2 * Copyright (c) 2009 Stefano Sabatini
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "libavutil/channel_layout.h"
24 #include "libavutil/mem.h"
25 #include "libavutil/pixdesc.h"
26 #include "libavutil/samplefmt.h"
28 #include "libavfilter/avfilter.h"
29 #include "libavfilter/formats.h"
31 static void print_formats(AVFilterContext *filter_ctx)
35 #define PRINT_FMTS(inout, outin, INOUT) \
36 for (i = 0; i < filter_ctx->nb_##inout##puts; i++) { \
37 if (filter_ctx->inout##puts[i]->type == AVMEDIA_TYPE_VIDEO) { \
38 AVFilterFormats *fmts = \
39 filter_ctx->inout##puts[i]->outin##_formats; \
40 for (j = 0; j < fmts->nb_formats; j++) \
41 if(av_get_pix_fmt_name(fmts->formats[j])) \
42 printf(#INOUT "PUT[%d] %s: fmt:%s\n", \
43 i, avfilter_pad_get_name(filter_ctx->inout##put_pads, i), \
44 av_get_pix_fmt_name(fmts->formats[j])); \
45 } else if (filter_ctx->inout##puts[i]->type == AVMEDIA_TYPE_AUDIO) { \
46 AVFilterFormats *fmts; \
47 AVFilterChannelLayouts *layouts; \
49 fmts = filter_ctx->inout##puts[i]->outin##_formats; \
50 for (j = 0; j < fmts->nb_formats; j++) \
51 printf(#INOUT "PUT[%d] %s: fmt:%s\n", \
52 i, avfilter_pad_get_name(filter_ctx->inout##put_pads, i), \
53 av_get_sample_fmt_name(fmts->formats[j])); \
55 layouts = filter_ctx->inout##puts[i]->outin##_channel_layouts; \
56 for (j = 0; j < layouts->nb_channel_layouts; j++) { \
58 av_get_channel_layout_string(buf, sizeof(buf), -1, \
59 layouts->channel_layouts[j]); \
60 printf(#INOUT "PUT[%d] %s: chlayout:%s\n", \
61 i, avfilter_pad_get_name(filter_ctx->inout##put_pads, i), buf); \
66 PRINT_FMTS(in, out, IN);
67 PRINT_FMTS(out, in, OUT);
70 int main(int argc, char **argv)
73 AVFilterContext *filter_ctx;
74 AVFilterGraph *graph_ctx;
75 const char *filter_name;
76 const char *filter_args = NULL;
80 av_log_set_level(AV_LOG_DEBUG);
83 fprintf(stderr, "Missing filter name as argument\n");
87 filter_name = argv[1];
89 filter_args = argv[2];
92 graph_ctx = avfilter_graph_alloc();
96 avfilter_register_all();
98 /* get a corresponding filter and open it */
99 if (!(filter = avfilter_get_by_name(filter_name))) {
100 fprintf(stderr, "Unrecognized filter with name '%s'\n", filter_name);
104 /* open filter and add it to the graph */
105 if (!(filter_ctx = avfilter_graph_alloc_filter(graph_ctx, filter, filter_name))) {
106 fprintf(stderr, "Impossible to open filter with name '%s'\n",
110 if (avfilter_init_str(filter_ctx, filter_args) < 0) {
111 fprintf(stderr, "Impossible to init filter '%s' with arguments '%s'\n",
112 filter_name, filter_args);
116 /* create a link for each of the input pads */
117 for (i = 0; i < filter_ctx->nb_inputs; i++) {
118 AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
120 fprintf(stderr, "Unable to allocate memory for filter input link\n");
124 link->type = avfilter_pad_get_type(filter_ctx->input_pads, i);
125 filter_ctx->inputs[i] = link;
127 for (i = 0; i < filter_ctx->nb_outputs; i++) {
128 AVFilterLink *link = av_mallocz(sizeof(AVFilterLink));
130 fprintf(stderr, "Unable to allocate memory for filter output link\n");
134 link->type = avfilter_pad_get_type(filter_ctx->output_pads, i);
135 filter_ctx->outputs[i] = link;
138 if (filter->query_formats)
139 filter->query_formats(filter_ctx);
141 ff_default_query_formats(filter_ctx);
143 print_formats(filter_ctx);
146 avfilter_free(filter_ctx);
147 avfilter_graph_free(&graph_ctx);