summaryrefslogtreecommitdiffstats
path: root/media/libspeex_resampler/04_hugemem.patch
blob: f8bbac8c9f8fdffdcb3253f9f7024a508f3475f3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
diff --git a/src/resample.c b/src/resample.c
--- a/src/resample.c
+++ b/src/resample.c
@@ -56,16 +56,18 @@
    (e.g. 2/3), and get rid of the rounding operations in the inner loop.
    The latter both reduces CPU time and makes the algorithm more SIMD-friendly.
 */
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
+#define RESAMPLE_HUGEMEM 1
+
 #ifdef OUTSIDE_SPEEX
 #include <stdlib.h>
 static void *speex_alloc(int size) {return calloc(size,1);}
 static void *speex_realloc(void *ptr, int size) {return realloc(ptr, size);}
 static void speex_free(void *ptr) {free(ptr);}
 #ifndef EXPORT
 #define EXPORT
 #endif
@@ -633,25 +645,26 @@ static int update_filter(SpeexResamplerS
          st->oversample >>= 1;
       if (st->oversample < 1)
          st->oversample = 1;
    } else {
       /* up-sampling */
       st->cutoff = quality_map[st->quality].upsample_bandwidth;
    }
 
-#ifdef RESAMPLE_FULL_SINC_TABLE
-   use_direct = 1;
-   if (INT_MAX/sizeof(spx_word16_t)/st->den_rate < st->filt_len)
-      goto fail;
-#else
-   /* Choose the resampling type that requires the least amount of memory */
-   use_direct = st->filt_len*st->den_rate <= st->filt_len*st->oversample+8
-                && INT_MAX/sizeof(spx_word16_t)/st->den_rate >= st->filt_len;
+   use_direct =
+#ifdef RESAMPLE_HUGEMEM
+      /* Choose the direct resampler, even with higher initialization costs,
+         when resampling any multiple of 100 to 44100. */
+      st->den_rate <= 441
+#else
+      /* Choose the resampling type that requires the least amount of memory */
+      st->filt_len*st->den_rate <= st->filt_len*st->oversample+8
 #endif
+                && INT_MAX/sizeof(spx_word16_t)/st->den_rate >= st->filt_len;
    if (use_direct)
    {
       min_sinc_table_length = st->filt_len*st->den_rate;
    } else {
       if ((INT_MAX/sizeof(spx_word16_t)-8)/st->oversample < st->filt_len)
          goto fail;
 
       min_sinc_table_length = st->filt_len*st->oversample+8;