mpv/video/out/hwdec/hwdec_aimagereader.c

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/*
* 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 <pthread.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/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;
pthread_mutex_t lock;
pthread_cond_t 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);
};
const static 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))
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;
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);
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);
JNIEnv *env = MP_JNI_GET_ENV(hw);
assert(env);
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,
};
hwdec_devices_add(hw->devs, &p->hwctx);
return 0;
}
static void uninit(struct ra_hwdec *hw)
{
struct priv_owner *p = hw->priv;
JNIEnv *env = MP_JNI_GET_ENV(hw);
assert(env);
if (p->surface) {
(*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;
pthread_mutex_lock(&p->lock);
p->image_available = true;
pthread_cond_signal(&p->cond);
pthread_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;
pthread_mutex_init(&p->lock, NULL);
pthread_cond_init(&p->cond, NULL);
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]);
pthread_mutex_destroy(&p->lock);
pthread_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;
pthread_mutex_lock(&p->lock);
if (!p->image_available) {
struct timespec ts = mp_rel_time_to_timespec(0.1);
pthread_cond_timedwait(&p->cond, &p->lock, &ts);
if (!p->image_available)
MP_WARN(mapper, "Waiting for frame timed out!\n");
}
image_available = p->image_available;
p->image_available = false;
pthread_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,
},
};