diff options
Diffstat (limited to 'frame.c')
-rwxr-xr-x | frame.c | 19 |
1 files changed, 19 insertions, 0 deletions
@@ -1252,3 +1252,22 @@ int ast_codec_get_len(int format, int samples) return len; } + +int ast_frame_adjust_volume(struct ast_frame *f, int adjustment) +{ + int count; + short *fdata = f->data; + + if ((f->frametype != AST_FRAME_VOICE) || (f->subclass != AST_FORMAT_SLINEAR)) + return -1; + + for (count = 0; count < f->samples; count++) { + if (adjustment > 0) { + fdata[count] *= abs(adjustment); + } else if (adjustment < 0) { + fdata[count] /= abs(adjustment); + } + } + + return 0; +} |