diff options
Diffstat (limited to 'libavcodec/on2avc.c')
| -rw-r--r-- | libavcodec/on2avc.c | 1015 |
1 files changed, 1015 insertions, 0 deletions
diff --git a/libavcodec/on2avc.c b/libavcodec/on2avc.c new file mode 100644 index 0000000000..9378391f83 --- /dev/null +++ b/libavcodec/on2avc.c @@ -0,0 +1,1015 @@ +/* + * 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/float_dsp.h" +#include "avcodec.h" +#include "bytestream.h" +#include "dsputil.h" +#include "fft.h" +#include "get_bits.h" +#include "golomb.h" +#include "internal.h" +#include "unary.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); + run_len += run; + } while (run == esc_val); + if (band + run_len > num_bands) { + av_log(c->avctx, AV_LOG_ERROR, "Invalid band type run\n"); + return AVERROR_INVALIDDATA; + } + 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) - 60; + } + if (scale < 0 || scale > 128) { + 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(fabsf(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, 3); + + 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++; + + return (1 << v) + get_bits(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, 3); + + 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 **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 **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_stereo(On2AVCContext *c, AVFrame *dst, int offset) +{ + int ch, i; + + for (ch = 0; ch < 2; 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; + + init_get_bits(&gb, buf, buf_size * 8); + 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); + if (c->window_type >= WINDOW_TYPE_EXT4 && c->avctx->channels == 1) { + av_log(c->avctx, AV_LOG_ERROR, "stereo mode window for mono audio\n"); + return AVERROR_INVALIDDATA; + } + + 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_stereo(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) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + 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) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + 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; + int i; + + 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 (c->is_av500 && avctx->channels == 2) { + av_log(avctx, AV_LOG_ERROR, "0x500 version should be mono\n"); + return AVERROR_INVALIDDATA; + } + if (avctx->channels == 2) + av_log(avctx, AV_LOG_WARNING, + "Stereo mode support is not good, patch is welcome\n"); + + for (i = 0; i < 20; i++) + c->scale_tab[i] = ceil(pow(10.0, i * 0.1) * 16) / 32; + for (; i < 128; i++) + c->scale_tab[i] = ceil(pow(10.0, i * 0.1) * 0.5); + + 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); + avpriv_float_dsp_init(&c->fdsp, avctx->flags & CODEC_FLAG_BITEXACT); + + if (init_vlc(&c->scale_diff, 9, ON2AVC_SCALE_DIFFS, + ff_on2avc_scale_diff_bits, 1, 1, + ff_on2avc_scale_diff_codes, 4, 4, 0)) { + av_log(avctx, AV_LOG_ERROR, "Cannot init VLC\n"); + return AVERROR(ENOMEM); + } + for (i = 1; i < 9; i++) { + int idx = i - 1; + if (ff_init_vlc_sparse(&c->cb_vlc[i], 9, ff_on2avc_quad_cb_elems[idx], + ff_on2avc_quad_cb_bits[idx], 1, 1, + ff_on2avc_quad_cb_codes[idx], 4, 4, + ff_on2avc_quad_cb_syms[idx], 2, 2, 0)) { + av_log(avctx, AV_LOG_ERROR, "Cannot init VLC\n"); + on2avc_free_vlcs(c); + return AVERROR(ENOMEM); + } + } + for (i = 9; i < 16; i++) { + int idx = i - 9; + if (ff_init_vlc_sparse(&c->cb_vlc[i], 9, ff_on2avc_pair_cb_elems[idx], + ff_on2avc_pair_cb_bits[idx], 1, 1, + ff_on2avc_pair_cb_codes[idx], 2, 2, + ff_on2avc_pair_cb_syms[idx], 2, 2, 0)) { + av_log(avctx, AV_LOG_ERROR, "Cannot init VLC\n"); + on2avc_free_vlcs(c); + return AVERROR(ENOMEM); + } + } + + return 0; +} + +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); + + 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 = CODEC_CAP_DR1, + .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, + AV_SAMPLE_FMT_NONE }, +}; |