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DVDDemuxFFmpeg.cpp
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DVDDemuxFFmpeg.cpp
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/*
* Copyright (C) 2005-2013 Team XBMC
* http://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, see
* <http://www.gnu.org/licenses/>.
*
*/
#include "DVDDemuxFFmpeg.h"
#include <utility>
#include "commons/Exception.h"
#include "cores/FFmpeg.h"
#include "DVDClock.h" // for DVD_TIME_BASE
#include "DVDDemuxUtils.h"
#include "DVDInputStreams/DVDInputStream.h"
#include "DVDInputStreams/DVDInputStreamFFmpeg.h"
#include "filesystem/CurlFile.h"
#include "filesystem/Directory.h"
#include "filesystem/File.h"
#include "settings/AdvancedSettings.h"
#include "settings/Settings.h"
#include "system.h"
#include "threads/SystemClock.h"
#include "URL.h"
#include "utils/log.h"
#include "utils/StringUtils.h"
#ifdef HAVE_LIBBLURAY
#include "DVDInputStreams/DVDInputStreamBluray.h"
#endif
#ifndef __STDC_CONSTANT_MACROS
#define __STDC_CONSTANT_MACROS
#endif
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS
#endif
#ifdef TARGET_POSIX
#include "stdint.h"
#endif
extern "C" {
#include "libavutil/opt.h"
}
struct StereoModeConversionMap
{
const char* name;
const char* mode;
};
// we internally use the matroska string representation of stereoscopic modes.
// This struct is a conversion map to convert stereoscopic mode values
// from asf/wmv to the internally used matroska ones
static const struct StereoModeConversionMap WmvToInternalStereoModeMap[] =
{
{ "SideBySideRF", "right_left" },
{ "SideBySideLF", "left_right" },
{ "OverUnderRT", "bottom_top" },
{ "OverUnderLT", "top_bottom" },
{}
};
#define FF_MAX_EXTRADATA_SIZE ((1 << 28) - FF_INPUT_BUFFER_PADDING_SIZE)
void CDemuxStreamAudioFFmpeg::GetStreamInfo(std::string& strInfo)
{
if(!m_stream) return;
char temp[128];
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];
avcodec_string(temp, 128, m_stream->codec, 0);
strInfo = temp;
}
void CDemuxStreamSubtitleFFmpeg::GetStreamInfo(std::string& strInfo)
{
if(!m_stream) return;
char temp[128];
avcodec_string(temp, 128, m_stream->codec, 0);
strInfo = temp;
}
static int interrupt_cb(void* ctx)
{
CDVDDemuxFFmpeg* demuxer = static_cast<CDVDDemuxFFmpeg*>(ctx);
if(demuxer && 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(h))
return AVERROR_EXIT;
CDVDInputStream* pInputStream = static_cast<CDVDDemuxFFmpeg*>(h)->m_pInput;
return pInputStream->Read(buf, size);
}
/*
static int dvd_file_write(URLContext *h, uint8_t* buf, int size)
{
return -1;
}
*/
static int64_t dvd_file_seek(void *h, int64_t pos, int whence)
{
if(interrupt_cb(h))
return AVERROR_EXIT;
CDVDInputStream* pInputStream = static_cast<CDVDDemuxFFmpeg*>(h)->m_pInput;
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;
m_currentPts = DVD_NOPTS_VALUE;
m_bMatroska = false;
m_bAVI = false;
m_bSSIF = false;
m_speed = DVD_PLAYSPEED_NORMAL;
m_program = UINT_MAX;
m_pkt.result = -1;
memset(&m_pkt.pkt, 0, sizeof(AVPacket));
m_streaminfo = true; /* set to true if we want to look for streams before playback */
m_checkvideo = false;
}
CDVDDemuxFFmpeg::~CDVDDemuxFFmpeg()
{
Dispose();
ff_flush_avutil_log_buffers();
}
bool CDVDDemuxFFmpeg::Aborted()
{
if(m_timeout.IsTimePast())
return true;
CDVDInputStreamFFmpeg * input = dynamic_cast<CDVDInputStreamFFmpeg*>(m_pInput);
if(input && input->Aborted())
return true;
return false;
}
bool CDVDDemuxFFmpeg::Open(CDVDInputStream* pInput, bool streaminfo, bool fileinfo)
{
AVInputFormat* iformat = NULL;
std::string strFile;
m_streaminfo = streaminfo;
m_currentPts = DVD_NOPTS_VALUE;
m_speed = DVD_PLAYSPEED_NORMAL;
m_program = UINT_MAX;
const AVIOInterruptCB int_cb = { interrupt_cb, this };
if (!pInput) return false;
m_pInput = pInput;
strFile = m_pInput->GetFileName();
if( m_pInput->GetContent().length() > 0 )
{
std::string content = m_pInput->GetContent();
StringUtils::ToLower(content);
/* check if we can get a hint from content */
if ( content.compare("video/x-vobsub") == 0 )
iformat = av_find_input_format("mpeg");
else if( content.compare("video/x-dvd-mpeg") == 0 )
iformat = av_find_input_format("mpeg");
else if( content.compare("video/mp2t") == 0 )
iformat = av_find_input_format("mpegts");
else if( content.compare("multipart/x-mixed-replace") == 0 )
iformat = av_find_input_format("mjpeg");
}
// open the demuxer
m_pFormatContext = avformat_alloc_context();
m_pFormatContext->interrupt_callback = int_cb;
// 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
CURL url = m_pInput->GetURL();
AVDictionary *options = GetFFMpegOptionsFromURL(url);
int result=-1;
if (url.IsProtocol("mms"))
{
// try mmsh, then mmst
url.SetProtocol("mmsh");
url.SetProtocolOptions("");
result = avformat_open_input(&m_pFormatContext, url.Get().c_str(), iformat, &options);
if (result < 0)
{
url.SetProtocol("mmst");
strFile = url.Get();
}
}
if (result < 0 && avformat_open_input(&m_pFormatContext, strFile.c_str(), iformat, &options) < 0 )
{
CLog::Log(LOGDEBUG, "Error, could not open file %s", CURL::GetRedacted(strFile).c_str());
Dispose();
av_dict_free(&options);
return false;
}
av_dict_free(&options);
}
else
{
unsigned char* buffer = (unsigned char*)av_malloc(FFMPEG_FILE_BUFFER_SIZE);
m_ioContext = avio_alloc_context(buffer, FFMPEG_FILE_BUFFER_SIZE, 0, this, 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;
std::string content = m_pInput->GetContent();
StringUtils::ToLower(content);
if (StringUtils::StartsWith(content, "audio/l16"))
iformat = av_find_input_format("s16be");
if( iformat == NULL )
{
// let ffmpeg decide which demuxer we have to open
bool trySPDIFonly = (m_pInput->GetContent() == "audio/x-spdif-compressed");
if (!trySPDIFonly)
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;
uint8_t probe_buffer[FFMPEG_FILE_BUFFER_SIZE + AVPROBE_PADDING_SIZE];
// init probe data
pd.buf = probe_buffer;
pd.filename = strFile.c_str();
// av_probe_input_buffer might have changed the buffer_size beyond our allocated amount
int buffer_size = std::min((int) FFMPEG_FILE_BUFFER_SIZE, m_ioContext->buffer_size);
// read data using avformat's buffers
pd.buf_size = avio_read(m_ioContext, pd.buf, m_ioContext->max_packet_size ? m_ioContext->max_packet_size : buffer_size);
if (pd.buf_size <= 0)
{
CLog::Log(LOGERROR, "%s - error reading from input stream, %s", __FUNCTION__, CURL::GetRedacted(strFile).c_str());
return false;
}
memset(pd.buf+pd.buf_size, 0, AVPROBE_PADDING_SIZE);
// restore position again
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_VideoPlayerIgnoreDTSinWAV))
{
// 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 = 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 = 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 = av_find_input_format("aac");
else if( content.compare("audio/aac") == 0 )
iformat = av_find_input_format("aac");
else if( content.compare("video/flv") == 0 )
iformat = av_find_input_format("flv");
else if( content.compare("video/x-flv") == 0 )
iformat = av_find_input_format("flv");
}
if (!iformat)
{
CLog::Log(LOGERROR, "%s - error probing input format, %s", __FUNCTION__, CURL::GetRedacted(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__);
}
}
m_pFormatContext->pb = m_ioContext;
AVDictionary *options = NULL;
if (iformat->name && (strcmp(iformat->name, "mp3") == 0 || strcmp(iformat->name, "mp2") == 0))
{
CLog::Log(LOGDEBUG, "%s - setting usetoc to 0 for accurate VBR MP3 seek", __FUNCTION__);
av_dict_set(&options, "usetoc", "0", 0);
}
if (StringUtils::StartsWith(content, "audio/l16"))
{
int channels = 2;
int samplerate = 44100;
GetL16Parameters(channels, samplerate);
av_dict_set_int(&options, "channels", channels, 0);
av_dict_set_int(&options, "sample_rate", samplerate, 0);
}
if (avformat_open_input(&m_pFormatContext, strFile.c_str(), iformat, &options) < 0)
{
CLog::Log(LOGERROR, "%s - Error, could not open file %s", __FUNCTION__, CURL::GetRedacted(strFile).c_str());
Dispose();
av_dict_free(&options);
return false;
}
av_dict_free(&options);
}
// Avoid detecting framerate if advancedsettings.xml says so
if (g_advancedSettings.m_videoFpsDetect == 0)
m_pFormatContext->fps_probe_size = 0;
// analyse very short to speed up mjpeg playback start
if (iformat && (strcmp(iformat->name, "mjpeg") == 0) && m_ioContext->seekable == 0)
av_opt_set_int(m_pFormatContext, "analyzeduration", 500000, 0);
bool skipCreateStreams = false;
bool isBluray = pInput->IsStreamType(DVDSTREAM_TYPE_BLURAY);
if (iformat && (strcmp(iformat->name, "mpegts") == 0) && !fileinfo && !isBluray)
{
av_opt_set_int(m_pFormatContext, "analyzeduration", 500000, 0);
m_checkvideo = true;
skipCreateStreams = true;
}
else if (!iformat || (strcmp(iformat->name, "mpegts") != 0))
{
m_streaminfo = true;
}
// 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 (m_streaminfo)
{
for (unsigned int i = 0; i < m_pFormatContext->nb_streams; i++)
{
AVStream *st = m_pFormatContext->streams[i];
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->codec->codec_id == AV_CODEC_ID_DTS)
{
AVCodec* pCodec = avcodec_find_decoder_by_name("libdcadec");
if (pCodec)
st->codec->codec = pCodec;
}
}
/* to speed up dvd switches, only analyse very short */
if(m_pInput->IsStreamType(DVDSTREAM_TYPE_DVD))
av_opt_set_int(m_pFormatContext, "analyzeduration", 500000, 0);
CLog::Log(LOGDEBUG, "%s - avformat_find_stream_info starting", __FUNCTION__);
int iErr = avformat_find_stream_info(m_pFormatContext, NULL);
if (iErr < 0)
{
CLog::Log(LOGWARNING,"could not find codec parameters for %s", CURL::GetRedacted(strFile).c_str());
if (m_pInput->IsStreamType(DVDSTREAM_TYPE_DVD)
|| m_pInput->IsStreamType(DVDSTREAM_TYPE_BLURAY)
|| (m_pFormatContext->nb_streams == 1 && m_pFormatContext->streams[0]->codec->codec_id == AV_CODEC_ID_AC3)
|| m_checkvideo)
{
// special case, our codecs can still handle it.
}
else
{
Dispose();
return false;
}
}
CLog::Log(LOGDEBUG, "%s - av_find_stream_info finished", __FUNCTION__);
if (m_checkvideo)
{
// make sure we start video with an i-frame
ResetVideoStreams();
}
}
else
{
m_program = 0;
m_checkvideo = true;
skipCreateStreams = true;
}
// 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
av_dump_format(m_pFormatContext, 0, strFile.c_str(), 0);
UpdateCurrentPTS();
// in case of mpegts and we have not seen pat/pmt, defer creation of streams
if (!skipCreateStreams || m_pFormatContext->nb_programs > 0)
CreateStreams();
// allow IsProgramChange to return true
if (skipCreateStreams && GetNrOfStreams() == 0)
m_program = 0;
return true;
}
void CDVDDemuxFFmpeg::Dispose()
{
m_pkt.result = -1;
av_free_packet(&m_pkt.pkt);
while (!m_SSIFqueue.empty())
{
CDVDDemuxUtils::FreeDemuxPacket(m_SSIFqueue.front());
m_SSIFqueue.pop();
}
if (m_pFormatContext)
{
for (unsigned int i = 0; i < m_pFormatContext->nb_streams; i++)
{
avcodec_close(m_pFormatContext->streams[i]->codec);
}
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;
}
avformat_close_input(&m_pFormatContext);
}
if(m_ioContext)
{
av_free(m_ioContext->buffer);
av_free(m_ioContext);
}
m_ioContext = NULL;
m_pFormatContext = NULL;
m_speed = DVD_PLAYSPEED_NORMAL;
DisposeStreams();
m_pInput = NULL;
}
void CDVDDemuxFFmpeg::Reset()
{
CDVDInputStream* pInputStream = m_pInput;
Dispose();
Open(pInputStream, m_streaminfo);
}
void CDVDDemuxFFmpeg::Flush()
{
// naughty usage of an internal ffmpeg function
if (m_pFormatContext)
avformat_flush(m_pFormatContext);
m_currentPts = DVD_NOPTS_VALUE;
m_pkt.result = -1;
av_free_packet(&m_pkt.pkt);
while (!m_SSIFqueue.empty())
{
CDVDDemuxUtils::FreeDemuxPacket(m_SSIFqueue.front());
m_SSIFqueue.pop();
}
}
void CDVDDemuxFFmpeg::Abort()
{
m_timeout.SetExpired();
}
void CDVDDemuxFFmpeg::SetSpeed(int iSpeed)
{
if(!m_pFormatContext)
return;
if(m_speed != DVD_PLAYSPEED_PAUSE && iSpeed == DVD_PLAYSPEED_PAUSE)
{
m_pInput->Pause(m_currentPts);
av_read_pause(m_pFormatContext);
}
else if(m_speed == DVD_PLAYSPEED_PAUSE && iSpeed != DVD_PLAYSPEED_PAUSE)
{
m_pInput->Pause(m_currentPts);
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;
}
}
}
AVDictionary *CDVDDemuxFFmpeg::GetFFMpegOptionsFromURL(const CURL &url)
{
AVDictionary *options = NULL;
if (url.IsProtocol("http") || url.IsProtocol("https"))
{
std::map<std::string, std::string> protocolOptions;
url.GetProtocolOptions(protocolOptions);
std::string headers;
bool hasUserAgent = false;
for(std::map<std::string, std::string>::const_iterator it = protocolOptions.begin(); it != protocolOptions.end(); ++it)
{
std::string name = it->first; StringUtils::ToLower(name);
const std::string &value = it->second;
if (name == "seekable")
av_dict_set(&options, "seekable", value.c_str(), 0);
else if (name == "user-agent")
{
av_dict_set(&options, "user-agent", value.c_str(), 0);
hasUserAgent = true;
}
else if (name != "auth" && name != "encoding")
// all other protocol options can be added as http header.
headers.append(it->first).append(": ").append(value).append("\r\n");
}
if (!hasUserAgent)
// set default xbmc user-agent.
av_dict_set(&options, "user-agent", g_advancedSettings.m_userAgent.c_str(), 0);
if (!headers.empty())
av_dict_set(&options, "headers", headers.c_str(), 0);
std::string cookies;
if (XFILE::CCurlFile::GetCookies(url, cookies))
av_dict_set(&options, "cookies", cookies.c_str(), 0);
}
return options;
}
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(CDVDInputStream::IMenus* menu = dynamic_cast<CDVDInputStream::IMenus*>(m_pInput))
starttime = menu->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;
// allow for largest possible difference in pts and dts for a single packet
else if( timestamp + 0.5f > starttime )
timestamp = 0;
return timestamp*DVD_TIME_BASE;
}
DemuxPacket* CDVDDemuxFFmpeg::Read()
{
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 CVideoPlayer)
// 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;
// check for saved packet after a program change
if (m_pkt.result < 0)
{
// keep track if ffmpeg doesn't always set these
m_pkt.pkt.size = 0;
m_pkt.pkt.data = NULL;
// timeout reads after 100ms
m_timeout.Set(20000);
m_pkt.result = av_read_frame(m_pFormatContext, &m_pkt.pkt);
m_timeout.SetInfinite();
}
if (m_pkt.result == AVERROR(EINTR) || m_pkt.result == AVERROR(EAGAIN))
{
// timeout, probably no real error, return empty packet
bReturnEmpty = true;
}
else if (m_pkt.result < 0)
{
Flush();
}
// libavformat is confused by the interleaved SSIF.
// Disable program management for those
else if (!m_bSSIF && IsProgramChange())
{
// update streams
CreateStreams(m_program);
pPacket = CDVDDemuxUtils::AllocateDemuxPacket(0);
pPacket->iStreamId = DMX_SPECIALID_STREAMCHANGE;
return pPacket;
}
// check size and stream index for being in a valid range
else if (m_pkt.pkt.size < 0 ||
m_pkt.pkt.stream_index < 0 ||
m_pkt.pkt.stream_index >= (int)m_pFormatContext->nb_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_pkt.result = -1;
av_free_packet(&m_pkt.pkt);
while (!m_SSIFqueue.empty())
{
CDVDDemuxUtils::FreeDemuxPacket(m_SSIFqueue.front());
m_SSIFqueue.pop();
}
}
else
{
ParsePacket(&m_pkt.pkt);
AVStream *stream = m_pFormatContext->streams[m_pkt.pkt.stream_index];
if (IsVideoReady())
{
// libavformat is confused by the interleaved SSIF.
// Disable program management for those
if ( !m_bSSIF && 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(m_pkt.pkt.stream_index == (int)m_pFormatContext->programs[m_program]->stream_index[i])
{
pPacket = CDVDDemuxUtils::AllocateDemuxPacket(m_pkt.pkt.size);
break;
}
}
if (!pPacket)
bReturnEmpty = true;
}
else
pPacket = CDVDDemuxUtils::AllocateDemuxPacket(m_pkt.pkt.size);
}
else
bReturnEmpty = true;
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(m_pkt.pkt.dts == 0)
m_pkt.pkt.dts = AV_NOPTS_VALUE;
if(m_pkt.pkt.pts == 0)
m_pkt.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)
m_pkt.pkt.dts = AV_NOPTS_VALUE;
else
m_pkt.pkt.pts = AV_NOPTS_VALUE;
}
// we need to get duration slightly different for matroska embedded text subtitels
if(m_bMatroska && stream->codec && stream->codec->codec_id == AV_CODEC_ID_TEXT && m_pkt.pkt.convergence_duration != 0)
m_pkt.pkt.duration = m_pkt.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
m_pkt.pkt.pts = AV_NOPTS_VALUE;
}
// copy contents into our own packet
pPacket->iSize = m_pkt.pkt.size;
// maybe we can avoid a memcpy here by detecting where pkt.destruct is pointing too?
if (m_pkt.pkt.data)
memcpy(pPacket->pData, m_pkt.pkt.data, pPacket->iSize);
pPacket->pts = ConvertTimestamp(m_pkt.pkt.pts, stream->time_base.den, stream->time_base.num);
pPacket->dts = ConvertTimestamp(m_pkt.pkt.dts, stream->time_base.den, stream->time_base.num);
pPacket->duration = DVD_SEC_TO_TIME((double)m_pkt.pkt.duration * stream->time_base.num / stream->time_base.den);
// used to guess streamlength
if (pPacket->dts != DVD_NOPTS_VALUE && (pPacket->dts > m_currentPts || m_currentPts == DVD_NOPTS_VALUE))
m_currentPts = pPacket->dts;
// check if stream has passed full duration, needed for live streams
bool bAllowDurationExt = (stream->codec && (stream->codec->codec_type == AVMEDIA_TYPE_VIDEO || stream->codec->codec_type == AVMEDIA_TYPE_AUDIO));
if(bAllowDurationExt && m_pkt.pkt.dts != (int64_t)AV_NOPTS_VALUE)
{
int64_t duration;
duration = m_pkt.pkt.dts;
if(stream->start_time != (int64_t)AV_NOPTS_VALUE)
duration -= stream->start_time;
if(duration > stream->duration)
{
stream->duration = duration;
duration = 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;
}
}
// store internal id until we know the continuous id presented to player
// the stream might not have been created yet
pPacket->iStreamId = m_pkt.pkt.stream_index;
}
m_pkt.result = -1;
av_free_packet(&m_pkt.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)
{
CDemuxStream *stream = GetStreamInternal(pPacket->iStreamId);
if (!stream ||
stream->pPrivate != m_pFormatContext->streams[pPacket->iStreamId] ||
stream->codec != m_pFormatContext->streams[pPacket->iStreamId]->codec->codec_id)
{
// content has changed, or stream did not yet exist
stream = AddStream(pPacket->iStreamId);
}
// we already check for a valid m_streams[pPacket->iStreamId] above
else if (stream->type == STREAM_AUDIO)
{
if (((CDemuxStreamAudio*)stream)->iChannels != m_pFormatContext->streams[pPacket->iStreamId]->codec->channels ||
((CDemuxStreamAudio*)stream)->iSampleRate != m_pFormatContext->streams[pPacket->iStreamId]->codec->sample_rate)
{
// content has changed
stream = AddStream(pPacket->iStreamId);
}
}
else if (stream->type == STREAM_VIDEO)
{
if (((CDemuxStreamVideo*)stream)->iWidth != m_pFormatContext->streams[pPacket->iStreamId]->codec->width ||
((CDemuxStreamVideo*)stream)->iHeight != m_pFormatContext->streams[pPacket->iStreamId]->codec->height)
{
// content has changed
stream = AddStream(pPacket->iStreamId);
}
if (m_bSSIF && stream->iPhysicalId == 0x1011)
{
// Here, we recreate a h264 MVC packet from the base one + buffered MVC NALU's
if (m_SSIFqueue.size() <= 0)
{
CDVDDemuxUtils::FreeDemuxPacket(pPacket);
pPacket = CDVDDemuxUtils::AllocateDemuxPacket(0);
pPacket->iSize = 0;
}
else
{
DemuxPacket* mvcpkt = m_SSIFqueue.front();
double tsA = (pPacket->dts != AV_NOPTS_VALUE ? pPacket->dts : pPacket->pts);
double tsB = (mvcpkt->dts != AV_NOPTS_VALUE ? mvcpkt->dts : mvcpkt->pts);
while (tsB < tsA)
{
m_SSIFqueue.pop();
if (m_SSIFqueue.empty())
{
tsB = AV_NOPTS_VALUE;
break;
}
CDVDDemuxUtils::FreeDemuxPacket(mvcpkt);
mvcpkt = m_SSIFqueue.front();
CDVDDemuxUtils::FreeDemuxPacket(mvcpkt);
tsB = (mvcpkt->dts != AV_NOPTS_VALUE ? mvcpkt->dts : mvcpkt->pts);
}
if (tsA == tsB)
{
m_SSIFqueue.pop();
DemuxPacket* newpkt = CDVDDemuxUtils::AllocateDemuxPacket(pPacket->iSize + mvcpkt->iSize);
newpkt->pts = pPacket->pts;
newpkt->dts = pPacket->dts;
newpkt->duration = pPacket->duration;
newpkt->iGroupId = pPacket->iGroupId;
newpkt->iStreamId = pPacket->iStreamId;
newpkt->iSize = pPacket->iSize + mvcpkt->iSize;
memcpy(newpkt->pData, pPacket->pData, pPacket->iSize);
memcpy(newpkt->pData + pPacket->iSize, mvcpkt->pData, mvcpkt->iSize);
//CLog::Log(LOGDEBUG, ">>> MVC merged packet: %d+%d, pts(%f/%f) dts (%f/%f)", pPacket->iSize, mvcpkt->iSize, pPacket->pts, mvcpkt->pts, pPacket->dts, mvcpkt->dts);
CDVDDemuxUtils::FreeDemuxPacket(pPacket);
CDVDDemuxUtils::FreeDemuxPacket(mvcpkt);
pPacket = newpkt;
}
else
{
//CLog::Log(LOGERROR, "!!! MVC error: missing mvc packet: pts(%f) dts(%f) - %lld", pPacket->pts, pPacket->dts, m_pkt.pkt.pts);
// Ignore packets without MVC part; solves seeking
CDVDDemuxUtils::FreeDemuxPacket(pPacket);
pPacket = CDVDDemuxUtils::AllocateDemuxPacket(0);
pPacket->iSize = 0;
}
}
}
}
else if (stream->type == STREAM_DATA)
{
if (m_bSSIF && stream->iPhysicalId == 0x1012)
{
// Buffer the MVC NALU's for later merging with the base h264 packet
// This works because the MVC stream is guaranteed to come first
DemuxPacket* newpkt = CDVDDemuxUtils::AllocateDemuxPacket(pPacket->iSize);
newpkt->iSize = pPacket->iSize;
newpkt->pts = pPacket->pts;
newpkt->dts = pPacket->dts;
newpkt->duration = pPacket->duration;
newpkt->iGroupId = pPacket->iGroupId;
newpkt->iStreamId = pPacket->iStreamId;
memcpy(newpkt->pData, pPacket->pData, newpkt->iSize);
m_SSIFqueue.push(newpkt);
CDVDDemuxUtils::FreeDemuxPacket(pPacket);
pPacket = CDVDDemuxUtils::AllocateDemuxPacket(0);
pPacket->iSize = 0;
}
}
if (!stream)
{
CLog::Log(LOGERROR, "CDVDDemuxFFmpeg::AddStream - internal error, stream is null");
CDVDDemuxUtils::FreeDemuxPacket(pPacket);
return NULL;
}
// set continuous stream id for player
pPacket->iStreamId = stream->iId;
}
return pPacket;
}
bool CDVDDemuxFFmpeg::SeekTime(int time, bool backwords, double *startpts)
{
if (!m_pInput)
return false;
if(time < 0)
time = 0;
m_pkt.result = -1;
av_free_packet(&m_pkt.pkt);