tools/aviocat.c

   1 /*
   2  * Copyright (c) 2012 Martin Storsjo
   3  *
   4  * This file is part of Libav.
   5  *
   6  * Libav is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * Libav is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with Libav; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23
  24 #include "libavutil/time.h"
  25 #include "libavformat/avformat.h"
  26
  27 static int usage(const char *argv0, int ret)
  28 {
  29     fprintf(stderr, "%s [-b bytespersec] [-d duration] [-oi <options>] [-oo <options>] input_url output_url\n", argv0);
  30     fprintf(stderr, "<options>: AVOptions expressed as key=value, :-separated\n");
  31     return ret;
  32 }
  33
  34 int main(int argc, char **argv)
  35 {
  36     int bps = 0, duration = 0, ret, i;
  37     const char *input_url = NULL, *output_url = NULL;
  38     int64_t stream_pos = 0;
  39     int64_t start_time;
  40     char errbuf[50];
  41     AVIOContext *input, *output;
  42     AVDictionary *in_opts = NULL;
  43     AVDictionary *out_opts = NULL;
  44
  45     av_register_all();
  46     avformat_network_init();
  47
  48     for (i = 1; i < argc; i++) {
  49         if (!strcmp(argv[i], "-b") && i + 1 < argc) {
  50             bps = atoi(argv[i + 1]);
  51             i++;
  52         } else if (!strcmp(argv[i], "-d") && i + 1 < argc) {
  53             duration = atoi(argv[i + 1]);
  54             i++;
  55         } else if (!strcmp(argv[i], "-oi") && i + 1 < argc) {
  56             if (av_dict_parse_string(&in_opts, argv[i + 1], "=", ":", 0) < 0) {
  57                 fprintf(stderr, "Cannot parse option string %s\n",
  58                         argv[i + 1]);
  59                 return usage(argv[0], 1);
  60             }
  61             i++;
  62         } else if (!strcmp(argv[i], "-oo") && i + 1 < argc) {
  63             if (av_dict_parse_string(&out_opts, argv[i + 1], "=", ":", 0) < 0) {
  64                 fprintf(stderr, "Cannot parse option string %s\n",
  65                         argv[i + 1]);
  66                 return usage(argv[0], 1);
  67             }
  68             i++;
  69         } else if (!input_url) {
  70             input_url = argv[i];
  71         } else if (!output_url) {
  72             output_url = argv[i];
  73         } else {
  74             return usage(argv[0], 1);
  75         }
  76     }
  77     if (!output_url)
  78         return usage(argv[0], 1);
  79
  80     ret = avio_open2(&input, input_url, AVIO_FLAG_READ, NULL, &in_opts);
  81     if (ret) {
  82         av_strerror(ret, errbuf, sizeof(errbuf));
  83         fprintf(stderr, "Unable to open %s: %s\n", input_url, errbuf);
  84         return 1;
  85     }
  86     if (duration && !bps) {
  87         int64_t size = avio_size(input);
  88         if (size < 0) {
  89             av_strerror(ret, errbuf, sizeof(errbuf));
  90             fprintf(stderr, "Unable to get size of %s: %s\n", input_url, errbuf);
  91             goto fail;
  92         }
  93         bps = size / duration;
  94     }
  95     ret = avio_open2(&output, output_url, AVIO_FLAG_WRITE, NULL, &out_opts);
  96     if (ret) {
  97         av_strerror(ret, errbuf, sizeof(errbuf));
  98         fprintf(stderr, "Unable to open %s: %s\n", output_url, errbuf);
  99         goto fail;
 100     }
 101
 102     start_time = av_gettime_relative();
 103     while (1) {
 104         uint8_t buf[1024];
 105         int n;
 106         n = avio_read(input, buf, sizeof(buf));
 107         if (n <= 0)
 108             break;
 109         avio_write(output, buf, n);
 110         if (output->error) {
 111             av_strerror(output->error, errbuf, sizeof(errbuf));
 112             fprintf(stderr, "Unable to write %s: %s\n", output_url, errbuf);
 113             break;
 114         }
 115         stream_pos += n;
 116         if (bps) {
 117             avio_flush(output);
 118             while ((av_gettime_relative() - start_time) * bps / AV_TIME_BASE < stream_pos)
 119                 av_usleep(50 * 1000);
 120         }
 121     }
 122
 123     avio_flush(output);
 124     avio_close(output);
 125
 126 fail:
 127     av_dict_free(&in_opts);
 128     av_dict_free(&out_opts);
 129     avio_close(input);
 130     avformat_network_deinit();
 131     return ret ? 1 : 0;
 132 }