/*
* Apple HTTP Live Streaming demuxer
* Copyright (c) 2010 Martin Storsjo
+ * Copyright (c) 2013 Anssi Hannula
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
*/
#include "libavutil/avstring.h"
+#include "libavutil/avassert.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "avformat.h"
#include "internal.h"
#include "avio_internal.h"
+#include "id3v2.h"
#define INITIAL_BUFFER_SIZE 32768
+#define MAX_FIELD_LEN 64
+#define MAX_CHARACTERISTICS_LEN 512
+
+#define MPEG_TIME_BASE 90000
+#define MPEG_TIME_BASE_Q (AVRational){1, MPEG_TIME_BASE}
+
/*
* An apple http stream consists of a playlist with media segment files,
* played sequentially. There may be several playlists with the same
enum KeyType {
KEY_NONE,
KEY_AES_128,
+ KEY_SAMPLE_AES
};
struct segment {
int64_t duration;
- char url[MAX_URL_SIZE];
- char key[MAX_URL_SIZE];
+ int64_t url_offset;
+ int64_t size;
+ char *url;
+ char *key;
enum KeyType key_type;
uint8_t iv[16];
+ /* associated Media Initialization Section, treated as a segment */
+ struct segment *init_section;
+};
+
+struct rendition;
+
+enum PlaylistType {
+ PLS_TYPE_UNSPECIFIED,
+ PLS_TYPE_EVENT,
+ PLS_TYPE_VOD
};
/*
- * Each variant has its own demuxer. If it currently is active,
+ * Each playlist 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;
+struct playlist {
char url[MAX_URL_SIZE];
AVIOContext pb;
uint8_t* read_buffer;
int stream_offset;
int finished;
+ enum PlaylistType type;
int64_t target_duration;
int start_seq_no;
int n_segments;
struct segment **segments;
int needed, cur_needed;
int cur_seq_no;
+ int64_t cur_seg_offset;
int64_t last_load_time;
+ /* Currently active Media Initialization Section */
+ struct segment *cur_init_section;
+ uint8_t *init_sec_buf;
+ unsigned int init_sec_buf_size;
+ unsigned int init_sec_data_len;
+ unsigned int init_sec_buf_read_offset;
+
char key_url[MAX_URL_SIZE];
uint8_t key[16];
+
+ /* ID3 timestamp handling (elementary audio streams have ID3 timestamps
+ * (and possibly other ID3 tags) in the beginning of each segment) */
+ int is_id3_timestamped; /* -1: not yet known */
+ int64_t id3_mpegts_timestamp; /* in mpegts tb */
+ int64_t id3_offset; /* in stream original tb */
+ uint8_t* id3_buf; /* temp buffer for id3 parsing */
+ unsigned int id3_buf_size;
+ AVDictionary *id3_initial; /* data from first id3 tag */
+ int id3_found; /* ID3 tag found at some point */
+ int id3_changed; /* ID3 tag data has changed at some point */
+ ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer is opened */
+
+ int64_t seek_timestamp;
+ int seek_flags;
+ int seek_stream_index; /* into subdemuxer stream array */
+
+ /* Renditions associated with this playlist, if any.
+ * Alternative rendition playlists have a single rendition associated
+ * with them, and variant main Media Playlists may have
+ * multiple (playlist-less) renditions associated with them. */
+ int n_renditions;
+ struct rendition **renditions;
+
+ /* Media Initialization Sections (EXT-X-MAP) associated with this
+ * playlist, if any. */
+ int n_init_sections;
+ struct segment **init_sections;
+};
+
+/*
+ * Renditions are e.g. alternative subtitle or audio streams.
+ * The rendition may either be an external playlist or it may be
+ * contained in the main Media Playlist of the variant (in which case
+ * playlist is NULL).
+ */
+struct rendition {
+ enum AVMediaType type;
+ struct playlist *playlist;
+ char group_id[MAX_FIELD_LEN];
+ char language[MAX_FIELD_LEN];
+ char name[MAX_FIELD_LEN];
+ int disposition;
+};
+
+struct variant {
+ int bandwidth;
+
+ /* every variant contains at least the main Media Playlist in index 0 */
+ int n_playlists;
+ struct playlist **playlists;
+
+ char audio_group[MAX_FIELD_LEN];
+ char video_group[MAX_FIELD_LEN];
+ char subtitles_group[MAX_FIELD_LEN];
};
typedef struct HLSContext {
+ AVClass *class;
AVFormatContext *ctx;
int n_variants;
struct variant **variants;
+ int n_playlists;
+ struct playlist **playlists;
+ int n_renditions;
+ struct rendition **renditions;
+
int cur_seq_no;
- int end_of_segment;
+ int live_start_index;
int first_packet;
int64_t first_timestamp;
- int64_t seek_timestamp;
- int seek_flags;
+ int64_t cur_timestamp;
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
+ char *headers; ///< holds HTTP headers set as an AVOption to the HTTP protocol context
+ char *http_proxy; ///< holds the address of the HTTP proxy server
AVDictionary *avio_opts;
+ int strict_std_compliance;
} HLSContext;
static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
return len;
}
-static void free_segment_list(struct variant *var)
+static void free_segment_list(struct playlist *pls)
+{
+ int i;
+ for (i = 0; i < pls->n_segments; i++) {
+ av_freep(&pls->segments[i]->key);
+ av_freep(&pls->segments[i]->url);
+ av_freep(&pls->segments[i]);
+ }
+ av_freep(&pls->segments);
+ pls->n_segments = 0;
+}
+
+static void free_init_section_list(struct playlist *pls)
{
int i;
- for (i = 0; i < var->n_segments; i++)
- av_free(var->segments[i]);
- av_freep(&var->segments);
- var->n_segments = 0;
+ for (i = 0; i < pls->n_init_sections; i++) {
+ av_freep(&pls->init_sections[i]->url);
+ av_freep(&pls->init_sections[i]);
+ }
+ av_freep(&pls->init_sections);
+ pls->n_init_sections = 0;
+}
+
+static void free_playlist_list(HLSContext *c)
+{
+ int i;
+ for (i = 0; i < c->n_playlists; i++) {
+ struct playlist *pls = c->playlists[i];
+ free_segment_list(pls);
+ free_init_section_list(pls);
+ av_freep(&pls->renditions);
+ av_freep(&pls->id3_buf);
+ av_dict_free(&pls->id3_initial);
+ ff_id3v2_free_extra_meta(&pls->id3_deferred_extra);
+ av_freep(&pls->init_sec_buf);
+ av_packet_unref(&pls->pkt);
+ av_freep(&pls->pb.buffer);
+ if (pls->input)
+ ff_format_io_close(c->ctx, &pls->input);
+ if (pls->ctx) {
+ pls->ctx->pb = NULL;
+ avformat_close_input(&pls->ctx);
+ }
+ av_free(pls);
+ }
+ av_freep(&c->playlists);
+ av_freep(&c->cookies);
+ av_freep(&c->user_agent);
+ av_freep(&c->headers);
+ av_freep(&c->http_proxy);
+ c->n_playlists = 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_packet_unref(&var->pkt);
- av_free(var->pb.buffer);
- if (var->input)
- ff_format_io_close(c->ctx, &var->input);
- if (var->ctx) {
- var->ctx->pb = NULL;
- avformat_close_input(&var->ctx);
- }
+ av_freep(&var->playlists);
av_free(var);
}
av_freep(&c->variants);
c->n_variants = 0;
}
+static void free_rendition_list(HLSContext *c)
+{
+ int i;
+ for (i = 0; i < c->n_renditions; i++)
+ av_freep(&c->renditions[i]);
+ av_freep(&c->renditions);
+ c->n_renditions = 0;
+}
+
/*
* Used to reset a statically allocated AVPacket to a clean slate,
* containing no data.
pkt->data = NULL;
}
-static struct variant *new_variant(HLSContext *c, int bandwidth,
- const char *url, const char *base)
+static struct playlist *new_playlist(HLSContext *c, const char *url,
+ const char *base)
{
- struct variant *var = av_mallocz(sizeof(struct variant));
- if (!var)
+ struct playlist *pls = av_mallocz(sizeof(struct playlist));
+ if (!pls)
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;
+ reset_packet(&pls->pkt);
+ ff_make_absolute_url(pls->url, sizeof(pls->url), base, url);
+ pls->seek_timestamp = AV_NOPTS_VALUE;
+
+ pls->is_id3_timestamped = -1;
+ pls->id3_mpegts_timestamp = AV_NOPTS_VALUE;
+
+ dynarray_add(&c->playlists, &c->n_playlists, pls);
+ return pls;
}
struct variant_info {
char bandwidth[20];
+ /* variant group ids: */
+ char audio[MAX_FIELD_LEN];
+ char video[MAX_FIELD_LEN];
+ char subtitles[MAX_FIELD_LEN];
};
+static struct variant *new_variant(HLSContext *c, struct variant_info *info,
+ const char *url, const char *base)
+{
+ struct variant *var;
+ struct playlist *pls;
+
+ pls = new_playlist(c, url, base);
+ if (!pls)
+ return NULL;
+
+ var = av_mallocz(sizeof(struct variant));
+ if (!var)
+ return NULL;
+
+ if (info) {
+ var->bandwidth = atoi(info->bandwidth);
+ strcpy(var->audio_group, info->audio);
+ strcpy(var->video_group, info->video);
+ strcpy(var->subtitles_group, info->subtitles);
+ }
+
+ dynarray_add(&c->variants, &c->n_variants, var);
+ dynarray_add(&var->playlists, &var->n_playlists, pls);
+ return var;
+}
+
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);
+ } else if (!strncmp(key, "AUDIO=", key_len)) {
+ *dest = info->audio;
+ *dest_len = sizeof(info->audio);
+ } else if (!strncmp(key, "VIDEO=", key_len)) {
+ *dest = info->video;
+ *dest_len = sizeof(info->video);
+ } else if (!strncmp(key, "SUBTITLES=", key_len)) {
+ *dest = info->subtitles;
+ *dest_len = sizeof(info->subtitles);
}
}
struct key_info {
char uri[MAX_URL_SIZE];
- char method[10];
+ char method[11];
char iv[35];
};
}
}
-static int open_in(HLSContext *c, AVIOContext **in, const char *url)
+struct init_section_info {
+ char uri[MAX_URL_SIZE];
+ char byterange[32];
+};
+
+static struct segment *new_init_section(struct playlist *pls,
+ struct init_section_info *info,
+ const char *url_base)
{
- AVDictionary *tmp = NULL;
- int ret;
+ struct segment *sec;
+ char *ptr;
+ char tmp_str[MAX_URL_SIZE];
- av_dict_copy(&tmp, c->avio_opts, 0);
+ if (!info->uri[0])
+ return NULL;
- ret = c->ctx->io_open(c->ctx, in, url, AVIO_FLAG_READ, &tmp);
+ sec = av_mallocz(sizeof(*sec));
+ if (!sec)
+ return NULL;
- av_dict_free(&tmp);
- return ret;
+ ff_make_absolute_url(tmp_str, sizeof(tmp_str), url_base, info->uri);
+ sec->url = av_strdup(tmp_str);
+ if (!sec->url) {
+ av_free(sec);
+ return NULL;
+ }
+
+ if (info->byterange[0]) {
+ sec->size = atoi(info->byterange);
+ ptr = strchr(info->byterange, '@');
+ if (ptr)
+ sec->url_offset = atoi(ptr+1);
+ } else {
+ /* the entire file is the init section */
+ sec->size = -1;
+ }
+
+ dynarray_add(&pls->init_sections, &pls->n_init_sections, sec);
+
+ return sec;
+}
+
+static void handle_init_section_args(struct init_section_info *info, const char *key,
+ int key_len, char **dest, int *dest_len)
+{
+ if (!strncmp(key, "URI=", key_len)) {
+ *dest = info->uri;
+ *dest_len = sizeof(info->uri);
+ } else if (!strncmp(key, "BYTERANGE=", key_len)) {
+ *dest = info->byterange;
+ *dest_len = sizeof(info->byterange);
+ }
+}
+
+struct rendition_info {
+ char type[16];
+ char uri[MAX_URL_SIZE];
+ char group_id[MAX_FIELD_LEN];
+ char language[MAX_FIELD_LEN];
+ char assoc_language[MAX_FIELD_LEN];
+ char name[MAX_FIELD_LEN];
+ char defaultr[4];
+ char forced[4];
+ char characteristics[MAX_CHARACTERISTICS_LEN];
+};
+
+static struct rendition *new_rendition(HLSContext *c, struct rendition_info *info,
+ const char *url_base)
+{
+ struct rendition *rend;
+ enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
+ char *characteristic;
+ char *chr_ptr;
+ char *saveptr;
+
+ if (!strcmp(info->type, "AUDIO"))
+ type = AVMEDIA_TYPE_AUDIO;
+ else if (!strcmp(info->type, "VIDEO"))
+ type = AVMEDIA_TYPE_VIDEO;
+ else if (!strcmp(info->type, "SUBTITLES"))
+ type = AVMEDIA_TYPE_SUBTITLE;
+ else if (!strcmp(info->type, "CLOSED-CAPTIONS"))
+ /* CLOSED-CAPTIONS is ignored since we do not support CEA-608 CC in
+ * AVC SEI RBSP anyway */
+ return NULL;
+
+ if (type == AVMEDIA_TYPE_UNKNOWN)
+ return NULL;
+
+ /* URI is mandatory for subtitles as per spec */
+ if (type == AVMEDIA_TYPE_SUBTITLE && !info->uri[0])
+ return NULL;
+
+ /* TODO: handle subtitles (each segment has to parsed separately) */
+ if (c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL)
+ if (type == AVMEDIA_TYPE_SUBTITLE)
+ return NULL;
+
+ rend = av_mallocz(sizeof(struct rendition));
+ if (!rend)
+ return NULL;
+
+ dynarray_add(&c->renditions, &c->n_renditions, rend);
+
+ rend->type = type;
+ strcpy(rend->group_id, info->group_id);
+ strcpy(rend->language, info->language);
+ strcpy(rend->name, info->name);
+
+ /* add the playlist if this is an external rendition */
+ if (info->uri[0]) {
+ rend->playlist = new_playlist(c, info->uri, url_base);
+ if (rend->playlist)
+ dynarray_add(&rend->playlist->renditions,
+ &rend->playlist->n_renditions, rend);
+ }
+
+ if (info->assoc_language[0]) {
+ int langlen = strlen(rend->language);
+ if (langlen < sizeof(rend->language) - 3) {
+ rend->language[langlen] = ',';
+ strncpy(rend->language + langlen + 1, info->assoc_language,
+ sizeof(rend->language) - langlen - 2);
+ }
+ }
+
+ if (!strcmp(info->defaultr, "YES"))
+ rend->disposition |= AV_DISPOSITION_DEFAULT;
+ if (!strcmp(info->forced, "YES"))
+ rend->disposition |= AV_DISPOSITION_FORCED;
+
+ chr_ptr = info->characteristics;
+ while ((characteristic = av_strtok(chr_ptr, ",", &saveptr))) {
+ if (!strcmp(characteristic, "public.accessibility.describes-music-and-sound"))
+ rend->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
+ else if (!strcmp(characteristic, "public.accessibility.describes-video"))
+ rend->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED;
+
+ chr_ptr = NULL;
+ }
+
+ return rend;
+}
+
+static void handle_rendition_args(struct rendition_info *info, const char *key,
+ int key_len, char **dest, int *dest_len)
+{
+ if (!strncmp(key, "TYPE=", key_len)) {
+ *dest = info->type;
+ *dest_len = sizeof(info->type);
+ } else if (!strncmp(key, "URI=", key_len)) {
+ *dest = info->uri;
+ *dest_len = sizeof(info->uri);
+ } else if (!strncmp(key, "GROUP-ID=", key_len)) {
+ *dest = info->group_id;
+ *dest_len = sizeof(info->group_id);
+ } else if (!strncmp(key, "LANGUAGE=", key_len)) {
+ *dest = info->language;
+ *dest_len = sizeof(info->language);
+ } else if (!strncmp(key, "ASSOC-LANGUAGE=", key_len)) {
+ *dest = info->assoc_language;
+ *dest_len = sizeof(info->assoc_language);
+ } else if (!strncmp(key, "NAME=", key_len)) {
+ *dest = info->name;
+ *dest_len = sizeof(info->name);
+ } else if (!strncmp(key, "DEFAULT=", key_len)) {
+ *dest = info->defaultr;
+ *dest_len = sizeof(info->defaultr);
+ } else if (!strncmp(key, "FORCED=", key_len)) {
+ *dest = info->forced;
+ *dest_len = sizeof(info->forced);
+ } else if (!strncmp(key, "CHARACTERISTICS=", key_len)) {
+ *dest = info->characteristics;
+ *dest_len = sizeof(info->characteristics);
+ }
+ /*
+ * ignored:
+ * - AUTOSELECT: client may autoselect based on e.g. system language
+ * - INSTREAM-ID: EIA-608 closed caption number ("CC1".."CC4")
+ */
+}
+
+/* used by parse_playlist to allocate a new variant+playlist when the
+ * playlist is detected to be a Media Playlist (not Master Playlist)
+ * and we have no parent Master Playlist (parsing of which would have
+ * allocated the variant and playlist already)
+ * *pls == NULL => Master Playlist or parentless Media Playlist
+ * *pls != NULL => parented Media Playlist, playlist+variant allocated */
+static int ensure_playlist(HLSContext *c, struct playlist **pls, const char *url)
+{
+ if (*pls)
+ return 0;
+ if (!new_variant(c, NULL, url, NULL))
+ return AVERROR(ENOMEM);
+ *pls = c->playlists[c->n_playlists - 1];
+ return 0;
+}
+
+static void update_options(char **dest, const char *name, void *src)
+{
+ av_freep(dest);
+ av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest);
+ if (*dest && !strlen(*dest))
+ av_freep(dest);
}
static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url,
- const AVDictionary *opts)
+ AVDictionary *opts, AVDictionary *opts2)
{
+ HLSContext *c = s->priv_data;
AVDictionary *tmp = NULL;
+ const char *proto_name = NULL;
int ret;
av_dict_copy(&tmp, opts, 0);
+ av_dict_copy(&tmp, opts2, 0);
+
+ if (av_strstart(url, "crypto", NULL)) {
+ if (url[6] == '+' || url[6] == ':')
+ proto_name = avio_find_protocol_name(url + 7);
+ }
+
+ if (!proto_name)
+ proto_name = avio_find_protocol_name(url);
+
+ if (!proto_name)
+ return AVERROR_INVALIDDATA;
+
+ // only http(s) & file are allowed
+ if (!av_strstart(proto_name, "http", NULL) && !av_strstart(proto_name, "file", NULL))
+ return AVERROR_INVALIDDATA;
+ if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':')
+ ;
+ else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':')
+ ;
+ else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5))
+ return AVERROR_INVALIDDATA;
ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp);
+ if (ret >= 0) {
+ // update cookies on http response with setcookies.
+ void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
+ update_options(&c->cookies, "cookies", u);
+ av_dict_set(&opts, "cookies", c->cookies, 0);
+ }
av_dict_free(&tmp);
}
static int parse_playlist(HLSContext *c, const char *url,
- struct variant *var, AVIOContext *in)
+ struct playlist *pls, AVIOContext *in)
{
- int ret = 0, is_segment = 0, is_variant = 0, bandwidth = 0;
+ int ret = 0, is_segment = 0, is_variant = 0;
int64_t duration = 0;
enum KeyType key_type = KEY_NONE;
uint8_t iv[16] = "";
int has_iv = 0;
char key[MAX_URL_SIZE] = "";
- char line[1024];
+ char line[MAX_URL_SIZE];
const char *ptr;
int close_in = 0;
+ int64_t seg_offset = 0;
+ int64_t seg_size = -1;
uint8_t *new_url = NULL;
+ struct variant_info variant_info;
+ char tmp_str[MAX_URL_SIZE];
+ struct segment *cur_init_section = NULL;
if (!in) {
+#if 1
+ AVDictionary *opts = NULL;
+ close_in = 1;
+ /* Some HLS servers don't 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);
+ av_dict_set(&opts, "headers", c->headers, 0);
+ av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
+
+ ret = c->ctx->io_open(c->ctx, &in, url, AVIO_FLAG_READ, &opts);
+ av_dict_free(&opts);
+ if (ret < 0)
+ return ret;
+#else
ret = open_in(c, &in, url);
if (ret < 0)
return ret;
close_in = 1;
+#endif
}
if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0)
goto fail;
}
- if (var) {
- free_segment_list(var);
- var->finished = 0;
+ if (pls) {
+ free_segment_list(pls);
+ pls->finished = 0;
+ pls->type = PLS_TYPE_UNSPECIFIED;
}
- while (!in->eof_reached) {
+ while (!avio_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;
+ memset(&variant_info, 0, sizeof(variant_info));
ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_variant_args,
- &info);
- bandwidth = atoi(info.bandwidth);
+ &variant_info);
} 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,
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;
}
av_strlcpy(key, info.uri, sizeof(key));
+ } else if (av_strstart(line, "#EXT-X-MEDIA:", &ptr)) {
+ struct rendition_info info = {{0}};
+ ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_rendition_args,
+ &info);
+ new_rendition(c, &info, url);
} 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) * AV_TIME_BASE;
+ ret = ensure_playlist(c, &pls, url);
+ if (ret < 0)
+ goto fail;
+ pls->target_duration = atoi(ptr) * AV_TIME_BASE;
} 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);
+ ret = ensure_playlist(c, &pls, url);
+ if (ret < 0)
+ goto fail;
+ pls->start_seq_no = atoi(ptr);
+ } else if (av_strstart(line, "#EXT-X-PLAYLIST-TYPE:", &ptr)) {
+ ret = ensure_playlist(c, &pls, url);
+ if (ret < 0)
+ goto fail;
+ if (!strcmp(ptr, "EVENT"))
+ pls->type = PLS_TYPE_EVENT;
+ else if (!strcmp(ptr, "VOD"))
+ pls->type = PLS_TYPE_VOD;
+ } else if (av_strstart(line, "#EXT-X-MAP:", &ptr)) {
+ struct init_section_info info = {{0}};
+ ret = ensure_playlist(c, &pls, url);
+ if (ret < 0)
+ goto fail;
+ ff_parse_key_value(ptr, (ff_parse_key_val_cb) handle_init_section_args,
+ &info);
+ cur_init_section = new_init_section(pls, &info, url);
} else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
- if (var)
- var->finished = 1;
+ if (pls)
+ pls->finished = 1;
} else if (av_strstart(line, "#EXTINF:", &ptr)) {
is_segment = 1;
duration = atof(ptr) * AV_TIME_BASE;
+ } else if (av_strstart(line, "#EXT-X-BYTERANGE:", &ptr)) {
+ seg_size = atoi(ptr);
+ ptr = strchr(ptr, '@');
+ if (ptr)
+ seg_offset = atoi(ptr+1);
} else if (av_strstart(line, "#", NULL)) {
continue;
} else if (line[0]) {
if (is_variant) {
- if (!new_variant(c, bandwidth, line, url)) {
+ if (!new_variant(c, &variant_info, 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) {
+ if (!pls) {
+ if (!new_variant(c, 0, url, NULL)) {
ret = AVERROR(ENOMEM);
goto fail;
}
+ pls = c->playlists[c->n_playlists - 1];
}
seg = av_malloc(sizeof(struct segment));
if (!seg) {
if (has_iv) {
memcpy(seg->iv, iv, sizeof(iv));
} else {
- int seq = var->start_seq_no + var->n_segments;
+ int seq = pls->start_seq_no + pls->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);
+
+ if (key_type != KEY_NONE) {
+ ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, key);
+ seg->key = av_strdup(tmp_str);
+ if (!seg->key) {
+ av_free(seg);
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ } else {
+ seg->key = NULL;
+ }
+
+ ff_make_absolute_url(tmp_str, sizeof(tmp_str), url, line);
+ seg->url = av_strdup(tmp_str);
+ if (!seg->url) {
+ av_free(seg->key);
+ av_free(seg);
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ dynarray_add(&pls->segments, &pls->n_segments, seg);
is_segment = 0;
+
+ seg->size = seg_size;
+ if (seg_size >= 0) {
+ seg->url_offset = seg_offset;
+ seg_offset += seg_size;
+ seg_size = -1;
+ } else {
+ seg->url_offset = 0;
+ seg_offset = 0;
+ }
+
+ seg->init_section = cur_init_section;
}
}
}
- if (var)
- var->last_load_time = av_gettime_relative();
+ if (pls)
+ pls->last_load_time = av_gettime_relative();
fail:
av_free(new_url);
return ret;
}
-static int open_input(struct variant *var)
+static struct segment *current_segment(struct playlist *pls)
+{
+ return pls->segments[pls->cur_seq_no - pls->start_seq_no];
+}
+
+enum ReadFromURLMode {
+ READ_NORMAL,
+ READ_COMPLETE,
+};
+
+static int read_from_url(struct playlist *pls, struct segment *seg,
+ uint8_t *buf, int buf_size,
+ enum ReadFromURLMode mode)
+{
+ int ret;
+
+ /* limit read if the segment was only a part of a file */
+ if (seg->size >= 0)
+ buf_size = FFMIN(buf_size, seg->size - pls->cur_seg_offset);
+
+ if (mode == READ_COMPLETE) {
+ ret = avio_read(pls->input, buf, buf_size);
+ if (ret != buf_size)
+ av_log(NULL, AV_LOG_ERROR, "Could not read complete segment.\n");
+ } else
+ ret = avio_read(pls->input, buf, buf_size);
+
+ if (ret > 0)
+ pls->cur_seg_offset += ret;
+
+ return ret;
+}
+
+/* Parse the raw ID3 data and pass contents to caller */
+static void parse_id3(AVFormatContext *s, AVIOContext *pb,
+ AVDictionary **metadata, int64_t *dts,
+ ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta **extra_meta)
+{
+ static const char id3_priv_owner_ts[] = "com.apple.streaming.transportStreamTimestamp";
+ ID3v2ExtraMeta *meta;
+
+ ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
+ for (meta = *extra_meta; meta; meta = meta->next) {
+ if (!strcmp(meta->tag, "PRIV")) {
+ ID3v2ExtraMetaPRIV *priv = meta->data;
+ if (priv->datasize == 8 && !strcmp(priv->owner, id3_priv_owner_ts)) {
+ /* 33-bit MPEG timestamp */
+ int64_t ts = AV_RB64(priv->data);
+ av_log(s, AV_LOG_DEBUG, "HLS ID3 audio timestamp %"PRId64"\n", ts);
+ if ((ts & ~((1ULL << 33) - 1)) == 0)
+ *dts = ts;
+ else
+ av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio timestamp %"PRId64"\n", ts);
+ }
+ } else if (!strcmp(meta->tag, "APIC") && apic)
+ *apic = meta->data;
+ }
+}
+
+/* Check if the ID3 metadata contents have changed */
+static int id3_has_changed_values(struct playlist *pls, AVDictionary *metadata,
+ ID3v2ExtraMetaAPIC *apic)
+{
+ AVDictionaryEntry *entry = NULL;
+ AVDictionaryEntry *oldentry;
+ /* check that no keys have changed values */
+ while ((entry = av_dict_get(metadata, "", entry, AV_DICT_IGNORE_SUFFIX))) {
+ oldentry = av_dict_get(pls->id3_initial, entry->key, NULL, AV_DICT_MATCH_CASE);
+ if (!oldentry || strcmp(oldentry->value, entry->value) != 0)
+ return 1;
+ }
+
+ /* check if apic appeared */
+ if (apic && (pls->ctx->nb_streams != 2 || !pls->ctx->streams[1]->attached_pic.data))
+ return 1;
+
+ if (apic) {
+ int size = pls->ctx->streams[1]->attached_pic.size;
+ if (size != apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE)
+ return 1;
+
+ if (memcmp(apic->buf->data, pls->ctx->streams[1]->attached_pic.data, size) != 0)
+ return 1;
+ }
+
+ return 0;
+}
+
+/* Parse ID3 data and handle the found data */
+static void handle_id3(AVIOContext *pb, struct playlist *pls)
+{
+ AVDictionary *metadata = NULL;
+ ID3v2ExtraMetaAPIC *apic = NULL;
+ ID3v2ExtraMeta *extra_meta = NULL;
+ int64_t timestamp = AV_NOPTS_VALUE;
+
+ parse_id3(pls->ctx, pb, &metadata, ×tamp, &apic, &extra_meta);
+
+ if (timestamp != AV_NOPTS_VALUE) {
+ pls->id3_mpegts_timestamp = timestamp;
+ pls->id3_offset = 0;
+ }
+
+ if (!pls->id3_found) {
+ /* initial ID3 tags */
+ av_assert0(!pls->id3_deferred_extra);
+ pls->id3_found = 1;
+
+ /* get picture attachment and set text metadata */
+ if (pls->ctx->nb_streams)
+ ff_id3v2_parse_apic(pls->ctx, &extra_meta);
+ else
+ /* demuxer not yet opened, defer picture attachment */
+ pls->id3_deferred_extra = extra_meta;
+
+ av_dict_copy(&pls->ctx->metadata, metadata, 0);
+ pls->id3_initial = metadata;
+
+ } else {
+ if (!pls->id3_changed && id3_has_changed_values(pls, metadata, apic)) {
+ avpriv_report_missing_feature(pls->ctx, "Changing ID3 metadata in HLS audio elementary stream");
+ pls->id3_changed = 1;
+ }
+ av_dict_free(&metadata);
+ }
+
+ if (!pls->id3_deferred_extra)
+ ff_id3v2_free_extra_meta(&extra_meta);
+}
+
+static void intercept_id3(struct playlist *pls, uint8_t *buf,
+ int buf_size, int *len)
+{
+ /* intercept id3 tags, we do not want to pass them to the raw
+ * demuxer on all segment switches */
+ int bytes;
+ int id3_buf_pos = 0;
+ int fill_buf = 0;
+ struct segment *seg = current_segment(pls);
+
+ /* gather all the id3 tags */
+ while (1) {
+ /* see if we can retrieve enough data for ID3 header */
+ if (*len < ID3v2_HEADER_SIZE && buf_size >= ID3v2_HEADER_SIZE) {
+ bytes = read_from_url(pls, seg, buf + *len, ID3v2_HEADER_SIZE - *len, READ_COMPLETE);
+ if (bytes > 0) {
+
+ if (bytes == ID3v2_HEADER_SIZE - *len)
+ /* no EOF yet, so fill the caller buffer again after
+ * we have stripped the ID3 tags */
+ fill_buf = 1;
+
+ *len += bytes;
+
+ } else if (*len <= 0) {
+ /* error/EOF */
+ *len = bytes;
+ fill_buf = 0;
+ }
+ }
+
+ if (*len < ID3v2_HEADER_SIZE)
+ break;
+
+ if (ff_id3v2_match(buf, ID3v2_DEFAULT_MAGIC)) {
+ int64_t maxsize = seg->size >= 0 ? seg->size : 1024*1024;
+ int taglen = ff_id3v2_tag_len(buf);
+ int tag_got_bytes = FFMIN(taglen, *len);
+ int remaining = taglen - tag_got_bytes;
+
+ if (taglen > maxsize) {
+ av_log(pls->ctx, AV_LOG_ERROR, "Too large HLS ID3 tag (%d > %"PRId64" bytes)\n",
+ taglen, maxsize);
+ break;
+ }
+
+ /*
+ * Copy the id3 tag to our temporary id3 buffer.
+ * We could read a small id3 tag directly without memcpy, but
+ * we would still need to copy the large tags, and handling
+ * both of those cases together with the possibility for multiple
+ * tags would make the handling a bit complex.
+ */
+ pls->id3_buf = av_fast_realloc(pls->id3_buf, &pls->id3_buf_size, id3_buf_pos + taglen);
+ if (!pls->id3_buf)
+ break;
+ memcpy(pls->id3_buf + id3_buf_pos, buf, tag_got_bytes);
+ id3_buf_pos += tag_got_bytes;
+
+ /* strip the intercepted bytes */
+ *len -= tag_got_bytes;
+ memmove(buf, buf + tag_got_bytes, *len);
+ av_log(pls->ctx, AV_LOG_DEBUG, "Stripped %d HLS ID3 bytes\n", tag_got_bytes);
+
+ if (remaining > 0) {
+ /* read the rest of the tag in */
+ if (read_from_url(pls, seg, pls->id3_buf + id3_buf_pos, remaining, READ_COMPLETE) != remaining)
+ break;
+ id3_buf_pos += remaining;
+ av_log(pls->ctx, AV_LOG_DEBUG, "Stripped additional %d HLS ID3 bytes\n", remaining);
+ }
+
+ } else {
+ /* no more ID3 tags */
+ break;
+ }
+ }
+
+ /* re-fill buffer for the caller unless EOF */
+ if (*len >= 0 && (fill_buf || *len == 0)) {
+ bytes = read_from_url(pls, seg, buf + *len, buf_size - *len, READ_NORMAL);
+
+ /* ignore error if we already had some data */
+ if (bytes >= 0)
+ *len += bytes;
+ else if (*len == 0)
+ *len = bytes;
+ }
+
+ if (pls->id3_buf) {
+ /* Now parse all the ID3 tags */
+ AVIOContext id3ioctx;
+ ffio_init_context(&id3ioctx, pls->id3_buf, id3_buf_pos, 0, NULL, NULL, NULL, NULL);
+ handle_id3(&id3ioctx, pls);
+ }
+
+ if (pls->is_id3_timestamped == -1)
+ pls->is_id3_timestamped = (pls->id3_mpegts_timestamp != AV_NOPTS_VALUE);
+}
+
+static int open_input(HLSContext *c, struct playlist *pls, struct segment *seg)
{
- HLSContext *c = var->parent->priv_data;
- struct segment *seg = var->segments[var->cur_seq_no - var->start_seq_no];
+ AVDictionary *opts = NULL;
+ int ret;
+
+ // 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, "headers", c->headers, 0);
+ av_dict_set(&opts, "http_proxy", c->http_proxy, 0);
+ av_dict_set(&opts, "seekable", "0", 0);
+
+ if (seg->size >= 0) {
+ /* try to restrict the HTTP request to the part we want
+ * (if this is in fact a HTTP request) */
+ av_dict_set_int(&opts, "offset", seg->url_offset, 0);
+ av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0);
+ }
+
+ av_log(pls->parent, AV_LOG_VERBOSE, "HLS request for url '%s', offset %"PRId64", playlist %d\n",
+ seg->url, seg->url_offset, pls->index);
+
if (seg->key_type == KEY_NONE) {
- return open_url(var->parent, &var->input, seg->url, c->avio_opts);
+ ret = open_url(pls->parent, &pls->input, seg->url, c->avio_opts, opts);
} else if (seg->key_type == KEY_AES_128) {
- AVDictionary *opts = NULL;
+ AVDictionary *opts2 = NULL;
char iv[33], key[33], url[MAX_URL_SIZE];
- int ret;
- if (strcmp(seg->key, var->key_url)) {
+ if (strcmp(seg->key, pls->key_url)) {
AVIOContext *pb;
- if (open_url(var->parent, &pb, seg->key, c->avio_opts) == 0) {
- ret = avio_read(pb, var->key, sizeof(var->key));
- if (ret != sizeof(var->key)) {
+ if (open_url(pls->parent, &pb, seg->key, c->avio_opts, opts) == 0) {
+ ret = avio_read(pb, pls->key, sizeof(pls->key));
+ if (ret != sizeof(pls->key)) {
av_log(NULL, AV_LOG_ERROR, "Unable to read key file %s\n",
seg->key);
}
- ff_format_io_close(var->parent, &pb);
+ ff_format_io_close(pls->parent, &pb);
} 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));
+ av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
}
ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
- ff_data_to_hex(key, var->key, sizeof(var->key), 0);
+ ff_data_to_hex(key, pls->key, sizeof(pls->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);
- av_dict_copy(&opts, c->avio_opts, 0);
- av_dict_set(&opts, "key", key, 0);
- av_dict_set(&opts, "iv", iv, 0);
+ av_dict_copy(&opts2, c->avio_opts, 0);
+ av_dict_set(&opts2, "key", key, 0);
+ av_dict_set(&opts2, "iv", iv, 0);
- ret = open_url(var->parent, &var->input, url, opts);
- av_dict_free(&opts);
+ ret = open_url(pls->parent, &pls->input, url, opts2, opts);
+
+ av_dict_free(&opts2);
+
+ if (ret < 0) {
+ goto cleanup;
+ }
+ ret = 0;
+ } else if (seg->key_type == KEY_SAMPLE_AES) {
+ av_log(pls->parent, AV_LOG_ERROR,
+ "SAMPLE-AES encryption is not supported yet\n");
+ ret = AVERROR_PATCHWELCOME;
+ }
+ else
+ ret = AVERROR(ENOSYS);
+
+ /* Seek to the requested position. If this was a HTTP request, the offset
+ * should already be where want it to, but this allows e.g. local testing
+ * without a HTTP server. */
+ if (ret == 0 && seg->key_type == KEY_NONE && seg->url_offset) {
+ int64_t seekret = avio_seek(pls->input, seg->url_offset, SEEK_SET);
+ if (seekret < 0) {
+ av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of HLS segment '%s'\n", seg->url_offset, seg->url);
+ ret = seekret;
+ ff_format_io_close(pls->parent, &pls->input);
+ }
+ }
+
+cleanup:
+ av_dict_free(&opts);
+ pls->cur_seg_offset = 0;
+ return ret;
+}
+
+static int update_init_section(struct playlist *pls, struct segment *seg)
+{
+ static const int max_init_section_size = 1024*1024;
+ HLSContext *c = pls->parent->priv_data;
+ int64_t sec_size;
+ int64_t urlsize;
+ int ret;
+
+ if (seg->init_section == pls->cur_init_section)
+ return 0;
+
+ pls->cur_init_section = NULL;
+
+ if (!seg->init_section)
+ return 0;
+
+ ret = open_input(c, pls, seg->init_section);
+ if (ret < 0) {
+ av_log(pls->parent, AV_LOG_WARNING,
+ "Failed to open an initialization section in playlist %d\n",
+ pls->index);
return ret;
}
- return AVERROR(ENOSYS);
+
+ if (seg->init_section->size >= 0)
+ sec_size = seg->init_section->size;
+ else if ((urlsize = avio_size(pls->input)) >= 0)
+ sec_size = urlsize;
+ else
+ sec_size = max_init_section_size;
+
+ av_log(pls->parent, AV_LOG_DEBUG,
+ "Downloading an initialization section of size %"PRId64"\n",
+ sec_size);
+
+ sec_size = FFMIN(sec_size, max_init_section_size);
+
+ av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size);
+
+ ret = read_from_url(pls, seg->init_section, pls->init_sec_buf,
+ pls->init_sec_buf_size, READ_COMPLETE);
+ ff_format_io_close(pls->parent, &pls->input);
+
+ if (ret < 0)
+ return ret;
+
+ pls->cur_init_section = seg->init_section;
+ pls->init_sec_data_len = ret;
+ pls->init_sec_buf_read_offset = 0;
+
+ /* spec says audio elementary streams do not have media initialization
+ * sections, so there should be no ID3 timestamps */
+ pls->is_id3_timestamped = 0;
+
+ return 0;
+}
+
+static int64_t default_reload_interval(struct playlist *pls)
+{
+ return pls->n_segments > 0 ?
+ pls->segments[pls->n_segments - 1]->duration :
+ pls->target_duration;
}
static int read_data(void *opaque, uint8_t *buf, int buf_size)
{
- struct variant *v = opaque;
+ struct playlist *v = opaque;
HLSContext *c = v->parent->priv_data;
int ret, i;
+ int just_opened = 0;
restart:
+ if (!v->needed)
+ return AVERROR_EOF;
+
if (!v->input) {
+ int64_t reload_interval;
+ struct segment *seg;
+
+ /* Check that the playlist is still needed before opening a new
+ * segment. */
+ 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 playlist %d\n",
+ v->index);
+ return AVERROR_EOF;
+ }
+
/* 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;
+ * the last playlist reload, reload the playlists now. */
+ reload_interval = default_reload_interval(v);
reload:
if (!v->finished &&
av_gettime_relative() - v->last_load_time >= reload_interval) {
- if ((ret = parse_playlist(c, v->url, v, NULL)) < 0)
+ if ((ret = parse_playlist(c, v->url, v, NULL)) < 0) {
+ av_log(v->parent, AV_LOG_WARNING, "Failed to reload playlist %d\n",
+ v->index);
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. */
goto reload;
}
- ret = open_input(v);
- if (ret < 0)
+ seg = current_segment(v);
+
+ /* load/update Media Initialization Section, if any */
+ ret = update_init_section(v, seg);
+ if (ret)
return ret;
+
+ ret = open_input(c, v, seg);
+ if (ret < 0) {
+ if (ff_check_interrupt(c->interrupt_callback))
+ return AVERROR_EXIT;
+ av_log(v->parent, AV_LOG_WARNING, "Failed to open segment of playlist %d\n",
+ v->index);
+ v->cur_seq_no += 1;
+ goto reload;
+ }
+ just_opened = 1;
}
- ret = avio_read(v->input, buf, buf_size);
- if (ret > 0)
+
+ if (v->init_sec_buf_read_offset < v->init_sec_data_len) {
+ /* Push init section out first before first actual segment */
+ int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size);
+ memcpy(buf, v->init_sec_buf, copy_size);
+ v->init_sec_buf_read_offset += copy_size;
+ return copy_size;
+ }
+
+ ret = read_from_url(v, current_segment(v), buf, buf_size, READ_NORMAL);
+ if (ret > 0) {
+ if (just_opened && v->is_id3_timestamped != 0) {
+ /* Intercept ID3 tags here, elementary audio streams are required
+ * to convey timestamps using them in the beginning of each segment. */
+ intercept_id3(v, buf, buf_size, &ret);
+ }
+
return ret;
- ff_format_io_close(c->ctx, &v->input);
+ }
+ ff_format_io_close(v->parent, &v->input);
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;
+ goto restart;
+}
+
+static int playlist_in_multiple_variants(HLSContext *c, struct playlist *pls)
+{
+ int variant_count = 0;
+ int i, j;
+
+ for (i = 0; i < c->n_variants && variant_count < 2; i++) {
+ struct variant *v = c->variants[i];
+
+ for (j = 0; j < v->n_playlists; j++) {
+ if (v->playlists[j] == pls) {
+ variant_count++;
+ break;
+ }
}
}
- if (!v->needed) {
- av_log(v->parent, AV_LOG_INFO, "No longer receiving variant %d\n",
- v->index);
- return AVERROR_EOF;
+
+ return variant_count >= 2;
+}
+
+static void add_renditions_to_variant(HLSContext *c, struct variant *var,
+ enum AVMediaType type, const char *group_id)
+{
+ int i;
+
+ for (i = 0; i < c->n_renditions; i++) {
+ struct rendition *rend = c->renditions[i];
+
+ if (rend->type == type && !strcmp(rend->group_id, group_id)) {
+
+ if (rend->playlist)
+ /* rendition is an external playlist
+ * => add the playlist to the variant */
+ dynarray_add(&var->playlists, &var->n_playlists, rend->playlist);
+ else
+ /* rendition is part of the variant main Media Playlist
+ * => add the rendition to the main Media Playlist */
+ dynarray_add(&var->playlists[0]->renditions,
+ &var->playlists[0]->n_renditions,
+ rend);
+ }
}
- goto restart;
+}
+
+static void add_metadata_from_renditions(AVFormatContext *s, struct playlist *pls,
+ enum AVMediaType type)
+{
+ int rend_idx = 0;
+ int i;
+
+ for (i = 0; i < pls->ctx->nb_streams; i++) {
+ AVStream *st = s->streams[pls->stream_offset + i];
+
+ if (st->codec->codec_type != type)
+ continue;
+
+ for (; rend_idx < pls->n_renditions; rend_idx++) {
+ struct rendition *rend = pls->renditions[rend_idx];
+
+ if (rend->type != type)
+ continue;
+
+ if (rend->language[0])
+ av_dict_set(&st->metadata, "language", rend->language, 0);
+ if (rend->name[0])
+ av_dict_set(&st->metadata, "comment", rend->name, 0);
+
+ st->disposition |= rend->disposition;
+ }
+ if (rend_idx >=pls->n_renditions)
+ break;
+ }
+}
+
+/* if timestamp was in valid range: returns 1 and sets seq_no
+ * if not: returns 0 and sets seq_no to closest segment */
+static int find_timestamp_in_playlist(HLSContext *c, struct playlist *pls,
+ int64_t timestamp, int *seq_no)
+{
+ int i;
+ int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
+ 0 : c->first_timestamp;
+
+ if (timestamp < pos) {
+ *seq_no = pls->start_seq_no;
+ return 0;
+ }
+
+ for (i = 0; i < pls->n_segments; i++) {
+ int64_t diff = pos + pls->segments[i]->duration - timestamp;
+ if (diff > 0) {
+ *seq_no = pls->start_seq_no + i;
+ return 1;
+ }
+ pos += pls->segments[i]->duration;
+ }
+
+ *seq_no = pls->start_seq_no + pls->n_segments - 1;
+
+ return 0;
+}
+
+static int select_cur_seq_no(HLSContext *c, struct playlist *pls)
+{
+ int seq_no;
+
+ if (!pls->finished && !c->first_packet &&
+ av_gettime_relative() - pls->last_load_time >= default_reload_interval(pls))
+ /* reload the playlist since it was suspended */
+ parse_playlist(c, pls->url, pls, NULL);
+
+ /* If playback is already in progress (we are just selecting a new
+ * playlist) and this is a complete file, find the matching segment
+ * by counting durations. */
+ if (pls->finished && c->cur_timestamp != AV_NOPTS_VALUE) {
+ find_timestamp_in_playlist(c, pls, c->cur_timestamp, &seq_no);
+ return seq_no;
+ }
+
+ if (!pls->finished) {
+ if (!c->first_packet && /* we are doing a segment selection during playback */
+ c->cur_seq_no >= pls->start_seq_no &&
+ c->cur_seq_no < pls->start_seq_no + pls->n_segments)
+ /* While spec 3.4.3 says that we cannot assume anything about the
+ * content at the same sequence number on different playlists,
+ * in practice this seems to work and doing it otherwise would
+ * require us to download a segment to inspect its timestamps. */
+ return c->cur_seq_no;
+
+ /* If this is a live stream, start live_start_index segments from the
+ * start or end */
+ if (c->live_start_index < 0)
+ return pls->start_seq_no + FFMAX(pls->n_segments + c->live_start_index, 0);
+ else
+ return pls->start_seq_no + FFMIN(c->live_start_index, pls->n_segments - 1);
+ }
+
+ /* Otherwise just start on the first segment. */
+ return pls->start_seq_no;
}
static int save_avio_options(AVFormatContext *s)
{
HLSContext *c = s->priv_data;
- const char *opts[] = { "headers", "user_agent", NULL }, **opt = opts;
+ const char *opts[] = {
+ "headers", "http_proxy", "user_agent", "user-agent", "cookies", NULL };
+ const char **opt = opts;
uint8_t *buf;
int ret = 0;
while (*opt) {
- if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) {
+ if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN | AV_OPT_ALLOW_NULL, &buf) >= 0) {
ret = av_dict_set(&c->avio_opts, *opt, buf,
AV_DICT_DONT_STRDUP_VAL);
if (ret < 0)
static int hls_read_header(AVFormatContext *s)
{
+ void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb;
HLSContext *c = s->priv_data;
int ret = 0, i, j, stream_offset = 0;
c->ctx = s;
c->interrupt_callback = &s->interrupt_callback;
+ c->strict_std_compliance = s->strict_std_compliance;
+
+ c->first_packet = 1;
+ c->first_timestamp = AV_NOPTS_VALUE;
+ c->cur_timestamp = AV_NOPTS_VALUE;
+
+ if (u) {
+ // get the previous user agent & set back to null if string size is zero
+ update_options(&c->user_agent, "user-agent", u);
+
+ // get the previous cookies & set back to null if string size is zero
+ update_options(&c->cookies, "cookies", u);
+
+ // get the previous headers & set back to null if string size is zero
+ update_options(&c->headers, "headers", u);
+
+ // get the previous http proxt & set back to null if string size is zero
+ update_options(&c->http_proxy, "http_proxy", u);
+ }
if ((ret = parse_playlist(c, s->filename, NULL, s->pb)) < 0)
goto fail;
if ((ret = save_avio_options(s)) < 0)
goto fail;
+ /* Some HLS servers don't like being sent the range header */
+ av_dict_set(&c->avio_opts, "seekable", "0", 0);
+
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)
+ /* If the playlist only contained playlists (Master Playlist),
+ * parse each individual playlist. */
+ if (c->n_playlists > 1 || c->playlists[0]->n_segments == 0) {
+ for (i = 0; i < c->n_playlists; i++) {
+ struct playlist *pls = c->playlists[i];
+ if ((ret = parse_playlist(c, pls->url, pls, NULL)) < 0)
goto fail;
}
}
- if (c->variants[0]->n_segments == 0) {
+ if (c->variants[0]->playlists[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) {
+ if (c->variants[0]->playlists[0]->finished) {
int64_t duration = 0;
- for (i = 0; i < c->variants[0]->n_segments; i++)
- duration += c->variants[0]->segments[i]->duration;
+ for (i = 0; i < c->variants[0]->playlists[0]->n_segments; i++)
+ duration += c->variants[0]->playlists[0]->segments[i]->duration;
s->duration = duration;
}
- /* Open the demuxer for each variant */
+ /* Associate renditions with variants */
for (i = 0; i < c->n_variants; i++) {
- struct variant *v = c->variants[i];
- AVInputFormat *in_fmt = NULL;
- char bitrate_str[20];
- AVProgram *program;
+ struct variant *var = c->variants[i];
- if (v->n_segments == 0)
- continue;
+ if (var->audio_group[0])
+ add_renditions_to_variant(c, var, AVMEDIA_TYPE_AUDIO, var->audio_group);
+ if (var->video_group[0])
+ add_renditions_to_variant(c, var, AVMEDIA_TYPE_VIDEO, var->video_group);
+ if (var->subtitles_group[0])
+ add_renditions_to_variant(c, var, AVMEDIA_TYPE_SUBTITLE, var->subtitles_group);
+ }
- if (!(v->ctx = avformat_alloc_context())) {
+ /* Open the demuxer for each playlist */
+ for (i = 0; i < c->n_playlists; i++) {
+ struct playlist *pls = c->playlists[i];
+ AVInputFormat *in_fmt = NULL;
+
+ if (!(pls->ctx = avformat_alloc_context())) {
ret = AVERROR(ENOMEM);
goto fail;
}
- v->index = i;
- v->needed = 1;
- v->parent = s;
+ if (pls->n_segments == 0)
+ continue;
- /* 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;
+ pls->index = i;
+ pls->needed = 1;
+ pls->parent = s;
+ pls->cur_seq_no = select_cur_seq_no(c, pls);
- v->read_buffer = av_malloc(INITIAL_BUFFER_SIZE);
- ffio_init_context(&v->pb, v->read_buffer, INITIAL_BUFFER_SIZE, 0, v,
+ pls->read_buffer = av_malloc(INITIAL_BUFFER_SIZE);
+ if (!pls->read_buffer){
+ ret = AVERROR(ENOMEM);
+ avformat_free_context(pls->ctx);
+ pls->ctx = NULL;
+ goto fail;
+ }
+ ffio_init_context(&pls->pb, pls->read_buffer, INITIAL_BUFFER_SIZE, 0, pls,
read_data, NULL, NULL);
- v->pb.seekable = 0;
- ret = av_probe_input_buffer(&v->pb, &in_fmt, v->segments[0]->url,
+ pls->pb.seekable = 0;
+ ret = av_probe_input_buffer(&pls->pb, &in_fmt, pls->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. */
- avformat_free_context(v->ctx);
- v->ctx = NULL;
+ av_log(s, AV_LOG_ERROR, "Error when loading first segment '%s'\n", pls->segments[0]->url);
+ avformat_free_context(pls->ctx);
+ pls->ctx = NULL;
goto fail;
}
- v->ctx->pb = &v->pb;
- v->ctx->io_open = nested_io_open;
- v->stream_offset = stream_offset;
- ret = avformat_open_input(&v->ctx, v->segments[0]->url, in_fmt, NULL);
- if (ret < 0)
+ pls->ctx->pb = &pls->pb;
+ pls->ctx->io_open = nested_io_open;
+ pls->stream_offset = stream_offset;
+
+ if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0)
goto fail;
- v->ctx->ctx_flags &= ~AVFMTCTX_NOHEADER;
- ret = avformat_find_stream_info(v->ctx, NULL);
+ ret = avformat_open_input(&pls->ctx, pls->segments[0]->url, in_fmt, NULL);
if (ret < 0)
goto fail;
- snprintf(bitrate_str, sizeof(bitrate_str), "%d", v->bandwidth);
- program = av_new_program(s, i);
- if (!program)
+ if (pls->id3_deferred_extra && pls->ctx->nb_streams == 1) {
+ ff_id3v2_parse_apic(pls->ctx, &pls->id3_deferred_extra);
+ avformat_queue_attached_pictures(pls->ctx);
+ ff_id3v2_free_extra_meta(&pls->id3_deferred_extra);
+ pls->id3_deferred_extra = NULL;
+ }
+
+ pls->ctx->ctx_flags &= ~AVFMTCTX_NOHEADER;
+ ret = avformat_find_stream_info(pls->ctx, NULL);
+ if (ret < 0)
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++) {
+ if (pls->is_id3_timestamped == -1)
+ av_log(s, AV_LOG_WARNING, "No expected HTTP requests have been made\n");
+
+ /* Create new AVStreams for each stream in this playlist */
+ for (j = 0; j < pls->ctx->nb_streams; j++) {
AVStream *st = avformat_new_stream(s, NULL);
- AVStream *ist = v->ctx->streams[j];
+ AVStream *ist = pls->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);
+
+ avcodec_copy_context(st->codec, pls->ctx->streams[j]->codec);
+
+ if (pls->is_id3_timestamped) /* custom timestamps via id3 */
+ avpriv_set_pts_info(st, 33, 1, MPEG_TIME_BASE);
+ else
+ avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den);
}
- stream_offset += v->ctx->nb_streams;
+
+ add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_AUDIO);
+ add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_VIDEO);
+ add_metadata_from_renditions(s, pls, AVMEDIA_TYPE_SUBTITLE);
+
+ stream_offset += pls->ctx->nb_streams;
}
- c->first_packet = 1;
- c->first_timestamp = AV_NOPTS_VALUE;
- c->seek_timestamp = AV_NOPTS_VALUE;
+ /* Create a program for each variant */
+ for (i = 0; i < c->n_variants; i++) {
+ struct variant *v = c->variants[i];
+ AVProgram *program;
+
+ program = av_new_program(s, i);
+ if (!program)
+ goto fail;
+ av_dict_set_int(&program->metadata, "variant_bitrate", v->bandwidth, 0);
+
+ for (j = 0; j < v->n_playlists; j++) {
+ struct playlist *pls = v->playlists[j];
+ int is_shared = playlist_in_multiple_variants(c, pls);
+ int k;
+
+ for (k = 0; k < pls->ctx->nb_streams; k++) {
+ struct AVStream *st = s->streams[pls->stream_offset + k];
+
+ av_program_add_stream_index(s, i, pls->stream_offset + k);
+
+ /* Set variant_bitrate for streams unique to this variant */
+ if (!is_shared && v->bandwidth)
+ av_dict_set_int(&st->metadata, "variant_bitrate", v->bandwidth, 0);
+ }
+ }
+ }
return 0;
fail:
+ free_playlist_list(c);
free_variant_list(c);
+ free_rendition_list(c);
return ret;
}
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 < c->n_playlists; i++)
+ c->playlists[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];
+ struct playlist *pls = c->playlists[s->streams[i]->id];
if (st->discard < AVDISCARD_ALL)
- var->cur_needed = 1;
+ pls->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;
+ for (i = 0; i < c->n_playlists; i++) {
+ struct playlist *pls = c->playlists[i];
+ if (pls->cur_needed && !pls->needed) {
+ pls->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)
- ff_format_io_close(s, &v->input);
- v->needed = 0;
+ pls->cur_seq_no = select_cur_seq_no(c, pls);
+ pls->pb.eof_reached = 0;
+ if (c->cur_timestamp != AV_NOPTS_VALUE) {
+ /* catch up */
+ pls->seek_timestamp = c->cur_timestamp;
+ pls->seek_flags = AVSEEK_FLAG_ANY;
+ pls->seek_stream_index = -1;
+ }
+ av_log(s, AV_LOG_INFO, "Now receiving playlist %d, segment %d\n", i, pls->cur_seq_no);
+ } else if (first && !pls->cur_needed && pls->needed) {
+ if (pls->input)
+ ff_format_io_close(pls->parent, &pls->input);
+ pls->needed = 0;
changed = 1;
- av_log(s, AV_LOG_INFO, "No longer receiving variant %d\n", i);
+ av_log(s, AV_LOG_INFO, "No longer receiving playlist %d\n", i);
}
}
return changed;
}
+static void fill_timing_for_id3_timestamped_stream(struct playlist *pls)
+{
+ if (pls->id3_offset >= 0) {
+ pls->pkt.dts = pls->id3_mpegts_timestamp +
+ av_rescale_q(pls->id3_offset,
+ pls->ctx->streams[pls->pkt.stream_index]->time_base,
+ MPEG_TIME_BASE_Q);
+ if (pls->pkt.duration)
+ pls->id3_offset += pls->pkt.duration;
+ else
+ pls->id3_offset = -1;
+ } else {
+ /* there have been packets with unknown duration
+ * since the last id3 tag, should not normally happen */
+ pls->pkt.dts = AV_NOPTS_VALUE;
+ }
+
+ if (pls->pkt.duration)
+ pls->pkt.duration = av_rescale_q(pls->pkt.duration,
+ pls->ctx->streams[pls->pkt.stream_index]->time_base,
+ MPEG_TIME_BASE_Q);
+
+ pls->pkt.pts = AV_NOPTS_VALUE;
+}
+
+static AVRational get_timebase(struct playlist *pls)
+{
+ if (pls->is_id3_timestamped)
+ return MPEG_TIME_BASE_Q;
+
+ return pls->ctx->streams[pls->pkt.stream_index]->time_base;
+}
+
+static int compare_ts_with_wrapdetect(int64_t ts_a, struct playlist *pls_a,
+ int64_t ts_b, struct playlist *pls_b)
+{
+ int64_t scaled_ts_a = av_rescale_q(ts_a, get_timebase(pls_a), MPEG_TIME_BASE_Q);
+ int64_t scaled_ts_b = av_rescale_q(ts_b, get_timebase(pls_b), MPEG_TIME_BASE_Q);
+
+ return av_compare_mod(scaled_ts_a, scaled_ts_b, 1LL << 33);
+}
+
static int hls_read_packet(AVFormatContext *s, AVPacket *pkt)
{
HLSContext *c = s->priv_data;
- int ret, i, minvariant = -1;
+ int ret, i, minplaylist = -1;
- if (c->first_packet) {
- recheck_discard_flags(s, 1);
- c->first_packet = 0;
- }
+ recheck_discard_flags(s, c->first_packet);
+ 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
+ for (i = 0; i < c->n_playlists; i++) {
+ struct playlist *pls = c->playlists[i];
+ /* Make sure we've got one buffered packet from each open playlist
* stream */
- if (var->needed && !var->pkt.data) {
+ if (pls->needed && !pls->pkt.data) {
while (1) {
int64_t ts_diff;
- AVStream *st;
- ret = av_read_frame(var->ctx, &var->pkt);
+ AVRational tb;
+ ret = av_read_frame(pls->ctx, &pls->pkt);
if (ret < 0) {
- if (!var->pb.eof_reached)
+ if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
return ret;
- reset_packet(&var->pkt);
+ reset_packet(&pls->pkt);
break;
} else {
+ /* stream_index check prevents matching picture attachments etc. */
+ if (pls->is_id3_timestamped && pls->pkt.stream_index == 0) {
+ /* audio elementary streams are id3 timestamped */
+ fill_timing_for_id3_timestamped_stream(pls);
+ }
+
if (c->first_timestamp == AV_NOPTS_VALUE &&
- var->pkt.dts != AV_NOPTS_VALUE)
- c->first_timestamp = av_rescale_q(var->pkt.dts,
- var->ctx->streams[var->pkt.stream_index]->time_base,
- AV_TIME_BASE_Q);
+ pls->pkt.dts != AV_NOPTS_VALUE)
+ c->first_timestamp = av_rescale_q(pls->pkt.dts,
+ get_timebase(pls), AV_TIME_BASE_Q);
}
- if (c->seek_timestamp == AV_NOPTS_VALUE)
+ if (pls->seek_timestamp == AV_NOPTS_VALUE)
break;
- if (var->pkt.dts == AV_NOPTS_VALUE) {
- c->seek_timestamp = AV_NOPTS_VALUE;
- break;
- }
+ if (pls->seek_stream_index < 0 ||
+ pls->seek_stream_index == pls->pkt.stream_index) {
- 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;
+ if (pls->pkt.dts == AV_NOPTS_VALUE) {
+ pls->seek_timestamp = AV_NOPTS_VALUE;
+ break;
+ }
+
+ tb = get_timebase(pls);
+ ts_diff = av_rescale_rnd(pls->pkt.dts, AV_TIME_BASE,
+ tb.den, AV_ROUND_DOWN) -
+ pls->seek_timestamp;
+ if (ts_diff >= 0 && (pls->seek_flags & AVSEEK_FLAG_ANY ||
+ pls->pkt.flags & AV_PKT_FLAG_KEY)) {
+ pls->seek_timestamp = AV_NOPTS_VALUE;
+ break;
+ }
}
- av_packet_unref(&var->pkt);
- reset_packet(&var->pkt);
+ av_packet_unref(&pls->pkt);
+ reset_packet(&pls->pkt);
}
}
- /* Check if this stream still is on an earlier segment number, or
- * has the packet with the lowest dts */
- if (var->pkt.data) {
- struct variant *minvar = minvariant < 0 ?
- NULL : c->variants[minvariant];
- if (minvariant < 0 || var->cur_seq_no < minvar->cur_seq_no) {
- minvariant = i;
- } else if (var->cur_seq_no == minvar->cur_seq_no) {
- 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 (dts == AV_NOPTS_VALUE) {
- minvariant = i;
- } else if (mindts != AV_NOPTS_VALUE) {
- 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;
- }
+ /* Check if this stream has the packet with the lowest dts */
+ if (pls->pkt.data) {
+ struct playlist *minpls = minplaylist < 0 ?
+ NULL : c->playlists[minplaylist];
+ if (minplaylist < 0) {
+ minplaylist = i;
+ } else {
+ int64_t dts = pls->pkt.dts;
+ int64_t mindts = minpls->pkt.dts;
+
+ if (dts == AV_NOPTS_VALUE ||
+ (mindts != AV_NOPTS_VALUE && compare_ts_with_wrapdetect(dts, pls, mindts, minpls) < 0))
+ minplaylist = 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);
+ if (minplaylist >= 0) {
+ struct playlist *pls = c->playlists[minplaylist];
+ *pkt = pls->pkt;
+ pkt->stream_index += pls->stream_offset;
+ reset_packet(&c->playlists[minplaylist]->pkt);
+
+ if (pkt->dts != AV_NOPTS_VALUE)
+ c->cur_timestamp = av_rescale_q(pkt->dts,
+ pls->ctx->streams[pls->pkt.stream_index]->time_base,
+ AV_TIME_BASE_Q);
+
return 0;
}
return AVERROR_EOF;
{
HLSContext *c = s->priv_data;
+ free_playlist_list(c);
free_variant_list(c);
+ free_rendition_list(c);
av_dict_free(&c->avio_opts);
int64_t timestamp, int flags)
{
HLSContext *c = s->priv_data;
- int i, j, ret;
+ struct playlist *seek_pls = NULL;
+ int i, seq_no;
+ int64_t first_timestamp, seek_timestamp, duration;
- if ((flags & AVSEEK_FLAG_BYTE) || !c->variants[0]->finished)
+ if ((flags & AVSEEK_FLAG_BYTE) ||
+ !(c->variants[0]->playlists[0]->finished || c->variants[0]->playlists[0]->type == PLS_TYPE_EVENT))
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, AV_TIME_BASE, 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;
+ first_timestamp = c->first_timestamp == AV_NOPTS_VALUE ?
+ 0 : c->first_timestamp;
+
+ seek_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);
+
+ duration = s->duration == AV_NOPTS_VALUE ?
+ 0 : s->duration;
+
+ if (0 < duration && duration < seek_timestamp - first_timestamp)
return AVERROR(EIO);
+
+ /* find the playlist with the specified stream */
+ for (i = 0; i < c->n_playlists; i++) {
+ struct playlist *pls = c->playlists[i];
+ if (stream_index >= pls->stream_offset &&
+ stream_index - pls->stream_offset < pls->ctx->nb_streams) {
+ seek_pls = pls;
+ break;
+ }
}
+ /* check if the timestamp is valid for the playlist with the
+ * specified stream index */
+ if (!seek_pls || !find_timestamp_in_playlist(c, seek_pls, seek_timestamp, &seq_no))
+ return AVERROR(EIO);
- ret = AVERROR(EIO);
- for (i = 0; i < c->n_variants; i++) {
+ /* set segment now so we do not need to search again below */
+ seek_pls->cur_seq_no = seq_no;
+ seek_pls->seek_stream_index = stream_index - seek_pls->stream_offset;
+
+ for (i = 0; i < c->n_playlists; i++) {
/* Reset reading */
- struct variant *var = c->variants[i];
- int64_t pos = c->first_timestamp == AV_NOPTS_VALUE ?
- 0 : c->first_timestamp;
- if (var->input)
- ff_format_io_close(s, &var->input);
- av_packet_unref(&var->pkt);
- reset_packet(&var->pkt);
- var->pb.eof_reached = 0;
+ struct playlist *pls = c->playlists[i];
+ if (pls->input)
+ ff_format_io_close(pls->parent, &pls->input);
+ av_packet_unref(&pls->pkt);
+ reset_packet(&pls->pkt);
+ pls->pb.eof_reached = 0;
/* Clear any buffered data */
- var->pb.buf_end = var->pb.buf_ptr = var->pb.buffer;
+ pls->pb.buf_end = pls->pb.buf_ptr = pls->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;
+ pls->pb.pos = 0;
+ /* Flush the packet queue of the subdemuxer. */
+ ff_read_frame_flush(pls->ctx);
+
+ pls->seek_timestamp = seek_timestamp;
+ pls->seek_flags = flags;
+
+ if (pls != seek_pls) {
+ /* set closest segment seq_no for playlists not handled above */
+ find_timestamp_in_playlist(c, pls, seek_timestamp, &pls->cur_seq_no);
+ /* seek the playlist to the given position without taking
+ * keyframes into account since this playlist does not have the
+ * specified stream where we should look for the keyframes */
+ pls->seek_stream_index = -1;
+ pls->seek_flags |= AVSEEK_FLAG_ANY;
}
- if (ret)
- c->seek_timestamp = AV_NOPTS_VALUE;
}
- return ret;
+
+ c->cur_timestamp = seek_timestamp;
+
+ return 0;
}
static int hls_probe(AVProbeData *p)
* 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 0;
}
+#define OFFSET(x) offsetof(HLSContext, x)
+#define FLAGS AV_OPT_FLAG_DECODING_PARAM
+static const AVOption hls_options[] = {
+ {"live_start_index", "segment index to start live streams at (negative values are from the end)",
+ OFFSET(live_start_index), AV_OPT_TYPE_INT, {.i64 = -3}, INT_MIN, INT_MAX, FLAGS},
+ {NULL}
+};
+
+static const AVClass hls_class = {
+ .class_name = "hls,applehttp",
+ .item_name = av_default_item_name,
+ .option = hls_options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
AVInputFormat ff_hls_demuxer = {
.name = "hls,applehttp",
.long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
+ .priv_class = &hls_class,
.priv_data_size = sizeof(HLSContext),
.read_probe = hls_probe,
.read_header = hls_read_header,
projects / ffmpeg / blobdiff