/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2000 Wim Taymans * 2002 Thomas Vander Stichele * * gstutils.h: Header for various utility functions * * 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. */ #ifndef __GST_UTILS_H__ #define __GST_UTILS_H__ #include #include #include G_BEGIN_DECLS void gst_util_set_value_from_string (GValue *value, const gchar *value_str); void gst_util_set_object_arg (GObject *object, const gchar *name, const gchar *value); void gst_util_dump_mem (const guchar *mem, guint size); guint64 gst_util_gdouble_to_guint64 (gdouble value) G_GNUC_CONST; gdouble gst_util_guint64_to_gdouble (guint64 value) G_GNUC_CONST; /** * gst_guint64_to_gdouble: * @value: the #guint64 value to convert * * Convert @value to a gdouble. * * Returns: @value converted to a #gdouble. */ /** * gst_gdouble_to_guint64: * @value: the #gdouble value to convert * * Convert @value to a guint64. * * Returns: @value converted to a #guint64. */ #ifdef WIN32 #define gst_gdouble_to_guint64(value) gst_util_gdouble_to_guint64(value) #define gst_guint64_to_gdouble(value) gst_util_guint64_to_gdouble(value) #else #define gst_gdouble_to_guint64(value) ((guint64) (value)) #define gst_guint64_to_gdouble(value) ((gdouble) (value)) #endif guint64 gst_util_uint64_scale (guint64 val, guint64 num, guint64 denom); guint64 gst_util_uint64_scale_round (guint64 val, guint64 num, guint64 denom); guint64 gst_util_uint64_scale_ceil (guint64 val, guint64 num, guint64 denom); guint64 gst_util_uint64_scale_int (guint64 val, gint num, gint denom); guint64 gst_util_uint64_scale_int_round (guint64 val, gint num, gint denom); guint64 gst_util_uint64_scale_int_ceil (guint64 val, gint num, gint denom); guint32 gst_util_seqnum_next (void); gint32 gst_util_seqnum_compare (guint32 s1, guint32 s2); void gst_print_pad_caps (GString *buf, gint indent, GstPad *pad); void gst_print_element_args (GString *buf, gint indent, GstElement *element); GType gst_type_register_static_full (GType parent_type, const gchar *type_name, guint class_size, GBaseInitFunc base_init, GBaseFinalizeFunc base_finalize, GClassInitFunc class_init, GClassFinalizeFunc class_finalize, gconstpointer class_data, guint instance_size, guint16 n_preallocs, GInstanceInitFunc instance_init, const GTypeValueTable *value_table, GTypeFlags flags); /** * GST_CALL_PARENT: * @parent_class_cast: the name of the class cast macro for the parent type * @name: name of the function to call * @args: arguments enclosed in '( )' * * Just call the parent handler. This assumes that there is a variable * named parent_class that points to the (duh!) parent class. Note that * this macro is not to be used with things that return something, use * the _WITH_DEFAULT version for that */ #define GST_CALL_PARENT(parent_class_cast, name, args) \ ((parent_class_cast(parent_class)->name != NULL) ? \ parent_class_cast(parent_class)->name args : (void) 0) /** * GST_CALL_PARENT_WITH_DEFAULT: * @parent_class_cast: the name of the class cast macro for the parent type * @name: name of the function to call * @args: arguments enclosed in '( )' * @def_return: default result * * Same as GST_CALL_PARENT(), but in case there is no implementation, it * evaluates to @def_return. */ #define GST_CALL_PARENT_WITH_DEFAULT(parent_class_cast, name, args, def_return)\ ((parent_class_cast(parent_class)->name != NULL) ? \ parent_class_cast(parent_class)->name args : def_return) /* Define PUT and GET functions for unaligned memory */ #define _GST_GET(__data, __idx, __size, __shift) \ (((guint##__size) (((const guint8 *) (__data))[__idx])) << (__shift)) #define _GST_PUT(__data, __idx, __size, __shift, __num) \ (((guint8 *) (__data))[__idx] = (((guint##__size) (__num)) >> (__shift)) & 0xff) /** * GST_READ_UINT64_BE: * @data: memory location * * Read a 64 bit unsigned integer value in big endian format from the memory buffer. */ #define GST_READ_UINT64_BE(data) (_GST_GET (data, 0, 64, 56) | \ _GST_GET (data, 1, 64, 48) | \ _GST_GET (data, 2, 64, 40) | \ _GST_GET (data, 3, 64, 32) | \ _GST_GET (data, 4, 64, 24) | \ _GST_GET (data, 5, 64, 16) | \ _GST_GET (data, 6, 64, 8) | \ _GST_GET (data, 7, 64, 0)) /** * GST_READ_UINT64_LE: * @data: memory location * * Read a 64 bit unsigned integer value in little endian format from the memory buffer. */ #define GST_READ_UINT64_LE(data) (_GST_GET (data, 7, 64, 56) | \ _GST_GET (data, 6, 64, 48) | \ _GST_GET (data, 5, 64, 40) | \ _GST_GET (data, 4, 64, 32) | \ _GST_GET (data, 3, 64, 24) | \ _GST_GET (data, 2, 64, 16) | \ _GST_GET (data, 1, 64, 8) | \ _GST_GET (data, 0, 64, 0)) /** * GST_READ_UINT32_BE: * @data: memory location * * Read a 32 bit unsigned integer value in big endian format from the memory buffer. */ #define GST_READ_UINT32_BE(data) (_GST_GET (data, 0, 32, 24) | \ _GST_GET (data, 1, 32, 16) | \ _GST_GET (data, 2, 32, 8) | \ _GST_GET (data, 3, 32, 0)) /** * GST_READ_UINT32_LE: * @data: memory location * * Read a 32 bit unsigned integer value in little endian format from the memory buffer. */ #define GST_READ_UINT32_LE(data) (_GST_GET (data, 3, 32, 24) | \ _GST_GET (data, 2, 32, 16) | \ _GST_GET (data, 1, 32, 8) | \ _GST_GET (data, 0, 32, 0)) /** * GST_READ_UINT24_BE: * @data: memory location * * Read a 24 bit unsigned integer value in big endian format from the memory buffer. * * Since: 0.10.22 */ #define GST_READ_UINT24_BE(data) (_GST_GET (data, 0, 32, 16) | \ _GST_GET (data, 1, 32, 8) | \ _GST_GET (data, 2, 32, 0)) /** * GST_READ_UINT24_LE: * @data: memory location * * Read a 24 bit unsigned integer value in little endian format from the memory buffer. * * Since: 0.10.22 */ #define GST_READ_UINT24_LE(data) (_GST_GET (data, 2, 32, 16) | \ _GST_GET (data, 1, 32, 8) | \ _GST_GET (data, 0, 32, 0)) /** * GST_READ_UINT16_BE: * @data: memory location * * Read a 16 bit unsigned integer value in big endian format from the memory buffer. */ #define GST_READ_UINT16_BE(data) (_GST_GET (data, 0, 16, 8) | \ _GST_GET (data, 1, 16, 0)) /** * GST_READ_UINT16_LE: * @data: memory location * * Read a 16 bit unsigned integer value in little endian format from the memory buffer. */ #define GST_READ_UINT16_LE(data) (_GST_GET (data, 1, 16, 8) | \ _GST_GET (data, 0, 16, 0)) /** * GST_READ_UINT8: * @data: memory location * * Read an 8 bit unsigned integer value from the memory buffer. */ #define GST_READ_UINT8(data) (_GST_GET (data, 0, 8, 0)) /** * GST_WRITE_UINT64_BE: * @data: memory location * @num: value to store * * Store a 64 bit unsigned integer value in big endian format into the memory buffer. */ #define GST_WRITE_UINT64_BE(data, num) do { \ _GST_PUT (data, 0, 64, 56, num); \ _GST_PUT (data, 1, 64, 48, num); \ _GST_PUT (data, 2, 64, 40, num); \ _GST_PUT (data, 3, 64, 32, num); \ _GST_PUT (data, 4, 64, 24, num); \ _GST_PUT (data, 5, 64, 16, num); \ _GST_PUT (data, 6, 64, 8, num); \ _GST_PUT (data, 7, 64, 0, num); \ } while (0) /** * GST_WRITE_UINT64_LE: * @data: memory location * @num: value to store * * Store a 64 bit unsigned integer value in little endian format into the memory buffer. */ #define GST_WRITE_UINT64_LE(data, num) do { \ _GST_PUT (data, 0, 64, 0, num); \ _GST_PUT (data, 1, 64, 8, num); \ _GST_PUT (data, 2, 64, 16, num); \ _GST_PUT (data, 3, 64, 24, num); \ _GST_PUT (data, 4, 64, 32, num); \ _GST_PUT (data, 5, 64, 40, num); \ _GST_PUT (data, 6, 64, 48, num); \ _GST_PUT (data, 7, 64, 56, num); \ } while (0) /** * GST_WRITE_UINT32_BE: * @data: memory location * @num: value to store * * Store a 32 bit unsigned integer value in big endian format into the memory buffer. */ #define GST_WRITE_UINT32_BE(data, num) do { \ _GST_PUT (data, 0, 32, 24, num); \ _GST_PUT (data, 1, 32, 16, num); \ _GST_PUT (data, 2, 32, 8, num); \ _GST_PUT (data, 3, 32, 0, num); \ } while (0) /** * GST_WRITE_UINT32_LE: * @data: memory location * @num: value to store * * Store a 32 bit unsigned integer value in little endian format into the memory buffer. */ #define GST_WRITE_UINT32_LE(data, num) do { \ _GST_PUT (data, 0, 32, 0, num); \ _GST_PUT (data, 1, 32, 8, num); \ _GST_PUT (data, 2, 32, 16, num); \ _GST_PUT (data, 3, 32, 24, num); \ } while (0) /** * GST_WRITE_UINT24_BE: * @data: memory location * @num: value to store * * Store a 24 bit unsigned integer value in big endian format into the memory buffer. * * Since: 0.10.22 */ #define GST_WRITE_UINT24_BE(data, num) do { \ _GST_PUT (data, 0, 32, 16, num); \ _GST_PUT (data, 1, 32, 8, num); \ _GST_PUT (data, 2, 32, 0, num); \ } while (0) /** * GST_WRITE_UINT24_LE: * @data: memory location * @num: value to store * * Store a 24 bit unsigned integer value in little endian format into the memory buffer. * * Since: 0.10.22 */ #define GST_WRITE_UINT24_LE(data, num) do { \ _GST_PUT (data, 0, 32, 0, num); \ _GST_PUT (data, 1, 32, 8, num); \ _GST_PUT (data, 2, 32, 16, num); \ } while (0) /** * GST_WRITE_UINT16_BE: * @data: memory location * @num: value to store * * Store a 16 bit unsigned integer value in big endian format into the memory buffer. */ #define GST_WRITE_UINT16_BE(data, num) do { \ _GST_PUT (data, 0, 16, 8, num); \ _GST_PUT (data, 1, 16, 0, num); \ } while (0) /** * GST_WRITE_UINT16_LE: * @data: memory location * @num: value to store * * Store a 16 bit unsigned integer value in little endian format into the memory buffer. */ #define GST_WRITE_UINT16_LE(data, num) do { \ _GST_PUT (data, 0, 16, 0, num); \ _GST_PUT (data, 1, 16, 8, num); \ } while (0) /** * GST_WRITE_UINT8: * @data: memory location * @num: value to store * * Store an 8 bit unsigned integer value into the memory buffer. */ #define GST_WRITE_UINT8(data, num) do { \ _GST_PUT (data, 0, 8, 0, num); \ } while (0) /* Float endianness conversion macros */ /* FIXME: Remove this once we depend on a GLib version with this */ #ifndef GFLOAT_FROM_LE /** * GFLOAT_SWAP_LE_BE: * @in: input value * * Swap byte order of a 32-bit floating point value (float). * * Returns: @in byte-swapped. * * Since: 0.10.22 * */ #ifdef _FOOL_GTK_DOC_ G_INLINE_FUNC gfloat GFLOAT_SWAP_LE_BE (gfloat in); #endif inline static gfloat GFLOAT_SWAP_LE_BE(gfloat in) { union { guint32 i; gfloat f; } u; u.f = in; u.i = GUINT32_SWAP_LE_BE (u.i); return u.f; } /** * GDOUBLE_SWAP_LE_BE: * @in: input value * * Swap byte order of a 64-bit floating point value (double). * * Returns: @in byte-swapped. * * Since: 0.10.22 * */ #ifdef _FOOL_GTK_DOC_ G_INLINE_FUNC gdouble GDOUBLE_SWAP_LE_BE (gdouble in); #endif inline static gdouble GDOUBLE_SWAP_LE_BE(gdouble in) { union { guint64 i; gdouble d; } u; u.d = in; u.i = GUINT64_SWAP_LE_BE (u.i); return u.d; } /** * GDOUBLE_TO_LE: * @val: value * * Convert 64-bit floating point value (double) from native byte order into * little endian byte order. * * Since: 0.10.22 * */ /** * GDOUBLE_TO_BE: * @val: value * * Convert 64-bit floating point value (double) from native byte order into * big endian byte order. * * Since: 0.10.22 * */ /** * GDOUBLE_FROM_LE: * @val: value * * Convert 64-bit floating point value (double) from little endian byte order * into native byte order. * * Since: 0.10.22 * */ /** * GDOUBLE_FROM_BE: * @val: value * * Convert 64-bit floating point value (double) from big endian byte order * into native byte order. * * Since: 0.10.22 * */ /** * GFLOAT_TO_LE: * @val: value * * Convert 32-bit floating point value (float) from native byte order into * little endian byte order. * * Since: 0.10.22 * */ /** * GFLOAT_TO_BE: * @val: value * * Convert 32-bit floating point value (float) from native byte order into * big endian byte order. * * Since: 0.10.22 * */ /** * GFLOAT_FROM_LE: * @val: value * * Convert 32-bit floating point value (float) from little endian byte order * into native byte order. * * Since: 0.10.22 * */ /** * GFLOAT_FROM_BE: * @val: value * * Convert 32-bit floating point value (float) from big endian byte order * into native byte order. * * Since: 0.10.22 * */ #if G_BYTE_ORDER == G_LITTLE_ENDIAN #define GFLOAT_TO_LE(val) ((gfloat) (val)) #define GFLOAT_TO_BE(val) (GFLOAT_SWAP_LE_BE (val)) #define GDOUBLE_TO_LE(val) ((gdouble) (val)) #define GDOUBLE_TO_BE(val) (GDOUBLE_SWAP_LE_BE (val)) #elif G_BYTE_ORDER == G_BIG_ENDIAN #define GFLOAT_TO_LE(val) (GFLOAT_SWAP_LE_BE (val)) #define GFLOAT_TO_BE(val) ((gfloat) (val)) #define GDOUBLE_TO_LE(val) (GDOUBLE_SWAP_LE_BE (val)) #define GDOUBLE_TO_BE(val) ((gdouble) (val)) #else /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */ #error unknown ENDIAN type #endif /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */ #define GFLOAT_FROM_LE(val) (GFLOAT_TO_LE (val)) #define GFLOAT_FROM_BE(val) (GFLOAT_TO_BE (val)) #define GDOUBLE_FROM_LE(val) (GDOUBLE_TO_LE (val)) #define GDOUBLE_FROM_BE(val) (GDOUBLE_TO_BE (val)) #endif /* !defined(GFLOAT_FROM_LE) */ /** * GST_READ_FLOAT_LE: * @data: memory location * * Read a 32 bit float value in little endian format from the memory buffer. * * Returns: The floating point value read from @data * * Since: 0.10.22 * */ #ifdef _FOOL_GTK_DOC_ G_INLINE_FUNC gfloat GST_READ_FLOAT_LE (const guint8 *data); #endif inline static gfloat GST_READ_FLOAT_LE(const guint8 *data) { union { guint32 i; gfloat f; } u; u.i = GST_READ_UINT32_LE (data); return u.f; } /** * GST_READ_FLOAT_BE: * @data: memory location * * Read a 32 bit float value in big endian format from the memory buffer. * * Returns: The floating point value read from @data * * Since: 0.10.22 * */ #ifdef _FOOL_GTK_DOC_ G_INLINE_FUNC gfloat GST_READ_FLOAT_BE (const guint8 *data); #endif inline static gfloat GST_READ_FLOAT_BE(const guint8 *data) { union { guint32 i; gfloat f; } u; u.i = GST_READ_UINT32_BE (data); return u.f; } /** * GST_READ_DOUBLE_LE: * @data: memory location * * Read a 64 bit double value in little endian format from the memory buffer. * * Returns: The double-precision floating point value read from @data * * Since: 0.10.22 * */ #ifdef _FOOL_GTK_DOC_ G_INLINE_FUNC gdouble GST_READ_DOUBLE_LE (const guint8 *data); #endif inline static gdouble GST_READ_DOUBLE_LE(const guint8 *data) { union { guint64 i; gdouble d; } u; u.i = GST_READ_UINT64_LE (data); return u.d; } /** * GST_READ_DOUBLE_BE: * @data: memory location * * Read a 64 bit double value in big endian format from the memory buffer. * * Returns: The double-precision floating point value read from @data * * Since: 0.10.22 * */ #ifdef _FOOL_GTK_DOC_ G_INLINE_FUNC gdouble GST_READ_DOUBLE_BE (const guint8 *data); #endif inline static gdouble GST_READ_DOUBLE_BE(const guint8 *data) { union { guint64 i; gdouble d; } u; u.i = GST_READ_UINT64_BE (data); return u.d; } /** * GST_WRITE_FLOAT_LE: * @data: memory location * @num: value to store * * Store a 32 bit float value in little endian format into the memory buffer. * * Since: 0.10.22 * */ #ifdef _FOOL_GTK_DOC_ G_INLINE_FUNC void GST_WRITE_FLOAT_LE (guint8 *data, gfloat num); #endif inline static void GST_WRITE_FLOAT_LE(guint8 *data, gfloat num) { union { guint32 i; gfloat f; } u; u.f = num; GST_WRITE_UINT32_LE (data, u.i); } /** * GST_WRITE_FLOAT_BE: * @data: memory location * @num: value to store * * Store a 32 bit float value in big endian format into the memory buffer. * * Since: 0.10.22 * */ #ifdef _FOOL_GTK_DOC_ G_INLINE_FUNC void GST_WRITE_FLOAT_BE (guint8 *data, gfloat num); #endif inline static void GST_WRITE_FLOAT_BE(guint8 *data, gfloat num) { union { guint32 i; gfloat f; } u; u.f = num; GST_WRITE_UINT32_BE (data, u.i); } /** * GST_WRITE_DOUBLE_LE: * @data: memory location * @num: value to store * * Store a 64 bit double value in little endian format into the memory buffer. * * Since: 0.10.22 * */ #ifdef _FOOL_GTK_DOC_ G_INLINE_FUNC void GST_WRITE_DOUBLE_LE (guint8 *data, gdouble num); #endif inline static void GST_WRITE_DOUBLE_LE(guint8 *data, gdouble num) { union { guint64 i; gdouble d; } u; u.d = num; GST_WRITE_UINT64_LE (data, u.i); } /** * GST_WRITE_DOUBLE_BE: * @data: memory location * @num: value to store * * Store a 64 bit double value in big endian format into the memory buffer. * * Since: 0.10.22 * */ #ifdef _FOOL_GTK_DOC_ G_INLINE_FUNC void GST_WRITE_DOUBLE_BE (guint8 *data, gdouble num); #endif inline static void GST_WRITE_DOUBLE_BE(guint8 *data, gdouble num) { union { guint64 i; gdouble d; } u; u.d = num; GST_WRITE_UINT64_BE (data, u.i); } /* Miscellaneous utility macros */ /** * GST_ROUND_UP_2: * @num: integer value to round up * * Rounds an integer value up to the next multiple of 2. */ #define GST_ROUND_UP_2(num) (((num)+1)&~1) /** * GST_ROUND_UP_4: * @num: integer value to round up * * Rounds an integer value up to the next multiple of 4. */ #define GST_ROUND_UP_4(num) (((num)+3)&~3) /** * GST_ROUND_UP_8: * @num: integer value to round up * * Rounds an integer value up to the next multiple of 8. */ #define GST_ROUND_UP_8(num) (((num)+7)&~7) /** * GST_ROUND_UP_16: * @num: integer value to round up * * Rounds an integer value up to the next multiple of 16. */ #define GST_ROUND_UP_16(num) (((num)+15)&~15) /** * GST_ROUND_UP_32: * @num: integer value to round up * * Rounds an integer value up to the next multiple of 32. */ #define GST_ROUND_UP_32(num) (((num)+31)&~31) /** * GST_ROUND_UP_64: * @num: integer value to round up * * Rounds an integer value up to the next multiple of 64. */ #define GST_ROUND_UP_64(num) (((num)+63)&~63) /** * GST_ROUND_DOWN_2: * @num: integer value to round down * * Rounds an integer value down to the next multiple of 2. * * Since: 0.10.12 */ #define GST_ROUND_DOWN_2(num) ((num)&(~1)) /** * GST_ROUND_DOWN_4: * @num: integer value to round down * * Rounds an integer value down to the next multiple of 4. * * Since: 0.10.12 */ #define GST_ROUND_DOWN_4(num) ((num)&(~3)) /** * GST_ROUND_DOWN_8: * @num: integer value to round down * * Rounds an integer value down to the next multiple of 8. * * Since: 0.10.12 */ #define GST_ROUND_DOWN_8(num) ((num)&(~7)) /** * GST_ROUND_DOWN_16: * @num: integer value to round down * * Rounds an integer value down to the next multiple of 16. * * Since: 0.10.12 */ #define GST_ROUND_DOWN_16(num) ((num)&(~15)) /** * GST_ROUND_DOWN_32: * @num: integer value to round down * * Rounds an integer value down to the next multiple of 32. * * Since: 0.10.12 */ #define GST_ROUND_DOWN_32(num) ((num)&(~31)) /** * GST_ROUND_DOWN_64: * @num: integer value to round down * * Rounds an integer value down to the next multiple of 64. * * Since: 0.10.12 */ #define GST_ROUND_DOWN_64(num) ((num)&(~63)) void gst_object_default_error (GstObject * source, const GError * error, const gchar * debug); /* element functions */ void gst_element_create_all_pads (GstElement *element); GstPad* gst_element_get_compatible_pad (GstElement *element, GstPad *pad, const GstCaps *caps); GstPadTemplate* gst_element_get_compatible_pad_template (GstElement *element, GstPadTemplate *compattempl); const gchar* gst_element_state_get_name (GstState state); const gchar * gst_element_state_change_return_get_name (GstStateChangeReturn state_ret); gboolean gst_element_link (GstElement *src, GstElement *dest); gboolean gst_element_link_many (GstElement *element_1, GstElement *element_2, ...) G_GNUC_NULL_TERMINATED; gboolean gst_element_link_filtered (GstElement * src, GstElement * dest, GstCaps *filter); void gst_element_unlink (GstElement *src, GstElement *dest); void gst_element_unlink_many (GstElement *element_1, GstElement *element_2, ...) G_GNUC_NULL_TERMINATED; gboolean gst_element_link_pads (GstElement *src, const gchar *srcpadname, GstElement *dest, const gchar *destpadname); gboolean gst_element_link_pads_full (GstElement *src, const gchar *srcpadname, GstElement *dest, const gchar *destpadname, GstPadLinkCheck flags); void gst_element_unlink_pads (GstElement *src, const gchar *srcpadname, GstElement *dest, const gchar *destpadname); gboolean gst_element_link_pads_filtered (GstElement * src, const gchar * srcpadname, GstElement * dest, const gchar * destpadname, GstCaps *filter); gboolean gst_element_seek_simple (GstElement *element, GstFormat format, GstSeekFlags seek_flags, gint64 seek_pos); /* util elementfactory functions */ gboolean gst_element_factory_can_sink_all_caps (GstElementFactory *factory, const GstCaps *caps); gboolean gst_element_factory_can_src_all_caps (GstElementFactory *factory, const GstCaps *caps); gboolean gst_element_factory_can_sink_any_caps (GstElementFactory *factory, const GstCaps *caps); gboolean gst_element_factory_can_src_any_caps (GstElementFactory *factory, const GstCaps *caps); /* util query functions */ gboolean gst_element_query_position (GstElement *element, GstFormat format, gint64 *cur); gboolean gst_element_query_duration (GstElement *element, GstFormat format, gint64 *duration); gboolean gst_element_query_convert (GstElement *element, GstFormat src_format, gint64 src_val, GstFormat dest_format, gint64 *dest_val); /* element class functions */ void gst_element_class_install_std_props (GstElementClass * klass, const gchar * first_name, ...) G_GNUC_NULL_TERMINATED; /* pad functions */ void gst_pad_use_fixed_caps (GstPad *pad); GstCaps* gst_pad_proxy_getcaps (GstPad * pad, GstCaps * filter); GstElement* gst_pad_get_parent_element (GstPad *pad); /* util query functions */ gboolean gst_pad_query_position (GstPad *pad, GstFormat format, gint64 *cur); gboolean gst_pad_query_duration (GstPad *pad, GstFormat format, gint64 *duration); gboolean gst_pad_query_convert (GstPad *pad, GstFormat src_format, gint64 src_val, GstFormat dest_format, gint64 *dest_val); gboolean gst_pad_query_peer_position (GstPad *pad, GstFormat format, gint64 *cur); gboolean gst_pad_query_peer_duration (GstPad *pad, GstFormat format, gint64 *duration); gboolean gst_pad_query_peer_convert (GstPad *pad, GstFormat src_format, gint64 src_val, GstFormat dest_format, gint64 *dest_val); /* bin functions */ void gst_bin_add_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED; void gst_bin_remove_many (GstBin *bin, GstElement *element_1, ...) G_GNUC_NULL_TERMINATED; GstPad * gst_bin_find_unlinked_pad (GstBin *bin, GstPadDirection direction); /* buffer functions */ GstBuffer * gst_buffer_merge (GstBuffer * buf1, GstBuffer * buf2); GstBuffer * gst_buffer_join (GstBuffer * buf1, GstBuffer * buf2); /* tag emission utility functions */ void gst_element_found_tags_for_pad (GstElement * element, GstPad * pad, GstTagList * list); void gst_element_found_tags (GstElement * element, GstTagList * list); /* parse utility functions */ GstElement * gst_parse_bin_from_description (const gchar * bin_description, gboolean ghost_unlinked_pads, GError ** err); GstElement * gst_parse_bin_from_description_full (const gchar * bin_description, gboolean ghost_unlinked_pads, GstParseContext * context, GstParseFlags flags, GError ** err); GstClockTime gst_util_get_timestamp (void); /** * GstSearchMode: * @GST_SEARCH_MODE_EXACT : Only search for exact matches. * @GST_SEARCH_MODE_BEFORE: Search for an exact match or the element just before. * @GST_SEARCH_MODE_AFTER : Search for an exact match or the element just after. * * The different search modes. * * Since: 0.10.23 */ typedef enum { GST_SEARCH_MODE_EXACT = 0, GST_SEARCH_MODE_BEFORE, GST_SEARCH_MODE_AFTER } GstSearchMode; gpointer gst_util_array_binary_search (gpointer array, guint num_elements, gsize element_size, GCompareDataFunc search_func, GstSearchMode mode, gconstpointer search_data, gpointer user_data); gint gst_util_greatest_common_divisor (gint a, gint b); void gst_util_fraction_to_double (gint src_n, gint src_d, gdouble *dest); void gst_util_double_to_fraction (gdouble src, gint *dest_n, gint *dest_d); gboolean gst_util_fraction_multiply (gint a_n, gint a_d, gint b_n, gint b_d, gint *res_n, gint *res_d); gboolean gst_util_fraction_add (gint a_n, gint a_d, gint b_n, gint b_d, gint *res_n, gint *res_d); gint gst_util_fraction_compare (gint a_n, gint a_d, gint b_n, gint b_d); G_END_DECLS #endif /* __GST_UTILS_H__ */