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mpv/dvdread/nav_read.c
nicodvb af4c7a3fd8 reimplemented nav_read_PCI() and nav_read_DSI() using getbits() rather than relying on bitfields layout in memory 
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@24108 b3059339-0415-0410-9bf9-f77b7e298cf2
2007-08-20 21:27:44 +00:00

332 lines
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C
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/* -*- c-basic-offset: 2; indent-tabs-mode: nil -*- */
/*
* Copyright (C) 2000, 2001, 2002, 2003 Håkan Hjort <d95hjort@dtek.chalmers.se>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#if defined(HAVE_INTTYPES_H)
#include <inttypes.h>
#elif defined(HAVE_STDINT_H)
#include <stdint.h>
#endif
#include "bswap.h"
#include "nav_types.h"
#include "nav_read.h"
#include "dvdread_internal.h"
typedef struct {
uint8_t *start;
uint32_t byte_position;
uint32_t bit_position;
uint8_t byte;
} getbits_state_t;
static int getbits_init(getbits_state_t *state, uint8_t *start) {
if ((state == NULL) || (start == NULL)) return 0;
state->start = start;
state->bit_position = 0;
state->byte_position = 0;
state->byte = start[0];
return 1;
}
/* Non-optimized getbits. */
/* This can easily be optimized for particular platforms. */
static uint32_t getbits(getbits_state_t *state, uint32_t number_of_bits) {
uint32_t result=0;
uint8_t byte=0;
if (number_of_bits > 32) {
printf("Number of bits > 32 in getbits\n");
abort();
}
if ((state->bit_position) > 0) { /* Last getbits left us in the middle of a byte. */
if (number_of_bits > (8-state->bit_position)) { /* this getbits will span 2 or more bytes. */
byte = state->byte;
byte = byte >> (state->bit_position);
result = byte;
number_of_bits -= (8-state->bit_position);
state->bit_position = 0;
state->byte_position++;
state->byte = state->start[state->byte_position];
} else {
byte=state->byte;
state->byte = state->byte << number_of_bits;
byte = byte >> (8 - number_of_bits);
result = byte;
state->bit_position += number_of_bits; /* Here it is impossible for bit_position > 8 */
if (state->bit_position == 8) {
state->bit_position = 0;
state->byte_position++;
state->byte = state->start[state->byte_position];
}
number_of_bits = 0;
}
}
if ((state->bit_position) == 0) {
while (number_of_bits > 7) {
result = (result << 8) + state->byte;
state->byte_position++;
state->byte = state->start[state->byte_position];
number_of_bits -= 8;
}
if (number_of_bits > 0) { /* number_of_bits < 8 */
byte = state->byte;
state->byte = state->byte << number_of_bits;
state->bit_position += number_of_bits; /* Here it is impossible for bit_position > 7 */
byte = byte >> (8 - number_of_bits);
result = (result << number_of_bits) + byte;
number_of_bits = 0;
}
}
return result;
}
void navRead_PCI(pci_t *pci, unsigned char *buffer) {
int i, j;
getbits_state_t state;
if (!getbits_init(&state, buffer)) abort(); /* Passed NULL pointers */
/* pci pci_gi */
pci->pci_gi.nv_pck_lbn = getbits(&state, 32 );
pci->pci_gi.vobu_cat = getbits(&state, 16 );
pci->pci_gi.zero1 = getbits(&state, 16 );
pci->pci_gi.vobu_uop_ctl.zero = getbits(&state, 7 );
pci->pci_gi.vobu_uop_ctl.video_pres_mode_change = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.karaoke_audio_pres_mode_change = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.angle_change = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.subpic_stream_change = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.audio_stream_change = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.pause_on = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.still_off = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.button_select_or_activate = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.resume = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.chapter_menu_call = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.angle_menu_call = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.audio_menu_call = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.subpic_menu_call = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.root_menu_call = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.title_menu_call = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.backward_scan = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.forward_scan = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.next_pg_search = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.prev_or_top_pg_search = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.time_or_chapter_search = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.go_up = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.stop = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.title_play = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.chapter_search_or_play = getbits(&state, 1 );
pci->pci_gi.vobu_uop_ctl.title_or_time_play = getbits(&state, 1 );
pci->pci_gi.vobu_s_ptm = getbits(&state, 32 );
pci->pci_gi.vobu_e_ptm = getbits(&state, 32 );
pci->pci_gi.vobu_se_e_ptm = getbits(&state, 32 );
pci->pci_gi.e_eltm.hour = getbits(&state, 8 );
pci->pci_gi.e_eltm.minute = getbits(&state, 8 );
pci->pci_gi.e_eltm.second = getbits(&state, 8 );
pci->pci_gi.e_eltm.frame_u = getbits(&state, 8 );
for(i = 0; i < 32; i++)
pci->pci_gi.vobu_isrc[i] = getbits(&state, 8 );
/* pci nsml_agli */
for(i = 0; i < 9; i++)
pci->nsml_agli.nsml_agl_dsta[i] = getbits(&state, 32 );
/* pci hli hli_gi */
pci->hli.hl_gi.hli_ss = getbits(&state, 16 );
pci->hli.hl_gi.hli_s_ptm = getbits(&state, 32 );
pci->hli.hl_gi.hli_e_ptm = getbits(&state, 32 );
pci->hli.hl_gi.btn_se_e_ptm = getbits(&state, 32 );
pci->hli.hl_gi.zero1 = getbits(&state, 2 );
pci->hli.hl_gi.btngr_ns = getbits(&state, 2 );
pci->hli.hl_gi.zero2 = getbits(&state, 1 );
pci->hli.hl_gi.btngr1_dsp_ty = getbits(&state, 3 );
pci->hli.hl_gi.zero3 = getbits(&state, 1 );
pci->hli.hl_gi.btngr2_dsp_ty = getbits(&state, 3 );
pci->hli.hl_gi.zero4 = getbits(&state, 1 );
pci->hli.hl_gi.btngr3_dsp_ty = getbits(&state, 3 );
pci->hli.hl_gi.btn_ofn = getbits(&state, 8 );
pci->hli.hl_gi.btn_ns = getbits(&state, 8 );
pci->hli.hl_gi.nsl_btn_ns = getbits(&state, 8 );
pci->hli.hl_gi.zero5 = getbits(&state, 8 );
pci->hli.hl_gi.fosl_btnn = getbits(&state, 8 );
pci->hli.hl_gi.foac_btnn = getbits(&state, 8 );
/* pci hli btn_colit */
for(i = 0; i < 3; i++)
for(j = 0; j < 2; j++)
pci->hli.btn_colit.btn_coli[i][j] = getbits(&state, 32 );
/* pci hli btni */
for(i = 0; i < 36; i++) {
pci->hli.btnit[i].btn_coln = getbits(&state, 2 );
pci->hli.btnit[i].x_start = getbits(&state, 10 );
pci->hli.btnit[i].zero1 = getbits(&state, 2 );
pci->hli.btnit[i].x_end = getbits(&state, 10 );
pci->hli.btnit[i].auto_action_mode = getbits(&state, 2 );
pci->hli.btnit[i].y_start = getbits(&state, 10 );
pci->hli.btnit[i].zero2 = getbits(&state, 2 );
pci->hli.btnit[i].y_end = getbits(&state, 10 );
pci->hli.btnit[i].zero3 = getbits(&state, 2 );
pci->hli.btnit[i].up = getbits(&state, 6 );
pci->hli.btnit[i].zero4 = getbits(&state, 2 );
pci->hli.btnit[i].down = getbits(&state, 6 );
pci->hli.btnit[i].zero5 = getbits(&state, 2 );
pci->hli.btnit[i].left = getbits(&state, 6 );
pci->hli.btnit[i].zero6 = getbits(&state, 2 );
pci->hli.btnit[i].right = getbits(&state, 6 );
/* pci vm_cmd */
for(j = 0; j < 8; j++)
pci->hli.btnit[i].cmd.bytes[j] = getbits(&state, 8 );
}
#ifndef NDEBUG
/* Asserts */
/* pci pci gi */
CHECK_VALUE(pci->pci_gi.zero1 == 0);
/* pci hli hli_gi */
CHECK_VALUE(pci->hli.hl_gi.zero1 == 0);
CHECK_VALUE(pci->hli.hl_gi.zero2 == 0);
CHECK_VALUE(pci->hli.hl_gi.zero3 == 0);
CHECK_VALUE(pci->hli.hl_gi.zero4 == 0);
CHECK_VALUE(pci->hli.hl_gi.zero5 == 0);
/* Are there buttons defined here? */
if((pci->hli.hl_gi.hli_ss & 0x03) != 0) {
CHECK_VALUE(pci->hli.hl_gi.btn_ns != 0);
CHECK_VALUE(pci->hli.hl_gi.btngr_ns != 0);
} else {
CHECK_VALUE((pci->hli.hl_gi.btn_ns != 0 && pci->hli.hl_gi.btngr_ns != 0)
|| (pci->hli.hl_gi.btn_ns == 0 && pci->hli.hl_gi.btngr_ns == 0));
}
/* pci hli btnit */
for(i = 0; i < pci->hli.hl_gi.btngr_ns; i++) {
for(j = 0; j < (36 / pci->hli.hl_gi.btngr_ns); j++) {
int n = (36 / pci->hli.hl_gi.btngr_ns) * i + j;
CHECK_VALUE(pci->hli.btnit[n].zero1 == 0);
CHECK_VALUE(pci->hli.btnit[n].zero2 == 0);
CHECK_VALUE(pci->hli.btnit[n].zero3 == 0);
CHECK_VALUE(pci->hli.btnit[n].zero4 == 0);
CHECK_VALUE(pci->hli.btnit[n].zero5 == 0);
CHECK_VALUE(pci->hli.btnit[n].zero6 == 0);
if (j < pci->hli.hl_gi.btn_ns) {
CHECK_VALUE(pci->hli.btnit[n].x_start <= pci->hli.btnit[n].x_end);
CHECK_VALUE(pci->hli.btnit[n].y_start <= pci->hli.btnit[n].y_end);
CHECK_VALUE(pci->hli.btnit[n].up <= pci->hli.hl_gi.btn_ns);
CHECK_VALUE(pci->hli.btnit[n].down <= pci->hli.hl_gi.btn_ns);
CHECK_VALUE(pci->hli.btnit[n].left <= pci->hli.hl_gi.btn_ns);
CHECK_VALUE(pci->hli.btnit[n].right <= pci->hli.hl_gi.btn_ns);
//vmcmd_verify(pci->hli.btnit[n].cmd);
} else {
int k;
CHECK_VALUE(pci->hli.btnit[n].btn_coln == 0);
CHECK_VALUE(pci->hli.btnit[n].auto_action_mode == 0);
CHECK_VALUE(pci->hli.btnit[n].x_start == 0);
CHECK_VALUE(pci->hli.btnit[n].y_start == 0);
CHECK_VALUE(pci->hli.btnit[n].x_end == 0);
CHECK_VALUE(pci->hli.btnit[n].y_end == 0);
CHECK_VALUE(pci->hli.btnit[n].up == 0);
CHECK_VALUE(pci->hli.btnit[n].down == 0);
CHECK_VALUE(pci->hli.btnit[n].left == 0);
CHECK_VALUE(pci->hli.btnit[n].right == 0);
for (k = 0; k < 8; k++)
CHECK_VALUE(pci->hli.btnit[n].cmd.bytes[k] == 0); //CHECK_ZERO?
}
}
}
#endif /* !NDEBUG */
}
void navRead_DSI(dsi_t *dsi, unsigned char *buffer) {
int i;
getbits_state_t state;
if (!getbits_init(&state, buffer)) abort(); /* Passed NULL pointers */
/* dsi dsi gi */
dsi->dsi_gi.nv_pck_scr = getbits(&state, 32 );
dsi->dsi_gi.nv_pck_lbn = getbits(&state, 32 );
dsi->dsi_gi.vobu_ea = getbits(&state, 32 );
dsi->dsi_gi.vobu_1stref_ea = getbits(&state, 32 );
dsi->dsi_gi.vobu_2ndref_ea = getbits(&state, 32 );
dsi->dsi_gi.vobu_3rdref_ea = getbits(&state, 32 );
dsi->dsi_gi.vobu_vob_idn = getbits(&state, 16 );
dsi->dsi_gi.zero1 = getbits(&state, 8 );
dsi->dsi_gi.vobu_c_idn = getbits(&state, 8 );
dsi->dsi_gi.c_eltm.hour = getbits(&state, 8 );
dsi->dsi_gi.c_eltm.minute = getbits(&state, 8 );
dsi->dsi_gi.c_eltm.second = getbits(&state, 8 );
dsi->dsi_gi.c_eltm.frame_u = getbits(&state, 8 );
/* dsi sml pbi */
dsi->sml_pbi.category = getbits(&state, 16 );
dsi->sml_pbi.ilvu_ea = getbits(&state, 32 );
dsi->sml_pbi.ilvu_sa = getbits(&state, 32 );
dsi->sml_pbi.size = getbits(&state, 16 );
dsi->sml_pbi.vob_v_s_s_ptm = getbits(&state, 32 );
dsi->sml_pbi.vob_v_e_e_ptm = getbits(&state, 32 );
for(i = 0; i < 8; i++) {
dsi->sml_pbi.vob_a[i].stp_ptm1 = getbits(&state, 32 );
dsi->sml_pbi.vob_a[i].stp_ptm2 = getbits(&state, 32 );
dsi->sml_pbi.vob_a[i].gap_len1 = getbits(&state, 32 );
dsi->sml_pbi.vob_a[i].gap_len2 = getbits(&state, 32 );
}
/* dsi sml agli */
for(i = 0; i < 9; i++) {
dsi->sml_agli.data[ i ].address = getbits(&state, 32 );
dsi->sml_agli.data[ i ].size = getbits(&state, 16 );
}
/* dsi vobu sri */
dsi->vobu_sri.next_video = getbits(&state, 32 );
for(i = 0; i < 19; i++)
dsi->vobu_sri.fwda[i] = getbits(&state, 32 );
dsi->vobu_sri.next_vobu = getbits(&state, 32 );
dsi->vobu_sri.prev_vobu = getbits(&state, 32 );
for(i = 0; i < 19; i++)
dsi->vobu_sri.bwda[i] = getbits(&state, 32 );
dsi->vobu_sri.prev_video = getbits(&state, 32 );
/* dsi synci */
for(i = 0; i < 8; i++)
dsi->synci.a_synca[i] = getbits(&state, 16 );
for(i = 0; i < 32; i++)
dsi->synci.sp_synca[i] = getbits(&state, 32 );
/* Asserts */
/* dsi dsi gi */
CHECK_VALUE(dsi->dsi_gi.zero1 == 0);
}
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