| 1 | /* |
| 2 | * This file is part of FFmpeg. |
| 3 | * |
| 4 | * FFmpeg 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 | * FFmpeg 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 FFmpeg; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ |
| 18 | |
| 19 | #include "common.h" |
| 20 | #include "samplefmt.h" |
| 21 | |
| 22 | #include <stdio.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <string.h> |
| 25 | |
| 26 | typedef struct SampleFmtInfo { |
| 27 | char name[8]; |
| 28 | int bits; |
| 29 | int planar; |
| 30 | enum AVSampleFormat altform; ///< planar<->packed alternative form |
| 31 | } SampleFmtInfo; |
| 32 | |
| 33 | /** this table gives more information about formats */ |
| 34 | static const SampleFmtInfo sample_fmt_info[AV_SAMPLE_FMT_NB] = { |
| 35 | [AV_SAMPLE_FMT_U8] = { .name = "u8", .bits = 8, .planar = 0, .altform = AV_SAMPLE_FMT_U8P }, |
| 36 | [AV_SAMPLE_FMT_S16] = { .name = "s16", .bits = 16, .planar = 0, .altform = AV_SAMPLE_FMT_S16P }, |
| 37 | [AV_SAMPLE_FMT_S32] = { .name = "s32", .bits = 32, .planar = 0, .altform = AV_SAMPLE_FMT_S32P }, |
| 38 | [AV_SAMPLE_FMT_FLT] = { .name = "flt", .bits = 32, .planar = 0, .altform = AV_SAMPLE_FMT_FLTP }, |
| 39 | [AV_SAMPLE_FMT_DBL] = { .name = "dbl", .bits = 64, .planar = 0, .altform = AV_SAMPLE_FMT_DBLP }, |
| 40 | [AV_SAMPLE_FMT_U8P] = { .name = "u8p", .bits = 8, .planar = 1, .altform = AV_SAMPLE_FMT_U8 }, |
| 41 | [AV_SAMPLE_FMT_S16P] = { .name = "s16p", .bits = 16, .planar = 1, .altform = AV_SAMPLE_FMT_S16 }, |
| 42 | [AV_SAMPLE_FMT_S32P] = { .name = "s32p", .bits = 32, .planar = 1, .altform = AV_SAMPLE_FMT_S32 }, |
| 43 | [AV_SAMPLE_FMT_FLTP] = { .name = "fltp", .bits = 32, .planar = 1, .altform = AV_SAMPLE_FMT_FLT }, |
| 44 | [AV_SAMPLE_FMT_DBLP] = { .name = "dblp", .bits = 64, .planar = 1, .altform = AV_SAMPLE_FMT_DBL }, |
| 45 | }; |
| 46 | |
| 47 | const char *av_get_sample_fmt_name(enum AVSampleFormat sample_fmt) |
| 48 | { |
| 49 | if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB) |
| 50 | return NULL; |
| 51 | return sample_fmt_info[sample_fmt].name; |
| 52 | } |
| 53 | |
| 54 | enum AVSampleFormat av_get_sample_fmt(const char *name) |
| 55 | { |
| 56 | int i; |
| 57 | |
| 58 | for (i = 0; i < AV_SAMPLE_FMT_NB; i++) |
| 59 | if (!strcmp(sample_fmt_info[i].name, name)) |
| 60 | return i; |
| 61 | return AV_SAMPLE_FMT_NONE; |
| 62 | } |
| 63 | |
| 64 | enum AVSampleFormat av_get_alt_sample_fmt(enum AVSampleFormat sample_fmt, int planar) |
| 65 | { |
| 66 | if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB) |
| 67 | return AV_SAMPLE_FMT_NONE; |
| 68 | if (sample_fmt_info[sample_fmt].planar == planar) |
| 69 | return sample_fmt; |
| 70 | return sample_fmt_info[sample_fmt].altform; |
| 71 | } |
| 72 | |
| 73 | enum AVSampleFormat av_get_packed_sample_fmt(enum AVSampleFormat sample_fmt) |
| 74 | { |
| 75 | if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB) |
| 76 | return AV_SAMPLE_FMT_NONE; |
| 77 | if (sample_fmt_info[sample_fmt].planar) |
| 78 | return sample_fmt_info[sample_fmt].altform; |
| 79 | return sample_fmt; |
| 80 | } |
| 81 | |
| 82 | enum AVSampleFormat av_get_planar_sample_fmt(enum AVSampleFormat sample_fmt) |
| 83 | { |
| 84 | if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB) |
| 85 | return AV_SAMPLE_FMT_NONE; |
| 86 | if (sample_fmt_info[sample_fmt].planar) |
| 87 | return sample_fmt; |
| 88 | return sample_fmt_info[sample_fmt].altform; |
| 89 | } |
| 90 | |
| 91 | char *av_get_sample_fmt_string (char *buf, int buf_size, enum AVSampleFormat sample_fmt) |
| 92 | { |
| 93 | /* print header */ |
| 94 | if (sample_fmt < 0) |
| 95 | snprintf(buf, buf_size, "name " " depth"); |
| 96 | else if (sample_fmt < AV_SAMPLE_FMT_NB) { |
| 97 | SampleFmtInfo info = sample_fmt_info[sample_fmt]; |
| 98 | snprintf (buf, buf_size, "%-6s" " %2d ", info.name, info.bits); |
| 99 | } |
| 100 | |
| 101 | return buf; |
| 102 | } |
| 103 | |
| 104 | int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt) |
| 105 | { |
| 106 | return sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB ? |
| 107 | 0 : sample_fmt_info[sample_fmt].bits >> 3; |
| 108 | } |
| 109 | |
| 110 | #if FF_API_GET_BITS_PER_SAMPLE_FMT |
| 111 | int av_get_bits_per_sample_fmt(enum AVSampleFormat sample_fmt) |
| 112 | { |
| 113 | return sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB ? |
| 114 | 0 : sample_fmt_info[sample_fmt].bits; |
| 115 | } |
| 116 | #endif |
| 117 | |
| 118 | int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt) |
| 119 | { |
| 120 | if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB) |
| 121 | return 0; |
| 122 | return sample_fmt_info[sample_fmt].planar; |
| 123 | } |
| 124 | |
| 125 | int av_samples_get_buffer_size(int *linesize, int nb_channels, int nb_samples, |
| 126 | enum AVSampleFormat sample_fmt, int align) |
| 127 | { |
| 128 | int line_size; |
| 129 | int sample_size = av_get_bytes_per_sample(sample_fmt); |
| 130 | int planar = av_sample_fmt_is_planar(sample_fmt); |
| 131 | |
| 132 | /* validate parameter ranges */ |
| 133 | if (!sample_size || nb_samples <= 0 || nb_channels <= 0) |
| 134 | return AVERROR(EINVAL); |
| 135 | |
| 136 | /* auto-select alignment if not specified */ |
| 137 | if (!align) { |
| 138 | if (nb_samples > INT_MAX - 31) |
| 139 | return AVERROR(EINVAL); |
| 140 | align = 1; |
| 141 | nb_samples = FFALIGN(nb_samples, 32); |
| 142 | } |
| 143 | |
| 144 | /* check for integer overflow */ |
| 145 | if (nb_channels > INT_MAX / align || |
| 146 | (int64_t)nb_channels * nb_samples > (INT_MAX - (align * nb_channels)) / sample_size) |
| 147 | return AVERROR(EINVAL); |
| 148 | |
| 149 | line_size = planar ? FFALIGN(nb_samples * sample_size, align) : |
| 150 | FFALIGN(nb_samples * sample_size * nb_channels, align); |
| 151 | if (linesize) |
| 152 | *linesize = line_size; |
| 153 | |
| 154 | return planar ? line_size * nb_channels : line_size; |
| 155 | } |
| 156 | |
| 157 | int av_samples_fill_arrays(uint8_t **audio_data, int *linesize, |
| 158 | const uint8_t *buf, int nb_channels, int nb_samples, |
| 159 | enum AVSampleFormat sample_fmt, int align) |
| 160 | { |
| 161 | int ch, planar, buf_size, line_size; |
| 162 | |
| 163 | planar = av_sample_fmt_is_planar(sample_fmt); |
| 164 | buf_size = av_samples_get_buffer_size(&line_size, nb_channels, nb_samples, |
| 165 | sample_fmt, align); |
| 166 | if (buf_size < 0) |
| 167 | return buf_size; |
| 168 | |
| 169 | audio_data[0] = (uint8_t *)buf; |
| 170 | for (ch = 1; planar && ch < nb_channels; ch++) |
| 171 | audio_data[ch] = audio_data[ch-1] + line_size; |
| 172 | |
| 173 | if (linesize) |
| 174 | *linesize = line_size; |
| 175 | |
| 176 | #if FF_API_SAMPLES_UTILS_RETURN_ZERO |
| 177 | return 0; |
| 178 | #else |
| 179 | return buf_size; |
| 180 | #endif |
| 181 | } |
| 182 | |
| 183 | int av_samples_alloc(uint8_t **audio_data, int *linesize, int nb_channels, |
| 184 | int nb_samples, enum AVSampleFormat sample_fmt, int align) |
| 185 | { |
| 186 | uint8_t *buf; |
| 187 | int size = av_samples_get_buffer_size(NULL, nb_channels, nb_samples, |
| 188 | sample_fmt, align); |
| 189 | if (size < 0) |
| 190 | return size; |
| 191 | |
| 192 | buf = av_malloc(size); |
| 193 | if (!buf) |
| 194 | return AVERROR(ENOMEM); |
| 195 | |
| 196 | size = av_samples_fill_arrays(audio_data, linesize, buf, nb_channels, |
| 197 | nb_samples, sample_fmt, align); |
| 198 | if (size < 0) { |
| 199 | av_free(buf); |
| 200 | return size; |
| 201 | } |
| 202 | |
| 203 | av_samples_set_silence(audio_data, 0, nb_samples, nb_channels, sample_fmt); |
| 204 | |
| 205 | #if FF_API_SAMPLES_UTILS_RETURN_ZERO |
| 206 | return 0; |
| 207 | #else |
| 208 | return size; |
| 209 | #endif |
| 210 | } |
| 211 | |
| 212 | int av_samples_alloc_array_and_samples(uint8_t ***audio_data, int *linesize, int nb_channels, |
| 213 | int nb_samples, enum AVSampleFormat sample_fmt, int align) |
| 214 | { |
| 215 | int ret, nb_planes = av_sample_fmt_is_planar(sample_fmt) ? nb_channels : 1; |
| 216 | |
| 217 | *audio_data = av_calloc(nb_planes, sizeof(**audio_data)); |
| 218 | if (!*audio_data) |
| 219 | return AVERROR(ENOMEM); |
| 220 | ret = av_samples_alloc(*audio_data, linesize, nb_channels, |
| 221 | nb_samples, sample_fmt, align); |
| 222 | if (ret < 0) |
| 223 | av_freep(audio_data); |
| 224 | return ret; |
| 225 | } |
| 226 | |
| 227 | int av_samples_copy(uint8_t **dst, uint8_t * const *src, int dst_offset, |
| 228 | int src_offset, int nb_samples, int nb_channels, |
| 229 | enum AVSampleFormat sample_fmt) |
| 230 | { |
| 231 | int planar = av_sample_fmt_is_planar(sample_fmt); |
| 232 | int planes = planar ? nb_channels : 1; |
| 233 | int block_align = av_get_bytes_per_sample(sample_fmt) * (planar ? 1 : nb_channels); |
| 234 | int data_size = nb_samples * block_align; |
| 235 | int i; |
| 236 | |
| 237 | dst_offset *= block_align; |
| 238 | src_offset *= block_align; |
| 239 | |
| 240 | if((dst[0] < src[0] ? src[0] - dst[0] : dst[0] - src[0]) >= data_size) { |
| 241 | for (i = 0; i < planes; i++) |
| 242 | memcpy(dst[i] + dst_offset, src[i] + src_offset, data_size); |
| 243 | } else { |
| 244 | for (i = 0; i < planes; i++) |
| 245 | memmove(dst[i] + dst_offset, src[i] + src_offset, data_size); |
| 246 | } |
| 247 | |
| 248 | return 0; |
| 249 | } |
| 250 | |
| 251 | int av_samples_set_silence(uint8_t **audio_data, int offset, int nb_samples, |
| 252 | int nb_channels, enum AVSampleFormat sample_fmt) |
| 253 | { |
| 254 | int planar = av_sample_fmt_is_planar(sample_fmt); |
| 255 | int planes = planar ? nb_channels : 1; |
| 256 | int block_align = av_get_bytes_per_sample(sample_fmt) * (planar ? 1 : nb_channels); |
| 257 | int data_size = nb_samples * block_align; |
| 258 | int fill_char = (sample_fmt == AV_SAMPLE_FMT_U8 || |
| 259 | sample_fmt == AV_SAMPLE_FMT_U8P) ? 0x80 : 0x00; |
| 260 | int i; |
| 261 | |
| 262 | offset *= block_align; |
| 263 | |
| 264 | for (i = 0; i < planes; i++) |
| 265 | memset(audio_data[i] + offset, fill_char, data_size); |
| 266 | |
| 267 | return 0; |
| 268 | } |