diff options
Diffstat (limited to 'ffmpeg/libavcodec/vorbisenc.c')
| -rw-r--r-- | ffmpeg/libavcodec/vorbisenc.c | 1205 |
1 files changed, 0 insertions, 1205 deletions
diff --git a/ffmpeg/libavcodec/vorbisenc.c b/ffmpeg/libavcodec/vorbisenc.c deleted file mode 100644 index 9ef6296..0000000 --- a/ffmpeg/libavcodec/vorbisenc.c +++ /dev/null @@ -1,1205 +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 Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * Native Vorbis encoder. - * @author Oded Shimon <ods15@ods15.dyndns.org> - */ - -#include <float.h> -#include "avcodec.h" -#include "internal.h" -#include "fft.h" -#include "vorbis.h" -#include "vorbis_enc_data.h" - -#define BITSTREAM_WRITER_LE -#include "put_bits.h" - -#undef NDEBUG -#include <assert.h> - -typedef struct { - int nentries; - uint8_t *lens; - uint32_t *codewords; - int ndimensions; - float min; - float delta; - int seq_p; - int lookup; - int *quantlist; - float *dimensions; - float *pow2; -} vorbis_enc_codebook; - -typedef struct { - int dim; - int subclass; - int masterbook; - int *books; -} vorbis_enc_floor_class; - -typedef struct { - int partitions; - int *partition_to_class; - int nclasses; - vorbis_enc_floor_class *classes; - int multiplier; - int rangebits; - int values; - vorbis_floor1_entry *list; -} vorbis_enc_floor; - -typedef struct { - int type; - int begin; - int end; - int partition_size; - int classifications; - int classbook; - int8_t (*books)[8]; - float (*maxes)[2]; -} vorbis_enc_residue; - -typedef struct { - int submaps; - int *mux; - int *floor; - int *residue; - int coupling_steps; - int *magnitude; - int *angle; -} vorbis_enc_mapping; - -typedef struct { - int blockflag; - int mapping; -} vorbis_enc_mode; - -typedef struct { - int channels; - int sample_rate; - int log2_blocksize[2]; - FFTContext 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; - vorbis_enc_codebook *codebooks; - - int nfloors; - vorbis_enc_floor *floors; - - int nresidues; - vorbis_enc_residue *residues; - - int nmappings; - vorbis_enc_mapping *mappings; - - int nmodes; - vorbis_enc_mode *modes; - - int64_t next_pts; -} vorbis_enc_context; - -#define MAX_CHANNELS 2 -#define MAX_CODEBOOK_DIM 8 - -#define MAX_FLOOR_CLASS_DIM 4 -#define NUM_FLOOR_PARTITIONS 8 -#define MAX_FLOOR_VALUES (MAX_FLOOR_CLASS_DIM*NUM_FLOOR_PARTITIONS+2) - -#define RESIDUE_SIZE 1600 -#define RESIDUE_PART_SIZE 32 -#define NUM_RESIDUE_PARTITIONS (RESIDUE_SIZE/RESIDUE_PART_SIZE) - -static inline int put_codeword(PutBitContext *pb, vorbis_enc_codebook *cb, - int entry) -{ - av_assert2(entry >= 0); - av_assert2(entry < cb->nentries); - av_assert2(cb->lens[entry]); - if (pb->size_in_bits - put_bits_count(pb) < cb->lens[entry]) - return AVERROR(EINVAL); - put_bits(pb, cb->lens[entry], cb->codewords[entry]); - return 0; -} - -static int cb_lookup_vals(int lookup, int dimensions, int entries) -{ - if (lookup == 1) - return ff_vorbis_nth_root(entries, dimensions); - else if (lookup == 2) - return dimensions *entries; - return 0; -} - -static int ready_codebook(vorbis_enc_codebook *cb) -{ - int i; - - ff_vorbis_len2vlc(cb->lens, cb->codewords, cb->nentries); - - if (!cb->lookup) { - cb->pow2 = cb->dimensions = NULL; - } else { - int vals = cb_lookup_vals(cb->lookup, cb->ndimensions, cb->nentries); - cb->dimensions = av_malloc(sizeof(float) * cb->nentries * cb->ndimensions); - cb->pow2 = av_mallocz(sizeof(float) * cb->nentries); - if (!cb->dimensions || !cb->pow2) - return AVERROR(ENOMEM); - for (i = 0; i < cb->nentries; i++) { - float last = 0; - int j; - int div = 1; - for (j = 0; j < cb->ndimensions; j++) { - int off; - if (cb->lookup == 1) - off = (i / div) % vals; // lookup type 1 - else - off = i * cb->ndimensions + j; // lookup type 2 - - cb->dimensions[i * cb->ndimensions + j] = last + cb->min + cb->quantlist[off] * cb->delta; - if (cb->seq_p) - last = cb->dimensions[i * cb->ndimensions + j]; - cb->pow2[i] += cb->dimensions[i * cb->ndimensions + j] * cb->dimensions[i * cb->ndimensions + j]; - div *= vals; - } - cb->pow2[i] /= 2.0; - } - } - return 0; -} - -static int ready_residue(vorbis_enc_residue *rc, vorbis_enc_context *venc) -{ - int i; - av_assert0(rc->type == 2); - rc->maxes = av_mallocz(sizeof(float[2]) * rc->classifications); - if (!rc->maxes) - return AVERROR(ENOMEM); - for (i = 0; i < rc->classifications; i++) { - int j; - vorbis_enc_codebook * cb; - for (j = 0; j < 8; j++) - if (rc->books[i][j] != -1) - break; - if (j == 8) // zero - continue; - cb = &venc->codebooks[rc->books[i][j]]; - assert(cb->ndimensions >= 2); - assert(cb->lookup); - - for (j = 0; j < cb->nentries; j++) { - float a; - if (!cb->lens[j]) - continue; - a = fabs(cb->dimensions[j * cb->ndimensions]); - if (a > rc->maxes[i][0]) - rc->maxes[i][0] = a; - a = fabs(cb->dimensions[j * cb->ndimensions + 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; - } - return 0; -} - -static int create_vorbis_context(vorbis_enc_context *venc, - AVCodecContext *avctx) -{ - vorbis_enc_floor *fc; - vorbis_enc_residue *rc; - vorbis_enc_mapping *mc; - int i, book, ret; - - venc->channels = avctx->channels; - venc->sample_rate = avctx->sample_rate; - venc->log2_blocksize[0] = venc->log2_blocksize[1] = 11; - - venc->ncodebooks = FF_ARRAY_ELEMS(cvectors); - venc->codebooks = av_malloc(sizeof(vorbis_enc_codebook) * venc->ncodebooks); - if (!venc->codebooks) - return AVERROR(ENOMEM); - - // codebook 0..14 - floor1 book, values 0..255 - // codebook 15 residue masterbook - // codebook 16..29 residue - for (book = 0; book < venc->ncodebooks; book++) { - vorbis_enc_codebook *cb = &venc->codebooks[book]; - int vals; - cb->ndimensions = 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); - if (!cb->lens || !cb->codewords) - return AVERROR(ENOMEM); - 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->ndimensions, cb->nentries); - cb->quantlist = av_malloc(sizeof(int) * vals); - if (!cb->quantlist) - return AVERROR(ENOMEM); - for (i = 0; i < vals; i++) - cb->quantlist[i] = cvectors[book].quant[i]; - } else { - cb->quantlist = NULL; - } - if ((ret = ready_codebook(cb)) < 0) - return ret; - } - - venc->nfloors = 1; - venc->floors = av_malloc(sizeof(vorbis_enc_floor) * venc->nfloors); - if (!venc->floors) - return AVERROR(ENOMEM); - - // just 1 floor - fc = &venc->floors[0]; - fc->partitions = NUM_FLOOR_PARTITIONS; - fc->partition_to_class = av_malloc(sizeof(int) * fc->partitions); - if (!fc->partition_to_class) - return AVERROR(ENOMEM); - 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(vorbis_enc_floor_class) * fc->nclasses); - if (!fc->classes) - return AVERROR(ENOMEM); - for (i = 0; i < fc->nclasses; i++) { - vorbis_enc_floor_class * 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); - if (!c->books) - return AVERROR(ENOMEM); - 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(vorbis_floor1_entry) * fc->values); - if (!fc->list) - return AVERROR(ENOMEM); - 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]; - } - if (ff_vorbis_ready_floor1_list(avctx, fc->list, fc->values)) - return AVERROR_BUG; - - venc->nresidues = 1; - venc->residues = av_malloc(sizeof(vorbis_enc_residue) * venc->nresidues); - if (!venc->residues) - return AVERROR(ENOMEM); - - // 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); - if (!rc->books) - return AVERROR(ENOMEM); - { - 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); - } - if ((ret = ready_residue(rc, venc)) < 0) - return ret; - - venc->nmappings = 1; - venc->mappings = av_malloc(sizeof(vorbis_enc_mapping) * venc->nmappings); - if (!venc->mappings) - return AVERROR(ENOMEM); - - // single mapping - mc = &venc->mappings[0]; - mc->submaps = 1; - mc->mux = av_malloc(sizeof(int) * venc->channels); - if (!mc->mux) - return AVERROR(ENOMEM); - 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); - if (!mc->floor || !mc->residue) - return AVERROR(ENOMEM); - 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->magnitude || !mc->angle) - return AVERROR(ENOMEM); - if (mc->coupling_steps) { - mc->magnitude[0] = 0; - mc->angle[0] = 1; - } - - venc->nmodes = 1; - venc->modes = av_malloc(sizeof(vorbis_enc_mode) * venc->nmodes); - if (!venc->modes) - return AVERROR(ENOMEM); - - // 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); - if (!venc->saved || !venc->samples || !venc->floor || !venc->coeffs) - return AVERROR(ENOMEM); - - venc->win[0] = ff_vorbis_vwin[venc->log2_blocksize[0] - 6]; - venc->win[1] = ff_vorbis_vwin[venc->log2_blocksize[1] - 6]; - - if ((ret = ff_mdct_init(&venc->mdct[0], venc->log2_blocksize[0], 0, 1.0)) < 0) - return ret; - if ((ret = ff_mdct_init(&venc->mdct[1], venc->log2_blocksize[1], 0, 1.0)) < 0) - return ret; - - return 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 |= (1U << 31); - mant = -mant; - } - res |= mant | (exp << 21); - put_bits32(pb, res); -} - -static void put_codebook_header(PutBitContext *pb, vorbis_enc_codebook *cb) -{ - int i; - int ordered = 0; - - put_bits(pb, 24, 0x564342); //magic - put_bits(pb, 16, cb->ndimensions); - 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->ndimensions, 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, vorbis_enc_floor *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, vorbis_enc_residue *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(vorbis_enc_context *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_bits32(&pb, 0); // version - put_bits(&pb, 8, venc->channels); - put_bits32(&pb, venc->sample_rate); - put_bits32(&pb, 0); // bitrate - put_bits32(&pb, 0); // bitrate - put_bits32(&pb, 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) >> 3; - 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_bits32(&pb, 0); // vendor length TODO - put_bits32(&pb, 0); // amount of comments - put_bits(&pb, 1, 1); // framing - - flush_put_bits(&pb); - hlens[1] = put_bits_count(&pb) >> 3; - 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++) { - vorbis_enc_mapping *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) >> 3; - - len = hlens[0] + hlens[1] + hlens[2]; - p = *out = av_mallocz(64 + len + len/255); - if (!p) - return AVERROR(ENOMEM); - - *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(vorbis_enc_floor * 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(vorbis_enc_context *venc, vorbis_enc_floor *fc, - float *coeffs, uint16_t *posts, int samples) -{ - int range = 255 / fc->multiplier + 1; - int i; - float tot_average = 0.0; - float averages[MAX_FLOOR_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 = sqrt(tot_average * average) * pow(1.25f, position*0.005f); // 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 int floor_encode(vorbis_enc_context *venc, vorbis_enc_floor *fc, - PutBitContext *pb, uint16_t *posts, - float *floor, int samples) -{ - int range = 255 / fc->multiplier + 1; - int coded[MAX_FLOOR_VALUES]; // first 2 values are unused - int i, counter; - - if (pb->size_in_bits - put_bits_count(pb) < 1 + 2 * ilog(range - 1)) - return AVERROR(EINVAL); - 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++) { - vorbis_enc_floor_class * c = &fc->classes[fc->partition_to_class[i]]; - int k, cval = 0, csub = 1<<c->subclass; - if (c->subclass) { - vorbis_enc_codebook * 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 that is 0 - if (coded[counter + k] < maxval) - break; - } - assert(l != csub); - cval |= l << cshift; - cshift += c->subclass; - } - if (put_codeword(pb, book, cval)) - return AVERROR(EINVAL); - } - 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; - if (put_codeword(pb, &venc->codebooks[book], entry)) - return AVERROR(EINVAL); - } - } - - ff_vorbis_floor1_render_list(fc->list, fc->values, posts, coded, - fc->multiplier, floor, samples); - - return 0; -} - -static float *put_vector(vorbis_enc_codebook *book, PutBitContext *pb, - float *num) -{ - int i, entry = -1; - float distance = FLT_MAX; - assert(book->dimensions); - for (i = 0; i < book->nentries; i++) { - float * vec = book->dimensions + i * book->ndimensions, d = book->pow2[i]; - int j; - if (!book->lens[i]) - continue; - for (j = 0; j < book->ndimensions; j++) - d -= vec[j] * num[j]; - if (distance > d) { - entry = i; - distance = d; - } - } - if (put_codeword(pb, book, entry)) - return NULL; - return &book->dimensions[entry * book->ndimensions]; -} - -static int residue_encode(vorbis_enc_context *venc, vorbis_enc_residue *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[MAX_CHANNELS][NUM_RESIDUE_PARTITIONS]; - int classwords = venc->codebooks[rc->classbook].ndimensions; - - av_assert0(rc->type == 2); - av_assert0(real_ch == 2); - for (p = 0; p < partitions; p++) { - float max1 = 0.0, max2 = 0.0; - 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++) { - vorbis_enc_codebook * book = &venc->codebooks[rc->classbook]; - int entry = 0; - for (i = 0; i < classwords; i++) { - entry *= rc->classifications; - entry += classes[j][p + i]; - } - if (put_codeword(pb, book, entry)) - return AVERROR(EINVAL); - } - for (i = 0; i < classwords && p < partitions; i++, p++) { - for (j = 0; j < channels; j++) { - int nbook = rc->books[classes[j][p]][pass]; - vorbis_enc_codebook * 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->ndimensions)); - - if (rc->type == 0) { - for (k = 0; k < psize; k += book->ndimensions) { - int l; - float *a = put_vector(book, pb, &buf[k]); - if (!a) - return AVERROR(EINVAL); - for (l = 0; l < book->ndimensions; 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->ndimensions) { - int dim, a2 = a1, b2 = b1; - float vec[MAX_CODEBOOK_DIM], *pv = vec; - for (dim = book->ndimensions; dim--; ) { - *pv++ = coeffs[a2 + b2]; - if ((a2 += samples) == s) { - a2 = 0; - b2++; - } - } - pv = put_vector(book, pb, vec); - if (!pv) - return AVERROR(EINVAL); - for (dim = book->ndimensions; dim--; ) { - coeffs[a1 + b1] -= *pv++; - if ((a1 += samples) == s) { - a1 = 0; - b1++; - } - } - } - } - } - } - } - } - return 0; -} - -static int apply_window_and_mdct(vorbis_enc_context *venc, - float **audio, int samples) -{ - int i, channel; - const float * win = venc->win[0]; - int window_len = 1 << (venc->log2_blocksize[0] - 1); - float n = (float)(1 << venc->log2_blocksize[0]) / 4.0; - // 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; - for (i = 0; i < samples; i++) - offset[i] = audio[channel][i] / n * win[window_len - i - 1]; - } - } 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++) - venc->mdct[0].mdct_calc(&venc->mdct[0], venc->coeffs + channel * window_len, - venc->samples + channel * window_len * 2); - - if (samples) { - for (channel = 0; channel < venc->channels; channel++) { - float *offset = venc->saved + channel * window_len; - for (i = 0; i < samples; i++) - offset[i] = audio[channel][i] / n * win[i]; - } - venc->have_saved = 1; - } else { - venc->have_saved = 0; - } - return 1; -} - -static int vorbis_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, - const AVFrame *frame, int *got_packet_ptr) -{ - vorbis_enc_context *venc = avctx->priv_data; - float **audio = frame ? (float **)frame->extended_data : NULL; - int samples = frame ? frame->nb_samples : 0; - vorbis_enc_mode *mode; - vorbis_enc_mapping *mapping; - PutBitContext pb; - int i, ret; - - if (!apply_window_and_mdct(venc, audio, samples)) - return 0; - samples = 1 << (venc->log2_blocksize[0] - 1); - - if ((ret = ff_alloc_packet2(avctx, avpkt, 8192)) < 0) - return ret; - - init_put_bits(&pb, avpkt->data, avpkt->size); - - if (pb.size_in_bits - put_bits_count(&pb) < 1 + ilog(venc->nmodes - 1)) { - av_log(avctx, AV_LOG_ERROR, "output buffer is too small\n"); - return AVERROR(EINVAL); - } - - 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++) { - vorbis_enc_floor *fc = &venc->floors[mapping->floor[mapping->mux[i]]]; - uint16_t posts[MAX_FLOOR_VALUES]; - floor_fit(venc, fc, &venc->coeffs[i * samples], posts, samples); - if (floor_encode(venc, fc, &pb, posts, &venc->floor[i * samples], samples)) { - av_log(avctx, AV_LOG_ERROR, "output buffer is too small\n"); - return AVERROR(EINVAL); - } - } - - 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; - } - } - - if (residue_encode(venc, &venc->residues[mapping->residue[mapping->mux[0]]], - &pb, venc->coeffs, samples, venc->channels)) { - av_log(avctx, AV_LOG_ERROR, "output buffer is too small\n"); - return AVERROR(EINVAL); - } - - flush_put_bits(&pb); - avpkt->size = put_bits_count(&pb) >> 3; - - avpkt->duration = ff_samples_to_time_base(avctx, avctx->frame_size); - if (frame) { - if (frame->pts != AV_NOPTS_VALUE) - avpkt->pts = ff_samples_to_time_base(avctx, frame->pts); - } else - avpkt->pts = venc->next_pts; - if (avpkt->pts != AV_NOPTS_VALUE) - venc->next_pts = avpkt->pts + avpkt->duration; - - *got_packet_ptr = 1; - return 0; -} - - -static av_cold int vorbis_encode_close(AVCodecContext *avctx) -{ - vorbis_enc_context *venc = avctx->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].dimensions); - 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(&avctx->extradata); - - return 0 ; -} - -static av_cold int vorbis_encode_init(AVCodecContext *avctx) -{ - vorbis_enc_context *venc = avctx->priv_data; - int ret; - - if (avctx->channels != 2) { - av_log(avctx, AV_LOG_ERROR, "Current FFmpeg Vorbis encoder only supports 2 channels.\n"); - return -1; - } - - if ((ret = create_vorbis_context(venc, avctx)) < 0) - goto error; - - avctx->bit_rate = 0; - if (avctx->flags & CODEC_FLAG_QSCALE) - venc->quality = avctx->global_quality / (float)FF_QP2LAMBDA; - else - venc->quality = 8; - venc->quality *= venc->quality; - - if ((ret = put_main_header(venc, (uint8_t**)&avctx->extradata)) < 0) - goto error; - avctx->extradata_size = ret; - - avctx->frame_size = 1 << (venc->log2_blocksize[0] - 1); - - return 0; -error: - vorbis_encode_close(avctx); - return ret; -} - -AVCodec ff_vorbis_encoder = { - .name = "vorbis", - .long_name = NULL_IF_CONFIG_SMALL("Vorbis"), - .type = AVMEDIA_TYPE_AUDIO, - .id = AV_CODEC_ID_VORBIS, - .priv_data_size = sizeof(vorbis_enc_context), - .init = vorbis_encode_init, - .encode2 = vorbis_encode_frame, - .close = vorbis_encode_close, - .capabilities = CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL, - .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP, - AV_SAMPLE_FMT_NONE }, -}; |