diff options
Diffstat (limited to 'apps/codecs/aiff_enc.c')
| -rw-r--r-- | apps/codecs/aiff_enc.c | 48 |
1 files changed, 24 insertions, 24 deletions
diff --git a/apps/codecs/aiff_enc.c b/apps/codecs/aiff_enc.c index 1de25a4915..2292bcc275 100644 --- a/apps/codecs/aiff_enc.c +++ b/apps/codecs/aiff_enc.c @@ -221,6 +221,22 @@ STATICIRAM void enc_events_callback(enum enc_events event, void *data) } /* enc_events_callback */ /* convert native pcm samples to aiff format samples */ +static inline void sample_to_mono(uint32_t **src, uint32_t **dst) +{ + int32_t lr1, lr2; + + lr1 = *(*src)++; + lr1 = (int16_t)lr1 + (lr1 >> 16) + err; + err = lr1 & 1; + lr1 >>= 1; + + lr2 = *(*src)++; + lr2 = (int16_t)lr2 + (lr2 >> 16) + err; + err = lr2 & 1; + lr2 >>= 1; + *(*dst)++ = swap_odd_even_le32((lr1 << 16) | (uint16_t)lr2); +} /* sample_to_mono */ + STATICIRAM void chunk_to_aiff_format(uint32_t *src, uint32_t *dst) ICODE_ATTR; STATICIRAM void chunk_to_aiff_format(uint32_t *src, uint32_t *dst) { @@ -238,32 +254,16 @@ STATICIRAM void chunk_to_aiff_format(uint32_t *src, uint32_t *dst) */ uint32_t *src_end = src + PCM_SAMP_PER_CHUNK; - inline void to_mono(uint32_t **src, uint32_t **dst) - { - int32_t lr1, lr2; - - lr1 = *(*src)++; - lr1 = (int16_t)lr1 + (lr1 >> 16) + err; - err = lr1 & 1; - lr1 >>= 1; - - lr2 = *(*src)++; - lr2 = (int16_t)lr2 + (lr2 >> 16) + err; - err = lr2 & 1; - lr2 >>= 1; - *(*dst)++ = swap_odd_even_le32((lr1 << 16) | (uint16_t)lr2); - } /* to_mono */ - do { - to_mono(&src, &dst); - to_mono(&src, &dst); - to_mono(&src, &dst); - to_mono(&src, &dst); - to_mono(&src, &dst); - to_mono(&src, &dst); - to_mono(&src, &dst); - to_mono(&src, &dst); + sample_to_mono(&src, &dst); + sample_to_mono(&src, &dst); + sample_to_mono(&src, &dst); + sample_to_mono(&src, &dst); + sample_to_mono(&src, &dst); + sample_to_mono(&src, &dst); + sample_to_mono(&src, &dst); + sample_to_mono(&src, &dst); } while (src < src_end); } |