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hlsenc.c
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/*
* Apple HTTP Live Streaming segmenter
* Copyright (c) 2012, Luca Barbato
* Copyright (c) 2017 Akamai Technologies, Inc.
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "config_components.h"
#include <stdint.h>
#include <time.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "libavutil/avassert.h"
#include "libavutil/mathematics.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/log.h"
#include "libavutil/random_seed.h"
#include "libavutil/time.h"
#include "libavutil/time_internal.h"
#include "libavcodec/defs.h"
#include "avformat.h"
#include "avio_internal.h"
#include "avc.h"
#if CONFIG_HTTP_PROTOCOL
#include "http.h"
#endif
#include "hlsplaylist.h"
#include "internal.h"
#include "mux.h"
#include "os_support.h"
#include "url.h"
typedef enum {
HLS_START_SEQUENCE_AS_START_NUMBER = 0,
HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH = 1,
HLS_START_SEQUENCE_AS_FORMATTED_DATETIME = 2, // YYYYMMDDhhmmss
HLS_START_SEQUENCE_AS_MICROSECONDS_SINCE_EPOCH = 3,
HLS_START_SEQUENCE_LAST, // unused
} StartSequenceSourceType;
typedef enum {
CODEC_ATTRIBUTE_WRITTEN = 0,
CODEC_ATTRIBUTE_WILL_NOT_BE_WRITTEN,
} CodecAttributeStatus;
#define KEYSIZE 16
#define LINE_BUFFER_SIZE MAX_URL_SIZE
#define HLS_MICROSECOND_UNIT 1000000
#define BUFSIZE (16 * 1024)
#define POSTFIX_PATTERN "_%d"
typedef struct HLSSegment {
char filename[MAX_URL_SIZE];
char sub_filename[MAX_URL_SIZE];
double duration; /* in seconds */
int discont;
int64_t pos;
int64_t size;
int64_t keyframe_pos;
int64_t keyframe_size;
unsigned var_stream_idx;
char key_uri[LINE_BUFFER_SIZE + 1];
char iv_string[KEYSIZE*2 + 1];
struct HLSSegment *next;
double discont_program_date_time;
} HLSSegment;
typedef enum HLSFlags {
// Generate a single media file and use byte ranges in the playlist.
HLS_SINGLE_FILE = (1 << 0),
HLS_DELETE_SEGMENTS = (1 << 1),
HLS_ROUND_DURATIONS = (1 << 2),
HLS_DISCONT_START = (1 << 3),
HLS_OMIT_ENDLIST = (1 << 4),
HLS_SPLIT_BY_TIME = (1 << 5),
HLS_APPEND_LIST = (1 << 6),
HLS_PROGRAM_DATE_TIME = (1 << 7),
HLS_SECOND_LEVEL_SEGMENT_INDEX = (1 << 8), // include segment index in segment filenames when use_localtime e.g.: %%03d
HLS_SECOND_LEVEL_SEGMENT_DURATION = (1 << 9), // include segment duration (microsec) in segment filenames when use_localtime e.g.: %%09t
HLS_SECOND_LEVEL_SEGMENT_SIZE = (1 << 10), // include segment size (bytes) in segment filenames when use_localtime e.g.: %%014s
HLS_TEMP_FILE = (1 << 11),
HLS_PERIODIC_REKEY = (1 << 12),
HLS_INDEPENDENT_SEGMENTS = (1 << 13),
HLS_I_FRAMES_ONLY = (1 << 14),
} HLSFlags;
typedef enum {
SEGMENT_TYPE_MPEGTS,
SEGMENT_TYPE_FMP4,
} SegmentType;
typedef struct VariantStream {
unsigned var_stream_idx;
unsigned number;
int64_t sequence;
const AVOutputFormat *oformat;
const AVOutputFormat *vtt_oformat;
AVIOContext *out;
AVIOContext *out_single_file;
int packets_written;
int init_range_length;
uint8_t *temp_buffer;
uint8_t *init_buffer;
AVFormatContext *avf;
AVFormatContext *vtt_avf;
int has_video;
int has_subtitle;
int new_start;
int start_pts_from_audio;
double dpp; // duration per packet
int64_t start_pts;
int64_t end_pts;
int64_t video_lastpos;
int64_t video_keyframe_pos;
int64_t video_keyframe_size;
double duration; // last segment duration computed so far, in seconds
int64_t start_pos; // last segment starting position
int64_t size; // last segment size
int nb_entries;
int discontinuity_set;
int discontinuity;
int reference_stream_index;
HLSSegment *segments;
HLSSegment *last_segment;
HLSSegment *old_segments;
char *basename_tmp;
char *basename;
char *vtt_basename;
char *vtt_m3u8_name;
char *m3u8_name;
double initial_prog_date_time;
char current_segment_final_filename_fmt[MAX_URL_SIZE]; // when renaming segments
char *fmp4_init_filename;
char *base_output_dirname;
int encrypt_started;
char key_file[LINE_BUFFER_SIZE + 1];
char key_uri[LINE_BUFFER_SIZE + 1];
char key_string[KEYSIZE*2 + 1];
char iv_string[KEYSIZE*2 + 1];
AVStream **streams;
char codec_attr[128];
CodecAttributeStatus attr_status;
unsigned int nb_streams;
int m3u8_created; /* status of media play-list creation */
int is_default; /* default status of audio group */
const char *language; /* audio language name */
const char *agroup; /* audio group name */
const char *sgroup; /* subtitle group name */
const char *ccgroup; /* closed caption group name */
const char *varname; /* variant name */
} VariantStream;
typedef struct ClosedCaptionsStream {
const char *ccgroup; /* closed caption group name */
const char *instreamid; /* closed captions INSTREAM-ID */
const char *language; /* closed captions language */
} ClosedCaptionsStream;
typedef struct HLSContext {
const AVClass *class; // Class for private options.
int64_t start_sequence;
uint32_t start_sequence_source_type; // enum StartSequenceSourceType
int64_t time; // Set by a private option.
int64_t init_time; // Set by a private option.
int max_nb_segments; // Set by a private option.
int hls_delete_threshold; // Set by a private option.
uint32_t flags; // enum HLSFlags
uint32_t pl_type; // enum PlaylistType
char *segment_filename;
char *fmp4_init_filename;
int segment_type;
int resend_init_file; ///< resend init file into disk after refresh m3u8
int use_localtime; ///< flag to expand filename with localtime
int use_localtime_mkdir;///< flag to mkdir dirname in timebased filename
int allowcache;
int64_t recording_time;
int64_t max_seg_size; // every segment file max size
char *baseurl;
char *vtt_format_options_str;
char *subtitle_filename;
AVDictionary *format_options;
int encrypt;
char *key;
char *key_url;
char *iv;
char *key_basename;
int encrypt_started;
char *key_info_file;
char key_file[LINE_BUFFER_SIZE + 1];
char key_uri[LINE_BUFFER_SIZE + 1];
char key_string[KEYSIZE*2 + 1];
char iv_string[KEYSIZE*2 + 1];
AVDictionary *vtt_format_options;
char *method;
char *user_agent;
VariantStream *var_streams;
unsigned int nb_varstreams;
ClosedCaptionsStream *cc_streams;
unsigned int nb_ccstreams;
int master_m3u8_created; /* status of master play-list creation */
char *master_m3u8_url; /* URL of the master m3u8 file */
int version; /* HLS version */
char *var_stream_map; /* user specified variant stream map string */
char *cc_stream_map; /* user specified closed caption streams map string */
char *master_pl_name;
unsigned int master_publish_rate;
int http_persistent;
AVIOContext *m3u8_out;
AVIOContext *sub_m3u8_out;
AVIOContext *http_delete;
int64_t timeout;
int ignore_io_errors;
char *headers;
int has_default_key; /* has DEFAULT field of var_stream_map */
int has_video_m3u8; /* has video stream m3u8 list */
} HLSContext;
static int strftime_expand(const char *fmt, char **dest)
{
int r = 1;
time_t now0;
struct tm *tm, tmpbuf;
char *buf;
buf = av_mallocz(MAX_URL_SIZE);
if (!buf)
return AVERROR(ENOMEM);
time(&now0);
tm = localtime_r(&now0, &tmpbuf);
r = strftime(buf, MAX_URL_SIZE, fmt, tm);
if (!r) {
av_free(buf);
return AVERROR(EINVAL);
}
*dest = buf;
return r;
}
static int hlsenc_io_open(AVFormatContext *s, AVIOContext **pb, const char *filename,
AVDictionary **options)
{
HLSContext *hls = s->priv_data;
int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
int err = AVERROR_MUXER_NOT_FOUND;
if (!*pb || !http_base_proto || !hls->http_persistent) {
err = s->io_open(s, pb, filename, AVIO_FLAG_WRITE, options);
#if CONFIG_HTTP_PROTOCOL
} else {
URLContext *http_url_context = ffio_geturlcontext(*pb);
av_assert0(http_url_context);
err = ff_http_do_new_request(http_url_context, filename);
if (err < 0)
ff_format_io_close(s, pb);
#endif
}
return err;
}
static int hlsenc_io_close(AVFormatContext *s, AVIOContext **pb, char *filename)
{
HLSContext *hls = s->priv_data;
int http_base_proto = filename ? ff_is_http_proto(filename) : 0;
int ret = 0;
if (!*pb)
return ret;
if (!http_base_proto || !hls->http_persistent || hls->key_info_file || hls->encrypt) {
ff_format_io_close(s, pb);
#if CONFIG_HTTP_PROTOCOL
} else {
URLContext *http_url_context = ffio_geturlcontext(*pb);
av_assert0(http_url_context);
avio_flush(*pb);
ret = ffurl_shutdown(http_url_context, AVIO_FLAG_WRITE);
#endif
}
return ret;
}
static void set_http_options(AVFormatContext *s, AVDictionary **options, HLSContext *c)
{
int http_base_proto = ff_is_http_proto(s->url);
if (c->method) {
av_dict_set(options, "method", c->method, 0);
} else if (http_base_proto) {
av_dict_set(options, "method", "PUT", 0);
}
if (c->user_agent)
av_dict_set(options, "user_agent", c->user_agent, 0);
if (c->http_persistent)
av_dict_set_int(options, "multiple_requests", 1, 0);
if (c->timeout >= 0)
av_dict_set_int(options, "timeout", c->timeout, 0);
if (c->headers)
av_dict_set(options, "headers", c->headers, 0);
}
static void write_codec_attr(AVStream *st, VariantStream *vs)
{
int codec_strlen = strlen(vs->codec_attr);
char attr[32];
if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
return;
if (vs->attr_status == CODEC_ATTRIBUTE_WILL_NOT_BE_WRITTEN)
return;
if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
uint8_t *data = st->codecpar->extradata;
if (data) {
const uint8_t *p;
if (AV_RB32(data) == 0x01 && (data[4] & 0x1F) == 7)
p = &data[5];
else if (AV_RB24(data) == 0x01 && (data[3] & 0x1F) == 7)
p = &data[4];
else if (data[0] == 0x01) /* avcC */
p = &data[1];
else
goto fail;
snprintf(attr, sizeof(attr),
"avc1.%02x%02x%02x", p[0], p[1], p[2]);
} else {
goto fail;
}
} else if (st->codecpar->codec_id == AV_CODEC_ID_HEVC) {
uint8_t *data = st->codecpar->extradata;
int profile = AV_PROFILE_UNKNOWN;
int level = AV_LEVEL_UNKNOWN;
if (st->codecpar->profile != AV_PROFILE_UNKNOWN)
profile = st->codecpar->profile;
if (st->codecpar->level != AV_LEVEL_UNKNOWN)
level = st->codecpar->level;
/* check the boundary of data which from current position is small than extradata_size */
while (data && (data - st->codecpar->extradata + 19) < st->codecpar->extradata_size) {
/* get HEVC SPS NAL and seek to profile_tier_level */
if (!(data[0] | data[1] | data[2]) && data[3] == 1 && ((data[4] & 0x7E) == 0x42)) {
uint8_t *rbsp_buf;
int remain_size = 0;
int rbsp_size = 0;
/* skip start code + nalu header */
data += 6;
/* process by reference General NAL unit syntax */
remain_size = st->codecpar->extradata_size - (data - st->codecpar->extradata);
rbsp_buf = ff_nal_unit_extract_rbsp(data, remain_size, &rbsp_size, 0);
if (!rbsp_buf)
return;
if (rbsp_size < 13) {
av_freep(&rbsp_buf);
break;
}
/* skip sps_video_parameter_set_id u(4),
* sps_max_sub_layers_minus1 u(3),
* and sps_temporal_id_nesting_flag u(1) */
profile = rbsp_buf[1] & 0x1f;
/* skip 8 + 8 + 32 + 4 + 43 + 1 bit */
level = rbsp_buf[12];
av_freep(&rbsp_buf);
break;
}
data++;
}
if (st->codecpar->codec_tag == MKTAG('h','v','c','1') &&
profile != AV_PROFILE_UNKNOWN &&
level != AV_LEVEL_UNKNOWN) {
snprintf(attr, sizeof(attr), "%s.%d.4.L%d.B01", av_fourcc2str(st->codecpar->codec_tag), profile, level);
} else
goto fail;
} else if (st->codecpar->codec_id == AV_CODEC_ID_MP2) {
snprintf(attr, sizeof(attr), "mp4a.40.33");
} else if (st->codecpar->codec_id == AV_CODEC_ID_MP3) {
snprintf(attr, sizeof(attr), "mp4a.40.34");
} else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
if (st->codecpar->profile != AV_PROFILE_UNKNOWN)
snprintf(attr, sizeof(attr), "mp4a.40.%d", st->codecpar->profile+1);
else
// This is for backward compatibility with the previous implementation.
snprintf(attr, sizeof(attr), "mp4a.40.2");
} else if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
snprintf(attr, sizeof(attr), "ac-3");
} else if (st->codecpar->codec_id == AV_CODEC_ID_EAC3) {
snprintf(attr, sizeof(attr), "ec-3");
} else {
goto fail;
}
// Don't write the same attribute multiple times
if (!av_stristr(vs->codec_attr, attr)) {
snprintf(vs->codec_attr + codec_strlen,
sizeof(vs->codec_attr) - codec_strlen,
"%s%s", codec_strlen ? "," : "", attr);
}
return;
fail:
vs->codec_attr[0] = '\0';
vs->attr_status = CODEC_ATTRIBUTE_WILL_NOT_BE_WRITTEN;
return;
}
static int replace_str_data_in_filename(char **s, const char *filename, char placeholder, const char *datastring)
{
const char *p;
char c;
int addchar_count;
int found_count = 0;
AVBPrint buf;
int ret;
av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
p = filename;
for (;;) {
c = *p;
if (c == '\0')
break;
if (c == '%' && *(p+1) == '%') // %%
addchar_count = 2;
else if (c == '%' && *(p+1) == placeholder) {
av_bprintf(&buf, "%s", datastring);
p += 2;
addchar_count = 0;
found_count ++;
} else
addchar_count = 1;
if (addchar_count > 0) {
av_bprint_append_data(&buf, p, addchar_count);
p += addchar_count;
}
}
if (!av_bprint_is_complete(&buf)) {
av_bprint_finalize(&buf, NULL);
return AVERROR(ENOMEM);
}
if ((ret = av_bprint_finalize(&buf, s)) < 0)
return ret;
return found_count;
}
static int replace_int_data_in_filename(char **s, const char *filename, char placeholder, int64_t number)
{
const char *p;
char c;
int nd, addchar_count;
int found_count = 0;
AVBPrint buf;
int ret;
av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
p = filename;
for (;;) {
c = *p;
if (c == '\0')
break;
if (c == '%' && *(p+1) == '%') // %%
addchar_count = 2;
else if (c == '%' && (av_isdigit(*(p+1)) || *(p+1) == placeholder)) {
nd = 0;
addchar_count = 1;
while (av_isdigit(*(p + addchar_count))) {
nd = nd * 10 + *(p + addchar_count) - '0';
addchar_count++;
}
if (*(p + addchar_count) == placeholder) {
av_bprintf(&buf, "%0*"PRId64, (number < 0) ? nd : nd++, number);
p += (addchar_count + 1);
addchar_count = 0;
found_count++;
}
} else
addchar_count = 1;
av_bprint_append_data(&buf, p, addchar_count);
p += addchar_count;
}
if (!av_bprint_is_complete(&buf)) {
av_bprint_finalize(&buf, NULL);
return AVERROR(ENOMEM);
}
if ((ret = av_bprint_finalize(&buf, s)) < 0)
return ret;
return found_count;
}
static void write_styp(AVIOContext *pb)
{
avio_wb32(pb, 24);
ffio_wfourcc(pb, "styp");
ffio_wfourcc(pb, "msdh");
avio_wb32(pb, 0); /* minor */
ffio_wfourcc(pb, "msdh");
ffio_wfourcc(pb, "msix");
}
static int flush_dynbuf(VariantStream *vs, int *range_length)
{
AVFormatContext *ctx = vs->avf;
if (!ctx->pb) {
return AVERROR(EINVAL);
}
// flush
av_write_frame(ctx, NULL);
// write out to file
*range_length = avio_close_dyn_buf(ctx->pb, &vs->temp_buffer);
ctx->pb = NULL;
avio_write(vs->out, vs->temp_buffer, *range_length);
avio_flush(vs->out);
// re-open buffer
return avio_open_dyn_buf(&ctx->pb);
}
static void reflush_dynbuf(VariantStream *vs, int *range_length)
{
// re-open buffer
avio_write(vs->out, vs->temp_buffer, *range_length);
}
static int hls_delete_file(HLSContext *hls, AVFormatContext *avf,
char *path, const char *proto)
{
if (hls->method || (proto && !av_strcasecmp(proto, "http"))) {
AVDictionary *opt = NULL;
int ret;
set_http_options(avf, &opt, hls);
av_dict_set(&opt, "method", "DELETE", 0);
ret = hlsenc_io_open(avf, &hls->http_delete, path, &opt);
av_dict_free(&opt);
if (ret < 0)
return hls->ignore_io_errors ? 1 : ret;
//Nothing to write
hlsenc_io_close(avf, &hls->http_delete, path);
} else if (unlink(path) < 0) {
av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
path, strerror(errno));
}
return 0;
}
static int hls_delete_old_segments(AVFormatContext *s, HLSContext *hls,
VariantStream *vs)
{
HLSSegment *segment, *previous_segment = NULL;
float playlist_duration = 0.0f;
int ret = 0;
int segment_cnt = 0;
AVBPrint path;
const char *dirname = NULL;
char *dirname_r = NULL;
char *dirname_repl = NULL;
const char *vtt_dirname = NULL;
char *vtt_dirname_r = NULL;
const char *proto = NULL;
av_bprint_init(&path, 0, AV_BPRINT_SIZE_UNLIMITED);
segment = vs->segments;
while (segment) {
playlist_duration += segment->duration;
segment = segment->next;
}
segment = vs->old_segments;
segment_cnt = 0;
while (segment) {
playlist_duration -= segment->duration;
previous_segment = segment;
segment = previous_segment->next;
segment_cnt++;
if (playlist_duration <= -previous_segment->duration) {
previous_segment->next = NULL;
break;
}
if (segment_cnt >= hls->hls_delete_threshold) {
previous_segment->next = NULL;
break;
}
}
if (segment && !hls->use_localtime_mkdir) {
dirname_r = hls->segment_filename ? av_strdup(hls->segment_filename): av_strdup(vs->avf->url);
dirname = av_dirname(dirname_r);
}
/* if %v is present in the file's directory
* all segment belongs to the same variant, so do it only once before the loop*/
if (dirname && av_stristr(dirname, "%v")) {
if (!vs->varname) {
if (replace_int_data_in_filename(&dirname_repl, dirname, 'v', segment->var_stream_idx) < 1) {
ret = AVERROR(EINVAL);
goto fail;
}
} else {
if (replace_str_data_in_filename(&dirname_repl, dirname, 'v', vs->varname) < 1) {
ret = AVERROR(EINVAL);
goto fail;
}
}
dirname = dirname_repl;
}
while (segment) {
av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
segment->filename);
if (!hls->use_localtime_mkdir) // segment->filename contains basename only
av_bprintf(&path, "%s/", dirname);
av_bprintf(&path, "%s", segment->filename);
if (!av_bprint_is_complete(&path)) {
ret = AVERROR(ENOMEM);
goto fail;
}
proto = avio_find_protocol_name(s->url);
if (ret = hls_delete_file(hls, s, path.str, proto))
goto fail;
if ((segment->sub_filename[0] != '\0')) {
vtt_dirname_r = av_strdup(vs->vtt_avf->url);
vtt_dirname = av_dirname(vtt_dirname_r);
av_bprint_clear(&path);
av_bprintf(&path, "%s/%s", vtt_dirname, segment->sub_filename);
av_freep(&vtt_dirname_r);
if (!av_bprint_is_complete(&path)) {
ret = AVERROR(ENOMEM);
goto fail;
}
if (ret = hls_delete_file(hls, s, path.str, proto))
goto fail;
}
av_bprint_clear(&path);
previous_segment = segment;
segment = previous_segment->next;
av_freep(&previous_segment);
}
fail:
av_bprint_finalize(&path, NULL);
av_freep(&dirname_r);
av_freep(&dirname_repl);
return ret;
}
static int do_encrypt(AVFormatContext *s, VariantStream *vs)
{
HLSContext *hls = s->priv_data;
int ret;
int len;
AVIOContext *pb;
uint8_t key[KEYSIZE];
char * key_basename_source = (hls->master_m3u8_url) ? hls->master_m3u8_url : s->url;
len = strlen(key_basename_source) + 4 + 1;
hls->key_basename = av_mallocz(len);
if (!hls->key_basename)
return AVERROR(ENOMEM);
av_strlcpy(hls->key_basename, key_basename_source, len);
av_strlcat(hls->key_basename, ".key", len);
if (hls->key_url) {
av_strlcpy(hls->key_file, hls->key_url, sizeof(hls->key_file));
av_strlcpy(hls->key_uri, hls->key_url, sizeof(hls->key_uri));
} else {
av_strlcpy(hls->key_file, hls->key_basename, sizeof(hls->key_file));
av_strlcpy(hls->key_uri, hls->key_basename, sizeof(hls->key_uri));
}
if (!*hls->iv_string) {
uint8_t iv[16] = { 0 };
char buf[33];
if (!hls->iv) {
AV_WB64(iv + 8, vs->sequence);
} else {
memcpy(iv, hls->iv, sizeof(iv));
}
ff_data_to_hex(buf, iv, sizeof(iv), 0);
memcpy(hls->iv_string, buf, sizeof(hls->iv_string));
}
if (!*hls->key_uri) {
av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
return AVERROR(EINVAL);
}
if (!*hls->key_file) {
av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
return AVERROR(EINVAL);
}
if (!*hls->key_string) {
AVDictionary *options = NULL;
if (!hls->key) {
if ((ret = av_random_bytes(key, sizeof(key))) < 0) {
av_log(s, AV_LOG_ERROR, "Cannot generate a strong random key\n");
return ret;
}
} else {
memcpy(key, hls->key, sizeof(key));
}
ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
set_http_options(s, &options, hls);
ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_WRITE, &options);
av_dict_free(&options);
if (ret < 0)
return ret;
avio_seek(pb, 0, SEEK_CUR);
avio_write(pb, key, KEYSIZE);
avio_close(pb);
}
return 0;
}
static int hls_encryption_start(AVFormatContext *s, VariantStream *vs)
{
HLSContext *hls = s->priv_data;
int ret;
AVIOContext *pb;
uint8_t key[KEYSIZE];
AVDictionary *options = NULL;
set_http_options(s, &options, hls);
ret = s->io_open(s, &pb, hls->key_info_file, AVIO_FLAG_READ, &options);
av_dict_free(&options);
if (ret < 0) {
av_log(hls, AV_LOG_ERROR,
"error opening key info file %s\n", hls->key_info_file);
return ret;
}
ff_get_line(pb, vs->key_uri, sizeof(vs->key_uri));
vs->key_uri[strcspn(vs->key_uri, "\r\n")] = '\0';
ff_get_line(pb, vs->key_file, sizeof(vs->key_file));
vs->key_file[strcspn(vs->key_file, "\r\n")] = '\0';
ff_get_line(pb, vs->iv_string, sizeof(vs->iv_string));
vs->iv_string[strcspn(vs->iv_string, "\r\n")] = '\0';
ff_format_io_close(s, &pb);
if (!*vs->key_uri) {
av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
return AVERROR(EINVAL);
}
if (!*vs->key_file) {
av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
return AVERROR(EINVAL);
}
set_http_options(s, &options, hls);
ret = s->io_open(s, &pb, vs->key_file, AVIO_FLAG_READ, &options);
av_dict_free(&options);
if (ret < 0) {
av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", vs->key_file);
return ret;
}
ret = avio_read(pb, key, sizeof(key));
ff_format_io_close(s, &pb);
if (ret != sizeof(key)) {
av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", vs->key_file);
if (ret >= 0 || ret == AVERROR_EOF)
ret = AVERROR(EINVAL);
return ret;
}
ff_data_to_hex(vs->key_string, key, sizeof(key), 0);
return 0;
}
static int hls_mux_init(AVFormatContext *s, VariantStream *vs)
{
AVDictionary *options = NULL;
HLSContext *hls = s->priv_data;
AVFormatContext *oc;
AVFormatContext *vtt_oc = NULL;
int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
int remaining_options;
int i, ret;
ret = avformat_alloc_output_context2(&vs->avf, vs->oformat, NULL, NULL);
if (ret < 0)
return ret;
oc = vs->avf;
oc->url = av_strdup("");
if (!oc->url)
return AVERROR(ENOMEM);
oc->interrupt_callback = s->interrupt_callback;
oc->max_delay = s->max_delay;
oc->opaque = s->opaque;
oc->io_open = s->io_open;
oc->io_close2 = s->io_close2;
oc->strict_std_compliance = s->strict_std_compliance;
av_dict_copy(&oc->metadata, s->metadata, 0);
if (vs->vtt_oformat) {
ret = avformat_alloc_output_context2(&vs->vtt_avf, vs->vtt_oformat, NULL, NULL);
if (ret < 0)
return ret;
vtt_oc = vs->vtt_avf;
av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
}
for (i = 0; i < vs->nb_streams; i++) {
AVStream *st;
AVFormatContext *loc;
if (vs->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
loc = vtt_oc;
else
loc = oc;
if (!(st = avformat_new_stream(loc, NULL)))
return AVERROR(ENOMEM);
avcodec_parameters_copy(st->codecpar, vs->streams[i]->codecpar);
if (!oc->oformat->codec_tag ||
av_codec_get_id (oc->oformat->codec_tag, vs->streams[i]->codecpar->codec_tag) == st->codecpar->codec_id ||
av_codec_get_tag(oc->oformat->codec_tag, vs->streams[i]->codecpar->codec_id) <= 0) {
st->codecpar->codec_tag = vs->streams[i]->codecpar->codec_tag;
} else {
st->codecpar->codec_tag = 0;
}
st->sample_aspect_ratio = vs->streams[i]->sample_aspect_ratio;
st->time_base = vs->streams[i]->time_base;
av_dict_copy(&st->metadata, vs->streams[i]->metadata, 0);
st->id = vs->streams[i]->id;
}
vs->start_pos = 0;
vs->new_start = 1;
if (hls->segment_type == SEGMENT_TYPE_FMP4 && hls->max_seg_size > 0) {
if (hls->http_persistent > 0) {
//TODO: Support fragment fmp4 for http persistent in HLS muxer.
av_log(s, AV_LOG_WARNING, "http persistent mode is currently unsupported for fragment mp4 in the HLS muxer.\n");
}
if (hls->max_seg_size > 0) {
av_log(s, AV_LOG_WARNING, "Multi-file byterange mode is currently unsupported in the HLS muxer.\n");
return AVERROR_PATCHWELCOME;
}
}
if ((ret = avio_open_dyn_buf(&oc->pb)) < 0)
return ret;
if (hls->segment_type == SEGMENT_TYPE_FMP4) {
set_http_options(s, &options, hls);
if (byterange_mode) {
ret = hlsenc_io_open(s, &vs->out, vs->basename, &options);
} else {
ret = hlsenc_io_open(s, &vs->out, vs->base_output_dirname, &options);
}
av_dict_free(&options);
}
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", vs->fmp4_init_filename);
return ret;
}
av_dict_copy(&options, hls->format_options, 0);
if (hls->segment_type == SEGMENT_TYPE_FMP4) {
av_dict_set(&options, "fflags", "-autobsf", 0);
av_dict_set(&options, "movflags", "+frag_custom+dash+delay_moov", AV_DICT_APPEND);
} else {
/* We only require one PAT/PMT per segment. */
char period[21];
snprintf(period, sizeof(period), "%d", (INT_MAX / 2) - 1);
av_dict_set(&options, "sdt_period", period, AV_DICT_DONT_OVERWRITE);
av_dict_set(&options, "pat_period", period, AV_DICT_DONT_OVERWRITE);
}
ret = avformat_init_output(oc, &options);
remaining_options = av_dict_count(options);
av_dict_free(&options);
if (ret < 0)
return ret;
if (remaining_options) {
av_log(s, AV_LOG_ERROR, "Some of the provided format options are not recognized\n");
return AVERROR(EINVAL);
}
avio_flush(oc->pb);
return 0;
}
static HLSSegment *find_segment_by_filename(HLSSegment *segment, const char *filename)
{
while (segment) {
if (!av_strcasecmp(segment->filename,filename))
return segment;
segment = segment->next;
}
return (HLSSegment *) NULL;
}
static int sls_flags_filename_process(struct AVFormatContext *s, HLSContext *hls,
VariantStream *vs, HLSSegment *en,
double duration, int64_t pos, int64_t size)
{
if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
strlen(vs->current_segment_final_filename_fmt)) {
char * new_url = av_strdup(vs->current_segment_final_filename_fmt);
if (!new_url) {
return AVERROR(ENOMEM);
}
ff_format_set_url(vs->avf, new_url);
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
char *filename = NULL;
if (replace_int_data_in_filename(&filename, vs->avf->url, 's', pos + size) < 1) {
av_log(hls, AV_LOG_ERROR,
"Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_size flag\n",
vs->avf->url);
av_freep(&filename);
return AVERROR(EINVAL);
}
ff_format_set_url(vs->avf, filename);
}
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
char *filename = NULL;
if (replace_int_data_in_filename(&filename, vs->avf->url,
't', (int64_t)round(duration * HLS_MICROSECOND_UNIT)) < 1) {
av_log(hls, AV_LOG_ERROR,
"Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_duration flag\n",
vs->avf->url);
av_freep(&filename);
return AVERROR(EINVAL);
}
ff_format_set_url(vs->avf, filename);
}
}