想到把FFmpeg移植到Android上面
网上有现成的2.2的移植，可以下载下来，链接https://github.com/havlenapetr，里面的ffmpeg和framework下面的libaudio和libviedo两个so，就是全部的东西。
看过一些东西，都说不开放某些代码，挺没劲的，人家都已经放出全部代码了，有什么藏匿的。
app下面的代码几乎不需要修改，就是一些编译的错误，就是framework下面的本地适配需要需要改一下，适应一下ics，就是surface.cpp这个文件。
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- #include <android/surface.h>
#include <surfaceflinger/Surface.h> #include <utils/Log.h> #include <SkBitmap.h> #include <SkCanvas.h> #define TAG "SurfaceWrapper" using namespace android; static Surface *sSurface; static SkBitmap sBitmapClient; static SkBitmap sBitmapSurface; static Surface *getNativeSurface (JNIEnv * env, jobject jsurface) { jclass clazz = env->FindClass ("android/view/Surface"); jfieldID field_surface = env->GetFieldID (clazz, "mNativeSurface", "I"); if (field_surface == NULL) { return NULL; } return (Surface *) env->GetIntField (jsurface, field_surface); } static int initBitmap (SkBitmap * bitmap, int format, int width, int height, bool allocPixels) { switch (format) { case PIXEL_FORMAT_RGBA_8888: bitmap->setConfig (SkBitmap::kARGB_8888_Config, width, height); break; case PIXEL_FORMAT_RGBA_4444: bitmap->setConfig (SkBitmap::kARGB_4444_Config, width, height); break; case PIXEL_FORMAT_RGB_565: bitmap->setConfig (SkBitmap::kRGB_565_Config, width, height); break; case PIXEL_FORMAT_A_8: bitmap->setConfig (SkBitmap::kA8_Config, width, height); break; default: bitmap->setConfig (SkBitmap::kNo_Config, width, height); break; } if (allocPixels) { bitmap->setIsOpaque (true); if (!bitmap->allocPixels ()) { return -1; } } return 0; } int AndroidSurface_register (JNIEnv * env, jobject jsurface) { __android_log_print (ANDROID_LOG_INFO, TAG, "registering video surface"); sSurface = getNativeSurface (env, jsurface); if (sSurface == NULL) { return ANDROID_SURFACE_RESULT_JNI_EXCEPTION; } __android_log_print (ANDROID_LOG_INFO, TAG, "registered"); return ANDROID_SURFACE_RESULT_SUCCESS; } int AndroidSurface_getPixels (int width, int height, void **pixels) { __android_log_print (ANDROID_LOG_INFO, TAG, "getting surface's pixels %ix%i", width, height); if (sSurface == NULL) { return ANDROID_SURFACE_RESULT_JNI_EXCEPTION; } if (initBitmap (&sBitmapClient, PIXEL_FORMAT_RGB_565, width, height, true) < 0) { return ANDROID_SURFACE_RESULT_COULDNT_INIT_BITMAP_CLIENT; } *pixels = sBitmapClient.getPixels (); __android_log_print (ANDROID_LOG_INFO, TAG, "getted"); return ANDROID_SURFACE_RESULT_SUCCESS; } static void doUpdateSurface () { SkCanvas canvas (sBitmapSurface); SkRect surface_sBitmapClient; SkRect surface_sBitmapSurface; SkMatrix matrix; surface_sBitmapSurface.set (0, 0, sBitmapSurface.width (), sBitmapSurface.height ()); surface_sBitmapClient.set (0, 0, sBitmapClient.width (), sBitmapClient.height ()); matrix.setRectToRect (surface_sBitmapClient, surface_sBitmapSurface, SkMatrix::kFill_ScaleToFit); canvas.drawBitmapMatrix (sBitmapClient, matrix); } static int prepareSurfaceBitmap (Surface::SurfaceInfo * info) { if (initBitmap (&sBitmapSurface, info->format, info->w, info->h, false) < 0) { return -1; } sBitmapSurface.setPixels (info->bits); return 0; } int AndroidSurface_updateSurface () { static Surface::SurfaceInfo surfaceInfo; if (sSurface == NULL) { return ANDROID_SURFACE_RESULT_JNI_EXCEPTION; } if (!Surface::isValid (sSurface)) { return ANDROID_SURFACE_RESULT_NOT_VALID; } if (sSurface->lock (&surfaceInfo,NULL) < 0) { return ANDROID_SURFACE_RESULT_COULDNT_LOCK; } if (prepareSurfaceBitmap (&surfaceInfo) < 0) { return ANDROID_SURFACE_RESULT_COULDNT_INIT_BITMAP_SURFACE; } doUpdateSurface (); if (sSurface->unlockAndPost () < 0) { return ANDROID_SURFACE_RESULT_COULDNT_UNLOCK_AND_POST; } return ANDROID_SURFACE_RESULT_SUCCESS; } int AndroidSurface_unregister () { __android_log_print (ANDROID_LOG_INFO, TAG, "unregistering video surface"); __android_log_print (ANDROID_LOG_INFO, TAG, "unregistered"); return ANDROID_SURFACE_RESULT_SUCCESS; }
