Matthieu Bouron:
> This will allow users to pass the Android ApplicationContext which is
> mandatory
> to retrieve the ContentResolver responsible to resolve/open Android
> content-uri.
> ---
> doc/APIchanges | 3 +++
> libavcodec/jni.c | 42 ++++++++++++++++++++++++++++++++++++++++++
> libavcodec/jni.h | 17 +++++++++++++++++
> 3 files changed, 62 insertions(+)
>
> diff --git a/doc/APIchanges b/doc/APIchanges
> index a44c8e4f10..ae1868047e 100644
> --- a/doc/APIchanges
> +++ b/doc/APIchanges
> @@ -2,6 +2,9 @@ The last version increases of all libraries were on 2024-03-07
>
> API changes, most recent first:
>
> +2024-03-xx - xxxxxxxxxx - lavc 61.2.100 - jni.h
> + Add av_jni_set_android_app_ctx() and av_jni_get_android_app_ctx().
> +
> 2024-03-xx - xxxxxxxxxx - lavu 59.2.100 - channel_layout.h
> Add AV_CHANNEL_LAYOUT_RETYPE_FLAG_CANONICAL.
>
> diff --git a/libavcodec/jni.c b/libavcodec/jni.c
> index ae6490de9d..cfe95bd1ec 100644
> --- a/libavcodec/jni.c
> +++ b/libavcodec/jni.c
> @@ -77,3 +77,45 @@ void *av_jni_get_java_vm(void *log_ctx)
> }
>
> #endif
> +
> +#if defined(__ANDROID__)
> +
> +int av_jni_set_android_app_ctx(void *app_ctx, void *log_ctx)
> +{
> +#if CONFIG_JNI
> + JNIEnv *env = ff_jni_get_env(log_ctx);
> + if (!env)
> + return AVERROR(EINVAL);
> +
> + jobjectRefType type = (*env)->GetObjectRefType(env, app_ctx);
> + if (type != JNIGlobalRefType) {
> + av_log(log_ctx, AV_LOG_ERROR, "Application context must be passed as
> a global reference");
> + return AVERROR(EINVAL);
> + }
> +
> + pthread_mutex_lock(&lock);
> + android_app_ctx = app_ctx;
> + pthread_mutex_unlock(&lock);
> +
> + return 0;
> +#else
> + return AVERROR(ENOSYS);
> +#endif
> +}
> +
> +void *av_jni_get_android_app_ctx(void)
> +{
> +#if CONFIG_JNI
> + void *ctx;
> +
> + pthread_mutex_lock(&lock);
> + ctx = android_app_ctx;
> + pthread_mutex_unlock(&lock);
> +
> + return ctx;
> +#else
> + return NULL;
> +#endif
> +}
> +
> +#endif
> diff --git a/libavcodec/jni.h b/libavcodec/jni.h
> index dd99e92611..da8025f830 100644
> --- a/libavcodec/jni.h
> +++ b/libavcodec/jni.h
> @@ -43,4 +43,21 @@ int av_jni_set_java_vm(void *vm, void *log_ctx);
> */
> void *av_jni_get_java_vm(void *log_ctx);
>
> +/*
> + * Set the Android application context which will be used to retrieve the
> Android
> + * content resolver to resolve content uris.
> + *
> + * @param app_ctx global JNI reference to the Android application context
> + * @return 0 on success, < 0 otherwise
> + */
> +int av_jni_set_android_app_ctx(void *app_ctx, void *log_ctx);
> +
> +/*
> + * Get the Android application context that has been set with
> + * av_jni_set_android_app_ctx.
> + *
> + * @return a pointer the the Android application context
> + */
> +void *av_jni_get_android_app_ctx(void);
This should mention that these functions are only available on android.
> +
> #endif /* AVCODEC_JNI_H */
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