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6697feae5f
Add demuxer instance-wide decryption key cache. The current and last key url are per-stream, so make a shared cache. Move the decryption handling into the stream object, and use the shared cache for the keys.
125 lines
3.7 KiB
C
125 lines
3.7 KiB
C
/* GStreamer
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* Copyright (C) 2010 Marc-Andre Lureau <marcandre.lureau@gmail.com>
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* Copyright (C) 2010 Andoni Morales Alastruey <ylatuya@gmail.com>
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*
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* gsthlsdemux.h:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_HLS_DEMUX_H__
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#define __GST_HLS_DEMUX_H__
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#include <gst/gst.h>
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#include "m3u8.h"
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#include "gsthls.h"
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#include <gst/adaptivedemux/gstadaptivedemux.h>
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#if defined(HAVE_OPENSSL)
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#include <openssl/evp.h>
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#elif defined(HAVE_NETTLE)
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#include <nettle/aes.h>
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#include <nettle/cbc.h>
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#else
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#include <gcrypt.h>
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#endif
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G_BEGIN_DECLS
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#define GST_TYPE_HLS_DEMUX \
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(gst_hls_demux_get_type())
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#define GST_HLS_DEMUX(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_HLS_DEMUX,GstHLSDemux))
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#define GST_HLS_DEMUX_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_HLS_DEMUX,GstHLSDemuxClass))
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#define GST_IS_HLS_DEMUX(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_HLS_DEMUX))
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#define GST_IS_HLS_DEMUX_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_HLS_DEMUX))
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#define GST_HLS_DEMUX_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_HLS_DEMUX,GstHLSDemuxClass))
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#define GST_HLS_DEMUX_CAST(obj) \
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((GstHLSDemux *)obj)
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typedef struct _GstHLSDemux GstHLSDemux;
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typedef struct _GstHLSDemuxClass GstHLSDemuxClass;
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typedef struct _GstHLSDemuxStream GstHLSDemuxStream;
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#define GST_HLS_DEMUX_STREAM_CAST(stream) ((GstHLSDemuxStream *)(stream))
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struct _GstHLSDemuxStream
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{
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GstAdaptiveDemux adaptive_demux_stream;
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gboolean do_typefind; /* Whether we need to typefind the next buffer */
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GstBuffer *pending_typefind_buffer; /* for collecting data until typefind succeeds */
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GstAdapter *pending_encrypted_data; /* for chunking data into 16 byte multiples for decryption */
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GstBuffer *pending_decrypted_buffer; /* last decrypted buffer for pkcs7 unpadding.
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We only know that it is the last at EOS */
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guint64 current_offset; /* offset we're currently at */
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gboolean reset_pts;
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/* decryption tooling */
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#if defined(HAVE_OPENSSL)
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EVP_CIPHER_CTX aes_ctx;
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#elif defined(HAVE_NETTLE)
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struct CBC_CTX (struct aes_ctx, AES_BLOCK_SIZE) aes_ctx;
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#else
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gcry_cipher_hd_t aes_ctx;
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#endif
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gchar *current_key;
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guint8 *current_iv;
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GstBuffer *pending_buffer; /* decryption scenario:
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* the last buffer can only be pushed when
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* resized, so need to store and wait for
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* EOS to know it is the last */
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};
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typedef struct {
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guint8 data[16];
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} GstHLSKey;
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/**
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* GstHLSDemux:
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*
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* Opaque #GstHLSDemux data structure.
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*/
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struct _GstHLSDemux
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{
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GstAdaptiveDemux parent;
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gint srcpad_counter;
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gchar *uri; /* Original playlist URI */
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GstM3U8Client *client; /* M3U8 client */
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/* Decryption key cache: url => GstHLSKey */
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GHashTable *keys;
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GMutex keys_lock;
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};
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struct _GstHLSDemuxClass
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{
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GstAdaptiveDemuxClass parent_class;
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};
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GType gst_hls_demux_get_type (void);
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G_END_DECLS
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#endif /* __GST_HLS_DEMUX_H__ */
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