1 files changed, 404 insertions, 0 deletions

diff --git a/video/out/hwdec/hwdec_aimagereader.c b/video/out/hwdec/hwdec_aimagereader.c
new file mode 100644
index 0000000000..1aa92eea4a
--- /dev/null
+++ b/video/out/hwdec/hwdec_aimagereader.c
@@ -0,0 +1,404 @@
+/*
+ * Copyright (c) 2021 sfan5 <sfan5@live.de>
+ *
+ * This file is part of mpv.
+ *
+ * mpv is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * mpv is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with mpv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+#include <dlfcn.h>
+#include <EGL/egl.h>
+#include <media/NdkImageReader.h>
+#include <android/native_window_jni.h>
+#include <libavcodec/mediacodec.h>
+#include <libavutil/hwcontext.h>
+#include <libavutil/hwcontext_mediacodec.h>
+
+#include "misc/jni.h"
+#include "osdep/threads.h"
+#include "osdep/timer.h"
+#include "video/out/gpu/hwdec.h"
+#include "video/out/opengl/ra_gl.h"
+
+typedef void *GLeglImageOES;
+typedef void *EGLImageKHR;
+#define EGL_NATIVE_BUFFER_ANDROID 0x3140
+
+struct priv_owner {
+    struct mp_hwdec_ctx hwctx;
+    AImageReader *reader;
+    jobject surface;
+    void *lib_handle;
+
+    media_status_t (*AImageReader_newWithUsage)(
+        int32_t, int32_t, int32_t, uint64_t, int32_t, AImageReader **);
+    media_status_t (*AImageReader_getWindow)(
+        AImageReader *, ANativeWindow **);
+    media_status_t (*AImageReader_setImageListener)(
+        AImageReader *, AImageReader_ImageListener *);
+    media_status_t (*AImageReader_acquireLatestImage)(AImageReader *, AImage **);
+    void (*AImageReader_delete)(AImageReader *);
+    media_status_t (*AImage_getHardwareBuffer)(const AImage *, AHardwareBuffer **);
+    void (*AImage_delete)(AImage *);
+    void (*AHardwareBuffer_describe)(const AHardwareBuffer *, AHardwareBuffer_Desc *);
+    jobject (*ANativeWindow_toSurface)(JNIEnv *, ANativeWindow *);
+};
+
+struct priv {
+    struct mp_log *log;
+
+    GLuint gl_texture;
+    AImage *image;
+    EGLImageKHR egl_image;
+
+    mp_mutex lock;
+    mp_cond cond;
+    bool image_available;
+
+    EGLImageKHR (EGLAPIENTRY *CreateImageKHR)(
+        EGLDisplay, EGLContext, EGLenum, EGLClientBuffer, const EGLint *);
+    EGLBoolean (EGLAPIENTRY *DestroyImageKHR)(EGLDisplay, EGLImageKHR);
+    EGLClientBuffer (EGLAPIENTRY *GetNativeClientBufferANDROID)(
+        const struct AHardwareBuffer *);
+    void (EGLAPIENTRY *EGLImageTargetTexture2DOES)(GLenum, GLeglImageOES);
+};
+
+static const struct { const char *symbol; int offset; } lib_functions[] = {
+    { "AImageReader_newWithUsage", offsetof(struct priv_owner, AImageReader_newWithUsage) },
+    { "AImageReader_getWindow", offsetof(struct priv_owner, AImageReader_getWindow) },
+    { "AImageReader_setImageListener", offsetof(struct priv_owner, AImageReader_setImageListener) },
+    { "AImageReader_acquireLatestImage", offsetof(struct priv_owner, AImageReader_acquireLatestImage) },
+    { "AImageReader_delete", offsetof(struct priv_owner, AImageReader_delete) },
+    { "AImage_getHardwareBuffer", offsetof(struct priv_owner, AImage_getHardwareBuffer) },
+    { "AImage_delete", offsetof(struct priv_owner, AImage_delete) },
+    { "AHardwareBuffer_describe", offsetof(struct priv_owner, AHardwareBuffer_describe) },
+    { "ANativeWindow_toSurface", offsetof(struct priv_owner, ANativeWindow_toSurface) },
+    { NULL, 0 },
+};
+
+
+static AVBufferRef *create_mediacodec_device_ref(jobject surface)
+{
+    AVBufferRef *device_ref = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_MEDIACODEC);
+    if (!device_ref)
+        return NULL;
+
+    AVHWDeviceContext *ctx = (void *)device_ref->data;
+    AVMediaCodecDeviceContext *hwctx = ctx->hwctx;
+    hwctx->surface = surface;
+
+    if (av_hwdevice_ctx_init(device_ref) < 0)
+        av_buffer_unref(&device_ref);
+
+    return device_ref;
+}
+
+static bool load_lib_functions(struct priv_owner *p, struct mp_log *log)
+{
+    p->lib_handle = dlopen("libmediandk.so", RTLD_NOW | RTLD_GLOBAL);
+    if (!p->lib_handle)
+        return false;
+    for (int i = 0; lib_functions[i].symbol; i++) {
+        const char *sym = lib_functions[i].symbol;
+        void *fun = dlsym(p->lib_handle, sym);
+        if (!fun)
+            fun = dlsym(RTLD_DEFAULT, sym);
+        if (!fun) {
+            mp_warn(log, "Could not resolve symbol %s\n", sym);
+            return false;
+        }
+
+        *(void **) ((uint8_t*)p + lib_functions[i].offset) = fun;
+    }
+    return true;
+}
+
+static int init(struct ra_hwdec *hw)
+{
+    struct priv_owner *p = hw->priv;
+
+    if (!ra_is_gl(hw->ra_ctx->ra))
+        return -1;
+    if (!eglGetCurrentContext())
+        return -1;
+
+    const char *exts = eglQueryString(eglGetCurrentDisplay(), EGL_EXTENSIONS);
+    if (!gl_check_extension(exts, "EGL_ANDROID_image_native_buffer"))
+        return -1;
+
+    JNIEnv *env = MP_JNI_GET_ENV(hw);
+    if (!env)
+        return -1;
+
+    if (!load_lib_functions(p, hw->log))
+        return -1;
+
+    static const char *es2_exts[] = {"GL_OES_EGL_image_external", 0};
+    static const char *es3_exts[] = {"GL_OES_EGL_image_external_essl3", 0};
+    GL *gl = ra_gl_get(hw->ra_ctx->ra);
+    if (gl_check_extension(gl->extensions, es3_exts[0]))
+        hw->glsl_extensions = es3_exts;
+    else
+        hw->glsl_extensions = es2_exts;
+
+    // dummy dimensions, AImageReader only transports hardware buffers
+    media_status_t ret = p->AImageReader_newWithUsage(16, 16,
+        AIMAGE_FORMAT_PRIVATE, AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE,
+        5, &p->reader);
+    if (ret != AMEDIA_OK) {
+        MP_ERR(hw, "newWithUsage failed: %d\n", ret);
+        return -1;
+    }
+    assert(p->reader);
+
+    ANativeWindow *window;
+    ret = p->AImageReader_getWindow(p->reader, &window);
+    if (ret != AMEDIA_OK) {
+        MP_ERR(hw, "getWindow failed: %d\n", ret);
+        return -1;
+    }
+    assert(window);
+
+    jobject surface = p->ANativeWindow_toSurface(env, window);
+    p->surface = (*env)->NewGlobalRef(env, surface);
+    (*env)->DeleteLocalRef(env, surface);
+
+    p->hwctx = (struct mp_hwdec_ctx) {
+        .driver_name = hw->driver->name,
+        .av_device_ref = create_mediacodec_device_ref(p->surface),
+        .hw_imgfmt = IMGFMT_MEDIACODEC,
+    };
+
+    if (!p->hwctx.av_device_ref) {
+        MP_VERBOSE(hw, "Failed to create hwdevice_ctx\n");
+        return -1;
+    }
+
+    hwdec_devices_add(hw->devs, &p->hwctx);
+
+    return 0;
+}
+
+static void uninit(struct ra_hwdec *hw)
+{
+    struct priv_owner *p = hw->priv;
+
+    if (p->surface) {
+        JNIEnv *env = MP_JNI_GET_ENV(hw);
+        assert(env);
+        (*env)->DeleteGlobalRef(env, p->surface);
+        p->surface = NULL;
+    }
+
+    if (p->reader) {
+        p->AImageReader_delete(p->reader);
+        p->reader = NULL;
+    }
+
+    hwdec_devices_remove(hw->devs, &p->hwctx);
+    av_buffer_unref(&p->hwctx.av_device_ref);
+
+    if (p->lib_handle) {
+        dlclose(p->lib_handle);
+        p->lib_handle = NULL;
+    }
+}
+
+static void image_callback(void *context, AImageReader *reader)
+{
+    struct priv *p = context;
+
+    mp_mutex_lock(&p->lock);
+    p->image_available = true;
+    mp_cond_signal(&p->cond);
+    mp_mutex_unlock(&p->lock);
+}
+
+static int mapper_init(struct ra_hwdec_mapper *mapper)
+{
+    struct priv *p = mapper->priv;
+    struct priv_owner *o = mapper->owner->priv;
+    GL *gl = ra_gl_get(mapper->ra);
+
+    p->log = mapper->log;
+    mp_mutex_init(&p->lock);
+    mp_cond_init(&p->cond);
+
+    p->CreateImageKHR = (void *)eglGetProcAddress("eglCreateImageKHR");
+    p->DestroyImageKHR = (void *)eglGetProcAddress("eglDestroyImageKHR");
+    p->GetNativeClientBufferANDROID =
+        (void *)eglGetProcAddress("eglGetNativeClientBufferANDROID");
+    p->EGLImageTargetTexture2DOES =
+        (void *)eglGetProcAddress("glEGLImageTargetTexture2DOES");
+
+    if (!p->CreateImageKHR || !p->DestroyImageKHR ||
+        !p->GetNativeClientBufferANDROID || !p->EGLImageTargetTexture2DOES)
+        return -1;
+
+    AImageReader_ImageListener listener = {
+        .context = p,
+        .onImageAvailable = image_callback,
+    };
+    o->AImageReader_setImageListener(o->reader, &listener);
+
+    mapper->dst_params = mapper->src_params;
+    mapper->dst_params.imgfmt = IMGFMT_RGB0;
+    mapper->dst_params.hw_subfmt = 0;
+
+    // texture creation
+    gl->GenTextures(1, &p->gl_texture);
+    gl->BindTexture(GL_TEXTURE_EXTERNAL_OES, p->gl_texture);
+    gl->TexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    gl->TexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    gl->TexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    gl->TexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    gl->BindTexture(GL_TEXTURE_EXTERNAL_OES, 0);
+
+    struct ra_tex_params params = {
+        .dimensions = 2,
+        .w = mapper->src_params.w,
+        .h = mapper->src_params.h,
+        .d = 1,
+        .format = ra_find_unorm_format(mapper->ra, 1, 4),
+        .render_src = true,
+        .src_linear = true,
+        .external_oes = true,
+    };
+
+    if (params.format->ctype != RA_CTYPE_UNORM)
+        return -1;
+
+    mapper->tex[0] = ra_create_wrapped_tex(mapper->ra, &params, p->gl_texture);
+    if (!mapper->tex[0])
+        return -1;
+
+    return 0;
+}
+
+static void mapper_uninit(struct ra_hwdec_mapper *mapper)
+{
+    struct priv *p = mapper->priv;
+    struct priv_owner *o = mapper->owner->priv;
+    GL *gl = ra_gl_get(mapper->ra);
+
+    o->AImageReader_setImageListener(o->reader, NULL);
+
+    gl->DeleteTextures(1, &p->gl_texture);
+    p->gl_texture = 0;
+
+    ra_tex_free(mapper->ra, &mapper->tex[0]);
+
+    mp_mutex_destroy(&p->lock);
+    mp_cond_destroy(&p->cond);
+}
+
+static void mapper_unmap(struct ra_hwdec_mapper *mapper)
+{
+    struct priv *p = mapper->priv;
+    struct priv_owner *o = mapper->owner->priv;
+
+    if (p->egl_image) {
+        p->DestroyImageKHR(eglGetCurrentDisplay(), p->egl_image);
+        p->egl_image = 0;
+    }
+
+    if (p->image) {
+        o->AImage_delete(p->image);
+        p->image = NULL;
+    }
+}
+
+static int mapper_map(struct ra_hwdec_mapper *mapper)
+{
+    struct priv *p = mapper->priv;
+    struct priv_owner *o = mapper->owner->priv;
+    GL *gl = ra_gl_get(mapper->ra);
+
+    {
+        if (mapper->src->imgfmt != IMGFMT_MEDIACODEC)
+            return -1;
+        AVMediaCodecBuffer *buffer = (AVMediaCodecBuffer *)mapper->src->planes[3];
+        av_mediacodec_release_buffer(buffer, 1);
+    }
+
+    bool image_available = false;
+    mp_mutex_lock(&p->lock);
+    if (!p->image_available) {
+        mp_cond_timedwait(&p->cond, &p->lock, MP_TIME_MS_TO_NS(100));
+        if (!p->image_available)
+            MP_WARN(mapper, "Waiting for frame timed out!\n");
+    }
+    image_available = p->image_available;
+    p->image_available = false;
+    mp_mutex_unlock(&p->lock);
+
+    media_status_t ret = o->AImageReader_acquireLatestImage(o->reader, &p->image);
+    if (ret != AMEDIA_OK) {
+        MP_ERR(mapper, "acquireLatestImage failed: %d\n", ret);
+        // If we merely timed out waiting return success anyway to avoid
+        // flashing frames of render errors.
+        return image_available ? -1 : 0;
+    }
+    assert(p->image);
+
+    AHardwareBuffer *hwbuf = NULL;
+    ret = o->AImage_getHardwareBuffer(p->image, &hwbuf);
+    if (ret != AMEDIA_OK) {
+        MP_ERR(mapper, "getHardwareBuffer failed: %d\n", ret);
+        return -1;
+    }
+    assert(hwbuf);
+
+    // Update texture size since it may differ
+    AHardwareBuffer_Desc d;
+    o->AHardwareBuffer_describe(hwbuf, &d);
+    if (mapper->tex[0]->params.w != d.width || mapper->tex[0]->params.h != d.height) {
+        MP_VERBOSE(p, "Texture dimensions changed to %dx%d\n", d.width, d.height);
+        mapper->tex[0]->params.w = d.width;
+        mapper->tex[0]->params.h = d.height;
+    }
+
+    EGLClientBuffer buf = p->GetNativeClientBufferANDROID(hwbuf);
+    if (!buf)
+        return -1;
+
+    const int attribs[] = {EGL_NONE};
+    p->egl_image = p->CreateImageKHR(eglGetCurrentDisplay(),
+        EGL_NO_CONTEXT, EGL_NATIVE_BUFFER_ANDROID, buf, attribs);
+    if (!p->egl_image)
+        return -1;
+
+    gl->BindTexture(GL_TEXTURE_EXTERNAL_OES, p->gl_texture);
+    p->EGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, p->egl_image);
+    gl->BindTexture(GL_TEXTURE_EXTERNAL_OES, 0);
+
+    return 0;
+}
+
+
+const struct ra_hwdec_driver ra_hwdec_aimagereader = {
+    .name = "aimagereader",
+    .priv_size = sizeof(struct priv_owner),
+    .imgfmts = {IMGFMT_MEDIACODEC, 0},
+    .init = init,
+    .uninit = uninit,
+    .mapper = &(const struct ra_hwdec_mapper_driver){
+        .priv_size = sizeof(struct priv),
+        .init = mapper_init,
+        .uninit = mapper_uninit,
+        .map = mapper_map,
+        .unmap = mapper_unmap,
+    },
+};