| … | |
… | |
| 236 | } |
236 | } |
| 237 | } |
237 | } |
| 238 | OUTPUT: |
238 | OUTPUT: |
| 239 | RETVAL |
239 | RETVAL |
| 240 | |
240 | |
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241 | SV * |
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242 | make_histogram (SV *ar) |
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243 | CODE: |
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244 | { |
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245 | int i; |
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246 | AV *av, *result; |
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247 | |
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248 | if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) |
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249 | croak ("Not an array ref as first argument to make_histogram"); |
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250 | |
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251 | av = (AV *) SvRV (ar); |
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252 | result = newAV (); |
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253 | |
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254 | for (i = 0; i <= av_len (av); ++i) |
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255 | { |
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256 | const int HISTSIZE = 64; |
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257 | |
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258 | int j; |
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259 | SV *sv = *av_fetch (av, i, 1); |
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260 | STRLEN len; |
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261 | char *buf = SvPVbyte (sv, len); |
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262 | |
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263 | int tmphist[HISTSIZE]; |
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264 | float *hist; |
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265 | |
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266 | SV *histsv = newSV (HISTSIZE * sizeof (float) + 1); |
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267 | SvPOK_on (histsv); |
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268 | SvCUR_set (histsv, HISTSIZE * sizeof (float)); |
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269 | hist = (float *)SvPVX (histsv); |
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270 | |
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271 | Zero (tmphist, sizeof (tmphist), char); |
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272 | |
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273 | for (j = len; j--; ) |
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274 | { |
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275 | unsigned int idx |
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276 | = ((*buf & 0xc0) >> 2) |
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277 | | ((*buf & 0x18) >> 1) |
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278 | | (*buf & 0x03); |
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279 | |
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280 | ++tmphist[idx]; |
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281 | ++buf; |
|
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282 | } |
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283 | |
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284 | for (j = 0; j < HISTSIZE; ++j) |
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285 | hist[j] = (float)tmphist[j] / (len + 1e-30); |
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286 | |
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287 | av_push (result, histsv); |
|
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288 | } |
|
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289 | |
|
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290 | RETVAL = newRV_noinc ((SV *)result); |
|
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291 | } |
|
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292 | OUTPUT: |
|
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293 | RETVAL |
|
|
294 | |
|
|
295 | |
|
|
296 | |
| 241 | ############################################################################# |
297 | ############################################################################# |
| 242 | |
298 | |
| 243 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
299 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
| 244 | |
300 | |
| 245 | void |
301 | void |
