diff options
Diffstat (limited to 'src/pcm_mix.c')
| -rw-r--r-- | src/pcm_mix.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/pcm_mix.c b/src/pcm_mix.c index 34b4b9175..6e678a912 100644 --- a/src/pcm_mix.c +++ b/src/pcm_mix.c @@ -82,6 +82,23 @@ pcm_add_24(int32_t *buffer1, const int32_t *buffer2, } static void +pcm_add_32(int32_t *buffer1, const int32_t *buffer2, + unsigned num_samples, unsigned volume1, unsigned volume2) +{ + while (num_samples > 0) { + int64_t sample1 = *buffer1; + int64_t sample2 = *buffer2++; + + sample1 = ((sample1 * volume1 + sample2 * volume2) + + pcm_volume_dither() + PCM_VOLUME_1 / 2) + / PCM_VOLUME_1; + + *buffer1++ = pcm_range_64(sample1, 32); + --num_samples; + } +} + +static void pcm_add(void *buffer1, const void *buffer2, size_t size, int vol1, int vol2, const struct audio_format *format) @@ -103,6 +120,12 @@ pcm_add(void *buffer1, const void *buffer2, size_t size, size / 4, vol1, vol2); break; + case 32: + pcm_add_32((int32_t*)buffer1, + (const int32_t*)buffer2, + size / 4, vol1, vol2); + break; + default: g_error("%u bits not supported by pcm_add!\n", format->bits); } |