28 #define BITSTREAM_READER_LE 42 #define V_MAX_VLCS (1 << 16) 43 #define V_MAX_PARTITIONS (1 << 20) 57 struct vorbis_context_s;
83 int16_t subclass_books[16][8];
121 typedef struct vorbis_context_s {
136 uint32_t blocksize[2];
157 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x)) 159 static const char idx_err_str[] =
"Index value %d out of range (0 - %d) for %s at %s:%i\n";
160 #define VALIDATE_INDEX(idx, limit) \ 162 av_log(vc->avctx, AV_LOG_ERROR,\ 164 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\ 165 return AVERROR_INVALIDDATA;\ 167 #define GET_VALIDATED_INDEX(idx, bits, limit) \ 169 idx = get_bits(gb, bits);\ 170 VALIDATE_INDEX(idx, limit)\ 175 double mant = val & 0x1fffff;
176 long exp = (val & 0x7fe00000
L) >> 21;
177 if (val & 0x80000000)
179 return ldexp(mant, exp - 20 - 768);
234 uint32_t *tmp_vlc_codes =
NULL;
236 uint16_t *codebook_multiplicands =
NULL;
248 !tmp_vlc_bits || !tmp_vlc_codes || !codebook_multiplicands) {
255 unsigned ordered, t, entries, used_entries = 0;
261 " %u. Codebook setup data corrupt.\n", cb);
269 " %u. Codebook's dimension is invalid (%d).\n",
277 " %u. Codebook has too many entries (%u).\n",
285 av_dlog(
NULL,
" codebook_dimensions %d, codebook_entries %u\n",
298 for (ce = 0; ce < entries; ++ce) {
301 tmp_vlc_bits[ce] =
get_bits(gb, 5) + 1;
304 tmp_vlc_bits[ce] = 0;
309 used_entries = entries;
310 for (ce = 0; ce < entries; ++ce)
311 tmp_vlc_bits[ce] =
get_bits(gb, 5) + 1;
314 unsigned current_entry = 0;
315 unsigned current_length =
get_bits(gb, 5) + 1;
317 av_dlog(
NULL,
" ordered, current length: %u\n", current_length);
319 used_entries = entries;
320 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
329 for (i = current_entry; i < number+current_entry; ++i)
330 if (i < used_entries)
331 tmp_vlc_bits[i] = current_length;
333 current_entry+=number;
335 if (current_entry>used_entries) {
355 unsigned codebook_value_bits =
get_bits(gb, 4) + 1;
356 unsigned codebook_sequence_p =
get_bits1(gb);
358 av_dlog(
NULL,
" We expect %d numbers for building the codevectors. \n",
359 codebook_lookup_values);
361 codebook_delta_value, codebook_minimum_value);
363 for (i = 0; i < codebook_lookup_values; ++i) {
364 codebook_multiplicands[i] =
get_bits(gb, codebook_value_bits);
366 av_dlog(
NULL,
" multiplicands*delta+minmum : %e \n",
367 (
float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
368 av_dlog(
NULL,
" multiplicand %u\n", codebook_multiplicands[i]);
376 for (j = 0, i = 0; i < entries; ++i) {
379 if (tmp_vlc_bits[i]) {
381 unsigned lookup_offset = i;
385 for (k = 0; k <
dim; ++k) {
386 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
387 codebook_setup->
codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
388 if (codebook_sequence_p)
390 lookup_offset/=codebook_lookup_values;
392 tmp_vlc_bits[j] = tmp_vlc_bits[i];
394 av_dlog(vc->
avctx,
"real lookup offset %u, vector: ", j);
395 for (k = 0; k <
dim; ++k)
403 if (j != used_entries) {
408 entries = used_entries;
422 for (t = 0; t < entries; ++t)
423 if (tmp_vlc_bits[t] >= codebook_setup->
maxdepth)
424 codebook_setup->
maxdepth = tmp_vlc_bits[t];
434 entries, tmp_vlc_bits,
sizeof(*tmp_vlc_bits),
435 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
436 sizeof(*tmp_vlc_codes),
sizeof(*tmp_vlc_codes),
445 av_free(codebook_multiplicands);
452 av_free(codebook_multiplicands);
461 unsigned i, vorbis_time_count =
get_bits(gb, 6) + 1;
463 for (i = 0; i < vorbis_time_count; ++i) {
464 unsigned vorbis_tdtransform =
get_bits(gb, 16);
466 av_dlog(
NULL,
" Vorbis time domain transform %u: %u\n",
467 vorbis_time_count, vorbis_tdtransform);
469 if (vorbis_tdtransform) {
503 int maximum_class = -1;
504 unsigned rangebits, rangemax, floor1_values = 2;
518 av_dlog(
NULL,
" %d. floor %d partition class %d \n",
523 av_dlog(
NULL,
" maximum class %d \n", maximum_class);
525 for (j = 0; j <= maximum_class; ++j) {
529 av_dlog(
NULL,
" %d floor %d class dim: %d subclasses %d \n", i, j,
561 rangemax = (1 << rangebits);
564 "Floor value is too large for blocksize: %u (%"PRIu32
")\n",
575 av_dlog(
NULL,
" %u. floor1 Y coord. %d\n", floor1_values,
587 unsigned max_codebook_dim = 0;
604 "Floor 0 bark map size is 0.\n");
684 unsigned high_bits, low_bits;
694 if (res_setup->
begin>res_setup->
end ||
698 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16
", %"PRIu32
", %"PRIu32
", %u, %"PRIu32
"\n",
715 av_dlog(
NULL,
" begin %d end %d part.size %d classif.s %d classbook %d \n",
724 cascade[j] = (high_bits << 3) + low_bits;
731 for (k = 0; k < 8; ++k) {
732 if (cascade[j]&(1 << k)) {
735 av_dlog(
NULL,
" %u class cascade depth %u book: %d\n",
736 j, k, res_setup->
books[j][k]);
741 res_setup->
books[j][k] = -1;
767 av_log(vc->
avctx,
AV_LOG_ERROR,
"Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
781 sizeof(*mapping_setup->
angle));
801 if (mapping_setup->
submaps>1) {
803 sizeof(*mapping_setup->
mux));
804 if (!mapping_setup->
mux)
811 for (j = 0; j < mapping_setup->
submaps; ++j) {
816 av_dlog(
NULL,
" %u mapping %u submap : floor %d, residue %d\n", i, j,
834 for (blockflag = 0; blockflag < 2; ++blockflag) {
836 floors[floor_number].
data.
t0.
map[blockflag] =
838 if (!floors[floor_number].
data.t0.map[blockflag])
841 map = floors[floor_number].
data.
t0.
map[blockflag];
842 vf = &floors[floor_number].
data.
t0;
844 for (idx = 0; idx < n; ++idx) {
845 map[idx] = floor(
BARK((vf->rate * idx) / (2.0f * n)) *
846 (vf->bark_map_size /
BARK(vf->rate / 2.0f)));
847 if (vf->bark_map_size-1 < map[idx])
848 map[idx] = vf->bark_map_size - 1;
851 vf->map_size[blockflag] = n;
854 for (idx = 0; idx <= n; ++idx) {
855 av_dlog(
NULL,
"floor0 map: map at pos %d is %d\n", idx, map[idx]);
881 av_dlog(
NULL,
" %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
966 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
988 av_dlog(
NULL,
" vorbis version %d \n audio_channels %d \n audio_samplerate %d \n bitrate_max %d \n bitrate_nom %d \n bitrate_min %d \n blk_0 %d blk_1 %d \n ",
1032 if (hdr_type != 1) {
1044 if (hdr_type != 5) {
1074 float *lsp = vf->lsp;
1075 unsigned amplitude, book_idx;
1078 if (!vf->amplitude_bits)
1081 amplitude =
get_bits(&vc->
gb, vf->amplitude_bits);
1082 if (amplitude > 0) {
1084 unsigned idx, lsp_len = 0;
1088 if (book_idx >= vf->num_books) {
1092 av_dlog(
NULL,
"floor0 dec: booknumber: %u\n", book_idx);
1093 codebook = vc->
codebooks[vf->book_list[book_idx]];
1098 while (lsp_len<vf->order) {
1107 av_dlog(
NULL,
"floor0 dec: vector offset: %d\n", vec_off);
1109 for (idx = 0; idx < codebook.
dimensions; ++idx)
1110 lsp[lsp_len+idx] = codebook.
codevectors[vec_off+idx] + last;
1111 last = lsp[lsp_len+idx-1];
1118 for (idx = 0; idx < lsp_len; ++idx)
1119 av_dlog(
NULL,
"floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1125 int order = vf->order;
1126 float wstep = M_PI / vf->bark_map_size;
1128 for (i = 0; i < order; i++)
1129 lsp[i] = 2.0f * cos(lsp[i]);
1131 av_dlog(
NULL,
"floor0 synth: map_size = %"PRIu32
"; m = %d; wstep = %f\n",
1132 vf->map_size[blockflag], order, wstep);
1135 while (i < vf->map_size[blockflag]) {
1136 int j, iter_cond = vf->map[blockflag][i];
1139 float two_cos_w = 2.0f * cos(wstep * iter_cond);
1142 for (j = 0; j + 1 < order; j += 2) {
1143 q *= lsp[j] - two_cos_w;
1144 p *= lsp[j + 1] - two_cos_w;
1147 p *= p * (2.0f - two_cos_w);
1148 q *= q * (2.0f + two_cos_w);
1150 q *= two_cos_w-lsp[j];
1153 p *= p * (4.f - two_cos_w * two_cos_w);
1158 q = exp((((amplitude*vf->amplitude_offset) /
1159 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1160 - vf->amplitude_offset) * .11512925f);
1165 }
while (vf->map[blockflag][i] == iter_cond);
1183 uint16_t range_v[4] = { 256, 128, 86, 64 };
1184 unsigned range = range_v[vf->multiplier - 1];
1185 uint16_t floor1_Y[258];
1186 uint16_t floor1_Y_final[258];
1187 int floor1_flag[258];
1188 unsigned class, cdim, cbits, csub, cval, offset, i, j;
1189 int book, adx, ady, dy, off, predicted, err;
1200 av_dlog(
NULL,
"floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1203 for (i = 0; i < vf->partitions; ++i) {
1204 class = vf->partition_class[i];
1205 cdim = vf->class_dimensions[
class];
1206 cbits = vf->class_subclasses[
class];
1207 csub = (1 << cbits) - 1;
1216 for (j = 0; j < cdim; ++j) {
1217 book = vf->subclass_books[
class][cval & csub];
1219 av_dlog(
NULL,
"book %d Cbits %u cval %u bits:%d\n",
1222 cval = cval >> cbits;
1227 floor1_Y[offset+j] = 0;
1231 vf->list[offset+j].x, floor1_Y[offset+j]);
1240 floor1_Y_final[0] = floor1_Y[0];
1241 floor1_Y_final[1] = floor1_Y[1];
1243 for (i = 2; i < vf->x_list_dim; ++i) {
1244 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1246 low_neigh_offs = vf->list[i].low;
1247 high_neigh_offs = vf->list[i].high;
1248 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs];
1249 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1251 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1254 predicted = floor1_Y_final[low_neigh_offs] - off;
1256 predicted = floor1_Y_final[low_neigh_offs] + off;
1260 highroom = range-predicted;
1261 lowroom = predicted;
1262 if (highroom < lowroom) {
1263 room = highroom * 2;
1268 floor1_flag[low_neigh_offs] = 1;
1269 floor1_flag[high_neigh_offs] = 1;
1272 if (highroom > lowroom) {
1273 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1275 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1279 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1281 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1286 floor1_Y_final[i] = av_clip_uint16(predicted);
1289 av_dlog(
NULL,
" Decoded floor(%d) = %u / val %u\n",
1290 vf->list[i].x, floor1_Y_final[i], val);
1306 int partition_count)
1312 for (p = 0, j = 0; j < ch_used; ++j) {
1313 if (!do_not_decode[j]) {
1321 "Invalid vlc code decoding %d channel.", j);
1325 for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1326 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1328 if (i < vr->ptns_to_read)
1351 unsigned pass, ch_used, i, j, k, l;
1352 unsigned max_output = (ch - 1) * vlen;
1356 for (j = 1; j < ch; ++j)
1357 do_not_decode[0] &= do_not_decode[j];
1358 if (do_not_decode[0])
1361 max_output += vr->
end / ch;
1364 max_output += vr->
end;
1367 if (max_output > ch_left * vlen) {
1372 av_dlog(
NULL,
" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1375 int voffset, partition_count, j_times_ptns_to_read;
1377 voffset = vr->
begin;
1378 for (partition_count = 0; partition_count < ptns_to_read;) {
1380 int ret =
setup_classifs(vc, vr, do_not_decode, ch_used, partition_count);
1384 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1385 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1388 if (!do_not_decode[j]) {
1389 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1400 voffs = voffset+j*vlen;
1401 for (k = 0; k <
step; ++k) {
1403 for (l = 0; l <
dim; ++l)
1404 vec[voffs + k + l * step] += codebook.
codevectors[coffs + l];
1406 }
else if (vr_type == 1) {
1407 voffs = voffset + j * vlen;
1408 for (k = 0; k <
step; ++k) {
1410 for (l = 0; l <
dim; ++l, ++voffs) {
1413 av_dlog(
NULL,
" pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1414 pass, voffs, vec[voffs], codebook.
codevectors[coffs+l], coffs);
1417 }
else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) {
1418 voffs = voffset >> 1;
1421 for (k = 0; k <
step; ++k) {
1424 vec[voffs + k + vlen] += codebook.
codevectors[coffs + 1];
1426 }
else if (dim == 4) {
1427 for (k = 0; k <
step; ++k, voffs += 2) {
1430 vec[voffs + 1 ] += codebook.
codevectors[coffs + 2];
1431 vec[voffs + vlen ] += codebook.
codevectors[coffs + 1];
1432 vec[voffs + vlen + 1] += codebook.
codevectors[coffs + 3];
1435 for (k = 0; k <
step; ++k) {
1437 for (l = 0; l <
dim; l += 2, voffs++) {
1439 vec[voffs + vlen] += codebook.
codevectors[coffs + l + 1];
1441 av_dlog(
NULL,
" pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1442 pass, voffset / ch + (voffs % ch) * vlen,
1443 vec[voffset / ch + (voffs % ch) * vlen],
1448 }
else if (vr_type == 2) {
1449 unsigned voffs_div =
FASTDIV(voffset << 1, ch <<1);
1450 unsigned voffs_mod = voffset - voffs_div * ch;
1452 for (k = 0; k <
step; ++k) {
1454 for (l = 0; l <
dim; ++l) {
1455 vec[voffs_div + voffs_mod * vlen] +=
1458 av_dlog(
NULL,
" pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1459 pass, voffs_div + voffs_mod * vlen,
1460 vec[voffs_div + voffs_mod * vlen],
1463 if (++voffs_mod == ch) {
1472 j_times_ptns_to_read += ptns_to_read;
1485 float *vec,
unsigned vlen,
1490 else if (vr->
type == 1)
1492 else if (vr->
type == 0)
1503 for (i = 0; i < blocksize; i++) {
1506 ang[i] = mag[i] - ang[i];
1508 float temp = ang[i];
1516 float temp = ang[i];
1531 unsigned mode_number, blockflag, blocksize;
1538 unsigned res_num = 0;
1556 av_dlog(
NULL,
" Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1561 vlen = blocksize / 2;
1567 memset(ch_res_ptr, 0,
sizeof(
float) * vc->
audio_channels * vlen);
1569 memset(floor_ptr[i], 0, vlen *
sizeof(floor_ptr[0][0]));
1582 ret = floor->
decode(vc, &floor->
data, floor_ptr[i]);
1588 no_residue[i] = ret;
1594 if (!(no_residue[mapping->
magnitude[i]] & no_residue[mapping->
angle[i]])) {
1596 no_residue[mapping->
angle[i]] = 0;
1602 for (i = 0; i < mapping->
submaps; ++i) {
1608 if ((mapping->
submaps == 1) || (i == mapping->
mux[j])) {
1609 res_chan[j] = res_num;
1610 if (no_residue[j]) {
1611 do_not_decode[ch] = 1;
1613 do_not_decode[ch] = 0;
1630 ch_res_ptr += ch * vlen;
1649 mdct = &vc->
mdct[blockflag];
1653 vc->
fdsp.
vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1654 mdct->
imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1659 retlen = (blocksize + vc->
blocksize[previous_window]) / 4;
1664 float *saved = vc->
saved + j * bs1 / 4;
1665 float *ret = floor_ptr[j];
1666 float *buf = residue;
1667 const float *win = vc->
win[blockflag & previous_window];
1669 if (blockflag == previous_window) {
1671 }
else if (blockflag > previous_window) {
1673 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) *
sizeof(
float));
1675 memcpy(ret, saved, ((bs1 - bs0) / 4) *
sizeof(
float));
1678 memcpy(saved, buf + blocksize / 4, blocksize / 4 *
sizeof(
float));
1688 int *got_frame_ptr,
AVPacket *avpkt)
1691 int buf_size = avpkt->
size;
1695 float *channel_ptrs[255];
1729 av_dlog(
NULL,
"parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1755 sizeof(*vc->
saved));
vorbis_codebook * codebooks
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
struct vorbis_floor1_s vorbis_floor1
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n)
static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
This structure describes decoded (raw) audio or video data.
void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
int(* vorbis_floor_decode_func)(struct vorbis_context_s *, vorbis_floor_data *, float *)
static av_cold int vorbis_decode_close(AVCodecContext *avctx)
static const char idx_err_str[]
uint8_t class_subclasses[16]
static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc, vorbis_residue *vr, unsigned ch, uint8_t *do_not_decode, float *vec, unsigned vlen, unsigned ch_left, int vr_type)
uint32_t audio_samplerate
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
av_dlog(ac->avr, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
const uint32_t ff_inverse[257]
enum AVSampleFormat sample_fmt
audio sample format
static int vorbis_floor0_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec)
void(* vector_fmul)(float *dst, const float *src0, const float *src1, int len)
Calculate the product of two vectors of floats and store the result in a vector of floats...
#define VALIDATE_INDEX(idx, limit)
vorbis_residue * residues
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
void(* vorbis_inverse_coupling)(float *mag, float *ang, intptr_t blocksize)
static int get_bits_count(const GetBitContext *s)
bitstream reader API header.
#define CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
int16_t subclass_books[16][8]
void(* vector_fmul_window)(float *dst, const float *src0, const float *src1, const float *win, int len)
Overlap/add with window function.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
static int create_map(vorbis_context *vc, unsigned floor_number)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
av_cold void ff_vorbisdsp_init(VorbisDSPContext *dsp)
static int vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec)
void av_log(void *avcl, int level, const char *fmt,...)
const char * name
Name of the codec implementation.
AVCodec ff_vorbis_decoder
uint64_t channel_layout
Audio channel layout.
union vorbis_floor_u vorbis_floor_data
#define init_vlc(vlc, nb_bits, nb_codes, bits, bits_wrap, bits_size, codes, codes_wrap, codes_size, flags)
static int vorbis_parse_id_hdr(vorbis_context *vc)
#define GET_VALIDATED_INDEX(idx, bits, limit)
union vorbis_floor::vorbis_floor_u data
static void vorbis_free(vorbis_context *vc)
int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, unsigned num)
struct vorbis_floor0_s vorbis_floor0
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
if(ac->has_optimized_func)
uint8_t submap_residue[16]
static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
Libavcodec external API header.
AVSampleFormat
Audio Sample Formats.
static int vorbis_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
int sample_rate
samples per second
main external API structure.
static void close(AVCodecParserContext *s)
const uint64_t ff_vorbis_channel_layouts[9]
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
static unsigned int get_bits1(GetBitContext *s)
vorbis_mapping * mappings
static void skip_bits1(GetBitContext *s)
static void skip_bits(GetBitContext *s, int n)
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
static int vorbis_parse_setup_hdr(vorbis_context *vc)
int avpriv_split_xiph_headers(uint8_t *extradata, int extradata_size, int first_header_size, uint8_t *header_start[3], int header_len[3])
Split a single extradata buffer into the three headers that most Xiph codecs use. ...
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
void(* imdct_half)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
const float *const ff_vorbis_vwin[8]
vorbis_floor1_entry * list
uint8_t class_dimensions[16]
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
av_cold void avpriv_float_dsp_init(AVFloatDSPContext *fdsp, int bit_exact)
Initialize a float DSP context.
static float vorbisfloat2float(unsigned val)
static av_cold int vorbis_decode_init(AVCodecContext *avctx)
uint8_t class_masterbook[16]
common internal api header.
struct vorbis_floor::vorbis_floor_u::vorbis_floor1_s t1
uint8_t partition_class[32]
static av_cold void flush(AVCodecContext *avctx)
Flush (reset) the frame ID after seeking.
static int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr, unsigned ch, uint8_t *do_not_decode, float *vec, unsigned vlen, unsigned ch_left)
static av_always_inline int setup_classifs(vorbis_context *vc, vorbis_residue *vr, uint8_t *do_not_decode, unsigned ch_used, int partition_count)
static av_cold int init(AVCodecParserContext *s)
vorbis_floor_decode_func decode
static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
FmtConvertContext fmt_conv
av_cold void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx)
int channels
number of audio channels
VLC_TYPE(* table)[2]
code, bits
void ff_vorbis_floor1_render_list(vorbis_floor1_entry *list, int values, uint16_t *y_list, int *flag, int multiplier, float *out, int samples)
struct vorbis_floor::vorbis_floor_u::vorbis_floor0_s t0
const uint8_t ff_vorbis_channel_layout_offsets[8][8]
uint8_t ** extended_data
pointers to the data planes/channels.
static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
This structure stores compressed data.
static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
void ff_free_vlc(VLC *vlc)
static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
int nb_samples
number of audio samples (per channel) described by this frame
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
int ff_vorbis_ready_floor1_list(AVCodecContext *avctx, vorbis_floor1_entry *list, int values)