x264在Android平台上的编译和使用
x264在Android平台上的编译和使用
x264在Android平台上的移植
gedit ~/.bashrc
将 /opt/android-sdk-linux/tools 添加到 "PATH"环境变量中
将 /opt/android-ndk-r8b 添加到 "PATH"环境变量中
将x264源码包last_x264.tar.bz2下载到~/x264-android目录下，并解压到目录~/x264-android/x264-snapshot-20130808-2245/下
cd ~/x264-android/x264-snapshot-20130808-2245
执行以下配置脚本：
./configure --enable-pic --enable-strip --enable-static --cross-prefix=/opt/android-ndk-r8b/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/arm-linux-androideabi- --sysroot=/opt/android-ndk-r8b/platforms/android-14/arch-arm --host=arm-linux --prefix=./build --extra-cflags="-march=armv7-a -mtune=cortex-a8 -mfloat-abi=softfp -mfpu=neon -D__ARM_ARCH_7__ -D__ARM_ARCH_7A__"
然后：make
最后：在当前目录下生成libx264.a的静态库
注：最好用android-ndk-r8b之前的ndk版本（包括android-ndk-r8b）编译，android-ndk-r8b之后的版本编译x264，最后会报"cannot scan executable section 1 of libx264.a(dct-a.o) for Cortex-A8 erratum because it has no mapping symbols"的警告
x264在android平台上的使用
1、创建工程x264_android
android list targets
android create project --target 1 --name x264_android --path ~/workspace/x264_android --package com.modukaikai.x264 --activity x264Activity
2、copy x264的库和头文件到jni目录
mkdir ~/workspace/x264_android/jni
mkdir ~/workspace/x264_android/jni/x264
cp ~/x264-android/x264-snapshot-20130808-2245/libx264.a ~/workspace/x264_android/jni/x264
cp ~/x264-android/x264-snapshot-20130808-2245/x264.h ~/workspace/x264_android/jni/x264
cp ~/x264-android/x264-snapshot-20130808-2245/x264_config.h ~/workspace/x264_android/jni/x264
3、创建x264encoder类封装x264的调用接口
以下是x264encoder.h(放在jni目录下)
#ifndef x264encoder_h
#define x264encoder_h
extern "C"
{
#include "stdint.h"
#include "x264.h"
enum bitrate_level
{
HIGH_LEVEL = 0,
STANDARD_LEVEL = 1,
MEDIUM_LEVEL = 2,
LOW_LEVEL = 3,
};
class X264Encoder
{
public:
X264Encoder();
~X264Encoder();
bool openX264Encoder();
// long x264EncoderProcess(uint8_t *pSrcData, int srcDataSize, x264_nal_t **nals, int& nalsCount);
long x264EncoderProcess(x264_picture_t *pPicture, x264_nal_t **nals, int& nalsCount);
bool closeX264Encoder();
void setSourceFormat(unsigned int sourcformat);
void setResolution(unsigned int w, unsigned int h);
void setBitrate(unsigned int i_bitrate);
void setFps(unsigned int fps);
void setI_KeyInt_Max(unsigned int i_frame_max);
void setQp_Max(unsigned int qp_max);
void setQp_Min(unsigned int qp_min);
void forceIDRFrame();
void upgradeBitrateLevel();
void declineBitrateLevel();
void setLeastBitrateLevel();
private:
x264_param_t *pParameter;
x264_t *x264EncoderHandle;
// x264_picture_t *pPicture;
x264_picture_t *pOutput;
unsigned int sourceFormat;
// unsigned int i_bitrate;
unsigned int bitratelevel;
unsigned int i_fps;
unsigned int i_keyint_max;
unsigned int width;
unsigned int height;
unsigned int qp_max;
unsigned int qp_min;
unsigned int current_f_rf_constant;
unsigned int userSetting_f_rf_constant;
int64_t frameNo;
bool isForceIDRFrameEnabled;
};
}
#endif
以下是x264encoder.cpp(放在jni目录下)
#include <stdlib.h>
#include <string.h>
#include "x264encoder.h"
// new version for x264 encoder
X264Encoder::X264Encoder()
{
this->bitratelevel = STANDARD_LEVEL;
qp_max = 30;
qp_min = 0;
i_fps = 20;
i_keyint_max = 300;
width = 352;
height = 288;
frameNo = 0;
isForceIDRFrameEnabled = false;
pParameter = NULL;
x264EncoderHandle = NULL;
// pPicture = NULL;
pOutput = NULL;
}
X264Encoder::~X264Encoder()
{
this->closeX264Encoder();
}
void X264Encoder::setSourceFormat(unsigned int sourcformat)
{
this->sourceFormat = sourcformat;
}
void X264Encoder::setResolution(unsigned int w, unsigned int h)
{
width = w;
height = h;
}
void X264Encoder::setBitrate(unsigned int i_bitrate)
{
if (i_bitrate > 0 && i_bitrate <= 64) {
this->bitratelevel = LOW_LEVEL;
}else if(i_bitrate > 64 && i_bitrate <= 128){
this->bitratelevel = MEDIUM_LEVEL;
}else if (i_bitrate > 128 && i_bitrate <= 256) {
this->bitratelevel = STANDARD_LEVEL;
}else if (i_bitrate > 256 && i_bitrate <= 384) {
this->bitratelevel = HIGH_LEVEL;
}else if (i_bitrate > 384 && i_bitrate <= 512) {
this->bitratelevel = HIGH_LEVEL;
}else {
this->bitratelevel = STANDARD_LEVEL;
}
}
void X264Encoder::setFps(unsigned int fps)
{
i_fps = fps;
}
void X264Encoder::setI_KeyInt_Max(unsigned int i_frame_max)
{
i_keyint_max = i_frame_max;
}
void X264Encoder::setQp_Max(unsigned int qp_max)
{
this->qp_max = qp_max;
}
void X264Encoder::setQp_Min(unsigned int qp_min)
{
this->qp_min = qp_min;
}
bool X264Encoder::openX264Encoder()
{
// return false;
this->closeX264Encoder();
if(!pParameter)
{
pParameter = (x264_param_t *)malloc(sizeof(x264_param_t));
if (!pParameter) {
this->closeX264Encoder();
return false;
}
memset(pParameter, 0, sizeof(x264_param_t));
}
int ret = x264_param_default_preset(pParameter, "ultrafast", "zerolatency");
if (ret != 0) {
this->closeX264Encoder();
return false;
}
pParameter->i_level_idc = 30;
pParameter->i_width = width;
pParameter->i_height = height;
pParameter->b_deterministic = 1;
// pParameter->b_sliced_threads = 1;
pParameter->i_threads = 1;
pParameter->i_csp = X264_CSP_I420;//X264_CSP_NV12;//X264_CSP_I420;
pParameter->i_fps_num = i_fps;
pParameter->i_fps_den = 1;
pParameter->i_bframe = 0;
pParameter->i_keyint_max = i_keyint_max;
// pParameter->b_open_gop = 1;
// pParameter->rc.i_bitrate = i_bitrate;
pParameter->rc.i_rc_method = X264_RC_CRF;//X264_RC_CQP;
if (this->bitratelevel == LOW_LEVEL) {
pParameter->rc.f_rf_constant = 32;
}else if(this->bitratelevel == MEDIUM_LEVEL){
pParameter->rc.f_rf_constant = 29;
}else if (this->bitratelevel == STANDARD_LEVEL) {
pParameter->rc.f_rf_constant = 26;
}else if (this->bitratelevel == HIGH_LEVEL) {
pParameter->rc.f_rf_constant = 24;
}else {
pParameter->rc.f_rf_constant = 24;
}
current_f_rf_constant = pParameter->rc.f_rf_constant;
userSetting_f_rf_constant = pParameter->rc.f_rf_constant;
// from huxiaopeng
pParameter->analyse.b_transform_8x8 = 1;
pParameter->rc.f_aq_strength = 1.5;
pParameter->rc.i_aq_mode = 0;
pParameter->rc.f_qcompress = 0.0;
pParameter->rc.f_ip_factor = 0.5;
pParameter->rc.f_rate_tolerance = 0.1;
pParameter->analyse.i_direct_mv_pred = X264_DIRECT_PRED_AUTO;
pParameter->analyse.i_me_method = X264_ME_DIA;
pParameter->analyse.i_me_range = 16;
pParameter->analyse.i_subpel_refine = 2;
// pParameter->analyse.i_noise_reduction = 1;
pParameter->i_slice_max_size = 1200;
// pParameter->i_nal_hrd = X264_NAL_HRD_NONE;
pParameter->b_deblocking_filter = 1;
pParameter->i_deblocking_filter_alphac0 = 4;
pParameter->i_deblocking_filter_beta = 4;
pParameter->rc.b_mb_tree = 0;
pParameter->i_log_level = X264_LOG_NONE;
if(x264_param_apply_profile(pParameter, "baseline"))
{
this->closeX264Encoder();
return false;
}
if (!x264EncoderHandle) {
x264EncoderHandle = x264_encoder_open(pParameter);
if (!x264EncoderHandle) {
this->closeX264Encoder();
return false;
}
}
/*
if (!pPicture) {
pPicture = (x264_picture_t *)malloc(sizeof(x264_picture_t));
if (!pPicture) {
this->closeX264Encoder();
return false;
}
memset(pPicture, 0, sizeof(x264_picture_t));
}
if (x264_picture_alloc(pPicture, X264_CSP_I420, width, height)) {
this->closeX264Encoder();
return false;
}
*/
if (!pOutput) {
pOutput = (x264_picture_t *)malloc(sizeof(x264_picture_t));
if (!pOutput) {
this->closeX264Encoder();
return false;
}
memset(pOutput, 0, sizeof(x264_picture_t));
}
return true;
}
void X264Encoder::forceIDRFrame()
{
isForceIDRFrameEnabled = true;
}
void X264Encoder::upgradeBitrateLevel()
{
/*
if (this->bitratelevel == HIGH_LEVEL) {
return;
}
this->bitratelevel++;
if (this->bitratelevel == LOW_LEVEL) {
pParameter->rc.f_rf_constant = 30;
}else if(this->bitratelevel == MEDIUM_LEVEL){
pParameter->rc.f_rf_constant = 27;
}else if (this->bitratelevel == STANDARD_LEVEL) {
pParameter->rc.f_rf_constant = 24;
}else if (this->bitratelevel == HIGH_LEVEL) {
pParameter->rc.f_rf_constant = 22;
}else {
pParameter->rc.f_rf_constant = 23;
}
*/
if (userSetting_f_rf_constant >= current_f_rf_constant) {
return;
}
pParameter->rc.f_rf_constant--;
current_f_rf_constant = pParameter->rc.f_rf_constant;
x264_encoder_reconfig(x264EncoderHandle, pParameter);
}
void X264Encoder::setLeastBitrateLevel()
{
pParameter->rc.f_rf_constant = 32;
current_f_rf_constant = pParameter->rc.f_rf_constant;
x264_encoder_reconfig(x264EncoderHandle, pParameter);
}
void X264Encoder::declineBitrateLevel()
{
/*
if (this->bitratelevel == LOW_LEVEL) {
return;
}
this->bitratelevel--;
if (this->bitratelevel == LOW_LEVEL) {
pParameter->rc.f_rf_constant = 30;
}else if(this->bitratelevel == MEDIUM_LEVEL){
pParameter->rc.f_rf_constant = 27;
}else if (this->bitratelevel == STANDARD_LEVEL) {
pParameter->rc.f_rf_constant = 24;
}else if (this->bitratelevel == HIGH_LEVEL) {
pParameter->rc.f_rf_constant = 22;
}else {
pParameter->rc.f_rf_constant = 23;
}
*/
if (32 <= current_f_rf_constant) {
return;
}
pParameter->rc.f_rf_constant++;
current_f_rf_constant = pParameter->rc.f_rf_constant;
x264_encoder_reconfig(x264EncoderHandle, pParameter);
}
long X264Encoder::x264EncoderProcess(x264_picture_t *pPicture, x264_nal_t **nals, int& nalsCount)
{
pPicture->i_pts = (int64_t)(frameNo * pParameter->i_fps_den);
pPicture->i_type = X264_TYPE_AUTO;
pPicture->i_qpplus1 = 0;//X264_QP_AUTO;
if (isForceIDRFrameEnabled) {
pPicture->i_type = X264_TYPE_IDR;
isForceIDRFrameEnabled = false;
}
int32_t framesize = -1;
framesize = x264_encoder_encode(x264EncoderHandle, nals, &nalsCount, pPicture, pOutput);
if (framesize>0) {
frameNo++;
}
return framesize;
}
/*
long X264Encoder::x264EncoderProcess(uint8_t *pSrcData, int srcDataSize, x264_nal_t **nals, int& nalsCount)
{
pPicture->img.plane[0] = pSrcData;
pPicture->img.plane[1] = pSrcData + srcDataSize*2/3;
pPicture->img.plane[2] = pSrcData + srcDataSize*2/3 + srcDataSize/6;
pPicture->i_pts = (int64_t)(frameNo * pParameter->i_fps_den);
pPicture->i_type = X264_TYPE_AUTO;
pPicture->i_qpplus1 = X264_QP_AUTO;
if (isForceIDRFrameEnabled) {
pPicture->i_type = X264_TYPE_IDR;
isForceIDRFrameEnabled = false;
}
int32_t framesize = -1;
framesize = x264_encoder_encode(x264EncoderHandle, nals, &nalsCount, pPicture, pOutput);
if (framesize>0) {
frameNo++;
}
return framesize;
}
*/
bool X264Encoder::closeX264Encoder()
{
if (pOutput) {
free(pOutput);
pOutput = NULL;
}
/*
if (pPicture) {
free(pPicture);
pPicture = NULL;
}
*/
if (pParameter) {
free(pParameter);
pParameter = NULL;
}
if (x264EncoderHandle) {
x264_encoder_close(x264EncoderHandle);
x264EncoderHandle = NULL;
}
return true;
}
4、在jni目录下创建测试编码的源文件x264_main.cpp
#include <stdio.h>
#include "x264encoder.h"
int main( int argc, char **argv )
{
X264Encoder x264Encoder;
x264Encoder.setBitrate(512);
x264Encoder.setResolution(640,480);
x264Encoder.setFps(20);
FILE *inputFile = NULL;
FILE *outputFile = NULL;
inputFile = fopen("yuv_640x480.yuv","rb");
outputFile = fopen("h264_640x480.h264","wb");
x264_picture_t inputPicture;
x264_picture_alloc(&inputPicture, X264_CSP_I420, 640, 480);
x264_nal_t *p_nals = NULL;
int nalsCount = 0;
if(x264Encoder.openX264Encoder())
{
for(int j=0; j<20; j++)
{
fread(inputPicture.img.plane[0],1,640*480, inputFile);
fread(inputPicture.img.plane[1],1,640*480/4, inputFile);
fread(inputPicture.img.plane[2],1,640*480/4, inputFile);
x264Encoder.x264EncoderProcess(&inputPicture,&p_nals,nalsCount);
if(p_nals)
{
for(int i=0; i<nalsCount; i++)
{
fwrite(p_nals[i].p_payload, p_nals[i].i_payload, 1, outputFile);
}
}
}
}
fclose(inputFile);
fclose(outputFile);
x264_picture_clean(&inputPicture);
x264Encoder.closeX264Encoder();
return 0;
}
接下来请看第2页精彩内容：
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