mirror of
https://github.com/librempeg/librempeg
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87acd33c09
This avoids the caller having to calculate the byte rate if wanting to push a file in a rate resembling realtime. Signed-off-by: Martin Storsjö <martin@martin.st>
109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/*
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* Copyright (c) 2012 Martin Storsjo
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "libavutil/time.h"
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#include "libavformat/avformat.h"
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static int usage(const char *argv0, int ret)
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{
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fprintf(stderr, "%s [-b bytespersec] [-d duration] input_url output_url\n", argv0);
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return ret;
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}
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int main(int argc, char **argv)
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{
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int bps = 0, duration = 0, ret, i;
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const char *input_url = NULL, *output_url = NULL;
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int64_t stream_pos = 0;
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int64_t start_time;
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char errbuf[50];
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AVIOContext *input, *output;
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av_register_all();
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avformat_network_init();
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for (i = 1; i < argc; i++) {
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if (!strcmp(argv[i], "-b") && i + 1 < argc) {
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bps = atoi(argv[i + 1]);
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i++;
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} else if (!strcmp(argv[i], "-d") && i + 1 < argc) {
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duration = atoi(argv[i + 1]);
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i++;
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} else if (!input_url) {
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input_url = argv[i];
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} else if (!output_url) {
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output_url = argv[i];
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} else {
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return usage(argv[0], 1);
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}
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}
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if (!output_url)
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return usage(argv[0], 1);
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ret = avio_open2(&input, input_url, AVIO_FLAG_READ, NULL, NULL);
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if (ret) {
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av_strerror(ret, errbuf, sizeof(errbuf));
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fprintf(stderr, "Unable to open %s: %s\n", input_url, errbuf);
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return 1;
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}
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if (duration && !bps) {
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int64_t size = avio_size(input);
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if (size < 0) {
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av_strerror(ret, errbuf, sizeof(errbuf));
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fprintf(stderr, "Unable to get size of %s: %s\n", input_url, errbuf);
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goto fail;
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}
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bps = size / duration;
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}
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ret = avio_open2(&output, output_url, AVIO_FLAG_WRITE, NULL, NULL);
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if (ret) {
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av_strerror(ret, errbuf, sizeof(errbuf));
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fprintf(stderr, "Unable to open %s: %s\n", output_url, errbuf);
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goto fail;
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}
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start_time = av_gettime();
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while (1) {
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uint8_t buf[1024];
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int n;
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n = avio_read(input, buf, sizeof(buf));
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if (n <= 0)
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break;
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avio_write(output, buf, n);
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stream_pos += n;
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if (bps) {
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avio_flush(output);
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while ((av_gettime() - start_time) * bps / AV_TIME_BASE < stream_pos)
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av_usleep(50 * 1000);
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}
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}
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avio_flush(output);
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avio_close(output);
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fail:
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avio_close(input);
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avformat_network_deinit();
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return ret ? 1 : 0;
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}
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