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hlsdemux: Implement parsing of #EXT-X-I-FRAME-STREAM-INF

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These are I-frame-only variant lists that can be used
for trick mode playback.
This commit is contained in:
Sebastian Dröge 2014-03-09 18:24:50 +01:00
parent 0f02311d13
commit 77231ab957
2 changed files with 66 additions and 18 deletions
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82
ext/hls/m3u8.c
View file

@ -75,6 +75,8 @@ gst_m3u8_free (GstM3U8 * self)
g_free (self->last_data);
g_list_foreach (self->lists, (GFunc) gst_m3u8_free, NULL);
g_list_free (self->lists);
g_list_foreach (self->iframe_lists, (GFunc) gst_m3u8_free, NULL);
g_list_free (self->iframe_lists);
g_free (self);
}
@ -383,38 +385,70 @@ gst_m3u8_update (GstM3U8 * self, gchar * data, gboolean * updated)
} 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-STREAM-INF:")) {
} else if (g_str_has_prefix (data, "#EXT-X-STREAM-INF:") ||
g_str_has_prefix (data, "#EXT-X-I-FRAME-STREAM-INF:")) {
gchar *v, *a;
gboolean iframe = g_str_has_prefix (data, "#EXT-X-I-FRAME-STREAM-INF:");
GstM3U8 *new_list;
if (list != NULL) {
GST_WARNING ("Found a list without a uri..., dropping");
gst_m3u8_free (list);
}
list = gst_m3u8_new ();
data = data + 18;
new_list = gst_m3u8_new ();
new_list->iframe = iframe;
data = data + (iframe ? 26 : 18);
while (data && parse_attributes (&data, &a, &v)) {
if (g_str_equal (a, "BANDWIDTH")) {
if (!int_from_string (v, NULL, &list->bandwidth))
if (!int_from_string (v, NULL, &new_list->bandwidth))
GST_WARNING ("Error while reading BANDWIDTH");
} else if (g_str_equal (a, "PROGRAM-ID")) {
if (!int_from_string (v, NULL, &list->program_id))
if (!int_from_string (v, NULL, &new_list->program_id))
GST_WARNING ("Error while reading PROGRAM-ID");
} else if (g_str_equal (a, "CODECS")) {
g_free (list->codecs);
list->codecs = g_strdup (v);
g_free (new_list->codecs);
new_list->codecs = g_strdup (v);
} else if (g_str_equal (a, "RESOLUTION")) {
if (!int_from_string (v, &v, &list->width))
if (!int_from_string (v, &v, &new_list->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, &list->height))
if (!int_from_string (v, NULL, &new_list->height))
GST_WARNING ("Error while reading RESOLUTION height");
}
} else if (iframe && g_str_equal (a, "URI")) {
gchar *uri = g_strdup (v);
gchar *urip = uri;
int len = strlen (uri);
/* handle the \"uri\" case */
if (uri[len - 1] == '"')
uri[len - 1] = '\0';
if (uri[0] == '"')
uri += 1;
data = uri_join (self->uri, uri);
g_free (urip);
if (data == NULL)
continue;
gst_m3u8_set_uri (new_list, data);
}
}
if (iframe) {
if (g_list_find_custom (self->iframe_lists, new_list->uri,
(GCompareFunc) _m3u8_compare_uri)) {
GST_DEBUG ("Already have a list with this URI");
gst_m3u8_free (new_list);
g_free (data);
} else {
self->iframe_lists = g_list_append (self->iframe_lists, new_list);
}
} else if (list != NULL) {
GST_WARNING ("Found a list without a uri..., dropping");
gst_m3u8_free (list);
} else {
list = new_list;
}
} else if (g_str_has_prefix (data, "#EXT-X-TARGETDURATION:")) {
if (int_from_string (data + 22, &data, &val))
self->targetduration = val * GST_SECOND;
@ -527,18 +561,30 @@ gst_m3u8_update (GstM3U8 * self, gchar * data, gboolean * updated)
/* redorder playlists by bitrate */
if (self->lists) {
gchar *top_variant_uri = NULL;
gboolean iframe = FALSE;
if (!self->current_variant)
if (!self->current_variant) {
top_variant_uri = GST_M3U8 (self->lists->data)->uri;
else
} else {
top_variant_uri = GST_M3U8 (self->current_variant->data)->uri;
iframe = GST_M3U8 (self->current_variant->data)->iframe;
}
self->lists =
g_list_sort (self->lists,
(GCompareFunc) gst_m3u8_compare_playlist_by_bitrate);
self->current_variant = g_list_find_custom (self->lists, top_variant_uri,
(GCompareFunc) _m3u8_compare_uri);
self->iframe_lists =
g_list_sort (self->iframe_lists,
(GCompareFunc) gst_m3u8_compare_playlist_by_bitrate);
if (iframe)
self->current_variant =
g_list_find_custom (self->iframe_lists, top_variant_uri,
(GCompareFunc) _m3u8_compare_uri);
else
self->current_variant = g_list_find_custom (self->lists, top_variant_uri,
(GCompareFunc) _m3u8_compare_uri);
}
return TRUE;

2
ext/hls/m3u8.h
View file

@ -50,11 +50,13 @@ struct _GstM3U8
gchar *codecs;
gint width;
gint height;
gboolean iframe;
GList *files;
/*< private > */
gchar *last_data;
GList *lists; /* list of GstM3U8 from the main playlist */
GList *iframe_lists; /* I-frame lists from the main playlist */
GList *current_variant; /* Current variant playlist used */
GstM3U8 *parent; /* main playlist (if any) */
guint mediasequence; /* EXT-X-MEDIA-SEQUENCE & increased with new media file */