nuclear@6: #include <stdio.h>
nuclear@9: #include <string.h>
nuclear@6: #include <assert.h>
nuclear@6: #include <jni.h>
nuclear@6: #include "opengl.h"
nuclear@6: #include "camera.h"
nuclear@6: 
nuclear@6: 
nuclear@6: static JavaVM *jvm;
nuclear@6: static JNIEnv *jni;
nuclear@6: static jclass activity_class;
nuclear@6: static unsigned int tex;
nuclear@9: static float tex_matrix[16];
nuclear@9: static const float identity_matrix[] = {1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1};
nuclear@9: static jfloatArray jtex_matrix;
nuclear@6: static int capturing;
nuclear@6: 
nuclear@6: int cam_init(void *platform_data)
nuclear@6: {
nuclear@6: 	int glerr;
nuclear@6: 	struct cam_android_platform_data *pdata = platform_data;
nuclear@6: 
nuclear@6: 	jvm = pdata->vm;
nuclear@6: 	jni = pdata->jni;
nuclear@6: 	activity_class = pdata->activity_class;
nuclear@6: 
nuclear@9: 	jtex_matrix = (*jni)->NewFloatArray(jni, 16);
nuclear@9: 
nuclear@6: 	// create the camera texture
nuclear@6: 	assert(glGetError() == GL_NO_ERROR);
nuclear@6: 	glGenTextures(1, &tex);
nuclear@6: 	glBindTexture(GL_TEXTURE_EXTERNAL_OES, tex);
nuclear@6: 	glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
nuclear@6: 	glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
nuclear@6: 
nuclear@6: 	glerr = glGetError();
nuclear@6: 	assert(glerr == GL_NO_ERROR);
nuclear@6: 	return glerr == GL_NO_ERROR ? 0 : -1;
nuclear@6: }
nuclear@6: 
nuclear@6: void cam_shutdown(void)
nuclear@6: {
nuclear@6: 	cam_stop_video();
nuclear@6: 	glDeleteTextures(1, &tex);
nuclear@6: 	tex = 0;
nuclear@9: 
nuclear@9: 	if(jni) {
nuclear@9: 		(*jni)->DeleteGlobalRef(jni, jtex_matrix);
nuclear@9: 	}
nuclear@6: }
nuclear@6: 
nuclear@6: unsigned int cam_texture(void)
nuclear@6: {
nuclear@6: 	return tex;
nuclear@6: }
nuclear@6: 
nuclear@9: const float *cam_texture_matrix(void)
nuclear@6: {
nuclear@9: 	return tex_matrix;
nuclear@6: }
nuclear@6: 
nuclear@6: int cam_start_video(void)
nuclear@6: {
nuclear@6: 	jmethodID method;
nuclear@6: 
nuclear@6: 	if(!jvm) {
nuclear@6: 		fprintf(stderr, "failed to start video, camera not initialized\n");
nuclear@6: 		return -1;
nuclear@6: 	}
nuclear@6: 	if(cam_is_capturing()) {
nuclear@6: 		return 0;
nuclear@6: 	}
nuclear@6: 
nuclear@6: 	if(!(method = (*jni)->GetStaticMethodID(jni, activity_class, "start_video", "(I)I"))) {
nuclear@6: 		fprintf(stderr, "failed to find static method: start_video\n");
nuclear@6: 		return -1;
nuclear@6: 	}
nuclear@6: 	if((*jni)->CallStaticIntMethod(jni, activity_class, method, tex) == -1) {
nuclear@6: 		fprintf(stderr, "failed to start video capture\n");
nuclear@6: 		capturing = 0;
nuclear@6: 		return -1;
nuclear@6: 	}
nuclear@6: 	capturing = 1;
nuclear@6: 
nuclear@6: 	printf("video started\n");
nuclear@6: 
nuclear@6: 	return 1;
nuclear@6: }
nuclear@6: 
nuclear@6: int cam_stop_video(void)
nuclear@6: {
nuclear@6: 	jmethodID method;
nuclear@6: 
nuclear@6: 	if(!jvm) {
nuclear@6: 		fprintf(stderr, "failed to stop video, camera not initialized\n");
nuclear@6: 		return -1;
nuclear@6: 	}
nuclear@6: 
nuclear@6: 	if(!cam_is_capturing()) {
nuclear@6: 		return 0;
nuclear@6: 	}
nuclear@6: 
nuclear@6: 	if(!(method = (*jni)->GetStaticMethodID(jni, activity_class, "stop_video", "()V"))) {
nuclear@6: 		fprintf(stderr, "failed to find static method: stop_video\n");
nuclear@6: 		return -1;
nuclear@6: 	}
nuclear@6: 	(*jni)->CallStaticVoidMethod(jni, activity_class, method);
nuclear@6: 	capturing = 0;
nuclear@6: 
nuclear@6: 	printf("video stopped\n");
nuclear@6: 
nuclear@6: 	return 0;
nuclear@6: }
nuclear@6: 
nuclear@8: int cam_update(void)
nuclear@7: {
nuclear@9: 	static int texmat_fail_warned;
nuclear@7: 	jmethodID method;
nuclear@9: 	float *ptr;
nuclear@7: 
nuclear@7: 	if(!jvm) {
nuclear@7: 		fprintf(stderr, "failed to update camera\n");
nuclear@7: 		return -1;
nuclear@7: 	}
nuclear@7: 	if(!cam_is_capturing()) {
nuclear@7: 		return 0;
nuclear@7: 	}
nuclear@7: 
nuclear@9: 	if(!(method = (*jni)->GetStaticMethodID(jni, activity_class, "update", "([F)V"))) {
nuclear@7: 		fprintf(stderr, "failed to find static method: update\n");
nuclear@7: 		return -1;
nuclear@7: 	}
nuclear@9: 	(*jni)->CallStaticVoidMethod(jni, activity_class, method, jtex_matrix);
nuclear@9: 
nuclear@9: 	if(!(ptr = (*jni)->GetFloatArrayElements(jni, jtex_matrix, 0))) {
nuclear@9: 		if(!texmat_fail_warned) {
nuclear@9: 			fprintf(stderr, "failed to get texture matrix\n");
nuclear@9: 			texmat_fail_warned = 1;
nuclear@9: 		}
nuclear@9: 		memcpy(tex_matrix, identity_matrix, sizeof identity_matrix);
nuclear@9: 	} else {
nuclear@9: 		memcpy(tex_matrix, ptr, 16 * sizeof *ptr);
nuclear@9: 		(*jni)->ReleaseFloatArrayElements(jni, jtex_matrix, ptr, JNI_ABORT);
nuclear@9: 	}
nuclear@9: 
nuclear@8: 	return 0;
nuclear@7: }
nuclear@7: 
nuclear@6: int cam_is_capturing(void)
nuclear@6: {
nuclear@6: 	return capturing;	// XXX is it better to do this properly through JNI?
nuclear@6: }
nuclear@6: 
nuclear@9: int cam_video_size(int *xsz, int *ysz)
nuclear@9: {
nuclear@9: 	jfieldID jwidth, jheight;
nuclear@9: 
nuclear@9: 	if(!(jwidth = (*jni)->GetStaticFieldID(jni, activity_class, "preview_width", "I")) ||
nuclear@9: 			!(jheight = (*jni)->GetStaticFieldID(jni, activity_class, "preview_height", "I"))) {
nuclear@9: 		fprintf(stderr, "failed to retrieve preview width/height fields\n");
nuclear@9: 		*xsz = *ysz = 0;
nuclear@9: 		return -1;
nuclear@9: 	}
nuclear@9: 
nuclear@9: 	*xsz = (*jni)->GetStaticIntField(jni, activity_class, jwidth);
nuclear@9: 	*ysz = (*jni)->GetStaticIntField(jni, activity_class, jheight);
nuclear@9: 	return 0;
nuclear@9: }
nuclear@9: 
nuclear@6: int cam_take_picture(void)
nuclear@6: {
nuclear@6: 	return -1;	// TODO
nuclear@6: }