Introduce Dolby Vision video codec and Demuxer support

media/base/video_codecs.cc

 // Copyright 2015 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/base/video_codecs.h"
 
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
@@ skipping 14 matching lines @@
     case kCodecMPEG2:
       return "mpeg2video";
     case kCodecMPEG4:
       return "mpeg4";
     case kCodecTheora:
       return "theora";
     case kCodecVP8:
       return "vp8";
     case kCodecVP9:
       return "vp9";
+    case kCodecDolbyVision:

[wolenetz, 2017/01/25 23:42:41]

nit: these cases are already not in sequence with the enum, rather seem to be
ordered by container. tl;dr: move DV case (not enum) to just after HEVC?

[erickung1, 2017/02/03 18:18:31]

Done.

+      return "dolbyvision";
   }
   NOTREACHED();
   return "";
 }
 
 std::string GetProfileName(VideoCodecProfile profile) {
   switch (profile) {
     case VIDEO_CODEC_PROFILE_UNKNOWN:
       return "unknown";
     case H264PROFILE_BASELINE:
@@ skipping 27 matching lines @@
     case VP8PROFILE_ANY:
       return "vp8";
     case VP9PROFILE_PROFILE0:
       return "vp9 profile0";
     case VP9PROFILE_PROFILE1:
       return "vp9 profile1";
     case VP9PROFILE_PROFILE2:
       return "vp9 profile2";
     case VP9PROFILE_PROFILE3:
       return "vp9 profile3";
+    case DOLBYVISION_PROFILE0:
+      return "dolby vision profile 0";
+    case DOLBYVISION_PROFILE4:
+      return "dolby vision profile 4";
+    case DOLBYVISION_PROFILE5:
+      return "dolby vision profile 5";
+    case DOLBYVISION_PROFILE7:
+      return "dolby vision profile 7";
   }
   NOTREACHED();
   return "";
 }
 
 bool ParseNewStyleVp9CodecID(const std::string& codec_id,
                              VideoCodecProfile* profile,
                              uint8_t* level_idc) {
   std::vector<std::string> fields = base::SplitString(
       codec_id, ".", base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL);
@@ skipping 271 matching lines @@
       DVLOG(4) << __func__ << ": invalid constraint byte=" << elem[i];
       return false;
     }
     constraint_flags[i - 4] = constr_byte;
   }
 
   return true;
 }
 #endif
 
+#if BUILDFLAG(ENABLE_DOLBY_VISION_DEMUXING)
+// The specification for Dolby Vision codec id strings can be found in Dolby
+// Vision streams within the MPEG-DASH format.
+bool ParseDolbyVisionCodecId(const std::string& codec_id,
+                             VideoCodecProfile* profile,
+                             uint8_t* level_idc) {
+  if (!base::StartsWith(codec_id, "dvh1.", base::CompareCase::SENSITIVE) &&
+      !base::StartsWith(codec_id, "dvhe.", base::CompareCase::SENSITIVE) &&
+      !base::StartsWith(codec_id, "dva1.", base::CompareCase::SENSITIVE) &&
+      !base::StartsWith(codec_id, "dvav.", base::CompareCase::SENSITIVE)) {
+    return false;
+  }
+
+  const int kMaxDvCodecIdLength = 5     // FOURCC string
+                                  + 1   // delimiting period
+                                  + 2   // profile id as 2 digit string
+                                  + 1   // delimiting period
+                                  + 2;  // level id as 2 digit string.
+
+  if (codec_id.size() > kMaxDvCodecIdLength) {
+    DVLOG(4) << __func__ << ": Codec id is too long (" << codec_id << ")";
+    return false;
+  }
+
+  std::vector<std::string> elem = base::SplitString(
+      codec_id, ".", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
+  DCHECK(elem[0] == "dvh1" || elem[0] == "dvhe" || elem[0] == "dva1" ||
+         elem[0] == "dvav");
+
+  if (elem.size() != 3) {
+    DVLOG(4) << __func__ << ": invalid dolby vision codec id " << codec_id;
+    return false;
+  }
+
+  unsigned profile_id = 0;
+  if (!base::StringToUint(elem[1], &profile_id) || profile_id > 7) {
+    DVLOG(4) << __func__ << ": invalid profile_id=" << elem[1];
+    return false;
+  }
+
+  // Only profile 0, 4 ,5 and 7 are valid.

[wolenetz, 2017/01/25 23:42:41]

nit: s/profile/profiles/ and s/4 ,/4, /

[erickung1, 2017/02/03 18:18:31]

Done.

+  switch (profile_id) {
+    case 0:
+      *profile = DOLBYVISION_PROFILE0;
+      break;
+    case 4:
+      *profile = DOLBYVISION_PROFILE4;
+      break;
+    case 5:
+      *profile = DOLBYVISION_PROFILE5;
+      break;
+    case 7:
+      *profile = DOLBYVISION_PROFILE7;
+      break;
+    default:
+      DVLOG(4) << __func__ << ": depecrated profile_id=" << profile_id;

[wolenetz, 2017/01/25 23:42:41]

nit: s/deprecated/deprecated and not supported/ ?

[erickung1, 2017/02/03 18:18:31]

Done.

+      return false;
+  }
+
+  unsigned level_id = 0;
+  if (!base::StringToUint(elem[2], &level_id) || level_id > 9 || level_id < 1) {
+    DVLOG(4) << __func__ << ": invalid level_id=" << elem[2];
+    return false;
+  }
+
+  *level_idc = level_id;
+
+  return true;
+}
+#endif
+
 VideoCodec StringToVideoCodec(const std::string& codec_id) {
   std::vector<std::string> elem = base::SplitString(
       codec_id, ".", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
   if (elem.empty())
     return kUnknownVideoCodec;
   VideoCodecProfile profile = VIDEO_CODEC_PROFILE_UNKNOWN;
   uint8_t level = 0;
   if (codec_id == "vp8" || codec_id == "vp8.0")
     return kCodecVP8;
   if (ParseNewStyleVp9CodecID(codec_id, &profile, &level) ||
       ParseLegacyVp9CodecID(codec_id, &profile, &level)) {
     return kCodecVP9;
   }
   if (codec_id == "theora")
     return kCodecTheora;
   if (ParseAVCCodecId(codec_id, &profile, &level))
     return kCodecH264;
 #if BUILDFLAG(ENABLE_HEVC_DEMUXING)
   if (ParseHEVCCodecId(codec_id, &profile, &level))
     return kCodecHEVC;
 #endif
+#if BUILDFLAG(ENABLE_DOLBY_VISION_DEMUXING)
+  if (ParseDolbyVisionCodecId(codec_id, &profile, &level))
+    return kCodecDolbyVision;
+#endif
   return kUnknownVideoCodec;
 }
 
 }  // namespace media