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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * WavPack lossless audio decoder |
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| 3 | * Copyright (c) 2006,2011 Konstantin Shishkov |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | #define BITSTREAM_READER_LE |
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| 23 | |||
| 24 | #include "libavutil/channel_layout.h" |
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| 25 | #include "avcodec.h" |
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| 26 | #include "get_bits.h" |
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| 27 | #include "internal.h" |
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| 28 | #include "thread.h" |
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| 29 | #include "unary.h" |
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| 30 | #include "bytestream.h" |
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| 31 | #include "wavpack.h" |
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| 32 | |||
| 33 | /** |
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| 34 | * @file |
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| 35 | * WavPack lossless audio decoder |
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| 36 | */ |
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| 37 | |||
| 38 | typedef struct SavedContext { |
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| 39 | int offset; |
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| 40 | int size; |
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| 41 | int bits_used; |
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| 42 | uint32_t crc; |
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| 43 | } SavedContext; |
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| 44 | |||
| 45 | typedef struct WavpackFrameContext { |
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| 46 | AVCodecContext *avctx; |
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| 47 | int frame_flags; |
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| 48 | int stereo, stereo_in; |
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| 49 | int joint; |
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| 50 | uint32_t CRC; |
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| 51 | GetBitContext gb; |
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| 52 | int got_extra_bits; |
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| 53 | uint32_t crc_extra_bits; |
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| 54 | GetBitContext gb_extra_bits; |
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| 55 | int data_size; // in bits |
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| 56 | int samples; |
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| 57 | int terms; |
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| 58 | Decorr decorr[MAX_TERMS]; |
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| 59 | int zero, one, zeroes; |
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| 60 | int extra_bits; |
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| 61 | int and, or, shift; |
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| 62 | int post_shift; |
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| 63 | int hybrid, hybrid_bitrate; |
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| 64 | int hybrid_maxclip, hybrid_minclip; |
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| 65 | int float_flag; |
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| 66 | int float_shift; |
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| 67 | int float_max_exp; |
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| 68 | WvChannel ch[2]; |
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| 69 | int pos; |
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| 70 | SavedContext sc, extra_sc; |
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| 71 | } WavpackFrameContext; |
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| 72 | |||
| 73 | #define WV_MAX_FRAME_DECODERS 14 |
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| 74 | |||
| 75 | typedef struct WavpackContext { |
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| 76 | AVCodecContext *avctx; |
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| 77 | |||
| 78 | WavpackFrameContext *fdec[WV_MAX_FRAME_DECODERS]; |
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| 79 | int fdec_num; |
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| 80 | |||
| 81 | int block; |
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| 82 | int samples; |
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| 83 | int ch_offset; |
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| 84 | } WavpackContext; |
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| 85 | |||
| 86 | #define LEVEL_DECAY(a) ((a + 0x80) >> 8) |
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| 87 | |||
| 88 | static av_always_inline int get_tail(GetBitContext *gb, int k) |
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| 89 | { |
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| 90 | int p, e, res; |
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| 91 | |||
| 92 | if (k < 1) |
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| 93 | return 0; |
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| 94 | p = av_log2(k); |
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| 95 | e = (1 << (p + 1)) - k - 1; |
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| 96 | res = p ? get_bits(gb, p) : 0; |
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| 97 | if (res >= e) |
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| 98 | res = (res << 1) - e + get_bits1(gb); |
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| 99 | return res; |
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| 100 | } |
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| 101 | |||
| 102 | static void update_error_limit(WavpackFrameContext *ctx) |
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| 103 | { |
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| 104 | int i, br[2], sl[2]; |
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| 105 | |||
| 106 | for (i = 0; i <= ctx->stereo_in; i++) { |
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| 107 | ctx->ch[i].bitrate_acc += ctx->ch[i].bitrate_delta; |
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| 108 | br[i] = ctx->ch[i].bitrate_acc >> 16; |
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| 109 | sl[i] = LEVEL_DECAY(ctx->ch[i].slow_level); |
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| 110 | } |
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| 111 | if (ctx->stereo_in && ctx->hybrid_bitrate) { |
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| 112 | int balance = (sl[1] - sl[0] + br[1] + 1) >> 1; |
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| 113 | if (balance > br[0]) { |
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| 114 | br[1] = br[0] << 1; |
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| 115 | br[0] = 0; |
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| 116 | } else if (-balance > br[0]) { |
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| 117 | br[0] <<= 1; |
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| 118 | br[1] = 0; |
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| 119 | } else { |
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| 120 | br[1] = br[0] + balance; |
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| 121 | br[0] = br[0] - balance; |
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| 122 | } |
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| 123 | } |
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| 124 | for (i = 0; i <= ctx->stereo_in; i++) { |
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| 125 | if (ctx->hybrid_bitrate) { |
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| 126 | if (sl[i] - br[i] > -0x100) |
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| 127 | ctx->ch[i].error_limit = wp_exp2(sl[i] - br[i] + 0x100); |
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| 128 | else |
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| 129 | ctx->ch[i].error_limit = 0; |
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| 130 | } else { |
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| 131 | ctx->ch[i].error_limit = wp_exp2(br[i]); |
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| 132 | } |
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| 133 | } |
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| 134 | } |
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| 135 | |||
| 136 | static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb, |
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| 137 | int channel, int *last) |
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| 138 | { |
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| 139 | int t, t2; |
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| 140 | int sign, base, add, ret; |
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| 141 | WvChannel *c = &ctx->ch[channel]; |
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| 142 | |||
| 143 | *last = 0; |
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| 144 | |||
| 145 | if ((ctx->ch[0].median[0] < 2U) && (ctx->ch[1].median[0] < 2U) && |
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| 146 | !ctx->zero && !ctx->one) { |
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| 147 | if (ctx->zeroes) { |
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| 148 | ctx->zeroes--; |
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| 149 | if (ctx->zeroes) { |
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| 150 | c->slow_level -= LEVEL_DECAY(c->slow_level); |
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| 151 | return 0; |
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| 152 | } |
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| 153 | } else { |
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| 154 | t = get_unary_0_33(gb); |
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| 155 | if (t >= 2) { |
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| 156 | if (get_bits_left(gb) < t - 1) |
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| 157 | goto error; |
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| 158 | t = get_bits(gb, t - 1) | (1 << (t - 1)); |
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| 159 | } else { |
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| 160 | if (get_bits_left(gb) < 0) |
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| 161 | goto error; |
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| 162 | } |
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| 163 | ctx->zeroes = t; |
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| 164 | if (ctx->zeroes) { |
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| 165 | memset(ctx->ch[0].median, 0, sizeof(ctx->ch[0].median)); |
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| 166 | memset(ctx->ch[1].median, 0, sizeof(ctx->ch[1].median)); |
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| 167 | c->slow_level -= LEVEL_DECAY(c->slow_level); |
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| 168 | return 0; |
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| 169 | } |
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| 170 | } |
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| 171 | } |
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| 172 | |||
| 173 | if (ctx->zero) { |
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| 174 | t = 0; |
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| 175 | ctx->zero = 0; |
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| 176 | } else { |
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| 177 | t = get_unary_0_33(gb); |
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| 178 | if (get_bits_left(gb) < 0) |
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| 179 | goto error; |
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| 180 | if (t == 16) { |
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| 181 | t2 = get_unary_0_33(gb); |
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| 182 | if (t2 < 2) { |
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| 183 | if (get_bits_left(gb) < 0) |
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| 184 | goto error; |
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| 185 | t += t2; |
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| 186 | } else { |
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| 187 | if (get_bits_left(gb) < t2 - 1) |
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| 188 | goto error; |
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| 189 | t += get_bits(gb, t2 - 1) | (1 << (t2 - 1)); |
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| 190 | } |
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| 191 | } |
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| 192 | |||
| 193 | if (ctx->one) { |
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| 194 | ctx->one = t & 1; |
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| 195 | t = (t >> 1) + 1; |
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| 196 | } else { |
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| 197 | ctx->one = t & 1; |
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| 198 | t >>= 1; |
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| 199 | } |
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| 200 | ctx->zero = !ctx->one; |
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| 201 | } |
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| 202 | |||
| 203 | if (ctx->hybrid && !channel) |
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| 204 | update_error_limit(ctx); |
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| 205 | |||
| 206 | if (!t) { |
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| 207 | base = 0; |
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| 208 | add = GET_MED(0) - 1; |
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| 209 | DEC_MED(0); |
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| 210 | } else if (t == 1) { |
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| 211 | base = GET_MED(0); |
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| 212 | add = GET_MED(1) - 1; |
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| 213 | INC_MED(0); |
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| 214 | DEC_MED(1); |
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| 215 | } else if (t == 2) { |
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| 216 | base = GET_MED(0) + GET_MED(1); |
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| 217 | add = GET_MED(2) - 1; |
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| 218 | INC_MED(0); |
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| 219 | INC_MED(1); |
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| 220 | DEC_MED(2); |
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| 221 | } else { |
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| 222 | base = GET_MED(0) + GET_MED(1) + GET_MED(2) * (t - 2); |
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| 223 | add = GET_MED(2) - 1; |
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| 224 | INC_MED(0); |
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| 225 | INC_MED(1); |
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| 226 | INC_MED(2); |
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| 227 | } |
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| 228 | if (!c->error_limit) { |
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| 229 | if (add >= 0x2000000U) { |
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| 230 | av_log(ctx->avctx, AV_LOG_ERROR, "k %d is too large\n", add); |
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| 231 | goto error; |
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| 232 | } |
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| 233 | ret = base + get_tail(gb, add); |
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| 234 | if (get_bits_left(gb) <= 0) |
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| 235 | goto error; |
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| 236 | } else { |
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| 237 | int mid = (base * 2 + add + 1) >> 1; |
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| 238 | while (add > c->error_limit) { |
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| 239 | if (get_bits_left(gb) <= 0) |
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| 240 | goto error; |
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| 241 | if (get_bits1(gb)) { |
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| 242 | add -= (mid - base); |
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| 243 | base = mid; |
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| 244 | } else |
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| 245 | add = mid - base - 1; |
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| 246 | mid = (base * 2 + add + 1) >> 1; |
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| 247 | } |
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| 248 | ret = mid; |
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| 249 | } |
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| 250 | sign = get_bits1(gb); |
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| 251 | if (ctx->hybrid_bitrate) |
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| 252 | c->slow_level += wp_log2(ret) - LEVEL_DECAY(c->slow_level); |
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| 253 | return sign ? ~ret : ret; |
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| 254 | |||
| 255 | error: |
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| 256 | *last = 1; |
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| 257 | return 0; |
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| 258 | } |
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| 259 | |||
| 260 | static inline int wv_get_value_integer(WavpackFrameContext *s, uint32_t *crc, |
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| 261 | int S) |
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| 262 | { |
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| 263 | int bit; |
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| 264 | |||
| 265 | if (s->extra_bits) { |
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| 266 | S <<= s->extra_bits; |
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| 267 | |||
| 268 | if (s->got_extra_bits && |
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| 269 | get_bits_left(&s->gb_extra_bits) >= s->extra_bits) { |
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| 270 | S |= get_bits(&s->gb_extra_bits, s->extra_bits); |
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| 271 | *crc = *crc * 9 + (S & 0xffff) * 3 + ((unsigned)S >> 16); |
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| 272 | } |
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| 273 | } |
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| 274 | |||
| 275 | bit = (S & s->and) | s->or; |
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| 276 | bit = ((S + bit) << s->shift) - bit; |
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| 277 | |||
| 278 | if (s->hybrid) |
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| 279 | bit = av_clip(bit, s->hybrid_minclip, s->hybrid_maxclip); |
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| 280 | |||
| 281 | return bit << s->post_shift; |
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| 282 | } |
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| 283 | |||
| 284 | static float wv_get_value_float(WavpackFrameContext *s, uint32_t *crc, int S) |
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| 285 | { |
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| 286 | union { |
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| 287 | float f; |
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| 288 | uint32_t u; |
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| 289 | } value; |
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| 290 | |||
| 291 | unsigned int sign; |
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| 292 | int exp = s->float_max_exp; |
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| 293 | |||
| 294 | if (s->got_extra_bits) { |
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| 295 | const int max_bits = 1 + 23 + 8 + 1; |
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| 296 | const int left_bits = get_bits_left(&s->gb_extra_bits); |
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| 297 | |||
| 298 | if (left_bits + 8 * FF_INPUT_BUFFER_PADDING_SIZE < max_bits) |
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| 299 | return 0.0; |
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| 300 | } |
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| 301 | |||
| 302 | if (S) { |
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| 303 | S <<= s->float_shift; |
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| 304 | sign = S < 0; |
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| 305 | if (sign) |
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| 306 | S = -S; |
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| 307 | if (S >= 0x1000000) { |
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| 308 | if (s->got_extra_bits && get_bits1(&s->gb_extra_bits)) |
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| 309 | S = get_bits(&s->gb_extra_bits, 23); |
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| 310 | else |
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| 311 | S = 0; |
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| 312 | exp = 255; |
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| 313 | } else if (exp) { |
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| 314 | int shift = 23 - av_log2(S); |
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| 315 | exp = s->float_max_exp; |
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| 316 | if (exp <= shift) |
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| 317 | shift = --exp; |
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| 318 | exp -= shift; |
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| 319 | |||
| 320 | if (shift) { |
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| 321 | S <<= shift; |
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| 322 | if ((s->float_flag & WV_FLT_SHIFT_ONES) || |
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| 323 | (s->got_extra_bits && |
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| 324 | (s->float_flag & WV_FLT_SHIFT_SAME) && |
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| 325 | get_bits1(&s->gb_extra_bits))) { |
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| 326 | S |= (1 << shift) - 1; |
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| 327 | } else if (s->got_extra_bits && |
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| 328 | (s->float_flag & WV_FLT_SHIFT_SENT)) { |
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| 329 | S |= get_bits(&s->gb_extra_bits, shift); |
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| 330 | } |
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| 331 | } |
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| 332 | } else { |
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| 333 | exp = s->float_max_exp; |
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| 334 | } |
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| 335 | S &= 0x7fffff; |
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| 336 | } else { |
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| 337 | sign = 0; |
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| 338 | exp = 0; |
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| 339 | if (s->got_extra_bits && (s->float_flag & WV_FLT_ZERO_SENT)) { |
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| 340 | if (get_bits1(&s->gb_extra_bits)) { |
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| 341 | S = get_bits(&s->gb_extra_bits, 23); |
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| 342 | if (s->float_max_exp >= 25) |
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| 343 | exp = get_bits(&s->gb_extra_bits, 8); |
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| 344 | sign = get_bits1(&s->gb_extra_bits); |
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| 345 | } else { |
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| 346 | if (s->float_flag & WV_FLT_ZERO_SIGN) |
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| 347 | sign = get_bits1(&s->gb_extra_bits); |
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| 348 | } |
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| 349 | } |
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| 350 | } |
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| 351 | |||
| 352 | *crc = *crc * 27 + S * 9 + exp * 3 + sign; |
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| 353 | |||
| 354 | value.u = (sign << 31) | (exp << 23) | S; |
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| 355 | return value.f; |
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| 356 | } |
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| 357 | |||
| 358 | static void wv_reset_saved_context(WavpackFrameContext *s) |
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| 359 | { |
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| 360 | s->pos = 0; |
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| 361 | s->sc.crc = s->extra_sc.crc = 0xFFFFFFFF; |
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| 362 | } |
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| 363 | |||
| 364 | static inline int wv_check_crc(WavpackFrameContext *s, uint32_t crc, |
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| 365 | uint32_t crc_extra_bits) |
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| 366 | { |
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| 367 | if (crc != s->CRC) { |
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| 368 | av_log(s->avctx, AV_LOG_ERROR, "CRC error\n"); |
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| 369 | return AVERROR_INVALIDDATA; |
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| 370 | } |
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| 371 | if (s->got_extra_bits && crc_extra_bits != s->crc_extra_bits) { |
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| 372 | av_log(s->avctx, AV_LOG_ERROR, "Extra bits CRC error\n"); |
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| 373 | return AVERROR_INVALIDDATA; |
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| 374 | } |
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| 375 | |||
| 376 | return 0; |
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| 377 | } |
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| 378 | |||
| 379 | static inline int wv_unpack_stereo(WavpackFrameContext *s, GetBitContext *gb, |
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| 380 | void *dst_l, void *dst_r, const int type) |
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| 381 | { |
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| 382 | int i, j, count = 0; |
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| 383 | int last, t; |
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| 384 | int A, B, L, L2, R, R2; |
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| 385 | int pos = s->pos; |
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| 386 | uint32_t crc = s->sc.crc; |
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| 387 | uint32_t crc_extra_bits = s->extra_sc.crc; |
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| 388 | int16_t *dst16_l = dst_l; |
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| 389 | int16_t *dst16_r = dst_r; |
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| 390 | int32_t *dst32_l = dst_l; |
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| 391 | int32_t *dst32_r = dst_r; |
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| 392 | float *dstfl_l = dst_l; |
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| 393 | float *dstfl_r = dst_r; |
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| 394 | |||
| 395 | s->one = s->zero = s->zeroes = 0; |
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| 396 | do { |
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| 397 | L = wv_get_value(s, gb, 0, &last); |
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| 398 | if (last) |
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| 399 | break; |
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| 400 | R = wv_get_value(s, gb, 1, &last); |
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| 401 | if (last) |
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| 402 | break; |
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| 403 | for (i = 0; i < s->terms; i++) { |
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| 404 | t = s->decorr[i].value; |
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| 405 | if (t > 0) { |
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| 406 | if (t > 8) { |
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| 407 | if (t & 1) { |
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| 408 | A = 2 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]; |
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| 409 | B = 2 * s->decorr[i].samplesB[0] - s->decorr[i].samplesB[1]; |
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| 410 | } else { |
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| 411 | A = (3 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]) >> 1; |
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| 412 | B = (3 * s->decorr[i].samplesB[0] - s->decorr[i].samplesB[1]) >> 1; |
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| 413 | } |
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| 414 | s->decorr[i].samplesA[1] = s->decorr[i].samplesA[0]; |
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| 415 | s->decorr[i].samplesB[1] = s->decorr[i].samplesB[0]; |
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| 416 | j = 0; |
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| 417 | } else { |
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| 418 | A = s->decorr[i].samplesA[pos]; |
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| 419 | B = s->decorr[i].samplesB[pos]; |
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| 420 | j = (pos + t) & 7; |
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| 421 | } |
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| 422 | if (type != AV_SAMPLE_FMT_S16P) { |
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| 423 | L2 = L + ((s->decorr[i].weightA * (int64_t)A + 512) >> 10); |
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| 424 | R2 = R + ((s->decorr[i].weightB * (int64_t)B + 512) >> 10); |
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| 425 | } else { |
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| 426 | L2 = L + ((s->decorr[i].weightA * A + 512) >> 10); |
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| 427 | R2 = R + ((s->decorr[i].weightB * B + 512) >> 10); |
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| 428 | } |
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| 429 | if (A && L) |
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| 430 | s->decorr[i].weightA -= ((((L ^ A) >> 30) & 2) - 1) * s->decorr[i].delta; |
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| 431 | if (B && R) |
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| 432 | s->decorr[i].weightB -= ((((R ^ B) >> 30) & 2) - 1) * s->decorr[i].delta; |
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| 433 | s->decorr[i].samplesA[j] = L = L2; |
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| 434 | s->decorr[i].samplesB[j] = R = R2; |
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| 435 | } else if (t == -1) { |
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| 436 | if (type != AV_SAMPLE_FMT_S16P) |
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| 437 | L2 = L + ((s->decorr[i].weightA * (int64_t)s->decorr[i].samplesA[0] + 512) >> 10); |
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| 438 | else |
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| 439 | L2 = L + ((s->decorr[i].weightA * s->decorr[i].samplesA[0] + 512) >> 10); |
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| 440 | UPDATE_WEIGHT_CLIP(s->decorr[i].weightA, s->decorr[i].delta, s->decorr[i].samplesA[0], L); |
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| 441 | L = L2; |
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| 442 | if (type != AV_SAMPLE_FMT_S16P) |
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| 443 | R2 = R + ((s->decorr[i].weightB * (int64_t)L2 + 512) >> 10); |
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| 444 | else |
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| 445 | R2 = R + ((s->decorr[i].weightB * L2 + 512) >> 10); |
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| 446 | UPDATE_WEIGHT_CLIP(s->decorr[i].weightB, s->decorr[i].delta, L2, R); |
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| 447 | R = R2; |
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| 448 | s->decorr[i].samplesA[0] = R; |
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| 449 | } else { |
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| 450 | if (type != AV_SAMPLE_FMT_S16P) |
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| 451 | R2 = R + ((s->decorr[i].weightB * (int64_t)s->decorr[i].samplesB[0] + 512) >> 10); |
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| 452 | else |
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| 453 | R2 = R + ((s->decorr[i].weightB * s->decorr[i].samplesB[0] + 512) >> 10); |
||
| 454 | UPDATE_WEIGHT_CLIP(s->decorr[i].weightB, s->decorr[i].delta, s->decorr[i].samplesB[0], R); |
||
| 455 | R = R2; |
||
| 456 | |||
| 457 | if (t == -3) { |
||
| 458 | R2 = s->decorr[i].samplesA[0]; |
||
| 459 | s->decorr[i].samplesA[0] = R; |
||
| 460 | } |
||
| 461 | |||
| 462 | if (type != AV_SAMPLE_FMT_S16P) |
||
| 463 | L2 = L + ((s->decorr[i].weightA * (int64_t)R2 + 512) >> 10); |
||
| 464 | else |
||
| 465 | L2 = L + ((s->decorr[i].weightA * R2 + 512) >> 10); |
||
| 466 | UPDATE_WEIGHT_CLIP(s->decorr[i].weightA, s->decorr[i].delta, R2, L); |
||
| 467 | L = L2; |
||
| 468 | s->decorr[i].samplesB[0] = L; |
||
| 469 | } |
||
| 470 | } |
||
| 471 | pos = (pos + 1) & 7; |
||
| 472 | if (s->joint) |
||
| 473 | L += (R -= (L >> 1)); |
||
| 474 | crc = (crc * 3 + L) * 3 + R; |
||
| 475 | |||
| 476 | if (type == AV_SAMPLE_FMT_FLTP) { |
||
| 477 | *dstfl_l++ = wv_get_value_float(s, &crc_extra_bits, L); |
||
| 478 | *dstfl_r++ = wv_get_value_float(s, &crc_extra_bits, R); |
||
| 479 | } else if (type == AV_SAMPLE_FMT_S32P) { |
||
| 480 | *dst32_l++ = wv_get_value_integer(s, &crc_extra_bits, L); |
||
| 481 | *dst32_r++ = wv_get_value_integer(s, &crc_extra_bits, R); |
||
| 482 | } else { |
||
| 483 | *dst16_l++ = wv_get_value_integer(s, &crc_extra_bits, L); |
||
| 484 | *dst16_r++ = wv_get_value_integer(s, &crc_extra_bits, R); |
||
| 485 | } |
||
| 486 | count++; |
||
| 487 | } while (!last && count < s->samples); |
||
| 488 | |||
| 489 | wv_reset_saved_context(s); |
||
| 490 | if ((s->avctx->err_recognition & AV_EF_CRCCHECK) && |
||
| 491 | wv_check_crc(s, crc, crc_extra_bits)) |
||
| 492 | return AVERROR_INVALIDDATA; |
||
| 493 | |||
| 494 | return 0; |
||
| 495 | } |
||
| 496 | |||
| 497 | static inline int wv_unpack_mono(WavpackFrameContext *s, GetBitContext *gb, |
||
| 498 | void *dst, const int type) |
||
| 499 | { |
||
| 500 | int i, j, count = 0; |
||
| 501 | int last, t; |
||
| 502 | int A, S, T; |
||
| 503 | int pos = s->pos; |
||
| 504 | uint32_t crc = s->sc.crc; |
||
| 505 | uint32_t crc_extra_bits = s->extra_sc.crc; |
||
| 506 | int16_t *dst16 = dst; |
||
| 507 | int32_t *dst32 = dst; |
||
| 508 | float *dstfl = dst; |
||
| 509 | |||
| 510 | s->one = s->zero = s->zeroes = 0; |
||
| 511 | do { |
||
| 512 | T = wv_get_value(s, gb, 0, &last); |
||
| 513 | S = 0; |
||
| 514 | if (last) |
||
| 515 | break; |
||
| 516 | for (i = 0; i < s->terms; i++) { |
||
| 517 | t = s->decorr[i].value; |
||
| 518 | if (t > 8) { |
||
| 519 | if (t & 1) |
||
| 520 | A = 2 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]; |
||
| 521 | else |
||
| 522 | A = (3 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]) >> 1; |
||
| 523 | s->decorr[i].samplesA[1] = s->decorr[i].samplesA[0]; |
||
| 524 | j = 0; |
||
| 525 | } else { |
||
| 526 | A = s->decorr[i].samplesA[pos]; |
||
| 527 | j = (pos + t) & 7; |
||
| 528 | } |
||
| 529 | if (type != AV_SAMPLE_FMT_S16P) |
||
| 530 | S = T + ((s->decorr[i].weightA * (int64_t)A + 512) >> 10); |
||
| 531 | else |
||
| 532 | S = T + ((s->decorr[i].weightA * A + 512) >> 10); |
||
| 533 | if (A && T) |
||
| 534 | s->decorr[i].weightA -= ((((T ^ A) >> 30) & 2) - 1) * s->decorr[i].delta; |
||
| 535 | s->decorr[i].samplesA[j] = T = S; |
||
| 536 | } |
||
| 537 | pos = (pos + 1) & 7; |
||
| 538 | crc = crc * 3 + S; |
||
| 539 | |||
| 540 | if (type == AV_SAMPLE_FMT_FLTP) { |
||
| 541 | *dstfl++ = wv_get_value_float(s, &crc_extra_bits, S); |
||
| 542 | } else if (type == AV_SAMPLE_FMT_S32P) { |
||
| 543 | *dst32++ = wv_get_value_integer(s, &crc_extra_bits, S); |
||
| 544 | } else { |
||
| 545 | *dst16++ = wv_get_value_integer(s, &crc_extra_bits, S); |
||
| 546 | } |
||
| 547 | count++; |
||
| 548 | } while (!last && count < s->samples); |
||
| 549 | |||
| 550 | wv_reset_saved_context(s); |
||
| 551 | if ((s->avctx->err_recognition & AV_EF_CRCCHECK) && |
||
| 552 | wv_check_crc(s, crc, crc_extra_bits)) |
||
| 553 | return AVERROR_INVALIDDATA; |
||
| 554 | |||
| 555 | return 0; |
||
| 556 | } |
||
| 557 | |||
| 558 | static av_cold int wv_alloc_frame_context(WavpackContext *c) |
||
| 559 | { |
||
| 560 | if (c->fdec_num == WV_MAX_FRAME_DECODERS) |
||
| 561 | return -1; |
||
| 562 | |||
| 563 | c->fdec[c->fdec_num] = av_mallocz(sizeof(**c->fdec)); |
||
| 564 | if (!c->fdec[c->fdec_num]) |
||
| 565 | return -1; |
||
| 566 | c->fdec_num++; |
||
| 567 | c->fdec[c->fdec_num - 1]->avctx = c->avctx; |
||
| 568 | wv_reset_saved_context(c->fdec[c->fdec_num - 1]); |
||
| 569 | |||
| 570 | return 0; |
||
| 571 | } |
||
| 572 | |||
| 573 | static int init_thread_copy(AVCodecContext *avctx) |
||
| 574 | { |
||
| 575 | WavpackContext *s = avctx->priv_data; |
||
| 576 | s->avctx = avctx; |
||
| 577 | return 0; |
||
| 578 | } |
||
| 579 | |||
| 580 | static av_cold int wavpack_decode_init(AVCodecContext *avctx) |
||
| 581 | { |
||
| 582 | WavpackContext *s = avctx->priv_data; |
||
| 583 | |||
| 584 | s->avctx = avctx; |
||
| 585 | |||
| 586 | s->fdec_num = 0; |
||
| 587 | |||
| 588 | return 0; |
||
| 589 | } |
||
| 590 | |||
| 591 | static av_cold int wavpack_decode_end(AVCodecContext *avctx) |
||
| 592 | { |
||
| 593 | WavpackContext *s = avctx->priv_data; |
||
| 594 | int i; |
||
| 595 | |||
| 596 | for (i = 0; i < s->fdec_num; i++) |
||
| 597 | av_freep(&s->fdec[i]); |
||
| 598 | s->fdec_num = 0; |
||
| 599 | |||
| 600 | return 0; |
||
| 601 | } |
||
| 602 | |||
| 603 | static int wavpack_decode_block(AVCodecContext *avctx, int block_no, |
||
| 604 | AVFrame *frame, const uint8_t *buf, int buf_size) |
||
| 605 | { |
||
| 606 | WavpackContext *wc = avctx->priv_data; |
||
| 607 | ThreadFrame tframe = { .f = frame }; |
||
| 608 | WavpackFrameContext *s; |
||
| 609 | GetByteContext gb; |
||
| 610 | void *samples_l, *samples_r; |
||
| 611 | int ret; |
||
| 612 | int got_terms = 0, got_weights = 0, got_samples = 0, |
||
| 613 | got_entropy = 0, got_bs = 0, got_float = 0, got_hybrid = 0; |
||
| 614 | int i, j, id, size, ssize, weights, t; |
||
| 615 | int bpp, chan = 0, chmask = 0, orig_bpp, sample_rate = 0; |
||
| 616 | int multiblock; |
||
| 617 | |||
| 618 | if (block_no >= wc->fdec_num && wv_alloc_frame_context(wc) < 0) { |
||
| 619 | av_log(avctx, AV_LOG_ERROR, "Error creating frame decode context\n"); |
||
| 620 | return AVERROR_INVALIDDATA; |
||
| 621 | } |
||
| 622 | |||
| 623 | s = wc->fdec[block_no]; |
||
| 624 | if (!s) { |
||
| 625 | av_log(avctx, AV_LOG_ERROR, "Context for block %d is not present\n", |
||
| 626 | block_no); |
||
| 627 | return AVERROR_INVALIDDATA; |
||
| 628 | } |
||
| 629 | |||
| 630 | memset(s->decorr, 0, MAX_TERMS * sizeof(Decorr)); |
||
| 631 | memset(s->ch, 0, sizeof(s->ch)); |
||
| 632 | s->extra_bits = 0; |
||
| 633 | s->and = s->or = s->shift = 0; |
||
| 634 | s->got_extra_bits = 0; |
||
| 635 | |||
| 636 | bytestream2_init(&gb, buf, buf_size); |
||
| 637 | |||
| 638 | s->samples = bytestream2_get_le32(&gb); |
||
| 639 | if (s->samples != wc->samples) { |
||
| 640 | av_log(avctx, AV_LOG_ERROR, "Mismatching number of samples in " |
||
| 641 | "a sequence: %d and %d\n", wc->samples, s->samples); |
||
| 642 | return AVERROR_INVALIDDATA; |
||
| 643 | } |
||
| 644 | s->frame_flags = bytestream2_get_le32(&gb); |
||
| 645 | bpp = av_get_bytes_per_sample(avctx->sample_fmt); |
||
| 646 | orig_bpp = ((s->frame_flags & 0x03) + 1) << 3; |
||
| 647 | multiblock = (s->frame_flags & WV_SINGLE_BLOCK) != WV_SINGLE_BLOCK; |
||
| 648 | |||
| 649 | s->stereo = !(s->frame_flags & WV_MONO); |
||
| 650 | s->stereo_in = (s->frame_flags & WV_FALSE_STEREO) ? 0 : s->stereo; |
||
| 651 | s->joint = s->frame_flags & WV_JOINT_STEREO; |
||
| 652 | s->hybrid = s->frame_flags & WV_HYBRID_MODE; |
||
| 653 | s->hybrid_bitrate = s->frame_flags & WV_HYBRID_BITRATE; |
||
| 654 | s->post_shift = bpp * 8 - orig_bpp + ((s->frame_flags >> 13) & 0x1f); |
||
| 655 | s->hybrid_maxclip = ((1LL << (orig_bpp - 1)) - 1); |
||
| 656 | s->hybrid_minclip = ((-1LL << (orig_bpp - 1))); |
||
| 657 | s->CRC = bytestream2_get_le32(&gb); |
||
| 658 | |||
| 659 | // parse metadata blocks |
||
| 660 | while (bytestream2_get_bytes_left(&gb)) { |
||
| 661 | id = bytestream2_get_byte(&gb); |
||
| 662 | size = bytestream2_get_byte(&gb); |
||
| 663 | if (id & WP_IDF_LONG) { |
||
| 664 | size |= (bytestream2_get_byte(&gb)) << 8; |
||
| 665 | size |= (bytestream2_get_byte(&gb)) << 16; |
||
| 666 | } |
||
| 667 | size <<= 1; // size is specified in words |
||
| 668 | ssize = size; |
||
| 669 | if (id & WP_IDF_ODD) |
||
| 670 | size--; |
||
| 671 | if (size < 0) { |
||
| 672 | av_log(avctx, AV_LOG_ERROR, |
||
| 673 | "Got incorrect block %02X with size %i\n", id, size); |
||
| 674 | break; |
||
| 675 | } |
||
| 676 | if (bytestream2_get_bytes_left(&gb) < ssize) { |
||
| 677 | av_log(avctx, AV_LOG_ERROR, |
||
| 678 | "Block size %i is out of bounds\n", size); |
||
| 679 | break; |
||
| 680 | } |
||
| 681 | switch (id & WP_IDF_MASK) { |
||
| 682 | case WP_ID_DECTERMS: |
||
| 683 | if (size > MAX_TERMS) { |
||
| 684 | av_log(avctx, AV_LOG_ERROR, "Too many decorrelation terms\n"); |
||
| 685 | s->terms = 0; |
||
| 686 | bytestream2_skip(&gb, ssize); |
||
| 687 | continue; |
||
| 688 | } |
||
| 689 | s->terms = size; |
||
| 690 | for (i = 0; i < s->terms; i++) { |
||
| 691 | uint8_t val = bytestream2_get_byte(&gb); |
||
| 692 | s->decorr[s->terms - i - 1].value = (val & 0x1F) - 5; |
||
| 693 | s->decorr[s->terms - i - 1].delta = val >> 5; |
||
| 694 | } |
||
| 695 | got_terms = 1; |
||
| 696 | break; |
||
| 697 | case WP_ID_DECWEIGHTS: |
||
| 698 | if (!got_terms) { |
||
| 699 | av_log(avctx, AV_LOG_ERROR, "No decorrelation terms met\n"); |
||
| 700 | continue; |
||
| 701 | } |
||
| 702 | weights = size >> s->stereo_in; |
||
| 703 | if (weights > MAX_TERMS || weights > s->terms) { |
||
| 704 | av_log(avctx, AV_LOG_ERROR, "Too many decorrelation weights\n"); |
||
| 705 | bytestream2_skip(&gb, ssize); |
||
| 706 | continue; |
||
| 707 | } |
||
| 708 | for (i = 0; i < weights; i++) { |
||
| 709 | t = (int8_t)bytestream2_get_byte(&gb); |
||
| 710 | s->decorr[s->terms - i - 1].weightA = t << 3; |
||
| 711 | if (s->decorr[s->terms - i - 1].weightA > 0) |
||
| 712 | s->decorr[s->terms - i - 1].weightA += |
||
| 713 | (s->decorr[s->terms - i - 1].weightA + 64) >> 7; |
||
| 714 | if (s->stereo_in) { |
||
| 715 | t = (int8_t)bytestream2_get_byte(&gb); |
||
| 716 | s->decorr[s->terms - i - 1].weightB = t << 3; |
||
| 717 | if (s->decorr[s->terms - i - 1].weightB > 0) |
||
| 718 | s->decorr[s->terms - i - 1].weightB += |
||
| 719 | (s->decorr[s->terms - i - 1].weightB + 64) >> 7; |
||
| 720 | } |
||
| 721 | } |
||
| 722 | got_weights = 1; |
||
| 723 | break; |
||
| 724 | case WP_ID_DECSAMPLES: |
||
| 725 | if (!got_terms) { |
||
| 726 | av_log(avctx, AV_LOG_ERROR, "No decorrelation terms met\n"); |
||
| 727 | continue; |
||
| 728 | } |
||
| 729 | t = 0; |
||
| 730 | for (i = s->terms - 1; (i >= 0) && (t < size); i--) { |
||
| 731 | if (s->decorr[i].value > 8) { |
||
| 732 | s->decorr[i].samplesA[0] = |
||
| 733 | wp_exp2(bytestream2_get_le16(&gb)); |
||
| 734 | s->decorr[i].samplesA[1] = |
||
| 735 | wp_exp2(bytestream2_get_le16(&gb)); |
||
| 736 | |||
| 737 | if (s->stereo_in) { |
||
| 738 | s->decorr[i].samplesB[0] = |
||
| 739 | wp_exp2(bytestream2_get_le16(&gb)); |
||
| 740 | s->decorr[i].samplesB[1] = |
||
| 741 | wp_exp2(bytestream2_get_le16(&gb)); |
||
| 742 | t += 4; |
||
| 743 | } |
||
| 744 | t += 4; |
||
| 745 | } else if (s->decorr[i].value < 0) { |
||
| 746 | s->decorr[i].samplesA[0] = |
||
| 747 | wp_exp2(bytestream2_get_le16(&gb)); |
||
| 748 | s->decorr[i].samplesB[0] = |
||
| 749 | wp_exp2(bytestream2_get_le16(&gb)); |
||
| 750 | t += 4; |
||
| 751 | } else { |
||
| 752 | for (j = 0; j < s->decorr[i].value; j++) { |
||
| 753 | s->decorr[i].samplesA[j] = |
||
| 754 | wp_exp2(bytestream2_get_le16(&gb)); |
||
| 755 | if (s->stereo_in) { |
||
| 756 | s->decorr[i].samplesB[j] = |
||
| 757 | wp_exp2(bytestream2_get_le16(&gb)); |
||
| 758 | } |
||
| 759 | } |
||
| 760 | t += s->decorr[i].value * 2 * (s->stereo_in + 1); |
||
| 761 | } |
||
| 762 | } |
||
| 763 | got_samples = 1; |
||
| 764 | break; |
||
| 765 | case WP_ID_ENTROPY: |
||
| 766 | if (size != 6 * (s->stereo_in + 1)) { |
||
| 767 | av_log(avctx, AV_LOG_ERROR, |
||
| 768 | "Entropy vars size should be %i, got %i.\n", |
||
| 769 | 6 * (s->stereo_in + 1), size); |
||
| 770 | bytestream2_skip(&gb, ssize); |
||
| 771 | continue; |
||
| 772 | } |
||
| 773 | for (j = 0; j <= s->stereo_in; j++) |
||
| 774 | for (i = 0; i < 3; i++) { |
||
| 775 | s->ch[j].median[i] = wp_exp2(bytestream2_get_le16(&gb)); |
||
| 776 | } |
||
| 777 | got_entropy = 1; |
||
| 778 | break; |
||
| 779 | case WP_ID_HYBRID: |
||
| 780 | if (s->hybrid_bitrate) { |
||
| 781 | for (i = 0; i <= s->stereo_in; i++) { |
||
| 782 | s->ch[i].slow_level = wp_exp2(bytestream2_get_le16(&gb)); |
||
| 783 | size -= 2; |
||
| 784 | } |
||
| 785 | } |
||
| 786 | for (i = 0; i < (s->stereo_in + 1); i++) { |
||
| 787 | s->ch[i].bitrate_acc = bytestream2_get_le16(&gb) << 16; |
||
| 788 | size -= 2; |
||
| 789 | } |
||
| 790 | if (size > 0) { |
||
| 791 | for (i = 0; i < (s->stereo_in + 1); i++) { |
||
| 792 | s->ch[i].bitrate_delta = |
||
| 793 | wp_exp2((int16_t)bytestream2_get_le16(&gb)); |
||
| 794 | } |
||
| 795 | } else { |
||
| 796 | for (i = 0; i < (s->stereo_in + 1); i++) |
||
| 797 | s->ch[i].bitrate_delta = 0; |
||
| 798 | } |
||
| 799 | got_hybrid = 1; |
||
| 800 | break; |
||
| 801 | case WP_ID_INT32INFO: { |
||
| 802 | uint8_t val[4]; |
||
| 803 | if (size != 4) { |
||
| 804 | av_log(avctx, AV_LOG_ERROR, |
||
| 805 | "Invalid INT32INFO, size = %i\n", |
||
| 806 | size); |
||
| 807 | bytestream2_skip(&gb, ssize - 4); |
||
| 808 | continue; |
||
| 809 | } |
||
| 810 | bytestream2_get_buffer(&gb, val, 4); |
||
| 811 | if (val[0]) { |
||
| 812 | s->extra_bits = val[0]; |
||
| 813 | } else if (val[1]) { |
||
| 814 | s->shift = val[1]; |
||
| 815 | } else if (val[2]) { |
||
| 816 | s->and = s->or = 1; |
||
| 817 | s->shift = val[2]; |
||
| 818 | } else if (val[3]) { |
||
| 819 | s->and = 1; |
||
| 820 | s->shift = val[3]; |
||
| 821 | } |
||
| 822 | /* original WavPack decoder forces 32-bit lossy sound to be treated |
||
| 823 | * as 24-bit one in order to have proper clipping */ |
||
| 824 | if (s->hybrid && bpp == 4 && s->post_shift < 8 && s->shift > 8) { |
||
| 825 | s->post_shift += 8; |
||
| 826 | s->shift -= 8; |
||
| 827 | s->hybrid_maxclip >>= 8; |
||
| 828 | s->hybrid_minclip >>= 8; |
||
| 829 | } |
||
| 830 | break; |
||
| 831 | } |
||
| 832 | case WP_ID_FLOATINFO: |
||
| 833 | if (size != 4) { |
||
| 834 | av_log(avctx, AV_LOG_ERROR, |
||
| 835 | "Invalid FLOATINFO, size = %i\n", size); |
||
| 836 | bytestream2_skip(&gb, ssize); |
||
| 837 | continue; |
||
| 838 | } |
||
| 839 | s->float_flag = bytestream2_get_byte(&gb); |
||
| 840 | s->float_shift = bytestream2_get_byte(&gb); |
||
| 841 | s->float_max_exp = bytestream2_get_byte(&gb); |
||
| 842 | got_float = 1; |
||
| 843 | bytestream2_skip(&gb, 1); |
||
| 844 | break; |
||
| 845 | case WP_ID_DATA: |
||
| 846 | s->sc.offset = bytestream2_tell(&gb); |
||
| 847 | s->sc.size = size * 8; |
||
| 848 | init_get_bits(&s->gb, gb.buffer, size * 8); |
||
| 849 | s->data_size = size * 8; |
||
| 850 | bytestream2_skip(&gb, size); |
||
| 851 | got_bs = 1; |
||
| 852 | break; |
||
| 853 | case WP_ID_EXTRABITS: |
||
| 854 | if (size <= 4) { |
||
| 855 | av_log(avctx, AV_LOG_ERROR, "Invalid EXTRABITS, size = %i\n", |
||
| 856 | size); |
||
| 857 | bytestream2_skip(&gb, size); |
||
| 858 | continue; |
||
| 859 | } |
||
| 860 | s->extra_sc.offset = bytestream2_tell(&gb); |
||
| 861 | s->extra_sc.size = size * 8; |
||
| 862 | init_get_bits(&s->gb_extra_bits, gb.buffer, size * 8); |
||
| 863 | s->crc_extra_bits = get_bits_long(&s->gb_extra_bits, 32); |
||
| 864 | bytestream2_skip(&gb, size); |
||
| 865 | s->got_extra_bits = 1; |
||
| 866 | break; |
||
| 867 | case WP_ID_CHANINFO: |
||
| 868 | if (size <= 1) { |
||
| 869 | av_log(avctx, AV_LOG_ERROR, |
||
| 870 | "Insufficient channel information\n"); |
||
| 871 | return AVERROR_INVALIDDATA; |
||
| 872 | } |
||
| 873 | chan = bytestream2_get_byte(&gb); |
||
| 874 | switch (size - 2) { |
||
| 875 | case 0: |
||
| 876 | chmask = bytestream2_get_byte(&gb); |
||
| 877 | break; |
||
| 878 | case 1: |
||
| 879 | chmask = bytestream2_get_le16(&gb); |
||
| 880 | break; |
||
| 881 | case 2: |
||
| 882 | chmask = bytestream2_get_le24(&gb); |
||
| 883 | break; |
||
| 884 | case 3: |
||
| 885 | chmask = bytestream2_get_le32(&gb); |
||
| 886 | break; |
||
| 887 | case 5: |
||
| 888 | bytestream2_skip(&gb, 1); |
||
| 889 | chan |= (bytestream2_get_byte(&gb) & 0xF) << 8; |
||
| 890 | chmask = bytestream2_get_le16(&gb); |
||
| 891 | break; |
||
| 892 | default: |
||
| 893 | av_log(avctx, AV_LOG_ERROR, "Invalid channel info size %d\n", |
||
| 894 | size); |
||
| 895 | chan = avctx->channels; |
||
| 896 | chmask = avctx->channel_layout; |
||
| 897 | } |
||
| 898 | break; |
||
| 899 | case WP_ID_SAMPLE_RATE: |
||
| 900 | if (size != 3) { |
||
| 901 | av_log(avctx, AV_LOG_ERROR, "Invalid custom sample rate.\n"); |
||
| 902 | return AVERROR_INVALIDDATA; |
||
| 903 | } |
||
| 904 | sample_rate = bytestream2_get_le24(&gb); |
||
| 905 | break; |
||
| 906 | default: |
||
| 907 | bytestream2_skip(&gb, size); |
||
| 908 | } |
||
| 909 | if (id & WP_IDF_ODD) |
||
| 910 | bytestream2_skip(&gb, 1); |
||
| 911 | } |
||
| 912 | |||
| 913 | if (!got_terms) { |
||
| 914 | av_log(avctx, AV_LOG_ERROR, "No block with decorrelation terms\n"); |
||
| 915 | return AVERROR_INVALIDDATA; |
||
| 916 | } |
||
| 917 | if (!got_weights) { |
||
| 918 | av_log(avctx, AV_LOG_ERROR, "No block with decorrelation weights\n"); |
||
| 919 | return AVERROR_INVALIDDATA; |
||
| 920 | } |
||
| 921 | if (!got_samples) { |
||
| 922 | av_log(avctx, AV_LOG_ERROR, "No block with decorrelation samples\n"); |
||
| 923 | return AVERROR_INVALIDDATA; |
||
| 924 | } |
||
| 925 | if (!got_entropy) { |
||
| 926 | av_log(avctx, AV_LOG_ERROR, "No block with entropy info\n"); |
||
| 927 | return AVERROR_INVALIDDATA; |
||
| 928 | } |
||
| 929 | if (s->hybrid && !got_hybrid) { |
||
| 930 | av_log(avctx, AV_LOG_ERROR, "Hybrid config not found\n"); |
||
| 931 | return AVERROR_INVALIDDATA; |
||
| 932 | } |
||
| 933 | if (!got_bs) { |
||
| 934 | av_log(avctx, AV_LOG_ERROR, "Packed samples not found\n"); |
||
| 935 | return AVERROR_INVALIDDATA; |
||
| 936 | } |
||
| 937 | if (!got_float && avctx->sample_fmt == AV_SAMPLE_FMT_FLTP) { |
||
| 938 | av_log(avctx, AV_LOG_ERROR, "Float information not found\n"); |
||
| 939 | return AVERROR_INVALIDDATA; |
||
| 940 | } |
||
| 941 | if (s->got_extra_bits && avctx->sample_fmt != AV_SAMPLE_FMT_FLTP) { |
||
| 942 | const int size = get_bits_left(&s->gb_extra_bits); |
||
| 943 | const int wanted = s->samples * s->extra_bits << s->stereo_in; |
||
| 944 | if (size < wanted) { |
||
| 945 | av_log(avctx, AV_LOG_ERROR, "Too small EXTRABITS\n"); |
||
| 946 | s->got_extra_bits = 0; |
||
| 947 | } |
||
| 948 | } |
||
| 949 | |||
| 950 | if (!wc->ch_offset) { |
||
| 951 | int sr = (s->frame_flags >> 23) & 0xf; |
||
| 952 | if (sr == 0xf) { |
||
| 953 | if (!sample_rate) { |
||
| 954 | av_log(avctx, AV_LOG_ERROR, "Custom sample rate missing.\n"); |
||
| 955 | return AVERROR_INVALIDDATA; |
||
| 956 | } |
||
| 957 | avctx->sample_rate = sample_rate; |
||
| 958 | } else |
||
| 959 | avctx->sample_rate = wv_rates[sr]; |
||
| 960 | |||
| 961 | if (multiblock) { |
||
| 962 | if (chan) |
||
| 963 | avctx->channels = chan; |
||
| 964 | if (chmask) |
||
| 965 | avctx->channel_layout = chmask; |
||
| 966 | } else { |
||
| 967 | avctx->channels = s->stereo ? 2 : 1; |
||
| 968 | avctx->channel_layout = s->stereo ? AV_CH_LAYOUT_STEREO : |
||
| 969 | AV_CH_LAYOUT_MONO; |
||
| 970 | } |
||
| 971 | |||
| 972 | /* get output buffer */ |
||
| 973 | frame->nb_samples = s->samples + 1; |
||
| 974 | if ((ret = ff_thread_get_buffer(avctx, &tframe, 0)) < 0) |
||
| 975 | return ret; |
||
| 976 | frame->nb_samples = s->samples; |
||
| 977 | } |
||
| 978 | |||
| 979 | if (wc->ch_offset + s->stereo >= avctx->channels) { |
||
| 980 | av_log(avctx, AV_LOG_WARNING, "Too many channels coded in a packet.\n"); |
||
| 981 | return (avctx->err_recognition & AV_EF_EXPLODE) ? AVERROR_INVALIDDATA : 0; |
||
| 982 | } |
||
| 983 | |||
| 984 | samples_l = frame->extended_data[wc->ch_offset]; |
||
| 985 | if (s->stereo) |
||
| 986 | samples_r = frame->extended_data[wc->ch_offset + 1]; |
||
| 987 | |||
| 988 | wc->ch_offset += 1 + s->stereo; |
||
| 989 | |||
| 990 | if (s->stereo_in) { |
||
| 991 | ret = wv_unpack_stereo(s, &s->gb, samples_l, samples_r, avctx->sample_fmt); |
||
| 992 | if (ret < 0) |
||
| 993 | return ret; |
||
| 994 | } else { |
||
| 995 | ret = wv_unpack_mono(s, &s->gb, samples_l, avctx->sample_fmt); |
||
| 996 | if (ret < 0) |
||
| 997 | return ret; |
||
| 998 | |||
| 999 | if (s->stereo) |
||
| 1000 | memcpy(samples_r, samples_l, bpp * s->samples); |
||
| 1001 | } |
||
| 1002 | |||
| 1003 | return 0; |
||
| 1004 | } |
||
| 1005 | |||
| 1006 | static void wavpack_decode_flush(AVCodecContext *avctx) |
||
| 1007 | { |
||
| 1008 | WavpackContext *s = avctx->priv_data; |
||
| 1009 | int i; |
||
| 1010 | |||
| 1011 | for (i = 0; i < s->fdec_num; i++) |
||
| 1012 | wv_reset_saved_context(s->fdec[i]); |
||
| 1013 | } |
||
| 1014 | |||
| 1015 | static int wavpack_decode_frame(AVCodecContext *avctx, void *data, |
||
| 1016 | int *got_frame_ptr, AVPacket *avpkt) |
||
| 1017 | { |
||
| 1018 | WavpackContext *s = avctx->priv_data; |
||
| 1019 | const uint8_t *buf = avpkt->data; |
||
| 1020 | int buf_size = avpkt->size; |
||
| 1021 | AVFrame *frame = data; |
||
| 1022 | int frame_size, ret, frame_flags; |
||
| 1023 | |||
| 1024 | if (avpkt->size <= WV_HEADER_SIZE) |
||
| 1025 | return AVERROR_INVALIDDATA; |
||
| 1026 | |||
| 1027 | s->block = 0; |
||
| 1028 | s->ch_offset = 0; |
||
| 1029 | |||
| 1030 | /* determine number of samples */ |
||
| 1031 | s->samples = AV_RL32(buf + 20); |
||
| 1032 | frame_flags = AV_RL32(buf + 24); |
||
| 1033 | if (s->samples <= 0 || s->samples > WV_MAX_SAMPLES) { |
||
| 1034 | av_log(avctx, AV_LOG_ERROR, "Invalid number of samples: %d\n", |
||
| 1035 | s->samples); |
||
| 1036 | return AVERROR_INVALIDDATA; |
||
| 1037 | } |
||
| 1038 | |||
| 1039 | if (frame_flags & 0x80) { |
||
| 1040 | avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; |
||
| 1041 | } else if ((frame_flags & 0x03) <= 1) { |
||
| 1042 | avctx->sample_fmt = AV_SAMPLE_FMT_S16P; |
||
| 1043 | } else { |
||
| 1044 | avctx->sample_fmt = AV_SAMPLE_FMT_S32P; |
||
| 1045 | avctx->bits_per_raw_sample = ((frame_flags & 0x03) + 1) << 3; |
||
| 1046 | } |
||
| 1047 | |||
| 1048 | while (buf_size > 0) { |
||
| 1049 | if (buf_size <= WV_HEADER_SIZE) |
||
| 1050 | break; |
||
| 1051 | frame_size = AV_RL32(buf + 4) - 12; |
||
| 1052 | buf += 20; |
||
| 1053 | buf_size -= 20; |
||
| 1054 | if (frame_size <= 0 || frame_size > buf_size) { |
||
| 1055 | av_log(avctx, AV_LOG_ERROR, |
||
| 1056 | "Block %d has invalid size (size %d vs. %d bytes left)\n", |
||
| 1057 | s->block, frame_size, buf_size); |
||
| 1058 | wavpack_decode_flush(avctx); |
||
| 1059 | return AVERROR_INVALIDDATA; |
||
| 1060 | } |
||
| 1061 | if ((ret = wavpack_decode_block(avctx, s->block, |
||
| 1062 | frame, buf, frame_size)) < 0) { |
||
| 1063 | wavpack_decode_flush(avctx); |
||
| 1064 | return ret; |
||
| 1065 | } |
||
| 1066 | s->block++; |
||
| 1067 | buf += frame_size; |
||
| 1068 | buf_size -= frame_size; |
||
| 1069 | } |
||
| 1070 | |||
| 1071 | if (s->ch_offset != avctx->channels) { |
||
| 1072 | av_log(avctx, AV_LOG_ERROR, "Not enough channels coded in a packet.\n"); |
||
| 1073 | return AVERROR_INVALIDDATA; |
||
| 1074 | } |
||
| 1075 | |||
| 1076 | *got_frame_ptr = 1; |
||
| 1077 | |||
| 1078 | return avpkt->size; |
||
| 1079 | } |
||
| 1080 | |||
| 1081 | AVCodec ff_wavpack_decoder = { |
||
| 1082 | .name = "wavpack", |
||
| 1083 | .long_name = NULL_IF_CONFIG_SMALL("WavPack"), |
||
| 1084 | .type = AVMEDIA_TYPE_AUDIO, |
||
| 1085 | .id = AV_CODEC_ID_WAVPACK, |
||
| 1086 | .priv_data_size = sizeof(WavpackContext), |
||
| 1087 | .init = wavpack_decode_init, |
||
| 1088 | .close = wavpack_decode_end, |
||
| 1089 | .decode = wavpack_decode_frame, |
||
| 1090 | .flush = wavpack_decode_flush, |
||
| 1091 | .init_thread_copy = ONLY_IF_THREADS_ENABLED(init_thread_copy), |
||
| 1092 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS, |
||
| 1093 | }; |