lavc/mediacodec: refactor ff_AMediaCodecList_getCodecByType

Allows to select a codec (encoder or decoder) only if it supports a
specific profile.

Adds ff_AMediaCodecProfile_getProfileFromAVCodecContext to convert an
AVCodecContext profile to a MediaCodec profile. It only supports H264
for now.

The codepath using MediaCodecList.findDecoderForFormat() (Android >= 5.0)
has been dropped as this method does not allow to select a decoder
compatible with a specific profile.

libavcodec/mediacodec_wrapper.h

@@ -52,7 +52,9 @@
  *
  */
 
-char *ff_AMediaCodecList_getCodecNameByType(const char *mime, void *log_ctx);
+int ff_AMediaCodecProfile_getProfileFromAVCodecContext(AVCodecContext *avctx);
+
+char *ff_AMediaCodecList_getCodecNameByType(const char *mime, int profile, int encoder, void *log_ctx);
 
 struct FFAMediaFormat;
 typedef struct FFAMediaFormat FFAMediaFormat;

libavcodec/mediacodecdec.c

@@ -308,10 +308,16 @@ int ff_mediacodec_dec_init(AVCodecContext *avctx, MediaCodecDecContext *s,
 {
     int ret = 0;
     int status;
+    int profile;
 
     s->first_buffer_at = av_gettime();
 
-    s->codec_name = ff_AMediaCodecList_getCodecNameByType(mime, avctx);
+    profile = ff_AMediaCodecProfile_getProfileFromAVCodecContext(avctx);
+    if (profile < 0) {
+        av_log(avctx, AV_LOG_WARNING, "Unsupported or unknown profile");
+    }
+
+    s->codec_name = ff_AMediaCodecList_getCodecNameByType(mime, profile, 0, avctx);
     if (!s->codec_name) {
         ret = AVERROR_EXTERNAL;
         goto fail;