| /* |
| * AAC Spectral Band Replication decoding functions |
| * Copyright (c) 2008-2009 Robert Swain ( rob opendot cl ) |
| * Copyright (c) 2009-2010 Alex Converse <alex.converse@gmail.com> |
| * |
| * Fixed point code |
| * Copyright (c) 2013 |
| * MIPS Technologies, Inc., California. |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * AAC Spectral Band Replication decoding functions |
| * @author Robert Swain ( rob opendot cl ) |
| * @author Stanislav Ocovaj ( stanislav.ocovaj@imgtec.com ) |
| * @author Zoran Basaric ( zoran.basaric@imgtec.com ) |
| */ |
| |
| #include "libavutil/qsort.h" |
| |
| static av_cold void aacsbr_tableinit(void) |
| { |
| int n; |
| for (n = 1; n < 320; n++) |
| sbr_qmf_window_us[320 + n] = sbr_qmf_window_us[320 - n]; |
| sbr_qmf_window_us[384] = -sbr_qmf_window_us[384]; |
| sbr_qmf_window_us[512] = -sbr_qmf_window_us[512]; |
| |
| for (n = 0; n < 320; n++) |
| sbr_qmf_window_ds[n] = sbr_qmf_window_us[2*n]; |
| } |
| |
| av_cold void AAC_RENAME(ff_aac_sbr_init)(void) |
| { |
| static const struct { |
| const void *sbr_codes, *sbr_bits; |
| const unsigned int table_size, elem_size; |
| } sbr_tmp[] = { |
| SBR_VLC_ROW(t_huffman_env_1_5dB), |
| SBR_VLC_ROW(f_huffman_env_1_5dB), |
| SBR_VLC_ROW(t_huffman_env_bal_1_5dB), |
| SBR_VLC_ROW(f_huffman_env_bal_1_5dB), |
| SBR_VLC_ROW(t_huffman_env_3_0dB), |
| SBR_VLC_ROW(f_huffman_env_3_0dB), |
| SBR_VLC_ROW(t_huffman_env_bal_3_0dB), |
| SBR_VLC_ROW(f_huffman_env_bal_3_0dB), |
| SBR_VLC_ROW(t_huffman_noise_3_0dB), |
| SBR_VLC_ROW(t_huffman_noise_bal_3_0dB), |
| }; |
| |
| // SBR VLC table initialization |
| SBR_INIT_VLC_STATIC(0, 1098); |
| SBR_INIT_VLC_STATIC(1, 1092); |
| SBR_INIT_VLC_STATIC(2, 768); |
| SBR_INIT_VLC_STATIC(3, 1026); |
| SBR_INIT_VLC_STATIC(4, 1058); |
| SBR_INIT_VLC_STATIC(5, 1052); |
| SBR_INIT_VLC_STATIC(6, 544); |
| SBR_INIT_VLC_STATIC(7, 544); |
| SBR_INIT_VLC_STATIC(8, 592); |
| SBR_INIT_VLC_STATIC(9, 512); |
| |
| aacsbr_tableinit(); |
| |
| AAC_RENAME(ff_ps_init)(); |
| } |
| |
| /** Places SBR in pure upsampling mode. */ |
| static void sbr_turnoff(SpectralBandReplication *sbr) { |
| sbr->start = 0; |
| sbr->ready_for_dequant = 0; |
| // Init defults used in pure upsampling mode |
| sbr->kx[1] = 32; //Typo in spec, kx' inits to 32 |
| sbr->m[1] = 0; |
| // Reset values for first SBR header |
| sbr->data[0].e_a[1] = sbr->data[1].e_a[1] = -1; |
| memset(&sbr->spectrum_params, -1, sizeof(SpectrumParameters)); |
| } |
| |
| av_cold void AAC_RENAME(ff_aac_sbr_ctx_init)(AACContext *ac, SpectralBandReplication *sbr, int id_aac) |
| { |
| if(sbr->mdct.mdct_bits) |
| return; |
| sbr->kx[0] = sbr->kx[1]; |
| sbr->id_aac = id_aac; |
| sbr_turnoff(sbr); |
| sbr->data[0].synthesis_filterbank_samples_offset = SBR_SYNTHESIS_BUF_SIZE - (1280 - 128); |
| sbr->data[1].synthesis_filterbank_samples_offset = SBR_SYNTHESIS_BUF_SIZE - (1280 - 128); |
| /* SBR requires samples to be scaled to +/-32768.0 to work correctly. |
| * mdct scale factors are adjusted to scale up from +/-1.0 at analysis |
| * and scale back down at synthesis. */ |
| AAC_RENAME_32(ff_mdct_init)(&sbr->mdct, 7, 1, 1.0 / (64 * 32768.0)); |
| AAC_RENAME_32(ff_mdct_init)(&sbr->mdct_ana, 7, 1, -2.0 * 32768.0); |
| AAC_RENAME(ff_ps_ctx_init)(&sbr->ps); |
| AAC_RENAME(ff_sbrdsp_init)(&sbr->dsp); |
| aacsbr_func_ptr_init(&sbr->c); |
| } |
| |
| av_cold void AAC_RENAME(ff_aac_sbr_ctx_close)(SpectralBandReplication *sbr) |
| { |
| AAC_RENAME_32(ff_mdct_end)(&sbr->mdct); |
| AAC_RENAME_32(ff_mdct_end)(&sbr->mdct_ana); |
| } |
| |
| static int qsort_comparison_function_int16(const void *a, const void *b) |
| { |
| return *(const int16_t *)a - *(const int16_t *)b; |
| } |
| |
| static inline int in_table_int16(const int16_t *table, int last_el, int16_t needle) |
| { |
| int i; |
| for (i = 0; i <= last_el; i++) |
| if (table[i] == needle) |
| return 1; |
| return 0; |
| } |
| |
| /// Limiter Frequency Band Table (14496-3 sp04 p198) |
| static void sbr_make_f_tablelim(SpectralBandReplication *sbr) |
| { |
| int k; |
| if (sbr->bs_limiter_bands > 0) { |
| static const INTFLOAT bands_warped[3] = { Q23(1.32715174233856803909f), //2^(0.49/1.2) |
| Q23(1.18509277094158210129f), //2^(0.49/2) |
| Q23(1.11987160404675912501f) }; //2^(0.49/3) |
| const INTFLOAT lim_bands_per_octave_warped = bands_warped[sbr->bs_limiter_bands - 1]; |
| int16_t patch_borders[7]; |
| uint16_t *in = sbr->f_tablelim + 1, *out = sbr->f_tablelim; |
| |
| patch_borders[0] = sbr->kx[1]; |
| for (k = 1; k <= sbr->num_patches; k++) |
| patch_borders[k] = patch_borders[k-1] + sbr->patch_num_subbands[k-1]; |
| |
| memcpy(sbr->f_tablelim, sbr->f_tablelow, |
| (sbr->n[0] + 1) * sizeof(sbr->f_tablelow[0])); |
| if (sbr->num_patches > 1) |
| memcpy(sbr->f_tablelim + sbr->n[0] + 1, patch_borders + 1, |
| (sbr->num_patches - 1) * sizeof(patch_borders[0])); |
| |
| AV_QSORT(sbr->f_tablelim, sbr->num_patches + sbr->n[0], |
| uint16_t, |
| qsort_comparison_function_int16); |
| |
| sbr->n_lim = sbr->n[0] + sbr->num_patches - 1; |
| while (out < sbr->f_tablelim + sbr->n_lim) { |
| #if USE_FIXED |
| if ((*in << 23) >= *out * lim_bands_per_octave_warped) { |
| #else |
| if (*in >= *out * lim_bands_per_octave_warped) { |
| #endif /* USE_FIXED */ |
| *++out = *in++; |
| } else if (*in == *out || |
| !in_table_int16(patch_borders, sbr->num_patches, *in)) { |
| in++; |
| sbr->n_lim--; |
| } else if (!in_table_int16(patch_borders, sbr->num_patches, *out)) { |
| *out = *in++; |
| sbr->n_lim--; |
| } else { |
| *++out = *in++; |
| } |
| } |
| } else { |
| sbr->f_tablelim[0] = sbr->f_tablelow[0]; |
| sbr->f_tablelim[1] = sbr->f_tablelow[sbr->n[0]]; |
| sbr->n_lim = 1; |
| } |
| } |
| |
| static unsigned int read_sbr_header(SpectralBandReplication *sbr, GetBitContext *gb) |
| { |
| unsigned int cnt = get_bits_count(gb); |
| uint8_t bs_header_extra_1; |
| uint8_t bs_header_extra_2; |
| int old_bs_limiter_bands = sbr->bs_limiter_bands; |
| SpectrumParameters old_spectrum_params; |
| |
| sbr->start = 1; |
| sbr->ready_for_dequant = 0; |
| |
| // Save last spectrum parameters variables to compare to new ones |
| memcpy(&old_spectrum_params, &sbr->spectrum_params, sizeof(SpectrumParameters)); |
| |
| sbr->bs_amp_res_header = get_bits1(gb); |
| sbr->spectrum_params.bs_start_freq = get_bits(gb, 4); |
| sbr->spectrum_params.bs_stop_freq = get_bits(gb, 4); |
| sbr->spectrum_params.bs_xover_band = get_bits(gb, 3); |
| skip_bits(gb, 2); // bs_reserved |
| |
| bs_header_extra_1 = get_bits1(gb); |
| bs_header_extra_2 = get_bits1(gb); |
| |
| if (bs_header_extra_1) { |
| sbr->spectrum_params.bs_freq_scale = get_bits(gb, 2); |
| sbr->spectrum_params.bs_alter_scale = get_bits1(gb); |
| sbr->spectrum_params.bs_noise_bands = get_bits(gb, 2); |
| } else { |
| sbr->spectrum_params.bs_freq_scale = 2; |
| sbr->spectrum_params.bs_alter_scale = 1; |
| sbr->spectrum_params.bs_noise_bands = 2; |
| } |
| |
| // Check if spectrum parameters changed |
| if (memcmp(&old_spectrum_params, &sbr->spectrum_params, sizeof(SpectrumParameters))) |
| sbr->reset = 1; |
| |
| if (bs_header_extra_2) { |
| sbr->bs_limiter_bands = get_bits(gb, 2); |
| sbr->bs_limiter_gains = get_bits(gb, 2); |
| sbr->bs_interpol_freq = get_bits1(gb); |
| sbr->bs_smoothing_mode = get_bits1(gb); |
| } else { |
| sbr->bs_limiter_bands = 2; |
| sbr->bs_limiter_gains = 2; |
| sbr->bs_interpol_freq = 1; |
| sbr->bs_smoothing_mode = 1; |
| } |
| |
| if (sbr->bs_limiter_bands != old_bs_limiter_bands && !sbr->reset) |
| sbr_make_f_tablelim(sbr); |
| |
| return get_bits_count(gb) - cnt; |
| } |
| |
| static int array_min_int16(const int16_t *array, int nel) |
| { |
| int i, min = array[0]; |
| for (i = 1; i < nel; i++) |
| min = FFMIN(array[i], min); |
| return min; |
| } |
| |
| static int check_n_master(AVCodecContext *avctx, int n_master, int bs_xover_band) |
| { |
| // Requirements (14496-3 sp04 p205) |
| if (n_master <= 0) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid n_master: %d\n", n_master); |
| return -1; |
| } |
| if (bs_xover_band >= n_master) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Invalid bitstream, crossover band index beyond array bounds: %d\n", |
| bs_xover_band); |
| return -1; |
| } |
| return 0; |
| } |
| |
| /// Master Frequency Band Table (14496-3 sp04 p194) |
| static int sbr_make_f_master(AACContext *ac, SpectralBandReplication *sbr, |
| SpectrumParameters *spectrum) |
| { |
| unsigned int temp, max_qmf_subbands = 0; |
| unsigned int start_min, stop_min; |
| int k; |
| const int8_t *sbr_offset_ptr; |
| int16_t stop_dk[13]; |
| |
| switch (sbr->sample_rate) { |
| case 16000: |
| sbr_offset_ptr = sbr_offset[0]; |
| break; |
| case 22050: |
| sbr_offset_ptr = sbr_offset[1]; |
| break; |
| case 24000: |
| sbr_offset_ptr = sbr_offset[2]; |
| break; |
| case 32000: |
| sbr_offset_ptr = sbr_offset[3]; |
| break; |
| case 44100: case 48000: case 64000: |
| sbr_offset_ptr = sbr_offset[4]; |
| break; |
| case 88200: case 96000: case 128000: case 176400: case 192000: |
| sbr_offset_ptr = sbr_offset[5]; |
| break; |
| default: |
| av_log(ac->avctx, AV_LOG_ERROR, |
| "Unsupported sample rate for SBR: %d\n", sbr->sample_rate); |
| return -1; |
| } |
| |
| if (sbr->sample_rate < 32000) { |
| temp = 3000; |
| } else if (sbr->sample_rate < 64000) { |
| temp = 4000; |
| } else |
| temp = 5000; |
| |
| start_min = ((temp << 7) + (sbr->sample_rate >> 1)) / sbr->sample_rate; |
| stop_min = ((temp << 8) + (sbr->sample_rate >> 1)) / sbr->sample_rate; |
| |
| sbr->k[0] = start_min + sbr_offset_ptr[spectrum->bs_start_freq]; |
| |
| if (spectrum->bs_stop_freq < 14) { |
| sbr->k[2] = stop_min; |
| make_bands(stop_dk, stop_min, 64, 13); |
| AV_QSORT(stop_dk, 13, int16_t, qsort_comparison_function_int16); |
| for (k = 0; k < spectrum->bs_stop_freq; k++) |
| sbr->k[2] += stop_dk[k]; |
| } else if (spectrum->bs_stop_freq == 14) { |
| sbr->k[2] = 2*sbr->k[0]; |
| } else if (spectrum->bs_stop_freq == 15) { |
| sbr->k[2] = 3*sbr->k[0]; |
| } else { |
| av_log(ac->avctx, AV_LOG_ERROR, |
| "Invalid bs_stop_freq: %d\n", spectrum->bs_stop_freq); |
| return -1; |
| } |
| sbr->k[2] = FFMIN(64, sbr->k[2]); |
| |
| // Requirements (14496-3 sp04 p205) |
| if (sbr->sample_rate <= 32000) { |
| max_qmf_subbands = 48; |
| } else if (sbr->sample_rate == 44100) { |
| max_qmf_subbands = 35; |
| } else if (sbr->sample_rate >= 48000) |
| max_qmf_subbands = 32; |
| else |
| av_assert0(0); |
| |
| if (sbr->k[2] - sbr->k[0] > max_qmf_subbands) { |
| av_log(ac->avctx, AV_LOG_ERROR, |
| "Invalid bitstream, too many QMF subbands: %d\n", sbr->k[2] - sbr->k[0]); |
| return -1; |
| } |
| |
| if (!spectrum->bs_freq_scale) { |
| int dk, k2diff; |
| |
| dk = spectrum->bs_alter_scale + 1; |
| sbr->n_master = ((sbr->k[2] - sbr->k[0] + (dk&2)) >> dk) << 1; |
| if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band)) |
| return -1; |
| |
| for (k = 1; k <= sbr->n_master; k++) |
| sbr->f_master[k] = dk; |
| |
| k2diff = sbr->k[2] - sbr->k[0] - sbr->n_master * dk; |
| if (k2diff < 0) { |
| sbr->f_master[1]--; |
| sbr->f_master[2]-= (k2diff < -1); |
| } else if (k2diff) { |
| sbr->f_master[sbr->n_master]++; |
| } |
| |
| sbr->f_master[0] = sbr->k[0]; |
| for (k = 1; k <= sbr->n_master; k++) |
| sbr->f_master[k] += sbr->f_master[k - 1]; |
| |
| } else { |
| int half_bands = 7 - spectrum->bs_freq_scale; // bs_freq_scale = {1,2,3} |
| int two_regions, num_bands_0; |
| int vdk0_max, vdk1_min; |
| int16_t vk0[49]; |
| #if USE_FIXED |
| int tmp, nz = 0; |
| #endif /* USE_FIXED */ |
| |
| if (49 * sbr->k[2] > 110 * sbr->k[0]) { |
| two_regions = 1; |
| sbr->k[1] = 2 * sbr->k[0]; |
| } else { |
| two_regions = 0; |
| sbr->k[1] = sbr->k[2]; |
| } |
| |
| #if USE_FIXED |
| tmp = (sbr->k[1] << 23) / sbr->k[0]; |
| while (tmp < 0x40000000) { |
| tmp <<= 1; |
| nz++; |
| } |
| tmp = fixed_log(tmp - 0x80000000); |
| tmp = (int)(((int64_t)tmp * CONST_RECIP_LN2 + 0x20000000) >> 30); |
| tmp = (((tmp + 0x80) >> 8) + ((8 - nz) << 23)) * half_bands; |
| num_bands_0 = ((tmp + 0x400000) >> 23) * 2; |
| #else |
| num_bands_0 = lrintf(half_bands * log2f(sbr->k[1] / (float)sbr->k[0])) * 2; |
| #endif /* USE_FIXED */ |
| |
| if (num_bands_0 <= 0) { // Requirements (14496-3 sp04 p205) |
| av_log(ac->avctx, AV_LOG_ERROR, "Invalid num_bands_0: %d\n", num_bands_0); |
| return -1; |
| } |
| |
| vk0[0] = 0; |
| |
| make_bands(vk0+1, sbr->k[0], sbr->k[1], num_bands_0); |
| |
| AV_QSORT(vk0 + 1, num_bands_0, int16_t, qsort_comparison_function_int16); |
| vdk0_max = vk0[num_bands_0]; |
| |
| vk0[0] = sbr->k[0]; |
| for (k = 1; k <= num_bands_0; k++) { |
| if (vk0[k] <= 0) { // Requirements (14496-3 sp04 p205) |
| av_log(ac->avctx, AV_LOG_ERROR, "Invalid vDk0[%d]: %d\n", k, vk0[k]); |
| return -1; |
| } |
| vk0[k] += vk0[k-1]; |
| } |
| |
| if (two_regions) { |
| int16_t vk1[49]; |
| #if USE_FIXED |
| int num_bands_1; |
| |
| tmp = (sbr->k[2] << 23) / sbr->k[1]; |
| nz = 0; |
| while (tmp < 0x40000000) { |
| tmp <<= 1; |
| nz++; |
| } |
| tmp = fixed_log(tmp - 0x80000000); |
| tmp = (int)(((int64_t)tmp * CONST_RECIP_LN2 + 0x20000000) >> 30); |
| tmp = (((tmp + 0x80) >> 8) + ((8 - nz) << 23)) * half_bands; |
| if (spectrum->bs_alter_scale) |
| tmp = (int)(((int64_t)tmp * CONST_076923 + 0x40000000) >> 31); |
| num_bands_1 = ((tmp + 0x400000) >> 23) * 2; |
| #else |
| float invwarp = spectrum->bs_alter_scale ? 0.76923076923076923077f |
| : 1.0f; // bs_alter_scale = {0,1} |
| int num_bands_1 = lrintf(half_bands * invwarp * |
| log2f(sbr->k[2] / (float)sbr->k[1])) * 2; |
| #endif /* USE_FIXED */ |
| make_bands(vk1+1, sbr->k[1], sbr->k[2], num_bands_1); |
| |
| vdk1_min = array_min_int16(vk1 + 1, num_bands_1); |
| |
| if (vdk1_min < vdk0_max) { |
| int change; |
| AV_QSORT(vk1 + 1, num_bands_1, int16_t, qsort_comparison_function_int16); |
| change = FFMIN(vdk0_max - vk1[1], (vk1[num_bands_1] - vk1[1]) >> 1); |
| vk1[1] += change; |
| vk1[num_bands_1] -= change; |
| } |
| |
| AV_QSORT(vk1 + 1, num_bands_1, int16_t, qsort_comparison_function_int16); |
| |
| vk1[0] = sbr->k[1]; |
| for (k = 1; k <= num_bands_1; k++) { |
| if (vk1[k] <= 0) { // Requirements (14496-3 sp04 p205) |
| av_log(ac->avctx, AV_LOG_ERROR, "Invalid vDk1[%d]: %d\n", k, vk1[k]); |
| return -1; |
| } |
| vk1[k] += vk1[k-1]; |
| } |
| |
| sbr->n_master = num_bands_0 + num_bands_1; |
| if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band)) |
| return -1; |
| memcpy(&sbr->f_master[0], vk0, |
| (num_bands_0 + 1) * sizeof(sbr->f_master[0])); |
| memcpy(&sbr->f_master[num_bands_0 + 1], vk1 + 1, |
| num_bands_1 * sizeof(sbr->f_master[0])); |
| |
| } else { |
| sbr->n_master = num_bands_0; |
| if (check_n_master(ac->avctx, sbr->n_master, sbr->spectrum_params.bs_xover_band)) |
| return -1; |
| memcpy(sbr->f_master, vk0, (num_bands_0 + 1) * sizeof(sbr->f_master[0])); |
| } |
| } |
| |
| return 0; |
| } |
| |
| /// High Frequency Generation - Patch Construction (14496-3 sp04 p216 fig. 4.46) |
| static int sbr_hf_calc_npatches(AACContext *ac, SpectralBandReplication *sbr) |
| { |
| int i, k, last_k = -1, last_msb = -1, sb = 0; |
| int msb = sbr->k[0]; |
| int usb = sbr->kx[1]; |
| int goal_sb = ((1000 << 11) + (sbr->sample_rate >> 1)) / sbr->sample_rate; |
| |
| sbr->num_patches = 0; |
| |
| if (goal_sb < sbr->kx[1] + sbr->m[1]) { |
| for (k = 0; sbr->f_master[k] < goal_sb; k++) ; |
| } else |
| k = sbr->n_master; |
| |
| do { |
| int odd = 0; |
| if (k == last_k && msb == last_msb) { |
| av_log(ac->avctx, AV_LOG_ERROR, "patch construction failed\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| last_k = k; |
| last_msb = msb; |
| for (i = k; i == k || sb > (sbr->k[0] - 1 + msb - odd); i--) { |
| sb = sbr->f_master[i]; |
| odd = (sb + sbr->k[0]) & 1; |
| } |
| |
| // Requirements (14496-3 sp04 p205) sets the maximum number of patches to 5. |
| // After this check the final number of patches can still be six which is |
| // illegal however the Coding Technologies decoder check stream has a final |
| // count of 6 patches |
| if (sbr->num_patches > 5) { |
| av_log(ac->avctx, AV_LOG_ERROR, "Too many patches: %d\n", sbr->num_patches); |
| return -1; |
| } |
| |
| sbr->patch_num_subbands[sbr->num_patches] = FFMAX(sb - usb, 0); |
| sbr->patch_start_subband[sbr->num_patches] = sbr->k[0] - odd - sbr->patch_num_subbands[sbr->num_patches]; |
| |
| if (sbr->patch_num_subbands[sbr->num_patches] > 0) { |
| usb = sb; |
| msb = sb; |
| sbr->num_patches++; |
| } else |
| msb = sbr->kx[1]; |
| |
| if (sbr->f_master[k] - sb < 3) |
| k = sbr->n_master; |
| } while (sb != sbr->kx[1] + sbr->m[1]); |
| |
| if (sbr->num_patches > 1 && |
| sbr->patch_num_subbands[sbr->num_patches - 1] < 3) |
| sbr->num_patches--; |
| |
| return 0; |
| } |
| |
| /// Derived Frequency Band Tables (14496-3 sp04 p197) |
| static int sbr_make_f_derived(AACContext *ac, SpectralBandReplication *sbr) |
| { |
| int k, temp; |
| #if USE_FIXED |
| int nz = 0; |
| #endif /* USE_FIXED */ |
| |
| sbr->n[1] = sbr->n_master - sbr->spectrum_params.bs_xover_band; |
| sbr->n[0] = (sbr->n[1] + 1) >> 1; |
| |
| memcpy(sbr->f_tablehigh, &sbr->f_master[sbr->spectrum_params.bs_xover_band], |
| (sbr->n[1] + 1) * sizeof(sbr->f_master[0])); |
| sbr->m[1] = sbr->f_tablehigh[sbr->n[1]] - sbr->f_tablehigh[0]; |
| sbr->kx[1] = sbr->f_tablehigh[0]; |
| |
| // Requirements (14496-3 sp04 p205) |
| if (sbr->kx[1] + sbr->m[1] > 64) { |
| av_log(ac->avctx, AV_LOG_ERROR, |
| "Stop frequency border too high: %d\n", sbr->kx[1] + sbr->m[1]); |
| return -1; |
| } |
| if (sbr->kx[1] > 32) { |
| av_log(ac->avctx, AV_LOG_ERROR, "Start frequency border too high: %d\n", sbr->kx[1]); |
| return -1; |
| } |
| |
| sbr->f_tablelow[0] = sbr->f_tablehigh[0]; |
| temp = sbr->n[1] & 1; |
| for (k = 1; k <= sbr->n[0]; k++) |
| sbr->f_tablelow[k] = sbr->f_tablehigh[2 * k - temp]; |
| #if USE_FIXED |
| temp = (sbr->k[2] << 23) / sbr->kx[1]; |
| while (temp < 0x40000000) { |
| temp <<= 1; |
| nz++; |
| } |
| temp = fixed_log(temp - 0x80000000); |
| temp = (int)(((int64_t)temp * CONST_RECIP_LN2 + 0x20000000) >> 30); |
| temp = (((temp + 0x80) >> 8) + ((8 - nz) << 23)) * sbr->spectrum_params.bs_noise_bands; |
| |
| sbr->n_q = (temp + 0x400000) >> 23; |
| if (sbr->n_q < 1) |
| sbr->n_q = 1; |
| #else |
| sbr->n_q = FFMAX(1, lrintf(sbr->spectrum_params.bs_noise_bands * |
| log2f(sbr->k[2] / (float)sbr->kx[1]))); // 0 <= bs_noise_bands <= 3 |
| #endif /* USE_FIXED */ |
| |
| if (sbr->n_q > 5) { |
| av_log(ac->avctx, AV_LOG_ERROR, "Too many noise floor scale factors: %d\n", sbr->n_q); |
| return -1; |
| } |
| |
| sbr->f_tablenoise[0] = sbr->f_tablelow[0]; |
| temp = 0; |
| for (k = 1; k <= sbr->n_q; k++) { |
| temp += (sbr->n[0] - temp) / (sbr->n_q + 1 - k); |
| sbr->f_tablenoise[k] = sbr->f_tablelow[temp]; |
| } |
| |
| if (sbr_hf_calc_npatches(ac, sbr) < 0) |
| return -1; |
| |
| sbr_make_f_tablelim(sbr); |
| |
| sbr->data[0].f_indexnoise = 0; |
| sbr->data[1].f_indexnoise = 0; |
| |
| return 0; |
| } |
| |
| static av_always_inline void get_bits1_vector(GetBitContext *gb, uint8_t *vec, |
| int elements) |
| { |
| int i; |
| for (i = 0; i < elements; i++) { |
| vec[i] = get_bits1(gb); |
| } |
| } |
| |
| /** ceil(log2(index+1)) */ |
| static const int8_t ceil_log2[] = { |
| 0, 1, 2, 2, 3, 3, |
| }; |
| |
| static int read_sbr_grid(AACContext *ac, SpectralBandReplication *sbr, |
| GetBitContext *gb, SBRData *ch_data) |
| { |
| int i; |
| int bs_pointer = 0; |
| // frameLengthFlag ? 15 : 16; 960 sample length frames unsupported; this value is numTimeSlots |
| int abs_bord_trail = 16; |
| int num_rel_lead, num_rel_trail; |
| unsigned bs_num_env_old = ch_data->bs_num_env; |
| int bs_frame_class, bs_num_env; |
| |
| ch_data->bs_freq_res[0] = ch_data->bs_freq_res[ch_data->bs_num_env]; |
| ch_data->bs_amp_res = sbr->bs_amp_res_header; |
| ch_data->t_env_num_env_old = ch_data->t_env[bs_num_env_old]; |
| |
| switch (bs_frame_class = get_bits(gb, 2)) { |
| case FIXFIX: |
| bs_num_env = 1 << get_bits(gb, 2); |
| if (bs_num_env > 4) { |
| av_log(ac->avctx, AV_LOG_ERROR, |
| "Invalid bitstream, too many SBR envelopes in FIXFIX type SBR frame: %d\n", |
| bs_num_env); |
| return -1; |
| } |
| ch_data->bs_num_env = bs_num_env; |
| num_rel_lead = ch_data->bs_num_env - 1; |
| if (ch_data->bs_num_env == 1) |
| ch_data->bs_amp_res = 0; |
| |
| |
| ch_data->t_env[0] = 0; |
| ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; |
| |
| abs_bord_trail = (abs_bord_trail + (ch_data->bs_num_env >> 1)) / |
| ch_data->bs_num_env; |
| for (i = 0; i < num_rel_lead; i++) |
| ch_data->t_env[i + 1] = ch_data->t_env[i] + abs_bord_trail; |
| |
| ch_data->bs_freq_res[1] = get_bits1(gb); |
| for (i = 1; i < ch_data->bs_num_env; i++) |
| ch_data->bs_freq_res[i + 1] = ch_data->bs_freq_res[1]; |
| break; |
| case FIXVAR: |
| abs_bord_trail += get_bits(gb, 2); |
| num_rel_trail = get_bits(gb, 2); |
| ch_data->bs_num_env = num_rel_trail + 1; |
| ch_data->t_env[0] = 0; |
| ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; |
| |
| for (i = 0; i < num_rel_trail; i++) |
| ch_data->t_env[ch_data->bs_num_env - 1 - i] = |
| ch_data->t_env[ch_data->bs_num_env - i] - 2 * get_bits(gb, 2) - 2; |
| |
| bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]); |
| |
| for (i = 0; i < ch_data->bs_num_env; i++) |
| ch_data->bs_freq_res[ch_data->bs_num_env - i] = get_bits1(gb); |
| break; |
| case VARFIX: |
| ch_data->t_env[0] = get_bits(gb, 2); |
| num_rel_lead = get_bits(gb, 2); |
| ch_data->bs_num_env = num_rel_lead + 1; |
| ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; |
| |
| for (i = 0; i < num_rel_lead; i++) |
| ch_data->t_env[i + 1] = ch_data->t_env[i] + 2 * get_bits(gb, 2) + 2; |
| |
| bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]); |
| |
| get_bits1_vector(gb, ch_data->bs_freq_res + 1, ch_data->bs_num_env); |
| break; |
| case VARVAR: |
| ch_data->t_env[0] = get_bits(gb, 2); |
| abs_bord_trail += get_bits(gb, 2); |
| num_rel_lead = get_bits(gb, 2); |
| num_rel_trail = get_bits(gb, 2); |
| bs_num_env = num_rel_lead + num_rel_trail + 1; |
| |
| if (bs_num_env > 5) { |
| av_log(ac->avctx, AV_LOG_ERROR, |
| "Invalid bitstream, too many SBR envelopes in VARVAR type SBR frame: %d\n", |
| bs_num_env); |
| return -1; |
| } |
| ch_data->bs_num_env = bs_num_env; |
| |
| ch_data->t_env[ch_data->bs_num_env] = abs_bord_trail; |
| |
| for (i = 0; i < num_rel_lead; i++) |
| ch_data->t_env[i + 1] = ch_data->t_env[i] + 2 * get_bits(gb, 2) + 2; |
| for (i = 0; i < num_rel_trail; i++) |
| ch_data->t_env[ch_data->bs_num_env - 1 - i] = |
| ch_data->t_env[ch_data->bs_num_env - i] - 2 * get_bits(gb, 2) - 2; |
| |
| bs_pointer = get_bits(gb, ceil_log2[ch_data->bs_num_env]); |
| |
| get_bits1_vector(gb, ch_data->bs_freq_res + 1, ch_data->bs_num_env); |
| break; |
| } |
| ch_data->bs_frame_class = bs_frame_class; |
| |
| av_assert0(bs_pointer >= 0); |
| if (bs_pointer > ch_data->bs_num_env + 1) { |
| av_log(ac->avctx, AV_LOG_ERROR, |
| "Invalid bitstream, bs_pointer points to a middle noise border outside the time borders table: %d\n", |
| bs_pointer); |
| return -1; |
| } |
| |
| for (i = 1; i <= ch_data->bs_num_env; i++) { |
| if (ch_data->t_env[i-1] >= ch_data->t_env[i]) { |
| av_log(ac->avctx, AV_LOG_ERROR, "Not strictly monotone time borders\n"); |
| return -1; |
| } |
| } |
| |
| ch_data->bs_num_noise = (ch_data->bs_num_env > 1) + 1; |
| |
| ch_data->t_q[0] = ch_data->t_env[0]; |
| ch_data->t_q[ch_data->bs_num_noise] = ch_data->t_env[ch_data->bs_num_env]; |
| if (ch_data->bs_num_noise > 1) { |
| int idx; |
| if (ch_data->bs_frame_class == FIXFIX) { |
| idx = ch_data->bs_num_env >> 1; |
| } else if (ch_data->bs_frame_class & 1) { // FIXVAR or VARVAR |
| idx = ch_data->bs_num_env - FFMAX(bs_pointer - 1, 1); |
| } else { // VARFIX |
| if (!bs_pointer) |
| idx = 1; |
| else if (bs_pointer == 1) |
| idx = ch_data->bs_num_env - 1; |
| else // bs_pointer > 1 |
| idx = bs_pointer - 1; |
| } |
| ch_data->t_q[1] = ch_data->t_env[idx]; |
| } |
| |
| ch_data->e_a[0] = -(ch_data->e_a[1] != bs_num_env_old); // l_APrev |
| ch_data->e_a[1] = -1; |
| if ((ch_data->bs_frame_class & 1) && bs_pointer) { // FIXVAR or VARVAR and bs_pointer != 0 |
| ch_data->e_a[1] = ch_data->bs_num_env + 1 - bs_pointer; |
| } else if ((ch_data->bs_frame_class == 2) && (bs_pointer > 1)) // VARFIX and bs_pointer > 1 |
| ch_data->e_a[1] = bs_pointer - 1; |
| |
| return 0; |
| } |
| |
| static void copy_sbr_grid(SBRData *dst, const SBRData *src) { |
| //These variables are saved from the previous frame rather than copied |
| dst->bs_freq_res[0] = dst->bs_freq_res[dst->bs_num_env]; |
| dst->t_env_num_env_old = dst->t_env[dst->bs_num_env]; |
| dst->e_a[0] = -(dst->e_a[1] != dst->bs_num_env); |
| |
| //These variables are read from the bitstream and therefore copied |
| memcpy(dst->bs_freq_res+1, src->bs_freq_res+1, sizeof(dst->bs_freq_res)-sizeof(*dst->bs_freq_res)); |
| memcpy(dst->t_env, src->t_env, sizeof(dst->t_env)); |
| memcpy(dst->t_q, src->t_q, sizeof(dst->t_q)); |
| dst->bs_num_env = src->bs_num_env; |
| dst->bs_amp_res = src->bs_amp_res; |
| dst->bs_num_noise = src->bs_num_noise; |
| dst->bs_frame_class = src->bs_frame_class; |
| dst->e_a[1] = src->e_a[1]; |
| } |
| |
| /// Read how the envelope and noise floor data is delta coded |
| static void read_sbr_dtdf(SpectralBandReplication *sbr, GetBitContext *gb, |
| SBRData *ch_data) |
| { |
| get_bits1_vector(gb, ch_data->bs_df_env, ch_data->bs_num_env); |
| get_bits1_vector(gb, ch_data->bs_df_noise, ch_data->bs_num_noise); |
| } |
| |
| /// Read inverse filtering data |
| static void read_sbr_invf(SpectralBandReplication *sbr, GetBitContext *gb, |
| SBRData *ch_data) |
| { |
| int i; |
| |
| memcpy(ch_data->bs_invf_mode[1], ch_data->bs_invf_mode[0], 5 * sizeof(uint8_t)); |
| for (i = 0; i < sbr->n_q; i++) |
| ch_data->bs_invf_mode[0][i] = get_bits(gb, 2); |
| } |
| |
| static int read_sbr_envelope(AACContext *ac, SpectralBandReplication *sbr, GetBitContext *gb, |
| SBRData *ch_data, int ch) |
| { |
| int bits; |
| int i, j, k; |
| VLC_TYPE (*t_huff)[2], (*f_huff)[2]; |
| int t_lav, f_lav; |
| const int delta = (ch == 1 && sbr->bs_coupling == 1) + 1; |
| const int odd = sbr->n[1] & 1; |
| |
| if (sbr->bs_coupling && ch) { |
| if (ch_data->bs_amp_res) { |
| bits = 5; |
| t_huff = vlc_sbr[T_HUFFMAN_ENV_BAL_3_0DB].table; |
| t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_BAL_3_0DB]; |
| f_huff = vlc_sbr[F_HUFFMAN_ENV_BAL_3_0DB].table; |
| f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_BAL_3_0DB]; |
| } else { |
| bits = 6; |
| t_huff = vlc_sbr[T_HUFFMAN_ENV_BAL_1_5DB].table; |
| t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_BAL_1_5DB]; |
| f_huff = vlc_sbr[F_HUFFMAN_ENV_BAL_1_5DB].table; |
| f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_BAL_1_5DB]; |
| } |
| } else { |
| if (ch_data->bs_amp_res) { |
| bits = 6; |
| t_huff = vlc_sbr[T_HUFFMAN_ENV_3_0DB].table; |
| t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_3_0DB]; |
| f_huff = vlc_sbr[F_HUFFMAN_ENV_3_0DB].table; |
| f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_3_0DB]; |
| } else { |
| bits = 7; |
| t_huff = vlc_sbr[T_HUFFMAN_ENV_1_5DB].table; |
| t_lav = vlc_sbr_lav[T_HUFFMAN_ENV_1_5DB]; |
| f_huff = vlc_sbr[F_HUFFMAN_ENV_1_5DB].table; |
| f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_1_5DB]; |
| } |
| } |
| |
| for (i = 0; i < ch_data->bs_num_env; i++) { |
| if (ch_data->bs_df_env[i]) { |
| // bs_freq_res[0] == bs_freq_res[bs_num_env] from prev frame |
| if (ch_data->bs_freq_res[i + 1] == ch_data->bs_freq_res[i]) { |
| for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) { |
| ch_data->env_facs_q[i + 1][j] = ch_data->env_facs_q[i][j] + delta * (get_vlc2(gb, t_huff, 9, 3) - t_lav); |
| if (ch_data->env_facs_q[i + 1][j] > 127U) { |
| av_log(ac->avctx, AV_LOG_ERROR, "env_facs_q %d is invalid\n", ch_data->env_facs_q[i + 1][j]); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| } else if (ch_data->bs_freq_res[i + 1]) { |
| for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) { |
| k = (j + odd) >> 1; // find k such that f_tablelow[k] <= f_tablehigh[j] < f_tablelow[k + 1] |
| ch_data->env_facs_q[i + 1][j] = ch_data->env_facs_q[i][k] + delta * (get_vlc2(gb, t_huff, 9, 3) - t_lav); |
| if (ch_data->env_facs_q[i + 1][j] > 127U) { |
| av_log(ac->avctx, AV_LOG_ERROR, "env_facs_q %d is invalid\n", ch_data->env_facs_q[i + 1][j]); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| } else { |
| for (j = 0; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) { |
| k = j ? 2*j - odd : 0; // find k such that f_tablehigh[k] == f_tablelow[j] |
| ch_data->env_facs_q[i + 1][j] = ch_data->env_facs_q[i][k] + delta * (get_vlc2(gb, t_huff, 9, 3) - t_lav); |
| if (ch_data->env_facs_q[i + 1][j] > 127U) { |
| av_log(ac->avctx, AV_LOG_ERROR, "env_facs_q %d is invalid\n", ch_data->env_facs_q[i + 1][j]); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| } |
| } else { |
| ch_data->env_facs_q[i + 1][0] = delta * get_bits(gb, bits); // bs_env_start_value_balance |
| for (j = 1; j < sbr->n[ch_data->bs_freq_res[i + 1]]; j++) { |
| ch_data->env_facs_q[i + 1][j] = ch_data->env_facs_q[i + 1][j - 1] + delta * (get_vlc2(gb, f_huff, 9, 3) - f_lav); |
| if (ch_data->env_facs_q[i + 1][j] > 127U) { |
| av_log(ac->avctx, AV_LOG_ERROR, "env_facs_q %d is invalid\n", ch_data->env_facs_q[i + 1][j]); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| } |
| } |
| |
| //assign 0th elements of env_facs_q from last elements |
| memcpy(ch_data->env_facs_q[0], ch_data->env_facs_q[ch_data->bs_num_env], |
| sizeof(ch_data->env_facs_q[0])); |
| |
| return 0; |
| } |
| |
| static int read_sbr_noise(AACContext *ac, SpectralBandReplication *sbr, GetBitContext *gb, |
| SBRData *ch_data, int ch) |
| { |
| int i, j; |
| VLC_TYPE (*t_huff)[2], (*f_huff)[2]; |
| int t_lav, f_lav; |
| int delta = (ch == 1 && sbr->bs_coupling == 1) + 1; |
| |
| if (sbr->bs_coupling && ch) { |
| t_huff = vlc_sbr[T_HUFFMAN_NOISE_BAL_3_0DB].table; |
| t_lav = vlc_sbr_lav[T_HUFFMAN_NOISE_BAL_3_0DB]; |
| f_huff = vlc_sbr[F_HUFFMAN_ENV_BAL_3_0DB].table; |
| f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_BAL_3_0DB]; |
| } else { |
| t_huff = vlc_sbr[T_HUFFMAN_NOISE_3_0DB].table; |
| t_lav = vlc_sbr_lav[T_HUFFMAN_NOISE_3_0DB]; |
| f_huff = vlc_sbr[F_HUFFMAN_ENV_3_0DB].table; |
| f_lav = vlc_sbr_lav[F_HUFFMAN_ENV_3_0DB]; |
| } |
| |
| for (i = 0; i < ch_data->bs_num_noise; i++) { |
| if (ch_data->bs_df_noise[i]) { |
| for (j = 0; j < sbr->n_q; j++) { |
| ch_data->noise_facs_q[i + 1][j] = ch_data->noise_facs_q[i][j] + delta * (get_vlc2(gb, t_huff, 9, 2) - t_lav); |
| if (ch_data->noise_facs_q[i + 1][j] > 30U) { |
| av_log(ac->avctx, AV_LOG_ERROR, "noise_facs_q %d is invalid\n", ch_data->noise_facs_q[i + 1][j]); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| } else { |
| ch_data->noise_facs_q[i + 1][0] = delta * get_bits(gb, 5); // bs_noise_start_value_balance or bs_noise_start_value_level |
| for (j = 1; j < sbr->n_q; j++) { |
| ch_data->noise_facs_q[i + 1][j] = ch_data->noise_facs_q[i + 1][j - 1] + delta * (get_vlc2(gb, f_huff, 9, 3) - f_lav); |
| if (ch_data->noise_facs_q[i + 1][j] > 30U) { |
| av_log(ac->avctx, AV_LOG_ERROR, "noise_facs_q %d is invalid\n", ch_data->noise_facs_q[i + 1][j]); |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| } |
| } |
| |
| //assign 0th elements of noise_facs_q from last elements |
| memcpy(ch_data->noise_facs_q[0], ch_data->noise_facs_q[ch_data->bs_num_noise], |
| sizeof(ch_data->noise_facs_q[0])); |
| return 0; |
| } |
| |
| static void read_sbr_extension(AACContext *ac, SpectralBandReplication *sbr, |
| GetBitContext *gb, |
| int bs_extension_id, int *num_bits_left) |
| { |
| switch (bs_extension_id) { |
| case EXTENSION_ID_PS: |
| if (!ac->oc[1].m4ac.ps) { |
| av_log(ac->avctx, AV_LOG_ERROR, "Parametric Stereo signaled to be not-present but was found in the bitstream.\n"); |
| skip_bits_long(gb, *num_bits_left); // bs_fill_bits |
| *num_bits_left = 0; |
| } else { |
| *num_bits_left -= AAC_RENAME(ff_ps_read_data)(ac->avctx, gb, &sbr->ps, *num_bits_left); |
| ac->avctx->profile = FF_PROFILE_AAC_HE_V2; |
| } |
| break; |
| default: |
| // some files contain 0-padding |
| if (bs_extension_id || *num_bits_left > 16 || show_bits(gb, *num_bits_left)) |
| avpriv_request_sample(ac->avctx, "Reserved SBR extensions"); |
| skip_bits_long(gb, *num_bits_left); // bs_fill_bits |
| *num_bits_left = 0; |
| break; |
| } |
| } |
| |
| static int read_sbr_single_channel_element(AACContext *ac, |
| SpectralBandReplication *sbr, |
| GetBitContext *gb) |
| { |
| int ret; |
| |
| if (get_bits1(gb)) // bs_data_extra |
| skip_bits(gb, 4); // bs_reserved |
| |
| if (read_sbr_grid(ac, sbr, gb, &sbr->data[0])) |
| return -1; |
| read_sbr_dtdf(sbr, gb, &sbr->data[0]); |
| read_sbr_invf(sbr, gb, &sbr->data[0]); |
| if((ret = read_sbr_envelope(ac, sbr, gb, &sbr->data[0], 0)) < 0) |
| return ret; |
| if((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[0], 0)) < 0) |
| return ret; |
| |
| if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb))) |
| get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]); |
| |
| return 0; |
| } |
| |
| static int read_sbr_channel_pair_element(AACContext *ac, |
| SpectralBandReplication *sbr, |
| GetBitContext *gb) |
| { |
| int ret; |
| |
| if (get_bits1(gb)) // bs_data_extra |
| skip_bits(gb, 8); // bs_reserved |
| |
| if ((sbr->bs_coupling = get_bits1(gb))) { |
| if (read_sbr_grid(ac, sbr, gb, &sbr->data[0])) |
| return -1; |
| copy_sbr_grid(&sbr->data[1], &sbr->data[0]); |
| read_sbr_dtdf(sbr, gb, &sbr->data[0]); |
| read_sbr_dtdf(sbr, gb, &sbr->data[1]); |
| read_sbr_invf(sbr, gb, &sbr->data[0]); |
| memcpy(sbr->data[1].bs_invf_mode[1], sbr->data[1].bs_invf_mode[0], sizeof(sbr->data[1].bs_invf_mode[0])); |
| memcpy(sbr->data[1].bs_invf_mode[0], sbr->data[0].bs_invf_mode[0], sizeof(sbr->data[1].bs_invf_mode[0])); |
| if((ret = read_sbr_envelope(ac, sbr, gb, &sbr->data[0], 0)) < 0) |
| return ret; |
| if((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[0], 0)) < 0) |
| return ret; |
| if((ret = read_sbr_envelope(ac, sbr, gb, &sbr->data[1], 1)) < 0) |
| return ret; |
| if((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[1], 1)) < 0) |
| return ret; |
| } else { |
| if (read_sbr_grid(ac, sbr, gb, &sbr->data[0]) || |
| read_sbr_grid(ac, sbr, gb, &sbr->data[1])) |
| return -1; |
| read_sbr_dtdf(sbr, gb, &sbr->data[0]); |
| read_sbr_dtdf(sbr, gb, &sbr->data[1]); |
| read_sbr_invf(sbr, gb, &sbr->data[0]); |
| read_sbr_invf(sbr, gb, &sbr->data[1]); |
| if((ret = read_sbr_envelope(ac, sbr, gb, &sbr->data[0], 0)) < 0) |
| return ret; |
| if((ret = read_sbr_envelope(ac, sbr, gb, &sbr->data[1], 1)) < 0) |
| return ret; |
| if((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[0], 0)) < 0) |
| return ret; |
| if((ret = read_sbr_noise(ac, sbr, gb, &sbr->data[1], 1)) < 0) |
| return ret; |
| } |
| |
| if ((sbr->data[0].bs_add_harmonic_flag = get_bits1(gb))) |
| get_bits1_vector(gb, sbr->data[0].bs_add_harmonic, sbr->n[1]); |
| if ((sbr->data[1].bs_add_harmonic_flag = get_bits1(gb))) |
| get_bits1_vector(gb, sbr->data[1].bs_add_harmonic, sbr->n[1]); |
| |
| return 0; |
| } |
| |
| static unsigned int read_sbr_data(AACContext *ac, SpectralBandReplication *sbr, |
| GetBitContext *gb, int id_aac) |
| { |
| unsigned int cnt = get_bits_count(gb); |
| |
| sbr->id_aac = id_aac; |
| sbr->ready_for_dequant = 1; |
| |
| if (id_aac == TYPE_SCE || id_aac == TYPE_CCE) { |
| if (read_sbr_single_channel_element(ac, sbr, gb)) { |
| sbr_turnoff(sbr); |
| return get_bits_count(gb) - cnt; |
| } |
| } else if (id_aac == TYPE_CPE) { |
| if (read_sbr_channel_pair_element(ac, sbr, gb)) { |
| sbr_turnoff(sbr); |
| return get_bits_count(gb) - cnt; |
| } |
| } else { |
| av_log(ac->avctx, AV_LOG_ERROR, |
| "Invalid bitstream - cannot apply SBR to element type %d\n", id_aac); |
| sbr_turnoff(sbr); |
| return get_bits_count(gb) - cnt; |
| } |
| if (get_bits1(gb)) { // bs_extended_data |
| int num_bits_left = get_bits(gb, 4); // bs_extension_size |
| if (num_bits_left == 15) |
| num_bits_left += get_bits(gb, 8); // bs_esc_count |
| |
| num_bits_left <<= 3; |
| while (num_bits_left > 7) { |
| num_bits_left -= 2; |
| read_sbr_extension(ac, sbr, gb, get_bits(gb, 2), &num_bits_left); // bs_extension_id |
| } |
| if (num_bits_left < 0) { |
| av_log(ac->avctx, AV_LOG_ERROR, "SBR Extension over read.\n"); |
| } |
| if (num_bits_left > 0) |
| skip_bits(gb, num_bits_left); |
| } |
| |
| return get_bits_count(gb) - cnt; |
| } |
| |
| static void sbr_reset(AACContext *ac, SpectralBandReplication *sbr) |
| { |
| int err; |
| err = sbr_make_f_master(ac, sbr, &sbr->spectrum_params); |
| if (err >= 0) |
| err = sbr_make_f_derived(ac, sbr); |
| if (err < 0) { |
| av_log(ac->avctx, AV_LOG_ERROR, |
| "SBR reset failed. Switching SBR to pure upsampling mode.\n"); |
| sbr_turnoff(sbr); |
| } |
| } |
| |
| /** |
| * Decode Spectral Band Replication extension data; reference: table 4.55. |
| * |
| * @param crc flag indicating the presence of CRC checksum |
| * @param cnt length of TYPE_FIL syntactic element in bytes |
| * |
| * @return Returns number of bytes consumed from the TYPE_FIL element. |
| */ |
| int AAC_RENAME(ff_decode_sbr_extension)(AACContext *ac, SpectralBandReplication *sbr, |
| GetBitContext *gb_host, int crc, int cnt, int id_aac) |
| { |
| unsigned int num_sbr_bits = 0, num_align_bits; |
| unsigned bytes_read; |
| GetBitContext gbc = *gb_host, *gb = &gbc; |
| skip_bits_long(gb_host, cnt*8 - 4); |
| |
| sbr->reset = 0; |
| |
| if (!sbr->sample_rate) |
| sbr->sample_rate = 2 * ac->oc[1].m4ac.sample_rate; //TODO use the nominal sample rate for arbitrary sample rate support |
| if (!ac->oc[1].m4ac.ext_sample_rate) |
| ac->oc[1].m4ac.ext_sample_rate = 2 * ac->oc[1].m4ac.sample_rate; |
| |
| if (crc) { |
| skip_bits(gb, 10); // bs_sbr_crc_bits; TODO - implement CRC check |
| num_sbr_bits += 10; |
| } |
| |
| //Save some state from the previous frame. |
| sbr->kx[0] = sbr->kx[1]; |
| sbr->m[0] = sbr->m[1]; |
| sbr->kx_and_m_pushed = 1; |
| |
| num_sbr_bits++; |
| if (get_bits1(gb)) // bs_header_flag |
| num_sbr_bits += read_sbr_header(sbr, gb); |
| |
| if (sbr->reset) |
| sbr_reset(ac, sbr); |
| |
| if (sbr->start) |
| num_sbr_bits += read_sbr_data(ac, sbr, gb, id_aac); |
| |
| num_align_bits = ((cnt << 3) - 4 - num_sbr_bits) & 7; |
| bytes_read = ((num_sbr_bits + num_align_bits + 4) >> 3); |
| |
| if (bytes_read > cnt) { |
| av_log(ac->avctx, AV_LOG_ERROR, |
| "Expected to read %d SBR bytes actually read %d.\n", cnt, bytes_read); |
| sbr_turnoff(sbr); |
| } |
| return cnt; |
| } |
| |
| /** |
| * Analysis QMF Bank (14496-3 sp04 p206) |
| * |
| * @param x pointer to the beginning of the first sample window |
| * @param W array of complex-valued samples split into subbands |
| */ |
| #ifndef sbr_qmf_analysis |
| #if USE_FIXED |
| static void sbr_qmf_analysis(AVFixedDSPContext *dsp, FFTContext *mdct, |
| #else |
| static void sbr_qmf_analysis(AVFloatDSPContext *dsp, FFTContext *mdct, |
| #endif /* USE_FIXED */ |
| SBRDSPContext *sbrdsp, const INTFLOAT *in, INTFLOAT *x, |
| INTFLOAT z[320], INTFLOAT W[2][32][32][2], int buf_idx) |
| { |
| int i; |
| #if USE_FIXED |
| int j; |
| #endif |
| memcpy(x , x+1024, (320-32)*sizeof(x[0])); |
| memcpy(x+288, in, 1024*sizeof(x[0])); |
| for (i = 0; i < 32; i++) { // numTimeSlots*RATE = 16*2 as 960 sample frames |
| // are not supported |
| dsp->vector_fmul_reverse(z, sbr_qmf_window_ds, x, 320); |
| sbrdsp->sum64x5(z); |
| sbrdsp->qmf_pre_shuffle(z); |
| #if USE_FIXED |
| for (j = 64; j < 128; j++) { |
| if (z[j] > 1<<24) { |
| av_log(NULL, AV_LOG_WARNING, |
| "sbr_qmf_analysis: value %09d too large, setting to %09d\n", |
| z[j], 1<<24); |
| z[j] = 1<<24; |
| } else if (z[j] < -(1<<24)) { |
| av_log(NULL, AV_LOG_WARNING, |
| "sbr_qmf_analysis: value %09d too small, setting to %09d\n", |
| z[j], -(1<<24)); |
| z[j] = -(1<<24); |
| } |
| } |
| #endif |
| mdct->imdct_half(mdct, z, z+64); |
| sbrdsp->qmf_post_shuffle(W[buf_idx][i], z); |
| x += 32; |
| } |
| } |
| #endif |
| |
| /** |
| * Synthesis QMF Bank (14496-3 sp04 p206) and Downsampled Synthesis QMF Bank |
| * (14496-3 sp04 p206) |
| */ |
| #ifndef sbr_qmf_synthesis |
| static void sbr_qmf_synthesis(FFTContext *mdct, |
| #if USE_FIXED |
| SBRDSPContext *sbrdsp, AVFixedDSPContext *dsp, |
| #else |
| SBRDSPContext *sbrdsp, AVFloatDSPContext *dsp, |
| #endif /* USE_FIXED */ |
| INTFLOAT *out, INTFLOAT X[2][38][64], |
| INTFLOAT mdct_buf[2][64], |
| INTFLOAT *v0, int *v_off, const unsigned int div) |
| { |
| int i, n; |
| const INTFLOAT *sbr_qmf_window = div ? sbr_qmf_window_ds : sbr_qmf_window_us; |
| const int step = 128 >> div; |
| INTFLOAT *v; |
| for (i = 0; i < 32; i++) { |
| if (*v_off < step) { |
| int saved_samples = (1280 - 128) >> div; |
| memcpy(&v0[SBR_SYNTHESIS_BUF_SIZE - saved_samples], v0, saved_samples * sizeof(INTFLOAT)); |
| *v_off = SBR_SYNTHESIS_BUF_SIZE - saved_samples - step; |
| } else { |
| *v_off -= step; |
| } |
| v = v0 + *v_off; |
| if (div) { |
| for (n = 0; n < 32; n++) { |
| X[0][i][ n] = -X[0][i][n]; |
| X[0][i][32+n] = X[1][i][31-n]; |
| } |
| mdct->imdct_half(mdct, mdct_buf[0], X[0][i]); |
| sbrdsp->qmf_deint_neg(v, mdct_buf[0]); |
| } else { |
| sbrdsp->neg_odd_64(X[1][i]); |
| mdct->imdct_half(mdct, mdct_buf[0], X[0][i]); |
| mdct->imdct_half(mdct, mdct_buf[1], X[1][i]); |
| sbrdsp->qmf_deint_bfly(v, mdct_buf[1], mdct_buf[0]); |
| } |
| dsp->vector_fmul (out, v , sbr_qmf_window , 64 >> div); |
| dsp->vector_fmul_add(out, v + ( 192 >> div), sbr_qmf_window + ( 64 >> div), out , 64 >> div); |
| dsp->vector_fmul_add(out, v + ( 256 >> div), sbr_qmf_window + (128 >> div), out , 64 >> div); |
| dsp->vector_fmul_add(out, v + ( 448 >> div), sbr_qmf_window + (192 >> div), out , 64 >> div); |
| dsp->vector_fmul_add(out, v + ( 512 >> div), sbr_qmf_window + (256 >> div), out , 64 >> div); |
| dsp->vector_fmul_add(out, v + ( 704 >> div), sbr_qmf_window + (320 >> div), out , 64 >> div); |
| dsp->vector_fmul_add(out, v + ( 768 >> div), sbr_qmf_window + (384 >> div), out , 64 >> div); |
| dsp->vector_fmul_add(out, v + ( 960 >> div), sbr_qmf_window + (448 >> div), out , 64 >> div); |
| dsp->vector_fmul_add(out, v + (1024 >> div), sbr_qmf_window + (512 >> div), out , 64 >> div); |
| dsp->vector_fmul_add(out, v + (1216 >> div), sbr_qmf_window + (576 >> div), out , 64 >> div); |
| out += 64 >> div; |
| } |
| } |
| #endif |
| |
| /// Generate the subband filtered lowband |
| static int sbr_lf_gen(AACContext *ac, SpectralBandReplication *sbr, |
| INTFLOAT X_low[32][40][2], const INTFLOAT W[2][32][32][2], |
| int buf_idx) |
| { |
| int i, k; |
| const int t_HFGen = 8; |
| const int i_f = 32; |
| memset(X_low, 0, 32*sizeof(*X_low)); |
| for (k = 0; k < sbr->kx[1]; k++) { |
| for (i = t_HFGen; i < i_f + t_HFGen; i++) { |
| X_low[k][i][0] = W[buf_idx][i - t_HFGen][k][0]; |
| X_low[k][i][1] = W[buf_idx][i - t_HFGen][k][1]; |
| } |
| } |
| buf_idx = 1-buf_idx; |
| for (k = 0; k < sbr->kx[0]; k++) { |
| for (i = 0; i < t_HFGen; i++) { |
| X_low[k][i][0] = W[buf_idx][i + i_f - t_HFGen][k][0]; |
| X_low[k][i][1] = W[buf_idx][i + i_f - t_HFGen][k][1]; |
| } |
| } |
| return 0; |
| } |
| |
| /// High Frequency Generator (14496-3 sp04 p215) |
| static int sbr_hf_gen(AACContext *ac, SpectralBandReplication *sbr, |
| INTFLOAT X_high[64][40][2], const INTFLOAT X_low[32][40][2], |
| const INTFLOAT (*alpha0)[2], const INTFLOAT (*alpha1)[2], |
| const INTFLOAT bw_array[5], const uint8_t *t_env, |
| int bs_num_env) |
| { |
| int j, x; |
| int g = 0; |
| int k = sbr->kx[1]; |
| for (j = 0; j < sbr->num_patches; j++) { |
| for (x = 0; x < sbr->patch_num_subbands[j]; x++, k++) { |
| const int p = sbr->patch_start_subband[j] + x; |
| while (g <= sbr->n_q && k >= sbr->f_tablenoise[g]) |
| g++; |
| g--; |
| |
| if (g < 0) { |
| av_log(ac->avctx, AV_LOG_ERROR, |
| "ERROR : no subband found for frequency %d\n", k); |
| return -1; |
| } |
| |
| sbr->dsp.hf_gen(X_high[k] + ENVELOPE_ADJUSTMENT_OFFSET, |
| X_low[p] + ENVELOPE_ADJUSTMENT_OFFSET, |
| alpha0[p], alpha1[p], bw_array[g], |
| 2 * t_env[0], 2 * t_env[bs_num_env]); |
| } |
| } |
| if (k < sbr->m[1] + sbr->kx[1]) |
| memset(X_high + k, 0, (sbr->m[1] + sbr->kx[1] - k) * sizeof(*X_high)); |
| |
| return 0; |
| } |
| |
| /// Generate the subband filtered lowband |
| static int sbr_x_gen(SpectralBandReplication *sbr, INTFLOAT X[2][38][64], |
| const INTFLOAT Y0[38][64][2], const INTFLOAT Y1[38][64][2], |
| const INTFLOAT X_low[32][40][2], int ch) |
| { |
| int k, i; |
| const int i_f = 32; |
| const int i_Temp = FFMAX(2*sbr->data[ch].t_env_num_env_old - i_f, 0); |
| memset(X, 0, 2*sizeof(*X)); |
| for (k = 0; k < sbr->kx[0]; k++) { |
| for (i = 0; i < i_Temp; i++) { |
| X[0][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][0]; |
| X[1][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][1]; |
| } |
| } |
| for (; k < sbr->kx[0] + sbr->m[0]; k++) { |
| for (i = 0; i < i_Temp; i++) { |
| X[0][i][k] = Y0[i + i_f][k][0]; |
| X[1][i][k] = Y0[i + i_f][k][1]; |
| } |
| } |
| |
| for (k = 0; k < sbr->kx[1]; k++) { |
| for (i = i_Temp; i < 38; i++) { |
| X[0][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][0]; |
| X[1][i][k] = X_low[k][i + ENVELOPE_ADJUSTMENT_OFFSET][1]; |
| } |
| } |
| for (; k < sbr->kx[1] + sbr->m[1]; k++) { |
| for (i = i_Temp; i < i_f; i++) { |
| X[0][i][k] = Y1[i][k][0]; |
| X[1][i][k] = Y1[i][k][1]; |
| } |
| } |
| return 0; |
| } |
| |
| /** High Frequency Adjustment (14496-3 sp04 p217) and Mapping |
| * (14496-3 sp04 p217) |
| */ |
| static int sbr_mapping(AACContext *ac, SpectralBandReplication *sbr, |
| SBRData *ch_data, int e_a[2]) |
| { |
| int e, i, m; |
| |
| memset(ch_data->s_indexmapped[1], 0, 7*sizeof(ch_data->s_indexmapped[1])); |
| for (e = 0; e < ch_data->bs_num_env; e++) { |
| const unsigned int ilim = sbr->n[ch_data->bs_freq_res[e + 1]]; |
| uint16_t *table = ch_data->bs_freq_res[e + 1] ? sbr->f_tablehigh : sbr->f_tablelow; |
| int k; |
| |
| if (sbr->kx[1] != table[0]) { |
| av_log(ac->avctx, AV_LOG_ERROR, "kx != f_table{high,low}[0]. " |
| "Derived frequency tables were not regenerated.\n"); |
| sbr_turnoff(sbr); |
| return AVERROR_BUG; |
| } |
| for (i = 0; i < ilim; i++) |
| for (m = table[i]; m < table[i + 1]; m++) |
| sbr->e_origmapped[e][m - sbr->kx[1]] = ch_data->env_facs[e+1][i]; |
| |
| // ch_data->bs_num_noise > 1 => 2 noise floors |
| k = (ch_data->bs_num_noise > 1) && (ch_data->t_env[e] >= ch_data->t_q[1]); |
| for (i = 0; i < sbr->n_q; i++) |
| for (m = sbr->f_tablenoise[i]; m < sbr->f_tablenoise[i + 1]; m++) |
| sbr->q_mapped[e][m - sbr->kx[1]] = ch_data->noise_facs[k+1][i]; |
| |
| for (i = 0; i < sbr->n[1]; i++) { |
| if (ch_data->bs_add_harmonic_flag) { |
| const unsigned int m_midpoint = |
| (sbr->f_tablehigh[i] + sbr->f_tablehigh[i + 1]) >> 1; |
| |
| ch_data->s_indexmapped[e + 1][m_midpoint - sbr->kx[1]] = ch_data->bs_add_harmonic[i] * |
| (e >= e_a[1] || (ch_data->s_indexmapped[0][m_midpoint - sbr->kx[1]] == 1)); |
| } |
| } |
| |
| for (i = 0; i < ilim; i++) { |
| int additional_sinusoid_present = 0; |
| for (m = table[i]; m < table[i + 1]; m++) { |
| if (ch_data->s_indexmapped[e + 1][m - sbr->kx[1]]) { |
| additional_sinusoid_present = 1; |
| break; |
| } |
| } |
| memset(&sbr->s_mapped[e][table[i] - sbr->kx[1]], additional_sinusoid_present, |
| (table[i + 1] - table[i]) * sizeof(sbr->s_mapped[e][0])); |
| } |
| } |
| |
| memcpy(ch_data->s_indexmapped[0], ch_data->s_indexmapped[ch_data->bs_num_env], sizeof(ch_data->s_indexmapped[0])); |
| return 0; |
| } |
| |
| /// Estimation of current envelope (14496-3 sp04 p218) |
| static void sbr_env_estimate(AAC_FLOAT (*e_curr)[48], INTFLOAT X_high[64][40][2], |
| SpectralBandReplication *sbr, SBRData *ch_data) |
| { |
| int e, m; |
| int kx1 = sbr->kx[1]; |
| |
| if (sbr->bs_interpol_freq) { |
| for (e = 0; e < ch_data->bs_num_env; e++) { |
| #if USE_FIXED |
| const SoftFloat recip_env_size = av_int2sf(0x20000000 / (ch_data->t_env[e + 1] - ch_data->t_env[e]), 30); |
| #else |
| const float recip_env_size = 0.5f / (ch_data->t_env[e + 1] - ch_data->t_env[e]); |
| #endif /* USE_FIXED */ |
| int ilb = ch_data->t_env[e] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; |
| int iub = ch_data->t_env[e + 1] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; |
| |
| for (m = 0; m < sbr->m[1]; m++) { |
| AAC_FLOAT sum = sbr->dsp.sum_square(X_high[m+kx1] + ilb, iub - ilb); |
| #if USE_FIXED |
| e_curr[e][m] = av_mul_sf(sum, recip_env_size); |
| #else |
| e_curr[e][m] = sum * recip_env_size; |
| #endif /* USE_FIXED */ |
| } |
| } |
| } else { |
| int k, p; |
| |
| for (e = 0; e < ch_data->bs_num_env; e++) { |
| const int env_size = 2 * (ch_data->t_env[e + 1] - ch_data->t_env[e]); |
| int ilb = ch_data->t_env[e] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; |
| int iub = ch_data->t_env[e + 1] * 2 + ENVELOPE_ADJUSTMENT_OFFSET; |
| const uint16_t *table = ch_data->bs_freq_res[e + 1] ? sbr->f_tablehigh : sbr->f_tablelow; |
| |
| for (p = 0; p < sbr->n[ch_data->bs_freq_res[e + 1]]; p++) { |
| #if USE_FIXED |
| SoftFloat sum = FLOAT_0; |
| const SoftFloat den = av_int2sf(0x20000000 / (env_size * (table[p + 1] - table[p])), 29); |
| for (k = table[p]; k < table[p + 1]; k++) { |
| sum = av_add_sf(sum, sbr->dsp.sum_square(X_high[k] + ilb, iub - ilb)); |
| } |
| sum = av_mul_sf(sum, den); |
| #else |
| float sum = 0.0f; |
| const int den = env_size * (table[p + 1] - table[p]); |
| |
| for (k = table[p]; k < table[p + 1]; k++) { |
| sum += sbr->dsp.sum_square(X_high[k] + ilb, iub - ilb); |
| } |
| sum /= den; |
| #endif /* USE_FIXED */ |
| for (k = table[p]; k < table[p + 1]; k++) { |
| e_curr[e][k - kx1] = sum; |
| } |
| } |
| } |
| } |
| } |
| |
| void AAC_RENAME(ff_sbr_apply)(AACContext *ac, SpectralBandReplication *sbr, int id_aac, |
| INTFLOAT* L, INTFLOAT* R) |
| { |
| int downsampled = ac->oc[1].m4ac.ext_sample_rate < sbr->sample_rate; |
| int ch; |
| int nch = (id_aac == TYPE_CPE) ? 2 : 1; |
| int err; |
| |
| if (id_aac != sbr->id_aac) { |
| av_log(ac->avctx, id_aac == TYPE_LFE ? AV_LOG_VERBOSE : AV_LOG_WARNING, |
| "element type mismatch %d != %d\n", id_aac, sbr->id_aac); |
| sbr_turnoff(sbr); |
| } |
| |
| if (sbr->start && !sbr->ready_for_dequant) { |
| av_log(ac->avctx, AV_LOG_ERROR, |
| "No quantized data read for sbr_dequant.\n"); |
| sbr_turnoff(sbr); |
| } |
| |
| if (!sbr->kx_and_m_pushed) { |
| sbr->kx[0] = sbr->kx[1]; |
| sbr->m[0] = sbr->m[1]; |
| } else { |
| sbr->kx_and_m_pushed = 0; |
| } |
| |
| if (sbr->start) { |
| sbr_dequant(sbr, id_aac); |
| sbr->ready_for_dequant = 0; |
| } |
| for (ch = 0; ch < nch; ch++) { |
| /* decode channel */ |
| sbr_qmf_analysis(ac->fdsp, &sbr->mdct_ana, &sbr->dsp, ch ? R : L, sbr->data[ch].analysis_filterbank_samples, |
| (INTFLOAT*)sbr->qmf_filter_scratch, |
| sbr->data[ch].W, sbr->data[ch].Ypos); |
| sbr->c.sbr_lf_gen(ac, sbr, sbr->X_low, |
| (const INTFLOAT (*)[32][32][2]) sbr->data[ch].W, |
| sbr->data[ch].Ypos); |
| sbr->data[ch].Ypos ^= 1; |
| if (sbr->start) { |
| sbr->c.sbr_hf_inverse_filter(&sbr->dsp, sbr->alpha0, sbr->alpha1, |
| (const INTFLOAT (*)[40][2]) sbr->X_low, sbr->k[0]); |
| sbr_chirp(sbr, &sbr->data[ch]); |
| av_assert0(sbr->data[ch].bs_num_env > 0); |
| sbr_hf_gen(ac, sbr, sbr->X_high, |
| (const INTFLOAT (*)[40][2]) sbr->X_low, |
| (const INTFLOAT (*)[2]) sbr->alpha0, |
| (const INTFLOAT (*)[2]) sbr->alpha1, |
| sbr->data[ch].bw_array, sbr->data[ch].t_env, |
| sbr->data[ch].bs_num_env); |
| |
| // hf_adj |
| err = sbr_mapping(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a); |
| if (!err) { |
| sbr_env_estimate(sbr->e_curr, sbr->X_high, sbr, &sbr->data[ch]); |
| sbr_gain_calc(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a); |
| sbr->c.sbr_hf_assemble(sbr->data[ch].Y[sbr->data[ch].Ypos], |
| (const INTFLOAT (*)[40][2]) sbr->X_high, |
| sbr, &sbr->data[ch], |
| sbr->data[ch].e_a); |
| } |
| } |
| |
| /* synthesis */ |
| sbr->c.sbr_x_gen(sbr, sbr->X[ch], |
| (const INTFLOAT (*)[64][2]) sbr->data[ch].Y[1-sbr->data[ch].Ypos], |
| (const INTFLOAT (*)[64][2]) sbr->data[ch].Y[ sbr->data[ch].Ypos], |
| (const INTFLOAT (*)[40][2]) sbr->X_low, ch); |
| } |
| |
| if (ac->oc[1].m4ac.ps == 1) { |
| if (sbr->ps.start) { |
| AAC_RENAME(ff_ps_apply)(ac->avctx, &sbr->ps, sbr->X[0], sbr->X[1], sbr->kx[1] + sbr->m[1]); |
| } else { |
| memcpy(sbr->X[1], sbr->X[0], sizeof(sbr->X[0])); |
| } |
| nch = 2; |
| } |
| |
| sbr_qmf_synthesis(&sbr->mdct, &sbr->dsp, ac->fdsp, |
| L, sbr->X[0], sbr->qmf_filter_scratch, |
| sbr->data[0].synthesis_filterbank_samples, |
| &sbr->data[0].synthesis_filterbank_samples_offset, |
| downsampled); |
| if (nch == 2) |
| sbr_qmf_synthesis(&sbr->mdct, &sbr->dsp, ac->fdsp, |
| R, sbr->X[1], sbr->qmf_filter_scratch, |
| sbr->data[1].synthesis_filterbank_samples, |
| &sbr->data[1].synthesis_filterbank_samples_offset, |
| downsampled); |
| } |
| |
| static void aacsbr_func_ptr_init(AACSBRContext *c) |
| { |
| c->sbr_lf_gen = sbr_lf_gen; |
| c->sbr_hf_assemble = sbr_hf_assemble; |
| c->sbr_x_gen = sbr_x_gen; |
| c->sbr_hf_inverse_filter = sbr_hf_inverse_filter; |
| |
| #if !USE_FIXED |
| if(ARCH_MIPS) |
| ff_aacsbr_func_ptr_init_mips(c); |
| #endif |
| } |
