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// Copyright (c) 2012 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/decoder_buffer.h"
namespace media {
// Allocates a block of memory which is padded for use with the SIMD
// optimizations used by FFmpeg.
static uint8_t* AllocateFFmpegSafeBlock(size_t size) {
uint8_t* const block = reinterpret_cast<uint8_t*>(base::AlignedAlloc(
size + DecoderBuffer::kPaddingSize, DecoderBuffer::kAlignmentSize));
memset(block + size, 0, DecoderBuffer::kPaddingSize);
return block;
}
DecoderBuffer::DecoderBuffer(size_t size)
: size_(size), side_data_size_(0), is_key_frame_(false) {
Initialize();
}
DecoderBuffer::DecoderBuffer(const uint8_t* data,
size_t size,
const uint8_t* side_data,
size_t side_data_size)
: size_(size), side_data_size_(side_data_size), is_key_frame_(false) {
if (!data) {
CHECK_EQ(size_, 0u);
CHECK(!side_data);
return;
}
Initialize();
memcpy(data_.get(), data, size_);
if (!side_data) {
CHECK_EQ(side_data_size, 0u);
return;
}
DCHECK_GT(side_data_size_, 0u);
memcpy(side_data_.get(), side_data, side_data_size_);
}
DecoderBuffer::~DecoderBuffer() {}
void DecoderBuffer::Initialize() {
data_.reset(AllocateFFmpegSafeBlock(size_));
if (side_data_size_ > 0)
side_data_.reset(AllocateFFmpegSafeBlock(side_data_size_));
}
// static
scoped_refptr<DecoderBuffer> DecoderBuffer::CopyFrom(const uint8_t* data,
size_t data_size) {
// If you hit this CHECK you likely have a bug in a demuxer. Go fix it.
CHECK(data);
return make_scoped_refptr(new DecoderBuffer(data, data_size, NULL, 0));
}
// static
scoped_refptr<DecoderBuffer> DecoderBuffer::CopyFrom(const uint8_t* data,
size_t data_size,
const uint8_t* side_data,
size_t side_data_size) {
// If you hit this CHECK you likely have a bug in a demuxer. Go fix it.
CHECK(data);
CHECK(side_data);
return make_scoped_refptr(new DecoderBuffer(data, data_size,
side_data, side_data_size));
}
// static
scoped_refptr<DecoderBuffer> DecoderBuffer::CreateEOSBuffer() {
return make_scoped_refptr(new DecoderBuffer(NULL, 0, NULL, 0));
}
bool DecoderBuffer::MatchesForTesting(const DecoderBuffer& buffer) const {
if (end_of_stream() != buffer.end_of_stream())
return false;
// It is illegal to call any member function if eos is true.
if (end_of_stream())
return true;
if (timestamp() != buffer.timestamp() || duration() != buffer.duration() ||
is_key_frame() != buffer.is_key_frame() ||
discard_padding() != buffer.discard_padding() ||
data_size() != buffer.data_size() ||
side_data_size() != buffer.side_data_size()) {
return false;
}
if (memcmp(data(), buffer.data(), data_size()) != 0 ||
memcmp(side_data(), buffer.side_data(), side_data_size()) != 0) {
return false;
}
if ((decrypt_config() == nullptr) != (buffer.decrypt_config() == nullptr))
return false;
return decrypt_config() ? decrypt_config()->Matches(*buffer.decrypt_config())
: true;
}
std::string DecoderBuffer::AsHumanReadableString() const {
if (end_of_stream()) {
return "end of stream";
}
std::ostringstream s;
s << "timestamp: " << timestamp_.InMicroseconds()
<< " duration: " << duration_.InMicroseconds()
<< " size: " << size_
<< " side_data_size: " << side_data_size_
<< " is_key_frame: " << is_key_frame_
<< " encrypted: " << (decrypt_config_ != NULL)
<< " discard_padding (ms): (" << discard_padding_.first.InMilliseconds()
<< ", " << discard_padding_.second.InMilliseconds() << ")";
if (decrypt_config_)
s << " decrypt:" << (*decrypt_config_);
return s.str();
}
void DecoderBuffer::set_timestamp(base::TimeDelta timestamp) {
DCHECK(!end_of_stream());
timestamp_ = timestamp;
}
void DecoderBuffer::CopySideDataFrom(const uint8_t* side_data,
size_t side_data_size) {
if (side_data_size > 0) {
side_data_size_ = side_data_size;
side_data_.reset(AllocateFFmpegSafeBlock(side_data_size_));
memcpy(side_data_.get(), side_data, side_data_size_);
} else {
side_data_.reset();
side_data_size_ = 0;
}
}
} // namespace media
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