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/pixdesc.h"
23 #include "libavutil/audioconvert.h"
27 * Add all refs from a to ret and destroy a.
29 static void merge_ref(AVFilterFormats *ret, AVFilterFormats *a)
33 for (i = 0; i < a->refcount; i++) {
34 ret->refs[ret->refcount] = a->refs[i];
35 *ret->refs[ret->refcount++] = ret;
43 AVFilterFormats *avfilter_merge_formats(AVFilterFormats *a, AVFilterFormats *b)
50 ret = av_mallocz(sizeof(AVFilterFormats));
52 /* merge list of formats */
53 ret->formats = av_malloc(sizeof(*ret->formats) * FFMIN(a->format_count,
55 for (i = 0; i < a->format_count; i++)
56 for (j = 0; j < b->format_count; j++)
57 if (a->formats[i] == b->formats[j])
58 ret->formats[k++] = a->formats[i];
60 ret->format_count = k;
61 /* check that there was at least one common format */
62 if (!ret->format_count) {
63 av_free(ret->formats);
68 ret->refs = av_malloc(sizeof(AVFilterFormats**)*(a->refcount+b->refcount));
76 #define MAKE_FORMAT_LIST() \
77 AVFilterFormats *formats; \
80 for (count = 0; fmts[count] != -1; count++) \
82 formats = av_mallocz(sizeof(AVFilterFormats)); \
83 if (!formats) return NULL; \
84 formats->format_count = count; \
86 formats->formats = av_malloc(sizeof(*formats->formats)*count); \
87 if (!formats->formats) { \
93 AVFilterFormats *avfilter_make_format_list(const int *fmts)
97 formats->formats[count] = fmts[count];
102 AVFilterFormats *avfilter_make_format64_list(const int64_t *fmts)
106 memcpy(formats->formats, fmts, sizeof(*formats->formats) * count);
111 int avfilter_add_format(AVFilterFormats **avff, int64_t fmt)
115 if (!(*avff) && !(*avff = av_mallocz(sizeof(AVFilterFormats))))
116 return AVERROR(ENOMEM);
118 fmts = av_realloc((*avff)->formats,
119 sizeof(*(*avff)->formats) * ((*avff)->format_count+1));
121 return AVERROR(ENOMEM);
123 (*avff)->formats = fmts;
124 (*avff)->formats[(*avff)->format_count++] = fmt;
128 AVFilterFormats *avfilter_all_formats(enum AVMediaType type)
130 AVFilterFormats *ret = NULL;
132 int num_formats = type == AVMEDIA_TYPE_VIDEO ? PIX_FMT_NB :
133 type == AVMEDIA_TYPE_AUDIO ? AV_SAMPLE_FMT_NB : 0;
135 for (fmt = 0; fmt < num_formats; fmt++)
136 if ((type != AVMEDIA_TYPE_VIDEO) ||
137 (type == AVMEDIA_TYPE_VIDEO && !(av_pix_fmt_descriptors[fmt].flags & PIX_FMT_HWACCEL)))
138 avfilter_add_format(&ret, fmt);
143 AVFilterFormats *avfilter_all_channel_layouts(void)
145 static int64_t chlayouts[] = {
148 AV_CH_LAYOUT_4POINT0,
150 AV_CH_LAYOUT_5POINT0,
151 AV_CH_LAYOUT_5POINT0_BACK,
152 AV_CH_LAYOUT_5POINT1,
153 AV_CH_LAYOUT_5POINT1_BACK,
154 AV_CH_LAYOUT_5POINT1|AV_CH_LAYOUT_STEREO_DOWNMIX,
155 AV_CH_LAYOUT_7POINT1,
156 AV_CH_LAYOUT_7POINT1_WIDE,
157 AV_CH_LAYOUT_7POINT1|AV_CH_LAYOUT_STEREO_DOWNMIX,
161 return avfilter_make_format64_list(chlayouts);
164 void avfilter_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
167 f->refs = av_realloc(f->refs, sizeof(AVFilterFormats**) * ++f->refcount);
168 f->refs[f->refcount-1] = ref;
171 static int find_ref_index(AVFilterFormats **ref)
174 for (i = 0; i < (*ref)->refcount; i++)
175 if ((*ref)->refs[i] == ref)
180 void avfilter_formats_unref(AVFilterFormats **ref)
187 idx = find_ref_index(ref);
190 memmove((*ref)->refs + idx, (*ref)->refs + idx+1,
191 sizeof(AVFilterFormats**) * ((*ref)->refcount-idx-1));
193 if (!--(*ref)->refcount) {
194 av_free((*ref)->formats);
195 av_free((*ref)->refs);
201 void avfilter_formats_changeref(AVFilterFormats **oldref,
202 AVFilterFormats **newref)
204 int idx = find_ref_index(oldref);
207 (*oldref)->refs[idx] = newref;