/* 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 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; 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); 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); 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; GError *err = NULL; if (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; } 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) { /* 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; 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; } void gst_gio_base_src_set_stream (GstGioBaseSrc * src, GInputStream * stream) { gboolean success; GError *err = NULL; 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 (G_IS_INPUT_STREAM (src->stream)) { GST_DEBUG_OBJECT (src, "closing old 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; } src->stream = stream; }