220 26228 <8e15e56a-73e1-452b-a564-b36aead468b8@isocpp.org> article Path: news.gmane.org!not-for-mail From: alexander.zywicki@gmail.com Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Any interest to adding audio support to the std library? Date: Thu, 9 Jun 2016 21:17:17 -0700 (PDT) Lines: 147 Approved: news@gmane.org Message-ID: <8e15e56a-73e1-452b-a564-b36aead468b8@isocpp.org> References: <5751B06A.4080501@mail1.stofanet.dk> <5290948.va25uYNizX@tjmaciei-mobl1> <1580229.cHEgQxCuA1@tjmaciei-mobl1> <62b7649a-5de5-4330-9bac-708375d36e2c@isocpp.org> <3c0fde91-671d-4751-955d-7b04cfa120bc@isocpp.org> <4922d8b8-7909-44a2-a24f-8dcf4090911f@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_1592_2055356127.1465532237846" X-Trace: ger.gmane.org 1465532242 24626 80.91.229.3 (10 Jun 2016 04:17:22 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 10 Jun 2016 04:17:22 +0000 (UTC) Cc: alexander.zywicki@gmail.com, ross.bencina@gmail.com To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBCS7TY6DTQOBBTX65C5AKGQE54QDMBI@isocpp.org Fri Jun 10 06:17:21 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ob0-f200.google.com ([209.85.214.200]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1bBDsm-0005hg-HE for gclcip-std-proposals@m.gmane.org; Fri, 10 Jun 2016 06:17:20 +0200 Original-Received: by mail-ob0-f200.google.com with SMTP id jt9sf32960289obc.2 for ; Thu, 09 Jun 2016 21:17:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:message-id:in-reply-to:references:subject :mime-version:x-original-sender:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=GakxbnHAwggOBR9b2Ypy0bewa4Z7P/k97fW8qI6fdvM=; b=sYtA4E3gGj408psXZI8PFCJ+iiL5iEg5c1Q5bI3SRNj6SRrBGMgGXiy2RaaQbC04iO V9ax/Usf/5nqHJGtIkA1LFKaA+rcd3Tg//sy3uCSaPdI3FmlPY+aMK29ziHED2Mg0Oqz RH3T5v3l2bgu7EpIZyZAoBTngnGRygZY5+t2J7lcJfQsEmrFRaLvXJHA2ZOtvDAShfIC jHIW0w1GRf93XOfKkNLWA3uGxuuqkY/BIcM79bbuZKcBc0ClzmAEhbvWv8SERQtK/psb U8R5jaBwLqXVHm6NlgEy12E7SO8NXdsJP62bY1anmZjxKXxFlqpiuWMX9eQzHHzC55ZX mJog== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:cc:message-id:in-reply-to:references:subject :mime-version:x-original-sender:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=GakxbnHAwggOBR9b2Ypy0bewa4Z7P/k97fW8qI6fdvM=; b=EFWufc3D3QANgMc4gHryRa321zYJDOrC9mI0nkFKUJBWdKOT0sZ99hLXTauXLxcVi/ OAM1bqdxFFgYD6Pbu7pZt2gUMDw+Vc/X5UKCu7a1vdZ3uy9GeeBvTDW+JwSrBfaXo+C4 q7u/X5QbQroMZ6yHJklKGKEybetTulz6+5x+PidhFht55uDfPdjpOSsM5KEHR2i7Qrv/ WxB/ceX4PnfhCLMKGrjis/NKIPa7UXcY8jF4hSdg0cmO8NOPpm0A+IBG89nSOPzyPgKJ z4w5R1GL5vnwQEmPKOQSMLDEwEhr+ZEJS7QZFI5ElVtG6m8cC02WEOOFAG6ASOtOrlN7 PNrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:cc:message-id:in-reply-to :references:subject:mime-version:x-original-sender:reply-to :precedence:mailing-list:list-id:x-spam-checked-in-group:list-post :list-help:list-archive:list-subscribe:list-unsubscribe; bh=GakxbnHAwggOBR9b2Ypy0bewa4Z7P/k97fW8qI6fdvM=; b=i0gqwUfuYS7O+DowCodNnAHK+bJzgRS5vVWJCaJqkl34+Fv2reoBZn88Oh5MOOtgAT GbPp1soOoPBBWJGjjATNDhDpt9GQagonuDG8s7KiR+8ryzHGQWNhiHT8/y9o95u6VOss Hg1GvyejSAav9+GMjjj3KpB677jcpPKBu94Rv/cUjw3mSJij2iYwryTSAui9NwRca6D6 pT0ddZv40cU7+F54QCt7ztn3ftHdudY8p6eSBfxlAcggc9b2ysZdkmAWmP5gZpf7nR7P eStyNZGvwTZshA16y8YT4MKVuv6E6/WZRHKE4BqAnIlkgTWW+Tq74wqkbYI5MiA5GrT3 tyhw== X-Gm-Message-State: ALyK8tLmKLfYVtexSR7vqGUuBFOdqhUbpc5lVDLLyP3+flcnCd4jYpK8bx6VrZZMQgswAQ== X-Received: by 10.107.146.67 with SMTP id u64mr375860iod.29.1465532239563; Thu, 09 Jun 2016 21:17:19 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.107.200.194 with SMTP id y185ls560296iof.57.gmail; Thu, 09 Jun 2016 21:17:18 -0700 (PDT) X-Received: by 10.36.87.195 with SMTP id u186mr8641ita.3.1465532238713; Thu, 09 Jun 2016 21:17:18 -0700 (PDT) In-Reply-To: X-Original-Sender: alexander.zywicki@gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Spam-Checked-In-Group: std-proposals@isocpp.org X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:26228 Archived-At: ------=_Part_1592_2055356127.1465532237846 Content-Type: multipart/alternative; boundary="----=_Part_1593_382233223.1465532237846" ------=_Part_1593_382233223.1465532237846 Content-Type: text/plain; charset=UTF-8 So essentially it is a class that provides the needed data to calculate the time in seconds a number of frames should take at a specified rate? So: int number_of_frames = fend - fstart; double seconds_elapsed = number_of_frames/frate; Am i understanding that correctly? On Thursday, June 9, 2016 at 10:05:08 PM UTC-5, Ron wrote: > > > On Thursday, June 9, 2016 at 7:26:37 PM UTC-7, alexande...@gmail.com > wrote: >> >> Do you have any suggestions as far as an explicit notion of time should >> be in this context? >> > > As a suggestion, something I usually use is a start and end to the buffer > and the rate of the buffer. Basically a class that has a value equal to > the start frame of the given buffer, a value equal to the end frame of the > buffer (or start of next frame) and a value equal to the frame rate. So > you can derive a real for each, like start frames over frame rate and end > frame over frame rate. From that you can get the seconds as a double or > long double. > > class frame_ticks // or some name that better describes this... > { > uint64_t fstart; > uint64_t fend; > uint64_t frate; > // ... > }; > > Allowing the start value to be set or reset on starting or stopping > record/playback is another feature that some might need here. And I > don't recommend eliminating the rate portion from this class since it could > lead to trouble where people are making assumptions they shouldn't, best to > have them together. > > Also, I would not add other data to this class since it could be re-used > elsewhere as is. Other properties of a buffer can be defined in another > class/structure, but again this is just a suggestion... > > -- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an email to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. To view this discussion on the web visit https://groups.google.com/a/isocpp.org/d/msgid/std-proposals/8e15e56a-73e1-452b-a564-b36aead468b8%40isocpp.org. ------=_Part_1593_382233223.1465532237846 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
So essentially it is a class that provides the needed data= to calculate the time in seconds a number of frames should take at a speci= fied rate?

So:
=
int number_of_frames =3D fend - fstar= t;<= span style=3D"color: #000;" class=3D"styled-by-prettify">
double seconds_elapsed =3D number_of_frames/frate;

Am= i understanding that correctly?


On Thursday, June 9, 2016 at 1= 0:05:08 PM UTC-5, Ron wrote:

On Thursday, June 9, 2016 at 7:26:37 PM UTC-7, alexan= de...@gmail.com wrote:
Do you have any suggestions as far as an explicit notion of time s= hould be in this context?

As a suggestion, something I u= sually use is a start and end to the buffer and the rate of the buffer. =C2= =A0Basically a class that has a value equal to the start frame of the given= buffer, a value equal to the end frame of the buffer (or start of next fra= me) and a value equal to the frame rate. =C2=A0So you can derive a real for= each, like start frames over frame rate and end frame over frame rate. =C2= =A0From that you can get the seconds as a double or long double.
class frame_ticks =C2=A0= // or some name that better describes this...
{
=C2=A0 =C2=A0 uint64_t fstart;
=C2=A0 =C2=A0 uint64_t fend;
=C2=A0 =C2=A0 uin= t64_t frate;
=C2=A0 =C2=A0 // ...
};
=

Allowing the start value to be set or reset on starting or stop= ping record/playback is another feature that some might need here. =C2=A0An= d I don= 't recommend eliminating the rate portion from this class since it coul= d lead to trouble where people are making assumptions they shouldn't, b= est to have them together.

Also, I would not add other data to t= his class since it could be re-used elsewhere as is. =C2=A0Other properties= of a buffer can be defined in another class/structure, but again this is j= ust a suggestion...

--
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