On Thu, 14 Dec 2017 18:06:11 +0100 Matthieu Bouron <matthieu.bou...@gmail.com> wrote:
> On Thu, Dec 14, 2017 at 01:02:49PM +0100, wm4 wrote:
> > On Thu, 14 Dec 2017 12:53:38 +0100
> > Matthieu Bouron <matthieu.bou...@gmail.com> wrote:
> >
> > > On Thu, Dec 14, 2017 at 12:21:28PM +0100, wm4 wrote:
> > > > On Thu, 14 Dec 2017 11:09:13 +0100
> > > > Matthieu Bouron <matthieu.bou...@gmail.com> wrote:
> > > >
> > > > > ---
> > > > > libavcodec/mediacodec_wrapper.c | 262
> > > > > +++++++++++-----------------------------
> > > > > 1 file changed, 70 insertions(+), 192 deletions(-)
> > > > >
> > > > > diff --git a/libavcodec/mediacodec_wrapper.c
> > > > > b/libavcodec/mediacodec_wrapper.c
> > > > > index f34450a6d8..4660e895ca 100644
> > > > > --- a/libavcodec/mediacodec_wrapper.c
> > > > > +++ b/libavcodec/mediacodec_wrapper.c
> > > > > @@ -1132,200 +1132,78 @@ fail:
> > > >
> > > >
> > > > > +#define DECLARE_FF_AMEDIACODEC_CREATE_FUNC(func, jfunc)
> > > > > \
> > > > > +FFAMediaCodec* ff_AMediaCodec_##func(const char *arg)
> > > > > \
> > > > > +{
> > > > > \
> > > > > + int ret = -1;
> > > > > \
> > > > > + JNIEnv *env = NULL;
> > > > > \
> > > > > + FFAMediaCodec *codec = NULL;
> > > > > \
> > > > > + jstring jarg = NULL;
> > > > > \
> > > > > + jobject object = NULL;
> > > > > \
> > > > > +
> > > > > \
> > > > > + codec = av_mallocz(sizeof(FFAMediaCodec));
> > > > > \
> > > > > + if (!codec) {
> > > > > \
> > > > > + return NULL;
> > > > > \
> > > > > + }
> > > > > \
> > > > > + codec->class = &amediacodec_class;
> > > > > \
> > > > > +
> > > > > \
> > > > > + env = ff_jni_get_env(codec);
> > > > > \
> > > > > + if (!env) {
> > > > > \
> > > > > + av_freep(&codec);
> > > > > \
> > > > > + return NULL;
> > > > > \
> > > > > + }
> > > > > \
> > > > > +
> > > > > \
> > > > > + if (ff_jni_init_jfields(env, &codec->jfields,
> > > > > jni_amediacodec_mapping, 1, codec) < 0) { \
> > > > > + goto fail;
> > > > > \
> > > > > + }
> > > > > \
> > > > > +
> > > > > \
> > > > > + jarg = ff_jni_utf_chars_to_jstring(env, arg, codec);
> > > > > \
> > > > > + if (!jarg) {
> > > > > \
> > > > > + goto fail;
> > > > > \
> > > > > + }
> > > > > \
> > > > > +
> > > > > \
> > > > > + object = (*env)->CallStaticObjectMethod(env,
> > > > > \
> > > > > +
> > > > > codec->jfields.mediacodec_class, \
> > > > > + codec->jfields.jfunc,
> > > > > \
> > > > > + jarg);
> > > > > \
> > > > > + if (ff_jni_exception_check(env, 1, codec) < 0) {
> > > > > \
> > > > > + goto fail;
> > > > > \
> > > > > + }
> > > > > \
> > > > > +
> > > > > \
> > > > > + codec->object = (*env)->NewGlobalRef(env, object);
> > > > > \
> > > > > + if (!codec->object) {
> > > > > \
> > > > > + goto fail;
> > > > > \
> > > > > + }
> > > > > \
> > > > > +
> > > > > \
> > > > > + if (codec_init_static_fields(codec) < 0) {
> > > > > \
> > > > > + goto fail;
> > > > > \
> > > > > + }
> > > > > \
> > > > > +
> > > > > \
> > > > > + if (codec->jfields.get_input_buffer_id &&
> > > > > codec->jfields.get_output_buffer_id) { \
> > > > > + codec->has_get_i_o_buffer = 1;
> > > > > \
> > > > > + }
> > > > > \
> > > > > +
> > > > > \
> > > > > + ret = 0;
> > > > > \
> > > > > +fail:
> > > > > \
> > > > > + if (jarg) {
> > > > > \
> > > > > + (*env)->DeleteLocalRef(env, jarg);
> > > > > \
> > > > > + }
> > > > > \
> > > > > +
> > > > > \
> > > > > + if (object) {
> > > > > \
> > > > > + (*env)->DeleteLocalRef(env, object);
> > > > > \
> > > > > + }
> > > > > \
> > > > > +
> > > > > \
> > > > > + if (ret < 0) {
> > > > > \
> > > > > + ff_jni_reset_jfields(env, &codec->jfields,
> > > > > jni_amediacodec_mapping, 1, codec); \
> > > > > + av_freep(&codec);
> > > > > \
> > > > > + }
> > > > > \
> > > > > +
> > > > > \
> > > > > + return codec;
> > > > > \
> > > > > }
> > > > >
> > > >
> > > > Such long macros are very ugly. And the only macro argument that is
> > > > used in the body is jfunc. Would it be possible to move most of the
> > > > macro into a proper function, with jfunc as pointer argument or so?
> > >
> > > I agree with you that such macros are ugly.
> > >
> > > I used this approach as the jfunc value cannot be known before
> > > ff_jni_init_jfields is called.
> > >
> > > I will try another approach and send a new patch.
> >
> > Right, it seems it's not as simple as passing a pointer. Maybe
> > offsetof() could help.
>
> Patch updated. I did not use offsetof as it felt a bit weird to pass an
> offset of a struct to a function to call the right method.
>
Looks much nicer!
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