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author	Nils Wallménius <nils@rockbox.org>	2009-10-08 19:26:07 +0000
committer	Nils Wallménius <nils@rockbox.org>	2009-10-08 19:26:07 +0000
commit	4f914fdd28453aedd40e9dd94aa2f31a76ffd81b (patch)
tree	c4627e8b9e610bf9167a20bbec33e997d7a3431a /apps/plugins
parent	db44178a3f01851dd45dc190b9d738cd49ae373d (diff)
download	rockbox-4f914fdd28453aedd40e9dd94aa2f31a76ffd81b.zip rockbox-4f914fdd28453aedd40e9dd94aa2f31a76ffd81b.tar.gz rockbox-4f914fdd28453aedd40e9dd94aa2f31a76ffd81b.tar.bz2 rockbox-4f914fdd28453aedd40e9dd94aa2f31a76ffd81b.tar.xz

FS#10661 by Seth Opgenorth, adding more levels to brickmania

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23012 a1c6a512-1295-4272-9138-f99709370657

Diffstat (limited to 'apps/plugins')

-rw-r--r--

apps/plugins/brickmania.c

138

1 files changed, 129 insertions, 9 deletions

/* ** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding ** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com ** ** This program is free software; you can redistribute it and/or modify ** it under the terms of the GNU General Public License as published by ** the Free Software Foundation; either version 2 of the License, or ** (at your option) any later version. ** ** This program 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 General Public License for more details. ** ** You should have received a copy of the GNU General Public License ** along with this program; if not, write to the Free Software ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. ** ** Any non-GPL usage of this software or parts of this software is strictly ** forbidden. ** ** Commercial non-GPL licensing of this software is possible. ** For more info contact Ahead Software through Mpeg4AAClicense@nero.com. ** ** $Id$ **/ #include "common.h" #include "structs.h" #ifdef SBR_DEC #include "sbr_syntax.h" #include "syntax.h" #include "sbr_huff.h" #include "sbr_fbt.h" #include "sbr_tf_grid.h" #include "sbr_e_nf.h" #include "bits.h" #ifdef PS_DEC #include "ps_dec.h" #endif #ifdef DRM_PS #include "drm_dec.h" #endif #include "analysis.h" /* static function declarations */ static void sbr_header(bitfile *ld, sbr_info *sbr); static uint8_t calc_sbr_tables(sbr_info *sbr, uint8_t start_freq, uint8_t stop_freq, uint8_t samplerate_mode, uint8_t freq_scale, uint8_t alter_scale, uint8_t xover_band); static uint8_t sbr_data(bitfile *ld, sbr_info *sbr); static uint16_t sbr_extension(bitfile *ld, sbr_info *sbr, uint8_t bs_extension_id, uint16_t num_bits_left); static uint8_t sbr_single_channel_element(bitfile *ld, sbr_info *sbr); static uint8_t sbr_channel_pair_element(bitfile *ld, sbr_info *sbr); static uint8_t sbr_grid(bitfile *ld, sbr_info *sbr, uint8_t ch); static void sbr_dtdf(bitfile *ld, sbr_info *sbr, uint8_t ch); static void invf_mode(bitfile *ld, sbr_info *sbr, uint8_t ch); static void sinusoidal_coding(bitfile *ld, sbr_info *sbr, uint8_t ch); static void sbr_reset(sbr_info *sbr) { #if 0 printf("%d\n", sbr->bs_start_freq_prev); printf("%d\n", sbr->bs_stop_freq_prev); printf("%d\n", sbr->bs_freq_scale_prev); printf("%d\n", sbr->bs_alter_scale_prev); printf("%d\n", sbr->bs_xover_band_prev); printf("%d\n\n", sbr->bs_noise_bands_prev); #endif /* if these are different from the previous frame: Reset = 1 */ if ((sbr->bs_start_freq != sbr->bs_start_freq_prev) || (sbr->bs_stop_freq != sbr->bs_stop_freq_prev) || (sbr->bs_freq_scale != sbr->bs_freq_scale_prev) || (sbr->bs_alter_scale != sbr->bs_alter_scale_prev) || (sbr->bs_xover_band != sbr->bs_xover_band_prev) || (sbr->bs_noise_bands != sbr->bs_noise_bands_prev)) { sbr->Reset = 1; } else { sbr->Reset = 0; } sbr->bs_start_freq_prev = sbr->bs_start_freq; sbr->bs_stop_freq_prev = sbr->bs_stop_freq; sbr->bs_freq_scale_prev = sbr->bs_freq_scale; sbr->bs_alter_scale_prev = sbr->bs_alter_scale; sbr->bs_xover_band_prev = sbr->bs_xover_band; sbr->bs_noise_bands_prev = sbr->bs_noise_bands; } static uint8_t calc_sbr_tables(sbr_info *sbr, uint8_t start_freq, uint8_t stop_freq, uint8_t samplerate_mode, uint8_t freq_scale, uint8_t alter_scale, uint8_t xover_band) { uint8_t result = 0; uint8_t k2; /* calculate the Master Frequency Table */ sbr->k0 = qmf_start_channel(start_freq, samplerate_mode, sbr->sample_rate); k2 = qmf_stop_channel(stop_freq, sbr->sample_rate, sbr->k0); /* check k0 and k2 */ if (sbr->sample_rate >= 48000) { if ((k2 - sbr->k0) > 32) result += 1; } else if (sbr->sample_rate <= 32000) { if ((k2 - sbr->k0) > 48) result += 1; } else { /* (sbr->sample_rate == 44100) */ if ((k2 - sbr->k0) > 45) result += 1; } if (freq_scale == 0) { result += master_frequency_table_fs0(sbr, sbr->k0, k2, alter_scale); } else { result += master_frequency_table(sbr, sbr->k0, k2, freq_scale, alter_scale); } result += derived_frequency_table(sbr, xover_band, k2); result = (result > 0) ? 1 : 0; return result; } /* table 2 */ uint8_t sbr_extension_data(bitfile *ld, sbr_info *sbr, uint16_t cnt) { uint8_t result = 0; uint16_t num_align_bits = 0; uint16_t num_sbr_bits = (uint16_t)faad_get_processed_bits(ld); uint8_t saved_start_freq, saved_samplerate_mode; uint8_t saved_stop_freq, saved_freq_scale; uint8_t saved_alter_scale, saved_xover_band; #ifdef DRM if (!sbr->Is_DRM_SBR) #endif { uint8_t bs_extension_type = (uint8_t)faad_getbits(ld, 4 DEBUGVAR(1,198,"sbr_bitstream(): bs_extension_type")); if (bs_extension_type == EXT_SBR_DATA_CRC) { sbr->bs_sbr_crc_bits = (uint16_t)faad_getbits(ld, 10 DEBUGVAR(1,199,"sbr_bitstream(): bs_sbr_crc_bits")); } } /* save old header values, in case the new ones are corrupted */ saved_start_freq = sbr->bs_start_freq; saved_samplerate_mode = sbr->bs_samplerate_mode; saved_stop_freq = sbr->bs_stop_freq; saved_freq_scale = sbr->bs_freq_scale; saved_alter_scale = sbr->bs_alter_scale; saved_xover_band = sbr->bs_xover_band; sbr->bs_header_flag = faad_get1bit(ld DEBUGVAR(1,200,"sbr_bitstream(): bs_header_flag")); if (sbr->bs_header_flag) sbr_header(ld, sbr); /* Reset? */ sbr_reset(sbr); /* first frame should have a header */ //if (!(sbr->frame == 0 && sbr->bs_header_flag == 0)) if (sbr->header_count != 0) { if (sbr->Reset || (sbr->bs_header_flag && sbr->just_seeked)) { uint8_t rt = calc_sbr_tables(sbr, sbr->bs_start_freq, sbr->bs_stop_freq, sbr->bs_samplerate_mode, sbr->bs_freq_scale, sbr->bs_alter_scale, sbr->bs_xover_band); /* if an error occured with the new header values revert to the old ones */ if (rt > 0) { calc_sbr_tables(sbr, saved_start_freq, saved_stop_freq, saved_samplerate_mode, saved_freq_scale, saved_alter_scale, saved_xover_band); } } if (result == 0) { result = sbr_data(ld, sbr); /* sbr_data() returning an error means that there was an error in envelope_time_border_vector(). In this case the old time border vector is saved and all the previous data normally read after sbr_grid() is saved. */ /* to be on the safe side, calculate old sbr tables in case of error */ if ((result > 0) && (sbr->Reset || (sbr->bs_header_flag && sbr->just_seeked))) { calc_sbr_tables(sbr, saved_start_freq, saved_stop_freq, saved_samplerate_mode, saved_freq_scale, saved_alter_scale, saved_xover_band); } /* we should be able to safely set result to 0 now */ result = 0; } } else { result = 1; } #ifdef DRM if (!sbr->Is_DRM_SBR) #endif { num_sbr_bits = (uint16_t)faad_get_processed_bits(ld) - num_sbr_bits; /* check if we read more bits then were available for sbr */ if (8*cnt < num_sbr_bits) return 1; /* -4 does not apply, bs_extension_type is re-read in this function */ num_align_bits = 8*cnt /*- 4*/ - num_sbr_bits; while (num_align_bits > 7) { faad_getbits(ld, 8 DEBUGVAR(1,999,"sbr_bitstream(): num_align_bits")); num_align_bits -= 8; } faad_getbits(ld, num_align_bits DEBUGVAR(1,999,"sbr_bitstream(): num_align_bits")); } return result; } /* table 3 */ static void sbr_header(bitfile *ld, sbr_info *sbr) { uint8_t bs_header_extra_1, bs_header_extra_2; sbr->header_count++; sbr->bs_amp_res = faad_get1bit(ld DEBUGVAR(1,203,"sbr_header(): bs_amp_res")); /* bs_start_freq and bs_stop_freq must define a fequency band that does not exceed 48 channels */ sbr->bs_start_freq = (uint8_t)faad_getbits(ld, 4 DEBUGVAR(1,204,"sbr_header(): bs_start_freq")); sbr->bs_stop_freq = (uint8_t)faad_getbits(ld, 4 DEBUGVAR(1,205,"sbr_header(): bs_stop_freq")); sbr->bs_xover_band = (uint8_t)faad_getbits(ld, 3 DEBUGVAR(1,206,"sbr_header(): bs_xover_band")); faad_getbits(ld, 2 DEBUGVAR(1,207,"sbr_header(): bs_reserved_bits_hdr")); bs_header_extra_1 = (uint8_t)faad_get1bit(ld DEBUGVAR(1,208,"sbr_header(): bs_header_extra_1")); bs_header_extra_2 = (uint8_t)faad_get1bit(ld DEBUGVAR(1,209,"sbr_header(): bs_header_extra_2")); if (bs_header_extra_1) { sbr->bs_freq_scale = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,211,"sbr_header(): bs_freq_scale")); sbr->bs_alter_scale = (uint8_t)faad_get1bit(ld DEBUGVAR(1,212,"sbr_header(): bs_alter_scale")); sbr->bs_noise_bands = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,213,"sbr_header(): bs_noise_bands")); } else { /* Default values */ sbr->bs_freq_scale = 2; sbr->bs_alter_scale = 1; sbr->bs_noise_bands = 2; } if (bs_header_extra_2) { sbr->bs_limiter_bands = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,214,"sbr_header(): bs_limiter_bands")); sbr->bs_limiter_gains = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,215,"sbr_header(): bs_limiter_gains")); sbr->bs_interpol_freq = (uint8_t)faad_get1bit(ld DEBUGVAR(1,216,"sbr_header(): bs_interpol_freq")); sbr->bs_smoothing_mode = (uint8_t)faad_get1bit(ld DEBUGVAR(1,217,"sbr_header(): bs_smoothing_mode")); } else { /* Default values */ sbr->bs_limiter_bands = 2; sbr->bs_limiter_gains = 2; sbr->bs_interpol_freq = 1; sbr->bs_smoothing_mode = 1; } #if 0 /* print the header to screen */ printf("bs_amp_res: %d\n", sbr->bs_amp_res); printf("bs_start_freq: %d\n", sbr->bs_start_freq); printf("bs_stop_freq: %d\n", sbr->bs_stop_freq); printf("bs_xover_band: %d\n", sbr->bs_xover_band); if (bs_header_extra_1) { printf("bs_freq_scale: %d\n", sbr->bs_freq_scale); printf("bs_alter_scale: %d\n", sbr->bs_alter_scale); printf("bs_noise_bands: %d\n", sbr->bs_noise_bands); } if (bs_header_extra_2) { printf("bs_limiter_bands: %d\n", sbr->bs_limiter_bands); printf("bs_limiter_gains: %d\n", sbr->bs_limiter_gains); printf("bs_interpol_freq: %d\n", sbr->bs_interpol_freq); printf("bs_smoothing_mode: %d\n", sbr->bs_smoothing_mode); } printf("\n"); #endif } /* table 4 */ static uint8_t sbr_data(bitfile *ld, sbr_info *sbr) { uint8_t result; #if 0 sbr->bs_samplerate_mode = faad_get1bit(ld DEBUGVAR(1,219,"sbr_data(): bs_samplerate_mode")); #endif sbr->rate = (sbr->bs_samplerate_mode) ? 2 : 1; switch (sbr->id_aac) { case ID_SCE: if ((result = sbr_single_channel_element(ld, sbr)) > 0) return result; break; case ID_CPE: if ((result = sbr_channel_pair_element(ld, sbr)) > 0) return result; break; } return 0; } /* table 5 */ static uint8_t sbr_single_channel_element(bitfile *ld, sbr_info *sbr) { uint8_t result; if (faad_get1bit(ld DEBUGVAR(1,220,"sbr_single_channel_element(): bs_data_extra"))) { faad_getbits(ld, 4 DEBUGVAR(1,221,"sbr_single_channel_element(): bs_reserved_bits_data")); } #ifdef DRM /* bs_coupling, from sbr_channel_pair_base_element(bs_amp_res) */ if (sbr->Is_DRM_SBR) faad_get1bit(ld); #endif if ((result = sbr_grid(ld, sbr, 0)) > 0) return result; sbr_dtdf(ld, sbr, 0); invf_mode(ld, sbr, 0); sbr_envelope(ld, sbr, 0); sbr_noise(ld, sbr, 0); #ifndef FIXED_POINT envelope_noise_dequantisation(sbr, 0); #endif memset(sbr->bs_add_harmonic[0], 0, 64*sizeof(uint8_t)); sbr->bs_add_harmonic_flag[0] = faad_get1bit(ld DEBUGVAR(1,223,"sbr_single_channel_element(): bs_add_harmonic_flag[0]")); if (sbr->bs_add_harmonic_flag[0]) sinusoidal_coding(ld, sbr, 0); sbr->bs_extended_data = faad_get1bit(ld DEBUGVAR(1,224,"sbr_single_channel_element(): bs_extended_data[0]")); if (sbr->bs_extended_data) { uint16_t nr_bits_left; #if (defined(PS_DEC) || defined(DRM_PS)) uint8_t ps_ext_read = 0; #endif uint16_t cnt = (uint16_t)faad_getbits(ld, 4 DEBUGVAR(1,225,"sbr_single_channel_element(): bs_extension_size")); if (cnt == 15) { cnt += (uint16_t)faad_getbits(ld, 8 DEBUGVAR(1,226,"sbr_single_channel_element(): bs_esc_count")); } nr_bits_left = 8 * cnt; while (nr_bits_left > 7) { uint16_t tmp_nr_bits = 0; sbr->bs_extension_id = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,227,"sbr_single_channel_element(): bs_extension_id")); tmp_nr_bits += 2; /* allow only 1 PS extension element per extension data */ #if (defined(PS_DEC) || defined(DRM_PS)) #if (defined(PS_DEC) && defined(DRM_PS)) if (sbr->bs_extension_id == EXTENSION_ID_PS || sbr->bs_extension_id == DRM_PARAMETRIC_STEREO) #else #ifdef PS_DEC if (sbr->bs_extension_id == EXTENSION_ID_PS) #else #ifdef DRM_PS if (sbr->bs_extension_id == DRM_PARAMETRIC_STEREO) #endif #endif #endif { if (ps_ext_read == 0) { ps_ext_read = 1; } else { /* to be safe make it 3, will switch to "default" * in sbr_extension() */ sbr->bs_extension_id = 3; } } #endif tmp_nr_bits += sbr_extension(ld, sbr, sbr->bs_extension_id, nr_bits_left); /* check if the data read is bigger than the number of available bits */ if (tmp_nr_bits > nr_bits_left) return 1; nr_bits_left -= tmp_nr_bits; } /* Corrigendum */ if (nr_bits_left > 0) { faad_getbits(ld, nr_bits_left DEBUGVAR(1,280,"sbr_single_channel_element(): nr_bits_left")); } } return 0; } /* table 6 */ static uint8_t sbr_channel_pair_element(bitfile *ld, sbr_info *sbr) { uint8_t n, result; if (faad_get1bit(ld DEBUGVAR(1,228,"sbr_single_channel_element(): bs_data_extra"))) { faad_getbits(ld, 4 DEBUGVAR(1,228,"sbr_channel_pair_element(): bs_reserved_bits_data")); faad_getbits(ld, 4 DEBUGVAR(1,228,"sbr_channel_pair_element(): bs_reserved_bits_data")); } sbr->bs_coupling = faad_get1bit(ld DEBUGVAR(1,228,"sbr_channel_pair_element(): bs_coupling")); if (sbr->bs_coupling) { if ((result = sbr_grid(ld, sbr, 0)) > 0) return result; /* need to copy some data from left to right */ sbr->bs_frame_class[1] = sbr->bs_frame_class[0]; sbr->L_E[1] = sbr->L_E[0]; sbr->L_Q[1] = sbr->L_Q[0]; sbr->bs_pointer[1] = sbr->bs_pointer[0]; for (n = 0; n <= sbr->L_E[0]; n++) { sbr->t_E[1][n] = sbr->t_E[0][n]; sbr->f[1][n] = sbr->f[0][n]; } for (n = 0; n <= sbr->L_Q[0]; n++) sbr->t_Q[1][n] = sbr->t_Q[0][n]; sbr_dtdf(ld, sbr, 0); sbr_dtdf(ld, sbr, 1); invf_mode(ld, sbr, 0); /* more copying */ for (n = 0; n < sbr->N_Q; n++) sbr->bs_invf_mode[1][n] = sbr->bs_invf_mode[0][n]; sbr_envelope(ld, sbr, 0); sbr_noise(ld, sbr, 0); sbr_envelope(ld, sbr, 1); sbr_noise(ld, sbr, 1); memset(sbr->bs_add_harmonic[0], 0, 64*sizeof(uint8_t)); memset(sbr->bs_add_harmonic[1], 0, 64*sizeof(uint8_t)); sbr->bs_add_harmonic_flag[0] = faad_get1bit(ld DEBUGVAR(1,231,"sbr_channel_pair_element(): bs_add_harmonic_flag[0]")); if (sbr->bs_add_harmonic_flag[0]) sinusoidal_coding(ld, sbr, 0); sbr->bs_add_harmonic_flag[1] = faad_get1bit(ld DEBUGVAR(1,232,"sbr_channel_pair_element(): bs_add_harmonic_flag[1]")); if (sbr->bs_add_harmonic_flag[1]) sinusoidal_coding(ld, sbr, 1); } else { uint8_t saved_t_E[6] = {0}, saved_t_Q[3] = {0}; uint8_t saved_L_E = sbr->L_E[0]; uint8_t saved_L_Q = sbr->L_Q[0]; uint8_t saved_frame_class = sbr->bs_frame_class[0]; for (n = 0; n < saved_L_E; n++) saved_t_E[n] = sbr->t_E[0][n]; for (n = 0; n < saved_L_Q; n++) saved_t_Q[n] = sbr->t_Q[0][n]; if ((result = sbr_grid(ld, sbr, 0)) > 0) return result; if ((result = sbr_grid(ld, sbr, 1)) > 0) { /* restore first channel data as well */ sbr->bs_frame_class[0] = saved_frame_class; sbr->L_E[0] = saved_L_E; sbr->L_Q[0] = saved_L_Q; for (n = 0; n < 6; n++) sbr->t_E[0][n] = saved_t_E[n]; for (n = 0; n < 3; n++) sbr->t_Q[0][n] = saved_t_Q[n]; return result; } sbr_dtdf(ld, sbr, 0); sbr_dtdf(ld, sbr, 1); invf_mode(ld, sbr, 0); invf_mode(ld, sbr, 1); sbr_envelope(ld, sbr, 0); sbr_envelope(ld, sbr, 1); sbr_noise(ld, sbr, 0); sbr_noise(ld, sbr, 1); memset(sbr->bs_add_harmonic[0], 0, 64*sizeof(uint8_t)); memset(sbr->bs_add_harmonic[1], 0, 64*sizeof(uint8_t)); sbr->bs_add_harmonic_flag[0] = faad_get1bit(ld DEBUGVAR(1,239,"sbr_channel_pair_element(): bs_add_harmonic_flag[0]")); if (sbr->bs_add_harmonic_flag[0]) sinusoidal_coding(ld, sbr, 0); sbr->bs_add_harmonic_flag[1] = faad_get1bit(ld DEBUGVAR(1,240,"sbr_channel_pair_element(): bs_add_harmonic_flag[1]")); if (sbr->bs_add_harmonic_flag[1]) sinusoidal_coding(ld, sbr, 1); } #ifndef FIXED_POINT envelope_noise_dequantisation(sbr, 0); envelope_noise_dequantisation(sbr, 1); if (sbr->bs_coupling) unmap_envelope_noise(sbr); #endif sbr->bs_extended_data = faad_get1bit(ld DEBUGVAR(1,233,"sbr_channel_pair_element(): bs_extended_data[0]")); if (sbr->bs_extended_data) { uint16_t nr_bits_left; uint16_t cnt = (uint16_t)faad_getbits(ld, 4 DEBUGVAR(1,234,"sbr_channel_pair_element(): bs_extension_size")); if (cnt == 15) { cnt += (uint16_t)faad_getbits(ld, 8 DEBUGVAR(1,235,"sbr_channel_pair_element(): bs_esc_count")); } nr_bits_left = 8 * cnt; while (nr_bits_left > 7) { uint16_t tmp_nr_bits = 0; sbr->bs_extension_id = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,236,"sbr_channel_pair_element(): bs_extension_id")); tmp_nr_bits += 2; tmp_nr_bits += sbr_extension(ld, sbr, sbr->bs_extension_id, nr_bits_left); /* check if the data read is bigger than the number of available bits */ if (tmp_nr_bits > nr_bits_left) return 1; nr_bits_left -= tmp_nr_bits; } /* Corrigendum */ if (nr_bits_left > 0) { faad_getbits(ld, nr_bits_left DEBUGVAR(1,280,"sbr_channel_pair_element(): nr_bits_left")); } } return 0; } /* integer log[2](x): input range [0,10) */ static int8_t sbr_log2(const int8_t val) { int8_t log2tab[] = { 0, 0, 1, 2, 2, 3, 3, 3, 3, 4 }; if (val < 10 && val >= 0) return log2tab[val]; else return 0; } /* table 7 */ static uint8_t sbr_grid(bitfile *ld, sbr_info *sbr, uint8_t ch) { uint8_t i, env, rel, result; uint8_t bs_abs_bord, bs_abs_bord_1; uint8_t bs_num_env = 0; uint8_t saved_L_E = sbr->L_E[ch]; uint8_t saved_L_Q = sbr->L_Q[ch]; uint8_t saved_frame_class = sbr->bs_frame_class[ch]; sbr->bs_frame_class[ch] = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,248,"sbr_grid(): bs_frame_class")); switch (sbr->bs_frame_class[ch]) { case FIXFIX: i = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,249,"sbr_grid(): bs_num_env_raw")); bs_num_env = min(1 << i, 5); i = (uint8_t)faad_get1bit(ld DEBUGVAR(1,250,"sbr_grid(): bs_freq_res_flag")); for (env = 0; env < bs_num_env; env++) sbr->f[ch][env] = i; sbr->abs_bord_lead[ch] = 0; sbr->abs_bord_trail[ch] = sbr->numTimeSlots; sbr->n_rel_lead[ch] = bs_num_env - 1; sbr->n_rel_trail[ch] = 0; break; case FIXVAR: bs_abs_bord = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,251,"sbr_grid(): bs_abs_bord")) + sbr->numTimeSlots; bs_num_env = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,252,"sbr_grid(): bs_num_env")) + 1; for (rel = 0; rel < bs_num_env-1; rel++) { sbr->bs_rel_bord[ch][rel] = 2 * (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,253,"sbr_grid(): bs_rel_bord")) + 2; } i = sbr_log2(bs_num_env + 1); sbr->bs_pointer[ch] = (uint8_t)faad_getbits(ld, i DEBUGVAR(1,254,"sbr_grid(): bs_pointer")); for (env = 0; env < bs_num_env; env++) { sbr->f[ch][bs_num_env - env - 1] = (uint8_t)faad_get1bit(ld DEBUGVAR(1,255,"sbr_grid(): bs_freq_res")); } sbr->abs_bord_lead[ch] = 0; sbr->abs_bord_trail[ch] = bs_abs_bord; sbr->n_rel_lead[ch] = 0; sbr->n_rel_trail[ch] = bs_num_env - 1; break; case VARFIX: bs_abs_bord = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,256,"sbr_grid(): bs_abs_bord")); bs_num_env = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,257,"sbr_grid(): bs_num_env")) + 1; for (rel = 0; rel < bs_num_env-1; rel++) { sbr->bs_rel_bord[ch][rel] = 2 * (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,258,"sbr_grid(): bs_rel_bord")) + 2; } i = sbr_log2(bs_num_env + 1); sbr->bs_pointer[ch] = (uint8_t)faad_getbits(ld, i DEBUGVAR(1,259,"sbr_grid(): bs_pointer")); for (env = 0; env < bs_num_env; env++) { sbr->f[ch][env] = (uint8_t)faad_get1bit(ld DEBUGVAR(1,260,"sbr_grid(): bs_freq_res")); } sbr->abs_bord_lead[ch] = bs_abs_bord; sbr->abs_bord_trail[ch] = sbr->numTimeSlots; sbr->n_rel_lead[ch] = bs_num_env - 1; sbr->n_rel_trail[ch] = 0; break; case VARVAR: bs_abs_bord = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,261,"sbr_grid(): bs_abs_bord_0")); bs_abs_bord_1 = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,262,"sbr_grid(): bs_abs_bord_1")) + sbr->numTimeSlots; sbr->bs_num_rel_0[ch] = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,263,"sbr_grid(): bs_num_rel_0")); sbr->bs_num_rel_1[ch] = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,264,"sbr_grid(): bs_num_rel_1")); bs_num_env = min(5, sbr->bs_num_rel_0[ch] + sbr->bs_num_rel_1[ch] + 1); for (rel = 0; rel < sbr->bs_num_rel_0[ch]; rel++) { sbr->bs_rel_bord_0[ch][rel] = 2 * (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,265,"sbr_grid(): bs_rel_bord")) + 2; } for(rel = 0; rel < sbr->bs_num_rel_1[ch]; rel++) { sbr->bs_rel_bord_1[ch][rel] = 2 * (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,266,"sbr_grid(): bs_rel_bord")) + 2; } i = sbr_log2(sbr->bs_num_rel_0[ch] + sbr->bs_num_rel_1[ch] + 2); sbr->bs_pointer[ch] = (uint8_t)faad_getbits(ld, i DEBUGVAR(1,267,"sbr_grid(): bs_pointer")); for (env = 0; env < bs_num_env; env++) { sbr->f[ch][env] = (uint8_t)faad_get1bit(ld DEBUGVAR(1,268,"sbr_grid(): bs_freq_res")); } sbr->abs_bord_lead[ch] = bs_abs_bord; sbr->abs_bord_trail[ch] = bs_abs_bord_1; sbr->n_rel_lead[ch] = sbr->bs_num_rel_0[ch]; sbr->n_rel_trail[ch] = sbr->bs_num_rel_1[ch]; break; } if (sbr->bs_frame_class[ch] == VARVAR) sbr->L_E[ch] = min(bs_num_env, 5); else sbr->L_E[ch] = min(bs_num_env, 4); if (sbr->L_E[ch] <= 0) return 1; if (sbr->L_E[ch] > 1) sbr->L_Q[ch] = 2; else sbr->L_Q[ch] = 1; /* TODO: this code can probably be integrated into the code above! */ if ((result = envelope_time_border_vector(sbr, ch)) > 0) { sbr->bs_frame_class[ch] = saved_frame_class; sbr->L_E[ch] = saved_L_E; sbr->L_Q[ch] = saved_L_Q; return result; } noise_floor_time_border_vector(sbr, ch); #if 0 for (env = 0; env < bs_num_env; env++) { printf("freq_res[ch:%d][env:%d]: %d\n", ch, env, sbr->f[ch][env]); } #endif return 0; } /* table 8 */ static void sbr_dtdf(bitfile *ld, sbr_info *sbr, uint8_t ch) { uint8_t i; for (i = 0; i < sbr->L_E[ch]; i++) { sbr->bs_df_env[ch][i] = faad_get1bit(ld DEBUGVAR(1,269,"sbr_dtdf(): bs_df_env")); } for (i = 0; i < sbr->L_Q[ch]; i++) { sbr->bs_df_noise[ch][i] = faad_get1bit(ld DEBUGVAR(1,270,"sbr_dtdf(): bs_df_noise")); } } /* table 9 */ static void invf_mode(bitfile *ld, sbr_info *sbr, uint8_t ch) { uint8_t n; for (n = 0; n < sbr->N_Q; n++) { sbr->bs_invf_mode[ch][n] = (uint8_t)faad_getbits(ld, 2 DEBUGVAR(1,271,"invf_mode(): bs_invf_mode")); } } static uint16_t sbr_extension(bitfile *ld, sbr_info *sbr, uint8_t bs_extension_id, uint16_t num_bits_left) { #ifdef PS_DEC uint8_t header; uint16_t ret; #endif (void)num_bits_left; switch (bs_extension_id) { #ifdef PS_DEC case EXTENSION_ID_PS: if (!sbr->ps) { sbr->ps = ps_init(get_sr_index(sbr->sample_rate)); } ret = ps_data(sbr->ps, ld, &header); /* enable PS if and only if: a header has been decoded */ if (sbr->ps_used == 0 && header == 1) { sbr->ps_used = 1; } return ret; #endif #ifdef DRM_PS case DRM_PARAMETRIC_STEREO: sbr->ps_used = 1; if (!sbr->drm_ps) { sbr->drm_ps = drm_ps_init(); } return drm_ps_data(sbr->drm_ps, ld); #endif default: sbr->bs_extension_data = (uint8_t)faad_getbits(ld, 6 DEBUGVAR(1,279,"sbr_single_channel_element(): bs_extension_data")); return 6; } } /* table 12 */ static void sinusoidal_coding(bitfile *ld, sbr_info *sbr, uint8_t ch) { uint8_t n; for (n = 0; n < sbr->N_high; n++) { sbr->bs_add_harmonic[ch][n] = faad_get1bit(ld DEBUGVAR(1,278,"sinusoidal_coding(): bs_add_harmonic")); } } #endif /* SBR_DEC */


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