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AVDemuxer.cpp
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AVDemuxer.cpp
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/******************************************************************************
QtAV: Multimedia framework based on Qt and FFmpeg
Copyright (C) 2012-2022 Wang Bin <[email protected]>
* This file is part of QtAV
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
******************************************************************************/
#include "QtAV/AVDemuxer.h"
#include "QtAV/MediaIO.h"
#include "QtAV/private/AVCompat.h"
#include <QtCore/QMutex>
#include <QtCore/QStringList>
#include <QtCore/QIODevice>
#if QT_VERSION >= QT_VERSION_CHECK(4, 7, 0)
#include <QtCore/QElapsedTimer>
#else
#include <QtCore/QTime>
typedef QTime QElapsedTimer;
#endif
#include "utils/internal.h"
#include "utils/Logger.h"
namespace QtAV {
static const char kFileScheme[] = "file:";
class AVDemuxer::InterruptHandler : public AVIOInterruptCB
{
public:
enum Action {
Unknown = -1,
Open,
FindStreamInfo,
Read
};
//default network timeout: 30000
InterruptHandler(AVDemuxer* demuxer, int timeout = 30000)
: mStatus(0)
, mTimeout(timeout)
, mTimeoutAbort(true)
, mEmitError(true)
//, mLastTime(0)
, mAction(Unknown)
, mpDemuxer(demuxer)
{
callback = handleTimeout;
opaque = this;
}
~InterruptHandler() {
#if QT_VERSION >= QT_VERSION_CHECK(4, 7, 0)
mTimer.invalidate();
#else
mTimer.stop();
#endif
}
void begin(Action act) {
if (mStatus > 0)
mStatus = 0;
mEmitError = true;
mAction = act;
mTimer.start();
}
void end() {
#if QT_VERSION >= QT_VERSION_CHECK(4, 7, 0)
mTimer.invalidate();
#else
mTimer.stop();
#endif
switch (mAction) {
case Read:
//mpDemuxer->setMediaStatus(BufferedMedia);
break;
default:
break;
}
mAction = Unknown;
}
qint64 getTimeout() const { return mTimeout; }
void setTimeout(qint64 timeout) { mTimeout = timeout; }
bool setInterruptOnTimeout(bool value) {
if (mTimeoutAbort == value)
return false;
mTimeoutAbort = value;
if (mTimeoutAbort) {
mEmitError = true;
}
return true;
}
bool isInterruptOnTimeout() const {return mTimeoutAbort;}
int getStatus() const { return mStatus; }
void setStatus(int status) { mStatus = status; }
/*
* metodo per interruzione loop ffmpeg
* @param void*obj: classe attuale
* @return
* >0 Interruzione loop di ffmpeg!
*/
static int handleTimeout(void* obj) {
InterruptHandler* handler = static_cast<InterruptHandler*>(obj);
if (!handler) {
qWarning("InterruptHandler is null");
return -1;
}
//check manual interruption
if (handler->getStatus() < 0) {
qDebug("User Interrupt: -> quit!");
// DO NOT call setMediaStatus() here.
/* MUST make sure blocking functions (open, read) return before we change the status
* because demuxer may be closed in another thread at the same time if status is not LoadingMedia
* use handleError() after blocking functions return is good
*/
// 1: blocking operation will be aborted.
return 1;//interrupt
}
// qApp->processEvents(); //FIXME: qml crash
switch (handler->mAction) {
case Unknown: //callback is not called between begin()/end()
//qWarning("Unknown timeout action");
break;
case Open:
case FindStreamInfo:
//qDebug("set loading media for %d from: %d", handler->mAction, handler->mpDemuxer->mediaStatus());
handler->mpDemuxer->setMediaStatus(LoadingMedia);
break;
case Read:
//handler->mpDemuxer->setMediaStatus(BufferingMedia);
default:
break;
}
if (handler->mTimeout < 0)
return 0;
if (!handler->mTimer.isValid()) {
//qDebug("timer is not valid, start it");
handler->mTimer.start();
//handler->mLastTime = handler->mTimer.elapsed();
return 0;
}
//use restart
#if QT_VERSION >= QT_VERSION_CHECK(4, 7, 0)
if (!handler->mTimer.hasExpired(handler->mTimeout))
#else
if (handler->mTimer.elapsed() < handler->mTimeout)
#endif
return 0;
qDebug("status: %d, Timeout expired: %lld/%lld -> quit!", (int)handler->mStatus, handler->mTimer.elapsed(), handler->mTimeout);
handler->mTimer.invalidate();
if (handler->mStatus == 0) {
AVError::ErrorCode ec(AVError::ReadTimedout);
if (handler->mAction == Open) {
ec = AVError::OpenTimedout;
} else if (handler->mAction == FindStreamInfo) {
ec = AVError::ParseStreamTimedOut;
} else if (handler->mAction == Read) {
ec = AVError::ReadTimedout;
}
handler->mStatus = (int)ec;
// maybe changed in other threads
//handler->mStatus.testAndSetAcquire(0, ec);
}
if (handler->mTimeoutAbort)
return 1;
// emit demuxer error, handleerror
if (handler->mEmitError) {
handler->mEmitError = false;
AVError::ErrorCode ec = AVError::ErrorCode(handler->mStatus); //FIXME: maybe changed in other threads
QString es;
handler->mpDemuxer->handleError(AVERROR_EXIT, &ec, es);
}
return 0;
}
private:
int mStatus;
qint64 mTimeout;
bool mTimeoutAbort;
bool mEmitError;
//qint64 mLastTime;
Action mAction;
AVDemuxer *mpDemuxer;
QElapsedTimer mTimer;
};
class AVDemuxer::Private
{
public:
Private()
: media_status(NoMedia)
, seekable(false)
, network(false)
, has_attached_pic(false)
, started(false)
, max_pts(0.0)
, eof(false)
, media_changed(true)
, buf_pos(0)
, stream(-1)
, format_ctx(0)
, input_format(0)
, input(0)
, seek_unit(SeekByTime)
, seek_type(AccurateSeek)
, dict(0)
, interrupt_hanlder(0)
{}
~Private() {
delete interrupt_hanlder;
if (dict) {
av_dict_free(&dict);
dict = 0;
}
if (input) {
delete input;
input = 0;
}
}
void applyOptionsForDict();
void applyOptionsForContext();
void resetStreams() {
stream = -1;
if (media_changed)
astream = vstream = sstream = StreamInfo();
else
astream.avctx = vstream.avctx = sstream.avctx = 0;
audio_streams.clear();
video_streams.clear();
subtitle_streams.clear();
}
void checkNetwork() {
// FIXME: is there a good way to check network? now use URLContext.flags == URL_PROTOCOL_FLAG_NETWORK
// not network: concat cache pipe avdevice crypto?
if (!file.isEmpty()
&& file.contains(QLatin1String(":"))
&& (file.startsWith(QLatin1String("http")) //http, https, httpproxy
|| file.startsWith(QLatin1String("rtmp")) //rtmp{,e,s,te,ts}
|| file.startsWith(QLatin1String("mms")) //mms{,h,t}
|| file.startsWith(QLatin1String("ffrtmp")) //ffrtmpcrypt, ffrtmphttp
|| file.startsWith(QLatin1String("rtp:"))
|| file.startsWith(QLatin1String("rtsp:"))
|| file.startsWith(QLatin1String("sctp:"))
|| file.startsWith(QLatin1String("tcp:"))
|| file.startsWith(QLatin1String("tls:"))
|| file.startsWith(QLatin1String("udp:"))
|| file.startsWith(QLatin1String("gopher:"))
)) {
network = true;
}
}
bool checkSeekable() {
bool s = false;
if (!format_ctx)
return s;
// io.seekable: byte seeking
if (input)
s |= input->isSeekable();
if (format_ctx->pb)
s |= !!format_ctx->pb->seekable;
// format.read_seek: time seeking. For example, seeking on hls stream steps: find segment, read packet in segment and drop until desired pts got
s |= format_ctx->iformat->read_seek || format_ctx->iformat->read_seek2;
return s;
}
// set wanted_xx_stream. call openCodecs() to read new stream frames
// stream < 0 is choose best
bool setStream(AVDemuxer::StreamType st, int streamValue);
//called by loadFile(). if change to a new stream, call it(e.g. in AVPlayer)
bool prepareStreams();
MediaStatus media_status;
bool seekable;
bool network;
bool has_attached_pic;
bool started;
qreal max_pts; // max pts read
bool eof;
bool media_changed;
mutable qptrdiff buf_pos; // detect eof for dynamic size (growing) stream even if detectDynamicStreamInterval() is not set
Packet pkt;
int stream;
QList<int> audio_streams, video_streams, subtitle_streams;
AVFormatContext *format_ctx;
//copy the info, not parse the file when constructed, then need member vars
QString file;
QString file_orig;
AVInputFormat *input_format;
QString format_forced;
MediaIO *input;
SeekUnit seek_unit;
SeekType seek_type;
AVDictionary *dict;
QVariantHash options;
typedef struct StreamInfo {
StreamInfo()
: stream(-1)
, wanted_stream(-1)
, index(-1)
, wanted_index(-1)
, avctx(0)
{}
// wanted_stream is REQUIRED. e.g. always set -1 to indicate the default stream, -2 to disable
int stream, wanted_stream; // -1 default, selected by ff
int index, wanted_index; // index in a kind of streams
AVCodecContext *avctx;
} StreamInfo;
StreamInfo astream, vstream, sstream;
AVDemuxer::InterruptHandler *interrupt_hanlder;
QMutex mutex; //TODO: remove if load, read, seek is called in 1 thread
};
AVDemuxer::AVDemuxer(QObject *parent)
: QObject(parent)
, d(new Private())
{
// TODO: xxx_register_all already use static var
class AVInitializer {
public:
AVInitializer() {
#if !AVCODEC_STATIC_REGISTER
avcodec_register_all();
#endif
#if QTAV_HAVE(AVDEVICE)
avdevice_register_all();
#endif
#if !AVFORMAT_STATIC_REGISTER
av_register_all();
#endif
avformat_network_init();
}
~AVInitializer() {
avformat_network_deinit();
}
};
static AVInitializer sAVInit;
Q_UNUSED(sAVInit);
d->interrupt_hanlder = new InterruptHandler(this);
}
AVDemuxer::~AVDemuxer()
{
unload();
}
static void getFFmpegInputFormats(QStringList* formats, QStringList* extensions)
{
static QStringList exts;
static QStringList fmts;
if (exts.isEmpty() && fmts.isEmpty()) {
QStringList e, f;
#if AVFORMAT_STATIC_REGISTER
const AVInputFormat *i = NULL;
void* it = NULL;
while ((i = av_demuxer_iterate(&it))) {
#else
AVInputFormat *i = NULL;
av_register_all(); // MUST register all input/output formats
while ((i = av_iformat_next(i))) {
#endif
#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
if (i->extensions)
e << QString::fromLatin1(i->extensions).split(QLatin1Char(','), Qt::SkipEmptyParts);
if (i->name)
f << QString::fromLatin1(i->name).split(QLatin1Char(','), Qt::SkipEmptyParts);
#else
if (i->extensions)
e << QString::fromLatin1(i->extensions).split(QLatin1Char(','), QString::SkipEmptyParts);
if (i->name)
f << QString::fromLatin1(i->name).split(QLatin1Char(','), QString::SkipEmptyParts);
#endif
}
foreach (const QString& v, e) {
exts.append(v.trimmed());
}
foreach (const QString& v, f) {
fmts.append(v.trimmed());
}
exts.removeDuplicates();
fmts.removeDuplicates();
}
if (formats)
*formats = fmts;
if (extensions)
*extensions = exts;
}
const QStringList& AVDemuxer::supportedFormats()
{
static QStringList fmts;
if (fmts.isEmpty())
getFFmpegInputFormats(&fmts, NULL);
return fmts;
}
const QStringList& AVDemuxer::supportedExtensions()
{
static QStringList exts;
if (exts.isEmpty())
getFFmpegInputFormats(NULL, &exts);
return exts;
}
const QStringList &AVDemuxer::supportedProtocols()
{
static QStringList protocols;
if (!protocols.isEmpty())
return protocols;
#if QTAV_HAVE(AVDEVICE)
protocols << QStringLiteral("avdevice");
#endif
#if !AVFORMAT_STATIC_REGISTER
av_register_all(); // MUST register all input/output formats
#endif
void* opq = 0;
const char* protocol = avio_enum_protocols(&opq, 0);
while (protocol) {
// static string, no deep copy needed. but QByteArray::fromRawData(data,size) assumes data is not null terminated and we must give a size
protocols.append(QString::fromUtf8(protocol));
protocol = avio_enum_protocols(&opq, 0);
}
return protocols;
}
MediaStatus AVDemuxer::mediaStatus() const
{
return d->media_status;
}
bool AVDemuxer::readFrame()
{
QMutexLocker lock(&d->mutex);
Q_UNUSED(lock);
if (!d->format_ctx)
return false;
d->pkt = Packet();
// no lock required because in AVDemuxThread read and seek are in the same thread
AVPacket packet;
av_init_packet(&packet);
d->interrupt_hanlder->begin(InterruptHandler::Read);
int ret = av_read_frame(d->format_ctx, &packet); //0: ok, <0: error/end
d->interrupt_hanlder->end();
// TODO: why return 0 if interrupted by user?
if (ret < 0) {
//end of file. FIXME: why no d->eof if replaying by seek(0)?
// ffplay also check pb && pb->error and exit read thread
if (ret == AVERROR_EOF
|| avio_feof(d->format_ctx->pb)) {
if (!d->eof) {
if (getInterruptStatus()) {
AVError::ErrorCode ec(AVError::ReadError);
QString msg(tr("error reading stream data"));
handleError(ret, &ec, msg);
}
if (mediaStatus() != StalledMedia) {
d->eof = true;
#if 0 // EndOfMedia when demux thread finished
d->started = false;
setMediaStatus(EndOfMedia);
Q_EMIT finished();
#endif
qDebug("End of file. erreof=%d feof=%d", ret == AVERROR_EOF, avio_feof(d->format_ctx->pb));
}
}
av_packet_unref(&packet); //important!
return false;
}
if (ret == AVERROR(EAGAIN)) {
qWarning("demuxer EAGAIN :%s", av_err2str(ret));
av_packet_unref(&packet); //important!
return false;
}
AVError::ErrorCode ec(AVError::ReadError);
QString msg(tr("error reading stream data"));
handleError(ret, &ec, msg);
qWarning("[AVDemuxer] error: %s", av_err2str(ret));
av_packet_unref(&packet); //important!
return false;
}
d->stream = packet.stream_index;
//check whether the 1st frame is alreay got. emit only once
if (!d->started) {
d->started = true;
Q_EMIT started();
}
if (d->stream != videoStream() && d->stream != audioStream() && d->stream != subtitleStream()) {
//qWarning("[AVDemuxer] unknown stream index: %d", stream);
av_packet_unref(&packet); //important!
return false;
}
// TODO: v4l2 copy
d->pkt = Packet::fromAVPacket(&packet, av_q2d(d->format_ctx->streams[d->stream]->time_base));
av_packet_unref(&packet); //important!
d->eof = false;
if (d->pkt.pts > qreal(duration())/1000.0) {
d->max_pts = d->pkt.pts;
}
return true;
}
Packet AVDemuxer::packet() const
{
return d->pkt;
}
int AVDemuxer::stream() const
{
return d->stream;
}
bool AVDemuxer::atEnd() const
{
if (!d->format_ctx)
return false;
if (d->format_ctx->pb) {
AVIOContext *pb = d->format_ctx->pb;
//qDebug("pb->error: %#x, eof: %d, pos: %lld, bufptr: %p", pb->error, pb->eof_reached, pb->pos, pb->buf_ptr);
if (d->eof && (qptrdiff)pb->buf_ptr == d->buf_pos)
return true;
d->buf_pos = (qptrdiff)pb->buf_ptr;
return false;
}
return d->eof;
}
bool AVDemuxer::isSeekable() const
{
return d->seekable;
}
void AVDemuxer::setSeekUnit(SeekUnit unit)
{
d->seek_unit = unit;
}
SeekUnit AVDemuxer::seekUnit() const
{
return d->seek_unit;
}
void AVDemuxer::setSeekType(SeekType target)
{
d->seek_type = target;
}
SeekType AVDemuxer::seekType() const
{
return d->seek_type;
}
//TODO: seek by byte
bool AVDemuxer::seek(qint64 pos)
{
if (!isLoaded())
return false;
//duration: unit is us (10^-6 s, AV_TIME_BASE)
qint64 upos = pos*1000LL; // TODO: av_rescale
if (upos > startTimeUs() + durationUs() || pos < 0LL) {
if (pos >= 0LL && d->input && d->input->isSeekable() && d->input->isVariableSize()) {
qDebug("Seek for variable size hack. %lld %.2f. valid range [%lld, %lld]", upos, double(upos)/double(durationUs()), startTimeUs(), startTimeUs()+durationUs());
} else if (d->max_pts > qreal(duration())/1000.0) { //FIXME
qDebug("Seek (%lld) when video duration is growing %lld=>%lld", pos, duration(), qint64(d->max_pts*1000.0));
} else {
qWarning("Invalid seek position %lld %.2f. valid range [%lld, %lld]", upos, double(upos)/double(durationUs()), startTimeUs(), startTimeUs()+durationUs());
return false;
}
}
d->eof = false;
// no lock required because in AVDemuxThread read and seek are in the same thread
#if 0
//t: unit is s
qreal t = q;// * (double)d->format_ctx->duration; //
int ret = av_seek_frame(d->format_ctx, -1, (int64_t)(t*AV_TIME_BASE), t > d->pkt.pts ? 0 : AVSEEK_FLAG_BACKWARD);
qDebug("[AVDemuxer] seek to %f %f %lld / %lld", q, d->pkt.pts, (int64_t)(t*AV_TIME_BASE), durationUs());
#else
//TODO: d->pkt.pts may be 0, compute manually.
bool backward = d->seek_type == AccurateSeek || upos <= (int64_t)(d->pkt.pts*AV_TIME_BASE);
//qDebug("[AVDemuxer] seek to %f %f %lld / %lld backward=%d", double(upos)/double(durationUs()), d->pkt.pts, upos, durationUs(), backward);
//AVSEEK_FLAG_BACKWARD has no effect? because we know the timestamp
// FIXME: back flag is opposite? otherwise seek is bad and may crash?
/* If stread->inputdex is (-1), a default
* stream is selected, and timestamp is automatically converted
* from AV_TIME_BASE units to the stream specific time_base.
*/
int seek_flag = (backward ? AVSEEK_FLAG_BACKWARD : 0);
if (d->seek_type == AccurateSeek) {
seek_flag = AVSEEK_FLAG_BACKWARD;
}
if (d->seek_type == AnyFrameSeek) {
seek_flag |= AVSEEK_FLAG_ANY;
}
//qDebug("seek flag: %d", seek_flag);
//bool seek_bytes = !!(d->format_ctx->iformat->flags & AVFMT_TS_DISCONT) && strcmp("ogg", d->format_ctx->iformat->name);
int ret = av_seek_frame(d->format_ctx, -1, upos, seek_flag);
//int ret = avformat_seek_file(d->format_ctx, -1, INT64_MIN, upos, upos, seek_flag);
//avformat_seek_file()
if (ret < 0 && (seek_flag & AVSEEK_FLAG_BACKWARD)) {
// seek to 0?
qDebug("av_seek_frame error with flag AVSEEK_FLAG_BACKWARD: %s. try to seek without the flag", av_err2str(ret));
seek_flag &= ~AVSEEK_FLAG_BACKWARD;
ret = av_seek_frame(d->format_ctx, -1, upos, seek_flag);
}
//qDebug("av_seek_frame ret: %d", ret);
#endif
if (ret < 0) {
AVError::ErrorCode ec(AVError::SeekError);
QString msg(tr("seek error"));
handleError(ret, &ec, msg);
return false;
}
// TODO: replay
if (upos <= startTime()) {
qDebug("************seek to beginning. started = false");
d->started = false; //???
if (d->astream.avctx)
d->astream.avctx->frame_number = 0;
if (d->vstream.avctx)
d->vstream.avctx->frame_number = 0; //TODO: why frame_number not changed after seek?
if (d->sstream.avctx)
d->sstream.avctx->frame_number = 0;
}
return true;
}
bool AVDemuxer::seek(qreal q)
{
if (duration() <= 0) {
qWarning("duration() must be valid for percentage seek");
return false;
}
return seek(qint64(q*(double)duration()));
}
QString AVDemuxer::fileName() const
{
return d->file_orig;
}
QIODevice* AVDemuxer::ioDevice() const
{
if (!d->input)
return 0;
if (d->input->name() != QLatin1String("QIODevice"))
return 0;
return d->input->property("device").value<QIODevice*>();
}
MediaIO* AVDemuxer::mediaIO() const
{
return d->input;
}
bool AVDemuxer::setMedia(const QString &fileName)
{
if (d->input) {
delete d->input;
d->input = 0;
}
d->file_orig = fileName;
const QString url_old(d->file);
d->file = fileName.trimmed();
if (d->file.startsWith(QLatin1String("mms:")))
d->file.insert(3, QLatin1Char('h'));
else if (d->file.startsWith(QLatin1String(kFileScheme)))
d->file = Internal::Path::toLocal(d->file);
int colon = d->file.indexOf(QLatin1Char(':'));
if (colon == 1) {
#ifdef Q_OS_WINRT
d->file.prepend(QStringLiteral("qfile:"));
#endif
}
d->media_changed = url_old != d->file;
if (d->media_changed) {
d->format_forced.clear();
}
// a local file. return here to avoid protocol checking. If path contains ":", protocol checking will fail
if (d->file.startsWith(QLatin1Char('/')))
return d->media_changed;
// use MediaIO to support protocols not supported by ffmpeg
colon = d->file.indexOf(QLatin1Char(':'));
if (colon >= 0) {
#ifdef Q_OS_WIN
if (colon == 1 && d->file.at(0).isLetter())
return d->media_changed;
#endif
const QString scheme = colon == 0 ? QStringLiteral("qrc") : d->file.left(colon);
// supportedProtocols() is not complete. so try MediaIO 1st, if not found, fallback to libavformat
d->input = MediaIO::createForProtocol(scheme);
if (d->input) {
d->input->setUrl(d->file);
}
}
return d->media_changed;
}
bool AVDemuxer::setMedia(QIODevice* device)
{
d->file = QString();
d->file_orig = QString();
if (d->input) {
if (d->input->name() != QLatin1String("QIODevice")) {
delete d->input;
d->input = 0;
}
}
if (!d->input)
d->input = MediaIO::create("QIODevice");
QIODevice* old_dev = d->input->property("device").value<QIODevice*>();
d->media_changed = old_dev != device;
if (d->media_changed) {
d->format_forced.clear();
}
d->input->setProperty("device", QVariant::fromValue(device)); //open outside?
return d->media_changed;
}
bool AVDemuxer::setMedia(MediaIO *in)
{
d->media_changed = in != d->input;
if (d->media_changed) {
d->format_forced.clear();
}
d->file = QString();
d->file_orig = QString();
if (!d->input)
d->input = in;
if (d->input != in) {
delete d->input;
d->input = in;
}
return d->media_changed;
}
void AVDemuxer::setFormat(const QString &fmt)
{
d->format_forced = fmt;
}
QString AVDemuxer::formatForced() const
{
return d->format_forced;
}
bool AVDemuxer::load()
{
unload();
qDebug("all closed and reseted");
if (d->file.isEmpty() && !d->input) {
setMediaStatus(NoMedia);
return false;
}
QMutexLocker lock(&d->mutex); // TODO: load in AVDemuxThread and remove all locks
Q_UNUSED(lock);
setMediaStatus(LoadingMedia);
d->checkNetwork();
#if QTAV_HAVE(AVDEVICE)
static const QString avd_scheme(QStringLiteral("avdevice:"));
if (d->file.startsWith(avd_scheme)) {
QStringList parts = d->file.split(QStringLiteral(":"));
int s0 = avd_scheme.size();
const int s1 = d->file.indexOf(QChar(':'), s0);
if (s1 < 0) {
qDebug("invalid avdevice specification");
setMediaStatus(InvalidMedia);
return false;
}
if (d->file.at(s0) == QChar('/') && d->file.at(s0+1) == QChar('/')) {
// avdevice://avfoundation:device_name
s0 += 2;
} // else avdevice:video4linux2:file_name
d->input_format = av_find_input_format(d->file.mid(s0, s1-s0).toUtf8().constData());
d->file = d->file.mid(s1+1);
}
#endif
//alloc av format context
if (!d->format_ctx)
d->format_ctx = avformat_alloc_context();
d->format_ctx->flags |= AVFMT_FLAG_GENPTS;
//install interrupt callback
d->format_ctx->interrupt_callback = *d->interrupt_hanlder;
d->applyOptionsForDict();
// check special dict keys
// d->format_forced can be set from AVFormatContext.format_whitelist
if (!d->format_forced.isEmpty()) {
d->input_format = av_find_input_format(d->format_forced.toUtf8().constData());
qDebug() << "force format: " << d->format_forced;
}
int ret = 0;
// used dict entries will be removed in avformat_open_input
d->interrupt_hanlder->begin(InterruptHandler::Open);
if (d->input) {
if (d->input->accessMode() == MediaIO::Write) {
qWarning("wrong MediaIO accessMode. MUST be Read");
}
d->format_ctx->pb = (AVIOContext*)d->input->avioContext();
d->format_ctx->flags |= AVFMT_FLAG_CUSTOM_IO;
qDebug("avformat_open_input: d->format_ctx:'%p'..., MediaIO('%s'): %p", d->format_ctx, d->input->name().toUtf8().constData(), d->input);
ret = avformat_open_input(&d->format_ctx, "MediaIO", d->input_format, d->options.isEmpty() ? NULL : &d->dict);
qDebug("avformat_open_input: (with MediaIO) ret:%d", ret);
} else {
qDebug("avformat_open_input: d->format_ctx:'%p', url:'%s'...",d->format_ctx, qPrintable(d->file));
ret = avformat_open_input(&d->format_ctx, d->file.toUtf8().constData(), d->input_format, d->options.isEmpty() ? NULL : &d->dict);
qDebug("avformat_open_input: url:'%s' ret:%d",qPrintable(d->file), ret);
}
d->interrupt_hanlder->end();
if (ret < 0) {
// d->format_ctx is 0
AVError::ErrorCode ec = AVError::OpenError;
QString msg = tr("failed to open media");
handleError(ret, &ec, msg);
qWarning() << "Can't open media: " << msg;
if (mediaStatus() == LoadingMedia) //workaround for timeout but not interrupted
setMediaStatus(InvalidMedia);
Q_EMIT unloaded(); //context not ready. so will not emit in unload()
return false;
}
//deprecated
//if(av_find_stread->inputfo(d->format_ctx)<0) {
//TODO: avformat_find_stread->inputfo is too slow, only useful for some video format
d->interrupt_hanlder->begin(InterruptHandler::FindStreamInfo);
ret = avformat_find_stream_info(d->format_ctx, NULL);
d->interrupt_hanlder->end();
if (ret < 0) {
setMediaStatus(InvalidMedia);
AVError::ErrorCode ec(AVError::ParseStreamError);
QString msg(tr("failed to find stream info"));
handleError(ret, &ec, msg);
qWarning() << "Can't find stream info: " << msg;
// context is ready. unloaded() will be emitted in unload()
if (mediaStatus() == LoadingMedia) //workaround for timeout but not interrupted
setMediaStatus(InvalidMedia);
return false;
}
if (!d->prepareStreams()) {
if (mediaStatus() == LoadingMedia)
setMediaStatus(InvalidMedia);
return false;
}
d->started = false;
setMediaStatus(LoadedMedia);
Q_EMIT loaded();
const bool was_seekable = d->seekable;
d->seekable = d->checkSeekable();
if (was_seekable != d->seekable)
Q_EMIT seekableChanged();
qDebug("avfmtctx.flags: %d, iformat.flags", d->format_ctx->flags, d->format_ctx->iformat->flags);
if (getInterruptStatus() < 0) {
QString msg;
qDebug("AVERROR_EXIT: %d", AVERROR_EXIT);
handleError(AVERROR_EXIT, 0, msg);
qWarning() << "User interupted: " << msg;
return false;
}
return true;
}
bool AVDemuxer::unload()
{
QMutexLocker lock(&d->mutex);
Q_UNUSED(lock);
/*
if (d->seekable) {
d->seekable = false; //
Q_EMIT seekableChanged();
}
*/
d->network = false;
d->has_attached_pic = false;
d->eof = false; // true and set false in load()?
d->buf_pos = 0;
d->started = false;
d->max_pts = 0.0;
d->resetStreams();
d->interrupt_hanlder->setStatus(0);
//av_close_input_file(d->format_ctx); //deprecated
if (d->format_ctx) {
qDebug("closing d->format_ctx");
avformat_close_input(&d->format_ctx); //libavf > 53.10.0
d->format_ctx = 0;
d->input_format = 0;
// no delete. may be used in next load
if (d->input)
d->input->release();
Q_EMIT unloaded();
}
return true;
}
bool AVDemuxer::isLoaded() const
{
return d->format_ctx && (d->astream.avctx || d->vstream.avctx || d->sstream.avctx);
}
bool AVDemuxer::hasAttacedPicture() const
{
return d->has_attached_pic;
}
bool AVDemuxer::setStreamIndex(StreamType st, int index)
{
QList<int> *streams = 0;
Private::StreamInfo *si = 0;
if (st == AudioStream) { // TODO: use a struct
si = &d->astream;
streams = &d->audio_streams;
} else if (st == VideoStream) {
si = &d->vstream;
streams = &d->video_streams;
} else if (st == SubtitleStream) {
si = &d->sstream;
streams = &d->subtitle_streams;
}
if (!si) {
qWarning("stream type %d for index %d not found", st, index);
return false;
}
if (index >= streams->size()) {// || index < 0) { //TODO: disable if <0
//si->wanted_stream = -1;
qWarning("invalid index %d (valid is 0~%d) for stream type %d.", index, streams->size(), st);
return false;
}
if (index < 0) {
qDebug("disable %d stream", st);
si->stream = -1;
si->wanted_index = -1;
si->wanted_stream = -1;
return true;
}
if (!d->setStream(st, streams->at(index)))
return false;
si->wanted_index = index;
return true;
}
AVFormatContext* AVDemuxer::formatContext()
{
return d->format_ctx;
}
QString AVDemuxer::formatName() const
{
if (!d->format_ctx)
return QString();
return QLatin1String(d->format_ctx->iformat->name);
}
QString AVDemuxer::formatLongName() const
{
if (!d->format_ctx)
return QString();
return QLatin1String(d->format_ctx->iformat->long_name);
}
// convert to s using AV_TIME_BASE then *1000?
qint64 AVDemuxer::startTime() const
{
return startTimeUs()/1000LL; //TODO: av_rescale
}
qint64 AVDemuxer::duration() const
{
return durationUs()/1000LL; //time base: AV_TIME_BASE TODO: av_rescale
}
//AVFrameContext use AV_TIME_BASE as time base. AVStream use their own timebase
qint64 AVDemuxer::startTimeUs() const
{
// start time may be not null for network stream
if (!d->format_ctx || d->format_ctx->start_time == AV_NOPTS_VALUE)
return 0;
return d->format_ctx->start_time;
}
qint64 AVDemuxer::durationUs() const
{
if (!d->format_ctx || d->format_ctx->duration == AV_NOPTS_VALUE)
return 0;
return d->format_ctx->duration; //time base: AV_TIME_BASE
}
int AVDemuxer::bitRate() const
{
return d->format_ctx->bit_rate;
}