diff options
Diffstat (limited to 'libavutil/samplefmt.c')
-rw-r--r-- | libavutil/samplefmt.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/libavutil/samplefmt.c b/libavutil/samplefmt.c new file mode 100644 index 0000000000..c9ffd1ac55 --- /dev/null +++ b/libavutil/samplefmt.c @@ -0,0 +1,73 @@ +/* + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "samplefmt.h" + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +typedef struct SampleFmtInfo { + const char *name; + int bits; +} SampleFmtInfo; + +/** this table gives more information about formats */ +static const SampleFmtInfo sample_fmt_info[AV_SAMPLE_FMT_NB] = { + [AV_SAMPLE_FMT_U8] = { .name = "u8", .bits = 8 }, + [AV_SAMPLE_FMT_S16] = { .name = "s16", .bits = 16 }, + [AV_SAMPLE_FMT_S32] = { .name = "s32", .bits = 32 }, + [AV_SAMPLE_FMT_FLT] = { .name = "flt", .bits = 32 }, + [AV_SAMPLE_FMT_DBL] = { .name = "dbl", .bits = 64 }, +}; + +const char *av_get_sample_fmt_name(enum AVSampleFormat sample_fmt) +{ + if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB) + return NULL; + return sample_fmt_info[sample_fmt].name; +} + +enum AVSampleFormat av_get_sample_fmt(const char *name) +{ + int i; + + for (i = 0; i < AV_SAMPLE_FMT_NB; i++) + if (!strcmp(sample_fmt_info[i].name, name)) + return i; + return AV_SAMPLE_FMT_NONE; +} + +char *av_get_sample_fmt_string (char *buf, int buf_size, enum AVSampleFormat sample_fmt) +{ + /* print header */ + if (sample_fmt < 0) + snprintf(buf, buf_size, "name " " depth"); + else if (sample_fmt < AV_SAMPLE_FMT_NB) { + SampleFmtInfo info = sample_fmt_info[sample_fmt]; + snprintf (buf, buf_size, "%-6s" " %2d ", info.name, info.bits); + } + + return buf; +} + +int av_get_bits_per_sample_fmt(enum AVSampleFormat sample_fmt) +{ + return sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB ? + 0 : sample_fmt_info[sample_fmt].bits; +} |