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4349 | Serge | 1 | /* |
2 | * This file is part of FFmpeg. |
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3 | * |
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4 | * FFmpeg is free software; you can redistribute it and/or |
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5 | * modify it under the terms of the GNU Lesser General Public |
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6 | * License as published by the Free Software Foundation; either |
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7 | * version 2.1 of the License, or (at your option) any later version. |
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8 | * |
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9 | * FFmpeg is distributed in the hope that it will be useful, |
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10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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12 | * Lesser General Public License for more details. |
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13 | * |
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14 | * You should have received a copy of the GNU Lesser General Public |
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15 | * License along with FFmpeg; if not, write to the Free Software |
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16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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17 | */ |
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18 | |||
19 | #include "common.h" |
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20 | #include "samplefmt.h" |
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21 | |||
22 | #include |
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23 | #include |
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24 | #include |
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25 | |||
26 | typedef struct SampleFmtInfo { |
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27 | char name[8]; |
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28 | int bits; |
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29 | int planar; |
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30 | enum AVSampleFormat altform; ///< planar<->packed alternative form |
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31 | } SampleFmtInfo; |
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32 | |||
33 | /** this table gives more information about formats */ |
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34 | static const SampleFmtInfo sample_fmt_info[AV_SAMPLE_FMT_NB] = { |
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35 | [AV_SAMPLE_FMT_U8] = { .name = "u8", .bits = 8, .planar = 0, .altform = AV_SAMPLE_FMT_U8P }, |
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36 | [AV_SAMPLE_FMT_S16] = { .name = "s16", .bits = 16, .planar = 0, .altform = AV_SAMPLE_FMT_S16P }, |
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37 | [AV_SAMPLE_FMT_S32] = { .name = "s32", .bits = 32, .planar = 0, .altform = AV_SAMPLE_FMT_S32P }, |
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38 | [AV_SAMPLE_FMT_FLT] = { .name = "flt", .bits = 32, .planar = 0, .altform = AV_SAMPLE_FMT_FLTP }, |
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39 | [AV_SAMPLE_FMT_DBL] = { .name = "dbl", .bits = 64, .planar = 0, .altform = AV_SAMPLE_FMT_DBLP }, |
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40 | [AV_SAMPLE_FMT_U8P] = { .name = "u8p", .bits = 8, .planar = 1, .altform = AV_SAMPLE_FMT_U8 }, |
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41 | [AV_SAMPLE_FMT_S16P] = { .name = "s16p", .bits = 16, .planar = 1, .altform = AV_SAMPLE_FMT_S16 }, |
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42 | [AV_SAMPLE_FMT_S32P] = { .name = "s32p", .bits = 32, .planar = 1, .altform = AV_SAMPLE_FMT_S32 }, |
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43 | [AV_SAMPLE_FMT_FLTP] = { .name = "fltp", .bits = 32, .planar = 1, .altform = AV_SAMPLE_FMT_FLT }, |
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44 | [AV_SAMPLE_FMT_DBLP] = { .name = "dblp", .bits = 64, .planar = 1, .altform = AV_SAMPLE_FMT_DBL }, |
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45 | }; |
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46 | |||
47 | const char *av_get_sample_fmt_name(enum AVSampleFormat sample_fmt) |
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48 | { |
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49 | if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB) |
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50 | return NULL; |
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51 | return sample_fmt_info[sample_fmt].name; |
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52 | } |
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53 | |||
54 | enum AVSampleFormat av_get_sample_fmt(const char *name) |
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55 | { |
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56 | int i; |
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57 | |||
58 | for (i = 0; i < AV_SAMPLE_FMT_NB; i++) |
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59 | if (!strcmp(sample_fmt_info[i].name, name)) |
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60 | return i; |
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61 | return AV_SAMPLE_FMT_NONE; |
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62 | } |
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63 | |||
64 | enum AVSampleFormat av_get_alt_sample_fmt(enum AVSampleFormat sample_fmt, int planar) |
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65 | { |
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66 | if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB) |
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67 | return AV_SAMPLE_FMT_NONE; |
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68 | if (sample_fmt_info[sample_fmt].planar == planar) |
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69 | return sample_fmt; |
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70 | return sample_fmt_info[sample_fmt].altform; |
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71 | } |
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72 | |||
73 | enum AVSampleFormat av_get_packed_sample_fmt(enum AVSampleFormat sample_fmt) |
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74 | { |
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75 | if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB) |
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76 | return AV_SAMPLE_FMT_NONE; |
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77 | if (sample_fmt_info[sample_fmt].planar) |
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78 | return sample_fmt_info[sample_fmt].altform; |
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79 | return sample_fmt; |
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80 | } |
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81 | |||
82 | enum AVSampleFormat av_get_planar_sample_fmt(enum AVSampleFormat sample_fmt) |
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83 | { |
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84 | if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB) |
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85 | return AV_SAMPLE_FMT_NONE; |
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86 | if (sample_fmt_info[sample_fmt].planar) |
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87 | return sample_fmt; |
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88 | return sample_fmt_info[sample_fmt].altform; |
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89 | } |
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90 | |||
91 | char *av_get_sample_fmt_string (char *buf, int buf_size, enum AVSampleFormat sample_fmt) |
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92 | { |
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93 | /* print header */ |
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94 | if (sample_fmt < 0) |
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95 | snprintf(buf, buf_size, "name " " depth"); |
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96 | else if (sample_fmt < AV_SAMPLE_FMT_NB) { |
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97 | SampleFmtInfo info = sample_fmt_info[sample_fmt]; |
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98 | snprintf (buf, buf_size, "%-6s" " %2d ", info.name, info.bits); |
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99 | } |
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100 | |||
101 | return buf; |
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102 | } |
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103 | |||
104 | int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt) |
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105 | { |
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106 | return sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB ? |
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107 | |||
108 | } |
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109 | |||
110 | #if FF_API_GET_BITS_PER_SAMPLE_FMT |
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111 | int av_get_bits_per_sample_fmt(enum AVSampleFormat sample_fmt) |
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112 | { |
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113 | return sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB ? |
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114 | |||
115 | } |
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116 | #endif |
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117 | |||
118 | int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt) |
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119 | { |
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120 | if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB) |
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121 | return 0; |
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122 | return sample_fmt_info[sample_fmt].planar; |
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123 | } |
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124 | |||
125 | int av_samples_get_buffer_size(int *linesize, int nb_channels, int nb_samples, |
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126 | enum AVSampleFormat sample_fmt, int align) |
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127 | { |
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128 | int line_size; |
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129 | int sample_size = av_get_bytes_per_sample(sample_fmt); |
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130 | int planar = av_sample_fmt_is_planar(sample_fmt); |
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131 | |||
132 | /* validate parameter ranges */ |
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133 | if (!sample_size || nb_samples <= 0 || nb_channels <= 0) |
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134 | return AVERROR(EINVAL); |
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135 | |||
136 | /* auto-select alignment if not specified */ |
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137 | if (!align) { |
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138 | align = 1; |
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139 | nb_samples = FFALIGN(nb_samples, 32); |
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140 | } |
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141 | |||
142 | /* check for integer overflow */ |
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143 | if (nb_channels > INT_MAX / align || |
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144 | (int64_t)nb_channels * nb_samples > (INT_MAX - (align * nb_channels)) / sample_size) |
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145 | return AVERROR(EINVAL); |
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146 | |||
147 | line_size = planar ? FFALIGN(nb_samples * sample_size, align) : |
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148 | FFALIGN(nb_samples * sample_size * nb_channels, align); |
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149 | if (linesize) |
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150 | *linesize = line_size; |
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151 | |||
152 | return planar ? line_size * nb_channels : line_size; |
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153 | } |
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154 | |||
155 | int av_samples_fill_arrays(uint8_t **audio_data, int *linesize, |
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156 | const uint8_t *buf, int nb_channels, int nb_samples, |
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157 | enum AVSampleFormat sample_fmt, int align) |
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158 | { |
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159 | int ch, planar, buf_size, line_size; |
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160 | |||
161 | planar = av_sample_fmt_is_planar(sample_fmt); |
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162 | buf_size = av_samples_get_buffer_size(&line_size, nb_channels, nb_samples, |
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163 | sample_fmt, align); |
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164 | if (buf_size < 0) |
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165 | return buf_size; |
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166 | |||
167 | audio_data[0] = (uint8_t *)buf; |
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168 | for (ch = 1; planar && ch < nb_channels; ch++) |
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169 | audio_data[ch] = audio_data[ch-1] + line_size; |
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170 | |||
171 | if (linesize) |
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172 | *linesize = line_size; |
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173 | |||
174 | #if FF_API_SAMPLES_UTILS_RETURN_ZERO |
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175 | return 0; |
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176 | #else |
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177 | return buf_size; |
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178 | #endif |
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179 | } |
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180 | |||
181 | int av_samples_alloc(uint8_t **audio_data, int *linesize, int nb_channels, |
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182 | int nb_samples, enum AVSampleFormat sample_fmt, int align) |
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183 | { |
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184 | uint8_t *buf; |
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185 | int size = av_samples_get_buffer_size(NULL, nb_channels, nb_samples, |
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186 | sample_fmt, align); |
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187 | if (size < 0) |
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188 | return size; |
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189 | |||
190 | buf = av_malloc(size); |
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191 | if (!buf) |
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192 | return AVERROR(ENOMEM); |
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193 | |||
194 | size = av_samples_fill_arrays(audio_data, linesize, buf, nb_channels, |
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195 | nb_samples, sample_fmt, align); |
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196 | if (size < 0) { |
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197 | av_free(buf); |
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198 | return size; |
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199 | } |
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200 | |||
201 | av_samples_set_silence(audio_data, 0, nb_samples, nb_channels, sample_fmt); |
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202 | |||
203 | #if FF_API_SAMPLES_UTILS_RETURN_ZERO |
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204 | return 0; |
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205 | #else |
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206 | return size; |
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207 | #endif |
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208 | } |
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209 | |||
210 | int av_samples_alloc_array_and_samples(uint8_t ***audio_data, int *linesize, int nb_channels, |
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211 | int nb_samples, enum AVSampleFormat sample_fmt, int align) |
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212 | { |
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213 | int ret, nb_planes = av_sample_fmt_is_planar(sample_fmt) ? nb_channels : 1; |
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214 | |||
215 | *audio_data = av_calloc(nb_planes, sizeof(**audio_data)); |
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216 | if (!*audio_data) |
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217 | return AVERROR(ENOMEM); |
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218 | ret = av_samples_alloc(*audio_data, linesize, nb_channels, |
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219 | nb_samples, sample_fmt, align); |
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220 | if (ret < 0) |
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221 | av_freep(audio_data); |
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222 | return ret; |
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223 | } |
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224 | |||
225 | int av_samples_copy(uint8_t **dst, uint8_t * const *src, int dst_offset, |
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226 | int src_offset, int nb_samples, int nb_channels, |
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227 | enum AVSampleFormat sample_fmt) |
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228 | { |
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229 | int planar = av_sample_fmt_is_planar(sample_fmt); |
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230 | int planes = planar ? nb_channels : 1; |
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231 | int block_align = av_get_bytes_per_sample(sample_fmt) * (planar ? 1 : nb_channels); |
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232 | int data_size = nb_samples * block_align; |
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233 | int i; |
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234 | |||
235 | dst_offset *= block_align; |
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236 | src_offset *= block_align; |
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237 | |||
238 | if((dst[0] < src[0] ? src[0] - dst[0] : dst[0] - src[0]) >= data_size) { |
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239 | for (i = 0; i < planes; i++) |
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240 | memcpy(dst[i] + dst_offset, src[i] + src_offset, data_size); |
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241 | } else { |
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242 | for (i = 0; i < planes; i++) |
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243 | memmove(dst[i] + dst_offset, src[i] + src_offset, data_size); |
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244 | } |
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245 | |||
246 | return 0; |
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247 | } |
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248 | |||
249 | int av_samples_set_silence(uint8_t **audio_data, int offset, int nb_samples, |
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250 | int nb_channels, enum AVSampleFormat sample_fmt) |
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251 | { |
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252 | int planar = av_sample_fmt_is_planar(sample_fmt); |
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253 | int planes = planar ? nb_channels : 1; |
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254 | int block_align = av_get_bytes_per_sample(sample_fmt) * (planar ? 1 : nb_channels); |
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255 | int data_size = nb_samples * block_align; |
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256 | int fill_char = (sample_fmt == AV_SAMPLE_FMT_U8 || |
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257 | sample_fmt == AV_SAMPLE_FMT_U8P) ? 0x80 : 0x00; |
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258 | int i; |
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259 | |||
260 | offset *= block_align; |
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261 | |||
262 | for (i = 0; i < planes; i++) |
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263 | memset(audio_data[i] + offset, fill_char, data_size); |
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264 | |||
265 | return 0; |
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266 | }>>>>>>>>>=>=>>>>>>>>>>>->> |