/* GStreamer * Copyright (C) <1999> Erik Walthinsen * * 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. */ /** * Copyright (C) 2001 Billy Biggs . * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program 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 * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include //#include #include #include #include #include #include #include #include struct _DVDReadSrcPrivate { /* pads */ GstPad *srcpad; /* location */ gchar *location; gboolean new_seek; gboolean new_cell; int title, chapter, angle; int pgc_id, start_cell, cur_cell, cur_pack; int last_cell; int ttn, pgn, next_cell; dvd_reader_t *dvd; dvd_file_t *dvd_title; ifo_handle_t *vmg_file; tt_srpt_t *tt_srpt; ifo_handle_t *vts_file; vts_ptt_srpt_t *vts_ptt_srpt; pgc_t *cur_pgc; }; GST_DEBUG_CATEGORY_STATIC (gstdvdreadsrc_debug); #define GST_CAT_DEFAULT (gstdvdreadsrc_debug) GstElementDetails dvdreadsrc_details = { "DVD Source", "Source/File/DVD", "Access a DVD title/chapter/angle using libdvdread", "Erik Walthinsen ", }; /* DVDReadSrc signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0, ARG_LOCATION, ARG_TITLE, ARG_CHAPTER, ARG_ANGLE }; static void dvdreadsrc_base_init (gpointer g_class); static void dvdreadsrc_class_init (DVDReadSrcClass * klass); static void dvdreadsrc_init (DVDReadSrc * dvdreadsrc); static void dvdreadsrc_finalize (GObject * object); static void dvdreadsrc_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void dvdreadsrc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static GstData *dvdreadsrc_get (GstPad * pad); /*static GstBuffer * dvdreadsrc_get_region (GstPad *pad,gulong offset,gulong size); */ static GstElementStateReturn dvdreadsrc_change_state (GstElement * element); static GstElementClass *parent_class = NULL; /*static guint dvdreadsrc_signals[LAST_SIGNAL] = { 0 }; */ GType dvdreadsrc_get_type (void) { static GType dvdreadsrc_type = 0; if (!dvdreadsrc_type) { static const GTypeInfo dvdreadsrc_info = { sizeof (DVDReadSrcClass), dvdreadsrc_base_init, NULL, (GClassInitFunc) dvdreadsrc_class_init, NULL, NULL, sizeof (DVDReadSrc), 0, (GInstanceInitFunc) dvdreadsrc_init, }; dvdreadsrc_type = g_type_register_static (GST_TYPE_ELEMENT, "DVDReadSrc", &dvdreadsrc_info, 0); } return dvdreadsrc_type; } static void dvdreadsrc_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_set_details (element_class, &dvdreadsrc_details); } static void dvdreadsrc_class_init (DVDReadSrcClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; parent_class = g_type_class_ref (GST_TYPE_ELEMENT); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOCATION, g_param_spec_string ("location", "location", "location", NULL, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TITLE, g_param_spec_int ("title", "title", "title", 0, G_MAXINT, 0, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CHAPTER, g_param_spec_int ("chapter", "chapter", "chapter", 0, G_MAXINT, 0, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ANGLE, g_param_spec_int ("angle", "angle", "angle", 0, G_MAXINT, 0, G_PARAM_READWRITE)); gobject_class->set_property = GST_DEBUG_FUNCPTR (dvdreadsrc_set_property); gobject_class->get_property = GST_DEBUG_FUNCPTR (dvdreadsrc_get_property); gobject_class->finalize = dvdreadsrc_finalize; gstelement_class->change_state = dvdreadsrc_change_state; GST_DEBUG_CATEGORY_INIT (gstdvdreadsrc_debug, "dvdreadsrc", 0, "DVD reader element based on dvdreadsrc"); } static void dvdreadsrc_init (DVDReadSrc * dvdreadsrc) { dvdreadsrc->priv = g_new (DVDReadSrcPrivate, 1); dvdreadsrc->priv->srcpad = gst_pad_new ("src", GST_PAD_SRC); gst_pad_set_get_function (dvdreadsrc->priv->srcpad, dvdreadsrc_get); gst_element_add_pad (GST_ELEMENT (dvdreadsrc), dvdreadsrc->priv->srcpad); dvdreadsrc->priv->location = g_strdup ("/dev/dvd"); dvdreadsrc->priv->new_seek = TRUE; dvdreadsrc->priv->new_cell = TRUE; dvdreadsrc->priv->title = 0; dvdreadsrc->priv->chapter = 0; dvdreadsrc->priv->angle = 0; } static void dvdreadsrc_finalize (GObject * object) { DVDReadSrc *dvdreadsrc = DVDREADSRC (object); if (dvdreadsrc->priv) { g_free (dvdreadsrc->priv->location); g_free (dvdreadsrc->priv); dvdreadsrc->priv = NULL; } G_OBJECT_CLASS (parent_class)->finalize (object); } static void dvdreadsrc_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { DVDReadSrc *src; DVDReadSrcPrivate *priv; /* it's not null if we got it, but it might not be ours */ g_return_if_fail (GST_IS_DVDREADSRC (object)); src = DVDREADSRC (object); priv = src->priv; switch (prop_id) { case ARG_LOCATION: /* the element must be stopped in order to do this */ /*g_return_if_fail(!GST_FLAG_IS_SET(src,GST_STATE_RUNNING)); */ if (priv->location) g_free (priv->location); /* clear the filename if we get a NULL (is that possible?) */ if (g_value_get_string (value) == NULL) priv->location = g_strdup ("/dev/dvd"); /* otherwise set the new filename */ else priv->location = g_strdup (g_value_get_string (value)); break; case ARG_TITLE: priv->title = g_value_get_int (value); priv->new_seek = TRUE; break; case ARG_CHAPTER: priv->chapter = g_value_get_int (value); priv->new_seek = TRUE; break; case ARG_ANGLE: priv->angle = g_value_get_int (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void dvdreadsrc_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { DVDReadSrc *src; DVDReadSrcPrivate *priv; /* it's not null if we got it, but it might not be ours */ g_return_if_fail (GST_IS_DVDREADSRC (object)); src = DVDREADSRC (object); priv = src->priv; switch (prop_id) { case ARG_LOCATION: g_value_set_string (value, priv->location); break; case ARG_TITLE: g_value_set_int (value, priv->title); break; case ARG_CHAPTER: g_value_set_int (value, priv->chapter); break; case ARG_ANGLE: g_value_set_int (value, priv->angle); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /** * Returns true if the pack is a NAV pack. This check is clearly insufficient, * and sometimes we incorrectly think that valid other packs are NAV packs. I * need to make this stronger. */ static int is_nav_pack (unsigned char *buffer) { return (buffer[41] == 0xbf && buffer[1027] == 0xbf); } static int _open (DVDReadSrcPrivate * priv, const gchar * location) { g_return_val_if_fail (priv != NULL, -1); g_return_val_if_fail (location != NULL, -1); /** * Open the disc. */ priv->dvd = DVDOpen (location); if (!priv->dvd) { GST_ERROR ("Couldn't open DVD: %s", location); return -1; } /** * Load the video manager to find out the information about the titles on * this disc. */ priv->vmg_file = ifoOpen (priv->dvd, 0); if (!priv->vmg_file) { GST_ERROR ("Can't open VMG info"); DVDClose (priv->dvd); return -1; } priv->tt_srpt = priv->vmg_file->tt_srpt; return 0; } static int _close (DVDReadSrcPrivate * priv) { ifoClose (priv->vts_file); ifoClose (priv->vmg_file); DVDCloseFile (priv->dvd_title); DVDClose (priv->dvd); return 0; } static int _seek (DVDReadSrcPrivate * priv, int title, int chapter, int angle) { /** * Make sure our title number is valid. */ GST_LOG ("There are %d titles on this DVD", priv->tt_srpt->nr_of_srpts); if (title < 0 || title >= priv->tt_srpt->nr_of_srpts) { GST_ERROR ("Invalid title %d (only %d available)", title, priv->tt_srpt->nr_of_srpts); ifoClose (priv->vmg_file); DVDClose (priv->dvd); return -1; } /** * Make sure the chapter number is valid for this title. */ GST_LOG ("There are %d chapters in this title", priv->tt_srpt->title[title].nr_of_ptts); if (chapter < 0 || chapter >= priv->tt_srpt->title[title].nr_of_ptts) { GST_ERROR ("Invalid chapter %d (only %d available)", chapter, priv->tt_srpt->title[title].nr_of_ptts); ifoClose (priv->vmg_file); DVDClose (priv->dvd); return -1; } /** * Make sure the angle number is valid for this title. */ GST_LOG ("There are %d angles available in this title", priv->tt_srpt->title[title].nr_of_angles); if (angle < 0 || angle >= priv->tt_srpt->title[title].nr_of_angles) { GST_ERROR ("Invalid angle %d (only %d available)", angle, priv->tt_srpt->title[title].nr_of_angles); ifoClose (priv->vmg_file); DVDClose (priv->dvd); return -1; } /** * Load the VTS information for the title set our title is in. */ priv->vts_file = ifoOpen (priv->dvd, priv->tt_srpt->title[title].title_set_nr); if (!priv->vts_file) { GST_ERROR ("Can't open the info file of title %d", priv->tt_srpt->title[title].title_set_nr); ifoClose (priv->vmg_file); DVDClose (priv->dvd); return -1; } /** * Determine which program chain we want to watch. This is based on the * chapter number. */ priv->ttn = priv->tt_srpt->title[title].vts_ttn; priv->vts_ptt_srpt = priv->vts_file->vts_ptt_srpt; priv->pgc_id = priv->vts_ptt_srpt->title[priv->ttn - 1].ptt[chapter].pgcn; priv->pgn = priv->vts_ptt_srpt->title[priv->ttn - 1].ptt[chapter].pgn; priv->cur_pgc = priv->vts_file->vts_pgcit->pgci_srp[priv->pgc_id - 1].pgc; priv->start_cell = priv->cur_pgc->program_map[priv->pgn - 1] - 1; if (chapter + 1 == priv->tt_srpt->title[title].nr_of_ptts) { priv->last_cell = priv->cur_pgc->nr_of_cells; } else { priv->last_cell = priv->cur_pgc->program_map[(priv->vts_ptt_srpt->title[priv->ttn - 1].ptt[chapter + 1].pgn) - 1] - 1; } /** * We've got enough info, time to open the title set data. */ priv->dvd_title = DVDOpenFile (priv->dvd, priv->tt_srpt->title[title].title_set_nr, DVD_READ_TITLE_VOBS); if (!priv->dvd_title) { GST_ERROR ("Can't open title VOBS (VTS_%02d_1.VOB)", priv->tt_srpt->title[title].title_set_nr); ifoClose (priv->vts_file); ifoClose (priv->vmg_file); DVDClose (priv->dvd); return -1; } return 0; } /* * Read function. * -1: error, -2: eos, -3: try again, 0: ok. */ static int _read (DVDReadSrcPrivate * priv, int angle, int new_seek, GstBuffer * buf) { unsigned char *data; data = GST_BUFFER_DATA (buf); /** * Playback by cell in this pgc, starting at the cell for our chapter. */ if (new_seek) { priv->next_cell = priv->start_cell; priv->cur_cell = priv->start_cell; } if (priv->cur_cell < priv->last_cell) { if (priv->new_cell) priv->cur_cell = priv->next_cell; /* Check if we're entering an angle block. */ if (priv->cur_pgc->cell_playback[priv->cur_cell].block_type == BLOCK_TYPE_ANGLE_BLOCK) { int i; priv->cur_cell += angle; for (i = 0;; ++i) { if (priv->cur_pgc->cell_playback[priv->cur_cell + i].block_mode == BLOCK_MODE_LAST_CELL) { priv->next_cell = priv->cur_cell + i + 1; break; } } } else { priv->next_cell = priv->cur_cell + 1; } /** * We loop until we're out of this cell. */ if (priv->new_cell) { priv->cur_pack = priv->cur_pgc->cell_playback[priv->cur_cell].first_sector; priv->new_cell = FALSE; } if (priv->cur_pack < priv->cur_pgc->cell_playback[priv->cur_cell].last_sector) { dsi_t dsi_pack; unsigned int next_vobu, next_ilvu_start, cur_output_size; int len; /** * Read NAV packet. */ nav_retry: len = DVDReadBlocks (priv->dvd_title, priv->cur_pack, 1, data); if (len == 0) { GST_ERROR ("Read failed for block %d", priv->cur_pack); return -1; } if (!is_nav_pack (data)) { priv->cur_pack++; goto nav_retry; } /** * Parse the contained dsi packet. */ navRead_DSI (&dsi_pack, &(data[DSI_START_BYTE])); assert (priv->cur_pack == dsi_pack.dsi_gi.nv_pck_lbn); /** * Determine where we go next. These values are the ones we mostly * care about. */ next_ilvu_start = priv->cur_pack + dsi_pack.sml_agli.data[angle].address; cur_output_size = dsi_pack.dsi_gi.vobu_ea; /** * If we're not at the end of this cell, we can determine the next * VOBU to display using the VOBU_SRI information section of the * DSI. Using this value correctly follows the current angle, * avoiding the doubled scenes in The Matrix, and makes our life * really happy. * * Otherwise, we set our next address past the end of this cell to * force the code above to go to the next cell in the program. */ if (dsi_pack.vobu_sri.next_vobu != SRI_END_OF_CELL) { next_vobu = priv->cur_pack + (dsi_pack.vobu_sri.next_vobu & 0x7fffffff); } else { next_vobu = priv->cur_pack + cur_output_size + 1; } assert (cur_output_size < 1024); priv->cur_pack++; /** * Read in and output cursize packs. */ len = DVDReadBlocks (priv->dvd_title, priv->cur_pack, cur_output_size, data); if (len != cur_output_size) { GST_ERROR ("Read failed for %d blocks at %d", cur_output_size, priv->cur_pack); return -1; } GST_BUFFER_SIZE (buf) = cur_output_size * DVD_VIDEO_LB_LEN; priv->cur_pack = next_vobu; return 0; } else { priv->new_cell = TRUE; } } else { return -2; } /* again */ return -3; } static GstData * dvdreadsrc_get (GstPad * pad) { gint res; DVDReadSrc *dvdreadsrc; DVDReadSrcPrivate *priv; GstBuffer *buf; g_return_val_if_fail (pad != NULL, NULL); g_return_val_if_fail (GST_IS_PAD (pad), NULL); dvdreadsrc = DVDREADSRC (gst_pad_get_parent (pad)); priv = dvdreadsrc->priv; g_return_val_if_fail (GST_FLAG_IS_SET (dvdreadsrc, DVDREADSRC_OPEN), NULL); /* create the buffer */ /* FIXME: should eventually use a bufferpool for this */ buf = gst_buffer_new_and_alloc (1024 * DVD_VIDEO_LB_LEN); if (priv->new_seek) { _seek (priv, priv->title, priv->chapter, priv->angle); } /* read it in from the file */ while ((res = _read (priv, priv->angle, priv->new_seek, buf)) == -3); switch (res) { case -1: GST_ELEMENT_ERROR (dvdreadsrc, RESOURCE, READ, (NULL), (NULL)); gst_buffer_unref (buf); return NULL; case -2: gst_element_set_eos (GST_ELEMENT (dvdreadsrc)); gst_buffer_unref (buf); return GST_DATA (gst_event_new (GST_EVENT_EOS)); case 0: break; default: g_assert_not_reached (); } priv->new_seek = FALSE; return GST_DATA (buf); } /* open the file, necessary to go to RUNNING state */ static gboolean dvdreadsrc_open_file (DVDReadSrc * src) { g_return_val_if_fail (src != NULL, FALSE); g_return_val_if_fail (GST_IS_DVDREADSRC (src), FALSE); g_return_val_if_fail (!GST_FLAG_IS_SET (src, DVDREADSRC_OPEN), FALSE); if (_open (src->priv, src->priv->location)) { GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL), (NULL)); return FALSE; } if (_seek (src->priv, src->priv->title, src->priv->chapter, src->priv->angle)) { GST_ELEMENT_ERROR (src, RESOURCE, SEEK, (NULL), (NULL)); return FALSE; } GST_FLAG_SET (src, DVDREADSRC_OPEN); return TRUE; } /* close the file */ static void dvdreadsrc_close_file (DVDReadSrc * src) { g_return_if_fail (GST_FLAG_IS_SET (src, DVDREADSRC_OPEN)); _close (src->priv); GST_FLAG_UNSET (src, DVDREADSRC_OPEN); } static GstElementStateReturn dvdreadsrc_change_state (GstElement * element) { DVDReadSrc *dvdreadsrc = DVDREADSRC (element); g_return_val_if_fail (GST_IS_DVDREADSRC (element), GST_STATE_FAILURE); GST_DEBUG ("gstdvdreadsrc: state pending %d", GST_STATE_PENDING (element)); /* if going down into NULL state, close the file if it's open */ switch (GST_STATE_TRANSITION (element)) { case GST_STATE_NULL_TO_READY: if (!dvdreadsrc_open_file (DVDREADSRC (element))) return GST_STATE_FAILURE; break; case GST_STATE_PAUSED_TO_READY: dvdreadsrc->priv->new_cell = TRUE; dvdreadsrc->priv->new_seek = TRUE; dvdreadsrc->priv->chapter = 0; dvdreadsrc->priv->title = 0; break; case GST_STATE_READY_TO_NULL: dvdreadsrc_close_file (DVDREADSRC (element)); break; default: break; } /* if we haven't failed already, give the parent class a chance to ;-) */ if (GST_ELEMENT_CLASS (parent_class)->change_state) return GST_ELEMENT_CLASS (parent_class)->change_state (element); return GST_STATE_SUCCESS; } static gboolean plugin_init (GstPlugin * plugin) { if (!gst_element_register (plugin, "dvdreadsrc", GST_RANK_NONE, GST_TYPE_DVDREADSRC)) return FALSE; return TRUE; } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "dvdreadsrc", "Access a DVD with dvdread", plugin_init, VERSION, "GPL", GST_PACKAGE, GST_ORIGIN)