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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.
*/
#include "webrtc/modules/audio_coding/main/interface/audio_coding_module.h"
#include "webrtc/common_types.h"
#include "webrtc/modules/audio_coding/main/acm2/acm_codec_database.h"
#include "webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.h"
#include "webrtc/system_wrappers/interface/clock.h"
#include "webrtc/system_wrappers/interface/trace.h"
namespace webrtc {
// Create module
AudioCodingModule* AudioCodingModule::Create(int id) {
return Create(id, Clock::GetRealTimeClock());
}
AudioCodingModule* AudioCodingModule::Create(int id, Clock* clock) {
AudioCodingModule::Config config;
config.id = id;
config.clock = clock;
return new acm2::AudioCodingModuleImpl(config);
}
// Get number of supported codecs
int AudioCodingModule::NumberOfCodecs() {
return acm2::ACMCodecDB::kNumCodecs;
}
// Get supported codec parameters with id
int AudioCodingModule::Codec(int list_id, CodecInst* codec) {
// Get the codec settings for the codec with the given list ID
return acm2::ACMCodecDB::Codec(list_id, codec);
}
// Get supported codec parameters with name, frequency and number of channels.
int AudioCodingModule::Codec(const char* payload_name,
CodecInst* codec,
int sampling_freq_hz,
int channels) {
int codec_id;
// Get the id of the codec from the database.
codec_id = acm2::ACMCodecDB::CodecId(
payload_name, sampling_freq_hz, channels);
if (codec_id < 0) {
// We couldn't find a matching codec, set the parameters to unacceptable
// values and return.
codec->plname[0] = '\0';
codec->pltype = -1;
codec->pacsize = 0;
codec->rate = 0;
codec->plfreq = 0;
return -1;
}
// Get default codec settings.
acm2::ACMCodecDB::Codec(codec_id, codec);
// Keep the number of channels from the function call. For most codecs it
// will be the same value as in default codec settings, but not for all.
codec->channels = channels;
return 0;
}
// Get supported codec Index with name, frequency and number of channels.
int AudioCodingModule::Codec(const char* payload_name,
int sampling_freq_hz,
int channels) {
return acm2::ACMCodecDB::CodecId(payload_name, sampling_freq_hz, channels);
}
// Checks the validity of the parameters of the given codec
bool AudioCodingModule::IsCodecValid(const CodecInst& codec) {
int mirror_id;
int codec_number = acm2::ACMCodecDB::CodecNumber(codec, &mirror_id);
if (codec_number < 0) {
WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, -1,
"Invalid codec setting");
return false;
} else {
return true;
}
}
AudioCoding* AudioCoding::Create(const Config& config) {
return new AudioCodingImpl(config);
}
} // namespace webrtc
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