diff options
Diffstat (limited to 'ext/gio/gstgiobasesrc.c')
| -rw-r--r-- | ext/gio/gstgiobasesrc.c | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/ext/gio/gstgiobasesrc.c b/ext/gio/gstgiobasesrc.c new file mode 100644 index 00000000..857b2a9c --- /dev/null +++ b/ext/gio/gstgiobasesrc.c @@ -0,0 +1,329 @@ +/* GStreamer + * + * Copyright (C) 2007 Rene Stadler <mail@renestadler.de> + * Copyright (C) 2007 Sebastian Dröge <slomo@circular-chaos.org> + * + * 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" + +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 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; + GstElementClass *gstelement_class; + GstBaseSrcClass *gstbasesrc_class; + + gobject_class = (GObjectClass *) klass; + gstelement_class = (GstElementClass *) klass; + 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); +} + +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; + } + + 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); + + if (!G_IS_INPUT_STREAM (src->stream)) { + GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), + ("No stream given yet")); + return FALSE; + } + + src->position = 0; + + GST_DEBUG_OBJECT (src, "started stream"); + + return TRUE; +} + +static gboolean +gst_gio_base_src_stop (GstBaseSrc * base_src) +{ + GstGioBaseSrc *src = GST_GIO_BASE_SRC (base_src); + gboolean success = TRUE; + GError *err = NULL; + + if (src->stream != NULL) { + /* FIXME: In case that the call below would block, there is no one to + * trigger the cancellation! */ + + success = g_input_stream_close (src->stream, src->cancel, &err); + + if (!success && !gst_gio_error (src, "g_input_stream_close", &err, NULL)) { + GST_ELEMENT_ERROR (src, RESOURCE, CLOSE, (NULL), + ("g_input_stream_close failed: %s", err->message)); + g_clear_error (&err); + } + + g_object_unref (src->stream); + src->stream = NULL; + } + + GST_DEBUG_OBJECT (src, "closed stream"); + + return success; +} + +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_STD_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); + } + } else if (G_IS_MEMORY_INPUT_STREAM (src->stream)) { + gsize data_size; + + data_size = + g_memory_input_stream_get_data_size (G_MEMORY_INPUT_STREAM (src-> + stream)); + + if (data_size != -1) { + *size = data_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) +{ + /* FIXME: Implement dry-run variant using guesswork like gnomevfssrc? */ + + 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; + gssize read; + gboolean success, eos; + GstFlowReturn ret = GST_FLOW_OK; + GError *err = NULL; + + if (G_UNLIKELY (offset != src->position)) { + if (!GST_GIO_STREAM_IS_SEEKABLE (src->stream)) + return GST_FLOW_NOT_SUPPORTED; + + ret = gst_gio_seek (src, G_SEEKABLE (src->stream), offset, src->cancel); + + if (ret == GST_FLOW_OK) + src->position = offset; + return ret; + } + + buf = gst_buffer_new_and_alloc (size); + + GST_LOG_OBJECT (src, "reading %u bytes from offset %" G_GUINT64_FORMAT, + size, offset); + + read = + g_input_stream_read (G_INPUT_STREAM (src->stream), GST_BUFFER_DATA (buf), + size, src->cancel, &err); + + success = (read >= 0); + eos = (size > 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_OFFSET (buf) = offset; + GST_BUFFER_SIZE (buf) = read; + *buf_return = buf; + } else { + /* !success || eos */ + gst_buffer_unref (buf); + } + + if (eos) + ret = GST_FLOW_UNEXPECTED; + + return ret; +} + +void +gst_gio_base_src_set_stream (GstGioBaseSrc * src, GInputStream * stream) +{ + g_return_if_fail (G_IS_INPUT_STREAM (stream)); + g_return_if_fail ((GST_STATE (src) != GST_STATE_PLAYING && + GST_STATE (src) != GST_STATE_PAUSED)); + + if (src->stream) { + gboolean success; + GError *err = NULL; + + success = g_input_stream_close (src->stream, src->cancel, &err); + + if (!success && !gst_gio_error (src, "g_input_stream_close", &err, NULL)) { + GST_WARNING_OBJECT (src, "g_input_stream_close failed: %s", err->message); + g_clear_error (&err); + } + + g_object_unref (src->stream); + src->stream = NULL; + } + + src->stream = stream; +} |