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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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204 lines
5.4 KiB
C
204 lines
5.4 KiB
C
/* gstcdplay
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* Copyright (c) 2002 Charles Schmidt <cbschmid@uiuc.edu>
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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gboolean cd_init(struct cd *cd,const gchar *device)
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{
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struct cdrom_tochdr toc_header;
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struct cdrom_tocentry toc_entry;
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guint i;
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cd->fd = open(device,O_RDONLY | O_NONBLOCK);
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if (cd->fd == -1) {
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return FALSE;
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}
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/* get the toc header information */
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if (ioctl(cd->fd,CDROMREADTOCHDR,&toc_header) != 0) {
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close(cd->fd);
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cd->fd = -1;
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return FALSE;
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}
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/* read each entry in the toc header */
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for (i = 1; i <= toc_header.cdth_trk1; i++) {
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toc_entry.cdte_format = CDROM_MSF;
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toc_entry.cdte_track = i;
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if (ioctl(cd->fd,CDROMREADTOCENTRY,&toc_entry) != 0) {
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close(cd->fd);
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cd->fd = -1;
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return FALSE;
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}
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cd->tracks[i].minute = toc_entry.cdte_addr.msf.minute;
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cd->tracks[i].second = toc_entry.cdte_addr.msf.second;
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cd->tracks[i].frame = toc_entry.cdte_addr.msf.frame;
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cd->tracks[i].data_track = (toc_entry.cdte_ctrl == CDROM_DATA_TRACK);
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}
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/* read the leadout */
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toc_entry.cdte_track = CDROM_LEADOUT;
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toc_entry.cdte_format = CDROM_MSF;
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if (ioctl(cd->fd,CDROMREADTOCENTRY,&toc_entry) != 0) {
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close(cd->fd);
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cd->fd = -1;
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return FALSE;
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}
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cd->tracks[LEADOUT].minute = toc_entry.cdte_addr.msf.minute;
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cd->tracks[LEADOUT].second = toc_entry.cdte_addr.msf.second;
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cd->tracks[LEADOUT].frame = toc_entry.cdte_addr.msf.frame;
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cd->num_tracks = toc_header.cdth_trk1;
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return TRUE;
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}
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gboolean cd_start(struct cd *cd,gint start_track,gint end_track)
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{
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struct cdrom_msf msf;
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if (cd->fd == -1) {
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return FALSE;
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}
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cd_fix_track_range(cd,&start_track,&end_track);
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msf.cdmsf_min0 = cd->tracks[start_track].minute;
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msf.cdmsf_sec0 = cd->tracks[start_track].second;
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msf.cdmsf_frame0 = cd->tracks[start_track].frame;
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if (end_track == LEADOUT) {
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msf.cdmsf_min1 = cd->tracks[end_track].minute;
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msf.cdmsf_sec1 = cd->tracks[end_track].second;
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msf.cdmsf_frame1 = cd->tracks[end_track].frame;
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} else {
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msf.cdmsf_min1 = cd->tracks[end_track+1].minute;
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msf.cdmsf_sec1 = cd->tracks[end_track+1].second;
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msf.cdmsf_frame1 = cd->tracks[end_track+1].frame;
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}
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if (ioctl(cd->fd,CDROMPLAYMSF,&msf) != 0) {
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return FALSE;
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}
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return TRUE;
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}
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gboolean cd_pause(struct cd *cd)
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{
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if (cd->fd == -1) {
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return FALSE;
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}
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if (ioctl(cd->fd,CDROMPAUSE,NULL) != 0) {
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return FALSE;
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}
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return TRUE;
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}
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gboolean cd_resume(struct cd *cd)
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{
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if (cd->fd == -1) {
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return FALSE;
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}
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if (ioctl(cd->fd,CDROMRESUME,NULL) != 0) {
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return FALSE;
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}
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return TRUE;
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}
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gboolean cd_stop(struct cd *cd)
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{
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if (cd->fd == -1) {
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return FALSE;
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}
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if (ioctl(cd->fd,CDROMSTOP,NULL) != 0) {
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return FALSE;
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}
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return TRUE;
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}
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/* -1 for error, 0 for not playing, 1 for playing */
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CDStatus cd_status(struct cd *cd)
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{
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struct cdrom_subchnl sub_channel;
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if (cd->fd == -1) {
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return -1;
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}
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sub_channel.cdsc_format = CDROM_MSF;
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if (ioctl(cd->fd,CDROMSUBCHNL,&sub_channel) != 0) {
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return -1;
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}
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switch (sub_channel.cdsc_audiostatus) {
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case CDROM_AUDIO_COMPLETED:
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return CD_COMPLETED;
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break;
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case CDROM_AUDIO_PLAY:
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case CDROM_AUDIO_PAUSED:
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return CD_PLAYING;
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break;
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case CDROM_AUDIO_ERROR:
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default:
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return CD_ERROR;
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}
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}
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gint cd_current_track(struct cd *cd)
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{
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struct cdrom_subchnl sub_channel;
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if (cd->fd == -1) {
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return -1;
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}
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sub_channel.cdsc_format = CDROM_MSF;
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if (ioctl(cd->fd,CDROMSUBCHNL,&sub_channel) != 0) {
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return -1;
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}
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return sub_channel.cdsc_trk;
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}
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gboolean cd_close(struct cd *cd)
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{
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if (cd->fd == -1) {
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return TRUE;
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}
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if (close(cd->fd) != 0) {
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return FALSE;
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}
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cd->fd = -1;
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return TRUE;
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}
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