--- /dev/null
+/* GStreamer
+ *
+ * Copyright (C) 2007 Rene Stadler <mail@renestadler.de>
+ * Copyright (C) 2007-2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ *
+ * 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "gstgiobasesrc.h"
+
+#include <gst/base/gsttypefindhelper.h>
+
+GST_DEBUG_CATEGORY_STATIC (gst_gio_base_src_debug);
+#define GST_CAT_DEFAULT gst_gio_base_src_debug
+
+static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS_ANY);
+
+GST_BOILERPLATE (GstGioBaseSrc, gst_gio_base_src, GstBaseSrc,
+ GST_TYPE_BASE_SRC);
+
+static void gst_gio_base_src_finalize (GObject * object);
+
+static gboolean gst_gio_base_src_start (GstBaseSrc * base_src);
+static gboolean gst_gio_base_src_stop (GstBaseSrc * base_src);
+static gboolean gst_gio_base_src_get_size (GstBaseSrc * base_src,
+ guint64 * size);
+static gboolean gst_gio_base_src_is_seekable (GstBaseSrc * base_src);
+static gboolean gst_gio_base_src_unlock (GstBaseSrc * base_src);
+static gboolean gst_gio_base_src_unlock_stop (GstBaseSrc * base_src);
+static gboolean gst_gio_base_src_check_get_range (GstBaseSrc * base_src);
+static GstFlowReturn gst_gio_base_src_create (GstBaseSrc * base_src,
+ guint64 offset, guint size, GstBuffer ** buf);
+static gboolean gst_gio_base_src_query (GstBaseSrc * base_src,
+ GstQuery * query);
+
+static void
+gst_gio_base_src_base_init (gpointer gclass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);
+
+ GST_DEBUG_CATEGORY_INIT (gst_gio_base_src_debug, "gio_base_src", 0,
+ "GIO base source");
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&src_factory));
+}
+
+static void
+gst_gio_base_src_class_init (GstGioBaseSrcClass * klass)
+{
+ GObjectClass *gobject_class = (GObjectClass *) klass;
+ GstBaseSrcClass *gstbasesrc_class = (GstBaseSrcClass *) klass;
+
+ gobject_class->finalize = gst_gio_base_src_finalize;
+
+ gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_gio_base_src_start);
+ gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_gio_base_src_stop);
+ gstbasesrc_class->get_size = GST_DEBUG_FUNCPTR (gst_gio_base_src_get_size);
+ gstbasesrc_class->is_seekable =
+ GST_DEBUG_FUNCPTR (gst_gio_base_src_is_seekable);
+ gstbasesrc_class->unlock = GST_DEBUG_FUNCPTR (gst_gio_base_src_unlock);
+ gstbasesrc_class->unlock_stop =
+ GST_DEBUG_FUNCPTR (gst_gio_base_src_unlock_stop);
+ gstbasesrc_class->check_get_range =
+ GST_DEBUG_FUNCPTR (gst_gio_base_src_check_get_range);
+ gstbasesrc_class->create = GST_DEBUG_FUNCPTR (gst_gio_base_src_create);
+ gstbasesrc_class->query = GST_DEBUG_FUNCPTR (gst_gio_base_src_query);
+}
+
+static void
+gst_gio_base_src_init (GstGioBaseSrc * src, GstGioBaseSrcClass * gclass)
+{
+ src->cancel = g_cancellable_new ();
+}
+
+static void
+gst_gio_base_src_finalize (GObject * object)
+{
+ GstGioBaseSrc *src = GST_GIO_BASE_SRC (object);
+
+ if (src->cancel) {
+ g_object_unref (src->cancel);
+ src->cancel = NULL;
+ }
+
+ if (src->stream) {
+ g_object_unref (src->stream);
+ src->stream = NULL;
+ }
+
+ if (src->cache) {
+ gst_buffer_unref (src->cache);
+ src->cache = NULL;
+ }
+
+ GST_CALL_PARENT (G_OBJECT_CLASS, finalize, (object));
+}
+
+static gboolean
+gst_gio_base_src_start (GstBaseSrc * base_src)
+{
+ GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
+ GstGioBaseSrcClass *gbsrc_class = GST_GIO_BASE_SRC_GET_CLASS (src);
+
+ src->position = 0;
+
+ /* FIXME: This will likely block */
+ src->stream = gbsrc_class->get_stream (src);
+ if (G_UNLIKELY (!G_IS_INPUT_STREAM (src->stream))) {
+ GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
+ ("No input stream provided by subclass"));
+ return FALSE;
+ } else if (G_UNLIKELY (g_input_stream_is_closed (src->stream))) {
+ GST_ELEMENT_ERROR (src, LIBRARY, FAILED, (NULL),
+ ("Input stream is already closed"));
+ return FALSE;
+ }
+
+ if (G_IS_SEEKABLE (src->stream))
+ src->position = g_seekable_tell (G_SEEKABLE (src->stream));
+
+ GST_DEBUG_OBJECT (src, "started source");
+
+ return TRUE;
+}
+
+static gboolean
+gst_gio_base_src_stop (GstBaseSrc * base_src)
+{
+ GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
+ GstGioBaseSrcClass *klass = GST_GIO_BASE_SRC_GET_CLASS (src);
+ gboolean success;
+ GError *err = NULL;
+
+ if (klass->close_on_stop && G_IS_INPUT_STREAM (src->stream)) {
+ GST_DEBUG_OBJECT (src, "closing stream");
+
+ /* FIXME: can block but unfortunately we can't use async operations
+ * here because they require a running main loop */
+ success = g_input_stream_close (src->stream, src->cancel, &err);
+
+ if (!success && !gst_gio_error (src, "g_input_stream_close", &err, NULL)) {
+ GST_ELEMENT_WARNING (src, RESOURCE, CLOSE, (NULL),
+ ("g_input_stream_close failed: %s", err->message));
+ g_clear_error (&err);
+ } else if (!success) {
+ GST_ELEMENT_WARNING (src, RESOURCE, CLOSE, (NULL),
+ ("g_input_stream_close failed"));
+ } else {
+ GST_DEBUG_OBJECT (src, "g_input_stream_close succeeded");
+ }
+
+ g_object_unref (src->stream);
+ src->stream = NULL;
+ } else {
+ g_object_unref (src->stream);
+ src->stream = NULL;
+ }
+
+ return TRUE;
+}
+
+static gboolean
+gst_gio_base_src_get_size (GstBaseSrc * base_src, guint64 * size)
+{
+ GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
+
+ if (G_IS_FILE_INPUT_STREAM (src->stream)) {
+ GFileInfo *info;
+ GError *err = NULL;
+
+ info = g_file_input_stream_query_info (G_FILE_INPUT_STREAM (src->stream),
+ G_FILE_ATTRIBUTE_STANDARD_SIZE, src->cancel, &err);
+
+ if (info != NULL) {
+ *size = g_file_info_get_size (info);
+ g_object_unref (info);
+ GST_DEBUG_OBJECT (src, "found size: %" G_GUINT64_FORMAT, *size);
+ return TRUE;
+ }
+
+ if (!gst_gio_error (src, "g_file_input_stream_query_info", &err, NULL)) {
+
+ if (GST_GIO_ERROR_MATCHES (err, NOT_SUPPORTED))
+ GST_DEBUG_OBJECT (src, "size information not available");
+ else
+ GST_WARNING_OBJECT (src, "size information retrieval failed: %s",
+ err->message);
+
+ g_clear_error (&err);
+ }
+ }
+
+ if (GST_GIO_STREAM_IS_SEEKABLE (src->stream)) {
+ goffset old;
+ goffset stream_size;
+ gboolean ret;
+ GSeekable *seekable = G_SEEKABLE (src->stream);
+ GError *err = NULL;
+
+ old = g_seekable_tell (seekable);
+
+ ret = g_seekable_seek (seekable, 0, G_SEEK_END, src->cancel, &err);
+ if (!ret) {
+ if (!gst_gio_error (src, "g_seekable_seek", &err, NULL)) {
+ if (GST_GIO_ERROR_MATCHES (err, NOT_SUPPORTED))
+ GST_DEBUG_OBJECT (src,
+ "Seeking to the end of stream is not supported");
+ else
+ GST_WARNING_OBJECT (src, "Seeking to end of stream failed: %s",
+ err->message);
+ g_clear_error (&err);
+ } else {
+ GST_WARNING_OBJECT (src, "Seeking to end of stream failed");
+ }
+ return FALSE;
+ }
+
+ stream_size = g_seekable_tell (seekable);
+
+ ret = g_seekable_seek (seekable, old, G_SEEK_SET, src->cancel, &err);
+ if (!ret) {
+ if (!gst_gio_error (src, "g_seekable_seek", &err, NULL)) {
+ if (GST_GIO_ERROR_MATCHES (err, NOT_SUPPORTED))
+ GST_ERROR_OBJECT (src, "Seeking to the old position not supported");
+ else
+ GST_ERROR_OBJECT (src, "Seeking to the old position failed: %s",
+ err->message);
+ g_clear_error (&err);
+ } else {
+ GST_ERROR_OBJECT (src, "Seeking to the old position faile");
+ }
+ return FALSE;
+ }
+
+ if (stream_size >= 0) {
+ *size = stream_size;
+ return TRUE;
+ }
+ }
+
+ return FALSE;
+}
+
+static gboolean
+gst_gio_base_src_is_seekable (GstBaseSrc * base_src)
+{
+ GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
+ gboolean seekable;
+
+ seekable = GST_GIO_STREAM_IS_SEEKABLE (src->stream);
+
+ GST_DEBUG_OBJECT (src, "can seek: %d", seekable);
+
+ return seekable;
+}
+
+static gboolean
+gst_gio_base_src_unlock (GstBaseSrc * base_src)
+{
+ GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
+
+ GST_LOG_OBJECT (src, "triggering cancellation");
+
+ g_cancellable_cancel (src->cancel);
+
+ return TRUE;
+}
+
+static gboolean
+gst_gio_base_src_unlock_stop (GstBaseSrc * base_src)
+{
+ GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
+
+ GST_LOG_OBJECT (src, "resetting cancellable");
+
+ g_cancellable_reset (src->cancel);
+
+ return TRUE;
+}
+
+static gboolean
+gst_gio_base_src_check_get_range (GstBaseSrc * base_src)
+{
+ return GST_CALL_PARENT_WITH_DEFAULT (GST_BASE_SRC_CLASS,
+ check_get_range, (base_src), FALSE);
+}
+
+static GstFlowReturn
+gst_gio_base_src_create (GstBaseSrc * base_src, guint64 offset, guint size,
+ GstBuffer ** buf_return)
+{
+ GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
+ GstBuffer *buf;
+ GstFlowReturn ret = GST_FLOW_OK;
+
+ g_return_val_if_fail (G_IS_INPUT_STREAM (src->stream), GST_FLOW_ERROR);
+
+ /* If we have the requested part in our cache take a subbuffer of that,
+ * otherwise fill the cache again with at least 4096 bytes from the
+ * requested offset and return a subbuffer of that.
+ *
+ * We need caching because every read/seek operation will need to go
+ * over DBus if our backend is GVfs and this is painfully slow. */
+ if (src->cache && offset >= GST_BUFFER_OFFSET (src->cache) &&
+ offset + size <= GST_BUFFER_OFFSET_END (src->cache)) {
+ GST_DEBUG_OBJECT (src, "Creating subbuffer from cached buffer: offset %"
+ G_GUINT64_FORMAT " length %u", offset, size);
+
+ buf = gst_buffer_create_sub (src->cache,
+ offset - GST_BUFFER_OFFSET (src->cache), size);
+
+ GST_BUFFER_OFFSET (buf) = offset;
+ GST_BUFFER_OFFSET_END (buf) = offset + size;
+ GST_BUFFER_SIZE (buf) = size;
+ } else {
+ guint cachesize = MAX (4096, size);
+ gssize read, res;
+ gboolean success, eos;
+ GError *err = NULL;
+
+ if (src->cache) {
+ gst_buffer_unref (src->cache);
+ src->cache = NULL;
+ }
+
+ if (G_UNLIKELY (offset != src->position)) {
+ if (!GST_GIO_STREAM_IS_SEEKABLE (src->stream))
+ return GST_FLOW_NOT_SUPPORTED;
+
+ GST_DEBUG_OBJECT (src, "Seeking to position %" G_GUINT64_FORMAT, offset);
+ ret = gst_gio_seek (src, G_SEEKABLE (src->stream), offset, src->cancel);
+
+ if (ret == GST_FLOW_OK)
+ src->position = offset;
+ else
+ return ret;
+ }
+
+ src->cache = gst_buffer_try_new_and_alloc (cachesize);
+ if (G_UNLIKELY (src->cache == NULL)) {
+ GST_ERROR_OBJECT (src, "Failed to allocate %u bytes", cachesize);
+ return GST_FLOW_ERROR;
+ }
+
+ GST_LOG_OBJECT (src, "Reading %u bytes from offset %" G_GUINT64_FORMAT,
+ cachesize, offset);
+
+ /* GIO sometimes gives less bytes than requested although
+ * it's not at the end of file. SMB for example only
+ * supports reads up to 64k. So we loop here until we get at
+ * at least the requested amount of bytes or a read returns
+ * nothing. */
+ read = 0;
+ while (size - read > 0 && (res =
+ g_input_stream_read (G_INPUT_STREAM (src->stream),
+ GST_BUFFER_DATA (src->cache) + read, cachesize - read,
+ src->cancel, &err)) > 0) {
+ read += res;
+ }
+
+ success = (read >= 0);
+ eos = (cachesize > 0 && read == 0);
+
+ if (!success && !gst_gio_error (src, "g_input_stream_read", &err, &ret)) {
+ GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
+ ("Could not read from stream: %s", err->message));
+ g_clear_error (&err);
+ }
+
+ if (success && !eos) {
+ src->position += read;
+ GST_BUFFER_SIZE (src->cache) = read;
+
+ GST_BUFFER_OFFSET (src->cache) = offset;
+ GST_BUFFER_OFFSET_END (src->cache) = offset + read;
+
+ GST_DEBUG_OBJECT (src, "Read successful");
+ GST_DEBUG_OBJECT (src, "Creating subbuffer from new "
+ "cached buffer: offset %" G_GUINT64_FORMAT " length %u", offset,
+ size);
+
+ buf = gst_buffer_create_sub (src->cache, 0, MIN (size, read));
+
+ GST_BUFFER_OFFSET (buf) = offset;
+ GST_BUFFER_OFFSET_END (buf) = offset + MIN (size, read);
+ GST_BUFFER_SIZE (buf) = MIN (size, read);
+ } else {
+ GST_DEBUG_OBJECT (src, "Read not successful");
+ gst_buffer_unref (src->cache);
+ src->cache = NULL;
+ buf = NULL;
+ }
+
+ if (eos)
+ ret = GST_FLOW_UNEXPECTED;
+ }
+
+ *buf_return = buf;
+
+ return ret;
+}
+
+static gboolean
+gst_gio_base_src_query (GstBaseSrc * base_src, GstQuery * query)
+{
+ gboolean ret = FALSE;
+ GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src);
+
+ switch (GST_QUERY_TYPE (query)) {
+ case GST_QUERY_URI:
+ if (GST_IS_URI_HANDLER (src)) {
+ const gchar *uri = gst_uri_handler_get_uri (GST_URI_HANDLER (src));
+ gst_query_set_uri (query, uri);
+ ret = TRUE;
+ }
+ break;
+ default:
+ ret = FALSE;
+ break;
+ }
+
+ if (!ret)
+ ret = GST_BASE_SRC_CLASS (parent_class)->query (base_src, query);
+
+ return ret;
+}
projects / mafwsubrenderer / blobdiff