Merge CV, ver=5.1; ops/methods from HV, and interface from CV where possible

[goodguy/history.git] / cinelerra-5.1 / libzmpeg3 / audio / synthesizers.C

diff --git a/cinelerra-5.1/libzmpeg3/audio/synthesizers.C b/cinelerra-5.1/libzmpeg3/audio/synthesizers.C
new file mode 100644 (file)
index 0000000..d22d4c1
--- /dev/null
+++ b/cinelerra-5.1/libzmpeg3/audio/synthesizers.C
@@ -0,0 +1,123 @@
+#include "../libzmpeg3.h"
+
+#define WRITE_SAMPLE(samples, sum) do { *(samples) = (sum); } while(0)
+
+int zaudio_decoder_layer_t::
+synth_stereo(float *bandPtr, int channel, float *out, int *pnt)
+{
+  float *samples = out + *pnt;
+  register float sum;
+  float *b0, (*buf)[0x110];
+  int j, bo1;
+
+  if( !channel ) {
+    --bo;
+    bo &= 0xf;
+    buf = synth_stereo_buffs[0];
+  }
+  else
+    buf = synth_stereo_buffs[1];
+
+  if( bo & 0x1 ) {
+    b0 = buf[0];
+    bo1 = bo;
+    dct64(buf[1] + ((bo + 1) & 0xf), buf[0] + bo, bandPtr);
+  }
+  else {
+    b0 = buf[1];
+    bo1 = bo + 1;
+    dct64(buf[0] + bo, buf[1] + bo + 1, bandPtr);
+  }
+
+//zmsgs("%f %f %f\n", buf[0][0], buf[1][0], bandPtr[0]);
+
+  float *window = decwin + 16 - bo1;
+  for( j=16; j > 0; --j, b0+=0x10, window+=0x20, ++samples ) {
+    sum  = window[0x0] * b0[0x0];
+    sum -= window[0x1] * b0[0x1];
+    sum += window[0x2] * b0[0x2];
+    sum -= window[0x3] * b0[0x3];
+    sum += window[0x4] * b0[0x4];
+    sum -= window[0x5] * b0[0x5];
+    sum += window[0x6] * b0[0x6];
+    sum -= window[0x7] * b0[0x7];
+    sum += window[0x8] * b0[0x8];
+    sum -= window[0x9] * b0[0x9];
+    sum += window[0xA] * b0[0xA];
+    sum -= window[0xB] * b0[0xB];
+    sum += window[0xC] * b0[0xC];
+    sum -= window[0xD] * b0[0xD];
+    sum += window[0xE] * b0[0xE];
+    sum -= window[0xF] * b0[0xF];
+    WRITE_SAMPLE(samples, sum);
+  }
+
+  sum  = window[0x0] * b0[0x0];
+  sum += window[0x2] * b0[0x2];
+  sum += window[0x4] * b0[0x4];
+  sum += window[0x6] * b0[0x6];
+  sum += window[0x8] * b0[0x8];
+  sum += window[0xA] * b0[0xA];
+  sum += window[0xC] * b0[0xC];
+  sum += window[0xE] * b0[0xE];
+  WRITE_SAMPLE(samples, sum);
+  b0 -= 0x10;
+  window -= 0x20;
+  ++samples;
+  window += bo1 << 1;
+
+  for( j=15; j > 0; --j, b0-=0x10, window-=0x20, ++samples ) {
+    sum = -window[-0x1] * b0[0x0];
+    sum -= window[-0x2] * b0[0x1];
+    sum -= window[-0x3] * b0[0x2];
+    sum -= window[-0x4] * b0[0x3];
+    sum -= window[-0x5] * b0[0x4];
+    sum -= window[-0x6] * b0[0x5];
+    sum -= window[-0x7] * b0[0x6];
+    sum -= window[-0x8] * b0[0x7];
+    sum -= window[-0x9] * b0[0x8];
+    sum -= window[-0xA] * b0[0x9];
+    sum -= window[-0xB] * b0[0xA];
+    sum -= window[-0xC] * b0[0xB];
+    sum -= window[-0xD] * b0[0xC];
+    sum -= window[-0xE] * b0[0xD];
+    sum -= window[-0xF] * b0[0xE];
+    sum -= window[-0x0] * b0[0xF];
+
+    WRITE_SAMPLE(samples, sum);
+  }
+  *pnt += 32;
+
+  return 0;
+}
+
+
+
+/* Call this after every seek to reset the buffers */
+int zaudio_decoder_layer_t::
+synths_reset()
+{
+  int i, j, k;
+  for( i=0; i < 2; ++i ) {
+    for( j=0; j < 2; ++j ) {
+      for( k=0; k < 0x110; ++k ) {
+        synth_stereo_buffs[i][j][k] = 0;
+      }
+    }
+  }
+  for( i=0; i < 64; ++i ) {
+    synth_mono_buff[i] = 0;
+    layer2_scfsi_buf[i] = 0;
+  }
+  for( i=0; i < 2; ++i ) {
+    for( j=0; j < 2; ++j ) {
+      for( k=0; k < (int)(SBLIMIT*SSLIMIT); ++k ) {
+        mp3_block[i][j][k] = 0;
+      }
+    }
+  }
+  mp3_blc[0] = 0;
+  mp3_blc[1] = 0;
+  return 0;
+}
+