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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.
#ifndef PPAPI_SHARED_IMPL_MEDIA_STREAM_BUFFER_H_
#define PPAPI_SHARED_IMPL_MEDIA_STREAM_BUFFER_H_
#include <stdint.h>
#include "ppapi/c/ppb_audio_buffer.h"
#include "ppapi/c/ppb_video_frame.h"
namespace ppapi {
union MediaStreamBuffer {
enum Type {
TYPE_UNKNOWN = 0,
TYPE_AUDIO = 1,
TYPE_VIDEO = 2,
TYPE_BITSTREAM = 3
};
struct Header {
Type type;
uint32_t size;
};
struct Audio {
Header header;
PP_TimeDelta timestamp;
PP_AudioBuffer_SampleRate sample_rate;
uint32_t number_of_channels;
uint32_t number_of_samples;
uint32_t data_size;
// Uses 8 bytes to make sure the Audio struct has consistent size between
// NaCl code and renderer code.
uint8_t data[8];
};
struct Video {
Header header;
PP_TimeDelta timestamp;
PP_VideoFrame_Format format;
PP_Size size;
uint32_t data_size;
// Uses 8 bytes to make sure the Video struct has consistent size between
// NaCl code and renderer code.
uint8_t data[8];
};
struct Bitstream {
Header header;
uint32_t data_size;
// Uses 8 bytes to make sure the Bitstream struct has consistent size
// between NaCl code and renderer code.
uint8_t data[8];
};
// Because these structs are written and read in shared memory, we need
// the size and alighment to be consistent between NaCl and its host trusted
// platform.
PP_COMPILE_ASSERT_SIZE_IN_BYTES(Header, 8);
PP_COMPILE_ASSERT_SIZE_IN_BYTES(Audio, 40);
PP_COMPILE_ASSERT_SIZE_IN_BYTES(Video, 40);
PP_COMPILE_ASSERT_SIZE_IN_BYTES(Bitstream, 20);
Header header;
Video video;
Audio audio;
Bitstream bitstream;
};
} // namespace ppapi
#endif // PPAPI_SHARED_IMPL_MEDIA_STREAM_BUFFER_H_
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