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| author | Claudio Freire <klaussfreire@gmail.com> | 2015-09-23 02:13:56 -0300 |
|---|---|---|
| committer | Claudio Freire <klaussfreire@gmail.com> | 2015-09-23 02:33:44 -0300 |
| commit | 7ec74ae4aaf50507c5da3dfbb7336e15f848b99b (patch) | |
| tree | 2ff0ca4d23f852a61fc47c006b3cf2419eb48ba7 /libavcodec/aacenc.h | |
| parent | b01f3ddad31aba45254dfd553447c7952f86fd31 (diff) | |
| download | ffmpeg-7ec74ae4aaf50507c5da3dfbb7336e15f848b99b.tar.gz | |
AAC encoder: tweak rate-distortion logic
This patch modifies the encode frame function to
retry encoding the frame when the resulting bit count
is too far off target, but only adjusting lambda
in small, incremental step. It also makes the logic
more conservative - otherwise it will contend with
bit reservoir-related variations in bit allocation,
and result in artifacts when frame have to be truncated
(usually at high bit rates transitioning from low
complexity to high complexity).
Diffstat (limited to 'libavcodec/aacenc.h')
| -rw-r--r-- | libavcodec/aacenc.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libavcodec/aacenc.h b/libavcodec/aacenc.h index 54951f9f70..7e7609b1a8 100644 --- a/libavcodec/aacenc.h +++ b/libavcodec/aacenc.h @@ -96,10 +96,12 @@ typedef struct AACEncContext { FFPsyContext psy; struct FFPsyPreprocessContext* psypp; AACCoefficientsEncoder *coder; - int cur_channel; + int cur_channel; ///< current channel for coder context int last_frame; int random_state; float lambda; + enum RawDataBlockType cur_type; ///< channel group type cur_channel belongs to + AudioFrameQueue afq; DECLARE_ALIGNED(16, int, qcoefs)[96]; ///< quantized coefficients DECLARE_ALIGNED(32, float, scoefs)[1024]; ///< scaled coefficients |