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/*
* tcmoduleinfo.c -- module informations (capabilities) and helper functions.
* (C) 2005-2010 - Francesco Romani <fromani -at- gmail -dot- com>
*
* This file is part of transcode, a video stream processing tool.
*
* transcode is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* transcode 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "libtc.h"
#include "tcmodule-info.h"
#include "transcode.h"
#include <string.h>
#define HAVE_FEATURE(info, feat) \
((info)->features & (TC_MODULE_FEATURE_ ## feat))
int tc_module_info_match(int tc_codec,
const TCModuleInfo *head, const TCModuleInfo *tail)
{
int found = 0;
int i = 0, j = 0;
/* we need a pair of valid references to go further */
if (head == NULL || tail == NULL) {
return 0;
}
/*
* a multiplexor module can be chained with nothing,
* it must be placed at the end of the chain; reversed
* for demulitplexor module.
*/
if (HAVE_FEATURE(head, MULTIPLEX) || HAVE_FEATURE(tail, DEMULTIPLEX)) {
return 0;
}
/* format kind compatibility check */
if ((HAVE_FEATURE(head, VIDEO) && !HAVE_FEATURE(tail, VIDEO))
|| (HAVE_FEATURE(head, AUDIO) && !HAVE_FEATURE(tail, AUDIO))) {
return 0;
}
/*
* we look only for the first compatible match, not for the best one.
* Yet.
*/
for (i = 0; !found && tail->codecs_in[i] != TC_CODEC_ERROR; i++) {
for (j = 0; !found && head->codecs_out[j] != TC_CODEC_ERROR; j++) {
/* trivial case: exact match */
if (tc_codec == head->codecs_out[j]
&& head->codecs_out[j] == tail->codecs_in[i]) {
/* triple fit */
found = 1;
}
if ((head->codecs_out[j] == tail->codecs_in[i]
|| head->codecs_out[j] == TC_CODEC_ANY)
&& TC_CODEC_ANY == tc_codec) {
found = 1;
}
if ((tc_codec == head->codecs_out[j]
|| tc_codec == TC_CODEC_ANY)
&& TC_CODEC_ANY == tail->codecs_in[i]) {
found = 1;
}
if ((tail->codecs_in[i] == tc_codec
|| tail->codecs_in[i] == TC_CODEC_ANY)
&& TC_CODEC_ANY == head->codecs_out[j]) {
found = 1;
}
}
}
return found;
}
#undef HAVE_FEATURE
static void codecs_to_string(const TCCodecID *codecs, char *buffer,
size_t bufsize, const char *fallback_string)
{
int found = 0;
int i = 0;
if (buffer == NULL || bufsize < TC_BUF_LINE) {
return;
}
buffer[0] = '\0';
for (i = 0; codecs[i] != TC_CODEC_ERROR; i++) {
const char *codec = tc_codec_to_string(codecs[i]);
if (codec != NULL) {
strlcat(buffer, codec, bufsize);
strlcat(buffer, " ", bufsize);
found = 1;
}
}
if (!found) {
strlcpy(buffer, fallback_string, bufsize);
}
}
void tc_module_info_log(const TCModuleInfo *info, int verbose)
{
char buffer[TC_BUF_LINE];
if (info == NULL) {
return;
}
if (info->name == NULL
|| (info->version == NULL || info->description == NULL)) {
tc_log_error(__FILE__, "missing critical information for module");
return;
}
if (verbose >= TC_STATS) {
tc_log_info(info->name, "description:\n%s", info->description);
}
if (verbose >= TC_DEBUG) {
if (info->features == TC_MODULE_FEATURE_NONE) {
strlcpy(buffer, "none (this shouldn't happen!", sizeof(buffer));
} else {
tc_snprintf(buffer, sizeof(buffer), "%s%s%s",
(info->features & TC_MODULE_FEATURE_VIDEO) ?"video " :"",
(info->features & TC_MODULE_FEATURE_AUDIO) ?"audio " :"",
(info->features & TC_MODULE_FEATURE_EXTRA) ?"extra" :"");
}
tc_log_info(info->name, "can handle : %s", buffer);
if (info->features == TC_MODULE_FEATURE_NONE) {
strlcpy(buffer, "nothing (this shouldn't happen!", sizeof(buffer));
} else {
tc_snprintf(buffer, sizeof(buffer), "%s%s%s",
(info->features & TC_MODULE_FEATURE_FILTER)
?"filtering " :"",
(info->features & TC_MODULE_FEATURE_ENCODE)
?"encoding " :"",
(info->features & TC_MODULE_FEATURE_MULTIPLEX)
?"multiplexing" :"");
}
tc_log_info(info->name, "can do : %s", buffer);
if (info->flags == TC_MODULE_FLAG_NONE) {
strlcpy(buffer, "none", sizeof(buffer));
} else {
tc_snprintf(buffer, sizeof(buffer), "%s%s%s%s",
(info->flags & TC_MODULE_FLAG_RECONFIGURABLE)
?"reconfigurable " :"",
(info->flags & TC_MODULE_FLAG_DELAY)
?"delay " :"",
(info->flags & TC_MODULE_FLAG_BUFFERING)
?"buffering " :"",
(info->flags & TC_MODULE_FLAG_CONVERSION)
?"conversion " :"");
}
tc_log_info(info->name, "flags : %s", buffer);
}
if (verbose >= TC_INFO) {
const char *str = (info->features & TC_MODULE_FEATURE_MULTIPLEX)
?"a media stream" :"nothing";
codecs_to_string(info->codecs_in, buffer, sizeof(buffer), str);
tc_log_info(info->name, "accepts : %s", buffer);
codecs_to_string(info->codecs_out, buffer, TC_BUF_LINE, str);
tc_log_info(info->name, "produces : %s", buffer);
}
}
void tc_module_info_free(TCModuleInfo *info)
{
if (info != NULL) {
/*
* void* casts to silence warning from gcc 4.x (free requires void*,
* argument is const something*
*/
tc_free((void*)info->name);
tc_free((void*)info->version);
tc_free((void*)info->description);
tc_free((void*)info->codecs_in);
tc_free((void*)info->codecs_out);
}
}
/*************************************************************************/
/*
* Local variables:
* c-file-style: "stroustrup"
* c-file-offsets: ((case-label . *) (statement-case-intro . *))
* indent-tabs-mode: nil
* End:
*
* vim: expandtab shiftwidth=4:
*/
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