diff options
author | Ronald S. Bultje <rsbultje@gmail.com> | 2014-05-27 16:39:12 +0400 |
---|---|---|
committer | Michael Niedermayer <michaelni@gmx.at> | 2014-06-02 17:06:24 +0400 |
commit | cdfd9717edac118968e63e6f83c3e45a7e337833 (patch) | |
tree | 7e3a0b8f80e11182ccb6b459168f2d235d672d27 /libswresample/resample_template.c | |
parent | bfb3ed1a9d5dafdc185080fdd88d02ff7221d30a (diff) |
swr: move compensation_distance handling to swri_resample caller.
I think there's an off-by-one in terms of the switchpoint where we
switch from dst_incr to ideal_dst_incr, I don't think that's a massive
issue, but just be aware of that. It's probably trivial to prevent but
I don't care.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
I could not reproduce any off by 1 error, results are bit exact (michael)
Diffstat (limited to 'libswresample/resample_template.c')
-rw-r--r-- | libswresample/resample_template.c | 18 |
1 files changed, 2 insertions, 16 deletions
diff --git a/libswresample/resample_template.c b/libswresample/resample_template.c index bb36e65c17..5151f585fc 100644 --- a/libswresample/resample_template.c +++ b/libswresample/resample_template.c @@ -112,12 +112,11 @@ int RENAME(swri_resample)(ResampleContext *c, DELEM *dst, const DELEM *src, int int frac= c->frac; int dst_incr_frac= c->dst_incr % c->src_incr; int dst_incr= c->dst_incr / c->src_incr; - int compensation_distance= c->compensation_distance; av_assert1(c->filter_shift == FILTER_SHIFT); av_assert1(c->felem_size == sizeof(FELEM)); - if(compensation_distance == 0 && c->filter_length == 1 && c->phase_shift==0){ + if (c->filter_length == 1 && c->phase_shift == 0) { int64_t index2= (1LL<<32)*c->frac/c->src_incr + (1LL<<32)*index; int64_t incr= (1LL<<32) * c->dst_incr / c->src_incr; int new_size = (src_size * (int64_t)c->src_incr - frac + c->dst_incr - 1) / c->dst_incr; @@ -134,8 +133,7 @@ int RENAME(swri_resample)(ResampleContext *c, DELEM *dst, const DELEM *src, int av_assert2(index >= 0); *consumed= index; index = 0; - } else if (compensation_distance == 0 && - index >= 0 && + } else if (index >= 0 && src_size*(int64_t)c->src_incr < (INT64_MAX >> (c->phase_shift+1))) { int64_t end_index = (1LL + src_size - c->filter_length) << c->phase_shift; int64_t delta_frac = (end_index - index) * c->src_incr - c->frac; @@ -243,27 +241,15 @@ int RENAME(swri_resample)(ResampleContext *c, DELEM *dst, const DELEM *src, int frac -= c->src_incr; index++; } - - if(dst_index + 1 == compensation_distance){ - compensation_distance= 0; - dst_incr_frac= c->ideal_dst_incr % c->src_incr; - dst_incr= c->ideal_dst_incr / c->src_incr; - } } *consumed= FFMAX(sample_index, 0); index += FFMIN(sample_index, 0) << c->phase_shift; - - if(compensation_distance){ - compensation_distance -= dst_index; - av_assert1(compensation_distance > 0); - } } if(update_ctx){ c->frac= frac; c->index= index; c->dst_incr= dst_incr_frac + c->src_incr*dst_incr; - c->compensation_distance= compensation_distance; } return dst_index; |