X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=compress_filter.c;h=0c0200e7e3b522af5aad7bb0a9f86f7e32024218;hp=f6108c752ab97bb87228ea6cfe118b7003673cd3;hb=38657223b245405602bc50906a9687ce98f53857;hpb=aa74a903545250506fd4c29791e6f4aef3a01c41 diff --git a/compress_filter.c b/compress_filter.c index f6108c75..0c0200e7 100644 --- a/compress_filter.c +++ b/compress_filter.c @@ -74,18 +74,23 @@ next_buffer: op = para_malloc(length); for (i = 0; i < length / 2; i++) { /* be careful in that heat, my dear */ - int sample = *ip++, adjusted_sample = (PARA_ABS(sample) * - pcd->current_gain) >> gain_shift; - if (adjusted_sample > 32767) { /* clip */ - PARA_NOTICE_LOG("clip: sample: %d, adjusted sample: %d\n", - sample, adjusted_sample); - adjusted_sample = 32767; + int sample = *ip++; + bool neg = false; + + if (sample < 0) { + sample = -sample; + neg = true; + } + sample *= pcd->current_gain; + sample >>= gain_shift; + if (sample > 32767) { /* clip */ + sample = 32767; pcd->current_gain = (3 * pcd->current_gain + (1 << pcd->conf->inertia_arg)) / 4; pcd->peak = 0; - } else - pcd->peak = PARA_MAX(pcd->peak, adjusted_sample); - op[i] = sample >= 0? adjusted_sample : -adjusted_sample; + } else if (sample > pcd->peak) + pcd->peak = sample; + op[i] = neg? -sample : sample; if (++pcd->num_samples & mask) continue; // PARA_DEBUG_LOG("gain: %u, peak: %u\n", pcd->current_gain,