audio_utils/format.c

/*
 * Copyright (C) 2014 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"

#include <cutils/log.h>
#include <audio_utils/primitives.h>
#include <audio_utils/format.h>

void memcpy_by_audio_format(void *dst, audio_format_t dst_format,
        void *src, audio_format_t src_format, size_t count) {
    if (dst_format == src_format
            && (dst_format == AUDIO_FORMAT_PCM_16_BIT
                    || dst_format == AUDIO_FORMAT_PCM_FLOAT
                    || dst_format == AUDIO_FORMAT_PCM_24_BIT_PACKED)) {
        memcpy(dst, src, count * audio_bytes_per_sample(dst_format));
        return;
    }
    switch (dst_format) {
    case AUDIO_FORMAT_PCM_16_BIT:
        switch (src_format) {
        case AUDIO_FORMAT_PCM_FLOAT:
            memcpy_to_i16_from_float((int16_t*)dst, (float*)src, count);
            return;
        case AUDIO_FORMAT_PCM_24_BIT_PACKED:
            memcpy_to_i16_from_p24((int16_t*)dst, (uint8_t*)src, count);
            return;
        default:
            break;
        }
        break;
    case AUDIO_FORMAT_PCM_FLOAT:
        switch (src_format) {
        case AUDIO_FORMAT_PCM_16_BIT:
            memcpy_to_float_from_i16((float*)dst, (int16_t*)src, count);
            return;
        case AUDIO_FORMAT_PCM_24_BIT_PACKED:
            memcpy_to_float_from_p24((float*)dst, (uint8_t*)src, count);
            return;
        default:
            break;
        }
        break;
    case AUDIO_FORMAT_PCM_24_BIT_PACKED:
        switch (src_format) {
        case AUDIO_FORMAT_PCM_16_BIT:
            memcpy_to_p24_from_i16((uint8_t*)dst, (int16_t*)src, count);
            return;
        case AUDIO_FORMAT_PCM_FLOAT:
            memcpy_to_p24_from_float((uint8_t*)dst, (float*)src, count);
            return;
        default:
            break;
        }
        break;
    default:
        break;
    }
    LOG_ALWAYS_FATAL("invalid src format %#x for dst format %#x",
            src_format, dst_format);
}