| Message ID | 20240326230757.282319-4-asoulier@google.com |
|---|---|
| State | New |
| Headers | show |
| Series | [FFmpeg-devel,1/5] configure: Add option for enabling LC3/LC3plus wrapper | expand |
| Context | Check | Description |
|---|---|---|
| yinshiyou/make_loongarch64 | success | Make finished |
| yinshiyou/make_fate_loongarch64 | success | Make fate finished |
| andriy/make_x86 | success | Make finished |
| andriy/make_fate_x86 | success | Make fate finished |
On date Tuesday 2024-03-26 23:07:56 +0000, ffmpeg-devel Mailing List wrote: > Signed-off-by: Antoine Soulier <asoulier@google.com> > --- > doc/encoders.texi | 57 +++++++++++++++++++++++++++++++++++++++ > doc/general_contents.texi | 11 +++++++- > doc/muxers.texi | 6 +++++ > 3 files changed, 73 insertions(+), 1 deletion(-) > > diff --git a/doc/encoders.texi b/doc/encoders.texi > index 7c223ed74c..0719ba13cc 100644 > --- a/doc/encoders.texi > +++ b/doc/encoders.texi > @@ -814,6 +814,63 @@ ffmpeg -i input.wav -c:a libfdk_aac -profile:a aac_he -b:a 64k output.m4a > @end example > @end itemize > > +@anchor{liblc3-enc} > +@section liblc3 > + > +liblc3 LC3 (Low Complexity Communication Codec) encoder wrapper. > + > +Requires the presence of the liblc3 headers and library during configuration. > +You need to explicitly configure the build with @code{--enable-liblc3}. > + > +This encoder has support for the Bluetooth SIG LC3 codec for the LE Audio > +protocol, and the following features of LC3plus: > +@itemize @minus nit: you can skip @minus (I don't think it's much used in other places) > +@item > +Frame duration of 2.5 and 5ms. > +@item > +High-Resolution mode, 48 KHz, and 96 kHz sampling rates. > +@end itemize > + > +For more information see the liblc3 project at > +@url{https://github.com/google/liblc3}. > + > +@subsection Options > + > +The following options are mapped on the shared FFmpeg codec options. > + > +@table @option > +@item b nit: here and below you can use: @item b @var{bitrate} to clarify the argument content > +Set the bit rate in bits/s. This will determine the fixed size of the encoded > +frames, for a selected frame duration. > + > +@item ar > +Set the audio sampling rate (in Hz). > + > +@item channels > +Set the number of audio channels. > + > +@item frame_duration > +Set the audio frame duration in milliseconds. Default value is 10ms. > +Allowed frame durations are 2.5ms, 5ms, 7.5ms and 10ms. > +LC3 (Bluetooth LE Audio), allows 7.5ms and 10ms; and LC3plus 2.5ms, 5ms > +and 10ms. > + > +The 10ms frame duration is available in LC3 and LC3 plus standard. > +In this mode, the produced bitstream can be referenced either as LC3 or LC3plus. > + > +@item high_resolution in this case it would be @var{bool} > +Enable the high-resolution mode if set to 1. The high-resolution mode is > +available with all LC3plus frame durations and for a sampling rate 48 KHz, something is missing, for a sampling rate _of_ 48 KHz ? > +and 96 KHz. > + > +The encoder automatically turns off this mode at lower sampling rates and > +activates it at 96 KHz. > + > +This mode should be preferred at high bitrates. In this mode, the audio > +bandwidth is always up to the Nyquist frequency, compared to LC3 at 48 KHz, > +which limits the bandwidth to 20 KHz. > +@end table > + > @anchor{libmp3lame} > @section libmp3lame > > diff --git a/doc/general_contents.texi b/doc/general_contents.texi > index f269cbd1a9..e7cf4f8239 100644 > --- a/doc/general_contents.texi > +++ b/doc/general_contents.texi > @@ -237,6 +237,14 @@ Go to @url{http://sourceforge.net/projects/opencore-amr/} and follow the > instructions for installing the library. > Then pass @code{--enable-libfdk-aac} to configure to enable it. > > +@subsection LC3 library > + > +FFmpeg can make use of the Google LC3 library for LC3 decoding & encoding. > + > +Go to @url{https://github.com/google/liblc3/} and follow the instructions for > +installing the library. > +Then pass @code{--enable-liblc3} to configure to enable it. > + > @section OpenH264 > > FFmpeg can make use of the OpenH264 library for H.264 decoding and encoding. > @@ -1300,7 +1308,8 @@ following image formats are supported: > @tab encoding and decoding supported through external library libilbc > @item IMC (Intel Music Coder) @tab @tab X > @item Interplay ACM @tab @tab X > -@item MACE (Macintosh Audio Compression/Expansion) 3:1 @tab @tab X > +@item LC3 @tab E @tab E > + @tab supported through external library liblc3 > @item MACE (Macintosh Audio Compression/Expansion) 6:1 @tab @tab X > @item Marian's A-pac audio @tab @tab X > @item MI-SC4 (Micronas SC-4 Audio) @tab @tab X > diff --git a/doc/muxers.texi b/doc/muxers.texi > index a10a8e216f..9687746c30 100644 > --- a/doc/muxers.texi > +++ b/doc/muxers.texi > @@ -2612,6 +2612,12 @@ WebDAV server every second: > ffmpeg -f x11grab -framerate 1 -i :0.0 -q:v 6 -update 1 -protocol_opts method=PUT http://example.com/desktop.jpg > @end example > > +@section lc3 > +Bluetooth SIG Low Complexity Communication Codec audio (LC3), or > +ETSI TS 103 634 Low Complexity Communication Codec plus (LC3plus). > + > +This muxer accepts a single @code{lc3} audio stream. > + > @section matroska LGTM otherwise, thanks. Note: you might move the doc bits to the relevent functional changes and drop this patch.
diff --git a/doc/encoders.texi b/doc/encoders.texi index 7c223ed74c..0719ba13cc 100644 --- a/doc/encoders.texi +++ b/doc/encoders.texi @@ -814,6 +814,63 @@ ffmpeg -i input.wav -c:a libfdk_aac -profile:a aac_he -b:a 64k output.m4a @end example @end itemize +@anchor{liblc3-enc} +@section liblc3 + +liblc3 LC3 (Low Complexity Communication Codec) encoder wrapper. + +Requires the presence of the liblc3 headers and library during configuration. +You need to explicitly configure the build with @code{--enable-liblc3}. + +This encoder has support for the Bluetooth SIG LC3 codec for the LE Audio +protocol, and the following features of LC3plus: +@itemize @minus +@item +Frame duration of 2.5 and 5ms. +@item +High-Resolution mode, 48 KHz, and 96 kHz sampling rates. +@end itemize + +For more information see the liblc3 project at +@url{https://github.com/google/liblc3}. + +@subsection Options + +The following options are mapped on the shared FFmpeg codec options. + +@table @option +@item b +Set the bit rate in bits/s. This will determine the fixed size of the encoded +frames, for a selected frame duration. + +@item ar +Set the audio sampling rate (in Hz). + +@item channels +Set the number of audio channels. + +@item frame_duration +Set the audio frame duration in milliseconds. Default value is 10ms. +Allowed frame durations are 2.5ms, 5ms, 7.5ms and 10ms. +LC3 (Bluetooth LE Audio), allows 7.5ms and 10ms; and LC3plus 2.5ms, 5ms +and 10ms. + +The 10ms frame duration is available in LC3 and LC3 plus standard. +In this mode, the produced bitstream can be referenced either as LC3 or LC3plus. + +@item high_resolution +Enable the high-resolution mode if set to 1. The high-resolution mode is +available with all LC3plus frame durations and for a sampling rate 48 KHz, +and 96 KHz. + +The encoder automatically turns off this mode at lower sampling rates and +activates it at 96 KHz. + +This mode should be preferred at high bitrates. In this mode, the audio +bandwidth is always up to the Nyquist frequency, compared to LC3 at 48 KHz, +which limits the bandwidth to 20 KHz. +@end table + @anchor{libmp3lame} @section libmp3lame diff --git a/doc/general_contents.texi b/doc/general_contents.texi index f269cbd1a9..e7cf4f8239 100644 --- a/doc/general_contents.texi +++ b/doc/general_contents.texi @@ -237,6 +237,14 @@ Go to @url{http://sourceforge.net/projects/opencore-amr/} and follow the instructions for installing the library. Then pass @code{--enable-libfdk-aac} to configure to enable it. +@subsection LC3 library + +FFmpeg can make use of the Google LC3 library for LC3 decoding & encoding. + +Go to @url{https://github.com/google/liblc3/} and follow the instructions for +installing the library. +Then pass @code{--enable-liblc3} to configure to enable it. + @section OpenH264 FFmpeg can make use of the OpenH264 library for H.264 decoding and encoding. @@ -1300,7 +1308,8 @@ following image formats are supported: @tab encoding and decoding supported through external library libilbc @item IMC (Intel Music Coder) @tab @tab X @item Interplay ACM @tab @tab X -@item MACE (Macintosh Audio Compression/Expansion) 3:1 @tab @tab X +@item LC3 @tab E @tab E + @tab supported through external library liblc3 @item MACE (Macintosh Audio Compression/Expansion) 6:1 @tab @tab X @item Marian's A-pac audio @tab @tab X @item MI-SC4 (Micronas SC-4 Audio) @tab @tab X diff --git a/doc/muxers.texi b/doc/muxers.texi index a10a8e216f..9687746c30 100644 --- a/doc/muxers.texi +++ b/doc/muxers.texi @@ -2612,6 +2612,12 @@ WebDAV server every second: ffmpeg -f x11grab -framerate 1 -i :0.0 -q:v 6 -update 1 -protocol_opts method=PUT http://example.com/desktop.jpg @end example +@section lc3 +Bluetooth SIG Low Complexity Communication Codec audio (LC3), or +ETSI TS 103 634 Low Complexity Communication Codec plus (LC3plus). + +This muxer accepts a single @code{lc3} audio stream. + @section matroska Matroska container muxer.
Signed-off-by: Antoine Soulier <asoulier@google.com> --- doc/encoders.texi | 57 +++++++++++++++++++++++++++++++++++++++ doc/general_contents.texi | 11 +++++++- doc/muxers.texi | 6 +++++ 3 files changed, 73 insertions(+), 1 deletion(-)