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// Copyright 2014 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 "ppapi/shared_impl/media_stream_buffer_manager.h"
#include "base/logging.h"
#include "ppapi/c/pp_errors.h"
#include "ppapi/shared_impl/media_stream_buffer.h"
namespace ppapi {
MediaStreamBufferManager::Delegate::~Delegate() {}
void MediaStreamBufferManager::Delegate::OnNewBufferEnqueued() {}
MediaStreamBufferManager::MediaStreamBufferManager(Delegate* delegate)
: delegate_(delegate), buffer_size_(0), number_of_buffers_(0) {
DCHECK(delegate_);
}
MediaStreamBufferManager::~MediaStreamBufferManager() {}
bool MediaStreamBufferManager::SetBuffers(int32_t number_of_buffers,
int32_t buffer_size,
scoped_ptr<base::SharedMemory> shm,
bool enqueue_all_buffers) {
DCHECK(shm);
DCHECK_GT(number_of_buffers, 0);
DCHECK_GT(buffer_size,
static_cast<int32_t>(sizeof(MediaStreamBuffer::Header)));
DCHECK_EQ(buffer_size & 0x3, 0);
number_of_buffers_ = number_of_buffers;
buffer_size_ = buffer_size;
size_t size = number_of_buffers_ * buffer_size;
shm_ = shm.Pass();
if (!shm_->Map(size))
return false;
buffer_queue_.clear();
buffers_.clear();
uint8_t* p = reinterpret_cast<uint8_t*>(shm_->memory());
for (int32_t i = 0; i < number_of_buffers; ++i) {
if (enqueue_all_buffers)
buffer_queue_.push_back(i);
buffers_.push_back(reinterpret_cast<MediaStreamBuffer*>(p));
p += buffer_size_;
}
return true;
}
int32_t MediaStreamBufferManager::DequeueBuffer() {
if (buffer_queue_.empty())
return PP_ERROR_FAILED;
int32_t buffer = buffer_queue_.front();
buffer_queue_.pop_front();
return buffer;
}
void MediaStreamBufferManager::EnqueueBuffer(int32_t index) {
CHECK_GE(index, 0) << "Invalid buffer index";
CHECK_LT(index, number_of_buffers_) << "Invalid buffer index";
buffer_queue_.push_back(index);
delegate_->OnNewBufferEnqueued();
}
MediaStreamBuffer* MediaStreamBufferManager::GetBufferPointer(
int32_t index) {
CHECK_GE(index, 0) << "Invalid buffer index";
CHECK_LT(index, number_of_buffers_) << "Invalid buffer index";
return buffers_[index];
}
} // namespace ppapi
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