bf82514b54
Replace vp9_ in names to vpx_ as they are not codec specific. Change-Id: I2e583aa63dee769353ada4b42417aa15c4074ebb
90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
/*
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* Copyright (c) 2012 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <math.h>
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#include <stdlib.h>
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#include <string.h>
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#include "third_party/googletest/src/include/gtest/gtest.h"
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#include "vpx/vpx_integer.h"
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#include "vpx_dsp/bitreader.h"
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#include "vpx_dsp/bitwriter.h"
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#include "test/acm_random.h"
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using libvpx_test::ACMRandom;
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namespace {
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const int num_tests = 10;
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} // namespace
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TEST(VP9, TestBitIO) {
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ACMRandom rnd(ACMRandom::DeterministicSeed());
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for (int n = 0; n < num_tests; ++n) {
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for (int method = 0; method <= 7; ++method) { // we generate various proba
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const int kBitsToTest = 1000;
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uint8_t probas[kBitsToTest];
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for (int i = 0; i < kBitsToTest; ++i) {
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const int parity = i & 1;
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probas[i] =
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(method == 0) ? 0 : (method == 1) ? 255 :
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(method == 2) ? 128 :
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(method == 3) ? rnd.Rand8() :
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(method == 4) ? (parity ? 0 : 255) :
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// alternate between low and high proba:
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(method == 5) ? (parity ? rnd(128) : 255 - rnd(128)) :
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(method == 6) ?
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(parity ? rnd(64) : 255 - rnd(64)) :
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(parity ? rnd(32) : 255 - rnd(32));
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}
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for (int bit_method = 0; bit_method <= 3; ++bit_method) {
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const int random_seed = 6432;
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const int kBufferSize = 10000;
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ACMRandom bit_rnd(random_seed);
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vp9_writer bw;
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uint8_t bw_buffer[kBufferSize];
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vp9_start_encode(&bw, bw_buffer);
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int bit = (bit_method == 0) ? 0 : (bit_method == 1) ? 1 : 0;
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for (int i = 0; i < kBitsToTest; ++i) {
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if (bit_method == 2) {
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bit = (i & 1);
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} else if (bit_method == 3) {
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bit = bit_rnd(2);
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}
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vp9_write(&bw, bit, static_cast<int>(probas[i]));
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}
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vp9_stop_encode(&bw);
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// First bit should be zero
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GTEST_ASSERT_EQ(bw_buffer[0] & 0x80, 0);
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vpx_reader br;
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vpx_reader_init(&br, bw_buffer, kBufferSize, NULL, NULL);
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bit_rnd.Reset(random_seed);
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for (int i = 0; i < kBitsToTest; ++i) {
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if (bit_method == 2) {
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bit = (i & 1);
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} else if (bit_method == 3) {
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bit = bit_rnd(2);
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}
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GTEST_ASSERT_EQ(vpx_read(&br, probas[i]), bit)
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<< "pos: " << i << " / " << kBitsToTest
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<< " bit_method: " << bit_method
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<< " method: " << method;
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}
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}
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}
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}
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}
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