| /* |
| * TAK decoder |
| * Copyright (c) 2012 Paul B Mahol |
| * |
| * 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 |
| * TAK (Tom's lossless Audio Kompressor) decoder |
| * @author Paul B Mahol |
| */ |
| |
| #include "libavutil/internal.h" |
| #include "libavutil/samplefmt.h" |
| |
| #define BITSTREAM_READER_LE |
| #include "audiodsp.h" |
| #include "thread.h" |
| #include "avcodec.h" |
| #include "internal.h" |
| #include "unary.h" |
| #include "tak.h" |
| #include "takdsp.h" |
| |
| #define MAX_SUBFRAMES 8 ///< max number of subframes per channel |
| #define MAX_PREDICTORS 256 |
| |
| typedef struct MCDParam { |
| int8_t present; ///< decorrelation parameter availability for this channel |
| int8_t index; ///< index into array of decorrelation types |
| int8_t chan1; |
| int8_t chan2; |
| } MCDParam; |
| |
| typedef struct TAKDecContext { |
| AVCodecContext *avctx; ///< parent AVCodecContext |
| AudioDSPContext adsp; |
| TAKDSPContext tdsp; |
| TAKStreamInfo ti; |
| GetBitContext gb; ///< bitstream reader initialized to start at the current frame |
| |
| int uval; |
| int nb_samples; ///< number of samples in the current frame |
| uint8_t *decode_buffer; |
| unsigned int decode_buffer_size; |
| int32_t *decoded[TAK_MAX_CHANNELS]; ///< decoded samples for each channel |
| |
| int8_t lpc_mode[TAK_MAX_CHANNELS]; |
| int8_t sample_shift[TAK_MAX_CHANNELS]; ///< shift applied to every sample in the channel |
| int16_t predictors[MAX_PREDICTORS]; |
| int nb_subframes; ///< number of subframes in the current frame |
| int16_t subframe_len[MAX_SUBFRAMES]; ///< subframe length in samples |
| int subframe_scale; |
| |
| int8_t dmode; ///< channel decorrelation type in the current frame |
| |
| MCDParam mcdparams[TAK_MAX_CHANNELS]; ///< multichannel decorrelation parameters |
| |
| int8_t coding_mode[128]; |
| DECLARE_ALIGNED(16, int16_t, filter)[MAX_PREDICTORS]; |
| DECLARE_ALIGNED(16, int16_t, residues)[544]; |
| } TAKDecContext; |
| |
| static const int8_t mc_dmodes[] = { 1, 3, 4, 6, }; |
| |
| static const uint16_t predictor_sizes[] = { |
| 4, 8, 12, 16, 24, 32, 48, 64, 80, 96, 128, 160, 192, 224, 256, 0, |
| }; |
| |
| static const struct CParam { |
| int init; |
| int escape; |
| int scale; |
| int aescape; |
| int bias; |
| } xcodes[50] = { |
| { 0x01, 0x0000001, 0x0000001, 0x0000003, 0x0000008 }, |
| { 0x02, 0x0000003, 0x0000001, 0x0000007, 0x0000006 }, |
| { 0x03, 0x0000005, 0x0000002, 0x000000E, 0x000000D }, |
| { 0x03, 0x0000003, 0x0000003, 0x000000D, 0x0000018 }, |
| { 0x04, 0x000000B, 0x0000004, 0x000001C, 0x0000019 }, |
| { 0x04, 0x0000006, 0x0000006, 0x000001A, 0x0000030 }, |
| { 0x05, 0x0000016, 0x0000008, 0x0000038, 0x0000032 }, |
| { 0x05, 0x000000C, 0x000000C, 0x0000034, 0x0000060 }, |
| { 0x06, 0x000002C, 0x0000010, 0x0000070, 0x0000064 }, |
| { 0x06, 0x0000018, 0x0000018, 0x0000068, 0x00000C0 }, |
| { 0x07, 0x0000058, 0x0000020, 0x00000E0, 0x00000C8 }, |
| { 0x07, 0x0000030, 0x0000030, 0x00000D0, 0x0000180 }, |
| { 0x08, 0x00000B0, 0x0000040, 0x00001C0, 0x0000190 }, |
| { 0x08, 0x0000060, 0x0000060, 0x00001A0, 0x0000300 }, |
| { 0x09, 0x0000160, 0x0000080, 0x0000380, 0x0000320 }, |
| { 0x09, 0x00000C0, 0x00000C0, 0x0000340, 0x0000600 }, |
| { 0x0A, 0x00002C0, 0x0000100, 0x0000700, 0x0000640 }, |
| { 0x0A, 0x0000180, 0x0000180, 0x0000680, 0x0000C00 }, |
| { 0x0B, 0x0000580, 0x0000200, 0x0000E00, 0x0000C80 }, |
| { 0x0B, 0x0000300, 0x0000300, 0x0000D00, 0x0001800 }, |
| { 0x0C, 0x0000B00, 0x0000400, 0x0001C00, 0x0001900 }, |
| { 0x0C, 0x0000600, 0x0000600, 0x0001A00, 0x0003000 }, |
| { 0x0D, 0x0001600, 0x0000800, 0x0003800, 0x0003200 }, |
| { 0x0D, 0x0000C00, 0x0000C00, 0x0003400, 0x0006000 }, |
| { 0x0E, 0x0002C00, 0x0001000, 0x0007000, 0x0006400 }, |
| { 0x0E, 0x0001800, 0x0001800, 0x0006800, 0x000C000 }, |
| { 0x0F, 0x0005800, 0x0002000, 0x000E000, 0x000C800 }, |
| { 0x0F, 0x0003000, 0x0003000, 0x000D000, 0x0018000 }, |
| { 0x10, 0x000B000, 0x0004000, 0x001C000, 0x0019000 }, |
| { 0x10, 0x0006000, 0x0006000, 0x001A000, 0x0030000 }, |
| { 0x11, 0x0016000, 0x0008000, 0x0038000, 0x0032000 }, |
| { 0x11, 0x000C000, 0x000C000, 0x0034000, 0x0060000 }, |
| { 0x12, 0x002C000, 0x0010000, 0x0070000, 0x0064000 }, |
| { 0x12, 0x0018000, 0x0018000, 0x0068000, 0x00C0000 }, |
| { 0x13, 0x0058000, 0x0020000, 0x00E0000, 0x00C8000 }, |
| { 0x13, 0x0030000, 0x0030000, 0x00D0000, 0x0180000 }, |
| { 0x14, 0x00B0000, 0x0040000, 0x01C0000, 0x0190000 }, |
| { 0x14, 0x0060000, 0x0060000, 0x01A0000, 0x0300000 }, |
| { 0x15, 0x0160000, 0x0080000, 0x0380000, 0x0320000 }, |
| { 0x15, 0x00C0000, 0x00C0000, 0x0340000, 0x0600000 }, |
| { 0x16, 0x02C0000, 0x0100000, 0x0700000, 0x0640000 }, |
| { 0x16, 0x0180000, 0x0180000, 0x0680000, 0x0C00000 }, |
| { 0x17, 0x0580000, 0x0200000, 0x0E00000, 0x0C80000 }, |
| { 0x17, 0x0300000, 0x0300000, 0x0D00000, 0x1800000 }, |
| { 0x18, 0x0B00000, 0x0400000, 0x1C00000, 0x1900000 }, |
| { 0x18, 0x0600000, 0x0600000, 0x1A00000, 0x3000000 }, |
| { 0x19, 0x1600000, 0x0800000, 0x3800000, 0x3200000 }, |
| { 0x19, 0x0C00000, 0x0C00000, 0x3400000, 0x6000000 }, |
| { 0x1A, 0x2C00000, 0x1000000, 0x7000000, 0x6400000 }, |
| { 0x1A, 0x1800000, 0x1800000, 0x6800000, 0xC000000 }, |
| }; |
| |
| static int set_bps_params(AVCodecContext *avctx) |
| { |
| switch (avctx->bits_per_raw_sample) { |
| case 8: |
| avctx->sample_fmt = AV_SAMPLE_FMT_U8P; |
| break; |
| case 16: |
| avctx->sample_fmt = AV_SAMPLE_FMT_S16P; |
| break; |
| case 24: |
| avctx->sample_fmt = AV_SAMPLE_FMT_S32P; |
| break; |
| default: |
| av_log(avctx, AV_LOG_ERROR, "invalid/unsupported bits per sample: %d\n", |
| avctx->bits_per_raw_sample); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| return 0; |
| } |
| |
| static void set_sample_rate_params(AVCodecContext *avctx) |
| { |
| TAKDecContext *s = avctx->priv_data; |
| int shift; |
| |
| if (avctx->sample_rate < 11025) { |
| shift = 3; |
| } else if (avctx->sample_rate < 22050) { |
| shift = 2; |
| } else if (avctx->sample_rate < 44100) { |
| shift = 1; |
| } else { |
| shift = 0; |
| } |
| s->uval = FFALIGN(avctx->sample_rate + 511LL >> 9, 4) << shift; |
| s->subframe_scale = FFALIGN(avctx->sample_rate + 511LL >> 9, 4) << 1; |
| } |
| |
| static av_cold int tak_decode_init(AVCodecContext *avctx) |
| { |
| TAKDecContext *s = avctx->priv_data; |
| |
| ff_audiodsp_init(&s->adsp); |
| ff_takdsp_init(&s->tdsp); |
| |
| s->avctx = avctx; |
| avctx->bits_per_raw_sample = avctx->bits_per_coded_sample; |
| |
| set_sample_rate_params(avctx); |
| |
| return set_bps_params(avctx); |
| } |
| |
| static void decode_lpc(int32_t *coeffs, int mode, int length) |
| { |
| int i; |
| |
| if (length < 2) |
| return; |
| |
| if (mode == 1) { |
| unsigned a1 = *coeffs++; |
| for (i = 0; i < length - 1 >> 1; i++) { |
| *coeffs += a1; |
| coeffs[1] += (unsigned)*coeffs; |
| a1 = coeffs[1]; |
| coeffs += 2; |
| } |
| if (length - 1 & 1) |
| *coeffs += a1; |
| } else if (mode == 2) { |
| unsigned a1 = coeffs[1]; |
| unsigned a2 = a1 + *coeffs; |
| coeffs[1] = a2; |
| if (length > 2) { |
| coeffs += 2; |
| for (i = 0; i < length - 2 >> 1; i++) { |
| unsigned a3 = *coeffs + a1; |
| unsigned a4 = a3 + a2; |
| *coeffs = a4; |
| a1 = coeffs[1] + a3; |
| a2 = a1 + a4; |
| coeffs[1] = a2; |
| coeffs += 2; |
| } |
| if (length & 1) |
| *coeffs += a1 + a2; |
| } |
| } else if (mode == 3) { |
| unsigned a1 = coeffs[1]; |
| unsigned a2 = a1 + *coeffs; |
| coeffs[1] = a2; |
| if (length > 2) { |
| unsigned a3 = coeffs[2]; |
| unsigned a4 = a3 + a1; |
| unsigned a5 = a4 + a2; |
| coeffs[2] = a5; |
| coeffs += 3; |
| for (i = 0; i < length - 3; i++) { |
| a3 += *coeffs; |
| a4 += a3; |
| a5 += a4; |
| *coeffs = a5; |
| coeffs++; |
| } |
| } |
| } |
| } |
| |
| static int decode_segment(TAKDecContext *s, int8_t mode, int32_t *decoded, int len) |
| { |
| struct CParam code; |
| GetBitContext *gb = &s->gb; |
| int i; |
| |
| if (!mode) { |
| memset(decoded, 0, len * sizeof(*decoded)); |
| return 0; |
| } |
| |
| if (mode > FF_ARRAY_ELEMS(xcodes)) |
| return AVERROR_INVALIDDATA; |
| code = xcodes[mode - 1]; |
| |
| for (i = 0; i < len; i++) { |
| unsigned x = get_bits_long(gb, code.init); |
| if (x >= code.escape && get_bits1(gb)) { |
| x |= 1 << code.init; |
| if (x >= code.aescape) { |
| unsigned scale = get_unary(gb, 1, 9); |
| if (scale == 9) { |
| int scale_bits = get_bits(gb, 3); |
| if (scale_bits > 0) { |
| if (scale_bits == 7) { |
| scale_bits += get_bits(gb, 5); |
| if (scale_bits > 29) |
| return AVERROR_INVALIDDATA; |
| } |
| scale = get_bits_long(gb, scale_bits) + 1; |
| x += code.scale * scale; |
| } |
| x += code.bias; |
| } else |
| x += code.scale * scale - code.escape; |
| } else |
| x -= code.escape; |
| } |
| decoded[i] = (x >> 1) ^ -(x & 1); |
| } |
| |
| return 0; |
| } |
| |
| static int decode_residues(TAKDecContext *s, int32_t *decoded, int length) |
| { |
| GetBitContext *gb = &s->gb; |
| int i, mode, ret; |
| |
| if (length > s->nb_samples) |
| return AVERROR_INVALIDDATA; |
| |
| if (get_bits1(gb)) { |
| int wlength, rval; |
| |
| wlength = length / s->uval; |
| |
| rval = length - (wlength * s->uval); |
| |
| if (rval < s->uval / 2) |
| rval += s->uval; |
| else |
| wlength++; |
| |
| if (wlength <= 1 || wlength > 128) |
| return AVERROR_INVALIDDATA; |
| |
| s->coding_mode[0] = mode = get_bits(gb, 6); |
| |
| for (i = 1; i < wlength; i++) { |
| int c = get_unary(gb, 1, 6); |
| |
| switch (c) { |
| case 6: |
| mode = get_bits(gb, 6); |
| break; |
| case 5: |
| case 4: |
| case 3: { |
| /* mode += sign ? (1 - c) : (c - 1) */ |
| int sign = get_bits1(gb); |
| mode += (-sign ^ (c - 1)) + sign; |
| break; |
| } |
| case 2: |
| mode++; |
| break; |
| case 1: |
| mode--; |
| break; |
| } |
| s->coding_mode[i] = mode; |
| } |
| |
| i = 0; |
| while (i < wlength) { |
| int len = 0; |
| |
| mode = s->coding_mode[i]; |
| do { |
| if (i >= wlength - 1) |
| len += rval; |
| else |
| len += s->uval; |
| i++; |
| |
| if (i == wlength) |
| break; |
| } while (s->coding_mode[i] == mode); |
| |
| if ((ret = decode_segment(s, mode, decoded, len)) < 0) |
| return ret; |
| decoded += len; |
| } |
| } else { |
| mode = get_bits(gb, 6); |
| if ((ret = decode_segment(s, mode, decoded, length)) < 0) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int get_bits_esc4(GetBitContext *gb) |
| { |
| if (get_bits1(gb)) |
| return get_bits(gb, 4) + 1; |
| else |
| return 0; |
| } |
| |
| static int decode_subframe(TAKDecContext *s, int32_t *decoded, |
| int subframe_size, int prev_subframe_size) |
| { |
| GetBitContext *gb = &s->gb; |
| int x, y, i, j, ret = 0; |
| int dshift, size, filter_quant, filter_order; |
| int tfilter[MAX_PREDICTORS]; |
| |
| if (!get_bits1(gb)) |
| return decode_residues(s, decoded, subframe_size); |
| |
| filter_order = predictor_sizes[get_bits(gb, 4)]; |
| |
| if (prev_subframe_size > 0 && get_bits1(gb)) { |
| if (filter_order > prev_subframe_size) |
| return AVERROR_INVALIDDATA; |
| |
| decoded -= filter_order; |
| subframe_size += filter_order; |
| |
| if (filter_order > subframe_size) |
| return AVERROR_INVALIDDATA; |
| } else { |
| int lpc_mode; |
| |
| if (filter_order > subframe_size) |
| return AVERROR_INVALIDDATA; |
| |
| lpc_mode = get_bits(gb, 2); |
| if (lpc_mode > 2) |
| return AVERROR_INVALIDDATA; |
| |
| if ((ret = decode_residues(s, decoded, filter_order)) < 0) |
| return ret; |
| |
| if (lpc_mode) |
| decode_lpc(decoded, lpc_mode, filter_order); |
| } |
| |
| dshift = get_bits_esc4(gb); |
| size = get_bits1(gb) + 6; |
| |
| filter_quant = 10; |
| if (get_bits1(gb)) { |
| filter_quant -= get_bits(gb, 3) + 1; |
| if (filter_quant < 3) |
| return AVERROR_INVALIDDATA; |
| } |
| |
| s->predictors[0] = get_sbits(gb, 10); |
| s->predictors[1] = get_sbits(gb, 10); |
| s->predictors[2] = get_sbits(gb, size) * (1 << (10 - size)); |
| s->predictors[3] = get_sbits(gb, size) * (1 << (10 - size)); |
| if (filter_order > 4) { |
| int tmp = size - get_bits1(gb); |
| |
| for (i = 4; i < filter_order; i++) { |
| if (!(i & 3)) |
| x = tmp - get_bits(gb, 2); |
| s->predictors[i] = get_sbits(gb, x) * (1 << (10 - size)); |
| } |
| } |
| |
| tfilter[0] = s->predictors[0] * 64; |
| for (i = 1; i < filter_order; i++) { |
| uint32_t *p1 = &tfilter[0]; |
| uint32_t *p2 = &tfilter[i - 1]; |
| |
| for (j = 0; j < (i + 1) / 2; j++) { |
| x = *p1 + ((int32_t)(s->predictors[i] * *p2 + 256) >> 9); |
| *p2 += (int32_t)(s->predictors[i] * *p1 + 256) >> 9; |
| *p1++ = x; |
| p2--; |
| } |
| |
| tfilter[i] = s->predictors[i] * 64; |
| } |
| |
| x = 1 << (32 - (15 - filter_quant)); |
| y = 1 << ((15 - filter_quant) - 1); |
| for (i = 0, j = filter_order - 1; i < filter_order / 2; i++, j--) { |
| s->filter[j] = x - ((tfilter[i] + y) >> (15 - filter_quant)); |
| s->filter[i] = x - ((tfilter[j] + y) >> (15 - filter_quant)); |
| } |
| |
| if ((ret = decode_residues(s, &decoded[filter_order], |
| subframe_size - filter_order)) < 0) |
| return ret; |
| |
| for (i = 0; i < filter_order; i++) |
| s->residues[i] = *decoded++ >> dshift; |
| |
| y = FF_ARRAY_ELEMS(s->residues) - filter_order; |
| x = subframe_size - filter_order; |
| while (x > 0) { |
| int tmp = FFMIN(y, x); |
| |
| for (i = 0; i < tmp; i++) { |
| int v = 1 << (filter_quant - 1); |
| |
| if (filter_order & -16) |
| v += (unsigned)s->adsp.scalarproduct_int16(&s->residues[i], s->filter, |
| filter_order & -16); |
| for (j = filter_order & -16; j < filter_order; j += 4) { |
| v += s->residues[i + j + 3] * (unsigned)s->filter[j + 3] + |
| s->residues[i + j + 2] * (unsigned)s->filter[j + 2] + |
| s->residues[i + j + 1] * (unsigned)s->filter[j + 1] + |
| s->residues[i + j ] * (unsigned)s->filter[j ]; |
| } |
| v = (av_clip_intp2(v >> filter_quant, 13) * (1 << dshift)) - (unsigned)*decoded; |
| *decoded++ = v; |
| s->residues[filter_order + i] = v >> dshift; |
| } |
| |
| x -= tmp; |
| if (x > 0) |
| memcpy(s->residues, &s->residues[y], 2 * filter_order); |
| } |
| |
| emms_c(); |
| |
| return 0; |
| } |
| |
| static int decode_channel(TAKDecContext *s, int chan) |
| { |
| AVCodecContext *avctx = s->avctx; |
| GetBitContext *gb = &s->gb; |
| int32_t *decoded = s->decoded[chan]; |
| int left = s->nb_samples - 1; |
| int i = 0, ret, prev = 0; |
| |
| s->sample_shift[chan] = get_bits_esc4(gb); |
| if (s->sample_shift[chan] >= avctx->bits_per_raw_sample) |
| return AVERROR_INVALIDDATA; |
| |
| *decoded++ = get_sbits(gb, avctx->bits_per_raw_sample - s->sample_shift[chan]); |
| s->lpc_mode[chan] = get_bits(gb, 2); |
| s->nb_subframes = get_bits(gb, 3) + 1; |
| |
| if (s->nb_subframes > 1) { |
| if (get_bits_left(gb) < (s->nb_subframes - 1) * 6) |
| return AVERROR_INVALIDDATA; |
| |
| for (; i < s->nb_subframes - 1; i++) { |
| int v = get_bits(gb, 6); |
| |
| s->subframe_len[i] = (v - prev) * s->subframe_scale; |
| if (s->subframe_len[i] <= 0) |
| return AVERROR_INVALIDDATA; |
| |
| left -= s->subframe_len[i]; |
| prev = v; |
| } |
| |
| if (left <= 0) |
| return AVERROR_INVALIDDATA; |
| } |
| s->subframe_len[i] = left; |
| |
| prev = 0; |
| for (i = 0; i < s->nb_subframes; i++) { |
| if ((ret = decode_subframe(s, decoded, s->subframe_len[i], prev)) < 0) |
| return ret; |
| decoded += s->subframe_len[i]; |
| prev = s->subframe_len[i]; |
| } |
| |
| return 0; |
| } |
| |
| static int decorrelate(TAKDecContext *s, int c1, int c2, int length) |
| { |
| GetBitContext *gb = &s->gb; |
| int32_t *p1 = s->decoded[c1] + (s->dmode > 5); |
| int32_t *p2 = s->decoded[c2] + (s->dmode > 5); |
| int32_t bp1 = p1[0]; |
| int32_t bp2 = p2[0]; |
| int i; |
| int dshift, dfactor; |
| |
| length += s->dmode < 6; |
| |
| switch (s->dmode) { |
| case 1: /* left/side */ |
| s->tdsp.decorrelate_ls(p1, p2, length); |
| break; |
| case 2: /* side/right */ |
| s->tdsp.decorrelate_sr(p1, p2, length); |
| break; |
| case 3: /* side/mid */ |
| s->tdsp.decorrelate_sm(p1, p2, length); |
| break; |
| case 4: /* side/left with scale factor */ |
| FFSWAP(int32_t*, p1, p2); |
| FFSWAP(int32_t, bp1, bp2); |
| case 5: /* side/right with scale factor */ |
| dshift = get_bits_esc4(gb); |
| dfactor = get_sbits(gb, 10); |
| s->tdsp.decorrelate_sf(p1, p2, length, dshift, dfactor); |
| break; |
| case 6: |
| FFSWAP(int32_t*, p1, p2); |
| case 7: { |
| int length2, order_half, filter_order, dval1, dval2; |
| int tmp, x, code_size; |
| |
| if (length < 256) |
| return AVERROR_INVALIDDATA; |
| |
| dshift = get_bits_esc4(gb); |
| filter_order = 8 << get_bits1(gb); |
| dval1 = get_bits1(gb); |
| dval2 = get_bits1(gb); |
| |
| for (i = 0; i < filter_order; i++) { |
| if (!(i & 3)) |
| code_size = 14 - get_bits(gb, 3); |
| s->filter[i] = get_sbits(gb, code_size); |
| } |
| |
| order_half = filter_order / 2; |
| length2 = length - (filter_order - 1); |
| |
| /* decorrelate beginning samples */ |
| if (dval1) { |
| for (i = 0; i < order_half; i++) { |
| int32_t a = p1[i]; |
| int32_t b = p2[i]; |
| p1[i] = a + b; |
| } |
| } |
| |
| /* decorrelate ending samples */ |
| if (dval2) { |
| for (i = length2 + order_half; i < length; i++) { |
| int32_t a = p1[i]; |
| int32_t b = p2[i]; |
| p1[i] = a + b; |
| } |
| } |
| |
| |
| for (i = 0; i < filter_order; i++) |
| s->residues[i] = *p2++ >> dshift; |
| |
| p1 += order_half; |
| x = FF_ARRAY_ELEMS(s->residues) - filter_order; |
| for (; length2 > 0; length2 -= tmp) { |
| tmp = FFMIN(length2, x); |
| |
| for (i = 0; i < tmp - (tmp == length2); i++) |
| s->residues[filter_order + i] = *p2++ >> dshift; |
| |
| for (i = 0; i < tmp; i++) { |
| int v = 1 << 9; |
| |
| if (filter_order == 16) { |
| v += s->adsp.scalarproduct_int16(&s->residues[i], s->filter, |
| filter_order); |
| } else { |
| v += s->residues[i + 7] * s->filter[7] + |
| s->residues[i + 6] * s->filter[6] + |
| s->residues[i + 5] * s->filter[5] + |
| s->residues[i + 4] * s->filter[4] + |
| s->residues[i + 3] * s->filter[3] + |
| s->residues[i + 2] * s->filter[2] + |
| s->residues[i + 1] * s->filter[1] + |
| s->residues[i ] * s->filter[0]; |
| } |
| |
| v = av_clip_intp2(v >> 10, 13) * (1U << dshift) - *p1; |
| *p1++ = v; |
| } |
| |
| memmove(s->residues, &s->residues[tmp], 2 * filter_order); |
| } |
| |
| emms_c(); |
| break; |
| } |
| } |
| |
| if (s->dmode > 0 && s->dmode < 6) { |
| p1[0] = bp1; |
| p2[0] = bp2; |
| } |
| |
| return 0; |
| } |
| |
| static int tak_decode_frame(AVCodecContext *avctx, void *data, |
| int *got_frame_ptr, AVPacket *pkt) |
| { |
| TAKDecContext *s = avctx->priv_data; |
| AVFrame *frame = data; |
| ThreadFrame tframe = { .f = data }; |
| GetBitContext *gb = &s->gb; |
| int chan, i, ret, hsize; |
| |
| if (pkt->size < TAK_MIN_FRAME_HEADER_BYTES) |
| return AVERROR_INVALIDDATA; |
| |
| if ((ret = init_get_bits8(gb, pkt->data, pkt->size)) < 0) |
| return ret; |
| |
| if ((ret = ff_tak_decode_frame_header(avctx, gb, &s->ti, 0)) < 0) |
| return ret; |
| |
| hsize = get_bits_count(gb) / 8; |
| if (avctx->err_recognition & (AV_EF_CRCCHECK|AV_EF_COMPLIANT)) { |
| if (ff_tak_check_crc(pkt->data, hsize)) { |
| av_log(avctx, AV_LOG_ERROR, "CRC error\n"); |
| if (avctx->err_recognition & AV_EF_EXPLODE) |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| |
| if (s->ti.codec != TAK_CODEC_MONO_STEREO && |
| s->ti.codec != TAK_CODEC_MULTICHANNEL) { |
| avpriv_report_missing_feature(avctx, "TAK codec type %d", s->ti.codec); |
| return AVERROR_PATCHWELCOME; |
| } |
| if (s->ti.data_type) { |
| av_log(avctx, AV_LOG_ERROR, |
| "unsupported data type: %d\n", s->ti.data_type); |
| return AVERROR_INVALIDDATA; |
| } |
| if (s->ti.codec == TAK_CODEC_MONO_STEREO && s->ti.channels > 2) { |
| av_log(avctx, AV_LOG_ERROR, |
| "invalid number of channels: %d\n", s->ti.channels); |
| return AVERROR_INVALIDDATA; |
| } |
| if (s->ti.channels > 6) { |
| av_log(avctx, AV_LOG_ERROR, |
| "unsupported number of channels: %d\n", s->ti.channels); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (s->ti.frame_samples <= 0) { |
| av_log(avctx, AV_LOG_ERROR, "unsupported/invalid number of samples\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| avctx->bits_per_raw_sample = s->ti.bps; |
| if ((ret = set_bps_params(avctx)) < 0) |
| return ret; |
| if (s->ti.sample_rate != avctx->sample_rate) { |
| avctx->sample_rate = s->ti.sample_rate; |
| set_sample_rate_params(avctx); |
| } |
| if (s->ti.ch_layout) |
| avctx->channel_layout = s->ti.ch_layout; |
| avctx->channels = s->ti.channels; |
| |
| s->nb_samples = s->ti.last_frame_samples ? s->ti.last_frame_samples |
| : s->ti.frame_samples; |
| |
| frame->nb_samples = s->nb_samples; |
| if ((ret = ff_thread_get_buffer(avctx, &tframe, 0)) < 0) |
| return ret; |
| ff_thread_finish_setup(avctx); |
| |
| if (avctx->bits_per_raw_sample <= 16) { |
| int buf_size = av_samples_get_buffer_size(NULL, avctx->channels, |
| s->nb_samples, |
| AV_SAMPLE_FMT_S32P, 0); |
| if (buf_size < 0) |
| return buf_size; |
| av_fast_malloc(&s->decode_buffer, &s->decode_buffer_size, buf_size); |
| if (!s->decode_buffer) |
| return AVERROR(ENOMEM); |
| ret = av_samples_fill_arrays((uint8_t **)s->decoded, NULL, |
| s->decode_buffer, avctx->channels, |
| s->nb_samples, AV_SAMPLE_FMT_S32P, 0); |
| if (ret < 0) |
| return ret; |
| } else { |
| for (chan = 0; chan < avctx->channels; chan++) |
| s->decoded[chan] = (int32_t *)frame->extended_data[chan]; |
| } |
| |
| if (s->nb_samples < 16) { |
| for (chan = 0; chan < avctx->channels; chan++) { |
| int32_t *decoded = s->decoded[chan]; |
| for (i = 0; i < s->nb_samples; i++) |
| decoded[i] = get_sbits(gb, avctx->bits_per_raw_sample); |
| } |
| } else { |
| if (s->ti.codec == TAK_CODEC_MONO_STEREO) { |
| for (chan = 0; chan < avctx->channels; chan++) |
| if (ret = decode_channel(s, chan)) |
| return ret; |
| |
| if (avctx->channels == 2) { |
| s->nb_subframes = get_bits(gb, 1) + 1; |
| if (s->nb_subframes > 1) { |
| s->subframe_len[1] = get_bits(gb, 6); |
| } |
| |
| s->dmode = get_bits(gb, 3); |
| if (ret = decorrelate(s, 0, 1, s->nb_samples - 1)) |
| return ret; |
| } |
| } else if (s->ti.codec == TAK_CODEC_MULTICHANNEL) { |
| if (get_bits1(gb)) { |
| int ch_mask = 0; |
| |
| chan = get_bits(gb, 4) + 1; |
| if (chan > avctx->channels) |
| return AVERROR_INVALIDDATA; |
| |
| for (i = 0; i < chan; i++) { |
| int nbit = get_bits(gb, 4); |
| |
| if (nbit >= avctx->channels) |
| return AVERROR_INVALIDDATA; |
| |
| if (ch_mask & 1 << nbit) |
| return AVERROR_INVALIDDATA; |
| |
| s->mcdparams[i].present = get_bits1(gb); |
| if (s->mcdparams[i].present) { |
| s->mcdparams[i].index = get_bits(gb, 2); |
| s->mcdparams[i].chan2 = get_bits(gb, 4); |
| if (s->mcdparams[i].chan2 >= avctx->channels) { |
| av_log(avctx, AV_LOG_ERROR, |
| "invalid channel 2 (%d) for %d channel(s)\n", |
| s->mcdparams[i].chan2, avctx->channels); |
| return AVERROR_INVALIDDATA; |
| } |
| if (s->mcdparams[i].index == 1) { |
| if ((nbit == s->mcdparams[i].chan2) || |
| (ch_mask & 1 << s->mcdparams[i].chan2)) |
| return AVERROR_INVALIDDATA; |
| |
| ch_mask |= 1 << s->mcdparams[i].chan2; |
| } else if (!(ch_mask & 1 << s->mcdparams[i].chan2)) { |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| s->mcdparams[i].chan1 = nbit; |
| |
| ch_mask |= 1 << nbit; |
| } |
| } else { |
| chan = avctx->channels; |
| for (i = 0; i < chan; i++) { |
| s->mcdparams[i].present = 0; |
| s->mcdparams[i].chan1 = i; |
| } |
| } |
| |
| for (i = 0; i < chan; i++) { |
| if (s->mcdparams[i].present && s->mcdparams[i].index == 1) |
| if (ret = decode_channel(s, s->mcdparams[i].chan2)) |
| return ret; |
| |
| if (ret = decode_channel(s, s->mcdparams[i].chan1)) |
| return ret; |
| |
| if (s->mcdparams[i].present) { |
| s->dmode = mc_dmodes[s->mcdparams[i].index]; |
| if (ret = decorrelate(s, |
| s->mcdparams[i].chan2, |
| s->mcdparams[i].chan1, |
| s->nb_samples - 1)) |
| return ret; |
| } |
| } |
| } |
| |
| for (chan = 0; chan < avctx->channels; chan++) { |
| int32_t *decoded = s->decoded[chan]; |
| |
| if (s->lpc_mode[chan]) |
| decode_lpc(decoded, s->lpc_mode[chan], s->nb_samples); |
| |
| if (s->sample_shift[chan] > 0) |
| for (i = 0; i < s->nb_samples; i++) |
| decoded[i] *= 1U << s->sample_shift[chan]; |
| } |
| } |
| |
| align_get_bits(gb); |
| skip_bits(gb, 24); |
| if (get_bits_left(gb) < 0) |
| av_log(avctx, AV_LOG_DEBUG, "overread\n"); |
| else if (get_bits_left(gb) > 0) |
| av_log(avctx, AV_LOG_DEBUG, "underread\n"); |
| |
| if (avctx->err_recognition & (AV_EF_CRCCHECK | AV_EF_COMPLIANT)) { |
| if (ff_tak_check_crc(pkt->data + hsize, |
| get_bits_count(gb) / 8 - hsize)) { |
| av_log(avctx, AV_LOG_ERROR, "CRC error\n"); |
| if (avctx->err_recognition & AV_EF_EXPLODE) |
| return AVERROR_INVALIDDATA; |
| } |
| } |
| |
| /* convert to output buffer */ |
| switch (avctx->sample_fmt) { |
| case AV_SAMPLE_FMT_U8P: |
| for (chan = 0; chan < avctx->channels; chan++) { |
| uint8_t *samples = (uint8_t *)frame->extended_data[chan]; |
| int32_t *decoded = s->decoded[chan]; |
| for (i = 0; i < s->nb_samples; i++) |
| samples[i] = decoded[i] + 0x80U; |
| } |
| break; |
| case AV_SAMPLE_FMT_S16P: |
| for (chan = 0; chan < avctx->channels; chan++) { |
| int16_t *samples = (int16_t *)frame->extended_data[chan]; |
| int32_t *decoded = s->decoded[chan]; |
| for (i = 0; i < s->nb_samples; i++) |
| samples[i] = decoded[i]; |
| } |
| break; |
| case AV_SAMPLE_FMT_S32P: |
| for (chan = 0; chan < avctx->channels; chan++) { |
| int32_t *samples = (int32_t *)frame->extended_data[chan]; |
| for (i = 0; i < s->nb_samples; i++) |
| samples[i] *= 1U << 8; |
| } |
| break; |
| } |
| |
| *got_frame_ptr = 1; |
| |
| return pkt->size; |
| } |
| |
| #if HAVE_THREADS |
| static int update_thread_context(AVCodecContext *dst, |
| const AVCodecContext *src) |
| { |
| TAKDecContext *tsrc = src->priv_data; |
| TAKDecContext *tdst = dst->priv_data; |
| |
| if (dst == src) |
| return 0; |
| memcpy(&tdst->ti, &tsrc->ti, sizeof(TAKStreamInfo)); |
| return 0; |
| } |
| #endif |
| |
| static av_cold int tak_decode_close(AVCodecContext *avctx) |
| { |
| TAKDecContext *s = avctx->priv_data; |
| |
| av_freep(&s->decode_buffer); |
| |
| return 0; |
| } |
| |
| AVCodec ff_tak_decoder = { |
| .name = "tak", |
| .long_name = NULL_IF_CONFIG_SMALL("TAK (Tom's lossless Audio Kompressor)"), |
| .type = AVMEDIA_TYPE_AUDIO, |
| .id = AV_CODEC_ID_TAK, |
| .priv_data_size = sizeof(TAKDecContext), |
| .init = tak_decode_init, |
| .close = tak_decode_close, |
| .decode = tak_decode_frame, |
| .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context), |
| .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS, |
| .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P, |
| AV_SAMPLE_FMT_S16P, |
| AV_SAMPLE_FMT_S32P, |
| AV_SAMPLE_FMT_NONE }, |
| }; |
