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;
283 ctx->
x = (ctx->
x << 8) | *ctx->
in_buf++;
305 if (ctx->
t > ctx->
x) {
307 while (ctx->
t > pAllowable[ctx->
j])
336 while (pAllowable[ctx->
j - 1] >= z)
345 ctx->
diff =
FFMIN(z - ctx->
x, z - pAllowable[ctx->
j - 1]);
364 if (ctx->
err || n >= ELS_EXPGOLOMB_LEN) {
386 for (i = 0, r = 0, bit = 0; i < n; i++) {
419 return (1 << n) - 1 +
r;
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Entropy Logarithmic-Scale binary arithmetic coder.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
#define ELS_EXPGOLOMB_LEN
static const uint32_t els_exp_tab[ELS_JOTS_PER_BYTE *4+1]
#define AVERROR_EOF
End of file.
#define ELS_JOTS_PER_BYTE
void ff_els_decoder_init(ElsDecCtx *ctx, const uint8_t *in, size_t data_size)
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
Libavcodec external API header.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_RB24
ElsRungNode * rem_rung_list
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
static int els_import_byte(ElsDecCtx *ctx)
unsigned ff_els_decode_unsigned(ElsDecCtx *ctx, ElsUnsignedRung *ur)
common internal and external API header
#define bit(string, value)
void ff_els_decoder_uninit(ElsUnsignedRung *rung)
int ff_els_decode_bit(ElsDecCtx *ctx, uint8_t *rung)
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
uint8_t prefix_rung[ELS_EXPGOLOMB_LEN+1]