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ea817cbc2c
* Also fix a memory leak introduced vy v0.93 in cdio_free()
420 lines
11 KiB
C
420 lines
11 KiB
C
/*
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Copyright (C) 2003-2005, 2008, 2011-2013
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Rocky Bernstein <rocky@gnu.org>
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Copyright (C) 2001 Herbert Valerio Riedel <hvr@gnu.org>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*! Track-related routines. */
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_STDBOOL_H
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# include <stdbool.h>
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#endif
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#include <cdio/cdio.h>
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#include <cdio/logging.h>
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#include "cdio_private.h"
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const char *track_format2str[6] =
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{
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"audio", "CD-i", "XA", "data", "PSX", "error"
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};
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/* Variables to hold debugger-helping enumerations */
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enum cdio_track_enums;
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/*!
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Return the number of the first track.
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CDIO_INVALID_TRACK is returned on error.
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*/
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track_t
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cdio_get_first_track_num(const CdIo_t *p_cdio)
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{
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if (NULL == p_cdio) {
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cdio_info("Null CdIo object passed\n");
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return CDIO_INVALID_TRACK;
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}
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if (p_cdio->op.get_first_track_num) {
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return p_cdio->op.get_first_track_num (p_cdio->env);
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} else {
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return CDIO_INVALID_TRACK;
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}
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}
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/*!
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Return the last track number.
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CDIO_INVALID_TRACK is returned on error.
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*/
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track_t
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cdio_get_last_track_num (const CdIo_t *p_cdio)
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{
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if (NULL == p_cdio) {
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cdio_info("Null CdIo object passed\n");
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return CDIO_INVALID_TRACK;
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}
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{
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const track_t i_first_track = cdio_get_first_track_num(p_cdio);
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if ( CDIO_INVALID_TRACK != i_first_track ) {
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const track_t u_tracks = cdio_get_num_tracks(p_cdio);
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if ( CDIO_INVALID_TRACK != u_tracks )
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return i_first_track + u_tracks - 1;
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}
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return CDIO_INVALID_TRACK;
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}
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}
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/*! Return number of channels in track: 2 or 4; -2 if not
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implemented or -1 for error.
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Not meaningful if track is not an audio track.
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*/
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int
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cdio_get_track_channels(const CdIo_t *p_cdio, track_t u_track)
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{
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track_t u_last_track;
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if (NULL == p_cdio) {
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cdio_info("Null CdIo object passed\n");
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return -1;
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}
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u_last_track = cdio_get_last_track_num(p_cdio);
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if (u_track > u_last_track) {
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cdio_log(CDIO_LOG_WARN, "Number of tracks exceeds maximum (%d vs. %d)\n",
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u_track, u_last_track);
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return -1;
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}
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if (p_cdio->op.get_track_channels) {
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return p_cdio->op.get_track_channels (p_cdio->env, u_track);
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} else {
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return -2;
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}
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}
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/*! Return copy protection status on a track. Is this meaningful
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if not an audio track?
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*/
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track_flag_t
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cdio_get_track_copy_permit(const CdIo_t *p_cdio, track_t u_track)
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{
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if (p_cdio->op.get_track_copy_permit) {
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return p_cdio->op.get_track_copy_permit (p_cdio->env, u_track);
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} else {
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return CDIO_TRACK_FLAG_UNKNOWN;
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}
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}
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/*!
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Get format of track.
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*/
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track_format_t
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cdio_get_track_format(const CdIo_t *p_cdio, track_t u_track)
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{
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if (!p_cdio) return TRACK_FORMAT_ERROR;
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if (p_cdio->op.get_track_format) {
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return p_cdio->op.get_track_format (p_cdio->env, u_track);
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} else {
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return TRACK_FORMAT_ERROR;
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}
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}
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/*!
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Return the Joliet level recognized for p_cdio.
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*/
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uint8_t
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cdio_get_joliet_level(const CdIo_t *p_cdio)
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{
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if (!p_cdio) return 0;
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{
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const generic_img_private_t *p_env
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= (generic_img_private_t *) (p_cdio->env);
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return p_env->u_joliet_level;
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}
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}
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/*!
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Return the number of tracks in the current medium.
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CDIO_INVALID_TRACK is returned on error.
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*/
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track_t
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cdio_get_num_tracks (const CdIo_t *p_cdio)
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{
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if (p_cdio == NULL) return CDIO_INVALID_TRACK;
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if (p_cdio->op.get_num_tracks) {
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return p_cdio->op.get_num_tracks (p_cdio->env);
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} else {
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return CDIO_INVALID_TRACK;
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}
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}
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/*! Find the track which contans lsn.
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CDIO_INVALID_TRACK is returned if the lsn outside of the CD or
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if there was some error.
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If the lsn is before the pregap of the first track 0 is returned.
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Otherwise we return the track that spans the lsn.
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*/
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track_t
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cdio_get_track(const CdIo_t *p_cdio, lsn_t lsn)
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{
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if (!p_cdio) return CDIO_INVALID_TRACK;
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{
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track_t i_low_track = cdio_get_first_track_num(p_cdio);
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track_t i_high_track = cdio_get_last_track_num(p_cdio)+1;
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track_t i_lead_track = i_high_track;
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if (CDIO_INVALID_TRACK == i_low_track
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|| CDIO_INVALID_TRACK == i_high_track ) return CDIO_INVALID_TRACK;
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if (lsn < cdio_get_track_lsn(p_cdio, i_low_track))
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return 0; /* We're in the pre-gap of first track */
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if (lsn > cdio_get_track_lsn(p_cdio, CDIO_CDROM_LEADOUT_TRACK))
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return CDIO_INVALID_TRACK; /* We're beyond the end. */
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do {
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const track_t i_mid = (i_low_track + i_high_track) / 2;
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const lsn_t i_mid_lsn = cdio_get_track_lsn(p_cdio, i_mid);
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if (lsn <= i_mid_lsn) i_high_track = i_mid - 1;
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if (lsn >= i_mid_lsn) i_low_track = i_mid + 1;
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} while ( i_low_track <= i_high_track );
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if (i_low_track > i_high_track + 1) {
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i_high_track++;
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}
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if (i_high_track == i_lead_track ) {
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return CDIO_CDROM_LEADOUT_TRACK;
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} else {
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return i_high_track;
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}
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}
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}
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/*!
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Return true if we have XA data (green, mode2 form1) or
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XA data (green, mode2 form2). That is track begins:
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sync - header - subheader
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12 4 - 8
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FIXME: there's gotta be a better design for this and get_track_format?
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*/
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bool
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cdio_get_track_green(const CdIo_t *p_cdio, track_t u_track)
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{
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if (p_cdio == NULL) {
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return false;
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}
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if (p_cdio->op.get_track_green) {
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return p_cdio->op.get_track_green (p_cdio->env, u_track);
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} else {
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return false;
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}
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}
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/*!
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Return the starting LBA for track number
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track_num in cdio. Tracks numbers start at 1.
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The "leadout" track is specified either by
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using track_num LEADOUT_TRACK or the total tracks+1.
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CDIO_INVALID_LBA is returned on error.
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*/
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lba_t
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cdio_get_track_lba(const CdIo_t *p_cdio, track_t u_track)
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{
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if (NULL == p_cdio) {
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cdio_info("Null CdIo object passed\n");
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return CDIO_INVALID_LBA;
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}
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if (p_cdio->op.get_track_lba) {
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return p_cdio->op.get_track_lba (p_cdio->env, u_track);
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} else {
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msf_t msf;
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if (p_cdio->op.get_track_msf)
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if (cdio_get_track_msf(p_cdio, u_track, &msf))
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return cdio_msf_to_lba(&msf);
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return CDIO_INVALID_LBA;
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}
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}
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/*!
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Return the starting LSN for track number
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u_track in cdio. Tracks numbers start at 1.
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The "leadout" track is specified either by
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using u_track LEADOUT_TRACK or the total tracks+1.
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CDIO_INVALID_LSN is returned on error.
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*/
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lsn_t
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cdio_get_track_lsn(const CdIo_t *p_cdio, track_t u_track)
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{
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/*track_t u_last_track; */
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if (NULL == p_cdio) {
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cdio_info("Null CdIo object passed\n");
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return CDIO_INVALID_LSN;
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}
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/*
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u_last_track = cdio_get_last_track_num(p_cdio);
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if (u_track > u_last_track && u_track != CDIO_CDROM_LEADOUT_TRACK) {
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cdio_log(CDIO_LOG_WARN, "Number of tracks exceeds maximum (%d vs. %d)\n",
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u_track, u_last_track);
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return CDIO_INVALID_LSN;
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}
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*/
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if (p_cdio->op.get_track_lba) {
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return cdio_lba_to_lsn(p_cdio->op.get_track_lba (p_cdio->env, u_track));
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} else {
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msf_t msf;
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if (cdio_get_track_msf(p_cdio, u_track, &msf))
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return cdio_msf_to_lsn(&msf);
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return CDIO_INVALID_LSN;
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}
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}
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/*!
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Return the International Standard Recording Code (ISRC) for track number
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u_track in p_cdio. Track numbers start at 1.
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Note: The caller must free the returned string with cdio_free()
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when done with it.
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*/
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char *
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cdio_get_track_isrc (const CdIo_t *p_cdio, track_t u_track)
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{
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track_t u_last_track;
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if (NULL == p_cdio) {
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cdio_info("Null CdIo object passed\n");
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return NULL;
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}
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u_last_track = cdio_get_last_track_num(p_cdio);
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if (u_track > u_last_track) {
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cdio_log(CDIO_LOG_WARN, "Number of tracks exceeds maximum (%d vs. %d)\n",
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u_track, u_last_track);
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return NULL;
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}
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if (p_cdio->op.get_track_isrc) {
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return p_cdio->op.get_track_isrc (p_cdio->env, u_track);
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} else {
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return NULL;
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}
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}
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/*!
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Return the starting LBA for the pregap for track number
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u_track in cdio. Track numbers start at 1.
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CDIO_INVALID_LBA is returned on error.
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*/
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lba_t
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cdio_get_track_pregap_lba(const CdIo_t *p_cdio, track_t u_track)
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{
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if (NULL == p_cdio) {
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cdio_info("Null CdIo object passed\n");
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return CDIO_INVALID_LBA;
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}
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if (p_cdio->op.get_track_pregap_lba) {
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return p_cdio->op.get_track_pregap_lba (p_cdio->env, u_track);
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} else {
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return CDIO_INVALID_LBA;
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}
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}
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/*!
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Return the starting LSN for the pregap for track number
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u_track in cdio. Track numbers start at 1.
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CDIO_INVALID_LSN is returned on error.
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*/
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lsn_t
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cdio_get_track_pregap_lsn(const CdIo_t *p_cdio, track_t u_track)
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{
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return cdio_lba_to_lsn(cdio_get_track_pregap_lba(p_cdio, u_track));
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}
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/*!
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Return the ending LSN for track number
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u_track in cdio. CDIO_INVALID_LSN is returned on error.
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*/
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lsn_t
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cdio_get_track_last_lsn(const CdIo_t *p_cdio, track_t u_track)
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{
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lsn_t lsn = cdio_get_track_lsn(p_cdio, u_track+1);
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if (CDIO_INVALID_LSN == lsn) return CDIO_INVALID_LSN;
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/* Safe, we've always the leadout. */
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return lsn - 1;
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}
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/*!
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Return the starting MSF (minutes/secs/frames) for track number
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u_track in cdio. Track numbers start at 1.
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The "leadout" track is specified either by
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using u_track LEADOUT_TRACK or the total tracks+1.
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False is returned if there is no track entry.
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*/
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bool
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cdio_get_track_msf(const CdIo_t *p_cdio, track_t u_track, /*out*/ msf_t *msf)
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{
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if (!p_cdio) return false;
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if (p_cdio->op.get_track_msf) {
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return p_cdio->op.get_track_msf (p_cdio->env, u_track, msf);
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} else if (p_cdio->op.get_track_lba) {
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lba_t lba = p_cdio->op.get_track_lba (p_cdio->env, u_track);
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if (lba == CDIO_INVALID_LBA) return false;
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cdio_lba_to_msf(lba, msf);
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return true;
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} else {
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return false;
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}
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}
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/*! Return copy protection status on a track. Is this meaningful
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if not an audio track?
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*/
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track_flag_t
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cdio_get_track_preemphasis(const CdIo *p_cdio, track_t u_track)
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{
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if (p_cdio->op.get_track_preemphasis) {
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return p_cdio->op.get_track_preemphasis (p_cdio->env, u_track);
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} else {
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return CDIO_TRACK_FLAG_UNKNOWN;
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}
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}
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/*!
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Return the number of sectors between this track an the next. This
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includes any pregap sectors before the start of the next track.
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Tracks start at 1.
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0 is returned if there is an error.
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*/
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unsigned int
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cdio_get_track_sec_count(const CdIo_t *p_cdio, track_t u_track)
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{
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const track_t u_tracks = cdio_get_num_tracks(p_cdio);
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if (u_track >=1 && u_track <= u_tracks)
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return ( cdio_get_track_lba(p_cdio, u_track+1)
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- cdio_get_track_lba(p_cdio, u_track) );
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return 0;
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}
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