Fix mime type mappings when the unified media pipeline is enabled.

media/base/mime_util_internal.h

 // Copyright 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.
 
 #ifndef MEDIA_BASE_MIME_UTIL_INTERNAL_H_
 #define MEDIA_BASE_MIME_UTIL_INTERNAL_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/containers/hash_tables.h"
 #include "base/macros.h"
+#include "media/base/media_export.h"
 #include "media/base/mime_util.h"
 
 namespace media {
 namespace internal {
 
 // Internal utility class for handling mime types.  Should only be invoked by
 // tests and the functions within mime_util.cc -- NOT for direct use by others.
-class MimeUtil {
+class MEDIA_EXPORT MimeUtil {
  public:
   MimeUtil();
   ~MimeUtil();
 
   enum Codec {
     INVALID_CODEC,
     PCM,
     MP3,
     AC3,
     EAC3,
     MPEG2_AAC_LC,
     MPEG2_AAC_MAIN,
     MPEG2_AAC_SSR,
     MPEG4_AAC_LC,
     MPEG4_AAC_SBR_v1,
     MPEG4_AAC_SBR_PS_v2,
     VORBIS,
     OPUS,
     H264,
     HEVC_MAIN,
     VP8,
     VP9,
-    THEORA
+    THEORA,
+    LAST_CODEC = THEORA
+  };
+
+  // Platform configuration structure.  Controls which codecs are supported at
+  // runtime.  Also used by tests to simulate platform differences.
+  struct PlatformInfo {
+    bool has_platform_decoders = false;
+
+    bool has_platform_vp8_decoder = false;
+    bool supports_opus = false;
+    bool supports_vp9 = false;
+
+    bool is_unified_media_pipeline_enabled = false;
   };
 
   // See mime_util.h for more information on these methods.
   bool IsSupportedMediaMimeType(const std::string& mime_type) const;
   void ParseCodecString(const std::string& codecs,
                         std::vector<std::string>* codecs_out,
                         bool strip);
-  SupportsType IsSupportedMediaFormat(
-      const std::string& mime_type,
-      const std::vector<std::string>& codecs) const;
+  SupportsType IsSupportedMediaFormat(const std::string& mime_type,
+                                      const std::vector<std::string>& codecs,
+                                      bool is_encrypted) const;
 
   void RemoveProprietaryMediaTypesAndCodecs();
 
+  // Checks special platform specific codec restrictions. Returns true if
+  // |codec| is supported when contained in |mime_type_lower_case|.
+  // |is_encrypted| means the codec will be used with encrypted blocks.
+  // |platform_info| describes the availability of various platform features;
+  // see PlatformInfo for more details.
+  static bool IsCodecSupportedOnPlatform(
+      Codec codec,
+      const std::string& mime_type_lower_case,
+      bool is_encrypted,
+      const PlatformInfo& platform_info);
+
  private:
   typedef base::hash_set<int> CodecSet;
   typedef std::map<std::string, CodecSet> MediaFormatMappings;
   struct CodecEntry {
     CodecEntry() : codec(INVALID_CODEC), is_ambiguous(true) {}
     CodecEntry(Codec c, bool ambiguous) : codec(c), is_ambiguous(ambiguous) {}
     Codec codec;
     bool is_ambiguous;
   };
   typedef std::map<std::string, CodecEntry> StringToCodecMappings;
 
   // For faster lookup, keep hash sets.
   void InitializeMimeTypeMaps();
 
-  // Returns IsSupported if all codec IDs in |codecs| are unambiguous
-  // and are supported by the platform. MayBeSupported is returned if
-  // at least one codec ID in |codecs| is ambiguous but all the codecs
-  // are supported by the platform. IsNotSupported is returned if at
-  // least one codec ID  is not supported by the platform.
+  // Returns IsSupported if all codec IDs in |codecs| are unambiguous and are
+  // supported in |mime_type_lower_case|. MayBeSupported is returned if at least
+  // one codec ID in |codecs| is ambiguous but all the codecs are supported.
+  // IsNotSupported is returned if |mime_type_lower_case| is not supported or at
+  // least one is not supported in |mime_type_lower_case|. |is_encrypted| means
+  // the codec will be used with encrypted blocks.
   SupportsType AreSupportedCodecs(const CodecSet& supported_codecs,
-                                  const std::vector<std::string>& codecs) const;
+                                  const std::vector<std::string>& codecs,
+                                  const std::string& mime_type_lower_case,
+                                  bool is_encrypted) const;
 
   // Converts a codec ID into an Codec enum value and indicates
   // whether the conversion was ambiguous.
   // Returns true if this method was able to map |codec_id| to a specific
   // Codec enum value. |codec| and |is_ambiguous| are only valid if true
   // is returned. Otherwise their value is undefined after the call.
   // |is_ambiguous| is true if |codec_id| did not have enough information to
   // unambiguously determine the proper Codec enum value. If |is_ambiguous|
   // is true |codec| contains the best guess for the intended Codec enum value.
   bool StringToCodec(const std::string& codec_id,
                      Codec* codec,
                      bool* is_ambiguous) const;
 
-  // Returns true if |codec| is supported by the platform.
-  // Note: This method will return false if the platform supports proprietary
-  // codecs but |allow_proprietary_codecs_| is set to false.
-  bool IsCodecSupported(Codec codec) const;
+  // Returns true if |codec| is supported when contained in
+  // |mime_type_lower_case|. Note: This method will always return false for
+  // proprietary codecs if |allow_proprietary_codecs_| is set to false.
+  // |is_encrypted| means the codec will be used with encrypted blocks.
+  bool IsCodecSupported(Codec codec,
+                        const std::string& mime_type_lower_case,
+                        bool is_encrypted) const;
 
   // Returns true if |codec| refers to a proprietary codec.
   bool IsCodecProprietary(Codec codec) const;
 
   // Returns true and sets |*default_codec| if |mime_type| has a  default codec
   // associated with it. Returns false otherwise and the value of
   // |*default_codec| is undefined.
   bool GetDefaultCodecLowerCase(const std::string& mime_type_lower_case,
                                 Codec* default_codec) const;
 
   // Returns true if |mime_type_lower_case| has a default codec associated with
   // it and IsCodecSupported() returns true for that particular codec.
-  bool IsDefaultCodecSupportedLowerCase(
-      const std::string& mime_type_lower_case) const;
+  // |is_encrypted| means the codec will be used with encrypted blocks.
+  bool IsDefaultCodecSupportedLowerCase(const std::string& mime_type_lower_case,
+                                        bool is_encrypted) const;
 
 #if defined(OS_ANDROID)
-  // Checks special Android only codec restrictions.
-  bool IsCodecSupportedOnAndroid(Codec codec) const;
+  // Indicates the support of various codecs within the platform.
+  PlatformInfo platform_info_;
 #endif
 
   // A map of mime_types and hash map of the supported codecs for the mime_type.
   MediaFormatMappings media_format_map_;
 
   // Keeps track of whether proprietary codec support should be
   // advertised to callers.
   bool allow_proprietary_codecs_;
 
   // Lookup table for string compare based string -> Codec mappings.
   StringToCodecMappings string_to_codec_map_;
 
   DISALLOW_COPY_AND_ASSIGN(MimeUtil);
 };
 
 }  // namespace internal
 }  // namespace media
 
 #endif  // MEDIA_BASE_MIME_UTIL_INTERNAL_H_