From 557f23650726af7f4881d29411de02f9f8bc78f1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tomas=20H=C3=A4rdin?=
Date: Wed, 11 Jan 2023 22:25:39 +0100
Subject: [PATCH 3/4] lavc/mediacodec_wrapper: Add function for probing
supported color formats
This patch has been released by Epic Games' legal department.
---
libavcodec/mediacodec_wrapper.c | 112
libavcodec/mediacodec_wrapper.h | 15 +
2 files changed, 127 insertions(+)
diff --git a/libavcodec/mediacodec_wrapper.c b/libavcodec/mediacodec_wrapper.c
index 82eead2833..9d2560205f 100644
--- a/libavcodec/mediacodec_wrapper.c
+++ b/libavcodec/mediacodec_wrapper.c
@@ -532,6 +532,118 @@ done:
return name;
}
+int ff_AMediaCodec_color_formats_intersect(const char *codec_name, const char *mime,
+ const int *in_formats, int nin_formats,
+ int *out_formats, void *log_ctx)
+{
+int ret, found_codec = 0;
+jstring jmime = NULL;
+JNIEnv *env = NULL;
+struct JNIAMediaCodecListFields jfields = { 0 };
+struct JNIAMediaFormatFields mediaformat_jfields = { 0 };
+
+JNI_GET_ENV_OR_RETURN(env, log_ctx, -1);
+
+if ((ret = ff_jni_init_jfields(env, , jni_amediacodeclist_mapping, 0, log_ctx)) < 0) {
+goto done;
+}
+
+if ((ret = ff_jni_init_jfields(env, _jfields, jni_amediaformat_mapping, 0, log_ctx)) < 0) {
+goto done;
+}
+
+// convert const char* to java.lang.String
+jmime = ff_jni_utf_chars_to_jstring(env, mime, log_ctx);
+if (!jmime) {
+goto done;
+}
+
+int codec_count = (*env)->CallStaticIntMethod(env, jfields.mediacodec_list_class, jfields.get_codec_count_id);
+if (ff_jni_exception_check(env, 1, log_ctx) < 0) {
+goto done;
+}
+
+for (int i = 0; i < codec_count && !found_codec; i++) {
+jobject info = (*env)->CallStaticObjectMethod(env, jfields.mediacodec_list_class, jfields.get_codec_info_at_id, i);
+if (ff_jni_exception_check(env, 1, log_ctx) < 0) {
+continue;
+}
+
+char *name = NULL;
+jboolean is_copy;
+jintArray color_formats = NULL;
+jobject capabilities = NULL;
+jobject jcodec_name = (*env)->CallObjectMethod(env, info, jfields.get_name_id);
+if (ff_jni_exception_check(env, 1, log_ctx) < 0) {
+goto done_with_info;
+}
+
+if (!(name = ff_jni_jstring_to_utf_chars(env, jcodec_name, log_ctx))) {
+goto done_with_info;
+}
+
+if (strcmp(name, codec_name)) {
+goto done_with_info;
+}
+
+capabilities = (*env)->CallObjectMethod(env, info, jfields.get_codec_capabilities_id, jmime);
+if (ff_jni_exception_check(env, 1, log_ctx) < 0) {
+goto done_with_info;
+}
+
+color_formats = (*env)->GetObjectField(env, capabilities, jfields.color_formats_id);
+if (ff_jni_exception_check(env, 1, log_ctx) < 0) {
+goto done_with_info;
+}
+
+int color_count = (*env)->GetArrayLength(env, color_formats);
+int *elems = (*env)->GetIntArrayElements(env, color_formats, _copy);
+ret = 0;
+found_codec = 1;
+
+// out_formats = intersect(in_formats, elems)
+for (int j = 0; j < nin_formats; j++) {
+for (int k = 0; k < color_count; k++) {
+if (elems[k] == in_formats[j]) {
+out_formats[ret++] = in_formats[j];
+break;
+}
+}
+}
+
+(*env)->ReleaseIntArrayElements(env, color_formats, elems, JNI_ABORT);
+
+done_with_info:
+if (color_formats) {
+(*env)->DeleteLocalRef(env, color_formats);
+}
+
+if (capabilities) {
+(*env)->DeleteLocalRef(env, capabilities);
+}
+
+if (jcodec_name) {
+(*env)->DeleteLocalRef(env, jcodec_name);
+}
+
+if (info) {
+(*env)->DeleteLocalRef(env, info);
+}
+
+av_freep();
+}
+
+done:
+if (jmime) {
+(*env)->DeleteLocalRef(env, jmime);
+}
+
+ff_jni_reset_jfields(env, , jni_amediacodeclist_mapping, 0, log_ctx);
+ff_jni_reset_jfields(env, _jfields, jni_amediaformat_mapping, 0, log_ctx);
+
+return found_codec ? ret : -1;
+}
+
static FFAMediaFormat *mediaformat_jni_new(void)
{
JNIEnv *env = NULL;
diff --git a/libavcodec/mediacodec_wrapper.h b/libavcodec/mediacodec_wrapper.h
index 1b81e6db84..7ab32c4dc7 100644
--- a/libavcodec/mediacodec_wrapper.h
+++ b/libavcodec/mediacodec_wrapper.h
@@ -2,6 +2,7 @@
* Android MediaCodec Wrapper
*
* Copyright (c) 2015-2016 Matthieu Bouron
+ * Modifications by Epic Games, Inc., 2023.
*
* This file is part of FFmpeg.
*
@@ -230,6 +231,20 @@ FFAMediaCodec* ff_AMediaCodec_createCodecByName(const char *name, int ndk);
FFAMediaCodec* ff_AMediaCodec_createDecoderByType(const char *mime_type, int
