47 lines
1.8 KiB
C++
47 lines
1.8 KiB
C++
// Copyright 2016 Google LLC. All rights reserved.
|
|
//
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file or at
|
|
// https://developers.google.com/open-source/licenses/bsd
|
|
//
|
|
// Enhanced AC3 audio utility functions.
|
|
|
|
#ifndef PACKAGER_MEDIA_CODECS_EC3_AUDIO_UTIL_H_
|
|
#define PACKAGER_MEDIA_CODECS_EC3_AUDIO_UTIL_H_
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include <vector>
|
|
|
|
namespace shaka {
|
|
namespace media {
|
|
|
|
/// Parse data from EC3Specific box and calculate EC3 channel map value based on
|
|
/// ETSI TS 102 366 V1.3.1 Digital Audio Compression (AC-3, Enhanced AC-3)
|
|
/// Standard E.1.3.1.8.
|
|
bool CalculateEC3ChannelMap(const std::vector<uint8_t>& ec3_data,
|
|
uint32_t* channel_map);
|
|
|
|
/// Parse data from EC3Specific box and calculate number of channels.
|
|
/// @return The number of channels associated with the input ec3 data on
|
|
/// success; otherwise 0 is returned.
|
|
size_t GetEc3NumChannels(const std::vector<uint8_t>& ec3_data);
|
|
|
|
/// Parse data from EC3Specific box, calculate EC3 channel map and then
|
|
/// obtain channel configuration descriptor value with MPEG scheme based on
|
|
/// ETSI TS 102 366 V1.4.1 Digital Audio Compression (AC-3, Enhanced AC-3)
|
|
/// Standard, Table I.1.1.
|
|
bool CalculateEC3ChannelMPEGValue(const std::vector<uint8_t>& ec3_data,
|
|
uint32_t* ec3_channel_mpeg_value);
|
|
|
|
/// Parse data from EC3Specific box and obtain Dolby Digital Plus JOC
|
|
/// decoding complexity based on ETSI TS 103 420 v1.2.1 Backwards-compatible
|
|
/// object audio carriage using Enhanced AC-3 Standard chapter C.3.1.
|
|
bool GetEc3JocComplexity(const std::vector<uint8_t>& ec3_data,
|
|
uint32_t* ec3_joc_complexity);
|
|
|
|
} // namespace media
|
|
} // namespace shaka
|
|
|
|
#endif // PACKAGER_MEDIA_CODECS_EC3_AUDIO_UTIL_H_
|