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Diffstat (limited to '')
| -rw-r--r-- | src/pcm_mix.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/pcm_mix.h b/src/pcm_mix.h index f3fe3c365..28b338f23 100644 --- a/src/pcm_mix.h +++ b/src/pcm_mix.h @@ -23,6 +23,19 @@ struct audio_format; +/* + * Linearly mixes two PCM buffers. Both must have the same length and + * the same audio format. The formula is: + * + * s1 := s1 * portion1 + s2 * (1 - portion1) + * + * @param buffer1 the first PCM buffer, and the destination buffer + * @param buffer2 the second PCM buffer + * @param size the size of both buffers in bytes + * @param format the audio format of both buffers + * @param portion1 a number between 0.0 and 1.0 specifying the portion + * of the first buffer in the mix; portion2 = (1.0 - portion1) + */ void pcm_mix(void *buffer1, const void *buffer2, size_t size, const struct audio_format *format, float portion1); |