1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "ppapi/shared_impl/media_stream_frame_buffer.h"
7 #include "base/logging.h"
8 #include "ppapi/c/pp_errors.h"
12 MediaStreamFrameBuffer::Delegate::~Delegate() {}
14 void MediaStreamFrameBuffer::Delegate::OnNewFrameEnqueued() {
17 MediaStreamFrameBuffer::MediaStreamFrameBuffer(Delegate* delegate)
18 : delegate_(delegate),
20 number_of_frames_(0) {
24 MediaStreamFrameBuffer::~MediaStreamFrameBuffer() {
27 bool MediaStreamFrameBuffer::SetFrames(
28 int32_t number_of_frames,
30 scoped_ptr<base::SharedMemory> shm,
31 bool enqueue_all_frames) {
34 DCHECK_GT(number_of_frames, 0);
35 DCHECK_GT(frame_size, static_cast<int32_t>(sizeof(MediaStreamFrame::Header)));
36 DCHECK_EQ(frame_size & 0x3, 0);
38 number_of_frames_ = number_of_frames;
39 frame_size_ = frame_size;
41 int32_t size = number_of_frames_ * frame_size;
46 uint8_t* p = reinterpret_cast<uint8_t*>(shm_->memory());
47 for (int32_t i = 0; i < number_of_frames; ++i) {
48 if (enqueue_all_frames)
49 frame_queue_.push_back(i);
50 frames_.push_back(reinterpret_cast<MediaStreamFrame*>(p));
56 int32_t MediaStreamFrameBuffer::DequeueFrame() {
57 if (frame_queue_.empty())
58 return PP_ERROR_FAILED;
59 int32_t frame = frame_queue_.front();
60 frame_queue_.pop_front();
64 void MediaStreamFrameBuffer::EnqueueFrame(int32_t index) {
66 DCHECK_LT(index, number_of_frames_);
67 frame_queue_.push_back(index);
68 delegate_->OnNewFrameEnqueued();
71 MediaStreamFrame* MediaStreamFrameBuffer::GetFramePointer(
74 DCHECK_LT(index, number_of_frames_);
75 return frames_[index];