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• Ffmpeg AVAudioFifo memory leak

  10 août 2020, par Expressingx

  I'm encoding audio to AAC with encoder. Because it requires I'm using AVAudioFifo following https://ffmpeg.org/doxygen/4.0/transcode_aac_8c-example.html

  


  Everything works, but I can see my memory slowly growing up. If I comment out PushToFifo() no memory leaks. And not sure why. I've profiled the app with ANTS Profiler and I can see a lot of unmanaged memory allocated by avutil-x.dll.

  


  while (ffmpeg.av_read_frame(_inputContext.InputFormatContext, pkt) >= 0)
{
   // decode
   int ret = ffmpeg.avcodec_send_packet(decCtx, pkt);

        if (ret < 0)
        {
            ffmpeg.av_packet_unref(pkt);
            return;
        }

        while (ret >= 0)
        {
            ret = ffmpeg.avcodec_receive_frame(decCtx, frame);

            if (ret == ffmpeg.AVERROR(ffmpeg.EAGAIN) || ret == ffmpeg.AVERROR_EOF)
            {
                return;
            }
            
            // push to fifo
            PushToFifo();
            TryFlushSamples();
        }
}


  


  PushToFifo()

  


              byte* samples = null;

            if (ffmpeg.av_samples_alloc(&samples, null, _outputContext->channels, inputFrame->nb_samples, _outputContext->sample_fmt, 0) < 0)
            {
              ffmpeg.av_freep(&samples[0]);
              ffmpeg.av_free(samples);
              // throw
            }

            if (ffmpeg.swr_convert(_resamplerCtx, &samples, inputFrame->nb_samples, inputFrame->extended_data, inputFrame->nb_samples) < 0)
            {
              throw new Exception();
            }

            if (ffmpeg.av_audio_fifo_realloc(AudioFifo, ffmpeg.av_audio_fifo_size(AudioFifo) + inputFrame->nb_samples) < 0)
            {
              throw new Exception();
            }

            if (ffmpeg.av_audio_fifo_write(AudioFifo, (void**)&samples, inputFrame->nb_samples) < 0)
            {
               throw new Exception();
            }


  


  And in TryFlushSamples();

  


          while (ffmpeg.av_audio_fifo_size(_audioFifo.AudioFifo) >= _outputContext.AudioEncodeContext->frame_size)
        {
            int fifoSize = ffmpeg.av_audio_fifo_size(_audioFifo.AudioFifo);
            int frameSize = fifoSize > _outputContext.AudioEncodeContext->frame_size
                ? _outputContext.AudioEncodeContext->frame_size
                : fifoSize;

            var outputContext = _outputContext.AudioEncodeContext;
            var frame = ffmpeg.av_frame_alloc();
            frame->nb_samples = frameSize;
            frame->channel_layout = outputContext->channel_layout;
            frame->format = (int)outputContext->sample_fmt;
            frame->sample_rate = outputContext->sample_rate;

            if (ffmpeg.av_frame_get_buffer(frame, 0) < 0)
                ffmpeg.av_frame_free(&frame);

            // read frame
            if (ffmpeg.av_audio_fifo_read(_audioFifo.AudioFifo, (void**)&frame->data, frameSize) < frameSize)
            {
                ffmpeg.av_frame_free(&frame);
                return;
            }

            frame->pts = _audioFrameCount;
            _audioFrameCount += frame->nb_samples;

            // send to encoder 

            ffmpeg.av_frame_free(&frame);
        }


  


• Discord BOT Music player : plays 3 songs at once

  15 août 2020, par LaCalienta

  I am developing my Discord bot that plays music, I am using DSahrpPlus as a wrapper and got the bot mostly working

  


  Commands get parsed corecly

  


  using System;
using System.Diagnostics;
using System.IO;
using System.Threading.Tasks;

using DSharpPlus;
using DSharpPlus.CommandsNext;
using DSharpPlus.CommandsNext.Attributes;
using DSharpPlus.Entities;
using DSharpPlus.VoiceNext;

using WolfBot.Attributes;
using WolfBot.Commands.Music;

namespace WolfBot.Commands
{
    class MusicCommands : BaseCommandModule
    {
        int SongID = 1;
        MusicPlayer player;
        [Command("join")]
        [RequirePermissionsCustom(Permissions.UseVoice)]
        public async Task Join(CommandContext ctx)
        {
            //Initialize music player
            player = new MusicPlayer(ctx);

            var vnext = ctx.Client.GetVoiceNext();

            var vnc = vnext.GetConnection(ctx.Guild);
            if (vnc != null)
            {
                await ctx.RespondAsync("Already connected in this guild.");
                throw new InvalidOperationException("Already connected in this guild.");
            }

            var chn = ctx.Member?.VoiceState?.Channel;
            if (chn == null)
            {
                await ctx.RespondAsync("You need to be in a voice channel.");
                throw new InvalidOperationException("You need to be in a voice channel.");
            }

            vnc = await vnext.ConnectAsync(chn);
            await ctx.RespondAsync(DiscordEmoji.FromName(ctx.Client, ":ok_hand:")); //-

• Piwik is expanding ! We’re seeking a talented Software Engineer in New Zealand or in Poland

  13 mai 2014, par Matthieu Aubry — About, Community

  At Piwik and Piwik PRO we develop the leading open source web analytics platform, used by more than one million websites worldwide. Our vision is to build the best open alternative to Google Universal Analytics.

  The Piwik platform collects, stores and processes a lot of information : hundreds of millions of data points each month. We create intuitive, simple and beautiful reports that delight our users.

  Are you seeking a new challenge ? We are currently looking for a software engineer or software developer who is passionate about data processing, security, privacy, the open source philosophy and usable interface design.

  We practise agile methodology, test driven development, and fast release cycles. The main technologies we work with are Javascript (AngularJS, jquery), PHP5 and MySQL. You will write open source code that will directly benefit 250,000+ Piwik users in more than 200 countries and 50 languages.

  Responsibilities

  • Write server-side code (PHP5) and front-end code (Javascript) for Piwik platform.
  • Create robust high-volume production applications and develop prototypes quickly.
  • Tackle new problems as we continue to push technology forward.

  Minimum qualifications

  • BA/BS degree in Computer Science or equivalent practical experience.
  • 2 years of relevant work experience in software development.
  • Understanding of, and practical experience with PHP5 and Javascript application development.
  • Strong analytical and coding skills.
  • Excellent communication skills.

  Location

  • Wellington central, New Zealand.
    If you are not in New Zealand, and you are the right candidate, we will help you relocate here !
  • Wrocław, Poland

  Apply online

  To apply for this position, please Apply online here. We look forward to receiving your applications !