MediaCodec: add getInputFormat() method

Additional input-port format item:

int32: "adaptive-playback"
  video decoders only
  whether codec is configured for adaptive playback.  In this case, if
  codec has max-width/height limits, those limits are also exposed
  (int32: "max-width", "max-height")

Also, getInput/OutputFormat() is now callable in CONFIGURED and
STARTING states, although output format may be missing CSD fields
until INFO_OUTPUT_FORMAT_CHANGED message.

Includes missing OMX support for MP3 software decoder.

Bug: 11785204
Change-Id: I90c7e34ba81c7b81c43641599f3f496e838958c6

1 files changed, 17 insertions, 0 deletions

diff --git a/media/libstagefright/codecs/mp3dec/SoftMP3.cpp b/media/libstagefright/codecs/mp3dec/SoftMP3.cpp
index a09ab7c..5396022 100644
--- a/media/libstagefright/codecs/mp3dec/SoftMP3.cpp
+++ b/media/libstagefright/codecs/mp3dec/SoftMP3.cpp
@@ -146,6 +146,23 @@ OMX_ERRORTYPE SoftMP3::internalGetParameter(
             return OMX_ErrorNone;
         }
 
+        case OMX_IndexParamAudioMp3:
+        {
+            OMX_AUDIO_PARAM_MP3TYPE *mp3Params =
+                (OMX_AUDIO_PARAM_MP3TYPE *)params;
+
+            if (mp3Params->nPortIndex > 1) {
+                return OMX_ErrorUndefined;
+            }
+
+            mp3Params->nChannels = mNumChannels;
+            mp3Params->nBitRate = 0 /* unknown */;
+            mp3Params->nSampleRate = mSamplingRate;
+            // other fields are encoder-only
+
+            return OMX_ErrorNone;
+        }
+
         default:
             return SimpleSoftOMXComponent::internalGetParameter(index, params);
     }