diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/post/audio/upmix.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/src/post/audio/upmix.c b/src/post/audio/upmix.c index af0aaeb54..c850325d6 100644 --- a/src/post/audio/upmix.c +++ b/src/post/audio/upmix.c @@ -23,7 +23,7 @@ * process. It simply paints the screen a solid color and rotates through * colors on each iteration. * - * $Id: upmix.c,v 1.6 2004/05/16 16:23:09 jcdutton Exp $ + * $Id: upmix.c,v 1.7 2004/05/17 15:10:20 jcdutton Exp $ * */ @@ -223,20 +223,27 @@ static int upmix_frames_2to51_any_to_float(uint8_t *dst8, uint8_t *src8, int num default: left = right = 0.0; } - + /* Left channel */ dst[dst_frame] = left; + /* Right channel */ dst[dst_frame+1] = right; /* try a bit of dolby */ /* FIXME: Dobly surround is a bit more complicated than this, but this is a start. */ + /* Rear Left channel */ dst[dst_frame+2] = (left - right) / 2; + /* Rear Right channel */ dst[dst_frame+3] = (left - right) / 2; sum = (left + right) / 2; - dst[dst_frame+4] = sum; + /* Center channel */ + /* Mute this one because it just causes the Left/Right channel spacing to get moved to the center. */ + /* dst[dst_frame+4] = sum; */ + dst[dst_frame+4] = 0; /* Create the LFE channel using a low pass filter */ /* filter feature ported from mplayer */ sample = sum; IIR(sample * sub->k, sub->w[0], sub->q[0], sample); IIR(sample , sub->w[1], sub->q[1], sample); + /* LFE or Sub woofer channel */ dst[dst_frame+5] = sample; } |