avformat/fifo: Add fate test

Tested-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Jan Sebechlebsky <sebechlebskyjan@gmail.com>
Signed-off-by: Marton Balint <cus@passwd.hu>

1 files changed, 443 insertions, 0 deletions

diff --git a/libavformat/tests/fifo_muxer.c b/libavformat/tests/fifo_muxer.c
new file mode 100644
index 0000000000..9659198ff1
--- /dev/null
+++ b/libavformat/tests/fifo_muxer.c
@@ -0,0 +1,443 @@
+/*
+ * FIFO pseudo-muxer
+ * Copyright (c) 2016 Jan Sebechlebsky
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with FFmpeg; if not, write to the Free Software * Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdlib.h>
+#include "libavutil/opt.h"
+#include "libavutil/time.h"
+#include "libavutil/avassert.h"
+#include "libavformat/avformat.h"
+#include "libavformat/url.h"
+
+#define MAX_TST_PACKETS 128
+#define SLEEPTIME_50_MS 50000
+#define SLEEPTIME_10_MS 10000
+
+/* Implementation of mock muxer to simulate real muxer failures */
+
+/* This is structure of data sent in packets to
+ * failing muxer */
+typedef struct FailingMuxerPacketData {
+    int ret;             /* return value of write_packet call*/
+    int recover_after;   /* set ret to zero after this number of recovery attempts */
+    unsigned sleep_time; /* sleep for this long in write_packet to simulate long I/O operation */
+} FailingMuxerPacketData;
+
+
+typedef struct FailingMuxerContext {
+    AVClass *class;
+    int write_header_ret;
+    int write_trailer_ret;
+    /* If non-zero, summary of processed packets will be printed in deinit */
+    int print_deinit_summary;
+
+    int flush_count;
+    int pts_written[MAX_TST_PACKETS];
+    int pts_written_nr;
+} FailingMuxerContext;
+
+static int failing_write_header(AVFormatContext *avf)
+{
+    FailingMuxerContext *ctx = avf->priv_data;
+    return ctx->write_header_ret;
+}
+
+static int failing_write_packet(AVFormatContext *avf, AVPacket *pkt)
+{
+    FailingMuxerContext *ctx = avf->priv_data;
+    int ret = 0;
+    if (!pkt) {
+        ctx->flush_count++;
+    } else {
+        FailingMuxerPacketData *data = (FailingMuxerPacketData*) pkt->data;
+
+        if (!data->recover_after) {
+            data->ret = 0;
+        } else {
+            data->recover_after--;
+        }
+
+        ret = data->ret;
+
+        if (data->sleep_time) {
+            int64_t slept = 0;
+            while (slept < data->sleep_time) {
+                if (ff_check_interrupt(&avf->interrupt_callback))
+                    return AVERROR_EXIT;
+                av_usleep(SLEEPTIME_10_MS);
+                slept += SLEEPTIME_10_MS;
+            }
+        }
+
+        if (!ret) {
+            ctx->pts_written[ctx->pts_written_nr++] = pkt->pts;
+            av_packet_unref(pkt);
+        }
+    }
+    return ret;
+}
+
+static int failing_write_trailer(AVFormatContext *avf)
+{
+    FailingMuxerContext *ctx = avf->priv_data;
+    return ctx->write_trailer_ret;
+}
+
+static void failing_deinit(AVFormatContext *avf)
+{
+    int i;
+    FailingMuxerContext *ctx = avf->priv_data;
+
+    if (!ctx->print_deinit_summary)
+        return;
+
+    printf("flush count: %d\n", ctx->flush_count);
+    printf("pts seen nr: %d\n", ctx->pts_written_nr);
+    printf("pts seen: ");
+    for (i = 0; i < ctx->pts_written_nr; ++i ) {
+        printf(i ? ",%d" : "%d", ctx->pts_written[i]);
+    }
+    printf("\n");
+}
+#define OFFSET(x) offsetof(FailingMuxerContext, x)
+static const AVOption options[] = {
+        {"write_header_ret", "write_header() return value", OFFSET(write_header_ret),
+         AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
+        {"write_trailer_ret", "write_trailer() return value", OFFSET(write_trailer_ret),
+         AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
+        {"print_deinit_summary", "print summary when deinitializing muxer", OFFSET(print_deinit_summary),
+         AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
+        {NULL}
+    };
+
+static const AVClass failing_muxer_class = {
+    .class_name = "Failing test muxer",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+AVOutputFormat tst_failing_muxer = {
+    .name           = "fail",
+    .long_name      = NULL_IF_CONFIG_SMALL("Failing test muxer"),
+    .priv_data_size = sizeof(FailingMuxerContext),
+    .write_header   = failing_write_header,
+    .write_packet   = failing_write_packet,
+    .write_trailer  = failing_write_trailer,
+    .deinit         = failing_deinit,
+    .priv_class     = &failing_muxer_class,
+    .flags          = AVFMT_NOFILE | AVFMT_ALLOW_FLUSH,
+};
+
+static int prepare_packet(AVPacket *pkt,const FailingMuxerPacketData *pkt_data, int64_t pts)
+{
+    int ret;
+    FailingMuxerPacketData *data = av_malloc(sizeof(*data));
+    memcpy(data, pkt_data, sizeof(FailingMuxerPacketData));
+    ret = av_packet_from_data(pkt, (uint8_t*) data, sizeof(*data));
+
+    pkt->pts = pkt->dts = pts;
+    pkt->duration = 1;
+
+    return ret;
+}
+
+static int initialize_fifo_tst_muxer_chain(AVFormatContext **oc)
+{
+    int ret = 0;
+    AVStream *s;
+
+    ret = avformat_alloc_output_context2(oc, NULL, "fifo", "-");
+    if (ret) {
+        fprintf(stderr, "Failed to create format context: %s\n",
+                av_err2str(ret));
+        return EXIT_FAILURE;
+    }
+
+    s = avformat_new_stream(*oc, NULL);
+    if (!s) {
+        fprintf(stderr, "Failed to create stream: %s\n",
+                av_err2str(ret));
+        ret = AVERROR(ENOMEM);
+    }
+
+    return ret;
+}
+
+static int fifo_basic_test(AVFormatContext *oc, AVDictionary **opts,
+                             const FailingMuxerPacketData *pkt_data)
+{
+    int ret = 0, i;
+    AVPacket pkt;
+
+    av_init_packet(&pkt);
+
+
+    ret = avformat_write_header(oc, opts);
+    if (ret) {
+        fprintf(stderr, "Unexpected write_header failure: %s\n",
+                av_err2str(ret));
+        goto fail;
+    }
+
+    for (i = 0; i < 15; i++ ) {
+        ret = prepare_packet(&pkt, pkt_data, i);
+        if (ret < 0) {
+            fprintf(stderr, "Failed to prepare test packet: %s\n",
+                    av_err2str(ret));
+            goto write_trailer_and_fail;
+        }
+        ret = av_write_frame(oc, &pkt);
+        av_packet_unref(&pkt);
+        if (ret < 0) {
+            fprintf(stderr, "Unexpected write_frame error: %s\n",
+                    av_err2str(ret));
+            goto write_trailer_and_fail;
+        }
+    }
+
+    ret = av_write_frame(oc, NULL);
+    if (ret < 0) {
+        fprintf(stderr, "Unexpected write_frame error during flushing: %s\n",
+                av_err2str(ret));
+        goto write_trailer_and_fail;
+    }
+
+    ret = av_write_trailer(oc);
+    if (ret < 0) {
+        fprintf(stderr, "Unexpected write_trailer error during flushing: %s\n",
+                av_err2str(ret));
+        goto fail;
+    }
+
+    return ret;
+write_trailer_and_fail:
+    av_write_trailer(oc);
+fail:
+    return ret;
+}
+
+static int fifo_write_header_err_tst(AVFormatContext *oc, AVDictionary **opts,
+                                     const FailingMuxerPacketData *pkt_data)
+{
+    int ret = 0, i;
+    AVPacket pkt;
+
+    av_init_packet(&pkt);
+
+    ret = avformat_write_header(oc, opts);
+    if (ret) {
+        fprintf(stderr, "Unexpected write_header failure: %s\n",
+                av_err2str(ret));
+        goto fail;
+    }
+
+    for (i = 0; i < MAX_TST_PACKETS; i++ ) {
+        ret = prepare_packet(&pkt, pkt_data, i);
+        if (ret < 0) {
+            fprintf(stderr, "Failed to prepare test packet: %s\n",
+                    av_err2str(ret));
+            goto write_trailer_and_fail;
+        }
+        ret = av_write_frame(oc, &pkt);
+        av_packet_unref(&pkt);
+        if (ret < 0) {
+            break;
+        }
+    }
+
+    if (!ret) {
+        fprintf(stderr, "write_packet not failed when supposed to.\n");
+        goto fail;
+    } else if (ret != -1) {
+        fprintf(stderr, "Unexpected write_packet error: %s\n", av_err2str(ret));
+        goto fail;
+    }
+
+    ret = av_write_trailer(oc);
+    if (ret < 0)
+        fprintf(stderr, "Unexpected write_trailer error: %s\n", av_err2str(ret));
+
+    return ret;
+write_trailer_and_fail:
+    av_write_trailer(oc);
+fail:
+    return ret;
+}
+
+static int fifo_overflow_drop_test(AVFormatContext *oc, AVDictionary **opts,
+                                   const FailingMuxerPacketData *data)
+{
+    int ret = 0, i;
+    int64_t write_pkt_start, write_pkt_end, duration;
+    AVPacket pkt;
+
+    av_init_packet(&pkt);
+
+    ret = avformat_write_header(oc, opts);
+    if (ret) {
+        fprintf(stderr, "Unexpected write_header failure: %s\n",
+                av_err2str(ret));
+        return ret;
+    }
+
+    write_pkt_start = av_gettime_relative();
+    for (i = 0; i < 6; i++ ) {
+        ret = prepare_packet(&pkt, data, i);
+        if (ret < 0) {
+            fprintf(stderr, "Failed to prepare test packet: %s\n",
+                    av_err2str(ret));
+            goto fail;
+        }
+        ret = av_write_frame(oc, &pkt);
+        av_packet_unref(&pkt);
+        if (ret < 0) {
+            break;
+        }
+    }
+    write_pkt_end = av_gettime_relative();
+    duration = write_pkt_end - write_pkt_start;
+    if (duration > (SLEEPTIME_50_MS*6)/2) {
+        fprintf(stderr, "Writing packets to fifo muxer took too much time while testing"
+                        "buffer overflow with drop_pkts_on_overflow was on.\n");
+        ret = AVERROR_BUG;
+        goto fail;
+    }
+
+    if (ret) {
+        fprintf(stderr, "Unexpected write_packet error: %s\n", av_err2str(ret));
+        goto fail;
+    }
+
+    ret = av_write_trailer(oc);
+    if (ret < 0)
+        fprintf(stderr, "Unexpected write_trailer error: %s\n", av_err2str(ret));
+
+    return ret;
+fail:
+    av_write_trailer(oc);
+    return ret;
+}
+
+typedef struct TestCase {
+    int (*test_func)(AVFormatContext *, AVDictionary **,const FailingMuxerPacketData *pkt_data);
+    const char *test_name;
+    const char *options;
+
+    uint8_t print_summary_on_deinit;
+    int write_header_ret;
+    int write_trailer_ret;
+
+    FailingMuxerPacketData pkt_data;
+} TestCase;
+
+
+#define BUFFER_SIZE 64
+
+static int run_test(const TestCase *test)
+{
+    AVDictionary *opts = NULL;
+    AVFormatContext *oc = NULL;
+    char buffer[BUFFER_SIZE];
+    int ret, ret1;
+
+    ret = initialize_fifo_tst_muxer_chain(&oc);
+    if (ret < 0) {
+        fprintf(stderr, "Muxer initialization failed: %s\n", av_err2str(ret));
+        goto end;
+    }
+
+    if (test->options) {
+        ret = av_dict_parse_string(&opts, test->options, "=", ":", 0);
+        if (ret < 0) {
+            fprintf(stderr, "Failed to parse options: %s\n", av_err2str(ret));
+            goto end;
+        }
+    }
+
+    snprintf(buffer, BUFFER_SIZE,
+             "print_deinit_summary=%d:write_header_ret=%d:write_trailer_ret=%d",
+             (int)test->print_summary_on_deinit, test->write_header_ret,
+             test->write_trailer_ret);
+    ret = av_dict_set(&opts, "format_opts", buffer, 0);
+    ret1 = av_dict_set(&opts, "fifo_format", "fail", 0);
+    if (ret < 0 || ret1 < 0) {
+        fprintf(stderr, "Failed to set options for test muxer: %s\n",
+                av_err2str(ret));
+        goto end;
+    }
+
+    ret = test->test_func(oc, &opts, &test->pkt_data);
+
+end:
+    printf("%s: %s\n", test->test_name, ret < 0 ? "fail" : "ok");
+    avformat_free_context(oc);
+    av_dict_free(&opts);
+    return ret;
+}
+
+
+const TestCase tests[] = {
+        /* Simple test in packet-non-dropping mode, we expect to get on the output
+         * exactly what was on input */
+        {fifo_basic_test, "nonfail test", NULL,1, 0, 0, {0, 0, 0}},
+
+        /* Test that we receive delayed write_header error from one of the write_packet
+         * calls. */
+        {fifo_write_header_err_tst, "write header error test", NULL, 0, -1, 0, {0, 0, 0}},
+
+        /* Each write_packet will fail 3 times before operation is successful. If recovery
+         * Since recovery is on, fifo muxer should not return any errors. */
+        {fifo_basic_test, "recovery test", "attempt_recovery=1:recovery_wait_time=0",
+         0, 0, 0, {AVERROR(ETIMEDOUT), 3, 0}},
+
+        /* By setting low queue_size and sending packets with longer processing time,
+         * this test will cause queue to overflow, since drop_pkts_on_overflow is off
+         * by default, all packets should be processed and fifo should block on full
+         * queue. */
+        {fifo_basic_test, "overflow without packet dropping","queue_size=3",
+         1, 0, 0, {0, 0, SLEEPTIME_10_MS}},
+
+        /* The test as the upper one, except that drop_on_overflow is turned on. In this case
+         * fifo should not block when the queue is full and slow down producer, so the test
+         * measures time producer spends on write_packet calls which should be significantly
+         * less than number_of_pkts * 50 MS.
+         */
+        {fifo_overflow_drop_test, "overflow with packet dropping", "queue_size=3:drop_pkts_on_overflow=1",
+         0, 0, 0, {0, 0, SLEEPTIME_50_MS}},
+
+        {NULL}
+};
+
+int main(int argc, char *argv[])
+{
+    int i, ret, ret_all = 0;
+
+    av_register_all();
+    av_register_output_format(&tst_failing_muxer);
+
+    for (i = 0; tests[i].test_func; i++) {
+        ret = run_test(&tests[i]);
+        if (!ret_all && ret < 0)
+            ret_all = ret;
+    }
+
+    return ret;
+}