stream = GST_HLS_DEMUX_STREAM_CAST (stream);
GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (stream->demux);
GstM3U8MediaFile *file;
GstClockTime sequence_pos;
gboolean discont, forward;
GstM3U8 *m3u8;
m3u8 = gst_hls_demux_stream_get_m3u8 (hlsdemux_stream);
forward = (stream->demux->segment.rate > 0);
file = gst_m3u8_get_next_fragment (m3u8, forward, &sequence_pos, &discont);
if (file == NULL) {
GST_INFO_OBJECT (hlsdemux, "This playlist doesn't contain more fragments");
return GST_FLOW_EOS;
}
if (stream->discont)
discont = TRUE;
/* set up our source for download */
if (hlsdemux_stream->reset_pts || discont
|| stream->demux->segment.rate < 0.0) {
stream->fragment.timestamp = sequence_pos;
} else {
stream->fragment.timestamp = GST_CLOCK_TIME_NONE;
}
g_free (hlsdemux_stream->current_key);
hlsdemux_stream->current_key = g_strdup (file->key);
g_free (hlsdemux_stream->current_iv);
hlsdemux_stream->current_iv = g_memdup (file->iv, sizeof (file->iv));
g_free (stream->fragment.uri);
stream->fragment.uri = g_strdup (file->uri);
GST_DEBUG_OBJECT (hlsdemux, "Stream %p URI now %s", stream, file->uri);
stream->fragment.range_start = file->offset;
if (file->size != -1)
stream->fragment.range_end = file->offset + file->size - 1;
else
stream->fragment.range_end = -1;
stream->fragment.duration = file->duration;
if (discont)
stream->discont = TRUE;
gst_m3u8_media_file_unref (file);
return GST_FLOW_OK;
}
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);
GstHLSDemuxStream *hls_stream = GST_HLS_DEMUX_STREAM_CAST (stream);
gboolean changed = FALSE;
GST_M3U8_CLIENT_LOCK (hlsdemux->client);
if (hlsdemux->master == NULL || hlsdemux->master->is_simple) {
GST_M3U8_CLIENT_UNLOCK (hlsdemux->client);
return FALSE;
}
GST_M3U8_CLIENT_UNLOCK (hlsdemux->client);
if (hls_stream->is_primary_playlist == FALSE) {
GST_LOG_OBJECT (hlsdemux,
"Stream %p Not choosing new bitrate - not the primary stream", stream);
return FALSE;
}
gst_hls_demux_change_playlist (hlsdemux, bitrate / MAX (1.0,
ABS (demux->segment.rate)), &changed);
if (changed)
gst_hls_demux_setup_streams (GST_ADAPTIVE_DEMUX_CAST (hlsdemux));
return changed;
}
static void
gst_hls_demux_reset (GstAdaptiveDemux * ademux)
{
GstHLSDemux *demux = GST_HLS_DEMUX_CAST (ademux);
GST_M3U8_CLIENT_LOCK (hlsdemux->client);
if (demux->master) {
gst_hls_master_playlist_unref (demux->master);
demux->master = NULL;
}
if (demux->current_variant != NULL) {
gst_hls_variant_stream_unref (demux->current_variant);
demux->current_variant = NULL;
}
demux->srcpad_counter = 0;
gst_hls_demux_clear_all_pending_data (demux);
GST_M3U8_CLIENT_UNLOCK (hlsdemux->client);
}
static gchar *
gst_hls_src_buf_to_utf8_playlist (GstBuffer * buf)
{
GstMapInfo info;
gchar *playlist;
if (!gst_buffer_map (buf, &info, GST_MAP_READ))
goto map_error;
if (!g_utf8_validate ((gchar *) info.data, info.size, NULL))
goto validate_error;
/* alloc size + 1 to end with a null character */
playlist = g_malloc0 (info.size + 1);
memcpy (playlist, info.data, info.size);
gst_buffer_unmap (buf, &info);
return playlist;
validate_error:
gst_buffer_unmap (buf, &info);
map_error:
return NULL;
}
static gint
gst_hls_demux_find_variant_match (const GstHLSVariantStream * a,
const GstHLSVariantStream * b)
{
if (g_strcmp0 (a->name, b->name) == 0 &&
a->bandwidth == b->bandwidth &&
a->program_id == b->program_id &&
g_strcmp0 (a->codecs, b->codecs) == 0 &&
a->width == b->width &&
a->height == b->height && a->iframe == b->iframe) {
return 0;
}
return 1;
}
/* Update the master playlist, which contains the list of available
* variants */
static gboolean
gst_hls_demux_update_variant_playlist (GstHLSDemux * hlsdemux, gchar * data,
const gchar * uri, const gchar * base_uri)
{
GstHLSMasterPlaylist *new_master, *old;
gboolean ret = FALSE;
GList *l, *unmatched_lists;
GstHLSVariantStream *new_variant;
new_master = gst_hls_master_playlist_new_from_data (data, base_uri ? base_uri : uri); // FIXME: check which uri to use here
if (new_master == NULL)
return ret;
if (new_master->is_simple) {
// FIXME: we should be able to support this though, in the unlikely
// case that it changed?
GST_ERROR
("Cannot update variant playlist: New playlist is not a variant playlist");
gst_hls_master_playlist_unref (new_master);
return FALSE;
}
GST_M3U8_CLIENT_LOCK (self);
if (hlsdemux->master->is_simple) {
GST_ERROR
("Cannot update variant playlist: Current playlist is not a variant playlist");
gst_hls_master_playlist_unref (new_master);
goto out;
}
/* Now see if the variant playlist still has the same lists */
unmatched_lists = g_list_copy (hlsdemux->master->variants);
for (l = new_master->variants; l != NULL; l = l->next) {
GList *match = g_list_find_custom (unmatched_lists, l->data,
(GCompareFunc) gst_hls_demux_find_variant_match);
if (match) {
GstHLSVariantStream *variant = l->data;
GstHLSVariantStream *old = match->data;
unmatched_lists = g_list_delete_link (unmatched_lists, match);
/* FIXME: Deal with losing position due to missing an update */
variant->m3u8->sequence_position = old->m3u8->sequence_position;
variant->m3u8->sequence = old->m3u8->sequence;
}
}
if (unmatched_lists != NULL) {
GST_WARNING ("Unable to match all playlists");
for (l = unmatched_lists; l != NULL; l = l->next) {
if (l->data == hlsdemux->current_variant) {
GST_WARNING ("Unable to match current playlist");
}
}
g_list_free (unmatched_lists);
}
/* Switch out the variant playlist */
old = hlsdemux->master;
// FIXME: check all this and also switch of variants, if anything needs updating
hlsdemux->master = new_master;
if (hlsdemux->current_variant == NULL) {
new_variant = new_master->default_variant;
} else {
/* Find the same variant in the new playlist */
new_variant =
gst_hls_master_playlist_get_matching_variant (new_master,
hlsdemux->current_variant);
}
/* Use the function to set the current variant, as it copies over data */
if (new_variant != NULL)
gst_hls_demux_set_current_variant (hlsdemux, new_variant);
gst_hls_master_playlist_unref (old);
ret = (hlsdemux->current_variant != NULL);
out:
GST_M3U8_CLIENT_UNLOCK (self);
return ret;
}
static gboolean
gst_hls_demux_update_rendition_manifest (GstHLSDemux * demux,
GstHLSMedia * media, GError ** err)
{
GstAdaptiveDemux *adaptive_demux = GST_ADAPTIVE_DEMUX (demux);
GstFragment *download;
GstBuffer *buf;
gchar *playlist;
const gchar *main_uri;
GstM3U8 *m3u8;
gchar *uri = media->uri;
main_uri = gst_adaptive_demux_get_manifest_ref_uri (adaptive_demux);
download =
gst_uri_downloader_fetch_uri (adaptive_demux->downloader, uri, main_uri,
TRUE, TRUE, TRUE, err);
if (download == NULL)
return FALSE;
m3u8 = media->playlist;
/* Set the base URI of the playlist to the redirect target if any */
if (download->redirect_permanent && download->redirect_uri) {
gst_m3u8_set_uri (m3u8, download->redirect_uri, NULL, media->name);
} else {
gst_m3u8_set_uri (m3u8, download->uri, download->redirect_uri, media->name);
}
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;
}
if (!gst_m3u8_update (m3u8, playlist)) {
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;
}
return TRUE;
}
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;
const gchar *main_uri;
GstM3U8 *m3u8;
gchar *uri;
gint i;
retry:
uri = gst_m3u8_get_uri (demux->current_variant->m3u8);
main_uri = gst_adaptive_demux_get_manifest_ref_uri (adaptive_demux);
download =
gst_uri_downloader_fetch_uri (adaptive_demux->downloader, uri, main_uri,
TRUE, TRUE, TRUE, err);
if (download == NULL) {
gchar *base_uri;
if (!update || main_checked || demux->master->is_simple) {
g_free (uri);
return FALSE;
}
g_clear_error (err);
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);
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_hls_demux_update_variant_playlist (demux, 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);
m3u8 = demux->current_variant->m3u8;
/* Set the base URI of the playlist to the redirect target if any */
if (download->redirect_permanent && download->redirect_uri) {
gst_m3u8_set_uri (m3u8, download->redirect_uri, NULL,
demux->current_variant->name);
} else {
gst_m3u8_set_uri (m3u8, download->uri, download->redirect_uri,
demux->current_variant->name);
}
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;
}
if (!gst_m3u8_update (m3u8, playlist)) {
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;
}
for (i = 0; i < GST_HLS_N_MEDIA_TYPES; ++i) {
GList *mlist = demux->current_variant->media[i];
while (mlist != NULL) {
GstHLSMedia *media = mlist->data;
if (media->uri == NULL) {
/* No uri means this is a placeholder for a stream
* contained in another mux */
mlist = mlist->next;
continue;
}
GST_LOG_OBJECT (demux,
"Updating playlist for media of type %d - %s, uri: %s", i,
media->name, media->uri);
if (!gst_hls_demux_update_rendition_manifest (demux, media, err))
return FALSE;
mlist = mlist->next;
}
}
/* 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 && gst_m3u8_is_live (m3u8)) {
gint64 last_sequence, first_sequence;
GST_M3U8_CLIENT_LOCK (demux->client);
last_sequence =
GST_M3U8_MEDIA_FILE (g_list_last (m3u8->files)->data)->sequence;
first_sequence =
GST_M3U8_MEDIA_FILE (g_list_first (m3u8->files)->data)->sequence;
GST_DEBUG_OBJECT (demux,
"sequence:%" G_GINT64_FORMAT " , first_sequence:%" G_GINT64_FORMAT
" , last_sequence:%" G_GINT64_FORMAT, m3u8->sequence,
first_sequence, last_sequence);
if (m3u8->sequence > last_sequence - 3) {
//demux->need_segment = TRUE;
/* Make sure we never go below the minimum sequence number */
m3u8->sequence = MAX (first_sequence, last_sequence - 3);
GST_DEBUG_OBJECT (demux,
"Sequence is beyond playlist. Moving back to %" G_GINT64_FORMAT,
m3u8->sequence);
}
GST_M3U8_CLIENT_UNLOCK (demux->client);
} else if (!gst_m3u8_is_live (m3u8)) {
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 (m3u8->sequence_position)) {
target_pos = MAX (target_pos, m3u8->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 = m3u8->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++;
m3u8->sequence = sequence;
m3u8->sequence_position = current_pos;
GST_M3U8_CLIENT_UNLOCK (demux->client);
}
return TRUE;
}
static gboolean
gst_hls_demux_change_playlist (GstHLSDemux * demux, guint max_bitrate,
gboolean * changed)
{
GstHLSVariantStream *lowest_variant, *lowest_ivariant;
GstHLSVariantStream *previous_variant, *new_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->current_variant;
new_variant =
gst_hls_master_playlist_get_variant_for_bitrate (demux->master,
demux->current_variant, max_bitrate);
GST_M3U8_CLIENT_LOCK (demux->client);
retry_failover_protection:
old_bandwidth = previous_variant->bandwidth;
new_bandwidth = new_variant->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;
}
GST_M3U8_CLIENT_UNLOCK (demux->client);
gst_hls_demux_set_current_variant (demux, new_variant);
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)) {
const gchar *main_uri;
gchar *uri;
uri = gst_m3u8_get_uri (new_variant->m3u8);
main_uri = gst_adaptive_demux_get_manifest_ref_uri (adaptive_demux);
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);
if (changed)
*changed = TRUE;
stream->discont = TRUE;
} else {
GstHLSVariantStream *failover_variant = NULL;
GList *failover;
GST_INFO_OBJECT (demux, "Unable to update playlist. Switching back");
GST_M3U8_CLIENT_LOCK (demux->client);
/* we find variants by bitrate by going from highest to lowest, so it's
* possible that there's another variant with the same bitrate before the
* one selected which we can use as failover */
failover = g_list_find (demux->master->variants, new_variant);
if (failover != NULL)
failover = failover->prev;
if (failover != NULL)
failover_variant = failover->data;
if (failover_variant && new_bandwidth == failover_variant->bandwidth) {
new_variant = failover_variant;
goto retry_failover_protection;
}
GST_M3U8_CLIENT_UNLOCK (demux->client);
gst_hls_demux_set_current_variant (demux, previous_variant);
/* Try a lower bitrate (or stop if we just tried the lowest) */
if (previous_variant->iframe) {
lowest_ivariant = demux->master->iframe_variants->data;
if (new_bandwidth == lowest_ivariant->bandwidth)
return FALSE;
} else {
lowest_variant = demux->master->variants->data;
if (new_bandwidth == lowest_variant->bandwidth)
return FALSE;
}
return gst_hls_demux_change_playlist (demux, new_bandwidth - 1, changed);
}
return TRUE;
}
#if defined(HAVE_OPENSSL)
static gboolean
gst_hls_demux_stream_decrypt_start (GstHLSDemuxStream * stream,
const guint8 * key_data, const guint8 * iv_data)
{
EVP_CIPHER_CTX *ctx;
#if OPENSSL_VERSION_NUMBER < 0x10100000L
EVP_CIPHER_CTX_init (&stream->aes_ctx);
ctx = &stream->aes_ctx;
#else
stream->aes_ctx = EVP_CIPHER_CTX_new ();
ctx = stream->aes_ctx;
#endif
if (!EVP_DecryptInit_ex (ctx, EVP_aes_128_cbc (), NULL, key_data, iv_data))
return FALSE;
EVP_CIPHER_CTX_set_padding (ctx, 0);
return TRUE;
}
static gboolean
decrypt_fragment (GstHLSDemuxStream * stream, gsize length,
const guint8 * encrypted_data, guint8 * decrypted_data)
{
int len, flen = 0;
EVP_CIPHER_CTX *ctx;
#if OPENSSL_VERSION_NUMBER < 0x10100000L
ctx = &stream->aes_ctx;
#else
ctx = stream->aes_ctx;
#endif
if (G_UNLIKELY (length > G_MAXINT || length % 16 != 0))
return FALSE;
len = (int) length;
if (!EVP_DecryptUpdate (ctx, decrypted_data, &len, encrypted_data, len))
return FALSE;
EVP_DecryptFinal_ex (ctx, decrypted_data + len, &flen);
g_return_val_if_fail (len + flen == length, FALSE);
return TRUE;
}
static void
gst_hls_demux_stream_decrypt_end (GstHLSDemuxStream * stream)
{
#if OPENSSL_VERSION_NUMBER < 0x10100000L
EVP_CIPHER_CTX_cleanup (&stream->aes_ctx);
#else
EVP_CIPHER_CTX_free (stream->aes_ctx);
stream->aes_ctx = NULL;
#endif
}
#elif defined(HAVE_NETTLE)
static gboolean
gst_hls_demux_stream_decrypt_start (GstHLSDemuxStream * stream,
const guint8 * key_data, const guint8 * iv_data)
{
aes_set_decrypt_key (&stream->aes_ctx.ctx, 16, key_data);
CBC_SET_IV (&stream->aes_ctx, iv_data);
return TRUE;
}
static gboolean
decrypt_fragment (GstHLSDemuxStream * stream, gsize length,
const guint8 * encrypted_data, guint8 * decrypted_data)
{
if (length % 16 != 0)
return FALSE;
CBC_DECRYPT (&stream->aes_ctx, aes_decrypt, length, decrypted_data,
encrypted_data);
return TRUE;
}
static void
gst_hls_demux_stream_decrypt_end (GstHLSDemuxStream * stream)
{
/* NOP */
}
#else
static gboolean
gst_hls_demux_stream_decrypt_start (GstHLSDemuxStream * stream,
const guint8 * key_data, const guint8 * iv_data)
{
gcry_error_t err = 0;
gboolean ret = FALSE;
err =
gcry_cipher_open (&stream->aes_ctx, GCRY_CIPHER_AES128,
GCRY_CIPHER_MODE_CBC, 0);
if (err)
goto out;
err = gcry_cipher_setkey (stream->aes_ctx, key_data, 16);
if (err)
goto out;
err = gcry_cipher_setiv (stream->aes_ctx, iv_data, 16);
if (!err)
ret = TRUE;
out:
if (!ret)
if (stream->aes_ctx)
gcry_cipher_close (stream->aes_ctx);
return ret;
}
static gboolean
decrypt_fragment (GstHLSDemuxStream * stream, gsize length,
const guint8 * encrypted_data, guint8 * decrypted_data)
{
gcry_error_t err = 0;
err = gcry_cipher_decrypt (stream->aes_ctx, decrypted_data, length,
encrypted_data, length);
return err == 0;
}
static void
gst_hls_demux_stream_decrypt_end (GstHLSDemuxStream * stream)
{
if (stream->aes_ctx) {
gcry_cipher_close (stream->aes_ctx);
stream->aes_ctx = NULL;
}
}
#endif
static GstBuffer *
gst_hls_demux_decrypt_fragment (GstHLSDemux * demux, GstHLSDemuxStream * stream,
GstBuffer * encrypted_buffer, GError ** err)
{
GstBuffer *decrypted_buffer = NULL;
GstMapInfo encrypted_info, decrypted_info;
decrypted_buffer =
gst_buffer_new_allocate (NULL, gst_buffer_get_size (encrypted_buffer),
NULL);
gst_buffer_map (encrypted_buffer, &encrypted_info, GST_MAP_READ);
gst_buffer_map (decrypted_buffer, &decrypted_info, GST_MAP_WRITE);
if (!decrypt_fragment (stream, encrypted_info.size,
encrypted_info.data, decrypted_info.data))
goto decrypt_error;
gst_buffer_unmap (decrypted_buffer, &decrypted_info);
gst_buffer_unmap (encrypted_buffer, &encrypted_info);
gst_buffer_unref (encrypted_buffer);
return decrypted_buffer;
decrypt_error:
GST_ERROR_OBJECT (demux, "Failed to decrypt fragment");
g_set_error (err, GST_STREAM_ERROR, GST_STREAM_ERROR_DECRYPT,
"Failed to decrypt fragment");
gst_buffer_unmap (decrypted_buffer, &decrypted_info);
gst_buffer_unmap (encrypted_buffer, &encrypted_info);
gst_buffer_unref (encrypted_buffer);
gst_buffer_unref (decrypted_buffer);
return NULL;
}
static gint64
gst_hls_demux_get_manifest_update_interval (GstAdaptiveDemux * demux)
{
GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (demux);
GstClockTime target_duration;
if (hlsdemux->current_variant) {
target_duration =
gst_m3u8_get_target_duration (hlsdemux->current_variant->m3u8);
} else {
target_duration = 5 * GST_SECOND;
}
return gst_util_uint64_scale (target_duration, G_USEC_PER_SEC, GST_SECOND);
}
static gboolean
gst_hls_demux_get_live_seek_range (GstAdaptiveDemux * demux, gint64 * start,
gint64 * stop)
{
GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (demux);
gboolean ret = FALSE;
if (hlsdemux->current_variant) {
ret =
gst_m3u8_get_seek_range (hlsdemux->current_variant->m3u8, start, stop);
}
return ret;
}