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2ba45a60 DM |
1 | /* |
2 | * Copyright (c) 2012 Martin Storsjo | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg 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 | * FFmpeg 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 FFmpeg; 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] input_url output_url\n", argv0); | |
30 | return ret; | |
31 | } | |
32 | ||
33 | int main(int argc, char **argv) | |
34 | { | |
35 | int bps = 0, duration = 0, ret, i; | |
36 | const char *input_url = NULL, *output_url = NULL; | |
37 | int64_t stream_pos = 0; | |
38 | int64_t start_time; | |
39 | char errbuf[50]; | |
40 | AVIOContext *input, *output; | |
41 | ||
42 | av_register_all(); | |
43 | avformat_network_init(); | |
44 | ||
45 | for (i = 1; i < argc; i++) { | |
46 | if (!strcmp(argv[i], "-b") && i + 1 < argc) { | |
47 | bps = atoi(argv[i + 1]); | |
48 | i++; | |
49 | } else if (!strcmp(argv[i], "-d") && i + 1 < argc) { | |
50 | duration = atoi(argv[i + 1]); | |
51 | i++; | |
52 | } else if (!input_url) { | |
53 | input_url = argv[i]; | |
54 | } else if (!output_url) { | |
55 | output_url = argv[i]; | |
56 | } else { | |
57 | return usage(argv[0], 1); | |
58 | } | |
59 | } | |
60 | if (!output_url) | |
61 | return usage(argv[0], 1); | |
62 | ||
63 | ret = avio_open2(&input, input_url, AVIO_FLAG_READ, NULL, NULL); | |
64 | if (ret) { | |
65 | av_strerror(ret, errbuf, sizeof(errbuf)); | |
66 | fprintf(stderr, "Unable to open %s: %s\n", input_url, errbuf); | |
67 | return 1; | |
68 | } | |
69 | if (duration && !bps) { | |
70 | int64_t size = avio_size(input); | |
71 | if (size < 0) { | |
72 | av_strerror(ret, errbuf, sizeof(errbuf)); | |
73 | fprintf(stderr, "Unable to get size of %s: %s\n", input_url, errbuf); | |
74 | goto fail; | |
75 | } | |
76 | bps = size / duration; | |
77 | } | |
78 | ret = avio_open2(&output, output_url, AVIO_FLAG_WRITE, NULL, NULL); | |
79 | if (ret) { | |
80 | av_strerror(ret, errbuf, sizeof(errbuf)); | |
81 | fprintf(stderr, "Unable to open %s: %s\n", output_url, errbuf); | |
82 | goto fail; | |
83 | } | |
84 | ||
85 | start_time = av_gettime_relative(); | |
86 | while (1) { | |
87 | uint8_t buf[1024]; | |
88 | int n; | |
89 | n = avio_read(input, buf, sizeof(buf)); | |
90 | if (n <= 0) | |
91 | break; | |
92 | avio_write(output, buf, n); | |
93 | stream_pos += n; | |
94 | if (bps) { | |
95 | avio_flush(output); | |
96 | while ((av_gettime_relative() - start_time) * bps / AV_TIME_BASE < stream_pos) | |
97 | av_usleep(50 * 1000); | |
98 | } | |
99 | } | |
100 | ||
101 | avio_flush(output); | |
102 | avio_close(output); | |
103 | ||
104 | fail: | |
105 | avio_close(input); | |
106 | avformat_network_deinit(); | |
107 | return ret ? 1 : 0; | |
108 | } |