| /* |
| * Copyright (c) 2017, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| * Media Patent License 1.0 was not distributed with this source code in the |
| * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| */ |
| |
| #include "third_party/googletest/src/googletest/include/gtest/gtest.h" |
| |
| #include <cstdlib> |
| #include <memory> |
| #include <new> |
| |
| #include "aom_dsp/entenc.h" |
| #include "aom_dsp/entdec.h" |
| |
| TEST(EC_TEST, random_ec_test) { |
| od_ec_enc enc; |
| od_ec_dec dec; |
| int sz; |
| int i; |
| int ret; |
| unsigned int seed; |
| unsigned char *ptr; |
| uint32_t ptr_sz; |
| char *seed_str; |
| ret = 0; |
| seed_str = getenv("EC_TEST_SEED"); |
| if (seed_str) { |
| seed = atoi(seed_str); |
| } else { |
| seed = 0xdaa1a; |
| } |
| srand(seed); |
| od_ec_enc_init(&enc, 1); |
| /*Test compatibility between multiple different encode/decode routines.*/ |
| for (i = 0; i < 409600; i++) { |
| int j; |
| sz = rand() / ((RAND_MAX >> (rand() % 9U)) + 1U); |
| std::unique_ptr<unsigned[]> fz(new (std::nothrow) unsigned[sz]); |
| ASSERT_NE(fz, nullptr); |
| std::unique_ptr<unsigned[]> fts(new (std::nothrow) unsigned[sz]); |
| ASSERT_NE(fts, nullptr); |
| std::unique_ptr<unsigned[]> data(new (std::nothrow) unsigned[sz]); |
| ASSERT_NE(data, nullptr); |
| std::unique_ptr<unsigned[]> tell(new (std::nothrow) unsigned[sz + 1]); |
| ASSERT_NE(tell, nullptr); |
| std::unique_ptr<unsigned[]> enc_method(new (std::nothrow) unsigned[sz]); |
| ASSERT_NE(enc_method, nullptr); |
| od_ec_enc_reset(&enc); |
| tell[0] = od_ec_enc_tell_frac(&enc); |
| for (j = 0; j < sz; j++) { |
| data[j] = rand() / ((RAND_MAX >> 1) + 1); |
| |
| fts[j] = CDF_PROB_BITS; |
| fz[j] = (rand() % (CDF_PROB_TOP - 2)) >> (CDF_PROB_BITS - fts[j]); |
| fz[j] = OD_MAXI(fz[j], 1); |
| enc_method[j] = 3 + (rand() & 1); |
| switch (enc_method[j]) { |
| case 3: { |
| od_ec_encode_bool_q15(&enc, data[j], |
| OD_ICDF(fz[j] << (CDF_PROB_BITS - fts[j]))); |
| break; |
| } |
| case 4: { |
| uint16_t cdf[2]; |
| cdf[0] = OD_ICDF(fz[j]); |
| cdf[1] = OD_ICDF(1U << fts[j]); |
| od_ec_encode_cdf_q15(&enc, data[j], cdf, 2); |
| break; |
| } |
| } |
| |
| tell[j + 1] = od_ec_enc_tell_frac(&enc); |
| } |
| ptr = od_ec_enc_done(&enc, &ptr_sz); |
| EXPECT_GE(((od_ec_enc_tell(&enc) + 7U) >> 3), ptr_sz) |
| << "od_ec_enc_tell() lied: " |
| "there's " |
| << ptr_sz << " bytes instead of " << ((od_ec_enc_tell(&enc) + 7) >> 3) |
| << " (Random seed: " << seed << ")\n"; |
| od_ec_dec_init(&dec, ptr, ptr_sz); |
| EXPECT_EQ(od_ec_dec_tell_frac(&dec), tell[0]) |
| << "od_ec_dec_tell() mismatch between encoder and decoder " |
| "at symbol 0: " |
| << (unsigned)od_ec_dec_tell_frac(&dec) << " instead of " << tell[0] |
| << " (Random seed: " << seed << ").\n"; |
| for (j = 0; j < sz; j++) { |
| int dec_method; |
| unsigned int sym = data[j] + 1; // Initialize sym to an invalid value. |
| |
| if (CDF_SHIFT == 0) { |
| dec_method = 3 + (rand() & 1); |
| } else { |
| dec_method = enc_method[j]; |
| } |
| switch (dec_method) { |
| case 3: { |
| sym = od_ec_decode_bool_q15( |
| &dec, OD_ICDF(fz[j] << (CDF_PROB_BITS - fts[j]))); |
| break; |
| } |
| case 4: { |
| uint16_t cdf[2]; |
| cdf[0] = OD_ICDF(fz[j]); |
| cdf[1] = OD_ICDF(1U << fts[j]); |
| sym = od_ec_decode_cdf_q15(&dec, cdf, 2); |
| break; |
| } |
| } |
| |
| EXPECT_EQ(sym, data[j]) |
| << "Decoded " << sym << " instead of " << data[j] |
| << " with fz=" << fz[j] << " and ftb=" << fts[j] << "at position " |
| << j << " of " << sz << " (Random seed: " << seed << ").\n" |
| << "Encoding method: " << enc_method[j] |
| << " decoding method: " << dec_method << "\n"; |
| EXPECT_EQ(od_ec_dec_tell_frac(&dec), tell[j + 1]) |
| << "od_ec_dec_tell() mismatch between encoder and " |
| "decoder at symbol " |
| << j + 1 << ": " << (unsigned)od_ec_dec_tell_frac(&dec) |
| << " instead of " << tell[j + 1] << " (Random seed: " << seed |
| << ").\n"; |
| } |
| } |
| od_ec_enc_reset(&enc); |
| if (CDF_SHIFT == 0) { |
| od_ec_encode_bool_q15(&enc, 0, OD_ICDF(16384)); |
| od_ec_encode_bool_q15(&enc, 0, OD_ICDF(16384)); |
| od_ec_encode_bool_q15(&enc, 0, OD_ICDF(16384)); |
| od_ec_encode_bool_q15(&enc, 0, OD_ICDF(16384)); |
| od_ec_encode_bool_q15(&enc, 0, OD_ICDF(24576)); |
| od_ec_enc_patch_initial_bits(&enc, 3, 2); |
| EXPECT_FALSE(enc.error) << "od_ec_enc_patch_initial_bits() failed.\n"; |
| od_ec_enc_patch_initial_bits(&enc, 0, 5); |
| EXPECT_TRUE(enc.error) |
| << "od_ec_enc_patch_initial_bits() didn't fail when it should have.\n"; |
| od_ec_enc_reset(&enc); |
| od_ec_encode_bool_q15(&enc, 0, OD_ICDF(16384)); |
| od_ec_encode_bool_q15(&enc, 0, OD_ICDF(16384)); |
| od_ec_encode_bool_q15(&enc, 1, OD_ICDF(32256)); |
| od_ec_encode_bool_q15(&enc, 0, OD_ICDF(24576)); |
| od_ec_enc_patch_initial_bits(&enc, 0, 2); |
| EXPECT_FALSE(enc.error) << "od_ec_enc_patch_initial_bits() failed.\n"; |
| ptr = od_ec_enc_done(&enc, &ptr_sz); |
| EXPECT_EQ(ptr_sz, 2u); |
| EXPECT_EQ(ptr[0], 63) |
| << "Got " << ptr[0] |
| << " when expecting 63 for od_ec_enc_patch_initial_bits().\n"; |
| } |
| od_ec_enc_clear(&enc); |
| EXPECT_EQ(ret, 0); |
| } |