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@ -11,19 +11,7 @@ extern "C"
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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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@ -54,6 +42,8 @@ namespace Video
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VideoState::VideoState()
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: mAudioFactory(NULL)
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, format_ctx(NULL)
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, video_ctx(NULL)
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, audio_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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@ -67,8 +57,10 @@ VideoState::VideoState()
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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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// This is not needed anymore above FFMpeg version 4.0
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#if LIBAVCODEC_VERSION_INT < 3805796
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av_register_all();
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#endif
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}
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VideoState::~VideoState()
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@ -85,11 +77,12 @@ void VideoState::setAudioFactory(MovieAudioFactory *factory)
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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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if(pkt != &flush_pkt && !pkt->buf && av_packet_ref(&pkt1->pkt, pkt) < 0)
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throw std::runtime_error("Failed to duplicate packet");
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pkt1->pkt = *pkt;
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pkt1->next = NULL;
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@ -150,7 +143,7 @@ void PacketQueue::clear()
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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_packet_unref(&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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@ -211,7 +204,7 @@ int64_t VideoState::istream_seek(void *user_data, int64_t offset, int whence)
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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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if(this->video_ctx->width != 0 && this->video_ctx->height != 0)
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{
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if (!mTexture.get())
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{
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@ -224,7 +217,7 @@ void VideoState::video_display(VideoPicture *vp)
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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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image->setImage(this->video_ctx->width, this->video_ctx->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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@ -303,9 +296,9 @@ int VideoState::queue_picture(AVFrame *pFrame, double pts)
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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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int w = this->video_ctx->width;
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int h = this->video_ctx->height;
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this->sws_context = sws_getContext(w, h, this->video_ctx->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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@ -313,11 +306,11 @@ int VideoState::queue_picture(AVFrame *pFrame, double pts)
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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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vp->data.resize(this->video_ctx->width * this->video_ctx->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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0, this->video_ctx->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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@ -338,7 +331,7 @@ double VideoState::synchronize_video(AVFrame *src_frame, double pts)
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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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frame_delay = av_q2d(this->video_ctx->pkt_timebase);
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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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@ -347,30 +340,6 @@ double VideoState::synchronize_video(AVFrame *src_frame, double pts)
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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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@ -384,19 +353,18 @@ public:
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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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av_image_alloc(self->rgbaFrame->data, self->rgbaFrame->linesize, self->video_ctx->width, self->video_ctx->height, AV_PIX_FMT_RGBA, 1);
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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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avcodec_flush_buffers(self->video_ctx);
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self->pictq_mutex.lock();
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self->pictq_size = 0;
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@ -405,37 +373,36 @@ public:
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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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int ret = avcodec_send_packet(self->video_ctx, packet);
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// EAGAIN is not expected
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if (ret < 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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while (!ret)
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{
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ret = avcodec_receive_frame(self->video_ctx, pFrame);
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if (!ret)
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{
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double pts = pFrame->best_effort_timestamp;
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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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}
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av_packet_unref(packet);
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av_free(pFrame);
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avpicture_free((AVPicture*)self->rgbaFrame);
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av_freep(&self->rgbaFrame->data[0]);
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av_free(self->rgbaFrame);
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}
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@ -497,7 +464,14 @@ public:
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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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{
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// In the FFMpeg 4.0 a "filename" field was replaced by "url"
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#if LIBAVCODEC_VERSION_INT < 3805796
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std::cerr << "Error seeking " << self->format_ctx->filename << std::endl;
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#else
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std::cerr << "Error seeking " << self->format_ctx->url << std::endl;
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#endif
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}
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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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@ -548,7 +522,7 @@ public:
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else if(self->audio_st && packet->stream_index == self->audio_st-pFormatCtx->streams)
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self->audioq.put(packet);
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else
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av_free_packet(packet);
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av_packet_unref(packet);
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}
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}
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catch(std::exception& e) {
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@ -572,30 +546,43 @@ bool VideoState::update()
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int VideoState::stream_open(int stream_index, AVFormatContext *pFormatCtx)
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{
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AVCodecContext *codecCtx;
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AVCodec *codec;
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if(stream_index < 0 || stream_index >= static_cast<int>(pFormatCtx->nb_streams))
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return -1;
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// Get a pointer to the codec context for the video stream
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codecCtx = pFormatCtx->streams[stream_index]->codec;
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codec = avcodec_find_decoder(codecCtx->codec_id);
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if(!codec || (avcodec_open2(codecCtx, codec, NULL) < 0))
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codec = avcodec_find_decoder(pFormatCtx->streams[stream_index]->codecpar->codec_id);
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if(!codec)
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{
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fprintf(stderr, "Unsupported codec!\n");
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return -1;
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}
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switch(codecCtx->codec_type)
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switch(pFormatCtx->streams[stream_index]->codecpar->codec_type)
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{
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case AVMEDIA_TYPE_AUDIO:
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this->audio_st = pFormatCtx->streams + stream_index;
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// Get a pointer to the codec context for the video stream
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this->audio_ctx = avcodec_alloc_context3(codec);
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avcodec_parameters_to_context(this->audio_ctx, pFormatCtx->streams[stream_index]->codecpar);
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// This is not needed anymore above FFMpeg version 4.0
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#if LIBAVCODEC_VERSION_INT < 3805796
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av_codec_set_pkt_timebase(this->audio_ctx, pFormatCtx->streams[stream_index]->time_base);
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#endif
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if (avcodec_open2(this->audio_ctx, codec, NULL) < 0)
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{
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fprintf(stderr, "Unsupported codec!\n");
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return -1;
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}
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if (!mAudioFactory)
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{
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std::cerr << "No audio factory registered, can not play audio stream" << std::endl;
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avcodec_close((*this->audio_st)->codec);
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avcodec_free_context(&this->audio_ctx);
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this->audio_st = NULL;
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return -1;
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}
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@ -604,7 +591,7 @@ int VideoState::stream_open(int stream_index, AVFormatContext *pFormatCtx)
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if (!mAudioDecoder.get())
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{
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std::cerr << "Failed to create audio decoder, can not play audio stream" << std::endl;
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avcodec_close((*this->audio_st)->codec);
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avcodec_free_context(&this->audio_ctx);
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this->audio_st = NULL;
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return -1;
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}
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@ -614,7 +601,21 @@ int VideoState::stream_open(int stream_index, AVFormatContext *pFormatCtx)
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case AVMEDIA_TYPE_VIDEO:
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this->video_st = pFormatCtx->streams + stream_index;
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codecCtx->get_buffer2 = our_get_buffer;
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// Get a pointer to the codec context for the video stream
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this->video_ctx = avcodec_alloc_context3(codec);
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avcodec_parameters_to_context(this->video_ctx, pFormatCtx->streams[stream_index]->codecpar);
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// This is not needed anymore above FFMpeg version 4.0
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#if LIBAVCODEC_VERSION_INT < 3805796
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av_codec_set_pkt_timebase(this->video_ctx, pFormatCtx->streams[stream_index]->time_base);
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#endif
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if (avcodec_open2(this->video_ctx, codec, NULL) < 0)
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{
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fprintf(stderr, "Unsupported codec!\n");
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return -1;
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}
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this->video_thread.reset(new VideoThread(this));
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break;
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@ -680,9 +681,9 @@ void VideoState::init(std::shared_ptr<std::istream> inputstream, const std::stri
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for(i = 0;i < this->format_ctx->nb_streams;i++)
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{
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if(this->format_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO && video_index < 0)
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if(this->format_ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && video_index < 0)
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video_index = i;
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if(this->format_ctx->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO && audio_index < 0)
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if(this->format_ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && audio_index < 0)
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audio_index = i;
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}
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@ -720,12 +721,14 @@ void VideoState::deinit()
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this->video_thread.reset();
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}
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if(this->audio_st)
|
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|
|
avcodec_close((*this->audio_st)->codec);
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|
if(this->audio_ctx)
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avcodec_free_context(&this->audio_ctx);
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|
this->audio_st = NULL;
|
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|
|
if(this->video_st)
|
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|
avcodec_close((*this->video_st)->codec);
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|
this->audio_ctx = NULL;
|
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|
|
if(this->video_ctx)
|
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|
|
avcodec_free_context(&this->video_ctx);
|
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|
|
this->video_st = NULL;
|
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|
|
this->video_ctx = NULL;
|
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|
if(this->sws_context)
|
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|
|
sws_freeContext(this->sws_context);
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Andrei Kortunov
6 years ago