38 #define ELS_JOTS_PER_BYTE 36
39 #define ELS_MAX (1 << 24)
40 #define RUNG_SPACE (64 * sizeof(ElsRungNode))
91 { -2, -13, 152, 164 },
129 { -1, -30, 78, 100 },
131 { -1, -29, 80, 102 },
133 { -1, -29, 82, 104 },
135 { -1, -28, 84, 104 },
137 { -1, -28, 86, 108 },
139 { -1, -27, 88, 108 },
141 { -1, -27, 90, 112 },
143 { -1, -26, 92, 112 },
145 { -1, -26, 94, 114 },
147 { -1, -25, 96, 116 },
148 { -1, -20, 101, 83 },
149 { -1, -25, 98, 118 },
150 { -1, -21, 103, 83 },
151 { -1, -24, 100, 120 },
152 { -1, -21, 105, 85 },
153 { -1, -24, 102, 122 },
154 { -1, -22, 107, 87 },
155 { -1, -23, 104, 124 },
156 { -1, -22, 109, 89 },
157 { -1, -23, 106, 126 },
158 { -1, -22, 111, 91 },
159 { -1, -22, 108, 128 },
160 { -1, -23, 113, 93 },
161 { -1, -22, 110, 130 },
162 { -1, -23, 115, 95 },
163 { -1, -22, 112, 132 },
164 { -1, -24, 117, 97 },
165 { -1, -21, 114, 134 },
166 { -1, -24, 119, 99 },
167 { -1, -21, 116, 136 },
168 { -1, -25, 121, 101 },
169 { -1, -20, 118, 136 },
170 { -1, -25, 123, 103 },
171 { -1, -20, 120, 138 },
172 { -1, -26, 125, 105 },
173 { -1, -20, 122, 140 },
174 { -1, -26, 127, 107 },
175 { -1, -19, 124, 142 },
176 { -1, -27, 129, 107 },
177 { -1, -19, 126, 144 },
178 { -1, -27, 131, 111 },
179 { -1, -18, 128, 146 },
180 { -1, -28, 133, 111 },
181 { -1, -18, 130, 146 },
182 { -1, -28, 135, 115 },
183 { -1, -18, 132, 148 },
184 { -1, -29, 137, 115 },
185 { -1, -17, 134, 150 },
186 { -1, -29, 139, 117 },
187 { -1, -17, 136, 152 },
188 { -1, -30, 141, 119 },
189 { -1, -16, 138, 152 },
190 { -1, -31, 143, 121 },
191 { -1, -16, 140, 154 },
192 { -1, -31, 145, 123 },
193 { -1, -15, 142, 156 },
194 { -1, -32, 147, 125 },
195 { -1, -15, 144, 158 },
196 { -1, -33, 149, 127 },
197 { -1, -15, 146, 158 },
198 { -1, -34, 151, 129 },
199 { -1, -14, 148, 160 },
200 { -1, -35, 153, 131 },
201 { -1, -14, 150, 160 },
202 { -1, -36, 155, 133 },
203 { -2, -13, 152, 162 },
204 { -1, -37, 157, 135 },
205 { -2, -12, 154, 164 },
206 { -1, -39, 159, 137 },
207 { -2, -12, 156, 164 },
208 { -1, -41, 161, 139 },
209 { -2, -11, 158, 166 },
210 { -1, -43, 163, 141 },
211 { -2, -10, 160, 166 },
212 { -1, -46, 165, 143 },
213 { -3, -9, 162, 168 },
214 { -1, -51, 167, 143 },
215 { -3, -8, 164, 170 },
216 { -1, -61, 169, 145 },
217 { -4, -7, 166, 170 },
218 { -1, -72, 169, 145 },
220 { 0, -108, 171, 171 },
221 { 0, -108, 172, 172 },
222 { -6, -5, 173, 173 },
226 0, 0, 0, 0, 0, 0, 0, 0,
227 0, 0, 0, 0, 0, 0, 0, 0,
228 0, 0, 0, 0, 0, 0, 0, 0,
229 0, 0, 0, 0, 0, 0, 0, 0,
230 0, 0, 0, 0, 1, 1, 1, 1,
231 1, 2, 2, 2, 3, 4, 4, 5,
232 6, 7, 8, 10, 11, 13, 16, 18,
233 21, 25, 29, 34, 40, 47, 54, 64,
234 74, 87, 101, 118, 138, 161, 188, 219,
235 256, 298, 348, 406, 474, 552, 645, 752,
236 877, 1024, 1194, 1393, 1625, 1896, 2211, 2580,
237 3010, 3511, 4096, 4778, 5573, 6501, 7584, 8847,
238 10321, 12040, 14045, 16384, 19112, 22295, 26007, 30339,
239 35391, 41285, 48160, 56180, 65536, 76288, 89088, 103936,
240 121344, 141312, 165120, 192512, 224512, 262144, 305664, 356608,
241 416000, 485376, 566016, 660480, 770560, 898816, 1048576, 1223168,
242 1426688, 1664256, 1941504, 2264832, 2642176, 3082240, 3595520, 4194304,
243 4892672, 5707520, 6657792, 7766784, 9060096, 10568960, 12328960, 14382080,
252 if (data_size >= 3) {
255 }
else if (data_size == 2) {
263 ctx->in_buf =
in + nbytes;
264 ctx->data_size = data_size - nbytes;
279 if (!
ctx->data_size) {
307 while (
ctx->t > pAllowable[
ctx->j])
336 while (pAllowable[
ctx->j - 1] >= z)
386 for (
i = 0,
r = 0,
bit = 0;
i < n;
i++) {
419 return (1 << n) - 1 +
r;
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Libavcodec external API header.
#define bit(string, value)
common internal and external API header
#define ELS_JOTS_PER_BYTE
void ff_els_decoder_init(ElsDecCtx *ctx, const uint8_t *in, size_t data_size)
int ff_els_decode_bit(ElsDecCtx *ctx, uint8_t *rung)
static const uint32_t els_exp_tab[ELS_JOTS_PER_BYTE *4+1]
void ff_els_decoder_uninit(ElsUnsignedRung *rung)
static int els_import_byte(ElsDecCtx *ctx)
unsigned ff_els_decode_unsigned(ElsDecCtx *ctx, ElsUnsignedRung *ur)
Entropy Logarithmic-Scale binary arithmetic coder.
#define ELS_EXPGOLOMB_LEN
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
#define AVERROR_EOF
End of file.
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
ElsRungNode * rem_rung_list
uint8_t prefix_rung[ELS_EXPGOLOMB_LEN+1]