From 6b517fdc95bdd4b199a9a1324fd6c11e51edb180 Mon Sep 17 00:00:00 2001 From: Sjoerd Mullender Date: Tue, 16 Mar 1993 12:25:30 +0000 Subject: Added conversion routines to sv module. --- Modules/svmodule.c | 65 +++++++++++++++++++++++----- Modules/yuv.h | 87 ++++++++++++++++++++++++++++++++++++++ Modules/yuvconvert.c | 117 +++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 259 insertions(+), 10 deletions(-) create mode 100644 Modules/yuv.h create mode 100644 Modules/yuvconvert.c diff --git a/Modules/svmodule.c b/Modules/svmodule.c index bbdbf33..d3fda30 100644 --- a/Modules/svmodule.c +++ b/Modules/svmodule.c @@ -31,6 +31,7 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. #include "modsupport.h" #include "compile.h" #include "ceval.h" +#include "yuv.h" /* for YUV conversion functions */ typedef struct { OB_HEAD @@ -63,7 +64,7 @@ svc_conversion(self, args, function, factor) captureobject *self; object *args; void (*function)(); - int factor; + float factor; { object *output; int invert; @@ -71,7 +72,7 @@ svc_conversion(self, args, function, factor) if (!getargs(args, "i", &invert)) return NULL; - output = newsizedstringobject(NULL, self->ob_info.width * self->ob_info.height * factor); + output = newsizedstringobject(NULL, (int) (self->ob_info.width * self->ob_info.height * factor)); if (output == NULL) return NULL; @@ -81,6 +82,46 @@ svc_conversion(self, args, function, factor) return output; } +/* + * 3 functions to convert from Starter Video YUV 4:1:1 format to + * Compression Library 4:2:2 Duplicate Chroma format. + */ +static object * +svc_YUVtoYUV422DC(self, args) + captureobject *self; + object *args; +{ + if (self->ob_info.format != SV_YUV411_FRAMES) { + err_setstr(SvError, "data has bad format"); + return NULL; + } + return svc_conversion(self, args, yuv_sv411_to_cl422dc, 2.0); +} + +static object * +svc_YUVtoYUV422DC_quarter(self, args) + captureobject *self; + object *args; +{ + if (self->ob_info.format != SV_YUV411_FRAMES) { + err_setstr(SvError, "data has bad format"); + return NULL; + } + return svc_conversion(self, args, yuv_sv411_to_cl422dc_quartersize, 0.5); +} + +static object * +svc_YUVtoYUV422DC_sixteenth(self, args) + captureobject *self; + object *args; +{ + if (self->ob_info.format != SV_YUV411_FRAMES) { + err_setstr(SvError, "data has bad format"); + return NULL; + } + return svc_conversion(self, args, yuv_sv411_to_cl422dc_sixteenthsize, 0.125); +} + static object * svc_YUVtoRGB(self, args) captureobject *self; @@ -94,7 +135,7 @@ svc_YUVtoRGB(self, args) err_setstr(SvError, "data had bad format"); return NULL; } - return svc_conversion(self, args, svYUVtoRGB, sizeof(long)); + return svc_conversion(self, args, svYUVtoRGB, (float) sizeof(long)); } static object * @@ -106,7 +147,7 @@ svc_RGB8toRGB32(self, args) err_setstr(SvError, "data has bad format"); return NULL; } - return svc_conversion(self, args, svRGB8toRGB32, sizeof(long)); + return svc_conversion(self, args, svRGB8toRGB32, (float) sizeof(long)); } static object * @@ -118,7 +159,7 @@ svc_InterleaveFields(self, args) err_setstr(SvError, "data has bad format"); return NULL; } - return svc_conversion(self, args, svInterleaveFields, 1); + return svc_conversion(self, args, svInterleaveFields, 1.0); } static object * @@ -241,6 +282,9 @@ static struct methodlist capture_methods[] = { {"UnlockCaptureData", svc_UnlockCaptureData}, {"FindVisibleRegion", svc_FindVisibleRegion}, {"GetFields", svc_GetFields}, + {"YUVtoYUV422DC", svc_YUVtoYUV422DC}, + {"YUVtoYUV422DC_quarter",svc_YUVtoYUV422DC_quarter}, + {"YUVtoYUV422DC_sixteenth",svc_YUVtoYUV422DC_sixteenth}, #ifdef USE_GL {"lrectwrite", svc_lrectwrite}, #endif @@ -817,7 +861,8 @@ static object * sv_conversion(self, args, function, inputfactor, factor) object *self, *args; void (*function)(); - int inputfactor, factor; + int inputfactor; + float factor; { int invert, width, height, inputlength; char *input; @@ -831,7 +876,7 @@ sv_conversion(self, args, function, inputfactor, factor) return NULL; } - output = newsizedstringobject(NULL, width * height * factor); + output = newsizedstringobject(NULL, (int) (width * height * factor)); if (output == NULL) return NULL; @@ -844,21 +889,21 @@ static object * sv_InterleaveFields(self, args) object *self, *args; { - return sv_conversion(self, args, svInterleaveFields, 1, 1); + return sv_conversion(self, args, svInterleaveFields, 1, 1.0); } static object * sv_RGB8toRGB32(self, args) object *self, *args; { - return sv_conversion(self, args, svRGB8toRGB32, 1, sizeof(long)); + return sv_conversion(self, args, svRGB8toRGB32, 1, (float) sizeof(long)); } static object * sv_YUVtoRGB(self, args) object *self, *args; { - return sv_conversion(self, args, svYUVtoRGB, 2, sizeof(long)); + return sv_conversion(self, args, svYUVtoRGB, 2, (float) sizeof(long)); } static void diff --git a/Modules/yuv.h b/Modules/yuv.h new file mode 100644 index 0000000..6c7b1e2 --- /dev/null +++ b/Modules/yuv.h @@ -0,0 +1,87 @@ +/* + * SVideo YUV 4:1:1 format. + * + * 4 consecutive quadwords describe 8 pixels on 2 lines, as depicted + * below. An array of (width/4) of the below structure describes 2 + * scan lines. + * + * +-------------------+ + * | 00 | 01 | 02 | 03 | . . . + * +-------------------+ + * | 10 | 11 | 12 | 13 | . . . + * +-------------------+ + */ +struct yuv411 { + struct { + unsigned int dummy:8; + unsigned int y0:8; + unsigned int u0:2; + unsigned int v0:2; + unsigned int y1:8; + unsigned int u1:2; + unsigned int v1:2; + } v[4]; +}; + +#define YUV411_Y00(y) (y).v[0].y0 +#define YUV411_Y01(y) (y).v[1].y0 +#define YUV411_Y02(y) (y).v[2].y0 +#define YUV411_Y03(y) (y).v[3].y0 +#define YUV411_Y10(y) (y).v[0].y1 +#define YUV411_Y11(y) (y).v[1].y1 +#define YUV411_Y12(y) (y).v[2].y1 +#define YUV411_Y13(y) (y).v[3].y1 +#define YUV411_U00(y) ((y).v[0].u0<<6|(y).v[1].u0<<4|(y).v[2].u0<<2|(y).v[3].u0) +#define YUV411_U01(y) YUV411_U00(y) +#define YUV411_U02(y) YUV411_U00(y) +#define YUV411_U03(y) YUV411_U00(y) +#define YUV411_U10(y) ((y).v[0].u1<<6|(y).v[1].u1<<4|(y).v[2].u1<<2|(y).v[3].u1) +#define YUV411_U11(y) YUV411_U10(y) +#define YUV411_U12(y) YUV411_U10(y) +#define YUV411_U13(y) YUV411_U10(y) +#define YUV411_V00(y) ((y).v[0].v0<<6|(y).v[1].v0<<4|(y).v[2].v0<<2|(y).v[3].v0) +#define YUV411_V01(y) YUV411_V00(y) +#define YUV411_V02(y) YUV411_V00(y) +#define YUV411_V03(y) YUV411_V00(y) +#define YUV411_V10(y) ((y).v[0].v1<<6|(y).v[1].v1<<4|(y).v[2].v1<<2|(y).v[3].v1) +#define YUV411_V11(y) YUV411_V10(y) +#define YUV411_V12(y) YUV411_V10(y) +#define YUV411_V13(y) YUV411_V10(y) + +/* + * Compression Library YUV 4:2:2 format. + * + * 1 longword describes 2 pixels. + * + * +-------+ + * | 0 | 1 | + * +-------+ + */ +struct yuv422 { + unsigned int u:8; + unsigned int y0:8; + unsigned int v:8; + unsigned int y1:8; +}; +#define YUV422_Y0(y) (y).y0 +#define YUV422_Y1(y) (y).y1 +#define YUV422_U0(y) (y).u +#define YUV422_U1(y) (y).u +#define YUV422_V0(y) (y).v +#define YUV422_V1(y) (y).v + +/* + * Compression library YUV 4:2:2 Duplicate Chroma format. + * + * This is like the previous format, but the U and V values are + * duplicated vertically (and hence there is some redundancy in the + * data). With other words, lines 2*n and 2*n+1 have the same U and V + * values but different Y values. + */ + +/* + * Conversion functions. + */ +void yuv_sv411_to_cl422dc(int, void *, void *, int, int); +void yuv_sv411_to_cl422dc_quartersize(int, void *, void *, int, int); +void yuv_sv411_to_cl422dc_sixteenthsize(int, void *, void *, int, int); diff --git a/Modules/yuvconvert.c b/Modules/yuvconvert.c new file mode 100644 index 0000000..1b0ea63 --- /dev/null +++ b/Modules/yuvconvert.c @@ -0,0 +1,117 @@ +#include "yuv.h" + +void +yuv_sv411_to_cl422dc(int invert, void *data, void *yuv, int width, int height) +{ + struct yuv411 *in = data; + struct yuv422 *out_even = yuv; + struct yuv422 *out_odd = out_even + width / 2; + int i, j; /* counters */ + + for (i = height / 2; i--; ) { + for (j = width / 4; j--; ) { + YUV422_Y0(*out_even) = YUV411_Y00(*in); + YUV422_U0(*out_even) = YUV411_U00(*in); + YUV422_V0(*out_even) = YUV411_V00(*in); + YUV422_Y1(*out_even) = YUV411_Y01(*in); + out_even++; + YUV422_Y0(*out_even) = YUV411_Y02(*in); + YUV422_U0(*out_even) = YUV411_U02(*in); + YUV422_V0(*out_even) = YUV411_V02(*in); + YUV422_Y1(*out_even) = YUV411_Y03(*in); + out_even++; + YUV422_Y0(*out_odd) = YUV411_Y10(*in); + YUV422_U0(*out_odd) = YUV411_U10(*in); + YUV422_V0(*out_odd) = YUV411_V10(*in); + YUV422_Y1(*out_odd) = YUV411_Y11(*in); + out_odd++; + YUV422_Y0(*out_odd) = YUV411_Y12(*in); + YUV422_U0(*out_odd) = YUV411_U12(*in); + YUV422_V0(*out_odd) = YUV411_V12(*in); + YUV422_Y1(*out_odd) = YUV411_Y13(*in); + out_odd++; + in++; + } + out_even += width / 2; + out_odd += width / 2; + } +} + +void +yuv_sv411_to_cl422dc_quartersize(int invert, void *data, void *yuv, + int width, int height) +{ + int w4 = width / 4; /* quarter of width is used often */ + struct yuv411 *in_even = data; + struct yuv411 *in_odd = in_even + w4; + struct yuv422 *out_even = yuv; + struct yuv422 *out_odd = out_even + w4; + int i, j; /* counters */ + int u, v; /* U and V values */ + + for (i = height / 4; i--; ) { + for (j = w4; j--; ) { + u = YUV411_U00(*in_even); + v = YUV411_V00(*in_even); + + YUV422_Y0(*out_even) = YUV411_Y00(*in_even); + YUV422_U0(*out_even) = u; + YUV422_V0(*out_even) = v; + YUV422_Y1(*out_even) = YUV411_Y02(*in_even); + + YUV422_Y0(*out_odd) = YUV411_Y10(*in_odd); + YUV422_U0(*out_odd) = u; + YUV422_V0(*out_odd) = v; + YUV422_Y1(*out_odd) = YUV411_Y12(*in_odd); + + in_even++; + in_odd++; + out_even++; + out_odd++; + } + in_even += w4; + in_odd += w4; + out_even += w4; + out_odd += w4; + } +} + +void +yuv_sv411_to_cl422dc_sixteenthsize(int invert, void *data, void *yuv, + int width, int height) +{ + int w4_3 = 3 * width / 4; /* three quarters of width is used often */ + int w8 = width / 8; /* and so is one eighth */ + struct yuv411 *in_even = data; + struct yuv411 *in_odd = in_even + width / 2; + struct yuv422 *out_even = yuv; + struct yuv422 *out_odd = out_even + w8; + int i, j; /* counters */ + int u, v; /* U and V values */ + + for (i = height / 8; i--; ) { + for (j = w8; j--; ) { + u = YUV411_U00(in_even[0]); + v = YUV411_V00(in_even[0]); + + YUV422_Y0(*out_even) = YUV411_Y00(in_even[0]); + YUV422_U0(*out_even) = u; + YUV422_V0(*out_even) = v; + YUV422_Y1(*out_even) = YUV411_Y00(in_even[1]); + + YUV422_Y0(*out_odd) = YUV411_Y00(in_odd[0]); + YUV422_U0(*out_odd) = u; + YUV422_V0(*out_odd) = v; + YUV422_Y1(*out_odd) = YUV411_Y00(in_even[1]); + + in_even += 2; + in_odd += 2; + out_even++; + out_odd++; + } + in_even += w4_3; + in_odd += w4_3; + out_even += w8; + out_odd += w8; + } +} -- cgit v0.12