X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fcook.c;h=3b7a4fd51bedfc983b472c37dbd82a66f91c0ca2;hb=594d4d5df3c70404168701dd5c90b7e6e5587793;hp=9a3221414a8fdff47e0b1c3d697fd20031cb6790;hpb=f66e4f5f9eac8eb022fad4f85d8d2e99b26c254f;p=ffmpeg diff --git a/libavcodec/cook.c b/libavcodec/cook.c index 9a3221414a8..85565bbd6d3 100644 --- a/libavcodec/cook.c +++ b/libavcodec/cook.c @@ -3,27 +3,26 @@ * Copyright (c) 2003 Sascha Sommer * Copyright (c) 2005 Benjamin Larsson * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav 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, + * Libav 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 + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * */ /** - * @file cook.c - * Cook compatible decoder. + * @file + * Cook compatible decoder. Bastardization of the G.722.1 standard. * This decoder handles RealNetworks, RealAudio G2 data. * Cook is identified by the codec name cook in RM files. * @@ -43,15 +42,15 @@ * available. */ -#include -#include -#include - +#include "libavutil/channel_layout.h" +#include "libavutil/lfg.h" #include "avcodec.h" -#include "bitstream.h" +#include "get_bits.h" #include "dsputil.h" -#include "common.h" #include "bytestream.h" +#include "fft.h" +#include "internal.h" +#include "sinewin.h" #include "cookdata.h" @@ -59,211 +58,204 @@ #define MONO 0x1000001 #define STEREO 0x1000002 #define JOINT_STEREO 0x1000003 -#define MC_COOK 0x2000000 //multichannel Cook, not supported +#define MC_COOK 0x2000000 // multichannel Cook, not supported #define SUBBAND_SIZE 20 -//#define COOKDEBUG +#define MAX_SUBPACKETS 5 typedef struct { - int size; - int loccode[8]; - int levcode[8]; -} COOKgain; + int *now; + int *previous; +} cook_gains; typedef struct { - GetBitContext gb; - /* stream data */ - int nb_channels; - int joint_stereo; - int bit_rate; - int sample_rate; - int samples_per_channel; - int samples_per_frame; + int ch_idx; + int size; + int num_channels; + int cookversion; int subbands; - int log2_numvector_size; - int numvector_size; //1 << log2_numvector_size; int js_subband_start; + int js_vlc_bits; + int samples_per_channel; + int log2_numvector_size; + unsigned int channel_mask; + VLC channel_coupling; + int joint_stereo; + int bits_per_subpacket; + int bits_per_subpdiv; int total_subbands; + int numvector_size; // 1 << log2_numvector_size; + + float mono_previous_buffer1[1024]; + float mono_previous_buffer2[1024]; + + cook_gains gains1; + cook_gains gains2; + int gain_1[9]; + int gain_2[9]; + int gain_3[9]; + int gain_4[9]; +} COOKSubpacket; + +typedef struct cook { + /* + * The following 5 functions provide the lowlevel arithmetic on + * the internal audio buffers. + */ + void (*scalar_dequant)(struct cook *q, int index, int quant_index, + int *subband_coef_index, int *subband_coef_sign, + float *mlt_p); + + void (*decouple)(struct cook *q, + COOKSubpacket *p, + int subband, + float f1, float f2, + float *decode_buffer, + float *mlt_buffer1, float *mlt_buffer2); + + void (*imlt_window)(struct cook *q, float *buffer1, + cook_gains *gains_ptr, float *previous_buffer); + + void (*interpolate)(struct cook *q, float *buffer, + int gain_index, int gain_index_next); + + void (*saturate_output)(struct cook *q, float *out); + + AVCodecContext* avctx; + DSPContext dsp; + AVFrame frame; + GetBitContext gb; + /* stream data */ int num_vectors; - int bits_per_subpacket; - int cookversion; + int samples_per_channel; /* states */ - int random_state; + AVLFG random_state; + int discarded_packets; /* transform data */ - FFTContext fft_ctx; - DECLARE_ALIGNED_16(FFTSample, mlt_tmp[1024]); /* temporary storage for imlt */ + FFTContext mdct_ctx; float* mlt_window; - float* mlt_precos; - float* mlt_presin; - float* mlt_postcos; - int fft_size; - int fft_order; - int mlt_size; //modulated lapped transform size - - /* gain buffers */ - COOKgain *gain_ptr1[2]; - COOKgain *gain_ptr2[2]; - COOKgain gain_1; - COOKgain gain_2; - COOKgain gain_3; - COOKgain gain_4; /* VLC data */ - int js_vlc_bits; VLC envelope_quant_index[13]; - VLC sqvh[7]; //scalar quantization - VLC ccpl; //channel coupling + VLC sqvh[7]; // scalar quantization /* generatable tables and related variables */ int gain_size_factor; float gain_table[23]; - float pow2tab[127]; - float rootpow2tab[127]; /* data buffers */ uint8_t* decoded_bytes_buffer; - DECLARE_ALIGNED_16(float,mono_mdct_output[2048]); - float mono_previous_buffer1[1024]; - float mono_previous_buffer2[1024]; + DECLARE_ALIGNED(32, float, mono_mdct_output)[2048]; float decode_buffer_1[1024]; float decode_buffer_2[1024]; -} COOKContext; - -/* debug functions */ - -#ifdef COOKDEBUG -static void dump_float_table(float* table, int size, int delimiter) { - int i=0; - av_log(NULL,AV_LOG_ERROR,"\n[%d]: ",i); - for (i=0 ; ipow2tab[63] = 1.0; - for (i=1 ; i<64 ; i++){ - q->pow2tab[63+i]=(float)((uint64_t)1<pow2tab[63-i]=1.0/(float)((uint64_t)1<rootpow2tab[63] = 1.0; - for (i=1 ; i<64 ; i++){ - q->rootpow2tab[63+i]=sqrt((float)((uint64_t)1<rootpow2tab[63-i]=sqrt(1.0/(float)((uint64_t)1<gain_size_factor = q->samples_per_channel/8; - for (i=0 ; i<23 ; i++) { - q->gain_table[i] = pow((double)q->pow2tab[i+52] , - (1.0/(double)q->gain_size_factor)); - } + q->gain_size_factor = q->samples_per_channel / 8; + for (i = 0; i < 23; i++) + q->gain_table[i] = pow(pow2tab[i + 52], + (1.0 / (double) q->gain_size_factor)); } -static int init_cook_vlc_tables(COOKContext *q) { +static av_cold int init_cook_vlc_tables(COOKContext *q) +{ int i, result; result = 0; - for (i=0 ; i<13 ; i++) { - result &= init_vlc (&q->envelope_quant_index[i], 9, 24, - envelope_quant_index_huffbits[i], 1, 1, - envelope_quant_index_huffcodes[i], 2, 2, 0); + for (i = 0; i < 13; i++) { + result |= init_vlc(&q->envelope_quant_index[i], 9, 24, + envelope_quant_index_huffbits[i], 1, 1, + envelope_quant_index_huffcodes[i], 2, 2, 0); } - av_log(NULL,AV_LOG_DEBUG,"sqvh VLC init\n"); - for (i=0 ; i<7 ; i++) { - result &= init_vlc (&q->sqvh[i], vhvlcsize_tab[i], vhsize_tab[i], - cvh_huffbits[i], 1, 1, - cvh_huffcodes[i], 2, 2, 0); + av_log(q->avctx, AV_LOG_DEBUG, "sqvh VLC init\n"); + for (i = 0; i < 7; i++) { + result |= init_vlc(&q->sqvh[i], vhvlcsize_tab[i], vhsize_tab[i], + cvh_huffbits[i], 1, 1, + cvh_huffcodes[i], 2, 2, 0); } - if (q->nb_channels==2 && q->joint_stereo==1){ - result &= init_vlc (&q->ccpl, 6, (1<js_vlc_bits)-1, - ccpl_huffbits[q->js_vlc_bits-2], 1, 1, - ccpl_huffcodes[q->js_vlc_bits-2], 2, 2, 0); - av_log(NULL,AV_LOG_DEBUG,"Joint-stereo VLC used.\n"); + for (i = 0; i < q->num_subpackets; i++) { + if (q->subpacket[i].joint_stereo == 1) { + result |= init_vlc(&q->subpacket[i].channel_coupling, 6, + (1 << q->subpacket[i].js_vlc_bits) - 1, + ccpl_huffbits[q->subpacket[i].js_vlc_bits - 2], 1, 1, + ccpl_huffcodes[q->subpacket[i].js_vlc_bits - 2], 2, 2, 0); + av_log(q->avctx, AV_LOG_DEBUG, "subpacket %i Joint-stereo VLC used.\n", i); + } } - av_log(NULL,AV_LOG_DEBUG,"VLC tables initialized.\n"); + av_log(q->avctx, AV_LOG_DEBUG, "VLC tables initialized.\n"); return result; } -static int init_cook_mlt(COOKContext *q) { - int j; - float alpha; +static av_cold int init_cook_mlt(COOKContext *q) +{ + int j, ret; + int mlt_size = q->samples_per_channel; - /* Allocate the buffers, could be replaced with a static [512] - array if needed. */ - q->mlt_size = q->samples_per_channel; - q->mlt_window = av_malloc(sizeof(float)*q->mlt_size); - q->mlt_precos = av_malloc(sizeof(float)*q->mlt_size/2); - q->mlt_presin = av_malloc(sizeof(float)*q->mlt_size/2); - q->mlt_postcos = av_malloc(sizeof(float)*q->mlt_size/2); + if ((q->mlt_window = av_malloc(mlt_size * sizeof(*q->mlt_window))) == 0) + return AVERROR(ENOMEM); /* Initialize the MLT window: simple sine window. */ - alpha = M_PI / (2.0 * (float)q->mlt_size); - for(j=0 ; jmlt_size ; j++) { - q->mlt_window[j] = sin((j + 512.0/(float)q->mlt_size) * alpha); - } - - /* pre/post twiddle factors */ - for (j=0 ; jmlt_size/2 ; j++){ - q->mlt_precos[j] = cos( ((j+0.25)*M_PI)/q->mlt_size); - q->mlt_presin[j] = sin( ((j+0.25)*M_PI)/q->mlt_size); - q->mlt_postcos[j] = (float)sqrt(2.0/(float)q->mlt_size)*cos( ((float)j*M_PI) /q->mlt_size); //sqrt(2/MLT_size) = scalefactor + ff_sine_window_init(q->mlt_window, mlt_size); + for (j = 0; j < mlt_size; j++) + q->mlt_window[j] *= sqrt(2.0 / q->samples_per_channel); + + /* Initialize the MDCT. */ + if ((ret = ff_mdct_init(&q->mdct_ctx, av_log2(mlt_size) + 1, 1, 1.0 / 32768.0))) { + av_free(q->mlt_window); + return ret; } + av_log(q->avctx, AV_LOG_DEBUG, "MDCT initialized, order = %d.\n", + av_log2(mlt_size) + 1); - /* Initialize the FFT. */ - ff_fft_init(&q->fft_ctx, av_log2(q->mlt_size)-1, 0); - av_log(NULL,AV_LOG_DEBUG,"FFT initialized, order = %d.\n", - av_log2(q->samples_per_channel)-1); + return 0; +} - return (int)(q->mlt_window && q->mlt_precos && q->mlt_presin && q->mlt_postcos); +static av_cold void init_cplscales_table(COOKContext *q) +{ + int i; + for (i = 0; i < 5; i++) + q->cplscales[i] = cplscales[i]; } /*************** init functions end ***********/ +#define DECODE_BYTES_PAD1(bytes) (3 - ((bytes) + 3) % 4) +#define DECODE_BYTES_PAD2(bytes) ((bytes) % 4 + DECODE_BYTES_PAD1(2 * (bytes))) + /** * Cook indata decoding, every 32 bits are XORed with 0x37c511f2. * Why? No idea, some checksum/error detection method maybe. * * Out buffer size: extra bytes are needed to cope with - * padding/missalignment. + * padding/misalignment. * Subpackets passed to the decoder can contain two, consecutive * half-subpackets, of identical but arbitrary size. * 1234 1234 1234 1234 extraA extraB @@ -278,90 +270,84 @@ static int init_cook_mlt(COOKContext *q) { * @param out pointer to byte array of outdata * @param bytes number of bytes */ -#define DECODE_BYTES_PAD1(bytes) (3 - ((bytes)+3) % 4) -#define DECODE_BYTES_PAD2(bytes) ((bytes) % 4 + DECODE_BYTES_PAD1(2 * (bytes))) - -static inline int decode_bytes(uint8_t* inbuffer, uint8_t* out, int bytes){ +static inline int decode_bytes(const uint8_t *inbuffer, uint8_t *out, int bytes) +{ + static const uint32_t tab[4] = { + AV_BE2NE32C(0x37c511f2u), AV_BE2NE32C(0xf237c511u), + AV_BE2NE32C(0x11f237c5u), AV_BE2NE32C(0xc511f237u), + }; int i, off; uint32_t c; - uint32_t* buf; - uint32_t* obuf = (uint32_t*) out; + const uint32_t *buf; + uint32_t *obuf = (uint32_t *) out; /* FIXME: 64 bit platforms would be able to do 64 bits at a time. * I'm too lazy though, should be something like - * for(i=0 ; i> (off*8)) | (0x37c511f2 << (32-(off*8)))); + off = (intptr_t) inbuffer & 3; + buf = (const uint32_t *) (inbuffer - off); + c = tab[off]; bytes += 3 + off; - for (i = 0; i < bytes/4; i++) + for (i = 0; i < bytes / 4; i++) obuf[i] = c ^ buf[i]; return off; } -/** - * Cook uninit - */ - -static int cook_decode_close(AVCodecContext *avctx) +static av_cold int cook_decode_close(AVCodecContext *avctx) { int i; COOKContext *q = avctx->priv_data; - av_log(avctx,AV_LOG_DEBUG, "Deallocating memory.\n"); + av_log(avctx, AV_LOG_DEBUG, "Deallocating memory.\n"); /* Free allocated memory buffers. */ av_free(q->mlt_window); - av_free(q->mlt_precos); - av_free(q->mlt_presin); - av_free(q->mlt_postcos); av_free(q->decoded_bytes_buffer); /* Free the transform. */ - ff_fft_end(&q->fft_ctx); + ff_mdct_end(&q->mdct_ctx); /* Free the VLC tables. */ - for (i=0 ; i<13 ; i++) { - free_vlc(&q->envelope_quant_index[i]); - } - for (i=0 ; i<7 ; i++) { - free_vlc(&q->sqvh[i]); - } - if(q->nb_channels==2 && q->joint_stereo==1 ){ - free_vlc(&q->ccpl); - } + for (i = 0; i < 13; i++) + ff_free_vlc(&q->envelope_quant_index[i]); + for (i = 0; i < 7; i++) + ff_free_vlc(&q->sqvh[i]); + for (i = 0; i < q->num_subpackets; i++) + ff_free_vlc(&q->subpacket[i].channel_coupling); - av_log(NULL,AV_LOG_DEBUG,"Memory deallocated.\n"); + av_log(avctx, AV_LOG_DEBUG, "Memory deallocated.\n"); return 0; } /** - * Fill the COOKgain structure for the timedomain quantization. + * Fill the gain array for the timedomain quantization. * - * @param q pointer to the COOKContext - * @param gaininfo pointer to the COOKgain + * @param gb pointer to the GetBitContext + * @param gaininfo array[9] of gain indexes */ +static void decode_gain_info(GetBitContext *gb, int *gaininfo) +{ + int i, n; -static void decode_gain_info(GetBitContext *gb, COOKgain* gaininfo) { - int i; - - while (get_bits1(gb)) {} + while (get_bits1(gb)) { + /* NOTHING */ + } - gaininfo->size = get_bits_count(gb) - 1; //amount of elements*2 to update + n = get_bits_count(gb) - 1; // amount of elements*2 to update - if (get_bits_count(gb) - 1 <= 0) return; + i = 0; + while (n--) { + int index = get_bits(gb, 3); + int gain = get_bits1(gb) ? get_bits(gb, 4) - 7 : -1; - for (i=0 ; isize ; i++){ - gaininfo->loccode[i] = get_bits(gb,3); - if (get_bits1(gb)) { - gaininfo->levcode[i] = get_bits(gb,4) - 7; //convert to signed - } else { - gaininfo->levcode[i] = -1; - } + while (i <= index) + gaininfo[i++] = gain; } + while (i <= 8) + gaininfo[i++] = 0; } /** @@ -370,44 +356,37 @@ static void decode_gain_info(GetBitContext *gb, COOKgain* gaininfo) { * @param q pointer to the COOKContext * @param quant_index_table pointer to the array */ +static int decode_envelope(COOKContext *q, COOKSubpacket *p, + int *quant_index_table) +{ + int i, j, vlc_index; -static void decode_envelope(COOKContext *q, int* quant_index_table) { - int i,j, vlc_index; - int bitbias; - - bitbias = get_bits_count(&q->gb); - quant_index_table[0]= get_bits(&q->gb,6) - 6; //This is used later in categorize + quant_index_table[0] = get_bits(&q->gb, 6) - 6; // This is used later in categorize - for (i=1 ; i < q->total_subbands ; i++){ - vlc_index=i; - if (i >= q->js_subband_start * 2) { - vlc_index-=q->js_subband_start; + for (i = 1; i < p->total_subbands; i++) { + vlc_index = i; + if (i >= p->js_subband_start * 2) { + vlc_index -= p->js_subband_start; } else { - vlc_index/=2; - if(vlc_index < 1) vlc_index = 1; + vlc_index /= 2; + if (vlc_index < 1) + vlc_index = 1; + } + if (vlc_index > 13) + vlc_index = 13; // the VLC tables >13 are identical to No. 13 + + j = get_vlc2(&q->gb, q->envelope_quant_index[vlc_index - 1].table, + q->envelope_quant_index[vlc_index - 1].bits, 2); + quant_index_table[i] = quant_index_table[i - 1] + j - 12; // differential encoding + if (quant_index_table[i] > 63 || quant_index_table[i] < -63) { + av_log(q->avctx, AV_LOG_ERROR, + "Invalid quantizer %d at position %d, outside [-63, 63] range\n", + quant_index_table[i], i); + return AVERROR_INVALIDDATA; } - if (vlc_index>13) vlc_index = 13; //the VLC tables >13 are identical to No. 13 - - j = get_vlc2(&q->gb, q->envelope_quant_index[vlc_index-1].table, - q->envelope_quant_index[vlc_index-1].bits,2); - quant_index_table[i] = quant_index_table[i-1] + j - 12; //differential encoding } -} - -/** - * Create the quant value table. - * - * @param q pointer to the COOKContext - * @param quant_value_table pointer to the array - */ -static void inline dequant_envelope(COOKContext *q, int* quant_index_table, - float* quant_value_table){ - - int i; - for(i=0 ; i < q->total_subbands ; i++){ - quant_value_table[i] = q->rootpow2tab[quant_index_table[i]+63]; - } + return 0; } /** @@ -418,121 +397,93 @@ static void inline dequant_envelope(COOKContext *q, int* quant_index_table, * @param category pointer to the category array * @param category_index pointer to the category_index array */ +static void categorize(COOKContext *q, COOKSubpacket *p, int *quant_index_table, + int *category, int *category_index) +{ + int exp_idx, bias, tmpbias1, tmpbias2, bits_left, num_bits, index, v, i, j; + int exp_index2[102] = { 0 }; + int exp_index1[102] = { 0 }; -static void categorize(COOKContext *q, int* quant_index_table, - int* category, int* category_index){ - int exp_idx, bias, tmpbias, bits_left, num_bits, index, v, i, j; - int exp_index2[102]; - int exp_index1[102]; - - int tmp_categorize_array1[128]; - int tmp_categorize_array1_idx=0; - int tmp_categorize_array2[128]; - int tmp_categorize_array2_idx=0; - int category_index_size=0; + int tmp_categorize_array[128 * 2] = { 0 }; + int tmp_categorize_array1_idx = p->numvector_size; + int tmp_categorize_array2_idx = p->numvector_size; - bits_left = q->bits_per_subpacket - get_bits_count(&q->gb); + bits_left = p->bits_per_subpacket - get_bits_count(&q->gb); - if(bits_left > q->samples_per_channel) { + if (bits_left > q->samples_per_channel) bits_left = q->samples_per_channel + - ((bits_left - q->samples_per_channel)*5)/8; - //av_log(NULL, AV_LOG_ERROR, "bits_left = %d\n",bits_left); - } + ((bits_left - q->samples_per_channel) * 5) / 8; - memset(&exp_index1,0,102*sizeof(int)); - memset(&exp_index2,0,102*sizeof(int)); - memset(&tmp_categorize_array1,0,128*sizeof(int)); - memset(&tmp_categorize_array2,0,128*sizeof(int)); - - bias=-32; + bias = -32; /* Estimate bias. */ - for (i=32 ; i>0 ; i=i/2){ + for (i = 32; i > 0; i = i / 2) { num_bits = 0; - index = 0; - for (j=q->total_subbands ; j>0 ; j--){ - exp_idx = (i - quant_index_table[index] + bias) / 2; - if (exp_idx<0){ - exp_idx=0; - } else if(exp_idx >7) { - exp_idx=7; - } + index = 0; + for (j = p->total_subbands; j > 0; j--) { + exp_idx = av_clip((i - quant_index_table[index] + bias) / 2, 0, 7); index++; - num_bits+=expbits_tab[exp_idx]; - } - if(num_bits >= bits_left - 32){ - bias+=i; + num_bits += expbits_tab[exp_idx]; } + if (num_bits >= bits_left - 32) + bias += i; } /* Calculate total number of bits. */ - num_bits=0; - for (i=0 ; itotal_subbands ; i++) { - exp_idx = (bias - quant_index_table[i]) / 2; - if (exp_idx<0) { - exp_idx=0; - } else if(exp_idx >7) { - exp_idx=7; - } + num_bits = 0; + for (i = 0; i < p->total_subbands; i++) { + exp_idx = av_clip((bias - quant_index_table[i]) / 2, 0, 7); num_bits += expbits_tab[exp_idx]; exp_index1[i] = exp_idx; exp_index2[i] = exp_idx; } - tmpbias = bias = num_bits; + tmpbias1 = tmpbias2 = num_bits; - for (j = 1 ; j < q->numvector_size ; j++) { - if (tmpbias + bias > 2*bits_left) { /* ---> */ + for (j = 1; j < p->numvector_size; j++) { + if (tmpbias1 + tmpbias2 > 2 * bits_left) { /* ---> */ int max = -999999; - index=-1; - for (i=0 ; itotal_subbands ; i++){ + index = -1; + for (i = 0; i < p->total_subbands; i++) { if (exp_index1[i] < 7) { - v = (-2*exp_index1[i]) - quant_index_table[i] - 32; - if ( v >= max) { - max = v; + v = (-2 * exp_index1[i]) - quant_index_table[i] + bias; + if (v >= max) { + max = v; index = i; } } } - if(index==-1)break; - tmp_categorize_array1[tmp_categorize_array1_idx++] = index; - tmpbias -= expbits_tab[exp_index1[index]] - - expbits_tab[exp_index1[index]+1]; + if (index == -1) + break; + tmp_categorize_array[tmp_categorize_array1_idx++] = index; + tmpbias1 -= expbits_tab[exp_index1[index]] - + expbits_tab[exp_index1[index] + 1]; ++exp_index1[index]; } else { /* <--- */ int min = 999999; - index=-1; - for (i=0 ; itotal_subbands ; i++){ - if(exp_index2[i] > 0){ - v = (-2*exp_index2[i])-quant_index_table[i]; - if ( v < min) { - min = v; + index = -1; + for (i = 0; i < p->total_subbands; i++) { + if (exp_index2[i] > 0) { + v = (-2 * exp_index2[i]) - quant_index_table[i] + bias; + if (v < min) { + min = v; index = i; } } } - if(index == -1)break; - tmp_categorize_array2[tmp_categorize_array2_idx++] = index; - tmpbias -= expbits_tab[exp_index2[index]] - - expbits_tab[exp_index2[index]-1]; + if (index == -1) + break; + tmp_categorize_array[--tmp_categorize_array2_idx] = index; + tmpbias2 -= expbits_tab[exp_index2[index]] - + expbits_tab[exp_index2[index] - 1]; --exp_index2[index]; } } - for(i=0 ; itotal_subbands ; i++) + for (i = 0; i < p->total_subbands; i++) category[i] = exp_index2[i]; - /* Concatenate the two arrays. */ - for(i=tmp_categorize_array2_idx-1 ; i >= 0; i--) - category_index[category_index_size++] = tmp_categorize_array2[i]; - - for(i=0;inumvector_size;i++) - category_index[i]=0; - + for (i = 0; i < p->numvector_size - 1; i++) + category_index[i] = tmp_categorize_array[tmp_categorize_array2_idx++]; } @@ -543,12 +494,15 @@ static void categorize(COOKContext *q, int* quant_index_table, * @param category pointer to the category array * @param category_index pointer to the category_index array */ - -static void inline expand_category(COOKContext *q, int* category, - int* category_index){ +static inline void expand_category(COOKContext *q, int *category, + int *category_index) +{ int i; - for(i=0 ; inum_vectors ; i++){ - ++category[category_index[i]]; + for (i = 0; i < q->num_vectors; i++) + { + int idx = category_index[i]; + if (++category[idx] >= FF_ARRAY_ELEMS(dither_tab)) + --category[idx]; } } @@ -557,76 +511,69 @@ static void inline expand_category(COOKContext *q, int* category, * * @param q pointer to the COOKContext * @param index index - * @param band current subband - * @param quant_value_table pointer to the array + * @param quant_index quantisation index * @param subband_coef_index array of indexes to quant_centroid_tab - * @param subband_coef_noise use random noise instead of predetermined value - * @param mlt_buffer pointer to the mlt buffer + * @param subband_coef_sign signs of coefficients + * @param mlt_p pointer into the mlt buffer */ - - -static void scalar_dequant(COOKContext *q, int index, int band, - float* quant_value_table, int* subband_coef_index, - int* subband_coef_noise, float* mlt_buffer){ +static void scalar_dequant_float(COOKContext *q, int index, int quant_index, + int *subband_coef_index, int *subband_coef_sign, + float *mlt_p) +{ int i; float f1; - for(i=0 ; irandom_state = q->random_state * 214013 + 2531011; //typical RNG numbers - f1 = randsign[(q->random_state/0x1000000)&1] * dither_tab[index]; //>>31 + /* noise coding if subband_coef_index[i] == 0 */ + f1 = dither_tab[index]; + if (av_lfg_get(&q->random_state) < 0x80000000) + f1 = -f1; } - mlt_buffer[band*20+ i] = f1 * quant_value_table[band]; + mlt_p[i] = f1 * rootpow2tab[quant_index + 63]; } } /** - * Unpack the subband_coef_index and subband_coef_noise vectors. + * Unpack the subband_coef_index and subband_coef_sign vectors. * * @param q pointer to the COOKContext * @param category pointer to the category array * @param subband_coef_index array of indexes to quant_centroid_tab - * @param subband_coef_noise use random noise instead of predetermined value + * @param subband_coef_sign signs of coefficients */ - -static int unpack_SQVH(COOKContext *q, int category, int* subband_coef_index, - int* subband_coef_noise) { - int i,j; - int vlc, vd ,tmp, result; - int ub; - int cb; +static int unpack_SQVH(COOKContext *q, COOKSubpacket *p, int category, + int *subband_coef_index, int *subband_coef_sign) +{ + int i, j; + int vlc, vd, tmp, result; vd = vd_tab[category]; result = 0; - for(i=0 ; igb); + for (i = 0; i < vpr_tab[category]; i++) { vlc = get_vlc2(&q->gb, q->sqvh[category].table, q->sqvh[category].bits, 3); - cb = get_bits_count(&q->gb); - if (q->bits_per_subpacket < get_bits_count(&q->gb)){ + if (p->bits_per_subpacket < get_bits_count(&q->gb)) { vlc = 0; result = 1; } - for(j=vd-1 ; j>=0 ; j--){ - tmp = (vlc * invradix_tab[category])/0x100000; - subband_coef_index[vd*i+j] = vlc - tmp * (kmax_tab[category]+1); + for (j = vd - 1; j >= 0; j--) { + tmp = (vlc * invradix_tab[category]) / 0x100000; + subband_coef_index[vd * i + j] = vlc - tmp * (kmax_tab[category] + 1); vlc = tmp; } - for(j=0 ; jgb) < q->bits_per_subpacket){ - subband_coef_noise[i*vd+j] = get_bits1(&q->gb); + for (j = 0; j < vd; j++) { + if (subband_coef_index[i * vd + j]) { + if (get_bits_count(&q->gb) < p->bits_per_subpacket) { + subband_coef_sign[i * vd + j] = get_bits1(&q->gb); } else { - result=1; - subband_coef_noise[i*vd+j]=0; + result = 1; + subband_coef_sign[i * vd + j] = 0; } } else { - subband_coef_noise[i*vd+j]=0; + subband_coef_sign[i * vd + j] = 0; } } } @@ -639,118 +586,60 @@ static int unpack_SQVH(COOKContext *q, int category, int* subband_coef_index, * * @param q pointer to the COOKContext * @param category pointer to the category array - * @param quant_value_table pointer to the array + * @param quant_index_table pointer to the array * @param mlt_buffer pointer to mlt coefficients */ - - -static void decode_vectors(COOKContext* q, int* category, - float* quant_value_table, float* mlt_buffer){ +static void decode_vectors(COOKContext *q, COOKSubpacket *p, int *category, + int *quant_index_table, float *mlt_buffer) +{ /* A zero in this table means that the subband coefficient is random noise coded. */ - int subband_coef_noise[SUBBAND_SIZE]; + int subband_coef_index[SUBBAND_SIZE]; /* A zero in this table means that the subband coefficient is a positive multiplicator. */ - int subband_coef_index[SUBBAND_SIZE]; + int subband_coef_sign[SUBBAND_SIZE]; int band, j; - int index=0; + int index = 0; - for(band=0 ; bandtotal_subbands ; band++){ + for (band = 0; band < p->total_subbands; band++) { index = category[band]; - if(category[band] < 7){ - if(unpack_SQVH(q, category[band], subband_coef_index, subband_coef_noise)){ - index=7; - for(j=0 ; jtotal_subbands ; j++) category[band+j]=7; + if (category[band] < 7) { + if (unpack_SQVH(q, p, category[band], subband_coef_index, subband_coef_sign)) { + index = 7; + for (j = 0; j < p->total_subbands; j++) + category[band + j] = 7; } } - if(index==7) { + if (index >= 7) { memset(subband_coef_index, 0, sizeof(subband_coef_index)); - memset(subband_coef_noise, 0, sizeof(subband_coef_noise)); + memset(subband_coef_sign, 0, sizeof(subband_coef_sign)); } - scalar_dequant(q, index, band, quant_value_table, subband_coef_index, - subband_coef_noise, mlt_buffer); + q->scalar_dequant(q, index, quant_index_table[band], + subband_coef_index, subband_coef_sign, + &mlt_buffer[band * SUBBAND_SIZE]); } - if(q->total_subbands*SUBBAND_SIZE >= q->samples_per_channel){ + /* FIXME: should this be removed, or moved into loop above? */ + if (p->total_subbands * SUBBAND_SIZE >= q->samples_per_channel) return; - } } -/** - * function for decoding mono data - * - * @param q pointer to the COOKContext - * @param mlt_buffer1 pointer to left channel mlt coefficients - * @param mlt_buffer2 pointer to right channel mlt coefficients - */ - -static void mono_decode(COOKContext *q, float* mlt_buffer) { - - int category_index[128]; - float quant_value_table[102]; +static int mono_decode(COOKContext *q, COOKSubpacket *p, float *mlt_buffer) +{ + int category_index[128] = { 0 }; + int category[128] = { 0 }; int quant_index_table[102]; - int category[128]; + int res; - memset(&category, 0, 128*sizeof(int)); - memset(&quant_value_table, 0, 102*sizeof(int)); - memset(&category_index, 0, 128*sizeof(int)); - - decode_envelope(q, quant_index_table); - q->num_vectors = get_bits(&q->gb,q->log2_numvector_size); - dequant_envelope(q, quant_index_table, quant_value_table); - categorize(q, quant_index_table, category, category_index); + if ((res = decode_envelope(q, p, quant_index_table)) < 0) + return res; + q->num_vectors = get_bits(&q->gb, p->log2_numvector_size); + categorize(q, p, quant_index_table, category, category_index); expand_category(q, category, category_index); - decode_vectors(q, category, quant_value_table, mlt_buffer); -} - - -/** - * The modulated lapped transform, this takes transform coefficients - * and transforms them into timedomain samples. This is done through - * an FFT-based algorithm with pre- and postrotation steps. - * A window and reorder step is also included. - * - * @param q pointer to the COOKContext - * @param inbuffer pointer to the mltcoefficients - * @param outbuffer pointer to the timedomain buffer - * @param mlt_tmp pointer to temporary storage space - */ - -static void cook_imlt(COOKContext *q, float* inbuffer, float* outbuffer, - float* mlt_tmp){ - int i; + decode_vectors(q, p, category, quant_index_table, mlt_buffer); - /* prerotation */ - for(i=0 ; imlt_size ; i+=2){ - outbuffer[i] = (q->mlt_presin[i/2] * inbuffer[q->mlt_size-1-i]) + - (q->mlt_precos[i/2] * inbuffer[i]); - outbuffer[i+1] = (q->mlt_precos[i/2] * inbuffer[q->mlt_size-1-i]) - - (q->mlt_presin[i/2] * inbuffer[i]); - } - - /* FFT */ - ff_fft_permute(&q->fft_ctx, (FFTComplex *) outbuffer); - ff_fft_calc (&q->fft_ctx, (FFTComplex *) outbuffer); - - /* postrotation */ - for(i=0 ; imlt_size ; i+=2){ - mlt_tmp[i] = (q->mlt_postcos[(q->mlt_size-1-i)/2] * outbuffer[i+1]) + - (q->mlt_postcos[i/2] * outbuffer[i]); - mlt_tmp[q->mlt_size-1-i] = (q->mlt_postcos[(q->mlt_size-1-i)/2] * outbuffer[i]) - - (q->mlt_postcos[i/2] * outbuffer[i+1]); - } - - /* window and reorder */ - for(i=0 ; imlt_size/2 ; i++){ - outbuffer[i] = mlt_tmp[q->mlt_size/2-1-i] * q->mlt_window[i]; - outbuffer[q->mlt_size-1-i]= mlt_tmp[q->mlt_size/2-1-i] * - q->mlt_window[q->mlt_size-1-i]; - outbuffer[q->mlt_size+i]= mlt_tmp[q->mlt_size/2+i] * - q->mlt_window[q->mlt_size-1-i]; - outbuffer[2*q->mlt_size-1-i]= -(mlt_tmp[q->mlt_size/2+i] * - q->mlt_window[i]); - } + return 0; } @@ -762,103 +651,82 @@ static void cook_imlt(COOKContext *q, float* inbuffer, float* outbuffer, * @param gain_index index for the block multiplier * @param gain_index_next index for the next block multiplier */ - -static void interpolate(COOKContext *q, float* buffer, - int gain_index, int gain_index_next){ +static void interpolate_float(COOKContext *q, float *buffer, + int gain_index, int gain_index_next) +{ int i; float fc1, fc2; - fc1 = q->pow2tab[gain_index+63]; - - if(gain_index == gain_index_next){ //static gain - for(i=0 ; igain_size_factor ; i++){ - buffer[i]*=fc1; - } - return; - } else { //smooth gain - fc2 = q->gain_table[11 + (gain_index_next-gain_index)]; - for(i=0 ; igain_size_factor ; i++){ - buffer[i]*=fc1; - fc1*=fc2; + fc1 = pow2tab[gain_index + 63]; + + if (gain_index == gain_index_next) { // static gain + for (i = 0; i < q->gain_size_factor; i++) + buffer[i] *= fc1; + } else { // smooth gain + fc2 = q->gain_table[11 + (gain_index_next - gain_index)]; + for (i = 0; i < q->gain_size_factor; i++) { + buffer[i] *= fc1; + fc1 *= fc2; } - return; } } /** - * timedomain requantization of the timedomain samples + * Apply transform window, overlap buffers. * * @param q pointer to the COOKContext - * @param buffer pointer to the timedomain buffer - * @param gain_now current gain structure - * @param gain_previous previous gain structure + * @param inbuffer pointer to the mltcoefficients + * @param gains_ptr current and previous gains + * @param previous_buffer pointer to the previous buffer to be used for overlapping */ +static void imlt_window_float(COOKContext *q, float *inbuffer, + cook_gains *gains_ptr, float *previous_buffer) +{ + const float fc = pow2tab[gains_ptr->previous[0] + 63]; + int i; + /* The weird thing here, is that the two halves of the time domain + * buffer are swapped. Also, the newest data, that we save away for + * next frame, has the wrong sign. Hence the subtraction below. + * Almost sounds like a complex conjugate/reverse data/FFT effect. + */ -static void gain_window(COOKContext *q, float* buffer, COOKgain* gain_now, - COOKgain* gain_previous){ - int i, index; - int gain_index[9]; - int tmp_gain_index; - - gain_index[8]=0; - index = gain_previous->size; - for (i=7 ; i>=0 ; i--) { - if(index && gain_previous->loccode[index-1]==i) { - gain_index[i] = gain_previous->levcode[index-1]; - index--; - } else { - gain_index[i]=gain_index[i+1]; - } - } - /* This is applied to the to be previous data buffer. */ - for(i=0;i<8;i++){ - interpolate(q, &buffer[q->samples_per_channel+q->gain_size_factor*i], - gain_index[i], gain_index[i+1]); - } - - tmp_gain_index = gain_index[0]; - index = gain_now->size; - for (i=7 ; i>=0 ; i--) { - if(index && gain_now->loccode[index-1]==i) { - gain_index[i]= gain_now->levcode[index-1]; - index--; - } else { - gain_index[i]=gain_index[i+1]; - } - } - - /* This is applied to the to be current block. */ - for(i=0;i<8;i++){ - interpolate(q, &buffer[i*q->gain_size_factor], - tmp_gain_index+gain_index[i], - tmp_gain_index+gain_index[i+1]); - } + /* Apply window and overlap */ + for (i = 0; i < q->samples_per_channel; i++) + inbuffer[i] = inbuffer[i] * fc * q->mlt_window[i] - + previous_buffer[i] * q->mlt_window[q->samples_per_channel - 1 - i]; } - /** - * mlt overlapping and buffer management + * The modulated lapped transform, this takes transform coefficients + * and transforms them into timedomain samples. + * Apply transform window, overlap buffers, apply gain profile + * and buffer management. * * @param q pointer to the COOKContext - * @param buffer pointer to the timedomain buffer - * @param gain_now current gain structure - * @param gain_previous previous gain structure + * @param inbuffer pointer to the mltcoefficients + * @param gains_ptr current and previous gains * @param previous_buffer pointer to the previous buffer to be used for overlapping - * */ - -static void gain_compensate(COOKContext *q, float* buffer, COOKgain* gain_now, - COOKgain* gain_previous, float* previous_buffer) { +static void imlt_gain(COOKContext *q, float *inbuffer, + cook_gains *gains_ptr, float *previous_buffer) +{ + float *buffer0 = q->mono_mdct_output; + float *buffer1 = q->mono_mdct_output + q->samples_per_channel; int i; - if((gain_now->size || gain_previous->size)) { - gain_window(q, buffer, gain_now, gain_previous); - } - /* Overlap with the previous block. */ - for(i=0 ; isamples_per_channel ; i++) buffer[i]+=previous_buffer[i]; + /* Inverse modified discrete cosine transform */ + q->mdct_ctx.imdct_calc(&q->mdct_ctx, q->mono_mdct_output, inbuffer); + + q->imlt_window(q, buffer1, gains_ptr, previous_buffer); + + /* Apply gain profile */ + for (i = 0; i < 8; i++) + if (gains_ptr->now[i] || gains_ptr->now[i + 1]) + q->interpolate(q, &buffer1[q->gain_size_factor * i], + gains_ptr->now[i], gains_ptr->now[i + 1]); /* Save away the current to be previous block. */ - memcpy(previous_buffer, buffer+q->samples_per_channel, - sizeof(float)*q->samples_per_channel); + memcpy(previous_buffer, buffer0, + q->samples_per_channel * sizeof(*previous_buffer)); } @@ -867,32 +735,54 @@ static void gain_compensate(COOKContext *q, float* buffer, COOKgain* gain_now, * * @param q pointer to the COOKContext * @param decouple_tab decoupling array - * */ +static void decouple_info(COOKContext *q, COOKSubpacket *p, int *decouple_tab) +{ + int i; + int vlc = get_bits1(&q->gb); + int start = cplband[p->js_subband_start]; + int end = cplband[p->subbands - 1]; + int length = end - start + 1; -static void decouple_info(COOKContext *q, int* decouple_tab){ - int length, i; - - if(get_bits1(&q->gb)) { - if(cplband[q->js_subband_start] > cplband[q->subbands-1]) return; - - length = cplband[q->subbands-1] - cplband[q->js_subband_start] + 1; - for (i=0 ; ijs_subband_start] + i] = get_vlc2(&q->gb, q->ccpl.table, q->ccpl.bits, 2); - } + if (start > end) return; - } - if(cplband[q->js_subband_start] > cplband[q->subbands-1]) return; + if (vlc) + for (i = 0; i < length; i++) + decouple_tab[start + i] = get_vlc2(&q->gb, + p->channel_coupling.table, + p->channel_coupling.bits, 2); + else + for (i = 0; i < length; i++) + decouple_tab[start + i] = get_bits(&q->gb, p->js_vlc_bits); +} - length = cplband[q->subbands-1] - cplband[q->js_subband_start] + 1; - for (i=0 ; ijs_subband_start] + i] = get_bits(&q->gb, q->js_vlc_bits); +/* + * function decouples a pair of signals from a single signal via multiplication. + * + * @param q pointer to the COOKContext + * @param subband index of the current subband + * @param f1 multiplier for channel 1 extraction + * @param f2 multiplier for channel 2 extraction + * @param decode_buffer input buffer + * @param mlt_buffer1 pointer to left channel mlt coefficients + * @param mlt_buffer2 pointer to right channel mlt coefficients + */ +static void decouple_float(COOKContext *q, + COOKSubpacket *p, + int subband, + float f1, float f2, + float *decode_buffer, + float *mlt_buffer1, float *mlt_buffer2) +{ + int j, tmp_idx; + for (j = 0; j < SUBBAND_SIZE; j++) { + tmp_idx = ((p->js_subband_start + subband) * SUBBAND_SIZE) + j; + mlt_buffer1[SUBBAND_SIZE * subband + j] = f1 * decode_buffer[tmp_idx]; + mlt_buffer2[SUBBAND_SIZE * subband + j] = f2 * decode_buffer[tmp_idx]; } - return; } - /** * function for decoding joint stereo data * @@ -900,49 +790,48 @@ static void decouple_info(COOKContext *q, int* decouple_tab){ * @param mlt_buffer1 pointer to left channel mlt coefficients * @param mlt_buffer2 pointer to right channel mlt coefficients */ +static int joint_decode(COOKContext *q, COOKSubpacket *p, + float *mlt_buffer_left, float *mlt_buffer_right) +{ + int i, j, res; + int decouple_tab[SUBBAND_SIZE] = { 0 }; + float *decode_buffer = q->decode_buffer_0; + int idx, cpl_tmp; + float f1, f2; + const float *cplscale; -static void joint_decode(COOKContext *q, float* mlt_buffer1, - float* mlt_buffer2) { - int i,j; - int decouple_tab[SUBBAND_SIZE]; - float decode_buffer[1060]; - int idx, cpl_tmp,tmp_idx; - float f1,f2; - float* cplscale; - - memset(decouple_tab, 0, sizeof(decouple_tab)); - memset(decode_buffer, 0, sizeof(decode_buffer)); + memset(decode_buffer, 0, sizeof(q->decode_buffer_0)); /* Make sure the buffers are zeroed out. */ - memset(mlt_buffer1,0, 1024*sizeof(float)); - memset(mlt_buffer2,0, 1024*sizeof(float)); - decouple_info(q, decouple_tab); - mono_decode(q, decode_buffer); + memset(mlt_buffer_left, 0, 1024 * sizeof(*mlt_buffer_left)); + memset(mlt_buffer_right, 0, 1024 * sizeof(*mlt_buffer_right)); + decouple_info(q, p, decouple_tab); + if ((res = mono_decode(q, p, decode_buffer)) < 0) + return res; /* The two channels are stored interleaved in decode_buffer. */ - for (i=0 ; ijs_subband_start ; i++) { - for (j=0 ; jjs_subband_start; i++) { + for (j = 0; j < SUBBAND_SIZE; j++) { + mlt_buffer_left[i * 20 + j] = decode_buffer[i * 40 + j]; + mlt_buffer_right[i * 20 + j] = decode_buffer[i * 40 + 20 + j]; } } /* When we reach js_subband_start (the higher frequencies) the coefficients are stored in a coupling scheme. */ - idx = (1 << q->js_vlc_bits) - 1; - for (i=q->js_subband_start ; isubbands ; i++) { + idx = (1 << p->js_vlc_bits) - 1; + for (i = p->js_subband_start; i < p->subbands; i++) { cpl_tmp = cplband[i]; - idx -=decouple_tab[cpl_tmp]; - cplscale = (float*)cplscales[q->js_vlc_bits-2]; //choose decoupler table - f1 = cplscale[decouple_tab[cpl_tmp]]; - f2 = cplscale[idx-1]; - for (j=0 ; jjs_subband_start + i)*20)+j; - mlt_buffer1[20*i + j] = f1 * decode_buffer[tmp_idx]; - mlt_buffer2[20*i + j] = f2 * decode_buffer[tmp_idx]; - } - idx = (1 << q->js_vlc_bits) - 1; + idx -= decouple_tab[cpl_tmp]; + cplscale = q->cplscales[p->js_vlc_bits - 2]; // choose decoupler table + f1 = cplscale[decouple_tab[cpl_tmp] + 1]; + f2 = cplscale[idx]; + q->decouple(q, p, i, f1, f2, decode_buffer, + mlt_buffer_left, mlt_buffer_right); + idx = (1 << p->js_vlc_bits) - 1; } + + return 0; } /** @@ -951,25 +840,37 @@ static void joint_decode(COOKContext *q, float* mlt_buffer1, * * @param q pointer to the COOKContext * @param inbuffer pointer to raw stream data - * @param gain_ptr array of current/prev gain pointers + * @param gains_ptr array of current/prev gain pointers */ - -static inline void -decode_bytes_and_gain(COOKContext *q, uint8_t *inbuffer, - COOKgain *gain_ptr[]) +static inline void decode_bytes_and_gain(COOKContext *q, COOKSubpacket *p, + const uint8_t *inbuffer, + cook_gains *gains_ptr) { int offset; offset = decode_bytes(inbuffer, q->decoded_bytes_buffer, - q->bits_per_subpacket/8); + p->bits_per_subpacket / 8); init_get_bits(&q->gb, q->decoded_bytes_buffer + offset, - q->bits_per_subpacket); - decode_gain_info(&q->gb, gain_ptr[0]); + p->bits_per_subpacket); + decode_gain_info(&q->gb, gains_ptr->now); /* Swap current and previous gains */ - FFSWAP(COOKgain *, gain_ptr[0], gain_ptr[1]); + FFSWAP(int *, gains_ptr->now, gains_ptr->previous); } +/** + * Saturate the output signal and interleave. + * + * @param q pointer to the COOKContext + * @param out pointer to the output vector + */ +static void saturate_output_float(COOKContext *q, float *out) +{ + q->dsp.vector_clipf(out, q->mono_mdct_output + q->samples_per_channel, + -1.0f, 1.0f, FFALIGN(q->samples_per_channel, 8)); +} + + /** * Final part of subpacket decoding: * Apply modulated lapped transform, gain compensation, @@ -977,29 +878,17 @@ decode_bytes_and_gain(COOKContext *q, uint8_t *inbuffer, * * @param q pointer to the COOKContext * @param decode_buffer pointer to the mlt coefficients - * @param gain_ptr array of current/prev gain pointers + * @param gains_ptr array of current/prev gain pointers * @param previous_buffer pointer to the previous buffer to be used for overlapping * @param out pointer to the output buffer - * @param chan 0: left or single channel, 1: right channel */ - -static inline void -mlt_compensate_output(COOKContext *q, float *decode_buffer, - COOKgain *gain_ptr[], float *previous_buffer, - int16_t *out, int chan) +static inline void mlt_compensate_output(COOKContext *q, float *decode_buffer, + cook_gains *gains_ptr, float *previous_buffer, + float *out) { - int j; - - cook_imlt(q, decode_buffer, q->mono_mdct_output, q->mlt_tmp); - gain_compensate(q, q->mono_mdct_output, gain_ptr[0], - gain_ptr[1], previous_buffer); - - /* Clip and convert floats to 16 bits. - */ - for (j = 0; j < q->samples_per_channel; j++) { - out[chan + q->nb_channels * j] = - av_clip(lrintf(q->mono_mdct_output[j]), -32768, 32767); - } + imlt_gain(q, decode_buffer, gains_ptr, previous_buffer); + if (out) + q->saturate_output(q, out); } @@ -1009,92 +898,138 @@ mlt_compensate_output(COOKContext *q, float *decode_buffer, * * @param q pointer to the COOKContext * @param inbuffer pointer to the inbuffer - * @param sub_packet_size subpacket size * @param outbuffer pointer to the outbuffer */ +static int decode_subpacket(COOKContext *q, COOKSubpacket *p, + const uint8_t *inbuffer, float **outbuffer) +{ + int sub_packet_size = p->size; + int res; + memset(q->decode_buffer_1, 0, sizeof(q->decode_buffer_1)); + decode_bytes_and_gain(q, p, inbuffer, &p->gains1); -static int decode_subpacket(COOKContext *q, uint8_t *inbuffer, - int sub_packet_size, int16_t *outbuffer) { - /* packet dump */ -// for (i=0 ; igain_ptr1); - - if (q->joint_stereo) { - joint_decode(q, q->decode_buffer_1, q->decode_buffer_2); + if (p->joint_stereo) { + if ((res = joint_decode(q, p, q->decode_buffer_1, q->decode_buffer_2)) < 0) + return res; } else { - mono_decode(q, q->decode_buffer_1); + if ((res = mono_decode(q, p, q->decode_buffer_1)) < 0) + return res; - if (q->nb_channels == 2) { - decode_bytes_and_gain(q, inbuffer + sub_packet_size/2, - q->gain_ptr2); - mono_decode(q, q->decode_buffer_2); + if (p->num_channels == 2) { + decode_bytes_and_gain(q, p, inbuffer + sub_packet_size / 2, &p->gains2); + if ((res = mono_decode(q, p, q->decode_buffer_2)) < 0) + return res; } } - mlt_compensate_output(q, q->decode_buffer_1, q->gain_ptr1, - q->mono_previous_buffer1, outbuffer, 0); + mlt_compensate_output(q, q->decode_buffer_1, &p->gains1, + p->mono_previous_buffer1, + outbuffer ? outbuffer[p->ch_idx] : NULL); - if (q->nb_channels == 2) { - if (q->joint_stereo) { - mlt_compensate_output(q, q->decode_buffer_2, q->gain_ptr1, - q->mono_previous_buffer2, outbuffer, 1); - } else { - mlt_compensate_output(q, q->decode_buffer_2, q->gain_ptr2, - q->mono_previous_buffer2, outbuffer, 1); - } - } - return q->samples_per_frame * sizeof(int16_t); -} + if (p->num_channels == 2) + if (p->joint_stereo) + mlt_compensate_output(q, q->decode_buffer_2, &p->gains1, + p->mono_previous_buffer2, + outbuffer ? outbuffer[p->ch_idx + 1] : NULL); + else + mlt_compensate_output(q, q->decode_buffer_2, &p->gains2, + p->mono_previous_buffer2, + outbuffer ? outbuffer[p->ch_idx + 1] : NULL); + return 0; +} -/** - * Cook frame decoding - * - * @param avctx pointer to the AVCodecContext - */ -static int cook_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - uint8_t *buf, int buf_size) { +static int cook_decode_frame(AVCodecContext *avctx, void *data, + int *got_frame_ptr, AVPacket *avpkt) +{ + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; COOKContext *q = avctx->priv_data; + float **samples = NULL; + int i, ret; + int offset = 0; + int chidx = 0; if (buf_size < avctx->block_align) return buf_size; - *data_size = decode_subpacket(q, buf, avctx->block_align, data); + /* get output buffer */ + if (q->discarded_packets >= 2) { + q->frame.nb_samples = q->samples_per_channel; + if ((ret = ff_get_buffer(avctx, &q->frame)) < 0) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return ret; + } + samples = (float **)q->frame.extended_data; + } + + /* estimate subpacket sizes */ + q->subpacket[0].size = avctx->block_align; + + for (i = 1; i < q->num_subpackets; i++) { + q->subpacket[i].size = 2 * buf[avctx->block_align - q->num_subpackets + i]; + q->subpacket[0].size -= q->subpacket[i].size + 1; + if (q->subpacket[0].size < 0) { + av_log(avctx, AV_LOG_DEBUG, + "frame subpacket size total > avctx->block_align!\n"); + return AVERROR_INVALIDDATA; + } + } + + /* decode supbackets */ + for (i = 0; i < q->num_subpackets; i++) { + q->subpacket[i].bits_per_subpacket = (q->subpacket[i].size * 8) >> + q->subpacket[i].bits_per_subpdiv; + q->subpacket[i].ch_idx = chidx; + av_log(avctx, AV_LOG_DEBUG, + "subpacket[%i] size %i js %i %i block_align %i\n", + i, q->subpacket[i].size, q->subpacket[i].joint_stereo, offset, + avctx->block_align); + + if ((ret = decode_subpacket(q, &q->subpacket[i], buf + offset, samples)) < 0) + return ret; + offset += q->subpacket[i].size; + chidx += q->subpacket[i].num_channels; + av_log(avctx, AV_LOG_DEBUG, "subpacket[%i] %i %i\n", + i, q->subpacket[i].size * 8, get_bits_count(&q->gb)); + } + + /* Discard the first two frames: no valid audio. */ + if (q->discarded_packets < 2) { + q->discarded_packets++; + *got_frame_ptr = 0; + return avctx->block_align; + } + + *got_frame_ptr = 1; + *(AVFrame *) data = q->frame; return avctx->block_align; } -#ifdef COOKDEBUG +#ifdef DEBUG static void dump_cook_context(COOKContext *q) { //int i=0; -#define PRINT(a,b) av_log(NULL,AV_LOG_ERROR," %s = %d\n", a, b); - av_log(NULL,AV_LOG_ERROR,"COOKextradata\n"); - av_log(NULL,AV_LOG_ERROR,"cookversion=%x\n",q->cookversion); - if (q->cookversion > STEREO) { - PRINT("js_subband_start",q->js_subband_start); - PRINT("js_vlc_bits",q->js_vlc_bits); +#define PRINT(a, b) av_dlog(q->avctx, " %s = %d\n", a, b); + av_dlog(q->avctx, "COOKextradata\n"); + av_dlog(q->avctx, "cookversion=%x\n", q->subpacket[0].cookversion); + if (q->subpacket[0].cookversion > STEREO) { + PRINT("js_subband_start", q->subpacket[0].js_subband_start); + PRINT("js_vlc_bits", q->subpacket[0].js_vlc_bits); } - av_log(NULL,AV_LOG_ERROR,"COOKContext\n"); - PRINT("nb_channels",q->nb_channels); - PRINT("bit_rate",q->bit_rate); - PRINT("sample_rate",q->sample_rate); - PRINT("samples_per_channel",q->samples_per_channel); - PRINT("samples_per_frame",q->samples_per_frame); - PRINT("subbands",q->subbands); - PRINT("random_state",q->random_state); - PRINT("mlt_size",q->mlt_size); - PRINT("js_subband_start",q->js_subband_start); - PRINT("log2_numvector_size",q->log2_numvector_size); - PRINT("numvector_size",q->numvector_size); - PRINT("total_subbands",q->total_subbands); + av_dlog(q->avctx, "COOKContext\n"); + PRINT("nb_channels", q->avctx->channels); + PRINT("bit_rate", q->avctx->bit_rate); + PRINT("sample_rate", q->avctx->sample_rate); + PRINT("samples_per_channel", q->subpacket[0].samples_per_channel); + PRINT("subbands", q->subpacket[0].subbands); + PRINT("js_subband_start", q->subpacket[0].js_subband_start); + PRINT("log2_numvector_size", q->subpacket[0].log2_numvector_size); + PRINT("numvector_size", q->subpacket[0].numvector_size); + PRINT("total_subbands", q->subpacket[0].total_subbands); } #endif @@ -1103,167 +1038,235 @@ static void dump_cook_context(COOKContext *q) * * @param avctx pointer to the AVCodecContext */ - -static int cook_decode_init(AVCodecContext *avctx) +static av_cold int cook_decode_init(AVCodecContext *avctx) { COOKContext *q = avctx->priv_data; - uint8_t *edata_ptr = avctx->extradata; + const uint8_t *edata_ptr = avctx->extradata; + const uint8_t *edata_ptr_end = edata_ptr + avctx->extradata_size; + int extradata_size = avctx->extradata_size; + int s = 0; + unsigned int channel_mask = 0; + int samples_per_frame; + int ret; + q->avctx = avctx; /* Take care of the codec specific extradata. */ - if (avctx->extradata_size <= 0) { - av_log(avctx,AV_LOG_ERROR,"Necessary extradata missing!\n"); - return -1; - } else { + if (extradata_size <= 0) { + av_log(avctx, AV_LOG_ERROR, "Necessary extradata missing!\n"); + return AVERROR_INVALIDDATA; + } + av_log(avctx, AV_LOG_DEBUG, "codecdata_length=%d\n", avctx->extradata_size); + + /* Take data from the AVCodecContext (RM container). */ + if (!avctx->channels) { + av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n"); + return AVERROR_INVALIDDATA; + } + + /* Initialize RNG. */ + av_lfg_init(&q->random_state, 0); + + ff_dsputil_init(&q->dsp, avctx); + + while (edata_ptr < edata_ptr_end) { /* 8 for mono, 16 for stereo, ? for multichannel Swap to right endianness so we don't need to care later on. */ - av_log(avctx,AV_LOG_DEBUG,"codecdata_length=%d\n",avctx->extradata_size); - if (avctx->extradata_size >= 8){ - q->cookversion = bytestream_get_be32(&edata_ptr); - q->samples_per_frame = bytestream_get_be16(&edata_ptr); - q->subbands = bytestream_get_be16(&edata_ptr); + if (extradata_size >= 8) { + q->subpacket[s].cookversion = bytestream_get_be32(&edata_ptr); + samples_per_frame = bytestream_get_be16(&edata_ptr); + q->subpacket[s].subbands = bytestream_get_be16(&edata_ptr); + extradata_size -= 8; } - if (avctx->extradata_size >= 16){ - bytestream_get_be32(&edata_ptr); //Unknown unused - q->js_subband_start = bytestream_get_be16(&edata_ptr); - q->js_vlc_bits = bytestream_get_be16(&edata_ptr); + if (extradata_size >= 8) { + bytestream_get_be32(&edata_ptr); // Unknown unused + q->subpacket[s].js_subband_start = bytestream_get_be16(&edata_ptr); + q->subpacket[s].js_vlc_bits = bytestream_get_be16(&edata_ptr); + extradata_size -= 8; } - } - /* Take data from the AVCodecContext (RM container). */ - q->sample_rate = avctx->sample_rate; - q->nb_channels = avctx->channels; - q->bit_rate = avctx->bit_rate; - - /* Initialize state. */ - q->random_state = 1; + /* Initialize extradata related variables. */ + q->subpacket[s].samples_per_channel = samples_per_frame / avctx->channels; + q->subpacket[s].bits_per_subpacket = avctx->block_align * 8; - /* Initialize extradata related variables. */ - q->samples_per_channel = q->samples_per_frame / q->nb_channels; - q->bits_per_subpacket = avctx->block_align * 8; + /* Initialize default data states. */ + q->subpacket[s].log2_numvector_size = 5; + q->subpacket[s].total_subbands = q->subpacket[s].subbands; + q->subpacket[s].num_channels = 1; - /* Initialize default data states. */ - q->log2_numvector_size = 5; - q->total_subbands = q->subbands; + /* Initialize version-dependent variables */ - /* Initialize version-dependent variables */ - av_log(NULL,AV_LOG_DEBUG,"q->cookversion=%x\n",q->cookversion); - q->joint_stereo = 0; - switch (q->cookversion) { + av_log(avctx, AV_LOG_DEBUG, "subpacket[%i].cookversion=%x\n", s, + q->subpacket[s].cookversion); + q->subpacket[s].joint_stereo = 0; + switch (q->subpacket[s].cookversion) { case MONO: - if (q->nb_channels != 1) { - av_log(avctx,AV_LOG_ERROR,"Container channels != 1, report sample!\n"); - return -1; + if (avctx->channels != 1) { + av_log_ask_for_sample(avctx, "Container channels != 1.\n"); + return AVERROR_PATCHWELCOME; } - av_log(avctx,AV_LOG_DEBUG,"MONO\n"); + av_log(avctx, AV_LOG_DEBUG, "MONO\n"); break; case STEREO: - if (q->nb_channels != 1) { - q->bits_per_subpacket = q->bits_per_subpacket/2; + if (avctx->channels != 1) { + q->subpacket[s].bits_per_subpdiv = 1; + q->subpacket[s].num_channels = 2; } - av_log(avctx,AV_LOG_DEBUG,"STEREO\n"); + av_log(avctx, AV_LOG_DEBUG, "STEREO\n"); break; case JOINT_STEREO: - if (q->nb_channels != 2) { - av_log(avctx,AV_LOG_ERROR,"Container channels != 2, report sample!\n"); - return -1; + if (avctx->channels != 2) { + av_log_ask_for_sample(avctx, "Container channels != 2.\n"); + return AVERROR_PATCHWELCOME; } - av_log(avctx,AV_LOG_DEBUG,"JOINT_STEREO\n"); - if (avctx->extradata_size >= 16){ - q->total_subbands = q->subbands + q->js_subband_start; - q->joint_stereo = 1; + av_log(avctx, AV_LOG_DEBUG, "JOINT_STEREO\n"); + if (avctx->extradata_size >= 16) { + q->subpacket[s].total_subbands = q->subpacket[s].subbands + + q->subpacket[s].js_subband_start; + q->subpacket[s].joint_stereo = 1; + q->subpacket[s].num_channels = 2; } - if (q->samples_per_channel > 256) { - q->log2_numvector_size = 6; + if (q->subpacket[s].samples_per_channel > 256) { + q->subpacket[s].log2_numvector_size = 6; } - if (q->samples_per_channel > 512) { - q->log2_numvector_size = 7; + if (q->subpacket[s].samples_per_channel > 512) { + q->subpacket[s].log2_numvector_size = 7; } break; case MC_COOK: - av_log(avctx,AV_LOG_ERROR,"MC_COOK not supported!\n"); - return -1; + av_log(avctx, AV_LOG_DEBUG, "MULTI_CHANNEL\n"); + if (extradata_size >= 4) + channel_mask |= q->subpacket[s].channel_mask = bytestream_get_be32(&edata_ptr); + + if (av_get_channel_layout_nb_channels(q->subpacket[s].channel_mask) > 1) { + q->subpacket[s].total_subbands = q->subpacket[s].subbands + + q->subpacket[s].js_subband_start; + q->subpacket[s].joint_stereo = 1; + q->subpacket[s].num_channels = 2; + q->subpacket[s].samples_per_channel = samples_per_frame >> 1; + + if (q->subpacket[s].samples_per_channel > 256) { + q->subpacket[s].log2_numvector_size = 6; + } + if (q->subpacket[s].samples_per_channel > 512) { + q->subpacket[s].log2_numvector_size = 7; + } + } else + q->subpacket[s].samples_per_channel = samples_per_frame; + break; default: - av_log(avctx,AV_LOG_ERROR,"Unknown Cook version, report sample!\n"); - return -1; - break; - } + av_log_ask_for_sample(avctx, "Unknown Cook version.\n"); + return AVERROR_PATCHWELCOME; + } + + if (s > 1 && q->subpacket[s].samples_per_channel != q->samples_per_channel) { + av_log(avctx, AV_LOG_ERROR, "different number of samples per channel!\n"); + return AVERROR_INVALIDDATA; + } else + q->samples_per_channel = q->subpacket[0].samples_per_channel; + + + /* Initialize variable relations */ + q->subpacket[s].numvector_size = (1 << q->subpacket[s].log2_numvector_size); + + /* Try to catch some obviously faulty streams, othervise it might be exploitable */ + if (q->subpacket[s].total_subbands > 53) { + av_log_ask_for_sample(avctx, "total_subbands > 53\n"); + return AVERROR_PATCHWELCOME; + } - /* Initialize variable relations */ - q->mlt_size = q->samples_per_channel; - q->numvector_size = (1 << q->log2_numvector_size); + if ((q->subpacket[s].js_vlc_bits > 6) || + (q->subpacket[s].js_vlc_bits < 2 * q->subpacket[s].joint_stereo)) { + av_log(avctx, AV_LOG_ERROR, "js_vlc_bits = %d, only >= %d and <= 6 allowed!\n", + q->subpacket[s].js_vlc_bits, 2 * q->subpacket[s].joint_stereo); + return AVERROR_INVALIDDATA; + } + if (q->subpacket[s].subbands > 50) { + av_log_ask_for_sample(avctx, "subbands > 50\n"); + return AVERROR_PATCHWELCOME; + } + q->subpacket[s].gains1.now = q->subpacket[s].gain_1; + q->subpacket[s].gains1.previous = q->subpacket[s].gain_2; + q->subpacket[s].gains2.now = q->subpacket[s].gain_3; + q->subpacket[s].gains2.previous = q->subpacket[s].gain_4; + + q->num_subpackets++; + s++; + if (s > MAX_SUBPACKETS) { + av_log_ask_for_sample(avctx, "Too many subpackets > 5\n"); + return AVERROR_PATCHWELCOME; + } + } /* Generate tables */ - init_rootpow2table(q); - init_pow2table(q); + init_pow2table(); init_gain_table(q); + init_cplscales_table(q); - if (init_cook_vlc_tables(q) != 0) - return -1; + if ((ret = init_cook_vlc_tables(q))) + return ret; - if(avctx->block_align >= UINT_MAX/2) - return -1; + if (avctx->block_align >= UINT_MAX / 2) + return AVERROR(EINVAL); /* Pad the databuffer with: DECODE_BYTES_PAD1 or DECODE_BYTES_PAD2 for decode_bytes(), FF_INPUT_BUFFER_PADDING_SIZE, for the bitstreamreader. */ - if (q->nb_channels==2 && q->joint_stereo==0) { - q->decoded_bytes_buffer = - av_mallocz(avctx->block_align/2 - + DECODE_BYTES_PAD2(avctx->block_align/2) - + FF_INPUT_BUFFER_PADDING_SIZE); - } else { - q->decoded_bytes_buffer = - av_mallocz(avctx->block_align - + DECODE_BYTES_PAD1(avctx->block_align) - + FF_INPUT_BUFFER_PADDING_SIZE); - } + q->decoded_bytes_buffer = + av_mallocz(avctx->block_align + + DECODE_BYTES_PAD1(avctx->block_align) + + FF_INPUT_BUFFER_PADDING_SIZE); if (q->decoded_bytes_buffer == NULL) - return -1; - - q->gain_ptr1[0] = &q->gain_1; - q->gain_ptr1[1] = &q->gain_2; - q->gain_ptr2[0] = &q->gain_3; - q->gain_ptr2[1] = &q->gain_4; + return AVERROR(ENOMEM); /* Initialize transform. */ - if ( init_cook_mlt(q) == 0 ) - return -1; + if ((ret = init_cook_mlt(q))) + return ret; + + /* Initialize COOK signal arithmetic handling */ + if (1) { + q->scalar_dequant = scalar_dequant_float; + q->decouple = decouple_float; + q->imlt_window = imlt_window_float; + q->interpolate = interpolate_float; + q->saturate_output = saturate_output_float; + } /* Try to catch some obviously faulty streams, othervise it might be exploitable */ - if (q->total_subbands > 53) { - av_log(avctx,AV_LOG_ERROR,"total_subbands > 53, report sample!\n"); - return -1; - } - if (q->subbands > 50) { - av_log(avctx,AV_LOG_ERROR,"subbands > 50, report sample!\n"); - return -1; - } - if ((q->samples_per_channel == 256) || (q->samples_per_channel == 512) || (q->samples_per_channel == 1024)) { - } else { - av_log(avctx,AV_LOG_ERROR,"unknown amount of samples_per_channel = %d, report sample!\n",q->samples_per_channel); - return -1; - } - if ((q->js_vlc_bits > 6) || (q->js_vlc_bits < 0)) { - av_log(avctx,AV_LOG_ERROR,"q->js_vlc_bits = %d, only >= 0 and <= 6 allowed!\n",q->js_vlc_bits); - return -1; + if (q->samples_per_channel != 256 && q->samples_per_channel != 512 && + q->samples_per_channel != 1024) { + av_log_ask_for_sample(avctx, + "unknown amount of samples_per_channel = %d\n", + q->samples_per_channel); + return AVERROR_PATCHWELCOME; } -#ifdef COOKDEBUG + avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; + if (channel_mask) + avctx->channel_layout = channel_mask; + else + avctx->channel_layout = (avctx->channels == 2) ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO; + + avcodec_get_frame_defaults(&q->frame); + avctx->coded_frame = &q->frame; + +#ifdef DEBUG dump_cook_context(q); #endif return 0; } - -AVCodec cook_decoder = -{ - .name = "cook", - .type = CODEC_TYPE_AUDIO, - .id = CODEC_ID_COOK, +AVCodec ff_cook_decoder = { + .name = "cook", + .type = AVMEDIA_TYPE_AUDIO, + .id = AV_CODEC_ID_COOK, .priv_data_size = sizeof(COOKContext), - .init = cook_decode_init, - .close = cook_decode_close, - .decode = cook_decode_frame, + .init = cook_decode_init, + .close = cook_decode_close, + .decode = cook_decode_frame, + .capabilities = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("Cook / Cooker / Gecko (RealAudio G2)"), + .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, + AV_SAMPLE_FMT_NONE }, };