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hls: m3u8: Parsing EXT-X-MAP tag to store initialization data

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EXT-X-MAP tag informs media initialization data,
such as moov box in ISOBMFF case and PAT/PMT for MPEG TS stream.

https://bugzilla.gnome.org/show_bug.cgi?id=776928
This commit is contained in:
Seungha Yang 2017-11-04 20:15:33 +09:00 committed by Sebastian Dröge
parent b45dd51fb1
commit f9dc67c372
2 changed files with 91 additions and 0 deletions
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82
ext/hls/m3u8.c
View file

@ -33,6 +33,7 @@
static GstM3U8MediaFile *gst_m3u8_media_file_new (gchar * uri,
gchar * title, GstClockTime duration, guint sequence);
static void gst_m3u8_init_file_unref (GstM3U8InitFile * self);
static gchar *uri_join (const gchar * uri, const gchar * path);
GstM3U8 *
@ -144,6 +145,8 @@ gst_m3u8_media_file_unref (GstM3U8MediaFile * 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);
@ -151,6 +154,38 @@ gst_m3u8_media_file_unref (GstM3U8MediaFile * 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)
{
@ -458,6 +493,7 @@ gst_m3u8_update (GstM3U8 * self, gchar * data)
gint64 mediasequence;
GList *previous_files = NULL;
gboolean have_mediasequence = FALSE;
GstM3U8InitFile *last_init_file = NULL;
g_return_val_if_fail (self != NULL, FALSE);
g_return_val_if_fail (data != NULL, FALSE);
@ -555,6 +591,8 @@ gst_m3u8_update (GstM3U8 * self, gchar * data)
}
file->discont = discontinuity;
if (last_init_file)
file->init_file = gst_m3u8_init_file_ref (last_init_file);
duration = 0;
title = NULL;
@ -672,6 +710,47 @@ gst_m3u8_update (GstM3U8 * self, gchar * data)
} 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);
}
@ -690,6 +769,9 @@ gst_m3u8_update (GstM3U8 * self, gchar * data)
self->files = g_list_reverse (self->files);
if (last_init_file)
gst_m3u8_init_file_unref (last_init_file);
if (previous_files) {
gboolean consistent = TRUE;

9
ext/hls/m3u8.h
View file

@ -30,6 +30,7 @@ G_BEGIN_DECLS
typedef struct _GstM3U8 GstM3U8;
typedef struct _GstM3U8MediaFile GstM3U8MediaFile;
typedef struct _GstM3U8InitFile GstM3U8InitFile;
typedef struct _GstHLSMedia GstHLSMedia;
typedef struct _GstM3U8Client GstM3U8Client;
typedef struct _GstHLSVariantStream GstHLSVariantStream;
@ -99,6 +100,14 @@ struct _GstM3U8MediaFile
guint8 iv[16];
gint64 offset, size;
gint ref_count; /* ATOMIC */
GstM3U8InitFile *init_file; /* Media Initialization (hold ref) */
};
struct _GstM3U8InitFile
{
gchar *uri;
gint64 offset, size;
guint ref_count; /* ATOMIC */
};
GstM3U8MediaFile * gst_m3u8_media_file_ref (GstM3U8MediaFile * mfile);