Movie.cpp revision 304cc5387478618164cd9167f12564f91eb6cc66
1#include "Canvas.h" 2#include "ScopedLocalRef.h" 3#include "SkFrontBufferedStream.h" 4#include "SkMovie.h" 5#include "SkStream.h" 6#include "GraphicsJNI.h" 7#include "SkTemplates.h" 8#include "SkUtils.h" 9#include "Utils.h" 10#include "CreateJavaOutputStreamAdaptor.h" 11#include "Paint.h" 12 13#include <androidfw/Asset.h> 14#include <androidfw/ResourceTypes.h> 15#include <netinet/in.h> 16 17#include "core_jni_helpers.h" 18 19static jclass gMovie_class; 20static jmethodID gMovie_constructorMethodID; 21static jfieldID gMovie_nativeInstanceID; 22 23jobject create_jmovie(JNIEnv* env, SkMovie* moov) { 24 if (NULL == moov) { 25 return NULL; 26 } 27 return env->NewObject(gMovie_class, gMovie_constructorMethodID, 28 static_cast<jlong>(reinterpret_cast<uintptr_t>(moov))); 29} 30 31static SkMovie* J2Movie(JNIEnv* env, jobject movie) { 32 SkASSERT(env); 33 SkASSERT(movie); 34 SkASSERT(env->IsInstanceOf(movie, gMovie_class)); 35 SkMovie* m = (SkMovie*)env->GetLongField(movie, gMovie_nativeInstanceID); 36 SkASSERT(m); 37 return m; 38} 39 40/////////////////////////////////////////////////////////////////////////////// 41 42static jint movie_width(JNIEnv* env, jobject movie) { 43 NPE_CHECK_RETURN_ZERO(env, movie); 44 return static_cast<jint>(J2Movie(env, movie)->width()); 45} 46 47static jint movie_height(JNIEnv* env, jobject movie) { 48 NPE_CHECK_RETURN_ZERO(env, movie); 49 return static_cast<jint>(J2Movie(env, movie)->height()); 50} 51 52static jboolean movie_isOpaque(JNIEnv* env, jobject movie) { 53 NPE_CHECK_RETURN_ZERO(env, movie); 54 return J2Movie(env, movie)->isOpaque() ? JNI_TRUE : JNI_FALSE; 55} 56 57static jint movie_duration(JNIEnv* env, jobject movie) { 58 NPE_CHECK_RETURN_ZERO(env, movie); 59 return static_cast<jint>(J2Movie(env, movie)->duration()); 60} 61 62static jboolean movie_setTime(JNIEnv* env, jobject movie, jint ms) { 63 NPE_CHECK_RETURN_ZERO(env, movie); 64 return J2Movie(env, movie)->setTime(ms) ? JNI_TRUE : JNI_FALSE; 65} 66 67static void movie_draw(JNIEnv* env, jobject movie, jlong canvasHandle, 68 jfloat fx, jfloat fy, jlong paintHandle) { 69 NPE_CHECK_RETURN_VOID(env, movie); 70 71 android::Canvas* c = reinterpret_cast<android::Canvas*>(canvasHandle); 72 const android::Paint* p = reinterpret_cast<android::Paint*>(paintHandle); 73 74 // Canvas should never be NULL. However paint is an optional parameter and 75 // therefore may be NULL. 76 SkASSERT(c != NULL); 77 78 SkMovie* m = J2Movie(env, movie); 79 const SkBitmap& b = m->bitmap(); 80 81 c->drawBitmap(b, fx, fy, p); 82} 83 84static jobject movie_decodeAsset(JNIEnv* env, jobject clazz, jlong native_asset) { 85 android::Asset* asset = reinterpret_cast<android::Asset*>(native_asset); 86 if (asset == NULL) return NULL; 87 SkAutoTUnref<SkStreamRewindable> stream (new android::AssetStreamAdaptor(asset, 88 android::AssetStreamAdaptor::kNo_OwnAsset, 89 android::AssetStreamAdaptor::kNo_HasMemoryBase)); 90 SkMovie* moov = SkMovie::DecodeStream(stream.get()); 91 return create_jmovie(env, moov); 92} 93 94static jobject movie_decodeStream(JNIEnv* env, jobject clazz, jobject istream) { 95 96 NPE_CHECK_RETURN_ZERO(env, istream); 97 98 jbyteArray byteArray = env->NewByteArray(16*1024); 99 ScopedLocalRef<jbyteArray> scoper(env, byteArray); 100 SkStream* strm = CreateJavaInputStreamAdaptor(env, istream, byteArray); 101 if (NULL == strm) { 102 return 0; 103 } 104 105 // Need to buffer enough input to be able to rewind as much as might be read by a decoder 106 // trying to determine the stream's format. The only decoder for movies is GIF, which 107 // will only read 6. 108 // FIXME: Get this number from SkImageDecoder 109 SkAutoTUnref<SkStreamRewindable> bufferedStream(SkFrontBufferedStream::Create(strm, 6)); 110 SkASSERT(bufferedStream.get() != NULL); 111 112 SkMovie* moov = SkMovie::DecodeStream(bufferedStream); 113 strm->unref(); 114 return create_jmovie(env, moov); 115} 116 117static jobject movie_decodeByteArray(JNIEnv* env, jobject clazz, 118 jbyteArray byteArray, 119 jint offset, jint length) { 120 121 NPE_CHECK_RETURN_ZERO(env, byteArray); 122 123 int totalLength = env->GetArrayLength(byteArray); 124 if ((offset | length) < 0 || offset + length > totalLength) { 125 doThrowAIOOBE(env); 126 return 0; 127 } 128 129 AutoJavaByteArray ar(env, byteArray); 130 SkMovie* moov = SkMovie::DecodeMemory(ar.ptr() + offset, length); 131 return create_jmovie(env, moov); 132} 133 134static void movie_destructor(JNIEnv* env, jobject, jlong movieHandle) { 135 SkMovie* movie = (SkMovie*) movieHandle; 136 delete movie; 137} 138 139////////////////////////////////////////////////////////////////////////////////////////////// 140 141static JNINativeMethod gMethods[] = { 142 { "width", "()I", (void*)movie_width }, 143 { "height", "()I", (void*)movie_height }, 144 { "isOpaque", "()Z", (void*)movie_isOpaque }, 145 { "duration", "()I", (void*)movie_duration }, 146 { "setTime", "(I)Z", (void*)movie_setTime }, 147 { "nDraw", "(JFFJ)V", 148 (void*)movie_draw }, 149 { "nativeDecodeAsset", "(J)Landroid/graphics/Movie;", 150 (void*)movie_decodeAsset }, 151 { "nativeDecodeStream", "(Ljava/io/InputStream;)Landroid/graphics/Movie;", 152 (void*)movie_decodeStream }, 153 { "nativeDestructor","(J)V", (void*)movie_destructor }, 154 { "decodeByteArray", "([BII)Landroid/graphics/Movie;", 155 (void*)movie_decodeByteArray }, 156}; 157 158int register_android_graphics_Movie(JNIEnv* env) 159{ 160 gMovie_class = android::FindClassOrDie(env, "android/graphics/Movie"); 161 gMovie_class = android::MakeGlobalRefOrDie(env, gMovie_class); 162 163 gMovie_constructorMethodID = android::GetMethodIDOrDie(env, gMovie_class, "<init>", "(J)V"); 164 165 gMovie_nativeInstanceID = android::GetFieldIDOrDie(env, gMovie_class, "mNativeMovie", "J"); 166 167 return android::RegisterMethodsOrDie(env, "android/graphics/Movie", gMethods, NELEM(gMethods)); 168} 169