mirror of
https://github.com/mpv-player/mpv
synced 2024-12-22 06:42:03 +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).
240 lines
5.9 KiB
C
240 lines
5.9 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_FBSD_H
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#define MPLAYER_VCD_READ_FBSD_H
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#define _XOPEN_SOURCE 500
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#include <sys/types.h>
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#include <inttypes.h>
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#include <unistd.h>
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#include <sys/cdio.h>
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#include <sys/ioctl.h>
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#include <libavutil/intreadwrite.h>
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#if defined(__NetBSD__) || defined(__OpenBSD__)
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#define VCD_NETBSD 1
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#endif
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#ifdef VCD_NETBSD
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#include <sys/scsiio.h>
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#define TOCADDR(te) ((te).data->addr)
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#define READ_TOC CDIOREADTOCENTRYS
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#else
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#include <sys/cdrio.h>
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#define TOCADDR(te) ((te).entry.addr)
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#define READ_TOC CDIOREADTOCENTRY
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#endif
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#include "common/msg.h"
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//=================== VideoCD ==========================
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#define CDROM_LEADOUT 0xAA
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typedef struct {
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uint8_t sync [12];
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uint8_t header [4];
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uint8_t subheader [8];
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uint8_t data [2324];
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uint8_t spare [4];
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} cdsector_t;
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#ifdef VCD_NETBSD
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typedef struct ioc_read_toc_entry vcd_tocentry;
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#else
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typedef struct ioc_read_toc_single_entry vcd_tocentry;
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#endif
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typedef struct mp_vcd_priv_st {
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int start;
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int fd;
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vcd_tocentry entry;
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#ifdef VCD_NETBSD
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struct cd_toc_entry entry_data;
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#else
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cdsector_t buf;
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#endif
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struct ioc_toc_header tochdr;
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} mp_vcd_priv_t;
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static inline void
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vcd_set_msf(mp_vcd_priv_t* vcd, unsigned int sect)
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{
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#ifdef VCD_NETBSD
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vcd->entry.data = &vcd->entry_data;
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#endif
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sect += 150;
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TOCADDR(vcd->entry).msf.frame = sect % 75;
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sect = sect / 75;
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TOCADDR(vcd->entry).msf.second = sect % 60;
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sect = sect / 60;
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TOCADDR(vcd->entry).msf.minute = sect;
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}
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static inline void
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vcd_inc_msf(mp_vcd_priv_t* vcd)
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{
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#ifdef VCD_NETBSD
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vcd->entry.data = &vcd->entry_data;
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#endif
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TOCADDR(vcd->entry).msf.frame++;
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if (TOCADDR(vcd->entry).msf.frame==75){
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TOCADDR(vcd->entry).msf.frame=0;
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TOCADDR(vcd->entry).msf.second++;
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if (TOCADDR(vcd->entry).msf.second==60){
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TOCADDR(vcd->entry).msf.second=0;
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TOCADDR(vcd->entry).msf.minute++;
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}
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}
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}
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static inline unsigned int
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vcd_get_msf(mp_vcd_priv_t* vcd)
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{
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#ifdef VCD_NETBSD
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vcd->entry.data = &vcd->entry_data;
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#endif
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return TOCADDR(vcd->entry).msf.frame +
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(TOCADDR(vcd->entry).msf.second +
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TOCADDR(vcd->entry).msf.minute * 60) * 75 - 150;
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}
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/**
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* \brief read a TOC entry
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* \param fd device to read from
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* \param dst buffer to read data into
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* \param nr track number to read info for
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* \return 1 on success, 0 on failure
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*/
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static int
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read_toc_entry(mp_vcd_priv_t *vcd, int nr)
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{
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vcd->entry.address_format = CD_MSF_FORMAT;
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#ifdef VCD_NETBSD
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vcd->entry.data_len = sizeof(struct cd_toc_entry);
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vcd->entry.data = &vcd->entry_data;
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vcd->entry.starting_track = nr;
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#else
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vcd->entry.track = nr;
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#endif
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if (ioctl(vcd->fd, READ_TOC, &vcd->entry) == -1) {
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return 0;
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}
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return 1;
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}
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static int
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vcd_seek_to_track(mp_vcd_priv_t* vcd, int track)
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{
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if (!read_toc_entry(vcd, track))
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return -1;
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return VCD_SECTOR_DATA * vcd_get_msf(vcd);
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}
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static int
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vcd_get_track_end(mp_vcd_priv_t* vcd, int track)
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{
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if (!read_toc_entry(vcd,
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track < vcd->tochdr.ending_track ? track + 1 : CDROM_LEADOUT))
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return -1;
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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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{
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struct ioc_toc_header tochdr;
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mp_vcd_priv_t* vcd;
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int i, last_startsect;
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if (ioctl(fd, CDIOREADTOCHEADER, &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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vcd = malloc(sizeof(mp_vcd_priv_t));
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vcd->fd = fd;
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vcd->tochdr = tochdr;
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for (i = tochdr.starting_track; i <= tochdr.ending_track + 1; i++) {
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if (!read_toc_entry(vcd,
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i <= tochdr.ending_track ? i : CDROM_LEADOUT)) {
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free(vcd);
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return NULL;
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}
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if (i <= tochdr.ending_track)
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MP_INFO(stream, "track %02d: adr=%d ctrl=%d format=%d %02d:%02d:%02d\n",
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#ifdef VCD_NETBSD
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(int)vcd->entry.starting_track,
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(int)vcd->entry.data->addr_type,
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(int)vcd->entry.data->control,
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#else
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(int)vcd->entry.track,
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(int)vcd->entry.entry.addr_type,
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(int)vcd->entry.entry.control,
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#endif
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(int)vcd->entry.address_format,
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(int)TOCADDR(vcd->entry).msf.minute,
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(int)TOCADDR(vcd->entry).msf.second,
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(int)TOCADDR(vcd->entry).msf.frame
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);
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}
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return vcd;
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}
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static int
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vcd_read(mp_vcd_priv_t* vcd, char *mem)
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{
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#ifdef VCD_NETBSD
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struct scsireq sc;
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int lba = vcd_get_msf(vcd);
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int blocks;
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int rc;
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blocks = 1;
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memset(&sc, 0, sizeof(sc));
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sc.cmd[0] = 0xBE;
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sc.cmd[1] = 5 << 2; // mode2/form2
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AV_WB32(&sc.cmd[2], lba);
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AV_WB24(&sc.cmd[6], blocks);
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sc.cmd[9] = 1 << 4; // user data only
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sc.cmd[10] = 0; // no subchannel
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sc.cmdlen = 12;
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sc.databuf = (caddr_t) mem;
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sc.datalen = VCD_SECTOR_DATA;
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sc.senselen = sizeof(sc.sense);
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sc.flags = SCCMD_READ;
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sc.timeout = 10000;
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rc = ioctl(vcd->fd, SCIOCCOMMAND, &sc);
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if (rc == -1) {
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return -1;
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}
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if (sc.retsts || sc.error) {
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return -1;
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}
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#else
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if (pread(vcd->fd,&vcd->buf,VCD_SECTOR_SIZE,vcd_get_msf(vcd)*VCD_SECTOR_SIZE)
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!= VCD_SECTOR_SIZE) return 0; // EOF?
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memcpy(mem,vcd->buf.data,VCD_SECTOR_DATA);
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#endif
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vcd_inc_msf(vcd);
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return VCD_SECTOR_DATA;
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}
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#endif /* MPLAYER_VCD_READ_FBSD_H */
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