mirror of
https://github.com/mpv-player/mpv
synced 2025-02-19 14:26:57 +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).
133 lines
4.0 KiB
C
133 lines
4.0 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_WIN32_H
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#define MPLAYER_VCD_READ_WIN32_H
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ntddcdrm.h>
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#include "common/msg.h"
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typedef struct mp_vcd_priv_st mp_vcd_priv_t;
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/*
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Unlike Unices, upon reading TOC, Windows will retrieve information for
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all tracks, so we don't need to call DeviceIoControl() in functions
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like vcd_seek_to_track() and vcd_get_track_end() for each track. Instead
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we cache the information in mp_vcd_priv_st.
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*/
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struct mp_vcd_priv_st {
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int start;
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HANDLE hd;
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CDROM_TOC toc;
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unsigned sect;
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char buf[VCD_SECTOR_SIZE];
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};
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static inline void vcd_set_msf(mp_vcd_priv_t* vcd, unsigned sect)
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{
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vcd->sect = sect;
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}
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static inline unsigned vcd_get_msf(mp_vcd_priv_t* vcd, int track){
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int index = track - vcd->toc.FirstTrack;
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/* -150 to compensate the 2-second pregap */
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return vcd->toc.TrackData[index].Address[3] +
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(vcd->toc.TrackData[index].Address[2] +
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vcd->toc.TrackData[index].Address[1] * 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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unsigned sect;
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if (track < vcd->toc.FirstTrack || track > vcd->toc.LastTrack)
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return -1;
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sect = vcd_get_msf(vcd, track);
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vcd_set_msf(vcd, sect);
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return VCD_SECTOR_DATA * (sect + 2);
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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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{
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if (track < vcd->toc.FirstTrack || track > vcd->toc.LastTrack)
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return -1;
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return VCD_SECTOR_DATA * (vcd_get_msf(vcd, track + 1));
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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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DWORD dwBytesReturned;
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HANDLE hd;
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int i;
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mp_vcd_priv_t* vcd = malloc(sizeof(mp_vcd_priv_t));
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if (!vcd)
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return NULL;
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hd = (HANDLE)_get_osfhandle(fd);
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if (!DeviceIoControl(hd, IOCTL_CDROM_READ_TOC, NULL, 0, &vcd->toc,
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sizeof(CDROM_TOC), &dwBytesReturned, NULL)) {
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MP_ERR(stream, "read CDROM toc header: %lu\n",
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GetLastError());
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free(vcd);
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return NULL;
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}
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for (i = vcd->toc.FirstTrack; i <= vcd->toc.LastTrack + 1; i++) {
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int index = i - vcd->toc.FirstTrack;
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if (i <= vcd->toc.LastTrack) {
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MP_INFO(stream, "track %02d: adr=%d ctrl=%d"
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" %02d:%02d:%02d\n",
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vcd->toc.TrackData[index].TrackNumber,
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vcd->toc.TrackData[index].Adr,
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vcd->toc.TrackData[index].Control,
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vcd->toc.TrackData[index].Address[1],
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vcd->toc.TrackData[index].Address[2],
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vcd->toc.TrackData[index].Address[3]);
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}
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}
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vcd->hd = hd;
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return vcd;
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}
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#define vcd_close(priv) (CloseHandle(((mp_vcd_priv_t*)priv)->hd))
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static int vcd_read(mp_vcd_priv_t* vcd, char *mem)
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{
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DWORD dwBytesReturned;
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RAW_READ_INFO cdrom_raw;
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/* 2048 isn't a typo: it's the Windows way. */
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cdrom_raw.DiskOffset.QuadPart = (long long)(2048 * vcd->sect);
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cdrom_raw.SectorCount = 1;
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cdrom_raw.TrackMode = XAForm2;
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if (!DeviceIoControl(vcd->hd, IOCTL_CDROM_RAW_READ, &cdrom_raw,
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sizeof(RAW_READ_INFO), vcd->buf, sizeof(vcd->buf),
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&dwBytesReturned, NULL))
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return 0;
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vcd->sect++;
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memcpy(mem, &vcd->buf[VCD_SECTOR_OFFS], VCD_SECTOR_DATA);
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return VCD_SECTOR_DATA;
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}
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#endif /* MPLAYER_VCD_READ_WIN32_H */
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