嵌入式专题： S5PV210 - MPEG4编码

我想说不同的平台，如tiny210和x210。它们的头文件是有稍微区别的。

我这个是x210下的代码。但都须要注意的是NV12T与NV12的问题，默认要求输入的图片是NV12T，经过调整之后，能够同意用NV12。

即便如此。NV12格式的图片也不好拿到啊。

#include

#include

#include

#include

#include '../mfc/SsbSipMfcApi.h'

#include '../mfc/MfcConvert.h'

#include '../mm/MMClock.h'

int test_enc_mpeg4()

{

MMClock clock;

clock.Adjust(1000);

SSBSIP_MFC_ERROR_CODE ret = MFC_RET_OK;

// 打开

unsigned int buf_type = CACHE;

void* handle = SsbSipMfcEncOpen();

if(handle == NULL)

{

printf('failed to open mfc device!n');

return -1;

}

printf('== SsbSipMfcDecOpen OK n');

int img_width = 640;

int img_height = 480;

// 初始化

SSBSIP_MFC_ENC_MPEG4_PARAM param;

memset(¶m, 0, sizeof(param));

param.codecType = MPEG4_ENC;

param.SourceWidth = img_width;

param.SourceHeight = img_height;

param.FrameMap = NV12_LINEAR; // 使用linear

param.IDRPeriod = 20;  // 能够大于3吗？

param.SliceMode = 0;

param.SliceArgument = 1;

param.RandomIntraMBRefresh = 0; // ?

// 不使用frame based rate control

param.EnableFRMRateControl = 1;

param.TimeIncreamentRes = 1000;

param.VopTimeIncreament = 40;

param.Bitrate = 4000000;

param.FrameQp = 1;

param.FrameQp_P = 1;

param.FrameQp_B = 1;

param.QSCodeMax = 45;

param.QSCodeMin = 20;

param.CBRPeriodRf = 2;

// 不使用自己定义padding

param.PadControlOn = 0;

param.LumaPadVal = 0;

param.CbPadVal = 0;

param.CrPadVal = 0;

param.ProfileIDC = 66;

param.LevelIDC = 22;

param.NumberBFrames = 0;

param.DisableQpelME = 0;

if(SsbSipMfcEncInit(handle, ¶m) != MFC_RET_OK)

{

printf('failed to init encoder !n');

return -1;

}

/* 得到输入缓冲区地址 */

SSBSIP_MFC_ENC_INPUT_INFO inbuf;

if(SsbSipMfcEncGetInBuf (handle, &inbuf) != MFC_RET_OK)

{

printf('failed to get in buf !n');

return 0;

}

printf('in buf: Y (addr=%08X, size=%d), CbCr (addr=%08X, size=%d) n'

, inbuf.YVirAddr, inbuf.YSize

, inbuf.CVirAddr, inbuf.CSize

);

/* 得到header */

SSBSIP_MFC_ENC_OUTPUT_INFO outbuf;

ret = SsbSipMfcEncGetOutBuf (handle, &outbuf);

if(ret != MFC_RET_OK)

{

printf('failed to get output (%d) n', ret);

return -1;

}

printf('saving header: %d bytes n', outbuf.headerSize);

if(1)

{

FILE* fp = fopen('a00.mpeg4', 'wb');

fwrite(outbuf.StrmVirAddr, 1, outbuf.headerSize, fp);

fclose(fp);

}

int y_size = img_width * img_height;

int c_size = y_size / 2;

/* 读取图像 */

FILE* fp = fopen('k00.nv12', 'rb');

int n1 = fread(inbuf.YVirAddr, 1, y_size, fp);

int n2 = fread(inbuf.CVirAddr, 1, c_size, fp);

printf('read bytes: n1=%d, n2=%d n', n1, n2);

int count = 0;

while(count ++ < 3)

{

printf('... times: %d , now %d ...n', count, (int) clock.PtsTime());

/* 编码 */

ret = SsbSipMfcEncExe(handle);

if(ret != MFC_RET_OK)

{

printf('failed encoding (%d) n', ret);

return -1;

}

/* 输出结果 */

SSBSIP_MFC_ENC_OUTPUT_INFO outbuf;

ret = SsbSipMfcEncGetOutBuf (handle, &outbuf);

if(ret != MFC_RET_OK)

{

printf('failed to get output (%d) n', ret);

return -1;

}

printf('output: frame type=%d, size=%d, header size=%d n'

, outbuf.frameType

, outbuf.dataSize

, outbuf.headerSize);

/* 保存成文件*/

char filename[128];

sprintf(filename, 'a%02d.mpeg4', count);

FILE* fp = fopen(filename, 'wb');

fwrite(outbuf.StrmVirAddr, 1, outbuf.dataSize, fp);

fclose(fp);

}

SsbSipMfcEncClose(handle);

return 0;

}