diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/pulsecore/resampler.c | 96 |
1 files changed, 93 insertions, 3 deletions
diff --git a/src/pulsecore/resampler.c b/src/pulsecore/resampler.c index b2d512c8..f0515ebe 100644 --- a/src/pulsecore/resampler.c +++ b/src/pulsecore/resampler.c @@ -510,6 +510,52 @@ static pa_bool_t on_lfe(pa_channel_position_t p) { p == PA_CHANNEL_POSITION_LFE; } +static pa_bool_t on_front(pa_channel_position_t p) { + return + p == PA_CHANNEL_POSITION_FRONT_LEFT || + p == PA_CHANNEL_POSITION_FRONT_RIGHT || + p == PA_CHANNEL_POSITION_FRONT_CENTER || + p == PA_CHANNEL_POSITION_TOP_FRONT_LEFT || + p == PA_CHANNEL_POSITION_TOP_FRONT_RIGHT || + p == PA_CHANNEL_POSITION_TOP_FRONT_CENTER || + p == PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER || + p == PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER; +} + +static pa_bool_t on_rear(pa_channel_position_t p) { + return + p == PA_CHANNEL_POSITION_REAR_LEFT || + p == PA_CHANNEL_POSITION_REAR_RIGHT || + p == PA_CHANNEL_POSITION_REAR_CENTER || + p == PA_CHANNEL_POSITION_TOP_REAR_LEFT || + p == PA_CHANNEL_POSITION_TOP_REAR_RIGHT || + p == PA_CHANNEL_POSITION_TOP_REAR_CENTER; +} + +static pa_bool_t on_side(pa_channel_position_t p) { + return + p == PA_CHANNEL_POSITION_SIDE_LEFT || + p == PA_CHANNEL_POSITION_SIDE_RIGHT || + p == PA_CHANNEL_POSITION_TOP_CENTER; +} + +enum { + ON_FRONT, + ON_REAR, + ON_SIDE, + ON_OTHER +}; + +static int front_rear_side(pa_channel_position_t p) { + if (on_front(p)) + return ON_FRONT; + if (on_rear(p)) + return ON_REAR; + if (on_side(p)) + return ON_SIDE; + return ON_OTHER; +} + static void calc_map_table(pa_resampler *r) { unsigned oc, ic; pa_bool_t ic_connected[PA_CHANNELS_MAX]; @@ -601,7 +647,9 @@ static void calc_map_table(pa_resampler *r) { * D:left, all D:right, all D:center channels, gain is * 0.375. The current (as result of 1..6) factors * should be multiplied by 0.75. (Alt. suggestion: 0.25 - * vs. 0.5) + * vs. 0.5) If C-front is only mixed into + * L-front/R-front if available, otherwise into all L/R + * channels. Similarly for C-rear. * * S: and D: shall relate to the source resp. destination channels. * @@ -629,6 +677,8 @@ static void calc_map_table(pa_resampler *r) { if (!oc_connected && remix) { /* OK, we shall remix */ + /* Try to find matching input ports for this output port */ + if (on_left(b)) { unsigned n = 0; @@ -830,17 +880,54 @@ static void calc_map_table(pa_resampler *r) { } if (!mixed_in) { + unsigned ncenter[PA_CHANNELS_MAX]; + pa_bool_t found_frs[PA_CHANNELS_MAX]; + + memset(ncenter, 0, sizeof(ncenter)); + memset(found_frs, 0, sizeof(found_frs)); /* Hmm, as it appears there was no center channel we could mix our center channel in. In this case, mix it into left and right. Using .375 and 0.75 as factors. */ + for (ic = 0; ic < r->i_ss.channels; ic++) { + + if (ic_connected[ic]) + continue; + + if (!on_center(r->i_cm.map[ic])) + continue; + + for (oc = 0; oc < r->o_ss.channels; oc++) { + + if (!on_left(r->o_cm.map[oc]) && !on_right(r->o_cm.map[oc])) + continue; + + if (front_rear_side(r->i_cm.map[ic]) == front_rear_side(r->o_cm.map[oc])) { + found_frs[ic] = TRUE; + break; + } + } + + for (oc = 0; oc < r->o_ss.channels; oc++) { + + if (!on_left(r->o_cm.map[oc]) && !on_right(r->o_cm.map[oc])) + continue; + + if (!found_frs[ic] || front_rear_side(r->i_cm.map[ic]) == front_rear_side(r->o_cm.map[oc])) + ncenter[oc]++; + } + } + for (oc = 0; oc < r->o_ss.channels; oc++) { if (!on_left(r->o_cm.map[oc]) && !on_right(r->o_cm.map[oc])) continue; + if (ncenter[oc] <= 0) + continue; + for (ic = 0; ic < r->i_ss.channels; ic++) { if (ic_connected[ic]) { @@ -848,8 +935,11 @@ static void calc_map_table(pa_resampler *r) { continue; } - if (on_center(r->i_cm.map[ic])) - r->map_table[oc][ic] = .375f / (float) ic_unconnected_center; + if (!on_center(r->i_cm.map[ic])) + continue; + + if (!found_frs[ic] || front_rear_side(r->i_cm.map[ic]) == front_rear_side(r->o_cm.map[oc])) + r->map_table[oc][ic] = .375f / (float) ncenter[oc]; } } } |