* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
-#if !defined( __LIBVLC__ )
- #error You are not libvlc or one of its plugins. You cannot include this file
-#endif
+#ifndef VLC_BLOCK_H
+#define VLC_BLOCK_H 1
-#ifndef _VLC_BLOCK_H
-#define _VLC_BLOCK_H 1
+/**
+ * \file
+ * This file implements functions and structures to handle blocks of data in vlc
+ *
+ */
/****************************************************************************
* block:
#define BLOCK_FLAG_END_OF_FRAME 0x0040
/** This is not a key frame for bitrate shaping */
#define BLOCK_FLAG_NO_KEYFRAME 0x0080
+/** This block contains the last part of a sequence */
+#define BLOCK_FLAG_END_OF_SEQUENCE 0x0100
/** This block contains a clock reference */
#define BLOCK_FLAG_CLOCK 0x0200
/** This block is scrambled */
/** This block is corrupted and/or there is data loss */
#define BLOCK_FLAG_CORRUPTED 0x1000
+#define BLOCK_FLAG_TYPE_MASK \
+ (BLOCK_FLAG_TYPE_I|BLOCK_FLAG_TYPE_P|BLOCK_FLAG_TYPE_B|BLOCK_FLAG_TYPE_PB)
+
#define BLOCK_FLAG_PRIVATE_MASK 0xffff0000
#define BLOCK_FLAG_PRIVATE_SHIFT 16
/****************************************************************************
* Blocks functions:
****************************************************************************
- * - block_New : create a new block with the requested size ( >= 0 ), return
+ * - block_Alloc : create a new block with the requested size ( >= 0 ), return
* NULL for failure.
- * - block_Release : release a block allocated with block_New.
+ * - block_Release : release a block allocated with block_Alloc.
* - block_Realloc : realloc a block,
* i_pre: how many bytes to insert before body if > 0, else how many
* bytes of body to skip (the latter can be done without using
* - block_Duplicate : create a copy of a block.
****************************************************************************/
VLC_EXPORT( void, block_Init, ( block_t *, void *, size_t ) );
-VLC_EXPORT( block_t *, block_Alloc, ( size_t ) );
-VLC_EXPORT( block_t *, block_Realloc, ( block_t *, ssize_t i_pre, size_t i_body ) );
+VLC_EXPORT( block_t *, block_Alloc, ( size_t ) LIBVLC_USED );
+VLC_EXPORT( block_t *, block_Realloc, ( block_t *, ssize_t i_pre, size_t i_body ) LIBVLC_USED );
-static inline block_t *block_New( void *dummy, size_t size )
-{
- (void)dummy;
- return block_Alloc (size);
-}
+#define block_New( dummy, size ) block_Alloc(size)
+LIBVLC_USED
static inline block_t *block_Duplicate( block_t *p_block )
{
- block_t *p_dup = block_New( NULL, p_block->i_buffer );
+ block_t *p_dup = block_Alloc( p_block->i_buffer );
if( p_dup == NULL )
return NULL;
return p_dup;
}
+
static inline void block_Release( block_t *p_block )
{
p_block->pf_release( p_block );
}
-/**
- * Creates a block from a virtual address memory mapping (mmap).
- * This is provided by LibVLC so that mmap blocks can safely be deallocated
- * even after the allocating plugin has been unloaded from memory.
- *
- * @param addr base address of the mapping (as returned by mmap)
- * @param length length (bytes) of the mapping (as passed to mmap)
- * @return NULL if addr is MAP_FAILED, or an error occurred (in the later
- * case, munmap(addr, length) is invoked before returning).
- */
-VLC_EXPORT( block_t *, block_mmap_Alloc, (void *addr, size_t length) );
+VLC_EXPORT( block_t *, block_mmap_Alloc, (void *addr, size_t length) LIBVLC_USED );
+VLC_EXPORT( block_t *, block_File, (int fd) LIBVLC_USED );
+
+static inline void block_Cleanup (void *block)
+{
+ block_Release ((block_t *)block);
+}
+#define block_cleanup_push( block ) vlc_cleanup_push (block_Cleanup, block)
/****************************************************************************
* Chains of blocks functions helper
****************************************************************************
- * - block_ChainAppend : append a block the the last block of a chain. Try to
+ * - block_ChainAppend : append a block to the last block of a chain. Try to
* avoid using with a lot of data as it's really slow, prefer
* block_ChainLastAppend
* - block_ChainLastAppend : use a pointer over a pointer to the next blocks,
* and update it.
* - block_ChainRelease : release a chain of block
* - block_ChainExtract : extract data from a chain, return real bytes counts
- * - block_ChainGather : gather a chain, free it and return a block.
+ * - block_ChainGather : gather a chain, free it and return one block.
****************************************************************************/
static inline void block_ChainAppend( block_t **pp_list, block_t *p_block )
{
}
}
-static inline void block_ChainLastAppend( block_t ***ppp_last, block_t *p_block )
+static inline void block_ChainLastAppend( block_t ***ppp_last, block_t *p_block )
{
block_t *p_last = p_block;
return i_total;
}
+static inline void block_ChainProperties( block_t *p_list, int *pi_count, size_t *pi_size, mtime_t *pi_length )
+{
+ size_t i_size = 0;
+ mtime_t i_length = 0;
+ int i_count;
+
+ while( p_list )
+ {
+ i_size += p_list->i_buffer;
+ i_length += p_list->i_length;
+ i_count++;
+
+ p_list = p_list->p_next;
+ }
+
+ if( pi_size )
+ *pi_size = i_size;
+ if( pi_length )
+ *pi_length = i_length;
+ if( pi_count )
+ *pi_count = i_count;
+}
+
static inline block_t *block_ChainGather( block_t *p_list )
{
size_t i_total = 0;
mtime_t i_length = 0;
- block_t *b, *g;
+ block_t *g;
if( p_list->p_next == NULL )
return p_list; /* Already gathered */
- for( b = p_list; b != NULL; b = b->p_next )
- {
- i_total += b->i_buffer;
- i_length += b->i_length;
- }
+ block_ChainProperties( p_list, NULL, &i_total, &i_length );
- g = block_New( NULL, i_total );
+ g = block_Alloc( i_total );
block_ChainExtract( p_list, g->p_buffer, g->i_buffer );
g->i_flags = p_list->i_flags;
return g;
}
-
/****************************************************************************
* Fifos of blocks.
****************************************************************************
* - block_FifoSize : how many cumulated bytes are waiting in the fifo
* - block_FifoWake : wake ups a thread with block_FifoGet() = NULL
* (this is used to wakeup a thread when there is no data to queue)
+ *
+ * block_FifoGet and block_FifoShow are cancellation points.
****************************************************************************/
-#define block_FifoNew( a ) __block_FifoNew( VLC_OBJECT(a) )
-VLC_EXPORT( block_fifo_t *, __block_FifoNew, ( vlc_object_t * ) );
+VLC_EXPORT( block_fifo_t *, block_FifoNew, ( void ) LIBVLC_USED );
VLC_EXPORT( void, block_FifoRelease, ( block_fifo_t * ) );
VLC_EXPORT( void, block_FifoEmpty, ( block_fifo_t * ) );
VLC_EXPORT( size_t, block_FifoPut, ( block_fifo_t *, block_t * ) );
VLC_EXPORT( void, block_FifoWake, ( block_fifo_t * ) );
-VLC_EXPORT( block_t *, block_FifoGet, ( block_fifo_t * ) );
+VLC_EXPORT( block_t *, block_FifoGet, ( block_fifo_t * ) LIBVLC_USED );
VLC_EXPORT( block_t *, block_FifoShow, ( block_fifo_t * ) );
-VLC_EXPORT( size_t, block_FifoSize, ( const block_fifo_t *p_fifo ) );
-VLC_EXPORT( size_t, block_FifoCount, ( const block_fifo_t *p_fifo ) );
+VLC_EXPORT( size_t, block_FifoSize, ( const block_fifo_t *p_fifo ) LIBVLC_USED );
+VLC_EXPORT( size_t, block_FifoCount, ( const block_fifo_t *p_fifo ) LIBVLC_USED );
#endif /* VLC_BLOCK_H */
projects / vlc / blobdiff