New file |
| | |
| | | /* |
| | | * Copyright (c) 2015 Stephan Holljes |
| | | * |
| | | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| | | * of this software and associated documentation files (the "Software"), to deal |
| | | * in the Software without restriction, including without limitation the rights |
| | | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| | | * copies of the Software, and to permit persons to whom the Software is |
| | | * furnished to do so, subject to the following conditions: |
| | | * |
| | | * The above copyright notice and this permission notice shall be included in |
| | | * all copies or substantial portions of the Software. |
| | | * |
| | | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| | | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| | | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| | | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| | | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| | | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| | | * THE SOFTWARE. |
| | | */ |
| | | |
| | | /** |
| | | * @file |
| | | * libavformat multi-client network API usage example. |
| | | * |
| | | * @example http_multiclient.c |
| | | * This example will serve a file without decoding or demuxing it over http. |
| | | * Multiple clients can connect and will receive the same file. |
| | | */ |
| | | |
| | | #include <libavformat/avformat.h> |
| | | #include <libavutil/opt.h> |
| | | #include <unistd.h> |
| | | |
| | | static void process_client(AVIOContext *client, const char *in_uri) |
| | | { |
| | | AVIOContext *input = NULL; |
| | | uint8_t buf[1024]; |
| | | int ret, n, reply_code; |
| | | uint8_t *resource = NULL; |
| | | while ((ret = avio_handshake(client)) > 0) { |
| | | av_opt_get(client, "resource", AV_OPT_SEARCH_CHILDREN, &resource); |
| | | // check for strlen(resource) is necessary, because av_opt_get() |
| | | // may return empty string. |
| | | if (resource && strlen(resource)) |
| | | break; |
| | | av_freep(&resource); |
| | | } |
| | | if (ret < 0) |
| | | goto end; |
| | | av_log(client, AV_LOG_TRACE, "resource=%p\n", resource); |
| | | if (resource && resource[0] == '/' && !strcmp((resource + 1), in_uri)) { |
| | | reply_code = 200; |
| | | } else { |
| | | reply_code = AVERROR_HTTP_NOT_FOUND; |
| | | } |
| | | if ((ret = av_opt_set_int(client, "reply_code", reply_code, AV_OPT_SEARCH_CHILDREN)) < 0) { |
| | | av_log(client, AV_LOG_ERROR, "Failed to set reply_code: %s.\n", av_err2str(ret)); |
| | | goto end; |
| | | } |
| | | av_log(client, AV_LOG_TRACE, "Set reply code to %d\n", reply_code); |
| | | |
| | | while ((ret = avio_handshake(client)) > 0); |
| | | |
| | | if (ret < 0) |
| | | goto end; |
| | | |
| | | fprintf(stderr, "Handshake performed.\n"); |
| | | if (reply_code != 200) |
| | | goto end; |
| | | fprintf(stderr, "Opening input file.\n"); |
| | | if ((ret = avio_open2(&input, in_uri, AVIO_FLAG_READ, NULL, NULL)) < 0) { |
| | | av_log(input, AV_LOG_ERROR, "Failed to open input: %s: %s.\n", in_uri, |
| | | av_err2str(ret)); |
| | | goto end; |
| | | } |
| | | for(;;) { |
| | | n = avio_read(input, buf, sizeof(buf)); |
| | | if (n < 0) { |
| | | if (n == AVERROR_EOF) |
| | | break; |
| | | av_log(input, AV_LOG_ERROR, "Error reading from input: %s.\n", |
| | | av_err2str(n)); |
| | | break; |
| | | } |
| | | avio_write(client, buf, n); |
| | | avio_flush(client); |
| | | } |
| | | end: |
| | | fprintf(stderr, "Flushing client\n"); |
| | | avio_flush(client); |
| | | fprintf(stderr, "Closing client\n"); |
| | | avio_close(client); |
| | | fprintf(stderr, "Closing input\n"); |
| | | avio_close(input); |
| | | av_freep(&resource); |
| | | } |
| | | |
| | | int main(int argc, char **argv) |
| | | { |
| | | AVDictionary *options = NULL; |
| | | AVIOContext *client = NULL, *server = NULL; |
| | | const char *in_uri, *out_uri; |
| | | int ret, pid; |
| | | av_log_set_level(AV_LOG_TRACE); |
| | | if (argc < 3) { |
| | | printf("usage: %s input http://hostname[:port]\n" |
| | | "API example program to serve http to multiple clients.\n" |
| | | "\n", argv[0]); |
| | | return 1; |
| | | } |
| | | |
| | | in_uri = argv[1]; |
| | | out_uri = argv[2]; |
| | | |
| | | avformat_network_init(); |
| | | |
| | | if ((ret = av_dict_set(&options, "listen", "2", 0)) < 0) { |
| | | fprintf(stderr, "Failed to set listen mode for server: %s\n", av_err2str(ret)); |
| | | return ret; |
| | | } |
| | | if ((ret = avio_open2(&server, out_uri, AVIO_FLAG_WRITE, NULL, &options)) < 0) { |
| | | fprintf(stderr, "Failed to open server: %s\n", av_err2str(ret)); |
| | | return ret; |
| | | } |
| | | fprintf(stderr, "Entering main loop.\n"); |
| | | for(;;) { |
| | | if ((ret = avio_accept(server, &client)) < 0) |
| | | goto end; |
| | | fprintf(stderr, "Accepted client, forking process.\n"); |
| | | // XXX: Since we don't reap our children and don't ignore signals |
| | | // this produces zombie processes. |
| | | pid = fork(); |
| | | if (pid < 0) { |
| | | perror("Fork failed"); |
| | | ret = AVERROR(errno); |
| | | goto end; |
| | | } |
| | | if (pid == 0) { |
| | | fprintf(stderr, "In child.\n"); |
| | | process_client(client, in_uri); |
| | | avio_close(server); |
| | | exit(0); |
| | | } |
| | | if (pid > 0) |
| | | avio_close(client); |
| | | } |
| | | end: |
| | | avio_close(server); |
| | | if (ret < 0 && ret != AVERROR_EOF) { |
| | | fprintf(stderr, "Some errors occurred: %s\n", av_err2str(ret)); |
| | | return 1; |
| | | } |
| | | return 0; |
| | | } |