mirror of
https://github.com/mpv-player/mpv
synced 2024-12-25 16:33:02 +00:00
e3c20bf350
stream.start_pos was needed for optical media only, and (apparently) not for very good reasons. Just get rid of it. For stream_dvd, we don't need to do anything. Byte seeking was already removed from it earlier. For stream_cdda and stream_vcd, emulate the start_pos by offsetting the stream pos as seen by the rest of mpv. The bits in discnav.c and loadfile.c were for dealing with the code seeking back to the start in demux.c. Handle this differently by assuming the demuxer is always initialized with the stream at start position, and instead seek back if initializing the demuxer fails. Remove the --sb option, which worked by modifying stream.start_pos. If someone really wants this option, it could be added back by creating a "slice" stream (actually ffmpeg already has such a thing).
227 lines
6.2 KiB
C
227 lines
6.2 KiB
C
/*
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* This file is part of MPlayer.
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*
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* MPlayer 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 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer 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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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPLAYER_VCD_READ_H
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#define MPLAYER_VCD_READ_H
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <libavutil/intreadwrite.h>
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#include "common/msg.h"
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#include "stream.h"
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//=================== VideoCD ==========================
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typedef struct mp_vcd_priv_st mp_vcd_priv_t;
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#ifdef sun
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#include <sys/cdio.h>
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static int sun_vcd_read(mp_vcd_priv_t*, int*);
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#elif defined(__bsdi__)
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#include <dvd.h>
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#else
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#include <linux/cdrom.h>
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#endif
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struct mp_vcd_priv_st {
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int start;
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stream_t *stream;
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int fd;
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struct cdrom_tocentry entry;
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char buf[VCD_SECTOR_SIZE];
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struct cdrom_tochdr tochdr;
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};
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static inline void vcd_set_msf(mp_vcd_priv_t* vcd, unsigned int sect){
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sect += 150;
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vcd->entry.cdte_addr.msf.frame=sect%75;
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sect=sect/75;
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vcd->entry.cdte_addr.msf.second=sect%60;
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sect=sect/60;
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vcd->entry.cdte_addr.msf.minute=sect;
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}
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static inline unsigned int vcd_get_msf(mp_vcd_priv_t* vcd){
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return vcd->entry.cdte_addr.msf.frame +
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(vcd->entry.cdte_addr.msf.second+
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vcd->entry.cdte_addr.msf.minute*60)*75 - 150;
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}
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static int vcd_seek_to_track(mp_vcd_priv_t* vcd, int track)
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{
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vcd->entry.cdte_format = CDROM_MSF;
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vcd->entry.cdte_track = track;
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if (ioctl(vcd->fd, CDROMREADTOCENTRY, &vcd->entry)) {
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MP_ERR(vcd->stream, "ioctl dif1: %s\n",strerror(errno));
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return -1;
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}
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return VCD_SECTOR_DATA*vcd_get_msf(vcd);
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}
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static int vcd_get_track_end(mp_vcd_priv_t* vcd,int track){
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vcd->entry.cdte_format = CDROM_MSF;
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vcd->entry.cdte_track = track<vcd->tochdr.cdth_trk1?(track+1):CDROM_LEADOUT;
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if (ioctl(vcd->fd, CDROMREADTOCENTRY, &vcd->entry)) {
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MP_ERR(vcd->stream, "ioctl dif2: %s\n",strerror(errno));
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return -1;
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}
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return VCD_SECTOR_DATA*vcd_get_msf(vcd);
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}
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static mp_vcd_priv_t* vcd_read_toc(stream_t *stream, int fd){
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struct cdrom_tochdr tochdr;
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mp_vcd_priv_t* vcd;
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int i;
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if (ioctl(fd,CDROMREADTOCHDR,&tochdr)==-1) {
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MP_ERR(stream, "read CDROM toc header: %s\n",strerror(errno));
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return NULL;
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}
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for (i=tochdr.cdth_trk0 ; i<=tochdr.cdth_trk1 + 1; i++){
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struct cdrom_tocentry tocentry;
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tocentry.cdte_track = i<=tochdr.cdth_trk1 ? i : CDROM_LEADOUT;
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tocentry.cdte_format = CDROM_MSF;
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if (ioctl(fd,CDROMREADTOCENTRY,&tocentry)==-1) {
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MP_ERR(stream, "read CDROM toc entry: %s\n",strerror(errno));
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return NULL;
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}
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if (i<=tochdr.cdth_trk1)
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MP_INFO(stream, "track %02d: adr=%d ctrl=%d format=%d %02d:%02d:%02d mode: %d\n",
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(int)tocentry.cdte_track,
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(int)tocentry.cdte_adr,
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(int)tocentry.cdte_ctrl,
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(int)tocentry.cdte_format,
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(int)tocentry.cdte_addr.msf.minute,
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(int)tocentry.cdte_addr.msf.second,
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(int)tocentry.cdte_addr.msf.frame,
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(int)tocentry.cdte_datamode
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);
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}
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vcd = malloc(sizeof(mp_vcd_priv_t));
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vcd->stream = stream;
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vcd->fd = fd;
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vcd->tochdr = tochdr;
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return vcd;
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}
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static int vcd_read(mp_vcd_priv_t* vcd,char *mem){
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#ifndef sun
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memcpy(vcd->buf,&vcd->entry.cdte_addr.msf,sizeof(vcd->entry.cdte_addr.msf));
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if(ioctl(vcd->fd,CDROMREADRAW,vcd->buf)==-1) return 0; // EOF?
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memcpy(mem,&vcd->buf[VCD_SECTOR_OFFS],VCD_SECTOR_DATA);
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#else
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{
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int offset;
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if (sun_vcd_read(vcd, &offset) <= 0) return 0;
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memcpy(mem,&vcd->buf[offset],VCD_SECTOR_DATA);
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}
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#endif
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vcd->entry.cdte_addr.msf.frame++;
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if (vcd->entry.cdte_addr.msf.frame==75){
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vcd->entry.cdte_addr.msf.frame=0;
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vcd->entry.cdte_addr.msf.second++;
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if (vcd->entry.cdte_addr.msf.second==60){
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vcd->entry.cdte_addr.msf.second=0;
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vcd->entry.cdte_addr.msf.minute++;
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}
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}
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return VCD_SECTOR_DATA;
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}
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#ifdef sun
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#include <sys/scsi/generic/commands.h>
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#include <sys/scsi/impl/uscsi.h>
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#define SUN_XAREAD 1 /*fails on atapi drives*/
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#define SUN_MODE2READ 2 /*fails on atapi drives*/
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#define SUN_SCSIREAD 3
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#define SUN_VCDREAD SUN_SCSIREAD
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static int sun_vcd_read(mp_vcd_priv_t* vcd, int *offset)
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{
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#if SUN_VCDREAD == SUN_XAREAD
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struct cdrom_cdxa cdxa;
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cdxa.cdxa_addr = vcd_get_msf(vcd);
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cdxa.cdxa_length = 1;
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cdxa.cdxa_data = vcd->buf;
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cdxa.cdxa_format = CDROM_XA_SECTOR_DATA;
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if(ioctl(vcd->fd,CDROMCDXA,&cdxa)==-1) {
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MP_ERR(vcd->stream, "CDROMCDXA: %s\n",strerror(errno));
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return 0;
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}
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*offset = 0;
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#elif SUN_VCDREAD == SUN_MODE2READ
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struct cdrom_read cdread;
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cdread.cdread_lba = 4*vcd_get_msf(vcd);
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cdread.cdread_bufaddr = vcd->buf;
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cdread.cdread_buflen = 2336;
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if(ioctl(vcd->fd,CDROMREADMODE2,&cdread)==-1) {
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MP_ERR(vcd->stream, "CDROMREADMODE2: %s\n",strerror(errno));
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return 0;
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}
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*offset = 8;
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#elif SUN_VCDREAD == SUN_SCSIREAD
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struct uscsi_cmd sc;
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union scsi_cdb cdb;
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int lba = vcd_get_msf(vcd);
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int blocks = 1;
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memset(&cdb, 0, sizeof(cdb));
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memset(&sc, 0, sizeof(sc));
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cdb.scc_cmd = 0xBE;
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cdb.cdb_opaque[1] = 5 << 2; // mode2 / form2
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AV_WB32(&cdb.cdb_opaque[2], lba);
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AV_WB24(&cdb.cdb_opaque[6], blocks);
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cdb.cdb_opaque[9] = 1 << 4; // user data only
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cdb.cdb_opaque[10] = 0; // subchannel
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sc.uscsi_cdb = (caddr_t)&cdb;
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sc.uscsi_cdblen = 12;
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sc.uscsi_bufaddr = vcd->buf;
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sc.uscsi_buflen = 2336;
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sc.uscsi_flags = USCSI_ISOLATE | USCSI_READ;
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sc.uscsi_timeout = 20;
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if (ioctl(vcd->fd, USCSICMD, &sc)) {
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MP_ERR(vcd->stream, "USCSICMD: READ CD: %s\n",strerror(errno));
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return -1;
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}
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if (sc.uscsi_status) {
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MP_ERR(vcd->stream, "scsi command failed with status %d\n", sc.uscsi_status);
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return -1;
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}
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*offset = 0;
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return 1;
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#else
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#error SUN_VCDREAD
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#endif
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}
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#endif /*sun*/
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#endif /* MPLAYER_VCD_READ_H */
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