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134 lines
4.7 KiB
134 lines
4.7 KiB
/*
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* Copyright 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//#define LOG_NDEBUG 0
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#define LOG_TAG "audio_utils_format_tests"
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#include <log/log.h>
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#include <audio_utils/format.h>
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#include <gtest/gtest.h>
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/** returns true if the format is a common source or destination format.
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memcpy_by_audio_format() allows interchange between any PCM format and the
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"common" PCM 16 bit and PCM float formats. */
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static bool is_common_src_format(audio_format_t format) {
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return format == AUDIO_FORMAT_PCM_16_BIT || format == AUDIO_FORMAT_PCM_FLOAT;
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}
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static bool is_common_dst_format(audio_format_t format) {
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return format == AUDIO_FORMAT_PCM_8_BIT // Allowed for HAL to AudioRecord conversion.
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|| format == AUDIO_FORMAT_PCM_16_BIT
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|| format == AUDIO_FORMAT_PCM_FLOAT;
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}
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// Initialize PCM 16 bit ramp for basic data validation (generated from PCM 8 bit data).
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// TODO: consider creating fillPseudoRandomValue().
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template<size_t size>
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static void fillRamp(int16_t(&buffer)[size])
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{
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// Create PCM 16 bit data based on PCM 8 bit format because PCM 8 bit is convertible
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// to all other audio formats without loss; hence, round trip conversion preserves equality.
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uint8_t bytes[size];
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for (size_t i = 0; i < size; ++i) {
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bytes[i] = i;
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}
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// convert to PCM 16 bit
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memcpy_by_audio_format(
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buffer, AUDIO_FORMAT_PCM_16_BIT,
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bytes, AUDIO_FORMAT_PCM_8_BIT, size);
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uint8_t check[size];
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memcpy_by_audio_format(
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check, AUDIO_FORMAT_PCM_8_BIT,
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buffer, AUDIO_FORMAT_PCM_16_BIT, size);
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EXPECT_EQ(0, memcmp(check, bytes, size));
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}
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class FormatTest : public testing::TestWithParam<std::tuple<audio_format_t, audio_format_t>>
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{
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};
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TEST_P(FormatTest, memcpy_by_audio_format)
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{
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// fetch parameters
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const auto param = GetParam();
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const audio_format_t src_encoding = std::get<0>(param);
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const audio_format_t dst_encoding = std::get<1>(param);
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// either source or destination (or both) need to be a common format
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if (!is_common_src_format(src_encoding) && !is_common_dst_format(dst_encoding)) {
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printf("skip conversion src:%#x dst:%#x\n", src_encoding, dst_encoding);
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return;
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}
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constexpr size_t SAMPLES = UINT8_MAX;
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constexpr audio_format_t orig_encoding = AUDIO_FORMAT_PCM_16_BIT;
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int16_t orig_data[SAMPLES];
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fillRamp(orig_data);
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// data buffer for in-place conversion (uint32_t is maximum sample size of 4 bytes)
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uint32_t data[SAMPLES];
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// check buffer is used to compare out-of-place vs in-place conversion.
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uint32_t check[SAMPLES];
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printf("trying conversion src:%#x dst:%#x\n", src_encoding, dst_encoding);
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fflush(stdout);
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// Copy original data to data buffer at src_encoding.
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memcpy_by_audio_format(
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data, src_encoding,
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orig_data, orig_encoding, SAMPLES);
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// Convert from src encoding to dst encoding.
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memcpy_by_audio_format(
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check, dst_encoding,
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data, src_encoding, SAMPLES);
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// Check in-place is same as out-of-place conversion.
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memcpy_by_audio_format(
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data, dst_encoding,
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data, src_encoding, SAMPLES);
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EXPECT_EQ(0, memcmp(check, data, SAMPLES * audio_bytes_per_sample(dst_encoding)));
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// Go back to the original data encoding for comparison.
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memcpy_by_audio_format(
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data, orig_encoding,
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data, dst_encoding, SAMPLES);
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// Raw byte compare at the original encoding must succeed - our conversions
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// must be lossless for PCM 8 bit representation which orig_data was constructed from.
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EXPECT_EQ(0,
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memcmp(data, orig_data, SAMPLES * audio_bytes_per_sample(orig_encoding)));
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}
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INSTANTIATE_TEST_CASE_P(FormatVariations, FormatTest, ::testing::Combine(
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::testing::Values(
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AUDIO_FORMAT_PCM_8_BIT,
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AUDIO_FORMAT_PCM_16_BIT,
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AUDIO_FORMAT_PCM_FLOAT,
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AUDIO_FORMAT_PCM_24_BIT_PACKED,
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AUDIO_FORMAT_PCM_32_BIT,
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AUDIO_FORMAT_PCM_8_24_BIT
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),
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::testing::Values(
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AUDIO_FORMAT_PCM_8_BIT,
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AUDIO_FORMAT_PCM_16_BIT,
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AUDIO_FORMAT_PCM_FLOAT,
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AUDIO_FORMAT_PCM_24_BIT_PACKED,
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AUDIO_FORMAT_PCM_32_BIT,
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AUDIO_FORMAT_PCM_8_24_BIT
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)));
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