[FFmpeg-devel] [PATCH 2/3] libavformat/hls: add support for decryption of HLS streams in MPEG-TS format protected using SAMPLE-AES encryption
Nachiket Tarate
nachiket.programmer at gmail.com
Mon Mar 8 09:15:13 EET 2021
On Wed, Mar 3, 2021 at 11:15 AM Nachiket Tarate
<nachiket.programmer at gmail.com> wrote:
>
> On Mon, Mar 1, 2021 at 1:05 PM Steven Liu <lq at chinaffmpeg.org> wrote:
> >
> >
> >
> > > 2021年3月1日 下午3:22，Nachiket Tarate <nachiket.programmer at gmail.com> 写道：
> > >
> > > On Mon, Mar 1, 2021 at 11:30 AM Steven Liu <lq at chinaffmpeg.org> wrote:
> > >>
> > >>
> > >>
> > >>> 2021年3月1日 下午12:55，Nachiket Tarate <nachiket.programmer at gmail.com> 写道：
> > >>>
> > >>> This is an updated version of the patch in which I have added the check. If
> > >>> the segments are in Fragmented MP4 format, HLS demuxer quits by giving an
> > >>> error message:
> > >>>
> > >>> "SAMPLE-AES encryption is not supported for fragmented MP4 format yet”
> > >> I don’t think is a good resolution for SAMPLE-AES encryption and decryption.
> > >> You should support that if you want support SAMPLE-AES in hls,
> > >> because SAMPLE-AES not only support in MPEG-TS, but also support fragment mp4.
> > >> Whatever, if you only support mpegts en[de]cryption, it should be a half part patch.
> > >
> > > Two completely different technologies/specifications have been used
> > > for SAMPLE-AES encryption of HLS streams in MPEG-TS and fragmented MP4
> > > formats.
> > >
> > > Fragmented MP4 media segments are encrypted using the 'cbcs' scheme of
> > > Common Encryption [CENC]:
> > >
> > > https://www.iso.org/standard/68042.html
> > >
> > > Encryption of other media segment formats such as MPEG-TS or external
> > > audio tracks containing H.264, AAC, AC-3 and Enhanced AC-3 media
> > > streams is described in the Apple's HTTP Live Streaming (HLS) Sample
> > > Encryption specifications:
> > >
> > > https://developer.apple.com/library/ios/documentation/AudioVideo/Conceptual/HLS_Sample_Encryption
> > >
> > > This patch implements the later specifications and enables decryption
> > > of media segments in MPEG-TS, AAC, AC-3 and Enhanced AC-3 formats. So
> > > I think we should merge this patch right now.
> >
> > I think sample ads should support not only mpegts, but also support fmp4 too.
> > Reference rfc8216 context:
> > An encryption method of SAMPLE-AES means that the Media Segments
> > contain media samples, such as audio or video, that are encrypted
> > using the Advanced Encryption Standard [AES_128]. How these media
> > streams are encrypted and encapsulated in a segment depends on the
> > media encoding and the media format of the segment. fMP4 Media
> > Segments are encrypted using the 'cbcs' scheme of Common
> > Encryption [COMMON_ENC]. Encryption of other Media Segment
> > formats containing H.264 [H_264], AAC [ISO_14496], AC-3 [AC_3],
> > and Enhanced AC-3 [AC_3] media streams is described in the HTTP
> > Live Streaming (HLS) Sample Encryption specification [SampleEnc].
> > The IV attribute MAY be present; see Section 5.2.
> >
> > And I saw the m3u8 context, the METHOD is SAMPLE-AES.
> >
> > (base) liuqi05:ufbuild liuqi$ head -n10 prog_index.m3u8
> > #EXTM3U
> > #EXT-X-TARGETDURATION:10
> > #EXT-X-VERSION:7
> > #EXT-X-MEDIA-SEQUENCE:0
> > #EXT-X-PLAYLIST-TYPE:VOD
> > #EXT-X-INDEPENDENT-SEGMENTS
> >
> > Focus on this line.
> > #EXT-X-KEY:METHOD=SAMPLE-AES,URI="http://127.0.0.1/keyOnly.bin",IV=0xcece273e2737a58ca785e257eb080482
> >
> >
> > #EXT-X-MAP:URI="fileSequence0.mp4"
> > #EXTINF:8.31667,
> > #EXT-X-BITRATE:7064
> >
> >
> > You can point me the part if I misunderstood SAMPLE-AES.
>
> Your understanding of SAMPLE-AES is absolutely correct.
>
> I am insisting that let us add support for it in 2 phases as
> completely 2 different specifications have been used.
>
> Phase 1 : Media segments in MPEG-TS, AAC, AC-3 and Enhanced AC-3
> formats (Apple's specifications)
>
> Phase 2 : Media segments in fragmented MP4 format (CENC specifications)
>
> Kindly let me know your opinion.
Hello Steven,
I am looking forward to hearing from you.
Best Regards,
Nachiket
>
> > >
> > > In future, we will add support for CENC or see how can we use existing
> > > things from MOV demuxer.
> > >
> > > Best Regards,
> > > Nachiket Tarate
> > >
> > >>>
> > >>> Best Regards,
> > >>> Nachiket Tarate
> > >>>
> > >>> On Mon, Mar 1, 2021 at 10:13 AM Steven Liu <lq at chinaffmpeg.org> wrote:
> > >>>
> > >>>>
> > >>>>
> > >>>>> 2021年3月1日 下午12:35，Nachiket Tarate <nachiket.programmer at gmail.com> 写道：
> > >>>>>
> > >>>>> @Steven Liu <lq at chinaffmpeg.org>
> > >>>>>
> > >>>>> Can we merge this patch ?
> > >>>> I’m waiting update patch for fragment mp4 encryption.
> > >>>> After new version of the patchset I will test and review.
> > >>>>>
> > >>>>> Best Regards,
> > >>>>> Nachiket Tarate
> > >>>>>
> > >>>>> On Wed, Feb 24, 2021 at 4:44 PM Nachiket Tarate <
> > >>>>> nachiket.programmer at gmail.com> wrote:
> > >>>>>
> > >>>>>> Apple HTTP Live Streaming Sample Encryption:
> > >>>>>>
> > >>>>>>
> > >>>>>>
> > >>>> https://developer.apple.com/library/ios/documentation/AudioVideo/Conceptual/HLS_Sample_Encryption
> > >>>>>>
> > >>>>>> Signed-off-by: Nachiket Tarate <nachiket.programmer at gmail.com>
> > >>>>>> ---
> > >>>>>> libavformat/Makefile | 2 +-
> > >>>>>> libavformat/hls.c | 105 ++++++++--
> > >>>>>> libavformat/hls_sample_aes.c | 391 +++++++++++++++++++++++++++++++++++
> > >>>>>> libavformat/hls_sample_aes.h | 66 ++++++
> > >>>>>> libavformat/mpegts.c | 12 ++
> > >>>>>> 5 files changed, 562 insertions(+), 14 deletions(-)
> > >>>>>> create mode 100644 libavformat/hls_sample_aes.c
> > >>>>>> create mode 100644 libavformat/hls_sample_aes.h
> > >>>>>>
> > >>>>>> diff --git a/libavformat/Makefile b/libavformat/Makefile
> > >>>>>> index fcb39ce133..62627d50a6 100644
> > >>>>>> --- a/libavformat/Makefile
> > >>>>>> +++ b/libavformat/Makefile
> > >>>>>> @@ -236,7 +236,7 @@ OBJS-$(CONFIG_HCOM_DEMUXER) += hcom.o
> > >>>>>> pcm.o
> > >>>>>> OBJS-$(CONFIG_HDS_MUXER) += hdsenc.o
> > >>>>>> OBJS-$(CONFIG_HEVC_DEMUXER) += hevcdec.o rawdec.o
> > >>>>>> OBJS-$(CONFIG_HEVC_MUXER) += rawenc.o
> > >>>>>> -OBJS-$(CONFIG_HLS_DEMUXER) += hls.o
> > >>>>>> +OBJS-$(CONFIG_HLS_DEMUXER) += hls.o hls_sample_aes.o
> > >>>>>> OBJS-$(CONFIG_HLS_MUXER) += hlsenc.o hlsplaylist.o avc.o
> > >>>>>> OBJS-$(CONFIG_HNM_DEMUXER) += hnm.o
> > >>>>>> OBJS-$(CONFIG_ICO_DEMUXER) += icodec.o
> > >>>>>> diff --git a/libavformat/hls.c b/libavformat/hls.c
> > >>>>>> index af2468ad9b..3cb3853c79 100644
> > >>>>>> --- a/libavformat/hls.c
> > >>>>>> +++ b/libavformat/hls.c
> > >>>>>> @@ -2,6 +2,7 @@
> > >>>>>> * Apple HTTP Live Streaming demuxer
> > >>>>>> * Copyright (c) 2010 Martin Storsjo
> > >>>>>> * Copyright (c) 2013 Anssi Hannula
> > >>>>>> + * Copyright (c) 2021 Nachiket Tarate
> > >>>>>> *
> > >>>>>> * This file is part of FFmpeg.
> > >>>>>> *
> > >>>>>> @@ -39,6 +40,8 @@
> > >>>>>> #include "avio_internal.h"
> > >>>>>> #include "id3v2.h"
> > >>>>>>
> > >>>>>> +#include "hls_sample_aes.h"
> > >>>>>> +
> > >>>>>> #define INITIAL_BUFFER_SIZE 32768
> > >>>>>>
> > >>>>>> #define MAX_FIELD_LEN 64
> > >>>>>> @@ -145,6 +148,10 @@ struct playlist {
> > >>>>>> int id3_changed; /* ID3 tag data has changed at some point */
> > >>>>>> ID3v2ExtraMeta *id3_deferred_extra; /* stored here until subdemuxer
> > >>>>>> is opened */
> > >>>>>>
> > >>>>>> + /* Used in case of SAMPLE-AES encryption method */
> > >>>>>> + HLSAudioSetupInfo audio_setup_info;
> > >>>>>> + HLSCryptoContext crypto_ctx;
> > >>>>>> +
> > >>>>>> int64_t seek_timestamp;
> > >>>>>> int seek_flags;
> > >>>>>> int seek_stream_index; /* into subdemuxer stream array */
> > >>>>>> @@ -266,6 +273,8 @@ static void free_playlist_list(HLSContext *c)
> > >>>>>> pls->ctx->pb = NULL;
> > >>>>>> avformat_close_input(&pls->ctx);
> > >>>>>> }
> > >>>>>> + if (pls->crypto_ctx.aes_ctx)
> > >>>>>> + av_free(pls->crypto_ctx.aes_ctx);
> > >>>>>> av_free(pls);
> > >>>>>> }
> > >>>>>> av_freep(&c->playlists);
> > >>>>>> @@ -994,7 +1003,10 @@ fail:
> > >>>>>>
> > >>>>>> static struct segment *current_segment(struct playlist *pls)
> > >>>>>> {
> > >>>>>> - return pls->segments[pls->cur_seq_no - pls->start_seq_no];
> > >>>>>> + int64_t n = pls->cur_seq_no - pls->start_seq_no;
> > >>>>>> + if (n >= pls->n_segments)
> > >>>>>> + return NULL;
> > >>>>>> + return pls->segments[n];
> > >>>>>> }
> > >>>>>>
> > >>>>>> static struct segment *next_segment(struct playlist *pls)
> > >>>>>> @@ -1023,10 +1035,11 @@ static int read_from_url(struct playlist *pls,
> > >>>>>> struct segment *seg,
> > >>>>>>
> > >>>>>> /* Parse the raw ID3 data and pass contents to caller */
> > >>>>>> static void parse_id3(AVFormatContext *s, AVIOContext *pb,
> > >>>>>> - AVDictionary **metadata, int64_t *dts,
> > >>>>>> + AVDictionary **metadata, int64_t *dts,
> > >>>>>> HLSAudioSetupInfo *audio_setup_info,
> > >>>>>> ID3v2ExtraMetaAPIC **apic, ID3v2ExtraMeta
> > >>>>>> **extra_meta)
> > >>>>>> {
> > >>>>>> static const char id3_priv_owner_ts[] =
> > >>>>>> "com.apple.streaming.transportStreamTimestamp";
> > >>>>>> + static const char id3_priv_owner_audio_setup[] =
> > >>>>>> "com.apple.streaming.audioDescription";
> > >>>>>> ID3v2ExtraMeta *meta;
> > >>>>>>
> > >>>>>> ff_id3v2_read_dict(pb, metadata, ID3v2_DEFAULT_MAGIC, extra_meta);
> > >>>>>> @@ -1041,6 +1054,8 @@ static void parse_id3(AVFormatContext *s,
> > >>>>>> AVIOContext *pb,
> > >>>>>> *dts = ts;
> > >>>>>> else
> > >>>>>> av_log(s, AV_LOG_ERROR, "Invalid HLS ID3 audio
> > >>>>>> timestamp %"PRId64"\n", ts);
> > >>>>>> + } else if (priv->datasize >= 8 && !strcmp(priv->owner,
> > >>>>>> id3_priv_owner_audio_setup)) {
> > >>>>>> + ff_hls_read_audio_setup_info(audio_setup_info,
> > >>>>>> priv->data, priv->datasize);
> > >>>>>> }
> > >>>>>> } else if (!strcmp(meta->tag, "APIC") && apic)
> > >>>>>> *apic = &meta->data.apic;
> > >>>>>> @@ -1084,7 +1099,7 @@ static void handle_id3(AVIOContext *pb, struct
> > >>>>>> playlist *pls)
> > >>>>>> ID3v2ExtraMeta *extra_meta = NULL;
> > >>>>>> int64_t timestamp = AV_NOPTS_VALUE;
> > >>>>>>
> > >>>>>> - parse_id3(pls->ctx, pb, &metadata, ×tamp, &apic, &extra_meta);
> > >>>>>> + parse_id3(pls->ctx, pb, &metadata, ×tamp,
> > >>>>>> &pls->audio_setup_info, &apic, &extra_meta);
> > >>>>>>
> > >>>>>> if (timestamp != AV_NOPTS_VALUE) {
> > >>>>>> pls->id3_mpegts_timestamp = timestamp;
> > >>>>>> @@ -1238,10 +1253,7 @@ static int open_input(HLSContext *c, struct
> > >>>>>> playlist *pls, struct segment *seg,
> > >>>>>> 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) {
> > >>>>>> - ret = open_url(pls->parent, in, seg->url, &c->avio_opts, opts,
> > >>>>>> &is_http);
> > >>>>>> - } else if (seg->key_type == KEY_AES_128) {
> > >>>>>> - char iv[33], key[33], url[MAX_URL_SIZE];
> > >>>>>> + if (seg->key_type == KEY_AES_128 || seg->key_type ==
> > >>>> KEY_SAMPLE_AES) {
> > >>>>>> if (strcmp(seg->key, pls->key_url)) {
> > >>>>>> AVIOContext *pb = NULL;
> > >>>>>> if (open_url(pls->parent, &pb, seg->key, &c->avio_opts,
> > >>>> opts,
> > >>>>>> NULL) == 0) {
> > >>>>>> @@ -1257,6 +1269,10 @@ static int open_input(HLSContext *c, struct
> > >>>>>> playlist *pls, struct segment *seg,
> > >>>>>> }
> > >>>>>> av_strlcpy(pls->key_url, seg->key, sizeof(pls->key_url));
> > >>>>>> }
> > >>>>>> + }
> > >>>>>> +
> > >>>>>> + if (seg->key_type == KEY_AES_128) {
> > >>>>>> + char iv[33], key[33], url[MAX_URL_SIZE];
> > >>>>>> ff_data_to_hex(iv, seg->iv, sizeof(seg->iv), 0);
> > >>>>>> ff_data_to_hex(key, pls->key, sizeof(pls->key), 0);
> > >>>>>> iv[32] = key[32] = '\0';
> > >>>>>> @@ -1273,13 +1289,9 @@ static int open_input(HLSContext *c, struct
> > >>>>>> playlist *pls, struct segment *seg,
> > >>>>>> 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 = open_url(pls->parent, in, seg->url, &c->avio_opts, opts,
> > >>>>>> &is_http);
> > >>>>>> }
> > >>>>>> - 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
> > >>>>>> @@ -1948,6 +1960,7 @@ static int hls_read_header(AVFormatContext *s)
> > >>>>>> struct playlist *pls = c->playlists[i];
> > >>>>>> char *url;
> > >>>>>> ff_const59 AVInputFormat *in_fmt = NULL;
> > >>>>>> + struct segment *seg = NULL;
> > >>>>>>
> > >>>>>> if (!(pls->ctx = avformat_alloc_context())) {
> > >>>>>> ret = AVERROR(ENOMEM);
> > >>>>>> @@ -1980,8 +1993,41 @@ static int hls_read_header(AVFormatContext *s)
> > >>>>>> pls->ctx = NULL;
> > >>>>>> goto fail;
> > >>>>>> }
> > >>>>>> +
> > >>>>>> ffio_init_context(&pls->pb, pls->read_buffer,
> > >>>>>> INITIAL_BUFFER_SIZE, 0, pls,
> > >>>>>> read_data, NULL, NULL);
> > >>>>>> +
> > >>>>>> + /*
> > >>>>>> + * If encryption scheme is SAMPLE-AES, try to read ID3 tags of
> > >>>>>> + * external audio track that contains audio setup information
> > >>>>>> + */
> > >>>>>> + seg = current_segment(pls);
> > >>>>>> + if (seg && seg->key_type == KEY_SAMPLE_AES &&
> > >>>> pls->n_renditions >
> > >>>>>> 0 &&
> > >>>>>> + pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO) {
> > >>>>>> + uint8_t buf[HLS_MAX_ID3_TAGS_DATA_LEN];
> > >>>>>> + if ((ret = avio_read(&pls->pb, buf,
> > >>>>>> HLS_MAX_ID3_TAGS_DATA_LEN)) < 0) {
> > >>>>>> + /* Fail if error was not end of file */
> > >>>>>> + if (ret != AVERROR_EOF) {
> > >>>>>> + avformat_free_context(pls->ctx);
> > >>>>>> + pls->ctx = NULL;
> > >>>>>> + goto fail;
> > >>>>>> + }
> > >>>>>> + }
> > >>>>>> + ret = 0;
> > >>>>>> + }
> > >>>>>> +
> > >>>>>> + /*
> > >>>>>> + * If encryption scheme is SAMPLE-AES and audio setup
> > >>>> information
> > >>>>>> is present in external audio track,
> > >>>>>> + * use that information to find the media format, otherwise
> > >>>> probe
> > >>>>>> input data
> > >>>>>> + */
> > >>>>>> + if (seg && seg->key_type == KEY_SAMPLE_AES &&
> > >>>>>> pls->is_id3_timestamped &&
> > >>>>>> + pls->audio_setup_info.codec_id != AV_CODEC_ID_NONE) {
> > >>>>>> + void *iter = NULL;
> > >>>>>> + while ((in_fmt = (ff_const59 AVInputFormat
> > >>>>>> *)av_demuxer_iterate(&iter)))
> > >>>>>> + if (in_fmt->raw_codec_id ==
> > >>>>>> pls->audio_setup_info.codec_id) {
> > >>>>>> + break;
> > >>>>>> + }
> > >>>>>> + } else {
> > >>>>>> pls->ctx->probesize = s->probesize > 0 ? s->probesize : 1024 *
> > >>>> 4;
> > >>>>>> pls->ctx->max_analyze_duration = s->max_analyze_duration > 0 ?
> > >>>>>> s->max_analyze_duration : 4 * AV_TIME_BASE;
> > >>>>>> pls->ctx->interrupt_callback = s->interrupt_callback;
> > >>>>>> @@ -1999,6 +2045,25 @@ static int hls_read_header(AVFormatContext *s)
> > >>>>>> goto fail;
> > >>>>>> }
> > >>>>>> av_free(url);
> > >>>>>> + }
> > >>>>>> +
> > >>>>>> + if (seg && seg->key_type == KEY_SAMPLE_AES) {
> > >>>>>> + if (!pls->is_id3_timestamped && pls->n_renditions > 0 &&
> > >>>>>> pls->renditions[0]->type != AVMEDIA_TYPE_AUDIO &&
> > >>>>>> + strcmp(in_fmt->name, "mpegts")) {
> > >>>>>> + av_log(s, AV_LOG_ERROR, "SAMPLE-AES encryption is not
> > >>>>>> supported for fragmented MP4 format yet\n");
> > >>>>>> + ret = AVERROR_PATCHWELCOME;
> > >>>>>> + } else {
> > >>>>>> + pls->crypto_ctx.aes_ctx = av_aes_alloc();
> > >>>>>> + if (!pls->crypto_ctx.aes_ctx)
> > >>>>>> + ret = AVERROR(ENOMEM);
> > >>>>>> + }
> > >>>>>> + if (ret != 0) {
> > >>>>>> + avformat_free_context(pls->ctx);
> > >>>>>> + pls->ctx = NULL;
> > >>>>>> + goto fail;
> > >>>>>> + }
> > >>>>>> + }
> > >>>>>> +
> > >>>>>> pls->ctx->pb = &pls->pb;
> > >>>>>> pls->ctx->io_open = nested_io_open;
> > >>>>>> pls->ctx->flags |= s->flags & ~AVFMT_FLAG_CUSTOM_IO;
> > >>>>>> @@ -2027,7 +2092,12 @@ static int hls_read_header(AVFormatContext *s)
> > >>>>>> * on us if they want to.
> > >>>>>> */
> > >>>>>> if (pls->is_id3_timestamped || (pls->n_renditions > 0 &&
> > >>>>>> pls->renditions[0]->type == AVMEDIA_TYPE_AUDIO)) {
> > >>>>>> + if (seg && seg->key_type == KEY_SAMPLE_AES &&
> > >>>>>> pls->audio_setup_info.setup_data_length > 0 &&
> > >>>>>> + pls->ctx->nb_streams == 1)
> > >>>>>> + ret =
> > >>>> ff_hls_parse_audio_setup_info(pls->ctx->streams[0],
> > >>>>>> &pls->audio_setup_info);
> > >>>>>> + else
> > >>>>>> ret = avformat_find_stream_info(pls->ctx, NULL);
> > >>>>>> +
> > >>>>>> if (ret < 0)
> > >>>>>> goto fail;
> > >>>>>> }
> > >>>>>> @@ -2157,6 +2227,7 @@ static int hls_read_packet(AVFormatContext *s,
> > >>>>>> AVPacket *pkt)
> > >>>>>> while (1) {
> > >>>>>> int64_t ts_diff;
> > >>>>>> AVRational tb;
> > >>>>>> + struct segment *seg = NULL;
> > >>>>>> ret = av_read_frame(pls->ctx, &pls->pkt);
> > >>>>>> if (ret < 0) {
> > >>>>>> if (!avio_feof(&pls->pb) && ret != AVERROR_EOF)
> > >>>>>> @@ -2175,6 +2246,14 @@ static int hls_read_packet(AVFormatContext *s,
> > >>>>>> AVPacket *pkt)
> > >>>>>> get_timebase(pls), AV_TIME_BASE_Q);
> > >>>>>> }
> > >>>>>>
> > >>>>>> + seg = current_segment(pls);
> > >>>>>> + if (seg && seg->key_type == KEY_SAMPLE_AES) {
> > >>>>>> + enum AVCodecID codec_id =
> > >>>>>> pls->ctx->streams[pls->pkt.stream_index]->codecpar->codec_id;
> > >>>>>> + memcpy(pls->crypto_ctx.iv, seg->iv,
> > >>>> sizeof(seg->iv));
> > >>>>>> + memcpy(pls->crypto_ctx.key, pls->key,
> > >>>>>> sizeof(pls->key));
> > >>>>>> + ff_hls_decrypt_frame(codec_id, &pls->crypto_ctx,
> > >>>>>> &pls->pkt);
> > >>>>>> + }
> > >>>>>> +
> > >>>>>> if (pls->seek_timestamp == AV_NOPTS_VALUE)
> > >>>>>> break;
> > >>>>>>
> > >>>>>> diff --git a/libavformat/hls_sample_aes.c b/libavformat/hls_sample_aes.c
> > >>>>>> new file mode 100644
> > >>>>>> index 0000000000..0407a15b0f
> > >>>>>> --- /dev/null
> > >>>>>> +++ b/libavformat/hls_sample_aes.c
> > >>>>>> @@ -0,0 +1,391 @@
> > >>>>>> +/*
> > >>>>>> + * Apple HTTP Live Streaming Sample Encryption/Decryption
> > >>>>>> + *
> > >>>>>> + * Copyright (c) 2021 Nachiket Tarate
> > >>>>>> + *
> > >>>>>> + * This file is part of FFmpeg.
> > >>>>>> + *
> > >>>>>> + * FFmpeg is free software; you can redistribute it and/or
> > >>>>>> + * modify it under the terms of the GNU Lesser General Public
> > >>>>>> + * License as published by the Free Software Foundation; either
> > >>>>>> + * version 2.1 of the License, or (at your option) any later version.
> > >>>>>> + *
> > >>>>>> + * FFmpeg is distributed in the hope that it will be useful,
> > >>>>>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> > >>>>>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> > >>>>>> + * Lesser General Public License for more details.
> > >>>>>> + *
> > >>>>>> + * You should have received a copy of the GNU Lesser General Public
> > >>>>>> + * License along with FFmpeg; if not, write to the Free Software
> > >>>>>> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> > >>>>>> 02110-1301 USA
> > >>>>>> + */
> > >>>>>> +
> > >>>>>> +/**
> > >>>>>> + * @file
> > >>>>>> + * Apple HTTP Live Streaming Sample Encryption
> > >>>>>> + *
> > >>>>>>
> > >>>> https://developer.apple.com/library/ios/documentation/AudioVideo/Conceptual/HLS_Sample_Encryption
> > >>>>>> + */
> > >>>>>> +
> > >>>>>> +#include "hls_sample_aes.h"
> > >>>>>> +
> > >>>>>> +#include "libavcodec/adts_header.h"
> > >>>>>> +#include "libavcodec/adts_parser.h"
> > >>>>>> +#include "libavcodec/ac3_parser_internal.h"
> > >>>>>> +
> > >>>>>> +
> > >>>>>> +typedef struct NALUnit {
> > >>>>>> + uint8_t *data;
> > >>>>>> + int type;
> > >>>>>> + int length;
> > >>>>>> + int start_code_length;
> > >>>>>> +} NALUnit;
> > >>>>>> +
> > >>>>>> +typedef struct AudioFrame {
> > >>>>>> + uint8_t *data;
> > >>>>>> + int length;
> > >>>>>> + int header_length;
> > >>>>>> +} AudioFrame;
> > >>>>>> +
> > >>>>>> +typedef struct CodecParserContext {
> > >>>>>> + const uint8_t *buf_ptr;
> > >>>>>> + const uint8_t *buf_end;
> > >>>>>> +} CodecParserContext;
> > >>>>>> +
> > >>>>>> +static const int eac3_sample_rate_tab[] = { 48000, 44100, 32000, 0 };
> > >>>>>> +
> > >>>>>> +void ff_hls_read_audio_setup_info(HLSAudioSetupInfo *info, const
> > >>>> uint8_t
> > >>>>>> *buf, size_t size)
> > >>>>>> +{
> > >>>>>> + if (size < 8)
> > >>>>>> + return;
> > >>>>>> +
> > >>>>>> + info->codec_tag = AV_RL32(buf);
> > >>>>>> +
> > >>>>>> + if (info->codec_tag == MKTAG('z','a', 'a', 'c'))
> > >>>>>> + info->codec_id = AV_CODEC_ID_AAC;
> > >>>>>> + else if (info->codec_tag == MKTAG('z','a', 'c', '3'))
> > >>>>>> + info->codec_id = AV_CODEC_ID_AC3;
> > >>>>>> + else if (info->codec_tag == MKTAG('z','e', 'c', '3'))
> > >>>>>> + info->codec_id = AV_CODEC_ID_EAC3;
> > >>>>>> + else
> > >>>>>> + info->codec_id = AV_CODEC_ID_NONE;
> > >>>>>> +
> > >>>>>> + buf += 4;
> > >>>>>> + info->priming = AV_RL16(buf);
> > >>>>>> + buf += 2;
> > >>>>>> + info->version = *buf++;
> > >>>>>> + info->setup_data_length = *buf++;
> > >>>>>> +
> > >>>>>> + if (info->setup_data_length > size - 8)
> > >>>>>> + info->setup_data_length = size - 8;
> > >>>>>> +
> > >>>>>> + if (info->setup_data_length > HLS_MAX_AUDIO_SETUP_DATA_LEN)
> > >>>>>> + return;
> > >>>>>> +
> > >>>>>> + memcpy(info->setup_data, buf, info->setup_data_length);
> > >>>>>> +}
> > >>>>>> +
> > >>>>>> +int ff_hls_parse_audio_setup_info(AVStream *st, HLSAudioSetupInfo
> > >>>> *info)
> > >>>>>> +{
> > >>>>>> + int ret = 0;
> > >>>>>> +
> > >>>>>> + st->codecpar->codec_tag = info->codec_tag;
> > >>>>>> +
> > >>>>>> + if (st->codecpar->codec_id == AV_CODEC_ID_AAC)
> > >>>>>> + return 0;
> > >>>>>> +
> > >>>>>> + if (st->codecpar->codec_id != AV_CODEC_ID_AC3 &&
> > >>>>>> st->codecpar->codec_id != AV_CODEC_ID_EAC3)
> > >>>>>> + return AVERROR_INVALIDDATA;
> > >>>>>> +
> > >>>>>> + if (st->codecpar->codec_id == AV_CODEC_ID_AC3) {
> > >>>>>> +
> > >>>>>> + AC3HeaderInfo *ac3hdr = NULL;
> > >>>>>> +
> > >>>>>> + ret = avpriv_ac3_parse_header(&ac3hdr, info->setup_data,
> > >>>>>> info->setup_data_length);
> > >>>>>> + if (ret < 0) {
> > >>>>>> + if (ret != AVERROR(ENOMEM))
> > >>>>>> + av_free(ac3hdr);
> > >>>>>> + return ret;
> > >>>>>> + }
> > >>>>>> +
> > >>>>>> + st->codecpar->sample_rate = ac3hdr->sample_rate;
> > >>>>>> + st->codecpar->channels = ac3hdr->channels;
> > >>>>>> + st->codecpar->channel_layout = ac3hdr->channel_layout;
> > >>>>>> + st->codecpar->bit_rate = ac3hdr->bit_rate;
> > >>>>>> +
> > >>>>>> + av_free(ac3hdr);
> > >>>>>> + } else { /* Parse 'dec3' EC3SpecificBox */
> > >>>>>> +
> > >>>>>> + GetBitContext gb;
> > >>>>>> + int data_rate, fscod, acmod, lfeon;
> > >>>>>> +
> > >>>>>> + ret = init_get_bits8(&gb, info->setup_data,
> > >>>>>> info->setup_data_length);
> > >>>>>> + if (ret < 0)
> > >>>>>> + return AVERROR_INVALIDDATA;
> > >>>>>> +
> > >>>>>> + data_rate = get_bits(&gb, 13);
> > >>>>>> + skip_bits(&gb, 3);
> > >>>>>> + fscod = get_bits(&gb, 2);
> > >>>>>> + skip_bits(&gb, 10);
> > >>>>>> + acmod = get_bits(&gb, 3);
> > >>>>>> + lfeon = get_bits(&gb, 1);
> > >>>>>> +
> > >>>>>> + st->codecpar->sample_rate = eac3_sample_rate_tab[fscod];
> > >>>>>> +
> > >>>>>> + st->codecpar->channel_layout =
> > >>>>>> avpriv_ac3_channel_layout_tab[acmod];
> > >>>>>> + if (lfeon)
> > >>>>>> + st->codecpar->channel_layout |= AV_CH_LOW_FREQUENCY;
> > >>>>>> +
> > >>>>>> + st->codecpar->channels =
> > >>>>>> av_get_channel_layout_nb_channels(st->codecpar->channel_layout);
> > >>>>>> +
> > >>>>>> + st->codecpar->bit_rate = data_rate*1000;
> > >>>>>> + }
> > >>>>>> +
> > >>>>>> + return 0;
> > >>>>>> +}
> > >>>>>> +
> > >>>>>> +/*
> > >>>>>> + * Remove start code emulation prevention 0x03 bytes
> > >>>>>> + */
> > >>>>>> +static void remove_scep_3_bytes(NALUnit *nalu)
> > >>>>>> +{
> > >>>>>> + int i = 0;
> > >>>>>> + int j = 0;
> > >>>>>> +
> > >>>>>> + uint8_t *data = nalu->data;
> > >>>>>> +
> > >>>>>> + while (i < nalu->length) {
> > >>>>>> + if (nalu->length - i > 3 && AV_RB24(&data[i]) == 0x000003) {
> > >>>>>> + data[j++] = data[i++];
> > >>>>>> + data[j++] = data[i++];
> > >>>>>> + i++;
> > >>>>>> + } else {
> > >>>>>> + data[j++] = data[i++];
> > >>>>>> + }
> > >>>>>> + }
> > >>>>>> +
> > >>>>>> + nalu->length = j;
> > >>>>>> +}
> > >>>>>> +
> > >>>>>> +static int get_next_nal_unit(CodecParserContext *ctx, NALUnit *nalu)
> > >>>>>> +{
> > >>>>>> + const uint8_t *nalu_start = ctx->buf_ptr;
> > >>>>>> +
> > >>>>>> + if (ctx->buf_end - ctx->buf_ptr >= 4 && AV_RB32(ctx->buf_ptr) ==
> > >>>>>> 0x00000001)
> > >>>>>> + nalu->start_code_length = 4;
> > >>>>>> + else if (ctx->buf_end - ctx->buf_ptr >= 3 && AV_RB24(ctx->buf_ptr)
> > >>>> ==
> > >>>>>> 0x000001)
> > >>>>>> + nalu->start_code_length = 3;
> > >>>>>> + else /* No start code at the beginning of the NAL unit */
> > >>>>>> + return -1;
> > >>>>>> +
> > >>>>>> + ctx->buf_ptr += nalu->start_code_length;
> > >>>>>> +
> > >>>>>> + while (ctx->buf_ptr < ctx->buf_end) {
> > >>>>>> + if (ctx->buf_end - ctx->buf_ptr >= 4 && AV_RB32(ctx->buf_ptr)
> > >>>> ==
> > >>>>>> 0x00000001)
> > >>>>>> + break;
> > >>>>>> + else if (ctx->buf_end - ctx->buf_ptr >= 3 &&
> > >>>>>> AV_RB24(ctx->buf_ptr) == 0x000001)
> > >>>>>> + break;
> > >>>>>> + ctx->buf_ptr++;
> > >>>>>> + }
> > >>>>>> +
> > >>>>>> + nalu->data = (uint8_t *)nalu_start + nalu->start_code_length;
> > >>>>>> + nalu->length = ctx->buf_ptr - nalu->data;
> > >>>>>> + nalu->type = *nalu->data & 0x1F;
> > >>>>>> +
> > >>>>>> + return 0;
> > >>>>>> +}
> > >>>>>> +
> > >>>>>> +static int decrypt_nal_unit(HLSCryptoContext *crypto_ctx, NALUnit
> > >>>> *nalu)
> > >>>>>> +{
> > >>>>>> + int ret = 0;
> > >>>>>> + int rem_bytes;
> > >>>>>> + uint8_t *data;
> > >>>>>> + uint8_t iv[16];
> > >>>>>> +
> > >>>>>> + ret = av_aes_init(crypto_ctx->aes_ctx, crypto_ctx->key, 16 * 8, 1);
> > >>>>>> + if (ret < 0)
> > >>>>>> + return ret;
> > >>>>>> +
> > >>>>>> + /* Remove start code emulation prevention 0x03 bytes */
> > >>>>>> + remove_scep_3_bytes(nalu);
> > >>>>>> +
> > >>>>>> + data = nalu->data + 32;
> > >>>>>> + rem_bytes = nalu->length - 32;
> > >>>>>> +
> > >>>>>> + memcpy(iv, crypto_ctx->iv, 16);
> > >>>>>> +
> > >>>>>> + while (rem_bytes > 0) {
> > >>>>>> + if (rem_bytes > 16) {
> > >>>>>> + av_aes_crypt(crypto_ctx->aes_ctx, data, data, 1, iv, 1);
> > >>>>>> + data += 16;
> > >>>>>> + rem_bytes -= 16;
> > >>>>>> + }
> > >>>>>> + data += FFMIN(144, rem_bytes);
> > >>>>>> + rem_bytes -= FFMIN(144, rem_bytes);
> > >>>>>> + }
> > >>>>>> +
> > >>>>>> + return 0;
> > >>>>>> +}
> > >>>>>> +
> > >>>>>> +static int decrypt_video_frame(HLSCryptoContext *crypto_ctx, AVPacket
> > >>>>>> *pkt)
> > >>>>>> +{
> > >>>>>> + int ret = 0;
> > >>>>>> + CodecParserContext ctx;
> > >>>>>> + NALUnit nalu;
> > >>>>>> + uint8_t *data_ptr;
> > >>>>>> + int move_nalu = 0;
> > >>>>>> +
> > >>>>>> + memset(&ctx, 0, sizeof(ctx));
> > >>>>>> + ctx.buf_ptr = pkt->data;
> > >>>>>> + ctx.buf_end = pkt->data + pkt->size;
> > >>>>>> +
> > >>>>>> + data_ptr = pkt->data;
> > >>>>>> +
> > >>>>>> + while (ctx.buf_ptr < ctx.buf_end) {
> > >>>>>> + memset(&nalu, 0, sizeof(nalu));
> > >>>>>> + ret = get_next_nal_unit(&ctx, &nalu);
> > >>>>>> + if (ret < 0)
> > >>>>>> + return ret;
> > >>>>>> + if ((nalu.type == 0x01 || nalu.type == 0x05) && nalu.length >
> > >>>> 48)
> > >>>>>> {
> > >>>>>> + int encrypted_nalu_length = nalu.length;
> > >>>>>> + ret = decrypt_nal_unit(crypto_ctx, &nalu);
> > >>>>>> + if (ret < 0)
> > >>>>>> + return ret;
> > >>>>>> + move_nalu = nalu.length != encrypted_nalu_length;
> > >>>>>> + }
> > >>>>>> + if (move_nalu)
> > >>>>>> + memmove(data_ptr, nalu.data - nalu.start_code_length,
> > >>>>>> nalu.start_code_length + nalu.length);
> > >>>>>> + data_ptr += nalu.start_code_length + nalu.length;
> > >>>>>> + }
> > >>>>>> +
> > >>>>>> + av_shrink_packet(pkt, data_ptr - pkt->data);
> > >>>>>> +
> > >>>>>> + return 0;
> > >>>>>> +}
> > >>>>>> +
> > >>>>>> +static int get_next_adts_frame(CodecParserContext *ctx, AudioFrame
> > >>>> *frame)
> > >>>>>> +{
> > >>>>>> + int ret = 0;
> > >>>>>> +
> > >>>>>> + AACADTSHeaderInfo *adts_hdr = NULL;
> > >>>>>> +
> > >>>>>> + /* Find next sync word 0xFFF */
> > >>>>>> + while (ctx->buf_ptr < ctx->buf_end - 1) {
> > >>>>>> + if (*ctx->buf_ptr == 0xFF && *(ctx->buf_ptr + 1) & 0xF0 ==
> > >>>> 0xF0)
> > >>>>>> + break;
> > >>>>>> + ctx->buf_ptr++;
> > >>>>>> + }
> > >>>>>> +
> > >>>>>> + if (ctx->buf_ptr >= ctx->buf_end - 1)
> > >>>>>> + return -1;
> > >>>>>> +
> > >>>>>> + frame->data = (uint8_t*)ctx->buf_ptr;
> > >>>>>> +
> > >>>>>> + ret = avpriv_adts_header_parse (&adts_hdr, frame->data,
> > >>>> ctx->buf_end
> > >>>>>> - frame->data);
> > >>>>>> + if (ret < 0)
> > >>>>>> + return ret;
> > >>>>>> +
> > >>>>>> + frame->header_length = adts_hdr->crc_absent ?
> > >>>> AV_AAC_ADTS_HEADER_SIZE
> > >>>>>> : AV_AAC_ADTS_HEADER_SIZE + 2;
> > >>>>>> + frame->length = adts_hdr->frame_length;
> > >>>>>> +
> > >>>>>> + av_free(adts_hdr);
> > >>>>>> +
> > >>>>>> + return 0;
> > >>>>>> +}
> > >>>>>> +
> > >>>>>> +static int get_next_ac3_eac3_sync_frame(CodecParserContext *ctx,
> > >>>>>> AudioFrame *frame)
> > >>>>>> +{
> > >>>>>> + int ret = 0;
> > >>>>>> +
> > >>>>>> + AC3HeaderInfo *hdr = NULL;
> > >>>>>> +
> > >>>>>> + /* Find next sync word 0x0B77 */
> > >>>>>> + while (ctx->buf_ptr < ctx->buf_end - 1) {
> > >>>>>> + if (*ctx->buf_ptr == 0x0B && *(ctx->buf_ptr + 1) == 0x77)
> > >>>>>> + break;
> > >>>>>> + ctx->buf_ptr++;
> > >>>>>> + }
> > >>>>>> +
> > >>>>>> + if (ctx->buf_ptr >= ctx->buf_end - 1)
> > >>>>>> + return -1;
> > >>>>>> +
> > >>>>>> + frame->data = (uint8_t*)ctx->buf_ptr;
> > >>>>>> + frame->header_length = 0;
> > >>>>>> +
> > >>>>>> + ret = avpriv_ac3_parse_header(&hdr, frame->data, ctx->buf_end -
> > >>>>>> frame->data);
> > >>>>>> + if (ret < 0) {
> > >>>>>> + if (ret != AVERROR(ENOMEM))
> > >>>>>> + av_free(hdr);
> > >>>>>> + return ret;
> > >>>>>> + }
> > >>>>>> +
> > >>>>>> + frame->length = hdr->frame_size;
> > >>>>>> +
> > >>>>>> + av_free(hdr);
> > >>>>>> +
> > >>>>>> + return 0;
> > >>>>>> +}
> > >>>>>> +
> > >>>>>> +static int get_next_sync_frame(enum AVCodecID codec_id,
> > >>>>>> CodecParserContext *ctx, AudioFrame *frame)
> > >>>>>> +{
> > >>>>>> + if (codec_id == AV_CODEC_ID_AAC)
> > >>>>>> + return get_next_adts_frame(ctx, frame);
> > >>>>>> + else if (codec_id == AV_CODEC_ID_AC3 || codec_id ==
> > >>>> AV_CODEC_ID_EAC3)
> > >>>>>> + return get_next_ac3_eac3_sync_frame(ctx, frame);
> > >>>>>> + else
> > >>>>>> + return AVERROR_INVALIDDATA;
> > >>>>>> +}
> > >>>>>> +
> > >>>>>> +static int decrypt_sync_frame(enum AVCodecID codec_id, HLSCryptoContext
> > >>>>>> *crypto_ctx, AudioFrame *frame)
> > >>>>>> +{
> > >>>>>> + int ret = 0;
> > >>>>>> + uint8_t *data;
> > >>>>>> + int num_of_encrypted_blocks;
> > >>>>>> +
> > >>>>>> + ret = av_aes_init(crypto_ctx->aes_ctx, crypto_ctx->key, 16 * 8, 1);
> > >>>>>> + if (ret < 0)
> > >>>>>> + return ret;
> > >>>>>> +
> > >>>>>> + data = frame->data + frame->header_length + 16;
> > >>>>>> +
> > >>>>>> + num_of_encrypted_blocks = (frame->length - frame->header_length -
> > >>>>>> 16)/16;
> > >>>>>> +
> > >>>>>> + av_aes_crypt(crypto_ctx->aes_ctx, data, data,
> > >>>>>> num_of_encrypted_blocks, crypto_ctx->iv, 1);
> > >>>>>> +
> > >>>>>> + return 0;
> > >>>>>> +}
> > >>>>>> +
> > >>>>>> +static int decrypt_audio_frame(enum AVCodecID codec_id,
> > >>>> HLSCryptoContext
> > >>>>>> *crypto_ctx, AVPacket *pkt)
> > >>>>>> +{
> > >>>>>> + int ret = 0;
> > >>>>>> + CodecParserContext ctx;
> > >>>>>> + AudioFrame frame;
> > >>>>>> +
> > >>>>>> + memset(&ctx, 0, sizeof(ctx));
> > >>>>>> + ctx.buf_ptr = pkt->data;
> > >>>>>> + ctx.buf_end = pkt->data + pkt->size;
> > >>>>>> +
> > >>>>>> + while (ctx.buf_ptr < ctx.buf_end) {
> > >>>>>> + memset(&frame, 0, sizeof(frame));
> > >>>>>> + ret = get_next_sync_frame(codec_id, &ctx, &frame);
> > >>>>>> + if (ret < 0)
> > >>>>>> + return ret;
> > >>>>>> + if (frame.length - frame.header_length > 31) {
> > >>>>>> + ret = decrypt_sync_frame(codec_id, crypto_ctx, &frame);
> > >>>>>> + if (ret < 0)
> > >>>>>> + return ret;
> > >>>>>> + }
> > >>>>>> + ctx.buf_ptr += frame.length;
> > >>>>>> + }
> > >>>>>> +
> > >>>>>> + return 0;
> > >>>>>> +}
> > >>>>>> +
> > >>>>>> +int ff_hls_decrypt_frame(enum AVCodecID codec_id, HLSCryptoContext
> > >>>>>> *crypto_ctx, AVPacket *pkt)
> > >>>>>> +{
> > >>>>>> + if (codec_id == AV_CODEC_ID_H264)
> > >>>>>> + return decrypt_video_frame(crypto_ctx, pkt);
> > >>>>>> + else if (codec_id == AV_CODEC_ID_AAC || codec_id == AV_CODEC_ID_AC3
> > >>>>>> || codec_id == AV_CODEC_ID_EAC3)
> > >>>>>> + return decrypt_audio_frame(codec_id, crypto_ctx, pkt);
> > >>>>>> +
> > >>>>>> + return AVERROR_INVALIDDATA;
> > >>>>>> +}
> > >>>>>> diff --git a/libavformat/hls_sample_aes.h b/libavformat/hls_sample_aes.h
> > >>>>>> new file mode 100644
> > >>>>>> index 0000000000..cf80e41cb0
> > >>>>>> --- /dev/null
> > >>>>>> +++ b/libavformat/hls_sample_aes.h
> > >>>>>> @@ -0,0 +1,66 @@
> > >>>>>> +/*
> > >>>>>> + * Apple HTTP Live Streaming Sample Encryption/Decryption
> > >>>>>> + *
> > >>>>>> + * Copyright (c) 2021 Nachiket Tarate
> > >>>>>> + *
> > >>>>>> + * This file is part of FFmpeg.
> > >>>>>> + *
> > >>>>>> + * FFmpeg is free software; you can redistribute it and/or
> > >>>>>> + * modify it under the terms of the GNU Lesser General Public
> > >>>>>> + * License as published by the Free Software Foundation; either
> > >>>>>> + * version 2.1 of the License, or (at your option) any later version.
> > >>>>>> + *
> > >>>>>> + * FFmpeg is distributed in the hope that it will be useful,
> > >>>>>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> > >>>>>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> > >>>>>> + * Lesser General Public License for more details.
> > >>>>>> + *
> > >>>>>> + * You should have received a copy of the GNU Lesser General Public
> > >>>>>> + * License along with FFmpeg; if not, write to the Free Software
> > >>>>>> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> > >>>>>> 02110-1301 USA
> > >>>>>> + */
> > >>>>>> +
> > >>>>>> +/**
> > >>>>>> + * @file
> > >>>>>> + * Apple HTTP Live Streaming Sample Encryption
> > >>>>>> + *
> > >>>>>>
> > >>>> https://developer.apple.com/library/ios/documentation/AudioVideo/Conceptual/HLS_Sample_Encryption
> > >>>>>> + */
> > >>>>>> +
> > >>>>>> +#ifndef AVFORMAT_HLS_SAMPLE_AES_H
> > >>>>>> +#define AVFORMAT_HLS_SAMPLE_AES_H
> > >>>>>> +
> > >>>>>> +#include <stdint.h>
> > >>>>>> +
> > >>>>>> +#include "avformat.h"
> > >>>>>> +
> > >>>>>> +#include "libavcodec/avcodec.h"
> > >>>>>> +#include "libavutil/aes.h"
> > >>>>>> +
> > >>>>>> +#define HLS_MAX_ID3_TAGS_DATA_LEN 138
> > >>>>>> +#define HLS_MAX_AUDIO_SETUP_DATA_LEN 10
> > >>>>>> +
> > >>>>>> +
> > >>>>>> +typedef struct HLSCryptoContext {
> > >>>>>> + struct AVAES *aes_ctx;
> > >>>>>> + uint8_t key[16];
> > >>>>>> + uint8_t iv[16];
> > >>>>>> +} HLSCryptoContext;
> > >>>>>> +
> > >>>>>> +typedef struct HLSAudioSetupInfo {
> > >>>>>> + enum AVCodecID codec_id;
> > >>>>>> + uint32_t codec_tag;
> > >>>>>> + uint16_t priming;
> > >>>>>> + uint8_t version;
> > >>>>>> + uint8_t setup_data_length;
> > >>>>>> + uint8_t setup_data[HLS_MAX_AUDIO_SETUP_DATA_LEN];
> > >>>>>> +} HLSAudioSetupInfo;
> > >>>>>> +
> > >>>>>> +
> > >>>>>> +void ff_hls_read_audio_setup_info(HLSAudioSetupInfo *info, const
> > >>>> uint8_t
> > >>>>>> *buf, size_t size);
> > >>>>>> +
> > >>>>>> +int ff_hls_parse_audio_setup_info(AVStream *st, HLSAudioSetupInfo
> > >>>> *info);
> > >>>>>> +
> > >>>>>> +int ff_hls_decrypt_frame(enum AVCodecID codec_id, HLSCryptoContext
> > >>>>>> *crypto_ctx, AVPacket *pkt);
> > >>>>>> +
> > >>>>>> +#endif /* AVFORMAT_HLS_SAMPLE_AES_H */
> > >>>>>> +
> > >>>>>> diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
> > >>>>>> index e283ec09d7..dc611ae788 100644
> > >>>>>> --- a/libavformat/mpegts.c
> > >>>>>> +++ b/libavformat/mpegts.c
> > >>>>>> @@ -839,6 +839,16 @@ static const StreamType MISC_types[] = {
> > >>>>>> { 0 },
> > >>>>>> };
> > >>>>>>
> > >>>>>> +/* HLS Sample Encryption Types */
> > >>>>>> +static const StreamType HLS_SAMPLE_ENC_types[] = {
> > >>>>>> + { 0xdb, AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_H264},
> > >>>>>> + { 0xcf, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AAC },
> > >>>>>> + { 0xc1, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3 },
> > >>>>>> + { 0xc2, AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_EAC3},
> > >>>>>> + { 0 },
> > >>>>>> +};
> > >>>>>> +
> > >>>>>> +
> > >>>>>> static const StreamType REGD_types[] = {
> > >>>>>> { MKTAG('d', 'r', 'a', 'c'), AVMEDIA_TYPE_VIDEO, AV_CODEC_ID_DIRAC
> > >>>> },
> > >>>>>> { MKTAG('A', 'C', '-', '3'), AVMEDIA_TYPE_AUDIO, AV_CODEC_ID_AC3
> > >>>> },
> > >>>>>> @@ -948,6 +958,8 @@ static int mpegts_set_stream_info(AVStream *st,
> > >>>>>> PESContext *pes,
> > >>>>>> }
> > >>>>>> if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
> > >>>>>> mpegts_find_stream_type(st, pes->stream_type, MISC_types);
> > >>>>>> + if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
> > >>>>>> + mpegts_find_stream_type(st, pes->stream_type,
> > >>>>>> HLS_SAMPLE_ENC_types);
> > >>>>>> if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
> > >>>>>> st->codecpar->codec_id = old_codec_id;
> > >>>>>> st->codecpar->codec_type = old_codec_type;
> > >>>>>> --
> > >>>>>> 2.17.1
> > >>>>>>
> > >>>>>>
> > >>>>> _______________________________________________
> > >>>>> ffmpeg-devel mailing list
> > >>>>> ffmpeg-devel at ffmpeg.org
> > >>>>> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> > >>>>>
> > >>>>> To unsubscribe, visit link above, or email
> > >>>>> ffmpeg-devel-request at ffmpeg.org with subject "unsubscribe".
> > >>>>
> > >>>> Thanks
> > >>>>
> > >>>> Steven Liu
> > >>>>
> > >>>>
> > >>>>
> > >>>> _______________________________________________
> > >>>> ffmpeg-devel mailing list
> > >>>> ffmpeg-devel at ffmpeg.org
> > >>>> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> > >>>>
> > >>>> To unsubscribe, visit link above, or email
> > >>>> ffmpeg-devel-request at ffmpeg.org with subject "unsubscribe".
> > >>> _______________________________________________
> > >>> ffmpeg-devel mailing list
> > >>> ffmpeg-devel at ffmpeg.org
> > >>> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> > >>>
> > >>> To unsubscribe, visit link above, or email
> > >>> ffmpeg-devel-request at ffmpeg.org with subject "unsubscribe".
> > >>
> > >> Thanks
> > >>
> > >> Steven Liu
> > >>
> > >>
> > >>
> > >> _______________________________________________
> > >> ffmpeg-devel mailing list
> > >> ffmpeg-devel at ffmpeg.org
> > >> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> > >>
> > >> To unsubscribe, visit link above, or email
> > >> ffmpeg-devel-request at ffmpeg.org with subject "unsubscribe".
> >
> > Thanks
> >
> > Steven Liu
> >
> >
> >
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