/**
* @file vorbis.c
- * Vorbis I decoder
+ * Common code for Vorbis I encoder and decoder
* @author Denes Balatoni ( dbalatoni programozo hu )
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#undef V_DEBUG
-
-#include <math.h>
+//#define V_DEBUG
#define ALT_BITSTREAM_READER_LE
#include "avcodec.h"
#include "bitstream.h"
-#include "dsputil.h"
#include "vorbis.h"
-#define V_NB_BITS 8
-#define V_NB_BITS2 11
-#define V_MAX_VLCS (1<<16)
-
-#ifndef V_DEBUG
-#define AV_DEBUG(...)
-#endif
-
-#undef NDEBUG
-#include <assert.h>
/* Helper functions */
-/**
- * reads 0-32 bits when using the ALT_BITSTREAM_READER_LE bitstream reader
- */
-unsigned int get_bits_long_le(GetBitContext *s, int n){
- if(n<=17) return get_bits(s, n);
- else{
- int ret= get_bits(s, 16);
- return ret | (get_bits(s, n-16) << 16);
- }
-}
-
-#define ilog(i) av_log2(2*(i))
-
-static unsigned int nth_root(unsigned int x, unsigned int n) { // x^(1/n)
+unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n) { // x^(1/n)
unsigned int ret=0, i, j;
do {
return (ret-1);
}
-static float vorbisfloat2float(uint_fast32_t val) {
- double mant=val&0x1fffff;
- long exp=(val&0x7fe00000L)>>21;
- if (val&0x80000000) mant=-mant;
- return(ldexp(mant, exp-20-768));
-}
-
-
// Generate vlc codes from vorbis huffman code lengths
-static int vorbis_len2vlc(vorbis_context *vc, uint_fast8_t *bits, uint_fast32_t *codes, uint_fast32_t num) {
+int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, uint_fast32_t num) {
uint_fast32_t exit_at_level[33]={404,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
}
#ifdef V_DEBUG
- av_log(vc->avccontext, AV_LOG_INFO, " %d. of %d code len %d code %d - ", p, num, bits[p], codes[p]);
+ av_log(NULL, AV_LOG_INFO, " %d. of %d code len %d code %d - ", p, num, bits[p], codes[p]);
init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
for(i=0;i<bits[p];++i) {
- av_log(vc->avccontext, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
+ av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
}
- av_log(vc->avccontext, AV_LOG_INFO, "\n");
+ av_log(NULL, AV_LOG_INFO, "\n");
#endif
++p;
codes[p]=code;
#ifdef V_DEBUG
- av_log(vc->avccontext, AV_LOG_INFO, " %d. code len %d code %d - ", p, bits[p], codes[p]);
+ av_log(NULL, AV_LOG_INFO, " %d. code len %d code %d - ", p, bits[p], codes[p]);
init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
for(i=0;i<bits[p];++i) {
- av_log(vc->avccontext, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
+ av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
}
- av_log(vc->avccontext, AV_LOG_INFO, "\n");
+ av_log(NULL, AV_LOG_INFO, "\n");
#endif
}
- //FIXME no exits should be left (underspecified tree - ie. unused valid vlcs - not allowed by SPEC)
+ //no exits should be left (underspecified tree - ie. unused valid vlcs - not allowed by SPEC)
+ for (p=1; p<33; p++)
+ if (exit_at_level[p]) return 1;
return 0;
}
-// Free all allocated memory -----------------------------------------
-
-static void vorbis_free(vorbis_context *vc) {
- int_fast16_t i;
-
- av_freep(&vc->channel_residues);
- av_freep(&vc->channel_floors);
- av_freep(&vc->saved);
- av_freep(&vc->ret);
- av_freep(&vc->buf);
- av_freep(&vc->buf_tmp);
-
- av_freep(&vc->residues);
- av_freep(&vc->modes);
-
- ff_mdct_end(&vc->mdct0);
- ff_mdct_end(&vc->mdct1);
-
- for(i=0;i<vc->codebook_count;++i) {
- av_free(vc->codebooks[i].codevectors);
- free_vlc(&vc->codebooks[i].vlc);
- }
- av_freep(&vc->codebooks);
-
- for(i=0;i<vc->floor_count;++i) {
- av_free(vc->floors[i].x_list);
- av_free(vc->floors[i].x_list_order);
- av_free(vc->floors[i].low_neighbour);
- av_free(vc->floors[i].high_neighbour);
- }
- av_freep(&vc->floors);
-
- for(i=0;i<vc->mapping_count;++i) {
- av_free(vc->mappings[i].magnitude);
- av_free(vc->mappings[i].angle);
- av_free(vc->mappings[i].mux);
- }
- av_freep(&vc->mappings);
-}
-
-// Parse setup header -------------------------------------------------
-
-// Process codebooks part
-
-static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
- uint_fast16_t cb;
- uint_fast8_t *tmp_vlc_bits;
- uint_fast32_t *tmp_vlc_codes;
- GetBitContext *gb=&vc->gb;
-
- vc->codebook_count=get_bits(gb,8)+1;
-
- AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
-
- vc->codebooks=(vorbis_codebook *)av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
- tmp_vlc_bits=(uint_fast8_t *)av_mallocz(V_MAX_VLCS * sizeof(uint_fast8_t));
- tmp_vlc_codes=(uint_fast32_t *)av_mallocz(V_MAX_VLCS * sizeof(uint_fast32_t));
-
- for(cb=0;cb<vc->codebook_count;++cb) {
- vorbis_codebook *codebook_setup=&vc->codebooks[cb];
- uint_fast8_t ordered;
- uint_fast32_t t, used_entries=0;
- uint_fast32_t entries;
-
- AV_DEBUG(" %d. Codebook \n", cb);
-
- if (get_bits(gb, 24)!=0x564342) {
- av_log(vc->avccontext, AV_LOG_ERROR, " %d. Codebook setup data corrupt. \n", cb);
- goto error;
- }
-
- codebook_setup->dimensions=get_bits(gb, 16);
- if (codebook_setup->dimensions>16) {
- av_log(vc->avccontext, AV_LOG_ERROR, " %d. Codebook's dimension is too large (%d). \n", cb, codebook_setup->dimensions);
- goto error;
- }
- entries=get_bits(gb, 24);
- if (entries>V_MAX_VLCS) {
- av_log(vc->avccontext, AV_LOG_ERROR, " %d. Codebook has too many entries (%d). \n", cb, entries);
- goto error;
- }
-
- ordered=get_bits1(gb);
-
- AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries);
-
- if (!ordered) {
- uint_fast16_t ce;
- uint_fast8_t flag;
- uint_fast8_t sparse=get_bits1(gb);
-
- AV_DEBUG(" not ordered \n");
-
- if (sparse) {
- AV_DEBUG(" sparse \n");
-
- used_entries=0;
- for(ce=0;ce<entries;++ce) {
- flag=get_bits1(gb);
- if (flag) {
- tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
- ++used_entries;
- }
- else tmp_vlc_bits[ce]=0;
- }
+void ff_vorbis_ready_floor1_list(floor1_entry_t * list, int values) {
+ int i;
+ list[0].sort = 0;
+ list[1].sort = 1;
+ for (i = 2; i < values; i++) {
+ int j;
+ list[i].low = 0;
+ list[i].high = 1;
+ list[i].sort = i;
+ for (j = 2; j < i; j++) {
+ int tmp = list[j].x;
+ if (tmp < list[i].x) {
+ if (tmp > list[list[i].low].x) list[i].low = j;
} else {
- AV_DEBUG(" not sparse \n");
-
- used_entries=entries;
- for(ce=0;ce<entries;++ce) {
- tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
- }
- }
+ if (tmp < list[list[i].high].x) list[i].high = j;
+ }
+ }
+ }
+ for (i = 0; i < values - 1; i++) {
+ int j;
+ for (j = i + 1; j < values; j++) {
+ if (list[list[i].sort].x > list[list[j].sort].x) {
+ int tmp = list[i].sort;
+ list[i].sort = list[j].sort;
+ list[j].sort = tmp;
+ }
+ }
+ }
+}
+
+static void render_line(int x0, int y0, int x1, int y1, float * buf, int n) {
+ int dy = y1 - y0;
+ int adx = x1 - x0;
+ int ady = FFABS(dy);
+ int base = dy / adx;
+ int x = x0;
+ int y = y0;
+ int err = 0;
+ int sy;
+ if (dy < 0) sy = base - 1;
+ else sy = base + 1;
+ ady = ady - FFABS(base) * adx;
+ if (x >= n) return;
+ buf[x] = ff_vorbis_floor1_inverse_db_table[y];
+ for (x = x0 + 1; x < x1; x++) {
+ if (x >= n) return;
+ err += ady;
+ if (err >= adx) {
+ err -= adx;
+ y += sy;
} else {
- uint_fast16_t current_entry=0;
- uint_fast8_t current_length=get_bits(gb, 5)+1;
-
- AV_DEBUG(" ordered, current length: %d \n", current_length); //FIXME
-
- used_entries=entries;
- for(;current_entry<used_entries;++current_length) {
- uint_fast16_t i, number;
-
- AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
-
- number=get_bits(gb, ilog(entries - current_entry));
-
- AV_DEBUG(" number: %d \n", number);
-
- for(i=current_entry;i<number+current_entry;++i) {
- if (i<used_entries) tmp_vlc_bits[i]=current_length;
- }
-
- current_entry+=number;
- }
- if (current_entry>used_entries) {
- av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
- goto error;
- }
- }
-
- codebook_setup->lookup_type=get_bits(gb, 4);
-
- AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup" );
-
-// If the codebook is used for (inverse) VQ, calculate codevectors.
-
- if (codebook_setup->lookup_type==1) {
- uint_fast16_t i, j, k;
- uint_fast16_t codebook_lookup_values=nth_root(entries, codebook_setup->dimensions);
- uint_fast16_t codebook_multiplicands[codebook_lookup_values];
-
- float codebook_minimum_value=vorbisfloat2float(get_bits_long_le(gb, 32));
- float codebook_delta_value=vorbisfloat2float(get_bits_long_le(gb, 32));
- uint_fast8_t codebook_value_bits=get_bits(gb, 4)+1;
- uint_fast8_t codebook_sequence_p=get_bits1(gb);
-
- AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
- AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
-
- for(i=0;i<codebook_lookup_values;++i) {
- codebook_multiplicands[i]=get_bits(gb, codebook_value_bits);
-
- AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
- AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
- }
-
-// Weed out unused vlcs and build codevector vector
- codebook_setup->codevectors=(float *)av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float));
- for(j=0, i=0;i<entries;++i) {
- uint_fast8_t dim=codebook_setup->dimensions;
-
- if (tmp_vlc_bits[i]) {
- float last=0.0;
- uint_fast32_t lookup_offset=i;
-
-#ifdef V_DEBUG
- av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
-#endif
-
- for(k=0;k<dim;++k) {
- uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
- codebook_setup->codevectors[j*dim+k]=codebook_multiplicands[multiplicand_offset]*codebook_delta_value+codebook_minimum_value+last;
- if (codebook_sequence_p) {
- last=codebook_setup->codevectors[j*dim+k];
- }
- lookup_offset/=codebook_lookup_values;
- }
- tmp_vlc_bits[j]=tmp_vlc_bits[i];
-
-#ifdef V_DEBUG
- av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
- for(k=0;k<dim;++k) {
- av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j*dim+k]);
- }
- av_log(vc->avccontext, AV_LOG_INFO, "\n");
-#endif
-
- ++j;
- }
- }
- if (j!=used_entries) {
- av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
- goto error;
- }
- entries=used_entries;
- }
- else if (codebook_setup->lookup_type>=2) {
- av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
- goto error;
- }
-
-// Initialize VLC table
- if (vorbis_len2vlc(vc, tmp_vlc_bits, tmp_vlc_codes, entries)) {
- av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
- goto error;
- }
- codebook_setup->maxdepth=0;
- for(t=0;t<entries;++t)
- if (tmp_vlc_bits[t]>=codebook_setup->maxdepth) codebook_setup->maxdepth=tmp_vlc_bits[t];
-
- if(codebook_setup->maxdepth > 3*V_NB_BITS) codebook_setup->nb_bits=V_NB_BITS2;
- else codebook_setup->nb_bits=V_NB_BITS;
-
- codebook_setup->maxdepth=(codebook_setup->maxdepth+codebook_setup->nb_bits-1)/codebook_setup->nb_bits;
-
- if (init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits, entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits), sizeof(*tmp_vlc_bits), tmp_vlc_codes, sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes), INIT_VLC_LE)) {
- av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
- goto error;
+ y += base;
}
+ buf[x] = ff_vorbis_floor1_inverse_db_table[y];
}
-
- av_free(tmp_vlc_bits);
- av_free(tmp_vlc_codes);
- return 0;
-
-// Error:
-error:
- av_free(tmp_vlc_bits);
- av_free(tmp_vlc_codes);
- return 1;
}
-// Process time domain transforms part (unused in Vorbis I)
-
-static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) {
- GetBitContext *gb=&vc->gb;
- uint_fast8_t i;
- uint_fast8_t vorbis_time_count=get_bits(gb, 6)+1;
-
- for(i=0;i<vorbis_time_count;++i) {
- uint_fast16_t vorbis_tdtransform=get_bits(gb, 16);
-
- AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform);
-
- if (vorbis_tdtransform) {
- av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
- return 1;
+void ff_vorbis_floor1_render_list(floor1_entry_t * list, int values, uint_fast16_t * y_list, int * flag, int multiplier, float * out, int samples) {
+ int lx, ly, i;
+ lx = 0;
+ ly = y_list[0] * multiplier;
+ for (i = 1; i < values; i++) {
+ int pos = list[i].sort;
+ if (flag[pos]) {
+ render_line(lx, ly, list[pos].x, y_list[pos] * multiplier, out, samples);
+ lx = list[pos].x;
+ ly = y_list[pos] * multiplier;
}
+ if (lx >= samples) break;
}
- return 0;
-}
-
-// Process floors part - only floor type 1 is supported
-
-static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) {
- GetBitContext *gb=&vc->gb;
- uint_fast16_t i,j,k;
-
- vc->floor_count=get_bits(gb, 6)+1;
-
- vc->floors=(vorbis_floor *)av_mallocz(vc->floor_count * sizeof(vorbis_floor));
-
- for (i=0;i<vc->floor_count;++i) {
- vorbis_floor *floor_setup=&vc->floors[i];
-
- floor_setup->floor_type=get_bits(gb, 16);
-
- AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
-
- if (floor_setup->floor_type==1) {
- uint_fast8_t maximum_class=0;
- uint_fast8_t rangebits;
- uint_fast16_t floor1_values=2;
-
- floor_setup->partitions=get_bits(gb, 5);
-
- AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->partitions);
-
- for(j=0;j<floor_setup->partitions;++j) {
- floor_setup->partition_class[j]=get_bits(gb, 4);
- if (floor_setup->partition_class[j]>maximum_class) maximum_class=floor_setup->partition_class[j];
-
- AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->partition_class[j]);
-
- }
-
- AV_DEBUG(" maximum class %d \n", maximum_class);
-
- floor_setup->maximum_class=maximum_class;
-
- for(j=0;j<=maximum_class;++j) {
- floor_setup->class_dimensions[j]=get_bits(gb, 3)+1;
- floor_setup->class_subclasses[j]=get_bits(gb, 2);
-
- AV_DEBUG(" %d floor %d class dim: %d subclasses %d \n", i, j, floor_setup->class_dimensions[j], floor_setup->class_subclasses[j]);
-
- if (floor_setup->class_subclasses[j]) {
- floor_setup->class_masterbook[j]=get_bits(gb, 8);
-
- AV_DEBUG(" masterbook: %d \n", floor_setup->class_masterbook[j]);
- }
-
- for(k=0;k<(1<<floor_setup->class_subclasses[j]);++k) {
- floor_setup->subclass_books[j][k]=get_bits(gb, 8)-1;
-
- AV_DEBUG(" book %d. : %d \n", k, floor_setup->subclass_books[j][k]);
- }
- }
-
- floor_setup->multiplier=get_bits(gb, 2)+1;
- floor_setup->x_list_dim=2;
-
- for(j=0;j<floor_setup->partitions;++j) {
- floor_setup->x_list_dim+=floor_setup->class_dimensions[floor_setup->partition_class[j]];
- }
-
- floor_setup->x_list=(uint_fast16_t *)av_mallocz(floor_setup->x_list_dim * sizeof(uint_fast16_t));
- floor_setup->x_list_order=(uint_fast16_t *)av_mallocz(floor_setup->x_list_dim * sizeof(uint_fast16_t));
- floor_setup->low_neighbour=(uint_fast16_t *)av_mallocz(floor_setup->x_list_dim * sizeof(uint_fast16_t));
- floor_setup->high_neighbour=(uint_fast16_t *)av_mallocz(floor_setup->x_list_dim * sizeof(uint_fast16_t));
-
-
- rangebits=get_bits(gb, 4);
- floor_setup->x_list[0] = 0;
- floor_setup->x_list[1] = (1<<rangebits);
-
- for(j=0;j<floor_setup->partitions;++j) {
- for(k=0;k<floor_setup->class_dimensions[floor_setup->partition_class[j]];++k,++floor1_values) {
- floor_setup->x_list[floor1_values]=get_bits(gb, rangebits);
-
- AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->x_list[floor1_values]);
- }
- }
-
-// Precalculate order of x coordinates - needed for decode
-
- for(k=0;k<floor_setup->x_list_dim;++k) {
- floor_setup->x_list_order[k]=k;
- }
-
- for(k=0;k<floor_setup->x_list_dim-1;++k) { // FIXME optimize sorting ?
- for(j=k+1;j<floor_setup->x_list_dim;++j) {
- if(floor_setup->x_list[floor_setup->x_list_order[k]]>floor_setup->x_list[floor_setup->x_list_order[j]]) {
- uint_fast16_t tmp=floor_setup->x_list_order[k];
- floor_setup->x_list_order[k]=floor_setup->x_list_order[j];
- floor_setup->x_list_order[j]=tmp;
- }
- }
- }
-
-// Precalculate low and high neighbours
-
- for(k=2;k<floor_setup->x_list_dim;++k) {
- floor_setup->low_neighbour[k]=0;
- floor_setup->high_neighbour[k]=1; // correct according to SPEC requirements
-
- for (j=0;j<k;++j) {
- if ((floor_setup->x_list[j]<floor_setup->x_list[k]) &&
- (floor_setup->x_list[j]>floor_setup->x_list[floor_setup->low_neighbour[k]])) {
- floor_setup->low_neighbour[k]=j;
- }
- if ((floor_setup->x_list[j]>floor_setup->x_list[k]) &&
- (floor_setup->x_list[j]<floor_setup->x_list[floor_setup->high_neighbour[k]])) {
- floor_setup->high_neighbour[k]=j;
- }
- }
- }
- }
- else {
- av_log(vc->avccontext, AV_LOG_ERROR, "Only floor type 1 supported. \n");
- return 1;
- }
- }
- return 0;
-}
-
-// Process residues part
-
-static int vorbis_parse_setup_hdr_residues(vorbis_context *vc){
- GetBitContext *gb=&vc->gb;
- uint_fast8_t i, j, k;
-
- vc->residue_count=get_bits(gb, 6)+1;
- vc->residues=(vorbis_residue *)av_mallocz(vc->residue_count * sizeof(vorbis_residue));
-
- AV_DEBUG(" There are %d residues. \n", vc->residue_count);
-
- for(i=0;i<vc->residue_count;++i) {
- vorbis_residue *res_setup=&vc->residues[i];
- uint_fast8_t cascade[64];
- uint_fast8_t high_bits;
- uint_fast8_t low_bits;
-
- res_setup->type=get_bits(gb, 16);
-
- AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
-
- res_setup->begin=get_bits(gb, 24);
- res_setup->end=get_bits(gb, 24);
- res_setup->partition_size=get_bits(gb, 24)+1;
- res_setup->classifications=get_bits(gb, 6)+1;
- res_setup->classbook=get_bits(gb, 8);
-
- AV_DEBUG(" begin %d end %d part.size %d classif.s %d classbook %d \n", res_setup->begin, res_setup->end, res_setup->partition_size,
- res_setup->classifications, res_setup->classbook);
-
- for(j=0;j<res_setup->classifications;++j) {
- high_bits=0;
- low_bits=get_bits(gb, 3);
- if (get_bits1(gb)) {
- high_bits=get_bits(gb, 5);
- }
- cascade[j]=(high_bits<<3)+low_bits;
-
- AV_DEBUG(" %d class casscade depth: %d \n", j, ilog(cascade[j]));
- }
-
- res_setup->maxpass=0;
- for(j=0;j<res_setup->classifications;++j) {
- for(k=0;k<8;++k) {
- if (cascade[j]&(1<<k)) {
- res_setup->books[j][k]=get_bits(gb, 8);
-
- AV_DEBUG(" %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
-
- if (k>res_setup->maxpass) {
- res_setup->maxpass=k;
- }
- } else {
- res_setup->books[j][k]=-1;
- }
- }
- }
- }
- return 0;
-}
-
-// Process mappings part
-
-static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) {
- GetBitContext *gb=&vc->gb;
- uint_fast8_t i, j;
-
- vc->mapping_count=get_bits(gb, 6)+1;
- vc->mappings=(vorbis_mapping *)av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
-
- AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
-
- for(i=0;i<vc->mapping_count;++i) {
- vorbis_mapping *mapping_setup=&vc->mappings[i];
-
- if (get_bits(gb, 16)) {
- av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
- return 1;
- }
- if (get_bits1(gb)) {
- mapping_setup->submaps=get_bits(gb, 4)+1;
- } else {
- mapping_setup->submaps=1;
- }
-
- if (get_bits1(gb)) {
- mapping_setup->coupling_steps=get_bits(gb, 8)+1;
- mapping_setup->magnitude=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
- mapping_setup->angle=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
- for(j=0;j<mapping_setup->coupling_steps;++j) {
- mapping_setup->magnitude[j]=get_bits(gb, ilog(vc->audio_channels-1));
- mapping_setup->angle[j]=get_bits(gb, ilog(vc->audio_channels-1));
- // FIXME: sanity checks
- }
- } else {
- mapping_setup->coupling_steps=0;
- }
-
- AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
-
- if(get_bits(gb, 2)) {
- av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
- return 1; // following spec.
- }
-
- if (mapping_setup->submaps>1) {
- mapping_setup->mux=(uint_fast8_t *)av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
- for(j=0;j<vc->audio_channels;++j) {
- mapping_setup->mux[j]=get_bits(gb, 4);
- }
- }
-
- for(j=0;j<mapping_setup->submaps;++j) {
- get_bits(gb, 8); // FIXME check?
- mapping_setup->submap_floor[j]=get_bits(gb, 8);
- mapping_setup->submap_residue[j]=get_bits(gb, 8);
-
- AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]);
- }
- }
- return 0;
-}
-
-// Process modes part
-
-static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) {
- GetBitContext *gb=&vc->gb;
- uint_fast8_t i;
-
- vc->mode_count=get_bits(gb, 6)+1;
- vc->modes=(vorbis_mode *)av_mallocz(vc->mode_count * sizeof(vorbis_mode));
-
- AV_DEBUG(" There are %d modes.\n", vc->mode_count);
-
- for(i=0;i<vc->mode_count;++i) {
- vorbis_mode *mode_setup=&vc->modes[i];
-
- mode_setup->blockflag=get_bits(gb, 1);
- mode_setup->windowtype=get_bits(gb, 16); //FIXME check
- mode_setup->transformtype=get_bits(gb, 16); //FIXME check
- mode_setup->mapping=get_bits(gb, 8); //FIXME check
-
- AV_DEBUG(" %d mode: blockflag %d, windowtype %d, transformtype %d, mapping %d \n", i, mode_setup->blockflag, mode_setup->windowtype, mode_setup->transformtype, mode_setup->mapping);
- }
- return 0;
-}
-
-// Process the whole setup header using the functions above
-
-static int vorbis_parse_setup_hdr(vorbis_context *vc) {
- GetBitContext *gb=&vc->gb;
-
- if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
- (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
- (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
- av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
- return 1;
- }
-
- if (vorbis_parse_setup_hdr_codebooks(vc)) {
- av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
- return 2;
- }
- if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
- av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
- return 3;
- }
- if (vorbis_parse_setup_hdr_floors(vc)) {
- av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
- return 4;
- }
- if (vorbis_parse_setup_hdr_residues(vc)) {
- av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
- return 5;
- }
- if (vorbis_parse_setup_hdr_mappings(vc)) {
- av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
- return 6;
- }
- if (vorbis_parse_setup_hdr_modes(vc)) {
- av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
- return 7;
- }
- if (!get_bits1(gb)) {
- av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
- return 8; // framing flag bit unset error
- }
-
- return 0;
+ if (lx < samples) render_line(lx, ly, samples, ly, out, samples);
}
-
-// Process the identification header
-
-static int vorbis_parse_id_hdr(vorbis_context *vc){
- GetBitContext *gb=&vc->gb;
- uint_fast8_t bl0, bl1;
- const float *vwin[8]={ vwin64, vwin128, vwin256, vwin512, vwin1024, vwin2048, vwin4096, vwin8192 };
-
- if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
- (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
- (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
- av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
- return 1;
- }
-
- vc->version=get_bits_long_le(gb, 32); //FIXME check 0
- vc->audio_channels=get_bits(gb, 8); //FIXME check >0
- vc->audio_samplerate=get_bits_long_le(gb, 32); //FIXME check >0
- vc->bitrate_maximum=get_bits_long_le(gb, 32);
- vc->bitrate_nominal=get_bits_long_le(gb, 32);
- vc->bitrate_minimum=get_bits_long_le(gb, 32);
- bl0=get_bits(gb, 4);
- bl1=get_bits(gb, 4);
- vc->blocksize_0=(1<<bl0);
- vc->blocksize_1=(1<<bl1);
- if (bl0>13 || bl0<6 || bl1>13 || bl1<6) {
- av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
- return 3;
- }
- vc->swin=vwin[bl0-6];
- vc->lwin=vwin[bl1-6];
-
- if ((get_bits1(gb)) == 0) {
- av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
- return 2;
- }
-
- vc->channel_residues=(float *)av_malloc((vc->blocksize_1/2)*vc->audio_channels * sizeof(float));
- vc->channel_floors=(float *)av_malloc((vc->blocksize_1/2)*vc->audio_channels * sizeof(float));
- vc->saved=(float *)av_malloc((vc->blocksize_1/2)*vc->audio_channels * sizeof(float));
- vc->ret=(float *)av_malloc((vc->blocksize_1/2)*vc->audio_channels * sizeof(float));
- vc->buf=(float *)av_malloc(vc->blocksize_1 * sizeof(float));
- vc->buf_tmp=(float *)av_malloc(vc->blocksize_1 * sizeof(float));
- vc->saved_start=0;
-
- ff_mdct_init(&vc->mdct0, bl0, 1);
- ff_mdct_init(&vc->mdct1, bl1, 1);
-
- AV_DEBUG(" 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 ",
- vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize_0, vc->blocksize_1);
-
-/*
- BLK=vc->blocksize_0;
- for(i=0;i<BLK/2;++i) {
- vc->swin[i]=sin(0.5*3.14159265358*(sin(((float)i+0.5)/(float)BLK*3.14159265358))*(sin(((float)i+0.5)/(float)BLK*3.14159265358)));
- }
-*/
-
- return 0;
-}
-
-// Process the extradata using the functions above (identification header, setup header)
-
-static int vorbis_decode_init(AVCodecContext *avccontext) {
- vorbis_context *vc = avccontext->priv_data ;
- uint8_t *headers = avccontext->extradata;
- int headers_len=avccontext->extradata_size;
- uint8_t *header_start[3];
- int header_len[3];
- GetBitContext *gb = &(vc->gb);
- int i, j, hdr_type;
-
- vc->avccontext = avccontext;
-
- if (!headers_len) {
- av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
- return -1;
- }
-
- if(headers[0] == 0 && headers[1] == 30) {
- for(i = 0; i < 3; i++){
- header_len[i] = *headers++ << 8;
- header_len[i] += *headers++;
- header_start[i] = headers;
- headers += header_len[i];
- }
- } else if(headers[0] == 2) {
- for(j=1,i=0;i<2;++i, ++j) {
- header_len[i]=0;
- while(j<headers_len && headers[j]==0xff) {
- header_len[i]+=0xff;
- ++j;
- }
- if (j>=headers_len) {
- av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
- return -1;
- }
- header_len[i]+=headers[j];
- }
- header_len[2]=headers_len-header_len[0]-header_len[1]-j;
- headers+=j;
- header_start[0] = headers;
- header_start[1] = header_start[0] + header_len[0];
- header_start[2] = header_start[1] + header_len[1];
- } else {
- av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
- return -1;
- }
-
- init_get_bits(gb, header_start[0], header_len[0]*8);
- hdr_type=get_bits(gb, 8);
- if (hdr_type!=1) {
- av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
- return -1;
- }
- if (vorbis_parse_id_hdr(vc)) {
- av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
- vorbis_free(vc);
- return -1;
- }
-
- init_get_bits(gb, header_start[2], header_len[2]*8);
- hdr_type=get_bits(gb, 8);
- if (hdr_type!=5) {
- av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
- return -1;
- }
- if (vorbis_parse_setup_hdr(vc)) {
- av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
- vorbis_free(vc);
- return -1;
- }
-
- avccontext->channels = vc->audio_channels;
- avccontext->sample_rate = vc->audio_samplerate;
-
- return 0 ;
-}
-
-// Decode audiopackets -------------------------------------------------
-
-// Read and decode floor (type 1 only)
-
-static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor *vf, float *vec) {
- GetBitContext *gb=&vc->gb;
- uint_fast16_t range_v[4]={ 256, 128, 86, 64 };
- uint_fast16_t range=range_v[vf->multiplier-1];
- uint_fast16_t floor1_Y[vf->x_list_dim];
- uint_fast16_t floor1_Y_final[vf->x_list_dim];
- uint_fast8_t floor1_flag[vf->x_list_dim];
- uint_fast8_t class_;
- uint_fast8_t cdim;
- uint_fast8_t cbits;
- uint_fast8_t csub;
- uint_fast8_t cval;
- int_fast16_t book;
- uint_fast16_t offset;
- uint_fast16_t i,j;
- uint_fast16_t *floor_x_sort=vf->x_list_order;
- /*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ?
- int_fast16_t dy, err;
- uint_fast16_t lx,hx, ly, hy=0;
-
-
- if (!get_bits1(gb)) return 1; // silence
-
-// Read values (or differences) for the floor's points
-
- floor1_Y[0]=get_bits(gb, ilog(range-1));
- floor1_Y[1]=get_bits(gb, ilog(range-1));
-
- AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
-
- offset=2;
- for(i=0;i<vf->partitions;++i) {
- class_=vf->partition_class[i];
- cdim=vf->class_dimensions[class_];
- cbits=vf->class_subclasses[class_];
- csub=(1<<cbits)-1;
- cval=0;
-
- AV_DEBUG("Cbits %d \n", cbits);
-
- if (cbits) { // this reads all subclasses for this partition's class
- cval=get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
- vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
- }
-
- for(j=0;j<cdim;++j) {
- book=vf->subclass_books[class_][cval & csub];
-
- AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb));
-
- cval=cval>>cbits;
- if (book>0) {
- floor1_Y[offset+j]=get_vlc2(gb, vc->codebooks[book].vlc.table,
- vc->codebooks[book].nb_bits, 3);
- } else {
- floor1_Y[offset+j]=0;
- }
-
- AV_DEBUG(" floor(%d) = %d \n", vf->x_list[offset+j], floor1_Y[offset+j]);
- }
- offset+=cdim;
- }
-
-// Amplitude calculation from the differences
-
- floor1_flag[0]=1;
- floor1_flag[1]=1;
- floor1_Y_final[0]=floor1_Y[0];
- floor1_Y_final[1]=floor1_Y[1];
-
- for(i=2;i<vf->x_list_dim;++i) {
- uint_fast16_t val, highroom, lowroom, room;
- uint_fast16_t high_neigh_offs;
- uint_fast16_t low_neigh_offs;
-
- low_neigh_offs=vf->low_neighbour[i];
- high_neigh_offs=vf->high_neighbour[i];
- dy=floor1_Y_final[high_neigh_offs]-floor1_Y_final[low_neigh_offs]; // render_point begin
- adx=vf->x_list[high_neigh_offs]-vf->x_list[low_neigh_offs];
- ady= ABS(dy);
- err=ady*(vf->x_list[i]-vf->x_list[low_neigh_offs]);
- off=err/adx;
- if (dy<0) {
- predicted=floor1_Y_final[low_neigh_offs]-off;
- } else {
- predicted=floor1_Y_final[low_neigh_offs]+off;
- } // render_point end
-
- val=floor1_Y[i];
- highroom=range-predicted;
- lowroom=predicted;
- if (highroom < lowroom) {
- room=highroom*2;
- } else {
- room=lowroom*2; // SPEC mispelling
- }
- if (val) {
- floor1_flag[low_neigh_offs]=1;
- floor1_flag[high_neigh_offs]=1;
- floor1_flag[i]=1;
- if (val>=room) {
- if (highroom > lowroom) {
- floor1_Y_final[i]=val-lowroom+predicted;
- } else {
- floor1_Y_final[i]=predicted-val+highroom-1;
- }
- } else {
- if (val & 1) {
- floor1_Y_final[i]=predicted-(val+1)/2;
- } else {
- floor1_Y_final[i]=predicted+val/2;
- }
- }
- } else {
- floor1_flag[i]=0;
- floor1_Y_final[i]=predicted;
- }
-
- AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->x_list[i], floor1_Y_final[i], val);
- }
-
-// Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
-
- hx=0;
- lx=0;
- ly=floor1_Y_final[0]*vf->multiplier; // conforms to SPEC
-
- vec[0]=floor1_inverse_db_table[ly];
-
- for(i=1;i<vf->x_list_dim;++i) {
- AV_DEBUG(" Looking at post %d \n", i);
-
- if (floor1_flag[floor_x_sort[i]]) { // SPEC mispelled
- int_fast16_t x, y, dy, base, sy; // if uncommented: dy = -32 adx = 2 base = 2blablabla ?????
-
- hy=floor1_Y_final[floor_x_sort[i]]*vf->multiplier;
- hx=vf->x_list[floor_x_sort[i]];
-
- dy=hy-ly;
- adx=hx-lx;
- ady= (dy<0) ? -dy:dy;//ABS(dy);
- base=dy/adx;
-
- AV_DEBUG(" dy %d adx %d base %d = %d \n", dy, adx, base, dy/adx);
-
- x=lx;
- y=ly;
- err=0;
- if (dy<0) {
- sy=base-1;
- } else {
- sy=base+1;
- }
- ady=ady-(base<0 ? -base : base)*adx;
- vec[x]=floor1_inverse_db_table[y];
-
- AV_DEBUG(" vec[ %d ] = %d \n", x, y);
-
- for(x=lx+1;(x<hx) && (x<vf->x_list[1]);++x) {
- err+=ady;
- if (err>=adx) {
- err-=adx;
- y+=sy;
- } else {
- y+=base;
- }
- vec[x]=floor1_inverse_db_table[y];
-
- AV_DEBUG(" vec[ %d ] = %d \n", x, y);
- }
-
-/* for(j=1;j<hx-lx+1;++j) { // iterating render_point
- dy=hy-ly;
- adx=hx-lx;
- ady= dy<0 ? -dy : dy;
- err=ady*j;
- off=err/adx;
- if (dy<0) {
- predicted=ly-off;
- } else {
- predicted=ly+off;
- }
- if (lx+j < vf->x_list[1]) {
- vec[lx+j]=floor1_inverse_db_table[predicted];
- }
- }*/
-
- lx=hx;
- ly=hy;
- }
- }
-
- if (hx<vf->x_list[1]) {
- for(i=hx;i<vf->x_list[1];++i) {
- vec[i]=floor1_inverse_db_table[hy];
- }
- }
-
- AV_DEBUG(" Floor decoded\n");
-
- return 0;
-}
-
-// Read and decode residue
-
-static int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr, uint_fast8_t ch, uint_fast8_t *do_not_decode, float *vec, uint_fast16_t vlen) {
- GetBitContext *gb=&vc->gb;
- uint_fast8_t c_p_c=vc->codebooks[vr->classbook].dimensions;
- uint_fast16_t n_to_read=vr->end-vr->begin;
- uint_fast16_t ptns_to_read=n_to_read/vr->partition_size;
- uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
- uint_fast8_t pass;
- uint_fast8_t ch_used;
- uint_fast8_t i,j,l;
- uint_fast16_t k;
-
- if (vr->type==2) {
- for(j=1;j<ch;++j) {
- do_not_decode[0]&=do_not_decode[j]; // FIXME - clobbering input
- }
- if (do_not_decode[0]) return 0;
- ch_used=1;
- } else {
- ch_used=ch;
- }
-
- AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
-
- for(pass=0;pass<=vr->maxpass;++pass) { // FIXME OPTIMIZE?
- uint_fast16_t voffset;
- uint_fast16_t partition_count;
- uint_fast16_t j_times_ptns_to_read;
-
- voffset=vr->begin;
- for(partition_count=0;partition_count<ptns_to_read;) { // SPEC error
- if (!pass) {
- for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
- if (!do_not_decode[j]) {
- uint_fast32_t temp=get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
- vc->codebooks[vr->classbook].nb_bits, 3);
-
- AV_DEBUG("Classword: %d \n", temp);
-
- assert(vr->classifications > 1 && vr->classifications<256 && temp<=65536); //needed for inverse[]
- for(i=0;i<c_p_c;++i) {
- uint_fast32_t temp2;
-
- temp2=(((uint_fast64_t)temp) * inverse[vr->classifications])>>32;
- classifs[j_times_ptns_to_read+partition_count+c_p_c-1-i]=temp-temp2*vr->classifications;
- temp=temp2;
- }
- }
- j_times_ptns_to_read+=ptns_to_read;
- }
- }
- for(i=0;(i<c_p_c) && (partition_count<ptns_to_read);++i) {
- for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
- uint_fast16_t voffs;
-
- if (!do_not_decode[j]) {
- uint_fast8_t vqclass=classifs[j_times_ptns_to_read+partition_count];
- int_fast16_t vqbook=vr->books[vqclass][pass];
-
- if (vqbook>=0) {
- uint_fast16_t coffs;
- uint_fast16_t step=vr->partition_size/vc->codebooks[vqbook].dimensions;
- vorbis_codebook codebook= vc->codebooks[vqbook];
-
- if (vr->type==0) {
-
- voffs=voffset+j*vlen;
- for(k=0;k<step;++k) {
- coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * codebook.dimensions;
- for(l=0;l<codebook.dimensions;++l) {
- vec[voffs+k+l*step]+=codebook.codevectors[coffs+l]; // FPMATH
- }
- }
- }
- else if (vr->type==1) {
- voffs=voffset+j*vlen;
- for(k=0;k<step;++k) {
- coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * codebook.dimensions;
- for(l=0;l<codebook.dimensions;++l, ++voffs) {
- vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
-
- AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
- }
- }
- }
- else if (vr->type==2 && ch==2 && (voffset&1)==0 && (codebook.dimensions&1)==0) { // most frequent case optimized
- voffs=voffset>>1;
-
- for(k=0;k<step;++k) {
- coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * codebook.dimensions;
- for(l=0;l<codebook.dimensions;l+=2, voffs++) {
- vec[voffs ]+=codebook.codevectors[coffs+l ]; // FPMATH
- vec[voffs+vlen]+=codebook.codevectors[coffs+l+1]; // FPMATH
-
- AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", pass, voffset/ch+(voffs%ch)*vlen, vec[voffset/ch+(voffs%ch)*vlen], codebook.codevectors[coffs+l], coffs, l);
- }
- }
-
- }
- else if (vr->type==2) {
- voffs=voffset;
-
- for(k=0;k<step;++k) {
- coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * codebook.dimensions;
- for(l=0;l<codebook.dimensions;++l, ++voffs) {
- vec[voffs/ch+(voffs%ch)*vlen]+=codebook.codevectors[coffs+l]; // FPMATH FIXME use if and counter instead of / and %
-
- AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", pass, voffset/ch+(voffs%ch)*vlen, vec[voffset/ch+(voffs%ch)*vlen], codebook.codevectors[coffs+l], coffs, l);
- }
- }
- } else {
- av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
- return 1;
- }
- }
- }
- j_times_ptns_to_read+=ptns_to_read;
- }
- ++partition_count;
- voffset+=vr->partition_size;
- }
- }
- }
- return 0;
-}
-
-// Decode the audio packet using the functions above
-#define BIAS 385
-
-static int vorbis_parse_audio_packet(vorbis_context *vc) {
- GetBitContext *gb=&vc->gb;
-
- uint_fast8_t previous_window=0,next_window=0;
- uint_fast8_t mode_number;
- uint_fast16_t blocksize;
- int_fast32_t i,j;
- uint_fast8_t no_residue[vc->audio_channels];
- uint_fast8_t do_not_decode[vc->audio_channels];
- vorbis_mapping *mapping;
- float *ch_res_ptr=vc->channel_residues;
- float *ch_floor_ptr=vc->channel_floors;
- uint_fast8_t res_chan[vc->audio_channels];
- uint_fast8_t res_num=0;
- int_fast16_t retlen=0;
- uint_fast16_t saved_start=0;
-
- if (get_bits1(gb)) {
- av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
- return -1; // packet type not audio
- }
-
- if (vc->mode_count==1) {
- mode_number=0;
- } else {
- mode_number=get_bits(gb, ilog(vc->mode_count-1));
- }
- mapping=&vc->mappings[vc->modes[mode_number].mapping];
-
- AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
-
- if (vc->modes[mode_number].blockflag) {
- previous_window=get_bits1(gb);
- next_window=get_bits1(gb);
- }
-
- blocksize=vc->modes[mode_number].blockflag ? vc->blocksize_1 : vc->blocksize_0;
- memset(ch_res_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
- memset(ch_floor_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
-
-// Decode floor(1)
-
- for(i=0;i<vc->audio_channels;++i) {
- vorbis_floor *floor;
- if (mapping->submaps>1) {
- floor=&vc->floors[mapping->submap_floor[mapping->mux[i]]];
- } else {
- floor=&vc->floors[mapping->submap_floor[0]];
- }
-
- no_residue[i]=vorbis_floor1_decode(vc, floor, ch_floor_ptr);
- ch_floor_ptr+=blocksize/2;
- }
-
-// Nonzero vector propagate
-
- for(i=mapping->coupling_steps-1;i>=0;--i) {
- if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
- no_residue[mapping->magnitude[i]]=0;
- no_residue[mapping->angle[i]]=0;
- }
- }
-
-// Decode residue
-
- for(i=0;i<mapping->submaps;++i) {
- vorbis_residue *residue;
- uint_fast8_t ch=0;
-
- for(j=0;j<vc->audio_channels;++j) {
- if ((mapping->submaps==1) || (i=mapping->mux[j])) {
- res_chan[j]=res_num;
- if (no_residue[j]) {
- do_not_decode[ch]=1;
- } else {
- do_not_decode[ch]=0;
- }
- ++ch;
- ++res_num;
- }
- }
- residue=&vc->residues[mapping->submap_residue[i]];
- vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
-
- ch_res_ptr+=ch*blocksize/2;
- }
-
-// Inverse coupling
-
- for(i=mapping->coupling_steps-1;i>=0;--i) { //warning: i has to be signed
- float *mag, *ang;
-
- mag=vc->channel_residues+res_chan[mapping->magnitude[i]]*blocksize/2;
- ang=vc->channel_residues+res_chan[mapping->angle[i]]*blocksize/2;
- for(j=0;j<blocksize/2;++j) {
- float temp;
- if (mag[j]>0.0) {
- if (ang[j]>0.0) {
- ang[j]=mag[j]-ang[j];
- } else {
- temp=ang[j];
- ang[j]=mag[j];
- mag[j]+=temp;
- }
- } else {
- if (ang[j]>0.0) {
- ang[j]+=mag[j];
- } else {
- temp=ang[j];
- ang[j]=mag[j];
- mag[j]-=temp;
- }
- }
- }
- }
-
-// Dotproduct
-
- for(j=0, ch_floor_ptr=vc->channel_floors;j<vc->audio_channels;++j,ch_floor_ptr+=blocksize/2) {
- ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2;
-
- for(i=0;i<blocksize/2;++i) {
- ch_floor_ptr[i]*=ch_res_ptr[i]; //FPMATH
- }
- }
-
-// MDCT, overlap/add, save data for next overlapping FPMATH
-
- for(j=0;j<vc->audio_channels;++j) {
- uint_fast8_t step=vc->audio_channels;
- uint_fast16_t k;
- float *saved=vc->saved+j*vc->blocksize_1/2;
- float *ret=vc->ret;
- const float *lwin=vc->lwin;
- const float *swin=vc->swin;
- float *buf=vc->buf;
- float *buf_tmp=vc->buf_tmp;
-
- ch_floor_ptr=vc->channel_floors+j*blocksize/2;
-
- saved_start=vc->saved_start;
-
- ff_imdct_calc(vc->modes[mode_number].blockflag ? &vc->mdct1 : &vc->mdct0, buf, ch_floor_ptr, buf_tmp);
-
- if (vc->modes[mode_number].blockflag) {
- // -- overlap/add
- if (previous_window) {
- for(k=j, i=0;i<vc->blocksize_1/2;++i, k+=step) {
- ret[k]=saved[i]+buf[i]*lwin[i]+BIAS;
- }
- retlen=vc->blocksize_1/2;
- } else {
- buf += (vc->blocksize_1-vc->blocksize_0)/4;
- for(k=j, i=0;i<vc->blocksize_0/2;++i, k+=step) {
- ret[k]=saved[i]+buf[i]*swin[i]+BIAS;
- }
- buf += vc->blocksize_0/2;
- for(i=0;i<(vc->blocksize_1-vc->blocksize_0)/4;++i, k+=step) {
- ret[k]=buf[i]+BIAS;
- }
- buf=vc->buf;
- retlen=vc->blocksize_0/2+(vc->blocksize_1-vc->blocksize_0)/4;
- }
- // -- save
- if (next_window) {
- buf += vc->blocksize_1/2;
- lwin += vc->blocksize_1/2-1;
- for(i=0;i<vc->blocksize_1/2;++i) {
- saved[i]=buf[i]*lwin[-i];
- }
- saved_start=0;
- } else {
- saved_start=(vc->blocksize_1-vc->blocksize_0)/4;
- buf += vc->blocksize_1/2;
- for(i=0;i<saved_start;++i) {
- saved[i]=buf[i];
- }
- swin += vc->blocksize_0/2-1;
- for(i=0;i<vc->blocksize_0/2;++i) {
- saved[saved_start+i]=buf[saved_start+i]*swin[-i];
- }
- }
- } else {
- // --overlap/add
- for(k=j, i=0;i<saved_start;++i, k+=step) {
- ret[k]=saved[i]+BIAS;
- }
- for(i=0;i<vc->blocksize_0/2;++i, k+=step) {
- ret[k]=saved[saved_start+i]+buf[i]*swin[i]+BIAS;
- }
- retlen=saved_start+vc->blocksize_0/2;
- // -- save
- buf += vc->blocksize_0/2;
- swin += vc->blocksize_0/2-1;
- for(i=0;i<vc->blocksize_0/2;++i) {
- saved[i]=buf[i]*swin[-i];
- }
- saved_start=0;
- }
- }
- vc->saved_start=saved_start;
-
- return retlen*vc->audio_channels;
-}
-
-// Return the decoded audio packet through the standard api
-
-static int vorbis_decode_frame(AVCodecContext *avccontext,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
-{
- vorbis_context *vc = avccontext->priv_data ;
- GetBitContext *gb = &(vc->gb);
-
- int_fast16_t i, len;
-
- if(!buf_size){
- return 0;
- }
-
- AV_DEBUG("packet length %d \n", buf_size);
-
- init_get_bits(gb, buf, buf_size*8);
-
- len=vorbis_parse_audio_packet(vc);
-
- if (len<=0) {
- *data_size=0;
- return buf_size;
- }
-
- if (!vc->first_frame) {
- vc->first_frame=1;
- *data_size=0;
- return buf_size ;
- }
-
- AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
-
- for(i=0;i<len;++i) {
- int_fast32_t tmp= ((int32_t*)vc->ret)[i];
- if(tmp & 0xf0000){
-// tmp= (0x43c0ffff - tmp)>>31; //ask gcc devs why this is slower
- if(tmp > 0x43c0ffff) tmp= 0xFFFF;
- else tmp= 0;
- }
- ((int16_t*)data)[i]=tmp - 0x8000;
- }
-
- *data_size=len*2;
-
- return buf_size ;
-}
-
-// Close decoder
-
-static int vorbis_decode_close(AVCodecContext *avccontext) {
- vorbis_context *vc = avccontext->priv_data;
-
- vorbis_free(vc);
-
- return 0 ;
-}
-
-AVCodec vorbis_decoder = {
- "vorbis",
- CODEC_TYPE_AUDIO,
- CODEC_ID_VORBIS,
- sizeof(vorbis_context),
- vorbis_decode_init,
- NULL,
- vorbis_decode_close,
- vorbis_decode_frame,
-};
-