mirror of
https://github.com/oxen-io/session-android.git
synced 2024-12-23 08:27:30 +00:00
103 lines
3.2 KiB
C++
103 lines
3.2 KiB
C++
/*
|
|
* Copyright (c) 2013 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.
|
|
*/
|
|
|
|
#include "webrtc/modules/audio_coding/neteq/decision_logic_fax.h"
|
|
|
|
#include <assert.h>
|
|
|
|
#include <algorithm>
|
|
|
|
#include "webrtc/modules/audio_coding/neteq/decoder_database.h"
|
|
#include "webrtc/modules/audio_coding/neteq/sync_buffer.h"
|
|
|
|
namespace webrtc {
|
|
|
|
Operations DecisionLogicFax::GetDecisionSpecialized(
|
|
const SyncBuffer& sync_buffer,
|
|
const Expand& expand,
|
|
int decoder_frame_length,
|
|
const RTPHeader* packet_header,
|
|
Modes prev_mode,
|
|
bool play_dtmf,
|
|
bool* reset_decoder) {
|
|
assert(playout_mode_ == kPlayoutFax || playout_mode_ == kPlayoutOff);
|
|
uint32_t target_timestamp = sync_buffer.end_timestamp();
|
|
uint32_t available_timestamp = 0;
|
|
int is_cng_packet = 0;
|
|
if (packet_header) {
|
|
available_timestamp = packet_header->timestamp;
|
|
is_cng_packet =
|
|
decoder_database_->IsComfortNoise(packet_header->payloadType);
|
|
}
|
|
if (is_cng_packet) {
|
|
if (static_cast<int32_t>((generated_noise_samples_ + target_timestamp)
|
|
- available_timestamp) >= 0) {
|
|
// Time to play this packet now.
|
|
return kRfc3389Cng;
|
|
} else {
|
|
// Wait before playing this packet.
|
|
return kRfc3389CngNoPacket;
|
|
}
|
|
}
|
|
if (!packet_header) {
|
|
// No packet. If in CNG mode, play as usual. Otherwise, use other method to
|
|
// generate data.
|
|
if (cng_state_ == kCngRfc3389On) {
|
|
// Continue playing comfort noise.
|
|
return kRfc3389CngNoPacket;
|
|
} else if (cng_state_ == kCngInternalOn) {
|
|
// Continue playing codec-internal comfort noise.
|
|
return kCodecInternalCng;
|
|
} else {
|
|
// Nothing to play. Generate some data to play out.
|
|
switch (playout_mode_) {
|
|
case kPlayoutOff:
|
|
return kAlternativePlc;
|
|
case kPlayoutFax:
|
|
return kAudioRepetition;
|
|
default:
|
|
assert(false);
|
|
return kUndefined;
|
|
}
|
|
}
|
|
} else if (target_timestamp == available_timestamp) {
|
|
return kNormal;
|
|
} else {
|
|
if (static_cast<int32_t>((generated_noise_samples_ + target_timestamp)
|
|
- available_timestamp) >= 0) {
|
|
return kNormal;
|
|
} else {
|
|
// If currently playing comfort noise, continue with that. Do not
|
|
// increase the timestamp counter since generated_noise_samples_ will
|
|
// be increased.
|
|
if (cng_state_ == kCngRfc3389On) {
|
|
return kRfc3389CngNoPacket;
|
|
} else if (cng_state_ == kCngInternalOn) {
|
|
return kCodecInternalCng;
|
|
} else {
|
|
// Otherwise, do packet-loss concealment and increase the
|
|
// timestamp while waiting for the time to play this packet.
|
|
switch (playout_mode_) {
|
|
case kPlayoutOff:
|
|
return kAlternativePlcIncreaseTimestamp;
|
|
case kPlayoutFax:
|
|
return kAudioRepetitionIncreaseTimestamp;
|
|
default:
|
|
assert(0);
|
|
return kUndefined;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
} // namespace webrtc
|