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gstreamer/ext/curl/gstcurlhttpsrc.h
Alex Ashley e9c68347f0 curlhttpsrc: add support for range GET 
To allow curlhttpsrc to support DASH streams that use the on-demand
profile, it needs to support HTTP Range GETs. In GStreamer, the RANGE
is specified by issuing a GST_FORMAT_BYTES seek to set the start and
end of the range. curlhttpsrc needs to implement seek and set the
appropriate curl options to make it add the Range header to the
request.
2019-11-17 14:28:25 +00:00

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/*
* GstCurlHttpSrc
* Copyright 2017 British Broadcasting Corporation - Research and Development
*
* Author: Sam Hurst <samuelh@rd.bbc.co.uk>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Alternatively, the contents of this file may be used under the
* GNU Lesser General Public License Version 2.1 (the "LGPL"), in
* which case the following provisions apply instead of the ones
* mentioned above:
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* This header file contains definitions only for
*/
#ifndef GSTCURLHTTPSRC_H_
#define GSTCURLHTTPSRC_H_
#include <gst/gst.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <unistd.h>
#include <gst/base/gstpushsrc.h>
#include "curltask.h"
G_BEGIN_DECLS
/* #defines don't like whitespacey bits */
#define GST_TYPE_CURLHTTPSRC \
(gst_curl_http_src_get_type())
#define GST_CURLHTTPSRC(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CURLHTTPSRC,GstCurlHttpSrc))
#define GST_CURLHTTPSRC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CURLHTTPSRC,GstCurlHttpSrcClass))
#define GST_IS_CURLHTTPSRC(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CURLHTTPSRC))
#define GST_IS_CURLHTTPSRC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CURLHTTPSRC))
#if GSTCURL_FUNCTIONTRACE
#define GSTCURL_FUNCTION_ENTRY(x) GST_DEBUG_OBJECT(x, "Entering function");
#define GSTCURL_FUNCTION_EXIT(x) GST_DEBUG_OBJECT(x, "Leaving function");
#else
#define GSTCURL_FUNCTION_ENTRY(x)
#define GSTCURL_FUNCTION_EXIT(x)
#endif
typedef struct _GstCurlHttpSrc GstCurlHttpSrc;
typedef struct _GstCurlHttpSrcClass GstCurlHttpSrcClass;
typedef struct _GstCurlHttpSrcMultiTaskContext GstCurlHttpSrcMultiTaskContext;
typedef struct _GstCurlHttpSrcQueueElement GstCurlHttpSrcQueueElement;
#define HTTP_HEADERS_NAME "http-headers"
#define HTTP_STATUS_CODE "http-status-code"
#define URI_NAME "uri"
#define REQUEST_HEADERS_NAME "request-headers"
#define RESPONSE_HEADERS_NAME "response-headers"
#define REDIRECT_URI_NAME "redirection-uri"
typedef enum
{
GSTCURL_HTTP_VERSION_1_0,
GSTCURL_HTTP_VERSION_1_1,
#ifdef CURL_VERSION_HTTP2
GSTCURL_HTTP_VERSION_2_0,
#endif
GSTCURL_HTTP_NOT, /* For future use if HTTP protocol not used! */
GSTCURL_HTTP_VERSION_MAX
} GstCurlHttpVersion;
typedef enum _GstCGstCurlHttpSrcSeekable
{
GSTCURL_SEEKABLE_UNKNOWN,
GSTCURL_SEEKABLE_TRUE,
GSTCURL_SEEKABLE_FALSE
} GstCGstCurlHttpSrcSeekable;
struct _GstCurlHttpSrcMultiTaskContext
{
GstTask *task;
GRecMutex task_rec_mutex;
GMutex mutex;
guint refcount;
GCond signal;
GstCurlHttpSrcQueueElement *queue;
enum
{
GSTCURL_MULTI_LOOP_STATE_RUNNING,
GSTCURL_MULTI_LOOP_STATE_STOP
} state;
/* < private > */
CURLM *multi_handle;
};
struct _GstCurlHttpSrcClass
{
GstPushSrcClass parent_class;
GstCurlHttpSrcMultiTaskContext multi_task_context;
};
/*
* Our instance class.
*/
struct _GstCurlHttpSrc
{
GstPushSrc element;
/* < private > */
GMutex uri_mutex; /* Make the URIHandler get/set thread safe */
/*
* Things to tell libcURL about to build up the request message.
*/
/* Type Name Curl Option */
gchar *uri; /* CURLOPT_URL */
gchar *redirect_uri; /* CURLINFO_REDIRECT_URL */
gchar *username; /* CURLOPT_USERNAME */
gchar *password; /* CURLOPT_PASSWORD */
gchar *proxy_uri; /* CURLOPT_PROXY */
gchar *no_proxy_list; /* CURLOPT_NOPROXY */
gchar *proxy_user; /* CURLOPT_PROXYUSERNAME */
gchar *proxy_pass; /* CURLOPT_PROXYPASSWORD */
/* Header options */
gchar **cookies; /* CURLOPT_COOKIELIST */
gint number_cookies;
gchar *user_agent; /* CURLOPT_USERAGENT */
GstStructure *request_headers; /* CURLOPT_HTTPHEADER */
struct curl_slist *slist;
gboolean accept_compressed_encodings; /* CURLOPT_ACCEPT_ENCODING */
gint64 request_position; /* Seek to this position. */
gint64 stop_position; /* Stop at this position. */
/* Connection options */
glong allow_3xx_redirect; /* CURLOPT_FOLLOWLOCATION */
glong max_3xx_redirects; /* CURLOPT_MAXREDIRS */
gboolean keep_alive; /* CURLOPT_TCP_KEEPALIVE */
gint timeout_secs; /* CURLOPT_TIMEOUT */
gboolean strict_ssl; /* CURLOPT_SSL_VERIFYPEER */
gchar* custom_ca_file; /* CURLOPT_CAINFO */
gint total_retries;
gint retries_remaining;
/*TODO As the following are all multi options, move these to curl task */
guint max_connection_time; /* */
guint max_conns_per_server; /* CURLMOPT_MAX_HOST_CONNECTIONS */
guint max_conns_per_proxy; /* ?!? */
guint max_conns_global; /* CURLMOPT_MAXCONNECTS */
/* END multi options */
/* Some stuff for HTTP/2 */
GstCurlHttpVersion preferred_http_version;
enum
{
GSTCURL_NONE,
GSTCURL_OK,
GSTCURL_DONE,
GSTCURL_UNLOCK,
GSTCURL_REMOVED,
GSTCURL_BAD_QUEUE_REQUEST,
GSTCURL_TOTAL_ERROR,
GSTCURL_PIPELINE_NULL,
GSTCURL_MAX
} state, pending_state;
CURL *curl_handle;
GMutex buffer_mutex;
GCond buffer_cond;
gchar *buffer;
guint buffer_len;
gboolean transfer_begun;
gboolean data_received;
enum {
GSTCURL_NOT_CONNECTED,
GSTCURL_CONNECTED,
GSTCURL_WANT_REMOVAL
} connection_status;
/*
* Response Headers
*/
GstStructure *http_headers;
gchar *content_type;
guint status_code;
gchar *reason_phrase;
gboolean hdrs_updated;
guint64 content_size;
GstCGstCurlHttpSrcSeekable seekable;
CURLcode curl_result;
char curl_errbuf[CURL_ERROR_SIZE];
GstCaps *caps;
};
GType gst_curl_http_src_get_type (void);
G_END_DECLS
#endif /* GSTCURLHTTPSRC_H_ */
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