/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2000 Wim Taymans * 2001 Dominic Ludlam * * gstmultifilesrc.c: * * 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. */ #include #include #include #include #include #include #include #ifdef HAVE_CONFIG_H # include "config.h" #endif #include "../gst-i18n-lib.h" #include "gstmultifilesrc.h" GST_DEBUG_CATEGORY_STATIC (gst_multifilesrc_debug); #define GST_CAT_DEFAULT gst_multifilesrc_debug GstElementDetails gst_multifilesrc_details = GST_ELEMENT_DETAILS ("Multi File Source", "Source/File", "Read from multiple files in order", "Dominic Ludlam "); /* FileSrc signals and args */ enum { NEW_FILE, LAST_SIGNAL }; enum { ARG_0, ARG_LOCATIONS, ARG_HAVENEWMEDIA }; #define _do_init(bla) \ GST_DEBUG_CATEGORY_INIT (gst_multifilesrc_debug, "multifilesrc", 0, "multifilesrc element"); GST_BOILERPLATE_FULL (GstMultiFileSrc, gst_multifilesrc, GstElement, GST_TYPE_ELEMENT, _do_init); static void gst_multifilesrc_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_multifilesrc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static GstData *gst_multifilesrc_get (GstPad * pad); /*static GstBuffer * gst_multifilesrc_get_region (GstPad *pad,GstRegionType type,guint64 offset,guint64 len);*/ static GstElementStateReturn gst_multifilesrc_change_state (GstElement * element); static gboolean gst_multifilesrc_open_file (GstMultiFileSrc * src, GstPad * srcpad); static void gst_multifilesrc_close_file (GstMultiFileSrc * src); static guint gst_multifilesrc_signals[LAST_SIGNAL] = { 0 }; static void gst_multifilesrc_base_init (gpointer g_class) { GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class); gst_element_class_set_details (gstelement_class, &gst_multifilesrc_details); } static void gst_multifilesrc_class_init (GstMultiFileSrcClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gst_multifilesrc_signals[NEW_FILE] = g_signal_new ("new-file", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstMultiFileSrcClass, new_file), NULL, NULL, g_cclosure_marshal_VOID__STRING, G_TYPE_NONE, 1, G_TYPE_STRING); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOCATIONS, g_param_spec_pointer ("locations", "locations", "locations", G_PARAM_READWRITE)); /* CHECKME */ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_HAVENEWMEDIA, g_param_spec_boolean ("newmedia", "newmedia", "generate new media events?", FALSE, G_PARAM_READWRITE)); gobject_class->set_property = gst_multifilesrc_set_property; gobject_class->get_property = gst_multifilesrc_get_property; gstelement_class->change_state = gst_multifilesrc_change_state; } static void gst_multifilesrc_init (GstMultiFileSrc * multifilesrc) { /* GST_FLAG_SET (filesrc, GST_SRC_); */ multifilesrc->srcpad = gst_pad_new ("src", GST_PAD_SRC); gst_pad_set_get_function (multifilesrc->srcpad, gst_multifilesrc_get); /* gst_pad_set_getregion_function (multifilesrc->srcpad,gst_multifilesrc_get_region); */ gst_element_add_pad (GST_ELEMENT (multifilesrc), multifilesrc->srcpad); multifilesrc->listptr = NULL; multifilesrc->currentfilename = NULL; multifilesrc->fd = 0; multifilesrc->size = 0; multifilesrc->map = NULL; multifilesrc->new_seek = FALSE; multifilesrc->have_newmedia_events = FALSE; } static void gst_multifilesrc_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstMultiFileSrc *src; /* it's not null if we got it, but it might not be ours */ g_return_if_fail (GST_IS_MULTIFILESRC (object)); src = GST_MULTIFILESRC (object); switch (prop_id) { case ARG_LOCATIONS: /* the element must be stopped in order to do this */ g_return_if_fail (GST_STATE (src) < GST_STATE_PLAYING); /* clear the filename if we get a NULL */ if (g_value_get_pointer (value) == NULL) { gst_element_set_state (GST_ELEMENT (object), GST_STATE_NULL); src->listptr = NULL; /* otherwise set the new filenames */ } else { src->listptr = g_value_get_pointer (value); } break; case ARG_HAVENEWMEDIA: src->have_newmedia_events = g_value_get_boolean (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_multifilesrc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstMultiFileSrc *src; /* it's not null if we got it, but it might not be ours */ g_return_if_fail (GST_IS_MULTIFILESRC (object)); src = GST_MULTIFILESRC (object); switch (prop_id) { case ARG_LOCATIONS: g_value_set_pointer (value, src->listptr); break; case ARG_HAVENEWMEDIA: g_value_set_boolean (value, src->have_newmedia_events); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /** * gst_filesrc_get: * @pad: #GstPad to push a buffer from * * Push a new buffer from the filesrc at the current offset. */ static GstData * gst_multifilesrc_get (GstPad * pad) { GstMultiFileSrc *src; GstBuffer *buf; GstEvent *newmedia; GSList *list; g_return_val_if_fail (pad != NULL, NULL); src = GST_MULTIFILESRC (gst_pad_get_parent (pad)); GST_DEBUG ("curfileindex = %d newmedia flag = %s", src->curfileindex, GST_FLAG_IS_SET (src, GST_MULTIFILESRC_NEWFILE) ? "true" : "false"); switch (GST_FLAG_IS_SET (src, GST_MULTIFILESRC_NEWFILE)) { case FALSE: if (GST_FLAG_IS_SET (src, GST_MULTIFILESRC_OPEN)) gst_multifilesrc_close_file (src); if (!src->listptr) { GST_DEBUG ("sending EOS event"); gst_element_set_eos (GST_ELEMENT (src)); return GST_DATA (gst_event_new (GST_EVENT_EOS)); } list = src->listptr; src->currentfilename = (gchar *) list->data; src->listptr = src->listptr->next; if (!gst_multifilesrc_open_file (src, pad)) return NULL; src->curfileindex++; /* emitted after the open, as the user may free the list and string from here */ g_signal_emit (G_OBJECT (src), gst_multifilesrc_signals[NEW_FILE], 0, list); if (src->have_newmedia_events) { newmedia = gst_event_new_discontinuous (TRUE, GST_FORMAT_TIME, (gint64) 0, GST_FORMAT_UNDEFINED); GST_FLAG_SET (src, GST_MULTIFILESRC_NEWFILE); GST_DEBUG ("sending new media event"); return GST_DATA (newmedia); } default: if (GST_FLAG_IS_SET (src, GST_MULTIFILESRC_NEWFILE)) GST_FLAG_UNSET (src, GST_MULTIFILESRC_NEWFILE); /* create the buffer */ /* FIXME: should eventually use a bufferpool for this */ buf = gst_buffer_new (); g_return_val_if_fail (buf != NULL, NULL); /* simply set the buffer to point to the correct region of the file */ GST_BUFFER_DATA (buf) = src->map; GST_BUFFER_SIZE (buf) = src->size; GST_BUFFER_OFFSET (buf) = 0; GST_BUFFER_FLAG_SET (buf, GST_BUFFER_DONTFREE); if (src->new_seek) { /* fixme, do something here */ src->new_seek = FALSE; } /* we're done, return the buffer */ GST_DEBUG ("sending buffer"); return GST_DATA (buf); } /* should not reach here */ g_assert_not_reached (); return NULL; } /* open the file and mmap it, necessary to go to READY state */ static gboolean gst_multifilesrc_open_file (GstMultiFileSrc * src, GstPad * srcpad) { g_return_val_if_fail (!GST_FLAG_IS_SET (src, GST_MULTIFILESRC_OPEN), FALSE); if (src->currentfilename == NULL || src->currentfilename[0] == '\0') { GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (_("No file name specified for reading.")), (NULL)); return FALSE; } /* open the file. FIXME: do we need to use O_LARGEFILE here? */ src->fd = open ((const char *) src->currentfilename, O_RDONLY); if (src->fd < 0) { GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (_("Could not open file \"%s\" for reading."), src->currentfilename), GST_ERROR_SYSTEM); return FALSE; } else { /* find the file length */ src->size = lseek (src->fd, 0, SEEK_END); lseek (src->fd, 0, SEEK_SET); /* map the file into memory. * FIXME: don't map the whole file at once, there might * be restrictions set. Get max size via getrlimit * or re-try with smaller size if mmap fails with ENOMEM? */ src->map = mmap (NULL, src->size, PROT_READ, MAP_SHARED, src->fd, 0); madvise (src->map, src->size, MADV_SEQUENTIAL); /* collapse state if that failed */ if (src->map == NULL) { close (src->fd); GST_ELEMENT_ERROR (src, RESOURCE, TOO_LAZY, (NULL), ("mmap call failed.")); return FALSE; } GST_FLAG_SET (src, GST_MULTIFILESRC_OPEN); src->new_seek = TRUE; } return TRUE; } /* unmap and close the file */ static void gst_multifilesrc_close_file (GstMultiFileSrc * src) { g_return_if_fail (GST_FLAG_IS_SET (src, GST_MULTIFILESRC_OPEN)); /* unmap the file from memory and close the file */ munmap (src->map, src->size); close (src->fd); /* zero out a lot of our state */ src->fd = 0; src->size = 0; src->map = NULL; src->new_seek = FALSE; GST_FLAG_UNSET (src, GST_MULTIFILESRC_OPEN); } static GstElementStateReturn gst_multifilesrc_change_state (GstElement * element) { g_return_val_if_fail (GST_IS_MULTIFILESRC (element), GST_STATE_FAILURE); if (GST_STATE_PENDING (element) == GST_STATE_NULL) { if (GST_FLAG_IS_SET (element, GST_MULTIFILESRC_OPEN)) gst_multifilesrc_close_file (GST_MULTIFILESRC (element)); } if (GST_ELEMENT_CLASS (parent_class)->change_state) return GST_ELEMENT_CLASS (parent_class)->change_state (element); return GST_STATE_SUCCESS; }