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213 lines
6.0 KiB
213 lines
6.0 KiB
/*
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* tcmodule-info.h -- module data (capabilities) and helper functions.
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* (C) 2005-2010 - Francesco Romani <fromani -at- gmail -dot- com>
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*
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* This file is part of transcode, a video stream processing tool.
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*
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* transcode is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* transcode is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TCMODULEINFO_H
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#define TCMODULEINFO_H
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdint.h>
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#include "tccodecs.h"
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#include "tcformats.h"
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/* FIXME: move to a enum? */
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/* actions */
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#define TC_MODULE_FEATURE_NONE 0x00000000
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#define TC_MODULE_FEATURE_FILTER 0x00000001
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#define TC_MODULE_FEATURE_DECODE 0x00000002
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#define TC_MODULE_FEATURE_ENCODE 0x00000004
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#define TC_MODULE_FEATURE_DEMULTIPLEX 0x00000020
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#define TC_MODULE_FEATURE_MULTIPLEX 0x00000040
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/* targets */
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#define TC_MODULE_FEATURE_VIDEO 0x00010000
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#define TC_MODULE_FEATURE_AUDIO 0x00020000
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#define TC_MODULE_FEATURE_EXTRA 0x00040000
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#define TC_MODULE_FLAG_NONE 0x00000000
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#define TC_MODULE_FLAG_RECONFIGURABLE 0x00000001
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/* module can be reconfigured multiple times */
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#define TC_MODULE_FLAG_DELAY 0x00000002
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/* module require more than one input frame to work */
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#define TC_MODULE_FLAG_BUFFERING 0x00000004
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/* module require extra internal buffering
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* (XXX: this flag will hopefully vanish soon) */
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#define TC_MODULE_FLAG_CONVERSION 0x00000010
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/* module requires an unavoidable csp conversion)
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* (XXX: this flag will hopefully vanish soon) */
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/*
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* this structure will hold all the interesting informations
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* both for user and for transcode itself of a given module.
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*/
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typedef struct tcmoduleinfo_ TCModuleInfo;
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struct tcmoduleinfo_ {
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uint32_t features; /* what this module can do? */
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uint32_t flags; /* quirks */
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const char *name;
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const char *version;
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const char *description;
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/*
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* the following two MUST point to an array of TC_CODEC_*
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* terminated by a TC_CODEC_ERROR value
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*/
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const TCCodecID *codecs_in;
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const TCCodecID *codecs_out;
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/*
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* the following two MUST point to an array of TC_FORMAT_*
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* terminated by a TC_FORMAT_ERROR value
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*/
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const TCFormatID *formats_in;
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const TCFormatID *formats_out;
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};
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/*
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* tc_module_info_match:
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* scan the given informations about two modules, and tell if the
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* two modules can be chained together using the given codec.
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*
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* Parameters:
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* tc_codec:
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* codec_id to be used.
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* head:
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* the first given module information structure;
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* 'head' output is supposed to fit in 'tail' input.
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* tail:
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* the second given module information structure;
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* tail' input is supposed to be given by 'head' output.
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*
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* Return value:
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* 1 if 'head' can feed 'tail' safely,
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* 0 otherwise
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*
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* Side effects:
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* none
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*
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* Preconditions:
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* none
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*
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* Postconditions:
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* none
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*/
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int tc_module_info_match(int tc_codec,
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const TCModuleInfo *head,
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const TCModuleInfo *tail);
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/*
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* tc_module_info_log:
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* pretty-print the content of a given module information structure
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* using functions of tc_log_*() family.
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*
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* Parameters:
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* info:
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* module information structure to dump
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* verbose:
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* level of detail of description, ranging to TC_QUIET to TC_STATS.
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* Other values will be ignored
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*
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* Return value:
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* none
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*
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* Side effects:
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* some informations are printed using tc_log_*()
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*
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* Preconditions:
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* 'verbose' must be in range TC_QUIET ... TC_STATS
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*
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* Postconditions:
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* none
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*/
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void tc_module_info_log(const TCModuleInfo *info, int verbose);
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/*
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* tc_module_info_copy:
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* create an exact copy of 'src' in 'dst', allocating new fields.
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* PLEASE NOTE: this is an 'hard' (real) copy, which makes two
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* TCModuleInfo identical but indipendent.
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* For a 'soft' (reference) copy, just memcpy() the two structures.
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*
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* Parameters:
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* src: TCModuleInfo structure to be copied
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* dst: pointer to structure that will hold the copy.
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*
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* Return value:
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* 0 successfull
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* -1 given (at least) a bad TCModuleInfo reference
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* 1 not enough memory to perform a full copy
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*
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* Side effects:
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* memory in 'dst' is allocated, usinc tc_* helpers, to hold data
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* provided by 'src'.
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*
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* Preconditions:
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* 'src' and 'dst' must point to valid TCModuleInfo structures.
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*
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* Postconditions:
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* 'dst' is an exact copy of 'src'.
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*/
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int tc_module_info_copy(const TCModuleInfo *src, TCModuleInfo *dst);
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/*
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* tc_module_info_free:
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* free all resources (memory) acquired when copying a TCModuleInfo
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* structure into another one.
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*
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* Parameters:
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* info: structure copied to be freed
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*
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* Return value:
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* none
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*
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* Side effects:
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* none
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*
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* Preconditions:
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* 'info' must be obtained as result of 'tc_module_info_copy' function,
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* as 'dst' parameter. Applying this function to a structure obtained
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* in a different way will cause an undefined behaviour, most likely
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* a memory corruption or a crash
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*
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* Postconditions:
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* all resources (memory) acquired by 'info' are released.
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*
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*/
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void tc_module_info_free(TCModuleInfo *info);
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/*************************************************************************/
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#endif /* TCMODULEINFO_H */
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/*
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* Local variables:
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* c-file-style: "stroustrup"
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* c-file-offsets: ((case-label . *) (statement-case-intro . *))
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* indent-tabs-mode: nil
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* End:
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*
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* vim: expandtab shiftwidth=4:
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*/
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