Roll FFMpeg for M26. Fix ffmpeg float audio decoding.

media/mp4/mp4_stream_parser.cc

Index: media/mp4/mp4_stream_parser.cc
diff --git a/media/mp4/mp4_stream_parser.cc b/media/mp4/mp4_stream_parser.cc
index 3546be91bb4ad9a0adf98e6e29191c63189df486..45f3c96d5385dd3eec4b27d59d6710551ee748c4 100644
--- a/media/mp4/mp4_stream_parser.cc
+++ b/media/mp4/mp4_stream_parser.cc
@@ -202,11 +202,23 @@ bool MP4StreamParser::ParseMoov(BoxReader* reader) {
         return false;
       }
 
+      SampleFormat sample_format;
+      if (entry.samplesize == 8) {
+        sample_format = kSampleFormatU8;
+      } else if (entry.samplesize == 16) {
+        sample_format = kSampleFormatS16;
+      } else if (entry.samplesize == 32) {
+        sample_format = kSampleFormatS32;
+      } else {
+        LOG(ERROR) << "Unsupported sample size.";
+        return false;
+      }
+
       bool is_encrypted = entry.sinf.info.track_encryption.is_encrypted;
       audio_config.Initialize(kCodecAAC, entry.samplesize,
                               aac.channel_layout(),
                               aac.GetOutputSamplesPerSecond(has_sbr_),
-                              NULL, 0, is_encrypted, false);
+                              NULL, 0, sample_format, is_encrypted, false);
       has_audio_ = true;
       audio_track_id_ = track->header.track_id;
     }