blob: 77a5d7bc05bca5268385ac603bf7870b5c098ebe [file] [log] [blame]
/*
* Copyright 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//#define LOG_NDEBUG 0
#define LOG_TAG "audio_utils_format_tests"
#include <log/log.h>
#include <audio_utils/format.h>
#include <gtest/gtest.h>
/** returns true if the format is a common source or destination format.
memcpy_by_audio_format() allows interchange between any PCM format and the
"common" PCM 16 bit and PCM float formats. */
static bool is_common_src_format(audio_format_t format) {
return format == AUDIO_FORMAT_PCM_16_BIT || format == AUDIO_FORMAT_PCM_FLOAT;
}
static bool is_common_dst_format(audio_format_t format) {
return format == AUDIO_FORMAT_PCM_8_BIT // Allowed for HAL to AudioRecord conversion.
|| format == AUDIO_FORMAT_PCM_16_BIT
|| format == AUDIO_FORMAT_PCM_FLOAT;
}
// Initialize PCM 16 bit ramp for basic data validation (generated from PCM 8 bit data).
// TODO: consider creating fillPseudoRandomValue().
template<size_t size>
static void fillRamp(int16_t(&buffer)[size])
{
// Create PCM 16 bit data based on PCM 8 bit format because PCM 8 bit is convertible
// to all other audio formats without loss; hence, round trip conversion preserves equality.
uint8_t bytes[size];
for (size_t i = 0; i < size; ++i) {
bytes[i] = i;
}
// convert to PCM 16 bit
memcpy_by_audio_format(
buffer, AUDIO_FORMAT_PCM_16_BIT,
bytes, AUDIO_FORMAT_PCM_8_BIT, size);
uint8_t check[size];
memcpy_by_audio_format(
check, AUDIO_FORMAT_PCM_8_BIT,
buffer, AUDIO_FORMAT_PCM_16_BIT, size);
EXPECT_EQ(0, memcmp(check, bytes, size));
}
class FormatTest : public testing::TestWithParam<std::tuple<audio_format_t, audio_format_t>>
{
};
TEST_P(FormatTest, memcpy_by_audio_format)
{
// fetch parameters
const auto param = GetParam();
const audio_format_t src_encoding = std::get<0>(param);
const audio_format_t dst_encoding = std::get<1>(param);
// either source or destination (or both) need to be a common format
if (!is_common_src_format(src_encoding) && !is_common_dst_format(dst_encoding)) {
printf("skip conversion src:%#x dst:%#x\n", src_encoding, dst_encoding);
return;
}
constexpr size_t SAMPLES = UINT8_MAX;
constexpr audio_format_t orig_encoding = AUDIO_FORMAT_PCM_16_BIT;
int16_t orig_data[SAMPLES];
fillRamp(orig_data);
// data buffer for in-place conversion (uint32_t is maximum sample size of 4 bytes)
uint32_t data[SAMPLES];
// check buffer is used to compare out-of-place vs in-place conversion.
uint32_t check[SAMPLES];
printf("trying conversion src:%#x dst:%#x\n", src_encoding, dst_encoding);
fflush(stdout);
// Copy original data to data buffer at src_encoding.
memcpy_by_audio_format(
data, src_encoding,
orig_data, orig_encoding, SAMPLES);
// Convert from src encoding to dst encoding.
memcpy_by_audio_format(
check, dst_encoding,
data, src_encoding, SAMPLES);
// Check in-place is same as out-of-place conversion.
memcpy_by_audio_format(
data, dst_encoding,
data, src_encoding, SAMPLES);
EXPECT_EQ(0, memcmp(check, data, SAMPLES * audio_bytes_per_sample(dst_encoding)));
// Go back to the original data encoding for comparison.
memcpy_by_audio_format(
data, orig_encoding,
data, dst_encoding, SAMPLES);
// Raw byte compare at the original encoding must succeed - our conversions
// must be lossless for PCM 8 bit representation which orig_data was constructed from.
EXPECT_EQ(0,
memcmp(data, orig_data, SAMPLES * audio_bytes_per_sample(orig_encoding)));
}
INSTANTIATE_TEST_CASE_P(FormatVariations, FormatTest, ::testing::Combine(
::testing::Values(
AUDIO_FORMAT_PCM_8_BIT,
AUDIO_FORMAT_PCM_16_BIT,
AUDIO_FORMAT_PCM_FLOAT,
AUDIO_FORMAT_PCM_24_BIT_PACKED,
AUDIO_FORMAT_PCM_32_BIT,
AUDIO_FORMAT_PCM_8_24_BIT
),
::testing::Values(
AUDIO_FORMAT_PCM_8_BIT,
AUDIO_FORMAT_PCM_16_BIT,
AUDIO_FORMAT_PCM_FLOAT,
AUDIO_FORMAT_PCM_24_BIT_PACKED,
AUDIO_FORMAT_PCM_32_BIT,
AUDIO_FORMAT_PCM_8_24_BIT
)));
class FormatTest1p : public testing::TestWithParam<audio_format_t>
{
};
TEST_P(FormatTest1p, accumulate_by_audio_format)
{
const audio_format_t src_encoding = GetParam();
constexpr size_t SAMPLES = UINT8_MAX;
constexpr audio_format_t orig_encoding = AUDIO_FORMAT_PCM_16_BIT;
int16_t orig_data[SAMPLES];
fillRamp(orig_data);
// Copy original data to data buffer at src_encoding.
uint32_t src[SAMPLES];
memcpy_by_audio_format(
src, src_encoding,
orig_data, orig_encoding, SAMPLES);
// Just do a basic test that accumulating on a silent buffer keeps original values.
// Accumulation primitives are already tested by primitives_tests.
printf("trying accumulation for format: %#x\n", src_encoding);
fflush(stdout);
uint32_t acc[SAMPLES];
if (src_encoding == AUDIO_FORMAT_PCM_8_BIT) {
memset(acc, 0x80, SAMPLES * sizeof(uint32_t));
} else {
memset(acc, 0, SAMPLES * sizeof(uint32_t));
}
accumulate_by_audio_format(acc, src, src_encoding, SAMPLES);
EXPECT_EQ(0, memcmp(src, acc, SAMPLES * audio_bytes_per_sample(src_encoding)));
}
INSTANTIATE_TEST_CASE_P(FormatVariation, FormatTest1p, ::testing::Values(
AUDIO_FORMAT_PCM_8_BIT,
AUDIO_FORMAT_PCM_16_BIT,
AUDIO_FORMAT_PCM_FLOAT,
AUDIO_FORMAT_PCM_24_BIT_PACKED,
AUDIO_FORMAT_PCM_32_BIT,
AUDIO_FORMAT_PCM_8_24_BIT
));