From 4a291c90fe7f51eb32742a4a04cdaf144521334a Mon Sep 17 00:00:00 2001 From: Benjamin Larsson Date: Sat, 25 Apr 2009 10:20:48 +0000 Subject: [PATCH] Factor out COOKSubpacket, in preparation for multichannel support. Originally committed as revision 18683 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/cook.c | 421 ++++++++++++++++++++++++++-------------------- 1 file changed, 234 insertions(+), 187 deletions(-) diff --git a/libavcodec/cook.c b/libavcodec/cook.c index b8f74551eb..59d3ef23f9 100644 --- a/libavcodec/cook.c +++ b/libavcodec/cook.c @@ -70,6 +70,36 @@ typedef struct { int *previous; } cook_gains; +typedef struct { + int ch_idx; + int size; + int num_channels; + int cookversion; + int samples_per_frame; + int subbands; + int js_subband_start; + int js_vlc_bits; + int samples_per_channel; + int log2_numvector_size; + unsigned int channel_mask; + VLC ccpl; ///< 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]; + /** gain buffers */ + 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 @@ -80,6 +110,7 @@ typedef struct cook { float* mlt_p); void (* decouple) (struct cook *q, + COOKSubpacket *p, int subband, float f1, float f2, float *decode_buffer, @@ -97,19 +128,10 @@ typedef struct cook { 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 subbands; - int log2_numvector_size; - int numvector_size; //1 << log2_numvector_size; - int js_subband_start; - int total_subbands; int num_vectors; - int bits_per_subpacket; - int cookversion; + int samples_per_channel; /* states */ AVLFG random_state; @@ -117,19 +139,9 @@ typedef struct cook { MDCTContext mdct_ctx; float* mlt_window; - /* gain buffers */ - cook_gains gains1; - cook_gains gains2; - int gain_1[9]; - int gain_2[9]; - int gain_3[9]; - int gain_4[9]; - /* VLC data */ - int js_vlc_bits; VLC envelope_quant_index[13]; VLC sqvh[7]; //scalar quantization - VLC ccpl; //channel coupling /* generatable tables and related variables */ int gain_size_factor; @@ -139,13 +151,13 @@ typedef struct cook { uint8_t* decoded_bytes_buffer; DECLARE_ALIGNED_16(float,mono_mdct_output[2048]); - float mono_previous_buffer1[1024]; - float mono_previous_buffer2[1024]; float decode_buffer_1[1024]; float decode_buffer_2[1024]; float decode_buffer_0[1060]; /* static allocation for joint decode */ const float *cplscales[5]; + int num_subpackets; + COOKSubpacket subpacket[MAX_SUBPACKETS]; } COOKContext; static float pow2tab[127]; @@ -221,11 +233,13 @@ static av_cold int init_cook_vlc_tables(COOKContext *q) { 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(q->avctx,AV_LOG_DEBUG,"Joint-stereo VLC used.\n"); + for(i=0;inum_subpackets;i++){ + if (q->subpacket[i].joint_stereo==1){ + result |= init_vlc (&q->subpacket[i].ccpl, 6, (1<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(q->avctx,AV_LOG_DEBUG,"VLC tables initialized.\n"); @@ -337,8 +351,8 @@ static av_cold int cook_decode_close(AVCodecContext *avctx) 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 ; inum_subpackets ; i++) { + free_vlc(&q->subpacket[i].ccpl); } av_log(avctx,AV_LOG_DEBUG,"Memory deallocated.\n"); @@ -377,15 +391,15 @@ static void decode_gain_info(GetBitContext *gb, int *gaininfo) * @param quant_index_table pointer to the array */ -static void decode_envelope(COOKContext *q, int* quant_index_table) { +static void decode_envelope(COOKContext *q, COOKSubpacket *p, int* quant_index_table) { int i,j, vlc_index; quant_index_table[0]= get_bits(&q->gb,6) - 6; //This is used later in categorize - for (i=1 ; i < q->total_subbands ; i++){ + for (i=1 ; i < p->total_subbands ; i++){ vlc_index=i; - if (i >= q->js_subband_start * 2) { - vlc_index-=q->js_subband_start; + if (i >= p->js_subband_start * 2) { + vlc_index-=p->js_subband_start; } else { vlc_index/=2; if(vlc_index < 1) vlc_index = 1; @@ -407,17 +421,17 @@ static void decode_envelope(COOKContext *q, int* quant_index_table) { * @param category_index pointer to the category_index array */ -static void categorize(COOKContext *q, int* quant_index_table, +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]; int exp_index1[102]; int tmp_categorize_array[128*2]; - int tmp_categorize_array1_idx=q->numvector_size; - int tmp_categorize_array2_idx=q->numvector_size; + 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) { bits_left = q->samples_per_channel + @@ -435,7 +449,7 @@ static void categorize(COOKContext *q, int* quant_index_table, for (i=32 ; i>0 ; i=i/2){ num_bits = 0; index = 0; - for (j=q->total_subbands ; j>0 ; j--){ + 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]; @@ -447,7 +461,7 @@ static void categorize(COOKContext *q, int* quant_index_table, /* Calculate total number of bits. */ num_bits=0; - for (i=0 ; itotal_subbands ; i++) { + for (i=0 ; itotal_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; @@ -455,11 +469,11 @@ static void categorize(COOKContext *q, int* quant_index_table, } tmpbias1 = tmpbias2 = num_bits; - for (j = 1 ; j < q->numvector_size ; j++) { + 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++){ + for (i=0 ; itotal_subbands ; i++){ if (exp_index1[i] < 7) { v = (-2*exp_index1[i]) - quant_index_table[i] + bias; if ( v >= max) { @@ -476,7 +490,7 @@ static void categorize(COOKContext *q, int* quant_index_table, } else { /* <--- */ int min = 999999; index=-1; - for (i=0 ; itotal_subbands ; i++){ + for (i=0 ; itotal_subbands ; i++){ if(exp_index2[i] > 0){ v = (-2*exp_index2[i])-quant_index_table[i]+bias; if ( v < min) { @@ -493,10 +507,10 @@ static void categorize(COOKContext *q, int* quant_index_table, } } - for(i=0 ; itotal_subbands ; i++) + for(i=0 ; itotal_subbands ; i++) category[i] = exp_index2[i]; - for(i=0 ; inumvector_size-1 ; i++) + for(i=0 ; inumvector_size-1 ; i++) category_index[i] = tmp_categorize_array[tmp_categorize_array2_idx++]; } @@ -556,7 +570,7 @@ static void scalar_dequant_float(COOKContext *q, int index, int quant_index, * @param subband_coef_sign signs of coefficients */ -static int unpack_SQVH(COOKContext *q, int category, int* subband_coef_index, +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; @@ -565,7 +579,7 @@ static int unpack_SQVH(COOKContext *q, int category, int* subband_coef_index, result = 0; for(i=0 ; igb, q->sqvh[category].table, q->sqvh[category].bits, 3); - if (q->bits_per_subpacket < get_bits_count(&q->gb)){ + if (p->bits_per_subpacket < get_bits_count(&q->gb)){ vlc = 0; result = 1; } @@ -576,7 +590,7 @@ static int unpack_SQVH(COOKContext *q, int category, int* subband_coef_index, } for(j=0 ; jgb) < q->bits_per_subpacket){ + if(get_bits_count(&q->gb) < p->bits_per_subpacket){ subband_coef_sign[i*vd+j] = get_bits1(&q->gb); } else { result=1; @@ -601,7 +615,7 @@ static int unpack_SQVH(COOKContext *q, int category, int* subband_coef_index, */ -static void decode_vectors(COOKContext* q, int* category, +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. */ @@ -612,12 +626,12 @@ static void decode_vectors(COOKContext* q, int* category, int band, j; int index=0; - for(band=0 ; bandtotal_subbands ; band++){ + for(band=0 ; bandtotal_subbands ; band++){ index = category[band]; if(category[band] < 7){ - if(unpack_SQVH(q, category[band], subband_coef_index, subband_coef_sign)){ + if(unpack_SQVH(q, p, category[band], subband_coef_index, subband_coef_sign)){ index=7; - for(j=0 ; jtotal_subbands ; j++) category[band+j]=7; + for(j=0 ; jtotal_subbands ; j++) category[band+j]=7; } } if(index>=7) { @@ -629,7 +643,7 @@ static void decode_vectors(COOKContext* q, int* category, &mlt_buffer[band * SUBBAND_SIZE]); } - if(q->total_subbands*SUBBAND_SIZE >= q->samples_per_channel){ + if(p->total_subbands*SUBBAND_SIZE >= q->samples_per_channel){ return; } /* FIXME: should this be removed, or moved into loop above? */ } @@ -642,7 +656,7 @@ static void decode_vectors(COOKContext* q, int* category, * @param mlt_buffer pointer to mlt coefficients */ -static void mono_decode(COOKContext *q, float* mlt_buffer) { +static void mono_decode(COOKContext *q, COOKSubpacket *p, float* mlt_buffer) { int category_index[128]; int quant_index_table[102]; @@ -651,11 +665,11 @@ static void mono_decode(COOKContext *q, float* mlt_buffer) { memset(&category, 0, 128*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); - categorize(q, quant_index_table, category, category_index); + decode_envelope(q, p, quant_index_table); + 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_index_table, mlt_buffer); + decode_vectors(q, p, category, quant_index_table, mlt_buffer); } @@ -760,24 +774,24 @@ static void imlt_gain(COOKContext *q, float *inbuffer, * */ -static void decouple_info(COOKContext *q, int* decouple_tab){ +static void decouple_info(COOKContext *q, COOKSubpacket *p, int* decouple_tab){ int length, i; if(get_bits1(&q->gb)) { - if(cplband[q->js_subband_start] > cplband[q->subbands-1]) return; + if(cplband[p->js_subband_start] > cplband[p->subbands-1]) return; - length = cplband[q->subbands-1] - cplband[q->js_subband_start] + 1; + length = cplband[p->subbands-1] - cplband[p->js_subband_start] + 1; for (i=0 ; ijs_subband_start] + i] = get_vlc2(&q->gb, q->ccpl.table, q->ccpl.bits, 2); + decouple_tab[cplband[p->js_subband_start] + i] = get_vlc2(&q->gb, p->ccpl.table, p->ccpl.bits, 2); } return; } - if(cplband[q->js_subband_start] > cplband[q->subbands-1]) return; + if(cplband[p->js_subband_start] > cplband[p->subbands-1]) return; - length = cplband[q->subbands-1] - cplband[q->js_subband_start] + 1; + length = cplband[p->subbands-1] - cplband[p->js_subband_start] + 1; for (i=0 ; ijs_subband_start] + i] = get_bits(&q->gb, q->js_vlc_bits); + decouple_tab[cplband[p->js_subband_start] + i] = get_bits(&q->gb, p->js_vlc_bits); } return; } @@ -794,6 +808,7 @@ static void decouple_info(COOKContext *q, int* decouple_tab){ * @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, @@ -801,7 +816,7 @@ static void decouple_float (COOKContext *q, { int j, tmp_idx; for (j=0 ; jjs_subband_start + subband)*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]; } @@ -815,7 +830,7 @@ static void decouple_float (COOKContext *q, * @param mlt_buffer2 pointer to right channel mlt coefficients */ -static void joint_decode(COOKContext *q, float* mlt_buffer1, +static void joint_decode(COOKContext *q, COOKSubpacket *p, float* mlt_buffer1, float* mlt_buffer2) { int i,j; int decouple_tab[SUBBAND_SIZE]; @@ -830,11 +845,11 @@ static void joint_decode(COOKContext *q, float* mlt_buffer1, /* 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); + decouple_info(q, p, decouple_tab); + mono_decode(q, p, decode_buffer); /* The two channels are stored interleaved in decode_buffer. */ - for (i=0 ; ijs_subband_start ; i++) { + for (i=0 ; ijs_subband_start ; i++) { for (j=0 ; jjs_vlc_bits) - 1; - for (i=q->js_subband_start ; isubbands ; i++) { + idx = (1 << p->js_vlc_bits) - 1; + for (i=p->js_subband_start ; isubbands ; i++) { cpl_tmp = cplband[i]; idx -=decouple_tab[cpl_tmp]; - cplscale = q->cplscales[q->js_vlc_bits-2]; //choose decoupler table + cplscale = q->cplscales[p->js_vlc_bits-2]; //choose decoupler table f1 = cplscale[decouple_tab[cpl_tmp]]; f2 = cplscale[idx-1]; - q->decouple (q, i, f1, f2, decode_buffer, mlt_buffer1, mlt_buffer2); - idx = (1 << q->js_vlc_bits) - 1; + q->decouple (q, p, i, f1, f2, decode_buffer, mlt_buffer1, mlt_buffer2); + idx = (1 << p->js_vlc_bits) - 1; } } @@ -865,15 +880,15 @@ static void joint_decode(COOKContext *q, float* mlt_buffer1, */ static inline void -decode_bytes_and_gain(COOKContext *q, const uint8_t *inbuffer, +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); + p->bits_per_subpacket); decode_gain_info(&q->gb, gains_ptr->now); /* Swap current and previous gains */ @@ -934,40 +949,40 @@ mlt_compensate_output(COOKContext *q, float *decode_buffer, */ -static int decode_subpacket(COOKContext *q, const uint8_t *inbuffer, - int sub_packet_size, int16_t *outbuffer) { +static void decode_subpacket(COOKContext *q, COOKSubpacket* p, const uint8_t *inbuffer, int16_t *outbuffer) { + int sub_packet_size = p->size; /* packet dump */ // for (i=0 ; iavctx, AV_LOG_ERROR, "%02x", inbuffer[i]); // } // av_log(q->avctx, AV_LOG_ERROR, "\n"); + memset(q->decode_buffer_1,0,sizeof(q->decode_buffer_1)); + decode_bytes_and_gain(q, p, inbuffer, &p->gains1); - decode_bytes_and_gain(q, inbuffer, &q->gains1); - - if (q->joint_stereo) { - joint_decode(q, q->decode_buffer_1, q->decode_buffer_2); + if (p->joint_stereo) { + joint_decode(q, p, q->decode_buffer_1, q->decode_buffer_2); } else { - mono_decode(q, q->decode_buffer_1); + mono_decode(q, p, q->decode_buffer_1); - if (q->nb_channels == 2) { - decode_bytes_and_gain(q, inbuffer + sub_packet_size/2, &q->gains2); - 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); + mono_decode(q, p, q->decode_buffer_2); } } - mlt_compensate_output(q, q->decode_buffer_1, &q->gains1, - q->mono_previous_buffer1, outbuffer, 0); + mlt_compensate_output(q, q->decode_buffer_1, &p->gains1, + p->mono_previous_buffer1, outbuffer, p->ch_idx); + + if (p->num_channels == 2) { + if (p->joint_stereo) { + mlt_compensate_output(q, q->decode_buffer_2, &p->gains1, + p->mono_previous_buffer2, outbuffer, p->ch_idx + 1); + } else { + mlt_compensate_output(q, q->decode_buffer_2, &p->gains2, + p->mono_previous_buffer2, outbuffer, p->ch_idx + 1); + } + } - if (q->nb_channels == 2) { - if (q->joint_stereo) { - mlt_compensate_output(q, q->decode_buffer_2, &q->gains1, - q->mono_previous_buffer2, outbuffer, 1); - } else { - mlt_compensate_output(q, q->decode_buffer_2, &q->gains2, - q->mono_previous_buffer2, outbuffer, 1); - } - } - return q->samples_per_frame * sizeof(int16_t); } @@ -983,11 +998,28 @@ static int cook_decode_frame(AVCodecContext *avctx, const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; COOKContext *q = avctx->priv_data; + int i; + 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); + /* estimate subpacket sizes */ + q->subpacket[0].size = avctx->block_align; + + /* decode supbackets */ + *data_size = 0; + for(i=0;inum_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); + decode_subpacket(q, &q->subpacket[i], buf + offset, (int16_t*)data); + 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)); + } + *data_size = sizeof(int16_t) * q->nb_channels * q->samples_per_channel; /* Discard the first two frames: no valid audio. */ if (avctx->frame_number < 2) *data_size = 0; @@ -1041,27 +1073,17 @@ static av_cold int cook_decode_init(AVCodecContext *avctx) { COOKContext *q = avctx->priv_data; 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; q->avctx = avctx; /* Take care of the codec specific extradata. */ - if (avctx->extradata_size <= 0) { + if (extradata_size <= 0) { av_log(avctx,AV_LOG_ERROR,"Necessary extradata missing!\n"); return -1; - } else { - /* 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 (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); - } } + av_log(avctx,AV_LOG_DEBUG,"codecdata_length=%d\n",avctx->extradata_size); /* Take data from the AVCodecContext (RM container). */ q->sample_rate = avctx->sample_rate; @@ -1071,61 +1093,110 @@ static av_cold int cook_decode_init(AVCodecContext *avctx) /* Initialize RNG. */ av_lfg_init(&q->random_state, ff_random_get_seed()); - /* Initialize extradata related variables. */ - q->samples_per_channel = q->samples_per_frame / q->nb_channels; - q->bits_per_subpacket = avctx->block_align * 8; + 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. */ + if (extradata_size >= 8){ + q->subpacket[s].cookversion = bytestream_get_be32(&edata_ptr); + q->subpacket[s].samples_per_frame = bytestream_get_be16(&edata_ptr); + q->subpacket[s].subbands = bytestream_get_be16(&edata_ptr); + extradata_size -= 8; + } + if (avctx->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; + } - /* Initialize default data states. */ - q->log2_numvector_size = 5; - q->total_subbands = q->subbands; + /* Initialize extradata related variables. */ + q->subpacket[s].samples_per_channel = q->subpacket[s].samples_per_frame / q->nb_channels; + q->subpacket[s].bits_per_subpacket = avctx->block_align * 8; - /* Initialize version-dependent variables */ - av_log(avctx,AV_LOG_DEBUG,"q->cookversion=%x\n",q->cookversion); - q->joint_stereo = 0; - switch (q->cookversion) { - case MONO: - if (q->nb_channels != 1) { - av_log(avctx,AV_LOG_ERROR,"Container channels != 1, report sample!\n"); + /* 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 version-dependent variables */ + + 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; + } + av_log(avctx,AV_LOG_DEBUG,"MONO\n"); + break; + case STEREO: + if (q->nb_channels != 1) + q->subpacket[s].bits_per_subpdiv = 1; + q->subpacket[s].num_channels = 2; + 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; + } + 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->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; + } + break; + case MC_COOK: + av_log(avctx,AV_LOG_ERROR,"MC_COOK not supported!\n"); return -1; - } - 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; - } - 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"); + break; + default: + av_log(avctx,AV_LOG_ERROR,"Unknown Cook version, report sample!\n"); return -1; - } - 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; - } - if (q->samples_per_channel > 256) { - q->log2_numvector_size = 6; - } - if (q->samples_per_channel > 512) { - q->log2_numvector_size = 7; - } - break; - case MC_COOK: - av_log(avctx,AV_LOG_ERROR,"MC_COOK not supported!\n"); + break; + } + + 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 -1; - break; - default: - av_log(avctx,AV_LOG_ERROR,"Unknown Cook version, report sample!\n"); + } 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(avctx,AV_LOG_ERROR,"total_subbands > 53, report sample!\n"); return -1; - break; + } + + if ((q->subpacket[s].js_vlc_bits > 6) || (q->subpacket[s].js_vlc_bits < 0)) { + av_log(avctx,AV_LOG_ERROR,"js_vlc_bits = %d, only >= 0 and <= 6 allowed!\n",q->subpacket[s].js_vlc_bits); + return -1; + } + + if (q->subpacket[s].subbands > 50) { + av_log(avctx,AV_LOG_ERROR,"subbands > 50, report sample!\n"); + return -1; + } + 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++; } - - /* Initialize variable relations */ - q->numvector_size = (1 << q->log2_numvector_size); - /* Generate tables */ init_pow2table(); init_gain_table(q); @@ -1141,25 +1212,13 @@ static av_cold int cook_decode_init(AVCodecContext *avctx) /* 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); - } if (q->decoded_bytes_buffer == NULL) return -1; - q->gains1.now = q->gain_1; - q->gains1.previous = q->gain_2; - q->gains2.now = q->gain_3; - q->gains2.previous = q->gain_4; - /* Initialize transform. */ if ( init_cook_mlt(q) != 0 ) return -1; @@ -1174,23 +1233,11 @@ static av_cold int cook_decode_init(AVCodecContext *avctx) } /* 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; - } avctx->sample_fmt = SAMPLE_FMT_S16; avctx->channel_layout = (avctx->channels==2) ? CH_LAYOUT_STEREO : CH_LAYOUT_MONO;