[NOT FOR REVIEW] Convert channel counts to size_t.

webrtc/modules/audio_coding/main/acm2/audio_coding_module.cc

 /*
  *  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.
  */
 
@@ skipping 35 matching lines @@
 // 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) {
+                             size_t 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) {
+                             size_t 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 codec_number = acm2::ACMCodecDB::CodecNumber(codec);
 
   if (codec_number < 0) {
     WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, -1,
                  "Invalid codec setting");
@@ skipping 12 matching lines @@
       initial_playout_delay_ms(0),
       playout_channels(1),
       playout_frequency_hz(32000) {
 }
 
 AudioCoding* AudioCoding::Create(const Config& config) {
   return new AudioCodingImpl(config);
 }
 
 }  // namespace webrtc