diff options
author | Richard Boulton <richard@tartarus.org> | 2002-03-08 16:43:08 +0000 |
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committer | Richard Boulton <richard@tartarus.org> | 2002-03-08 16:43:08 +0000 |
commit | 31b3a71dc8ce8f38b4e7a51ccb6cb1dbfc3a75b6 (patch) | |
tree | bd3a0b0dcc65bb49e8cdd35bf32c4b1a70510491 /gst/monoscope/monoscope.c | |
parent | fef1a9307ee15214fe0882df6b4f6ce65adbeb55 (diff) |
Remove static structures: you can now have multiple monoscopes, and they'll actually display different things. :)
Original commit message from CVS:
Remove static structures: you can now have multiple monoscopes, and they'll
actually display different things. :)
Diffstat (limited to 'gst/monoscope/monoscope.c')
-rw-r--r-- | gst/monoscope/monoscope.c | 64 |
1 files changed, 30 insertions, 34 deletions
diff --git a/gst/monoscope/monoscope.c b/gst/monoscope/monoscope.c index af942aca..383581ea 100644 --- a/gst/monoscope/monoscope.c +++ b/gst/monoscope/monoscope.c @@ -20,18 +20,9 @@ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "monoscope.h" -#include "convolve.h" -#define scope_width 256 -#define scope_height 128 - -static gint16 copyEq[CONVOLVE_BIG]; -static int avgEq[CONVOLVE_SMALL]; // a running average of the last few. -static int avgMax; // running average of max sample. -static guint32 display[(scope_width + 1) * (scope_height + 1)]; - -static convolve_state *state = NULL; -static guint32 colors[64]; +#include <string.h> +#include <stdlib.h> static void colors_init(guint32 * colors) { @@ -43,13 +34,18 @@ static void colors_init(guint32 * colors) colors[63] = (40 << 16) + (75 << 8); } -void monoscope_init (guint32 resx, guint32 resy) +struct monoscope_state * monoscope_init (guint32 resx, guint32 resy) { - state = convolve_init(); - colors_init(colors); + struct monoscope_state * stateptr; + stateptr = calloc(1, sizeof(struct monoscope_state)); + if (stateptr == 0) return 0; + stateptr->cstate = convolve_init(); + colors_init(stateptr->colors); + return stateptr; } -guint32 * monoscope_update (gint16 data [512]) +guint32 * monoscope_update (struct monoscope_state * stateptr, + gint16 data [512]) { /* Note that CONVOLVE_BIG must == data size here, ie 512. */ /* Really, we want samples evenly spread over the available data. @@ -65,32 +61,32 @@ guint32 * monoscope_update (gint16 data [512]) int max = 1; short * thisEq; - memcpy (copyEq, data, sizeof (short) * CONVOLVE_BIG); - thisEq = copyEq; + memcpy (stateptr->copyEq, data, sizeof (short) * CONVOLVE_BIG); + thisEq = stateptr->copyEq; #if 1 - val = convolve_match (avgEq, copyEq, state); + val = convolve_match (stateptr->avgEq, stateptr->copyEq, stateptr->cstate); thisEq += val; #endif - memset(display, 0, 256 * 128 * sizeof(guint32)); + memset(stateptr->display, 0, 256 * 128 * sizeof(guint32)); for (i=0; i < 256; i++) { - foo = thisEq[i] + (avgEq[i] >> 1); - avgEq[i] = foo; + foo = thisEq[i] + (stateptr->avgEq[i] >> 1); + stateptr->avgEq[i] = foo; if (foo < 0) foo = -foo; if (foo > max) max = foo; } - avgMax += max - (avgMax >> 8); - if (avgMax < max) - avgMax = max; /* Avoid overflow */ - factor = 0x7fffffff / avgMax; + stateptr->avgMax += max - (stateptr->avgMax >> 8); + if (stateptr->avgMax < max) + stateptr->avgMax = max; /* Avoid overflow */ + factor = 0x7fffffff / stateptr->avgMax; /* Keep the scaling sensible. */ if (factor > (1 << 18)) factor = 1 << 18; if (factor < (1 << 8)) factor = 1 << 8; for (i=0; i < 256; i++) { - foo = avgEq[i] * factor; + foo = stateptr->avgEq[i] * factor; foo >>= 18; if (foo > 63) foo = 63; @@ -99,15 +95,15 @@ guint32 * monoscope_update (gint16 data [512]) val = (i + ((foo+64) << 8)); bar = val; if ((bar > 0) && (bar < (256 * 128))) { - loc = display + bar; + loc = stateptr->display + bar; if (foo < 0) { for (h = 0; h <= (-foo); h++) { - *loc = colors[h]; + *loc = stateptr->colors[h]; loc+=256; } } else { for (h = 0; h <= foo; h++) { - *loc = colors[h]; + *loc = stateptr->colors[h]; loc-=256; } } @@ -117,21 +113,21 @@ guint32 * monoscope_update (gint16 data [512]) /* Draw grid. */ for (i=16;i < 128; i+=16) { for (h = 0; h < 256; h+=2) { - display[(i << 8) + h] = colors[63]; + stateptr->display[(i << 8) + h] = stateptr->colors[63]; if (i == 64) - display[(i << 8) + h + 1] = colors[63]; + stateptr->display[(i << 8) + h + 1] = stateptr->colors[63]; } } for (i = 16; i < 256; i+=16) { for (h = 0; h < 128; h+=2) { - display[i + (h << 8)] = colors[63]; + stateptr->display[i + (h << 8)] = stateptr->colors[63]; } } - return display; + return stateptr->display; } -void monoscope_close () +void monoscope_close (struct monoscope_state * stateptr) { } |