达芬奇工具链的建立（工程编译步骤DM6446）
工具链是指的Linux下对程序的编译环境。在这里通过codec_engine_1_02/examples/codecs 下的videnc_copy工程封装CCS下调试好的程序并生成videnc_copy.a64P，再通过codec_engine_1_02/examples/servers/video_copy工程把videnc_copy.a64P封装成all.x64P。最后通过encodedecode工程调用all.x64P。
步骤如下：
1、把ccs下编写好的文件复制到Linux codec_engine_1_02/examples/codecs 下的videnc_copy工程中。
2、修改该工程中的package.bld文件，修改var SRCS = ["videnc_copy","blob","cornerdetection","him","imc","morph","objectrecognition"]; 中括号里只选择工程下的C文件。修改该文件中的
for (var i = 0; i <1 /*Build.targets.length*/; i++) { 选择DSP端只用cgtool来编译。
3、修改codec_engine_1_02/examples下的user.bld,把linux86注掉，选择用C64P，跟第二步中对应。
<!--[if !supportLists]--><!--[endif]--><!--[endif]-->
Build.targets = [
// Linux86,
C64P,
MVArm9
4、修改DSP算法占用的空间
修改server/all.tcf
var mem_ext = [
{
comment: "DDRALGHEAP: off-chip memory for dynamic algmem allocation",
name: "DDRALGHEAP",
base: 0x88000000, // 128MB
len: 0x07A00000, // 122MB
space: "code/data"
},
{
comment: "DDR: off-chip memory for application code and data",
name: "DDR",
base: 0x8FA00000, // 250MB
len: 0x00400000, // 4MB
space: "code/data"
},
{
comment: "DSPLINK: off-chip memory reserved for DSPLINK code and data",
name: "DSPLINKMEM",
base: 0x8FE00000, // 254MB
len: 0x00100000, // 1MB
space: "code/data"
},
{
comment: "RESET_VECTOR: off-chip memory for the reset vector table",
name: "RESET_VECTOR",
base: 0x8FF00000,
len: 0x00000080,
space: "code/data"
},
];
修改为：
var mem_ext = [
{
comment: "DDRALGHEAP: off-chip memory for dynamic algmem allocation",
name: "DDRALGHEAP",
base: 0x88000000, // 128MB
len: 0x07400000, // 122MB
space: "code/data"
},
{
comment: "DDR: off-chip memory for application code and data",
name: "DDR",
base: 0x8F400000, // 250MB
len: 0x00A00000, // 4MB
space: "code/data"
},
{
comment: "DSPLINK: off-chip memory reserved for DSPLINK code and data",
name: "DSPLINKMEM",
base: 0x8FE00000, // 254MB
len: 0x00100000, // 1MB
space: "code/data"
},
{
comment: "RESET_VECTOR: off-chip memory for the reset vector table",
name: "RESET_VECTOR",
base: 0x8FF00000,
len: 0x00000080,
space: "code/data"
},
];
5、修改loadmodules.sh：
insmod dsplinkk.ko ddr_start=0x8f400000 ddr_size=0xA00000
6、在编译codec_engine_1_02/examples/codecs/videnc_copy之前，要修改算法的主程序main函数
void ObjectRecognition(unsigned char* inbuf, int* flag,unsigned char* outbuf, int* kind, float *inIM)。其中输入输出参数是由
XDAS_Int32 VIDENCCOPY_TI_process(IVIDENC_Handle h, XDM_BufDesc *inBufs,XDM_BufDesc *outBufs, IVIDENC_InArgs *inArgs, IVIDENC_OutArgs *outArgs)决定。由于输入输出参数由IVIDENC_InArgs，IVIDENC_OutArgs结构体来决定，所以为了增加输出输入参数，应该修改这两个结构体。为此修改xdais_5_00/packages/ti/xdais/dm中的ividdec.h文件。添加kind和IM[25]。
typedef struct IVIDENC_OutArgs {
XDAS_Int32 size; XDAS_Int32 extendedError;
XDAS_Int32 bytesGenerated;
XDAS_Int32 encodedFrameType;
XDAS_Int32 inputFrameSkip;
XDAS_Int32 kind; /*what's kind of the target*/
float IM[25]; /*return value*/
IVIDEO_BufDesc reconBufs; /**< Reconstruction Frames. */
} IVIDENC_OutArgs;
为了区分输入帧存的性质（从jpeg读取的数据还是ccd采集的数据）增加一个flag作为标志。
typedef struct IVIDENC_InArgs {
XDAS_Int32 size;
XDAS_Int32 flag;//is picture saved on U or captured from CCD
} IVIDENC_InArgs;
7、在videnc_copy中调用算法：在VIDENCCOPY_TI_process函数中添加：ObjectRecognition(inBufs->bufs[curBuf],&(inArgs->flag),outBufs->bufs[curBuf],&(outArgs->kind),(outArgs->IM));
由于使用了#ifdef USE_ACPY3 宏，故而要选择是否使用DMA，为了避免Cache和DMA的冲突，选择不使用DMA。修改codec_engine_1_02/examples/servers/video_copy下的video_copy.cfg文件关闭DMA：
/* we can use DMA in certain codecs! */
VIDENC_COPY.useDMA = false;
8、编译videnc_copy生成videnc_copy.a64P
9、修改server，编译生成all.x64P
10、下面就是编译encodedecode调用all.x64P
•首先修改Encodedecode下的Makefile文件，让encodedecode包含server及codec工程。XDC_PATH = $(CODEC_INSTALL_DIR)/packages;$(CE_INSTALL_DIR)/examples;
$(CE_INSTALL_DIR)/packages;$(LINK_INSTALL_DIR)/packages;
$(XDAIS_INSTALL_DIR)/packages;$(CMEM_INSTALL_DIR)/packages
• 其次为了使用新的算法videnc_copy，要修改encodedecode.cfg文件把H264算法替换为videnc_copy算法：
//var H264ENC =xdc.useModule('ti.sdo.codecs.h264enc.H264ENC');
//var H264DEC = xdc.useModule('ti.sdo.codecs.h264dec.H264DEC');
var VIDDEC_COPY = xdc.useModule('codecs.viddec_copy.VIDDEC_COPY');
var VIDENC_COPY = xdc.useModule('codecs.videnc_copy.VIDENC_COPY');
/* * ======== Engine Configuration ======== */
var Engine = xdc.useModule('ti.sdo.ce.Engine');
/*var vcr = Engine.create("loopback", [
{name: "h264enc", mod: H264ENC, local: false},
{name: "h264dec", mod: H264DEC, local: false},
]);*/
var demoEngine = Engine.create("encodedecode", [
{name: "videnc_copy", mod: VIDENC_COPY, local: false},
{name: "viddec_copy", mod: VIDDEC_COPY, local: false}
]);
//vcr.server = "./loopbackCombo.x64P";
demoEngine.server = "./all.x64P";<!--[if !supportLists]-->
•修改encodedecode工程中创建算法函数
static String decoderName = "viddec_copy";
static String encoderName = "videnc_copy";
static String engineName = "video_copy";
hDecode = VIDDEC_create(hEngine, decoderName, ¶ms);
hEncode = VIDENC_create(hEngine, encoderName, ¶ms);
在工程里用到的是hEncode。
•
修改status = VIDENC_process(hEncode, &inBufDesc,&outBufDesc,&inArgs, &outArgs);<!--[endif]-->的输入输出参数，使之符合封装算法是的函数参数。