Merge avfiltergraphdesc.c in avfiltergraph.c
Commited in SoC by Vitor Sessak on 2008-03-24 20:46:50 Originally committed as revision 12735 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vitor Sessak
parent
f2ee8083c8
commit
5c2ff9fd46
@ -1,5 +1,6 @@
|
||||
/*
|
||||
* filter graphs
|
||||
* copyright (c) 2008 Vitor Sessak
|
||||
* copyright (c) 2007 Bobby Bingham
|
||||
*
|
||||
* This file is part of FFmpeg.
|
||||
@ -19,6 +20,9 @@
|
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#include <ctype.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "avfilter.h"
|
||||
#include "avfiltergraph.h"
|
||||
|
||||
@ -249,3 +253,337 @@ fail:
|
||||
uninit(graph);
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
static void consume_whitespace(const char **buf)
|
||||
{
|
||||
*buf += strspn(*buf, " \n\t");
|
||||
}
|
||||
|
||||
/**
|
||||
* get the next non-whitespace char
|
||||
*/
|
||||
static char consume_char(const char **buf)
|
||||
{
|
||||
char out;
|
||||
consume_whitespace(buf);
|
||||
|
||||
out = **buf;
|
||||
|
||||
if (out)
|
||||
(*buf)++;
|
||||
|
||||
return out;
|
||||
}
|
||||
|
||||
/**
|
||||
* remove the quotation marks from a string. Ex: "aaa'bb'cc" -> "aaabbcc"
|
||||
*/
|
||||
static void unquote(char *str)
|
||||
{
|
||||
char *p1, *p2;
|
||||
p1=p2=str;
|
||||
while (*p1 != 0) {
|
||||
if (*p1 != '\'')
|
||||
*p2++ = *p1;
|
||||
p1++;
|
||||
}
|
||||
|
||||
*p2 = 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Consumes a string from *buf.
|
||||
* @return a copy of the consumed string, which should be free'd after use
|
||||
*/
|
||||
static char *consume_string(const char **buf)
|
||||
{
|
||||
const char *start;
|
||||
char *ret;
|
||||
int size;
|
||||
|
||||
consume_whitespace(buf);
|
||||
|
||||
if (!(**buf))
|
||||
return av_mallocz(1);
|
||||
|
||||
start = *buf;
|
||||
|
||||
*buf += strcspn(*buf, " ()=,'");
|
||||
|
||||
if (**buf == '\'') {
|
||||
char *p = strchr(*buf + 1, '\'');
|
||||
if (p)
|
||||
*buf = p + 1;
|
||||
else
|
||||
*buf += strlen(*buf); // Move the pointer to the null end byte
|
||||
}
|
||||
|
||||
size = *buf - start + 1;
|
||||
ret = av_malloc(size);
|
||||
memcpy(ret, start, size - 1);
|
||||
ret[size-1] = 0;
|
||||
|
||||
unquote(ret);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* Parse "(linkname)"
|
||||
* @arg name a pointer (that need to be free'd after use) to the name between
|
||||
* parenthesis
|
||||
*/
|
||||
static void parse_link_name(const char **buf, char **name)
|
||||
{
|
||||
consume_char(buf);
|
||||
|
||||
*name = consume_string(buf);
|
||||
|
||||
if (!*name[0])
|
||||
goto fail;
|
||||
|
||||
if (consume_char(buf) != ')')
|
||||
goto fail;
|
||||
|
||||
return;
|
||||
fail:
|
||||
av_freep(name);
|
||||
av_log(&log_ctx, AV_LOG_ERROR, "Could not parse link name!\n");
|
||||
}
|
||||
|
||||
/**
|
||||
* Parse "filter=params"
|
||||
* @arg name a pointer (that need to be free'd after use) to the name of the
|
||||
* filter
|
||||
* @arg ars a pointer (that need to be free'd after use) to the args of the
|
||||
* filter
|
||||
*/
|
||||
static void parse_filter(const char **buf, char **name, char **opts)
|
||||
{
|
||||
*name = consume_string(buf);
|
||||
|
||||
if (**buf == '=') {
|
||||
consume_char(buf);
|
||||
*opts = consume_string(buf);
|
||||
} else {
|
||||
*opts = NULL;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
enum LinkType {
|
||||
LinkTypeIn,
|
||||
LinkTypeOut,
|
||||
};
|
||||
|
||||
/**
|
||||
* A linked-list of the inputs/outputs of the filter chain.
|
||||
*/
|
||||
typedef struct AVFilterInOut {
|
||||
enum LinkType type;
|
||||
char *name;
|
||||
int instance;
|
||||
int pad_idx;
|
||||
|
||||
struct AVFilterInOut *next;
|
||||
} AVFilterInOut;
|
||||
|
||||
static void free_inout(AVFilterInOut *head)
|
||||
{
|
||||
while (head) {
|
||||
AVFilterInOut *next;
|
||||
next = head->next;
|
||||
av_free(head);
|
||||
head = next;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Parse "(a1)(link2) ... (etc)"
|
||||
*/
|
||||
static int parse_inouts(const char **buf, AVFilterInOut **inout, int firstpad,
|
||||
enum LinkType type, int instance)
|
||||
{
|
||||
int pad = firstpad;
|
||||
while (**buf == '(') {
|
||||
AVFilterInOut *inoutn = av_malloc(sizeof(AVFilterInOut));
|
||||
parse_link_name(buf, &inoutn->name);
|
||||
inoutn->type = type;
|
||||
inoutn->instance = instance;
|
||||
inoutn->pad_idx = pad++;
|
||||
inoutn->next = *inout;
|
||||
*inout = inoutn;
|
||||
}
|
||||
return pad;
|
||||
}
|
||||
|
||||
static AVFilterGraphDesc *parse_chain(const char *filters, int has_in)
|
||||
{
|
||||
AVFilterGraphDesc *ret;
|
||||
AVFilterGraphDescFilter **filterp, *filtern;
|
||||
AVFilterGraphDescLink **linkp, *linkn;
|
||||
AVFilterInOut *inout=NULL;
|
||||
AVFilterInOut *head;
|
||||
|
||||
int index = 0;
|
||||
char chr = 0;
|
||||
int pad = 0;
|
||||
int has_out = 0;
|
||||
|
||||
consume_whitespace(&filters);
|
||||
|
||||
if(!(ret = av_mallocz(sizeof(AVFilterGraphDesc))))
|
||||
return NULL;
|
||||
|
||||
filterp = &ret->filters;
|
||||
linkp = &ret->links;
|
||||
|
||||
do {
|
||||
if(chr == ',') {
|
||||
linkn = av_mallocz(sizeof(AVFilterGraphDescLink));
|
||||
linkn->src = index-1;
|
||||
linkn->srcpad = pad;
|
||||
linkn->dst = index;
|
||||
linkn->dstpad = 0;
|
||||
|
||||
*linkp = linkn;
|
||||
linkp = &linkn->next;
|
||||
}
|
||||
pad = parse_inouts(&filters, &inout, chr == ',' || (!has_in),
|
||||
LinkTypeIn, index);
|
||||
|
||||
filtern = av_mallocz(sizeof(AVFilterGraphDescFilter));
|
||||
filtern->index = index;
|
||||
parse_filter(&filters, &filtern->filter, &filtern->args);
|
||||
*filterp = filtern;
|
||||
filterp = &filtern->next;
|
||||
|
||||
pad = parse_inouts(&filters, &inout, 0,
|
||||
LinkTypeOut, index);
|
||||
chr = consume_char(&filters);
|
||||
index++;
|
||||
} while (chr == ',' || chr == ';');
|
||||
|
||||
head = inout;
|
||||
for (; inout != NULL; inout = inout->next) {
|
||||
if (inout->instance == -1)
|
||||
continue; // Already processed
|
||||
|
||||
if (!strcmp(inout->name, "in")) {
|
||||
if (!has_in)
|
||||
goto fail;
|
||||
ret->inputs = av_mallocz(sizeof(AVFilterGraphDescExport));
|
||||
ret->inputs->filter = inout->instance;
|
||||
ret->inputs->pad = inout->pad_idx;
|
||||
} else if (!strcmp(inout->name, "out")) {
|
||||
has_out = 1;
|
||||
ret->outputs = av_mallocz(sizeof(AVFilterGraphDescExport));
|
||||
ret->outputs->filter = inout->instance;
|
||||
ret->outputs->pad = inout->pad_idx;
|
||||
} else {
|
||||
AVFilterInOut *p, *src, *dst;
|
||||
for (p = inout->next;
|
||||
p && strcmp(p->name,inout->name); p = p->next);
|
||||
|
||||
if (!p) {
|
||||
av_log(&log_ctx, AV_LOG_ERROR, "Unmatched link: %s.\n",
|
||||
inout->name);
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if (p->type == LinkTypeIn && inout->type == LinkTypeOut) {
|
||||
src = inout;
|
||||
dst = p;
|
||||
} else if (p->type == LinkTypeOut && inout->type == LinkTypeIn) {
|
||||
src = p;
|
||||
dst = inout;
|
||||
} else {
|
||||
av_log(&log_ctx, AV_LOG_ERROR, "Two links named '%s' are either both input or both output\n",
|
||||
inout->name);
|
||||
goto fail;
|
||||
}
|
||||
linkn = av_mallocz(sizeof(AVFilterGraphDescLink));
|
||||
|
||||
linkn->src = src->instance;
|
||||
linkn->srcpad = src->pad_idx;
|
||||
linkn->dst = dst->instance;
|
||||
linkn->dstpad = dst->pad_idx;
|
||||
|
||||
*linkp = linkn;
|
||||
linkp = &linkn->next;
|
||||
|
||||
src->instance = -1;
|
||||
dst->instance = -1;
|
||||
}
|
||||
}
|
||||
|
||||
free_inout(head);
|
||||
|
||||
if (!has_in) {
|
||||
ret->inputs = av_mallocz(sizeof(AVFilterGraphDescExport));
|
||||
ret->inputs->filter = 0;
|
||||
}
|
||||
if (!has_out) {
|
||||
ret->outputs = av_mallocz(sizeof(AVFilterGraphDescExport));
|
||||
ret->outputs->filter = index-1;
|
||||
}
|
||||
|
||||
return ret;
|
||||
|
||||
fail:
|
||||
free_inout(head);
|
||||
|
||||
avfilter_graph_free_desc(ret);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* Parse a string describing a filter graph.
|
||||
*/
|
||||
AVFilterGraphDesc *avfilter_graph_parse_chain(const char *filters)
|
||||
{
|
||||
AVFilterGraphDesc *ret;
|
||||
|
||||
/* Try first to parse supposing there is no (in) element */
|
||||
if ((ret = parse_chain(filters, 0)))
|
||||
return ret;
|
||||
|
||||
/* Parse supposing there is an (in) element */
|
||||
return parse_chain(filters, 1);
|
||||
}
|
||||
|
||||
/**
|
||||
* Free a graph description.
|
||||
*/
|
||||
void avfilter_graph_free_desc(AVFilterGraphDesc *desc)
|
||||
{
|
||||
void *next;
|
||||
|
||||
while(desc->filters) {
|
||||
next = desc->filters->next;
|
||||
av_free(desc->filters->filter);
|
||||
av_free(desc->filters->args);
|
||||
av_free(desc->filters);
|
||||
desc->filters = next;
|
||||
}
|
||||
|
||||
while(desc->links) {
|
||||
next = desc->links->next;
|
||||
av_free(desc->links);
|
||||
desc->links = next;
|
||||
}
|
||||
|
||||
while(desc->inputs) {
|
||||
next = desc->inputs->next;
|
||||
av_free(desc->inputs);
|
||||
desc->inputs = next;
|
||||
}
|
||||
|
||||
while(desc->outputs) {
|
||||
next = desc->outputs->next;
|
||||
av_free(desc->outputs);
|
||||
desc->outputs = next;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user