shithub: opus

ref: 1c80f649601a4f7250a84d27903b564c6594596c
dir: /src/repacketizer_demo.c/

#include "opus.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX_PACKETOUT 32000

void usage(char *argv0)
{
   fprintf(stderr, "usage: %s [options] input_file output_file\n", argv0);
}

static void int_to_char(opus_uint32 i, unsigned char ch[4])
{
    ch[0] = i>>24;
    ch[1] = (i>>16)&0xFF;
    ch[2] = (i>>8)&0xFF;
    ch[3] = i&0xFF;
}

static opus_uint32 char_to_int(unsigned char ch[4])
{
    return ((opus_uint32)ch[0]<<24) | ((opus_uint32)ch[1]<<16)
         | ((opus_uint32)ch[2]<< 8) |  (opus_uint32)ch[3];
}

int main(int argc, char *argv[])
{
   int i, eof=0;
   FILE *fin, *fout;
   unsigned char packets[48][1500];
   int len[48];
   int rng[48];
   OpusRepacketizer *rp;
   unsigned char output_packet[MAX_PACKETOUT];
   int merge = 1, split=0;

   if (argc < 3)
   {
      usage(argv[0]);
      return 1;
   }
   for (i=1;i<argc-2;i++)
   {
      if (strcmp(argv[i], "-merge")==0)
      {
         merge = atoi(argv[i+1]);
         if(merge<1)
         {
            fprintf(stderr, "-merge parameter must be at least 1.\n");
            return 1;
         }
         i++;
      } else if (strcmp(argv[i], "-split")==0)
         split = 1;
      else
      {
         fprintf(stderr, "Unknown option: %s\n", argv[i]);
         usage(argv[0]);
         return 1;
      }
   }
   fin = fopen(argv[argc-2], "r");
   if(fin==NULL)
   {
     fprintf(stderr, "Error opening input file: %s\n", argv[argc-2]);
     return 1;
   }
   fout = fopen(argv[argc-1], "w");
   if(fout==NULL)
   {
     fprintf(stderr, "Error opening output file: %s\n", argv[argc-1]);
     fclose(fin);
     return 1;
   }

   rp = opus_repacketizer_create();
   while (!eof)
   {
      int err;
      int nb_packets=merge;
      opus_repacketizer_init(rp);
      for (i=0;i<nb_packets;i++)
      {
         unsigned char ch[4];
         err = fread(ch, 1, 4, fin);
         len[i] = char_to_int(ch);
         /*fprintf(stderr, "in len = %d\n", len[i]);*/
         if (len[i]>1500 || len[i]<0)
         {
             if (feof(fin))
             {
                eof = 1;
             } else {
                fprintf(stderr, "Invalid payload length\n");
                fclose(fin);
                fclose(fout);
                return 1;
             }
             break;
         }
         err = fread(ch, 1, 4, fin);
         rng[i] = char_to_int(ch);
         err = fread(packets[i], 1, len[i], fin);
         if (feof(fin))
         {
            eof = 1;
            break;
         }
         err = opus_repacketizer_cat(rp, packets[i], len[i]);
         if (err!=OPUS_OK)
         {
            fprintf(stderr, "opus_repacketizer_cat() failed: %s\n", opus_strerror(err));
            break;
         }
      }
      nb_packets = i;

      if (eof)
         break;

      if (!split)
      {
         err = opus_repacketizer_out(rp, output_packet, MAX_PACKETOUT);
         if (err>0) {
            unsigned char int_field[4];
            int_to_char(err, int_field);
            fwrite(int_field, 1, 4, fout);
            int_to_char(rng[nb_packets-1], int_field);
            fwrite(int_field, 1, 4, fout);
            fwrite(output_packet, 1, err, fout);
            /*fprintf(stderr, "out len = %d\n", err);*/
         } else {
            fprintf(stderr, "opus_repacketizer_out() failed: %s\n", opus_strerror(err));
         }
      } else {
         int nb_frames = opus_repacketizer_get_nb_frames(rp);
         for (i=0;i<nb_frames;i++)
         {
            err = opus_repacketizer_out_range(rp, i, i+1, output_packet, MAX_PACKETOUT);
            if (err>0) {
               unsigned char int_field[4];
               int_to_char(err, int_field);
               fwrite(int_field, 1, 4, fout);
               if (i==nb_frames-1)
                  int_to_char(rng[nb_packets-1], int_field);
               else
                  int_to_char(0, int_field);
               fwrite(int_field, 1, 4, fout);
               fwrite(output_packet, 1, err, fout);
               /*fprintf(stderr, "out len = %d\n", err);*/
            } else {
               fprintf(stderr, "opus_repacketizer_out() failed: %s\n", opus_strerror(err));
            }

         }
      }

   }

   fclose(fin);
   fclose(fout);
   return 0;
}