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gstreamer/subprojects/gst-plugins-good/ext/adaptivedemux2/hls/m3u8.c
Edward Hervey 33db765f45 adaptivedemux2: Improve minimum buffering threshold 
Previously the minimum buffering threshold was hardcoded to a specific
value (10s). This is suboptimal this an actual value will depend on the actual
stream being played.

This commit sets the low watermark threshold in time to 0, which is an automatic
mode. Subclasses can provide a stream `recommended_buffering_threshold` when
update_stream_info() is called.

Currently implemented for HLS, where we recommended 1.5 average segment
duration. This will result in buffering being at 100% when the 2nd segment has
been downloaded (minus a bit already being consumed downstream)

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3240>
2022-10-31 16:16:50 +01:00

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/* GStreamer
* Copyright (C) 2010 Marc-Andre Lureau <marcandre.lureau@gmail.com>
* Copyright (C) 2015 Tim-Philipp Müller <tim@centricular.com>
*
* Copyright (C) 2021-2022 Centricular Ltd
* Author: Edward Hervey <edward@centricular.com>
* Author: Jan Schmidt <jan@centricular.com>
*
* m3u8.c:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <stdlib.h>
#include <math.h>
#include <errno.h>
#include <glib.h>
#include <gmodule.h>
#include <string.h>
#include <gst/pbutils/pbutils.h>
#include "m3u8.h"
#include "gstadaptivedemux.h"
#include "gsthlselements.h"
#define GST_CAT_DEFAULT hls2_debug
static void gst_m3u8_init_file_unref (GstM3U8InitFile * self);
static gchar *uri_join (const gchar * uri, const gchar * path);
GstHLSMediaPlaylist *
gst_hls_media_playlist_ref (GstHLSMediaPlaylist * m3u8)
{
g_assert (m3u8 != NULL && m3u8->ref_count > 0);
g_atomic_int_add (&m3u8->ref_count, 1);
return m3u8;
}
void
gst_hls_media_playlist_unref (GstHLSMediaPlaylist * self)
{
g_return_if_fail (self != NULL && self->ref_count > 0);
if (g_atomic_int_dec_and_test (&self->ref_count)) {
g_free (self->uri);
g_free (self->base_uri);
g_ptr_array_free (self->segments, TRUE);
g_free (self->last_data);
g_mutex_clear (&self->lock);
g_free (self);
}
}
static GstM3U8MediaSegment *
gst_m3u8_media_segment_new (gchar * uri, gchar * title, GstClockTime duration,
gint64 sequence, gint64 discont_sequence)
{
GstM3U8MediaSegment *file;
file = g_new0 (GstM3U8MediaSegment, 1);
file->uri = uri;
file->title = title;
file->duration = duration;
file->sequence = sequence;
file->discont_sequence = discont_sequence;
file->ref_count = 1;
file->stream_time = GST_CLOCK_STIME_NONE;
return file;
}
GstM3U8MediaSegment *
gst_m3u8_media_segment_ref (GstM3U8MediaSegment * mfile)
{
g_assert (mfile != NULL && mfile->ref_count > 0);
g_atomic_int_add (&mfile->ref_count, 1);
return mfile;
}
void
gst_m3u8_media_segment_unref (GstM3U8MediaSegment * self)
{
g_return_if_fail (self != NULL && self->ref_count > 0);
if (g_atomic_int_dec_and_test (&self->ref_count)) {
if (self->init_file)
gst_m3u8_init_file_unref (self->init_file);
g_free (self->title);
g_free (self->uri);
g_free (self->key);
if (self->datetime)
g_date_time_unref (self->datetime);
g_free (self);
}
}
static GstM3U8InitFile *
gst_m3u8_init_file_new (gchar * uri)
{
GstM3U8InitFile *file;
file = g_new0 (GstM3U8InitFile, 1);
file->uri = uri;
file->ref_count = 1;
return file;
}
static GstM3U8InitFile *
gst_m3u8_init_file_ref (GstM3U8InitFile * ifile)
{
g_assert (ifile != NULL && ifile->ref_count > 0);
g_atomic_int_add (&ifile->ref_count, 1);
return ifile;
}
static void
gst_m3u8_init_file_unref (GstM3U8InitFile * self)
{
g_return_if_fail (self != NULL && self->ref_count > 0);
if (g_atomic_int_dec_and_test (&self->ref_count)) {
g_free (self->uri);
g_free (self);
}
}
static gboolean
int_from_string (gchar * ptr, gchar ** endptr, gint * val)
{
gchar *end;
gint64 ret;
g_return_val_if_fail (ptr != NULL, FALSE);
g_return_val_if_fail (val != NULL, FALSE);
errno = 0;
ret = g_ascii_strtoll (ptr, &end, 10);
if ((errno == ERANGE && (ret == G_MAXINT64 || ret == G_MININT64))
|| (errno != 0 && ret == 0)) {
GST_WARNING ("%s", g_strerror (errno));
return FALSE;
}
if (ret > G_MAXINT || ret < G_MININT) {
GST_WARNING ("%s", g_strerror (ERANGE));
return FALSE;
}
if (endptr)
*endptr = end;
*val = (gint) ret;
return end != ptr;
}
static gboolean
int64_from_string (gchar * ptr, gchar ** endptr, gint64 * val)
{
gchar *end;
gint64 ret;
g_return_val_if_fail (ptr != NULL, FALSE);
g_return_val_if_fail (val != NULL, FALSE);
errno = 0;
ret = g_ascii_strtoll (ptr, &end, 10);
if ((errno == ERANGE && (ret == G_MAXINT64 || ret == G_MININT64))
|| (errno != 0 && ret == 0)) {
GST_WARNING ("%s", g_strerror (errno));
return FALSE;
}
if (endptr)
*endptr = end;
*val = ret;
return end != ptr;
}
static gboolean
double_from_string (gchar * ptr, gchar ** endptr, gdouble * val)
{
gchar *end;
gdouble ret;
g_return_val_if_fail (ptr != NULL, FALSE);
g_return_val_if_fail (val != NULL, FALSE);
errno = 0;
ret = g_ascii_strtod (ptr, &end);
if ((errno == ERANGE && (ret == HUGE_VAL || ret == -HUGE_VAL))
|| (errno != 0 && ret == 0)) {
GST_WARNING ("%s", g_strerror (errno));
return FALSE;
}
if (!isfinite (ret)) {
GST_WARNING ("%s", g_strerror (ERANGE));
return FALSE;
}
if (endptr)
*endptr = end;
*val = (gdouble) ret;
return end != ptr;
}
static gboolean
parse_attributes (gchar ** ptr, gchar ** a, gchar ** v)
{
gchar *end = NULL, *p, *ve;
g_return_val_if_fail (ptr != NULL, FALSE);
g_return_val_if_fail (*ptr != NULL, FALSE);
g_return_val_if_fail (a != NULL, FALSE);
g_return_val_if_fail (v != NULL, FALSE);
/* [attribute=value,]* */
*a = *ptr;
end = p = g_utf8_strchr (*ptr, -1, ',');
if (end) {
gchar *q = g_utf8_strchr (*ptr, -1, '"');
if (q && q < end) {
/* special case, such as CODECS="avc1.77.30, mp4a.40.2" */
q = g_utf8_next_char (q);
if (q) {
q = g_utf8_strchr (q, -1, '"');
}
if (q) {
end = p = g_utf8_strchr (q, -1, ',');
}
}
}
if (end) {
do {
end = g_utf8_next_char (end);
} while (end && *end == ' ');
*p = '\0';
}
*v = p = g_utf8_strchr (*ptr, -1, '=');
if (*v) {
*p = '\0';
*v = g_utf8_next_char (*v);
if (**v == '"') {
ve = g_utf8_next_char (*v);
if (ve) {
ve = g_utf8_strchr (ve, -1, '"');
}
if (ve) {
*v = g_utf8_next_char (*v);
*ve = '\0';
} else {
GST_WARNING ("Cannot remove quotation marks from %s", *a);
}
}
} else {
GST_WARNING ("missing = after attribute");
return FALSE;
}
*ptr = end;
return TRUE;
}
GstHLSMediaPlaylist *
gst_hls_media_playlist_new (const gchar * uri, const gchar * base_uri)
{
GstHLSMediaPlaylist *m3u8;
m3u8 = g_new0 (GstHLSMediaPlaylist, 1);
m3u8->uri = g_strdup (uri);
m3u8->base_uri = g_strdup (base_uri);
m3u8->version = 1;
m3u8->type = GST_HLS_PLAYLIST_TYPE_UNDEFINED;
m3u8->targetduration = GST_CLOCK_TIME_NONE;
m3u8->media_sequence = 0;
m3u8->discont_sequence = 0;
m3u8->endlist = FALSE;
m3u8->i_frame = FALSE;
m3u8->allowcache = TRUE;
m3u8->ext_x_key_present = FALSE;
m3u8->ext_x_pdt_present = FALSE;
m3u8->segments =
g_ptr_array_new_full (16, (GDestroyNotify) gst_m3u8_media_segment_unref);
m3u8->duration = 0;
g_mutex_init (&m3u8->lock);
m3u8->ref_count = 1;
return m3u8;
}
void
gst_hls_media_playlist_dump (GstHLSMediaPlaylist * self)
{
#ifndef GST_DISABLE_GST_DEBUG
guint idx;
gchar *datestring;
GST_DEBUG ("uri : %s", self->uri);
GST_DEBUG ("base_uri : %s", self->base_uri);
GST_DEBUG ("version : %d", self->version);
GST_DEBUG ("targetduration : %" GST_TIME_FORMAT,
GST_TIME_ARGS (self->targetduration));
GST_DEBUG ("media_sequence : %" G_GINT64_FORMAT, self->media_sequence);
GST_DEBUG ("discont_sequence : %" G_GINT64_FORMAT, self->discont_sequence);
GST_DEBUG ("endlist : %s",
self->endlist ? "present" : "NOT present");
GST_DEBUG ("i_frame : %s", self->i_frame ? "YES" : "NO");
GST_DEBUG ("EXT-X-KEY : %s",
self->ext_x_key_present ? "present" : "NOT present");
GST_DEBUG ("EXT-X-PROGRAM-DATE-TIME : %s",
self->ext_x_pdt_present ? "present" : "NOT present");
GST_DEBUG ("duration : %" GST_TIME_FORMAT,
GST_TIME_ARGS (self->duration));
GST_DEBUG ("Segments : %d", self->segments->len);
for (idx = 0; idx < self->segments->len; idx++) {
GstM3U8MediaSegment *segment = g_ptr_array_index (self->segments, idx);
GST_DEBUG (" sequence:%" G_GINT64_FORMAT " discont_sequence:%"
G_GINT64_FORMAT, segment->sequence, segment->discont_sequence);
GST_DEBUG (" stream_time : %" GST_STIME_FORMAT,
GST_STIME_ARGS (segment->stream_time));
GST_DEBUG (" duration : %" GST_TIME_FORMAT,
GST_TIME_ARGS (segment->duration));
if (segment->title)
GST_DEBUG (" title : %s", segment->title);
GST_DEBUG (" discont : %s", segment->discont ? "YES" : "NO");
if (segment->datetime) {
datestring = g_date_time_format_iso8601 (segment->datetime);
GST_DEBUG (" date/time : %s", datestring);
g_free (datestring);
}
GST_DEBUG (" uri : %s %" G_GUINT64_FORMAT " %" G_GINT64_FORMAT,
segment->uri, segment->offset, segment->size);
}
#endif
}
static void
gst_hls_media_playlist_postprocess_pdt (GstHLSMediaPlaylist * self)
{
gint idx, len = self->segments->len;
gint first_pdt = -1;
GstM3U8MediaSegment *previous = NULL;
GstM3U8MediaSegment *segment = NULL;
/* Iterate forward, and make sure datetimes are coherent */
for (idx = 0; idx < len; idx++, previous = segment) {
segment = g_ptr_array_index (self->segments, idx);
#define ABSDIFF(a,b) ((a) > (b) ? (a) - (b) : (b) - (a))
if (segment->datetime) {
if (first_pdt == -1)
first_pdt = idx;
if (!segment->discont && previous && previous->datetime) {
GstClockTimeDiff diff = g_date_time_difference (segment->datetime,
previous->datetime) * GST_USECOND;
if (ABSDIFF (diff, previous->duration) > 500 * GST_MSECOND) {
GST_LOG ("PDT diff %" GST_STIME_FORMAT " previous duration %"
GST_TIME_FORMAT, GST_STIME_ARGS (diff),
GST_TIME_ARGS (previous->duration));
g_date_time_unref (segment->datetime);
segment->datetime =
g_date_time_add (previous->datetime,
previous->duration / GST_USECOND);
}
}
} else {
if (segment->discont) {
GST_WARNING ("Discont segment doesn't have a PDT !");
} else if (previous) {
if (previous->datetime) {
segment->datetime =
g_date_time_add (previous->datetime,
previous->duration / GST_USECOND);
GST_LOG
("Generated new PDT based on previous segment PDT and duration");
} else {
GST_LOG ("Missing PDT, but can't generate it from previous one");
}
}
}
}
if (first_pdt != -1 && first_pdt != 0) {
GST_LOG ("Scanning backwards from %d", first_pdt);
previous = g_ptr_array_index (self->segments, first_pdt);
for (idx = first_pdt - 1; idx >= 0; idx = idx - 1) {
GST_LOG ("%d", idx);
segment = g_ptr_array_index (self->segments, idx);
if (!segment->datetime && previous->datetime) {
segment->datetime =
g_date_time_add (previous->datetime,
-(segment->duration / GST_USECOND));
}
previous = segment;
}
}
}
/* Parse and create a new GstHLSMediaPlaylist */
GstHLSMediaPlaylist *
gst_hls_media_playlist_parse (gchar * data, const gchar * uri,
const gchar * base_uri)
{
gchar *input_data = data;
GstHLSMediaPlaylist *self;
gint val;
GstClockTime duration;
gchar *title, *end;
gboolean discontinuity = FALSE;
gchar *current_key = NULL;
gboolean have_iv = FALSE;
guint8 iv[16] = { 0, };
gint64 size = -1, offset = -1;
gint64 mediasequence = 0;
gint64 dsn = 0;
GDateTime *date_time = NULL;
GstM3U8InitFile *last_init_file = NULL;
GstM3U8MediaSegment *previous = NULL;
GST_LOG ("uri: %s", uri);
GST_LOG ("base_uri: %s", base_uri);
GST_TRACE ("data:\n%s", data);
if (!g_str_has_prefix (data, "#EXTM3U")) {
GST_WARNING ("Data doesn't start with #EXTM3U");
g_free (data);
return NULL;
}
if (g_strrstr (data, "\n#EXT-X-STREAM-INF:") != NULL) {
GST_WARNING ("Not a media playlist, but a master playlist!");
g_free (data);
return NULL;
}
self = gst_hls_media_playlist_new (uri, base_uri);
/* Store a copy of the data */
self->last_data = g_strdup (data);
duration = 0;
title = NULL;
data += 7;
while (TRUE) {
gchar *r;
end = g_utf8_strchr (data, -1, '\n');
if (end)
*end = '\0';
r = g_utf8_strchr (data, -1, '\r');
if (r)
*r = '\0';
if (data[0] != '#' && data[0] != '\0') {
if (duration <= 0) {
GST_LOG ("%s: got line without EXTINF, dropping", data);
goto next_line;
}
data = uri_join (self->base_uri ? self->base_uri : self->uri, data);
/* Let's check this is not a bogus duplicate entry */
if (previous && !discontinuity && !g_strcmp0 (data, previous->uri)
&& (offset == -1 || previous->offset == offset)) {
GST_WARNING ("Dropping duplicate segment entry");
g_free (data);
data = NULL;
date_time = NULL;
duration = 0;
g_free (title);
title = NULL;
discontinuity = FALSE;
size = offset = -1;
goto next_line;
}
if (data != NULL) {
GstM3U8MediaSegment *file;
/* We can finally create the segment */
/* The disconinuity sequence number is only stored if the header has
* EXT-X-DISCONTINUITY-SEQUENCE present. */
file =
gst_m3u8_media_segment_new (data, title, duration, mediasequence++,
dsn);
self->duration += duration;
/* set encryption params */
file->key = current_key ? g_strdup (current_key) : NULL;
if (file->key) {
if (have_iv) {
memcpy (file->iv, iv, sizeof (iv));
} else {
guint8 *iv = file->iv + 12;
GST_WRITE_UINT32_BE (iv, file->sequence);
}
}
if (size != -1) {
file->size = size;
if (offset != -1) {
file->offset = offset;
} else {
file->offset = 0;
}
} else {
file->size = -1;
file->offset = 0;
}
file->datetime = date_time;
file->discont = discontinuity;
if (last_init_file)
file->init_file = gst_m3u8_init_file_ref (last_init_file);
date_time = NULL; /* Ownership was passed to the segment */
duration = 0;
title = NULL; /* Ownership was passed to the segment */
discontinuity = FALSE;
size = offset = -1;
g_ptr_array_add (self->segments, file);
previous = file;
}
} else if (g_str_has_prefix (data, "#EXTINF:")) {
gdouble fval;
if (!double_from_string (data + 8, &data, &fval)) {
GST_WARNING ("Can't read EXTINF duration");
goto next_line;
}
duration = fval * (gdouble) GST_SECOND;
if (self->targetduration > 0 && duration > self->targetduration) {
GST_DEBUG ("EXTINF duration (%" GST_TIME_FORMAT
") > TARGETDURATION (%" GST_TIME_FORMAT ")",
GST_TIME_ARGS (duration), GST_TIME_ARGS (self->targetduration));
}
if (!data || *data != ',')
goto next_line;
data = g_utf8_next_char (data);
if (data != end) {
g_free (title);
title = g_strdup (data);
}
} else if (g_str_has_prefix (data, "#EXT-X-")) {
gchar *data_ext_x = data + 7;
/* All these entries start with #EXT-X- */
if (g_str_has_prefix (data_ext_x, "ENDLIST")) {
self->endlist = TRUE;
} else if (g_str_has_prefix (data_ext_x, "VERSION:")) {
if (int_from_string (data + 15, &data, &val))
self->version = val;
} else if (g_str_has_prefix (data_ext_x, "PLAYLIST-TYPE:")) {
if (!g_strcmp0 (data + 21, "VOD"))
self->type = GST_HLS_PLAYLIST_TYPE_VOD;
else if (!g_strcmp0 (data + 21, "EVENT"))
self->type = GST_HLS_PLAYLIST_TYPE_EVENT;
else
GST_WARNING ("Unknown playlist type '%s'", data + 21);
} else if (g_str_has_prefix (data_ext_x, "TARGETDURATION:")) {
if (int_from_string (data + 22, &data, &val))
self->targetduration = val * GST_SECOND;
} else if (g_str_has_prefix (data_ext_x, "MEDIA-SEQUENCE:")) {
if (int_from_string (data + 22, &data, &val))
self->media_sequence = mediasequence = val;
} else if (g_str_has_prefix (data_ext_x, "DISCONTINUITY-SEQUENCE:")) {
if (int_from_string (data + 30, &data, &val)
&& val != self->discont_sequence) {
dsn = self->discont_sequence = val;
self->has_ext_x_dsn = TRUE;
}
} else if (g_str_has_prefix (data_ext_x, "DISCONTINUITY")) {
dsn++;
discontinuity = TRUE;
} else if (g_str_has_prefix (data_ext_x, "PROGRAM-DATE-TIME:")) {
date_time = g_date_time_new_from_iso8601 (data + 25, NULL);
if (date_time)
self->ext_x_pdt_present = TRUE;
} else if (g_str_has_prefix (data_ext_x, "ALLOW-CACHE:")) {
self->allowcache = g_ascii_strcasecmp (data + 19, "YES") == 0;
} else if (g_str_has_prefix (data_ext_x, "KEY:")) {
gchar *v, *a;
data = data + 11;
/* IV and KEY are only valid until the next #EXT-X-KEY */
have_iv = FALSE;
g_free (current_key);
current_key = NULL;
while (data && parse_attributes (&data, &a, &v)) {
if (g_str_equal (a, "URI")) {
current_key =
uri_join (self->base_uri ? self->base_uri : self->uri, v);
} else if (g_str_equal (a, "IV")) {
gchar *ivp = v;
gint i;
if (strlen (ivp) < 32 + 2 || (!g_str_has_prefix (ivp, "0x")
&& !g_str_has_prefix (ivp, "0X"))) {
GST_WARNING ("Can't read IV");
continue;
}
ivp += 2;
for (i = 0; i < 16; i++) {
gint h, l;
h = g_ascii_xdigit_value (*ivp);
ivp++;
l = g_ascii_xdigit_value (*ivp);
ivp++;
if (h == -1 || l == -1) {
i = -1;
break;
}
iv[i] = (h << 4) | l;
}
if (i == -1) {
GST_WARNING ("Can't read IV");
continue;
}
have_iv = TRUE;
} else if (g_str_equal (a, "METHOD")) {
if (!g_str_equal (v, "AES-128") && !g_str_equal (v, "NONE")) {
GST_WARNING ("Encryption method %s not supported", v);
continue;
}
self->ext_x_key_present = TRUE;
}
}
} else if (g_str_has_prefix (data_ext_x, "BYTERANGE:")) {
gchar *v = data + 17;
size = -1;
offset = -1;
if (int64_from_string (v, &v, &size)) {
if (*v == '@' && !int64_from_string (v + 1, &v, &offset))
goto next_line;
/* */
if (offset == -1 && previous)
offset = previous->offset + previous->size;
} else {
goto next_line;
}
} else if (g_str_has_prefix (data_ext_x, "MAP:")) {
gchar *v, *a, *header_uri = NULL;
data = data + 11;
while (data != NULL && parse_attributes (&data, &a, &v)) {
if (strcmp (a, "URI") == 0) {
header_uri =
uri_join (self->base_uri ? self->base_uri : self->uri, v);
} else if (strcmp (a, "BYTERANGE") == 0) {
if (int64_from_string (v, &v, &size)) {
if (*v == '@' && !int64_from_string (v + 1, &v, &offset)) {
g_free (header_uri);
goto next_line;
}
} else {
g_free (header_uri);
goto next_line;
}
}
}
if (header_uri) {
GstM3U8InitFile *init_file;
init_file = gst_m3u8_init_file_new (header_uri);
if (size != -1) {
init_file->size = size;
if (offset != -1)
init_file->offset = offset;
else
init_file->offset = 0;
} else {
init_file->size = -1;
init_file->offset = 0;
}
if (last_init_file)
gst_m3u8_init_file_unref (last_init_file);
last_init_file = init_file;
}
} else {
GST_LOG ("Ignored line: %s", data);
}
} else if (data[0]) {
/* Log non-empty lines */
GST_LOG ("Ignored line: `%s`", data);
}
next_line:
if (!end)
break;
data = g_utf8_next_char (end); /* skip \n */
}
/* Clean up date that wasn't freed / handed to a segment */
g_free (current_key);
current_key = NULL;
if (date_time)
g_date_time_unref (date_time);
g_free (title);
g_free (input_data);
if (last_init_file)
gst_m3u8_init_file_unref (last_init_file);
if (self->segments->len == 0) {
GST_ERROR ("Invalid media playlist, it does not contain any media files");
gst_hls_media_playlist_unref (self);
return NULL;
}
/* Now go over the parsed data to ensure MSN and/or PDT are set */
if (self->ext_x_pdt_present)
gst_hls_media_playlist_postprocess_pdt (self);
/* If we are not live, the stream time can be directly applied */
if (!GST_HLS_MEDIA_PLAYLIST_IS_LIVE (self)) {
gint iter, len = self->segments->len;
GstClockTimeDiff stream_time = 0;
for (iter = 0; iter < len; iter++) {
GstM3U8MediaSegment *segment = g_ptr_array_index (self->segments, iter);
segment->stream_time = stream_time;
stream_time += segment->duration;
}
}
gst_hls_media_playlist_dump (self);
return self;
}
/* Returns TRUE if the m3u8 as the same data as playlist_data */
gboolean
gst_hls_media_playlist_has_same_data (GstHLSMediaPlaylist * self,
gchar * playlist_data)
{
gboolean ret;
GST_HLS_MEDIA_PLAYLIST_LOCK (self);
ret = self->last_data && g_str_equal (self->last_data, playlist_data);
GST_HLS_MEDIA_PLAYLIST_UNLOCK (self);
return ret;
}
GstM3U8MediaSegment *
gst_hls_media_playlist_seek (GstHLSMediaPlaylist * playlist, gboolean forward,
GstSeekFlags flags, GstClockTimeDiff ts)
{
gboolean snap_nearest =
(flags & GST_SEEK_FLAG_SNAP_NEAREST) == GST_SEEK_FLAG_SNAP_NEAREST;
gboolean snap_after =
(flags & GST_SEEK_FLAG_SNAP_AFTER) == GST_SEEK_FLAG_SNAP_AFTER;
guint idx;
GstM3U8MediaSegment *res = NULL;
GST_DEBUG ("ts:%" GST_STIME_FORMAT " forward:%d playlist uri: %s",
GST_STIME_ARGS (ts), forward, playlist->uri);
for (idx = 0; idx < playlist->segments->len; idx++) {
GstM3U8MediaSegment *cand = g_ptr_array_index (playlist->segments, idx);
if ((forward & snap_after) || snap_nearest) {
if (cand->stream_time >= ts ||
(snap_nearest && (ts - cand->stream_time < cand->duration / 2))) {
res = cand;
goto out;
}
} else if (!forward && snap_after) {
GstClockTime next_pos = cand->stream_time + cand->duration;
if (next_pos <= ts && ts < next_pos + cand->duration) {
res = cand;
goto out;
}
} else if ((cand->stream_time <= ts || idx == 0)
&& ts < cand->stream_time + cand->duration) {
res = cand;
goto out;
}
}
out:
if (res) {
GST_DEBUG ("Returning segment sn:%" G_GINT64_FORMAT " stream_time:%"
GST_STIME_FORMAT " duration:%" GST_TIME_FORMAT, res->sequence,
GST_STIME_ARGS (res->stream_time), GST_TIME_ARGS (res->duration));
gst_m3u8_media_segment_ref (res);
} else {
GST_DEBUG ("Couldn't find a match");
}
return res;
}
/* Recalculate all segment DSN based on the DSN of the provided anchor segment
* (which must belong to the playlist). */
static void
gst_hls_media_playlist_recalculate_dsn (GstHLSMediaPlaylist * playlist,
GstM3U8MediaSegment * anchor)
{
guint idx;
gint iter;
GstM3U8MediaSegment *cand, *prev;
if (!g_ptr_array_find (playlist->segments, anchor, &idx)) {
g_assert (FALSE);
}
g_assert (idx != -1);
GST_DEBUG ("Re-calculating DSN from segment #%d %" G_GINT64_FORMAT,
idx, anchor->discont_sequence);
/* Forward */
prev = anchor;
for (iter = idx + 1; iter < playlist->segments->len; iter++) {
cand = g_ptr_array_index (playlist->segments, iter);
if (cand->discont)
cand->discont_sequence = prev->discont_sequence + 1;
else
cand->discont_sequence = prev->discont_sequence;
prev = cand;
}
/* Backward */
prev = anchor;
for (iter = idx - 1; iter >= 0; iter--) {
cand = g_ptr_array_index (playlist->segments, iter);
if (prev->discont)
cand->discont_sequence = prev->discont_sequence - 1;
else
cand->discont_sequence = prev->discont_sequence;
prev = cand;
}
}
/* Recalculate all segment stream time based on the stream time of the provided
* anchor segment (which must belong to the playlist) */
void
gst_hls_media_playlist_recalculate_stream_time (GstHLSMediaPlaylist * playlist,
GstM3U8MediaSegment * anchor)
{
guint idx;
gint iter;
GstM3U8MediaSegment *cand, *prev;
if (!g_ptr_array_find (playlist->segments, anchor, &idx)) {
g_assert (FALSE);
}
g_assert (GST_CLOCK_TIME_IS_VALID (anchor->stream_time));
g_assert (idx != -1);
GST_DEBUG ("Re-calculating stream times from segment #%d %" GST_TIME_FORMAT,
idx, GST_TIME_ARGS (anchor->stream_time));
/* Forward */
prev = anchor;
for (iter = idx + 1; iter < playlist->segments->len; iter++) {
cand = g_ptr_array_index (playlist->segments, iter);
cand->stream_time = prev->stream_time + prev->duration;
GST_DEBUG ("Forward iter %d %" GST_STIME_FORMAT, iter,
GST_STIME_ARGS (cand->stream_time));
prev = cand;
}
/* Backward */
prev = anchor;
for (iter = idx - 1; iter >= 0; iter--) {
cand = g_ptr_array_index (playlist->segments, iter);
cand->stream_time = prev->stream_time - cand->duration;
GST_DEBUG ("Backward iter %d %" GST_STIME_FORMAT, iter,
GST_STIME_ARGS (cand->stream_time));
prev = cand;
}
}
/* If a segment with the same URI, size, offset, SN and DSN is present in the
* playlist, returns that one */
static GstM3U8MediaSegment *
gst_hls_media_playlist_find_by_uri (GstHLSMediaPlaylist * playlist,
GstM3U8MediaSegment * segment)
{
guint idx;
for (idx = 0; idx < playlist->segments->len; idx++) {
GstM3U8MediaSegment *cand = g_ptr_array_index (playlist->segments, idx);
if (cand->sequence == segment->sequence &&
cand->discont_sequence == segment->discont_sequence &&
cand->offset == segment->offset && cand->size == segment->size &&
!g_strcmp0 (cand->uri, segment->uri)) {
return cand;
}
}
return NULL;
}
/* Find the equivalent segment in the given playlist.
*
* The returned segment does *NOT* have increased reference !
*
* If the provided segment is just before the first entry of the playlist, it
* will be added to the playlist (with a reference) and is_before will be set to
* TRUE.
*/
static GstM3U8MediaSegment *
find_segment_in_playlist (GstHLSMediaPlaylist * playlist,
GstM3U8MediaSegment * segment, gboolean * is_before)
{
GstM3U8MediaSegment *res = NULL;
guint idx;
*is_before = FALSE;
/* The easy one. Happens when stream times need to be re-synced in an existing
* playlist */
if (g_ptr_array_find (playlist->segments, segment, NULL)) {
GST_DEBUG ("Present as-is in playlist");
return segment;
}
/* If there is an identical segment with the same URI and SN, use that one */
res = gst_hls_media_playlist_find_by_uri (playlist, segment);
if (res) {
GST_DEBUG ("Using same URI/DSN/SN match");
return res;
}
/* Try with PDT */
if (segment->datetime && playlist->ext_x_pdt_present) {
#ifndef GST_DISABLE_GST_DEBUG
gchar *pdtstring = g_date_time_format_iso8601 (segment->datetime);
GST_DEBUG ("Search by datetime for %s", pdtstring);
g_free (pdtstring);
#endif
for (idx = 0; idx < playlist->segments->len; idx++) {
GstM3U8MediaSegment *cand = g_ptr_array_index (playlist->segments, idx);
if (idx == 0 && cand->datetime) {
/* Special case for segments which are just before the 1st one (within
* 20ms). We add another reference because it now also belongs to the
* current playlist */
GDateTime *seg_end = g_date_time_add (segment->datetime,
segment->duration / GST_USECOND);
GstClockTimeDiff ddiff =
g_date_time_difference (cand->datetime, seg_end) * GST_USECOND;
g_date_time_unref (seg_end);
if (ABS (ddiff) < 20 * GST_MSECOND) {
/* The reference segment ends within 20ms of the first segment, it is just before */
GST_DEBUG ("Reference segment ends within %" GST_STIME_FORMAT
" of first playlist segment, inserting before",
GST_STIME_ARGS (ddiff));
g_ptr_array_insert (playlist->segments, 0,
gst_m3u8_media_segment_ref (segment));
*is_before = TRUE;
return segment;
}
if (ddiff > 0) {
/* If the reference segment is completely before the first segment, bail out */
GST_DEBUG ("Reference segment ends before first segment");
break;
}
}
if (cand->datetime
&& g_date_time_difference (cand->datetime, segment->datetime) >= 0) {
GST_DEBUG ("Picking by date time");
return cand;
}
}
}
/* If not live, we can match by stream time */
if (!GST_HLS_MEDIA_PLAYLIST_IS_LIVE (playlist)) {
GST_DEBUG ("Search by Stream time for %" GST_STIME_FORMAT " duration:%"
GST_TIME_FORMAT, GST_STIME_ARGS (segment->stream_time),
GST_TIME_ARGS (segment->duration));
for (idx = 0; idx < playlist->segments->len; idx++) {
GstM3U8MediaSegment *cand = g_ptr_array_index (playlist->segments, idx);
/* If the candidate starts at or after the previous stream time */
if (cand->stream_time >= segment->stream_time) {
return cand;
}
/* If the previous end stream time is before the candidate end stream time */
if ((segment->stream_time + segment->duration) <
(cand->stream_time + cand->duration)) {
return cand;
}
}
}
/* Fallback with MSN */
GST_DEBUG ("Search by Media Sequence Number for sn:%" G_GINT64_FORMAT " dsn:%"
G_GINT64_FORMAT, segment->sequence, segment->discont_sequence);
for (idx = 0; idx < playlist->segments->len; idx++) {
GstM3U8MediaSegment *cand = g_ptr_array_index (playlist->segments, idx);
/* Ignore non-matching DSN if needed */
if ((segment->discont_sequence != cand->discont_sequence)
&& playlist->has_ext_x_dsn)
continue;
if (idx == 0 && cand->sequence == segment->sequence + 1) {
/* Special case for segments just before the 1st one. We add another
* reference because it now also belongs to the current playlist */
GST_DEBUG ("reference segment is just before 1st segment, inserting");
g_ptr_array_insert (playlist->segments, 0,
gst_m3u8_media_segment_ref (segment));
*is_before = TRUE;
return segment;
}
if (cand->sequence == segment->sequence) {
return cand;
}
}
return NULL;
}
/* Given a media segment (potentially from another media playlist), find the
* equivalent media segment in this playlist.
*
* This will also recalculate all stream times based on that segment stream
* time (i.e. "sync" the playlist to that previous time).
*
* If an equivalent/identical one is found it is returned with
* the reference count incremented
*/
GstM3U8MediaSegment *
gst_hls_media_playlist_sync_to_segment (GstHLSMediaPlaylist * playlist,
GstM3U8MediaSegment * segment)
{
GstM3U8MediaSegment *res = NULL;
gboolean is_before;
#ifndef GST_DISABLE_GST_DEBUG
gchar *pdtstring;
#endif
g_return_val_if_fail (playlist, NULL);
g_return_val_if_fail (segment, NULL);
GST_DEBUG ("Re-syncing to segment %" GST_STIME_FORMAT " duration:%"
GST_TIME_FORMAT " sn:%" G_GINT64_FORMAT "/dsn:%" G_GINT64_FORMAT
" uri:%s in playlist %s", GST_STIME_ARGS (segment->stream_time),
GST_TIME_ARGS (segment->duration), segment->sequence,
segment->discont_sequence, segment->uri, playlist->uri);
res = find_segment_in_playlist (playlist, segment, &is_before);
/* For live playlists we re-calculate all stream times based on the existing
* stream time. Non-live playlists have their stream time calculated at
* parsing time. */
if (res) {
if (!is_before)
gst_m3u8_media_segment_ref (res);
if (res->stream_time == GST_CLOCK_STIME_NONE)
res->stream_time = segment->stream_time;
if (GST_HLS_MEDIA_PLAYLIST_IS_LIVE (playlist))
gst_hls_media_playlist_recalculate_stream_time (playlist, res);
/* If the playlist didn't specify a reference discont sequence number, we
* carry over the one from the reference segment */
if (!playlist->has_ext_x_dsn
&& res->discont_sequence != segment->discont_sequence) {
res->discont_sequence = segment->discont_sequence;
gst_hls_media_playlist_recalculate_dsn (playlist, res);
}
if (is_before) {
GST_DEBUG ("Dropping segment from before the playlist");
g_ptr_array_remove_index (playlist->segments, 0);
res = NULL;
}
}
#ifndef GST_DISABLE_GST_DEBUG
if (res) {
pdtstring =
res->datetime ? g_date_time_format_iso8601 (res->datetime) : NULL;
GST_DEBUG ("Returning segment sn:%" G_GINT64_FORMAT " dsn:%" G_GINT64_FORMAT
" stream_time:%" GST_STIME_FORMAT " duration:%" GST_TIME_FORMAT
" datetime:%s", res->sequence, res->discont_sequence,
GST_STIME_ARGS (res->stream_time), GST_TIME_ARGS (res->duration),
pdtstring);
g_free (pdtstring);
} else {
GST_DEBUG ("Could not find a match");
}
#endif
return res;
}
GstM3U8MediaSegment *
gst_hls_media_playlist_get_starting_segment (GstHLSMediaPlaylist * self)
{
GstM3U8MediaSegment *res;
GST_DEBUG ("playlist %s", self->uri);
if (!GST_HLS_MEDIA_PLAYLIST_IS_LIVE (self)) {
/* For non-live, we just grab the first one */
res = g_ptr_array_index (self->segments, 0);
} else {
/* Live playlist */
res =
g_ptr_array_index (self->segments,
MAX ((gint) self->segments->len - GST_M3U8_LIVE_MIN_FRAGMENT_DISTANCE -
1, 0));
}
if (res) {
GST_DEBUG ("Using segment sn:%" G_GINT64_FORMAT " dsn:%" G_GINT64_FORMAT,
res->sequence, res->discont_sequence);
gst_m3u8_media_segment_ref (res);
}
return res;
}
/* Calls this to carry over stream time, DSN, ... from one playlist to another.
*
* This should be used when a reference media segment couldn't be matched in the
* playlist, but we still want to carry over the information from a reference
* playlist to an updated one. This can happen with live playlists where the
* reference media segment is no longer present but the playlists intersect */
gboolean
gst_hls_media_playlist_sync_to_playlist (GstHLSMediaPlaylist * playlist,
GstHLSMediaPlaylist * reference)
{
GstM3U8MediaSegment *res = NULL;
GstM3U8MediaSegment *cand = NULL;
guint idx;
gboolean is_before;
g_return_val_if_fail (playlist && reference, FALSE);
retry_without_dsn:
/* The new playlist is supposed to be an update of the reference playlist,
* therefore we will try from the last segment of the reference playlist and
* go backwards */
for (idx = reference->segments->len - 1; idx; idx--) {
cand = g_ptr_array_index (reference->segments, idx);
res = find_segment_in_playlist (playlist, cand, &is_before);
if (res)
break;
}
if (res == NULL) {
if (playlist->has_ext_x_dsn) {
/* There is a possibility that the server doesn't have coherent DSN
* accross variants/renditions. If we reach this section, this means that
* we have already attempted matching by PDT, URI, stream time. The last
* matching would have been by MSN/DSN, therefore try it again without
* taking DSN into account. */
GST_DEBUG ("Retrying matching without taking DSN into account");
playlist->has_ext_x_dsn = FALSE;
goto retry_without_dsn;
}
GST_WARNING ("Could not synchronize media playlists");
return FALSE;
}
/* Carry over reference stream time */
if (res->stream_time == GST_CLOCK_STIME_NONE)
res->stream_time = cand->stream_time;
if (GST_HLS_MEDIA_PLAYLIST_IS_LIVE (playlist))
gst_hls_media_playlist_recalculate_stream_time (playlist, res);
/* If the playlist didn't specify a reference discont sequence number, we
* carry over the one from the reference segment */
if (!playlist->has_ext_x_dsn
&& res->discont_sequence != cand->discont_sequence) {
res->discont_sequence = cand->discont_sequence;
gst_hls_media_playlist_recalculate_dsn (playlist, res);
}
if (is_before) {
g_ptr_array_remove_index (playlist->segments, 0);
}
return TRUE;
}
gboolean
gst_hls_media_playlist_has_next_fragment (GstHLSMediaPlaylist * m3u8,
GstM3U8MediaSegment * current, gboolean forward)
{
guint idx;
gboolean have_next = TRUE;
g_return_val_if_fail (m3u8 != NULL, FALSE);
g_return_val_if_fail (current != NULL, FALSE);
GST_DEBUG ("playlist %s", m3u8->uri);
GST_HLS_MEDIA_PLAYLIST_LOCK (m3u8);
if (!g_ptr_array_find (m3u8->segments, current, &idx))
have_next = FALSE;
else if (idx == 0 && !forward)
have_next = FALSE;
else if (forward && idx == (m3u8->segments->len - 1))
have_next = FALSE;
GST_HLS_MEDIA_PLAYLIST_UNLOCK (m3u8);
GST_DEBUG ("Returning %d", have_next);
return have_next;
}
GstM3U8MediaSegment *
gst_hls_media_playlist_advance_fragment (GstHLSMediaPlaylist * m3u8,
GstM3U8MediaSegment * current, gboolean forward)
{
GstM3U8MediaSegment *file = NULL;
guint idx;
g_return_val_if_fail (m3u8 != NULL, NULL);
g_return_val_if_fail (current != NULL, NULL);
GST_HLS_MEDIA_PLAYLIST_LOCK (m3u8);
GST_DEBUG ("playlist %s", m3u8->uri);
if (m3u8->segments->len < 2) {
GST_DEBUG ("Playlist only contains one fragment, can't advance");
goto out;
}
if (!g_ptr_array_find (m3u8->segments, current, &idx)) {
GST_ERROR ("Requested to advance froma fragment not present in playlist");
goto out;
}
if (forward && idx < (m3u8->segments->len - 1)) {
file =
gst_m3u8_media_segment_ref (g_ptr_array_index (m3u8->segments,
idx + 1));
} else if (!forward && idx > 0) {
file =
gst_m3u8_media_segment_ref (g_ptr_array_index (m3u8->segments,
idx - 1));
}
if (file)
GST_DEBUG ("Advanced to segment sn:%" G_GINT64_FORMAT " dsn:%"
G_GINT64_FORMAT, file->sequence, file->discont_sequence);
else
GST_DEBUG ("Could not find %s fragment", forward ? "next" : "previous");
out:
GST_HLS_MEDIA_PLAYLIST_UNLOCK (m3u8);
return file;
}
GstClockTime
gst_hls_media_playlist_get_duration (GstHLSMediaPlaylist * m3u8)
{
GstClockTime duration = GST_CLOCK_TIME_NONE;
g_return_val_if_fail (m3u8 != NULL, GST_CLOCK_TIME_NONE);
GST_DEBUG ("playlist %s", m3u8->uri);
GST_HLS_MEDIA_PLAYLIST_LOCK (m3u8);
/* We can only get the duration for on-demand streams */
if (m3u8->endlist) {
if (m3u8->segments->len) {
GstM3U8MediaSegment *first = g_ptr_array_index (m3u8->segments, 0);
GstM3U8MediaSegment *last =
g_ptr_array_index (m3u8->segments, m3u8->segments->len - 1);
duration = last->stream_time + last->duration - first->stream_time;
if (duration != m3u8->duration)
GST_ERROR ("difference in calculated duration ? %" GST_TIME_FORMAT
" vs %" GST_TIME_FORMAT, GST_TIME_ARGS (duration),
GST_TIME_ARGS (m3u8->duration));
}
duration = m3u8->duration;
}
GST_HLS_MEDIA_PLAYLIST_UNLOCK (m3u8);
GST_DEBUG ("duration %" GST_TIME_FORMAT, GST_TIME_ARGS (duration));
return duration;
}
gchar *
gst_hls_media_playlist_get_uri (GstHLSMediaPlaylist * m3u8)
{
gchar *uri;
GST_HLS_MEDIA_PLAYLIST_LOCK (m3u8);
uri = g_strdup (m3u8->uri);
GST_HLS_MEDIA_PLAYLIST_UNLOCK (m3u8);
return uri;
}
gboolean
gst_hls_media_playlist_is_live (GstHLSMediaPlaylist * m3u8)
{
gboolean is_live;
g_return_val_if_fail (m3u8 != NULL, FALSE);
GST_HLS_MEDIA_PLAYLIST_LOCK (m3u8);
is_live = GST_HLS_MEDIA_PLAYLIST_IS_LIVE (m3u8);
GST_HLS_MEDIA_PLAYLIST_UNLOCK (m3u8);
return is_live;
}
gchar *
uri_join (const gchar * uri1, const gchar * uri2)
{
gchar *uri_copy, *tmp, *ret = NULL;
if (gst_uri_is_valid (uri2))
return g_strdup (uri2);
uri_copy = g_strdup (uri1);
if (uri2[0] != '/') {
/* uri2 is a relative uri2 */
/* look for query params */
tmp = g_utf8_strchr (uri_copy, -1, '?');
if (tmp) {
/* find last / char, ignoring query params */
tmp = g_utf8_strrchr (uri_copy, tmp - uri_copy, '/');
} else {
/* find last / char in URL */
tmp = g_utf8_strrchr (uri_copy, -1, '/');
}
if (!tmp)
goto out;
*tmp = '\0';
ret = g_strdup_printf ("%s/%s", uri_copy, uri2);
} else {
/* uri2 is an absolute uri2 */
char *scheme, *hostname;
scheme = uri_copy;
/* find the : in <scheme>:// */
tmp = g_utf8_strchr (uri_copy, -1, ':');
if (!tmp)
goto out;
*tmp = '\0';
/* skip :// */
hostname = tmp + 3;
tmp = g_utf8_strchr (hostname, -1, '/');
if (tmp)
*tmp = '\0';
ret = g_strdup_printf ("%s://%s%s", scheme, hostname, uri2);
}
out:
g_free (uri_copy);
if (!ret)
GST_WARNING ("Can't build a valid uri from '%s' '%s'", uri1, uri2);
return ret;
}
gboolean
gst_hls_media_playlist_has_lost_sync (GstHLSMediaPlaylist * m3u8,
GstClockTime position)
{
GstM3U8MediaSegment *first;
if (m3u8->segments->len < 1)
return TRUE;
first = g_ptr_array_index (m3u8->segments, 0);
GST_DEBUG ("position %" GST_TIME_FORMAT " first %" GST_STIME_FORMAT
" duration %" GST_STIME_FORMAT, GST_TIME_ARGS (position),
GST_STIME_ARGS (first->stream_time), GST_STIME_ARGS (first->duration));
if (first->stream_time <= 0)
return FALSE;
/* If we're definitely before the first fragment, we lost sync */
if ((position + (first->duration / 2)) < first->stream_time)
return TRUE;
return FALSE;
}
gboolean
gst_hls_media_playlist_get_seek_range (GstHLSMediaPlaylist * m3u8,
gint64 * start, gint64 * stop)
{
GstM3U8MediaSegment *first, *last;
guint min_distance = 1;
g_return_val_if_fail (m3u8 != NULL, FALSE);
if (m3u8->segments->len < 1)
return FALSE;
first = g_ptr_array_index (m3u8->segments, 0);
*start = first->stream_time;
if (GST_HLS_MEDIA_PLAYLIST_IS_LIVE (m3u8) && m3u8->segments->len > 1) {
/* min_distance is used to make sure the seek range is never closer than
GST_M3U8_LIVE_MIN_FRAGMENT_DISTANCE fragments from the end of a live
playlist - see 6.3.3. "Playing the Playlist file" of the HLS draft */
min_distance =
MIN (GST_M3U8_LIVE_MIN_FRAGMENT_DISTANCE, m3u8->segments->len - 1);
}
last = g_ptr_array_index (m3u8->segments, m3u8->segments->len - min_distance);
*stop = last->stream_time + last->duration;
return TRUE;
}
GstClockTime
gst_hls_media_playlist_recommended_buffering_threshold (GstHLSMediaPlaylist *
playlist)
{
if (!playlist->duration || !GST_CLOCK_TIME_IS_VALID (playlist->duration)
|| playlist->segments->len == 0)
return GST_CLOCK_TIME_NONE;
/* The recommended buffering threshold is 1.5 average segment duration */
return 3 * (playlist->duration / playlist->segments->len) / 2;
}
GstHLSRenditionStream *
gst_hls_rendition_stream_ref (GstHLSRenditionStream * media)
{
g_assert (media != NULL && media->ref_count > 0);
g_atomic_int_add (&media->ref_count, 1);
return media;
}
void
gst_hls_rendition_stream_unref (GstHLSRenditionStream * media)
{
g_assert (media != NULL && media->ref_count > 0);
if (g_atomic_int_dec_and_test (&media->ref_count)) {
if (media->caps)
gst_caps_unref (media->caps);
g_free (media->group_id);
g_free (media->name);
g_free (media->uri);
g_free (media->lang);
g_free (media);
}
}
static GstHLSRenditionStreamType
gst_m3u8_get_hls_media_type_from_string (const gchar * type_name)
{
if (strcmp (type_name, "AUDIO") == 0)
return GST_HLS_RENDITION_STREAM_TYPE_AUDIO;
if (strcmp (type_name, "VIDEO") == 0)
return GST_HLS_RENDITION_STREAM_TYPE_VIDEO;
if (strcmp (type_name, "SUBTITLES") == 0)
return GST_HLS_RENDITION_STREAM_TYPE_SUBTITLES;
if (strcmp (type_name, "CLOSED_CAPTIONS") == 0)
return GST_HLS_RENDITION_STREAM_TYPE_CLOSED_CAPTIONS;
return GST_HLS_RENDITION_STREAM_TYPE_INVALID;
}
#define GST_HLS_RENDITION_STREAM_TYPE_NAME(mtype) gst_hls_rendition_stream_type_get_name(mtype)
const gchar *
gst_hls_rendition_stream_type_get_name (GstHLSRenditionStreamType mtype)
{
static const gchar *nicks[GST_HLS_N_MEDIA_TYPES] = { "audio", "video",
"subtitle", "closed-captions"
};
if (mtype < 0 || mtype >= GST_HLS_N_MEDIA_TYPES)
return "invalid";
return nicks[mtype];
}
/* returns unquoted copy of string */
static gchar *
gst_m3u8_unquote (const gchar * str)
{
const gchar *start, *end;
start = strchr (str, '"');
if (start == NULL)
return g_strdup (str);
end = strchr (start + 1, '"');
if (end == NULL) {
GST_WARNING ("Broken quoted string [%s] - can't find end quote", str);
return g_strdup (start + 1);
}
return g_strndup (start + 1, (gsize) (end - (start + 1)));
}
static GstHLSRenditionStream *
gst_m3u8_parse_media (gchar * desc, const gchar * base_uri)
{
GstHLSRenditionStream *media;
gchar *a, *v;
media = g_new0 (GstHLSRenditionStream, 1);
media->ref_count = 1;
media->mtype = GST_HLS_RENDITION_STREAM_TYPE_INVALID;
GST_LOG ("parsing %s", desc);
while (desc != NULL && parse_attributes (&desc, &a, &v)) {
if (strcmp (a, "TYPE") == 0) {
media->mtype = gst_m3u8_get_hls_media_type_from_string (v);
} else if (strcmp (a, "GROUP-ID") == 0) {
g_free (media->group_id);
media->group_id = gst_m3u8_unquote (v);
} else if (strcmp (a, "NAME") == 0) {
g_free (media->name);
media->name = gst_m3u8_unquote (v);
} else if (strcmp (a, "URI") == 0) {
gchar *uri;
g_free (media->uri);
uri = gst_m3u8_unquote (v);
media->uri = uri_join (base_uri, uri);
g_free (uri);
} else if (strcmp (a, "LANGUAGE") == 0) {
g_free (media->lang);
media->lang = gst_m3u8_unquote (v);
} else if (strcmp (a, "DEFAULT") == 0) {
media->is_default = g_ascii_strcasecmp (v, "yes") == 0;
} else if (strcmp (a, "FORCED") == 0) {
media->forced = g_ascii_strcasecmp (v, "yes") == 0;
} else if (strcmp (a, "AUTOSELECT") == 0) {
media->autoselect = g_ascii_strcasecmp (v, "yes") == 0;
} else {
/* unhandled: ASSOC-LANGUAGE, INSTREAM-ID, CHARACTERISTICS */
GST_FIXME ("EXT-X-MEDIA: unhandled attribute: %s = %s", a, v);
}
}
if (media->mtype == GST_HLS_RENDITION_STREAM_TYPE_INVALID)
goto required_attributes_missing;
if (media->group_id == NULL || media->name == NULL)
goto required_attributes_missing;
if (media->mtype == GST_HLS_RENDITION_STREAM_TYPE_CLOSED_CAPTIONS)
goto uri_with_cc;
GST_DEBUG ("media: %s, group '%s', name '%s', uri '%s', %s %s %s, lang=%s",
GST_HLS_RENDITION_STREAM_TYPE_NAME (media->mtype), media->group_id,
media->name, media->uri, media->is_default ? "default" : "-",
media->autoselect ? "autoselect" : "-", media->forced ? "forced" : "-",
media->lang ? media->lang : "??");
return media;
uri_with_cc:
{
GST_WARNING ("closed captions EXT-X-MEDIA should not have URI specified");
goto out_error;
}
required_attributes_missing:
{
GST_WARNING ("EXT-X-MEDIA description is missing required attributes");
goto out_error;
}
out_error:
{
gst_hls_rendition_stream_unref (media);
return NULL;
}
}
GstStreamType
gst_hls_get_stream_type_from_structure (GstStructure * st)
{
const gchar *name = gst_structure_get_name (st);
if (g_str_has_prefix (name, "audio/"))
return GST_STREAM_TYPE_AUDIO;
if (g_str_has_prefix (name, "video/"))
return GST_STREAM_TYPE_VIDEO;
if (g_str_has_prefix (name, "application/x-subtitle"))
return GST_STREAM_TYPE_TEXT;
return 0;
}
GstStreamType
gst_hls_get_stream_type_from_caps (GstCaps * caps)
{
GstStreamType ret = 0;
guint i, nb;
nb = gst_caps_get_size (caps);
for (i = 0; i < nb; i++) {
GstStructure *cand = gst_caps_get_structure (caps, i);
ret |= gst_hls_get_stream_type_from_structure (cand);
}
return ret;
}
static GstHLSVariantStream *
gst_hls_variant_stream_new (void)
{
GstHLSVariantStream *stream;
stream = g_new0 (GstHLSVariantStream, 1);
stream->refcount = 1;
stream->codecs_stream_type = 0;
return stream;
}
GstHLSVariantStream *
hls_variant_stream_ref (GstHLSVariantStream * stream)
{
g_atomic_int_inc (&stream->refcount);
return stream;
}
void
hls_variant_stream_unref (GstHLSVariantStream * stream)
{
if (g_atomic_int_dec_and_test (&stream->refcount)) {
gint i;
g_free (stream->name);
g_free (stream->uri);
g_free (stream->codecs);
if (stream->caps)
gst_caps_unref (stream->caps);
for (i = 0; i < GST_HLS_N_MEDIA_TYPES; ++i) {
g_free (stream->media_groups[i]);
}
g_list_free_full (stream->fallback, g_free);
g_free (stream);
}
}
static GstHLSVariantStream *
gst_hls_variant_parse (gchar * data, const gchar * base_uri)
{
GstHLSVariantStream *stream;
gchar *v, *a;
stream = gst_hls_variant_stream_new ();
stream->iframe = g_str_has_prefix (data, "#EXT-X-I-FRAME-STREAM-INF:");
data += stream->iframe ? 26 : 18;
while (data && parse_attributes (&data, &a, &v)) {
if (g_str_equal (a, "BANDWIDTH")) {
if (!stream->bandwidth) {
if (!int_from_string (v, NULL, &stream->bandwidth))
GST_WARNING ("Error while reading BANDWIDTH");
}
} else if (g_str_equal (a, "AVERAGE-BANDWIDTH")) {
GST_DEBUG
("AVERAGE-BANDWIDTH attribute available. Using it as stream bandwidth");
if (!int_from_string (v, NULL, &stream->bandwidth))
GST_WARNING ("Error while reading AVERAGE-BANDWIDTH");
} else if (g_str_equal (a, "PROGRAM-ID")) {
if (!int_from_string (v, NULL, &stream->program_id))
GST_WARNING ("Error while reading PROGRAM-ID");
} else if (g_str_equal (a, "CODECS")) {
g_free (stream->codecs);
stream->codecs = g_strdup (v);
stream->caps = gst_codec_utils_caps_from_mime_codec (stream->codecs);
stream->codecs_stream_type =
gst_hls_get_stream_type_from_caps (stream->caps);
} else if (g_str_equal (a, "RESOLUTION")) {
if (!int_from_string (v, &v, &stream->width))
GST_WARNING ("Error while reading RESOLUTION width");
if (!v || *v != 'x') {
GST_WARNING ("Missing height");
} else {
v = g_utf8_next_char (v);
if (!int_from_string (v, NULL, &stream->height))
GST_WARNING ("Error while reading RESOLUTION height");
}
} else if (stream->iframe && g_str_equal (a, "URI")) {
stream->uri = uri_join (base_uri, v);
} else if (g_str_equal (a, "AUDIO")) {
g_free (stream->media_groups[GST_HLS_RENDITION_STREAM_TYPE_AUDIO]);
stream->media_groups[GST_HLS_RENDITION_STREAM_TYPE_AUDIO] =
gst_m3u8_unquote (v);
} else if (g_str_equal (a, "SUBTITLES")) {
g_free (stream->media_groups[GST_HLS_RENDITION_STREAM_TYPE_SUBTITLES]);
stream->media_groups[GST_HLS_RENDITION_STREAM_TYPE_SUBTITLES] =
gst_m3u8_unquote (v);
} else if (g_str_equal (a, "VIDEO")) {
g_free (stream->media_groups[GST_HLS_RENDITION_STREAM_TYPE_VIDEO]);
stream->media_groups[GST_HLS_RENDITION_STREAM_TYPE_VIDEO] =
gst_m3u8_unquote (v);
} else if (g_str_equal (a, "CLOSED-CAPTIONS")) {
/* closed captions will be embedded inside the video stream, ignore */
}
}
return stream;
}
static gchar *
generate_variant_stream_name (gchar * uri, gint bandwidth)
{
gchar *checksum = g_compute_checksum_for_string (G_CHECKSUM_SHA1, uri, -1);
gchar *res = g_strdup_printf ("variant-%dbps-%s", bandwidth, checksum);
g_free (checksum);
return res;
}
static GstHLSVariantStream *
find_variant_stream_by_name (GList * list, const gchar * name)
{
for (; list != NULL; list = list->next) {
GstHLSVariantStream *variant_stream = list->data;
if (variant_stream->name != NULL && !strcmp (variant_stream->name, name))
return variant_stream;
}
return NULL;
}
static GstHLSVariantStream *
find_variant_stream_by_uri (GList * list, const gchar * uri)
{
for (; list != NULL; list = list->next) {
GstHLSVariantStream *variant_stream = list->data;
if (variant_stream->uri != NULL && !strcmp (variant_stream->uri, uri))
return variant_stream;
}
return NULL;
}
static GstHLSVariantStream *
find_variant_stream_for_fallback (GList * list, GstHLSVariantStream * fallback)
{
for (; list != NULL; list = list->next) {
GstHLSVariantStream *variant_stream = list->data;
if (variant_stream->bandwidth == fallback->bandwidth &&
variant_stream->width == fallback->width &&
variant_stream->height == fallback->height &&
variant_stream->iframe == fallback->iframe &&
!g_strcmp0 (variant_stream->codecs, fallback->codecs))
return variant_stream;
}
return NULL;
}
static GstHLSMasterPlaylist *
gst_hls_master_playlist_new (void)
{
GstHLSMasterPlaylist *playlist;
playlist = g_new0 (GstHLSMasterPlaylist, 1);
playlist->refcount = 1;
playlist->is_simple = FALSE;
return playlist;
}
void
hls_master_playlist_unref (GstHLSMasterPlaylist * playlist)
{
if (g_atomic_int_dec_and_test (&playlist->refcount)) {
g_list_free_full (playlist->renditions,
(GDestroyNotify) gst_hls_rendition_stream_unref);
g_list_free_full (playlist->variants,
(GDestroyNotify) gst_hls_variant_stream_unref);
g_list_free_full (playlist->iframe_variants,
(GDestroyNotify) gst_hls_variant_stream_unref);
if (playlist->default_variant)
gst_hls_variant_stream_unref (playlist->default_variant);
g_free (playlist->last_data);
g_free (playlist);
}
}
static gint
hls_media_compare_func (GstHLSRenditionStream * ma, GstHLSRenditionStream * mb)
{
if (ma->mtype != mb->mtype)
return ma->mtype - mb->mtype;
return strcmp (ma->name, mb->name) || strcmp (ma->group_id, mb->group_id);
}
static GstCaps *
stream_get_media_caps (GstHLSVariantStream * stream,
GstHLSRenditionStreamType mtype)
{
GstStructure *st = NULL;
GstCaps *ret;
guint i, nb;
if (stream->caps == NULL)
return NULL;
nb = gst_caps_get_size (stream->caps);
for (i = 0; i < nb; i++) {
GstStructure *cand = gst_caps_get_structure (stream->caps, i);
const gchar *name = gst_structure_get_name (cand);
gboolean matched;
switch (mtype) {
case GST_HLS_RENDITION_STREAM_TYPE_AUDIO:
matched = g_str_has_prefix (name, "audio/");
break;
case GST_HLS_RENDITION_STREAM_TYPE_VIDEO:
matched = g_str_has_prefix (name, "video/");
break;
case GST_HLS_RENDITION_STREAM_TYPE_SUBTITLES:
matched = g_str_has_prefix (name, "application/x-subtitle");
break;
default:
matched = FALSE;
break;
}
if (!matched)
continue;
if (st) {
GST_WARNING ("More than one caps for the same type, can't match");
return NULL;
}
st = cand;
}
if (!st)
return NULL;
ret = gst_caps_new_empty ();
gst_caps_append_structure (ret, gst_structure_copy (st));
return ret;
}
static gint
gst_hls_variant_stream_compare_by_bitrate (gconstpointer a, gconstpointer b)
{
const GstHLSVariantStream *vs_a = (const GstHLSVariantStream *) a;
const GstHLSVariantStream *vs_b = (const GstHLSVariantStream *) b;
if (vs_a->bandwidth == vs_b->bandwidth)
return g_strcmp0 (vs_a->name, vs_b->name);
return vs_a->bandwidth - vs_b->bandwidth;
}
/**
* gst_hls_master_playlist_new_from_data:
* @data: (transfer full): The manifest to parse
* @base_uri: The URI of the manifest
*
* Parse the provided manifest and construct the master playlist.
*
* Returns: The parse GstHLSMasterPlaylist , or NULL if there was an error.
*/
GstHLSMasterPlaylist *
hls_master_playlist_new_from_data (gchar * data, const gchar * base_uri)
{
GstHLSMasterPlaylist *playlist;
GstHLSVariantStream *pending_stream, *existing_stream;
gchar *end, *free_data = data;
gint val;
GList *tmp;
GstStreamType most_seen_types = 0;
if (!g_str_has_prefix (data, "#EXTM3U")) {
GST_WARNING ("Data doesn't start with #EXTM3U");
g_free (free_data);
return NULL;
}
playlist = gst_hls_master_playlist_new ();
/* store data before we modify it for parsing */
playlist->last_data = g_strdup (data);
GST_TRACE ("data:\n%s", data);
/* Detect early whether this manifest describes a simple media playlist or
* not */
if (strstr (data, "\n#EXTINF:") != NULL) {
GST_INFO ("This is a simple media playlist, not a master playlist");
pending_stream = gst_hls_variant_stream_new ();
pending_stream->name = g_strdup ("media-playlist");
pending_stream->uri = g_strdup (base_uri);
playlist->variants = g_list_append (playlist->variants, pending_stream);
playlist->default_variant = gst_hls_variant_stream_ref (pending_stream);
playlist->is_simple = TRUE;
return playlist;
}
/* Beginning of the actual master playlist parsing */
pending_stream = NULL;
data += 7;
while (TRUE) {
gchar *r;
end = g_utf8_strchr (data, -1, '\n');
if (end)
*end = '\0';
r = g_utf8_strchr (data, -1, '\r');
if (r)
*r = '\0';
if (data[0] != '#' && data[0] != '\0') {
gchar *name, *uri;
if (pending_stream == NULL) {
GST_LOG ("%s: got non-empty line without EXT-STREAM-INF, dropping",
data);
goto next_line;
}
uri = uri_join (base_uri, data);
if (uri == NULL)
goto next_line;
pending_stream->name = name =
generate_variant_stream_name (uri, pending_stream->bandwidth);
pending_stream->uri = uri;
if (find_variant_stream_by_name (playlist->variants, name)
|| find_variant_stream_by_uri (playlist->variants, uri)) {
GST_DEBUG ("Already have a list with this name or URI: %s", name);
gst_hls_variant_stream_unref (pending_stream);
} else if ((existing_stream =
find_variant_stream_for_fallback (playlist->variants,
pending_stream))) {
GST_DEBUG ("Adding to %s fallback URI %s", existing_stream->name,
pending_stream->uri);
existing_stream->fallback =
g_list_append (existing_stream->fallback,
g_strdup (pending_stream->uri));
gst_hls_variant_stream_unref (pending_stream);
} else {
GST_INFO ("stream %s @ %u: %s", name, pending_stream->bandwidth, uri);
playlist->variants = g_list_append (playlist->variants, pending_stream);
/* use first stream in the playlist as default */
if (playlist->default_variant == NULL) {
playlist->default_variant =
gst_hls_variant_stream_ref (pending_stream);
}
}
pending_stream = NULL;
} else if (g_str_has_prefix (data, "#EXT-X-VERSION:")) {
if (int_from_string (data + 15, &data, &val))
playlist->version = val;
} else if (g_str_has_prefix (data, "#EXT-X-STREAM-INF:") ||
g_str_has_prefix (data, "#EXT-X-I-FRAME-STREAM-INF:")) {
GstHLSVariantStream *stream = gst_hls_variant_parse (data, base_uri);
if (stream->iframe) {
if (find_variant_stream_by_uri (playlist->iframe_variants, stream->uri)) {
GST_DEBUG ("Already have a list with this URI");
gst_hls_variant_stream_unref (stream);
} else {
playlist->iframe_variants =
g_list_append (playlist->iframe_variants, stream);
}
} else {
if (pending_stream != NULL) {
GST_WARNING ("variant stream without uri, dropping");
gst_hls_variant_stream_unref (pending_stream);
}
pending_stream = stream;
}
} else if (g_str_has_prefix (data, "#EXT-X-MEDIA:")) {
GstHLSRenditionStream *media;
media = gst_m3u8_parse_media (data + strlen ("#EXT-X-MEDIA:"), base_uri);
if (media == NULL)
goto next_line;
if (g_list_find_custom (playlist->renditions, media,
(GCompareFunc) hls_media_compare_func)) {
GST_DEBUG ("Dropping duplicate alternate rendition group : %s", data);
gst_hls_rendition_stream_unref (media);
goto next_line;
}
playlist->renditions = g_list_append (playlist->renditions, media);
GST_INFO ("Stored media %s / group %s", media->name, media->group_id);
} else if (*data != '\0') {
GST_LOG ("Ignored line: %s", data);
}
next_line:
if (!end)
break;
data = g_utf8_next_char (end); /* skip \n */
}
if (pending_stream != NULL) {
GST_WARNING ("#EXT-X-STREAM-INF without uri, dropping");
gst_hls_variant_stream_unref (pending_stream);
}
g_free (free_data);
if (playlist->variants == NULL) {
GST_WARNING ("Master playlist without any media playlists!");
gst_hls_master_playlist_unref (playlist);
return NULL;
}
/* reorder variants by bitrate */
playlist->variants =
g_list_sort (playlist->variants,
(GCompareFunc) gst_hls_variant_stream_compare_by_bitrate);
playlist->iframe_variants =
g_list_sort (playlist->iframe_variants,
(GCompareFunc) gst_hls_variant_stream_compare_by_bitrate);
#ifndef GST_DISABLE_GST_DEBUG
/* Sanity check : If there are no codecs, a stream shouldn't point to
* alternate rendition groups.
*
* Write a warning to help with further debugging if this causes issues
* later */
for (tmp = playlist->variants; tmp; tmp = tmp->next) {
GstHLSVariantStream *stream = tmp->data;
if (stream->codecs == NULL) {
if (stream->media_groups[0] || stream->media_groups[1]
|| stream->media_groups[2] || stream->media_groups[3]) {
GST_WARNING
("Variant specifies alternate rendition groups but has no codecs specified");
}
}
}
#endif
/* Filter out audio-only variants from audio+video stream */
for (tmp = playlist->variants; tmp; tmp = tmp->next) {
GstHLSVariantStream *stream = tmp->data;
most_seen_types |= stream->codecs_stream_type;
}
/* Flag the playlist to indicate whether all codecs are known or not on variants */
playlist->have_codecs = most_seen_types != 0;
GST_DEBUG ("have_codecs:%d most_seen_types:%d", playlist->have_codecs,
most_seen_types);
/* Filter out audio-only variants from audio+video stream */
if (playlist->have_codecs && most_seen_types != GST_STREAM_TYPE_AUDIO) {
tmp = playlist->variants;
while (tmp) {
GstHLSVariantStream *stream = tmp->data;
if (stream->codecs_stream_type != most_seen_types &&
stream->codecs_stream_type == GST_STREAM_TYPE_AUDIO) {
GST_DEBUG ("Remove variant with partial stream types %s", stream->name);
tmp = playlist->variants = g_list_remove (playlist->variants, stream);
gst_hls_variant_stream_unref (stream);
} else
tmp = tmp->next;
}
}
if (playlist->renditions) {
guint i;
/* Assign information from variants to alternate rendition groups. Note that
* at this point we know that there are caps present on the variants */
for (tmp = playlist->variants; tmp; tmp = tmp->next) {
GstHLSVariantStream *stream = tmp->data;
GST_DEBUG ("Post-processing Variant Stream '%s'", stream->name);
for (i = 0; i < GST_HLS_N_MEDIA_TYPES; ++i) {
gchar *alt_rend_group = stream->media_groups[i];
if (alt_rend_group) {
gboolean alt_in_variant = FALSE;
GstCaps *media_caps = stream_get_media_caps (stream, i);
GList *altlist;
if (!media_caps)
continue;
for (altlist = playlist->renditions; altlist; altlist = altlist->next) {
GstHLSRenditionStream *media = altlist->data;
if (media->mtype != i
|| g_strcmp0 (media->group_id, alt_rend_group))
continue;
GST_DEBUG (" %s caps:%" GST_PTR_FORMAT " media %s, uri: %s",
GST_HLS_RENDITION_STREAM_TYPE_NAME (i), media_caps, media->name,
media->uri);
if (media->uri == NULL) {
GST_DEBUG (" Media is present in main variant stream");
alt_in_variant = TRUE;
} else {
/* Assign caps to media */
if (media->caps && !gst_caps_is_equal (media->caps, media_caps)) {
GST_ERROR (" Media already has different caps %"
GST_PTR_FORMAT, media->caps);
} else {
GST_DEBUG (" Assigning caps %" GST_PTR_FORMAT, media_caps);
gst_caps_replace (&media->caps, media_caps);
}
}
}
if (!alt_in_variant) {
GstCaps *new_caps = gst_caps_subtract (stream->caps, media_caps);
gst_caps_replace (&stream->caps, new_caps);
gst_caps_unref (new_caps);
}
gst_caps_unref (media_caps);
}
}
GST_DEBUG ("Stream Ends up with caps %" GST_PTR_FORMAT, stream->caps);
}
}
GST_DEBUG
("parsed master playlist with %d streams, %d I-frame streams and %d alternative rendition groups",
g_list_length (playlist->variants),
g_list_length (playlist->iframe_variants),
g_list_length (playlist->renditions));
return playlist;
}
GstHLSVariantStream *
hls_master_playlist_get_variant_for_bitrate (GstHLSMasterPlaylist *
playlist, GstHLSVariantStream * current_variant, guint bitrate,
guint min_bitrate)
{
GstHLSVariantStream *variant = current_variant;
GstHLSVariantStream *variant_by_min = current_variant;
GList *l;
/* variant lists are sorted low to high, so iterate from highest to lowest */
if (current_variant == NULL || !current_variant->iframe)
l = g_list_last (playlist->variants);
else
l = g_list_last (playlist->iframe_variants);
while (l != NULL) {
variant = l->data;
if (variant->bandwidth >= min_bitrate)
variant_by_min = variant;
if (variant->bandwidth <= bitrate)
break;
l = l->prev;
}
/* If variant bitrate is above the min_bitrate (or min_bitrate == 0)
* return it now */
if (variant && variant->bandwidth >= min_bitrate)
return variant;
/* Otherwise, return the last (lowest bitrate) variant we saw that
* was higher than the min_bitrate */
return variant_by_min;
}
static gboolean
remove_uncommon (GQuark field_id, GValue * value, GstStructure * st2)
{
const GValue *other;
GValue dest = G_VALUE_INIT;
other = gst_structure_id_get_value (st2, field_id);
if (other == NULL || (G_VALUE_TYPE (value) != G_VALUE_TYPE (other)))
return FALSE;
if (!gst_value_intersect (&dest, value, other))
return FALSE;
g_value_reset (value);
g_value_copy (&dest, value);
g_value_reset (&dest);
return TRUE;
}
/* Merge all common structures from caps1 and caps2
*
* Returns empty caps if a structure is not present in both */
static GstCaps *
gst_caps_merge_common (GstCaps * caps1, GstCaps * caps2)
{
guint it1, it2;
GstCaps *res = gst_caps_new_empty ();
for (it1 = 0; it1 < gst_caps_get_size (caps1); it1++) {
GstStructure *st1 = gst_caps_get_structure (caps1, it1);
GstStructure *merged = NULL;
const gchar *name1 = gst_structure_get_name (st1);
for (it2 = 0; it2 < gst_caps_get_size (caps2); it2++) {
GstStructure *st2 = gst_caps_get_structure (caps2, it2);
if (gst_structure_has_name (st2, name1)) {
if (merged == NULL)
merged = gst_structure_copy (st1);
gst_structure_filter_and_map_in_place (merged,
(GstStructureFilterMapFunc) remove_uncommon, st2);
}
}
if (merged == NULL)
goto fail;
gst_caps_append_structure (res, merged);
}
return res;
fail:
{
GST_WARNING ("Failed to create common caps of %"
GST_PTR_FORMAT " and %" GST_PTR_FORMAT, caps1, caps2);
gst_caps_unref (res);
return NULL;
}
}
GstCaps *
hls_master_playlist_get_common_caps (GstHLSMasterPlaylist * playlist)
{
GList *tmp;
GstCaps *res = NULL;
for (tmp = playlist->variants; tmp; tmp = tmp->next) {
GstHLSVariantStream *stream = tmp->data;
GST_DEBUG ("stream caps %" GST_PTR_FORMAT, stream->caps);
if (!stream->caps) {
/* If one of the stream doesn't have *any* caps, we can't reliably return
* any common caps */
if (res)
gst_caps_unref (res);
res = NULL;
goto beach;
}
if (!res) {
res = gst_caps_copy (stream->caps);
} else {
GstCaps *common_caps = gst_caps_merge_common (res, stream->caps);
gst_caps_unref (res);
res = common_caps;
if (!res)
goto beach;
}
}
res = gst_caps_simplify (res);
beach:
GST_DEBUG ("Returning common caps %" GST_PTR_FORMAT, res);
return res;
}
GstStreamType
gst_stream_type_from_hls_type (GstHLSRenditionStreamType mtype)
{
switch (mtype) {
case GST_HLS_RENDITION_STREAM_TYPE_AUDIO:
return GST_STREAM_TYPE_AUDIO;
case GST_HLS_RENDITION_STREAM_TYPE_VIDEO:
return GST_STREAM_TYPE_VIDEO;
case GST_HLS_RENDITION_STREAM_TYPE_SUBTITLES:
return GST_STREAM_TYPE_TEXT;
default:
return GST_STREAM_TYPE_UNKNOWN;
}
}
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