blob: 12f87ba13077d2be2feb1f706c578da7c82cb0e9 [file] [log] [blame]
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/base/android/media_codec_bridge_impl.h"
#include <algorithm>
#include <limits>
#include <memory>
#include <utility>
#include "base/android/build_info.h"
#include "base/android/jni_android.h"
#include "base/android/jni_array.h"
#include "base/android/jni_string.h"
#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "base/numerics/safe_conversions.h"
#include "base/strings/string_util.h"
#include "media/base/android/jni_hdr_metadata.h"
#include "media/base/android/media_codec_util.h"
#include "media/base/android/media_jni_headers/MediaCodecBridgeBuilder_jni.h"
#include "media/base/android/media_jni_headers/MediaCodecBridge_jni.h"
#include "media/base/audio_codecs.h"
#include "media/base/bit_reader.h"
#include "media/base/subsample_entry.h"
#include "media/base/video_codecs.h"
using base::android::AttachCurrentThread;
using base::android::ConvertJavaStringToUTF8;
using base::android::ConvertUTF8ToJavaString;
using base::android::JavaIntArrayToIntVector;
using base::android::JavaRef;
using base::android::ScopedJavaGlobalRef;
using base::android::ScopedJavaLocalRef;
using base::android::ToJavaByteArray;
#define RETURN_ON_ERROR(condition) \
do { \
if (!(condition)) { \
LOG(ERROR) << "Unable to parse AAC header: " #condition; \
return false; \
} \
} while (0)
namespace media {
namespace {
enum {
kBufferFlagSyncFrame = 1, // BUFFER_FLAG_SYNC_FRAME
kBufferFlagEndOfStream = 4, // BUFFER_FLAG_END_OF_STREAM
kConfigureFlagEncode = 1, // CONFIGURE_FLAG_ENCODE
};
using CodecSpecificData = std::vector<uint8_t>;
// Parses |extra_data| to get info to be added to a Java MediaFormat.
bool GetCodecSpecificDataForAudio(AudioCodec codec,
const uint8_t* extra_data,
size_t extra_data_size,
int64_t codec_delay_ns,
int64_t seek_preroll_ns,
CodecSpecificData* output_csd0,
CodecSpecificData* output_csd1,
CodecSpecificData* output_csd2,
bool* output_frame_has_adts_header) {
*output_frame_has_adts_header = false;
if (extra_data_size == 0 && codec != kCodecOpus)
return true;
switch (codec) {
case kCodecVorbis: {
if (extra_data[0] != 2) {
LOG(ERROR) << "Invalid number of vorbis headers before the codec "
<< "header: " << extra_data[0];
return false;
}
size_t header_length[2];
// |total_length| keeps track of the total number of bytes before the last
// header.
size_t total_length = 1;
const uint8_t* current_pos = extra_data;
// Calculate the length of the first 2 headers.
for (int i = 0; i < 2; ++i) {
header_length[i] = 0;
while (total_length < extra_data_size) {
size_t size = *(++current_pos);
total_length += 1 + size;
if (total_length > 0x80000000) {
LOG(ERROR) << "Vorbis header size too large";
return false;
}
header_length[i] += size;
if (size < 0xFF)
break;
}
if (total_length >= extra_data_size) {
LOG(ERROR) << "Invalid vorbis header size in the extra data";
return false;
}
}
current_pos++;
// The first header is the identification header.
output_csd0->assign(current_pos, current_pos + header_length[0]);
// The last header is the codec header.
output_csd1->assign(extra_data + total_length,
extra_data + extra_data_size);
break;
}
case kCodecAAC: {
media::BitReader reader(extra_data, extra_data_size);
// The following code is copied from aac.cc
// TODO(qinmin): refactor the code in aac.cc to make it more reusable.
uint8_t profile = 0;
uint8_t frequency_index = 0;
uint8_t channel_config = 0;
RETURN_ON_ERROR(reader.ReadBits(5, &profile));
RETURN_ON_ERROR(reader.ReadBits(4, &frequency_index));
if (0xf == frequency_index)
RETURN_ON_ERROR(reader.SkipBits(24));
RETURN_ON_ERROR(reader.ReadBits(4, &channel_config));
if (profile == 5 || profile == 29) {
// Read extension config.
uint8_t ext_frequency_index = 0;
RETURN_ON_ERROR(reader.ReadBits(4, &ext_frequency_index));
if (ext_frequency_index == 0xf)
RETURN_ON_ERROR(reader.SkipBits(24));
RETURN_ON_ERROR(reader.ReadBits(5, &profile));
}
if (profile < 1 || profile > 4 || frequency_index == 0xf ||
channel_config > 7) {
LOG(ERROR) << "Invalid AAC header";
return false;
}
output_csd0->push_back(profile << 3 | frequency_index >> 1);
output_csd0->push_back((frequency_index & 0x01) << 7 | channel_config
<< 3);
*output_frame_has_adts_header = true;
break;
}
case kCodecOpus: {
if (!extra_data || extra_data_size == 0 || codec_delay_ns < 0 ||
seek_preroll_ns < 0) {
LOG(ERROR) << "Invalid Opus Header";
return false;
}
// csd0 - Opus Header
output_csd0->assign(extra_data, extra_data + extra_data_size);
// csd1 - Codec Delay
const uint8_t* codec_delay_ns_ptr =
reinterpret_cast<const uint8_t*>(&codec_delay_ns);
output_csd1->assign(codec_delay_ns_ptr,
codec_delay_ns_ptr + sizeof(int64_t));
// csd2 - Seek Preroll
const uint8_t* seek_preroll_ns_ptr =
reinterpret_cast<const uint8_t*>(&seek_preroll_ns);
output_csd2->assign(seek_preroll_ns_ptr,
seek_preroll_ns_ptr + sizeof(int64_t));
break;
}
default:
LOG(ERROR) << "Invalid header encountered for codec: "
<< GetCodecName(codec);
return false;
}
return true;
}
} // namespace
VideoCodecConfig::VideoCodecConfig() = default;
VideoCodecConfig::~VideoCodecConfig() = default;
// static
std::unique_ptr<MediaCodecBridge> MediaCodecBridgeImpl::CreateAudioDecoder(
const AudioDecoderConfig& config,
const JavaRef<jobject>& media_crypto,
base::RepeatingClosure on_buffers_available_cb) {
DVLOG(2) << __func__ << ": " << config.AsHumanReadableString()
<< " media_crypto:" << media_crypto.obj();
if (!MediaCodecUtil::IsMediaCodecAvailable())
return nullptr;
const std::string mime =
MediaCodecUtil::CodecToAndroidMimeType(config.codec());
if (mime.empty())
return nullptr;
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jstring> j_mime = ConvertUTF8ToJavaString(env, mime);
const int channel_count =
ChannelLayoutToChannelCount(config.channel_layout());
// It's important that the multiplication is first in this calculation to
// reduce the precision loss due to integer truncation.
const int64_t codec_delay_ns = base::Time::kNanosecondsPerSecond *
config.codec_delay() /
config.samples_per_second();
const int64_t seek_preroll_ns = config.seek_preroll().InMicroseconds() *
base::Time::kNanosecondsPerMicrosecond;
CodecSpecificData csd0, csd1, csd2;
bool output_frame_has_adts_header;
if (!GetCodecSpecificDataForAudio(config.codec(), config.extra_data().data(),
config.extra_data().size(), codec_delay_ns,
seek_preroll_ns, &csd0, &csd1, &csd2,
&output_frame_has_adts_header)) {
return nullptr;
}
ScopedJavaLocalRef<jbyteArray> j_csd0 = ToJavaByteArray(env, csd0);
ScopedJavaLocalRef<jbyteArray> j_csd1 = ToJavaByteArray(env, csd1);
ScopedJavaLocalRef<jbyteArray> j_csd2 = ToJavaByteArray(env, csd2);
ScopedJavaGlobalRef<jobject> j_bridge(
Java_MediaCodecBridgeBuilder_createAudioDecoder(
env, j_mime, media_crypto, config.samples_per_second(), channel_count,
j_csd0, j_csd1, j_csd2, output_frame_has_adts_header,
!!on_buffers_available_cb));
if (j_bridge.is_null())
return nullptr;
return base::WrapUnique(
new MediaCodecBridgeImpl(CodecType::kAny, std::move(j_bridge),
std::move(on_buffers_available_cb)));
}
// static
std::unique_ptr<MediaCodecBridge> MediaCodecBridgeImpl::CreateVideoDecoder(
const VideoCodecConfig& config) {
if (!MediaCodecUtil::IsMediaCodecAvailable())
return nullptr;
const std::string mime = MediaCodecUtil::CodecToAndroidMimeType(config.codec);
if (mime.empty())
return nullptr;
JNIEnv* env = AttachCurrentThread();
auto j_mime = ConvertUTF8ToJavaString(env, mime);
auto j_csd0 = ToJavaByteArray(env, config.csd0.data(), config.csd0.size());
auto j_csd1 = ToJavaByteArray(env, config.csd1.data(), config.csd1.size());
std::unique_ptr<JniHdrMetadata> jni_hdr_metadata;
if (config.hdr_metadata.has_value()) {
jni_hdr_metadata = std::make_unique<JniHdrMetadata>(
config.container_color_space, config.hdr_metadata.value());
}
auto j_hdr_metadata = jni_hdr_metadata ? jni_hdr_metadata->obj() : nullptr;
ScopedJavaGlobalRef<jobject> j_bridge(
Java_MediaCodecBridgeBuilder_createVideoDecoder(
env, j_mime, static_cast<int>(config.codec_type), config.media_crypto,
config.initial_expected_coded_size.width(),
config.initial_expected_coded_size.height(), config.surface, j_csd0,
j_csd1, j_hdr_metadata, true /* allow_adaptive_playback */,
!!config.on_buffers_available_cb));
if (j_bridge.is_null())
return nullptr;
return base::WrapUnique(new MediaCodecBridgeImpl(
config.codec_type, std::move(j_bridge), config.on_buffers_available_cb));
}
// static
std::unique_ptr<MediaCodecBridge> MediaCodecBridgeImpl::CreateVideoEncoder(
VideoCodec codec,
const gfx::Size& size,
int bit_rate,
int frame_rate,
int i_frame_interval,
int color_format) {
if (!MediaCodecUtil::IsMediaCodecAvailable())
return nullptr;
const std::string mime = MediaCodecUtil::CodecToAndroidMimeType(codec);
if (mime.empty())
return nullptr;
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jstring> j_mime = ConvertUTF8ToJavaString(env, mime);
ScopedJavaGlobalRef<jobject> j_bridge(
Java_MediaCodecBridgeBuilder_createVideoEncoder(
env, j_mime, size.width(), size.height(), bit_rate, frame_rate,
i_frame_interval, color_format));
if (j_bridge.is_null())
return nullptr;
return base::WrapUnique(
new MediaCodecBridgeImpl(CodecType::kAny, std::move(j_bridge)));
}
// static
void MediaCodecBridgeImpl::SetupCallbackHandlerForTesting() {
// Callback APIs are only available on M+, so do nothing if below that.
if (base::android::BuildInfo::GetInstance()->sdk_int() <
base::android::SDK_VERSION_MARSHMALLOW) {
return;
}
JNIEnv* env = AttachCurrentThread();
Java_MediaCodecBridge_createCallbackHandlerForTesting(env);
}
MediaCodecBridgeImpl::MediaCodecBridgeImpl(
CodecType codec_type,
ScopedJavaGlobalRef<jobject> j_bridge,
base::RepeatingClosure on_buffers_available_cb)
: codec_type_(codec_type),
on_buffers_available_cb_(std::move(on_buffers_available_cb)),
j_bridge_(std::move(j_bridge)) {
DCHECK(!j_bridge_.is_null());
if (!on_buffers_available_cb_)
return;
DCHECK_GE(base::android::BuildInfo::GetInstance()->sdk_int(),
base::android::SDK_VERSION_MARSHMALLOW);
// Note this should be done last since setBuffersAvailableListener() may
// immediately invoke the callback if buffers came in during construction.
Java_MediaCodecBridge_setBuffersAvailableListener(
AttachCurrentThread(), j_bridge_, reinterpret_cast<intptr_t>(this));
}
MediaCodecBridgeImpl::~MediaCodecBridgeImpl() {
JNIEnv* env = AttachCurrentThread();
if (j_bridge_.obj())
Java_MediaCodecBridge_release(env, j_bridge_);
}
void MediaCodecBridgeImpl::Stop() {
JNIEnv* env = AttachCurrentThread();
Java_MediaCodecBridge_stop(env, j_bridge_);
}
MediaCodecStatus MediaCodecBridgeImpl::Flush() {
JNIEnv* env = AttachCurrentThread();
return static_cast<MediaCodecStatus>(
Java_MediaCodecBridge_flush(env, j_bridge_));
}
MediaCodecStatus MediaCodecBridgeImpl::GetOutputSize(gfx::Size* size) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> result =
Java_MediaCodecBridge_getOutputFormat(env, j_bridge_);
MediaCodecStatus status = static_cast<MediaCodecStatus>(
Java_GetOutputFormatResult_status(env, result));
if (status == MEDIA_CODEC_OK) {
size->SetSize(Java_GetOutputFormatResult_width(env, result),
Java_GetOutputFormatResult_height(env, result));
}
return status;
}
MediaCodecStatus MediaCodecBridgeImpl::GetOutputSamplingRate(
int* sampling_rate) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> result =
Java_MediaCodecBridge_getOutputFormat(env, j_bridge_);
MediaCodecStatus status = static_cast<MediaCodecStatus>(
Java_GetOutputFormatResult_status(env, result));
if (status == MEDIA_CODEC_OK)
*sampling_rate = Java_GetOutputFormatResult_sampleRate(env, result);
return status;
}
MediaCodecStatus MediaCodecBridgeImpl::GetOutputChannelCount(
int* channel_count) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> result =
Java_MediaCodecBridge_getOutputFormat(env, j_bridge_);
MediaCodecStatus status = static_cast<MediaCodecStatus>(
Java_GetOutputFormatResult_status(env, result));
if (status == MEDIA_CODEC_OK)
*channel_count = Java_GetOutputFormatResult_channelCount(env, result);
return status;
}
MediaCodecStatus MediaCodecBridgeImpl::QueueInputBuffer(
int index,
const uint8_t* data,
size_t data_size,
base::TimeDelta presentation_time) {
DVLOG(3) << __func__ << " " << index << ": " << data_size;
if (data_size >
base::checked_cast<size_t>(std::numeric_limits<int32_t>::max())) {
return MEDIA_CODEC_ERROR;
}
if (data && !FillInputBuffer(index, data, data_size))
return MEDIA_CODEC_ERROR;
JNIEnv* env = AttachCurrentThread();
return static_cast<MediaCodecStatus>(Java_MediaCodecBridge_queueInputBuffer(
env, j_bridge_, index, 0, data_size, presentation_time.InMicroseconds(),
0));
}
MediaCodecStatus MediaCodecBridgeImpl::QueueSecureInputBuffer(
int index,
const uint8_t* data,
size_t data_size,
const std::string& key_id,
const std::string& iv,
const std::vector<SubsampleEntry>& subsamples,
const EncryptionScheme& encryption_scheme,
base::TimeDelta presentation_time) {
DVLOG(3) << __func__ << " " << index << ": " << data_size;
if (data_size >
base::checked_cast<size_t>(std::numeric_limits<int32_t>::max())) {
return MEDIA_CODEC_ERROR;
}
if (data && !FillInputBuffer(index, data, data_size))
return MEDIA_CODEC_ERROR;
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jbyteArray> j_key_id = ToJavaByteArray(
env, reinterpret_cast<const uint8_t*>(key_id.data()), key_id.size());
ScopedJavaLocalRef<jbyteArray> j_iv = ToJavaByteArray(
env, reinterpret_cast<const uint8_t*>(iv.data()), iv.size());
// The MediaCodec.CryptoInfo documentation says to pass NULL for |clear_array|
// to indicate that all data is encrypted. But it doesn't specify what
// |cypher_array| and |subsamples_size| should be in that case. We pass
// one subsample here just to be on the safe side.
int num_subsamples = std::max(static_cast<size_t>(1), subsamples.size());
std::unique_ptr<jint[]> native_clear_array(new jint[num_subsamples]);
std::unique_ptr<jint[]> native_cypher_array(new jint[num_subsamples]);
if (subsamples.empty()) {
native_clear_array[0] = 0;
native_cypher_array[0] = data_size;
} else {
for (size_t i = 0; i < subsamples.size(); ++i) {
DCHECK(subsamples[i].clear_bytes <= std::numeric_limits<uint16_t>::max());
if (subsamples[i].cypher_bytes >
static_cast<uint32_t>(std::numeric_limits<jint>::max())) {
return MEDIA_CODEC_ERROR;
}
native_clear_array[i] = subsamples[i].clear_bytes;
native_cypher_array[i] = subsamples[i].cypher_bytes;
}
}
ScopedJavaLocalRef<jintArray> clear_array = base::android::ToJavaIntArray(
env, native_clear_array.get(), num_subsamples);
ScopedJavaLocalRef<jintArray> cypher_array = base::android::ToJavaIntArray(
env, native_cypher_array.get(), num_subsamples);
return static_cast<MediaCodecStatus>(
Java_MediaCodecBridge_queueSecureInputBuffer(
env, j_bridge_, index, 0, j_iv, j_key_id, clear_array, cypher_array,
num_subsamples, static_cast<int>(encryption_scheme.mode()),
static_cast<int>(encryption_scheme.pattern().crypt_byte_block()),
static_cast<int>(encryption_scheme.pattern().skip_byte_block()),
presentation_time.InMicroseconds()));
}
void MediaCodecBridgeImpl::QueueEOS(int input_buffer_index) {
DVLOG(3) << __func__ << ": " << input_buffer_index;
JNIEnv* env = AttachCurrentThread();
Java_MediaCodecBridge_queueInputBuffer(env, j_bridge_, input_buffer_index, 0,
0, 0, kBufferFlagEndOfStream);
}
MediaCodecStatus MediaCodecBridgeImpl::DequeueInputBuffer(
base::TimeDelta timeout,
int* index) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> result = Java_MediaCodecBridge_dequeueInputBuffer(
env, j_bridge_, timeout.InMicroseconds());
*index = Java_DequeueInputResult_index(env, result);
MediaCodecStatus status = static_cast<MediaCodecStatus>(
Java_DequeueInputResult_status(env, result));
DVLOG(3) << __func__ << ": status: " << status << ", index: " << *index;
return status;
}
MediaCodecStatus MediaCodecBridgeImpl::DequeueOutputBuffer(
base::TimeDelta timeout,
int* index,
size_t* offset,
size_t* size,
base::TimeDelta* presentation_time,
bool* end_of_stream,
bool* key_frame) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> result =
Java_MediaCodecBridge_dequeueOutputBuffer(env, j_bridge_,
timeout.InMicroseconds());
*index = Java_DequeueOutputResult_index(env, result);
*offset =
base::checked_cast<size_t>(Java_DequeueOutputResult_offset(env, result));
*size = base::checked_cast<size_t>(
Java_DequeueOutputResult_numBytes(env, result));
if (presentation_time) {
*presentation_time = base::TimeDelta::FromMicroseconds(
Java_DequeueOutputResult_presentationTimeMicroseconds(env, result));
}
int flags = Java_DequeueOutputResult_flags(env, result);
if (end_of_stream)
*end_of_stream = flags & kBufferFlagEndOfStream;
if (key_frame)
*key_frame = flags & kBufferFlagSyncFrame;
MediaCodecStatus status = static_cast<MediaCodecStatus>(
Java_DequeueOutputResult_status(env, result));
DVLOG(3) << __func__ << ": status: " << status << ", index: " << *index
<< ", offset: " << *offset << ", size: " << *size
<< ", flags: " << flags;
return status;
}
void MediaCodecBridgeImpl::ReleaseOutputBuffer(int index, bool render) {
DVLOG(3) << __func__ << ": " << index;
JNIEnv* env = AttachCurrentThread();
Java_MediaCodecBridge_releaseOutputBuffer(env, j_bridge_, index, render);
}
MediaCodecStatus MediaCodecBridgeImpl::GetInputBuffer(int input_buffer_index,
uint8_t** data,
size_t* capacity) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> j_buffer(
Java_MediaCodecBridge_getInputBuffer(env, j_bridge_, input_buffer_index));
if (j_buffer.is_null())
return MEDIA_CODEC_ERROR;
*data = static_cast<uint8_t*>(env->GetDirectBufferAddress(j_buffer.obj()));
*capacity =
base::checked_cast<size_t>(env->GetDirectBufferCapacity(j_buffer.obj()));
return MEDIA_CODEC_OK;
}
MediaCodecStatus MediaCodecBridgeImpl::CopyFromOutputBuffer(int index,
size_t offset,
void* dst,
size_t num) {
const uint8_t* src_data = nullptr;
size_t src_capacity = 0;
MediaCodecStatus status =
GetOutputBufferAddress(index, offset, &src_data, &src_capacity);
if (status == MEDIA_CODEC_OK) {
CHECK_GE(src_capacity, num);
memcpy(dst, src_data, num);
}
return status;
}
MediaCodecStatus MediaCodecBridgeImpl::GetOutputBufferAddress(
int index,
size_t offset,
const uint8_t** addr,
size_t* capacity) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> j_buffer(
Java_MediaCodecBridge_getOutputBuffer(env, j_bridge_, index));
if (j_buffer.is_null())
return MEDIA_CODEC_ERROR;
const size_t total_capacity = env->GetDirectBufferCapacity(j_buffer.obj());
CHECK_GE(total_capacity, offset);
*addr = reinterpret_cast<const uint8_t*>(
env->GetDirectBufferAddress(j_buffer.obj())) +
offset;
*capacity = total_capacity - offset;
return MEDIA_CODEC_OK;
}
void MediaCodecBridgeImpl::OnBuffersAvailable(
JNIEnv* /* env */,
const base::android::JavaParamRef<jobject>& /* obj */) {
on_buffers_available_cb_.Run();
}
std::string MediaCodecBridgeImpl::GetName() {
if (base::android::BuildInfo::GetInstance()->sdk_int() <
base::android::SDK_VERSION_JELLY_BEAN_MR2)
return "";
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jstring> j_name =
Java_MediaCodecBridge_getName(env, j_bridge_);
return ConvertJavaStringToUTF8(env, j_name);
}
bool MediaCodecBridgeImpl::SetSurface(const JavaRef<jobject>& surface) {
DCHECK_GE(base::android::BuildInfo::GetInstance()->sdk_int(),
base::android::SDK_VERSION_MARSHMALLOW);
JNIEnv* env = AttachCurrentThread();
return Java_MediaCodecBridge_setSurface(env, j_bridge_, surface);
}
void MediaCodecBridgeImpl::SetVideoBitrate(int bps, int frame_rate) {
JNIEnv* env = AttachCurrentThread();
Java_MediaCodecBridge_setVideoBitrate(env, j_bridge_, bps, frame_rate);
}
void MediaCodecBridgeImpl::RequestKeyFrameSoon() {
JNIEnv* env = AttachCurrentThread();
Java_MediaCodecBridge_requestKeyFrameSoon(env, j_bridge_);
}
CodecType MediaCodecBridgeImpl::GetCodecType() const {
return codec_type_;
}
bool MediaCodecBridgeImpl::FillInputBuffer(int index,
const uint8_t* data,
size_t size) {
uint8_t* dst = nullptr;
size_t capacity = 0;
if (GetInputBuffer(index, &dst, &capacity) != MEDIA_CODEC_OK) {
LOG(ERROR) << "GetInputBuffer failed";
return false;
}
CHECK(dst);
if (size > capacity) {
LOG(ERROR) << "Input buffer size " << size
<< " exceeds MediaCodec input buffer capacity: " << capacity;
return false;
}
memcpy(dst, data, size);
return true;
}
} // namespace media