不少人都在找FFmpeg中是否有hls(m3u8)解析的源码，其实是有的。就是ffmpeg/libavformat/hlsproto.c，它依赖的文件也在那个目录中。

如果要是单纯想解析HLS的话，建议参考，这是一个http、hls、rtmp集合在一起的压测工具，里面的代码更专一，代码量也不大。

下面是ffmpeg/libavformat/hlsproto.c

/* * Apple HTTP Live Streaming Protocol Handler * 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 Protocol Handler * http://tools.ietf.org/html/draft-pantos-http-live-streaming */#include "libavutil/avstring.h"#include "libavutil/time.h"#include "avformat.h"#include "internal.h"#include "url.h"#include "version.h"/* * 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. */struct segment {    int duration;    char url[MAX_URL_SIZE];};struct variant {    int bandwidth;    char url[MAX_URL_SIZE];};typedef struct HLSContext {    char playlisturl[MAX_URL_SIZE];    int target_duration;    int start_seq_no;    int finished;    int n_segments;    struct segment **segments;    int n_variants;    struct variant **variants;    int cur_seq_no;    URLContext *seg_hd;    int64_t last_load_time;} 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(HLSContext *s){    int i;    for (i = 0; i < s->n_segments; i++)        av_free(s->segments[i]);    av_freep(&s->segments);    s->n_segments = 0;}static void free_variant_list(HLSContext *s){    int i;    for (i = 0; i < s->n_variants; i++)        av_free(s->variants[i]);    av_freep(&s->variants);    s->n_variants = 0;}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);    }}static int parse_playlist(URLContext *h, const char *url){    HLSContext *s = h->priv_data;    AVIOContext *in;    int ret = 0, duration = 0, is_segment = 0, is_variant = 0, bandwidth = 0;    char line[1024];    const char *ptr;    if ((ret = avio_open2(&in, url, AVIO_FLAG_READ,                          &h->interrupt_callback, NULL)) < 0)        return ret;    read_chomp_line(in, line, sizeof(line));    if (strcmp(line, "#EXTM3U"))        return AVERROR_INVALIDDATA;    free_segment_list(s);    s->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-TARGETDURATION:", &ptr)) {            s->target_duration = atoi(ptr);        } else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {            s->start_seq_no = atoi(ptr);        } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {            s->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_segment) {                struct segment *seg = av_malloc(sizeof(struct segment));                if (!seg) {                    ret = AVERROR(ENOMEM);                    goto fail;                }                seg->duration = duration;                ff_make_absolute_url(seg->url, sizeof(seg->url), url, line);                dynarray_add(&s->segments, &s->n_segments, seg);                is_segment = 0;            } else if (is_variant) {                struct variant *var = av_malloc(sizeof(struct variant));                if (!var) {                    ret = AVERROR(ENOMEM);                    goto fail;                }                var->bandwidth = bandwidth;                ff_make_absolute_url(var->url, sizeof(var->url), url, line);                dynarray_add(&s->variants, &s->n_variants, var);                is_variant = 0;            }        }    }    s->last_load_time = av_gettime();fail:    avio_close(in);    return ret;}static int hls_close(URLContext *h){    HLSContext *s = h->priv_data;    free_segment_list(s);    free_variant_list(s);    ffurl_close(s->seg_hd);    return 0;}static int hls_open(URLContext *h, const char *uri, int flags){    HLSContext *s = h->priv_data;    int ret, i;    const char *nested_url;    if (flags & AVIO_FLAG_WRITE)        return AVERROR(ENOSYS);    h->is_streamed = 1;    if (av_strstart(uri, "hls+", &nested_url)) {        av_strlcpy(s->playlisturl, nested_url, sizeof(s->playlisturl));    } else if (av_strstart(uri, "hls://", &nested_url)) {        av_log(h, AV_LOG_ERROR,               "No nested protocol specified. Specify e.g. hls+http://%s\n",               nested_url);        ret = AVERROR(EINVAL);        goto fail;    } else {        av_log(h, AV_LOG_ERROR, "Unsupported url %s\n", uri);        ret = AVERROR(EINVAL);        goto fail;    }    av_log(h, AV_LOG_WARNING,           "Using the hls protocol is discouraged, please try using the "           "hls demuxer instead. The hls demuxer should be more complete "           "and work as well as the protocol implementation. (If not, "           "please report it.) To use the demuxer, simply use %s as url.\n",           s->playlisturl);    if ((ret = parse_playlist(h, s->playlisturl)) < 0)        goto fail;    if (s->n_segments == 0 && s->n_variants > 0) {        int max_bandwidth = 0, maxvar = -1;        for (i = 0; i < s->n_variants; i++) {            if (s->variants[i]->bandwidth > max_bandwidth || i == 0) {                max_bandwidth = s->variants[i]->bandwidth;                maxvar = i;            }        }        av_strlcpy(s->playlisturl, s->variants[maxvar]->url,                   sizeof(s->playlisturl));        if ((ret = parse_playlist(h, s->playlisturl)) < 0)            goto fail;    }    if (s->n_segments == 0) {        av_log(h, AV_LOG_WARNING, "Empty playlist\n");        ret = AVERROR(EIO);        goto fail;    }    s->cur_seq_no = s->start_seq_no;    if (!s->finished && s->n_segments >= 3)        s->cur_seq_no = s->start_seq_no + s->n_segments - 3;    return 0;fail:    hls_close(h);    return ret;}static int hls_read(URLContext *h, uint8_t *buf, int size){    HLSContext *s = h->priv_data;    const char *url;    int ret;    int64_t reload_interval;start:    if (s->seg_hd) {        ret = ffurl_read(s->seg_hd, buf, size);        if (ret > 0)            return ret;    }    if (s->seg_hd) {        ffurl_close(s->seg_hd);        s->seg_hd = NULL;        s->cur_seq_no++;    }    reload_interval = s->n_segments > 0 ?                      s->segments[s->n_segments - 1]->duration :                      s->target_duration;    reload_interval *= 1000000;retry:    if (!s->finished) {        int64_t now = av_gettime();        if (now - s->last_load_time >= reload_interval) {            if ((ret = parse_playlist(h, s->playlisturl)) < 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 = s->target_duration * 500000LL;        }    }    if (s->cur_seq_no < s->start_seq_no) {        av_log(h, AV_LOG_WARNING,               "skipping %d segments ahead, expired from playlist\n",               s->start_seq_no - s->cur_seq_no);        s->cur_seq_no = s->start_seq_no;    }    if (s->cur_seq_no - s->start_seq_no >= s->n_segments) {        if (s->finished)            return AVERROR_EOF;        while (av_gettime() - s->last_load_time < reload_interval) {            if (ff_check_interrupt(&h->interrupt_callback))                return AVERROR_EXIT;            av_usleep(100*1000);        }        goto retry;    }    url = s->segments[s->cur_seq_no - s->start_seq_no]->url,    av_log(h, AV_LOG_DEBUG, "opening %s\n", url);    ret = ffurl_open(&s->seg_hd, url, AVIO_FLAG_READ,                     &h->interrupt_callback, NULL);    if (ret < 0) {        if (ff_check_interrupt(&h->interrupt_callback))            return AVERROR_EXIT;        av_log(h, AV_LOG_WARNING, "Unable to open %s\n", url);        s->cur_seq_no++;        goto retry;    }    goto start;}URLProtocol ff_hls_protocol = {    .name           = "hls",    .url_open       = hls_open,    .url_read       = hls_read,    .url_close      = hls_close,    .flags          = URL_PROTOCOL_FLAG_NESTED_SCHEME,    .priv_data_size = sizeof(HLSContext),};

自己用的到，先做个记录，到时候整理吧。