Previously, the Developer Documentation
<ffmpeg.org/developer.html> contained a single chapter,
1. Developer Guide, with all content under that single
chapter. Thus the document structure was one level deeper
and more complicated than it needed to be.  It differed
from similar documents such as /faq.html, which have
multiple chapters.

Also, the Developer Documentation had instructions to
subscribe to the ffmpeg-cvslog email list. But that is
no longer accurate. For the purposes in this section --
review of patches, discussion of development issues --
ffmpeg_devel is the appropriate email list.

1. Eliminate the single chapter, and promote each section
underneath to chapter, and each subsection to section.
Thus content and relative structure remains the same,
but the overall structure is simpler.  Anchors within the
page remain the same.

2. Change ffmpeg-cvslog to ffmpeg-devel, and rewrite the
wording of that section to match the current usage of
ffmpeg-devel and to flow smoothly.

I believe there were no links to the eliminated "Developer
Documentation" chapter, based on a search of the source
code.

There are a lot of improvements possible to the
Developer Documentation page, beyond this refactoring.
However, making those improvements is a much bigger
and more difficult task.  This change is "low hanging
fruit".

Signed-off-by: Jim DeLaHunt <from.ffmpeg-...@jdlh.com>
---
 doc/developer.texi | 69 +++++++++++++++++++++++++++++-------------------------
 1 file changed, 37 insertions(+), 32 deletions(-)

diff --git a/doc/developer.texi b/doc/developer.texi
index a7b4f1d737..9ac825ea5d 100644
--- a/doc/developer.texi
+++ b/doc/developer.texi
@@ -10,9 +10,7 @@
 
 @contents
 
-@chapter Developers Guide
-
-@section Notes for external developers
+@chapter Notes for external developers
 
 This document is mostly useful for internal FFmpeg developers.
 External developers who need to use the API in their application should
@@ -30,7 +28,7 @@ For more detailed legal information about the use of FFmpeg in
 external programs read the @file{LICENSE} file in the source tree and
 consult @url{https://ffmpeg.org/legal.html}.
 
-@section Contributing
+@chapter Contributing
 
 There are 3 ways by which code gets into FFmpeg.
 @itemize @bullet
@@ -47,9 +45,9 @@ The developer making the commit and the author are 
responsible for their changes
 and should try to fix issues their commit causes.
 
 @anchor{Coding Rules}
-@section Coding Rules
+@chapter Coding Rules
 
-@subsection Code formatting conventions
+@section Code formatting conventions
 
 There are the following guidelines regarding the indentation in files:
 
@@ -74,7 +72,7 @@ The presentation is one inspired by 'indent -i4 -kr -nut'.
 The main priority in FFmpeg is simplicity and small code size in order to
 minimize the bug count.
 
-@subsection Comments
+@section Comments
 Use the JavaDoc/Doxygen  format (see examples below) so that code documentation
 can be generated automatically. All nontrivial functions should have a comment
 above them explaining what the function does, even if it is just one sentence.
@@ -114,7 +112,7 @@ int myfunc(int my_parameter)
 ...
 @end example
 
-@subsection C language features
+@section C language features
 
 FFmpeg is programmed in the ISO C90 language with a few additional
 features from ISO C99, namely:
@@ -160,7 +158,7 @@ mixing statements and declarations;
 GCC statement expressions (@samp{(x = (@{ int y = 4; y; @})}).
 @end itemize
 
-@subsection Naming conventions
+@section Naming conventions
 All names should be composed with underscores (_), not CamelCase. For example,
 @samp{avfilter_get_video_buffer} is an acceptable function name and
 @samp{AVFilterGetVideo} is not. The exception from this are type names, like
@@ -204,7 +202,7 @@ letter as they are reserved by the C standard. Names 
starting with @code{_}
 are reserved at the file level and may not be used for externally visible
 symbols. If in doubt, just avoid names starting with @code{_} altogether.
 
-@subsection Miscellaneous conventions
+@section Miscellaneous conventions
 
 @itemize @bullet
 @item
@@ -216,7 +214,7 @@ Casts should be used only when necessary. Unneeded 
parentheses
 should also be avoided if they don't make the code easier to understand.
 @end itemize
 
-@subsection Editor configuration
+@section Editor configuration
 In order to configure Vim to follow FFmpeg formatting conventions, paste
 the following snippet into your @file{.vimrc}:
 @example
@@ -249,9 +247,9 @@ For Emacs, add these roughly equivalent lines to your 
@file{.emacs.d/init.el}:
 (setq c-default-style "ffmpeg")
 @end lisp
 
-@section Development Policy
+@chapter Development Policy
 
-@subsection Patches/Committing
+@section Patches/Committing
 @subheading Licenses for patches must be compatible with FFmpeg.
 Contributions should be licensed under the
 @uref{http://www.gnu.org/licenses/lgpl-2.1.html, LGPL 2.1},
@@ -350,7 +348,7 @@ time-frame (12h for build failures and security fixes, 3 
days small changes,
 1 week for big patches) then commit your patch if you think it is OK.
 Also note, the maintainer can simply ask for more time to review!
 
-@subsection Code
+@section Code
 @subheading API/ABI changes should be discussed before they are made.
 Do not change behavior of the programs (renaming options etc) or public
 API or ABI without first discussing it on the ffmpeg-devel mailing list.
@@ -381,12 +379,19 @@ Never write to unallocated memory, never write over the 
end of arrays,
 always check values read from some untrusted source before using them
 as array index or other risky things.
 
-@subsection Documentation/Other
-@subheading Subscribe to the ffmpeg-cvslog mailing list.
-It is important to do this as the diffs of all commits are sent there and
-reviewed by all the other developers. Bugs and possible improvements or
-general questions regarding commits are discussed there. We expect you to
-react if problems with your code are uncovered.
+@section Documentation/Other
+@subheading Subscribe to the ffmpeg-devel mailing list.
+It is important to be subscribed to the 
+@uref{https://lists.ffmpeg.org/mailman/listinfo/ffmpeg-devel, ffmpeg-devel}
+mailing list, because any patch you contribute must be sent there 
+and reviewed by the other developers. They may have comments about your 
+contribution. We expect you see those comments, and to improve your 
contribution
+if requested.
+Also, this list is where bugs and possible improvements or
+general questions regarding commits are discussed. That may be helpful
+information as you write your contribution. Finally, by being a list
+subscriber your contribution will be posted immediately to the list,
+without the moderation hold which messages from non-subscribers experience. 
 
 @subheading Keep the documentation up to date.
 Update the documentation if you change behavior or add features. If you are
@@ -406,7 +411,7 @@ finding a new maintainer and also don't forget to update 
the @file{MAINTAINERS}
 
 We think our rules are not too hard. If you have comments, contact us.
 
-@section Code of conduct
+@chapter Code of conduct
 
 Be friendly and respectful towards others and third parties.
 Treat others the way you yourself want to be treated.
@@ -436,7 +441,7 @@ Finally, keep in mind the immortal words of Bill and Ted,
 "Be excellent to each other."
 
 @anchor{Submitting patches}
-@section Submitting patches
+@chapter Submitting patches
 
 First, read the @ref{Coding Rules} above if you did not yet, in particular
 the rules regarding patch submission.
@@ -485,7 +490,7 @@ Give us a few days to react. But if some time passes 
without reaction,
 send a reminder by email. Your patch should eventually be dealt with.
 
 
-@section New codecs or formats checklist
+@chapter New codecs or formats checklist
 
 @enumerate
 @item
@@ -537,7 +542,7 @@ Did you make sure it compiles standalone, i.e. with
 @end enumerate
 
 
-@section patch submission checklist
+@chapter patch submission checklist
 
 @enumerate
 @item
@@ -650,7 +655,7 @@ Test your code with valgrind and or Address Sanitizer to 
ensure it's free
 of leaks, out of array accesses, etc.
 @end enumerate
 
-@section Patch review process
+@chapter Patch review process
 
 All patches posted to ffmpeg-devel will be reviewed, unless they contain a
 clear note that the patch is not for the git master branch.
@@ -681,7 +686,7 @@ to be reviewed, please consider helping to review other 
patches, that is a great
 way to get everyone's patches reviewed sooner.
 
 @anchor{Regression tests}
-@section Regression tests
+@chapter Regression tests
 
 Before submitting a patch (or committing to the repository), you should at 
least
 test that you did not break anything.
@@ -692,7 +697,7 @@ Running 'make fate' accomplishes this, please see 
@url{fate.html} for details.
 this case, the reference results of the regression tests shall be modified
 accordingly].
 
-@subsection Adding files to the fate-suite dataset
+@section Adding files to the fate-suite dataset
 
 When there is no muxer or encoder available to generate test media for a
 specific test then the media has to be included in the fate-suite.
@@ -703,7 +708,7 @@ Once you have a working fate test and fate sample, provide 
in the commit
 message or introductory message for the patch series that you post to
 the ffmpeg-devel mailing list, a direct link to download the sample media.
 
-@subsection Visualizing Test Coverage
+@section Visualizing Test Coverage
 
 The FFmpeg build system allows visualizing the test coverage in an easy
 manner with the coverage tools @code{gcov}/@code{lcov}.  This involves
@@ -730,7 +735,7 @@ You can use the command @code{make lcov-reset} to reset the 
coverage
 measurements. You will need to rerun @code{make lcov} after running a
 new test.
 
-@subsection Using Valgrind
+@section Using Valgrind
 
 The configure script provides a shortcut for using valgrind to spot bugs
 related to memory handling. Just add the option
@@ -744,7 +749,7 @@ In case you need finer control over how valgrind is 
invoked, use the
 your configure line instead.
 
 @anchor{Release process}
-@section Release process
+@chapter Release process
 
 FFmpeg maintains a set of @strong{release branches}, which are the
 recommended deliverable for system integrators and distributors (such as
@@ -776,7 +781,7 @@ adjustments to the symbol versioning file. Please discuss 
such changes
 on the @strong{ffmpeg-devel} mailing list in time to allow forward planning.
 
 @anchor{Criteria for Point Releases}
-@subsection Criteria for Point Releases
+@section Criteria for Point Releases
 
 Changes that match the following criteria are valid candidates for
 inclusion into a point release:
@@ -800,7 +805,7 @@ point releases of the same release branch.
 The order for checking the rules is (1 OR 2 OR 3) AND 4.
 
 
-@subsection Release Checklist
+@section Release Checklist
 
 The release process involves the following steps:
 
-- 
2.12.2

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