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/* GStreamer
* Copyright (C) 2010 Marc-Andre Lureau <marcandre.lureau@gmail.com>
* Copyright (C) 2010 Andoni Morales Alastruey <ylatuya@gmail.com>
* Copyright (C) 2015 Tim-Philipp Müller <tim@centricular.com>
*
* gsthlsdemux.h:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_HLS_DEMUX_H__
#define __GST_HLS_DEMUX_H__
#include <gst/gst.h>
#include "m3u8.h"
#include <gst/adaptivedemux/gstadaptivedemux.h>
#if defined(HAVE_OPENSSL)
#include <openssl/evp.h>
#elif defined(HAVE_NETTLE)
#include <nettle/aes.h>
#include <nettle/cbc.h>
#elif defined(HAVE_LIBGCRYPT)
#include <gcrypt.h>
#endif
G_BEGIN_DECLS
#define GST_TYPE_HLS_DEMUX \
(gst_hls_demux_get_type())
#define GST_HLS_DEMUX(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_HLS_DEMUX,GstHLSDemux))
#define GST_HLS_DEMUX_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_HLS_DEMUX,GstHLSDemuxClass))
#define GST_IS_HLS_DEMUX(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_HLS_DEMUX))
#define GST_IS_HLS_DEMUX_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_HLS_DEMUX))
#define GST_HLS_DEMUX_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_HLS_DEMUX,GstHLSDemuxClass))
#define GST_HLS_DEMUX_CAST(obj) \
((GstHLSDemux *)obj)
typedef struct _GstHLSDemux GstHLSDemux;
typedef struct _GstHLSDemuxClass GstHLSDemuxClass;
typedef struct _GstHLSDemuxStream GstHLSDemuxStream;
typedef struct _GstHLSTSReader GstHLSTSReader;
#define GST_HLS_DEMUX_STREAM_CAST(stream) ((GstHLSDemuxStream *)(stream))
typedef enum {
GST_HLS_TSREADER_NONE,
GST_HLS_TSREADER_MPEGTS,
GST_HLS_TSREADER_ID3
} GstHLSTSReaderType;
struct _GstHLSTSReader
{
GstHLSTSReaderType rtype;
gboolean have_id3;
gint packet_size;
gint pmt_pid;
gint pcr_pid;
GstClockTime last_pcr;
GstClockTime first_pcr;
};
struct _GstHLSDemuxStream
{
GstAdaptiveDemuxStream adaptive_demux_stream;
GstHLSTSReaderType stream_type;
GstM3U8 *playlist;
gboolean is_primary_playlist;
gboolean do_typefind; /* Whether we need to typefind the next buffer */
GstBuffer *pending_typefind_buffer; /* for collecting data until typefind succeeds */
GstAdapter *pending_encrypted_data; /* for chunking data into 16 byte multiples for decryption */
GstBuffer *pending_decrypted_buffer; /* last decrypted buffer for pkcs7 unpadding.
We only know that it is the last at EOS */
guint64 current_offset; /* offset we're currently at */
gboolean reset_pts;
/* decryption tooling */
#if defined(HAVE_OPENSSL)
# if OPENSSL_VERSION_NUMBER < 0x10100000L
EVP_CIPHER_CTX aes_ctx;
# else
EVP_CIPHER_CTX *aes_ctx;
# endif
#elif defined(HAVE_NETTLE)
struct CBC_CTX (struct aes128_ctx, AES_BLOCK_SIZE) aes_ctx;
#elif defined(HAVE_LIBGCRYPT)
gcry_cipher_hd_t aes_ctx;
#endif
gchar *current_key;
guint8 *current_iv;
/* Accumulator for reading PAT/PMT/PCR from
* the stream so we can set timestamps/segments
* and switch cleanly */
GstBuffer *pending_pcr_buffer;
GstHLSTSReader tsreader;
};
typedef struct {
guint8 data[16];
} GstHLSKey;
/**
* GstHLSDemux:
*
* Opaque #GstHLSDemux data structure.
*/
struct _GstHLSDemux
{
GstAdaptiveDemux parent;
gint srcpad_counter;
/* Decryption key cache: url => GstHLSKey */
GHashTable *keys;
GMutex keys_lock;
/* FIXME: check locking, protected automatically by manifest_lock already? */
/* The master playlist with the available variant streams */
GstHLSMasterPlaylist *master;
GstHLSVariantStream *current_variant;
/* The previous variant, used to transition streams over */
GstHLSVariantStream *previous_variant;
gboolean streams_aware;
};
struct _GstHLSDemuxClass
{
GstAdaptiveDemuxClass parent_class;
};
void gst_hlsdemux_tsreader_init (GstHLSTSReader *r);
void gst_hlsdemux_tsreader_set_type (GstHLSTSReader *r, GstHLSTSReaderType rtype);
gboolean gst_hlsdemux_tsreader_find_pcrs (GstHLSTSReader *r, GstBuffer **buffer,
GstClockTime *first_pcr, GstClockTime *last_pcr, GstTagList **tags);
GType gst_hls_demux_get_type (void);
G_END_DECLS
#endif /* __GST_HLS_DEMUX_H__ */
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