2 * Copyright (C) 2010 Marc-Andre Lureau <marcandre.lureau@gmail.com>
3 * Copyright (C) 2010 Andoni Morales Alastruey <ylatuya@gmail.com>
4 * Copyright (C) 2015 Tim-Philipp Müller <tim@centricular.com>
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
25 #ifndef __GST_HLS_DEMUX_H__
26 #define __GST_HLS_DEMUX_H__
30 #include <gst/adaptivedemux/gstadaptivedemux.h>
31 #if defined(HAVE_OPENSSL)
32 #include <openssl/evp.h>
33 #elif defined(HAVE_NETTLE)
34 #include <nettle/aes.h>
35 #include <nettle/cbc.h>
36 #elif defined(HAVE_LIBGCRYPT)
42 #define GST_TYPE_HLS_DEMUX \
43 (gst_hls_demux_get_type())
44 #define GST_HLS_DEMUX(obj) \
45 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_HLS_DEMUX,GstHLSDemux))
46 #define GST_HLS_DEMUX_CLASS(klass) \
47 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_HLS_DEMUX,GstHLSDemuxClass))
48 #define GST_IS_HLS_DEMUX(obj) \
49 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_HLS_DEMUX))
50 #define GST_IS_HLS_DEMUX_CLASS(klass) \
51 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_HLS_DEMUX))
52 #define GST_HLS_DEMUX_GET_CLASS(obj) \
53 (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_HLS_DEMUX,GstHLSDemuxClass))
54 #define GST_HLS_DEMUX_CAST(obj) \
57 typedef struct _GstHLSDemux GstHLSDemux;
58 typedef struct _GstHLSDemuxClass GstHLSDemuxClass;
59 typedef struct _GstHLSDemuxStream GstHLSDemuxStream;
60 typedef struct _GstHLSTSReader GstHLSTSReader;
62 #define GST_HLS_DEMUX_STREAM_CAST(stream) ((GstHLSDemuxStream *)(stream))
65 GST_HLS_TSREADER_NONE,
66 GST_HLS_TSREADER_MPEGTS,
70 struct _GstHLSTSReader
72 GstHLSTSReaderType rtype;
79 GstClockTime last_pcr;
80 GstClockTime first_pcr;
83 struct _GstHLSDemuxStream
85 GstAdaptiveDemuxStream adaptive_demux_stream;
87 GstHLSTSReaderType stream_type;
90 gboolean is_primary_playlist;
92 gboolean do_typefind; /* Whether we need to typefind the next buffer */
93 GstBuffer *pending_typefind_buffer; /* for collecting data until typefind succeeds */
95 GstAdapter *pending_encrypted_data; /* for chunking data into 16 byte multiples for decryption */
96 GstBuffer *pending_decrypted_buffer; /* last decrypted buffer for pkcs7 unpadding.
97 We only know that it is the last at EOS */
98 guint64 current_offset; /* offset we're currently at */
101 /* decryption tooling */
102 #if defined(HAVE_OPENSSL)
103 # if OPENSSL_VERSION_NUMBER < 0x10100000L
104 EVP_CIPHER_CTX aes_ctx;
106 EVP_CIPHER_CTX *aes_ctx;
108 #elif defined(HAVE_NETTLE)
109 struct CBC_CTX (struct aes128_ctx, AES_BLOCK_SIZE) aes_ctx;
110 #elif defined(HAVE_LIBGCRYPT)
111 gcry_cipher_hd_t aes_ctx;
117 /* Accumulator for reading PAT/PMT/PCR from
118 * the stream so we can set timestamps/segments
119 * and switch cleanly */
120 GstBuffer *pending_pcr_buffer;
122 GstHLSTSReader tsreader;
132 * Opaque #GstHLSDemux data structure.
136 GstAdaptiveDemux parent;
140 /* Decryption key cache: url => GstHLSKey */
144 /* FIXME: check locking, protected automatically by manifest_lock already? */
145 /* The master playlist with the available variant streams */
146 GstHLSMasterPlaylist *master;
148 GstHLSVariantStream *current_variant;
149 /* The previous variant, used to transition streams over */
150 GstHLSVariantStream *previous_variant;
152 gboolean streams_aware;
155 struct _GstHLSDemuxClass
157 GstAdaptiveDemuxClass parent_class;
161 void gst_hlsdemux_tsreader_init (GstHLSTSReader *r);
162 void gst_hlsdemux_tsreader_set_type (GstHLSTSReader *r, GstHLSTSReaderType rtype);
164 gboolean gst_hlsdemux_tsreader_find_pcrs (GstHLSTSReader *r, GstBuffer **buffer,
165 GstClockTime *first_pcr, GstClockTime *last_pcr, GstTagList **tags);
167 GType gst_hls_demux_get_type (void);
170 #endif /* __GST_HLS_DEMUX_H__ */