636 lines
21 KiB
C
636 lines
21 KiB
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 "libavutil/opt.h"
|
||
|
|
#include "avformat.h"
|
||
|
|
#include "avio_internal.h"
|
||
|
|
#include "internal.h"
|
||
|
|
#include "url.h"
|
||
|
|
#include "version.h"
|
||
|
|
#include <stdbool.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.
|
||
|
|
*/
|
||
|
|
enum KeyType {
|
||
|
|
KEY_NONE,
|
||
|
|
KEY_AES_128,
|
||
|
|
KEY_SAMPLE_AES
|
||
|
|
};
|
||
|
|
|
||
|
|
struct key_info {
|
||
|
|
char uri[MAX_URL_SIZE];
|
||
|
|
char method[11];
|
||
|
|
char iv[35];
|
||
|
|
};
|
||
|
|
|
||
|
|
struct segment {
|
||
|
|
int64_t duration;
|
||
|
|
char url[MAX_URL_SIZE];
|
||
|
|
char * seg_kurl;
|
||
|
|
uint8_t seg_iv[33];
|
||
|
|
};
|
||
|
|
|
||
|
|
struct variant {
|
||
|
|
int bandwidth;
|
||
|
|
char url[MAX_URL_SIZE];
|
||
|
|
};
|
||
|
|
|
||
|
|
typedef struct HLSContext {
|
||
|
|
const AVClass *class;
|
||
|
|
char playlisturl[MAX_URL_SIZE];
|
||
|
|
int64_t target_duration;
|
||
|
|
int start_seq_no;
|
||
|
|
int finished;
|
||
|
|
int n_segments;
|
||
|
|
struct segment **segments;
|
||
|
|
int n_variants;
|
||
|
|
struct variant **variants;
|
||
|
|
int cur_seq_no;
|
||
|
|
int cur_seq_size;
|
||
|
|
int64_t durations;
|
||
|
|
char* cur_kurl;
|
||
|
|
uint8_t *cur_iv;
|
||
|
|
int cur_iv_len;
|
||
|
|
URLContext *seg_hd;
|
||
|
|
int64_t last_load_time;
|
||
|
|
int is_encrypted;
|
||
|
|
|
||
|
|
int index_variants;
|
||
|
|
int mReadByte;
|
||
|
|
int64_t mReadTime;
|
||
|
|
int64_t mBandWidth[3];
|
||
|
|
int bandwidth_index;
|
||
|
|
int reconnect;
|
||
|
|
} HLSContext;
|
||
|
|
|
||
|
|
static const AVOption hls_options[] = {
|
||
|
|
{"cur_seq_no", "current segment index number", offsetof(HLSContext, cur_seq_no), AV_OPT_TYPE_INT,{.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_EXPORT},
|
||
|
|
{"cur_seq_size", "current segment size", offsetof(HLSContext, cur_seq_size), AV_OPT_TYPE_INT,{.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_EXPORT},
|
||
|
|
{"cur_kurl", "current key url", offsetof(HLSContext,cur_kurl), AV_OPT_TYPE_STRING, {.str=""}},
|
||
|
|
{"cur_iv", "current iv", offsetof(HLSContext,cur_iv), AV_OPT_TYPE_BINARY, .flags = AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_ENCODING_PARAM },
|
||
|
|
|
||
|
|
{"durations", "durations", offsetof(HLSContext,durations), AV_OPT_TYPE_INT64,{.i64 = 0}, 0, INT64_MAX, AV_OPT_FLAG_EXPORT},
|
||
|
|
{"reconnect", "auto reconnect after ts-segment disconnect before EOF", offsetof(HLSContext,reconnect), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
|
||
|
|
|
||
|
|
{ NULL },
|
||
|
|
};
|
||
|
|
|
||
|
|
static const AVClass hls_context_class = {
|
||
|
|
.class_name = "hls protocol",
|
||
|
|
.item_name = av_default_item_name,
|
||
|
|
.option = hls_options,
|
||
|
|
.version = LIBAVUTIL_VERSION_INT,
|
||
|
|
};
|
||
|
|
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++) {
|
||
|
|
if (s->segments[i]->seg_kurl)
|
||
|
|
{
|
||
|
|
av_free (s->segments[i]->seg_kurl);
|
||
|
|
s->segments[i]->seg_kurl = NULL;
|
||
|
|
}
|
||
|
|
av_freep(&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_freep(&s->variants[i]);
|
||
|
|
av_freep(&s->variants);
|
||
|
|
s->n_variants = 0;
|
||
|
|
if (s->cur_kurl)
|
||
|
|
{
|
||
|
|
av_free(s->cur_kurl);
|
||
|
|
s->cur_kurl = NULL;
|
||
|
|
}
|
||
|
|
if (s->cur_iv)
|
||
|
|
{
|
||
|
|
av_free(s->cur_iv);
|
||
|
|
s->cur_iv = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
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 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 void sortByBandwidth(HLSContext *s)
|
||
|
|
{
|
||
|
|
int i, j;
|
||
|
|
struct variant *tmp;
|
||
|
|
for (i = 0; i < s->n_variants - 1; i++) {
|
||
|
|
for (j = i+1; j < s->n_variants; j++) {
|
||
|
|
if (s->variants[i]->bandwidth > s->variants[j]->bandwidth) {
|
||
|
|
|
||
|
|
tmp = s->variants[j];
|
||
|
|
s->variants[j] = s->variants[i];
|
||
|
|
s->variants[i] = tmp;
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
for (i = 0; i < s->n_variants; i++) {
|
||
|
|
av_log(NULL, AV_LOG_ERROR, "[%s %d]bandwidth=%d\n", __FUNCTION__,__LINE__,s->variants[i]->bandwidth);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static int parse_playlist(URLContext *h, const char *url,uint64_t *estbw)
|
||
|
|
{
|
||
|
|
HLSContext *s = h->priv_data;
|
||
|
|
AVIOContext *in;
|
||
|
|
int ret = 0, is_segment = 0, is_variant = 0, bandwidth = 0;
|
||
|
|
int64_t duration = 0;
|
||
|
|
char line[1024];
|
||
|
|
const char *ptr;
|
||
|
|
enum KeyType key_type = KEY_NONE;
|
||
|
|
uint8_t iv[16] = "";
|
||
|
|
int has_iv = 0;
|
||
|
|
char * kurl = NULL;
|
||
|
|
uint8_t kiv[33]= {0};
|
||
|
|
|
||
|
|
int playlist_size = 0;
|
||
|
|
int64_t start_time = av_gettime_relative();
|
||
|
|
int64_t end_time = 0;
|
||
|
|
|
||
|
|
if ((ret = ffio_open_whitelist(&in, url, AVIO_FLAG_READ,
|
||
|
|
&h->interrupt_callback, NULL,
|
||
|
|
h->protocol_whitelist, h->protocol_blacklist)) < 0)
|
||
|
|
return ret;
|
||
|
|
playlist_size = read_chomp_line(in, line, sizeof(line));
|
||
|
|
if (strcmp(line, "#EXTM3U")) {
|
||
|
|
ret = AVERROR_INVALIDDATA;
|
||
|
|
goto fail;
|
||
|
|
}
|
||
|
|
|
||
|
|
free_segment_list(s);
|
||
|
|
s->finished = 0;
|
||
|
|
while (!avio_feof(in)) {
|
||
|
|
playlist_size += read_chomp_line(in, line, sizeof(line));
|
||
|
|
av_log(NULL, AV_LOG_ERROR, "%s\n",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}};
|
||
|
|
s->is_encrypted = 1;
|
||
|
|
ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_key_args,
|
||
|
|
&info);
|
||
|
|
has_iv = 0;
|
||
|
|
if (!strcmp(info.method, "AES-128"))
|
||
|
|
key_type = KEY_AES_128;
|
||
|
|
if (!strcmp(info.method, "SAMPLE-AES"))
|
||
|
|
key_type = KEY_SAMPLE_AES;
|
||
|
|
if (!strncmp(info.iv, "0x", 2) || !strncmp(info.iv, "0X", 2)) {
|
||
|
|
ff_hex_to_data(iv, info.iv + 2);
|
||
|
|
has_iv = 1;
|
||
|
|
}
|
||
|
|
kurl = av_strdup (info.uri);
|
||
|
|
memcpy(kiv,info.iv+2,32);
|
||
|
|
} else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
|
||
|
|
s->target_duration = atoi(ptr) * AV_TIME_BASE;
|
||
|
|
} 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 = atof(ptr) * AV_TIME_BASE;
|
||
|
|
} 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;
|
||
|
|
if (key_type != KEY_NONE)
|
||
|
|
{
|
||
|
|
seg->seg_kurl = av_strdup(kurl);
|
||
|
|
memcpy(seg->seg_iv,kiv,32);
|
||
|
|
}
|
||
|
|
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_relative();
|
||
|
|
end_time = av_gettime_relative();
|
||
|
|
if (end_time != start_time)
|
||
|
|
{
|
||
|
|
*estbw = ((uint64_t)(8 * playlist_size * 1000) /((end_time - start_time)/1000));
|
||
|
|
av_log(NULL, AV_LOG_WARNING, "start_time %lld end %lld playlist_size %d *estbw %lld\n",start_time,end_time,playlist_size,*estbw);
|
||
|
|
}
|
||
|
|
fail:
|
||
|
|
if (kurl)
|
||
|
|
{
|
||
|
|
av_free (kurl);
|
||
|
|
kurl = NULL;
|
||
|
|
}
|
||
|
|
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);
|
||
|
|
uint64_t bw = 0;
|
||
|
|
if ((ret = parse_playlist(h, s->playlisturl, &bw)) < 0)
|
||
|
|
goto fail;
|
||
|
|
|
||
|
|
if (s->n_segments == 0 && s->n_variants > 0) {
|
||
|
|
int max_bandwidth = 0, maxvar = -1;
|
||
|
|
s->index_variants = 0;
|
||
|
|
char value[92] = {0};
|
||
|
|
|
||
|
|
bw = 0;
|
||
|
|
for (i = 0; i < s->n_variants; i++) {
|
||
|
|
if (s->variants[i]->bandwidth <= bw) {
|
||
|
|
s->index_variants = i;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
av_strlcpy(s->playlisturl, s->variants[s->index_variants]->url,
|
||
|
|
sizeof(s->playlisturl));
|
||
|
|
if ((ret = parse_playlist(h, s->playlisturl, &bw)) < 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;
|
||
|
|
if (s->finished)
|
||
|
|
{
|
||
|
|
for (i = 0 ; i < s->n_segments ; i++)
|
||
|
|
{
|
||
|
|
s->durations += s->segments[i]->duration;
|
||
|
|
}
|
||
|
|
//if (av_opt_set_int(s, "durations", s->durations, 0) < 0)
|
||
|
|
// av_log(s, AV_LOG_ERROR, "set s->duration error!\n");
|
||
|
|
}
|
||
|
|
memset(s->mBandWidth, 0, sizeof(s->mBandWidth));
|
||
|
|
s->bandwidth_index = 0;
|
||
|
|
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;
|
||
|
|
int64_t cur_no = 0;
|
||
|
|
int64_t seg_size = 0;
|
||
|
|
int64_t bw = 0 ;
|
||
|
|
int64_t bandwidth = 0 ;
|
||
|
|
start:
|
||
|
|
if (s->seg_hd) {
|
||
|
|
int64_t start = av_gettime_relative();
|
||
|
|
ret = ffurl_read(s->seg_hd, buf, size);
|
||
|
|
int64_t delay = av_gettime_relative() - start;
|
||
|
|
|
||
|
|
if (s->start_seq_no && (s->cur_seq_no >= s->start_seq_no))
|
||
|
|
cur_no = s->cur_seq_no - s->start_seq_no ;
|
||
|
|
else
|
||
|
|
cur_no = s->cur_seq_no;
|
||
|
|
|
||
|
|
cur_no = s->cur_seq_no;
|
||
|
|
//if (av_opt_set_int(s, "cur_seq_no", cur_no, 0) < 0)
|
||
|
|
// av_log(s, AV_LOG_WARNING, "set seg_no error!\n");
|
||
|
|
|
||
|
|
if (av_opt_get_int(s->seg_hd->priv_data, "http_file_size", 0, &seg_size) < 0)
|
||
|
|
{
|
||
|
|
av_log(s, AV_LOG_WARNING, "get http_file_size fail\n");
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
s->cur_seq_size = seg_size;
|
||
|
|
//if (av_opt_set_int(s, "cur_seq_size", seg_size, 0) < 0)
|
||
|
|
// av_log(s, AV_LOG_WARNING, "set seg_size error!\n");
|
||
|
|
}
|
||
|
|
if (s->is_encrypted)
|
||
|
|
{
|
||
|
|
// memcpy(s->cur_iv , s->segments[cur_no]->seg_iv, 33);
|
||
|
|
// memcpy(s->cur_kurl , s->segments[cur_no]->seg_kurl, strlen(s->segments[cur_no]->seg_kurl)+1);
|
||
|
|
if (av_opt_set(s, "cur_iv", s->segments[cur_no]->seg_iv, 0) < 0)
|
||
|
|
{
|
||
|
|
av_log(s, AV_LOG_WARNING, "set cur_iv error\n");
|
||
|
|
}
|
||
|
|
if ((s->n_segments > 0) && av_opt_set(s, "cur_kurl", s->segments[cur_no]->seg_kurl, 0) < 0)
|
||
|
|
{
|
||
|
|
av_log(s, AV_LOG_WARNING, "set cur_kurl error!\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (ret > 0) {
|
||
|
|
/*av_log(s, AV_LOG_ERROR, "[%s %d] size=%d delay=%lld\n",
|
||
|
|
__FUNCTION__, __LINE__, ret, delay);
|
||
|
|
*/
|
||
|
|
s->mReadTime += delay;
|
||
|
|
s->mReadByte += ret;
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (s->seg_hd) {
|
||
|
|
if (s->n_variants > 0) {
|
||
|
|
bandwidth = (int64_t)s->mReadByte * 8E6 / s->mReadTime;
|
||
|
|
av_log(s, AV_LOG_ERROR, "[%s %d] %d bandwidth=%lld curbw=%d size=%d delay=%lld ret=%d\n",
|
||
|
|
__FUNCTION__, __LINE__, s->cur_seq_size, bandwidth, s->variants[s->index_variants]->bandwidth, s->mReadByte, s->mReadTime, ret);
|
||
|
|
s->mReadByte = 0;
|
||
|
|
s->mReadTime = 0;
|
||
|
|
if (s->bandwidth_index ==3) {
|
||
|
|
s->bandwidth_index = 0;
|
||
|
|
}
|
||
|
|
if (bandwidth > 0)
|
||
|
|
s->mBandWidth[s->bandwidth_index++] = bandwidth;
|
||
|
|
}
|
||
|
|
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;
|
||
|
|
|
||
|
|
int i;
|
||
|
|
int needSwitch = 0;
|
||
|
|
int temp;
|
||
|
|
int64_t minEstimate = -1, maxEstimate = -1;
|
||
|
|
if (s->n_variants > 0) {
|
||
|
|
for (i=0; i<3; i++) {
|
||
|
|
if (minEstimate < 0 || minEstimate > s->mBandWidth[i]) {
|
||
|
|
minEstimate = s->mBandWidth[i];
|
||
|
|
}
|
||
|
|
if (maxEstimate < 0 || maxEstimate < s->mBandWidth[i]) {
|
||
|
|
maxEstimate = s->mBandWidth[i];
|
||
|
|
}
|
||
|
|
av_log(NULL, AV_LOG_ERROR, "estimate=%lld\n",s->mBandWidth[i]);
|
||
|
|
}
|
||
|
|
bool mIsStable = (maxEstimate <= minEstimate * 4 / 3)
|
||
|
|
&& bandwidth > minEstimate * 7 / 10;
|
||
|
|
av_log(NULL, AV_LOG_ERROR, "minEstimate=%lld maxEstimate=%lld stable=%d\n",
|
||
|
|
minEstimate, maxEstimate, mIsStable);
|
||
|
|
temp = s->index_variants;
|
||
|
|
if ((bandwidth < s->variants[s->index_variants]->bandwidth)) {
|
||
|
|
for (i = 0; i < s->n_variants; i++) {
|
||
|
|
if (s->variants[i]->bandwidth < bandwidth) {
|
||
|
|
temp = i;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (temp != s->index_variants) {
|
||
|
|
s->index_variants = temp;
|
||
|
|
av_log(s, AV_LOG_ERROR, "switch down index=%d\n",s->index_variants);
|
||
|
|
needSwitch = 1;
|
||
|
|
av_strlcpy(s->playlisturl, s->variants[s->index_variants]->url,
|
||
|
|
sizeof(s->playlisturl));
|
||
|
|
}
|
||
|
|
} else if (bandwidth > 13*s->variants[s->index_variants]->bandwidth/10) {
|
||
|
|
for (i = 0; i < s->n_variants; i++) {
|
||
|
|
av_log(NULL, AV_LOG_ERROR, "bandwidth=%lld s->variants[i]->bandwidth=%d\n",
|
||
|
|
bandwidth, s->variants[i]->bandwidth);
|
||
|
|
if ((int64_t)s->variants[i]->bandwidth < bandwidth) {
|
||
|
|
temp = i;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (temp != s->index_variants && (mIsStable || minEstimate == 0)) {
|
||
|
|
s->index_variants = temp;
|
||
|
|
av_log(s, AV_LOG_ERROR, "switch up index=%d\n", s->index_variants);
|
||
|
|
needSwitch = 1;
|
||
|
|
av_strlcpy(s->playlisturl, s->variants[s->index_variants]->url,
|
||
|
|
sizeof(s->playlisturl));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
retry:
|
||
|
|
if (s->finished && needSwitch)
|
||
|
|
if ((ret = parse_playlist(h, s->playlisturl, &bw)) < 0)
|
||
|
|
return ret;
|
||
|
|
if (!s->finished) {
|
||
|
|
int64_t now = av_gettime_relative();
|
||
|
|
if (now - s->last_load_time >= reload_interval || needSwitch) {
|
||
|
|
if ((ret = parse_playlist(h, s->playlisturl, &bw)) < 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 / 2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
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_relative() - 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 \ncur_no=%lld cur_seq_no=%d\n", url, cur_no, s->cur_seq_no);
|
||
|
|
AVDictionary *opts = NULL;
|
||
|
|
char tmpchar[2] = {0};
|
||
|
|
memset(tmpchar, 0, sizeof(tmpchar));
|
||
|
|
sprintf(tmpchar, "%d", s->reconnect);
|
||
|
|
av_dict_set(&opts, "reconnect", tmpchar, 0);
|
||
|
|
ret = ffurl_open_whitelist(&s->seg_hd, url, AVIO_FLAG_READ,
|
||
|
|
&h->interrupt_callback, &opts,
|
||
|
|
h->protocol_whitelist, h->protocol_blacklist, h);
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
static int64_t hls_seek_ext(URLContext *h, int64_t off, int whence)
|
||
|
|
{ /*add for drmplayer, off is segment idx (0 or start segment) OR timeUs*/
|
||
|
|
int i = 0;
|
||
|
|
HLSContext *s = h->priv_data;
|
||
|
|
av_log(h, AV_LOG_WARNING, "hls_seek_ext enter cur_seq_no %d start_seq_no %d off 0x%llx s->durations %lld \n", s->cur_seq_no,s->start_seq_no,off,s->durations);
|
||
|
|
if (whence == AVSEEK_SIZE) {
|
||
|
|
av_log(h, AV_LOG_WARNING, "hls_seek_ext can not get avio_size\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
if ((off >= s->start_seq_no && off <= s->durations) || s->start_seq_no)
|
||
|
|
{
|
||
|
|
if (s->seg_hd)
|
||
|
|
{
|
||
|
|
ffurl_close(s->seg_hd);
|
||
|
|
s->seg_hd = NULL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if ((off == 0) || (s->n_segments == 1))
|
||
|
|
{
|
||
|
|
if (s->finished)
|
||
|
|
s->cur_seq_no = s->start_seq_no;
|
||
|
|
}
|
||
|
|
else if ((off > s->start_seq_no) && (off < s->durations))
|
||
|
|
{
|
||
|
|
int64_t tmpdurations = s->durations;
|
||
|
|
for (i = s->n_segments -1; i >= 0; i--)
|
||
|
|
{
|
||
|
|
tmpdurations -= s->segments[i]->duration;
|
||
|
|
if (tmpdurations < off)
|
||
|
|
{
|
||
|
|
s->cur_seq_no = i + s->start_seq_no;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
av_log(h, AV_LOG_WARNING, "hls_seek_ext cur_seq_no %d start_seq_no %d off 0x%llx \n", s->cur_seq_no,s->start_seq_no,off);
|
||
|
|
|
||
|
|
|
||
|
|
return off;
|
||
|
|
}
|
||
|
|
const URLProtocol ff_hls_protocol = {
|
||
|
|
.name = "hls",
|
||
|
|
.url_open = hls_open,
|
||
|
|
.url_seek = hls_seek_ext,
|
||
|
|
.url_read = hls_read,
|
||
|
|
.url_close = hls_close,
|
||
|
|
.flags = URL_PROTOCOL_FLAG_NESTED_SCHEME,
|
||
|
|
.priv_data_size = sizeof(HLSContext),
|
||
|
|
.priv_data_class = &hls_context_class
|
||
|
|
};
|