diff options
| author | Nils Wallménius <nils@rockbox.org> | 2012-09-26 11:54:03 +0200 |
|---|---|---|
| committer | Nils Wallménius <nils@rockbox.org> | 2012-09-26 11:54:03 +0200 |
| commit | f636aa07dfb541b5828d44e8168e7b36e5ad8898 (patch) | |
| tree | 9755b43e8081011a9492064fc5602ee0fa7f7b83 | |
| parent | 425725edb087bc606bfe4ca4fe9e26008ef49b6a (diff) | |
opus: put frequently used mdct buffer on the real stack which is in iram
Saves about 30MHz on h300 (cf) and 1.5MHz on c200 (pp) decoding a
64kbps test file. Stack usage is still below 70%.
Change-Id: Ib13df9011adb4eef4bb91a52e5a32741c8bf8988
| -rw-r--r-- | lib/rbcodec/codecs/libopus/celt/mdct.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/lib/rbcodec/codecs/libopus/celt/mdct.c b/lib/rbcodec/codecs/libopus/celt/mdct.c index 4b66c211cf..15d2393d6f 100644 --- a/lib/rbcodec/codecs/libopus/celt/mdct.c +++ b/lib/rbcodec/codecs/libopus/celt/mdct.c @@ -214,14 +214,15 @@ void clt_mdct_backward(const mdct_lookup *l, kiss_fft_scalar *in, kiss_fft_scala int i; int N, N2, N4; kiss_twiddle_scalar sine; - VARDECL(kiss_fft_scalar, f); +/* VARDECL(kiss_fft_scalar, f); */ VARDECL(kiss_fft_scalar, f2); SAVE_STACK; - N = l->n; + N = l->n; /* static modes => N = 1920 */ N >>= shift; N2 = N>>1; N4 = N>>2; - ALLOC(f, N2, kiss_fft_scalar); +/* ALLOC(f, N2, kiss_fft_scalar); */ + kiss_fft_scalar f[N2]; /* worst case 3840b */ ALLOC(f2, N2, kiss_fft_scalar); /* sin(x) ~= x here */ #ifdef FIXED_POINT |