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-rw-r--r--src/lib/jpeg.c1047
1 files changed, 86 insertions, 961 deletions
diff --git a/src/lib/jpeg.c b/src/lib/jpeg.c
index ed4377f41a..242cf0ca8e 100644
--- a/src/lib/jpeg.c
+++ b/src/lib/jpeg.c
@@ -1,1000 +1,125 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
- * a tiny jpeg decoder.
- *
- * written in August 2001 by Michael Schroeder <mls@suse.de>
- *
+ * Provide a simple API around the Wuffs JPEG decoder
+ * Uses the heap (and lots of it) for the image-size specific
+ * work buffer, so ramstage-only.
*/
-#define __LITTLE_ENDIAN
-#include <string.h>
-#include "jpeg.h"
-#define ISHIFT 11
-
-#define IFIX(a) ((int)((a) * (1 << ISHIFT) + .5))
-#define IMULT(a, b) (((a) * (b)) >> ISHIFT)
-#define ITOINT(a) ((a) >> ISHIFT)
-
-#ifndef __P
-# define __P(x) x
-#endif
-
-/* special markers */
-#define M_BADHUFF -1
-#define M_EOF 0x80
-
-struct in {
- unsigned char *p;
- unsigned int bits;
- int left;
- int marker;
-
- int (*func) __P((void *));
- void *data;
-};
-
-/*********************************/
-struct dec_hufftbl;
-struct enc_hufftbl;
-
-union hufftblp {
- struct dec_hufftbl *dhuff;
- struct enc_hufftbl *ehuff;
-};
-
-struct scan {
- int dc; /* old dc value */
-
- union hufftblp hudc;
- union hufftblp huac;
- int next; /* when to switch to next scan */
-
- int cid; /* component id */
- int hv; /* horiz/vert, copied from comp */
- int tq; /* quant tbl, copied from comp */
-};
-
-/*********************************/
-
-#define DECBITS 10 /* seems to be the optimum */
-
-struct dec_hufftbl {
- int maxcode[17];
- int valptr[16];
- unsigned char vals[256];
- unsigned int llvals[1 << DECBITS];
-};
-
-static void decode_mcus __P((struct in *, int *, int, struct scan *, int *));
-static int dec_readmarker __P((struct in *));
-static void dec_makehuff __P((struct dec_hufftbl *, int *, unsigned char *));
-
-static void setinput __P((struct in *, unsigned char *));
-/*********************************/
-
-#undef PREC
-#define PREC int
-
-static void idctqtab __P((unsigned char *, PREC *));
-static void idct __P((int *, int *, PREC *, PREC, int));
-static void scaleidctqtab __P((PREC *, PREC));
-
-/*********************************/
-
-static void initcol __P((PREC[][64]));
+#include <stdint.h>
-static void col221111 __P((int *, unsigned char *, int));
-static void col221111_16 __P((int *, unsigned char *, int));
-static void col221111_32 __P((int *, unsigned char *, int));
-
-/*********************************/
-
-#define M_SOI 0xd8
-#define M_APP0 0xe0
-#define M_DQT 0xdb
-#define M_SOF0 0xc0
-#define M_DHT 0xc4
-#define M_DRI 0xdd
-#define M_SOS 0xda
-#define M_RST0 0xd0
-#define M_EOI 0xd9
-#define M_COM 0xfe
-
-static unsigned char *datap;
-
-static int getbyte(void)
-{
- return *datap++;
-}
-
-static int getword(void)
-{
- int c1, c2;
- c1 = *datap++;
- c2 = *datap++;
- return c1 << 8 | c2;
-}
-
-struct comp {
- int cid;
- int hv;
- int tq;
-};
-
-#define MAXCOMP 4
-struct jpginfo {
- int nc; /* number of components */
- int ns; /* number of scans */
- int dri; /* restart interval */
- int nm; /* mcus til next marker */
- int rm; /* next restart marker */
-};
-
-static struct jpginfo info;
-static struct comp comps[MAXCOMP];
-
-static struct scan dscans[MAXCOMP];
-
-static unsigned char quant[4][64];
-
-static struct dec_hufftbl dhuff[4];
+#include "jpeg.h"
-#define dec_huffdc (dhuff + 0)
-#define dec_huffac (dhuff + 2)
+#define WUFFS_CONFIG__AVOID_CPU_ARCH
+#define WUFFS_CONFIG__MODULES
+#define WUFFS_CONFIG__MODULE__BASE
+#define WUFFS_CONFIG__MODULE__JPEG
+#define WUFFS_CONFIG__STATIC_FUNCTIONS
+#define WUFFS_IMPLEMENTATION
+#include "../vendorcode/wuffs/wuffs-v0.4.c"
-static struct in glob_in;
+/* ~16K is big enough to move this off the stack */
+static wuffs_jpeg__decoder dec;
-static int readtables(int till)
+int jpeg_fetch_size(unsigned char *filedata, size_t filesize, unsigned int *width,
+ unsigned int *height)
{
- int m, l, i, j, lq, pq, tq;
- int tc, th, tt;
-
- for (;;) {
- if (getbyte() != 0xff)
- return -1;
- m = getbyte();
- if (m == till)
- break;
-
- switch (m) {
- case 0xc2:
- return 0;
-
- case M_DQT:
- lq = getword();
- while (lq > 2) {
- pq = getbyte();
- tq = pq & 15;
- if (tq > 3)
- return -1;
- pq >>= 4;
- if (pq != 0)
- return -1;
- for (i = 0; i < 64; i++)
- quant[tq][i] = getbyte();
- lq -= 64 + 1;
- }
- break;
-
- case M_DHT:
- l = getword();
- while (l > 2) {
- int hufflen[16], k;
- unsigned char huffvals[256];
-
- tc = getbyte();
- th = tc & 15;
- tc >>= 4;
- tt = tc * 2 + th;
- if (tc > 1 || th > 1)
- return -1;
- for (i = 0; i < 16; i++)
- hufflen[i] = getbyte();
- l -= 1 + 16;
- k = 0;
- for (i = 0; i < 16; i++) {
- for (j = 0; j < hufflen[i]; j++)
- huffvals[k++] = getbyte();
- l -= hufflen[i];
- }
- dec_makehuff(dhuff + tt, hufflen,
- huffvals);
- }
- break;
-
- case M_DRI:
- l = getword();
- info.dri = getword();
- break;
-
- default:
- l = getword();
- while (l-- > 2)
- getbyte();
- break;
- }
+ if (!width || !height) {
+ return JPEG_DECODE_FAILED;
}
- return 0;
-}
-
-static void dec_initscans(void)
-{
- int i;
-
- info.nm = info.dri + 1;
- info.rm = M_RST0;
- for (i = 0; i < info.ns; i++)
- dscans[i].dc = 0;
-}
-static int dec_checkmarker(void)
-{
- int i;
-
- if (dec_readmarker(&glob_in) != info.rm)
- return -1;
- info.nm = info.dri;
- info.rm = (info.rm + 1) & ~0x08;
- for (i = 0; i < info.ns; i++)
- dscans[i].dc = 0;
- return 0;
-}
-
-void jpeg_fetch_size(unsigned char *buf, int *width, int *height)
-{
- datap = buf;
- getbyte();
- getbyte();
- readtables(M_SOF0);
- getword();
- getbyte();
- *height = getword();
- *width = getword();
-}
-
-int jpeg_check_size(unsigned char *buf, int width, int height)
-{
- datap = buf;
- getbyte();
- getbyte();
- readtables(M_SOF0);
- getword();
- getbyte();
- if (height != getword() || width != getword())
- return 0;
- return 1;
-}
-
-int jpeg_decode(unsigned char *buf, unsigned char *pic,
- int width, int height, int bytes_per_line, int depth,
- struct jpeg_decdata *decdata)
-{
- int i, j, m, tac, tdc;
- int mcusx, mcusy, mx, my;
- int max[6];
-
- if (!decdata || !buf || !pic)
- return -1;
- datap = buf;
- if (getbyte() != 0xff)
- return ERR_NO_SOI;
- if (getbyte() != M_SOI)
- return ERR_NO_SOI;
- if (readtables(M_SOF0))
- return ERR_BAD_TABLES;
- getword();
- i = getbyte();
- if (i != 8)
- return ERR_NOT_8BIT;
- if (((getword() + 15) & ~15) != height)
- return ERR_HEIGHT_MISMATCH;
- if (((getword() + 15) & ~15) != width)
- return ERR_WIDTH_MISMATCH;
- if ((height & 15) || (width & 15))
- return ERR_BAD_WIDTH_OR_HEIGHT;
- info.nc = getbyte();
- if (info.nc > MAXCOMP)
- return ERR_TOO_MANY_COMPPS;
- for (i = 0; i < info.nc; i++) {
- int h, v;
- comps[i].cid = getbyte();
- comps[i].hv = getbyte();
- v = comps[i].hv & 15;
- h = comps[i].hv >> 4;
- comps[i].tq = getbyte();
- if (h > 3 || v > 3)
- return ERR_ILLEGAL_HV;
- if (comps[i].tq > 3)
- return ERR_QUANT_TABLE_SELECTOR;
+ wuffs_base__status status = wuffs_jpeg__decoder__initialize(
+ &dec, sizeof(dec), WUFFS_VERSION, WUFFS_INITIALIZE__DEFAULT_OPTIONS);
+ if (status.repr) {
+ return JPEG_DECODE_FAILED;
}
- if (readtables(M_SOS))
- return ERR_BAD_TABLES;
- getword();
- info.ns = getbyte();
- if (info.ns != 3)
- return ERR_NOT_YCBCR_221111;
- for (i = 0; i < 3; i++) {
- dscans[i].cid = getbyte();
- tdc = getbyte();
- tac = tdc & 15;
- tdc >>= 4;
- if (tdc > 1 || tac > 1)
- return ERR_QUANT_TABLE_SELECTOR;
- for (j = 0; j < info.nc; j++)
- if (comps[j].cid == dscans[i].cid)
- break;
- if (j == info.nc)
- return ERR_UNKNOWN_CID_IN_SCAN;
- dscans[i].hv = comps[j].hv;
- dscans[i].tq = comps[j].tq;
- dscans[i].hudc.dhuff = dec_huffdc + tdc;
- dscans[i].huac.dhuff = dec_huffac + tac;
- }
-
- i = getbyte();
- j = getbyte();
- m = getbyte();
-
- if (i != 0 || j != 63 || m != 0)
- return ERR_NOT_SEQUENTIAL_DCT;
-
- if (dscans[0].cid != 1 || dscans[1].cid != 2 || dscans[2].cid != 3)
- return ERR_NOT_YCBCR_221111;
-
- if (dscans[0].hv != 0x22 || dscans[1].hv != 0x11
- || dscans[2].hv != 0x11)
- return ERR_NOT_YCBCR_221111;
-
- mcusx = width >> 4;
- mcusy = height >> 4;
-
- idctqtab(quant[dscans[0].tq], decdata->dquant[0]);
- idctqtab(quant[dscans[1].tq], decdata->dquant[1]);
- idctqtab(quant[dscans[2].tq], decdata->dquant[2]);
- initcol(decdata->dquant);
- setinput(&glob_in, datap);
-
- dec_initscans();
-
- dscans[0].next = 6 - 4;
- dscans[1].next = 6 - 4 - 1;
- dscans[2].next = 6 - 4 - 1 - 1; /* 411 encoding */
- for (my = 0; my < mcusy; my++) {
- for (mx = 0; mx < mcusx; mx++) {
- if (info.dri && !--info.nm)
- if (dec_checkmarker())
- return ERR_WRONG_MARKER;
-
- decode_mcus(&glob_in, decdata->dcts, 6, dscans, max);
- idct(decdata->dcts, decdata->out, decdata->dquant[0],
- IFIX(128.5), max[0]);
- idct(decdata->dcts + 64, decdata->out + 64,
- decdata->dquant[0], IFIX(128.5), max[1]);
- idct(decdata->dcts + 128, decdata->out + 128,
- decdata->dquant[0], IFIX(128.5), max[2]);
- idct(decdata->dcts + 192, decdata->out + 192,
- decdata->dquant[0], IFIX(128.5), max[3]);
- idct(decdata->dcts + 256, decdata->out + 256,
- decdata->dquant[1], IFIX(0.5), max[4]);
- idct(decdata->dcts + 320, decdata->out + 320,
- decdata->dquant[2], IFIX(0.5), max[5]);
-
- switch (depth) {
- case 32:
- col221111_32(decdata->out,
- pic + my * 16 * bytes_per_line + mx * 16 * 4,
- bytes_per_line);
- break;
- case 24:
- col221111(decdata->out,
- pic + my * 16 * bytes_per_line + mx * 16 * 3,
- bytes_per_line);
- break;
- case 16:
- col221111_16(decdata->out,
- pic + my * 16 * bytes_per_line + mx * 16 * 2,
- bytes_per_line);
- break;
- default:
- return ERR_DEPTH_MISMATCH;
- }
- }
+ wuffs_base__image_config imgcfg;
+ wuffs_base__io_buffer src = wuffs_base__ptr_u8__reader(filedata, filesize, true);
+ status = wuffs_jpeg__decoder__decode_image_config(&dec, &imgcfg, &src);
+ if (status.repr) {
+ return JPEG_DECODE_FAILED;
}
- m = dec_readmarker(&glob_in);
- if (m != M_EOI)
- return ERR_NO_EOI;
+ *width = wuffs_base__pixel_config__width(&imgcfg.pixcfg);
+ *height = wuffs_base__pixel_config__height(&imgcfg.pixcfg);
return 0;
}
-/****************************************************************/
-/************** huffman decoder ***************/
-/****************************************************************/
-
-static int fillbits __P((struct in *, int, unsigned int));
-static int dec_rec2
-__P((struct in *, struct dec_hufftbl *, int *, int, int));
-
-static void setinput(struct in *in, unsigned char *p)
-{
- in->p = p;
- in->left = 0;
- in->bits = 0;
- in->marker = 0;
-}
-
-static int fillbits(struct in *in, int le, unsigned int bi)
+int jpeg_decode(unsigned char *filedata, size_t filesize, unsigned char *pic,
+ unsigned int width, unsigned int height, unsigned int bytes_per_line,
+ unsigned int depth)
{
- int b, m;
-
- if (in->marker) {
- if (le <= 16)
- in->bits = bi << 16, le += 16;
- return le;
+ if (!filedata || !pic) {
+ return JPEG_DECODE_FAILED;
}
- while (le <= 24) {
- b = *in->p++;
- if (b == 0xff) {
- m = *in->p++;
- if (m != 0) {
- if (m == M_EOF) {
- if (in->func) {
- m = in->func(in->data);
- if (m == 0)
- continue;
- }
- }
- in->marker = m;
- if (le <= 16)
- bi = bi << 16, le += 16;
- break;
- }
- }
- bi = bi << 8 | b;
- le += 8;
+ /* Relatively arbitrary limit that shouldn't hurt anybody.
+ * 300M (10k*10k*3bytes/pixel) is already larger than our heap, so
+ * it's on the safe side.
+ * This avoids overflows when width or height are used for
+ * calculations in this function.
+ */
+ if ((width > 10000) || (height > 10000)) {
+ return JPEG_DECODE_FAILED;
}
- in->bits = bi; /* tmp... 2 return values needed */
- return le;
-}
-
-static int dec_readmarker(struct in *in)
-{
- int m;
-
- in->left = fillbits(in, in->left, in->bits);
- m = in->marker;
- if (m == 0)
- return 0;
- in->left = 0;
- in->marker = 0;
- return m;
-}
-
-#define LEBI_DCL int le, bi
-#define LEBI_GET(in) (le = in->left, bi = in->bits)
-#define LEBI_PUT(in) (in->left = le, in->bits = bi)
-
-#define GETBITS(in, n) ( \
- (le < (n) ? le = fillbits(in, le, bi), bi = in->bits : 0), \
- (le -= (n)), \
- bi >> le & ((1 << (n)) - 1) \
- )
-
-#define UNGETBITS(in, n) ( \
- le += (n) \
-)
-
-static int dec_rec2(struct in *in, struct dec_hufftbl *hu, int *runp, int c,
- int i)
-{
- LEBI_DCL;
-
- LEBI_GET(in);
- if (i) {
- UNGETBITS(in, i & 127);
- *runp = i >> 8 & 15;
- i >>= 16;
- } else {
- for (i = DECBITS; (c = ((c << 1) | GETBITS(in, 1)))
- >= (hu->maxcode[i]); i++)
- ;
- if (i >= 16) {
- in->marker = M_BADHUFF;
- return 0;
- }
- i = hu->vals[hu->valptr[i] + c - hu->maxcode[i - 1] * 2];
- *runp = i >> 4;
- i &= 15;
- }
- if (i == 0) { /* sigh, 0xf0 is 11 bit */
- LEBI_PUT(in);
- return 0;
+ uint32_t pixfmt;
+ switch (depth) {
+ case 16:
+ pixfmt = WUFFS_BASE__PIXEL_FORMAT__BGR_565;
+ break;
+ case 24:
+ pixfmt = WUFFS_BASE__PIXEL_FORMAT__BGR;
+ break;
+ case 32:
+ pixfmt = WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL;
+ break;
+ default:
+ return JPEG_DECODE_FAILED;
}
- /* receive part */
- c = GETBITS(in, i);
- if (c < (1 << (i - 1)))
- c += (-1 << i) + 1;
- LEBI_PUT(in);
- return c;
-}
-
-#define DEC_REC(in, hu, r, i) ( \
- r = GETBITS(in, DECBITS), \
- i = hu->llvals[r], \
- i & 128 ? \
- ( \
- UNGETBITS(in, i & 127), \
- r = i >> 8 & 15, \
- i >> 16 \
- ) \
- : \
- ( \
- LEBI_PUT(in), \
- i = dec_rec2(in, hu, &r, r, i), \
- LEBI_GET(in), \
- i \
- ) \
-)
-static void decode_mcus(struct in *in, int *dct, int n, struct scan *sc,
- int *maxp)
-{
- struct dec_hufftbl *hu;
- int i, r, t;
- LEBI_DCL;
-
- memset(dct, 0, n * 64 * sizeof(*dct));
- LEBI_GET(in);
- while (n-- > 0) {
- hu = sc->hudc.dhuff;
- *dct++ = (sc->dc += DEC_REC(in, hu, r, t));
-
- hu = sc->huac.dhuff;
- i = 63;
- while (i > 0) {
- t = DEC_REC(in, hu, r, t);
- if (t == 0 && r == 0) {
- dct += i;
- break;
- }
- dct += r;
- *dct++ = t;
- i -= r + 1;
- }
- *maxp++ = 64 - i;
- if (n == sc->next)
- sc++;
+ wuffs_base__status status = wuffs_jpeg__decoder__initialize(
+ &dec, sizeof(dec), WUFFS_VERSION, WUFFS_INITIALIZE__DEFAULT_OPTIONS);
+ if (status.repr) {
+ return JPEG_DECODE_FAILED;
}
- LEBI_PUT(in);
-}
-static void dec_makehuff(struct dec_hufftbl *hu, int *hufflen,
- unsigned char *huffvals)
-{
- int code, k, i, j, d, x, c, v;
- for (i = 0; i < (1 << DECBITS); i++)
- hu->llvals[i] = 0;
-
-/*
- * llvals layout:
- *
- * value v already known, run r, backup u bits:
- * vvvvvvvvvvvvvvvv 0000 rrrr 1 uuuuuuu
- * value unknown, size b bits, run r, backup u bits:
- * 000000000000bbbb 0000 rrrr 0 uuuuuuu
- * value and size unknown:
- * 0000000000000000 0000 0000 0 0000000
- */
- code = 0;
- k = 0;
- for (i = 0; i < 16; i++, code <<= 1) { /* sizes */
- hu->valptr[i] = k;
- for (j = 0; j < hufflen[i]; j++) {
- hu->vals[k] = *huffvals++;
- if (i < DECBITS) {
- c = code << (DECBITS - 1 - i);
- v = hu->vals[k] & 0x0f; /* size */
- for (d = 1 << (DECBITS - 1 - i); --d >= 0;) {
- /* both fit in table */
- if (v + i < DECBITS) {
- x = d >> (DECBITS - 1 - v -
- i);
- if (v && x < (1 << (v - 1)))
- x += (-1 << v) + 1;
- x = x << 16 | (hu->vals[k]
- & 0xf0) << 4 |
- (DECBITS - (i + 1 + v))
- | 128;
- } else
- x = v << 16 | (hu->vals[k]
- & 0xf0) << 4 |
- (DECBITS - (i + 1));
- hu->llvals[c | d] = x;
- }
- }
- code++;
- k++;
- }
- hu->maxcode[i] = code;
+ wuffs_base__image_config imgcfg;
+ wuffs_base__io_buffer src = wuffs_base__ptr_u8__reader(filedata, filesize, true);
+ status = wuffs_jpeg__decoder__decode_image_config(&dec, &imgcfg, &src);
+ if (status.repr) {
+ return JPEG_DECODE_FAILED;
}
- hu->maxcode[16] = 0x20000; /* always terminate decode */
-}
-
-/****************************************************************/
-/************** idct ***************/
-/****************************************************************/
-
-#define ONE ((PREC)IFIX(1.))
-#define S2 ((PREC)IFIX(0.382683432))
-#define C2 ((PREC)IFIX(0.923879532))
-#define C4 ((PREC)IFIX(0.707106781))
-
-#define S22 ((PREC)IFIX(2 * 0.382683432))
-#define C22 ((PREC)IFIX(2 * 0.923879532))
-#define IC4 ((PREC)IFIX(1 / 0.707106781))
-
-#define C3IC1 ((PREC)IFIX(0.847759065)) /* c3/c1 */
-#define C5IC1 ((PREC)IFIX(0.566454497)) /* c5/c1 */
-#define C7IC1 ((PREC)IFIX(0.198912367)) /* c7/c1 */
-
-#define XPP(a, b) (t = a + b, b = a - b, a = t)
-#define XMP(a, b) (t = a - b, b = a + b, a = t)
-#define XPM(a, b) (t = a + b, b = b - a, a = t)
-
-#define ROT(a, b, s, c) (t = IMULT(a + b, s), \
- a = IMULT(a, c - s) + t, \
- b = IMULT(b, c + s) - t)
-#define IDCT \
-( \
- XPP(t0, t1), \
- XMP(t2, t3), \
- t2 = IMULT(t2, IC4) - t3, \
- XPP(t0, t3), \
- XPP(t1, t2), \
- XMP(t4, t7), \
- XPP(t5, t6), \
- XMP(t5, t7), \
- t5 = IMULT(t5, IC4), \
- ROT(t4, t6, S22, C22), \
- t6 -= t7, \
- t5 -= t6, \
- t4 -= t5, \
- XPP(t0, t7), \
- XPP(t1, t6), \
- XPP(t2, t5), \
- XPP(t3, t4) \
-)
+ wuffs_base__pixel_config pixcfg;
+ wuffs_base__pixel_config__set(&pixcfg, pixfmt, 0, width, height);
-static unsigned char zig2[64] = {
- 0, 2, 3, 9, 10, 20, 21, 35,
- 14, 16, 25, 31, 39, 46, 50, 57,
- 5, 7, 12, 18, 23, 33, 37, 48,
- 27, 29, 41, 44, 52, 55, 59, 62,
- 15, 26, 30, 40, 45, 51, 56, 58,
- 1, 4, 8, 11, 19, 22, 34, 36,
- 28, 42, 43, 53, 54, 60, 61, 63,
- 6, 13, 17, 24, 32, 38, 47, 49
-};
-
-void idct(int *in, int *out, PREC *lquant, PREC off, int max)
-{
- PREC t0, t1, t2, t3, t4, t5, t6, t7, t;
- PREC tmp[64], *tmpp;
- int i, j;
- unsigned char *zig2p;
-
- t0 = off;
- if (max == 1) {
- t0 += in[0] * lquant[0];
- for (i = 0; i < 64; i++)
- out[i] = ITOINT(t0);
- return;
- }
- zig2p = zig2;
- tmpp = tmp;
- for (i = 0; i < 8; i++) {
- j = *zig2p++;
- t0 += in[j] * lquant[j];
- j = *zig2p++;
- t5 = in[j] * lquant[j];
- j = *zig2p++;
- t2 = in[j] * lquant[j];
- j = *zig2p++;
- t7 = in[j] * lquant[j];
- j = *zig2p++;
- t1 = in[j] * lquant[j];
- j = *zig2p++;
- t4 = in[j] * lquant[j];
- j = *zig2p++;
- t3 = in[j] * lquant[j];
- j = *zig2p++;
- t6 = in[j] * lquant[j];
- IDCT;
- tmpp[0 * 8] = t0;
- tmpp[1 * 8] = t1;
- tmpp[2 * 8] = t2;
- tmpp[3 * 8] = t3;
- tmpp[4 * 8] = t4;
- tmpp[5 * 8] = t5;
- tmpp[6 * 8] = t6;
- tmpp[7 * 8] = t7;
- tmpp++;
- t0 = 0;
- }
- for (i = 0; i < 8; i++) {
- t0 = tmp[8 * i + 0];
- t1 = tmp[8 * i + 1];
- t2 = tmp[8 * i + 2];
- t3 = tmp[8 * i + 3];
- t4 = tmp[8 * i + 4];
- t5 = tmp[8 * i + 5];
- t6 = tmp[8 * i + 6];
- t7 = tmp[8 * i + 7];
- IDCT;
- out[8 * i + 0] = ITOINT(t0);
- out[8 * i + 1] = ITOINT(t1);
- out[8 * i + 2] = ITOINT(t2);
- out[8 * i + 3] = ITOINT(t3);
- out[8 * i + 4] = ITOINT(t4);
- out[8 * i + 5] = ITOINT(t5);
- out[8 * i + 6] = ITOINT(t6);
- out[8 * i + 7] = ITOINT(t7);
+ wuffs_base__pixel_buffer pixbuf;
+ status = wuffs_base__pixel_buffer__set_interleaved(
+ &pixbuf, &pixcfg,
+ wuffs_base__make_table_u8(pic, width * (depth / 8), height, bytes_per_line),
+ wuffs_base__empty_slice_u8());
+ if (status.repr) {
+ return JPEG_DECODE_FAILED;
}
-}
-
-static unsigned char zig[64] = {
- 0, 1, 5, 6, 14, 15, 27, 28,
- 2, 4, 7, 13, 16, 26, 29, 42,
- 3, 8, 12, 17, 25, 30, 41, 43,
- 9, 11, 18, 24, 31, 40, 44, 53,
- 10, 19, 23, 32, 39, 45, 52, 54,
- 20, 22, 33, 38, 46, 51, 55, 60,
- 21, 34, 37, 47, 50, 56, 59, 61,
- 35, 36, 48, 49, 57, 58, 62, 63
-};
-
-static PREC aaidct[8] = {
- IFIX(0.3535533906), IFIX(0.4903926402),
- IFIX(0.4619397663), IFIX(0.4157348062),
- IFIX(0.3535533906), IFIX(0.2777851165),
- IFIX(0.1913417162), IFIX(0.0975451610)
-};
-
-static void idctqtab(unsigned char *qin, PREC *qout)
-{
- int i, j;
-
- for (i = 0; i < 8; i++)
- for (j = 0; j < 8; j++)
- qout[zig[i * 8 + j]] = qin[zig[i * 8 + j]] *
- IMULT(aaidct[i], aaidct[j]);
-}
-
-static void scaleidctqtab(PREC *q, PREC sc)
-{
- int i;
-
- for (i = 0; i < 64; i++)
- q[i] = IMULT(q[i], sc);
-}
-
-/****************************************************************/
-/************** color decoder ***************/
-/****************************************************************/
-
-#define ROUND
-
-/*
- * YCbCr Color transformation:
- *
- * y:0..255 Cb:-128..127 Cr:-128..127
- *
- * R = Y + 1.40200 * Cr
- * G = Y - 0.34414 * Cb - 0.71414 * Cr
- * B = Y + 1.77200 * Cb
- *
- * =>
- * Cr *= 1.40200;
- * Cb *= 1.77200;
- * Cg = 0.19421 * Cb + .50937 * Cr;
- * R = Y + Cr;
- * G = Y - Cg;
- * B = Y + Cb;
- *
- * =>
- * Cg = (50 * Cb + 130 * Cr + 128) >> 8;
- */
-
-static void initcol(PREC q[][64])
-{
- scaleidctqtab(q[1], IFIX(1.77200));
- scaleidctqtab(q[2], IFIX(1.40200));
-}
-
-/* This is optimized for the stupid sun SUNWspro compiler. */
-#define STORECLAMP(a, x) \
-( \
- (a) = (x), \
- (unsigned int)(x) >= 256 ? \
- ((a) = (x) < 0 ? 0 : 255) \
- : \
- 0 \
-)
-
-#define CLAMP(x) ((unsigned int)(x) >= 256 ? ((x) < 0 ? 0 : 255) : (x))
-
-#ifdef ROUND
-
-#define CBCRCG(yin, xin) \
-( \
- cb = outc[0 + yin * 8 + xin], \
- cr = outc[64 + yin * 8 + xin], \
- cg = (50 * cb + 130 * cr + 128) >> 8 \
-)
-
-#else
-
-#define CBCRCG(yin, xin) \
-( \
- cb = outc[0 + yin*8 + xin], \
- cr = outc[64 + yin*8 + xin], \
- cg = (3 * cb + 8 * cr) >> 4 \
-)
-
-#endif
-
-#define PIC(yin, xin, p, xout) \
-( \
- y = outy[(yin) * 8 + xin], \
- STORECLAMP(p[(xout) * 3 + 0], y + cr), \
- STORECLAMP(p[(xout) * 3 + 1], y - cg), \
- STORECLAMP(p[(xout) * 3 + 2], y + cb) \
-)
-
-#ifdef __LITTLE_ENDIAN
-#define PIC_16(yin, xin, p, xout, add) \
-( \
- y = outy[(yin) * 8 + xin], \
- y = ((CLAMP(y + cr + add*2+1) & 0xf8) << 8) | \
- ((CLAMP(y - cg + add) & 0xfc) << 3) | \
- ((CLAMP(y + cb + add*2+1)) >> 3), \
- p[(xout) * 2 + 0] = y & 0xff, \
- p[(xout) * 2 + 1] = y >> 8 \
-)
-#else
-#ifdef CONFIG_PPC
-#define PIC_16(yin, xin, p, xout, add) \
-( \
- y = outy[(yin) * 8 + xin], \
- y = ((CLAMP(y + cr + add*2+1) & 0xf8) << 7) | \
- ((CLAMP(y - cg + add*2+1) & 0xf8) << 2) | \
- ((CLAMP(y + cb + add*2+1)) >> 3), \
- p[(xout) * 2 + 0] = y >> 8, \
- p[(xout) * 2 + 1] = y & 0xff \
-)
-#else
-#define PIC_16(yin, xin, p, xout, add) \
-( \
- y = outy[(yin) * 8 + xin], \
- y = ((CLAMP(y + cr + add*2+1) & 0xf8) << 8) | \
- ((CLAMP(y - cg + add) & 0xfc) << 3) | \
- ((CLAMP(y + cb + add*2+1)) >> 3), \
- p[(xout) * 2 + 0] = y >> 8, \
- p[(xout) * 2 + 1] = y & 0xff \
-)
-#endif
-#endif
-
-#define PIC_32(yin, xin, p, xout) \
-( \
- y = outy[(yin) * 8 + xin], \
- STORECLAMP(p[(xout) * 4 + 0], y + cr), \
- STORECLAMP(p[(xout) * 4 + 1], y - cg), \
- STORECLAMP(p[(xout) * 4 + 2], y + cb), \
- p[(xout) * 4 + 3] = 0 \
-)
-
-#define PIC221111(xin) \
-( \
- CBCRCG(0, xin), \
- PIC(xin / 4 * 8 + 0, (xin & 3) * 2 + 0, pic0, xin * 2 + 0), \
- PIC(xin / 4 * 8 + 0, (xin & 3) * 2 + 1, pic0, xin * 2 + 1), \
- PIC(xin / 4 * 8 + 1, (xin & 3) * 2 + 0, pic1, xin * 2 + 0), \
- PIC(xin / 4 * 8 + 1, (xin & 3) * 2 + 1, pic1, xin * 2 + 1) \
-)
-
-#define PIC221111_16(xin) \
-( \
- CBCRCG(0, xin), \
- PIC_16(xin / 4 * 8 + 0, (xin & 3) * 2 + 0, pic0, xin * 2 + 0, 3), \
- PIC_16(xin / 4 * 8 + 0, (xin & 3) * 2 + 1, pic0, xin * 2 + 1, 0), \
- PIC_16(xin / 4 * 8 + 1, (xin & 3) * 2 + 0, pic1, xin * 2 + 0, 1), \
- PIC_16(xin / 4 * 8 + 1, (xin & 3) * 2 + 1, pic1, xin * 2 + 1, 2) \
-)
-
-#define PIC221111_32(xin) \
-( \
- CBCRCG(0, xin), \
- PIC_32(xin / 4 * 8 + 0, (xin & 3) * 2 + 0, pic0, xin * 2 + 0), \
- PIC_32(xin / 4 * 8 + 0, (xin & 3) * 2 + 1, pic0, xin * 2 + 1), \
- PIC_32(xin / 4 * 8 + 1, (xin & 3) * 2 + 0, pic1, xin * 2 + 0), \
- PIC_32(xin / 4 * 8 + 1, (xin & 3) * 2 + 1, pic1, xin * 2 + 1) \
-)
-
-static void col221111(int *out, unsigned char *pic, int width)
-{
- int i, j, k;
- unsigned char *pic0, *pic1;
- int *outy, *outc;
- int cr, cg, cb, y;
-
- pic0 = pic;
- pic1 = pic + width;
- outy = out;
- outc = out + 64 * 4;
- for (i = 2; i > 0; i--) {
- for (j = 4; j > 0; j--) {
- for (k = 0; k < 8; k++)
- PIC221111(k);
- outc += 8;
- outy += 16;
- pic0 += 2 * width;
- pic1 += 2 * width;
- }
- outy += 64 * 2 - 16 * 4;
+ uint64_t workbuf_len_min_incl = wuffs_jpeg__decoder__workbuf_len(&dec).min_incl;
+ uint8_t *workbuf_array = malloc(workbuf_len_min_incl);
+ if ((workbuf_array == NULL) && workbuf_len_min_incl) {
+ return JPEG_DECODE_FAILED;
}
-}
-static void col221111_16(int *out, unsigned char *pic, int width)
-{
- int i, j, k;
- unsigned char *pic0, *pic1;
- int *outy, *outc;
- int cr, cg, cb, y;
+ wuffs_base__slice_u8 workbuf =
+ wuffs_base__make_slice_u8(workbuf_array, workbuf_len_min_incl);
+ status = wuffs_jpeg__decoder__decode_frame(&dec, &pixbuf, &src,
+ WUFFS_BASE__PIXEL_BLEND__SRC, workbuf, NULL);
- pic0 = pic;
- pic1 = pic + width;
- outy = out;
- outc = out + 64 * 4;
- for (i = 2; i > 0; i--) {
- for (j = 4; j > 0; j--) {
- for (k = 0; k < 8; k++)
- PIC221111_16(k);
- outc += 8;
- outy += 16;
- pic0 += 2 * width;
- pic1 += 2 * width;
- }
- outy += 64 * 2 - 16 * 4;
- }
-}
+ free(workbuf_array);
-static void col221111_32(int *out, unsigned char *pic, int width)
-{
- int i, j, k;
- unsigned char *pic0, *pic1;
- int *outy, *outc;
- int cr, cg, cb, y;
-
- pic0 = pic;
- pic1 = pic + width;
- outy = out;
- outc = out + 64 * 4;
- for (i = 2; i > 0; i--) {
- for (j = 4; j > 0; j--) {
- for (k = 0; k < 8; k++)
- PIC221111_32(k);
- outc += 8;
- outy += 16;
- pic0 += 2 * width;
- pic1 += 2 * width;
- }
- outy += 64 * 2 - 16 * 4;
+ if (status.repr) {
+ return JPEG_DECODE_FAILED;
}
+
+ return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-13 10:17:16 +0000