6fc3b7e4674e1d307532a6c23e424c8184d2bc6b
[libav.git] / libavutil / samplefmt.c
1 /*
2 * This file is part of Libav.
3 *
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include "samplefmt.h"
20
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24
25 typedef struct SampleFmtInfo {
26 const char *name;
27 int bits;
28 int planar;
29 } SampleFmtInfo;
30
31 /** this table gives more information about formats */
32 static const SampleFmtInfo sample_fmt_info[AV_SAMPLE_FMT_NB] = {
33 [AV_SAMPLE_FMT_U8] = { .name = "u8", .bits = 8, .planar = 0 },
34 [AV_SAMPLE_FMT_S16] = { .name = "s16", .bits = 16, .planar = 0 },
35 [AV_SAMPLE_FMT_S32] = { .name = "s32", .bits = 32, .planar = 0 },
36 [AV_SAMPLE_FMT_FLT] = { .name = "flt", .bits = 32, .planar = 0 },
37 [AV_SAMPLE_FMT_DBL] = { .name = "dbl", .bits = 64, .planar = 0 },
38 [AV_SAMPLE_FMT_U8P] = { .name = "u8p", .bits = 8, .planar = 1 },
39 [AV_SAMPLE_FMT_S16P] = { .name = "s16p", .bits = 16, .planar = 1 },
40 [AV_SAMPLE_FMT_S32P] = { .name = "s32p", .bits = 32, .planar = 1 },
41 [AV_SAMPLE_FMT_FLTP] = { .name = "fltp", .bits = 32, .planar = 1 },
42 [AV_SAMPLE_FMT_DBLP] = { .name = "dblp", .bits = 64, .planar = 1 },
43 };
44
45 const char *av_get_sample_fmt_name(enum AVSampleFormat sample_fmt)
46 {
47 if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB)
48 return NULL;
49 return sample_fmt_info[sample_fmt].name;
50 }
51
52 enum AVSampleFormat av_get_sample_fmt(const char *name)
53 {
54 int i;
55
56 for (i = 0; i < AV_SAMPLE_FMT_NB; i++)
57 if (!strcmp(sample_fmt_info[i].name, name))
58 return i;
59 return AV_SAMPLE_FMT_NONE;
60 }
61
62 char *av_get_sample_fmt_string (char *buf, int buf_size, enum AVSampleFormat sample_fmt)
63 {
64 /* print header */
65 if (sample_fmt < 0)
66 snprintf(buf, buf_size, "name " " depth");
67 else if (sample_fmt < AV_SAMPLE_FMT_NB) {
68 SampleFmtInfo info = sample_fmt_info[sample_fmt];
69 snprintf (buf, buf_size, "%-6s" " %2d ", info.name, info.bits);
70 }
71
72 return buf;
73 }
74
75 int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
76 {
77 return sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB ?
78 0 : sample_fmt_info[sample_fmt].bits >> 3;
79 }
80
81 #if FF_API_GET_BITS_PER_SAMPLE_FMT
82 int av_get_bits_per_sample_fmt(enum AVSampleFormat sample_fmt)
83 {
84 return sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB ?
85 0 : sample_fmt_info[sample_fmt].bits;
86 }
87 #endif
88
89 int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
90 {
91 if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB)
92 return 0;
93 return sample_fmt_info[sample_fmt].planar;
94 }