diff options
Diffstat (limited to 'libdvdread/nav_read.c')
| -rw-r--r-- | libdvdread/nav_read.c | 331 |
1 files changed, 331 insertions, 0 deletions
diff --git a/libdvdread/nav_read.c b/libdvdread/nav_read.c new file mode 100644 index 0000000000..9ba685bdca --- /dev/null +++ b/libdvdread/nav_read.c @@ -0,0 +1,331 @@ +/* -*- 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); +} + |