making act segmenter

1 files changed, 0 insertions, 828 deletions

diff --git a/ffmpeg1/libavformat/hls.c b/ffmpeg1/libavformat/hls.c
deleted file mode 100644
index 7de6059..0000000
--- a/ffmpeg1/libavformat/hls.c
+++ /dev/null
@@ -1,828 +0,0 @@
-/*
- * Apple HTTP Live Streaming demuxer
- * Copyright (c) 2010 Martin Storsjo
- *
- * 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
- */
-
-/**
- * @file
- * Apple HTTP Live Streaming demuxer
- * http://tools.ietf.org/html/draft-pantos-http-live-streaming
- */
-
-#include "libavutil/avstring.h"
-#include "libavutil/intreadwrite.h"
-#include "libavutil/mathematics.h"
-#include "libavutil/opt.h"
-#include "libavutil/dict.h"
-#include "libavutil/time.h"
-#include "avformat.h"
-#include "internal.h"
-#include "avio_internal.h"
-#include "url.h"
-
-#define INITIAL_BUFFER_SIZE 32768
-
-/*
- * An apple http stream consists of a playlist with media segment files,
- * played sequentially. There may be several playlists with the same
- * video content, in different bandwidth variants, that are played in
- * parallel (preferably only one bandwidth variant at a time). In this case,
- * the user supplied the url to a main playlist that only lists the variant
- * playlists.
- *
- * If the main playlist doesn't point at any variants, we still create
- * one anonymous toplevel variant for this, to maintain the structure.
- */
-
-enum KeyType {
-    KEY_NONE,
-    KEY_AES_128,
-};
-
-struct segment {
-    int duration;
-    char url[MAX_URL_SIZE];
-    char key[MAX_URL_SIZE];
-    enum KeyType key_type;
-    uint8_t iv[16];
-};
-
-/*
- * Each variant has its own demuxer. If it currently is active,
- * it has an open AVIOContext too, and potentially an AVPacket
- * containing the next packet from this stream.
- */
-struct variant {
-    int bandwidth;
-    char url[MAX_URL_SIZE];
-    AVIOContext pb;
-    uint8_t* read_buffer;
-    URLContext *input;
-    AVFormatContext *parent;
-    int index;
-    AVFormatContext *ctx;
-    AVPacket pkt;
-    int stream_offset;
-
-    int finished;
-    int target_duration;
-    int start_seq_no;
-    int n_segments;
-    struct segment **segments;
-    int needed, cur_needed;
-    int cur_seq_no;
-    int64_t last_load_time;
-
-    char key_url[MAX_URL_SIZE];
-    uint8_t key[16];
-};
-
-typedef struct HLSContext {
-    int n_variants;
-    struct variant **variants;
-    int cur_seq_no;
-    int end_of_segment;
-    int first_packet;
-    int64_t first_timestamp;
-    int64_t seek_timestamp;
-    int seek_flags;
-    AVIOInterruptCB *interrupt_callback;
-    char *user_agent;                    ///< holds HTTP user agent set as an AVOption to the HTTP protocol context
-    char *cookies;                       ///< holds HTTP cookie values set in either the initial response or as an AVOption to the HTTP protocol context
-} HLSContext;
-
-static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
-{
-    int len = ff_get_line(s, buf, maxlen);
-    while (len > 0 && av_isspace(buf[len - 1]))
-        buf[--len] = '\0';
-    return len;
-}
-
-static void free_segment_list(struct variant *var)
-{
-    int i;
-    for (i = 0; i < var->n_segments; i++)
-        av_free(var->segments[i]);
-    av_freep(&var->segments);
-    var->n_segments = 0;
-}
-
-static void free_variant_list(HLSContext *c)
-{
-    int i;
-    for (i = 0; i < c->n_variants; i++) {
-        struct variant *var = c->variants[i];
-        free_segment_list(var);
-        av_free_packet(&var->pkt);
-        av_free(var->pb.buffer);
-        if (var->input)
-            ffurl_close(var->input);
-        if (var->ctx) {
-            var->ctx->pb = NULL;
-            avformat_close_input(&var->ctx);
-        }
-        av_free(var);
-    }
-    av_freep(&c->variants);
-    av_freep(&c->cookies);
-    av_freep(&c->user_agent);
-    c->n_variants = 0;
-}
-
-/*
- * Used to reset a statically allocated AVPacket to a clean slate,
- * containing no data.
- */
-static void reset_packet(AVPacket *pkt)
-{
-    av_init_packet(pkt);
-    pkt->data = NULL;
-}
-
-static struct variant *new_variant(HLSContext *c, int bandwidth,
-                                   const char *url, const char *base)
-{
-    struct variant *var = av_mallocz(sizeof(struct variant));
-    if (!var)
-        return NULL;
-    reset_packet(&var->pkt);
-    var->bandwidth = bandwidth;
-    ff_make_absolute_url(var->url, sizeof(var->url), base, url);
-    dynarray_add(&c->variants, &c->n_variants, var);
-    return var;
-}
-
-struct variant_info {
-    char bandwidth[20];
-};
-
-static void handle_variant_args(struct variant_info *info, const char *key,
-                                int key_len, char **dest, int *dest_len)
-{
-    if (!strncmp(key, "BANDWIDTH=", key_len)) {
-        *dest     =        info->bandwidth;
-        *dest_len = sizeof(info->bandwidth);
-    }
-}
-
-struct key_info {
-     char uri[MAX_URL_SIZE];
-     char method[10];
-     char iv[35];
-};
-
-static void handle_key_args(struct key_info *info, const char *key,
-                            int key_len, char **dest, int *dest_len)
-{
-    if (!strncmp(key, "METHOD=", key_len)) {
-        *dest     =        info->method;
-        *dest_len = sizeof(info->method);
-    } else if (!strncmp(key, "URI=", key_len)) {
-        *dest     =        info->uri;
-        *dest_len = sizeof(info->uri);
-    } else if (!strncmp(key, "IV=", key_len)) {
-        *dest     =        info->iv;
-        *dest_len = sizeof(info->iv);
-    }
-}
-
-static int parse_playlist(HLSContext *c, const char *url,
-                          struct variant *var, AVIOContext *in)
-{
-    int ret = 0, duration = 0, is_segment = 0, is_variant = 0, bandwidth = 0;
-    enum KeyType key_type = KEY_NONE;
-    uint8_t iv[16] = "";
-    int has_iv = 0;
-    char key[MAX_URL_SIZE] = "";
-    char line[1024];
-    const char *ptr;
-    int close_in = 0;
-
-    if (!in) {
-        AVDictionary *opts = NULL;
-        close_in = 1;
-        /* Some HLS servers dont like being sent the range header */
-        av_dict_set(&opts, "seekable", "0", 0);
-
-        // broker prior HTTP options that should be consistent across requests
-        av_dict_set(&opts, "user-agent", c->user_agent, 0);
-        av_dict_set(&opts, "cookies", c->cookies, 0);
-
-        ret = avio_open2(&in, url, AVIO_FLAG_READ,
-                         c->interrupt_callback, &opts);
-        av_dict_free(&opts);
-        if (ret < 0)
-            return ret;
-    }
-
-    read_chomp_line(in, line, sizeof(line));
-    if (strcmp(line, "#EXTM3U")) {
-        ret = AVERROR_INVALIDDATA;
-        goto fail;
-    }
-
-    if (var) {
-        free_segment_list(var);
-        var->finished = 0;
-    }
-    while (!url_feof(in)) {
-        read_chomp_line(in, line, sizeof(line));
-        if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
-            struct variant_info info = {{0}};
-            is_variant = 1;
-            ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_variant_args,
-                               &info);
-            bandwidth = atoi(info.bandwidth);
-        } else if (av_strstart(line, "#EXT-X-KEY:", &ptr)) {
-            struct key_info info = {{0}};
-            ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_key_args,
-                               &info);
-            key_type = KEY_NONE;
-            has_iv = 0;
-            if (!strcmp(info.method, "AES-128"))
-                key_type = KEY_AES_128;
-            if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
-                ff_hex_to_data(iv, info.iv + 2);
-                has_iv = 1;
-            }
-            av_strlcpy(key, info.uri, sizeof(key));
-        } else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
-            if (!var) {
-                var = new_variant(c, 0, url, NULL);
-                if (!var) {
-                    ret = AVERROR(ENOMEM);
-                    goto fail;
-                }
-            }
-            var->target_duration = atoi(ptr);
-        } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
-            if (!var) {
-                var = new_variant(c, 0, url, NULL);
-                if (!var) {
-                    ret = AVERROR(ENOMEM);
-                    goto fail;
-                }
-            }
-            var->start_seq_no = atoi(ptr);
-        } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
-            if (var)
-                var->finished = 1;
-        } else if (av_strstart(line, "#EXTINF:", &ptr)) {
-            is_segment = 1;
-            duration   = atoi(ptr);
-        } else if (av_strstart(line, "#", NULL)) {
-            continue;
-        } else if (line[0]) {
-            if (is_variant) {
-                if (!new_variant(c, bandwidth, line, url)) {
-                    ret = AVERROR(ENOMEM);
-                    goto fail;
-                }
-                is_variant = 0;
-                bandwidth  = 0;
-            }
-            if (is_segment) {
-                struct segment *seg;
-                if (!var) {
-                    var = new_variant(c, 0, url, NULL);
-                    if (!var) {
-                        ret = AVERROR(ENOMEM);
-                        goto fail;
-                    }
-                }
-                seg = av_malloc(sizeof(struct segment));
-                if (!seg) {
-                    ret = AVERROR(ENOMEM);
-                    goto fail;
-                }
-                seg->duration = duration;
-                seg->key_type = key_type;
-                if (has_iv) {
-                    memcpy(seg->iv, iv, sizeof(iv));
-                } else {
-                    int seq = var->start_seq_no + var->n_segments;
-                    memset(seg->iv, 0, sizeof(seg->iv));
-                    AV_WB32(seg->iv + 12, seq);
-                }
-                ff_make_absolute_url(seg->key, sizeof(seg->key), url, key);
-                ff_make_absolute_url(seg->url, sizeof(seg->url), url, line);
-                dynarray_add(&var->segments, &var->n_segments, seg);
-                is_segment = 0;
-            }
-        }
-    }
-    if (var)
-        var->last_load_time = av_gettime();
-
-fail:
-    if (close_in)
-        avio_close(in);
-    return ret;
-}
-
-static int open_input(HLSContext *c, struct variant *var)
-{
-    AVDictionary *opts = NULL;
-    int ret;
-    struct segment *seg = var->segments[var->cur_seq_no - var->start_seq_no];
-
-    // broker prior HTTP options that should be consistent across requests
-    av_dict_set(&opts, "user-agent", c->user_agent, 0);
-    av_dict_set(&opts, "cookies", c->cookies, 0);
-    av_dict_set(&opts, "seekable", "0", 0);
-
-    if (seg->key_type == KEY_NONE) {
-        ret = ffurl_open(&var->input, seg->url, AVIO_FLAG_READ,
-                          &var->parent->interrupt_callback, &opts);
-        goto cleanup;
-    } else if (seg->key_type == KEY_AES_128) {
-        char iv[33], key[33], url[MAX_URL_SIZE];
-        if (strcmp(seg->key, var->key_url)) {
-            URLContext *uc;
-            if (ffurl_open(&uc, seg->key, AVIO_FLAG_READ,
-                           &var->parent->interrupt_callback, &opts) == 0) {
-                if (ffurl_read_complete(uc, var->key, sizeof(var->key))
-                    != sizeof(var->key)) {
-                    av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
-                           seg->key);
-                }
-                ffurl_close(uc);
-            } else {
-                av_log(NULL, AV_LOG_ERROR, "Unable to open key file %s\n",
-                       seg->key);
-            }
-            av_strlcpy(var->key_url, seg->key, sizeof(var->key_url));
-        }
-        ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
-        ff_data_to_hex(key, var->key, sizeof(var->key), 0);
-        iv[32] = key[32] = '\0';
-        if (strstr(seg->url, "://"))
-            snprintf(url, sizeof(url), "crypto+%s", seg->url);
-        else
-            snprintf(url, sizeof(url), "crypto:%s", seg->url);
-        if ((ret = ffurl_alloc(&var->input, url, AVIO_FLAG_READ,
-                               &var->parent->interrupt_callback)) < 0)
-            goto cleanup;
-        av_opt_set(var->input->priv_data, "key", key, 0);
-        av_opt_set(var->input->priv_data, "iv", iv, 0);
-        /* Need to repopulate options */
-        av_dict_free(&opts);
-        av_dict_set(&opts, "seekable", "0", 0);
-        if ((ret = ffurl_connect(var->input, &opts)) < 0) {
-            ffurl_close(var->input);
-            var->input = NULL;
-            goto cleanup;
-        }
-        ret = 0;
-    }
-    else
-      ret = AVERROR(ENOSYS);
-
-cleanup:
-    av_dict_free(&opts);
-    return ret;
-}
-
-static int read_data(void *opaque, uint8_t *buf, int buf_size)
-{
-    struct variant *v = opaque;
-    HLSContext *c = v->parent->priv_data;
-    int ret, i;
-
-restart:
-    if (!v->input) {
-        /* If this is a live stream and the reload interval has elapsed since
-         * the last playlist reload, reload the variant playlists now. */
-        int64_t reload_interval = v->n_segments > 0 ?
-                                  v->segments[v->n_segments - 1]->duration :
-                                  v->target_duration;
-        reload_interval *= 1000000;
-
-reload:
-        if (!v->finished &&
-            av_gettime() - v->last_load_time >= reload_interval) {
-            if ((ret = parse_playlist(c, v->url, v, NULL)) < 0)
-                return ret;
-            /* If we need to reload the playlist again below (if
-             * there's still no more segments), switch to a reload
-             * interval of half the target duration. */
-            reload_interval = v->target_duration * 500000LL;
-        }
-        if (v->cur_seq_no < v->start_seq_no) {
-            av_log(NULL, AV_LOG_WARNING,
-                   "skipping %d segments ahead, expired from playlists\n",
-                   v->start_seq_no - v->cur_seq_no);
-            v->cur_seq_no = v->start_seq_no;
-        }
-        if (v->cur_seq_no >= v->start_seq_no + v->n_segments) {
-            if (v->finished)
-                return AVERROR_EOF;
-            while (av_gettime() - v->last_load_time < reload_interval) {
-                if (ff_check_interrupt(c->interrupt_callback))
-                    return AVERROR_EXIT;
-                av_usleep(100*1000);
-            }
-            /* Enough time has elapsed since the last reload */
-            goto reload;
-        }
-
-        ret = open_input(c, v);
-        if (ret < 0)
-            return ret;
-    }
-    ret = ffurl_read(v->input, buf, buf_size);
-    if (ret > 0)
-        return ret;
-    ffurl_close(v->input);
-    v->input = NULL;
-    v->cur_seq_no++;
-
-    c->end_of_segment = 1;
-    c->cur_seq_no = v->cur_seq_no;
-
-    if (v->ctx && v->ctx->nb_streams && v->parent->nb_streams >= v->stream_offset + v->ctx->nb_streams) {
-        v->needed = 0;
-        for (i = v->stream_offset; i < v->stream_offset + v->ctx->nb_streams;
-             i++) {
-            if (v->parent->streams[i]->discard < AVDISCARD_ALL)
-                v->needed = 1;
-        }
-    }
-    if (!v->needed) {
-        av_log(v->parent, AV_LOG_INFO, "No longer receiving variant %d\n",
-               v->index);
-        return AVERROR_EOF;
-    }
-    goto restart;
-}
-
-static int hls_read_header(AVFormatContext *s)
-{
-    URLContext *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb->opaque;
-    HLSContext *c = s->priv_data;
-    int ret = 0, i, j, stream_offset = 0;
-
-    c->interrupt_callback = &s->interrupt_callback;
-
-    // if the URL context is good, read important options we must broker later
-    if (u && u->prot->priv_data_class) {
-        // get the previous user agent & set back to null if string size is zero
-        av_freep(&c->user_agent);
-        av_opt_get(u->priv_data, "user-agent", 0, (uint8_t**)&(c->user_agent));
-        if (c->user_agent && !strlen(c->user_agent))
-            av_freep(&c->user_agent);
-
-        // get the previous cookies & set back to null if string size is zero
-        av_freep(&c->cookies);
-        av_opt_get(u->priv_data, "cookies", 0, (uint8_t**)&(c->cookies));
-        if (c->cookies && !strlen(c->cookies))
-            av_freep(&c->cookies);
-    }
-
-    if ((ret = parse_playlist(c, s->filename, NULL, s->pb)) < 0)
-        goto fail;
-
-    if (c->n_variants == 0) {
-        av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
-        ret = AVERROR_EOF;
-        goto fail;
-    }
-    /* If the playlist only contained variants, parse each individual
-     * variant playlist. */
-    if (c->n_variants > 1 || c->variants[0]->n_segments == 0) {
-        for (i = 0; i < c->n_variants; i++) {
-            struct variant *v = c->variants[i];
-            if ((ret = parse_playlist(c, v->url, v, NULL)) < 0)
-                goto fail;
-        }
-    }
-
-    if (c->variants[0]->n_segments == 0) {
-        av_log(NULL, AV_LOG_WARNING, "Empty playlist\n");
-        ret = AVERROR_EOF;
-        goto fail;
-    }
-
-    /* If this isn't a live stream, calculate the total duration of the
-     * stream. */
-    if (c->variants[0]->finished) {
-        int64_t duration = 0;
-        for (i = 0; i < c->variants[0]->n_segments; i++)
-            duration += c->variants[0]->segments[i]->duration;
-        s->duration = duration * AV_TIME_BASE;
-    }
-
-    /* Open the demuxer for each variant */
-    for (i = 0; i < c->n_variants; i++) {
-        struct variant *v = c->variants[i];
-        AVInputFormat *in_fmt = NULL;
-        char bitrate_str[20];
-        AVProgram *program = NULL;
-        if (v->n_segments == 0)
-            continue;
-
-        if (!(v->ctx = avformat_alloc_context())) {
-            ret = AVERROR(ENOMEM);
-            goto fail;
-        }
-
-        v->index  = i;
-        v->needed = 1;
-        v->parent = s;
-
-        /* If this is a live stream with more than 3 segments, start at the
-         * third last segment. */
-        v->cur_seq_no = v->start_seq_no;
-        if (!v->finished && v->n_segments > 3)
-            v->cur_seq_no = v->start_seq_no + v->n_segments - 3;
-
-        v->read_buffer = av_malloc(INITIAL_BUFFER_SIZE);
-        ffio_init_context(&v->pb, v->read_buffer, INITIAL_BUFFER_SIZE, 0, v,
-                          read_data, NULL, NULL);
-        v->pb.seekable = 0;
-        ret = av_probe_input_buffer(&v->pb, &in_fmt, v->segments[0]->url,
-                                    NULL, 0, 0);
-        if (ret < 0) {
-            /* Free the ctx - it isn't initialized properly at this point,
-             * so avformat_close_input shouldn't be called. If
-             * avformat_open_input fails below, it frees and zeros the
-             * context, so it doesn't need any special treatment like this. */
-            av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", v->segments[0]->url);
-            avformat_free_context(v->ctx);
-            v->ctx = NULL;
-            goto fail;
-        }
-        v->ctx->pb       = &v->pb;
-        ret = avformat_open_input(&v->ctx, v->segments[0]->url, in_fmt, NULL);
-        if (ret < 0)
-            goto fail;
-
-        v->stream_offset = stream_offset;
-        v->ctx->ctx_flags &= ~AVFMTCTX_NOHEADER;
-        ret = avformat_find_stream_info(v->ctx, NULL);
-        if (ret < 0)
-            goto fail;
-        snprintf(bitrate_str, sizeof(bitrate_str), "%d", v->bandwidth);
-
-        /* Create new AVprogram for variant i */
-        program = av_new_program(s, i);
-        if (!program)
-            goto fail;
-        av_dict_set(&program->metadata, "variant_bitrate", bitrate_str, 0);
-
-        /* Create new AVStreams for each stream in this variant */
-        for (j = 0; j < v->ctx->nb_streams; j++) {
-            AVStream *st = avformat_new_stream(s, NULL);
-            AVStream *ist = v->ctx->streams[j];
-            if (!st) {
-                ret = AVERROR(ENOMEM);
-                goto fail;
-            }
-            ff_program_add_stream_index(s, i, stream_offset + j);
-            st->id = i;
-            avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
-            avcodec_copy_context(st->codec, v->ctx->streams[j]->codec);
-            if (v->bandwidth)
-                av_dict_set(&st->metadata, "variant_bitrate", bitrate_str,
-                                 0);
-        }
-        stream_offset += v->ctx->nb_streams;
-    }
-
-    c->first_packet = 1;
-    c->first_timestamp = AV_NOPTS_VALUE;
-    c->seek_timestamp  = AV_NOPTS_VALUE;
-
-    return 0;
-fail:
-    free_variant_list(c);
-    return ret;
-}
-
-static int recheck_discard_flags(AVFormatContext *s, int first)
-{
-    HLSContext *c = s->priv_data;
-    int i, changed = 0;
-
-    /* Check if any new streams are needed */
-    for (i = 0; i < c->n_variants; i++)
-        c->variants[i]->cur_needed = 0;
-
-    for (i = 0; i < s->nb_streams; i++) {
-        AVStream *st = s->streams[i];
-        struct variant *var = c->variants[s->streams[i]->id];
-        if (st->discard < AVDISCARD_ALL)
-            var->cur_needed = 1;
-    }
-    for (i = 0; i < c->n_variants; i++) {
-        struct variant *v = c->variants[i];
-        if (v->cur_needed && !v->needed) {
-            v->needed = 1;
-            changed = 1;
-            v->cur_seq_no = c->cur_seq_no;
-            v->pb.eof_reached = 0;
-            av_log(s, AV_LOG_INFO, "Now receiving variant %d\n", i);
-        } else if (first && !v->cur_needed && v->needed) {
-            if (v->input)
-                ffurl_close(v->input);
-            v->input = NULL;
-            v->needed = 0;
-            changed = 1;
-            av_log(s, AV_LOG_INFO, "No longer receiving variant %d\n", i);
-        }
-    }
-    return changed;
-}
-
-static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
-    HLSContext *c = s->priv_data;
-    int ret, i, minvariant = -1;
-
-    if (c->first_packet) {
-        recheck_discard_flags(s, 1);
-        c->first_packet = 0;
-    }
-
-start:
-    c->end_of_segment = 0;
-    for (i = 0; i < c->n_variants; i++) {
-        struct variant *var = c->variants[i];
-        /* Make sure we've got one buffered packet from each open variant
-         * stream */
-        if (var->needed && !var->pkt.data) {
-            while (1) {
-                int64_t ts_diff;
-                AVStream *st;
-                ret = av_read_frame(var->ctx, &var->pkt);
-                if (ret < 0) {
-                    if (!url_feof(&var->pb) && ret != AVERROR_EOF)
-                        return ret;
-                    reset_packet(&var->pkt);
-                    break;
-                } else {
-                    if (c->first_timestamp == AV_NOPTS_VALUE)
-                        c->first_timestamp = var->pkt.dts;
-                }
-
-                if (c->seek_timestamp == AV_NOPTS_VALUE)
-                    break;
-
-                if (var->pkt.dts == AV_NOPTS_VALUE) {
-                    c->seek_timestamp = AV_NOPTS_VALUE;
-                    break;
-                }
-
-                st = var->ctx->streams[var->pkt.stream_index];
-                ts_diff = av_rescale_rnd(var->pkt.dts, AV_TIME_BASE,
-                                         st->time_base.den, AV_ROUND_DOWN) -
-                          c->seek_timestamp;
-                if (ts_diff >= 0 && (c->seek_flags  & AVSEEK_FLAG_ANY ||
-                                     var->pkt.flags & AV_PKT_FLAG_KEY)) {
-                    c->seek_timestamp = AV_NOPTS_VALUE;
-                    break;
-                }
-            }
-        }
-        /* Check if this stream has the packet with the lowest dts */
-        if (var->pkt.data) {
-            if(minvariant < 0) {
-                minvariant = i;
-            } else {
-                struct variant *minvar = c->variants[minvariant];
-                int64_t dts    =    var->pkt.dts;
-                int64_t mindts = minvar->pkt.dts;
-                AVStream *st   =    var->ctx->streams[   var->pkt.stream_index];
-                AVStream *minst= minvar->ctx->streams[minvar->pkt.stream_index];
-
-                if(   st->start_time != AV_NOPTS_VALUE)    dts -=    st->start_time;
-                if(minst->start_time != AV_NOPTS_VALUE) mindts -= minst->start_time;
-
-                if (av_compare_ts(dts, st->time_base, mindts, minst->time_base) < 0)
-                    minvariant = i;
-            }
-        }
-    }
-    if (c->end_of_segment) {
-        if (recheck_discard_flags(s, 0))
-            goto start;
-    }
-    /* If we got a packet, return it */
-    if (minvariant >= 0) {
-        *pkt = c->variants[minvariant]->pkt;
-        pkt->stream_index += c->variants[minvariant]->stream_offset;
-        reset_packet(&c->variants[minvariant]->pkt);
-        return 0;
-    }
-    return AVERROR_EOF;
-}
-
-static int hls_close(AVFormatContext *s)
-{
-    HLSContext *c = s->priv_data;
-
-    free_variant_list(c);
-    return 0;
-}
-
-static int hls_read_seek(AVFormatContext *s, int stream_index,
-                               int64_t timestamp, int flags)
-{
-    HLSContext *c = s->priv_data;
-    int i, j, ret;
-
-    if ((flags & AVSEEK_FLAG_BYTE) || !c->variants[0]->finished)
-        return AVERROR(ENOSYS);
-
-    c->seek_flags     = flags;
-    c->seek_timestamp = stream_index < 0 ? timestamp :
-                        av_rescale_rnd(timestamp, AV_TIME_BASE,
-                                       s->streams[stream_index]->time_base.den,
-                                       flags & AVSEEK_FLAG_BACKWARD ?
-                                       AV_ROUND_DOWN : AV_ROUND_UP);
-    timestamp = av_rescale_rnd(timestamp, 1, stream_index >= 0 ?
-                               s->streams[stream_index]->time_base.den :
-                               AV_TIME_BASE, flags & AVSEEK_FLAG_BACKWARD ?
-                               AV_ROUND_DOWN : AV_ROUND_UP);
-    if (s->duration < c->seek_timestamp) {
-        c->seek_timestamp = AV_NOPTS_VALUE;
-        return AVERROR(EIO);
-    }
-
-    ret = AVERROR(EIO);
-    for (i = 0; i < c->n_variants; i++) {
-        /* Reset reading */
-        struct variant *var = c->variants[i];
-        int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ? 0 :
-                      av_rescale_rnd(c->first_timestamp, 1, stream_index >= 0 ?
-                               s->streams[stream_index]->time_base.den :
-                               AV_TIME_BASE, flags & AVSEEK_FLAG_BACKWARD ?
-                               AV_ROUND_DOWN : AV_ROUND_UP);
-         if (var->input) {
-            ffurl_close(var->input);
-            var->input = NULL;
-        }
-        av_free_packet(&var->pkt);
-        reset_packet(&var->pkt);
-        var->pb.eof_reached = 0;
-        /* Clear any buffered data */
-        var->pb.buf_end = var->pb.buf_ptr = var->pb.buffer;
-        /* Reset the pos, to let the mpegts demuxer know we've seeked. */
-        var->pb.pos = 0;
-
-        /* Locate the segment that contains the target timestamp */
-        for (j = 0; j < var->n_segments; j++) {
-            if (timestamp >= pos &&
-                timestamp < pos + var->segments[j]->duration) {
-                var->cur_seq_no = var->start_seq_no + j;
-                ret = 0;
-                break;
-            }
-            pos += var->segments[j]->duration;
-        }
-        if (ret)
-            c->seek_timestamp = AV_NOPTS_VALUE;
-    }
-    return ret;
-}
-
-static int hls_probe(AVProbeData *p)
-{
-    /* Require #EXTM3U at the start, and either one of the ones below
-     * somewhere for a proper match. */
-    if (strncmp(p->buf, "#EXTM3U", 7))
-        return 0;
-    if (strstr(p->buf, "#EXT-X-STREAM-INF:")     ||
-        strstr(p->buf, "#EXT-X-TARGETDURATION:") ||
-        strstr(p->buf, "#EXT-X-MEDIA-SEQUENCE:"))
-        return AVPROBE_SCORE_MAX;
-    return 0;
-}
-
-AVInputFormat ff_hls_demuxer = {
-    .name           = "hls,applehttp",
-    .long_name      = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
-    .priv_data_size = sizeof(HLSContext),
-    .read_probe     = hls_probe,
-    .read_header    = hls_read_header,
-    .read_packet    = hls_read_packet,
-    .read_close     = hls_close,
-    .read_seek      = hls_read_seek,
-};