diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/vorbis_enc.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/vorbis_enc.c | 1087 |
1 files changed, 0 insertions, 1087 deletions
diff --git a/contrib/ffmpeg/libavcodec/vorbis_enc.c b/contrib/ffmpeg/libavcodec/vorbis_enc.c deleted file mode 100644 index 3789ef7a2..000000000 --- a/contrib/ffmpeg/libavcodec/vorbis_enc.c +++ /dev/null @@ -1,1087 +0,0 @@ -/* - * copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org> - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file vorbis_enc.c - * Native Vorbis encoder. - * @author Oded Shimon <ods15@ods15.dyndns.org> - */ - -#include <float.h> -#include "avcodec.h" -#include "dsputil.h" -#include "vorbis.h" -#include "vorbis_enc_data.h" - -#undef NDEBUG -#include <assert.h> - -typedef struct { - int nentries; - uint8_t * lens; - uint32_t * codewords; - int ndimentions; - float min; - float delta; - int seq_p; - int lookup; - int * quantlist; - float * dimentions; - float * pow2; -} codebook_t; - -typedef struct { - int dim; - int subclass; - int masterbook; - int * books; -} floor_class_t; - -typedef struct { - int partitions; - int * partition_to_class; - int nclasses; - floor_class_t * classes; - int multiplier; - int rangebits; - int values; - floor1_entry_t * list; -} floor_t; - -typedef struct { - int type; - int begin; - int end; - int partition_size; - int classifications; - int classbook; - int8_t (*books)[8]; - float (*maxes)[2]; -} residue_t; - -typedef struct { - int submaps; - int * mux; - int * floor; - int * residue; - int coupling_steps; - int * magnitude; - int * angle; -} mapping_t; - -typedef struct { - int blockflag; - int mapping; -} vorbis_mode_t; - -typedef struct { - int channels; - int sample_rate; - int log2_blocksize[2]; - MDCTContext mdct[2]; - const float * win[2]; - int have_saved; - float * saved; - float * samples; - float * floor; // also used for tmp values for mdct - float * coeffs; // also used for residue after floor - float quality; - - int ncodebooks; - codebook_t * codebooks; - - int nfloors; - floor_t * floors; - - int nresidues; - residue_t * residues; - - int nmappings; - mapping_t * mappings; - - int nmodes; - vorbis_mode_t * modes; -} venc_context_t; - -typedef struct { - int total; - int total_pos; - int pos; - uint8_t * buf_ptr; -} PutBitContext; - -static inline void init_put_bits(PutBitContext * pb, uint8_t * buf, int buffer_len) { - pb->total = buffer_len * 8; - pb->total_pos = 0; - pb->pos = 0; - pb->buf_ptr = buf; -} - -static void put_bits(PutBitContext * pb, int bits, uint64_t val) { - if ((pb->total_pos += bits) >= pb->total) return; - if (!bits) return; - if (pb->pos) { - if (pb->pos > bits) { - *pb->buf_ptr |= val << (8 - pb->pos); - pb->pos -= bits; - bits = 0; - } else { - *pb->buf_ptr++ |= (val << (8 - pb->pos)) & 0xFF; - val >>= pb->pos; - bits -= pb->pos; - pb->pos = 0; - } - } - for (; bits >= 8; bits -= 8) { - *pb->buf_ptr++ = val & 0xFF; - val >>= 8; - } - if (bits) { - *pb->buf_ptr = val; - pb->pos = 8 - bits; - } -} - -static inline void flush_put_bits(PutBitContext * pb) { -} - -static inline int put_bits_count(PutBitContext * pb) { - return pb->total_pos; -} - -static inline void put_codeword(PutBitContext * pb, codebook_t * cb, int entry) { - assert(entry >= 0); - assert(entry < cb->nentries); - assert(cb->lens[entry]); - put_bits(pb, cb->lens[entry], cb->codewords[entry]); -} - -static int cb_lookup_vals(int lookup, int dimentions, int entries) { - if (lookup == 1) return ff_vorbis_nth_root(entries, dimentions); - else if (lookup == 2) return dimentions * entries; - return 0; -} - -static void ready_codebook(codebook_t * cb) { - int i; - - ff_vorbis_len2vlc(cb->lens, cb->codewords, cb->nentries); - - if (!cb->lookup) - cb->pow2 = cb->dimentions = NULL; - else { - int vals = cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries); - cb->dimentions = av_malloc(sizeof(float) * cb->nentries * cb->ndimentions); - cb->pow2 = av_mallocz(sizeof(float) * cb->nentries); - for (i = 0; i < cb->nentries; i++) { - float last = 0; - int j; - int div = 1; - for (j = 0; j < cb->ndimentions; j++) { - int off; - if (cb->lookup == 1) - off = (i / div) % vals; // lookup type 1 - else - off = i * cb->ndimentions + j; // lookup type 2 - - cb->dimentions[i * cb->ndimentions + j] = last + cb->min + cb->quantlist[off] * cb->delta; - if (cb->seq_p) - last = cb->dimentions[i * cb->ndimentions + j]; - cb->pow2[i] += cb->dimentions[i * cb->ndimentions + j]*cb->dimentions[i * cb->ndimentions + j]; - div *= vals; - } - cb->pow2[i] /= 2.; - } - } -} - -static void ready_residue(residue_t * rc, venc_context_t * venc) { - int i; - assert(rc->type == 2); - rc->maxes = av_mallocz(sizeof(float[2]) * rc->classifications); - for (i = 0; i < rc->classifications; i++) { - int j; - codebook_t * cb; - for (j = 0; j < 8; j++) - if (rc->books[i][j] != -1) break; - if (j == 8) continue; // zero - cb = &venc->codebooks[rc->books[i][j]]; - assert(cb->ndimentions >= 2); - assert(cb->lookup); - - for (j = 0; j < cb->nentries; j++) { - float a; - if (!cb->lens[j]) continue; - a = fabs(cb->dimentions[j * cb->ndimentions]); - if (a > rc->maxes[i][0]) - rc->maxes[i][0] = a; - a = fabs(cb->dimentions[j * cb->ndimentions + 1]); - if (a > rc->maxes[i][1]) - rc->maxes[i][1] = a; - } - } - // small bias - for (i = 0; i < rc->classifications; i++) { - rc->maxes[i][0] += 0.8; - rc->maxes[i][1] += 0.8; - } -} - -static void create_vorbis_context(venc_context_t * venc, AVCodecContext * avccontext) { - floor_t * fc; - residue_t * rc; - mapping_t * mc; - int i, book; - - venc->channels = avccontext->channels; - venc->sample_rate = avccontext->sample_rate; - venc->log2_blocksize[0] = venc->log2_blocksize[1] = 11; - - venc->ncodebooks = sizeof(cvectors)/sizeof(cvectors[0]); - venc->codebooks = av_malloc(sizeof(codebook_t) * venc->ncodebooks); - - // codebook 0..14 - floor1 book, values 0..255 - // codebook 15 residue masterbook - // codebook 16..29 residue - for (book = 0; book < venc->ncodebooks; book++) { - codebook_t * cb = &venc->codebooks[book]; - int vals; - cb->ndimentions = cvectors[book].dim; - cb->nentries = cvectors[book].real_len; - cb->min = cvectors[book].min; - cb->delta = cvectors[book].delta; - cb->lookup = cvectors[book].lookup; - cb->seq_p = 0; - - cb->lens = av_malloc(sizeof(uint8_t) * cb->nentries); - cb->codewords = av_malloc(sizeof(uint32_t) * cb->nentries); - memcpy(cb->lens, cvectors[book].clens, cvectors[book].len); - memset(cb->lens + cvectors[book].len, 0, cb->nentries - cvectors[book].len); - - if (cb->lookup) { - vals = cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries); - cb->quantlist = av_malloc(sizeof(int) * vals); - for (i = 0; i < vals; i++) - cb->quantlist[i] = cvectors[book].quant[i]; - } else { - cb->quantlist = NULL; - } - ready_codebook(cb); - } - - venc->nfloors = 1; - venc->floors = av_malloc(sizeof(floor_t) * venc->nfloors); - - // just 1 floor - fc = &venc->floors[0]; - fc->partitions = 8; - fc->partition_to_class = av_malloc(sizeof(int) * fc->partitions); - fc->nclasses = 0; - for (i = 0; i < fc->partitions; i++) { - static const int a[] = {0,1,2,2,3,3,4,4}; - fc->partition_to_class[i] = a[i]; - fc->nclasses = FFMAX(fc->nclasses, fc->partition_to_class[i]); - } - fc->nclasses++; - fc->classes = av_malloc(sizeof(floor_class_t) * fc->nclasses); - for (i = 0; i < fc->nclasses; i++) { - floor_class_t * c = &fc->classes[i]; - int j, books; - c->dim = floor_classes[i].dim; - c->subclass = floor_classes[i].subclass; - c->masterbook = floor_classes[i].masterbook; - books = (1 << c->subclass); - c->books = av_malloc(sizeof(int) * books); - for (j = 0; j < books; j++) - c->books[j] = floor_classes[i].nbooks[j]; - } - fc->multiplier = 2; - fc->rangebits = venc->log2_blocksize[0] - 1; - - fc->values = 2; - for (i = 0; i < fc->partitions; i++) - fc->values += fc->classes[fc->partition_to_class[i]].dim; - - fc->list = av_malloc(sizeof(floor1_entry_t) * fc->values); - fc->list[0].x = 0; - fc->list[1].x = 1 << fc->rangebits; - for (i = 2; i < fc->values; i++) { - static const int a[] = { - 93, 23,372, 6, 46,186,750, 14, 33, 65, - 130,260,556, 3, 10, 18, 28, 39, 55, 79, - 111,158,220,312,464,650,850 - }; - fc->list[i].x = a[i - 2]; - } - ff_vorbis_ready_floor1_list(fc->list, fc->values); - - venc->nresidues = 1; - venc->residues = av_malloc(sizeof(residue_t) * venc->nresidues); - - // single residue - rc = &venc->residues[0]; - rc->type = 2; - rc->begin = 0; - rc->end = 1600; - rc->partition_size = 32; - rc->classifications = 10; - rc->classbook = 15; - rc->books = av_malloc(sizeof(*rc->books) * rc->classifications); - { - static const int8_t a[10][8] = { - { -1, -1, -1, -1, -1, -1, -1, -1, }, - { -1, -1, 16, -1, -1, -1, -1, -1, }, - { -1, -1, 17, -1, -1, -1, -1, -1, }, - { -1, -1, 18, -1, -1, -1, -1, -1, }, - { -1, -1, 19, -1, -1, -1, -1, -1, }, - { -1, -1, 20, -1, -1, -1, -1, -1, }, - { -1, -1, 21, -1, -1, -1, -1, -1, }, - { 22, 23, -1, -1, -1, -1, -1, -1, }, - { 24, 25, -1, -1, -1, -1, -1, -1, }, - { 26, 27, 28, -1, -1, -1, -1, -1, }, - }; - memcpy(rc->books, a, sizeof a); - } - ready_residue(rc, venc); - - venc->nmappings = 1; - venc->mappings = av_malloc(sizeof(mapping_t) * venc->nmappings); - - // single mapping - mc = &venc->mappings[0]; - mc->submaps = 1; - mc->mux = av_malloc(sizeof(int) * venc->channels); - for (i = 0; i < venc->channels; i++) - mc->mux[i] = 0; - mc->floor = av_malloc(sizeof(int) * mc->submaps); - mc->residue = av_malloc(sizeof(int) * mc->submaps); - for (i = 0; i < mc->submaps; i++) { - mc->floor[i] = 0; - mc->residue[i] = 0; - } - mc->coupling_steps = venc->channels == 2 ? 1 : 0; - mc->magnitude = av_malloc(sizeof(int) * mc->coupling_steps); - mc->angle = av_malloc(sizeof(int) * mc->coupling_steps); - if (mc->coupling_steps) { - mc->magnitude[0] = 0; - mc->angle[0] = 1; - } - - venc->nmodes = 1; - venc->modes = av_malloc(sizeof(vorbis_mode_t) * venc->nmodes); - - // single mode - venc->modes[0].blockflag = 0; - venc->modes[0].mapping = 0; - - venc->have_saved = 0; - venc->saved = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1]) / 2); - venc->samples = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1])); - venc->floor = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1]) / 2); - venc->coeffs = av_malloc(sizeof(float) * venc->channels * (1 << venc->log2_blocksize[1]) / 2); - - venc->win[0] = ff_vorbis_vwin[venc->log2_blocksize[0] - 6]; - venc->win[1] = ff_vorbis_vwin[venc->log2_blocksize[1] - 6]; - - ff_mdct_init(&venc->mdct[0], venc->log2_blocksize[0], 0); - ff_mdct_init(&venc->mdct[1], venc->log2_blocksize[1], 0); -} - -static void put_float(PutBitContext * pb, float f) { - int exp, mant; - uint32_t res = 0; - mant = (int)ldexp(frexp(f, &exp), 20); - exp += 788 - 20; - if (mant < 0) { res |= (1 << 31); mant = -mant; } - res |= mant | (exp << 21); - put_bits(pb, 32, res); -} - -static void put_codebook_header(PutBitContext * pb, codebook_t * cb) { - int i; - int ordered = 0; - - put_bits(pb, 24, 0x564342); //magic - put_bits(pb, 16, cb->ndimentions); - put_bits(pb, 24, cb->nentries); - - for (i = 1; i < cb->nentries; i++) - if (cb->lens[i] < cb->lens[i-1]) break; - if (i == cb->nentries) - ordered = 1; - - put_bits(pb, 1, ordered); - if (ordered) { - int len = cb->lens[0]; - put_bits(pb, 5, len - 1); - i = 0; - while (i < cb->nentries) { - int j; - for (j = 0; j+i < cb->nentries; j++) - if (cb->lens[j+i] != len) break; - put_bits(pb, ilog(cb->nentries - i), j); - i += j; - len++; - } - } else { - int sparse = 0; - for (i = 0; i < cb->nentries; i++) - if (!cb->lens[i]) break; - if (i != cb->nentries) - sparse = 1; - put_bits(pb, 1, sparse); - - for (i = 0; i < cb->nentries; i++) { - if (sparse) put_bits(pb, 1, !!cb->lens[i]); - if (cb->lens[i]) put_bits(pb, 5, cb->lens[i] - 1); - } - } - - put_bits(pb, 4, cb->lookup); - if (cb->lookup) { - int tmp = cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries); - int bits = ilog(cb->quantlist[0]); - - for (i = 1; i < tmp; i++) - bits = FFMAX(bits, ilog(cb->quantlist[i])); - - put_float(pb, cb->min); - put_float(pb, cb->delta); - - put_bits(pb, 4, bits - 1); - put_bits(pb, 1, cb->seq_p); - - for (i = 0; i < tmp; i++) - put_bits(pb, bits, cb->quantlist[i]); - } -} - -static void put_floor_header(PutBitContext * pb, floor_t * fc) { - int i; - - put_bits(pb, 16, 1); // type, only floor1 is supported - - put_bits(pb, 5, fc->partitions); - - for (i = 0; i < fc->partitions; i++) - put_bits(pb, 4, fc->partition_to_class[i]); - - for (i = 0; i < fc->nclasses; i++) { - int j, books; - - put_bits(pb, 3, fc->classes[i].dim - 1); - put_bits(pb, 2, fc->classes[i].subclass); - - if (fc->classes[i].subclass) - put_bits(pb, 8, fc->classes[i].masterbook); - - books = (1 << fc->classes[i].subclass); - - for (j = 0; j < books; j++) - put_bits(pb, 8, fc->classes[i].books[j] + 1); - } - - put_bits(pb, 2, fc->multiplier - 1); - put_bits(pb, 4, fc->rangebits); - - for (i = 2; i < fc->values; i++) - put_bits(pb, fc->rangebits, fc->list[i].x); -} - -static void put_residue_header(PutBitContext * pb, residue_t * rc) { - int i; - - put_bits(pb, 16, rc->type); - - put_bits(pb, 24, rc->begin); - put_bits(pb, 24, rc->end); - put_bits(pb, 24, rc->partition_size - 1); - put_bits(pb, 6, rc->classifications - 1); - put_bits(pb, 8, rc->classbook); - - for (i = 0; i < rc->classifications; i++) { - int j, tmp = 0; - for (j = 0; j < 8; j++) - tmp |= (rc->books[i][j] != -1) << j; - - put_bits(pb, 3, tmp & 7); - put_bits(pb, 1, tmp > 7); - - if (tmp > 7) - put_bits(pb, 5, tmp >> 3); - } - - for (i = 0; i < rc->classifications; i++) { - int j; - for (j = 0; j < 8; j++) - if (rc->books[i][j] != -1) - put_bits(pb, 8, rc->books[i][j]); - } -} - -static int put_main_header(venc_context_t * venc, uint8_t ** out) { - int i; - PutBitContext pb; - uint8_t buffer[50000] = {0}, * p = buffer; - int buffer_len = sizeof buffer; - int len, hlens[3]; - - // identification header - init_put_bits(&pb, p, buffer_len); - put_bits(&pb, 8, 1); //magic - for (i = 0; "vorbis"[i]; i++) - put_bits(&pb, 8, "vorbis"[i]); - put_bits(&pb, 32, 0); // version - put_bits(&pb, 8, venc->channels); - put_bits(&pb, 32, venc->sample_rate); - put_bits(&pb, 32, 0); // bitrate - put_bits(&pb, 32, 0); // bitrate - put_bits(&pb, 32, 0); // bitrate - put_bits(&pb, 4, venc->log2_blocksize[0]); - put_bits(&pb, 4, venc->log2_blocksize[1]); - put_bits(&pb, 1, 1); // framing - - flush_put_bits(&pb); - hlens[0] = (put_bits_count(&pb) + 7) / 8; - buffer_len -= hlens[0]; - p += hlens[0]; - - // comment header - init_put_bits(&pb, p, buffer_len); - put_bits(&pb, 8, 3); //magic - for (i = 0; "vorbis"[i]; i++) - put_bits(&pb, 8, "vorbis"[i]); - put_bits(&pb, 32, 0); // vendor length TODO - put_bits(&pb, 32, 0); // amount of comments - put_bits(&pb, 1, 1); // framing - - flush_put_bits(&pb); - hlens[1] = (put_bits_count(&pb) + 7) / 8; - buffer_len -= hlens[1]; - p += hlens[1]; - - // setup header - init_put_bits(&pb, p, buffer_len); - put_bits(&pb, 8, 5); //magic - for (i = 0; "vorbis"[i]; i++) - put_bits(&pb, 8, "vorbis"[i]); - - // codebooks - put_bits(&pb, 8, venc->ncodebooks - 1); - for (i = 0; i < venc->ncodebooks; i++) - put_codebook_header(&pb, &venc->codebooks[i]); - - // time domain, reserved, zero - put_bits(&pb, 6, 0); - put_bits(&pb, 16, 0); - - // floors - put_bits(&pb, 6, venc->nfloors - 1); - for (i = 0; i < venc->nfloors; i++) - put_floor_header(&pb, &venc->floors[i]); - - // residues - put_bits(&pb, 6, venc->nresidues - 1); - for (i = 0; i < venc->nresidues; i++) - put_residue_header(&pb, &venc->residues[i]); - - // mappings - put_bits(&pb, 6, venc->nmappings - 1); - for (i = 0; i < venc->nmappings; i++) { - mapping_t * mc = &venc->mappings[i]; - int j; - put_bits(&pb, 16, 0); // mapping type - - put_bits(&pb, 1, mc->submaps > 1); - if (mc->submaps > 1) - put_bits(&pb, 4, mc->submaps - 1); - - put_bits(&pb, 1, !!mc->coupling_steps); - if (mc->coupling_steps) { - put_bits(&pb, 8, mc->coupling_steps - 1); - for (j = 0; j < mc->coupling_steps; j++) { - put_bits(&pb, ilog(venc->channels - 1), mc->magnitude[j]); - put_bits(&pb, ilog(venc->channels - 1), mc->angle[j]); - } - } - - put_bits(&pb, 2, 0); // reserved - - if (mc->submaps > 1) - for (j = 0; j < venc->channels; j++) - put_bits(&pb, 4, mc->mux[j]); - - for (j = 0; j < mc->submaps; j++) { - put_bits(&pb, 8, 0); // reserved time configuration - put_bits(&pb, 8, mc->floor[j]); - put_bits(&pb, 8, mc->residue[j]); - } - } - - // modes - put_bits(&pb, 6, venc->nmodes - 1); - for (i = 0; i < venc->nmodes; i++) { - put_bits(&pb, 1, venc->modes[i].blockflag); - put_bits(&pb, 16, 0); // reserved window type - put_bits(&pb, 16, 0); // reserved transform type - put_bits(&pb, 8, venc->modes[i].mapping); - } - - put_bits(&pb, 1, 1); // framing - - flush_put_bits(&pb); - hlens[2] = (put_bits_count(&pb) + 7) / 8; - - len = hlens[0] + hlens[1] + hlens[2]; - p = *out = av_mallocz(64 + len + len/255); - - *p++ = 2; - p += av_xiphlacing(p, hlens[0]); - p += av_xiphlacing(p, hlens[1]); - buffer_len = 0; - for (i = 0; i < 3; i++) { - memcpy(p, buffer + buffer_len, hlens[i]); - p += hlens[i]; - buffer_len += hlens[i]; - } - - return p - *out; -} - -static float get_floor_average(floor_t * fc, float * coeffs, int i) { - int begin = fc->list[fc->list[FFMAX(i-1, 0)].sort].x; - int end = fc->list[fc->list[FFMIN(i+1, fc->values - 1)].sort].x; - int j; - float average = 0; - - for (j = begin; j < end; j++) - average += fabs(coeffs[j]); - return average / (end - begin); -} - -static void floor_fit(venc_context_t * venc, floor_t * fc, float * coeffs, uint_fast16_t * posts, int samples) { - int range = 255 / fc->multiplier + 1; - int i; - float tot_average = 0.; - float averages[fc->values]; - for (i = 0; i < fc->values; i++){ - averages[i] = get_floor_average(fc, coeffs, i); - tot_average += averages[i]; - } - tot_average /= fc->values; - tot_average /= venc->quality; - - for (i = 0; i < fc->values; i++) { - int position = fc->list[fc->list[i].sort].x; - float average = averages[i]; - int j; - - average *= pow(tot_average / average, 0.5) * pow(1.25, position/200.); // MAGIC! - for (j = 0; j < range - 1; j++) - if (ff_vorbis_floor1_inverse_db_table[j * fc->multiplier] > average) break; - posts[fc->list[i].sort] = j; - } -} - -static int render_point(int x0, int y0, int x1, int y1, int x) { - return y0 + (x - x0) * (y1 - y0) / (x1 - x0); -} - -static void floor_encode(venc_context_t * venc, floor_t * fc, PutBitContext * pb, uint_fast16_t * posts, float * floor, int samples) { - int range = 255 / fc->multiplier + 1; - int coded[fc->values]; // first 2 values are unused - int i, counter; - - put_bits(pb, 1, 1); // non zero - put_bits(pb, ilog(range - 1), posts[0]); - put_bits(pb, ilog(range - 1), posts[1]); - coded[0] = coded[1] = 1; - - for (i = 2; i < fc->values; i++) { - int predicted = render_point(fc->list[fc->list[i].low].x, - posts[fc->list[i].low], - fc->list[fc->list[i].high].x, - posts[fc->list[i].high], - fc->list[i].x); - int highroom = range - predicted; - int lowroom = predicted; - int room = FFMIN(highroom, lowroom); - if (predicted == posts[i]) { - coded[i] = 0; // must be used later as flag! - continue; - } else { - if (!coded[fc->list[i].low ]) coded[fc->list[i].low ] = -1; - if (!coded[fc->list[i].high]) coded[fc->list[i].high] = -1; - } - if (posts[i] > predicted) { - if (posts[i] - predicted > room) - coded[i] = posts[i] - predicted + lowroom; - else - coded[i] = (posts[i] - predicted) << 1; - } else { - if (predicted - posts[i] > room) - coded[i] = predicted - posts[i] + highroom - 1; - else - coded[i] = ((predicted - posts[i]) << 1) - 1; - } - } - - counter = 2; - for (i = 0; i < fc->partitions; i++) { - floor_class_t * c = &fc->classes[fc->partition_to_class[i]]; - int k, cval = 0, csub = 1<<c->subclass; - if (c->subclass) { - codebook_t * book = &venc->codebooks[c->masterbook]; - int cshift = 0; - for (k = 0; k < c->dim; k++) { - int l; - for (l = 0; l < csub; l++) { - int maxval = 1; - if (c->books[l] != -1) - maxval = venc->codebooks[c->books[l]].nentries; - // coded could be -1, but this still works, cause thats 0 - if (coded[counter + k] < maxval) break; - } - assert(l != csub); - cval |= l << cshift; - cshift += c->subclass; - } - put_codeword(pb, book, cval); - } - for (k = 0; k < c->dim; k++) { - int book = c->books[cval & (csub-1)]; - int entry = coded[counter++]; - cval >>= c->subclass; - if (book == -1) continue; - if (entry == -1) entry = 0; - put_codeword(pb, &venc->codebooks[book], entry); - } - } - - ff_vorbis_floor1_render_list(fc->list, fc->values, posts, coded, fc->multiplier, floor, samples); -} - -static float * put_vector(codebook_t * book, PutBitContext * pb, float * num) { - int i, entry = -1; - float distance = FLT_MAX; - assert(book->dimentions); - for (i = 0; i < book->nentries; i++) { - float * vec = book->dimentions + i * book->ndimentions, d = book->pow2[i]; - int j; - if (!book->lens[i]) continue; - for (j = 0; j < book->ndimentions; j++) - d -= vec[j] * num[j]; - if (distance > d) { - entry = i; - distance = d; - } - } - put_codeword(pb, book, entry); - return &book->dimentions[entry * book->ndimentions]; -} - -static void residue_encode(venc_context_t * venc, residue_t * rc, PutBitContext * pb, float * coeffs, int samples, int real_ch) { - int pass, i, j, p, k; - int psize = rc->partition_size; - int partitions = (rc->end - rc->begin) / psize; - int channels = (rc->type == 2) ? 1 : real_ch; - int classes[channels][partitions]; - int classwords = venc->codebooks[rc->classbook].ndimentions; - - assert(rc->type == 2); - assert(real_ch == 2); - for (p = 0; p < partitions; p++) { - float max1 = 0., max2 = 0.; - int s = rc->begin + p * psize; - for (k = s; k < s + psize; k += 2) { - max1 = FFMAX(max1, fabs(coeffs[ k / real_ch])); - max2 = FFMAX(max2, fabs(coeffs[samples + k / real_ch])); - } - - for (i = 0; i < rc->classifications - 1; i++) { - if (max1 < rc->maxes[i][0] && max2 < rc->maxes[i][1]) break; - } - classes[0][p] = i; - } - - for (pass = 0; pass < 8; pass++) { - p = 0; - while (p < partitions) { - if (pass == 0) - for (j = 0; j < channels; j++) { - codebook_t * book = &venc->codebooks[rc->classbook]; - int entry = 0; - for (i = 0; i < classwords; i++) { - entry *= rc->classifications; - entry += classes[j][p + i]; - } - put_codeword(pb, book, entry); - } - for (i = 0; i < classwords && p < partitions; i++, p++) { - for (j = 0; j < channels; j++) { - int nbook = rc->books[classes[j][p]][pass]; - codebook_t * book = &venc->codebooks[nbook]; - float * buf = coeffs + samples*j + rc->begin + p*psize; - if (nbook == -1) continue; - - assert(rc->type == 0 || rc->type == 2); - assert(!(psize % book->ndimentions)); - - if (rc->type == 0) { - for (k = 0; k < psize; k += book->ndimentions) { - float * a = put_vector(book, pb, &buf[k]); - int l; - for (l = 0; l < book->ndimentions; l++) - buf[k + l] -= a[l]; - } - } else { - int s = rc->begin + p * psize, a1, b1; - a1 = (s % real_ch) * samples; - b1 = s / real_ch; - s = real_ch * samples; - for (k = 0; k < psize; k += book->ndimentions) { - int dim, a2 = a1, b2 = b1; - float vec[book->ndimentions], * pv = vec; - for (dim = book->ndimentions; dim--; ) { - *pv++ = coeffs[a2 + b2]; - if ((a2 += samples) == s) { - a2=0; - b2++; - } - } - pv = put_vector(book, pb, vec); - for (dim = book->ndimentions; dim--; ) { - coeffs[a1 + b1] -= *pv++; - if ((a1 += samples) == s) { - a1=0; - b1++; - } - } - } - } - } - } - } - } -} - -static int apply_window_and_mdct(venc_context_t * venc, signed short * audio, int samples) { - int i, j, channel; - const float * win = venc->win[0]; - int window_len = 1 << (venc->log2_blocksize[0] - 1); - float n = (float)(1 << venc->log2_blocksize[0]) / 4.; - // FIXME use dsp - - if (!venc->have_saved && !samples) return 0; - - if (venc->have_saved) { - for (channel = 0; channel < venc->channels; channel++) { - memcpy(venc->samples + channel*window_len*2, venc->saved + channel*window_len, sizeof(float)*window_len); - } - } else { - for (channel = 0; channel < venc->channels; channel++) { - memset(venc->samples + channel*window_len*2, 0, sizeof(float)*window_len); - } - } - - if (samples) { - for (channel = 0; channel < venc->channels; channel++) { - float * offset = venc->samples + channel*window_len*2 + window_len; - j = channel; - for (i = 0; i < samples; i++, j += venc->channels) - offset[i] = -audio[j] / 32768. / n * win[window_len - i - 1]; //FIXME find out why the sign has to be fliped - } - } else { - for (channel = 0; channel < venc->channels; channel++) { - memset(venc->samples + channel*window_len*2 + window_len, 0, sizeof(float)*window_len); - } - } - - for (channel = 0; channel < venc->channels; channel++) { - ff_mdct_calc(&venc->mdct[0], venc->coeffs + channel*window_len, venc->samples + channel*window_len*2, venc->floor/*tmp*/); - } - - if (samples) { - for (channel = 0; channel < venc->channels; channel++) { - float * offset = venc->saved + channel*window_len; - j = channel; - for (i = 0; i < samples; i++, j += venc->channels) - offset[i] = -audio[j] / 32768. / n * win[i]; //FIXME find out why the sign has to be fliped - } - venc->have_saved = 1; - } else { - venc->have_saved = 0; - } - return 1; -} - -static int vorbis_encode_init(AVCodecContext * avccontext) -{ - venc_context_t * venc = avccontext->priv_data; - - if (avccontext->channels != 2) { - av_log(avccontext, AV_LOG_ERROR, "Current FFmpeg Vorbis encoder only supports 2 channels.\n"); - return -1; - } - - create_vorbis_context(venc, avccontext); - - if (avccontext->flags & CODEC_FLAG_QSCALE) - venc->quality = avccontext->global_quality / (float)FF_QP2LAMBDA / 10.; - else - venc->quality = 1.; - venc->quality *= venc->quality; - - avccontext->extradata_size = put_main_header(venc, (uint8_t**)&avccontext->extradata); - - avccontext->frame_size = 1 << (venc->log2_blocksize[0] - 1); - - avccontext->coded_frame = avcodec_alloc_frame(); - avccontext->coded_frame->key_frame = 1; - - return 0; -} - -static int vorbis_encode_frame(AVCodecContext * avccontext, unsigned char * packets, int buf_size, void *data) -{ - venc_context_t * venc = avccontext->priv_data; - signed short * audio = data; - int samples = data ? avccontext->frame_size : 0; - vorbis_mode_t * mode; - mapping_t * mapping; - PutBitContext pb; - int i; - - if (!apply_window_and_mdct(venc, audio, samples)) return 0; - samples = 1 << (venc->log2_blocksize[0] - 1); - - init_put_bits(&pb, packets, buf_size); - - put_bits(&pb, 1, 0); // magic bit - - put_bits(&pb, ilog(venc->nmodes - 1), 0); // 0 bits, the mode - - mode = &venc->modes[0]; - mapping = &venc->mappings[mode->mapping]; - if (mode->blockflag) { - put_bits(&pb, 1, 0); - put_bits(&pb, 1, 0); - } - - for (i = 0; i < venc->channels; i++) { - floor_t * fc = &venc->floors[mapping->floor[mapping->mux[i]]]; - uint_fast16_t posts[fc->values]; - floor_fit(venc, fc, &venc->coeffs[i * samples], posts, samples); - floor_encode(venc, fc, &pb, posts, &venc->floor[i * samples], samples); - } - - for (i = 0; i < venc->channels * samples; i++) { - venc->coeffs[i] /= venc->floor[i]; - } - - for (i = 0; i < mapping->coupling_steps; i++) { - float * mag = venc->coeffs + mapping->magnitude[i] * samples; - float * ang = venc->coeffs + mapping->angle[i] * samples; - int j; - for (j = 0; j < samples; j++) { - float a = ang[j]; - ang[j] -= mag[j]; - if (mag[j] > 0) ang[j] = -ang[j]; - if (ang[j] < 0) mag[j] = a; - } - } - - residue_encode(venc, &venc->residues[mapping->residue[mapping->mux[0]]], &pb, venc->coeffs, samples, venc->channels); - - flush_put_bits(&pb); - return (put_bits_count(&pb) + 7) / 8; -} - - -static int vorbis_encode_close(AVCodecContext * avccontext) -{ - venc_context_t * venc = avccontext->priv_data; - int i; - - if (venc->codebooks) - for (i = 0; i < venc->ncodebooks; i++) { - av_freep(&venc->codebooks[i].lens); - av_freep(&venc->codebooks[i].codewords); - av_freep(&venc->codebooks[i].quantlist); - av_freep(&venc->codebooks[i].dimentions); - av_freep(&venc->codebooks[i].pow2); - } - av_freep(&venc->codebooks); - - if (venc->floors) - for (i = 0; i < venc->nfloors; i++) { - int j; - if (venc->floors[i].classes) - for (j = 0; j < venc->floors[i].nclasses; j++) - av_freep(&venc->floors[i].classes[j].books); - av_freep(&venc->floors[i].classes); - av_freep(&venc->floors[i].partition_to_class); - av_freep(&venc->floors[i].list); - } - av_freep(&venc->floors); - - if (venc->residues) - for (i = 0; i < venc->nresidues; i++) { - av_freep(&venc->residues[i].books); - av_freep(&venc->residues[i].maxes); - } - av_freep(&venc->residues); - - if (venc->mappings) - for (i = 0; i < venc->nmappings; i++) { - av_freep(&venc->mappings[i].mux); - av_freep(&venc->mappings[i].floor); - av_freep(&venc->mappings[i].residue); - av_freep(&venc->mappings[i].magnitude); - av_freep(&venc->mappings[i].angle); - } - av_freep(&venc->mappings); - - av_freep(&venc->modes); - - av_freep(&venc->saved); - av_freep(&venc->samples); - av_freep(&venc->floor); - av_freep(&venc->coeffs); - - ff_mdct_end(&venc->mdct[0]); - ff_mdct_end(&venc->mdct[1]); - - av_freep(&avccontext->coded_frame); - av_freep(&avccontext->extradata); - - return 0 ; -} - -AVCodec vorbis_encoder = { - "vorbis", - CODEC_TYPE_AUDIO, - CODEC_ID_VORBIS, - sizeof(venc_context_t), - vorbis_encode_init, - vorbis_encode_frame, - vorbis_encode_close, - .capabilities= CODEC_CAP_DELAY, -}; |