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Add videostreaming as an alternative to JPEG streaming to RocketsPlugin
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,219 @@ | ||
| /* Copyright (c) 2019 EPFL/Blue Brain Project | ||
| * All rights reserved. Do not distribute without permission. | ||
| * | ||
| * This file is part of Brayns <https://github.com/BlueBrain/Brayns> | ||
| * | ||
| * This library is free software; you can redistribute it and/or modify it under | ||
| * the terms of the GNU Lesser General Public License version 3.0 as published | ||
| * by the Free Software Foundation. | ||
| * | ||
| * 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 "encoder.h" | ||
|
|
||
| #include <brayns/common/log.h> | ||
| #include <brayns/engine/FrameBuffer.h> | ||
|
|
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| int custom_io_write(void *opaque, uint8_t *buffer, int32_t buffer_size) | ||
| { | ||
| auto encoder = (brayns::Encoder *)opaque; | ||
| encoder->_dataFunc((const char *)buffer, buffer_size); | ||
| return buffer_size; | ||
| } | ||
|
|
||
| namespace brayns | ||
| { | ||
| Encoder::Encoder(const int width_, const int height_, const int fps, | ||
| const int64_t kbps, const DataFunc &dataFunc) | ||
| : _dataFunc(dataFunc) | ||
| , width(width_) | ||
| , height(height_) | ||
| , _fps(fps) | ||
| { | ||
| #ifndef FF_API_NEXT | ||
| av_register_all(); | ||
| #endif | ||
| formatContext = avformat_alloc_context(); | ||
| formatContext->oformat = av_guess_format("mp4", nullptr, nullptr); | ||
| formatContext->flags = AVFMT_FLAG_CUSTOM_IO; | ||
|
|
||
| const AVCodecID codecID = AV_CODEC_ID_H264; | ||
| codec = avcodec_find_encoder(codecID); | ||
| if (!codec) | ||
| BRAYNS_THROW( | ||
| std::runtime_error(std::string("Could not find encoder for ") + | ||
| avcodec_get_name(codecID))); | ||
|
|
||
| if (!(stream = avformat_new_stream(formatContext, codec))) | ||
| BRAYNS_THROW(std::runtime_error("Could not create stream")); | ||
|
|
||
| const AVRational avFPS = {fps, 1}; | ||
| stream->avg_frame_rate = avFPS; | ||
| stream->time_base = av_inv_q(avFPS); | ||
|
|
||
| #pragma GCC diagnostic push | ||
| #pragma GCC diagnostic ignored "-Wdeprecated-declarations" | ||
| codecContext = stream->codec; | ||
| #pragma GCC diagnostic pop | ||
| codecContext->codec_tag = 0; | ||
| codecContext->codec_id = codecID; | ||
| codecContext->codec_type = AVMEDIA_TYPE_VIDEO; | ||
| codecContext->width = width; | ||
| codecContext->height = height; | ||
| codecContext->gop_size = 0; | ||
| codecContext->pix_fmt = AV_PIX_FMT_YUV420P; | ||
| codecContext->framerate = avFPS; | ||
| codecContext->time_base = av_inv_q(avFPS); | ||
| codecContext->bit_rate = kbps * 1000; | ||
| codecContext->max_b_frames = 0; | ||
| codecContext->flags |= AV_CODEC_FLAG_GLOBAL_HEADER; | ||
|
|
||
| codecContext->profile = 100; | ||
| codecContext->level = 31; | ||
|
|
||
| av_opt_set(codecContext->priv_data, "crf", "12", 0); | ||
| av_opt_set(codecContext->priv_data, "preset", "ultrafast", 0); | ||
| // av_opt_set(codecContext->priv_data, "profile", "main", 0); | ||
| av_opt_set(codecContext->priv_data, "tune", "zerolatency", 0); | ||
|
|
||
| if (avcodec_open2(codecContext, codec, NULL) < 0) | ||
| BRAYNS_THROW(std::runtime_error("Could not open video encoder!")); | ||
|
|
||
| int avio_buffer_size = 1 * 1024 * 1024; | ||
| void *avio_buffer = av_malloc(avio_buffer_size); | ||
|
|
||
| AVIOContext *custom_io = | ||
| avio_alloc_context((unsigned char *)avio_buffer, avio_buffer_size, 1, | ||
| (void *)this, NULL, &custom_io_write, NULL); | ||
|
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| formatContext->pb = custom_io; | ||
|
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| AVDictionary *fmt_opts = NULL; | ||
| av_dict_set(&fmt_opts, "brand", "mp42", 0); | ||
| av_dict_set(&fmt_opts, "movflags", "faststart+frag_keyframe+empty_moov", 0); | ||
| av_dict_set(&fmt_opts, "live", "1", 0); | ||
| if (avformat_write_header(formatContext, &fmt_opts) < 0) | ||
| BRAYNS_THROW(std::runtime_error("Could not write header!")); | ||
|
|
||
| picture.init(codecContext->pix_fmt, width, height); | ||
|
|
||
| if (_async) | ||
| _thread = std::thread(std::bind(&Encoder::_runAsync, this)); | ||
|
|
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| _timer.start(); | ||
| } | ||
|
|
||
| Encoder::~Encoder() | ||
| { | ||
| if (_async) | ||
| { | ||
| _running = false; | ||
| _queue.push(-1); | ||
| _thread.join(); | ||
| } | ||
|
|
||
| if (formatContext) | ||
| { | ||
| av_write_trailer(formatContext); | ||
| av_free(formatContext->pb); | ||
| avcodec_close(codecContext); | ||
| avformat_free_context(formatContext); | ||
| } | ||
| } | ||
|
|
||
| void Encoder::encode(FrameBuffer &fb) | ||
| { | ||
| if (_async && _queue.size() == 2) | ||
| return; | ||
|
|
||
| fb.map(); | ||
| auto cdata = reinterpret_cast<const uint8_t *const>(fb.getColorBuffer()); | ||
| if (_async) | ||
| { | ||
| auto &image = _image[_currentImage]; | ||
| image.width = fb.getSize().x; | ||
| image.height = fb.getSize().y; | ||
| const auto bufferSize = image.width * image.height * fb.getColorDepth(); | ||
|
|
||
| if (image.data.size() < bufferSize) | ||
| image.data.resize(bufferSize); | ||
| memcpy(image.data.data(), cdata, bufferSize); | ||
| _queue.push(_currentImage); | ||
| _currentImage = _currentImage == 0 ? 1 : 0; | ||
| fb.unmap(); | ||
| return; | ||
| } | ||
|
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| _toPicture(cdata, fb.getSize().x, fb.getSize().y); | ||
| fb.unmap(); | ||
|
|
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| _encode(); | ||
| } | ||
|
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||
| void Encoder::_encode() | ||
| { | ||
| const auto elapsed = _timer.elapsed() + _leftover; | ||
| const auto duration = 1.0 / _fps; | ||
| if (elapsed < duration) | ||
| return; | ||
|
|
||
| _leftover = elapsed - duration; | ||
| for (; _leftover > duration;) | ||
| _leftover -= duration; | ||
|
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| picture.frame->pts = _frameNumber++; | ||
|
|
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| if (avcodec_send_frame(codecContext, picture.frame) < 0) | ||
| return; | ||
|
|
||
| AVPacket pkt; | ||
| av_init_packet(&pkt); | ||
| const auto ret = avcodec_receive_packet(codecContext, &pkt); | ||
| if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) | ||
| { | ||
| av_packet_unref(&pkt); | ||
| return; | ||
| } | ||
|
|
||
| av_packet_rescale_ts(&pkt, codecContext->time_base, stream->time_base); | ||
| pkt.stream_index = stream->index; | ||
| av_interleaved_write_frame(formatContext, &pkt); | ||
|
|
||
| _timer.start(); | ||
| } | ||
|
|
||
| void Encoder::_runAsync() | ||
| { | ||
| while (_running) | ||
| { | ||
| auto idx = _queue.pop(); | ||
| if (idx < 0) | ||
| break; | ||
|
|
||
| auto &image = _image[idx]; | ||
|
|
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| _toPicture(image.data.data(), image.width, image.height); | ||
| _encode(); | ||
| } | ||
| } | ||
|
|
||
| void Encoder::_toPicture(const uint8_t *const data, const int width_, | ||
| const int height_) | ||
| { | ||
| sws_context = | ||
| sws_getCachedContext(sws_context, width_, height_, AV_PIX_FMT_RGBA, | ||
| width, height, AV_PIX_FMT_YUV420P, | ||
| SWS_FAST_BILINEAR, 0, 0, 0); | ||
| const int stride[] = {4 * (int)width_}; | ||
| sws_scale(sws_context, &data, stride, 0, height_, picture.frame->data, | ||
| picture.frame->linesize); | ||
| } | ||
| } |
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