Release synfig_0_61_03

[synfig.git] / synfig-core / tags / synfig_0_61_03 / synfig-core / src / modules / mod_libavcodec / libavcodec / liba52 / resample_c.c

diff --git a/synfig-core/tags/synfig_0_61_03/synfig-core/src/modules/mod_libavcodec/libavcodec/liba52/resample_c.c b/synfig-core/tags/synfig_0_61_03/synfig-core/src/modules/mod_libavcodec/libavcodec/liba52/resample_c.c
new file mode 100644 (file)
index 0000000..a618ec6
--- /dev/null
+++ b/synfig-core/tags/synfig_0_61_03/synfig-core/src/modules/mod_libavcodec/libavcodec/liba52/resample_c.c
@@ -0,0 +1,183 @@
+// this code is based on a52dec/libao/audio_out_oss.c
+
+static inline int16_t convert (int32_t i)
+{
+    if (i > 0x43c07fff)
+       return 32767;
+    else if (i < 0x43bf8000)
+       return -32768;
+    else
+       return i - 0x43c00000;
+}
+
+static int a52_resample_MONO_to_5_C(float * _f, int16_t * s16){
+    int i;
+    int32_t * f = (int32_t *) _f;
+       for (i = 0; i < 256; i++) {
+           s16[5*i] = s16[5*i+1] = s16[5*i+2] = s16[5*i+3] = 0;
+           s16[5*i+4] = convert (f[i]);
+       }
+    return 5*256;
+}
+
+static int a52_resample_MONO_to_1_C(float * _f, int16_t * s16){
+    int i;
+    int32_t * f = (int32_t *) _f;
+       for (i = 0; i < 256; i++) {
+           s16[i] = convert (f[i]);
+       }
+    return 1*256;
+}
+
+static int a52_resample_STEREO_to_2_C(float * _f, int16_t * s16){
+    int i;
+    int32_t * f = (int32_t *) _f;
+       for (i = 0; i < 256; i++) {
+           s16[2*i] = convert (f[i]);
+           s16[2*i+1] = convert (f[i+256]);
+       }
+    return 2*256;
+}
+
+static int a52_resample_3F_to_5_C(float * _f, int16_t * s16){
+    int i;
+    int32_t * f = (int32_t *) _f;
+       for (i = 0; i < 256; i++) {
+           s16[5*i] = convert (f[i]);
+           s16[5*i+1] = convert (f[i+512]);
+           s16[5*i+2] = s16[5*i+3] = 0;
+           s16[5*i+4] = convert (f[i+256]);
+       }
+    return 5*256;
+}
+
+static int a52_resample_2F_2R_to_4_C(float * _f, int16_t * s16){
+    int i;
+    int32_t * f = (int32_t *) _f;
+       for (i = 0; i < 256; i++) {
+           s16[4*i] = convert (f[i]);
+           s16[4*i+1] = convert (f[i+256]);
+           s16[4*i+2] = convert (f[i+512]);
+           s16[4*i+3] = convert (f[i+768]);
+       }
+    return 4*256;
+}
+
+static int a52_resample_3F_2R_to_5_C(float * _f, int16_t * s16){
+    int i;
+    int32_t * f = (int32_t *) _f;
+       for (i = 0; i < 256; i++) {
+           s16[5*i] = convert (f[i]);
+           s16[5*i+1] = convert (f[i+512]);
+           s16[5*i+2] = convert (f[i+768]);
+           s16[5*i+3] = convert (f[i+1024]);
+           s16[5*i+4] = convert (f[i+256]);
+       }
+    return 5*256;
+}
+
+static int a52_resample_MONO_LFE_to_6_C(float * _f, int16_t * s16){
+    int i;
+    int32_t * f = (int32_t *) _f;
+       for (i = 0; i < 256; i++) {
+           s16[6*i] = s16[6*i+1] = s16[6*i+2] = s16[6*i+3] = 0;
+           s16[6*i+4] = convert (f[i+256]);
+           s16[6*i+5] = convert (f[i]);
+       }
+    return 6*256;
+}
+
+static int a52_resample_STEREO_LFE_to_6_C(float * _f, int16_t * s16){
+    int i;
+    int32_t * f = (int32_t *) _f;
+       for (i = 0; i < 256; i++) {
+           s16[6*i] = convert (f[i+256]);
+           s16[6*i+1] = convert (f[i+512]);
+           s16[6*i+2] = s16[6*i+3] = s16[6*i+4] = 0;
+           s16[6*i+5] = convert (f[i]);
+       }
+    return 6*256;
+}
+
+static int a52_resample_3F_LFE_to_6_C(float * _f, int16_t * s16){
+    int i;
+    int32_t * f = (int32_t *) _f;
+       for (i = 0; i < 256; i++) {
+           s16[6*i] = convert (f[i+256]);
+           s16[6*i+1] = convert (f[i+768]);
+           s16[6*i+2] = s16[6*i+3] = 0;
+           s16[6*i+4] = convert (f[i+512]);
+           s16[6*i+5] = convert (f[i]);
+       }
+    return 6*256;
+}
+
+static int a52_resample_2F_2R_LFE_to_6_C(float * _f, int16_t * s16){
+    int i;
+    int32_t * f = (int32_t *) _f;
+       for (i = 0; i < 256; i++) {
+           s16[6*i] = convert (f[i+256]);
+           s16[6*i+1] = convert (f[i+512]);
+           s16[6*i+2] = convert (f[i+768]);
+           s16[6*i+3] = convert (f[i+1024]);
+           s16[6*i+4] = 0;
+           s16[6*i+5] = convert (f[i]);
+       }
+    return 6*256;
+}
+
+static int a52_resample_3F_2R_LFE_to_6_C(float * _f, int16_t * s16){
+    int i;
+    int32_t * f = (int32_t *) _f;
+       for (i = 0; i < 256; i++) {
+           s16[6*i] = convert (f[i+256]);
+           s16[6*i+1] = convert (f[i+768]);
+           s16[6*i+2] = convert (f[i+1024]);
+           s16[6*i+3] = convert (f[i+1280]);
+           s16[6*i+4] = convert (f[i+512]);
+           s16[6*i+5] = convert (f[i]);
+       }
+    return 6*256;
+}
+
+
+static void* a52_resample_C(int flags, int ch){
+    switch (flags) {
+    case A52_MONO:
+       if(ch==5) return a52_resample_MONO_to_5_C;
+       if(ch==1) return a52_resample_MONO_to_1_C;
+       break;
+    case A52_CHANNEL:
+    case A52_STEREO:
+    case A52_DOLBY:
+       if(ch==2) return a52_resample_STEREO_to_2_C;
+       break;
+    case A52_3F:
+       if(ch==5) return a52_resample_3F_to_5_C;
+       break;
+    case A52_2F2R:
+       if(ch==4) return a52_resample_2F_2R_to_4_C;
+       break;
+    case A52_3F2R:
+       if(ch==5) return a52_resample_3F_2R_to_5_C;
+       break;
+    case A52_MONO | A52_LFE:
+       if(ch==6) return a52_resample_MONO_LFE_to_6_C;
+       break;
+    case A52_CHANNEL | A52_LFE:
+    case A52_STEREO | A52_LFE:
+    case A52_DOLBY | A52_LFE:
+       if(ch==6) return a52_resample_STEREO_LFE_to_6_C;
+       break;
+    case A52_3F | A52_LFE:
+       if(ch==6) return a52_resample_3F_LFE_to_6_C;
+       break;
+    case A52_2F2R | A52_LFE:
+       if(ch==6) return a52_resample_2F_2R_LFE_to_6_C;
+       break;
+    case A52_3F2R | A52_LFE:
+       if(ch==6) return a52_resample_3F_2R_LFE_to_6_C;
+       break;
+    }
+    return NULL;
+}