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gstreamer/ext/dvdread/dvdreadsrc.c
Jan Schmidt 5dfd112521 dvdread: Also reset the first_seek var in start() 
Make the initial chapter seek work across reuse.

https://bugzilla.gnome.org/show_bug.cgi?id=453322
2015-05-12 22:06:15 +10:00

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/* GStreamer DVD title source
* Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 2001 Billy Biggs <vektor@dumbterm.net>.
* Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "_stdint.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include "dvdreadsrc.h"
#include <gmodule.h>
#include <gst/gst-i18n-plugin.h>
GST_DEBUG_CATEGORY_STATIC (gstgst_dvd_read_src_debug);
#define GST_CAT_DEFAULT (gstgst_dvd_read_src_debug)
enum
{
ARG_0,
ARG_DEVICE,
ARG_TITLE,
ARG_CHAPTER,
ARG_ANGLE
};
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/mpeg, mpegversion=2, systemstream=(boolean)true"));
static GstFormat title_format;
static GstFormat angle_format;
static GstFormat sector_format;
static GstFormat chapter_format;
static gboolean gst_dvd_read_src_start (GstBaseSrc * basesrc);
static gboolean gst_dvd_read_src_stop (GstBaseSrc * basesrc);
static GstFlowReturn gst_dvd_read_src_create (GstPushSrc * pushsrc,
GstBuffer ** buf);
static gboolean gst_dvd_read_src_src_query (GstBaseSrc * basesrc,
GstQuery * query);
static gboolean gst_dvd_read_src_src_event (GstBaseSrc * basesrc,
GstEvent * event);
static gboolean gst_dvd_read_src_goto_title (GstDvdReadSrc * src, gint title,
gint angle);
static gboolean gst_dvd_read_src_goto_chapter (GstDvdReadSrc * src,
gint chapter);
static gboolean gst_dvd_read_src_goto_sector (GstDvdReadSrc * src, gint angle);
static void gst_dvd_read_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_dvd_read_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstEvent *gst_dvd_read_src_make_clut_change_event (GstDvdReadSrc * src,
const guint * clut);
static gboolean gst_dvd_read_src_get_size (GstDvdReadSrc * src, gint64 * size);
static gboolean gst_dvd_read_src_do_seek (GstBaseSrc * src, GstSegment * s);
static gint64 gst_dvd_read_src_convert_timecode (dvd_time_t * time);
static gint gst_dvd_read_src_get_next_cell (GstDvdReadSrc * src,
pgc_t * pgc, gint cell);
static GstClockTime gst_dvd_read_src_get_time_for_sector (GstDvdReadSrc * src,
guint sector);
static gint gst_dvd_read_src_get_sector_from_time (GstDvdReadSrc * src,
GstClockTime ts);
static void gst_dvd_read_src_uri_handler_init (gpointer g_iface,
gpointer iface_data);
#define gst_dvd_read_src_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstDvdReadSrc, gst_dvd_read_src, GST_TYPE_PUSH_SRC,
G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER,
gst_dvd_read_src_uri_handler_init));
static void
gst_dvd_read_src_finalize (GObject * object)
{
GstDvdReadSrc *src = GST_DVD_READ_SRC (object);
g_free (src->location);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_dvd_read_src_init (GstDvdReadSrc * src)
{
src->dvd = NULL;
src->vts_file = NULL;
src->vmg_file = NULL;
src->dvd_title = NULL;
src->location = g_strdup ("/dev/dvd");
src->first_seek = TRUE;
src->new_seek = TRUE;
src->new_cell = TRUE;
src->change_cell = FALSE;
src->uri_title = 1;
src->uri_chapter = 1;
src->uri_angle = 1;
src->title_lang_event_pending = NULL;
src->pending_clut_event = NULL;
gst_pad_use_fixed_caps (GST_BASE_SRC_PAD (src));
gst_pad_set_caps (GST_BASE_SRC_PAD (src),
gst_static_pad_template_get_caps (&srctemplate));
}
static gboolean
gst_dvd_read_src_is_seekable (GstBaseSrc * src)
{
return TRUE;
}
static void
gst_dvd_read_src_class_init (GstDvdReadSrcClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GstPushSrcClass *gstpushsrc_class = GST_PUSH_SRC_CLASS (klass);
GstBaseSrcClass *gstbasesrc_class = GST_BASE_SRC_CLASS (klass);
gobject_class->finalize = gst_dvd_read_src_finalize;
gobject_class->set_property = gst_dvd_read_src_set_property;
gobject_class->get_property = gst_dvd_read_src_get_property;
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DEVICE,
g_param_spec_string ("device", "Device",
"DVD device location", NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TITLE,
g_param_spec_int ("title", "title", "title",
1, 999, 1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CHAPTER,
g_param_spec_int ("chapter", "chapter", "chapter",
1, 999, 1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ANGLE,
g_param_spec_int ("angle", "angle", "angle",
1, 999, 1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&srctemplate));
gst_element_class_set_static_metadata (gstelement_class, "DVD Source",
"Source/File/DVD",
"Access a DVD title/chapter/angle using libdvdread",
"Erik Walthinsen <omega@cse.ogi.edu>");
gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_dvd_read_src_start);
gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_dvd_read_src_stop);
gstbasesrc_class->query = GST_DEBUG_FUNCPTR (gst_dvd_read_src_src_query);
gstbasesrc_class->event = GST_DEBUG_FUNCPTR (gst_dvd_read_src_src_event);
gstbasesrc_class->do_seek = GST_DEBUG_FUNCPTR (gst_dvd_read_src_do_seek);
gstbasesrc_class->is_seekable =
GST_DEBUG_FUNCPTR (gst_dvd_read_src_is_seekable);
gstpushsrc_class->create = GST_DEBUG_FUNCPTR (gst_dvd_read_src_create);
title_format = gst_format_register ("title", "DVD title");
angle_format = gst_format_register ("angle", "DVD angle");
sector_format = gst_format_register ("sector", "DVD sector");
chapter_format = gst_format_register ("chapter", "DVD chapter");
}
static gboolean
gst_dvd_read_src_start (GstBaseSrc * basesrc)
{
GstDvdReadSrc *src = GST_DVD_READ_SRC (basesrc);
g_return_val_if_fail (src->location != NULL, FALSE);
GST_DEBUG_OBJECT (src, "Opening DVD '%s'", src->location);
if ((src->dvd = DVDOpen (src->location)) == NULL)
goto open_failed;
/* Load the video manager to find out the information about the titles */
GST_DEBUG_OBJECT (src, "Loading VMG info");
if (!(src->vmg_file = ifoOpen (src->dvd, 0)))
goto ifo_open_failed;
src->tt_srpt = src->vmg_file->tt_srpt;
src->title = src->uri_title - 1;
src->chapter = src->uri_chapter - 1;
src->angle = src->uri_angle - 1;
if (!gst_dvd_read_src_goto_title (src, src->title, src->angle))
goto title_open_failed;
if (!gst_dvd_read_src_goto_chapter (src, src->chapter))
goto chapter_open_failed;
src->new_seek = FALSE;
src->change_cell = TRUE;
src->first_seek = TRUE;
return TRUE;
/* ERRORS */
open_failed:
{
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ,
(_("Could not open DVD")),
("DVDOpen(%s) failed: %s", src->location, g_strerror (errno)));
return FALSE;
}
ifo_open_failed:
{
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ,
(_("Could not open DVD")),
("ifoOpen() failed: %s", g_strerror (errno)));
return FALSE;
}
title_open_failed:
{
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ,
(_("Could not open DVD title %d"), src->uri_title), (NULL));
return FALSE;
}
chapter_open_failed:
{
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ,
(_("Failed to go to chapter %d of DVD title %d"),
src->uri_chapter, src->uri_title), (NULL));
return FALSE;
}
}
static gboolean
gst_dvd_read_src_stop (GstBaseSrc * basesrc)
{
GstDvdReadSrc *src = GST_DVD_READ_SRC (basesrc);
if (src->vts_file) {
ifoClose (src->vts_file);
src->vts_file = NULL;
}
if (src->vmg_file) {
ifoClose (src->vmg_file);
src->vmg_file = NULL;
}
if (src->dvd_title) {
DVDCloseFile (src->dvd_title);
src->dvd_title = NULL;
}
if (src->dvd) {
DVDClose (src->dvd);
src->dvd = NULL;
}
src->new_cell = TRUE;
src->new_seek = TRUE;
src->change_cell = FALSE;
src->chapter = 0;
src->title = 0;
src->need_newsegment = TRUE;
src->vts_tmapt = NULL;
if (src->title_lang_event_pending) {
gst_event_unref (src->title_lang_event_pending);
src->title_lang_event_pending = NULL;
}
if (src->pending_clut_event) {
gst_event_unref (src->pending_clut_event);
src->pending_clut_event = NULL;
}
if (src->chapter_starts) {
g_free (src->chapter_starts);
src->chapter_starts = NULL;
}
GST_LOG_OBJECT (src, "closed DVD");
return TRUE;
}
static void
cur_title_get_chapter_pgc (GstDvdReadSrc * src, gint chapter, gint * p_pgn,
gint * p_pgc_id, pgc_t ** p_pgc)
{
pgc_t *pgc;
gint pgn, pgc_id;
g_assert (chapter >= 0 && chapter < src->num_chapters);
pgc_id = src->vts_ptt_srpt->title[src->ttn - 1].ptt[chapter].pgcn;
pgn = src->vts_ptt_srpt->title[src->ttn - 1].ptt[chapter].pgn;
pgc = src->vts_file->vts_pgcit->pgci_srp[pgc_id - 1].pgc;
*p_pgn = pgn;
*p_pgc_id = pgc_id;
*p_pgc = pgc;
}
static void
cur_title_get_chapter_bounds (GstDvdReadSrc * src, gint chapter,
gint * p_first_cell, gint * p_last_cell)
{
pgc_t *pgc;
gint pgn, pgc_id, pgn_next_ch;
g_assert (chapter >= 0 && chapter < src->num_chapters);
cur_title_get_chapter_pgc (src, chapter, &pgn, &pgc_id, &pgc);
*p_first_cell = pgc->program_map[pgn - 1] - 1;
/* last cell is used as a 'up to boundary', not 'up to and including',
* i.e. it is the first cell not included in the chapter range */
if (chapter == (src->num_chapters - 1)) {
*p_last_cell = pgc->nr_of_cells;
} else {
pgn_next_ch = src->vts_ptt_srpt->title[src->ttn - 1].ptt[chapter + 1].pgn;
*p_last_cell = pgc->program_map[pgn_next_ch - 1] - 1;
}
GST_DEBUG_OBJECT (src, "Chapter %d bounds: %d %d (within %d cells)",
chapter, *p_first_cell, *p_last_cell, pgc->nr_of_cells);
}
static gboolean
gst_dvd_read_src_goto_chapter (GstDvdReadSrc * src, gint chapter)
{
gint i;
/* make sure the chapter number is valid for this title */
if (chapter < 0 || chapter >= src->num_chapters) {
GST_WARNING_OBJECT (src, "invalid chapter %d (only %d available)",
chapter, src->num_chapters);
chapter = CLAMP (chapter, 0, src->num_chapters - 1);
}
/* determine which program chain we want to watch. This is
* based on the chapter number */
cur_title_get_chapter_pgc (src, chapter, &src->pgn, &src->pgc_id,
&src->cur_pgc);
cur_title_get_chapter_bounds (src, chapter, &src->start_cell,
&src->last_cell);
GST_LOG_OBJECT (src, "Opened chapter %d - cell %d-%d", chapter + 1,
src->start_cell, src->last_cell);
/* retrieve position */
src->cur_pack = 0;
for (i = 0; i < chapter; i++) {
gint c1, c2;
cur_title_get_chapter_bounds (src, i, &c1, &c2);
while (c1 < c2) {
src->cur_pack +=
src->cur_pgc->cell_playback[c1].last_sector -
src->cur_pgc->cell_playback[c1].first_sector;
++c1;
}
}
/* prepare reading for new cell */
src->new_cell = TRUE;
src->next_cell = src->start_cell;
src->chapter = chapter;
if (src->pending_clut_event)
gst_event_unref (src->pending_clut_event);
src->pending_clut_event =
gst_dvd_read_src_make_clut_change_event (src, src->cur_pgc->palette);
return TRUE;
}
static void
gst_dvd_read_src_get_chapter_starts (GstDvdReadSrc * src)
{
GstClockTime uptohere;
guint c;
g_free (src->chapter_starts);
src->chapter_starts = g_new (GstClockTime, src->num_chapters);
uptohere = (GstClockTime) 0;
for (c = 0; c < src->num_chapters; ++c) {
GstClockTime chapter_duration = 0;
gint cell_start, cell_end, cell;
gint pgn, pgc_id;
pgc_t *pgc;
cur_title_get_chapter_pgc (src, c, &pgn, &pgc_id, &pgc);
cur_title_get_chapter_bounds (src, c, &cell_start, &cell_end);
cell = cell_start;
while (cell < cell_end) {
dvd_time_t *cell_duration;
cell_duration = &pgc->cell_playback[cell].playback_time;
chapter_duration += gst_dvd_read_src_convert_timecode (cell_duration);
cell = gst_dvd_read_src_get_next_cell (src, pgc, cell);
}
src->chapter_starts[c] = uptohere;
GST_INFO_OBJECT (src, "[%02u] Chapter %02u starts at %" GST_TIME_FORMAT
", dur = %" GST_TIME_FORMAT ", cells %d-%d", src->title + 1, c + 1,
GST_TIME_ARGS (uptohere), GST_TIME_ARGS (chapter_duration),
cell_start, cell_end);
uptohere += chapter_duration;
}
}
static gboolean
gst_dvd_read_src_goto_title (GstDvdReadSrc * src, gint title, gint angle)
{
GstStructure *s;
gchar lang_code[3] = { '\0', '\0', '\0' }, *t;
pgc_t *pgc0;
gint title_set_nr;
gint num_titles;
gint pgn0, pgc0_id;
gint i;
/* make sure our title number is valid */
num_titles = src->tt_srpt->nr_of_srpts;
GST_INFO_OBJECT (src, "There are %d titles on this DVD", num_titles);
if (title < 0 || title >= num_titles)
goto invalid_title;
src->num_chapters = src->tt_srpt->title[title].nr_of_ptts;
GST_INFO_OBJECT (src, "Title %d has %d chapters", title + 1,
src->num_chapters);
/* make sure the angle number is valid for this title */
src->num_angles = src->tt_srpt->title[title].nr_of_angles;
GST_LOG_OBJECT (src, "Title %d has %d angles", title + 1, src->num_angles);
if (angle < 0 || angle >= src->num_angles) {
GST_WARNING_OBJECT (src, "Invalid angle %d (only %d available)",
angle, src->num_angles);
angle = CLAMP (angle, 0, src->num_angles - 1);
}
/* load the VTS information for the title set our title is in */
title_set_nr = src->tt_srpt->title[title].title_set_nr;
src->vts_file = ifoOpen (src->dvd, title_set_nr);
if (src->vts_file == NULL)
goto ifo_open_failed;
src->ttn = src->tt_srpt->title[title].vts_ttn;
src->vts_ptt_srpt = src->vts_file->vts_ptt_srpt;
/* interactive title? */
if (src->num_chapters > 0 &&
src->vts_ptt_srpt->title[src->ttn - 1].ptt[0].pgn == 0) {
goto commands_only_pgc;
}
/* we've got enough info, time to open the title set data */
src->dvd_title = DVDOpenFile (src->dvd, title_set_nr, DVD_READ_TITLE_VOBS);
if (src->dvd_title == NULL)
goto title_open_failed;
GST_INFO_OBJECT (src, "Opened title %d, angle %d", title + 1, angle);
src->title = title;
src->angle = angle;
/* build event */
if (src->title_lang_event_pending) {
gst_event_unref (src->title_lang_event_pending);
src->title_lang_event_pending = NULL;
}
s = gst_structure_new ("application/x-gst-dvd",
"event", G_TYPE_STRING, "dvd-lang-codes", NULL);
/* so we can filter out invalid/unused streams (same for all chapters) */
cur_title_get_chapter_pgc (src, 0, &pgn0, &pgc0_id, &pgc0);
/* audio */
for (i = 0; i < src->vts_file->vtsi_mat->nr_of_vts_audio_streams; i++) {
const audio_attr_t *a;
/* audio stream present? */
if (pgc0 != NULL && (pgc0->audio_control[i] & 0x8000) == 0)
continue;
a = &src->vts_file->vtsi_mat->vts_audio_attr[i];
t = g_strdup_printf ("audio-%d-format", i);
gst_structure_set (s, t, G_TYPE_INT, (int) a->audio_format, NULL);
g_free (t);
t = g_strdup_printf ("audio-%d-stream", i);
gst_structure_set (s, t, G_TYPE_INT, (int) i, NULL);
g_free (t);
if (a->lang_type) {
t = g_strdup_printf ("audio-%d-language", i);
lang_code[0] = (a->lang_code >> 8) & 0xff;
lang_code[1] = a->lang_code & 0xff;
gst_structure_set (s, t, G_TYPE_STRING, lang_code, NULL);
g_free (t);
} else {
lang_code[0] = '\0';
}
GST_INFO_OBJECT (src, "[%02d] Audio %02d: lang='%s', format=%d",
src->title + 1, i, lang_code, (gint) a->audio_format);
}
/* subtitle */
for (i = 0; i < src->vts_file->vtsi_mat->nr_of_vts_subp_streams; i++) {
const subp_attr_t *u;
const video_attr_t *v;
gint sid;
/* subpicture stream present? */
if (pgc0 != NULL && (pgc0->subp_control[i] & 0x80000000) == 0)
continue;
u = &src->vts_file->vtsi_mat->vts_subp_attr[i];
v = &src->vts_file->vtsi_mat->vts_video_attr;
sid = i;
if (pgc0 != NULL) {
if (v->display_aspect_ratio == 0) /* 4:3 */
sid = (pgc0->subp_control[i] >> 24) & 0x1f;
else if (v->display_aspect_ratio == 3) /* 16:9 */
sid = (pgc0->subp_control[i] >> 8) & 0x1f;
}
if (u->type) {
t = g_strdup_printf ("subpicture-%d-language", i);
lang_code[0] = (u->lang_code >> 8) & 0xff;
lang_code[1] = u->lang_code & 0xff;
gst_structure_set (s, t, G_TYPE_STRING, lang_code, NULL);
t = g_strdup_printf ("subpicture-%d-stream", i);
gst_structure_set (s, t, G_TYPE_INT, (int) sid, NULL);
g_free (t);
t = g_strdup_printf ("subpicture-%d-format", i);
gst_structure_set (s, t, G_TYPE_INT, (int) 0, NULL);
g_free (t);
} else {
lang_code[0] = '\0';
}
GST_INFO_OBJECT (src, "[%02d] Subtitle %02d: lang='%s', type=%d",
src->title + 1, sid, lang_code, u->type);
}
src->title_lang_event_pending =
gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM, s);
/* dump seek tables */
src->vts_tmapt = src->vts_file->vts_tmapt;
if (src->vts_tmapt) {
gint i, j;
GST_LOG_OBJECT (src, "nr_of_tmaps = %d", src->vts_tmapt->nr_of_tmaps);
for (i = 0; i < src->vts_tmapt->nr_of_tmaps; ++i) {
GST_LOG_OBJECT (src, "======= Table %d ===================", i);
GST_LOG_OBJECT (src, "Offset relative to VTS_TMAPTI: %d",
src->vts_tmapt->tmap_offset[i]);
GST_LOG_OBJECT (src, "Time unit (seconds) : %d",
src->vts_tmapt->tmap[i].tmu);
GST_LOG_OBJECT (src, "Number of entries : %d",
src->vts_tmapt->tmap[i].nr_of_entries);
for (j = 0; j < src->vts_tmapt->tmap[i].nr_of_entries; j++) {
guint64 time;
time = (guint64) src->vts_tmapt->tmap[i].tmu * (j + 1) * GST_SECOND;
GST_LOG_OBJECT (src, "Time: %" GST_TIME_FORMAT " VOBU "
"Sector: 0x%08x %s", GST_TIME_ARGS (time),
src->vts_tmapt->tmap[i].map_ent[j] & 0x7fffffff,
(src->vts_tmapt->tmap[i].map_ent[j] >> 31) ? "discontinuity" : "");
}
}
} else {
GST_WARNING_OBJECT (src, "no vts_tmapt - seeking will suck");
}
gst_dvd_read_src_get_chapter_starts (src);
return TRUE;
/* ERRORS */
invalid_title:
{
GST_WARNING_OBJECT (src, "Invalid title %d (only %d available)",
title, num_titles);
return FALSE;
}
ifo_open_failed:
{
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ,
(_("Could not open DVD title %d"), title_set_nr),
("ifoOpen(%d) failed: %s", title_set_nr, g_strerror (errno)));
return FALSE;
}
title_open_failed:
{
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ,
(_("Could not open DVD title %d"), title_set_nr),
("Can't open title VOBS (VTS_%02d_1.VOB)", title_set_nr));
return FALSE;
}
commands_only_pgc:
{
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ,
(_("Could not open DVD title %d. Interactive titles are not supported "
"by this element"), title_set_nr),
("Commands-only PGC, not supported, use rsndvdbin"));
return FALSE;
}
}
/* FIXME: double-check this function, compare against original */
static gint
gst_dvd_read_src_get_next_cell (GstDvdReadSrc * src, pgc_t * pgc, gint cell)
{
/* Check if we're entering an angle block. */
if (pgc->cell_playback[cell].block_type != BLOCK_TYPE_ANGLE_BLOCK)
return (cell + 1);
while (pgc->cell_playback[cell].block_mode != BLOCK_MODE_LAST_CELL)
++cell;
return cell + 1;
}
/* Returns true if the pack is a NAV pack */
static gboolean
gst_dvd_read_src_is_nav_pack (const guint8 * data, gint lbn, dsi_t * dsi_pack)
{
if (GST_READ_UINT32_BE (data + 0x26) != 0x000001BF)
return FALSE;
/* Check that this is substream 0 (PCI) */
if (data[0x2c] != 0)
return FALSE;
if (GST_READ_UINT32_BE (data + 0x400) != 0x000001BF)
return FALSE;
/* Check that this is substream 1 (DSI) */
if (data[0x406] != 1)
return FALSE;
/* Check sizes of PCI and DSI packets */
if (GST_READ_UINT16_BE (data + 0x2a) != 0x03d4)
return FALSE;
if (GST_READ_UINT16_BE (data + 0x404) != 0x03fa)
return FALSE;
/* Read the DSI packet into the provided struct and check it */
navRead_DSI (dsi_pack, (unsigned char *) data + DSI_START_BYTE);
if (lbn != dsi_pack->dsi_gi.nv_pck_lbn)
return FALSE;
return TRUE;
}
/* find time for sector from index, returns NONE if there is no exact match */
static GstClockTime
gst_dvd_read_src_get_time_for_sector (GstDvdReadSrc * src, guint sector)
{
gint i, j;
if (src->vts_tmapt == NULL || src->vts_tmapt->nr_of_tmaps == 0)
return GST_CLOCK_TIME_NONE;
for (i = 0; i < src->vts_tmapt->nr_of_tmaps; ++i) {
for (j = 0; j < src->vts_tmapt->tmap[i].nr_of_entries; ++j) {
if ((src->vts_tmapt->tmap[i].map_ent[j] & 0x7fffffff) == sector)
return (guint64) src->vts_tmapt->tmap[i].tmu * (j + 1) * GST_SECOND;
}
}
if (sector == 0)
return (GstClockTime) 0;
return GST_CLOCK_TIME_NONE;
}
/* returns the sector in the index at (or before) the given time, or -1 */
static gint
gst_dvd_read_src_get_sector_from_time (GstDvdReadSrc * src, GstClockTime ts)
{
gint sector, j;
if (src->vts_tmapt == NULL || src->vts_tmapt->nr_of_tmaps < src->ttn)
return -1;
sector = 0;
for (j = 0; j < src->vts_tmapt->tmap[src->ttn - 1].nr_of_entries; ++j) {
GstClockTime entry_time;
entry_time =
(guint64) src->vts_tmapt->tmap[src->ttn - 1].tmu * (j + 1) * GST_SECOND;
if (entry_time <= ts) {
sector = src->vts_tmapt->tmap[src->ttn - 1].map_ent[j] & 0x7fffffff;
}
if (entry_time >= ts) {
return sector;
}
}
if (ts == 0)
return 0;
return -1;
}
typedef enum
{
GST_DVD_READ_OK = 0,
GST_DVD_READ_ERROR = -1,
GST_DVD_READ_EOS = -2,
GST_DVD_READ_AGAIN = -3
} GstDvdReadReturn;
static GstDvdReadReturn
gst_dvd_read_src_read (GstDvdReadSrc * src, gint angle, gint new_seek,
GstBuffer ** p_buf)
{
GstBuffer *buf;
GstSegment *seg;
guint8 oneblock[DVD_VIDEO_LB_LEN];
dsi_t dsi_pack;
guint next_vobu, cur_output_size;
gint len;
gint retries;
gint64 next_time;
GstMapInfo map;
seg = &(GST_BASE_SRC (src)->segment);
/* playback by cell in this pgc, starting at the cell for our chapter */
if (new_seek)
src->cur_cell = src->start_cell;
again:
if (src->cur_cell >= src->last_cell) {
/* advance to next chapter */
if (src->chapter == (src->num_chapters - 1) ||
(seg->format == chapter_format && seg->stop != -1 &&
src->chapter == (seg->stop - 1))) {
GST_DEBUG_OBJECT (src, "end of chapter segment");
goto eos;
}
GST_INFO_OBJECT (src, "end of chapter %d, switch to next",
src->chapter + 1);
++src->chapter;
gst_dvd_read_src_goto_chapter (src, src->chapter);
return GST_DVD_READ_AGAIN;
}
if (src->new_cell || new_seek) {
if (!new_seek) {
src->cur_cell = src->next_cell;
if (src->cur_cell >= src->last_cell) {
GST_LOG_OBJECT (src, "last cell in chapter");
goto again;
}
}
/* take angle into account */
if (src->cur_pgc->cell_playback[src->cur_cell].block_type
== BLOCK_TYPE_ANGLE_BLOCK)
src->cur_cell += angle;
/* calculate next cell */
src->next_cell =
gst_dvd_read_src_get_next_cell (src, src->cur_pgc, src->cur_cell);
/* we loop until we're out of this cell */
src->cur_pack = src->cur_pgc->cell_playback[src->cur_cell].first_sector;
src->new_cell = FALSE;
GST_DEBUG_OBJECT (src, "Starting new cell %d @ pack %d", src->cur_cell,
src->cur_pack);
}
if (src->cur_pack >= src->cur_pgc->cell_playback[src->cur_cell].last_sector) {
src->new_cell = TRUE;
GST_LOG_OBJECT (src, "Beyond last sector for cell %d, going to next cell",
src->cur_cell);
return GST_DVD_READ_AGAIN;
}
/* read NAV packet */
retries = 0;
nav_retry:
retries++;
len = DVDReadBlocks (src->dvd_title, src->cur_pack, 1, oneblock);
if (len != 1)
goto read_error;
if (!gst_dvd_read_src_is_nav_pack (oneblock, src->cur_pack, &dsi_pack)) {
GST_LOG_OBJECT (src, "Skipping nav packet @ pack %d", src->cur_pack);
src->cur_pack++;
if (retries < 2000) {
goto nav_retry;
} else {
GST_LOG_OBJECT (src, "No nav packet @ pack %d after 2000 blocks",
src->cur_pack);
goto read_error;
}
}
/* determine where we go next. These values are the ones we
* mostly care about */
cur_output_size = dsi_pack.dsi_gi.vobu_ea + 1;
/* 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 = src->cur_pack + (dsi_pack.vobu_sri.next_vobu & 0x7fffffff);
} else {
next_vobu = src->cur_pgc->cell_playback[src->cur_cell].last_sector + 1;
}
g_assert (cur_output_size < 1024);
/* create the buffer (TODO: use buffer pool?) */
buf =
gst_buffer_new_allocate (NULL, cur_output_size * DVD_VIDEO_LB_LEN, NULL);
GST_LOG_OBJECT (src, "Going to read %u sectors @ pack %d", cur_output_size,
src->cur_pack);
gst_buffer_map (buf, &map, GST_MAP_WRITE);
/* read in and output cursize packs */
len =
DVDReadBlocks (src->dvd_title, src->cur_pack, cur_output_size, map.data);
if (len != cur_output_size)
goto block_read_error;
gst_buffer_unmap (buf, &map);
gst_buffer_resize (buf, 0, cur_output_size * DVD_VIDEO_LB_LEN);
/* GST_BUFFER_OFFSET (buf) = priv->cur_pack * DVD_VIDEO_LB_LEN; */
GST_BUFFER_TIMESTAMP (buf) =
gst_dvd_read_src_get_time_for_sector (src, src->cur_pack);
*p_buf = buf;
GST_LOG_OBJECT (src, "Read %u sectors", cur_output_size);
src->cur_pack = next_vobu;
next_time = GST_BUFFER_TIMESTAMP (buf);
if (GST_CLOCK_TIME_IS_VALID (next_time) && seg->format == GST_FORMAT_TIME &&
GST_CLOCK_TIME_IS_VALID (seg->stop) &&
next_time > seg->stop + 5 * GST_SECOND) {
GST_DEBUG_OBJECT (src, "end of TIME segment");
goto eos;
}
return GST_DVD_READ_OK;
/* ERRORS */
eos:
{
GST_INFO_OBJECT (src, "Reached end-of-segment/stream - EOS");
return GST_DVD_READ_EOS;
}
read_error:
{
GST_ERROR_OBJECT (src, "Read failed for block %d", src->cur_pack);
return GST_DVD_READ_ERROR;
}
block_read_error:
{
GST_ERROR_OBJECT (src, "Read failed for %d blocks at %d",
cur_output_size, src->cur_pack);
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
return GST_DVD_READ_ERROR;
}
}
/* we don't cache the result on purpose */
static gboolean
gst_dvd_read_descrambler_available (void)
{
GModule *module;
gpointer sym;
gsize res;
module = g_module_open ("libdvdcss", 0);
if (module != NULL) {
res = g_module_symbol (module, "dvdcss_open", &sym);
g_module_close (module);
} else {
res = FALSE;
}
return res;
}
static GstFlowReturn
gst_dvd_read_src_create (GstPushSrc * pushsrc, GstBuffer ** p_buf)
{
GstDvdReadSrc *src = GST_DVD_READ_SRC (pushsrc);
GstPad *srcpad;
gint res;
g_return_val_if_fail (src->dvd != NULL, GST_FLOW_ERROR);
srcpad = GST_BASE_SRC (src)->srcpad;
if (src->need_newsegment) {
GstSegment seg;
gst_segment_init (&seg, GST_FORMAT_BYTES);
seg.start = src->cur_pack * DVD_VIDEO_LB_LEN;
seg.stop = -1;
seg.time = 0;
gst_pad_push_event (srcpad, gst_event_new_segment (&seg));
src->need_newsegment = FALSE;
}
if (src->new_seek) {
gst_dvd_read_src_goto_title (src, src->title, src->angle);
gst_dvd_read_src_goto_chapter (src, src->chapter);
src->new_seek = FALSE;
src->change_cell = TRUE;
}
if (src->title_lang_event_pending) {
gst_pad_push_event (srcpad, src->title_lang_event_pending);
src->title_lang_event_pending = NULL;
}
if (src->pending_clut_event) {
gst_pad_push_event (srcpad, src->pending_clut_event);
src->pending_clut_event = NULL;
}
/* read it in */
do {
res = gst_dvd_read_src_read (src, src->angle, src->change_cell, p_buf);
} while (res == GST_DVD_READ_AGAIN);
switch (res) {
case GST_DVD_READ_ERROR:{
/* FIXME: figure out a way to detect if scrambling is the problem */
if (!gst_dvd_read_descrambler_available ()) {
GST_ELEMENT_ERROR (src, RESOURCE, READ,
(_("Could not read DVD. This may be because the DVD is encrypted "
"and a DVD decryption library is not installed.")), (NULL));
} else {
GST_ELEMENT_ERROR (src, RESOURCE, READ, (_("Could not read DVD.")),
(NULL));
}
return GST_FLOW_ERROR;
}
case GST_DVD_READ_EOS:{
return GST_FLOW_EOS;
}
case GST_DVD_READ_OK:{
src->change_cell = FALSE;
return GST_FLOW_OK;
}
default:
break;
}
g_return_val_if_reached (GST_FLOW_EOS);
}
static void
gst_dvd_read_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstDvdReadSrc *src = GST_DVD_READ_SRC (object);
gboolean started;
GST_OBJECT_LOCK (src);
started = GST_OBJECT_FLAG_IS_SET (src, GST_BASE_SRC_FLAG_STARTED);
switch (prop_id) {
case ARG_DEVICE:{
if (started) {
g_warning ("%s: property '%s' needs to be set before the device is "
"opened", GST_ELEMENT_NAME (src), pspec->name);
break;
}
g_free (src->location);
/* clear the filename if we get a NULL (is that possible?) */
if (g_value_get_string (value) == NULL) {
src->location = g_strdup ("/dev/dvd");
} else {
src->location = g_strdup (g_value_get_string (value));
}
break;
}
case ARG_TITLE:
src->uri_title = g_value_get_int (value);
if (started) {
src->title = src->uri_title - 1;
src->new_seek = TRUE;
}
break;
case ARG_CHAPTER:
src->uri_chapter = g_value_get_int (value);
if (started) {
src->chapter = src->uri_chapter - 1;
src->new_seek = TRUE;
}
break;
case ARG_ANGLE:
src->uri_angle = g_value_get_int (value);
if (started) {
src->angle = src->uri_angle - 1;
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (src);
}
static void
gst_dvd_read_src_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstDvdReadSrc *src = GST_DVD_READ_SRC (object);
GST_OBJECT_LOCK (src);
switch (prop_id) {
case ARG_DEVICE:
g_value_set_string (value, src->location);
break;
case ARG_TITLE:
g_value_set_int (value, src->uri_title);
break;
case ARG_CHAPTER:
g_value_set_int (value, src->uri_chapter);
break;
case ARG_ANGLE:
g_value_set_int (value, src->uri_angle);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (src);
}
static gboolean
gst_dvd_read_src_get_size (GstDvdReadSrc * src, gint64 * size)
{
gboolean ret = FALSE;
if (src->dvd_title) {
gssize blocks;
blocks = DVDFileSize (src->dvd_title);
if (blocks >= 0) {
*size = (gint64) blocks *DVD_VIDEO_LB_LEN;
ret = TRUE;
} else {
GST_WARNING_OBJECT (src, "DVDFileSize(%p) failed!", src->dvd_title);
}
}
return ret;
}
/*** Querying and seeking ***/
static gboolean
gst_dvd_read_src_handle_seek_event (GstDvdReadSrc * src, GstEvent * event)
{
GstSeekFlags flags;
GstSeekType cur_type, end_type;
gint64 new_off, total;
GstFormat format;
GstPad *srcpad;
gboolean query_ok;
gdouble rate;
gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &new_off,
&end_type, NULL);
if (rate <= 0.0) {
GST_DEBUG_OBJECT (src, "cannot do backwards playback yet");
return FALSE;
}
if (end_type != GST_SEEK_TYPE_NONE) {
if ((format != chapter_format && format != GST_FORMAT_TIME) ||
end_type != GST_SEEK_TYPE_SET) {
GST_DEBUG_OBJECT (src, "end seek type not supported");
return FALSE;
}
}
if (cur_type != GST_SEEK_TYPE_SET) {
GST_DEBUG_OBJECT (src, "only SEEK_TYPE_SET is supported");
return FALSE;
}
if (format == angle_format) {
GST_OBJECT_LOCK (src);
if (new_off < 0 || new_off >= src->num_angles) {
GST_OBJECT_UNLOCK (src);
GST_DEBUG_OBJECT (src, "invalid angle %d, only %d available",
src->num_angles, src->num_angles);
return FALSE;
}
src->angle = (gint) new_off;
GST_OBJECT_UNLOCK (src);
GST_DEBUG_OBJECT (src, "switched to angle %d", (gint) new_off + 1);
return TRUE;
}
if (format != chapter_format && format != title_format &&
format != GST_FORMAT_BYTES && format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (src, "unsupported seek format %d (%s)", format,
gst_format_get_name (format));
return FALSE;
}
if (format == GST_FORMAT_BYTES) {
GST_DEBUG_OBJECT (src, "Requested seek to byte %" G_GUINT64_FORMAT,
new_off);
} else if (format == GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (src, "Requested seek to time %" GST_TIME_FORMAT,
GST_TIME_ARGS (new_off));
if (gst_dvd_read_src_get_sector_from_time (src, new_off) < 0) {
GST_DEBUG_OBJECT (src, "Can't find sector for requested time");
return FALSE;
}
}
srcpad = GST_BASE_SRC_PAD (src);
/* check whether the seek looks reasonable (ie within possible range) */
if (format == GST_FORMAT_BYTES) {
GST_OBJECT_LOCK (src);
query_ok = gst_dvd_read_src_get_size (src, &total);
GST_OBJECT_UNLOCK (src);
} else {
query_ok = gst_pad_query_duration (srcpad, format, &total);
}
if (!query_ok) {
GST_DEBUG_OBJECT (src, "Failed to query duration in format %s",
gst_format_get_name (format));
return FALSE;
}
GST_DEBUG_OBJECT (src, "Total %s: %12" G_GINT64_FORMAT,
gst_format_get_name (format), total);
GST_DEBUG_OBJECT (src, "Seek to %s: %12" G_GINT64_FORMAT,
gst_format_get_name (format), new_off);
if (new_off >= total) {
GST_DEBUG_OBJECT (src, "Seek position out of range");
return FALSE;
}
/* set segment to seek format; this allows us to use the do_seek
* virtual function and let the base source handle all the tricky
* stuff for us. We don't use the segment internally anyway */
/* FIXME: can't take the stream lock here - what to do? */
GST_OBJECT_LOCK (src);
GST_BASE_SRC (src)->segment.format = format;
GST_BASE_SRC (src)->segment.start = 0;
GST_BASE_SRC (src)->segment.stop = total;
GST_BASE_SRC (src)->segment.duration = total;
GST_OBJECT_UNLOCK (src);
return GST_BASE_SRC_CLASS (parent_class)->event (GST_BASE_SRC (src), event);
}
static void
gst_dvd_read_src_get_sector_bounds (GstDvdReadSrc * src, gint * first,
gint * last)
{
gint c1, c2, tmp;
cur_title_get_chapter_bounds (src, 0, &c1, &tmp);
cur_title_get_chapter_bounds (src, src->num_chapters - 1, &tmp, &c2);
*first = src->cur_pgc->cell_playback[c1].first_sector;
*last = src->cur_pgc->cell_playback[c2].last_sector;
}
static gboolean
gst_dvd_read_src_do_seek (GstBaseSrc * basesrc, GstSegment * s)
{
GstDvdReadSrc *src;
src = GST_DVD_READ_SRC (basesrc);
GST_DEBUG_OBJECT (src, "Seeking to %s: %12" G_GINT64_FORMAT,
gst_format_get_name (s->format), s->position);
/* Ignore the first seek to 0, as it breaks starting playback
* from another chapter by seeking back to sector 0 */
if (src->first_seek && s->format == GST_FORMAT_BYTES && s->start == 0) {
src->first_seek = FALSE;
return TRUE;
}
if (s->format == sector_format || s->format == GST_FORMAT_BYTES
|| s->format == GST_FORMAT_TIME) {
guint old;
old = src->cur_pack;
if (s->format == sector_format) {
gint first, last;
gst_dvd_read_src_get_sector_bounds (src, &first, &last);
GST_DEBUG_OBJECT (src, "Format is sector, seeking to %" G_GINT64_FORMAT,
s->position);
src->cur_pack = s->position;
if (src->cur_pack < first)
src->cur_pack = first;
if (src->cur_pack > last)
src->cur_pack = last;
} else if (s->format == GST_FORMAT_TIME) {
gint sector;
GST_DEBUG_OBJECT (src, "Format is time");
sector = gst_dvd_read_src_get_sector_from_time (src, s->position);
GST_DEBUG_OBJECT (src, "Time %" GST_TIME_FORMAT " => sector %d",
GST_TIME_ARGS (s->position), sector);
/* really shouldn't happen, we've checked this earlier ... */
g_return_val_if_fail (sector >= 0, FALSE);
src->cur_pack = sector;
} else {
/* byte format */
gint first, last;
gst_dvd_read_src_get_sector_bounds (src, &first, &last);
GST_DEBUG_OBJECT (src, "Format is byte");
src->cur_pack = s->position / DVD_VIDEO_LB_LEN;
if (((gint64) src->cur_pack * DVD_VIDEO_LB_LEN) != s->position) {
GST_LOG_OBJECT (src, "rounded down offset %" G_GINT64_FORMAT " => %"
G_GINT64_FORMAT, s->position,
(gint64) src->cur_pack * DVD_VIDEO_LB_LEN);
}
src->cur_pack += first;
}
if (!gst_dvd_read_src_goto_sector (src, src->angle)) {
GST_DEBUG_OBJECT (src, "seek to sector 0x%08x failed", src->cur_pack);
src->cur_pack = old;
return FALSE;
}
GST_LOG_OBJECT (src, "seek to sector 0x%08x ok", src->cur_pack);
} else if (s->format == chapter_format) {
if (!gst_dvd_read_src_goto_chapter (src, (gint) s->position)) {
GST_DEBUG_OBJECT (src, "seek to chapter %d failed",
(gint) s->position + 1);
return FALSE;
}
GST_INFO_OBJECT (src, "seek to chapter %d ok", (gint) s->position + 1);
src->chapter = s->position;
} else if (s->format == title_format) {
if (!gst_dvd_read_src_goto_title (src, (gint) s->position, src->angle) ||
!gst_dvd_read_src_goto_chapter (src, 0)) {
GST_DEBUG_OBJECT (src, "seek to title %d failed", (gint) s->position);
return FALSE;
}
src->title = (gint) s->position;
src->chapter = 0;
GST_INFO_OBJECT (src, "seek to title %d ok", src->title + 1);
} else {
g_return_val_if_reached (FALSE);
}
src->need_newsegment = TRUE;
return TRUE;
}
static gboolean
gst_dvd_read_src_src_event (GstBaseSrc * basesrc, GstEvent * event)
{
GstDvdReadSrc *src = GST_DVD_READ_SRC (basesrc);
gboolean res;
GST_LOG_OBJECT (src, "handling %s event", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
res = gst_dvd_read_src_handle_seek_event (src, event);
break;
default:
res = GST_BASE_SRC_CLASS (parent_class)->event (basesrc, event);
break;
}
return res;
}
static GstEvent *
gst_dvd_read_src_make_clut_change_event (GstDvdReadSrc * src,
const guint * clut)
{
GstStructure *structure;
gchar name[16];
gint i;
structure = gst_structure_new ("application/x-gst-dvd",
"event", G_TYPE_STRING, "dvd-spu-clut-change", NULL);
/* Create a separate field for each value in the table. */
for (i = 0; i < 16; i++) {
g_snprintf (name, sizeof (name), "clut%02d", i);
gst_structure_set (structure, name, G_TYPE_INT, (int) clut[i], NULL);
}
/* Create the DVD event and put the structure into it. */
return gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM, structure);
}
static gint64
gst_dvd_read_src_convert_timecode (dvd_time_t * time)
{
gint64 ret_time;
const gint64 one_hour = 3600 * GST_SECOND;
const gint64 one_min = 60 * GST_SECOND;
g_return_val_if_fail ((time->hour >> 4) < 0xa
&& (time->hour & 0xf) < 0xa, -1);
g_return_val_if_fail ((time->minute >> 4) < 0x7
&& (time->minute & 0xf) < 0xa, -1);
g_return_val_if_fail ((time->second >> 4) < 0x7
&& (time->second & 0xf) < 0xa, -1);
ret_time = ((time->hour >> 4) * 10 + (time->hour & 0xf)) * one_hour;
ret_time += ((time->minute >> 4) * 10 + (time->minute & 0xf)) * one_min;
ret_time += ((time->second >> 4) * 10 + (time->second & 0xf)) * GST_SECOND;
return ret_time;
}
static gboolean
gst_dvd_read_src_do_duration_query (GstDvdReadSrc * src, GstQuery * query)
{
GstFormat format;
gint64 val;
gst_query_parse_duration (query, &format, NULL);
switch (format) {
case GST_FORMAT_TIME:{
if (src->cur_pgc == NULL)
return FALSE;
val = gst_dvd_read_src_convert_timecode (&src->cur_pgc->playback_time);
if (val < 0)
return FALSE;
break;
}
case GST_FORMAT_BYTES:{
if (!gst_dvd_read_src_get_size (src, &val))
return FALSE;
break;
}
default:{
if (format == sector_format) {
val = DVDFileSize (src->dvd_title);
} else if (format == title_format) {
val = src->tt_srpt->nr_of_srpts;
} else if (format == chapter_format) {
val = src->num_chapters;
} else if (format == angle_format) {
val = src->tt_srpt->title[src->title].nr_of_angles;
} else {
GST_DEBUG_OBJECT (src, "Don't know how to handle format %d (%s)",
format, gst_format_get_name (format));
return FALSE;
}
break;
}
}
GST_LOG_OBJECT (src, "duration = %" G_GINT64_FORMAT " %s", val,
gst_format_get_name (format));
gst_query_set_duration (query, format, val);
return TRUE;
}
static gboolean
gst_dvd_read_src_do_position_query (GstDvdReadSrc * src, GstQuery * query)
{
GstFormat format;
gint64 val;
gst_query_parse_position (query, &format, NULL);
switch (format) {
case GST_FORMAT_BYTES:{
val = (gint64) src->cur_pack * DVD_VIDEO_LB_LEN;
break;
}
default:{
if (format == sector_format) {
val = src->cur_pack;
} else if (format == title_format) {
val = src->title;
} else if (format == chapter_format) {
val = src->chapter;
} else if (format == angle_format) {
val = src->angle;
} else {
GST_DEBUG_OBJECT (src, "Don't know how to handle format %d (%s)",
format, gst_format_get_name (format));
return FALSE;
}
break;
}
}
GST_LOG_OBJECT (src, "position = %" G_GINT64_FORMAT " %s", val,
gst_format_get_name (format));
gst_query_set_position (query, format, val);
return TRUE;
}
static gboolean
gst_dvd_read_src_do_convert_query (GstDvdReadSrc * src, GstQuery * query)
{
GstFormat src_format, dest_format;
gboolean ret = FALSE;
gint64 src_val, dest_val = -1;
gst_query_parse_convert (query, &src_format, &src_val, &dest_format, NULL);
if (src_format == dest_format) {
dest_val = src_val;
ret = TRUE;
goto done;
}
/* Formats to consider: TIME, DEFAULT, BYTES, title, chapter, sector.
* Note: title and chapter are counted as starting from 0 here, just like
* in the context of seek events. Another note: DEFAULT format is undefined */
if (src_format == GST_FORMAT_BYTES) {
src_format = sector_format;
src_val /= DVD_VIDEO_LB_LEN;
}
if (src_format == sector_format) {
/* SECTOR => xyz */
if (dest_format == GST_FORMAT_TIME && src_val < G_MAXUINT) {
dest_val = gst_dvd_read_src_get_time_for_sector (src, (guint) src_val);
ret = (dest_val >= 0);
} else if (dest_format == GST_FORMAT_BYTES) {
dest_val = src_val * DVD_VIDEO_LB_LEN;
ret = TRUE;
} else {
ret = FALSE;
}
} else if (src_format == title_format) {
/* TITLE => xyz */
if (dest_format == GST_FORMAT_TIME) {
/* not really true, but we use this to trick the base source into
* handling seeks in title-format for us (the source won't know that
* we changed the title in this case) (changing titles should really
* be done with an interface rather than a seek, but for now we're
* stuck with this mechanism. Fix in 0.11) */
dest_val = (GstClockTime) 0;
ret = TRUE;
} else {
ret = FALSE;
}
} else if (src_format == chapter_format) {
/* CHAPTER => xyz */
if (dest_format == GST_FORMAT_TIME) {
if (src->num_chapters >= 0 && src_val < src->num_chapters) {
dest_val = src->chapter_starts[src_val];
ret = TRUE;
}
} else if (dest_format == sector_format) {
} else {
ret = FALSE;
}
} else if (src_format == GST_FORMAT_TIME) {
/* TIME => xyz */
if (dest_format == sector_format || dest_format == GST_FORMAT_BYTES) {
dest_val = gst_dvd_read_src_get_sector_from_time (src, src_val);
ret = (dest_val >= 0);
if (dest_format == GST_FORMAT_BYTES)
dest_val *= DVD_VIDEO_LB_LEN;
} else if (dest_format == chapter_format) {
if (src->chapter_starts != NULL) {
gint i;
for (i = src->num_chapters - 1; i >= 0; --i) {
if (src->chapter_starts && src->chapter_starts[i] >= src_val) {
dest_val = i;
ret = TRUE;
break;
}
}
} else {
ret = FALSE;
}
} else {
ret = FALSE;
}
} else {
ret = FALSE;
}
done:
if (ret) {
gst_query_set_convert (query, src_format, src_val, dest_format, dest_val);
}
return ret;
}
static gboolean
gst_dvd_read_src_src_query (GstBaseSrc * basesrc, GstQuery * query)
{
GstDvdReadSrc *src = GST_DVD_READ_SRC (basesrc);
gboolean res = TRUE;
GST_LOG_OBJECT (src, "handling %s query", GST_QUERY_TYPE_NAME (query));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:
GST_OBJECT_LOCK (src);
if (GST_OBJECT_FLAG_IS_SET (src, GST_BASE_SRC_FLAG_STARTED)) {
res = gst_dvd_read_src_do_duration_query (src, query);
} else {
GST_DEBUG_OBJECT (src, "query failed: not started");
res = FALSE;
}
GST_OBJECT_UNLOCK (src);
break;
case GST_QUERY_POSITION:
GST_OBJECT_LOCK (src);
if (GST_OBJECT_FLAG_IS_SET (src, GST_BASE_SRC_FLAG_STARTED)) {
res = gst_dvd_read_src_do_position_query (src, query);
} else {
GST_DEBUG_OBJECT (src, "query failed: not started");
res = FALSE;
}
GST_OBJECT_UNLOCK (src);
break;
case GST_QUERY_CONVERT:
GST_OBJECT_LOCK (src);
if (GST_OBJECT_FLAG_IS_SET (src, GST_BASE_SRC_FLAG_STARTED)) {
res = gst_dvd_read_src_do_convert_query (src, query);
} else {
GST_DEBUG_OBJECT (src, "query failed: not started");
res = FALSE;
}
GST_OBJECT_UNLOCK (src);
break;
default:
res = GST_BASE_SRC_CLASS (parent_class)->query (basesrc, query);
break;
}
return res;
}
static gboolean
gst_dvd_read_src_goto_sector (GstDvdReadSrc * src, int angle)
{
gint seek_to = src->cur_pack;
gint chapter, next, cur, i;
/* retrieve position */
src->cur_pack = 0;
GST_DEBUG_OBJECT (src, "Goto sector %d, angle %d, within %d chapters",
seek_to, angle, src->num_chapters);
for (i = 0; i < src->num_chapters; i++) {
gint c1, c2;
cur_title_get_chapter_bounds (src, i, &c1, &c2);
GST_DEBUG_OBJECT (src, " Looking in chapter %d, bounds: %d %d", i, c1, c2);
for (next = cur = c1; cur < c2;) {
gint first = src->cur_pgc->cell_playback[cur].first_sector;
gint last = src->cur_pgc->cell_playback[cur].last_sector;
GST_DEBUG_OBJECT (src, "Cell %d sector bounds: %d %d", cur, first, last);
cur = next;
if (src->cur_pgc->cell_playback[cur].block_type == BLOCK_TYPE_ANGLE_BLOCK)
cur += angle;
next = gst_dvd_read_src_get_next_cell (src, src->cur_pgc, cur);
/* seeking to 0 should end up at first chapter in any case */
if ((seek_to >= first && seek_to <= last) || (seek_to == 0 && i == 0)) {
GST_DEBUG_OBJECT (src, "Seek target found in chapter %d", i);
chapter = i;
goto done;
}
}
}
GST_DEBUG_OBJECT (src, "Seek to sector %u failed", seek_to);
return FALSE;
done:
{
/* so chapter $chapter and cell $cur contain our sector
* of interest. Let's go there! */
GST_INFO_OBJECT (src, "Seek succeeded, going to chapter %u, cell %u",
chapter + 1, cur);
gst_dvd_read_src_goto_chapter (src, chapter);
src->cur_cell = cur;
src->next_cell = next;
src->new_cell = FALSE;
src->cur_pack = seek_to;
return TRUE;
}
}
/*** URI interface ***/
static GstURIType
gst_dvd_read_src_uri_get_type (GType type)
{
return GST_URI_SRC;
}
static const gchar *const *
gst_dvd_read_src_uri_get_protocols (GType type)
{
static const gchar *protocols[] = { "dvd", NULL };
return protocols;
}
static gchar *
gst_dvd_read_src_uri_get_uri (GstURIHandler * handler)
{
GstDvdReadSrc *src = GST_DVD_READ_SRC (handler);
gchar *uri;
GST_OBJECT_LOCK (src);
uri = g_strdup_printf ("dvd://%d,%d,%d", src->uri_title, src->uri_chapter,
src->uri_angle);
GST_OBJECT_UNLOCK (src);
return uri;
}
static gboolean
gst_dvd_read_src_uri_set_uri (GstURIHandler * handler, const gchar * uri,
GError ** error)
{
GstDvdReadSrc *src = GST_DVD_READ_SRC (handler);
/* parse out the new t/c/a and seek to them */
{
gchar *location = NULL;
gchar **strs;
gchar **strcur;
gint pos = 0;
location = gst_uri_get_location (uri);
GST_OBJECT_LOCK (src);
src->uri_title = 1;
src->uri_chapter = 1;
src->uri_angle = 1;
if (!location)
goto empty_location;
strcur = strs = g_strsplit (location, ",", 0);
while (strcur && *strcur) {
gint val;
if (!sscanf (*strcur, "%d", &val))
break;
if (val <= 0) {
g_warning ("Invalid value %d in URI '%s'. Must be 1 or greater",
val, location);
break;
}
switch (pos) {
case 0:
src->uri_title = val;
break;
case 1:
src->uri_chapter = val;
break;
case 2:
src->uri_angle = val;
break;
}
strcur++;
pos++;
}
if (pos > 0 && GST_OBJECT_FLAG_IS_SET (src, GST_BASE_SRC_FLAG_STARTED)) {
src->title = src->uri_title - 1;
src->chapter = src->uri_chapter - 1;
src->angle = src->uri_angle - 1;
src->new_seek = TRUE;
}
g_strfreev (strs);
g_free (location);
empty_location:
GST_OBJECT_UNLOCK (src);
}
return TRUE;
}
static void
gst_dvd_read_src_uri_handler_init (gpointer g_iface, gpointer iface_data)
{
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
iface->get_type = gst_dvd_read_src_uri_get_type;
iface->get_protocols = gst_dvd_read_src_uri_get_protocols;
iface->get_uri = gst_dvd_read_src_uri_get_uri;
iface->set_uri = gst_dvd_read_src_uri_set_uri;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gstgst_dvd_read_src_debug, "dvdreadsrc", 0,
"DVD reader element based on dvdreadsrc");
#ifdef ENABLE_NLS
GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
LOCALEDIR);
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
#endif /* ENABLE_NLS */
if (!gst_element_register (plugin, "dvdreadsrc", GST_RANK_NONE,
GST_TYPE_DVD_READ_SRC)) {
return FALSE;
}
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
dvdread,
"Access a DVD with dvdread",
plugin_init, VERSION, "GPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
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