Support for YUV 4:4:4 subsampling.

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/metrics/histogram.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 382 matching lines @@
   }
 
   VideoFrame::Format format = PixelFormatToVideoFormat(stream->codec->pix_fmt);
   if (codec == kCodecVP9) {
     // TODO(tomfinegan): libavcodec doesn't know about VP9.
     format = VideoFrame::YV12;
     coded_size = natural_size;
   }
 
   // Pad out |coded_size| for subsampled YUV formats.
-  coded_size.set_width((coded_size.width() + 1) / 2 * 2);
-  if (format != VideoFrame::YV16)
-    coded_size.set_height((coded_size.height() + 1) / 2 * 2);
+  if (format != VideoFrame::I444) {
+    coded_size.set_width((coded_size.width() + 1) / 2 * 2);
+    if (format != VideoFrame::YV16)
+      coded_size.set_height((coded_size.height() + 1) / 2 * 2);
+  }
 
   bool is_encrypted = false;
   AVDictionaryEntry* key = av_dict_get(stream->metadata, "enc_key_id", NULL, 0);
   if (key)
     is_encrypted = true;
 
   AVDictionaryEntry* webm_alpha =
       av_dict_get(stream->metadata, "alpha_mode", NULL, 0);
   if (webm_alpha && !strcmp(webm_alpha->value, "1")) {
     format = VideoFrame::YV12A;
@@ skipping 94 matching lines @@
       // FFmpeg channel_layout is 0 for .wav and .mp3.  Attempt to guess layout
       // based on the channel count.
       return GuessChannelLayout(channels);
   }
 }
 
 VideoFrame::Format PixelFormatToVideoFormat(PixelFormat pixel_format) {
   switch (pixel_format) {
     case PIX_FMT_YUV422P:
       return VideoFrame::YV16;
+    case PIX_FMT_YUV444P:
+      return VideoFrame::I444;
     case PIX_FMT_YUV420P:
       return VideoFrame::YV12;
     case PIX_FMT_YUVJ420P:
       return VideoFrame::YV12J;
     case PIX_FMT_YUVA420P:
       return VideoFrame::YV12A;
     default:
       DVLOG(1) << "Unsupported PixelFormat: " << pixel_format;
   }
   return VideoFrame::UNKNOWN;
 }
 
 PixelFormat VideoFormatToPixelFormat(VideoFrame::Format video_format) {
   switch (video_format) {
     case VideoFrame::YV16:
       return PIX_FMT_YUV422P;
     case VideoFrame::YV12:
       return PIX_FMT_YUV420P;
     case VideoFrame::YV12J:
       return PIX_FMT_YUVJ420P;
     case VideoFrame::YV12A:
       return PIX_FMT_YUVA420P;
+    case VideoFrame::I444:
+      return PIX_FMT_YUV422P;

[scherkus (not reviewing), 2014/05/22 23:45:11]

shouldn't this be PIX_FMT_YUV444P?

[sandersd (OOO until July 31), 2014/05/23 00:45:22]

Done.

     default:
       DVLOG(1) << "Unsupported VideoFrame::Format: " << video_format;
   }
   return PIX_FMT_NONE;
 }
 
 bool FFmpegUTCDateToTime(const char* date_utc,
                          base::Time* out) {
   DCHECK(date_utc);
   DCHECK(out);
@@ skipping 20 matching lines @@
       return false;
 
     *out = parsed_time;
     return true;
   }
 
   return false;
 }
 
 }  // namespace media