Add support for allocating heap instead of stack memory
This can be enabled by defining `QUIRC_USE_HEAP`. Define this before import, or add `-D QUIRC_USE_HEAP` flag while compiling.
This commit is contained in:
MU-Software
parent
516d91a94d
commit
18c27d6dd5
2 changed files with 134 additions and 43 deletions
161
lib/decode.c
161
lib/decode.c
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@ -179,15 +179,19 @@ static void berlekamp_massey(const uint8_t *s, int N,
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const struct galois_field *gf,
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uint8_t *sigma)
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{
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uint8_t C[MAX_POLY];
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uint8_t B[MAX_POLY];
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#ifdef QUIRC_USE_HEAP
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uint8_t *C = (uint8_t*)calloc(MAX_POLY, sizeof(uint8_t));
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uint8_t *B = (uint8_t*)calloc(MAX_POLY, sizeof(uint8_t));
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#else
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uint8_t C[MAX_POLY] = {0};
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uint8_t B[MAX_POLY] = {0};
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#endif
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int L = 0;
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int m = 1;
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uint8_t b = 1;
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int n;
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memset(B, 0, sizeof(B));
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memset(C, 0, sizeof(C));
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B[0] = 1;
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C[0] = 1;
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@ -210,21 +214,35 @@ static void berlekamp_massey(const uint8_t *s, int N,
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if (!d) {
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m++;
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} else if (L * 2 <= n) {
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uint8_t T[MAX_POLY];
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#ifdef QUIRC_USE_HEAP
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uint8_t *T = (uint8_t*)calloc(MAX_POLY, sizeof(uint8_t));
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#else
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uint8_t T[MAX_POLY] = {0};
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#endif
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memcpy(T, C, sizeof(T));
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memcpy(T, C, sizeof(uint8_t) * MAX_POLY);
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poly_add(C, B, mult, m, gf);
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memcpy(B, T, sizeof(B));
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memcpy(B, T, sizeof(uint8_t) * MAX_POLY);
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L = n + 1 - L;
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b = d;
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m = 1;
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#ifdef QUIRC_USE_HEAP
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free(T);
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#endif
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} else {
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poly_add(C, B, mult, m, gf);
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m++;
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}
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}
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memcpy(sigma, C, MAX_POLY);
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memcpy(sigma, C, sizeof(uint8_t) * MAX_POLY);
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#ifdef QUIRC_USE_HEAP
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free(B);
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free(C);
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#endif
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}
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/************************************************************************
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@ -238,7 +256,7 @@ static int block_syndromes(const uint8_t *data, int bs, int npar, uint8_t *s)
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int nonzero = 0;
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int i;
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memset(s, 0, MAX_POLY);
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memset(s, 0, sizeof(uint8_t) * MAX_POLY);
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for (i = 0; i < npar; i++) {
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int j;
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@ -266,7 +284,7 @@ static void eloc_poly(uint8_t *omega,
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{
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int i;
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memset(omega, 0, MAX_POLY);
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memset(omega, 0, sizeof(uint8_t) * MAX_POLY);
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for (i = 0; i < npar; i++) {
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const uint8_t a = sigma[i];
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@ -295,20 +313,36 @@ static quirc_decode_error_t correct_block(uint8_t *data,
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const struct quirc_rs_params *ecc)
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{
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int npar = ecc->bs - ecc->dw;
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uint8_t s[MAX_POLY];
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uint8_t sigma[MAX_POLY];
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uint8_t sigma_deriv[MAX_POLY];
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uint8_t omega[MAX_POLY];
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int i;
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#ifdef QUIRC_USE_HEAP
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uint8_t *s = (uint8_t*)calloc(MAX_POLY, sizeof(uint8_t));
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#else
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uint8_t s[MAX_POLY] = {0};
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#endif
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/* Compute syndrome vector */
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if (!block_syndromes(data, ecc->bs, npar, s))
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if (!block_syndromes(data, ecc->bs, npar, s)) {
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#ifdef QUIRC_USE_HEAP
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free(s);
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#endif
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return QUIRC_SUCCESS;
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}
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#ifdef QUIRC_USE_HEAP
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uint8_t *sigma = (uint8_t*)calloc(MAX_POLY, sizeof(uint8_t));
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uint8_t *sigma_deriv = (uint8_t*)calloc(MAX_POLY, sizeof(uint8_t));
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uint8_t *omega = (uint8_t*)calloc(MAX_POLY, sizeof(uint8_t));
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#else
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uint8_t sigma[MAX_POLY] = {0};
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uint8_t sigma_deriv[MAX_POLY] = {0};
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uint8_t omega[MAX_POLY] = {0};
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#endif
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berlekamp_massey(s, npar, &gf256, sigma);
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/* Compute derivative of sigma */
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memset(sigma_deriv, 0, MAX_POLY);
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for (i = 0; i + 1 < MAX_POLY; i += 2)
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sigma_deriv[i] = sigma[i + 1];
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@ -329,8 +363,23 @@ static quirc_decode_error_t correct_block(uint8_t *data,
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}
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}
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if (block_syndromes(data, ecc->bs, npar, s))
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#ifdef QUIRC_USE_HEAP
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free(sigma);
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free(sigma_deriv);
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free(omega);
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#endif
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if (block_syndromes(data, ecc->bs, npar, s)){
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#ifdef QUIRC_USE_HEAP
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free(s);
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#endif
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return QUIRC_ERROR_DATA_ECC;
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}
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#ifdef QUIRC_USE_HEAP
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free(s);
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#endif
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return QUIRC_SUCCESS;
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}
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@ -350,7 +399,7 @@ static int format_syndromes(uint16_t u, uint8_t *s)
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int i;
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int nonzero = 0;
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memset(s, 0, MAX_POLY);
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memset(s, 0, sizeof(uint8_t) * MAX_POLY);
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for (i = 0; i < FORMAT_SYNDROMES; i++) {
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int j;
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@ -371,14 +420,28 @@ static quirc_decode_error_t correct_format(uint16_t *f_ret)
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{
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uint16_t u = *f_ret;
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int i;
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uint8_t s[MAX_POLY];
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uint8_t sigma[MAX_POLY];
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#ifdef QUIRC_USE_HEAP
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uint8_t *s = (uint8_t*)calloc(MAX_POLY, sizeof(uint8_t));
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#else
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uint8_t s[MAX_POLY] = {0};
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#endif
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/* Evaluate U (received codeword) at each of alpha_1 .. alpha_6
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* to get S_1 .. S_6 (but we index them from 0).
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*/
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if (!format_syndromes(u, s))
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if (!format_syndromes(u, s)) {
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#ifdef QUIRC_USE_HEAP
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free(s);
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#endif
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return QUIRC_SUCCESS;
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}
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#ifdef QUIRC_USE_HEAP
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uint8_t *sigma = (uint8_t*)calloc(MAX_POLY, sizeof(uint8_t));
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#else
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uint8_t sigma[MAX_POLY] = {0};
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#endif
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berlekamp_massey(s, FORMAT_SYNDROMES, &gf16, sigma);
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@ -387,6 +450,10 @@ static quirc_decode_error_t correct_format(uint16_t *f_ret)
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if (!poly_eval(sigma, gf16_exp[15 - i], &gf16))
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u ^= (1 << i);
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#ifdef QUIRC_USE_HEAP
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free(sigma);
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#endif
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if (format_syndromes(u, s))
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return QUIRC_ERROR_FORMAT_ECC;
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@ -884,29 +951,34 @@ quirc_decode_error_t quirc_decode(const struct quirc_code *code,
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struct quirc_data *data)
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{
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quirc_decode_error_t err;
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struct datastream ds;
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if (code->size > QUIRC_MAX_GRID_SIZE)
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return QUIRC_ERROR_INVALID_GRID_SIZE;
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#ifdef QUIRC_USE_HEAP
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struct datastream *dsp = (struct datastream*)calloc(1, sizeof(struct datastream));
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#else
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struct datastream ds = {0};
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struct datastream *dsp = &ds;
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#endif
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if ((code->size - 17) % 4)
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return QUIRC_ERROR_INVALID_GRID_SIZE;
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memset(data, 0, sizeof(struct quirc_data) * 1);
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memset(data, 0, sizeof(*data));
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memset(&ds, 0, sizeof(ds));
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if (code->size > QUIRC_MAX_GRID_SIZE || (code->size - 17) % 4) {
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err = QUIRC_ERROR_INVALID_GRID_SIZE;
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goto on_error;
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}
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data->version = (code->size - 17) / 4;
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if (data->version < 1 ||
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data->version > QUIRC_MAX_VERSION)
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return QUIRC_ERROR_INVALID_VERSION;
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if (data->version < 1 || data->version > QUIRC_MAX_VERSION) {
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err = QUIRC_ERROR_INVALID_VERSION;
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goto on_error;
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}
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/* Read format information -- try both locations */
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err = read_format(code, data, 0);
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if (err)
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err = read_format(code, data, 1);
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if (err)
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return err;
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goto on_error;
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/*
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* Borrow data->payload to store the raw bits.
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@ -916,20 +988,31 @@ quirc_decode_error_t quirc_decode(const struct quirc_code *code,
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* on the stack.
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*/
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ds.raw = data->payload;
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dsp->raw = data->payload;
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read_data(code, data, &ds);
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err = codestream_ecc(data, &ds);
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read_data(code, data, dsp);
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err = codestream_ecc(data, dsp);
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if (err)
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return err;
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goto on_error;
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ds.raw = NULL; /* We've done with this buffer. */
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dsp->raw = NULL; /* We've done with this buffer. */
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err = decode_payload(data, &ds);
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err = decode_payload(data, dsp);
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if (err)
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return err;
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goto on_error;
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#ifdef QUIRC_USE_HEAP
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free(dsp);
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#endif
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return QUIRC_SUCCESS;
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on_error:
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#ifdef QUIRC_USE_HEAP
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free(dsp);
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#endif
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return err;
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}
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void quirc_flip(struct quirc_code *code)
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@ -289,8 +289,12 @@ static uint8_t otsu(const struct quirc *q)
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unsigned int numPixels = q->w * q->h;
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// Calculate histogram
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unsigned int histogram[UINT8_MAX + 1];
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(void)memset(histogram, 0, sizeof(histogram));
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#ifdef QUIRC_USE_HEAP
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unsigned int *histogram = (unsigned int*)calloc(UINT8_MAX + 1, sizeof(unsigned int));
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#else
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unsigned int histogram[UINT8_MAX + 1] = {0};
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#endif
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uint8_t* ptr = q->image;
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unsigned int length = numPixels;
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while (length--) {
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@ -332,6 +336,10 @@ static uint8_t otsu(const struct quirc *q)
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}
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}
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#ifdef QUIRC_USE_HEAP
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free(histogram);
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#endif
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return threshold;
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}
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