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Almost from scratch rewrite of filter parser.

Browse Source 
Functional as is, but still work-in-progress in the
sense that some things need to be fixed before sending
it as a patch to SVN.

Commited in SoC by Vitor Sessak on 2008-03-20 21:48:30

Originally committed as revision 12729 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vitor Sessak 2008-04-04 20:08:34 +00:00
parent 3ec394ea82
commit 789210fa22
2 changed files with 18 additions and 84 deletions
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94
libavfilter/avfiltergraph.c
View File

@ -463,9 +463,7 @@ static void pick_formats(GraphContext *graph)
for(i = 0; i < graph->filter_count; i ++) {
AVFilterContext *filter = graph->filters[i];
if(filter->filter == &avfilter_vf_graph ||
filter->filter == &avfilter_vf_graphfile ||
filter->filter == &avfilter_vf_graphdesc)
if(filter->filter == &avfilter_vf_graph)
pick_formats(filter->priv);
for(j = 0; j < filter->input_count; j ++)
@ -498,30 +496,34 @@ static int graph_load_from_desc(AVFilterContext *ctx, AVFilterGraphDesc *desc)
AVFilterContext *filt, *filtb;
AVFilter *filterdef;
char tmp[20];
/* create all filters */
for(curfilt = desc->filters; curfilt; curfilt = curfilt->next) {
snprintf(tmp, 20, "%d", curfilt->index);
if(!(filterdef = avfilter_get_by_name(curfilt->filter)) ||
!(filt = avfilter_open(filterdef, curfilt->name))) {
!(filt = avfilter_open(filterdef, tmp))) {
av_log(ctx, AV_LOG_ERROR,
"error creating filter '%s'\n", curfilt->name);
"error creating filter '%s'\n", curfilt->filter);
goto fail;
}
avfilter_graph_add_filter(ctx, filt);
if(avfilter_init_filter(filt, curfilt->args, NULL)) {
av_log(ctx, AV_LOG_ERROR,
"error initializing filter '%s'\n", curfilt->name);
"error initializing filter '%s'\n", curfilt->filter);
goto fail;
}
}
/* create all links */
for(curlink = desc->links; curlink; curlink = curlink->next) {
if(!(filt = avfilter_graph_get_filter(ctx, curlink->src))) {
snprintf(tmp, 20, "%d", curlink->src);
if(!(filt = avfilter_graph_get_filter(ctx, tmp))) {
av_log(ctx, AV_LOG_ERROR, "link source does not exist in graph\n");
goto fail;
}
if(!(filtb = avfilter_graph_get_filter(ctx, curlink->dst))) {
snprintf(tmp, 20, "%d", curlink->dst);
if(!(filtb = avfilter_graph_get_filter(ctx, tmp))) {
av_log(ctx, AV_LOG_ERROR, "link destination does not exist in graph\n");
goto fail;
}
@ -533,7 +535,8 @@ static int graph_load_from_desc(AVFilterContext *ctx, AVFilterGraphDesc *desc)
/* export all input pads */
for(curpad = desc->inputs; curpad; curpad = curpad->next) {
if(!(filt = avfilter_graph_get_filter(ctx, curpad->filter))) {
snprintf(tmp, 20, "%d", curpad->filter);
if(!(filt = avfilter_graph_get_filter(ctx, tmp))) {
av_log(ctx, AV_LOG_ERROR, "filter owning exported pad does not exist\n");
goto fail;
}
@ -542,7 +545,8 @@ static int graph_load_from_desc(AVFilterContext *ctx, AVFilterGraphDesc *desc)
/* export all output pads */
for(curpad = desc->outputs; curpad; curpad = curpad->next) {
if(!(filt = avfilter_graph_get_filter(ctx, curpad->filter))) {
snprintf(tmp, 20, "%d", curpad->filter);
if(!(filt = avfilter_graph_get_filter(ctx, tmp))) {
av_log(ctx, AV_LOG_ERROR, "filter owning exported pad does not exist\n");
goto fail;
}
@ -603,73 +607,3 @@ AVFilter avfilter_vf_graph =
.outputs = (AVFilterPad[]) {{ .name = NULL, }},
};
static int init_desc(AVFilterContext *ctx, const char *args, void *opaque)
{
GraphContext *gctx = ctx->priv;
if(!opaque)
return -1;
if(!(gctx->link_filter_in = avfilter_open(&vf_graph_dummy, NULL)))
return -1;
if(avfilter_init_filter(gctx->link_filter_in, NULL, ctx))
goto fail;
if(!(gctx->link_filter_out = avfilter_open(&vf_graph_dummy, NULL)))
goto fail;
if(avfilter_init_filter(gctx->link_filter_out, NULL, ctx))
goto fail;
return graph_load_from_desc(ctx, opaque);
fail:
avfilter_destroy(gctx->link_filter_in);
if(gctx->link_filter_out)
avfilter_destroy(gctx->link_filter_out);
return -1;
}
AVFilter avfilter_vf_graphdesc =
{
.name = "graph_desc",
.priv_size = sizeof(GraphContext),
.init = init_desc,
.uninit = uninit,
.query_formats = query_formats,
.inputs = (AVFilterPad[]) {{ .name = NULL, }},
.outputs = (AVFilterPad[]) {{ .name = NULL, }},
};
static int init_file(AVFilterContext *ctx, const char *args, void *opaque)
{
AVFilterGraphDesc *desc;
int ret;
if(!args)
return -1;
if(!(desc = avfilter_graph_load_desc(args)))
return -1;
ret = init_desc(ctx, NULL, desc);
avfilter_graph_free_desc(desc);
return ret;
}
AVFilter avfilter_vf_graphfile =
{
.name = "graph_file",
.priv_size = sizeof(GraphContext),
.init = init_file,
.uninit = uninit,
.query_formats = query_formats,
.inputs = (AVFilterPad[]) {{ .name = NULL, }},
.outputs = (AVFilterPad[]) {{ .name = NULL, }},
};

8
libavfilter/avfiltergraph.h
View File

@ -27,7 +27,7 @@
/** Linked-list of filters to create for an AVFilterGraphDesc */
typedef struct AVFilterGraphDescFilter
{
char *name; ///< filter instance name
int index; ///< filter instance index
char *filter; ///< name of filter type
char *args; ///< filter parameters
struct AVFilterGraphDescFilter *next;
@ -37,10 +37,10 @@ typedef struct AVFilterGraphDescFilter
typedef struct AVFilterGraphDescLink
{
/* TODO: allow referencing pads by name, not just by index */
char *src; ///< name of the source filter
int src; ///< index of the source filter
unsigned srcpad; ///< index of the output pad on the source filter
char *dst; ///< name of the dest filter
int dst; ///< index of the dest filter
unsigned dstpad; ///< index of the input pad on the dest filter
struct AVFilterGraphDescLink *next;
@ -51,7 +51,7 @@ typedef struct AVFilterGraphDescExport
{
/* TODO: allow referencing pads by name, not just by index */
char *name; ///< name of the exported pad
char *filter; ///< name of the filter
int filter; ///< index of the filter
unsigned pad; ///< index of the pad to be exported
struct AVFilterGraphDescExport *next;