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DVDDemuxFFmpeg.cpp
1322 lines (1150 loc) · 41 KB
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DVDDemuxFFmpeg.cpp
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/*
* Copyright (C) 2005-2008 Team XBMC
* http://www.xbmc.org
*
* 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, 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 XBMC; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
* http://www.gnu.org/copyleft/gpl.html
*
*/
#include "threads/SystemClock.h"
#include "system.h"
#ifndef __STDC_CONSTANT_MACROS
#define __STDC_CONSTANT_MACROS
#endif
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS
#endif
#ifdef _LINUX
#include "stdint.h"
#endif
#include "DVDDemuxFFmpeg.h"
#include "DVDInputStreams/DVDInputStream.h"
#include "DVDInputStreams/DVDInputStreamNavigator.h"
#ifdef HAVE_LIBBLURAY
#include "DVDInputStreams/DVDInputStreamBluray.h"
#endif
#include "DVDDemuxUtils.h"
#include "DVDClock.h" // for DVD_TIME_BASE
#include "utils/Win32Exception.h"
#include "settings/AdvancedSettings.h"
#include "settings/GUISettings.h"
#include "filesystem/File.h"
#include "filesystem/Directory.h"
#include "utils/log.h"
#include "threads/Thread.h"
#include "utils/TimeUtils.h"
void CDemuxStreamAudioFFmpeg::GetStreamInfo(std::string& strInfo)
{
if(!m_stream) return;
char temp[128];
m_parent->m_dllAvCodec.avcodec_string(temp, 128, m_stream->codec, 0);
strInfo = temp;
}
void CDemuxStreamAudioFFmpeg::GetStreamName(std::string& strInfo)
{
if(!m_stream) return;
if(!m_description.empty())
strInfo = m_description;
else
CDemuxStream::GetStreamName(strInfo);
}
void CDemuxStreamSubtitleFFmpeg::GetStreamName(std::string& strInfo)
{
if(!m_stream) return;
if(!m_description.empty())
strInfo = m_description;
else
CDemuxStream::GetStreamName(strInfo);
}
void CDemuxStreamVideoFFmpeg::GetStreamInfo(std::string& strInfo)
{
if(!m_stream) return;
char temp[128];
m_parent->m_dllAvCodec.avcodec_string(temp, 128, m_stream->codec, 0);
strInfo = temp;
}
void CDemuxStreamSubtitleFFmpeg::GetStreamInfo(std::string& strInfo)
{
if(!m_stream) return;
char temp[128];
m_parent->m_dllAvCodec.avcodec_string(temp, 128, m_stream->codec, 0);
strInfo = temp;
}
// these need to be put somewhere that are compiled, we should have some better place for it
CCriticalSection DllAvCodec::m_critSection;
static CCriticalSection m_logSection;
std::map<uintptr_t, CStdString> g_logbuffer;
void ff_avutil_log(void* ptr, int level, const char* format, va_list va)
{
CSingleLock lock(m_logSection);
uintptr_t threadId = (uintptr_t)CThread::GetCurrentThreadId();
CStdString &buffer = g_logbuffer[threadId];
AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
if(level >= AV_LOG_DEBUG && g_advancedSettings.m_logLevel <= LOG_LEVEL_DEBUG_SAMBA)
return;
else if(g_advancedSettings.m_logLevel <= LOG_LEVEL_NORMAL)
return;
int type;
switch(level)
{
case AV_LOG_INFO : type = LOGINFO; break;
case AV_LOG_ERROR : type = LOGERROR; break;
case AV_LOG_DEBUG :
default : type = LOGDEBUG; break;
}
CStdString message, prefix;
message.FormatV(format, va);
prefix.Format("ffmpeg[%X]: ", threadId);
if(avc)
{
if(avc->item_name)
prefix += CStdString("[") + avc->item_name(ptr) + "] ";
else if(avc->class_name)
prefix += CStdString("[") + avc->class_name + "] ";
}
buffer += message;
int pos, start = 0;
while( (pos = buffer.find_first_of('\n', start)) >= 0 )
{
if(pos>start)
CLog::Log(type, "%s%s", prefix.c_str(), buffer.substr(start, pos-start).c_str());
start = pos+1;
}
buffer.erase(0, start);
}
static void ff_flush_avutil_log_buffers(void)
{
CSingleLock lock(DllAvCodec::m_critSection);
/* Loop through the logbuffer list and remove any blank buffers
If the thread using the buffer is still active, it will just
add a new buffer next time it writes to the log */
std::map<uintptr_t, CStdString>::iterator it;
for (it = g_logbuffer.begin(); it != g_logbuffer.end(); )
if ((*it).second.IsEmpty())
g_logbuffer.erase(it++);
else
++it;
}
#ifdef _MSC_VER
static __declspec(thread) CDVDDemuxFFmpeg* g_demuxer = 0;
#else
static TLS g_tls;
#define g_demuxer (*((CDVDDemuxFFmpeg**)g_tls.Get()))
#endif
static int interrupt_cb(void* unused)
{
if(g_demuxer && g_demuxer->Aborted())
return 1;
return 0;
}
////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////
/*
static int dvd_file_open(URLContext *h, const char *filename, int flags)
{
return -1;
}
*/
static int dvd_file_read(void *h, uint8_t* buf, int size)
{
if(interrupt_cb(NULL))
return -1;
CDVDInputStream* pInputStream = (CDVDInputStream*)h;
return pInputStream->Read(buf, size);
}
/*
static int dvd_file_write(URLContext *h, BYTE* buf, int size)
{
return -1;
}
*/
static offset_t dvd_file_seek(void *h, offset_t pos, int whence)
{
if(interrupt_cb(NULL))
return -1;
CDVDInputStream* pInputStream = (CDVDInputStream*)h;
if(whence == AVSEEK_SIZE)
return pInputStream->GetLength();
else
return pInputStream->Seek(pos, whence & ~AVSEEK_FORCE);
}
////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////
CDVDDemuxFFmpeg::CDVDDemuxFFmpeg() : CDVDDemux()
{
m_pFormatContext = NULL;
m_pInput = NULL;
m_ioContext = NULL;
for (int i = 0; i < MAX_STREAMS; i++) m_streams[i] = NULL;
m_iCurrentPts = DVD_NOPTS_VALUE;
}
CDVDDemuxFFmpeg::~CDVDDemuxFFmpeg()
{
Dispose();
ff_flush_avutil_log_buffers();
}
bool CDVDDemuxFFmpeg::Aborted()
{
if(m_timeout.IsTimePast())
return true;
return false;
}
bool CDVDDemuxFFmpeg::Open(CDVDInputStream* pInput)
{
AVInputFormat* iformat = NULL;
std::string strFile;
m_iCurrentPts = DVD_NOPTS_VALUE;
m_speed = DVD_PLAYSPEED_NORMAL;
g_demuxer = this;
m_program = UINT_MAX;
const AVIOInterruptCB int_cb = { interrupt_cb, NULL };
if (!pInput) return false;
if (!m_dllAvUtil.Load() || !m_dllAvCodec.Load() || !m_dllAvFormat.Load()) {
CLog::Log(LOGERROR,"CDVDDemuxFFmpeg::Open - failed to load ffmpeg libraries");
return false;
}
// register codecs
m_dllAvFormat.av_register_all();
m_pInput = pInput;
strFile = m_pInput->GetFileName();
bool streaminfo = true; /* set to true if we want to look for streams before playback*/
if( m_pInput->GetContent().length() > 0 )
{
std::string content = m_pInput->GetContent();
/* check if we can get a hint from content */
if ( content.compare("video/x-vobsub") == 0 )
iformat = m_dllAvFormat.av_find_input_format("mpeg");
else if( content.compare("video/x-dvd-mpeg") == 0 )
iformat = m_dllAvFormat.av_find_input_format("mpeg");
else if( content.compare("video/x-mpegts") == 0 )
iformat = m_dllAvFormat.av_find_input_format("mpegts");
else if( content.compare("multipart/x-mixed-replace") == 0 )
iformat = m_dllAvFormat.av_find_input_format("mjpeg");
}
// try to abort after 30 seconds
m_timeout.Set(30000);
if( m_pInput->IsStreamType(DVDSTREAM_TYPE_FFMPEG) )
{
// special stream type that makes avformat handle file opening
// allows internal ffmpeg protocols to be used
int result=-1;
if (strFile.substr(0,6) == "mms://")
{
// try mmsh, then mmst
CStdString strFile2;
strFile2.Format("mmsh://%s",strFile.substr(6,strFile.size()-6).c_str());
result = m_dllAvFormat.avformat_open_input(&m_pFormatContext, strFile2.c_str(), iformat, NULL);
if (result < 0)
{
strFile = "mmst://";
strFile += strFile2.Mid(7).c_str();
}
}
if (result < 0 && m_dllAvFormat.avformat_open_input(&m_pFormatContext, strFile.c_str(), iformat, NULL) < 0 )
{
CLog::Log(LOGDEBUG, "Error, could not open file %s", strFile.c_str());
Dispose();
return false;
}
}
else
{
unsigned char* buffer = (unsigned char*)m_dllAvUtil.av_malloc(FFMPEG_FILE_BUFFER_SIZE);
m_ioContext = m_dllAvFormat.avio_alloc_context(buffer, FFMPEG_FILE_BUFFER_SIZE, 0, m_pInput, dvd_file_read, NULL, dvd_file_seek);
m_ioContext->max_packet_size = m_pInput->GetBlockSize();
if(m_ioContext->max_packet_size)
m_ioContext->max_packet_size *= FFMPEG_FILE_BUFFER_SIZE / m_ioContext->max_packet_size;
if(m_pInput->Seek(0, SEEK_POSSIBLE) == 0)
m_ioContext->seekable = 0;
if( iformat == NULL )
{
// let ffmpeg decide which demuxer we have to open
bool trySPDIFonly = (m_pInput->GetContent() == "audio/x-spdif-compressed");
if (!trySPDIFonly)
m_dllAvFormat.av_probe_input_buffer(m_ioContext, &iformat, strFile.c_str(), NULL, 0, 0);
// Use the more low-level code in case we have been built against an old
// FFmpeg without the above av_probe_input_buffer(), or in case we only
// want to probe for spdif (DTS or IEC 61937) compressed audio
// specifically, or in case the file is a wav which may contain DTS or
// IEC 61937 (e.g. ac3-in-wav) and we want to check for those formats.
if (trySPDIFonly || (iformat && strcmp(iformat->name, "wav") == 0))
{
AVProbeData pd;
BYTE probe_buffer[FFMPEG_FILE_BUFFER_SIZE + AVPROBE_PADDING_SIZE];
// init probe data
pd.buf = probe_buffer;
pd.filename = strFile.c_str();
// read data using avformat's buffers
pd.buf_size = m_dllAvFormat.avio_read(m_ioContext, pd.buf, m_ioContext->max_packet_size ? m_ioContext->max_packet_size : m_ioContext->buffer_size);
if (pd.buf_size <= 0)
{
CLog::Log(LOGERROR, "%s - error reading from input stream, %s", __FUNCTION__, strFile.c_str());
return false;
}
memset(pd.buf+pd.buf_size, 0, AVPROBE_PADDING_SIZE);
// restore position again
m_dllAvFormat.avio_seek(m_ioContext , 0, SEEK_SET);
// the advancedsetting is for allowing the user to force outputting the
// 44.1 kHz DTS wav file as PCM, so that an A/V receiver can decode
// it (this is temporary until we handle 44.1 kHz passthrough properly)
if (trySPDIFonly || (iformat && strcmp(iformat->name, "wav") == 0 && !g_advancedSettings.m_dvdplayerIgnoreDTSinWAV))
{
// check for spdif and dts
// This is used with wav files and audio CDs that may contain
// a DTS or AC3 track padded for S/PDIF playback. If neither of those
// is present, we assume it is PCM audio.
// AC3 is always wrapped in iec61937 (ffmpeg "spdif"), while DTS
// may be just padded.
AVInputFormat *iformat2;
iformat2 = m_dllAvFormat.av_find_input_format("spdif");
if (iformat2 && iformat2->read_probe(&pd) > AVPROBE_SCORE_MAX / 4)
{
iformat = iformat2;
}
else
{
// not spdif or no spdif demuxer, try dts
iformat2 = m_dllAvFormat.av_find_input_format("dts");
if (iformat2 && iformat2->read_probe(&pd) > AVPROBE_SCORE_MAX / 4)
{
iformat = iformat2;
}
else if (trySPDIFonly)
{
// not dts either, return false in case we were explicitely
// requested to only check for S/PDIF padded compressed audio
CLog::Log(LOGDEBUG, "%s - not spdif or dts file, fallbacking", __FUNCTION__);
return false;
}
}
}
}
if(!iformat)
{
std::string content = m_pInput->GetContent();
/* check if we can get a hint from content */
if( content.compare("audio/aacp") == 0 )
iformat = m_dllAvFormat.av_find_input_format("aac");
else if( content.compare("audio/aac") == 0 )
iformat = m_dllAvFormat.av_find_input_format("aac");
else if( content.compare("video/flv") == 0 )
iformat = m_dllAvFormat.av_find_input_format("flv");
else if( content.compare("video/x-flv") == 0 )
iformat = m_dllAvFormat.av_find_input_format("flv");
}
if (!iformat)
{
CLog::Log(LOGERROR, "%s - error probing input format, %s", __FUNCTION__, strFile.c_str());
return false;
}
else
{
if (iformat->name)
CLog::Log(LOGDEBUG, "%s - probing detected format [%s]", __FUNCTION__, iformat->name);
else
CLog::Log(LOGDEBUG, "%s - probing detected unnamed format", __FUNCTION__);
}
}
// open the demuxer
m_pFormatContext = m_dllAvFormat.avformat_alloc_context();
m_pFormatContext->pb = m_ioContext;
if (m_dllAvFormat.avformat_open_input(&m_pFormatContext, strFile.c_str(), iformat, NULL) < 0)
{
CLog::Log(LOGERROR, "%s - Error, could not open file %s", __FUNCTION__, strFile.c_str());
Dispose();
return false;
}
}
// set the interrupt callback, appeared in libavformat 53.15.0
m_pFormatContext->interrupt_callback = int_cb;
// analyse very short to speed up mjpeg playback start
if (iformat && (strcmp(iformat->name, "mjpeg") == 0) && m_ioContext->seekable == 0)
m_pFormatContext->max_analyze_duration = 500000;
// we need to know if this is matroska or avi later
m_bMatroska = strncmp(m_pFormatContext->iformat->name, "matroska", 8) == 0; // for "matroska.webm"
m_bAVI = strcmp(m_pFormatContext->iformat->name, "avi") == 0;
if (streaminfo)
{
/* too speed up dvd switches, only analyse very short */
if(m_pInput->IsStreamType(DVDSTREAM_TYPE_DVD))
m_pFormatContext->max_analyze_duration = 500000;
CLog::Log(LOGDEBUG, "%s - avformat_find_stream_info starting", __FUNCTION__);
int iErr = m_dllAvFormat.avformat_find_stream_info(m_pFormatContext, NULL);
if (iErr < 0)
{
CLog::Log(LOGWARNING,"could not find codec parameters for %s", strFile.c_str());
if (m_pInput->IsStreamType(DVDSTREAM_TYPE_DVD) || (m_pFormatContext->nb_streams == 1 && m_pFormatContext->streams[0]->codec->codec_id == CODEC_ID_AC3))
{
// special case, our codecs can still handle it.
}
else
{
Dispose();
return false;
}
}
CLog::Log(LOGDEBUG, "%s - av_find_stream_info finished", __FUNCTION__);
}
// reset any timeout
m_timeout.SetInfinite();
// if format can be nonblocking, let's use that
m_pFormatContext->flags |= AVFMT_FLAG_NONBLOCK;
// print some extra information
m_dllAvFormat.av_dump_format(m_pFormatContext, 0, strFile.c_str(), 0);
UpdateCurrentPTS();
// add the ffmpeg streams to our own stream array
if (m_pFormatContext->nb_programs)
{
// look for first non empty stream and discard nonselected programs
for (unsigned int i = 0; i < m_pFormatContext->nb_programs; i++)
{
if(m_program == UINT_MAX && m_pFormatContext->programs[i]->nb_stream_indexes > 0)
m_program = i;
if(i != m_program)
m_pFormatContext->programs[i]->discard = AVDISCARD_ALL;
}
if(m_program != UINT_MAX)
{
// add streams from selected program
for (unsigned int i = 0; i < m_pFormatContext->programs[m_program]->nb_stream_indexes; i++)
AddStream(m_pFormatContext->programs[m_program]->stream_index[i]);
}
}
// if there were no programs or they were all empty, add all streams
if (m_program == UINT_MAX)
{
for (unsigned int i = 0; i < m_pFormatContext->nb_streams; i++)
AddStream(i);
}
return true;
}
void CDVDDemuxFFmpeg::Dispose()
{
g_demuxer = this;
if (m_pFormatContext)
{
if (m_ioContext && m_pFormatContext->pb && m_pFormatContext->pb != m_ioContext)
{
CLog::Log(LOGWARNING, "CDVDDemuxFFmpeg::Dispose - demuxer changed our byte context behind our back, possible memleak");
m_ioContext = m_pFormatContext->pb;
}
m_dllAvFormat.avformat_close_input(&m_pFormatContext);
}
m_ioContext = NULL;
m_pFormatContext = NULL;
m_speed = DVD_PLAYSPEED_NORMAL;
for (int i = 0; i < MAX_STREAMS; i++)
{
if (m_streams[i])
{
if (m_streams[i]->ExtraData)
delete[] (BYTE*)(m_streams[i]->ExtraData);
delete m_streams[i];
}
m_streams[i] = NULL;
}
m_pInput = NULL;
m_dllAvFormat.Unload();
m_dllAvCodec.Unload();
m_dllAvUtil.Unload();
}
void CDVDDemuxFFmpeg::Reset()
{
CDVDInputStream* pInputStream = m_pInput;
Dispose();
Open(pInputStream);
}
void CDVDDemuxFFmpeg::Flush()
{
g_demuxer = this;
// naughty usage of an internal ffmpeg function
if (m_pFormatContext)
m_dllAvFormat.av_read_frame_flush(m_pFormatContext);
m_iCurrentPts = DVD_NOPTS_VALUE;
}
void CDVDDemuxFFmpeg::Abort()
{
m_timeout.SetExpired();
}
void CDVDDemuxFFmpeg::SetSpeed(int iSpeed)
{
g_demuxer = this;
if(!m_pFormatContext)
return;
if(m_speed != DVD_PLAYSPEED_PAUSE && iSpeed == DVD_PLAYSPEED_PAUSE)
{
m_pInput->Pause((double)m_iCurrentPts);
m_dllAvFormat.av_read_pause(m_pFormatContext);
}
else if(m_speed == DVD_PLAYSPEED_PAUSE && iSpeed != DVD_PLAYSPEED_PAUSE)
{
m_pInput->Pause((double)m_iCurrentPts);
m_dllAvFormat.av_read_play(m_pFormatContext);
}
m_speed = iSpeed;
AVDiscard discard = AVDISCARD_NONE;
if(m_speed > 4*DVD_PLAYSPEED_NORMAL)
discard = AVDISCARD_NONKEY;
else if(m_speed > 2*DVD_PLAYSPEED_NORMAL)
discard = AVDISCARD_BIDIR;
else if(m_speed < DVD_PLAYSPEED_PAUSE)
discard = AVDISCARD_NONKEY;
for(unsigned int i = 0; i < m_pFormatContext->nb_streams; i++)
{
if(m_pFormatContext->streams[i])
{
if(m_pFormatContext->streams[i]->discard != AVDISCARD_ALL)
m_pFormatContext->streams[i]->discard = discard;
}
}
}
double CDVDDemuxFFmpeg::ConvertTimestamp(int64_t pts, int den, int num)
{
if (pts == (int64_t)AV_NOPTS_VALUE)
return DVD_NOPTS_VALUE;
// do calculations in floats as they can easily overflow otherwise
// we don't care for having a completly exact timestamp anyway
double timestamp = (double)pts * num / den;
double starttime = 0.0f;
// for dvd's we need the original time
if(dynamic_cast<CDVDInputStream::IMenus*>(m_pInput))
starttime = dynamic_cast<CDVDInputStream::IMenus*>(m_pInput)->GetTimeStampCorrection() / DVD_TIME_BASE;
else if (m_pFormatContext->start_time != (int64_t)AV_NOPTS_VALUE)
starttime = (double)m_pFormatContext->start_time / AV_TIME_BASE;
if(timestamp > starttime)
timestamp -= starttime;
else if( timestamp + 0.1f > starttime )
timestamp = 0;
return timestamp*DVD_TIME_BASE;
}
DemuxPacket* CDVDDemuxFFmpeg::Read()
{
g_demuxer = this;
AVPacket pkt;
DemuxPacket* pPacket = NULL;
// on some cases where the received packet is invalid we will need to return an empty packet (0 length) otherwise the main loop (in CDVDPlayer)
// would consider this the end of stream and stop.
bool bReturnEmpty = false;
{ CSingleLock lock(m_critSection); // open lock scope
if (m_pFormatContext)
{
// assume we are not eof
if(m_pFormatContext->pb)
m_pFormatContext->pb->eof_reached = 0;
// keep track if ffmpeg doesn't always set these
pkt.size = 0;
pkt.data = NULL;
pkt.stream_index = MAX_STREAMS;
// timeout reads after 100ms
m_timeout.Set(20000);
int result = 0;
try
{
result = m_dllAvFormat.av_read_frame(m_pFormatContext, &pkt);
}
catch(const win32_exception &e)
{
e.writelog(__FUNCTION__);
result = AVERROR(EFAULT);
}
m_timeout.SetInfinite();
if (result == AVERROR(EINTR) || result == AVERROR(EAGAIN))
{
// timeout, probably no real error, return empty packet
bReturnEmpty = true;
}
else if (result < 0)
{
Flush();
}
else if (pkt.size < 0 || pkt.stream_index >= MAX_STREAMS)
{
// XXX, in some cases ffmpeg returns a negative packet size
if(m_pFormatContext->pb && !m_pFormatContext->pb->eof_reached)
{
CLog::Log(LOGERROR, "CDVDDemuxFFmpeg::Read() no valid packet");
bReturnEmpty = true;
Flush();
}
else
CLog::Log(LOGERROR, "CDVDDemuxFFmpeg::Read() returned invalid packet and eof reached");
m_dllAvCodec.av_free_packet(&pkt);
}
else
{
AVStream *stream = m_pFormatContext->streams[pkt.stream_index];
if (m_program != UINT_MAX)
{
/* check so packet belongs to selected program */
for (unsigned int i = 0; i < m_pFormatContext->programs[m_program]->nb_stream_indexes; i++)
{
if(pkt.stream_index == (int)m_pFormatContext->programs[m_program]->stream_index[i])
{
pPacket = CDVDDemuxUtils::AllocateDemuxPacket(pkt.size);
break;
}
}
if (!pPacket)
bReturnEmpty = true;
}
else
pPacket = CDVDDemuxUtils::AllocateDemuxPacket(pkt.size);
if (pPacket)
{
// lavf sometimes bugs out and gives 0 dts/pts instead of no dts/pts
// since this could only happens on initial frame under normal
// circomstances, let's assume it is wrong all the time
if(pkt.dts == 0)
pkt.dts = AV_NOPTS_VALUE;
if(pkt.pts == 0)
pkt.pts = AV_NOPTS_VALUE;
if(m_bMatroska && stream->codec && stream->codec->codec_type == AVMEDIA_TYPE_VIDEO)
{ // matroska can store different timestamps
// for different formats, for native stored
// stuff it is pts, but for ms compatibility
// tracks, it is really dts. sadly ffmpeg
// sets these two timestamps equal all the
// time, so we select it here instead
if(stream->codec->codec_tag == 0)
pkt.dts = AV_NOPTS_VALUE;
else
pkt.pts = AV_NOPTS_VALUE;
}
// we need to get duration slightly different for matroska embedded text subtitels
if(m_bMatroska && stream->codec->codec_id == CODEC_ID_TEXT && pkt.convergence_duration != 0)
pkt.duration = pkt.convergence_duration;
if(m_bAVI && stream->codec && stream->codec->codec_type == AVMEDIA_TYPE_VIDEO)
{
// AVI's always have borked pts, specially if m_pFormatContext->flags includes
// AVFMT_FLAG_GENPTS so always use dts
pkt.pts = AV_NOPTS_VALUE;
}
// copy contents into our own packet
pPacket->iSize = pkt.size;
// maybe we can avoid a memcpy here by detecting where pkt.destruct is pointing too?
if (pkt.data)
memcpy(pPacket->pData, pkt.data, pPacket->iSize);
pPacket->pts = ConvertTimestamp(pkt.pts, stream->time_base.den, stream->time_base.num);
pPacket->dts = ConvertTimestamp(pkt.dts, stream->time_base.den, stream->time_base.num);
pPacket->duration = DVD_SEC_TO_TIME((double)pkt.duration * stream->time_base.num / stream->time_base.den);
// used to guess streamlength
if (pPacket->dts != DVD_NOPTS_VALUE && (pPacket->dts > m_iCurrentPts || m_iCurrentPts == DVD_NOPTS_VALUE))
m_iCurrentPts = pPacket->dts;
// check if stream has passed full duration, needed for live streams
if(pkt.dts != (int64_t)AV_NOPTS_VALUE)
{
int64_t duration;
duration = pkt.dts;
if(stream->start_time != (int64_t)AV_NOPTS_VALUE)
duration -= stream->start_time;
if(duration > stream->duration)
{
stream->duration = duration;
duration = m_dllAvUtil.av_rescale_rnd(stream->duration, (int64_t)stream->time_base.num * AV_TIME_BASE, stream->time_base.den, AV_ROUND_NEAR_INF);
if ((m_pFormatContext->duration == (int64_t)AV_NOPTS_VALUE)
|| (m_pFormatContext->duration != (int64_t)AV_NOPTS_VALUE && duration > m_pFormatContext->duration))
m_pFormatContext->duration = duration;
}
}
pPacket->iStreamId = pkt.stream_index; // XXX just for now
}
m_dllAvCodec.av_free_packet(&pkt);
}
}
} // end of lock scope
if (bReturnEmpty && !pPacket)
pPacket = CDVDDemuxUtils::AllocateDemuxPacket(0);
if (!pPacket) return NULL;
// check streams, can we make this a bit more simple?
if (pPacket && pPacket->iStreamId >= 0 && pPacket->iStreamId <= MAX_STREAMS)
{
if (!m_streams[pPacket->iStreamId] ||
m_streams[pPacket->iStreamId]->pPrivate != m_pFormatContext->streams[pPacket->iStreamId] ||
m_streams[pPacket->iStreamId]->codec != m_pFormatContext->streams[pPacket->iStreamId]->codec->codec_id)
{
// content has changed, or stream did not yet exist
AddStream(pPacket->iStreamId);
}
// we already check for a valid m_streams[pPacket->iStreamId] above
else if (m_streams[pPacket->iStreamId]->type == STREAM_AUDIO)
{
if (((CDemuxStreamAudio*)m_streams[pPacket->iStreamId])->iChannels != m_pFormatContext->streams[pPacket->iStreamId]->codec->channels ||
((CDemuxStreamAudio*)m_streams[pPacket->iStreamId])->iSampleRate != m_pFormatContext->streams[pPacket->iStreamId]->codec->sample_rate)
{
// content has changed
AddStream(pPacket->iStreamId);
}
}
else if (m_streams[pPacket->iStreamId]->type == STREAM_VIDEO)
{
if (((CDemuxStreamVideo*)m_streams[pPacket->iStreamId])->iWidth != m_pFormatContext->streams[pPacket->iStreamId]->codec->width ||
((CDemuxStreamVideo*)m_streams[pPacket->iStreamId])->iHeight != m_pFormatContext->streams[pPacket->iStreamId]->codec->height)
{
// content has changed
AddStream(pPacket->iStreamId);
}
}
}
return pPacket;
}
bool CDVDDemuxFFmpeg::SeekTime(int time, bool backwords, double *startpts)
{
g_demuxer = this;
if(time < 0)
time = 0;
CDVDInputStream::ISeekTime* ist = dynamic_cast<CDVDInputStream::ISeekTime*>(m_pInput);
if (ist)
{
if (!ist->SeekTime(time))
return false;
if(startpts)
*startpts = DVD_NOPTS_VALUE;
Flush();
// also empty the internal ffmpeg buffer
m_ioContext->buf_ptr = m_ioContext->buf_end;
return true;
}
if(!m_pInput->Seek(0, SEEK_POSSIBLE)
&& !m_pInput->IsStreamType(DVDSTREAM_TYPE_FFMPEG))
{
CLog::Log(LOGDEBUG, "%s - input stream reports it is not seekable", __FUNCTION__);
return false;
}
__int64 seek_pts = (__int64)time * (AV_TIME_BASE / 1000);
if (m_pFormatContext->start_time != (int64_t)AV_NOPTS_VALUE)
seek_pts += m_pFormatContext->start_time;
int ret;
{
CSingleLock lock(m_critSection);
ret = m_dllAvFormat.av_seek_frame(m_pFormatContext, -1, seek_pts, backwords ? AVSEEK_FLAG_BACKWARD : 0);
if(ret >= 0)
UpdateCurrentPTS();
}
if(m_iCurrentPts == DVD_NOPTS_VALUE)
CLog::Log(LOGDEBUG, "%s - unknown position after seek", __FUNCTION__);
else
CLog::Log(LOGDEBUG, "%s - seek ended up on time %d", __FUNCTION__, (int)(m_iCurrentPts / DVD_TIME_BASE * 1000));
// in this case the start time is requested time
if(startpts)
*startpts = DVD_MSEC_TO_TIME(time);
// demuxer will return failure, if you seek to eof
if (m_pInput->IsEOF() && ret <= 0)
return true;
return (ret >= 0);
}
bool CDVDDemuxFFmpeg::SeekByte(__int64 pos)
{
g_demuxer = this;
CSingleLock lock(m_critSection);
int ret = m_dllAvFormat.av_seek_frame(m_pFormatContext, -1, pos, AVSEEK_FLAG_BYTE);
if(ret >= 0)
UpdateCurrentPTS();
return (ret >= 0);
}
void CDVDDemuxFFmpeg::UpdateCurrentPTS()
{
m_iCurrentPts = DVD_NOPTS_VALUE;
for(unsigned int i = 0; i < m_pFormatContext->nb_streams; i++)
{
AVStream *stream = m_pFormatContext->streams[i];
if(stream && stream->cur_dts != (int64_t)AV_NOPTS_VALUE)
{
double ts = ConvertTimestamp(stream->cur_dts, stream->time_base.den, stream->time_base.num);
if(m_iCurrentPts == DVD_NOPTS_VALUE || m_iCurrentPts > ts )
m_iCurrentPts = ts;
}
}
}
int CDVDDemuxFFmpeg::GetStreamLength()
{
if (!m_pFormatContext)
return 0;
return (int)(m_pFormatContext->duration / (AV_TIME_BASE / 1000));
}
CDemuxStream* CDVDDemuxFFmpeg::GetStream(int iStreamId)
{
if (iStreamId < 0 || iStreamId >= MAX_STREAMS) return NULL;
return m_streams[iStreamId];
}
int CDVDDemuxFFmpeg::GetNrOfStreams()
{
int i = 0;
while (i < MAX_STREAMS && m_streams[i]) i++;
return i;
}
static double SelectAspect(AVStream* st, bool* forced)
{
*forced = false;
/* if stream aspect is 1:1 or 0:0 use codec aspect */
if((st->sample_aspect_ratio.den == 1 || st->sample_aspect_ratio.den == 0)
&& (st->sample_aspect_ratio.num == 1 || st->sample_aspect_ratio.num == 0)
&& st->codec->sample_aspect_ratio.num != 0)
return av_q2d(st->codec->sample_aspect_ratio);
*forced = true;
if(st->sample_aspect_ratio.num != 0)
return av_q2d(st->sample_aspect_ratio);
return 0.0;
}
void CDVDDemuxFFmpeg::AddStream(int iId)
{
if(iId >= MAX_STREAMS)
{
CLog::Log(LOGWARNING, "%s - streams id %d exeeds maximum supported", __FUNCTION__, iId);
return;
}
AVStream* pStream = m_pFormatContext->streams[iId];
if (pStream)
{
CDemuxStream* old = m_streams[iId];
switch (pStream->codec->codec_type)
{
case AVMEDIA_TYPE_AUDIO:
{
CDemuxStreamAudioFFmpeg* st = new CDemuxStreamAudioFFmpeg(this, pStream);
m_streams[iId] = st;
st->iChannels = pStream->codec->channels;
st->iSampleRate = pStream->codec->sample_rate;
st->iBlockAlign = pStream->codec->block_align;
st->iBitRate = pStream->codec->bit_rate;
st->iBitsPerSample = pStream->codec->bits_per_coded_sample;
if(m_dllAvUtil.av_dict_get(pStream->metadata, "title", NULL, 0))
st->m_description = m_dllAvUtil.av_dict_get(pStream->metadata, "title", NULL, 0)->value;
break;
}
case AVMEDIA_TYPE_VIDEO:
{
CDemuxStreamVideoFFmpeg* st = new CDemuxStreamVideoFFmpeg(this, pStream);
m_streams[iId] = st;
if(strcmp(m_pFormatContext->iformat->name, "flv") == 0)
st->bVFR = true;
else
st->bVFR = false;
// never trust pts in avi files with h264.
if (m_bAVI && pStream->codec->codec_id == CODEC_ID_H264)
st->bPTSInvalid = true;
//average fps is more accurate for mkv files
if (m_bMatroska && pStream->avg_frame_rate.den && pStream->avg_frame_rate.num)
{
st->iFpsRate = pStream->avg_frame_rate.num;
st->iFpsScale = pStream->avg_frame_rate.den;
}
else if(pStream->r_frame_rate.den && pStream->r_frame_rate.num)
{
st->iFpsRate = pStream->r_frame_rate.num;
st->iFpsScale = pStream->r_frame_rate.den;
}
else
{
st->iFpsRate = 0;
st->iFpsScale = 0;
}
if (pStream->codec_info_nb_frames > 0
&& pStream->codec_info_nb_frames <= 2
&& m_pInput->IsStreamType(DVDSTREAM_TYPE_DVD))
{