Add alaw codec for .wav files.

media/ffmpeg/ffmpeg_common.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/ffmpeg/ffmpeg_common.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "media/base/decoder_buffer.h"
@@ skipping 66 matching lines @@
     case AV_CODEC_ID_PCM_S24BE:
       return kCodecPCM_S24BE;
     case AV_CODEC_ID_FLAC:
       return kCodecFLAC;
     case AV_CODEC_ID_AMR_NB:
       return kCodecAMR_NB;
     case AV_CODEC_ID_AMR_WB:
       return kCodecAMR_WB;
     case AV_CODEC_ID_GSM_MS:
       return kCodecGSM_MS;
+    case AV_CODEC_ID_PCM_ALAW:
+      return kCodecPCM_ALAW;
     case AV_CODEC_ID_PCM_MULAW:
       return kCodecPCM_MULAW;
     case AV_CODEC_ID_OPUS:
       return kCodecOpus;
     default:
       DVLOG(1) << "Unknown audio CodecID: " << codec_id;
   }
   return kUnknownAudioCodec;
 }
 
@@ skipping 25 matching lines @@
     case kCodecVorbis:
       return AV_CODEC_ID_VORBIS;
     case kCodecFLAC:
       return AV_CODEC_ID_FLAC;
     case kCodecAMR_NB:
       return AV_CODEC_ID_AMR_NB;
     case kCodecAMR_WB:
       return AV_CODEC_ID_AMR_WB;
     case kCodecGSM_MS:
       return AV_CODEC_ID_GSM_MS;
+    case kCodecPCM_ALAW:
+      return AV_CODEC_ID_PCM_ALAW;
     case kCodecPCM_MULAW:
       return AV_CODEC_ID_PCM_MULAW;
     case kCodecOpus:
       return AV_CODEC_ID_OPUS;
     default:
       DVLOG(1) << "Unknown AudioCodec: " << audio_codec;
   }
   return AV_CODEC_ID_NONE;
 }
 
@@ skipping 382 matching lines @@
       return PIX_FMT_YUV420P;
     case VideoFrame::YV12A:
       return PIX_FMT_YUVA420P;
     default:
       DVLOG(1) << "Unsupported VideoFrame::Format: " << video_format;
   }
   return PIX_FMT_NONE;
 }
 
 }  // namespace media