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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
* This file generates databases with information about all supported audio
* codecs.
#include "webrtc/common_types.h"
#include "webrtc/engine_configurations.h"
#include "webrtc/modules/audio_coding/acm2/rent_a_codec.h"
#include "webrtc/modules/audio_coding/neteq/include/neteq.h"
namespace webrtc {
namespace acm2 {
// TODO(tlegrand): replace class ACMCodecDB with a namespace.
class ACMCodecDB {
// kMaxNumCodecs - Maximum number of codecs that can be activated in one
// build.
// kMaxNumPacketSize - Maximum number of allowed packet sizes for one codec.
// These might need to be increased if adding a new codec to the database
static const int kMaxNumCodecs = 50;
static const int kMaxNumPacketSize = 6;
// Codec specific settings
// num_packet_sizes - number of allowed packet sizes.
// packet_sizes_samples - list of the allowed packet sizes.
// basic_block_samples - assigned a value different from 0 if the codec
// requires to be fed with a specific number of samples
// that can be different from packet size.
// channel_support - number of channels supported to encode;
// 1 = mono, 2 = stereo, etc.
struct CodecSettings {
int num_packet_sizes;
int packet_sizes_samples[kMaxNumPacketSize];
int basic_block_samples;
int channel_support;
// Returns codec id from database, given the information received in the input
// [codec_inst].
// Input:
// [codec_inst] - Information about the codec for which we require the
// database id.
// Return:
// codec id if successful, otherwise < 0.
static int CodecNumber(const CodecInst& codec_inst);
static int CodecId(const CodecInst& codec_inst);
static int CodecId(const char* payload_name, int frequency, int channels);
static int ReceiverCodecNumber(const CodecInst& codec_inst);
// Databases with information about the supported codecs
// database_ - stored information about all codecs: payload type, name,
// sampling frequency, packet size in samples, default channel
// support, and default rate.
// codec_settings_ - stored codec settings: number of allowed packet sizes,
// a vector with the allowed packet sizes, basic block
// samples, and max number of channels that are supported.
// neteq_decoders_ - list of supported decoders in NetEQ.
static const CodecInst database_[kMaxNumCodecs];
static const CodecSettings codec_settings_[kMaxNumCodecs];
static const NetEqDecoder neteq_decoders_[kMaxNumCodecs];
} // namespace acm2
} // namespace webrtc