Commit | Line | Data |
---|---|---|
2ba45a60 DM |
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 | ||
2ba45a60 DM |
110 | int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt) |
111 | { | |
112 | if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB) | |
113 | return 0; | |
114 | return sample_fmt_info[sample_fmt].planar; | |
115 | } | |
116 | ||
117 | int av_samples_get_buffer_size(int *linesize, int nb_channels, int nb_samples, | |
118 | enum AVSampleFormat sample_fmt, int align) | |
119 | { | |
120 | int line_size; | |
121 | int sample_size = av_get_bytes_per_sample(sample_fmt); | |
122 | int planar = av_sample_fmt_is_planar(sample_fmt); | |
123 | ||
124 | /* validate parameter ranges */ | |
125 | if (!sample_size || nb_samples <= 0 || nb_channels <= 0) | |
126 | return AVERROR(EINVAL); | |
127 | ||
128 | /* auto-select alignment if not specified */ | |
129 | if (!align) { | |
130 | if (nb_samples > INT_MAX - 31) | |
131 | return AVERROR(EINVAL); | |
132 | align = 1; | |
133 | nb_samples = FFALIGN(nb_samples, 32); | |
134 | } | |
135 | ||
136 | /* check for integer overflow */ | |
137 | if (nb_channels > INT_MAX / align || | |
138 | (int64_t)nb_channels * nb_samples > (INT_MAX - (align * nb_channels)) / sample_size) | |
139 | return AVERROR(EINVAL); | |
140 | ||
141 | line_size = planar ? FFALIGN(nb_samples * sample_size, align) : | |
142 | FFALIGN(nb_samples * sample_size * nb_channels, align); | |
143 | if (linesize) | |
144 | *linesize = line_size; | |
145 | ||
146 | return planar ? line_size * nb_channels : line_size; | |
147 | } | |
148 | ||
149 | int av_samples_fill_arrays(uint8_t **audio_data, int *linesize, | |
150 | const uint8_t *buf, int nb_channels, int nb_samples, | |
151 | enum AVSampleFormat sample_fmt, int align) | |
152 | { | |
153 | int ch, planar, buf_size, line_size; | |
154 | ||
155 | planar = av_sample_fmt_is_planar(sample_fmt); | |
156 | buf_size = av_samples_get_buffer_size(&line_size, nb_channels, nb_samples, | |
157 | sample_fmt, align); | |
158 | if (buf_size < 0) | |
159 | return buf_size; | |
160 | ||
161 | audio_data[0] = (uint8_t *)buf; | |
162 | for (ch = 1; planar && ch < nb_channels; ch++) | |
163 | audio_data[ch] = audio_data[ch-1] + line_size; | |
164 | ||
165 | if (linesize) | |
166 | *linesize = line_size; | |
167 | ||
2ba45a60 | 168 | return buf_size; |
2ba45a60 DM |
169 | } |
170 | ||
171 | int av_samples_alloc(uint8_t **audio_data, int *linesize, int nb_channels, | |
172 | int nb_samples, enum AVSampleFormat sample_fmt, int align) | |
173 | { | |
174 | uint8_t *buf; | |
175 | int size = av_samples_get_buffer_size(NULL, nb_channels, nb_samples, | |
176 | sample_fmt, align); | |
177 | if (size < 0) | |
178 | return size; | |
179 | ||
180 | buf = av_malloc(size); | |
181 | if (!buf) | |
182 | return AVERROR(ENOMEM); | |
183 | ||
184 | size = av_samples_fill_arrays(audio_data, linesize, buf, nb_channels, | |
185 | nb_samples, sample_fmt, align); | |
186 | if (size < 0) { | |
187 | av_free(buf); | |
188 | return size; | |
189 | } | |
190 | ||
191 | av_samples_set_silence(audio_data, 0, nb_samples, nb_channels, sample_fmt); | |
192 | ||
2ba45a60 | 193 | return size; |
2ba45a60 DM |
194 | } |
195 | ||
196 | int av_samples_alloc_array_and_samples(uint8_t ***audio_data, int *linesize, int nb_channels, | |
197 | int nb_samples, enum AVSampleFormat sample_fmt, int align) | |
198 | { | |
199 | int ret, nb_planes = av_sample_fmt_is_planar(sample_fmt) ? nb_channels : 1; | |
200 | ||
201 | *audio_data = av_calloc(nb_planes, sizeof(**audio_data)); | |
202 | if (!*audio_data) | |
203 | return AVERROR(ENOMEM); | |
204 | ret = av_samples_alloc(*audio_data, linesize, nb_channels, | |
205 | nb_samples, sample_fmt, align); | |
206 | if (ret < 0) | |
207 | av_freep(audio_data); | |
208 | return ret; | |
209 | } | |
210 | ||
211 | int av_samples_copy(uint8_t **dst, uint8_t * const *src, int dst_offset, | |
212 | int src_offset, int nb_samples, int nb_channels, | |
213 | enum AVSampleFormat sample_fmt) | |
214 | { | |
215 | int planar = av_sample_fmt_is_planar(sample_fmt); | |
216 | int planes = planar ? nb_channels : 1; | |
217 | int block_align = av_get_bytes_per_sample(sample_fmt) * (planar ? 1 : nb_channels); | |
218 | int data_size = nb_samples * block_align; | |
219 | int i; | |
220 | ||
221 | dst_offset *= block_align; | |
222 | src_offset *= block_align; | |
223 | ||
224 | if((dst[0] < src[0] ? src[0] - dst[0] : dst[0] - src[0]) >= data_size) { | |
225 | for (i = 0; i < planes; i++) | |
226 | memcpy(dst[i] + dst_offset, src[i] + src_offset, data_size); | |
227 | } else { | |
228 | for (i = 0; i < planes; i++) | |
229 | memmove(dst[i] + dst_offset, src[i] + src_offset, data_size); | |
230 | } | |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
235 | int av_samples_set_silence(uint8_t **audio_data, int offset, int nb_samples, | |
236 | int nb_channels, enum AVSampleFormat sample_fmt) | |
237 | { | |
238 | int planar = av_sample_fmt_is_planar(sample_fmt); | |
239 | int planes = planar ? nb_channels : 1; | |
240 | int block_align = av_get_bytes_per_sample(sample_fmt) * (planar ? 1 : nb_channels); | |
241 | int data_size = nb_samples * block_align; | |
242 | int fill_char = (sample_fmt == AV_SAMPLE_FMT_U8 || | |
243 | sample_fmt == AV_SAMPLE_FMT_U8P) ? 0x80 : 0x00; | |
244 | int i; | |
245 | ||
246 | offset *= block_align; | |
247 | ||
248 | for (i = 0; i < planes; i++) | |
249 | memset(audio_data[i] + offset, fill_char, data_size); | |
250 | ||
251 | return 0; | |
252 | } |