嵌入式專題： S5PV210 - H264硬體解碼（MFC)

標籤：資料   os   width   io   line   rgb   

先說一下編碼的例子好像找不到了，只提供一下解碼的例子吧。淡疼的三星要是能以YUV420P為基本映像格式就好了，這樣結合FFmpeg來開發，各種應用都比較方法。再設計一個RGB/YUV硬體轉碼單元，最好。

 

#include <stdio.h>#include <string.h>#include <stdlib.h>#include <unistd.h>#include "../mfc/SsbSipMfcApi.h"#include "../mfc/MfcConvert.h"int test_dec_h264(){SSBSIP_MFC_ERROR_CODE ret = MFC_RET_OK;// 開啟unsigned int buf_type = CACHE;void* handle = SsbSipMfcDecOpen();if(handle == NULL){printf("failed to open mfc device!\n");return -1;}printf("== SsbSipMfcDecOpen OK \n");int maxFrameSize = 256 * 1024;/* 得到 輸入緩衝區資訊 */void* virInBuf = NULL;void* phyInBuf = NULL;virInBuf = SsbSipMfcDecGetInBuf(handle, &phyInBuf, maxFrameSize);printf("== SsbSipMfcDecGetInBuf OK \n");printf("virInBuf=%08X, phyInBuf=%08X \n", virInBuf, phyInBuf);/* 配置: 暫不需要設定 */// int configValue = 2; // the number that you want to delay// SsbSipMfcDecSetConfig(handle, MFC_DEC_SETCONF_DISPLAY_DELAY,// &configValue);/* 讀取初始化資料到輸入緩衝區，此資料在編碼的時候產生 */FILE* fp = fopen("h264/hdr.h264", "rb");int hdr_size = fread(virInBuf, 1, maxFrameSize, fp);printf("init data: %d bytes \n", hdr_size);fclose(fp);/* 初始化 */ret = SsbSipMfcDecInit(handle, H264_DEC, hdr_size);if(ret != MFC_RET_OK){printf("failed to init mfc!\n");return -1;}else{/* 檢查是否初始化成功 */SSBSIP_MFC_DEC_OUTPUT_INFO out;SSBSIP_MFC_DEC_OUTBUF_STATUS status = SsbSipMfcDecGetOutBuf(handle, &out);if(out.img_width <= 0 || out.img_height <= 0){printf("bad image size, should init again!\n");return -1;}}/* 檢查輸出緩衝區 */printf("== SsbSipMfcDecInit OK \n");SSBSIP_MFC_DEC_OUTPUT_INFO out;SSBSIP_MFC_DEC_OUTBUF_STATUS status;status = SsbSipMfcDecGetOutBuf(handle, &out);printf("output: status = %d , image(%dx%d), buf(%dx%d), crop(%d,%d,%d,%d) \n", status, out.img_width, out.img_height,out.buf_width, out.buf_height,out.crop_left_offset, out.crop_top_offset, out.crop_right_offset, out.crop_bottom_offset);printf("-------------------------------\n");int count = 0;while(count ++ < 100){/* 開啟輸入資料：已經編碼的mpeg4資料 */char filename[128];sprintf(filename, "h264/%08d.h264", count);printf(">>> input file: %s \n", filename);FILE* fp = fopen(filename, "rb");int inDataLen = fread(virInBuf, 1, maxFrameSize, fp);fclose(fp);/* 解碼 */ret = SsbSipMfcDecExe(handle, inDataLen);if(ret != MFC_RET_OK){printf("failed decoding (%d) \n", ret);return  -1;}/* 輸出緩衝區 */SSBSIP_MFC_DEC_OUTPUT_INFO out;SSBSIP_MFC_DEC_OUTBUF_STATUS status;status = SsbSipMfcDecGetOutBuf(handle, &out);printf("<<< output: status = %d , image(%dx%d), buf(%dx%d), crop(%d,%d,%d,%d) \n", status, out.img_width, out.img_height,out.buf_width, out.buf_height,out.crop_left_offset, out.crop_top_offset, out.crop_right_offset, out.crop_bottom_offset);if(status == MFC_GETOUTBUF_DISPLAY_DECODING || status == MFC_GETOUTBUF_DISPLAY_ONLY){printf("y_addr = %08X, cbcr_addr = %08X \n", out.YVirAddr, out.CVirAddr);#if 1// 儲存為NV12-Tif(1){//vo.DrawNV12T(out.YPhyAddr, out.CPhyAddr);int y_size = out.buf_width * out.buf_height;int uv_size = y_size / 2;char yuvname[128];sprintf(yuvname, "nv12t/ttt%02d.nv12t", count);FILE* fp_y = fopen(yuvname, "wb");fwrite(out.YVirAddr, 1, y_size, fp_y);fwrite(out.CVirAddr, 1, uv_size, fp_y);fclose(fp_y);}#endif#if 0// 儲存為YUV420Pif(1){// tile -> linearint y_size = out.buf_width * out.buf_height;int uv_size = y_size / 2;unsigned char* y = new unsigned char[y_size]; unsigned char* uv = new unsigned char[uv_size];printf("y buff: %08X, %d\n", y, y_size);//tile_to_linenar_y((char*)out.YVirAddr, (char*)y, out.buf_width, out.buf_height);Y_tile_to_linear_4x2(y, (unsigned char*)out.YVirAddr, out.buf_width, out.buf_height);CbCr_tile_to_linear_4x2(uv, (unsigned char*)out.CVirAddr, out.buf_width, out.buf_height);// tile_to_linear_64x32_4x2_neon(y, (unsigned char*)out.YVirAddr, out.buf_width, out.buf_height);// tile_to_linear_64x32_4x2_uv_neon(uv, (unsigned char*)out.CVirAddr, out.buf_width, out.buf_height/2);//nv_2_uv((char*)out.CVirAddr, (char*)uv , (char*)uv + y_size/4, out.buf_width, out.buf_height);char yuvname[128];sprintf(yuvname, "c%02d.yuv420", count);FILE* fp_y = fopen(yuvname, "wb");fwrite(y, 1, y_size, fp_y);fwrite(uv, 1, uv_size, fp_y);fclose(fp_y);//printf("haha\n");delete [] y;delete [] uv;}#endif#if 0if(0){// tile to rgbint width = out.buf_width;int height = out.buf_height;Bitmap bmp;bmp.Create(width, height, 24);tile64x32_to_rgb24((unsigned char*)out.YVirAddr, (unsigned char*)out.CVirAddr,bmp.m_Data,width, height);printf("write to bmp file \n");char outname[128];sprintf(outname, "%s.bmp", filename);bmp.SaveToFile(outname);}#endif}}getchar();// 關閉SsbSipMfcDecClose(handle);return 0;}