Hi!
Attached patch fixes a random testcase for ticket #6785 here but I
don't know if this is the correct fix.
Please review, Carl Eugen
From a93b9309d74f5eadece371ee1e682d266af6cd83 Mon Sep 17 00:00:00 2001
From: Carl Eugen Hoyos <ceffm...@gmail.com>
Date: Sat, 28 Oct 2017 22:52:02 +0200
Subject: [PATCH] lswr/rematrix: Support s32p.
Fixes ticket #6785.
---
libswresample/rematrix.c | 21 +++++++++++++++------
1 file changed, 15 insertions(+), 6 deletions(-)
diff --git a/libswresample/rematrix.c b/libswresample/rematrix.c
index 66a43c1..a6aa6b0 100644
--- a/libswresample/rematrix.c
+++ b/libswresample/rematrix.c
@@ -445,14 +445,23 @@ av_cold int swri_rematrix_init(SwrContext *s){
s->mix_2_1_f = (mix_2_1_func_type*)sum2_double;
s->mix_any_f = (mix_any_func_type*)get_mix_any_func_double(s);
}else if(s->midbuf.fmt == AV_SAMPLE_FMT_S32P){
- // Only for dithering currently
-// s->native_matrix = av_calloc(nb_in * nb_out, sizeof(double));
- s->native_one = av_mallocz(sizeof(int));
+ s->native_one = av_mallocz(sizeof(int64_t));
if (!s->native_one)
return AVERROR(ENOMEM);
-// for (i = 0; i < nb_out; i++)
-// for (j = 0; j < nb_in; j++)
-// ((double*)s->native_matrix)[i * nb_in + j] = s->matrix[i][j];
+ s->native_matrix = av_calloc(nb_in * nb_out, sizeof(int));
+ if (!s->native_matrix) {
+ av_freep(&s->native_one);
+ return AVERROR(ENOMEM);
+ }
+ for (i = 0; i < nb_out; i++) {
+ double rem = 0;
+
+ for (j = 0; j < nb_in; j++) {
+ double target = s->matrix[i][j] * 32768 + rem;
+ ((int*)s->native_matrix)[i * nb_in + j] = lrintf(target);
+ rem += target - ((int64_t*)s->native_matrix)[i * nb_in + j];
+ }
+ }
*((int*)s->native_one) = 32768;
s->mix_1_1_f = (mix_1_1_func_type*)copy_s32;
s->mix_2_1_f = (mix_2_1_func_type*)sum2_s32;
--
1.7.10.4
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