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dvdnav.c
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dvdnav.c
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/*
* Copyright (C) 2000 Rich Wareham <richwareham@users.sourceforge.net>
*
* This file is part of libdvdnav, a DVD navigation library.
*
* libdvdnav 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.
*
* libdvdnav 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 libdvdnav; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/*
#define LOG_DEBUG
*/
#include <inttypes.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <limits.h>
#include <string.h>
#include <sys/time.h>
#include "dvdnav/dvdnav.h"
#include <dvdread/dvd_reader.h>
#include <dvdread/nav_types.h>
#include <dvdread/ifo_types.h> /* For vm_cmd_t */
#include "vm/decoder.h"
#include "vm/vm.h"
#include "dvdnav_internal.h"
#include "read_cache.h"
#include <dvdread/nav_read.h>
static dvdnav_status_t dvdnav_clear(dvdnav_t * this) {
/* clear everything except file, vm, mutex, readahead */
pthread_mutex_lock(&this->vm_lock);
if (this->file) DVDCloseFile(this->file);
this->file = NULL;
memset(&this->position_current,0,sizeof(this->position_current));
memset(&this->pci,0,sizeof(this->pci));
memset(&this->dsi,0,sizeof(this->dsi));
this->last_cmd_nav_lbn = SRI_END_OF_CELL;
/* Set initial values of flags */
this->skip_still = 0;
this->sync_wait = 0;
this->sync_wait_skip = 0;
this->spu_clut_changed = 0;
this->started = 0;
this->cur_cell_time = 0;
dvdnav_read_cache_clear(this->cache);
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
dvdnav_status_t dvdnav_dup(dvdnav_t **dest, dvdnav_t *src) {
dvdnav_t *this;
(*dest) = NULL;
this = (dvdnav_t*)malloc(sizeof(dvdnav_t));
if (!this)
return DVDNAV_STATUS_ERR;
memcpy(this, src, sizeof(dvdnav_t));
this->file = NULL;
this->vm = NULL;
this->path = NULL;
this->cache = NULL;
pthread_mutex_init(&this->vm_lock, NULL);
this->vm = vm_new_copy(src->vm);
if (!this->vm)
goto fail;
this->path = strdup(src->path);
if (!this->path)
goto fail;
/* Start the read-ahead cache. */
this->cache = dvdnav_read_cache_new(this);
if (!this->cache)
goto fail;
(*dest) = this;
return DVDNAV_STATUS_OK;
fail:
printerr("Error initialising the DVD VM.");
pthread_mutex_destroy(&this->vm_lock);
vm_free_vm(this->vm);
free(this->path);
free(this);
return DVDNAV_STATUS_ERR;
}
dvdnav_status_t dvdnav_free_dup(dvdnav_t *this) {
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: free_dup:called\n");
#endif
if (this->file) {
pthread_mutex_lock(&this->vm_lock);
DVDCloseFile(this->file);
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: close:file closing\n");
#endif
this->file = NULL;
pthread_mutex_unlock(&this->vm_lock);
}
/* Free the VM */
if(this->vm)
vm_free_copy(this->vm);
pthread_mutex_destroy(&this->vm_lock);
free(this->path);
/* We leave the final freeing of the entire structure to the cache,
* because we don't know, if there are still buffers out in the wild,
* that must return first. */
if(this->cache)
dvdnav_read_cache_free(this->cache);
else
free(this);
return DVDNAV_STATUS_OK;
}
static dvdnav_status_t dvdnav_open_common(dvdnav_t** dest, const char *path,
void *stream,
dvdnav_stream_cb *stream_cb) {
dvdnav_t *this;
struct timeval time;
/* Create a new structure */
fprintf(MSG_OUT, "libdvdnav: Using dvdnav version %s\n", VERSION);
(*dest) = NULL;
this = (dvdnav_t*)calloc(1, sizeof(dvdnav_t));
if(!this)
return DVDNAV_STATUS_ERR;
pthread_mutex_init(&this->vm_lock, NULL);
/* Initialise the error string */
printerr("");
/* Initialise the VM */
this->vm = vm_new_vm();
if(!this->vm) {
printerr("Error initialising the DVD VM.");
goto fail;
}
if(!vm_reset(this->vm, path, stream, stream_cb)) {
printerr("Error starting the VM / opening the DVD device.");
goto fail;
}
/* Set the path. */
if(path != NULL)
{
this->path = strdup(path);
if(!this->path)
goto fail;
}
/* Pre-open and close a file so that the CSS-keys are cached. */
this->file = DVDOpenFile(vm_get_dvd_reader(this->vm), 0, DVD_READ_MENU_VOBS);
/* Start the read-ahead cache. */
this->cache = dvdnav_read_cache_new(this);
if(!this->cache)
goto fail;
/* Seed the random numbers. So that the DVD VM Command rand()
* gives a different start value each time a DVD is played. */
gettimeofday(&time, NULL);
srand(time.tv_usec);
dvdnav_clear(this);
(*dest) = this;
return DVDNAV_STATUS_OK;
fail:
pthread_mutex_destroy(&this->vm_lock);
vm_free_vm(this->vm);
free(this->path);
free(this);
return DVDNAV_STATUS_ERR;
}
dvdnav_status_t dvdnav_open(dvdnav_t** dest, const char *path) {
return dvdnav_open_common(dest, path, NULL, NULL);
}
dvdnav_status_t dvdnav_open_stream(dvdnav_t** dest,
void *stream, dvdnav_stream_cb *stream_cb) {
return dvdnav_open_common(dest, NULL, stream, stream_cb);
}
dvdnav_status_t dvdnav_close(dvdnav_t *this) {
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: close:called\n");
#endif
if (this->file) {
pthread_mutex_lock(&this->vm_lock);
DVDCloseFile(this->file);
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: close:file closing\n");
#endif
this->file = NULL;
pthread_mutex_unlock(&this->vm_lock);
}
/* Free the VM */
if(this->vm)
vm_free_vm(this->vm);
pthread_mutex_destroy(&this->vm_lock);
free(this->path);
/* We leave the final freeing of the entire structure to the cache,
* because we don't know, if there are still buffers out in the wild,
* that must return first. */
if(this->cache)
dvdnav_read_cache_free(this->cache);
else
free(this);
return DVDNAV_STATUS_OK;
}
dvdnav_status_t dvdnav_reset(dvdnav_t *this) {
dvdnav_status_t result;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: reset:called\n");
#endif
pthread_mutex_lock(&this->vm_lock);
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: reseting vm\n");
#endif
if(!vm_reset(this->vm, NULL, NULL, NULL)) {
printerr("Error restarting the VM.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: clearing dvdnav\n");
#endif
pthread_mutex_unlock(&this->vm_lock);
result = dvdnav_clear(this);
return result;
}
dvdnav_status_t dvdnav_path(dvdnav_t *this, const char** path) {
(*path) = this->path;
return DVDNAV_STATUS_OK;
}
const char* dvdnav_err_to_string(dvdnav_t *this) {
if(!this)
return "Hey! You gave me a NULL pointer you naughty person!";
return this->err_str;
}
/* converts a dvd_time_t to PTS ticks */
int64_t dvdnav_convert_time(dvd_time_t *time) {
int64_t result;
int64_t frames;
result = ((int64_t)(time->hour >> 4 )) * 10 * 60 * 60 * 90000;
result += ((int64_t)(time->hour & 0x0f)) * 60 * 60 * 90000;
result += ((int64_t)(time->minute >> 4 )) * 10 * 60 * 90000;
result += ((int64_t)(time->minute & 0x0f)) * 60 * 90000;
result += ((int64_t)(time->second >> 4 )) * 10 * 90000;
result += ((int64_t)(time->second & 0x0f)) * 90000;
frames = ((time->frame_u & 0x30) >> 4) * 10;
frames += ((time->frame_u & 0x0f) ) ;
if (time->frame_u & 0x80)
result += frames * 3000;
else
result += frames * 3600;
return result;
}
/*
* Returns 1 if block contains NAV packet, 0 otherwise.
* Processes said NAV packet if present.
*
* Most of the code in here is copied from xine's MPEG demuxer
* so any bugs which are found in that should be corrected here also.
*/
static int32_t dvdnav_decode_packet(uint8_t *p, dsi_t *nav_dsi, pci_t *nav_pci) {
int32_t bMpeg1 = 0;
uint32_t nHeaderLen;
uint32_t nPacketLen;
uint32_t nStreamID;
if (p[3] == 0xBA) { /* program stream pack header */
int32_t nStuffingBytes;
bMpeg1 = (p[4] & 0x40) == 0;
if (bMpeg1) {
p += 12;
} else { /* mpeg2 */
nStuffingBytes = p[0xD] & 0x07;
p += 14 + nStuffingBytes;
}
}
if (p[3] == 0xbb) { /* program stream system header */
nHeaderLen = (p[4] << 8) | p[5];
p += 6 + nHeaderLen;
}
/* we should now have a PES packet here */
if (p[0] || p[1] || (p[2] != 1)) {
fprintf(MSG_OUT, "libdvdnav: demux error! %02x %02x %02x (should be 0x000001) \n",p[0],p[1],p[2]);
return 0;
}
nPacketLen = p[4] << 8 | p[5];
nStreamID = p[3];
nHeaderLen = 6;
p += nHeaderLen;
if (nStreamID == 0xbf) { /* Private stream 2 */
#if 0
int32_t i;
fprintf(MSG_OUT, "libdvdnav: nav packet=%u\n",p-p_start-6);
for(i=0;i<80;i++)
fprintf(MSG_OUT, "%02x ",p[i-6]);
fprintf(MSG_OUT, "\n");
#endif
if(p[0] == 0x00) {
navRead_PCI(nav_pci, p+1);
}
p += nPacketLen;
/* We should now have a DSI packet. */
if(p[6] == 0x01) {
nPacketLen = p[4] << 8 | p[5];
p += 6;
navRead_DSI(nav_dsi, p+1);
}
return 1;
}
return 0;
}
/* DSI is used for most angle stuff.
* PCI is used for only non-seemless angle stuff
*/
static int32_t dvdnav_get_vobu(dvdnav_t *this, dsi_t *nav_dsi, pci_t *nav_pci, dvdnav_vobu_t *vobu) {
uint32_t next;
int32_t angle, num_angle;
vobu->vobu_start = nav_dsi->dsi_gi.nv_pck_lbn; /* Absolute offset from start of disk */
vobu->vobu_length = nav_dsi->dsi_gi.vobu_ea; /* Relative offset from vobu_start */
/*
* If we're not at the end of this cell, we can determine the next
* VOBU to display using the VOBU_SRI information section of the
* DSI. Using this value correctly follows the current angle,
* avoiding the doubled scenes in The Matrix, and makes our life
* really happy.
*
* vobu_next is an offset value, 0x3fffffff = SRI_END_OF_CELL
* DVDs are about 6 Gigs, which is only up to 0x300000 blocks
* Should really assert if bit 31 != 1
*/
#if 0
/* Old code -- may still be useful one day */
if(nav_dsi->vobu_sri.next_vobu != SRI_END_OF_CELL ) {
vobu->vobu_next = ( nav_dsi->vobu_sri.next_vobu & 0x3fffffff );
} else {
vobu->vobu_next = vobu->vobu_length;
}
#else
/* Relative offset from vobu_start */
vobu->vobu_next = ( nav_dsi->vobu_sri.next_vobu & 0x3fffffff );
#endif
vm_get_angle_info(this->vm, &angle, &num_angle);
/* FIMXE: The angle reset doesn't work for some reason for the moment */
#if 0
if((num_angle < angle) && (angle != 1)) {
fprintf(MSG_OUT, "libdvdnav: angle ends!\n");
/* This is to switch back to angle one when we
* finish with angles. */
dvdnav_angle_change(this, 1);
}
#endif
/* only use ILVU information if we are at the last vobunit in ILVU */
/* otherwise we will miss nav packets from vobunits inbetween */
if(num_angle != 0 && (nav_dsi->sml_pbi.category & DSI_ILVU_MASK) == (DSI_ILVU_BLOCK | DSI_ILVU_LAST)) {
if((next = nav_pci->nsml_agli.nsml_agl_dsta[angle-1]) != 0) {
if((next & 0x3fffffff) != 0) {
if(next & 0x80000000)
vobu->vobu_next = - (int32_t)(next & 0x3fffffff);
else
vobu->vobu_next = + (int32_t)(next & 0x3fffffff);
}
} else if((next = nav_dsi->sml_agli.data[angle-1].address) != 0) {
vobu->vobu_length = nav_dsi->sml_pbi.ilvu_ea;
if((next & 0x80000000) && (next != 0x7fffffff))
vobu->vobu_next = - (int32_t)(next & 0x3fffffff);
else
vobu->vobu_next = + (int32_t)(next & 0x3fffffff);
}
}
return 1;
}
/*
* These are the main get_next_block function which actually get the media stream video and audio etc.
*
* There are two versions: The second one is using the zero-copy read ahead cache and therefore
* hands out pointers targetting directly into the cache.
* The first one uses a memcopy to fill this cache block into the application provided memory.
* The benefit of this first one is that no special memory management is needed. The application is
* the only one responsible of allocating and freeing the memory associated with the pointer.
* The drawback is the additional memcopy.
*/
dvdnav_status_t dvdnav_get_next_block(dvdnav_t *this, uint8_t *buf,
int32_t *event, int32_t *len) {
unsigned char *block;
dvdnav_status_t status;
block = buf;
status = dvdnav_get_next_cache_block(this, &block, event, len);
if (status == DVDNAV_STATUS_OK && block != buf) {
/* we received a block from the cache, copy it, so we can give it back */
memcpy(buf, block, DVD_VIDEO_LB_LEN);
dvdnav_free_cache_block(this, block);
}
return status;
}
int64_t dvdnav_get_current_time(dvdnav_t *this) {
int i;
int64_t tm=0;
dvd_state_t *state = &this->vm->state;
for(i=0; i<state->cellN-1; i++) {
if(!
(state->pgc->cell_playback[i].block_type == BLOCK_TYPE_ANGLE_BLOCK &&
state->pgc->cell_playback[i].block_mode != BLOCK_MODE_FIRST_CELL)
)
tm += dvdnav_convert_time(&state->pgc->cell_playback[i].playback_time);
}
tm += this->cur_cell_time;
return tm;
}
dvdnav_status_t dvdnav_get_next_cache_block(dvdnav_t *this, uint8_t **buf,
int32_t *event, int32_t *len) {
dvd_state_t *state;
int32_t result;
if(!this)
return DVDNAV_STATUS_ERR;
pthread_mutex_lock(&this->vm_lock);
if(!this->started) {
/* Start the VM */
if (!vm_start(this->vm)) {
printerr("Encrypted or faulty DVD");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
this->started = 1;
}
state = &(this->vm->state);
(*event) = DVDNAV_NOP;
(*len) = 0;
/* Check the STOP flag */
if(this->vm->stopped) {
vm_stop(this->vm);
(*event) = DVDNAV_STOP;
this->started = 0;
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
vm_position_get(this->vm, &this->position_next);
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: POS-NEXT ");
vm_position_print(this->vm, &this->position_next);
fprintf(MSG_OUT, "libdvdnav: POS-CUR ");
vm_position_print(this->vm, &this->position_current);
#endif
/* did we hop? */
if(this->position_current.hop_channel != this->position_next.hop_channel) {
(*event) = DVDNAV_HOP_CHANNEL;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: HOP_CHANNEL\n");
#endif
if (this->position_next.hop_channel - this->position_current.hop_channel >= HOP_SEEK) {
int32_t num_angles = 0, current;
/* we seeked -> check for multiple angles */
vm_get_angle_info(this->vm, ¤t, &num_angles);
if (num_angles > 1) {
int32_t result, block;
/* we have to skip the first VOBU when seeking in a multiangle feature,
* because it might belong to the wrong angle */
block = this->position_next.cell_start + this->position_next.block;
result = dvdnav_read_cache_block(this->cache, block, 1, buf);
if(result <= 0) {
printerr("Error reading NAV packet.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
/* Decode nav into pci and dsi. Then get next VOBU info. */
if(!dvdnav_decode_packet(*buf, &this->dsi, &this->pci)) {
printerr("Expected NAV packet but none found.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
dvdnav_get_vobu(this, &this->dsi, &this->pci, &this->vobu);
/* skip to next, if there is a next */
if (this->vobu.vobu_next != SRI_END_OF_CELL) {
this->vobu.vobu_start += this->vobu.vobu_next;
this->vobu.vobu_next = 0;
}
/* update VM state */
this->vm->state.blockN = this->vobu.vobu_start - this->position_next.cell_start;
}
}
this->position_current.hop_channel = this->position_next.hop_channel;
/* update VOBU info */
this->vobu.vobu_start = this->position_next.cell_start + this->position_next.block;
this->vobu.vobu_next = 0;
/* Make blockN == vobu_length to do expected_nav */
this->vobu.vobu_length = 0;
this->vobu.blockN = 0;
this->sync_wait = 0;
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
/* Check the HIGHLIGHT flag */
if(this->position_current.button != this->position_next.button) {
dvdnav_highlight_event_t *hevent = (dvdnav_highlight_event_t *)*buf;
(*event) = DVDNAV_HIGHLIGHT;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: HIGHLIGHT\n");
#endif
(*len) = sizeof(dvdnav_highlight_event_t);
hevent->display = 1;
hevent->buttonN = this->position_next.button;
this->position_current.button = this->position_next.button;
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
/* Check the WAIT flag */
if(this->sync_wait) {
(*event) = DVDNAV_WAIT;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: WAIT\n");
#endif
(*len) = 0;
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
/* Check to see if we need to change the currently opened VOB or open
* a new one because we don't currently have an opened VOB. */
if((this->file == NULL) ||
(this->position_current.vts != this->position_next.vts) ||
(this->position_current.domain != this->position_next.domain)) {
dvd_read_domain_t domain;
int32_t vtsN;
dvdnav_vts_change_event_t *vts_event = (dvdnav_vts_change_event_t *)*buf;
if(this->file) {
DVDCloseFile(this->file);
this->file = NULL;
}
vts_event->old_vtsN = this->position_current.vts;
vts_event->old_domain = this->position_current.domain;
/* Use the DOMAIN to find whether to open menu or title VOBs */
switch(this->position_next.domain) {
case DVD_DOMAIN_FirstPlay:
case DVD_DOMAIN_VMGM:
domain = DVD_READ_MENU_VOBS;
vtsN = 0;
break;
case DVD_DOMAIN_VTSMenu:
domain = DVD_READ_MENU_VOBS;
vtsN = this->position_next.vts;
break;
case DVD_DOMAIN_VTSTitle:
domain = DVD_READ_TITLE_VOBS;
vtsN = this->position_next.vts;
break;
default:
printerr("Unknown domain when changing VTS.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
this->position_current.vts = this->position_next.vts;
this->position_current.domain = this->position_next.domain;
dvdnav_read_cache_clear(this->cache);
this->file = DVDOpenFile(vm_get_dvd_reader(this->vm), vtsN, domain);
vts_event->new_vtsN = this->position_next.vts;
vts_event->new_domain = this->position_next.domain;
/* If couldn't open the file for some reason, moan */
if(this->file == NULL) {
printerrf("Error opening vtsN=%i, domain=%i.", vtsN, domain);
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
/* File opened successfully so return a VTS change event */
(*event) = DVDNAV_VTS_CHANGE;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: VTS_CHANGE\n");
#endif
(*len) = sizeof(dvdnav_vts_change_event_t);
this->spu_clut_changed = 1;
this->position_current.cell = -1; /* Force an update */
this->position_current.spu_channel = -1; /* Force an update */
this->position_current.audio_channel = -1; /* Force an update */;
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
/* Check if the cell changed */
if( (this->position_current.cell != this->position_next.cell) ||
(this->position_current.cell_restart != this->position_next.cell_restart) ||
(this->position_current.cell_start != this->position_next.cell_start) ) {
dvdnav_cell_change_event_t *cell_event = (dvdnav_cell_change_event_t *)*buf;
int32_t first_cell_nr, last_cell_nr, i;
dvd_state_t *state = &this->vm->state;
this->cur_cell_time = 0;
(*event) = DVDNAV_CELL_CHANGE;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: CELL_CHANGE\n");
#endif
(*len) = sizeof(dvdnav_cell_change_event_t);
cell_event->cellN = state->cellN;
cell_event->pgN = state->pgN;
cell_event->cell_length =
(state->pgc->cell_playback[state->cellN - 1].last_sector + 1);
cell_event->pg_length = 0;
/* Find start cell of program. */
first_cell_nr = state->pgc->program_map[state->pgN-1];
/* Find end cell of program */
if(state->pgN < state->pgc->nr_of_programs)
last_cell_nr = state->pgc->program_map[state->pgN] - 1;
else
last_cell_nr = state->pgc->nr_of_cells;
for (i = first_cell_nr; i <= last_cell_nr; i++)
cell_event->pg_length +=
(state->pgc->cell_playback[i - 1].last_sector + 1);
cell_event->pgc_length = dvdnav_convert_time(&state->pgc->playback_time);
cell_event->cell_start = 0;
for (i = 1; i < state->cellN; i++)
cell_event->cell_start +=
(state->pgc->cell_playback[i - 1].last_sector + 1);
cell_event->pg_start = 0;
for (i = 1; i < state->pgc->program_map[state->pgN-1]; i++)
cell_event->pg_start +=
(state->pgc->cell_playback[i - 1].last_sector + 1);
this->position_current.cell = this->position_next.cell;
this->position_current.cell_restart = this->position_next.cell_restart;
this->position_current.cell_start = this->position_next.cell_start;
this->position_current.block = this->position_next.block;
/* vobu info is used for mid cell resumes */
this->vobu.vobu_start = this->position_next.cell_start + this->position_next.block;
this->vobu.vobu_next = 0;
/* Make blockN == vobu_length to do expected_nav */
this->vobu.vobu_length = 0;
this->vobu.blockN = 0;
/* update the spu palette at least on PGC changes */
this->spu_clut_changed = 1;
this->position_current.spu_channel = -1; /* Force an update */
this->position_current.audio_channel = -1; /* Force an update */
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
/* has the CLUT changed? */
if(this->spu_clut_changed) {
(*event) = DVDNAV_SPU_CLUT_CHANGE;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: SPU_CLUT_CHANGE\n");
#endif
(*len) = 16 * sizeof(uint32_t);
memcpy(*buf, state->pgc->palette, sizeof(state->pgc->palette));
this->spu_clut_changed = 0;
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
/* has the SPU channel changed? */
if(this->position_current.spu_channel != this->position_next.spu_channel) {
dvdnav_spu_stream_change_event_t *stream_change = (dvdnav_spu_stream_change_event_t *)*buf;
(*event) = DVDNAV_SPU_STREAM_CHANGE;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: SPU_STREAM_CHANGE\n");
#endif
(*len) = sizeof(dvdnav_spu_stream_change_event_t);
stream_change->physical_wide = vm_get_subp_active_stream(this->vm, 0);
stream_change->physical_letterbox = vm_get_subp_active_stream(this->vm, 1);
stream_change->physical_pan_scan = vm_get_subp_active_stream(this->vm, 2);
this->position_current.spu_channel = this->position_next.spu_channel;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: SPU_STREAM_CHANGE stream_id_wide=%d\n",stream_change->physical_wide);
fprintf(MSG_OUT, "libdvdnav: SPU_STREAM_CHANGE stream_id_letterbox=%d\n",stream_change->physical_letterbox);
fprintf(MSG_OUT, "libdvdnav: SPU_STREAM_CHANGE stream_id_pan_scan=%d\n",stream_change->physical_pan_scan);
fprintf(MSG_OUT, "libdvdnav: SPU_STREAM_CHANGE returning DVDNAV_STATUS_OK\n");
#endif
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
/* has the audio channel changed? */
if(this->position_current.audio_channel != this->position_next.audio_channel) {
dvdnav_audio_stream_change_event_t *stream_change = (dvdnav_audio_stream_change_event_t *)*buf;
(*event) = DVDNAV_AUDIO_STREAM_CHANGE;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: AUDIO_STREAM_CHANGE\n");
#endif
(*len) = sizeof(dvdnav_audio_stream_change_event_t);
stream_change->physical = vm_get_audio_active_stream( this->vm );
stream_change->logical = this->position_next.audio_channel;
this->position_current.audio_channel = this->position_next.audio_channel;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: AUDIO_STREAM_CHANGE stream_id=%d returning DVDNAV_STATUS_OK\n",stream_change->physical);
#endif
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
/* Check the STILLFRAME flag */
if(this->position_current.still != 0) {
dvdnav_still_event_t *still_event = (dvdnav_still_event_t *)*buf;
(*event) = DVDNAV_STILL_FRAME;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: STILL_FRAME\n");
#endif
(*len) = sizeof(dvdnav_still_event_t);
still_event->length = this->position_current.still;
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
/* Have we reached the end of a VOBU? */
if (this->vobu.blockN >= this->vobu.vobu_length) {
/* Have we reached the end of a cell? */
if(this->vobu.vobu_next == SRI_END_OF_CELL) {
/* End of Cell from NAV DSI info */
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: Still set to %x\n", this->position_next.still);
#endif
this->position_current.still = this->position_next.still;
/* we are about to leave a cell, so a lot of state changes could occur;
* under certain conditions, the application should get in sync with us before this,
* otherwise it might show stills or menus too shortly */
if ((this->position_current.still || this->pci.hli.hl_gi.hli_ss) && !this->sync_wait_skip)
this->sync_wait = 1;
if(!this->position_current.still || this->skip_still ) {
/* no active cell still -> get us to the next cell */
vm_get_next_cell(this->vm);
this->position_current.still = 0; /* still gets activated at end of cell */
this->skip_still = 0;
this->sync_wait_skip = 0;
}
/* handle related state changes in next iteration */
(*event) = DVDNAV_NOP;
(*len) = 0;
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
/* at the start of the next VOBU -> expecting NAV packet */
result = dvdnav_read_cache_block(this->cache, this->vobu.vobu_start + this->vobu.vobu_next, 1, buf);
if(result <= 0) {
printerr("Error reading NAV packet.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
/* Decode nav into pci and dsi. Then get next VOBU info. */
if(!dvdnav_decode_packet(*buf, &this->dsi, &this->pci)) {
printerr("Expected NAV packet but none found.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
/* We need to update the vm state->blockN with which VOBU we are in.
* This is so RSM resumes to the VOBU level and not just the CELL level.
*/
this->vm->state.blockN = this->vobu.vobu_start - this->position_current.cell_start;
dvdnav_get_vobu(this, &this->dsi, &this->pci, &this->vobu);
this->vobu.blockN = 0;
/* Give the cache a hint about the size of next VOBU.
* This improves pre-caching, because the VOBU will almost certainly be read entirely.
*/
dvdnav_pre_cache_blocks(this->cache, this->vobu.vobu_start+1, this->vobu.vobu_length+1);
/* release NAV menu filter, when we reach the same NAV packet again */
if (this->last_cmd_nav_lbn == this->pci.pci_gi.nv_pck_lbn)
this->last_cmd_nav_lbn = SRI_END_OF_CELL;
/* Successfully got a NAV packet */
(*event) = DVDNAV_NAV_PACKET;
#ifdef LOG_DEBUG
fprintf(MSG_OUT, "libdvdnav: NAV_PACKET\n");
#endif
(*len) = 2048;
this->cur_cell_time = dvdnav_convert_time(&this->dsi.dsi_gi.c_eltm);
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
/* If we've got here, it must just be a normal block. */
if(!this->file) {
printerr("Attempting to read without opening file.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
this->vobu.blockN++;
result = dvdnav_read_cache_block(this->cache, this->vobu.vobu_start + this->vobu.blockN, 1, buf);
if(result <= 0) {
printerr("Error reading from DVD.");
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_ERR;
}
(*event) = DVDNAV_BLOCK_OK;
(*len) = 2048;
pthread_mutex_unlock(&this->vm_lock);
return DVDNAV_STATUS_OK;
}
dvdnav_status_t dvdnav_get_title_string(dvdnav_t *this, const char **title_str) {
(*title_str) = this->vm->dvd_name;
return DVDNAV_STATUS_OK;
}
dvdnav_status_t dvdnav_get_serial_string(dvdnav_t *this, const char **serial_str) {
(*serial_str) = this->vm->dvd_serial;
return DVDNAV_STATUS_OK;
}
uint8_t dvdnav_get_video_aspect(dvdnav_t *this) {
uint8_t retval;
if(!this->started) {
printerr("Virtual DVD machine not started.");
return -1;
}
pthread_mutex_lock(&this->vm_lock);
retval = (uint8_t)vm_get_video_aspect(this->vm);
pthread_mutex_unlock(&this->vm_lock);
return retval;
}
int dvdnav_get_video_resolution(dvdnav_t *this, uint32_t *width, uint32_t *height) {
int w, h;
if(!this->started) {
printerr("Virtual DVD machine not started.");
return -1;
}
pthread_mutex_lock(&this->vm_lock);
vm_get_video_res(this->vm, &w, &h);
pthread_mutex_unlock(&this->vm_lock);
*width = w;
*height = h;
return 0;
}
uint8_t dvdnav_get_video_scale_permission(dvdnav_t *this) {
uint8_t retval;
if(!this->started) {
printerr("Virtual DVD machine not started.");
return -1;
}
pthread_mutex_lock(&this->vm_lock);
retval = (uint8_t)vm_get_video_scale_permission(this->vm);
pthread_mutex_unlock(&this->vm_lock);
return retval;
}
uint16_t dvdnav_audio_stream_to_lang(dvdnav_t *this, uint8_t stream) {
audio_attr_t attr;
if(!this->started) {
printerr("Virtual DVD machine not started.");
return -1;
}
pthread_mutex_lock(&this->vm_lock);
attr = vm_get_audio_attr(this->vm, stream);
pthread_mutex_unlock(&this->vm_lock);
if(attr.lang_type != 1)
return 0xffff;
return attr.lang_code;
}
uint16_t dvdnav_audio_stream_format(dvdnav_t *this, uint8_t stream) {
audio_attr_t attr;
uint16_t format;
if(!this->started) {
printerr("Virtual DVD machine not started.");
return -1; /* 0xffff */
}
pthread_mutex_lock(&this->vm_lock);
attr = vm_get_audio_attr(this->vm, stream);
pthread_mutex_unlock(&this->vm_lock);