bool CDVDInputStreamNavigator::SeekChapter(int iChapter)
{
bool enabled = IsSubtitleStreamEnabled();
int audio = GetActiveAudioStream();
int subtitle = GetActiveSubtitleStream();
if (iChapter == (m_iPart + 1))
{
if (m_dll.dvdnav_next_pg_search(m_dvdnav) == DVDNAV_STATUS_ERR)
{
CLog::Log(LOGERROR, "dvdnav: dvdnav_next_pg_search( %s )", m_dll.dvdnav_err_to_string(m_dvdnav));
return false;
}
}
else
if (iChapter == (m_iPart - 1))
{
if (m_dll.dvdnav_prev_pg_search(m_dvdnav) == DVDNAV_STATUS_ERR)
{
CLog::Log(LOGERROR, "dvdnav: dvdnav_prev_pg_search( %s )", m_dll.dvdnav_err_to_string(m_dvdnav));
return false;
}
}
else
if (m_dll.dvdnav_part_play(m_dvdnav, m_iTitle, iChapter) == DVDNAV_STATUS_ERR)
{
CLog::Log(LOGERROR, "dvdnav: dvdnav_part_play failed( %s )", m_dll.dvdnav_err_to_string(m_dvdnav));
return false;
}
SetActiveSubtitleStream(subtitle);
SetActiveAudioStream(audio);
EnableSubtitleStream(enabled);
return true;
}
bool CDVDInputStreamNavigator::SeekChapter(int iChapter)
{
if (!m_dvdnav)
return false;
// cannot allow to return true in case of buttons (overlays) because otherwise back in DVDPlayer FlushBuffers will remove menu overlays
// therefore we just skip the request in case there are buttons and return false
if (IsInMenu() && GetTotalButtons() > 0)
{
CLog::Log(LOGDEBUG, "%s - Seeking chapter is not allowed in menu set with buttons", __FUNCTION__);
return false;
}
bool enabled = IsSubtitleStreamEnabled();
int audio = GetActiveAudioStream();
int subtitle = GetActiveSubtitleStream();
if (iChapter == (m_iPart + 1))
{
if (m_dll.dvdnav_next_pg_search(m_dvdnav) == DVDNAV_STATUS_ERR)
{
CLog::Log(LOGERROR, "dvdnav: dvdnav_next_pg_search( %s )", m_dll.dvdnav_err_to_string(m_dvdnav));
return false;
}
}
else
if (iChapter == (m_iPart - 1))
{
if (m_dll.dvdnav_prev_pg_search(m_dvdnav) == DVDNAV_STATUS_ERR)
{
CLog::Log(LOGERROR, "dvdnav: dvdnav_prev_pg_search( %s )", m_dll.dvdnav_err_to_string(m_dvdnav));
return false;
}
}
else
if (m_dll.dvdnav_part_play(m_dvdnav, m_iTitle, iChapter) == DVDNAV_STATUS_ERR)
{
CLog::Log(LOGERROR, "dvdnav: dvdnav_part_play failed( %s )", m_dll.dvdnav_err_to_string(m_dvdnav));
return false;
}
SetActiveSubtitleStream(subtitle);
SetActiveAudioStream(audio);
EnableSubtitleStream(enabled);
return true;
}
int CDVDInputStreamNavigator::ProcessBlock(BYTE* dest_buffer, int* read)
{
if (!m_dvdnav) return -1;
int result;
int len;
int iNavresult = NAVRESULT_NOP;
// m_tempbuffer will be used for anything that isn't a normal data block
uint8_t* buf = m_lastblock;
iNavresult = -1;
if(m_holdmode == HOLDMODE_HELD)
return NAVRESULT_HOLD;
try
{
// the main reading function
if(m_holdmode == HOLDMODE_SKIP)
{ /* we where holding data, return the data held */
m_holdmode = HOLDMODE_DATA;
result = DVDNAV_STATUS_OK;
}
else
result = m_dll.dvdnav_get_next_cache_block(m_dvdnav, &buf, &m_lastevent, &len);
}
catch (...)
{
CLog::Log(LOGERROR, "CDVDInputStreamNavigator::ProcessBlock - exception thrown in dvdnav_get_next_cache_block.");
// okey, we are probably holding a vm_lock here so leave it.. this could potentialy cause problems if we aren't holding it
// but it's more likely that we do
LeaveCriticalSection((LPCRITICAL_SECTION)&(m_dvdnav->vm_lock));
m_bEOF = true;
return NAVRESULT_ERROR;
}
if (result == DVDNAV_STATUS_ERR)
{
CLog::Log(LOGERROR,"Error getting next block: %s\n", m_dll.dvdnav_err_to_string(m_dvdnav));
m_bEOF = true;
return NAVRESULT_ERROR;
}
switch (m_lastevent)
{
case DVDNAV_BLOCK_OK:
{
// We have received a regular block of the currently playing MPEG stream.
// buf contains the data and len its length (obviously!) (which is always 2048 bytes btw)
m_holdmode = HOLDMODE_NONE;
memcpy(dest_buffer, buf, len);
*read = len;
iNavresult = NAVRESULT_DATA;
}
break;
case DVDNAV_NOP:
// Nothing to do here.
break;
case DVDNAV_STILL_FRAME:
{
// We have reached a still frame. A real player application would wait
// the amount of time specified by the still's length while still handling
// user input to make menus and other interactive stills work.
// A length of 0xff means an indefinite still which has to be skipped
// indirectly by some user interaction.
iNavresult = m_pDVDPlayer->OnDVDNavResult(buf, DVDNAV_STILL_FRAME);
/* if user didn't care for action, just skip it */
if(iNavresult == NAVRESULT_NOP)
SkipStill();
}
break;
case DVDNAV_WAIT:
{
// We have reached a point in DVD playback, where timing is critical.
// Player application with internal fifos can introduce state
// inconsistencies, because libdvdnav is always the fifo's length
// ahead in the stream compared to what the application sees.
// Such applications should wait until their fifos are empty
// when they receive this type of event.
if(m_holdmode == HOLDMODE_NONE)
{
CLog::Log(LOGDEBUG, " - DVDNAV_WAIT (HOLDING)");
m_holdmode = HOLDMODE_HELD;
iNavresult = NAVRESULT_HOLD;
}
else
iNavresult = m_pDVDPlayer->OnDVDNavResult(buf, DVDNAV_WAIT);
/* if user didn't care for action, just skip it */
if(iNavresult == NAVRESULT_NOP)
SkipWait();
}
break;
case DVDNAV_SPU_CLUT_CHANGE:
// Player applications should pass the new colour lookup table to their
// SPU decoder. The CLUT is given as 16 uint32_t's in the buffer.
{
iNavresult = m_pDVDPlayer->OnDVDNavResult(buf, DVDNAV_SPU_CLUT_CHANGE);
}
break;
case DVDNAV_SPU_STREAM_CHANGE:
// Player applications should inform their SPU decoder to switch channels
{
dvdnav_spu_stream_change_event_t* event = (dvdnav_spu_stream_change_event_t*)buf;
//libdvdnav never sets logical, why.. don't know..
event->logical = GetActiveSubtitleStream();
if(event->logical<0 && GetSubTitleStreamCount()>0)
{
/* this will not take effect in this event */
CLog::Log(LOGINFO, "%s - none or invalid subtitle stream selected, defaulting to first", __FUNCTION__);
SetActiveSubtitleStream(0);
}
m_bCheckButtons = true;
iNavresult = m_pDVDPlayer->OnDVDNavResult(buf, DVDNAV_SPU_STREAM_CHANGE);
}
break;
case DVDNAV_AUDIO_STREAM_CHANGE:
// Player applications should inform their audio decoder to switch channels
{
//dvdnav_get_audio_logical_stream actually does the oposite to the docs..
//taking a audiostream as given on dvd, it gives the physical stream that
//refers to in the mpeg file
dvdnav_audio_stream_change_event_t* event = (dvdnav_audio_stream_change_event_t*)buf;
//wroong... stupid docs..
//event->logical = dvdnav_get_audio_logical_stream(m_dvdnav, event->physical);
//logical should actually be set to the (vm->state).AST_REG
event->logical = GetActiveAudioStream();
if(event->logical<0)
{
/* this will not take effect in this event */
CLog::Log(LOGINFO, "%s - none or invalid audio stream selected, defaulting to first", __FUNCTION__);
SetActiveAudioStream(0);
}
iNavresult = m_pDVDPlayer->OnDVDNavResult(buf, DVDNAV_AUDIO_STREAM_CHANGE);
}
break;
case DVDNAV_HIGHLIGHT:
{
iNavresult = m_pDVDPlayer->OnDVDNavResult(buf, DVDNAV_HIGHLIGHT);
}
break;
case DVDNAV_VTS_CHANGE:
// Some status information like video aspect and video scale permissions do
// not change inside a VTS. Therefore this event can be used to query such
// information only when necessary and update the decoding/displaying
// accordingly.
{
if(m_holdmode == HOLDMODE_NONE)
{
CLog::Log(LOGDEBUG, " - DVDNAV_VTS_CHANGE (HOLDING)");
m_holdmode = HOLDMODE_HELD;
iNavresult = NAVRESULT_HOLD;
}
else
iNavresult = m_pDVDPlayer->OnDVDNavResult(buf, DVDNAV_VTS_CHANGE);
m_bInMenu = (0 == m_dll.dvdnav_is_domain_vts(m_dvdnav));
}
break;
case DVDNAV_CELL_CHANGE:
{
// Some status information like the current Title and Part numbers do not
// change inside a cell. Therefore this event can be used to query such
// information only when necessary and update the decoding/displaying
// accordingly.
// this may lead to a discontinuity, but it's also the end of the
// vobunit, so make sure everything in demuxer is output
if(m_holdmode == HOLDMODE_NONE)
{
CLog::Log(LOGDEBUG, "DVDNAV_CELL_CHANGE (HOLDING)");
m_holdmode = HOLDMODE_HELD;
iNavresult = NAVRESULT_HOLD;
break;
}
uint32_t pos, len;
m_dll.dvdnav_current_title_info(m_dvdnav, &m_iTitle, &m_iPart);
m_dll.dvdnav_get_number_of_titles(m_dvdnav, &m_iTitleCount);
if(m_iTitle > 0)
m_dll.dvdnav_get_number_of_parts(m_dvdnav, m_iTitle, &m_iPartCount);
else
m_iPartCount = 0;
m_dll.dvdnav_get_position(m_dvdnav, &pos, &len);
CLog::Log(LOGDEBUG, "%s - Cell change: Title %d, Chapter %d\n", __FUNCTION__, m_iTitle, m_iPart);
CLog::Log(LOGDEBUG, "%s - At position %.0f%% inside the feature\n", __FUNCTION__, 100 * (double)pos / (double)len);
//Get total segment time
dvdnav_cell_change_event_t* cell_change_event = (dvdnav_cell_change_event_t*)buf;
m_iCellStart = cell_change_event->cell_start; // store cell time as we need that for time later
m_iTotalTime = (int) (cell_change_event->pgc_length / 90);
m_icurrentGroupId = cell_change_event->pgN * 1000 + cell_change_event->cellN;
iNavresult = m_pDVDPlayer->OnDVDNavResult(buf, DVDNAV_CELL_CHANGE);
}
break;
case DVDNAV_NAV_PACKET:
{
// A NAV packet provides PTS discontinuity information, angle linking information and
// button definitions for DVD menus. Angles are handled completely inside libdvdnav.
// For the menus to work, the NAV packet information has to be passed to the overlay
// engine of the player so that it knows the dimensions of the button areas.
// Applications with fifos should not use these functions to retrieve NAV packets,
// they should implement their own NAV handling, because the packet you get from these
// functions will already be ahead in the stream which can cause state inconsistencies.
// Applications with fifos should therefore pass the NAV packet through the fifo
// and decoding pipeline just like any other data.
// Calculate current time
//unsigned int pos, len;
//m_dll.dvdnav_get_position(m_dvdnav, &pos, &len);
//m_iTime = (int)(((__int64)m_iTotalTime * pos) / len);
pci_t* pci = m_dll.dvdnav_get_current_nav_pci(m_dvdnav);
m_dll.dvdnav_get_current_nav_dsi(m_dvdnav);
if(!pci)
{
iNavresult = NAVRESULT_NOP;
break;
}
/* if we have any buttons or are not in vts domain we assume we are in meny */
m_bInMenu = pci->hli.hl_gi.hli_ss || (0 == m_dll.dvdnav_is_domain_vts(m_dvdnav));
/* check for any gap in the stream, this is likely a discontinuity */
__int64 gap = (__int64)pci->pci_gi.vobu_s_ptm - m_iVobUnitStop;
if(gap)
{
/* make sure demuxer is flushed before we change any correction */
if(m_holdmode == HOLDMODE_NONE)
{
CLog::Log(LOGDEBUG, "DVDNAV_NAV_PACKET (HOLDING)");
m_holdmode = HOLDMODE_HELD;
iNavresult = NAVRESULT_HOLD;
break;
}
m_iVobUnitCorrection += gap;
CLog::Log(LOGDEBUG, "DVDNAV_NAV_PACKET - DISCONTINUITY FROM:%"PRId64" TO:%"PRId64" DIFF:%"PRId64, (m_iVobUnitStop * 1000)/90, ((__int64)pci->pci_gi.vobu_s_ptm*1000)/90, (gap*1000)/90);
}
m_iVobUnitStart = pci->pci_gi.vobu_s_ptm;
m_iVobUnitStop = pci->pci_gi.vobu_e_ptm;
m_iTime = (int) ( m_dll.dvdnav_convert_time( &(pci->pci_gi.e_eltm) ) + m_iCellStart ) / 90;
if (m_bCheckButtons)
{
CheckButtons();
m_bCheckButtons = false;
}
iNavresult = m_pDVDPlayer->OnDVDNavResult((void*)pci, DVDNAV_NAV_PACKET);
}
break;
case DVDNAV_HOP_CHANNEL:
// This event is issued whenever a non-seamless operation has been executed.
// Applications with fifos should drop the fifos content to speed up responsiveness.
{
iNavresult = m_pDVDPlayer->OnDVDNavResult(NULL, DVDNAV_HOP_CHANNEL);
}
break;
case DVDNAV_STOP:
{
// Playback should end here.
// don't read any further, it could be libdvdnav had some problems reading
// the disc. reading further results in a crash
m_bEOF = true;
m_pDVDPlayer->OnDVDNavResult(NULL, DVDNAV_STOP);
iNavresult = NAVRESULT_ERROR;
}
break;
default:
{
CLog::Log(LOGDEBUG,"CDVDInputStreamNavigator: Unknown event (%i)\n", m_lastevent);
}
break;
}
// check if libdvdnav gave us some other buffer to work with
// probably not needed since function will check if buf
// is part of the internal cache, but do it for good measure
if( buf != m_lastblock )
m_dll.dvdnav_free_cache_block(m_dvdnav, buf);
return iNavresult;
}
