examples/decoder_tmpl.c

   1 /*
   2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11
  12 /*
  13 @*INTRODUCTION
  14  */
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17 #include <stdarg.h>
  18 #include <string.h>
  19 #define VPX_CODEC_DISABLE_COMPAT 1
  20 #include "vpx/vpx_decoder.h"
  21 #include "vpx/vp8dx.h"
  22 #define interface (vpx_codec_vp8_dx())
  23 @EXTRA_INCLUDES
  24
  25
  26 #define IVF_FILE_HDR_SZ  (32)
  27 #define IVF_FRAME_HDR_SZ (12)
  28
  29 static unsigned int mem_get_le32(const unsigned char *mem) {
  30     return (mem[3] << 24)|(mem[2] << 16)|(mem[1] << 8)|(mem[0]);
  31 }
  32
  33 static void die(const char *fmt, ...) {
  34     va_list ap;
  35
  36     va_start(ap, fmt);
  37     vprintf(fmt, ap);
  38     if(fmt[strlen(fmt)-1] != '\n')
  39         printf("\n");
  40     exit(EXIT_FAILURE);
  41 }
  42
  43 @DIE_CODEC
  44
  45 int main(int argc, char **argv) {
  46     FILE            *infile, *outfile;
  47     vpx_codec_ctx_t  codec;
  48     int              flags = 0, frame_cnt = 0;
  49     unsigned char    file_hdr[IVF_FILE_HDR_SZ];
  50     unsigned char    frame_hdr[IVF_FRAME_HDR_SZ];
  51     unsigned char    frame[256*1024];
  52     vpx_codec_err_t  res;
  53 @@@@EXTRA_VARS
  54
  55     (void)res;
  56     /* Open files */
  57 @@@@USAGE
  58     if(!(infile = fopen(argv[1], "rb")))
  59         die("Failed to open %s for reading", argv[1]);
  60     if(!(outfile = fopen(argv[2], "wb")))
  61         die("Failed to open %s for writing", argv[2]);
  62
  63     /* Read file header */
  64     if(!(fread(file_hdr, 1, IVF_FILE_HDR_SZ, infile) == IVF_FILE_HDR_SZ
  65          && file_hdr[0]=='D' && file_hdr[1]=='K' && file_hdr[2]=='I'
  66          && file_hdr[3]=='F'))
  67         die("%s is not an IVF file.", argv[1]);
  68
  69     printf("Using %s\n",vpx_codec_iface_name(interface));
  70 @@@@DEC_INIT
  71
  72     /* Read each frame */
  73     while(fread(frame_hdr, 1, IVF_FRAME_HDR_SZ, infile) == IVF_FRAME_HDR_SZ) {
  74         int               frame_sz = mem_get_le32(frame_hdr);
  75         vpx_codec_iter_t  iter = NULL;
  76         vpx_image_t      *img;
  77
  78
  79         frame_cnt++;
  80         if(frame_sz > sizeof(frame))
  81             die("Frame %d data too big for example code buffer", frame_sz);
  82         if(fread(frame, 1, frame_sz, infile) != frame_sz)
  83             die("Frame %d failed to read complete frame", frame_cnt);
  84
  85 @@@@@@@@PRE_DECODE
  86 @@@@@@@@DECODE
  87
  88         /* Write decoded data to disk */
  89 @@@@@@@@GET_FRAME
  90             unsigned int plane, y;
  91
  92 @@@@@@@@@@@@PROCESS_DX
  93         }
  94     }
  95     printf("Processed %d frames.\n",frame_cnt);
  96 @@@@DESTROY
  97
  98     fclose(outfile);
  99     fclose(infile);
 100     return EXIT_SUCCESS;
 101 }