Move media::AudioCodec to its own source file

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/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/sha1.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "build/build_config.h"
+#include "media/base/audio_decoder_config.h"
 #include "media/base/decoder_buffer.h"
 #include "media/base/video_decoder_config.h"
 #include "media/base/video_util.h"
 #include "media/media_features.h"
 
 namespace media {
 
 // Why FF_INPUT_BUFFER_PADDING_SIZE? FFmpeg assumes all input buffers are
 // padded. Check here to ensure FFmpeg only receives data padded to its
 // specifications.
@@ skipping 79 matching lines @@
     case AV_CODEC_ID_OPUS:
       return kCodecOpus;
     case AV_CODEC_ID_ALAC:
       return kCodecALAC;
     default:
       DVLOG(1) << "Unknown audio CodecID: " << codec_id;
   }
   return kUnknownAudioCodec;
 }
 
-static AVCodecID AudioCodecToCodecID(AudioCodec audio_codec,
-                                     SampleFormat sample_format) {
+AVCodecID AudioCodecToCodecID(AudioCodec audio_codec,
+                              SampleFormat sample_format) {
   switch (audio_codec) {
     case kCodecAAC:
       return AV_CODEC_ID_AAC;
     case kCodecALAC:
       return AV_CODEC_ID_ALAC;
     case kCodecMP3:
       return AV_CODEC_ID_MP3;
     case kCodecPCM:
       switch (sample_format) {
         case kSampleFormatU8:
@@ skipping 634 matching lines @@
 }
 
 int32_t HashCodecName(const char* codec_name) {
   // Use the first 32-bits from the SHA1 hash as the identifier.
   int32_t hash;
   memcpy(&hash, base::SHA1HashString(codec_name).substr(0, 4).c_str(), 4);
   return hash;
 }
 
 }  // namespace media