From 07c55d8ea3f952cab2e53db374d28be5e85339ed Mon Sep 17 00:00:00 2001 From: Aurelien Jacobs Date: Thu, 10 May 2007 15:24:01 +0000 Subject: [PATCH] rename vorbis.c to vorbis_dec.c and vorbis_common.c to vorbis.c Originally committed as revision 8981 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/Makefile | 4 +- libavcodec/vorbis.c | 1676 +++----------------------------------------- libavcodec/vorbis_common.c | 186 ----- libavcodec/vorbis_dec.c | 1638 +++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 1752 insertions(+), 1752 deletions(-) delete mode 100644 libavcodec/vorbis_common.c create mode 100644 libavcodec/vorbis_dec.c diff --git a/libavcodec/Makefile b/libavcodec/Makefile index 4feef82..5b56dae 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -170,8 +170,8 @@ OBJS-$(CONFIG_VCR1_ENCODER) += vcr1.o OBJS-$(CONFIG_VMDAUDIO_DECODER) += vmdav.o OBJS-$(CONFIG_VMDVIDEO_DECODER) += vmdav.o OBJS-$(CONFIG_VMNC_DECODER) += vmnc.o -OBJS-$(CONFIG_VORBIS_DECODER) += vorbis.o vorbis_common.o vorbis_data.o xiph.o -OBJS-$(CONFIG_VORBIS_ENCODER) += vorbis_enc.o vorbis_common.o vorbis_data.o +OBJS-$(CONFIG_VORBIS_DECODER) += vorbis_dec.o vorbis.o vorbis_data.o xiph.o +OBJS-$(CONFIG_VORBIS_ENCODER) += vorbis_enc.o vorbis.o vorbis_data.o OBJS-$(CONFIG_VP3_DECODER) += vp3.o OBJS-$(CONFIG_VP5_DECODER) += vp5.o vp56.o vp56data.o OBJS-$(CONFIG_VP6_DECODER) += vp6.o vp56.o vp56data.o diff --git a/libavcodec/vorbis.c b/libavcodec/vorbis.c index 8623438..f80c62b 100644 --- a/libavcodec/vorbis.c +++ b/libavcodec/vorbis.c @@ -1,6 +1,6 @@ /** * @file vorbis.c - * Vorbis I decoder + * Common code for Vorbis I encoder and decoder * @author Denes Balatoni ( dbalatoni programozo hu ) * This file is part of FFmpeg. @@ -23,1616 +23,164 @@ #undef V_DEBUG //#define V_DEBUG -//#define AV_DEBUG(...) av_log(NULL, AV_LOG_INFO, __VA_ARGS__) - -#include #define ALT_BITSTREAM_READER_LE #include "avcodec.h" #include "bitstream.h" -#include "dsputil.h" #include "vorbis.h" -#include "xiph.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 - -typedef struct { - uint_fast8_t dimensions; - uint_fast8_t lookup_type; - uint_fast8_t maxdepth; - VLC vlc; - float *codevectors; - unsigned int nb_bits; -} vorbis_codebook; - -typedef union vorbis_floor_u vorbis_floor_data; -typedef struct vorbis_floor0_s vorbis_floor0; -typedef struct vorbis_floor1_s vorbis_floor1; -struct vorbis_context_s; -typedef -uint_fast8_t (* vorbis_floor_decode_func) - (struct vorbis_context_s *, vorbis_floor_data *, float *); -typedef struct { - uint_fast8_t floor_type; - vorbis_floor_decode_func decode; - union vorbis_floor_u - { - struct vorbis_floor0_s - { - uint_fast8_t order; - uint_fast16_t rate; - uint_fast16_t bark_map_size; - int_fast32_t * map[2]; - uint_fast32_t map_size[2]; - uint_fast8_t amplitude_bits; - uint_fast8_t amplitude_offset; - uint_fast8_t num_books; - uint_fast8_t * book_list; - float * lsp; - } t0; - struct vorbis_floor1_s - { - uint_fast8_t partitions; - uint_fast8_t maximum_class; - uint_fast8_t partition_class[32]; - uint_fast8_t class_dimensions[16]; - uint_fast8_t class_subclasses[16]; - uint_fast8_t class_masterbook[16]; - int_fast16_t subclass_books[16][8]; - uint_fast8_t multiplier; - uint_fast16_t x_list_dim; - floor1_entry_t * list; - } t1; - } data; -} vorbis_floor; -typedef struct { - uint_fast16_t type; - uint_fast32_t begin; - uint_fast32_t end; - uint_fast32_t partition_size; - uint_fast8_t classifications; - uint_fast8_t classbook; - int_fast16_t books[64][8]; - uint_fast8_t maxpass; -} vorbis_residue; - -typedef struct { - uint_fast8_t submaps; - uint_fast16_t coupling_steps; - uint_fast8_t *magnitude; - uint_fast8_t *angle; - uint_fast8_t *mux; - uint_fast8_t submap_floor[16]; - uint_fast8_t submap_residue[16]; -} vorbis_mapping; - -typedef struct { - uint_fast8_t blockflag; - uint_fast16_t windowtype; - uint_fast16_t transformtype; - uint_fast8_t mapping; -} vorbis_mode; - -typedef struct vorbis_context_s { - AVCodecContext *avccontext; - GetBitContext gb; - DSPContext dsp; - - MDCTContext mdct[2]; - uint_fast8_t first_frame; - uint_fast32_t version; - uint_fast8_t audio_channels; - uint_fast32_t audio_samplerate; - uint_fast32_t bitrate_maximum; - uint_fast32_t bitrate_nominal; - uint_fast32_t bitrate_minimum; - uint_fast32_t blocksize[2]; - const float * win[2]; - uint_fast16_t codebook_count; - vorbis_codebook *codebooks; - uint_fast8_t floor_count; - vorbis_floor *floors; - uint_fast8_t residue_count; - vorbis_residue *residues; - uint_fast8_t mapping_count; - vorbis_mapping *mappings; - uint_fast8_t mode_count; - vorbis_mode *modes; - uint_fast8_t mode_number; // mode number for the current packet - float *channel_residues; - float *channel_floors; - float *saved; - uint_fast16_t saved_start; - float *ret; - float *buf; - float *buf_tmp; - uint_fast32_t add_bias; // for float->int conversion - uint_fast32_t exp_bias; -} vorbis_context; /* Helper functions */ -#define BARK(x) \ - (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x)) - -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)); -} +unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n) { // x^(1/n) + unsigned int ret=0, i, j; + do { + ++ret; + for(i=0,j=ret;ichannel_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->mdct[0]); - ff_mdct_end(&vc->mdct[1]); - - for(i=0;icodebook_count;++i) { - av_free(vc->codebooks[i].codevectors); - free_vlc(&vc->codebooks[i].vlc); - } - av_freep(&vc->codebooks); - - for(i=0;ifloor_count;++i) { - if(vc->floors[i].floor_type==0) { - av_free(vc->floors[i].data.t0.map[0]); - av_free(vc->floors[i].data.t0.map[1]); - av_free(vc->floors[i].data.t0.book_list); - av_free(vc->floors[i].data.t0.lsp); - } - else { - av_free(vc->floors[i].data.t1.list); - } - } - av_freep(&vc->floors); - - for(i=0;imapping_count;++i) { - av_free(vc->mappings[i].magnitude); - av_free(vc->mappings[i].angle); - av_free(vc->mappings[i].mux); - } - av_freep(&vc->mappings); - - if(vc->exp_bias){ - av_freep(&vc->win[0]); - av_freep(&vc->win[1]); - } + return (ret-1); } -// Parse setup header ------------------------------------------------- - -// Process codebooks part - -static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) { - uint_fast16_t cb; - uint8_t *tmp_vlc_bits; - uint32_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=(uint8_t *)av_mallocz(V_MAX_VLCS * sizeof(uint8_t)); - tmp_vlc_codes=(uint32_t *)av_mallocz(V_MAX_VLCS * sizeof(uint32_t)); - - for(cb=0;cbcodebook_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, " %"PRIdFAST16". 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, " %"PRIdFAST16". 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, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \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;ceused_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=ff_vorbis_nth_root(entries, codebook_setup->dimensions); - uint_fast16_t codebook_multiplicands[codebook_lookup_values]; - - float codebook_minimum_value=vorbisfloat2float(get_bits_long(gb, 32)); - float codebook_delta_value=vorbisfloat2float(get_bits_long(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;icodevectors=(float *)av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float)); - for(j=0, i=0;idimensions; - - if (tmp_vlc_bits[i]) { - float last=0.0; - uint_fast32_t lookup_offset=i; + uint_fast8_t i,j; + uint_fast32_t code,p; #ifdef V_DEBUG - av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i); -#endif - - for(k=0;kcodevectors[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;kavccontext, 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 (ff_vorbis_len2vlc(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=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; - } - } - - 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;iavccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n"); - return 1; - } - } - return 0; -} - -// Process floors part - -static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc, - vorbis_floor_data *vfu, float *vec); -static void create_map( vorbis_context * vc, uint_fast8_t floor_number ); -static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, - vorbis_floor_data *vfu, float *vec); -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;ifloor_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->decode=vorbis_floor1_decode; - - floor_setup->data.t1.partitions=get_bits(gb, 5); - - AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions); - - for(j=0;jdata.t1.partitions;++j) { - floor_setup->data.t1.partition_class[j]=get_bits(gb, 4); - if (floor_setup->data.t1.partition_class[j]>maximum_class) maximum_class=floor_setup->data.t1.partition_class[j]; - - AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]); - - } - - AV_DEBUG(" maximum class %d \n", maximum_class); - - floor_setup->data.t1.maximum_class=maximum_class; - - for(j=0;j<=maximum_class;++j) { - floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1; - floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2); - - AV_DEBUG(" %d floor %d class dim: %d subclasses %d \n", i, j, floor_setup->data.t1.class_dimensions[j], floor_setup->data.t1.class_subclasses[j]); - - if (floor_setup->data.t1.class_subclasses[j]) { - floor_setup->data.t1.class_masterbook[j]=get_bits(gb, 8); - - AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]); - } - - for(k=0;k<(1<data.t1.class_subclasses[j]);++k) { - floor_setup->data.t1.subclass_books[j][k]=(int16_t)get_bits(gb, 8)-1; - - AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]); - } - } - - floor_setup->data.t1.multiplier=get_bits(gb, 2)+1; - floor_setup->data.t1.x_list_dim=2; - - for(j=0;jdata.t1.partitions;++j) { - floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; - } - - floor_setup->data.t1.list=(floor1_entry_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(floor1_entry_t)); - - - rangebits=get_bits(gb, 4); - floor_setup->data.t1.list[0].x = 0; - floor_setup->data.t1.list[1].x = (1<data.t1.partitions;++j) { - for(k=0;kdata.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];++k,++floor1_values) { - floor_setup->data.t1.list[floor1_values].x=get_bits(gb, rangebits); - - AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.list[floor1_values].x); - } - } - -// Precalculate order of x coordinates - needed for decode - ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim); - } - else if(floor_setup->floor_type==0) { - uint_fast8_t max_codebook_dim=0; - - floor_setup->decode=vorbis_floor0_decode; - - floor_setup->data.t0.order=get_bits(gb, 8); - floor_setup->data.t0.rate=get_bits(gb, 16); - floor_setup->data.t0.bark_map_size=get_bits(gb, 16); - floor_setup->data.t0.amplitude_bits=get_bits(gb, 6); - /* zero would result in a div by zero later * - * 2^0 - 1 == 0 */ - if (floor_setup->data.t0.amplitude_bits == 0) { - av_log(vc->avccontext, AV_LOG_ERROR, - "Floor 0 amplitude bits is 0.\n"); - return 1; - } - floor_setup->data.t0.amplitude_offset=get_bits(gb, 8); - floor_setup->data.t0.num_books=get_bits(gb, 4)+1; - - /* allocate mem for booklist */ - floor_setup->data.t0.book_list= - av_malloc(floor_setup->data.t0.num_books); - if(!floor_setup->data.t0.book_list) { return 1; } - /* read book indexes */ - { - int idx; - uint_fast8_t book_idx; - for (idx=0;idxdata.t0.num_books;++idx) { - book_idx=get_bits(gb, 8); - floor_setup->data.t0.book_list[idx]=book_idx; - if (vc->codebooks[book_idx].dimensions > max_codebook_dim) - max_codebook_dim=vc->codebooks[book_idx].dimensions; - - if (floor_setup->data.t0.book_list[idx]>vc->codebook_count) - return 1; - } - } - - create_map( vc, i ); - - /* allocate mem for lsp coefficients */ - { - /* codebook dim is for padding if codebook dim doesn't * - * divide order+1 then we need to read more data */ - floor_setup->data.t0.lsp= - av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim) - * sizeof(float)); - if(!floor_setup->data.t0.lsp) { return 1; } - } - -#ifdef V_DEBUG /* debug output parsed headers */ - AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order); - AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate); - AV_DEBUG("floor0 bark map size: %u\n", - floor_setup->data.t0.bark_map_size); - AV_DEBUG("floor0 amplitude bits: %u\n", - floor_setup->data.t0.amplitude_bits); - AV_DEBUG("floor0 amplitude offset: %u\n", - floor_setup->data.t0.amplitude_offset); - AV_DEBUG("floor0 number of books: %u\n", - floor_setup->data.t0.num_books); - AV_DEBUG("floor0 book list pointer: %p\n", - floor_setup->data.t0.book_list); - { - int idx; - for (idx=0;idxdata.t0.num_books;++idx) { - AV_DEBUG( " Book %d: %u\n", - idx+1, - floor_setup->data.t0.book_list[idx] ); - } - } + GetBitContext gb; #endif - } - else { - av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\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;iresidue_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;jclassifications;++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;jclassifications;++j) { - for(k=0;k<8;++k) { - if (cascade[j]&(1<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;imapping_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;jcoupling_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;jaudio_channels;++j) { - mapping_setup->mux[j]=get_bits(gb, 4); - } - } - - for(j=0;jsubmaps;++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 void create_map( vorbis_context * vc, uint_fast8_t floor_number ) -{ - vorbis_floor * floors=vc->floors; - vorbis_floor0 * vf; - int idx; - int_fast8_t blockflag; - int_fast32_t * map; - int_fast32_t n; //TODO: could theoretically be smaller? - - for (blockflag=0;blockflag<2;++blockflag) - { - n=vc->blocksize[blockflag]/2; - floors[floor_number].data.t0.map[blockflag]= - av_malloc((n+1) * sizeof(int_fast32_t)); // n+sentinel - - map=floors[floor_number].data.t0.map[blockflag]; - vf=&floors[floor_number].data.t0; - - for (idx=0; idxrate*idx)/(2.0f*n)) * - ((vf->bark_map_size)/ - BARK(vf->rate/2.0f )) ); - if (vf->bark_map_size-1 < map[idx]) { - map[idx]=vf->bark_map_size-1; - } - } - map[n]=-1; - vf->map_size[blockflag]=n; - } - -# ifdef V_DEBUG - for(idx=0;idx<=n;++idx) { - AV_DEBUG("floor0 map: map at pos %d is %d\n", - idx, map[idx]); - } -# endif -} - -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;imode_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; + for(p=0;(bits[p]==0) && (pavccontext, AV_LOG_INFO, "An empty codebook. Heh?! \n"); + return 0; } - 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 + codes[p]=0; + for(i=0;igb; - uint_fast8_t bl0, bl1; - - 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; +#ifdef V_DEBUG + 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;iversion=get_bits_long(gb, 32); //FIXME check 0 - vc->audio_channels=get_bits(gb, 8); //FIXME check >0 - vc->audio_samplerate=get_bits_long(gb, 32); //FIXME check >0 - vc->bitrate_maximum=get_bits_long(gb, 32); - vc->bitrate_nominal=get_bits_long(gb, 32); - vc->bitrate_minimum=get_bits_long(gb, 32); - bl0=get_bits(gb, 4); - bl1=get_bits(gb, 4); - vc->blocksize[0]=(1<blocksize[1]=(1<13 || bl0<6 || bl1>13 || bl1<6 || bl1avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n"); - return 3; - } - // output format int16 - if (vc->blocksize[1]/2 * vc->audio_channels * 2 > - AVCODEC_MAX_AUDIO_FRAME_SIZE) { - av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes " - "output packets too large.\n"); - return 4; - } - vc->win[0]=ff_vorbis_vwin[bl0-6]; - vc->win[1]=ff_vorbis_vwin[bl1-6]; + ++p; - if(vc->exp_bias){ - int i, j; - for(j=0; j<2; j++){ - float *win = av_malloc(vc->blocksize[j]/2 * sizeof(float)); - for(i=0; iblocksize[j]/2; i++) - win[i] = vc->win[j][i] * (1<<15); - vc->win[j] = win; + for(;p0;--i) { + if (exit_at_level[i]) break; } - } - - 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->mdct[0], bl0, 1); - ff_mdct_init(&vc->mdct[1], 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;iwin[0][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 hdr_type; - - vc->avccontext = avccontext; - dsputil_init(&vc->dsp, avccontext); - - if(vc->dsp.float_to_int16 == ff_float_to_int16_c) { - vc->add_bias = 385; - vc->exp_bias = 0; - } else { - vc->add_bias = 0; - vc->exp_bias = 15<<23; - } - - if (!headers_len) { - av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n"); - return -1; - } - - if (ff_split_xiph_headers(headers, headers_len, 30, header_start, header_len) < 0) { - 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 - -static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc, - vorbis_floor_data *vfu, float *vec) { - vorbis_floor0 * vf=&vfu->t0; - float * lsp=vf->lsp; - uint_fast32_t amplitude; - uint_fast32_t book_idx; - uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag; - - amplitude=get_bits(&vc->gb, vf->amplitude_bits); - if (amplitude>0) { - float last = 0; - uint_fast16_t lsp_len = 0; - uint_fast16_t idx; - vorbis_codebook codebook; - - book_idx=get_bits(&vc->gb, ilog(vf->num_books)); - if ( book_idx >= vf->num_books ) { - av_log( vc->avccontext, AV_LOG_ERROR, - "floor0 dec: booknumber too high!\n" ); - //FIXME: look above + if (!i) return 1; // overspecified tree + code=exit_at_level[i]; + exit_at_level[i]=0; + // construct code (append 0s to end) and introduce new exits + for(j=i+1;j<=bits[p];++j) { + exit_at_level[j]=code+(1<<(j-1)); } - AV_DEBUG( "floor0 dec: booknumber: %u\n", book_idx ); - codebook=vc->codebooks[vf->book_list[book_idx]]; - - while (lsp_lenorder) { - int vec_off; - - AV_DEBUG( "floor0 dec: book dimension: %d\n", codebook.dimensions ); - AV_DEBUG( "floor0 dec: maximum depth: %d\n", codebook.maxdepth ); - /* read temp vector */ - vec_off=get_vlc2(&vc->gb, - codebook.vlc.table, - codebook.nb_bits, - codebook.maxdepth ) * - codebook.dimensions; - AV_DEBUG( "floor0 dec: vector offset: %d\n", vec_off ); - /* copy each vector component and add last to it */ - for (idx=0; idxorder; - float wstep=M_PI/vf->bark_map_size; - - for(i=0;imap_size, order, wstep); - - i=0; - while(imap_size[blockflag]) { - int j, iter_cond=vf->map[blockflag][i]; - float p=0.5f; - float q=0.5f; - float two_cos_w=2.0f*cos(wstep*iter_cond); // needed all times - - /* similar part for the q and p products */ - for(j=0;jamplitude_offset)/ - (((1<amplitude_bits)-1) * sqrt(p+q)) ) - - vf->amplitude_offset ) * .11512925f - ); - } - - /* fill vector */ - do { vec[i]=q; ++i; }while(vf->map[blockflag][i]==iter_cond); - } - } - } - else { - /* this channel is unused */ - return 1; } - AV_DEBUG(" Floor0 decoded\n"); + //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; } -static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec) { - vorbis_floor1 * vf=&vfu->t1; - 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]; - int 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; - /*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ? - int_fast16_t dy, err; - - - 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;ipartitions;++i) { - class_=vf->partition_class[i]; - cdim=vf->class_dimensions[class_]; - cbits=vf->class_subclasses[class_]; - csub=(1<codebooks[vf->class_masterbook[class_]].vlc.table, - vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3); - } - - for(j=0;jsubclass_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>-1) { - 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->list[offset+j].x, 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;ix_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->list[i].low; - high_neigh_offs=vf->list[i].high; - dy=floor1_Y_final[high_neigh_offs]-floor1_Y_final[low_neigh_offs]; // render_point begin - adx=vf->list[high_neigh_offs].x-vf->list[low_neigh_offs].x; - ady= FFABS(dy); - err=ady*(vf->list[i].x-vf->list[low_neigh_offs].x); - off=(int16_t)err/(int16_t)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->list[i].x, floor1_Y_final[i], val); - } - -// Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ? - - ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x); - - 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;jmaxpass;++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_countclassifications]; - for(j_times_ptns_to_read=0, j=0;jcodebooks[vr->classbook].vlc.table, - vc->codebooks[vr->classbook].nb_bits, 3); - - AV_DEBUG("Classword: %d \n", temp); - - assert(vr->classifications > 1 && temp<=65536); //needed for inverse[] - for(i=0;i>32; - if (partition_count+c_p_c-1-i < ptns_to_read) { - 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;(ibooks[vqclass][pass]; - - if (vqbook>=0) { - uint_fast16_t coffs; - unsigned dim= vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64 - uint_fast16_t step= dim==1 ? vr->partition_size - : FASTDIV(vr->partition_size, dim); - vorbis_codebook codebook= vc->codebooks[vqbook]; - - if (vr->type==0) { - - voffs=voffset+j*vlen; - for(k=0;ktype==1) { - voffs=voffset+j*vlen; - for(k=0;ktype==2 && ch==2 && (voffset&1)==0 && (dim&1)==0) { // most frequent case optimized - voffs=voffset>>1; - - if(dim==2) { - for(k=0;ktype==2) { - voffs=voffset; - - for(k=0;kavccontext, 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; -} - -void vorbis_inverse_coupling(float *mag, float *ang, int blocksize) -{ +void ff_vorbis_ready_floor1_list(floor1_entry_t * list, int values) { int i; - for(i=0; i0.0) { - if (ang[i]>0.0) { - ang[i]=mag[i]-ang[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 { - float temp=ang[i]; - ang[i]=mag[i]; - mag[i]+=temp; - } + 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 { - if (ang[i]>0.0) { - ang[i]+=mag[i]; - } else { - float temp=ang[i]; - ang[i]=mag[i]; - mag[i]-=temp; - } + y += base; } + buf[x] = ff_vorbis_floor1_inverse_db_table[y]; } } -// Decode the audio packet using the functions above - -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; - float fadd_bias = vc->add_bias; - - 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)); - } - vc->mode_number=mode_number; - 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->blocksize[vc->modes[mode_number].blockflag]; - 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 - - for(i=0;iaudio_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]]; +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; } - - no_residue[i]=floor->decode(vc, &floor->data, ch_floor_ptr); - ch_floor_ptr+=blocksize/2; + if (lx >= samples) break; } - -// 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;isubmaps;++i) { - vorbis_residue *residue; - uint_fast8_t ch=0; - - for(j=0;jaudio_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; - vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2); - } - -// Dotproduct - - for(j=0, ch_floor_ptr=vc->channel_floors;jaudio_channels;++j,ch_floor_ptr+=blocksize/2) { - ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2; - vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2); - } - -// MDCT, overlap/add, save data for next overlapping FPMATH - - for(j=0;jaudio_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->win[1]; - const float *swin=vc->win[0]; - float *buf=vc->buf; - float *buf_tmp=vc->buf_tmp; - - ch_floor_ptr=vc->channel_floors+j*blocksize/2; - - saved_start=vc->saved_start; - - vc->mdct[0].fft.imdct_calc(&vc->mdct[vc->modes[mode_number].blockflag], buf, ch_floor_ptr, buf_tmp); - - //FIXME process channels together, to allow faster simd vector_fmul_add_add? - if (vc->modes[mode_number].blockflag) { - // -- overlap/add - if (previous_window) { - vc->dsp.vector_fmul_add_add(ret+j, buf, lwin, saved, vc->add_bias, vc->blocksize[1]/2, step); - retlen=vc->blocksize[1]/2; - } else { - int len = (vc->blocksize[1]-vc->blocksize[0])/4; - buf += len; - vc->dsp.vector_fmul_add_add(ret+j, buf, swin, saved, vc->add_bias, vc->blocksize[0]/2, step); - k = vc->blocksize[0]/2*step + j; - buf += vc->blocksize[0]/2; - if(vc->exp_bias){ - for(i=0; iexp_bias; // ret[k]=buf[i]*(1<buf; - retlen=vc->blocksize[0]/2+len; - } - // -- save - if (next_window) { - buf += vc->blocksize[1]/2; - vc->dsp.vector_fmul_reverse(saved, buf, lwin, vc->blocksize[1]/2); - saved_start=0; - } else { - saved_start=(vc->blocksize[1]-vc->blocksize[0])/4; - buf += vc->blocksize[1]/2; - for(i=0; iexp_bias; - vc->dsp.vector_fmul_reverse(saved+saved_start, buf+saved_start, swin, vc->blocksize[0]/2); - } - } else { - // --overlap/add - if(vc->add_bias) { - for(k=j, i=0;idsp.vector_fmul_add_add(ret+k, buf, swin, saved+saved_start, vc->add_bias, vc->blocksize[0]/2, step); - retlen=saved_start+vc->blocksize[0]/2; - // -- save - buf += vc->blocksize[0]/2; - vc->dsp.vector_fmul_reverse(saved, buf, swin, vc->blocksize[0]/2); - 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 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); - - vc->dsp.float_to_int16(data, vc->ret, len); - *data_size=len*2; - - return buf_size ; + if (lx < samples) render_line(lx, ly, samples, ly, out, samples); } - -// 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, -}; - diff --git a/libavcodec/vorbis_common.c b/libavcodec/vorbis_common.c deleted file mode 100644 index 5b398d8..0000000 --- a/libavcodec/vorbis_common.c +++ /dev/null @@ -1,186 +0,0 @@ -/** - * @file vorbis_common.c - * Common code for Vorbis I encoder and decoder - * @author Denes Balatoni ( dbalatoni programozo hu ) - - * 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 - * - */ - -#undef V_DEBUG -//#define V_DEBUG - -#define ALT_BITSTREAM_READER_LE -#include "avcodec.h" -#include "bitstream.h" - -#include "vorbis.h" - - -/* Helper functions */ - -unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n) { // x^(1/n) - unsigned int ret=0, i, j; - - do { - ++ret; - for(i=0,j=ret;iavccontext, AV_LOG_INFO, "An empty codebook. Heh?! \n"); - return 0; - } - - codes[p]=0; - for(i=0;i0;--i) { - if (exit_at_level[i]) break; - } - if (!i) return 1; // overspecified tree - code=exit_at_level[i]; - exit_at_level[i]=0; - // construct code (append 0s to end) and introduce new exits - for(j=i+1;j<=bits[p];++j) { - exit_at_level[j]=code+(1<<(j-1)); - } - codes[p]=code; - -#ifdef V_DEBUG - 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 list[list[i].low].x) list[i].low = j; - } else { - 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 { - y += base; - } - buf[x] = ff_vorbis_floor1_inverse_db_table[y]; - } -} - -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; - } - if (lx < samples) render_line(lx, ly, samples, ly, out, samples); -} diff --git a/libavcodec/vorbis_dec.c b/libavcodec/vorbis_dec.c new file mode 100644 index 0000000..e82833d --- /dev/null +++ b/libavcodec/vorbis_dec.c @@ -0,0 +1,1638 @@ +/** + * @file vorbis_dec.c + * Vorbis I decoder + * @author Denes Balatoni ( dbalatoni programozo hu ) + + * 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 + * + */ + +#undef V_DEBUG +//#define V_DEBUG +//#define AV_DEBUG(...) av_log(NULL, AV_LOG_INFO, __VA_ARGS__) + +#include + +#define ALT_BITSTREAM_READER_LE +#include "avcodec.h" +#include "bitstream.h" +#include "dsputil.h" + +#include "vorbis.h" +#include "xiph.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 + +typedef struct { + uint_fast8_t dimensions; + uint_fast8_t lookup_type; + uint_fast8_t maxdepth; + VLC vlc; + float *codevectors; + unsigned int nb_bits; +} vorbis_codebook; + +typedef union vorbis_floor_u vorbis_floor_data; +typedef struct vorbis_floor0_s vorbis_floor0; +typedef struct vorbis_floor1_s vorbis_floor1; +struct vorbis_context_s; +typedef +uint_fast8_t (* vorbis_floor_decode_func) + (struct vorbis_context_s *, vorbis_floor_data *, float *); +typedef struct { + uint_fast8_t floor_type; + vorbis_floor_decode_func decode; + union vorbis_floor_u + { + struct vorbis_floor0_s + { + uint_fast8_t order; + uint_fast16_t rate; + uint_fast16_t bark_map_size; + int_fast32_t * map[2]; + uint_fast32_t map_size[2]; + uint_fast8_t amplitude_bits; + uint_fast8_t amplitude_offset; + uint_fast8_t num_books; + uint_fast8_t * book_list; + float * lsp; + } t0; + struct vorbis_floor1_s + { + uint_fast8_t partitions; + uint_fast8_t maximum_class; + uint_fast8_t partition_class[32]; + uint_fast8_t class_dimensions[16]; + uint_fast8_t class_subclasses[16]; + uint_fast8_t class_masterbook[16]; + int_fast16_t subclass_books[16][8]; + uint_fast8_t multiplier; + uint_fast16_t x_list_dim; + floor1_entry_t * list; + } t1; + } data; +} vorbis_floor; + +typedef struct { + uint_fast16_t type; + uint_fast32_t begin; + uint_fast32_t end; + uint_fast32_t partition_size; + uint_fast8_t classifications; + uint_fast8_t classbook; + int_fast16_t books[64][8]; + uint_fast8_t maxpass; +} vorbis_residue; + +typedef struct { + uint_fast8_t submaps; + uint_fast16_t coupling_steps; + uint_fast8_t *magnitude; + uint_fast8_t *angle; + uint_fast8_t *mux; + uint_fast8_t submap_floor[16]; + uint_fast8_t submap_residue[16]; +} vorbis_mapping; + +typedef struct { + uint_fast8_t blockflag; + uint_fast16_t windowtype; + uint_fast16_t transformtype; + uint_fast8_t mapping; +} vorbis_mode; + +typedef struct vorbis_context_s { + AVCodecContext *avccontext; + GetBitContext gb; + DSPContext dsp; + + MDCTContext mdct[2]; + uint_fast8_t first_frame; + uint_fast32_t version; + uint_fast8_t audio_channels; + uint_fast32_t audio_samplerate; + uint_fast32_t bitrate_maximum; + uint_fast32_t bitrate_nominal; + uint_fast32_t bitrate_minimum; + uint_fast32_t blocksize[2]; + const float * win[2]; + uint_fast16_t codebook_count; + vorbis_codebook *codebooks; + uint_fast8_t floor_count; + vorbis_floor *floors; + uint_fast8_t residue_count; + vorbis_residue *residues; + uint_fast8_t mapping_count; + vorbis_mapping *mappings; + uint_fast8_t mode_count; + vorbis_mode *modes; + uint_fast8_t mode_number; // mode number for the current packet + float *channel_residues; + float *channel_floors; + float *saved; + uint_fast16_t saved_start; + float *ret; + float *buf; + float *buf_tmp; + uint_fast32_t add_bias; // for float->int conversion + uint_fast32_t exp_bias; +} vorbis_context; + +/* Helper functions */ + +#define BARK(x) \ + (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x)) + +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)); +} + + +// 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->mdct[0]); + ff_mdct_end(&vc->mdct[1]); + + for(i=0;icodebook_count;++i) { + av_free(vc->codebooks[i].codevectors); + free_vlc(&vc->codebooks[i].vlc); + } + av_freep(&vc->codebooks); + + for(i=0;ifloor_count;++i) { + if(vc->floors[i].floor_type==0) { + av_free(vc->floors[i].data.t0.map[0]); + av_free(vc->floors[i].data.t0.map[1]); + av_free(vc->floors[i].data.t0.book_list); + av_free(vc->floors[i].data.t0.lsp); + } + else { + av_free(vc->floors[i].data.t1.list); + } + } + av_freep(&vc->floors); + + for(i=0;imapping_count;++i) { + av_free(vc->mappings[i].magnitude); + av_free(vc->mappings[i].angle); + av_free(vc->mappings[i].mux); + } + av_freep(&vc->mappings); + + if(vc->exp_bias){ + av_freep(&vc->win[0]); + av_freep(&vc->win[1]); + } +} + +// Parse setup header ------------------------------------------------- + +// Process codebooks part + +static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) { + uint_fast16_t cb; + uint8_t *tmp_vlc_bits; + uint32_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=(uint8_t *)av_mallocz(V_MAX_VLCS * sizeof(uint8_t)); + tmp_vlc_codes=(uint32_t *)av_mallocz(V_MAX_VLCS * sizeof(uint32_t)); + + for(cb=0;cbcodebook_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, " %"PRIdFAST16". 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, " %"PRIdFAST16". 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, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \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;ceused_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=ff_vorbis_nth_root(entries, codebook_setup->dimensions); + uint_fast16_t codebook_multiplicands[codebook_lookup_values]; + + float codebook_minimum_value=vorbisfloat2float(get_bits_long(gb, 32)); + float codebook_delta_value=vorbisfloat2float(get_bits_long(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;icodevectors=(float *)av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float)); + for(j=0, i=0;idimensions; + + 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;kcodevectors[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;kavccontext, 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 (ff_vorbis_len2vlc(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=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; + } + } + + 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;iavccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n"); + return 1; + } + } + return 0; +} + +// Process floors part + +static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc, + vorbis_floor_data *vfu, float *vec); +static void create_map( vorbis_context * vc, uint_fast8_t floor_number ); +static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, + vorbis_floor_data *vfu, float *vec); +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;ifloor_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->decode=vorbis_floor1_decode; + + floor_setup->data.t1.partitions=get_bits(gb, 5); + + AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions); + + for(j=0;jdata.t1.partitions;++j) { + floor_setup->data.t1.partition_class[j]=get_bits(gb, 4); + if (floor_setup->data.t1.partition_class[j]>maximum_class) maximum_class=floor_setup->data.t1.partition_class[j]; + + AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]); + + } + + AV_DEBUG(" maximum class %d \n", maximum_class); + + floor_setup->data.t1.maximum_class=maximum_class; + + for(j=0;j<=maximum_class;++j) { + floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1; + floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2); + + AV_DEBUG(" %d floor %d class dim: %d subclasses %d \n", i, j, floor_setup->data.t1.class_dimensions[j], floor_setup->data.t1.class_subclasses[j]); + + if (floor_setup->data.t1.class_subclasses[j]) { + floor_setup->data.t1.class_masterbook[j]=get_bits(gb, 8); + + AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]); + } + + for(k=0;k<(1<data.t1.class_subclasses[j]);++k) { + floor_setup->data.t1.subclass_books[j][k]=(int16_t)get_bits(gb, 8)-1; + + AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]); + } + } + + floor_setup->data.t1.multiplier=get_bits(gb, 2)+1; + floor_setup->data.t1.x_list_dim=2; + + for(j=0;jdata.t1.partitions;++j) { + floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; + } + + floor_setup->data.t1.list=(floor1_entry_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(floor1_entry_t)); + + + rangebits=get_bits(gb, 4); + floor_setup->data.t1.list[0].x = 0; + floor_setup->data.t1.list[1].x = (1<data.t1.partitions;++j) { + for(k=0;kdata.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];++k,++floor1_values) { + floor_setup->data.t1.list[floor1_values].x=get_bits(gb, rangebits); + + AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.list[floor1_values].x); + } + } + +// Precalculate order of x coordinates - needed for decode + ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim); + } + else if(floor_setup->floor_type==0) { + uint_fast8_t max_codebook_dim=0; + + floor_setup->decode=vorbis_floor0_decode; + + floor_setup->data.t0.order=get_bits(gb, 8); + floor_setup->data.t0.rate=get_bits(gb, 16); + floor_setup->data.t0.bark_map_size=get_bits(gb, 16); + floor_setup->data.t0.amplitude_bits=get_bits(gb, 6); + /* zero would result in a div by zero later * + * 2^0 - 1 == 0 */ + if (floor_setup->data.t0.amplitude_bits == 0) { + av_log(vc->avccontext, AV_LOG_ERROR, + "Floor 0 amplitude bits is 0.\n"); + return 1; + } + floor_setup->data.t0.amplitude_offset=get_bits(gb, 8); + floor_setup->data.t0.num_books=get_bits(gb, 4)+1; + + /* allocate mem for booklist */ + floor_setup->data.t0.book_list= + av_malloc(floor_setup->data.t0.num_books); + if(!floor_setup->data.t0.book_list) { return 1; } + /* read book indexes */ + { + int idx; + uint_fast8_t book_idx; + for (idx=0;idxdata.t0.num_books;++idx) { + book_idx=get_bits(gb, 8); + floor_setup->data.t0.book_list[idx]=book_idx; + if (vc->codebooks[book_idx].dimensions > max_codebook_dim) + max_codebook_dim=vc->codebooks[book_idx].dimensions; + + if (floor_setup->data.t0.book_list[idx]>vc->codebook_count) + return 1; + } + } + + create_map( vc, i ); + + /* allocate mem for lsp coefficients */ + { + /* codebook dim is for padding if codebook dim doesn't * + * divide order+1 then we need to read more data */ + floor_setup->data.t0.lsp= + av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim) + * sizeof(float)); + if(!floor_setup->data.t0.lsp) { return 1; } + } + +#ifdef V_DEBUG /* debug output parsed headers */ + AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order); + AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate); + AV_DEBUG("floor0 bark map size: %u\n", + floor_setup->data.t0.bark_map_size); + AV_DEBUG("floor0 amplitude bits: %u\n", + floor_setup->data.t0.amplitude_bits); + AV_DEBUG("floor0 amplitude offset: %u\n", + floor_setup->data.t0.amplitude_offset); + AV_DEBUG("floor0 number of books: %u\n", + floor_setup->data.t0.num_books); + AV_DEBUG("floor0 book list pointer: %p\n", + floor_setup->data.t0.book_list); + { + int idx; + for (idx=0;idxdata.t0.num_books;++idx) { + AV_DEBUG( " Book %d: %u\n", + idx+1, + floor_setup->data.t0.book_list[idx] ); + } + } +#endif + } + else { + av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\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;iresidue_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;jclassifications;++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;jclassifications;++j) { + for(k=0;k<8;++k) { + if (cascade[j]&(1<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;imapping_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;jcoupling_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;jaudio_channels;++j) { + mapping_setup->mux[j]=get_bits(gb, 4); + } + } + + for(j=0;jsubmaps;++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 void create_map( vorbis_context * vc, uint_fast8_t floor_number ) +{ + vorbis_floor * floors=vc->floors; + vorbis_floor0 * vf; + int idx; + int_fast8_t blockflag; + int_fast32_t * map; + int_fast32_t n; //TODO: could theoretically be smaller? + + for (blockflag=0;blockflag<2;++blockflag) + { + n=vc->blocksize[blockflag]/2; + floors[floor_number].data.t0.map[blockflag]= + av_malloc((n+1) * sizeof(int_fast32_t)); // n+sentinel + + map=floors[floor_number].data.t0.map[blockflag]; + vf=&floors[floor_number].data.t0; + + for (idx=0; idxrate*idx)/(2.0f*n)) * + ((vf->bark_map_size)/ + BARK(vf->rate/2.0f )) ); + if (vf->bark_map_size-1 < map[idx]) { + map[idx]=vf->bark_map_size-1; + } + } + map[n]=-1; + vf->map_size[blockflag]=n; + } + +# ifdef V_DEBUG + for(idx=0;idx<=n;++idx) { + AV_DEBUG("floor0 map: map at pos %d is %d\n", + idx, map[idx]); + } +# endif +} + +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;imode_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; +} + +// Process the identification header + +static int vorbis_parse_id_hdr(vorbis_context *vc){ + GetBitContext *gb=&vc->gb; + uint_fast8_t bl0, bl1; + + 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(gb, 32); //FIXME check 0 + vc->audio_channels=get_bits(gb, 8); //FIXME check >0 + vc->audio_samplerate=get_bits_long(gb, 32); //FIXME check >0 + vc->bitrate_maximum=get_bits_long(gb, 32); + vc->bitrate_nominal=get_bits_long(gb, 32); + vc->bitrate_minimum=get_bits_long(gb, 32); + bl0=get_bits(gb, 4); + bl1=get_bits(gb, 4); + vc->blocksize[0]=(1<blocksize[1]=(1<13 || bl0<6 || bl1>13 || bl1<6 || bl1avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n"); + return 3; + } + // output format int16 + if (vc->blocksize[1]/2 * vc->audio_channels * 2 > + AVCODEC_MAX_AUDIO_FRAME_SIZE) { + av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes " + "output packets too large.\n"); + return 4; + } + vc->win[0]=ff_vorbis_vwin[bl0-6]; + vc->win[1]=ff_vorbis_vwin[bl1-6]; + + if(vc->exp_bias){ + int i, j; + for(j=0; j<2; j++){ + float *win = av_malloc(vc->blocksize[j]/2 * sizeof(float)); + for(i=0; iblocksize[j]/2; i++) + win[i] = vc->win[j][i] * (1<<15); + vc->win[j] = win; + } + } + + 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->mdct[0], bl0, 1); + ff_mdct_init(&vc->mdct[1], 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;iwin[0][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 hdr_type; + + vc->avccontext = avccontext; + dsputil_init(&vc->dsp, avccontext); + + if(vc->dsp.float_to_int16 == ff_float_to_int16_c) { + vc->add_bias = 385; + vc->exp_bias = 0; + } else { + vc->add_bias = 0; + vc->exp_bias = 15<<23; + } + + if (!headers_len) { + av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n"); + return -1; + } + + if (ff_split_xiph_headers(headers, headers_len, 30, header_start, header_len) < 0) { + 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 + +static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc, + vorbis_floor_data *vfu, float *vec) { + vorbis_floor0 * vf=&vfu->t0; + float * lsp=vf->lsp; + uint_fast32_t amplitude; + uint_fast32_t book_idx; + uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag; + + amplitude=get_bits(&vc->gb, vf->amplitude_bits); + if (amplitude>0) { + float last = 0; + uint_fast16_t lsp_len = 0; + uint_fast16_t idx; + vorbis_codebook codebook; + + book_idx=get_bits(&vc->gb, ilog(vf->num_books)); + if ( book_idx >= vf->num_books ) { + av_log( vc->avccontext, AV_LOG_ERROR, + "floor0 dec: booknumber too high!\n" ); + //FIXME: look above + } + AV_DEBUG( "floor0 dec: booknumber: %u\n", book_idx ); + codebook=vc->codebooks[vf->book_list[book_idx]]; + + while (lsp_lenorder) { + int vec_off; + + AV_DEBUG( "floor0 dec: book dimension: %d\n", codebook.dimensions ); + AV_DEBUG( "floor0 dec: maximum depth: %d\n", codebook.maxdepth ); + /* read temp vector */ + vec_off=get_vlc2(&vc->gb, + codebook.vlc.table, + codebook.nb_bits, + codebook.maxdepth ) * + codebook.dimensions; + AV_DEBUG( "floor0 dec: vector offset: %d\n", vec_off ); + /* copy each vector component and add last to it */ + for (idx=0; idxorder; + float wstep=M_PI/vf->bark_map_size; + + for(i=0;imap_size, order, wstep); + + i=0; + while(imap_size[blockflag]) { + int j, iter_cond=vf->map[blockflag][i]; + float p=0.5f; + float q=0.5f; + float two_cos_w=2.0f*cos(wstep*iter_cond); // needed all times + + /* similar part for the q and p products */ + for(j=0;jamplitude_offset)/ + (((1<amplitude_bits)-1) * sqrt(p+q)) ) + - vf->amplitude_offset ) * .11512925f + ); + } + + /* fill vector */ + do { vec[i]=q; ++i; }while(vf->map[blockflag][i]==iter_cond); + } + } + } + else { + /* this channel is unused */ + return 1; + } + + AV_DEBUG(" Floor0 decoded\n"); + + return 0; +} + +static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec) { + vorbis_floor1 * vf=&vfu->t1; + 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]; + int 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; + /*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ? + int_fast16_t dy, err; + + + 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;ipartitions;++i) { + class_=vf->partition_class[i]; + cdim=vf->class_dimensions[class_]; + cbits=vf->class_subclasses[class_]; + csub=(1<codebooks[vf->class_masterbook[class_]].vlc.table, + vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3); + } + + for(j=0;jsubclass_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>-1) { + 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->list[offset+j].x, 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;ix_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->list[i].low; + high_neigh_offs=vf->list[i].high; + dy=floor1_Y_final[high_neigh_offs]-floor1_Y_final[low_neigh_offs]; // render_point begin + adx=vf->list[high_neigh_offs].x-vf->list[low_neigh_offs].x; + ady= FFABS(dy); + err=ady*(vf->list[i].x-vf->list[low_neigh_offs].x); + off=(int16_t)err/(int16_t)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->list[i].x, floor1_Y_final[i], val); + } + +// Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ? + + ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x); + + 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;jmaxpass;++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_countclassifications]; + for(j_times_ptns_to_read=0, j=0;jcodebooks[vr->classbook].vlc.table, + vc->codebooks[vr->classbook].nb_bits, 3); + + AV_DEBUG("Classword: %d \n", temp); + + assert(vr->classifications > 1 && temp<=65536); //needed for inverse[] + for(i=0;i>32; + if (partition_count+c_p_c-1-i < ptns_to_read) { + 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;(ibooks[vqclass][pass]; + + if (vqbook>=0) { + uint_fast16_t coffs; + unsigned dim= vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64 + uint_fast16_t step= dim==1 ? vr->partition_size + : FASTDIV(vr->partition_size, dim); + vorbis_codebook codebook= vc->codebooks[vqbook]; + + if (vr->type==0) { + + voffs=voffset+j*vlen; + for(k=0;ktype==1) { + voffs=voffset+j*vlen; + for(k=0;ktype==2 && ch==2 && (voffset&1)==0 && (dim&1)==0) { // most frequent case optimized + voffs=voffset>>1; + + if(dim==2) { + for(k=0;ktype==2) { + voffs=voffset; + + for(k=0;kavccontext, 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; +} + +void vorbis_inverse_coupling(float *mag, float *ang, int blocksize) +{ + int i; + for(i=0; i0.0) { + if (ang[i]>0.0) { + ang[i]=mag[i]-ang[i]; + } else { + float temp=ang[i]; + ang[i]=mag[i]; + mag[i]+=temp; + } + } else { + if (ang[i]>0.0) { + ang[i]+=mag[i]; + } else { + float temp=ang[i]; + ang[i]=mag[i]; + mag[i]-=temp; + } + } + } +} + +// Decode the audio packet using the functions above + +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; + float fadd_bias = vc->add_bias; + + 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)); + } + vc->mode_number=mode_number; + 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->blocksize[vc->modes[mode_number].blockflag]; + 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 + + for(i=0;iaudio_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]=floor->decode(vc, &floor->data, 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;isubmaps;++i) { + vorbis_residue *residue; + uint_fast8_t ch=0; + + for(j=0;jaudio_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; + vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2); + } + +// Dotproduct + + for(j=0, ch_floor_ptr=vc->channel_floors;jaudio_channels;++j,ch_floor_ptr+=blocksize/2) { + ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2; + vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2); + } + +// MDCT, overlap/add, save data for next overlapping FPMATH + + for(j=0;jaudio_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->win[1]; + const float *swin=vc->win[0]; + float *buf=vc->buf; + float *buf_tmp=vc->buf_tmp; + + ch_floor_ptr=vc->channel_floors+j*blocksize/2; + + saved_start=vc->saved_start; + + vc->mdct[0].fft.imdct_calc(&vc->mdct[vc->modes[mode_number].blockflag], buf, ch_floor_ptr, buf_tmp); + + //FIXME process channels together, to allow faster simd vector_fmul_add_add? + if (vc->modes[mode_number].blockflag) { + // -- overlap/add + if (previous_window) { + vc->dsp.vector_fmul_add_add(ret+j, buf, lwin, saved, vc->add_bias, vc->blocksize[1]/2, step); + retlen=vc->blocksize[1]/2; + } else { + int len = (vc->blocksize[1]-vc->blocksize[0])/4; + buf += len; + vc->dsp.vector_fmul_add_add(ret+j, buf, swin, saved, vc->add_bias, vc->blocksize[0]/2, step); + k = vc->blocksize[0]/2*step + j; + buf += vc->blocksize[0]/2; + if(vc->exp_bias){ + for(i=0; iexp_bias; // ret[k]=buf[i]*(1<buf; + retlen=vc->blocksize[0]/2+len; + } + // -- save + if (next_window) { + buf += vc->blocksize[1]/2; + vc->dsp.vector_fmul_reverse(saved, buf, lwin, vc->blocksize[1]/2); + saved_start=0; + } else { + saved_start=(vc->blocksize[1]-vc->blocksize[0])/4; + buf += vc->blocksize[1]/2; + for(i=0; iexp_bias; + vc->dsp.vector_fmul_reverse(saved+saved_start, buf+saved_start, swin, vc->blocksize[0]/2); + } + } else { + // --overlap/add + if(vc->add_bias) { + for(k=j, i=0;idsp.vector_fmul_add_add(ret+k, buf, swin, saved+saved_start, vc->add_bias, vc->blocksize[0]/2, step); + retlen=saved_start+vc->blocksize[0]/2; + // -- save + buf += vc->blocksize[0]/2; + vc->dsp.vector_fmul_reverse(saved, buf, swin, vc->blocksize[0]/2); + 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 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); + + vc->dsp.float_to_int16(data, vc->ret, len); + *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, +}; + -- 2.7.4