| /* |
| * On2 Audio for Video Codec decoder |
| * |
| * Copyright (c) 2013 Konstantin Shishkov |
| * |
| * 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 |
| */ |
| |
| #include "libavutil/channel_layout.h" |
| #include "libavutil/ffmath.h" |
| #include "libavutil/float_dsp.h" |
| #include "avcodec.h" |
| #include "bytestream.h" |
| #include "fft.h" |
| #include "get_bits.h" |
| #include "internal.h" |
| |
| #include "on2avcdata.h" |
| |
| #define ON2AVC_SUBFRAME_SIZE 1024 |
| |
| enum WindowTypes { |
| WINDOW_TYPE_LONG = 0, |
| WINDOW_TYPE_LONG_STOP, |
| WINDOW_TYPE_LONG_START, |
| WINDOW_TYPE_8SHORT = 3, |
| WINDOW_TYPE_EXT4, |
| WINDOW_TYPE_EXT5, |
| WINDOW_TYPE_EXT6, |
| WINDOW_TYPE_EXT7, |
| }; |
| |
| typedef struct On2AVCContext { |
| AVCodecContext *avctx; |
| AVFloatDSPContext *fdsp; |
| FFTContext mdct, mdct_half, mdct_small; |
| FFTContext fft128, fft256, fft512, fft1024; |
| void (*wtf)(struct On2AVCContext *ctx, float *out, float *in, int size); |
| |
| int is_av500; |
| |
| const On2AVCMode *modes; |
| int window_type, prev_window_type; |
| int num_windows, num_bands; |
| int bits_per_section; |
| const int *band_start; |
| |
| int grouping[8]; |
| int ms_present; |
| int ms_info[ON2AVC_MAX_BANDS]; |
| |
| int is_long; |
| |
| uint8_t band_type[ON2AVC_MAX_BANDS]; |
| uint8_t band_run_end[ON2AVC_MAX_BANDS]; |
| int num_sections; |
| |
| float band_scales[ON2AVC_MAX_BANDS]; |
| |
| VLC scale_diff; |
| VLC cb_vlc[16]; |
| |
| float scale_tab[128]; |
| |
| DECLARE_ALIGNED(32, float, coeffs)[2][ON2AVC_SUBFRAME_SIZE]; |
| DECLARE_ALIGNED(32, float, delay) [2][ON2AVC_SUBFRAME_SIZE]; |
| |
| DECLARE_ALIGNED(32, float, temp) [ON2AVC_SUBFRAME_SIZE * 2]; |
| DECLARE_ALIGNED(32, float, mdct_buf) [ON2AVC_SUBFRAME_SIZE]; |
| DECLARE_ALIGNED(32, float, long_win) [ON2AVC_SUBFRAME_SIZE]; |
| DECLARE_ALIGNED(32, float, short_win)[ON2AVC_SUBFRAME_SIZE / 8]; |
| } On2AVCContext; |
| |
| static void on2avc_read_ms_info(On2AVCContext *c, GetBitContext *gb) |
| { |
| int w, b, band_off = 0; |
| |
| c->ms_present = get_bits1(gb); |
| if (!c->ms_present) |
| return; |
| for (w = 0; w < c->num_windows; w++) { |
| if (!c->grouping[w]) { |
| memcpy(c->ms_info + band_off, |
| c->ms_info + band_off - c->num_bands, |
| c->num_bands * sizeof(*c->ms_info)); |
| band_off += c->num_bands; |
| continue; |
| } |
| for (b = 0; b < c->num_bands; b++) |
| c->ms_info[band_off++] = get_bits1(gb); |
| } |
| } |
| |
| // do not see Table 17 in ISO/IEC 13818-7 |
| static int on2avc_decode_band_types(On2AVCContext *c, GetBitContext *gb) |
| { |
| int bits_per_sect = c->is_long ? 5 : 3; |
| int esc_val = (1 << bits_per_sect) - 1; |
| int num_bands = c->num_bands * c->num_windows; |
| int band = 0, i, band_type, run_len, run; |
| |
| while (band < num_bands) { |
| band_type = get_bits(gb, 4); |
| run_len = 1; |
| do { |
| run = get_bits(gb, bits_per_sect); |
| if (run > num_bands - band - run_len) { |
| av_log(c->avctx, AV_LOG_ERROR, "Invalid band type run\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| run_len += run; |
| } while (run == esc_val); |
| for (i = band; i < band + run_len; i++) { |
| c->band_type[i] = band_type; |
| c->band_run_end[i] = band + run_len; |
| } |
| band += run_len; |
| } |
| |
| return 0; |
| } |
| |
| // completely not like Table 18 in ISO/IEC 13818-7 |
| // (no intensity stereo, different coding for the first coefficient) |
| static int on2avc_decode_band_scales(On2AVCContext *c, GetBitContext *gb) |
| { |
| int w, w2, b, scale, first = 1; |
| int band_off = 0; |
| |
| for (w = 0; w < c->num_windows; w++) { |
| if (!c->grouping[w]) { |
| memcpy(c->band_scales + band_off, |
| c->band_scales + band_off - c->num_bands, |
| c->num_bands * sizeof(*c->band_scales)); |
| band_off += c->num_bands; |
| continue; |
| } |
| for (b = 0; b < c->num_bands; b++) { |
| if (!c->band_type[band_off]) { |
| int all_zero = 1; |
| for (w2 = w + 1; w2 < c->num_windows; w2++) { |
| if (c->grouping[w2]) |
| break; |
| if (c->band_type[w2 * c->num_bands + b]) { |
| all_zero = 0; |
| break; |
| } |
| } |
| if (all_zero) { |
| c->band_scales[band_off++] = 0; |
| continue; |
| } |
| } |
| if (first) { |
| scale = get_bits(gb, 7); |
| first = 0; |
| } else { |
| scale += get_vlc2(gb, c->scale_diff.table, 9, 3); |
| } |
| if (scale < 0 || scale > 127) { |
| av_log(c->avctx, AV_LOG_ERROR, "Invalid scale value %d\n", |
| scale); |
| return AVERROR_INVALIDDATA; |
| } |
| c->band_scales[band_off++] = c->scale_tab[scale]; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static inline float on2avc_scale(int v, float scale) |
| { |
| return v * sqrtf(abs(v)) * scale; |
| } |
| |
| // spectral data is coded completely differently - there are no unsigned codebooks |
| static int on2avc_decode_quads(On2AVCContext *c, GetBitContext *gb, float *dst, |
| int dst_size, int type, float band_scale) |
| { |
| int i, j, val, val1; |
| |
| for (i = 0; i < dst_size; i += 4) { |
| val = get_vlc2(gb, c->cb_vlc[type].table, 9, 2); |
| |
| for (j = 0; j < 4; j++) { |
| val1 = sign_extend((val >> (12 - j * 4)) & 0xF, 4); |
| *dst++ = on2avc_scale(val1, band_scale); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static inline int get_egolomb(GetBitContext *gb) |
| { |
| int v = 4; |
| |
| while (get_bits1(gb)) { |
| v++; |
| if (v > 30) { |
| av_log(NULL, AV_LOG_WARNING, "Too large golomb code in get_egolomb.\n"); |
| v = 30; |
| break; |
| } |
| } |
| |
| return (1 << v) + get_bits_long(gb, v); |
| } |
| |
| static int on2avc_decode_pairs(On2AVCContext *c, GetBitContext *gb, float *dst, |
| int dst_size, int type, float band_scale) |
| { |
| int i, val, val1, val2, sign; |
| |
| for (i = 0; i < dst_size; i += 2) { |
| val = get_vlc2(gb, c->cb_vlc[type].table, 9, 2); |
| |
| val1 = sign_extend(val >> 8, 8); |
| val2 = sign_extend(val & 0xFF, 8); |
| if (type == ON2AVC_ESC_CB) { |
| if (val1 <= -16 || val1 >= 16) { |
| sign = 1 - (val1 < 0) * 2; |
| val1 = sign * get_egolomb(gb); |
| } |
| if (val2 <= -16 || val2 >= 16) { |
| sign = 1 - (val2 < 0) * 2; |
| val2 = sign * get_egolomb(gb); |
| } |
| } |
| |
| *dst++ = on2avc_scale(val1, band_scale); |
| *dst++ = on2avc_scale(val2, band_scale); |
| } |
| |
| return 0; |
| } |
| |
| static int on2avc_read_channel_data(On2AVCContext *c, GetBitContext *gb, int ch) |
| { |
| int ret; |
| int w, b, band_idx; |
| float *coeff_ptr; |
| |
| if ((ret = on2avc_decode_band_types(c, gb)) < 0) |
| return ret; |
| if ((ret = on2avc_decode_band_scales(c, gb)) < 0) |
| return ret; |
| |
| coeff_ptr = c->coeffs[ch]; |
| band_idx = 0; |
| memset(coeff_ptr, 0, ON2AVC_SUBFRAME_SIZE * sizeof(*coeff_ptr)); |
| for (w = 0; w < c->num_windows; w++) { |
| for (b = 0; b < c->num_bands; b++) { |
| int band_size = c->band_start[b + 1] - c->band_start[b]; |
| int band_type = c->band_type[band_idx + b]; |
| |
| if (!band_type) { |
| coeff_ptr += band_size; |
| continue; |
| } |
| if (band_type < 9) |
| on2avc_decode_quads(c, gb, coeff_ptr, band_size, band_type, |
| c->band_scales[band_idx + b]); |
| else |
| on2avc_decode_pairs(c, gb, coeff_ptr, band_size, band_type, |
| c->band_scales[band_idx + b]); |
| coeff_ptr += band_size; |
| } |
| band_idx += c->num_bands; |
| } |
| |
| return 0; |
| } |
| |
| static int on2avc_apply_ms(On2AVCContext *c) |
| { |
| int w, b, i; |
| int band_off = 0; |
| float *ch0 = c->coeffs[0]; |
| float *ch1 = c->coeffs[1]; |
| |
| for (w = 0; w < c->num_windows; w++) { |
| for (b = 0; b < c->num_bands; b++) { |
| if (c->ms_info[band_off + b]) { |
| for (i = c->band_start[b]; i < c->band_start[b + 1]; i++) { |
| float l = *ch0, r = *ch1; |
| *ch0++ = l + r; |
| *ch1++ = l - r; |
| } |
| } else { |
| ch0 += c->band_start[b + 1] - c->band_start[b]; |
| ch1 += c->band_start[b + 1] - c->band_start[b]; |
| } |
| } |
| band_off += c->num_bands; |
| } |
| return 0; |
| } |
| |
| static void zero_head_and_tail(float *src, int len, int order0, int order1) |
| { |
| memset(src, 0, sizeof(*src) * order0); |
| memset(src + len - order1, 0, sizeof(*src) * order1); |
| } |
| |
| static void pretwiddle(float *src, float *dst, int dst_len, int tab_step, |
| int step, int order0, int order1, const double * const *tabs) |
| { |
| float *src2, *out; |
| const double *tab; |
| int i, j; |
| |
| out = dst; |
| tab = tabs[0]; |
| for (i = 0; i < tab_step; i++) { |
| double sum = 0; |
| for (j = 0; j < order0; j++) |
| sum += src[j] * tab[j * tab_step + i]; |
| out[i] += sum; |
| } |
| |
| out = dst + dst_len - tab_step; |
| tab = tabs[order0]; |
| src2 = src + (dst_len - tab_step) / step + 1 + order0; |
| for (i = 0; i < tab_step; i++) { |
| double sum = 0; |
| for (j = 0; j < order1; j++) |
| sum += src2[j] * tab[j * tab_step + i]; |
| out[i] += sum; |
| } |
| } |
| |
| static void twiddle(float *src1, float *src2, int src2_len, |
| const double *tab, int tab_len, int step, |
| int order0, int order1, const double * const *tabs) |
| { |
| int steps; |
| int mask; |
| int i, j; |
| |
| steps = (src2_len - tab_len) / step + 1; |
| pretwiddle(src1, src2, src2_len, tab_len, step, order0, order1, tabs); |
| mask = tab_len - 1; |
| |
| for (i = 0; i < steps; i++) { |
| float in0 = src1[order0 + i]; |
| int pos = (src2_len - 1) & mask; |
| |
| if (pos < tab_len) { |
| const double *t = tab; |
| for (j = pos; j >= 0; j--) |
| src2[j] += in0 * *t++; |
| for (j = 0; j < tab_len - pos - 1; j++) |
| src2[src2_len - j - 1] += in0 * tab[pos + 1 + j]; |
| } else { |
| for (j = 0; j < tab_len; j++) |
| src2[pos - j] += in0 * tab[j]; |
| } |
| mask = pos + step; |
| } |
| } |
| |
| #define CMUL1_R(s, t, is, it) \ |
| s[is + 0] * t[it + 0] - s[is + 1] * t[it + 1] |
| #define CMUL1_I(s, t, is, it) \ |
| s[is + 0] * t[it + 1] + s[is + 1] * t[it + 0] |
| #define CMUL2_R(s, t, is, it) \ |
| s[is + 0] * t[it + 0] + s[is + 1] * t[it + 1] |
| #define CMUL2_I(s, t, is, it) \ |
| s[is + 0] * t[it + 1] - s[is + 1] * t[it + 0] |
| |
| #define CMUL0(dst, id, s0, s1, s2, s3, t0, t1, t2, t3, is, it) \ |
| dst[id] = s0[is] * t0[it] + s1[is] * t1[it] \ |
| + s2[is] * t2[it] + s3[is] * t3[it]; \ |
| dst[id + 1] = s0[is] * t0[it + 1] + s1[is] * t1[it + 1] \ |
| + s2[is] * t2[it + 1] + s3[is] * t3[it + 1]; |
| |
| #define CMUL1(dst, s0, s1, s2, s3, t0, t1, t2, t3, is, it) \ |
| *dst++ = CMUL1_R(s0, t0, is, it) \ |
| + CMUL1_R(s1, t1, is, it) \ |
| + CMUL1_R(s2, t2, is, it) \ |
| + CMUL1_R(s3, t3, is, it); \ |
| *dst++ = CMUL1_I(s0, t0, is, it) \ |
| + CMUL1_I(s1, t1, is, it) \ |
| + CMUL1_I(s2, t2, is, it) \ |
| + CMUL1_I(s3, t3, is, it); |
| |
| #define CMUL2(dst, s0, s1, s2, s3, t0, t1, t2, t3, is, it) \ |
| *dst++ = CMUL2_R(s0, t0, is, it) \ |
| + CMUL2_R(s1, t1, is, it) \ |
| + CMUL2_R(s2, t2, is, it) \ |
| + CMUL2_R(s3, t3, is, it); \ |
| *dst++ = CMUL2_I(s0, t0, is, it) \ |
| + CMUL2_I(s1, t1, is, it) \ |
| + CMUL2_I(s2, t2, is, it) \ |
| + CMUL2_I(s3, t3, is, it); |
| |
| static void combine_fft(float *s0, float *s1, float *s2, float *s3, float *dst, |
| const float *t0, const float *t1, |
| const float *t2, const float *t3, int len, int step) |
| { |
| const float *h0, *h1, *h2, *h3; |
| float *d1, *d2; |
| int tmp, half; |
| int len2 = len >> 1, len4 = len >> 2; |
| int hoff; |
| int i, j, k; |
| |
| tmp = step; |
| for (half = len2; tmp > 1; half <<= 1, tmp >>= 1); |
| |
| h0 = t0 + half; |
| h1 = t1 + half; |
| h2 = t2 + half; |
| h3 = t3 + half; |
| |
| CMUL0(dst, 0, s0, s1, s2, s3, t0, t1, t2, t3, 0, 0); |
| |
| hoff = 2 * step * (len4 >> 1); |
| |
| j = 2; |
| k = 2 * step; |
| d1 = dst + 2; |
| d2 = dst + 2 + (len >> 1); |
| for (i = 0; i < (len4 - 1) >> 1; i++) { |
| CMUL1(d1, s0, s1, s2, s3, t0, t1, t2, t3, j, k); |
| CMUL1(d2, s0, s1, s2, s3, h0, h1, h2, h3, j, k); |
| j += 2; |
| k += 2 * step; |
| } |
| CMUL0(dst, len4, s0, s1, s2, s3, t0, t1, t2, t3, 1, hoff); |
| CMUL0(dst, len4 + len2, s0, s1, s2, s3, h0, h1, h2, h3, 1, hoff); |
| |
| j = len4; |
| k = hoff + 2 * step * len4; |
| d1 = dst + len4 + 2; |
| d2 = dst + len4 + 2 + len2; |
| for (i = 0; i < (len4 - 2) >> 1; i++) { |
| CMUL2(d1, s0, s1, s2, s3, t0, t1, t2, t3, j, k); |
| CMUL2(d2, s0, s1, s2, s3, h0, h1, h2, h3, j, k); |
| j -= 2; |
| k += 2 * step; |
| } |
| CMUL0(dst, len2 + 4, s0, s1, s2, s3, t0, t1, t2, t3, 0, k); |
| } |
| |
| static void wtf_end_512(On2AVCContext *c, float *out, float *src, |
| float *tmp0, float *tmp1) |
| { |
| memcpy(src, tmp0, 384 * sizeof(*tmp0)); |
| memcpy(tmp0 + 384, src + 384, 128 * sizeof(*tmp0)); |
| |
| zero_head_and_tail(src, 128, 16, 4); |
| zero_head_and_tail(src + 128, 128, 16, 4); |
| zero_head_and_tail(src + 256, 128, 13, 7); |
| zero_head_and_tail(src + 384, 128, 15, 5); |
| |
| c->fft128.fft_permute(&c->fft128, (FFTComplex*)src); |
| c->fft128.fft_permute(&c->fft128, (FFTComplex*)(src + 128)); |
| c->fft128.fft_permute(&c->fft128, (FFTComplex*)(src + 256)); |
| c->fft128.fft_permute(&c->fft128, (FFTComplex*)(src + 384)); |
| c->fft128.fft_calc(&c->fft128, (FFTComplex*)src); |
| c->fft128.fft_calc(&c->fft128, (FFTComplex*)(src + 128)); |
| c->fft128.fft_calc(&c->fft128, (FFTComplex*)(src + 256)); |
| c->fft128.fft_calc(&c->fft128, (FFTComplex*)(src + 384)); |
| combine_fft(src, src + 128, src + 256, src + 384, tmp1, |
| ff_on2avc_ctab_1, ff_on2avc_ctab_2, |
| ff_on2avc_ctab_3, ff_on2avc_ctab_4, 512, 2); |
| c->fft512.fft_permute(&c->fft512, (FFTComplex*)tmp1); |
| c->fft512.fft_calc(&c->fft512, (FFTComplex*)tmp1); |
| |
| pretwiddle(&tmp0[ 0], tmp1, 512, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1); |
| pretwiddle(&tmp0[128], tmp1, 512, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2); |
| pretwiddle(&tmp0[256], tmp1, 512, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3); |
| pretwiddle(&tmp0[384], tmp1, 512, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4); |
| |
| memcpy(src, tmp1, 512 * sizeof(float)); |
| } |
| |
| static void wtf_end_1024(On2AVCContext *c, float *out, float *src, |
| float *tmp0, float *tmp1) |
| { |
| memcpy(src, tmp0, 768 * sizeof(*tmp0)); |
| memcpy(tmp0 + 768, src + 768, 256 * sizeof(*tmp0)); |
| |
| zero_head_and_tail(src, 256, 16, 4); |
| zero_head_and_tail(src + 256, 256, 16, 4); |
| zero_head_and_tail(src + 512, 256, 13, 7); |
| zero_head_and_tail(src + 768, 256, 15, 5); |
| |
| c->fft256.fft_permute(&c->fft256, (FFTComplex*)src); |
| c->fft256.fft_permute(&c->fft256, (FFTComplex*)(src + 256)); |
| c->fft256.fft_permute(&c->fft256, (FFTComplex*)(src + 512)); |
| c->fft256.fft_permute(&c->fft256, (FFTComplex*)(src + 768)); |
| c->fft256.fft_calc(&c->fft256, (FFTComplex*)src); |
| c->fft256.fft_calc(&c->fft256, (FFTComplex*)(src + 256)); |
| c->fft256.fft_calc(&c->fft256, (FFTComplex*)(src + 512)); |
| c->fft256.fft_calc(&c->fft256, (FFTComplex*)(src + 768)); |
| combine_fft(src, src + 256, src + 512, src + 768, tmp1, |
| ff_on2avc_ctab_1, ff_on2avc_ctab_2, |
| ff_on2avc_ctab_3, ff_on2avc_ctab_4, 1024, 1); |
| c->fft1024.fft_permute(&c->fft1024, (FFTComplex*)tmp1); |
| c->fft1024.fft_calc(&c->fft1024, (FFTComplex*)tmp1); |
| |
| pretwiddle(&tmp0[ 0], tmp1, 1024, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1); |
| pretwiddle(&tmp0[256], tmp1, 1024, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2); |
| pretwiddle(&tmp0[512], tmp1, 1024, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3); |
| pretwiddle(&tmp0[768], tmp1, 1024, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4); |
| |
| memcpy(src, tmp1, 1024 * sizeof(float)); |
| } |
| |
| static void wtf_40(On2AVCContext *c, float *out, float *src, int size) |
| { |
| float *tmp0 = c->temp, *tmp1 = c->temp + 1024; |
| |
| memset(tmp0, 0, sizeof(*tmp0) * 1024); |
| memset(tmp1, 0, sizeof(*tmp1) * 1024); |
| |
| if (size == 512) { |
| twiddle(src, &tmp0[ 0], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1); |
| twiddle(src + 8, &tmp0[ 0], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2); |
| twiddle(src + 16, &tmp0[ 16], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2); |
| twiddle(src + 24, &tmp0[ 16], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1); |
| twiddle(src + 32, &tmp0[ 32], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1); |
| twiddle(src + 40, &tmp0[ 32], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2); |
| twiddle(src + 48, &tmp0[ 48], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2); |
| twiddle(src + 56, &tmp0[ 48], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1); |
| twiddle(&tmp0[ 0], &tmp1[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(&tmp0[16], &tmp1[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(&tmp0[32], &tmp1[ 32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(&tmp0[48], &tmp1[ 32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(src + 64, &tmp1[ 64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(src + 80, &tmp1[ 64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(src + 96, &tmp1[ 96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(src + 112, &tmp1[ 96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(src + 128, &tmp1[128], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(src + 144, &tmp1[128], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(src + 160, &tmp1[160], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(src + 176, &tmp1[160], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| |
| memset(tmp0, 0, 64 * sizeof(*tmp0)); |
| |
| twiddle(&tmp1[ 0], &tmp0[ 0], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1); |
| twiddle(&tmp1[ 32], &tmp0[ 0], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2); |
| twiddle(&tmp1[ 64], &tmp0[ 0], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3); |
| twiddle(&tmp1[ 96], &tmp0[ 0], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4); |
| twiddle(&tmp1[128], &tmp0[128], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4); |
| twiddle(&tmp1[160], &tmp0[128], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3); |
| twiddle(src + 192, &tmp0[128], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2); |
| twiddle(src + 224, &tmp0[128], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1); |
| twiddle(src + 256, &tmp0[256], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1); |
| twiddle(src + 288, &tmp0[256], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2); |
| twiddle(src + 320, &tmp0[256], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3); |
| twiddle(src + 352, &tmp0[256], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4); |
| |
| wtf_end_512(c, out, src, tmp0, tmp1); |
| } else { |
| twiddle(src, &tmp0[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(src + 16, &tmp0[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(src + 32, &tmp0[ 32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(src + 48, &tmp0[ 32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(src + 64, &tmp0[ 64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(src + 80, &tmp0[ 64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(src + 96, &tmp0[ 96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(src + 112, &tmp0[ 96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(&tmp0[ 0], &tmp1[ 0], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1); |
| twiddle(&tmp0[32], &tmp1[ 0], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2); |
| twiddle(&tmp0[64], &tmp1[ 64], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2); |
| twiddle(&tmp0[96], &tmp1[ 64], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1); |
| twiddle(src + 128, &tmp1[128], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1); |
| twiddle(src + 160, &tmp1[128], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2); |
| twiddle(src + 192, &tmp1[192], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2); |
| twiddle(src + 224, &tmp1[192], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1); |
| twiddle(src + 256, &tmp1[256], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1); |
| twiddle(src + 288, &tmp1[256], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2); |
| twiddle(src + 320, &tmp1[320], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2); |
| twiddle(src + 352, &tmp1[320], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1); |
| |
| memset(tmp0, 0, 128 * sizeof(*tmp0)); |
| |
| twiddle(&tmp1[ 0], &tmp0[ 0], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1); |
| twiddle(&tmp1[ 64], &tmp0[ 0], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2); |
| twiddle(&tmp1[128], &tmp0[ 0], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3); |
| twiddle(&tmp1[192], &tmp0[ 0], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4); |
| twiddle(&tmp1[256], &tmp0[256], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4); |
| twiddle(&tmp1[320], &tmp0[256], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3); |
| twiddle(src + 384, &tmp0[256], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2); |
| twiddle(src + 448, &tmp0[256], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1); |
| twiddle(src + 512, &tmp0[512], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1); |
| twiddle(src + 576, &tmp0[512], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2); |
| twiddle(src + 640, &tmp0[512], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3); |
| twiddle(src + 704, &tmp0[512], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4); |
| |
| wtf_end_1024(c, out, src, tmp0, tmp1); |
| } |
| } |
| |
| static void wtf_44(On2AVCContext *c, float *out, float *src, int size) |
| { |
| float *tmp0 = c->temp, *tmp1 = c->temp + 1024; |
| |
| memset(tmp0, 0, sizeof(*tmp0) * 1024); |
| memset(tmp1, 0, sizeof(*tmp1) * 1024); |
| |
| if (size == 512) { |
| twiddle(src, &tmp0[ 0], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1); |
| twiddle(src + 8, &tmp0[ 0], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2); |
| twiddle(src + 16, &tmp0[16], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2); |
| twiddle(src + 24, &tmp0[16], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1); |
| twiddle(src + 32, &tmp0[32], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1); |
| twiddle(src + 40, &tmp0[32], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2); |
| twiddle(src + 48, &tmp0[48], 16, ff_on2avc_tab_10_2, 10, 2, 3, 1, ff_on2avc_tabs_4_10_2); |
| twiddle(src + 56, &tmp0[48], 16, ff_on2avc_tab_10_1, 10, 2, 1, 3, ff_on2avc_tabs_4_10_1); |
| twiddle(&tmp0[ 0], &tmp1[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(&tmp0[16], &tmp1[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(&tmp0[32], &tmp1[32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(&tmp0[48], &tmp1[32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(src + 64, &tmp1[64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(src + 80, &tmp1[64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(src + 96, &tmp1[96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(src + 112, &tmp1[96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| |
| memset(tmp0, 0, 64 * sizeof(*tmp0)); |
| |
| twiddle(&tmp1[ 0], &tmp0[ 0], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1); |
| twiddle(&tmp1[32], &tmp0[ 0], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2); |
| twiddle(&tmp1[64], &tmp0[ 0], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3); |
| twiddle(&tmp1[96], &tmp0[ 0], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4); |
| twiddle(src + 128, &tmp0[128], 128, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4); |
| twiddle(src + 160, &tmp0[128], 128, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3); |
| twiddle(src + 192, &tmp0[128], 128, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2); |
| twiddle(src + 224, &tmp0[128], 128, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1); |
| twiddle(src + 256, &tmp0[256], 128, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1); |
| twiddle(src + 320, &tmp0[256], 128, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2); |
| |
| wtf_end_512(c, out, src, tmp0, tmp1); |
| } else { |
| twiddle(src, &tmp0[ 0], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(src + 16, &tmp0[ 0], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(src + 32, &tmp0[ 32], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(src + 48, &tmp0[ 32], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(src + 64, &tmp0[ 64], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(src + 80, &tmp0[ 64], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(src + 96, &tmp0[ 96], 32, ff_on2avc_tab_20_2, 20, 2, 4, 5, ff_on2avc_tabs_9_20_2); |
| twiddle(src + 112, &tmp0[ 96], 32, ff_on2avc_tab_20_1, 20, 2, 5, 4, ff_on2avc_tabs_9_20_1); |
| twiddle(&tmp0[ 0], &tmp1[ 0], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1); |
| twiddle(&tmp0[32], &tmp1[ 0], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2); |
| twiddle(&tmp0[64], &tmp1[ 64], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2); |
| twiddle(&tmp0[96], &tmp1[ 64], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1); |
| twiddle(src + 128, &tmp1[128], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1); |
| twiddle(src + 160, &tmp1[128], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2); |
| twiddle(src + 192, &tmp1[192], 64, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2); |
| twiddle(src + 224, &tmp1[192], 64, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1); |
| |
| memset(tmp0, 0, 128 * sizeof(*tmp0)); |
| |
| twiddle(&tmp1[ 0], &tmp0[ 0], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1); |
| twiddle(&tmp1[ 64], &tmp0[ 0], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2); |
| twiddle(&tmp1[128], &tmp0[ 0], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3); |
| twiddle(&tmp1[192], &tmp0[ 0], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4); |
| twiddle(src + 256, &tmp0[256], 256, ff_on2avc_tab_84_4, 84, 4, 15, 5, ff_on2avc_tabs_20_84_4); |
| twiddle(src + 320, &tmp0[256], 256, ff_on2avc_tab_84_3, 84, 4, 13, 7, ff_on2avc_tabs_20_84_3); |
| twiddle(src + 384, &tmp0[256], 256, ff_on2avc_tab_84_2, 84, 4, 16, 4, ff_on2avc_tabs_20_84_2); |
| twiddle(src + 448, &tmp0[256], 256, ff_on2avc_tab_84_1, 84, 4, 16, 4, ff_on2avc_tabs_20_84_1); |
| twiddle(src + 512, &tmp0[512], 256, ff_on2avc_tab_40_1, 40, 2, 11, 8, ff_on2avc_tabs_19_40_1); |
| twiddle(src + 640, &tmp0[512], 256, ff_on2avc_tab_40_2, 40, 2, 8, 11, ff_on2avc_tabs_19_40_2); |
| |
| wtf_end_1024(c, out, src, tmp0, tmp1); |
| } |
| } |
| |
| static int on2avc_reconstruct_channel_ext(On2AVCContext *c, AVFrame *dst, int offset) |
| { |
| int ch, i; |
| |
| for (ch = 0; ch < c->avctx->channels; ch++) { |
| float *out = (float*)dst->extended_data[ch] + offset; |
| float *in = c->coeffs[ch]; |
| float *saved = c->delay[ch]; |
| float *buf = c->mdct_buf; |
| float *wout = out + 448; |
| |
| switch (c->window_type) { |
| case WINDOW_TYPE_EXT7: |
| c->mdct.imdct_half(&c->mdct, buf, in); |
| break; |
| case WINDOW_TYPE_EXT4: |
| c->wtf(c, buf, in, 1024); |
| break; |
| case WINDOW_TYPE_EXT5: |
| c->wtf(c, buf, in, 512); |
| c->mdct.imdct_half(&c->mdct_half, buf + 512, in + 512); |
| for (i = 0; i < 256; i++) { |
| FFSWAP(float, buf[i + 512], buf[1023 - i]); |
| } |
| break; |
| case WINDOW_TYPE_EXT6: |
| c->mdct.imdct_half(&c->mdct_half, buf, in); |
| for (i = 0; i < 256; i++) { |
| FFSWAP(float, buf[i], buf[511 - i]); |
| } |
| c->wtf(c, buf + 512, in + 512, 512); |
| break; |
| } |
| |
| memcpy(out, saved, 448 * sizeof(float)); |
| c->fdsp->vector_fmul_window(wout, saved + 448, buf, c->short_win, 64); |
| memcpy(wout + 128, buf + 64, 448 * sizeof(float)); |
| memcpy(saved, buf + 512, 448 * sizeof(float)); |
| memcpy(saved + 448, buf + 7*128 + 64, 64 * sizeof(float)); |
| } |
| |
| return 0; |
| } |
| |
| // not borrowed from aacdec.c - the codec has original design after all |
| static int on2avc_reconstruct_channel(On2AVCContext *c, int channel, |
| AVFrame *dst, int offset) |
| { |
| int i; |
| float *out = (float*)dst->extended_data[channel] + offset; |
| float *in = c->coeffs[channel]; |
| float *saved = c->delay[channel]; |
| float *buf = c->mdct_buf; |
| float *temp = c->temp; |
| |
| switch (c->window_type) { |
| case WINDOW_TYPE_LONG_START: |
| case WINDOW_TYPE_LONG_STOP: |
| case WINDOW_TYPE_LONG: |
| c->mdct.imdct_half(&c->mdct, buf, in); |
| break; |
| case WINDOW_TYPE_8SHORT: |
| for (i = 0; i < ON2AVC_SUBFRAME_SIZE; i += ON2AVC_SUBFRAME_SIZE / 8) |
| c->mdct_small.imdct_half(&c->mdct_small, buf + i, in + i); |
| break; |
| } |
| |
| if ((c->prev_window_type == WINDOW_TYPE_LONG || |
| c->prev_window_type == WINDOW_TYPE_LONG_STOP) && |
| (c->window_type == WINDOW_TYPE_LONG || |
| c->window_type == WINDOW_TYPE_LONG_START)) { |
| c->fdsp->vector_fmul_window(out, saved, buf, c->long_win, 512); |
| } else { |
| float *wout = out + 448; |
| memcpy(out, saved, 448 * sizeof(float)); |
| |
| if (c->window_type == WINDOW_TYPE_8SHORT) { |
| c->fdsp->vector_fmul_window(wout + 0*128, saved + 448, buf + 0*128, c->short_win, 64); |
| c->fdsp->vector_fmul_window(wout + 1*128, buf + 0*128 + 64, buf + 1*128, c->short_win, 64); |
| c->fdsp->vector_fmul_window(wout + 2*128, buf + 1*128 + 64, buf + 2*128, c->short_win, 64); |
| c->fdsp->vector_fmul_window(wout + 3*128, buf + 2*128 + 64, buf + 3*128, c->short_win, 64); |
| c->fdsp->vector_fmul_window(temp, buf + 3*128 + 64, buf + 4*128, c->short_win, 64); |
| memcpy(wout + 4*128, temp, 64 * sizeof(float)); |
| } else { |
| c->fdsp->vector_fmul_window(wout, saved + 448, buf, c->short_win, 64); |
| memcpy(wout + 128, buf + 64, 448 * sizeof(float)); |
| } |
| } |
| |
| // buffer update |
| switch (c->window_type) { |
| case WINDOW_TYPE_8SHORT: |
| memcpy(saved, temp + 64, 64 * sizeof(float)); |
| c->fdsp->vector_fmul_window(saved + 64, buf + 4*128 + 64, buf + 5*128, c->short_win, 64); |
| c->fdsp->vector_fmul_window(saved + 192, buf + 5*128 + 64, buf + 6*128, c->short_win, 64); |
| c->fdsp->vector_fmul_window(saved + 320, buf + 6*128 + 64, buf + 7*128, c->short_win, 64); |
| memcpy(saved + 448, buf + 7*128 + 64, 64 * sizeof(float)); |
| break; |
| case WINDOW_TYPE_LONG_START: |
| memcpy(saved, buf + 512, 448 * sizeof(float)); |
| memcpy(saved + 448, buf + 7*128 + 64, 64 * sizeof(float)); |
| break; |
| case WINDOW_TYPE_LONG_STOP: |
| case WINDOW_TYPE_LONG: |
| memcpy(saved, buf + 512, 512 * sizeof(float)); |
| break; |
| } |
| return 0; |
| } |
| |
| static int on2avc_decode_subframe(On2AVCContext *c, const uint8_t *buf, |
| int buf_size, AVFrame *dst, int offset) |
| { |
| GetBitContext gb; |
| int i, ret; |
| |
| if ((ret = init_get_bits8(&gb, buf, buf_size)) < 0) |
| return ret; |
| |
| if (get_bits1(&gb)) { |
| av_log(c->avctx, AV_LOG_ERROR, "enh bit set\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| c->prev_window_type = c->window_type; |
| c->window_type = get_bits(&gb, 3); |
| |
| c->band_start = c->modes[c->window_type].band_start; |
| c->num_windows = c->modes[c->window_type].num_windows; |
| c->num_bands = c->modes[c->window_type].num_bands; |
| c->is_long = (c->window_type != WINDOW_TYPE_8SHORT); |
| |
| c->grouping[0] = 1; |
| for (i = 1; i < c->num_windows; i++) |
| c->grouping[i] = !get_bits1(&gb); |
| |
| on2avc_read_ms_info(c, &gb); |
| for (i = 0; i < c->avctx->channels; i++) |
| if ((ret = on2avc_read_channel_data(c, &gb, i)) < 0) |
| return AVERROR_INVALIDDATA; |
| if (c->avctx->channels == 2 && c->ms_present) |
| on2avc_apply_ms(c); |
| if (c->window_type < WINDOW_TYPE_EXT4) { |
| for (i = 0; i < c->avctx->channels; i++) |
| on2avc_reconstruct_channel(c, i, dst, offset); |
| } else { |
| on2avc_reconstruct_channel_ext(c, dst, offset); |
| } |
| |
| return 0; |
| } |
| |
| static int on2avc_decode_frame(AVCodecContext * avctx, void *data, |
| int *got_frame_ptr, AVPacket *avpkt) |
| { |
| AVFrame *frame = data; |
| const uint8_t *buf = avpkt->data; |
| int buf_size = avpkt->size; |
| On2AVCContext *c = avctx->priv_data; |
| GetByteContext gb; |
| int num_frames = 0, frame_size, audio_off; |
| int ret; |
| |
| if (c->is_av500) { |
| /* get output buffer */ |
| frame->nb_samples = ON2AVC_SUBFRAME_SIZE; |
| if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| return ret; |
| |
| if ((ret = on2avc_decode_subframe(c, buf, buf_size, frame, 0)) < 0) |
| return ret; |
| } else { |
| bytestream2_init(&gb, buf, buf_size); |
| while (bytestream2_get_bytes_left(&gb) > 2) { |
| frame_size = bytestream2_get_le16(&gb); |
| if (!frame_size || frame_size > bytestream2_get_bytes_left(&gb)) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid subframe size %d\n", |
| frame_size); |
| return AVERROR_INVALIDDATA; |
| } |
| num_frames++; |
| bytestream2_skip(&gb, frame_size); |
| } |
| if (!num_frames) { |
| av_log(avctx, AV_LOG_ERROR, "No subframes present\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| /* get output buffer */ |
| frame->nb_samples = ON2AVC_SUBFRAME_SIZE * num_frames; |
| if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| return ret; |
| |
| audio_off = 0; |
| bytestream2_init(&gb, buf, buf_size); |
| while (bytestream2_get_bytes_left(&gb) > 2) { |
| frame_size = bytestream2_get_le16(&gb); |
| if ((ret = on2avc_decode_subframe(c, gb.buffer, frame_size, |
| frame, audio_off)) < 0) |
| return ret; |
| audio_off += ON2AVC_SUBFRAME_SIZE; |
| bytestream2_skip(&gb, frame_size); |
| } |
| } |
| |
| *got_frame_ptr = 1; |
| |
| return buf_size; |
| } |
| |
| static av_cold void on2avc_free_vlcs(On2AVCContext *c) |
| { |
| int i; |
| |
| ff_free_vlc(&c->scale_diff); |
| for (i = 1; i < 16; i++) |
| ff_free_vlc(&c->cb_vlc[i]); |
| } |
| |
| static av_cold int on2avc_decode_init(AVCodecContext *avctx) |
| { |
| On2AVCContext *c = avctx->priv_data; |
| const uint8_t *lens = ff_on2avc_cb_lens; |
| const uint16_t *syms = ff_on2avc_cb_syms; |
| int i, ret; |
| |
| if (avctx->channels > 2U) { |
| avpriv_request_sample(avctx, "Decoding more than 2 channels"); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| c->avctx = avctx; |
| avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; |
| avctx->channel_layout = (avctx->channels == 2) ? AV_CH_LAYOUT_STEREO |
| : AV_CH_LAYOUT_MONO; |
| |
| c->is_av500 = (avctx->codec_tag == 0x500); |
| |
| if (avctx->channels == 2) |
| av_log(avctx, AV_LOG_WARNING, |
| "Stereo mode support is not good, patch is welcome\n"); |
| |
| // We add -0.01 before ceil() to avoid any values to fall at exactly the |
| // midpoint between different ceil values. The results are identical to |
| // using pow(10, i / 10.0) without such bias |
| for (i = 0; i < 20; i++) |
| c->scale_tab[i] = ceil(ff_exp10(i * 0.1) * 16 - 0.01) / 32; |
| for (; i < 128; i++) |
| c->scale_tab[i] = ceil(ff_exp10(i * 0.1) * 0.5 - 0.01); |
| |
| if (avctx->sample_rate < 32000 || avctx->channels == 1) |
| memcpy(c->long_win, ff_on2avc_window_long_24000, |
| 1024 * sizeof(*c->long_win)); |
| else |
| memcpy(c->long_win, ff_on2avc_window_long_32000, |
| 1024 * sizeof(*c->long_win)); |
| memcpy(c->short_win, ff_on2avc_window_short, 128 * sizeof(*c->short_win)); |
| |
| c->modes = (avctx->sample_rate <= 40000) ? ff_on2avc_modes_40 |
| : ff_on2avc_modes_44; |
| c->wtf = (avctx->sample_rate <= 40000) ? wtf_40 |
| : wtf_44; |
| |
| ff_mdct_init(&c->mdct, 11, 1, 1.0 / (32768.0 * 1024.0)); |
| ff_mdct_init(&c->mdct_half, 10, 1, 1.0 / (32768.0 * 512.0)); |
| ff_mdct_init(&c->mdct_small, 8, 1, 1.0 / (32768.0 * 128.0)); |
| ff_fft_init(&c->fft128, 6, 0); |
| ff_fft_init(&c->fft256, 7, 0); |
| ff_fft_init(&c->fft512, 8, 1); |
| ff_fft_init(&c->fft1024, 9, 1); |
| c->fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT); |
| if (!c->fdsp) |
| return AVERROR(ENOMEM); |
| |
| ret = ff_init_vlc_from_lengths(&c->scale_diff, 9, ON2AVC_SCALE_DIFFS, |
| ff_on2avc_scale_diff_bits, 1, |
| ff_on2avc_scale_diff_syms, 1, 1, -60, 0, avctx); |
| if (ret < 0) |
| goto vlc_fail; |
| for (i = 1; i < 16; i++) { |
| int idx = i - 1; |
| ret = ff_init_vlc_from_lengths(&c->cb_vlc[i], 9, ff_on2avc_cb_elems[idx], |
| lens, 1, |
| syms, 2, 2, 0, 0, avctx); |
| if (ret < 0) |
| goto vlc_fail; |
| lens += ff_on2avc_cb_elems[idx]; |
| syms += ff_on2avc_cb_elems[idx]; |
| } |
| |
| return 0; |
| vlc_fail: |
| av_log(avctx, AV_LOG_ERROR, "Cannot init VLC\n"); |
| return ret; |
| } |
| |
| static av_cold int on2avc_decode_close(AVCodecContext *avctx) |
| { |
| On2AVCContext *c = avctx->priv_data; |
| |
| ff_mdct_end(&c->mdct); |
| ff_mdct_end(&c->mdct_half); |
| ff_mdct_end(&c->mdct_small); |
| ff_fft_end(&c->fft128); |
| ff_fft_end(&c->fft256); |
| ff_fft_end(&c->fft512); |
| ff_fft_end(&c->fft1024); |
| |
| av_freep(&c->fdsp); |
| |
| on2avc_free_vlcs(c); |
| |
| return 0; |
| } |
| |
| |
| AVCodec ff_on2avc_decoder = { |
| .name = "on2avc", |
| .long_name = NULL_IF_CONFIG_SMALL("On2 Audio for Video Codec"), |
| .type = AVMEDIA_TYPE_AUDIO, |
| .id = AV_CODEC_ID_ON2AVC, |
| .priv_data_size = sizeof(On2AVCContext), |
| .init = on2avc_decode_init, |
| .decode = on2avc_decode_frame, |
| .close = on2avc_decode_close, |
| .capabilities = AV_CODEC_CAP_DR1, |
| .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, |
| .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, |
| AV_SAMPLE_FMT_NONE }, |
| }; |
