From 93f4d1646e9441b89e19073d6ad8e187bd705640 Mon Sep 17 00:00:00 2001
From: Matthieu Bouron <matthieu.bouron@stupeflix.com>
Date: Tue, 31 May 2016 11:00:12 +0200
Subject: lavc/mediacodec: bypass width/height restrictions when looking for a
 decoder

Codec width/height restrictions seem hardcoded at the OMX level and
seem arbitrary. Bypassing those restrictions allows a device to decode
streams at higher resolutions.

For example it allows a Nexus 5 to decode h264 streams with a resolution
higher than 1920x1080.
---
 libavcodec/mediacodec_wrapper.c | 37 ++++++++++++++++++++++++++++---------
 libavcodec/mediacodec_wrapper.h |  2 +-
 libavcodec/mediacodecdec.c      |  2 +-
 3 files changed, 30 insertions(+), 11 deletions(-)

diff --git a/libavcodec/mediacodec_wrapper.c b/libavcodec/mediacodec_wrapper.c
index 5567cb4766..c05b6fd482 100644
--- a/libavcodec/mediacodec_wrapper.c
+++ b/libavcodec/mediacodec_wrapper.c
@@ -32,9 +32,6 @@
 
 struct JNIAMediaCodecListFields {
 
-    jclass mediaformat_class;
-    jmethodID create_video_format_id;
-
     jclass mediacodec_list_class;
     jmethodID init_id;
     jmethodID find_decoder_for_format_id;
@@ -50,9 +47,6 @@ struct JNIAMediaCodecListFields {
 } JNIAMediaCodecListFields;
 
 static const struct FFJniField jni_amediacodeclist_mapping[] = {
-    { "android/media/MediaFormat", NULL, NULL, FF_JNI_CLASS, offsetof(struct JNIAMediaCodecListFields, mediaformat_class), 1 },
-        { "android/media/MediaFormat", "createVideoFormat", "(Ljava/lang/String;II)Landroid/media/MediaFormat;", FF_JNI_STATIC_METHOD, offsetof(struct JNIAMediaCodecListFields, create_video_format_id), 1 },
-
     { "android/media/MediaCodecList", NULL, NULL, FF_JNI_CLASS, offsetof(struct JNIAMediaCodecListFields, mediacodec_list_class), 1 },
         { "android/media/MediaCodecList", "<init>", "(I)V", FF_JNI_METHOD, offsetof(struct JNIAMediaCodecListFields, init_id), 0 },
         { "android/media/MediaCodecList", "findDecoderForFormat", "(Landroid/media/MediaFormat;)Ljava/lang/String;", FF_JNI_METHOD, offsetof(struct JNIAMediaCodecListFields, find_decoder_for_format_id), 0 },
@@ -273,7 +267,7 @@ struct FFAMediaCodec {
         ff_jni_detach_env(log_ctx);            \
 } while (0)
 
-char *ff_AMediaCodecList_getCodecNameByType(const char *mime, int width, int height, void *log_ctx)
+char *ff_AMediaCodecList_getCodecNameByType(const char *mime, void *log_ctx)
 {
     int ret;
     char *name = NULL;
@@ -282,9 +276,11 @@ char *ff_AMediaCodecList_getCodecNameByType(const char *mime, int width, int hei
     int attached = 0;
     JNIEnv *env = NULL;
     struct JNIAMediaCodecListFields jfields = { 0 };
+    struct JNIAMediaFormatFields mediaformat_jfields = { 0 };
 
     jobject format = NULL;
     jobject codec = NULL;
+    jstring key = NULL;
     jstring tmp = NULL;
 
     jobject info = NULL;
@@ -297,16 +293,34 @@ char *ff_AMediaCodecList_getCodecNameByType(const char *mime, int width, int hei
         goto done;
     }
 
+    if ((ret = ff_jni_init_jfields(env, &mediaformat_jfields, jni_amediaformat_mapping, 0, log_ctx)) < 0) {
+        goto done;
+    }
+
     if (jfields.init_id && jfields.find_decoder_for_format_id) {
+        key = ff_jni_utf_chars_to_jstring(env, "mime", log_ctx);
+        if (!key) {
+            goto done;
+        }
+
         tmp = ff_jni_utf_chars_to_jstring(env, mime, log_ctx);
         if (!tmp) {
             goto done;
         }
 
-        format = (*env)->CallStaticObjectMethod(env, jfields.mediaformat_class, jfields.create_video_format_id, tmp, width, height);
+        format = (*env)->NewObject(env, mediaformat_jfields.mediaformat_class, mediaformat_jfields.init_id);
         if (ff_jni_exception_check(env, 1, log_ctx) < 0) {
             goto done;
         }
+
+        (*env)->CallVoidMethod(env, format, mediaformat_jfields.set_string_id, key, tmp);
+        if (ff_jni_exception_check(env, 1, log_ctx) < 0) {
+            goto done;
+        }
+
+        (*env)->DeleteLocalRef(env, key);
+        key = NULL;
+
         (*env)->DeleteLocalRef(env, tmp);
         tmp = NULL;
 
@@ -321,7 +335,7 @@ char *ff_AMediaCodecList_getCodecNameByType(const char *mime, int width, int hei
         }
         if (!tmp) {
             av_log(NULL, AV_LOG_ERROR, "Could not find decoder in media codec list "
-                                       "for format { mime=%s width=%d height=%d }\n", mime, width, height);
+                                       "for format { mime=%s }\n", mime);
             goto done;
         }
 
@@ -418,6 +432,10 @@ done:
         (*env)->DeleteLocalRef(env, codec);
     }
 
+    if (key) {
+        (*env)->DeleteLocalRef(env, key);
+    }
+
     if (tmp) {
         (*env)->DeleteLocalRef(env, tmp);
     }
@@ -437,6 +455,7 @@ done:
     av_freep(&supported_type);
 
     ff_jni_reset_jfields(env, &jfields, jni_amediacodeclist_mapping, 0, log_ctx);
+    ff_jni_reset_jfields(env, &mediaformat_jfields, jni_amediaformat_mapping, 0, log_ctx);
 
     JNI_DETACH_ENV(attached, log_ctx);
 
diff --git a/libavcodec/mediacodec_wrapper.h b/libavcodec/mediacodec_wrapper.h
index a804b616da..36cd258e06 100644
--- a/libavcodec/mediacodec_wrapper.h
+++ b/libavcodec/mediacodec_wrapper.h
@@ -52,7 +52,7 @@
  *
  */
 
-char *ff_AMediaCodecList_getCodecNameByType(const char *mime, int width, int height, void *log_ctx);
+char *ff_AMediaCodecList_getCodecNameByType(const char *mime, void *log_ctx);
 
 struct FFAMediaFormat;
 typedef struct FFAMediaFormat FFAMediaFormat;
diff --git a/libavcodec/mediacodecdec.c b/libavcodec/mediacodecdec.c
index c21cebae94..712f984701 100644
--- a/libavcodec/mediacodecdec.c
+++ b/libavcodec/mediacodecdec.c
@@ -311,7 +311,7 @@ int ff_mediacodec_dec_init(AVCodecContext *avctx, MediaCodecDecContext *s,
 
     s->first_buffer_at = av_gettime();
 
-    s->codec_name = ff_AMediaCodecList_getCodecNameByType(mime, avctx->width, avctx->height, avctx);
+    s->codec_name = ff_AMediaCodecList_getCodecNameByType(mime, avctx);
     if (!s->codec_name) {
         ret = AVERROR_EXTERNAL;
         goto fail;
-- 
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