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/*
* Copyright (C) 2019 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 "SoundPool::Sound"
#include <utils/Log.h>
#include "Sound.h"
#include <media/NdkMediaCodec.h>
#include <media/NdkMediaExtractor.h>
#include <media/NdkMediaFormat.h>
namespace android::soundpool {
constexpr uint32_t kMaxSampleRate = 192000;
constexpr size_t kDefaultHeapSize = 1024 * 1024; // 1MB (compatible with low mem devices)
Sound::Sound(int32_t soundID, int fd, int64_t offset, int64_t length)
: mSoundID(soundID)
, mFd(fcntl(fd, F_DUPFD_CLOEXEC, (int)0 /* arg */)) // dup(fd) + close on exec to prevent leaks.
, mOffset(offset)
, mLength(length)
{
ALOGV("%s(soundID=%d, fd=%d, offset=%lld, length=%lld)",
__func__, soundID, fd, (long long)offset, (long long)length);
ALOGW_IF(mFd == -1, "Unable to dup descriptor %d", fd);
}
Sound::~Sound()
{
ALOGV("%s(soundID=%d, fd=%d)", __func__, mSoundID, mFd.get());
}
static status_t decode(int fd, int64_t offset, int64_t length,
uint32_t *rate, int32_t *channelCount, audio_format_t *audioFormat,
audio_channel_mask_t *channelMask, const sp<MemoryHeapBase>& heap,
size_t *sizeInBytes) {
ALOGV("%s(fd=%d, offset=%lld, length=%lld, ...)",
__func__, fd, (long long)offset, (long long)length);
std::unique_ptr<AMediaExtractor, decltype(&AMediaExtractor_delete)> ex{
AMediaExtractor_new(), &AMediaExtractor_delete};
status_t err = AMediaExtractor_setDataSourceFd(ex.get(), fd, offset, length);
if (err != AMEDIA_OK) {
return err;
}
*audioFormat = AUDIO_FORMAT_PCM_16_BIT; // default format for audio codecs.
const size_t numTracks = AMediaExtractor_getTrackCount(ex.get());
for (size_t i = 0; i < numTracks; i++) {
std::unique_ptr<AMediaFormat, decltype(&AMediaFormat_delete)> format{
AMediaExtractor_getTrackFormat(ex.get(), i), &AMediaFormat_delete};
const char *mime;
if (!AMediaFormat_getString(format.get(), AMEDIAFORMAT_KEY_MIME, &mime)) {
return UNKNOWN_ERROR;
}
if (strncmp(mime, "audio/", 6) == 0) {
std::unique_ptr<AMediaCodec, decltype(&AMediaCodec_delete)> codec{
AMediaCodec_createDecoderByType(mime), &AMediaCodec_delete};
if (codec == nullptr
|| AMediaCodec_configure(codec.get(), format.get(),
nullptr /* window */, nullptr /* drm */, 0 /* flags */) != AMEDIA_OK
|| AMediaCodec_start(codec.get()) != AMEDIA_OK
|| AMediaExtractor_selectTrack(ex.get(), i) != AMEDIA_OK) {
return UNKNOWN_ERROR;
}
bool sawInputEOS = false;
bool sawOutputEOS = false;
auto writePos = static_cast<uint8_t*>(heap->getBase());
size_t available = heap->getSize();
size_t written = 0;
format.reset(AMediaCodec_getOutputFormat(codec.get())); // update format.
while (!sawOutputEOS) {
if (!sawInputEOS) {
ssize_t bufidx = AMediaCodec_dequeueInputBuffer(codec.get(), 5000);
ALOGV("%s: input buffer %zd", __func__, bufidx);
if (bufidx >= 0) {
size_t bufsize;
uint8_t * const buf = AMediaCodec_getInputBuffer(
codec.get(), bufidx, &bufsize);
if (buf == nullptr) {
ALOGE("%s: AMediaCodec_getInputBuffer returned nullptr, short decode",
__func__);
break;
}
ssize_t sampleSize = AMediaExtractor_readSampleData(ex.get(), buf, bufsize);
ALOGV("%s: read %zd", __func__, sampleSize);
if (sampleSize < 0) {
sampleSize = 0;
sawInputEOS = true;
ALOGV("%s: EOS", __func__);
}
const int64_t presentationTimeUs = AMediaExtractor_getSampleTime(ex.get());
const media_status_t mstatus = AMediaCodec_queueInputBuffer(
codec.get(), bufidx,
0 /* offset */, sampleSize, presentationTimeUs,
sawInputEOS ? AMEDIACODEC_BUFFER_FLAG_END_OF_STREAM : 0);
if (mstatus != AMEDIA_OK) {
// AMEDIA_ERROR_UNKNOWN == { -ERANGE -EINVAL -EACCES }
ALOGE("%s: AMediaCodec_queueInputBuffer returned status %d,"
"short decode",
__func__, (int)mstatus);
break;
}
(void)AMediaExtractor_advance(ex.get());
}
}
AMediaCodecBufferInfo info;
const ssize_t status = AMediaCodec_dequeueOutputBuffer(codec.get(), &info, 1);
ALOGV("%s: dequeueoutput returned: %zd", __func__, status);
if (status >= 0) {
if (info.flags & AMEDIACODEC_BUFFER_FLAG_END_OF_STREAM) {
ALOGV("%s: output EOS", __func__);
sawOutputEOS = true;
}
ALOGV("%s: got decoded buffer size %d", __func__, info.size);
const uint8_t * const buf = AMediaCodec_getOutputBuffer(
codec.get(), status, nullptr /* out_size */);
if (buf == nullptr) {
ALOGE("%s: AMediaCodec_getOutputBuffer returned nullptr, short decode",
__func__);
break;
}
const size_t dataSize = std::min(available, (size_t)std::max(info.size, 0));
memcpy(writePos, buf + info.offset, dataSize);
writePos += dataSize;
written += dataSize;
available -= dataSize;
const media_status_t mstatus = AMediaCodec_releaseOutputBuffer(
codec.get(), status, false /* render */);
if (mstatus != AMEDIA_OK) {
// AMEDIA_ERROR_UNKNOWN == { -ERANGE -EINVAL -EACCES }
ALOGE("%s: AMediaCodec_releaseOutputBuffer"
" returned status %d, short decode",
__func__, (int)mstatus);
break;
}
if (available == 0) {
// there might be more data, but there's no space for it
sawOutputEOS = true;
}
} else if (status == AMEDIACODEC_INFO_OUTPUT_BUFFERS_CHANGED) {
ALOGV("%s: output buffers changed", __func__);
} else if (status == AMEDIACODEC_INFO_OUTPUT_FORMAT_CHANGED) {
format.reset(AMediaCodec_getOutputFormat(codec.get())); // update format
ALOGV("%s: format changed to: %s",
__func__, AMediaFormat_toString(format.get()));
} else if (status == AMEDIACODEC_INFO_TRY_AGAIN_LATER) {
ALOGV("%s: no output buffer right now", __func__);
} else if (status <= AMEDIA_ERROR_BASE) {
ALOGE("%s: decode error: %zd", __func__, status);
break;
} else {
ALOGV("%s: unexpected info code: %zd", __func__, status);
}
}
(void)AMediaCodec_stop(codec.get());
if (!AMediaFormat_getInt32(
format.get(), AMEDIAFORMAT_KEY_SAMPLE_RATE, (int32_t*) rate) ||
!AMediaFormat_getInt32(
format.get(), AMEDIAFORMAT_KEY_CHANNEL_COUNT, channelCount)) {
return UNKNOWN_ERROR;
}
int32_t mediaFormatChannelMask;
if (AMediaFormat_getInt32(format.get(), AMEDIAFORMAT_KEY_CHANNEL_MASK,
&mediaFormatChannelMask)) {
*channelMask = audio_channel_mask_from_media_format_mask(mediaFormatChannelMask);
} else {
*channelMask = AUDIO_CHANNEL_NONE;
}
*sizeInBytes = written;
return OK;
}
}
return UNKNOWN_ERROR;
}
status_t Sound::doLoad()
{
ALOGV("%s()", __func__);
status_t status = NO_INIT;
if (mFd.get() != -1) {
mHeap = new MemoryHeapBase(kDefaultHeapSize);
ALOGV("%s: start decode", __func__);
uint32_t sampleRate;
int32_t channelCount;
audio_format_t format;
audio_channel_mask_t channelMask;
status = decode(mFd.get(), mOffset, mLength, &sampleRate, &channelCount, &format,
&channelMask, mHeap, &mSizeInBytes);
ALOGV("%s: close(%d)", __func__, mFd.get());
mFd.reset(); // close
if (status != NO_ERROR) {
ALOGE("%s: unable to load sound", __func__);
} else if (sampleRate > kMaxSampleRate) {
ALOGE("%s: sample rate (%u) out of range", __func__, sampleRate);
status = BAD_VALUE;
} else if (channelCount < 1 || channelCount > FCC_LIMIT) {
ALOGE("%s: sample channel count (%d) out of range", __func__, channelCount);
status = BAD_VALUE;
} else {
// Correctly loaded, proper parameters
ALOGV("%s: pointer = %p, sizeInBytes = %zu, sampleRate = %u, channelCount = %d",
__func__, mHeap->getBase(), mSizeInBytes, sampleRate, channelCount);
mData = new MemoryBase(mHeap, 0, mSizeInBytes);
mSampleRate = sampleRate;
mChannelCount = channelCount;
mFormat = format;
mChannelMask = channelMask;
mState = READY; // this should be last, as it is an atomic sync point
return NO_ERROR;
}
} else {
ALOGE("%s: uninitialized fd, dup failed", __func__);
}
// ERROR handling
mHeap.clear();
mState = DECODE_ERROR; // this should be last, as it is an atomic sync point
return status;
}
} // namespace android::soundpool
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