mirror of
https://github.com/kasmtech/KasmVNC.git
synced 2025-07-30 12:21:42 +02:00
123 lines
4.2 KiB
C++
123 lines
4.2 KiB
C++
/* Copyright (C) 2025 Kasm Web
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#include "benchmark.h"
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#include <string>
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#include <stdexcept>
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#include <rfb/LogWriter.h>
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#include "VNCServer.h"
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static rfb::LogWriter vlog("Benchmarking");
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void benchmark(const std::string &path) {
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AVFormatContext *format_ctx = nullptr;
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if (avformat_open_input(&format_ctx, path.c_str(), nullptr, nullptr) < 0)
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throw std::runtime_error("Could not open video file");
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FormatCtxGuard format_ctx_guard{format_ctx};
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// Find stream info
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if (avformat_find_stream_info(format_ctx, nullptr) < 0)
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throw std::runtime_error("Could not find stream info");
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// Find video stream
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int video_stream_idx = -1;
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for (uint32_t i = 0; i < format_ctx->nb_streams; ++i) {
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if (format_ctx->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
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video_stream_idx = static_cast<int>(i);
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break;
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}
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}
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if (video_stream_idx == -1)
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throw std::runtime_error("No video stream found");
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// Get codec parameters and decoder
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const auto *codec_parameters = format_ctx->streams[video_stream_idx]->codecpar;
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const auto *codec = avcodec_find_decoder(codec_parameters->codec_id);
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if (!codec)
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throw std::runtime_error("Codec not found");
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CodecCtxGuard codex_ctx_guard{avcodec_alloc_context3(codec)};
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auto *codec_ctx = codex_ctx_guard.get();
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if (!codec_ctx || avcodec_parameters_to_context(codec_ctx, codec_parameters) < 0)
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throw std::runtime_error("Failed to set up codec context");
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if (avcodec_open2(codec_ctx, codec, nullptr) < 0)
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throw std::runtime_error("Could not open codec");
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// Allocate frame and packet
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FrameGuard frame_guard{av_frame_alloc()};
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auto *frame = frame_guard.get();
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PacketGuard packet_guard{av_packet_alloc()};
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auto *packet = packet_guard.get();
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if (!frame || !packet)
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throw std::runtime_error("Could not allocate frame or packet");
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// Scaling context to convert to RGB24
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SwsContext *sws_ctx = sws_getContext(
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codec_ctx->width, codec_ctx->height, codec_ctx->pix_fmt,
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codec_ctx->width, codec_ctx->height, AV_PIX_FMT_RGB24,
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SWS_BILINEAR, nullptr, nullptr, nullptr
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);
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if (!sws_ctx)
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throw std::runtime_error("Could not create scaling context");
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SwsContextGuard sws_ctx_guard{sws_ctx};
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FrameGuard rgb_frame_guard{av_frame_alloc()};
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auto *rgb_frame = rgb_frame_guard.get();
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if (!rgb_frame)
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throw std::runtime_error("Could not allocate frame");
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rgb_frame->format = AV_PIX_FMT_RGB24;
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rgb_frame->width = codec_ctx->width;
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rgb_frame->height = codec_ctx->height;
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static const rfb::PixelFormat pf{32, 24, false, true, 0xFF, 0xFF, 0xFF, 0, 8, 16};
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const rfb::Rect rect{0, 0, rgb_frame->width, rgb_frame->height};
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rfb::ManagedPixelBuffer pb{pf, rect.width(), rect.height()};
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server->setPixelBuffer(&pb);
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if (av_frame_get_buffer(rgb_frame, 0) != 0)
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throw std::runtime_error("Could not allocate frame data");
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while (av_read_frame(format_ctx, packet) == 0) {
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if (packet->stream_index == video_stream_idx) {
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if (avcodec_send_packet(codec_ctx, packet) == 0) {
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while (avcodec_receive_frame(codec_ctx, frame) == 0) {
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// Convert to RGB
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sws_scale(sws_ctx, frame->data, frame->linesize, 0, frame->height,
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rgb_frame->data, rgb_frame->linesize);
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pb.imageRect(rect, rgb_frame->data[0], rect.width());
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}
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}
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}
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av_packet_unref(packet);
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}
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}
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