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Code Issues 1 Projects Releases Wiki Activity

uridownloader: add support for range based downloads

Browse source 
Adds a new API gst_uri_downloader_fetch_uri_with_range that allows
downloading only a byte range from an URI. It uses a seek event
sent to the source to signal the range to be downloaded.

https://bugzilla.gnome.org/show_bug.cgi?id=702206
This commit is contained in:
Thiago Santos 2013-06-19 18:28:15 -03:00
parent 65758debf1
commit e76f3e95fd
2 changed files with 47 additions and 2 deletions
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48
gst-libs/gst/uridownloader/gsturidownloader.c
View file

@ -320,6 +320,24 @@ gst_uri_downloader_cancel (GstUriDownloader * downloader)
}
}
static gboolean
gst_uri_downloader_set_range (GstUriDownloader * downloader,
gint64 range_start, gint64 range_end)
{
g_return_val_if_fail (range_start >= 0, FALSE);
g_return_val_if_fail (range_end >= -1, FALSE);
if (range_start || (range_end >= 0)) {
GstEvent *seek;
seek = gst_event_new_seek (1.0, GST_FORMAT_BYTES, GST_SEEK_FLAG_FLUSH,
GST_SEEK_TYPE_SET, range_start, GST_SEEK_TYPE_SET, range_end);
return gst_element_send_event (downloader->priv->urisrc, seek);
}
return TRUE;
}
static gboolean
gst_uri_downloader_set_uri (GstUriDownloader * downloader, const gchar * uri)
{
@ -352,6 +370,22 @@ gst_uri_downloader_set_uri (GstUriDownloader * downloader, const gchar * uri)
GstFragment *
gst_uri_downloader_fetch_uri (GstUriDownloader * downloader, const gchar * uri)
{
return gst_uri_downloader_fetch_uri_with_range (downloader, uri, 0, -1);
}
/**
* gst_uri_downloader_fetch_uri_with_range:
* @downloader: the #GstUriDownloader
* @uri: the uri
* @range_start: the starting byte index
* @range_end: the final byte index, use -1 for unspecified
*
* Returns the downloaded #GstFragment
*/
GstFragment *
gst_uri_downloader_fetch_uri_with_range (GstUriDownloader * downloader,
const gchar * uri, gint64 range_start, gint64 range_end)
{
GstStateChangeReturn ret;
GstFragment *download = NULL;
@ -363,12 +397,22 @@ gst_uri_downloader_fetch_uri (GstUriDownloader * downloader, const gchar * uri)
}
if (!gst_uri_downloader_set_uri (downloader, uri)) {
GST_WARNING_OBJECT (downloader, "Failed to set URI");
goto quit;
}
gst_bus_set_flushing (downloader->priv->bus, FALSE);
ret = gst_element_set_state (downloader->priv->urisrc, GST_STATE_READY);
if (ret == GST_STATE_CHANGE_FAILURE) {
goto quit;
}
if (!gst_uri_downloader_set_range (downloader, range_start, range_end)) {
GST_WARNING_OBJECT (downloader, "Failed to set range");
goto quit;
}
downloader->priv->download = gst_fragment_new ();
gst_bus_set_flushing (downloader->priv->bus, FALSE);
ret = gst_element_set_state (downloader->priv->urisrc, GST_STATE_PLAYING);
if (ret == GST_STATE_CHANGE_FAILURE) {
g_object_unref (downloader->priv->download);

1
gst-libs/gst/uridownloader/gsturidownloader.h
View file

@ -57,6 +57,7 @@ GType gst_uri_downloader_get_type (void);
GstUriDownloader * gst_uri_downloader_new (void);
GstFragment * gst_uri_downloader_fetch_uri (GstUriDownloader * downloader, const gchar * uri);
GstFragment * gst_uri_downloader_fetch_uri_with_range (GstUriDownloader * downloader, const gchar * uri, gint64 range_start, gint64 range_end);
void gst_uri_downloader_reset (GstUriDownloader *downloader);
void gst_uri_downloader_cancel (GstUriDownloader *downloader);
void gst_uri_downloader_free (GstUriDownloader *downloader);