2 * Filter layer - format negotiation
3 * Copyright (c) 2007 Bobby Bingham
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/eval.h"
23 #include "libavutil/pixdesc.h"
24 #include "libavutil/audioconvert.h"
29 * Add all refs from a to ret and destroy a.
31 static void merge_ref(AVFilterFormats *ret, AVFilterFormats *a)
35 for (i = 0; i < a->refcount; i++) {
36 ret->refs[ret->refcount] = a->refs[i];
37 *ret->refs[ret->refcount++] = ret;
45 AVFilterFormats *avfilter_merge_formats(AVFilterFormats *a, AVFilterFormats *b)
52 ret = av_mallocz(sizeof(AVFilterFormats));
54 /* merge list of formats */
55 ret->formats = av_malloc(sizeof(*ret->formats) * FFMIN(a->format_count,
57 for (i = 0; i < a->format_count; i++)
58 for (j = 0; j < b->format_count; j++)
59 if (a->formats[i] == b->formats[j])
60 ret->formats[k++] = a->formats[i];
62 ret->format_count = k;
63 /* check that there was at least one common format */
64 if (!ret->format_count) {
65 av_free(ret->formats);
70 ret->refs = av_malloc(sizeof(AVFilterFormats**)*(a->refcount+b->refcount));
78 int ff_fmt_is_in(int fmt, const int *fmts)
82 for (p = fmts; *p != -1; p++) {
89 #define MAKE_FORMAT_LIST() \
90 AVFilterFormats *formats; \
93 for (count = 0; fmts[count] != -1; count++) \
95 formats = av_mallocz(sizeof(AVFilterFormats)); \
96 if (!formats) return NULL; \
97 formats->format_count = count; \
99 formats->formats = av_malloc(sizeof(*formats->formats)*count); \
100 if (!formats->formats) { \
106 AVFilterFormats *avfilter_make_format_list(const int *fmts)
110 formats->formats[count] = fmts[count];
115 AVFilterFormats *avfilter_make_format64_list(const int64_t *fmts)
119 memcpy(formats->formats, fmts, sizeof(*formats->formats) * count);
124 int avfilter_add_format(AVFilterFormats **avff, int64_t fmt)
128 if (!(*avff) && !(*avff = av_mallocz(sizeof(AVFilterFormats))))
129 return AVERROR(ENOMEM);
131 fmts = av_realloc((*avff)->formats,
132 sizeof(*(*avff)->formats) * ((*avff)->format_count+1));
134 return AVERROR(ENOMEM);
136 (*avff)->formats = fmts;
137 (*avff)->formats[(*avff)->format_count++] = fmt;
141 #if FF_API_OLD_ALL_FORMATS_API
142 AVFilterFormats *avfilter_all_formats(enum AVMediaType type)
144 return avfilter_make_all_formats(type);
148 AVFilterFormats *avfilter_make_all_formats(enum AVMediaType type)
150 AVFilterFormats *ret = NULL;
152 int num_formats = type == AVMEDIA_TYPE_VIDEO ? PIX_FMT_NB :
153 type == AVMEDIA_TYPE_AUDIO ? AV_SAMPLE_FMT_NB : 0;
155 for (fmt = 0; fmt < num_formats; fmt++)
156 if ((type != AVMEDIA_TYPE_VIDEO) ||
157 (type == AVMEDIA_TYPE_VIDEO && !(av_pix_fmt_descriptors[fmt].flags & PIX_FMT_HWACCEL)))
158 avfilter_add_format(&ret, fmt);
163 const int64_t avfilter_all_channel_layouts[] = {
164 #include "all_channel_layouts.h"
168 AVFilterFormats *avfilter_make_all_channel_layouts(void)
170 return avfilter_make_format64_list(avfilter_all_channel_layouts);
173 AVFilterFormats *avfilter_make_all_packing_formats(void)
175 static int packing[] = {
181 return avfilter_make_format_list(packing);
184 void avfilter_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
187 f->refs = av_realloc(f->refs, sizeof(AVFilterFormats**) * ++f->refcount);
188 f->refs[f->refcount-1] = ref;
191 static int find_ref_index(AVFilterFormats **ref)
194 for (i = 0; i < (*ref)->refcount; i++)
195 if ((*ref)->refs[i] == ref)
200 void avfilter_formats_unref(AVFilterFormats **ref)
207 idx = find_ref_index(ref);
210 memmove((*ref)->refs + idx, (*ref)->refs + idx+1,
211 sizeof(AVFilterFormats**) * ((*ref)->refcount-idx-1));
213 if (!--(*ref)->refcount) {
214 av_free((*ref)->formats);
215 av_free((*ref)->refs);
221 void avfilter_formats_changeref(AVFilterFormats **oldref,
222 AVFilterFormats **newref)
224 int idx = find_ref_index(oldref);
227 (*oldref)->refs[idx] = newref;
233 /* internal functions for parsing audio format arguments */
235 int ff_parse_pixel_format(enum PixelFormat *ret, const char *arg, void *log_ctx)
238 int pix_fmt = av_get_pix_fmt(arg);
239 if (pix_fmt == PIX_FMT_NONE) {
240 pix_fmt = strtol(arg, &tail, 0);
241 if (*tail || (unsigned)pix_fmt >= PIX_FMT_NB) {
242 av_log(log_ctx, AV_LOG_ERROR, "Invalid pixel format '%s'\n", arg);
243 return AVERROR(EINVAL);
250 int ff_parse_sample_format(int *ret, const char *arg, void *log_ctx)
253 int sfmt = av_get_sample_fmt(arg);
254 if (sfmt == AV_SAMPLE_FMT_NONE) {
255 sfmt = strtol(arg, &tail, 0);
256 if (*tail || (unsigned)sfmt >= AV_SAMPLE_FMT_NB) {
257 av_log(log_ctx, AV_LOG_ERROR, "Invalid sample format '%s'\n", arg);
258 return AVERROR(EINVAL);
265 int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx)
268 double srate = av_strtod(arg, &tail);
269 if (*tail || srate < 1 || (int)srate != srate || srate > INT_MAX) {
270 av_log(log_ctx, AV_LOG_ERROR, "Invalid sample rate '%s'\n", arg);
271 return AVERROR(EINVAL);
277 int ff_parse_channel_layout(int64_t *ret, const char *arg, void *log_ctx)
280 int64_t chlayout = av_get_channel_layout(arg);
282 chlayout = strtol(arg, &tail, 10);
283 if (*tail || chlayout == 0) {
284 av_log(log_ctx, AV_LOG_ERROR, "Invalid channel layout '%s'\n", arg);
285 return AVERROR(EINVAL);
292 int ff_parse_packing_format(int *ret, const char *arg, void *log_ctx)
295 int planar = strtol(arg, &tail, 10);
297 planar = !strcmp(arg, "packed") ? 0:
298 !strcmp(arg, "planar") ? 1: -1;
301 if (planar != 0 && planar != 1) {
302 av_log(log_ctx, AV_LOG_ERROR, "Invalid packing format '%s'\n", arg);
303 return AVERROR(EINVAL);
318 for (cl = avfilter_all_channel_layouts; *cl != -1; cl++) {
319 av_get_channel_layout_string(buf, sizeof(buf), -1, *cl);