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bufferpool: use GstStructure to configure the pool

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Use a GstStructure to provide the pool with the right configuration. Also
provide some helper methods to configure such a structure.
don't pass the config in alloc_buffer, pool implementation will already have
parsed it during set_config.
Update defs
This commit is contained in:
Wim Taymans 2011-02-17 16:46:51 +01:00
parent 8dbb10dac7
commit 0caa41e173
3 changed files with 141 additions and 54 deletions
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141
gst/gstbufferpool.c
View file

@ -38,6 +38,20 @@
#include "gstbufferpool.h"
#define GST_BUFFER_POOL_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BUFFER_POOL, GstBufferPoolPrivate))
struct _GstBufferPoolPrivate
{
guint min_buffers;
guint max_buffers;
guint size;
guint prefix;
guint postfix;
guint align;
};
enum
{
/* add more above */
@ -50,10 +64,9 @@ G_DEFINE_TYPE (GstBufferPool, gst_buffer_pool, GST_TYPE_OBJECT);
static void default_set_flushing (GstBufferPool * pool, gboolean flushing);
static gboolean default_set_config (GstBufferPool * pool,
GstBufferPoolConfig * config);
GstStructure * config);
static GstFlowReturn default_alloc_buffer (GstBufferPool * pool,
GstBuffer ** buffer, GstBufferPoolConfig * config,
GstBufferPoolParams * params);
GstBuffer ** buffer, GstBufferPoolParams * params);
static GstFlowReturn default_acquire_buffer (GstBufferPool * pool,
GstBuffer ** buffer, GstBufferPoolParams * params);
static void default_free_buffer (GstBufferPool * pool, GstBuffer * buffer);
@ -77,7 +90,14 @@ gst_buffer_pool_class_init (GstBufferPoolClass * klass)
static void
gst_buffer_pool_init (GstBufferPool * pool)
{
pool->config.align = 1;
pool->priv = GST_BUFFER_POOL_GET_PRIVATE (pool);
pool->config = gst_structure_new ("GstBufferPoolConfig",
"size", G_TYPE_UINT, 0,
"min-buffers", G_TYPE_UINT, 0,
"max-buffers", G_TYPE_UINT, 0,
"prefix", G_TYPE_UINT, 0,
"postfix", G_TYPE_UINT, 0, "align", G_TYPE_UINT, 1, NULL);
pool->poll = gst_poll_new_timer ();
pool->queue = gst_atomic_queue_new (10);
default_set_flushing (pool, TRUE);
@ -161,19 +181,24 @@ gst_buffer_pool_set_flushing (GstBufferPool * pool, gboolean flushing)
}
static gboolean
default_set_config (GstBufferPool * pool, GstBufferPoolConfig * config)
default_set_config (GstBufferPool * pool, GstStructure * config)
{
guint i;
GstBufferPoolClass *pclass;
GstBufferPoolPrivate *priv = pool->priv;
pclass = GST_BUFFER_POOL_GET_CLASS (pool);
/* parse the config and keep around */
gst_buffer_pool_config_get (config, &priv->size, &priv->min_buffers,
&priv->max_buffers, &priv->prefix, &priv->postfix, &priv->align);
/* we need to prealloc buffers */
for (i = config->min_buffers; i > 0; i--) {
for (i = priv->min_buffers; i > 0; i--) {
GstBuffer *buffer;
if (G_LIKELY (pclass->alloc_buffer)) {
if (!pclass->alloc_buffer (pool, &buffer, config, NULL))
if (!pclass->alloc_buffer (pool, &buffer, NULL))
return FALSE;
} else
return FALSE;
@ -189,15 +214,19 @@ default_set_config (GstBufferPool * pool, GstBufferPoolConfig * config)
/**
* gst_buffer_pool_set_config:
* @pool: a #GstBufferPool
* @config: a #GstBufferPoolConfig
* @config: a #GstStructure
*
* Set the configuration of the pool. The pool must be flushing or else this
* function will do nothing and return FALSE.
*
* @condfig is a #GstStructure that contains the configuration parameters for
* the pool. A default and mandatory set of parameters can be configured with
* gst_buffer_pool_config_set().
*
* Returns: TRUE when the configuration could be set.
*/
gboolean
gst_buffer_pool_set_config (GstBufferPool * pool, GstBufferPoolConfig * config)
gst_buffer_pool_set_config (GstBufferPool * pool, GstStructure * config)
{
gboolean result;
GstBufferPoolClass *pclass;
@ -216,8 +245,11 @@ gst_buffer_pool_set_config (GstBufferPool * pool, GstBufferPoolConfig * config)
else
result = FALSE;
if (result)
pool->config = *config;
if (result) {
if (pool->config)
gst_structure_free (pool->config);
pool->config = config;
}
return result;
}
@ -225,34 +257,92 @@ gst_buffer_pool_set_config (GstBufferPool * pool, GstBufferPoolConfig * config)
/**
* gst_buffer_pool_get_config:
* @pool: a #GstBufferPool
* @config: a #GstBufferPoolConfig
*
* Get the current configuration of the pool.
* Get the current configuration of the pool. This configuration is read-only,
* use gst_structure_copy() to make a writable copy.
*/
const GstStructure *
gst_buffer_pool_get_config (GstBufferPool * pool)
{
g_return_val_if_fail (GST_IS_BUFFER_POOL (pool), NULL);
return pool->config;
}
/**
* gst_buffer_pool_config_set:
* @pool: a #GstBufferPool
* @size: the size of each buffer, not including pre and post fix
* @min_buffers: the minimum amount of buffers to allocate.
* @max_buffers: the maximum amount of buffers to allocate or 0 for unlimited.
* @prefix: prefix each buffer with this many bytes
* @postfix: postfix each buffer with this many bytes
* @align: alignment of the buffer data.
*
* Configure @config with the given parameters.
*/
void
gst_buffer_pool_get_config (GstBufferPool * pool, GstBufferPoolConfig * config)
gst_buffer_pool_config_set (GstStructure * config, guint size,
guint min_buffers, guint max_buffers, guint prefix, guint postfix,
guint align)
{
*config = pool->config;
g_return_if_fail (config != NULL);
gst_structure_set (config,
"size", G_TYPE_UINT, size,
"min-buffers", G_TYPE_UINT, min_buffers,
"max-buffers", G_TYPE_UINT, max_buffers,
"prefix", G_TYPE_UINT, prefix,
"postfix", G_TYPE_UINT, postfix, "align", G_TYPE_UINT, align, NULL);
}
/**
* gst_buffer_pool_config_get:
* @pool: a #GstBufferPool
* @size: the size of each buffer, not including pre and post fix
* @min_buffers: the minimum amount of buffers to allocate.
* @max_buffers: the maximum amount of buffers to allocate or 0 for unlimited.
* @prefix: prefix each buffer with this many bytes
* @postfix: postfix each buffer with this many bytes
* @align: alignment of the buffer data.
*
* Get the configuration values from @config.
*/
gboolean
gst_buffer_pool_config_get (GstStructure * config, guint * size,
guint * min_buffers, guint * max_buffers, guint * prefix, guint * postfix,
guint * align)
{
g_return_val_if_fail (config != NULL, FALSE);
return gst_structure_get (config,
"size", G_TYPE_UINT, size,
"min-buffers", G_TYPE_UINT, min_buffers,
"max-buffers", G_TYPE_UINT, max_buffers,
"prefix", G_TYPE_UINT, prefix,
"postfix", G_TYPE_UINT, postfix, "align", G_TYPE_UINT, align, NULL);
}
static GstFlowReturn
default_alloc_buffer (GstBufferPool * pool, GstBuffer ** buffer,
GstBufferPoolConfig * config, GstBufferPoolParams * params)
GstBufferPoolParams * params)
{
guint size, align;
GstBufferPoolPrivate *priv = pool->priv;
*buffer = gst_buffer_new ();
align = config->align - 1;
size = config->prefix + config->postfix + config->size + align;
align = priv->align - 1;
size = priv->prefix + priv->postfix + priv->size + align;
if (size > 0) {
guint8 *memptr;
memptr = g_malloc (size);
GST_BUFFER_MALLOCDATA (*buffer) = memptr;
memptr = (guint8 *) ((guintptr) (memptr + align) & ~align);
GST_BUFFER_DATA (*buffer) = memptr + config->prefix;
GST_BUFFER_SIZE (*buffer) = config->size;
GST_BUFFER_DATA (*buffer) = memptr + priv->prefix;
GST_BUFFER_SIZE (*buffer) = priv->size;
}
return GST_FLOW_OK;
@ -264,6 +354,7 @@ default_acquire_buffer (GstBufferPool * pool, GstBuffer ** buffer,
{
GstFlowReturn result;
GstBufferPoolClass *pclass;
GstBufferPoolPrivate *priv = pool->priv;
pclass = GST_BUFFER_POOL_GET_CLASS (pool);
@ -281,10 +372,10 @@ default_acquire_buffer (GstBufferPool * pool, GstBuffer ** buffer,
}
/* no buffer */
if (pool->config.max_buffers == 0) {
if (priv->max_buffers == 0) {
/* no max_buffers, we allocate some more */
if (G_LIKELY (pclass->alloc_buffer))
result = pclass->alloc_buffer (pool, buffer, &pool->config, params);
result = pclass->alloc_buffer (pool, buffer, params);
else
result = GST_FLOW_NOT_SUPPORTED;
break;
@ -323,6 +414,9 @@ gst_buffer_pool_acquire_buffer (GstBufferPool * pool, GstBuffer ** buffer,
GstBufferPoolClass *pclass;
GstFlowReturn result;
g_return_val_if_fail (GST_IS_BUFFER_POOL (pool), GST_FLOW_ERROR);
g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
pclass = GST_BUFFER_POOL_GET_CLASS (pool);
if (G_LIKELY (pclass->acquire_buffer))
@ -369,6 +463,9 @@ gst_buffer_pool_release_buffer (GstBufferPool * pool, GstBuffer * buffer)
{
GstBufferPoolClass *pclass;
g_return_if_fail (GST_IS_BUFFER_POOL (pool));
g_return_if_fail (buffer != NULL);
pclass = GST_BUFFER_POOL_GET_CLASS (pool);
if (G_LIKELY (pclass->release_buffer))

52
gst/gstbufferpool.h
View file

@ -33,6 +33,7 @@
G_BEGIN_DECLS
typedef struct _GstBufferPool GstBufferPool;
typedef struct _GstBufferPoolPrivate GstBufferPoolPrivate;
typedef struct _GstBufferPoolClass GstBufferPoolClass;
/**
@ -84,28 +85,6 @@ typedef struct _GstBufferPoolParams {
GstBufferPoolFlags flags;
} GstBufferPoolParams;
/**
* GstBufferPoolAlloc:
* @min_buffers: the minimum amount of buffers to allocate.
* @max_buffers: the maximum amount of buffers to allocate or 0 for unlimited.
* @size: the size of each buffer, not including pre and post fix
* @prefix: prefix each buffer with this many bytes
* @postfix: postfix each buffer with this many bytes
* @align: alignment of the buffer data.
*
* Properties for controlling the allocation of buffers. Buffer memory will be
* allocated with the given alignment and the returned buffers will have their
* data pointer set to this memory + prefix.
*/
typedef struct _GstBufferPoolConfig {
guint min_buffers;
guint max_buffers;
guint size;
guint prefix;
guint postfix;
guint align;
} GstBufferPoolConfig;
/**
* GstBufferPool:
* @mini_object: the parent structure
@ -121,7 +100,9 @@ struct _GstBufferPool {
GstAtomicQueue *queue;
GstPoll *poll;
GstBufferPoolConfig config;
GstStructure *config;
GstBufferPoolPrivate *priv;
gpointer _gst_reserved[GST_PADDING];
};
@ -131,12 +112,11 @@ struct _GstBufferPoolClass {
/* vmethods */
void (*set_flushing) (GstBufferPool *pool, gboolean flushing);
gboolean (*set_config) (GstBufferPool *pool, GstBufferPoolConfig *config);
gboolean (*set_config) (GstBufferPool *pool, GstStructure *config);
GstFlowReturn (*acquire_buffer) (GstBufferPool *pool, GstBuffer **buffer,
GstBufferPoolParams *params);
GstFlowReturn (*alloc_buffer) (GstBufferPool *pool, GstBuffer **buffer,
GstBufferPoolConfig *config,
GstBufferPoolParams *params);
void (*release_buffer) (GstBufferPool *pool, GstBuffer *buffer);
void (*free_buffer) (GstBufferPool *pool, GstBuffer *buffer);
@ -147,18 +127,26 @@ struct _GstBufferPoolClass {
GType gst_buffer_pool_get_type (void);
/* allocation */
GstBufferPool * gst_buffer_pool_new (void);
GstBufferPool * gst_buffer_pool_new (void);
/* state management */
void gst_buffer_pool_set_flushing (GstBufferPool *pool, gboolean flushing);
void gst_buffer_pool_set_flushing (GstBufferPool *pool, gboolean flushing);
gboolean gst_buffer_pool_set_config (GstBufferPool *pool, GstBufferPoolConfig *config);
void gst_buffer_pool_get_config (GstBufferPool *pool, GstBufferPoolConfig *config);
gboolean gst_buffer_pool_set_config (GstBufferPool *pool, GstStructure *config);
const GstStructure * gst_buffer_pool_get_config (GstBufferPool *pool);
/* helpers for configuring the config structure */
void gst_buffer_pool_config_set (GstStructure *config, guint size,
guint min_buffers, guint max_buffers,
guint prefix, guint postfix, guint align);
gboolean gst_buffer_pool_config_get (GstStructure *config, guint *size,
guint *min_buffers, guint *max_buffers,
guint *prefix, guint *postfix, guint *align);
/* buffer management */
GstFlowReturn gst_buffer_pool_acquire_buffer (GstBufferPool *pool, GstBuffer **buffer, GstBufferPoolParams *params);
void gst_buffer_pool_release_buffer (GstBufferPool *pool, GstBuffer *buffer);
GstFlowReturn gst_buffer_pool_acquire_buffer (GstBufferPool *pool, GstBuffer **buffer,
GstBufferPoolParams *params);
void gst_buffer_pool_release_buffer (GstBufferPool *pool, GstBuffer *buffer);
G_END_DECLS

2
win32/common/libgstreamer.def
View file

@ -125,6 +125,8 @@ EXPORTS
gst_buffer_new_and_alloc
gst_buffer_remove_meta
gst_buffer_pool_acquire_buffer
gst_buffer_pool_config_get
gst_buffer_pool_config_set
gst_buffer_pool_flags_get_type
gst_buffer_pool_get_config
gst_buffer_pool_get_type