Embedded topics: s5pv210-MPEG4 decoding (MFC)

Decoding is easier than encoding. The only worry is that the head data generated by the encoder is used for initialization. That is to say, during encoding, a head data is generated, which is used for decoding.

 

# Include <stdio. h> # include <string. h> # include <stdlib. h> # include <unistd. h> # include ".. /mfc/ssbsipmfcapi. H "# include ".. /mfc/mfcconvert. H "# include" bitmap. H "# include ".. /MM/mmclock. H "# include ".. /Vout. H "int test_dec_mpeg4 () {Vout VO; vo. open (640,480,640,480); ssbsip_mfc_error_code ret = mfc_ret_ OK; // open unsigned int buf_type = cache; void * handle = ssbsipmfcdecopen (); If (handle = NULL) {printf ("Fai Led to open MFC device! \ N "); Return-1;} printf (" = ssbsipmfcdecopen OK \ n "); int maxframesize = 256*1024; /* obtain the input buffer information */void * virinbuf = NULL; void * phyinbuf = NULL; virinbuf = ssbsipmfcdecgetinbuf (handle, & phyinbuf, maxframesize ); printf ("= ssbsipmfcdecgetinbuf OK \ n"); printf ("virinbuf = % 08x, phyinbuf = % 08x \ n", virinbuf, phyinbuf);/* Configuration: you do not need to set * // int configvalue = 2; // the number that you want to delay // ssbsipmfcdecs Etconfig (handle, mfc_dec_setconf_display_delay, // & configvalue);/* read the initialization data to the input buffer, which is generated during encoding */file * fp = fopen ("a00.mpeg4 ", "rb"); int hdr_size = fread (virinbuf, 1, maxframesize, FP); printf ("init data: % d bytes \ n", hdr_size); fclose (FP ); /* initialize */ret = ssbsipmfcdecinit (handle, mpeg4_dec, hdr_size); If (Ret! = Mfc_ret_ OK) {printf ("failed to init MFC! \ N "); Return-1;} else {/* check whether Initialization is successful */timed out; ssbsip_mfc_dec_outbuf_status status = ssbsipmfcdecgetoutbuf (handle, & out); If (Out. img_width <= 0 | out. img_height <= 0) {printf ("bad image size, shocould init again! \ N "); Return-1 ;}/ * Check the output buffer */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) \ 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_ B Ottom_offset); printf ("------------------------------- \ n"); int COUNT = 0; while (count ++ <2) {/* Open the input data: encoded MPEG4 data */Char filename [128]; sprintf (filename, "A % 02d. MPEG4 ", count); printf (" >>> input file: % s \ n ", filename); file * fp = fopen (filename," rb "); int indatalen = fread (virinbuf, 1, maxframesize, FP); fclose (FP);/* decoding */ret = ssbsipmfcdecexe (handle, indatalen); If (Ret! = Mfc_ret_ OK) {printf ("failed decoding (% d) \ n", RET); Return-1 ;}/ * output buffer */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) \ 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); // vo. drawnv12t (Out. yphyaddr, out. cphyaddr); vo. drawnv12t (Out. yviraddr, out. cviraddr); sleep (1); # If 0 // store as 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, "T % 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 // storage is 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 (); vo. close (); // close ssbsipmfcdecclose (handle); Return 0 ;}