[FFmpeg-devel] [PATCH] Add asrc abuffer - audio source buffer for lavfi

[S.N. Hemanth Meenakshisundaram]

 Fixed asrc_abuffer to call get_audio_buffer_ref with the buffer given
to it by ffmpeg.c. Thus there's no memcpy.

asrc_abuffer also supplies a function buf_free that will only free the
AVFilterBuffer struct and leave the actual buffer to be freed by
ffmpeg.c or any other client using this filter.

Tested with ffmpeg.c changes that will follow in a separate patch,
passes make test and valgrind.

Also, the sample format and channel layout can be supplied during init
of this filter as either a number or a string.


---
 doc/filters.texi           |   51 +++++++++++++
 libavfilter/Makefile       |    2 +
 libavfilter/allfilters.c   |    2 +
 libavfilter/asrc_abuffer.c |  168 ++++++++++++++++++++++++++++++++++++++++++++
 libavfilter/asrc_abuffer.h |   24 ++++++
 5 files changed, 247 insertions(+), 0 deletions(-)
 create mode 100644 libavfilter/asrc_abuffer.c
 create mode 100644 libavfilter/asrc_abuffer.h



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