FFmpeg的Android平臺移植及使用
阿新 • • 發佈：2019-01-30
參考部落格 http://blog.csdn.net/gobitan/article/details/22750719
原始碼下載：http://download.csdn.net/detail/h291850336/9166229
失敗多了就成功了.....
環境準備：
本人使用win8下安裝vmware workstation
Ubuntu kylin 14.04
android-ndk64-r10-linux-x86_64.tar.bz2
ffmpeg-2.8.tar.bz2
完成安裝配置後
修改ffmpeg-2.2/configure檔案
如果直接按照未修改的配置進行編譯，結果編譯出來的so檔案類似libavcodec.so.55.39.101，版本號位於so之後，Android上似乎無法載入。因此需要按如下修改：
將該檔案中的如下四行：
SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
LIB_INSTALL_EXTRA_CMD='$$(RANLIB)"$(LIBDIR)/$(LIBNAME)"'
SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR)$(SLIBNAME)'
替換為：
SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
LIB_INSTALL_EXTRA_CMD='$$(RANLIB)"$(LIBDIR)/$(LIBNAME)"'
SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
SLIB_INSTALL_LINKS='$(SLIBNAME)'
編寫build_android.sh指令碼檔案
<pre name="code" class="javascript">#!/bin/bash NDK=/home/sunmeng/ffmpeg/android-ndk-r10 SYSROOT=$NDK/platforms/android-L/arch-arm/ TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64 function build_one { ./configure \ --prefix=$PREFIX \ --enable-shared \ --disable-static \ --disable-doc \ --disable-ffserver \ --enable-cross-compile \ --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \ --target-os=linux \ --arch=arm \ --sysroot=$SYSROOT \ --extra-cflags="-Os -fpic $ADDI_CFLAGS" \ --extra-ldflags="$ADDI_LDFLAGS" \ $ADDITIONAL_CONFIGURE_FLAG } CPU=arm PREFIX=$(pwd)/android/$CPU ADDI_CFLAGS="-marm" build_one
這個指令碼檔案有幾個地方需要注意：
(1) NDK,SYSROOT和TOOLCHAIN這三個環境變數一定要換成你自己機器裡的。
(2) 確保cross-prefix變數所指向的路徑是存在的。
給build_android.sh增加可執行許可權： chmod +x build_android.sh
執行build_android.sh ./build_android.sh
- $make
- $make install
執行完後生成
include包含c檔案 lib中包含so檔案
到此ffmpeg編譯結束
建立一個普通的Android工程
- 建立一個新的Android工程FFmpegTest
- 在工程根目錄下建立jni資料夾
- 在jni下建立prebuilt目錄，然後：
(1) 將上面lib檔案編譯成功的7個so檔案放入到該目錄下;
(2) 將include下的所有標頭檔案夾拷貝到該目錄下.
- 建立包含native方法的類，先在src下建立FFmpegNative.java類檔案。主要包括載入so庫檔案和一個native測試方法兩部分，其內容如下：
package com.lmy.ffmpegtest;
public class FFmpegNative {
static {
System.loadLibrary("avcodec-56");
System.loadLibrary("avformat-56");
System.loadLibrary("avdevice-56");
System.loadLibrary("avfilter-5");
System.loadLibrary("avutil-54");
System.loadLibrary("ffmpegutil");
System.loadLibrary("swresample-1");
System.loadLibrary("swscale-3");
}
public native int H264DecoderInit(int width, int height);
public native int H264DecoderRelease();
public native int H264Decode(byte[] in, int insize, byte[] out);
public native int GetFFmpegVersion();
}用javah建立.標頭檔案:
進入bin/classes目錄，執行：javah-jni com.lmy.ffmpegtest..FFmpegNative
生成com_lmy_ffmpegtest_FFmpegNative.h
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class com_lmy_ffmpegtest_FFmpegNative */
#ifndef _Included_com_lmy_ffmpegtest_FFmpegNative
#define _Included_com_lmy_ffmpegtest_FFmpegNative
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: com_lmy_ffmpegtest_FFmpegNative
* Method: H264DecoderInit
* Signature: (II)I
*/
JNIEXPORT jint JNICALL Java_com_lmy_ffmpegtest_FFmpegNative_H264DecoderInit
(JNIEnv *, jobject, jint, jint);
/*
* Class: com_lmy_ffmpegtest_FFmpegNative
* Method: H264DecoderRelease
* Signature: ()I
*/
JNIEXPORT jint JNICALL Java_com_lmy_ffmpegtest_FFmpegNative_H264DecoderRelease
(JNIEnv *, jobject);
/*
* Class: com_lmy_ffmpegtest_FFmpegNative
* Method: H264Decode
* Signature: ([BI[B)I
*/
JNIEXPORT jint JNICALL Java_com_lmy_ffmpegtest_FFmpegNative_H264Decode
(JNIEnv *, jobject, jbyteArray, jint, jbyteArray);
/*
* Class: com_lmy_ffmpegtest_FFmpegNative
* Method: GetFFmpegVersion
* Signature: ()I
*/
JNIEXPORT jint JNICALL Java_com_lmy_ffmpegtest_FFmpegNative_GetFFmpegVersion
(JNIEnv *, jobject);
#ifdef __cplusplus
}
#endif拷貝到jni下
根據生成的檔案編寫com_lmy_ffmpegtest_FFmpegNative.c檔案
<pre name="code" class="cpp">#include <math.h>
#include <libavutil/opt.h>
#include <libavcodec/avcodec.h>
#include <libavutil/channel_layout.h>
#include <libavutil/common.h>
#include <libavutil/imgutils.h>
#include <libavutil/mathematics.h>
#include <libavutil/samplefmt.h>
#include <android/log.h>
#include "com_lmy_ffmpegtest_FFmpegNative.h"
#define LOG_TAG "H264Android.c"
#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG,__VA_ARGS__)
#ifdef __cplusplus
extern "C" {
#endif
//Video
struct AVCodecContext *pAVCodecCtx = NULL;
struct AVCodec *pAVCodec;
struct AVPacket mAVPacket;
struct AVFrame *pAVFrame = NULL;
//Audio
struct AVCodecContext *pAUCodecCtx = NULL;
struct AVCodec *pAUCodec;
struct AVPacket mAUPacket;
struct AVFrame *pAUFrame = NULL;
int iWidth = 0;
int iHeight = 0;
int *colortab = NULL;
int *u_b_tab = NULL;
int *u_g_tab = NULL;
int *v_g_tab = NULL;
int *v_r_tab = NULL;
//short *tmp_pic=NULL;
unsigned int *rgb_2_pix = NULL;
unsigned int *r_2_pix = NULL;
unsigned int *g_2_pix = NULL;
unsigned int *b_2_pix = NULL;
void DeleteYUVTab() {
// av_free(tmp_pic);
av_free(colortab);
av_free(rgb_2_pix);
}
void CreateYUVTab_16() {
int i;
int u, v;
// tmp_pic = (short*)av_malloc(iWidth*iHeight*2); // 緙傛挸鐡� iWidth * iHeight * 16bits
colortab = (int *) av_malloc(4 * 256 * sizeof(int));
u_b_tab = &colortab[0 * 256];
u_g_tab = &colortab[1 * 256];
v_g_tab = &colortab[2 * 256];
v_r_tab = &colortab[3 * 256];
for (i = 0; i < 256; i++) {
u = v = (i - 128);
u_b_tab[i] = (int) (1.772 * u);
u_g_tab[i] = (int) (0.34414 * u);
v_g_tab[i] = (int) (0.71414 * v);
v_r_tab[i] = (int) (1.402 * v);
}
rgb_2_pix = (unsigned int *) av_malloc(3 * 768 * sizeof(unsigned int));
r_2_pix = &rgb_2_pix[0 * 768];
g_2_pix = &rgb_2_pix[1 * 768];
b_2_pix = &rgb_2_pix[2 * 768];
for (i = 0; i < 256; i++) {
r_2_pix[i] = 0;
g_2_pix[i] = 0;
b_2_pix[i] = 0;
}
for (i = 0; i < 256; i++) {
r_2_pix[i + 256] = (i & 0xF8) << 8;
g_2_pix[i + 256] = (i & 0xFC) << 3;
b_2_pix[i + 256] = (i) >> 3;
}
for (i = 0; i < 256; i++) {
r_2_pix[i + 512] = 0xF8 << 8;
g_2_pix[i + 512] = 0xFC << 3;
b_2_pix[i + 512] = 0x1F;
}
r_2_pix += 256;
g_2_pix += 256;
b_2_pix += 256;
}
void DisplayYUV_16(unsigned int *pdst1, unsigned char *y, unsigned char *u,
unsigned char *v, int width, int height, int src_ystride,
int src_uvstride, int dst_ystride) {
int i, j;
int r, g, b, rgb;
int yy, ub, ug, vg, vr;
unsigned char* yoff;
unsigned char* uoff;
unsigned char* voff;
unsigned int* pdst = pdst1;
int width2 = width / 2;
int height2 = height / 2;
if (width2 > iWidth / 2) {
width2 = iWidth / 2;
y += (width - iWidth) / 4 * 2;
u += (width - iWidth) / 4;
v += (width - iWidth) / 4;
}
if (height2 > iHeight)
height2 = iHeight;
for (j = 0; j < height2; j++) {
yoff = y + j * 2 * src_ystride;
uoff = u + j * src_uvstride;
voff = v + j * src_uvstride;
for (i = 0; i < width2; i++) {
yy = *(yoff + (i << 1));
ub = u_b_tab[*(uoff + i)];
ug = u_g_tab[*(uoff + i)];
vg = v_g_tab[*(voff + i)];
vr = v_r_tab[*(voff + i)];
b = yy + ub;
g = yy - ug - vg;
r = yy + vr;
rgb = r_2_pix[r] + g_2_pix[g] + b_2_pix[b];
yy = *(yoff + (i << 1) + 1);
b = yy + ub;
g = yy - ug - vg;
r = yy + vr;
pdst[(j * dst_ystride + i)] = (rgb)
+ ((r_2_pix[r] + g_2_pix[g] + b_2_pix[b]) << 16);
yy = *(yoff + (i << 1) + src_ystride);
b = yy + ub;
g = yy - ug - vg;
r = yy + vr;
rgb = r_2_pix[r] + g_2_pix[g] + b_2_pix[b];
yy = *(yoff + (i << 1) + src_ystride + 1);
b = yy + ub;
g = yy - ug - vg;
r = yy + vr;
pdst[((2 * j + 1) * dst_ystride + i * 2) >> 1] = (rgb)
+ ((r_2_pix[r] + g_2_pix[g] + b_2_pix[b]) << 16);
}
}
}
/*
* Class: FFmpeg
* Method: H264DecoderInit
* Signature: (II)I
*/
JNIEXPORT jint JNICALL Java_com_lmy_ffmpegtest_FFmpegNative_H264DecoderInit(
JNIEnv * env, jobject jobj, jint width, jint height) {
iWidth = width;
iHeight = height;
if (pAVCodecCtx != NULL) {
avcodec_close(pAVCodecCtx);
pAVCodecCtx = NULL;
}
if (pAVFrame != NULL) {
av_free(pAVFrame);
pAVFrame = NULL;
}
// Register all formats and codecs
av_register_all();
LOGD("avcodec register success");
//CODEC_ID_PCM_ALAW
pAVCodec = avcodec_find_decoder(AV_CODEC_ID_H264);
if (pAVCodec == NULL)
return -1;
//init AVCodecContext
pAVCodecCtx = avcodec_alloc_context3(pAVCodec);
if (pAVCodecCtx == NULL)
return -1;
/* we do not send complete frames */
if (pAVCodec->capabilities & CODEC_CAP_TRUNCATED)
pAVCodecCtx->flags |= CODEC_FLAG_TRUNCATED; /* we do not send complete frames */
/* open it */
if (avcodec_open2(pAVCodecCtx, pAVCodec, NULL) < 0)
return avcodec_open2(pAVCodecCtx, pAVCodec, NULL);
av_init_packet(&mAVPacket);
pAVFrame = av_frame_alloc();
if (pAVFrame == NULL)
return -1;
//pImageConvertCtx = sws_getContext(pAVCodecCtx->width, pAVCodecCtx->height, PIX_FMT_YUV420P, pAVCodecCtx->width, pAVCodecCtx->height,PIX_FMT_RGB565LE, SWS_BICUBIC, NULL, NULL, NULL);
//LOGD("sws_getContext return =%d",pImageConvertCtx);
LOGD("avcodec context success");
CreateYUVTab_16();
LOGD("create yuv table success");
return 1;
}
/*
* Class: com_android_concox_FFmpeg
* Method: H264DecoderRelease
* Signature: ()I
*/
JNIEXPORT jint JNICALL Java_com_lmy_ffmpegtest_FFmpegNative_H264DecoderRelease(
JNIEnv * env, jobject jobj) {
if (pAVCodecCtx != NULL) {
avcodec_close(pAVCodecCtx);
pAVCodecCtx = NULL;
}
if (pAVFrame != NULL) {
av_free(pAVFrame);
pAVFrame = NULL;
}
DeleteYUVTab();
return 1;
}
/*
* Class: com_android_concox_FFmpeg
* Method: H264Decode
* Signature: ([BI[B)I
*/
JNIEXPORT jint JNICALL Java_com_lmy_ffmpegtest_FFmpegNative_H264Decode(JNIEnv* env,
jobject thiz, jbyteArray in, jint inbuf_size, jbyteArray out) {
int i;
jbyte * inbuf = (jbyte*) (*env)->GetByteArrayElements(env, in, 0);
jbyte * Picture = (jbyte*) (*env)->GetByteArrayElements(env, out, 0);
av_frame_unref(pAVFrame);
mAVPacket.data = inbuf;
mAVPacket.size = inbuf_size;
LOGD("mAVPacket.size:%d\n ", mAVPacket.size);
int len = -1, got_picture = 0;
len = avcodec_decode_video2(pAVCodecCtx, pAVFrame, &got_picture,
&mAVPacket);
LOGD("len:%d\n", len);
if (len < 0) {
LOGD("len=-1,decode error");
return len;
}
if (got_picture > 0) {
LOGD("GOT PICTURE");
/*pImageConvertCtx = sws_getContext (pAVCodecCtx->width,
pAVCodecCtx->height, pAVCodecCtx->pix_fmt,
pAVCodecCtx->width, pAVCodecCtx->height,
PIX_FMT_RGB565LE, SWS_BICUBIC, NULL, NULL, NULL);
sws_scale (pImageConvertCtx, pAVFrame->data, pAVFrame->linesize,0, pAVCodecCtx->height, pAVFrame->data, pAVFrame->linesize);
*/
DisplayYUV_16((int*) Picture, pAVFrame->data[0], pAVFrame->data[1],
pAVFrame->data[2], pAVCodecCtx->width, pAVCodecCtx->height,
pAVFrame->linesize[0], pAVFrame->linesize[1], iWidth);
} else
LOGD("GOT PICTURE fail");
(*env)->ReleaseByteArrayElements(env, in, inbuf, 0);
(*env)->ReleaseByteArrayElements(env, out, Picture, 0);
return len;
}
/*
* Class: com_android_concox_FFmpeg
* Method: GetFFmpegVersion
* Signature: ()I
*/
JNIEXPORT jint JNICALL Java_com_lmy_ffmpegtest_FFmpegNative_GetFFmpegVersion(
JNIEnv * env, jobject jobj) {
return avcodec_version();
}
#ifdef __cplusplus
}
#endif
#endif
<pre name="code" class="cpp">#include <math.h>
#include <libavutil/opt.h>
#include <libavcodec/avcodec.h>
#include <libavutil/channel_layout.h>
#include <libavutil/common.h>
#include <libavutil/imgutils.h>
#include <libavutil/mathematics.h>
#include <libavutil/samplefmt.h>
#include <android/log.h>
#include "com_lmy_ffmpegtest_FFmpegNative.h"
#define LOG_TAG "H264Android.c"
#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG,__VA_ARGS__)
#ifdef __cplusplus
extern "C" {
#endif
//Video
struct AVCodecContext *pAVCodecCtx = NULL;
struct AVCodec *pAVCodec;
struct AVPacket mAVPacket;
struct AVFrame *pAVFrame = NULL;
//Audio
struct AVCodecContext *pAUCodecCtx = NULL;
struct AVCodec *pAUCodec;
struct AVPacket mAUPacket;
struct AVFrame *pAUFrame = NULL;
int iWidth = 0;
int iHeight = 0;
int *colortab = NULL;
int *u_b_tab = NULL;
int *u_g_tab = NULL;
int *v_g_tab = NULL;
int *v_r_tab = NULL;
//short *tmp_pic=NULL;
unsigned int *rgb_2_pix = NULL;
unsigned int *r_2_pix = NULL;
unsigned int *g_2_pix = NULL;
unsigned int *b_2_pix = NULL;
void DeleteYUVTab() {
// av_free(tmp_pic);
av_free(colortab);
av_free(rgb_2_pix);
}
void CreateYUVTab_16() {
int i;
int u, v;
// tmp_pic = (short*)av_malloc(iWidth*iHeight*2); // 緙傛挸鐡� iWidth * iHeight * 16bits
colortab = (int *) av_malloc(4 * 256 * sizeof(int));
u_b_tab = &colortab[0 * 256];
u_g_tab = &colortab[1 * 256];
v_g_tab = &colortab[2 * 256];
v_r_tab = &colortab[3 * 256];
for (i = 0; i < 256; i++) {
u = v = (i - 128);
u_b_tab[i] = (int) (1.772 * u);
u_g_tab[i] = (int) (0.34414 * u);
v_g_tab[i] = (int) (0.71414 * v);
v_r_tab[i] = (int) (1.402 * v);
}
rgb_2_pix = (unsigned int *) av_malloc(3 * 768 * sizeof(unsigned int));
r_2_pix = &rgb_2_pix[0 * 768];
g_2_pix = &rgb_2_pix[1 * 768];
b_2_pix = &rgb_2_pix[2 * 768];
for (i = 0; i < 256; i++) {
r_2_pix[i] = 0;
g_2_pix[i] = 0;
b_2_pix[i] = 0;
}
for (i = 0; i < 256; i++) {
r_2_pix[i + 256] = (i & 0xF8) << 8;
g_2_pix[i + 256] = (i & 0xFC) << 3;
b_2_pix[i + 256] = (i) >> 3;
}
for (i = 0; i < 256; i++) {
r_2_pix[i + 512] = 0xF8 << 8;
g_2_pix[i + 512] = 0xFC << 3;
b_2_pix[i + 512] = 0x1F;
}
r_2_pix += 256;
g_2_pix += 256;
b_2_pix += 256;
}
void DisplayYUV_16(unsigned int *pdst1, unsigned char *y, unsigned char *u,
unsigned char *v, int width, int height, int src_ystride,
int src_uvstride, int dst_ystride) {
int i, j;
int r, g, b, rgb;
int yy, ub, ug, vg, vr;
unsigned char* yoff;
unsigned char* uoff;
unsigned char* voff;
unsigned int* pdst = pdst1;
int width2 = width / 2;
int height2 = height / 2;
if (width2 > iWidth / 2) {
width2 = iWidth / 2;
y += (width - iWidth) / 4 * 2;
u += (width - iWidth) / 4;
v += (width - iWidth) / 4;
}
if (height2 > iHeight)
height2 = iHeight;
for (j = 0; j < height2; j++) {
yoff = y + j * 2 * src_ystride;
uoff = u + j * src_uvstride;
voff = v + j * src_uvstride;
for (i = 0; i < width2; i++) {
yy = *(yoff + (i << 1));
ub = u_b_tab[*(uoff + i)];
ug = u_g_tab[*(uoff + i)];
vg = v_g_tab[*(voff + i)];
vr = v_r_tab[*(voff + i)];
b = yy + ub;
g = yy - ug - vg;
r = yy + vr;
rgb = r_2_pix[r] + g_2_pix[g] + b_2_pix[b];
yy = *(yoff + (i << 1) + 1);
b = yy + ub;
g = yy - ug - vg;
r = yy + vr;
pdst[(j * dst_ystride + i)] = (rgb)
+ ((r_2_pix[r] + g_2_pix[g] + b_2_pix[b]) << 16);
yy = *(yoff + (i << 1) + src_ystride);
b = yy + ub;
g = yy - ug - vg;
r = yy + vr;
rgb = r_2_pix[r] + g_2_pix[g] + b_2_pix[b];
yy = *(yoff + (i << 1) + src_ystride + 1);
b = yy + ub;
g = yy - ug - vg;
r = yy + vr;
pdst[((2 * j + 1) * dst_ystride + i * 2) >> 1] = (rgb)
+ ((r_2_pix[r] + g_2_pix[g] + b_2_pix[b]) << 16);
}
}
}
/*
* Class: FFmpeg
* Method: H264DecoderInit
* Signature: (II)I
*/
JNIEXPORT jint JNICALL Java_com_lmy_ffmpegtest_FFmpegNative_H264DecoderInit(
JNIEnv * env, jobject jobj, jint width, jint height) {
iWidth = width;
iHeight = height;
if (pAVCodecCtx != NULL) {
avcodec_close(pAVCodecCtx);
pAVCodecCtx = NULL;
}
if (pAVFrame != NULL) {
av_free(pAVFrame);
pAVFrame = NULL;
}
// Register all formats and codecs
av_register_all();
LOGD("avcodec register success");
//CODEC_ID_PCM_ALAW
pAVCodec = avcodec_find_decoder(AV_CODEC_ID_H264);
if (pAVCodec == NULL)
return -1;
//init AVCodecContext
pAVCodecCtx = avcodec_alloc_context3(pAVCodec);
if (pAVCodecCtx == NULL)
return -1;
/* we do not send complete frames */
if (pAVCodec->capabilities & CODEC_CAP_TRUNCATED)
pAVCodecCtx->flags |= CODEC_FLAG_TRUNCATED; /* we do not send complete frames */
/* open it */
if (avcodec_open2(pAVCodecCtx, pAVCodec, NULL) < 0)
return avcodec_open2(pAVCodecCtx, pAVCodec, NULL);
av_init_packet(&mAVPacket);
pAVFrame = av_frame_alloc();
if (pAVFrame == NULL)
return -1;
//pImageConvertCtx = sws_getContext(pAVCodecCtx->width, pAVCodecCtx->height, PIX_FMT_YUV420P, pAVCodecCtx->width, pAVCodecCtx->height,PIX_FMT_RGB565LE, SWS_BICUBIC, NULL, NULL, NULL);
//LOGD("sws_getContext return =%d",pImageConvertCtx);
LOGD("avcodec context success");
CreateYUVTab_16();
LOGD("create yuv table success");
return 1;
}
/*
* Class: com_android_concox_FFmpeg
* Method: H264DecoderRelease
* Signature: ()I
*/
JNIEXPORT jint JNICALL Java_com_lmy_ffmpegtest_FFmpegNative_H264DecoderRelease(
JNIEnv * env, jobject jobj) {
if (pAVCodecCtx != NULL) {
avcodec_close(pAVCodecCtx);
pAVCodecCtx = NULL;
}
if (pAVFrame != NULL) {
av_free(pAVFrame);
pAVFrame = NULL;
}
DeleteYUVTab();
return 1;
}
/*
* Class: com_android_concox_FFmpeg
* Method: H264Decode
* Signature: ([BI[B)I
*/
JNIEXPORT jint JNICALL Java_com_lmy_ffmpegtest_FFmpegNative_H264Decode(JNIEnv* env,
jobject thiz, jbyteArray in, jint inbuf_size, jbyteArray out) {
int i;
jbyte * inbuf = (jbyte*) (*env)->GetByteArrayElements(env, in, 0);
jbyte * Picture = (jbyte*) (*env)->GetByteArrayElements(env, out, 0);
av_frame_unref(pAVFrame);
mAVPacket.data = inbuf;
mAVPacket.size = inbuf_size;
LOGD("mAVPacket.size:%d\n ", mAVPacket.size);
int len = -1, got_picture = 0;
len = avcodec_decode_video2(pAVCodecCtx, pAVFrame, &got_picture,
&mAVPacket);
LOGD("len:%d\n", len);
if (len < 0) {
LOGD("len=-1,decode error");
return len;
}
if (got_picture > 0) {
LOGD("GOT PICTURE");
/*pImageConvertCtx = sws_getContext (pAVCodecCtx->width,
pAVCodecCtx->height, pAVCodecCtx->pix_fmt,
pAVCodecCtx->width, pAVCodecCtx->height,
PIX_FMT_RGB565LE, SWS_BICUBIC, NULL, NULL, NULL);
sws_scale (pImageConvertCtx, pAVFrame->data, pAVFrame->linesize,0, pAVCodecCtx->height, pAVFrame->data, pAVFrame->linesize);
*/
DisplayYUV_16((int*) Picture, pAVFrame->data[0], pAVFrame->data[1],
pAVFrame->data[2], pAVCodecCtx->width, pAVCodecCtx->height,
pAVFrame->linesize[0], pAVFrame->linesize[1], iWidth);
} else
LOGD("GOT PICTURE fail");
(*env)->ReleaseByteArrayElements(env, in, inbuf, 0);
(*env)->ReleaseByteArrayElements(env, out, Picture, 0);
return len;
}
/*
* Class: com_android_concox_FFmpeg
* Method: GetFFmpegVersion
* Signature: ()I
*/
JNIEXPORT jint JNICALL Java_com_lmy_ffmpegtest_FFmpegNative_GetFFmpegVersion(
JNIEnv * env, jobject jobj) {
return avcodec_version();
}
#ifdef __cplusplus
}
#endif
#endif 編寫Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := avutil-54-prebuilt
LOCAL_SRC_FILES := prebuilt/libavutil-54.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := avswresample-1-prebuilt
LOCAL_SRC_FILES := prebuilt/libswresample-1.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := swscale-3-prebuilt
LOCAL_SRC_FILES := prebuilt/libswscale-3.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := avcodec-56-prebuilt
LOCAL_SRC_FILES := prebuilt/libavcodec-56.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := avdevice-56-prebuilt
LOCAL_SRC_FILES := prebuilt/libavdevice-56.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := avformat-56-prebuilt
LOCAL_SRC_FILES := prebuilt/libavformat-56.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := avfilter-5-prebuilt
LOCAL_SRC_FILES := prebuilt/libavfilter-5.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := libffmpegutil
LOCAL_SRC_FILES := com_lmy_ffmpegtest_FFmpegNative.c
LOCAL_LDLIBS := -llog -ljnigraphics -lz -landroid -lm -pthread
LOCAL_SHARED_LIBRARIES := avcodec-56-prebuilt avdevice-56-prebuilt avfilter-5-prebuilt avformat-56-prebuilt avutil-54-prebuilt avswresample-1-prebuilt swscale-3-prebuilt
include $(BUILD_SHARED_LIBRARY)編寫Application.mk : APP_PLATFORM := android-9
此處省略回引起 dlopen failed: cannot locate symbol "atof" referenced by "libavformat-56.so類似的錯誤
開啟cmd命令列，進入工程目錄目，執行如下命令： ndk-build
測試程式碼：
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FFmpegNative s = new FFmpegNative();
int i = s.GetFFmpegVersion();
((TextView)findViewById(R.id.text)).setText(i + "");
}
}
專案結構：
程式碼下載路徑：http://download.csdn.net/detail/h291850336/9166229