| /* |
| * 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_bytes_per_sample(enum AVSampleFormat sample_fmt) |
| { |
| return sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB ? |
| 0 : sample_fmt_info[sample_fmt].bits >> 3; |
| } |
| |
| #if FF_API_GET_BITS_PER_SAMPLE_FMT |
| 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; |
| } |
| #endif |
| |
| int av_samples_fill_arrays(uint8_t *pointers[8], int linesizes[8], |
| uint8_t *buf, int nb_channels, int nb_samples, |
| enum AVSampleFormat sample_fmt, int planar, int align) |
| { |
| int i, linesize; |
| int sample_size = av_get_bits_per_sample_fmt(sample_fmt) >> 3; |
| |
| if (nb_channels * (uint64_t)nb_samples * sample_size >= INT_MAX - align*(uint64_t)nb_channels) |
| return AVERROR(EINVAL); |
| linesize = planar ? FFALIGN(nb_samples*sample_size, align) : |
| FFALIGN(nb_samples*sample_size*nb_channels, align); |
| |
| if (pointers) { |
| pointers[0] = buf; |
| for (i = 1; planar && i < nb_channels; i++) { |
| pointers[i] = pointers[i-1] + linesize; |
| } |
| memset(&pointers[i], 0, (8-i) * sizeof(pointers[0])); |
| } |
| |
| if (linesizes) { |
| linesizes[0] = linesize; |
| for (i = 1; planar && i < nb_channels; i++) |
| linesizes[i] = linesizes[0]; |
| memset(&linesizes[i], 0, (8-i) * sizeof(linesizes[0])); |
| } |
| |
| return planar ? linesize * nb_channels : linesize; |
| } |
| |
| int av_samples_alloc(uint8_t *pointers[8], int linesizes[8], |
| int nb_channels, int nb_samples, |
| enum AVSampleFormat sample_fmt, int planar, |
| int align) |
| { |
| uint8_t *buf; |
| int size = av_samples_fill_arrays(NULL, NULL, |
| NULL, nb_channels, nb_samples, |
| sample_fmt, planar, align); |
| |
| buf = av_mallocz(size); |
| if (!buf) |
| return AVERROR(ENOMEM); |
| |
| return av_samples_fill_arrays(pointers, linesizes, |
| buf, nb_channels, nb_samples, |
| sample_fmt, planar, align); |
| } |