285 lines
8.5 KiB
C
285 lines
8.5 KiB
C
/*
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* FIFO pseudo-muxer
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* Copyright (c) 2016 Jan Sebechlebsky
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* 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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* FFmpeg 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
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* GNU 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 License
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* along with FFmpeg; if not, write to the Free Software * Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdlib.h>
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#include "libavutil/opt.h"
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#include "libavutil/time.h"
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#include "libavutil/avassert.h"
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#include "libavformat/avformat.h"
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#include "libavformat/url.h"
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#include "libavformat/network.h"
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#define MAX_TST_PACKETS 128
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#define SLEEPTIME_50_MS 50000
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#define SLEEPTIME_10_MS 10000
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/* This is structure of data sent in packets to
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* failing muxer */
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typedef struct FailingMuxerPacketData {
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int ret; /* return value of write_packet call*/
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int recover_after; /* set ret to zero after this number of recovery attempts */
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unsigned sleep_time; /* sleep for this long in write_packet to simulate long I/O operation */
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} FailingMuxerPacketData;
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static int prepare_packet(AVPacket *pkt, const FailingMuxerPacketData *pkt_data, int64_t pts)
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{
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int ret;
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FailingMuxerPacketData *data = av_malloc(sizeof(*data));
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if (!data) {
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return AVERROR(ENOMEM);
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}
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memcpy(data, pkt_data, sizeof(FailingMuxerPacketData));
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ret = av_packet_from_data(pkt, (uint8_t*) data, sizeof(*data));
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pkt->pts = pkt->dts = pts;
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pkt->duration = 1;
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return ret;
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}
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static int initialize_fifo_tst_muxer_chain(AVFormatContext **oc)
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{
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int ret = 0;
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AVStream *s;
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ret = avformat_alloc_output_context2(oc, NULL, "fifo", "-");
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if (ret) {
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fprintf(stderr, "Failed to create format context: %s\n",
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av_err2str(ret));
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return EXIT_FAILURE;
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}
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s = avformat_new_stream(*oc, NULL);
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if (!s) {
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fprintf(stderr, "Failed to create stream: %s\n",
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av_err2str(ret));
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ret = AVERROR(ENOMEM);
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}
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return ret;
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}
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static int fifo_basic_test(AVFormatContext *oc, AVDictionary **opts,
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const FailingMuxerPacketData *pkt_data)
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{
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int ret = 0, i;
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AVPacket pkt;
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av_init_packet(&pkt);
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ret = avformat_write_header(oc, opts);
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if (ret) {
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fprintf(stderr, "Unexpected write_header failure: %s\n",
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av_err2str(ret));
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goto fail;
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}
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for (i = 0; i < 15; i++ ) {
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ret = prepare_packet(&pkt, pkt_data, i);
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if (ret < 0) {
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fprintf(stderr, "Failed to prepare test packet: %s\n",
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av_err2str(ret));
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goto write_trailer_and_fail;
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}
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ret = av_write_frame(oc, &pkt);
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av_packet_unref(&pkt);
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if (ret < 0) {
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fprintf(stderr, "Unexpected write_frame error: %s\n",
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av_err2str(ret));
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goto write_trailer_and_fail;
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}
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}
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ret = av_write_frame(oc, NULL);
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if (ret < 0) {
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fprintf(stderr, "Unexpected write_frame error during flushing: %s\n",
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av_err2str(ret));
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goto write_trailer_and_fail;
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}
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ret = av_write_trailer(oc);
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if (ret < 0) {
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fprintf(stderr, "Unexpected write_trailer error during flushing: %s\n",
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av_err2str(ret));
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goto fail;
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}
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return ret;
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write_trailer_and_fail:
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av_write_trailer(oc);
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fail:
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return ret;
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}
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static int fifo_overflow_drop_test(AVFormatContext *oc, AVDictionary **opts,
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const FailingMuxerPacketData *data)
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{
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int ret = 0, i;
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int64_t write_pkt_start, write_pkt_end, duration;
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AVPacket pkt;
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av_init_packet(&pkt);
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ret = avformat_write_header(oc, opts);
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if (ret) {
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fprintf(stderr, "Unexpected write_header failure: %s\n",
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av_err2str(ret));
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return ret;
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}
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write_pkt_start = av_gettime_relative();
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for (i = 0; i < 6; i++ ) {
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ret = prepare_packet(&pkt, data, i);
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if (ret < 0) {
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fprintf(stderr, "Failed to prepare test packet: %s\n",
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av_err2str(ret));
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goto fail;
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}
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ret = av_write_frame(oc, &pkt);
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av_packet_unref(&pkt);
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if (ret < 0) {
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break;
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}
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}
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write_pkt_end = av_gettime_relative();
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duration = write_pkt_end - write_pkt_start;
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if (duration > (SLEEPTIME_50_MS*6)/2) {
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fprintf(stderr, "Writing packets to fifo muxer took too much time while testing"
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"buffer overflow with drop_pkts_on_overflow was on.\n");
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ret = AVERROR_BUG;
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goto fail;
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}
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if (ret) {
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fprintf(stderr, "Unexpected write_packet error: %s\n", av_err2str(ret));
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goto fail;
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}
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ret = av_write_trailer(oc);
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if (ret < 0)
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fprintf(stderr, "Unexpected write_trailer error: %s\n", av_err2str(ret));
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return ret;
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fail:
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av_write_trailer(oc);
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return ret;
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}
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typedef struct TestCase {
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int (*test_func)(AVFormatContext *, AVDictionary **,const FailingMuxerPacketData *pkt_data);
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const char *test_name;
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const char *options;
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uint8_t print_summary_on_deinit;
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int write_header_ret;
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int write_trailer_ret;
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FailingMuxerPacketData pkt_data;
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} TestCase;
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#define BUFFER_SIZE 64
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static int run_test(const TestCase *test)
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{
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AVDictionary *opts = NULL;
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AVFormatContext *oc = NULL;
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char buffer[BUFFER_SIZE];
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int ret, ret1;
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ret = initialize_fifo_tst_muxer_chain(&oc);
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if (ret < 0) {
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fprintf(stderr, "Muxer initialization failed: %s\n", av_err2str(ret));
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goto end;
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}
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if (test->options) {
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ret = av_dict_parse_string(&opts, test->options, "=", ":", 0);
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if (ret < 0) {
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fprintf(stderr, "Failed to parse options: %s\n", av_err2str(ret));
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goto end;
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}
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}
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snprintf(buffer, BUFFER_SIZE,
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"print_deinit_summary=%d:write_header_ret=%d:write_trailer_ret=%d",
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(int)test->print_summary_on_deinit, test->write_header_ret,
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test->write_trailer_ret);
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ret = av_dict_set(&opts, "format_opts", buffer, 0);
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ret1 = av_dict_set(&opts, "fifo_format", "fifo_test", 0);
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if (ret < 0 || ret1 < 0) {
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fprintf(stderr, "Failed to set options for test muxer: %s\n",
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av_err2str(ret));
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goto end;
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}
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ret = test->test_func(oc, &opts, &test->pkt_data);
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end:
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printf("%s: %s\n", test->test_name, ret < 0 ? "fail" : "ok");
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avformat_free_context(oc);
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av_dict_free(&opts);
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return ret;
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}
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const TestCase tests[] = {
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/* Simple test in packet-non-dropping mode, we expect to get on the output
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* exactly what was on input */
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{fifo_basic_test, "nonfail test", NULL,1, 0, 0, {0, 0, 0}},
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/* Each write_packet will fail 3 times before operation is successful. If recovery
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* Since recovery is on, fifo muxer should not return any errors. */
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{fifo_basic_test, "recovery test", "attempt_recovery=1:recovery_wait_time=0",
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0, 0, 0, {AVERROR(ETIMEDOUT), 3, 0}},
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/* By setting low queue_size and sending packets with longer processing time,
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* this test will cause queue to overflow, since drop_pkts_on_overflow is off
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* by default, all packets should be processed and fifo should block on full
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* queue. */
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{fifo_basic_test, "overflow without packet dropping","queue_size=3",
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1, 0, 0, {0, 0, SLEEPTIME_10_MS}},
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/* The test as the upper one, except that drop_on_overflow is turned on. In this case
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* fifo should not block when the queue is full and slow down producer, so the test
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* measures time producer spends on write_packet calls which should be significantly
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* less than number_of_pkts * 50 MS.
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*/
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{fifo_overflow_drop_test, "overflow with packet dropping", "queue_size=3:drop_pkts_on_overflow=1",
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0, 0, 0, {0, 0, SLEEPTIME_50_MS}},
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{NULL}
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};
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int main(int argc, char *argv[])
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{
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int i, ret, ret_all = 0;
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for (i = 0; tests[i].test_func; i++) {
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ret = run_test(&tests[i]);
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if (!ret_all && ret < 0)
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ret_all = ret;
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}
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return ret;
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}
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