audio_coding: remove "main" directory

This is the last piece of the old directory layout of the modules.

Duplicated header files are left in audio_coding/main/include until
downstream code is updated to the new location. They have pragma
warnings added to them and identical header guards as the new headers to avoid breaking things.

BUG=webrtc:5095
TESTED=Passing compile-trybots with --clobber flag:
git cl try --clobber --bot=win_compile_rel --bot=linux_compile_rel --bot=android_compile_rel --bot=mac_compile_rel --bot=ios_rel --bot=linux_gn_rel --bot=win_x64_gn_rel --bot=mac_x64_gn_rel --bot=android_gn_rel -m tryserver.webrtc
NOTRY=True
NOPRESUBMIT=True

Review URL: https://codereview.webrtc.org/1481493004

Cr-Commit-Position: refs/heads/master@{#10803}

1 files changed, 0 insertions, 83 deletions

diff --git a/webrtc/modules/audio_coding/main/acm2/acm_codec_database.h b/webrtc/modules/audio_coding/main/acm2/acm_codec_database.h
deleted file mode 100644
index f9adda0988..0000000000
--- a/webrtc/modules/audio_coding/main/acm2/acm_codec_database.h
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- *  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.
- */
-
-#ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_ACM2_ACM_CODEC_DATABASE_H_
-#define WEBRTC_MODULES_AUDIO_CODING_MAIN_ACM2_ACM_CODEC_DATABASE_H_
-
-#include "webrtc/common_types.h"
-#include "webrtc/engine_configurations.h"
-#include "webrtc/modules/audio_coding/main/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 {
- public:
-  // 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
-
-#endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_ACM2_ACM_CODEC_DATABASE_H_