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846 lines
24 KiB
C++
846 lines
24 KiB
C++
#include "videostate.hpp"
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#include <algorithm>
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#include <cassert>
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#include <iostream>
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#include <osg/Texture2D>
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extern "C"
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{
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#include <libavcodec/avcodec.h>
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#include <libavformat/avformat.h>
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#include <libswscale/swscale.h>
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// From libavformat version 55.0.100 and onward the declaration of av_gettime() is
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// removed from libavformat/avformat.h and moved to libavutil/time.h
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// https://github.com/FFmpeg/FFmpeg/commit/06a83505992d5f49846c18507a6c3eb8a47c650e
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#if AV_VERSION_INT(55, 0, 100) <= AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
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LIBAVFORMAT_VERSION_MINOR, LIBAVFORMAT_VERSION_MICRO)
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#include <libavutil/time.h>
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#endif
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#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(55,28,1)
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#define av_frame_alloc avcodec_alloc_frame
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#endif
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}
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static const char* flushString = "FLUSH";
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struct FlushPacket : AVPacket
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{
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FlushPacket()
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: AVPacket()
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{
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data = ( (uint8_t*)flushString);
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}
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};
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static FlushPacket flush_pkt;
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#include "videoplayer.hpp"
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#include "audiodecoder.hpp"
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#include "audiofactory.hpp"
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namespace
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{
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const int MAX_AUDIOQ_SIZE = (5 * 16 * 1024);
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const int MAX_VIDEOQ_SIZE = (5 * 256 * 1024);
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}
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namespace Video
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{
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VideoState::VideoState()
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: mAudioFactory(NULL)
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, format_ctx(NULL)
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, av_sync_type(AV_SYNC_DEFAULT)
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, audio_st(NULL)
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, video_st(NULL), frame_last_pts(0.0)
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, video_clock(0.0), sws_context(NULL), rgbaFrame(NULL), pictq_size(0)
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, pictq_rindex(0), pictq_windex(0)
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, mSeekRequested(false)
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, mSeekPos(0)
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, mVideoEnded(false)
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, mPaused(false)
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, mQuit(false)
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{
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mFlushPktData = flush_pkt.data;
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// Register all formats and codecs
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av_register_all();
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}
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VideoState::~VideoState()
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{
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deinit();
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}
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void VideoState::setAudioFactory(MovieAudioFactory *factory)
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{
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mAudioFactory = factory;
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}
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void PacketQueue::put(AVPacket *pkt)
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{
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AVPacketList *pkt1;
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if(pkt != &flush_pkt && !pkt->buf && av_dup_packet(pkt) < 0)
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throw std::runtime_error("Failed to duplicate packet");
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pkt1 = (AVPacketList*)av_malloc(sizeof(AVPacketList));
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if(!pkt1) throw std::bad_alloc();
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pkt1->pkt = *pkt;
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pkt1->next = NULL;
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this->mutex.lock ();
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if(!last_pkt)
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this->first_pkt = pkt1;
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else
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this->last_pkt->next = pkt1;
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this->last_pkt = pkt1;
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this->nb_packets++;
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this->size += pkt1->pkt.size;
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this->cond.signal();
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this->mutex.unlock();
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}
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int PacketQueue::get(AVPacket *pkt, VideoState *is)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(this->mutex);
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while(!is->mQuit)
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{
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AVPacketList *pkt1 = this->first_pkt;
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if(pkt1)
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{
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this->first_pkt = pkt1->next;
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if(!this->first_pkt)
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this->last_pkt = NULL;
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this->nb_packets--;
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this->size -= pkt1->pkt.size;
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*pkt = pkt1->pkt;
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av_free(pkt1);
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return 1;
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}
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if(this->flushing)
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break;
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this->cond.wait(&this->mutex);
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}
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return -1;
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}
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void PacketQueue::flush()
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{
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this->flushing = true;
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this->cond.signal();
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}
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void PacketQueue::clear()
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{
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AVPacketList *pkt, *pkt1;
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this->mutex.lock();
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for(pkt = this->first_pkt; pkt != NULL; pkt = pkt1)
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{
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pkt1 = pkt->next;
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if (pkt->pkt.data != flush_pkt.data)
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av_free_packet(&pkt->pkt);
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av_freep(&pkt);
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}
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this->last_pkt = NULL;
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this->first_pkt = NULL;
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this->nb_packets = 0;
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this->size = 0;
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this->mutex.unlock ();
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}
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int VideoState::istream_read(void *user_data, uint8_t *buf, int buf_size)
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{
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try
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{
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std::istream& stream = *static_cast<VideoState*>(user_data)->stream;
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stream.clear();
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stream.read((char*)buf, buf_size);
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return stream.gcount();
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}
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catch (std::exception& )
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{
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return 0;
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}
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}
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int VideoState::istream_write(void *, uint8_t *, int)
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{
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throw std::runtime_error("can't write to read-only stream");
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}
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int64_t VideoState::istream_seek(void *user_data, int64_t offset, int whence)
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{
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std::istream& stream = *static_cast<VideoState*>(user_data)->stream;
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whence &= ~AVSEEK_FORCE;
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stream.clear();
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if(whence == AVSEEK_SIZE)
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{
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size_t prev = stream.tellg();
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stream.seekg(0, std::ios_base::end);
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size_t size = stream.tellg();
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stream.seekg(prev, std::ios_base::beg);
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return size;
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}
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if(whence == SEEK_SET)
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stream.seekg(offset, std::ios_base::beg);
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else if(whence == SEEK_CUR)
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stream.seekg(offset, std::ios_base::cur);
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else if(whence == SEEK_END)
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stream.seekg(offset, std::ios_base::end);
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else
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return -1;
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return stream.tellg();
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}
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void VideoState::video_display(VideoPicture *vp)
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{
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if((*this->video_st)->codec->width != 0 && (*this->video_st)->codec->height != 0)
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{
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if (!mTexture.get())
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{
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mTexture = new osg::Texture2D;
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mTexture->setDataVariance(osg::Object::DYNAMIC);
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mTexture->setResizeNonPowerOfTwoHint(false);
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mTexture->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
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mTexture->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
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}
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osg::ref_ptr<osg::Image> image = new osg::Image;
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image->setImage((*this->video_st)->codec->width, (*this->video_st)->codec->height,
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1, GL_RGBA, GL_RGBA, GL_UNSIGNED_BYTE, &vp->data[0], osg::Image::NO_DELETE);
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mTexture->setImage(image);
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}
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}
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void VideoState::video_refresh()
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(this->pictq_mutex);
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if(this->pictq_size == 0)
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return;
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if (this->av_sync_type == AV_SYNC_VIDEO_MASTER)
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{
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VideoPicture* vp = &this->pictq[this->pictq_rindex];
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this->video_display(vp);
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this->pictq_rindex = (pictq_rindex+1) % VIDEO_PICTURE_ARRAY_SIZE;
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this->frame_last_pts = vp->pts;
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this->pictq_size--;
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this->pictq_cond.signal();
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}
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else
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{
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const float threshold = 0.03f;
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if (this->pictq[pictq_rindex].pts > this->get_master_clock() + threshold)
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return; // not ready yet to show this picture
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// TODO: the conversion to RGBA is done in the decoding thread, so if a picture is skipped here, then it was
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// unnecessarily converted. But we may want to replace the conversion by a pixel shader anyway (see comment in queue_picture)
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int i=0;
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for (; i<this->pictq_size-1; ++i)
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{
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if (this->pictq[pictq_rindex].pts + threshold <= this->get_master_clock())
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this->pictq_rindex = (this->pictq_rindex+1) % VIDEO_PICTURE_ARRAY_SIZE; // not enough time to show this picture
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else
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break;
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}
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assert (this->pictq_rindex < VIDEO_PICTURE_ARRAY_SIZE);
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VideoPicture* vp = &this->pictq[this->pictq_rindex];
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this->video_display(vp);
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this->frame_last_pts = vp->pts;
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this->pictq_size -= i;
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// update queue for next picture
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this->pictq_size--;
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this->pictq_rindex = (this->pictq_rindex+1) % VIDEO_PICTURE_ARRAY_SIZE;
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this->pictq_cond.signal();
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}
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}
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int VideoState::queue_picture(AVFrame *pFrame, double pts)
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{
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VideoPicture *vp;
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/* wait until we have a new pic */
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(this->pictq_mutex);
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while(this->pictq_size >= VIDEO_PICTURE_QUEUE_SIZE && !this->mQuit)
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this->pictq_cond.wait(&this->pictq_mutex, 1);
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}
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if(this->mQuit)
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return -1;
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this->pictq_mutex.lock();
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// windex is set to 0 initially
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vp = &this->pictq[this->pictq_windex];
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// Convert the image into RGBA format
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// TODO: we could do this in a pixel shader instead, if the source format
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// matches a commonly used format (ie YUV420P)
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if(this->sws_context == NULL)
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{
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int w = (*this->video_st)->codec->width;
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int h = (*this->video_st)->codec->height;
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this->sws_context = sws_getContext(w, h, (*this->video_st)->codec->pix_fmt,
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w, h, AV_PIX_FMT_RGBA, SWS_BICUBIC,
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NULL, NULL, NULL);
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if(this->sws_context == NULL)
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throw std::runtime_error("Cannot initialize the conversion context!\n");
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}
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vp->pts = pts;
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vp->data.resize((*this->video_st)->codec->width * (*this->video_st)->codec->height * 4);
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uint8_t *dst[4] = { &vp->data[0], nullptr, nullptr, nullptr };
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sws_scale(this->sws_context, pFrame->data, pFrame->linesize,
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0, (*this->video_st)->codec->height, dst, this->rgbaFrame->linesize);
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// now we inform our display thread that we have a pic ready
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this->pictq_windex = (this->pictq_windex+1) % VIDEO_PICTURE_ARRAY_SIZE;
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this->pictq_size++;
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this->pictq_mutex.unlock();
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return 0;
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}
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double VideoState::synchronize_video(AVFrame *src_frame, double pts)
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{
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double frame_delay;
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/* if we have pts, set video clock to it */
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if(pts != 0)
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this->video_clock = pts;
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else
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pts = this->video_clock;
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/* update the video clock */
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frame_delay = av_q2d((*this->video_st)->codec->time_base);
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/* if we are repeating a frame, adjust clock accordingly */
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frame_delay += src_frame->repeat_pict * (frame_delay * 0.5);
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this->video_clock += frame_delay;
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return pts;
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}
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static void our_free_buffer(void *opaque, uint8_t *data);
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/* These are called whenever we allocate a frame
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* buffer. We use this to store the global_pts in
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* a frame at the time it is allocated.
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*/
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static int64_t global_video_pkt_pts = AV_NOPTS_VALUE;
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static int our_get_buffer(struct AVCodecContext *c, AVFrame *pic, int flags)
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{
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AVBufferRef *ref;
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int ret = avcodec_default_get_buffer2(c, pic, flags);
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int64_t *pts = (int64_t*)av_malloc(sizeof(int64_t));
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*pts = global_video_pkt_pts;
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pic->opaque = pts;
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ref = av_buffer_create((uint8_t *)pic->opaque, sizeof(int64_t), our_free_buffer, pic->buf[0], flags);
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pic->buf[0] = ref;
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return ret;
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}
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static void our_free_buffer(void *opaque, uint8_t *data)
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{
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AVBufferRef *ref = (AVBufferRef *)opaque;
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av_buffer_unref(&ref);
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av_free(data);
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}
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class VideoThread : public OpenThreads::Thread
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{
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public:
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VideoThread(VideoState* self)
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: mVideoState(self)
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{
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start();
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}
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virtual void run()
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{
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VideoState* self = mVideoState;
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AVPacket pkt1, *packet = &pkt1;
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int frameFinished;
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AVFrame *pFrame;
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pFrame = av_frame_alloc();
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self->rgbaFrame = av_frame_alloc();
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avpicture_alloc((AVPicture*)self->rgbaFrame, AV_PIX_FMT_RGBA, (*self->video_st)->codec->width, (*self->video_st)->codec->height);
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while(self->videoq.get(packet, self) >= 0)
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{
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if(packet->data == flush_pkt.data)
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{
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avcodec_flush_buffers((*self->video_st)->codec);
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self->pictq_mutex.lock();
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self->pictq_size = 0;
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self->pictq_rindex = 0;
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self->pictq_windex = 0;
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self->pictq_mutex.unlock();
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self->frame_last_pts = packet->pts * av_q2d((*self->video_st)->time_base);
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global_video_pkt_pts = static_cast<int64_t>(self->frame_last_pts);
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continue;
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}
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// Save global pts to be stored in pFrame
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global_video_pkt_pts = packet->pts;
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// Decode video frame
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if(avcodec_decode_video2((*self->video_st)->codec, pFrame, &frameFinished, packet) < 0)
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throw std::runtime_error("Error decoding video frame");
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double pts = 0;
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if(packet->dts != AV_NOPTS_VALUE)
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pts = static_cast<double>(packet->dts);
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else if(pFrame->opaque && *(int64_t*)pFrame->opaque != AV_NOPTS_VALUE)
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pts = static_cast<double>(*(int64_t*)pFrame->opaque);
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pts *= av_q2d((*self->video_st)->time_base);
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av_free_packet(packet);
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// Did we get a video frame?
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if(frameFinished)
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{
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pts = self->synchronize_video(pFrame, pts);
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if(self->queue_picture(pFrame, pts) < 0)
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break;
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}
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}
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av_free(pFrame);
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avpicture_free((AVPicture*)self->rgbaFrame);
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av_free(self->rgbaFrame);
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}
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private:
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VideoState* mVideoState;
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};
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class ParseThread : public OpenThreads::Thread
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{
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public:
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ParseThread(VideoState* self)
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: mVideoState(self)
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{
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start();
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}
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virtual void run()
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{
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VideoState* self = mVideoState;
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AVFormatContext *pFormatCtx = self->format_ctx;
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AVPacket pkt1, *packet = &pkt1;
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try
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{
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if(!self->video_st && !self->audio_st)
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throw std::runtime_error("No streams to decode");
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// main decode loop
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while(!self->mQuit)
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{
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if(self->mSeekRequested)
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{
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uint64_t seek_target = self->mSeekPos;
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int streamIndex = -1;
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int videoStreamIndex = -1;;
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int audioStreamIndex = -1;
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if (self->video_st)
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videoStreamIndex = self->video_st - self->format_ctx->streams;
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if (self->audio_st)
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audioStreamIndex = self->audio_st - self->format_ctx->streams;
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if(videoStreamIndex >= 0)
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streamIndex = videoStreamIndex;
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else if(audioStreamIndex >= 0)
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streamIndex = audioStreamIndex;
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uint64_t timestamp = seek_target;
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// QtCreator's highlighter doesn't like AV_TIME_BASE_Q's {} initializer for some reason
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AVRational avTimeBaseQ = AVRational(); // = AV_TIME_BASE_Q;
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avTimeBaseQ.num = 1;
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avTimeBaseQ.den = AV_TIME_BASE;
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if(streamIndex >= 0)
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timestamp = av_rescale_q(seek_target, avTimeBaseQ, self->format_ctx->streams[streamIndex]->time_base);
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// AVSEEK_FLAG_BACKWARD appears to be needed, otherwise ffmpeg may seek to a keyframe *after* the given time
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// we want to seek to any keyframe *before* the given time, so we can continue decoding as normal from there on
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if(av_seek_frame(self->format_ctx, streamIndex, timestamp, AVSEEK_FLAG_BACKWARD) < 0)
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std::cerr << "Error seeking " << self->format_ctx->filename << std::endl;
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else
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{
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// Clear the packet queues and put a special packet with the new clock time
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if(audioStreamIndex >= 0)
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{
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self->audioq.clear();
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flush_pkt.pts = av_rescale_q(seek_target, avTimeBaseQ,
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self->format_ctx->streams[audioStreamIndex]->time_base);
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self->audioq.put(&flush_pkt);
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}
|
|
if(videoStreamIndex >= 0)
|
|
{
|
|
self->videoq.clear();
|
|
flush_pkt.pts = av_rescale_q(seek_target, avTimeBaseQ,
|
|
self->format_ctx->streams[videoStreamIndex]->time_base);
|
|
self->videoq.put(&flush_pkt);
|
|
}
|
|
self->pictq_mutex.lock();
|
|
self->pictq_size = 0;
|
|
self->pictq_rindex = 0;
|
|
self->pictq_windex = 0;
|
|
self->pictq_mutex.unlock();
|
|
self->mExternalClock.set(seek_target);
|
|
}
|
|
self->mSeekRequested = false;
|
|
}
|
|
|
|
|
|
if((self->audio_st && self->audioq.size > MAX_AUDIOQ_SIZE) ||
|
|
(self->video_st && self->videoq.size > MAX_VIDEOQ_SIZE))
|
|
{
|
|
OpenThreads::Thread::microSleep(10 * 1000);
|
|
continue;
|
|
}
|
|
|
|
if(av_read_frame(pFormatCtx, packet) < 0)
|
|
{
|
|
if (self->audioq.nb_packets == 0 && self->videoq.nb_packets == 0 && self->pictq_size == 0)
|
|
self->mVideoEnded = true;
|
|
continue;
|
|
}
|
|
else
|
|
self->mVideoEnded = false;
|
|
|
|
// Is this a packet from the video stream?
|
|
if(self->video_st && packet->stream_index == self->video_st-pFormatCtx->streams)
|
|
self->videoq.put(packet);
|
|
else if(self->audio_st && packet->stream_index == self->audio_st-pFormatCtx->streams)
|
|
self->audioq.put(packet);
|
|
else
|
|
av_free_packet(packet);
|
|
}
|
|
}
|
|
catch(std::exception& e) {
|
|
std::cerr << "An error occurred playing the video: " << e.what () << std::endl;
|
|
}
|
|
|
|
self->mQuit = true;
|
|
}
|
|
|
|
private:
|
|
VideoState* mVideoState;
|
|
};
|
|
|
|
|
|
bool VideoState::update()
|
|
{
|
|
this->video_refresh();
|
|
return !this->mVideoEnded;
|
|
}
|
|
|
|
|
|
int VideoState::stream_open(int stream_index, AVFormatContext *pFormatCtx)
|
|
{
|
|
AVCodecContext *codecCtx;
|
|
AVCodec *codec;
|
|
|
|
if(stream_index < 0 || stream_index >= static_cast<int>(pFormatCtx->nb_streams))
|
|
return -1;
|
|
|
|
// Get a pointer to the codec context for the video stream
|
|
codecCtx = pFormatCtx->streams[stream_index]->codec;
|
|
codec = avcodec_find_decoder(codecCtx->codec_id);
|
|
if(!codec || (avcodec_open2(codecCtx, codec, NULL) < 0))
|
|
{
|
|
fprintf(stderr, "Unsupported codec!\n");
|
|
return -1;
|
|
}
|
|
|
|
switch(codecCtx->codec_type)
|
|
{
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
this->audio_st = pFormatCtx->streams + stream_index;
|
|
|
|
if (!mAudioFactory)
|
|
{
|
|
std::cerr << "No audio factory registered, can not play audio stream" << std::endl;
|
|
avcodec_close((*this->audio_st)->codec);
|
|
this->audio_st = NULL;
|
|
return -1;
|
|
}
|
|
|
|
mAudioDecoder = mAudioFactory->createDecoder(this);
|
|
if (!mAudioDecoder.get())
|
|
{
|
|
std::cerr << "Failed to create audio decoder, can not play audio stream" << std::endl;
|
|
avcodec_close((*this->audio_st)->codec);
|
|
this->audio_st = NULL;
|
|
return -1;
|
|
}
|
|
mAudioDecoder->setupFormat();
|
|
break;
|
|
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
this->video_st = pFormatCtx->streams + stream_index;
|
|
|
|
codecCtx->get_buffer2 = our_get_buffer;
|
|
this->video_thread.reset(new VideoThread(this));
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void VideoState::init(std::shared_ptr<std::istream> inputstream, const std::string &name)
|
|
{
|
|
int video_index = -1;
|
|
int audio_index = -1;
|
|
unsigned int i;
|
|
|
|
this->av_sync_type = AV_SYNC_DEFAULT;
|
|
this->mQuit = false;
|
|
|
|
this->stream = inputstream;
|
|
if(!this->stream.get())
|
|
throw std::runtime_error("Failed to open video resource");
|
|
|
|
AVIOContext *ioCtx = avio_alloc_context(NULL, 0, 0, this, istream_read, istream_write, istream_seek);
|
|
if(!ioCtx) throw std::runtime_error("Failed to allocate AVIOContext");
|
|
|
|
this->format_ctx = avformat_alloc_context();
|
|
if(this->format_ctx)
|
|
this->format_ctx->pb = ioCtx;
|
|
|
|
// Open video file
|
|
///
|
|
/// format_ctx->pb->buffer must be freed by hand,
|
|
/// if not, valgrind will show memleak, see:
|
|
///
|
|
/// https://trac.ffmpeg.org/ticket/1357
|
|
///
|
|
if(!this->format_ctx || avformat_open_input(&this->format_ctx, name.c_str(), NULL, NULL))
|
|
{
|
|
if (this->format_ctx != NULL)
|
|
{
|
|
if (this->format_ctx->pb != NULL)
|
|
{
|
|
av_free(this->format_ctx->pb->buffer);
|
|
this->format_ctx->pb->buffer = NULL;
|
|
|
|
av_free(this->format_ctx->pb);
|
|
this->format_ctx->pb = NULL;
|
|
}
|
|
}
|
|
// "Note that a user-supplied AVFormatContext will be freed on failure."
|
|
this->format_ctx = NULL;
|
|
av_free(ioCtx);
|
|
throw std::runtime_error("Failed to open video input");
|
|
}
|
|
|
|
// Retrieve stream information
|
|
if(avformat_find_stream_info(this->format_ctx, NULL) < 0)
|
|
throw std::runtime_error("Failed to retrieve stream information");
|
|
|
|
// Dump information about file onto standard error
|
|
av_dump_format(this->format_ctx, 0, name.c_str(), 0);
|
|
|
|
for(i = 0;i < this->format_ctx->nb_streams;i++)
|
|
{
|
|
if(this->format_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO && video_index < 0)
|
|
video_index = i;
|
|
if(this->format_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO && audio_index < 0)
|
|
audio_index = i;
|
|
}
|
|
|
|
mExternalClock.set(0);
|
|
|
|
if(audio_index >= 0)
|
|
this->stream_open(audio_index, this->format_ctx);
|
|
|
|
if(video_index >= 0)
|
|
{
|
|
this->stream_open(video_index, this->format_ctx);
|
|
}
|
|
|
|
|
|
this->parse_thread.reset(new ParseThread(this));
|
|
}
|
|
|
|
void VideoState::deinit()
|
|
{
|
|
this->mQuit = true;
|
|
|
|
this->audioq.flush();
|
|
this->videoq.flush();
|
|
|
|
mAudioDecoder.reset();
|
|
|
|
if (this->parse_thread.get())
|
|
{
|
|
this->parse_thread->join();
|
|
this->parse_thread.reset();
|
|
}
|
|
if (this->video_thread.get())
|
|
{
|
|
this->video_thread->join();
|
|
this->video_thread.reset();
|
|
}
|
|
|
|
if(this->audio_st)
|
|
avcodec_close((*this->audio_st)->codec);
|
|
this->audio_st = NULL;
|
|
if(this->video_st)
|
|
avcodec_close((*this->video_st)->codec);
|
|
this->video_st = NULL;
|
|
|
|
if(this->sws_context)
|
|
sws_freeContext(this->sws_context);
|
|
this->sws_context = NULL;
|
|
|
|
if(this->format_ctx)
|
|
{
|
|
///
|
|
/// format_ctx->pb->buffer must be freed by hand,
|
|
/// if not, valgrind will show memleak, see:
|
|
///
|
|
/// https://trac.ffmpeg.org/ticket/1357
|
|
///
|
|
if (this->format_ctx->pb != NULL)
|
|
{
|
|
av_free(this->format_ctx->pb->buffer);
|
|
this->format_ctx->pb->buffer = NULL;
|
|
|
|
av_free(this->format_ctx->pb);
|
|
this->format_ctx->pb = NULL;
|
|
}
|
|
avformat_close_input(&this->format_ctx);
|
|
}
|
|
|
|
if (mTexture)
|
|
{
|
|
// reset Image separately, it's pointing to *this and there might still be outside references to mTexture
|
|
mTexture->setImage(NULL);
|
|
mTexture = NULL;
|
|
}
|
|
}
|
|
|
|
double VideoState::get_external_clock()
|
|
{
|
|
return mExternalClock.get() / 1000000.0;
|
|
}
|
|
|
|
double VideoState::get_master_clock()
|
|
{
|
|
if(this->av_sync_type == AV_SYNC_VIDEO_MASTER)
|
|
return this->get_video_clock();
|
|
if(this->av_sync_type == AV_SYNC_AUDIO_MASTER)
|
|
return this->get_audio_clock();
|
|
return this->get_external_clock();
|
|
}
|
|
|
|
double VideoState::get_video_clock()
|
|
{
|
|
return this->frame_last_pts;
|
|
}
|
|
|
|
double VideoState::get_audio_clock()
|
|
{
|
|
if (!mAudioDecoder.get())
|
|
return 0.0;
|
|
return mAudioDecoder->getAudioClock();
|
|
}
|
|
|
|
void VideoState::setPaused(bool isPaused)
|
|
{
|
|
this->mPaused = isPaused;
|
|
mExternalClock.setPaused(isPaused);
|
|
}
|
|
|
|
void VideoState::seekTo(double time)
|
|
{
|
|
time = std::max(0.0, time);
|
|
time = std::min(getDuration(), time);
|
|
mSeekPos = (uint64_t) (time * AV_TIME_BASE);
|
|
mSeekRequested = true;
|
|
}
|
|
|
|
double VideoState::getDuration()
|
|
{
|
|
return this->format_ctx->duration / 1000000.0;
|
|
}
|
|
|
|
|
|
ExternalClock::ExternalClock()
|
|
: mTimeBase(av_gettime())
|
|
, mPausedAt(0)
|
|
, mPaused(false)
|
|
{
|
|
}
|
|
|
|
void ExternalClock::setPaused(bool paused)
|
|
{
|
|
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mMutex);
|
|
if (mPaused == paused)
|
|
return;
|
|
if (paused)
|
|
{
|
|
mPausedAt = av_gettime() - mTimeBase;
|
|
}
|
|
else
|
|
mTimeBase = av_gettime() - mPausedAt;
|
|
mPaused = paused;
|
|
}
|
|
|
|
uint64_t ExternalClock::get()
|
|
{
|
|
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mMutex);
|
|
if (mPaused)
|
|
return mPausedAt;
|
|
else
|
|
return av_gettime() - mTimeBase;
|
|
}
|
|
|
|
void ExternalClock::set(uint64_t time)
|
|
{
|
|
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(mMutex);
|
|
mTimeBase = av_gettime() - time;
|
|
mPausedAt = time;
|
|
}
|
|
|
|
}
|
|
|