新增视频流播放

vlcdemo/vlc/vlc2/include/plugins/vlc_stream.h

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+/*****************************************************************************
+ * vlc_stream.h: Stream (between access and demux) descriptor and methods
+ *****************************************************************************
+ * Copyright (C) 1999-2004 VLC authors and VideoLAN
+ * $Id: 10a98ef2811fdfddb4b934c04806fea6813aaab5 $
+ *
+ * Authors: Laurent Aimar <fenrir@via.ecp.fr>
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifndef VLC_STREAM_H
+#define VLC_STREAM_H 1
+
+#include <vlc_block.h>
+
+/**
+ * \file
+ * This file defines structures and functions for stream (between access and demux) descriptor in vlc
+ */
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+/**
+ * \defgroup stream Stream
+ *
+ *  This will allow you to easily handle read/seek in demuxer modules.
+ * @{
+ */
+
+/* Opaque definition for text reader context */
+typedef struct stream_text_t stream_text_t;
+
+/**
+ * stream_t definition
+ */
+
+struct stream_t
+{
+    VLC_COMMON_MEMBERS
+    bool        b_error;
+
+    /* Module properties for stream filter */
+    module_t    *p_module;
+
+    char        *psz_access;
+    /* Real or virtual path (it can only be changed during stream_t opening) */
+    char        *psz_path;
+
+    /* Stream source for stream filter */
+    stream_t *p_source;
+
+    /* */
+    int      (*pf_read)   ( stream_t *, void *p_read, unsigned int i_read );
+    int      (*pf_peek)   ( stream_t *, const uint8_t **pp_peek, unsigned int i_peek );
+    int      (*pf_control)( stream_t *, int i_query, va_list );
+
+    /* */
+    void     (*pf_destroy)( stream_t *);
+
+    /* Private data for module */
+    stream_sys_t *p_sys;
+
+    /* Text reader state */
+    stream_text_t *p_text;
+
+    /* Weak link to parent input */
+    input_thread_t *p_input;
+};
+
+/**
+ * Possible commands to send to stream_Control() and stream_vaControl()
+ */
+enum stream_query_e
+{
+    /* capabilities */
+    STREAM_CAN_SEEK,            /**< arg1= bool *   res=cannot fail*/
+    STREAM_CAN_FASTSEEK,        /**< arg1= bool *   res=cannot fail*/
+    STREAM_CAN_PAUSE,           /**< arg1= bool *   res=cannot fail*/
+    STREAM_CAN_CONTROL_PACE,    /**< arg1= bool *   res=cannot fail*/
+
+    /* */
+    STREAM_SET_POSITION,        /**< arg1= uint64_t       res=can fail  */
+    STREAM_GET_POSITION,        /**< arg1= uint64_t *     res=cannot fail*/
+
+    STREAM_GET_SIZE,            /**< arg1= uint64_t *     res=cannot fail (0 if no sense)*/
+
+    /* You should update size of source if any and then update size 
+     * FIXME find a way to avoid it */
+    STREAM_UPDATE_SIZE,
+
+    /* */
+    STREAM_GET_PTS_DELAY = 0x101,/**< arg1= int64_t* res=cannot fail */
+    STREAM_GET_TITLE_INFO, /**< arg1=input_title_t*** arg2=int* res=can fail */
+    STREAM_GET_TITLE,       /**< arg1=unsigned * res=can fail */
+    STREAM_GET_SEEKPOINT,   /**< arg1=unsigned * res=can fail */
+    STREAM_GET_META,        /**< arg1= vlc_meta_t **       res=can fail */
+    STREAM_GET_CONTENT_TYPE,    /**< arg1= char **         res=can fail */
+    STREAM_GET_SIGNAL,      /**< arg1=double *pf_quality, arg2=double *pf_strength   res=can fail */
+
+    STREAM_SET_PAUSE_STATE = 0x200, /**< arg1= bool        res=can fail */
+    STREAM_SET_TITLE,       /**< arg1= int          res=can fail */
+    STREAM_SET_SEEKPOINT,   /**< arg1= int          res=can fail */
+
+    /* XXX only data read through stream_Read/Block will be recorded */
+    STREAM_SET_RECORD_STATE,     /**< arg1=bool, arg2=const char *psz_ext (if arg1 is true)  res=can fail */
+
+    STREAM_SET_PRIVATE_ID_STATE = 0x1000, /* arg1= int i_private_data, bool b_selected    res=can fail */
+    STREAM_SET_PRIVATE_ID_CA,             /* arg1= int i_program_number, uint16_t i_vpid, uint16_t i_apid1, uint16_t i_apid2, uint16_t i_apid3, uint8_t i_length, uint8_t *p_data */
+    STREAM_GET_PRIVATE_ID_STATE,          /* arg1=int i_private_data arg2=bool *          res=can fail */
+};
+
+VLC_API int stream_Read( stream_t *s, void *p_read, int i_read );
+VLC_API int stream_Peek( stream_t *s, const uint8_t **pp_peek, int i_peek );
+VLC_API int stream_vaControl( stream_t *s, int i_query, va_list args );
+VLC_API void stream_Delete( stream_t *s );
+VLC_API int stream_Control( stream_t *s, int i_query, ... );
+VLC_API block_t * stream_Block( stream_t *s, int i_size );
+VLC_API block_t * stream_BlockRemaining( stream_t *s, int i_max_size );
+VLC_API char * stream_ReadLine( stream_t * );
+
+/**
+ * Get the current position in a stream
+ */
+static inline int64_t stream_Tell( stream_t *s )
+{
+    uint64_t i_pos;
+    stream_Control( s, STREAM_GET_POSITION, &i_pos );
+    if( i_pos >> 62 )
+        return (int64_t)1 << 62;
+    return i_pos;
+}
+
+/**
+ * Get the size of the stream.
+ */
+static inline int64_t stream_Size( stream_t *s )
+{
+    uint64_t i_pos;
+    stream_Control( s, STREAM_GET_SIZE, &i_pos );
+    if( i_pos >> 62 )
+        return (int64_t)1 << 62;
+    return i_pos;
+}
+
+static inline int stream_Seek( stream_t *s, uint64_t i_pos )
+{
+    return stream_Control( s, STREAM_SET_POSITION, i_pos );
+}
+
+/**
+ * Get the Content-Type of a stream, or NULL if unknown.
+ * Result must be free()'d.
+ */
+static inline char *stream_ContentType( stream_t *s )
+{
+    char *res;
+    if( stream_Control( s, STREAM_GET_CONTENT_TYPE, &res ) )
+        return NULL;
+    return res;
+}
+
+/**
+ * Create a special stream and a demuxer, this allows chaining demuxers
+ * You must delete it using stream_Delete.
+ */
+VLC_API stream_t * stream_DemuxNew( demux_t *p_demux, const char *psz_demux, es_out_t *out );
+
+/**
+ * Send data to a stream handle created by stream_DemuxNew().
+ */
+VLC_API void stream_DemuxSend( stream_t *s, block_t *p_block );
+
+/**
+ * Perform a <b>demux</b> (i.e. DEMUX_...) control request on a stream handle
+ * created by stream_DemuxNew().
+ */
+VLC_API int stream_DemuxControlVa( stream_t *s, int, va_list );
+
+static inline int stream_DemuxControl( stream_t *s, int query, ... )
+{
+    va_list ap;
+    int ret;
+
+    va_start( ap, query );
+    ret = stream_DemuxControlVa( s, query, ap );
+    va_end( ap );
+    return ret;
+}
+
+/**
+ * Create a stream_t reading from memory.
+ * You must delete it using stream_Delete.
+ */
+VLC_API stream_t * stream_MemoryNew(vlc_object_t *p_obj, uint8_t *p_buffer, uint64_t i_size, bool b_preserve_memory );
+#define stream_MemoryNew( a, b, c, d ) stream_MemoryNew( VLC_OBJECT(a), b, c, d )
+
+/**
+ * Create a stream_t reading from a URL.
+ * You must delete it using stream_Delete.
+ */
+VLC_API stream_t * stream_UrlNew(vlc_object_t *p_this, const char *psz_url );
+#define stream_UrlNew( a, b ) stream_UrlNew( VLC_OBJECT(a), b )
+
+
+/**
+ * Try to add a stream filter to an open stream.
+ * @return New stream to use, or NULL if the filter could not be added.
+ **/
+VLC_API stream_t* stream_FilterNew( stream_t *p_source, const char *psz_stream_filter );
+/**
+ * @}
+ */
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif