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opus: statically allocate decoder state in iram

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Speeds up decoding of a 64kbps test file 26MHz on H300 (cf) and
2MHz on c200 (pp)

Change-Id: I2fb4fe6c0a29321087e02fbd17fd1b1eb84e7b57
Signed-off-by: Nils Wallménius <nils@rockbox.org>
This commit is contained in:
Andree Buschmann 2012-09-28 18:46:43 +02:00 • committed by Nils Wallménius
parent 706b920b99
commit 270d9eaee8
1 changed files with 10 additions and 2 deletions
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10
lib/rbcodec/codecs/libopus/opus_decoder.c
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@ -131,10 +131,13 @@ int opus_decoder_init(OpusDecoder *st, opus_int32 Fs, int channels)
return OPUS_OK; return OPUS_OK;
} }
#define STATIC_DECODER_SIZE 26532 /* 26486 for 32bit, 26532 for 64bit environment */
static char s_dec[STATIC_DECODER_SIZE] IBSS_ATTR MEM_ALIGN_ATTR;
OpusDecoder *opus_decoder_create(opus_int32 Fs, int channels, int *error) OpusDecoder *opus_decoder_create(opus_int32 Fs, int channels, int *error)
{ {
int ret; int ret;
OpusDecoder *st; OpusDecoder *st = NULL;
if ((Fs!=48000&&Fs!=24000&&Fs!=16000&&Fs!=12000&&Fs!=8000) if ((Fs!=48000&&Fs!=24000&&Fs!=16000&&Fs!=12000&&Fs!=8000)
|| (channels!=1&&channels!=2)) || (channels!=1&&channels!=2))
{ {
@ -142,7 +145,12 @@ OpusDecoder *opus_decoder_create(opus_int32 Fs, int channels, int *error)
*error = OPUS_BAD_ARG; *error = OPUS_BAD_ARG;
return NULL; return NULL;
} }
if (STATIC_DECODER_SIZE >= opus_decoder_get_size(channels))
st = (OpusDecoder *)s_dec;
else
st = (OpusDecoder *)opus_alloc(opus_decoder_get_size(channels)); st = (OpusDecoder *)opus_alloc(opus_decoder_get_size(channels));
if (st == NULL) if (st == NULL)
{ {
if (error) if (error)