2010-08-19 14:54:37 +00:00
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/*
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* Apple HTTP Live Streaming demuxer
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* Copyright (c) 2010 Martin Storsjo
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*
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2011-03-18 17:35:10 +00:00
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* This file is part of Libav.
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2010-08-19 14:54:37 +00:00
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*
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2011-03-18 17:35:10 +00:00
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* Libav is free software; you can redistribute it and/or
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2010-08-19 14:54:37 +00:00
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* modify it under the terms of the GNU Lesser General Public
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* License 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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2011-03-18 17:35:10 +00:00
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* Libav is distributed in the hope that it will be useful,
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2010-08-19 14:54:37 +00:00
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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 GNU
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* 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
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2011-03-18 17:35:10 +00:00
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* License along with Libav; if not, write to the Free Software
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2010-08-19 14:54:37 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Apple HTTP Live Streaming demuxer
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* http://tools.ietf.org/html/draft-pantos-http-live-streaming
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*/
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2010-08-19 17:07:12 +00:00
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#define _XOPEN_SOURCE 600
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2010-08-19 14:54:37 +00:00
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#include "libavutil/avstring.h"
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#include "avformat.h"
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#include "internal.h"
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#include <unistd.h>
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2011-03-20 22:21:56 +00:00
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#include "avio_internal.h"
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2011-04-04 18:40:38 +00:00
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#include "url.h"
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2011-03-20 22:21:56 +00:00
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#define INITIAL_BUFFER_SIZE 32768
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2010-08-19 14:54:37 +00:00
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/*
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* An apple http stream consists of a playlist with media segment files,
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* played sequentially. There may be several playlists with the same
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* video content, in different bandwidth variants, that are played in
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* parallel (preferrably only one bandwidth variant at a time). In this case,
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* the user supplied the url to a main playlist that only lists the variant
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* playlists.
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*
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* If the main playlist doesn't point at any variants, we still create
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* one anonymous toplevel variant for this, to maintain the structure.
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*/
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struct segment {
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int duration;
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char url[MAX_URL_SIZE];
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};
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/*
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* Each variant has its own demuxer. If it currently is active,
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2011-02-20 10:04:12 +00:00
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* it has an open AVIOContext too, and potentially an AVPacket
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2010-08-19 14:54:37 +00:00
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* containing the next packet from this stream.
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*/
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struct variant {
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int bandwidth;
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char url[MAX_URL_SIZE];
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2011-03-20 22:21:56 +00:00
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AVIOContext pb;
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uint8_t* read_buffer;
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URLContext *input;
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AVFormatContext *parent;
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int index;
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2010-08-19 14:54:37 +00:00
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AVFormatContext *ctx;
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AVPacket pkt;
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int stream_offset;
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2011-03-20 22:08:59 +00:00
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int finished;
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int target_duration;
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2010-08-19 14:54:37 +00:00
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int start_seq_no;
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int n_segments;
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struct segment **segments;
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2011-03-20 22:21:56 +00:00
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int needed, cur_needed;
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int cur_seq_no;
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int64_t last_load_time;
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2010-08-19 14:54:37 +00:00
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};
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typedef struct AppleHTTPContext {
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int n_variants;
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struct variant **variants;
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int cur_seq_no;
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2011-03-20 22:21:56 +00:00
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int end_of_segment;
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int first_packet;
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2010-08-19 14:54:37 +00:00
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} AppleHTTPContext;
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2011-02-20 10:04:12 +00:00
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static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
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2010-08-19 14:54:37 +00:00
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{
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int len = ff_get_line(s, buf, maxlen);
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while (len > 0 && isspace(buf[len - 1]))
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buf[--len] = '\0';
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return len;
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}
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static void free_segment_list(struct variant *var)
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{
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int i;
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for (i = 0; i < var->n_segments; i++)
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av_free(var->segments[i]);
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av_freep(&var->segments);
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var->n_segments = 0;
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}
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static void free_variant_list(AppleHTTPContext *c)
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{
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int i;
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for (i = 0; i < c->n_variants; i++) {
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struct variant *var = c->variants[i];
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free_segment_list(var);
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av_free_packet(&var->pkt);
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2011-03-20 22:21:56 +00:00
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av_free(var->pb.buffer);
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if (var->input)
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2011-04-08 04:57:54 +00:00
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ffurl_close(var->input);
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2010-08-19 14:54:37 +00:00
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if (var->ctx) {
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var->ctx->pb = NULL;
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av_close_input_file(var->ctx);
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}
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av_free(var);
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}
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av_freep(&c->variants);
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c->n_variants = 0;
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}
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/*
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* Used to reset a statically allocated AVPacket to a clean slate,
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* containing no data.
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*/
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static void reset_packet(AVPacket *pkt)
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{
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av_init_packet(pkt);
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pkt->data = NULL;
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}
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static struct variant *new_variant(AppleHTTPContext *c, int bandwidth,
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const char *url, const char *base)
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{
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struct variant *var = av_mallocz(sizeof(struct variant));
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if (!var)
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return NULL;
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reset_packet(&var->pkt);
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var->bandwidth = bandwidth;
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2011-03-17 10:24:23 +00:00
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ff_make_absolute_url(var->url, sizeof(var->url), base, url);
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2010-08-19 14:54:37 +00:00
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dynarray_add(&c->variants, &c->n_variants, var);
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return var;
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}
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struct variant_info {
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char bandwidth[20];
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};
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static void handle_variant_args(struct variant_info *info, const char *key,
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int key_len, char **dest, int *dest_len)
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{
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2011-01-23 21:39:02 +00:00
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if (!strncmp(key, "BANDWIDTH=", key_len)) {
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2010-08-19 14:54:37 +00:00
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*dest = info->bandwidth;
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*dest_len = sizeof(info->bandwidth);
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}
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}
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static int parse_playlist(AppleHTTPContext *c, const char *url,
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2011-02-20 10:04:12 +00:00
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struct variant *var, AVIOContext *in)
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2010-08-19 14:54:37 +00:00
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{
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int ret = 0, duration = 0, is_segment = 0, is_variant = 0, bandwidth = 0;
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char line[1024];
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const char *ptr;
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int close_in = 0;
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if (!in) {
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close_in = 1;
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2011-04-04 18:11:19 +00:00
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if ((ret = avio_open(&in, url, AVIO_RDONLY)) < 0)
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2010-08-19 14:54:37 +00:00
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return ret;
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}
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read_chomp_line(in, line, sizeof(line));
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if (strcmp(line, "#EXTM3U")) {
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ret = AVERROR_INVALIDDATA;
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goto fail;
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}
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2011-03-20 22:08:59 +00:00
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if (var) {
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2010-08-19 14:54:37 +00:00
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free_segment_list(var);
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2011-03-20 22:08:59 +00:00
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var->finished = 0;
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}
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2011-03-07 20:50:25 +00:00
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while (!in->eof_reached) {
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2010-08-19 14:54:37 +00:00
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read_chomp_line(in, line, sizeof(line));
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if (av_strstart(line, "#EXT-X-STREAM-INF:", &ptr)) {
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struct variant_info info = {{0}};
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is_variant = 1;
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ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_variant_args,
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&info);
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bandwidth = atoi(info.bandwidth);
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} else if (av_strstart(line, "#EXT-X-TARGETDURATION:", &ptr)) {
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2011-03-20 22:08:59 +00:00
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if (!var) {
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var = new_variant(c, 0, url, NULL);
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if (!var) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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}
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var->target_duration = atoi(ptr);
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2010-08-19 14:54:37 +00:00
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} else if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
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if (!var) {
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var = new_variant(c, 0, url, NULL);
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if (!var) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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}
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var->start_seq_no = atoi(ptr);
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} else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
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2011-03-20 22:08:59 +00:00
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if (var)
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var->finished = 1;
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2010-08-19 14:54:37 +00:00
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} else if (av_strstart(line, "#EXTINF:", &ptr)) {
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is_segment = 1;
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duration = atoi(ptr);
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} else if (av_strstart(line, "#", NULL)) {
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continue;
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} else if (line[0]) {
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if (is_variant) {
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if (!new_variant(c, bandwidth, line, url)) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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is_variant = 0;
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bandwidth = 0;
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}
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if (is_segment) {
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struct segment *seg;
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if (!var) {
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var = new_variant(c, 0, url, NULL);
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if (!var) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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}
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seg = av_malloc(sizeof(struct segment));
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if (!seg) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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seg->duration = duration;
|
2011-03-17 10:24:23 +00:00
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ff_make_absolute_url(seg->url, sizeof(seg->url), url, line);
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2010-08-19 14:54:37 +00:00
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dynarray_add(&var->segments, &var->n_segments, seg);
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is_segment = 0;
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}
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}
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}
|
2011-03-20 22:21:56 +00:00
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if (var)
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var->last_load_time = av_gettime();
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2010-08-19 14:54:37 +00:00
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fail:
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if (close_in)
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2011-02-21 21:45:20 +00:00
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avio_close(in);
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2010-08-19 14:54:37 +00:00
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return ret;
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}
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2011-03-20 22:21:56 +00:00
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static int read_data(void *opaque, uint8_t *buf, int buf_size)
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|
{
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|
struct variant *v = opaque;
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|
AppleHTTPContext *c = v->parent->priv_data;
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int ret, i;
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|
|
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restart:
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|
|
if (!v->input) {
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reload:
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|
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/* If this is a live stream and target_duration has elapsed since
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* the last playlist reload, reload the variant playlists now. */
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|
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if (!v->finished &&
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av_gettime() - v->last_load_time >= v->target_duration*1000000 &&
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|
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(ret = parse_playlist(c, v->url, v, NULL)) < 0)
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|
return ret;
|
|
|
|
if (v->cur_seq_no < v->start_seq_no) {
|
|
|
|
av_log(NULL, AV_LOG_WARNING,
|
|
|
|
"skipping %d segments ahead, expired from playlists\n",
|
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|
|
v->start_seq_no - v->cur_seq_no);
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|
|
|
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 <
|
|
|
|
v->target_duration*1000000) {
|
|
|
|
if (url_interrupt_cb())
|
|
|
|
return AVERROR_EXIT;
|
|
|
|
usleep(100*1000);
|
|
|
|
}
|
|
|
|
/* Enough time has elapsed since the last reload */
|
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|
|
goto reload;
|
|
|
|
}
|
|
|
|
|
2011-04-08 04:57:54 +00:00
|
|
|
ret = ffurl_open(&v->input,
|
|
|
|
v->segments[v->cur_seq_no - v->start_seq_no]->url,
|
|
|
|
AVIO_RDONLY);
|
2011-03-20 22:21:56 +00:00
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
}
|
2011-04-08 04:57:54 +00:00
|
|
|
ret = ffurl_read(v->input, buf, buf_size);
|
2011-03-20 22:21:56 +00:00
|
|
|
if (ret > 0)
|
|
|
|
return ret;
|
|
|
|
if (ret < 0 && ret != AVERROR_EOF)
|
|
|
|
return ret;
|
2011-04-08 04:57:54 +00:00
|
|
|
ffurl_close(v->input);
|
2011-03-20 22:21:56 +00:00
|
|
|
v->input = NULL;
|
|
|
|
v->cur_seq_no++;
|
|
|
|
|
|
|
|
c->end_of_segment = 1;
|
|
|
|
c->cur_seq_no = v->cur_seq_no;
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2010-08-19 14:54:37 +00:00
|
|
|
static int applehttp_read_header(AVFormatContext *s, AVFormatParameters *ap)
|
|
|
|
{
|
|
|
|
AppleHTTPContext *c = s->priv_data;
|
|
|
|
int ret = 0, i, j, stream_offset = 0;
|
|
|
|
|
|
|
|
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. */
|
2011-03-20 22:08:59 +00:00
|
|
|
if (c->variants[0]->finished) {
|
2011-01-17 15:00:17 +00:00
|
|
|
int64_t duration = 0;
|
2010-08-19 14:54:37 +00:00
|
|
|
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];
|
2011-03-20 22:21:56 +00:00
|
|
|
AVInputFormat *in_fmt = NULL;
|
2010-08-19 14:54:37 +00:00
|
|
|
if (v->n_segments == 0)
|
|
|
|
continue;
|
2011-03-20 22:21:56 +00:00
|
|
|
|
|
|
|
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)
|
|
|
|
goto fail;
|
|
|
|
ret = av_open_input_stream(&v->ctx, &v->pb, v->segments[0]->url,
|
|
|
|
in_fmt, NULL);
|
2010-08-19 14:54:37 +00:00
|
|
|
if (ret < 0)
|
|
|
|
goto fail;
|
|
|
|
v->stream_offset = stream_offset;
|
|
|
|
/* Create new AVStreams for each stream in this variant */
|
|
|
|
for (j = 0; j < v->ctx->nb_streams; j++) {
|
|
|
|
AVStream *st = av_new_stream(s, i);
|
|
|
|
if (!st) {
|
|
|
|
ret = AVERROR(ENOMEM);
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
avcodec_copy_context(st->codec, v->ctx->streams[j]->codec);
|
|
|
|
}
|
|
|
|
stream_offset += v->ctx->nb_streams;
|
|
|
|
}
|
|
|
|
|
2011-03-20 22:21:56 +00:00
|
|
|
c->first_packet = 1;
|
2010-08-19 14:54:37 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
|
|
free_variant_list(c);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2011-03-20 22:21:56 +00:00
|
|
|
static int recheck_discard_flags(AVFormatContext *s, int first)
|
2010-08-19 14:54:37 +00:00
|
|
|
{
|
2011-03-20 22:21:56 +00:00
|
|
|
AppleHTTPContext *c = s->priv_data;
|
|
|
|
int i, changed = 0;
|
2010-08-19 14:54:37 +00:00
|
|
|
|
2011-03-20 22:21:56 +00:00
|
|
|
/* 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;
|
2010-08-19 14:54:37 +00:00
|
|
|
}
|
2011-03-20 22:21:56 +00:00
|
|
|
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)
|
2011-04-08 04:57:54 +00:00
|
|
|
ffurl_close(v->input);
|
2011-03-20 22:21:56 +00:00
|
|
|
v->input = NULL;
|
|
|
|
v->needed = 0;
|
|
|
|
changed = 1;
|
|
|
|
av_log(s, AV_LOG_INFO, "No longer receiving variant %d\n", i);
|
2010-08-19 14:54:37 +00:00
|
|
|
}
|
|
|
|
}
|
2011-03-20 22:21:56 +00:00
|
|
|
return changed;
|
2010-08-19 14:54:37 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int applehttp_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
|
|
{
|
|
|
|
AppleHTTPContext *c = s->priv_data;
|
2011-03-20 22:21:56 +00:00
|
|
|
int ret, i, minvariant = -1;
|
2010-08-19 14:54:37 +00:00
|
|
|
|
2011-03-20 22:21:56 +00:00
|
|
|
if (c->first_packet) {
|
|
|
|
recheck_discard_flags(s, 1);
|
|
|
|
c->first_packet = 0;
|
2010-08-19 14:54:37 +00:00
|
|
|
}
|
2011-03-20 22:21:56 +00:00
|
|
|
|
2010-08-19 14:54:37 +00:00
|
|
|
start:
|
2011-03-20 22:21:56 +00:00
|
|
|
c->end_of_segment = 0;
|
2010-08-19 14:54:37 +00:00
|
|
|
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 */
|
2011-03-20 22:21:56 +00:00
|
|
|
if (var->needed && !var->pkt.data) {
|
2010-08-19 14:54:37 +00:00
|
|
|
ret = av_read_frame(var->ctx, &var->pkt);
|
|
|
|
if (ret < 0) {
|
2011-03-20 22:21:56 +00:00
|
|
|
if (!var->pb.eof_reached)
|
2010-08-19 14:54:37 +00:00
|
|
|
return ret;
|
|
|
|
reset_packet(&var->pkt);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* Check if this stream has the packet with the lowest dts */
|
|
|
|
if (var->pkt.data) {
|
|
|
|
if (minvariant < 0 ||
|
|
|
|
var->pkt.dts < c->variants[minvariant]->pkt.dts)
|
|
|
|
minvariant = i;
|
|
|
|
}
|
|
|
|
}
|
2011-03-20 22:21:56 +00:00
|
|
|
if (c->end_of_segment) {
|
|
|
|
if (recheck_discard_flags(s, 0))
|
|
|
|
goto start;
|
|
|
|
}
|
2010-08-19 14:54:37 +00:00
|
|
|
/* 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;
|
|
|
|
}
|
2011-03-20 22:21:56 +00:00
|
|
|
return AVERROR_EOF;
|
2010-08-19 14:54:37 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int applehttp_close(AVFormatContext *s)
|
|
|
|
{
|
|
|
|
AppleHTTPContext *c = s->priv_data;
|
|
|
|
|
|
|
|
free_variant_list(c);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int applehttp_read_seek(AVFormatContext *s, int stream_index,
|
|
|
|
int64_t timestamp, int flags)
|
|
|
|
{
|
|
|
|
AppleHTTPContext *c = s->priv_data;
|
2011-03-20 22:21:56 +00:00
|
|
|
int i, j, ret;
|
2010-08-19 14:54:37 +00:00
|
|
|
|
2011-03-20 22:08:59 +00:00
|
|
|
if ((flags & AVSEEK_FLAG_BYTE) || !c->variants[0]->finished)
|
2010-08-19 14:54:37 +00:00
|
|
|
return AVERROR(ENOSYS);
|
|
|
|
|
2011-03-20 22:23:54 +00:00
|
|
|
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);
|
|
|
|
ret = AVERROR(EIO);
|
2010-08-19 14:54:37 +00:00
|
|
|
for (i = 0; i < c->n_variants; i++) {
|
2011-03-20 22:23:54 +00:00
|
|
|
/* Reset reading */
|
2010-08-19 14:54:37 +00:00
|
|
|
struct variant *var = c->variants[i];
|
2011-03-20 22:23:54 +00:00
|
|
|
int64_t pos = 0;
|
2011-03-20 22:21:56 +00:00
|
|
|
if (var->input) {
|
2011-04-08 04:57:54 +00:00
|
|
|
ffurl_close(var->input);
|
2011-03-20 22:21:56 +00:00
|
|
|
var->input = NULL;
|
2010-08-19 14:54:37 +00:00
|
|
|
}
|
|
|
|
av_free_packet(&var->pkt);
|
|
|
|
reset_packet(&var->pkt);
|
2011-03-20 22:21:56 +00:00
|
|
|
var->pb.eof_reached = 0;
|
2010-08-19 14:54:37 +00:00
|
|
|
|
2011-03-20 22:21:56 +00:00
|
|
|
/* 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;
|
2010-08-19 14:54:37 +00:00
|
|
|
}
|
|
|
|
}
|
2011-03-20 22:21:56 +00:00
|
|
|
return ret;
|
2010-08-19 14:54:37 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int applehttp_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;
|
|
|
|
}
|
|
|
|
|
2011-01-25 22:03:28 +00:00
|
|
|
AVInputFormat ff_applehttp_demuxer = {
|
2010-08-19 14:54:37 +00:00
|
|
|
"applehttp",
|
|
|
|
NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming format"),
|
|
|
|
sizeof(AppleHTTPContext),
|
|
|
|
applehttp_probe,
|
|
|
|
applehttp_read_header,
|
|
|
|
applehttp_read_packet,
|
|
|
|
applehttp_close,
|
|
|
|
applehttp_read_seek,
|
|
|
|
};
|