examples/encoder_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_encoder.h"
  21 #include "vpx/vp8cx.h"
  22 #define interface (vpx_codec_vp8_cx())
  23 #define fourcc    0x30385056
  24 @EXTRA_INCLUDES
  25
  26 #define IVF_FILE_HDR_SZ  (32)
  27 #define IVF_FRAME_HDR_SZ (12)
  28
  29 static void mem_put_le16(char *mem, unsigned int val) {
  30     mem[0] = val;
  31     mem[1] = val>>8;
  32 }
  33
  34 static void mem_put_le32(char *mem, unsigned int val) {
  35     mem[0] = val;
  36     mem[1] = val>>8;
  37     mem[2] = val>>16;
  38     mem[3] = val>>24;
  39 }
  40
  41 static void die(const char *fmt, ...) {
  42     va_list ap;
  43
  44     va_start(ap, fmt);
  45     vprintf(fmt, ap);
  46     if(fmt[strlen(fmt)-1] != '\n')
  47         printf("\n");
  48     exit(EXIT_FAILURE);
  49 }
  50
  51 @DIE_CODEC
  52
  53 static int read_frame(FILE *f, vpx_image_t *img) {
  54     size_t nbytes, to_read;
  55     int    res = 1;
  56
  57     to_read = img->w*img->h*3/2;
  58     nbytes = fread(img->planes[0], 1, to_read, f);
  59     if(nbytes != to_read) {
  60         res = 0;
  61         if(nbytes > 0)
  62             printf("Warning: Read partial frame. Check your width & height!\n");
  63     }
  64     return res;
  65 }
  66
  67 static void write_ivf_file_header(FILE *outfile,
  68                                   const vpx_codec_enc_cfg_t *cfg,
  69                                   int frame_cnt) {
  70     char header[32];
  71
  72     if(cfg->g_pass != VPX_RC_ONE_PASS && cfg->g_pass != VPX_RC_LAST_PASS)
  73         return;
  74     header[0] = 'D';
  75     header[1] = 'K';
  76     header[2] = 'I';
  77     header[3] = 'F';
  78     mem_put_le16(header+4,  0);                   /* version */
  79     mem_put_le16(header+6,  32);                  /* headersize */
  80     mem_put_le32(header+8,  fourcc);              /* headersize */
  81     mem_put_le16(header+12, cfg->g_w);            /* width */
  82     mem_put_le16(header+14, cfg->g_h);            /* height */
  83     mem_put_le32(header+16, cfg->g_timebase.den); /* rate */
  84     mem_put_le32(header+20, cfg->g_timebase.num); /* scale */
  85     mem_put_le32(header+24, frame_cnt);           /* length */
  86     mem_put_le32(header+28, 0);                   /* unused */
  87
  88     if(fwrite(header, 1, 32, outfile));
  89 }
  90
  91
  92 static void write_ivf_frame_header(FILE *outfile,
  93                                    const vpx_codec_cx_pkt_t *pkt)
  94 {
  95     char             header[12];
  96     vpx_codec_pts_t  pts;
  97
  98     if(pkt->kind != VPX_CODEC_CX_FRAME_PKT)
  99         return;
 100
 101     pts = pkt->data.frame.pts;
 102     mem_put_le32(header, pkt->data.frame.sz);
 103     mem_put_le32(header+4, pts&0xFFFFFFFF);
 104     mem_put_le32(header+8, pts >> 32);
 105
 106     if(fwrite(header, 1, 12, outfile));
 107 }
 108
 109 int main(int argc, char **argv) {
 110     FILE                *infile, *outfile;
 111     vpx_codec_ctx_t      codec;
 112     vpx_codec_enc_cfg_t  cfg;
 113     int                  frame_cnt = 0;
 114     vpx_image_t          raw;
 115     vpx_codec_err_t      res;
 116     long                 width;
 117     long                 height;
 118     int                  frame_avail;
 119     int                  got_data;
 120     int                  flags = 0;
 121 @@@@TWOPASS_VARS
 122
 123     /* Open files */
 124 @@@@USAGE
 125     width = strtol(argv[1], NULL, 0);
 126     height = strtol(argv[2], NULL, 0);
 127     if(width < 16 || width%2 || height <16 || height%2)
 128         die("Invalid resolution: %ldx%ld", width, height);
 129     if(!vpx_img_alloc(&raw, VPX_IMG_FMT_I420, width, height, 1))
 130         die("Faile to allocate image", width, height);
 131     if(!(outfile = fopen(argv[4], "wb")))
 132         die("Failed to open %s for writing", argv[4]);
 133
 134     printf("Using %s\n",vpx_codec_iface_name(interface));
 135
 136 @@@@ENC_DEF_CFG
 137
 138 @@@@ENC_SET_CFG
 139 @@@@ENC_SET_CFG2
 140
 141     write_ivf_file_header(outfile, &cfg, 0);
 142
 143 @@@@TWOPASS_LOOP_BEGIN
 144
 145         /* Open input file for this encoding pass */
 146         if(!(infile = fopen(argv[3], "rb")))
 147             die("Failed to open %s for reading", argv[3]);
 148
 149 @@@@@@@@ENC_INIT
 150
 151         frame_avail = 1;
 152         got_data = 0;
 153         while(frame_avail || got_data) {
 154             vpx_codec_iter_t iter = NULL;
 155             const vpx_codec_cx_pkt_t *pkt;
 156
 157 @@@@@@@@@@@@PER_FRAME_CFG
 158 @@@@@@@@@@@@ENCODE_FRAME
 159             got_data = 0;
 160             while( (pkt = vpx_codec_get_cx_data(&codec, &iter)) ) {
 161                 got_data = 1;
 162                 switch(pkt->kind) {
 163 @@@@@@@@@@@@@@@@PROCESS_FRAME
 164 @@@@@@@@@@@@@@@@PROCESS_STATS
 165                 default:
 166                     break;
 167                 }
 168                 printf(pkt->kind == VPX_CODEC_CX_FRAME_PKT
 169                        && (pkt->data.frame.flags & VPX_FRAME_IS_KEY)? "K":".");
 170                 fflush(stdout);
 171             }
 172             frame_cnt++;
 173         }
 174         printf("\n");
 175         fclose(infile);
 176 @@@@TWOPASS_LOOP_END
 177
 178     printf("Processed %d frames.\n",frame_cnt-1);
 179 @@@@DESTROY
 180
 181     /* Try to rewrite the file header with the actual frame count */
 182     if(!fseek(outfile, 0, SEEK_SET))
 183         write_ivf_file_header(outfile, &cfg, frame_cnt-1);
 184     fclose(outfile);
 185     return EXIT_SUCCESS;
 186 }