mirror of https://git.ffmpeg.org/ffmpeg.git
1118 lines
37 KiB
C
1118 lines
37 KiB
C
/*
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* WavPack lossless audio decoder
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* Copyright (c) 2006,2011 Konstantin Shishkov
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#define BITSTREAM_READER_LE
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#include "libavutil/channel_layout.h"
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#include "avcodec.h"
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#include "get_bits.h"
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#include "internal.h"
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#include "thread.h"
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#include "unary.h"
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#include "bytestream.h"
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#include "wavpack.h"
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/**
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* @file
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* WavPack lossless audio decoder
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*/
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typedef struct SavedContext {
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int offset;
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int size;
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int bits_used;
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uint32_t crc;
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} SavedContext;
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typedef struct WavpackFrameContext {
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AVCodecContext *avctx;
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int frame_flags;
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int stereo, stereo_in;
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int joint;
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uint32_t CRC;
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GetBitContext gb;
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int got_extra_bits;
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uint32_t crc_extra_bits;
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GetBitContext gb_extra_bits;
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int data_size; // in bits
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int samples;
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int terms;
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Decorr decorr[MAX_TERMS];
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int zero, one, zeroes;
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int extra_bits;
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int and, or, shift;
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int post_shift;
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int hybrid, hybrid_bitrate;
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int hybrid_maxclip, hybrid_minclip;
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int float_flag;
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int float_shift;
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int float_max_exp;
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WvChannel ch[2];
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int pos;
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SavedContext sc, extra_sc;
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} WavpackFrameContext;
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#define WV_MAX_FRAME_DECODERS 14
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typedef struct WavpackContext {
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AVCodecContext *avctx;
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WavpackFrameContext *fdec[WV_MAX_FRAME_DECODERS];
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int fdec_num;
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int block;
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int samples;
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int ch_offset;
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} WavpackContext;
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#define LEVEL_DECAY(a) (((a) + 0x80) >> 8)
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static av_always_inline int get_tail(GetBitContext *gb, int k)
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{
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int p, e, res;
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if (k < 1)
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return 0;
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p = av_log2(k);
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e = (1 << (p + 1)) - k - 1;
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res = p ? get_bits(gb, p) : 0;
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if (res >= e)
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res = (res << 1) - e + get_bits1(gb);
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return res;
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}
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static void update_error_limit(WavpackFrameContext *ctx)
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{
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int i, br[2], sl[2];
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for (i = 0; i <= ctx->stereo_in; i++) {
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ctx->ch[i].bitrate_acc += ctx->ch[i].bitrate_delta;
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br[i] = ctx->ch[i].bitrate_acc >> 16;
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sl[i] = LEVEL_DECAY(ctx->ch[i].slow_level);
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}
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if (ctx->stereo_in && ctx->hybrid_bitrate) {
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int balance = (sl[1] - sl[0] + br[1] + 1) >> 1;
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if (balance > br[0]) {
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br[1] = br[0] << 1;
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br[0] = 0;
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} else if (-balance > br[0]) {
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br[0] <<= 1;
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br[1] = 0;
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} else {
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br[1] = br[0] + balance;
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br[0] = br[0] - balance;
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}
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}
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for (i = 0; i <= ctx->stereo_in; i++) {
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if (ctx->hybrid_bitrate) {
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if (sl[i] - br[i] > -0x100)
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ctx->ch[i].error_limit = wp_exp2(sl[i] - br[i] + 0x100);
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else
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ctx->ch[i].error_limit = 0;
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} else {
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ctx->ch[i].error_limit = wp_exp2(br[i]);
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}
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}
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}
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static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb,
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int channel, int *last)
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{
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int t, t2;
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int sign, base, add, ret;
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WvChannel *c = &ctx->ch[channel];
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*last = 0;
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if ((ctx->ch[0].median[0] < 2U) && (ctx->ch[1].median[0] < 2U) &&
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!ctx->zero && !ctx->one) {
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if (ctx->zeroes) {
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ctx->zeroes--;
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if (ctx->zeroes) {
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c->slow_level -= LEVEL_DECAY(c->slow_level);
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return 0;
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}
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} else {
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t = get_unary_0_33(gb);
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if (t >= 2) {
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if (get_bits_left(gb) < t - 1)
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goto error;
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t = get_bits(gb, t - 1) | (1 << (t - 1));
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} else {
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if (get_bits_left(gb) < 0)
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goto error;
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}
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ctx->zeroes = t;
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if (ctx->zeroes) {
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memset(ctx->ch[0].median, 0, sizeof(ctx->ch[0].median));
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memset(ctx->ch[1].median, 0, sizeof(ctx->ch[1].median));
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c->slow_level -= LEVEL_DECAY(c->slow_level);
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return 0;
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}
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}
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}
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if (ctx->zero) {
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t = 0;
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ctx->zero = 0;
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} else {
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t = get_unary_0_33(gb);
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if (get_bits_left(gb) < 0)
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goto error;
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if (t == 16) {
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t2 = get_unary_0_33(gb);
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if (t2 < 2) {
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if (get_bits_left(gb) < 0)
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goto error;
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t += t2;
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} else {
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if (get_bits_left(gb) < t2 - 1)
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goto error;
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t += get_bits(gb, t2 - 1) | (1 << (t2 - 1));
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}
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}
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if (ctx->one) {
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ctx->one = t & 1;
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t = (t >> 1) + 1;
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} else {
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ctx->one = t & 1;
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t >>= 1;
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}
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ctx->zero = !ctx->one;
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}
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if (ctx->hybrid && !channel)
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update_error_limit(ctx);
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if (!t) {
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base = 0;
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add = GET_MED(0) - 1;
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DEC_MED(0);
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} else if (t == 1) {
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base = GET_MED(0);
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add = GET_MED(1) - 1;
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INC_MED(0);
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DEC_MED(1);
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} else if (t == 2) {
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base = GET_MED(0) + GET_MED(1);
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add = GET_MED(2) - 1;
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INC_MED(0);
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INC_MED(1);
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DEC_MED(2);
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} else {
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base = GET_MED(0) + GET_MED(1) + GET_MED(2) * (t - 2);
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add = GET_MED(2) - 1;
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INC_MED(0);
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INC_MED(1);
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INC_MED(2);
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}
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if (!c->error_limit) {
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if (add >= 0x2000000U) {
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av_log(ctx->avctx, AV_LOG_ERROR, "k %d is too large\n", add);
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goto error;
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}
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ret = base + get_tail(gb, add);
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if (get_bits_left(gb) <= 0)
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goto error;
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} else {
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int mid = (base * 2 + add + 1) >> 1;
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while (add > c->error_limit) {
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if (get_bits_left(gb) <= 0)
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goto error;
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if (get_bits1(gb)) {
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add -= (mid - base);
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base = mid;
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} else
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add = mid - base - 1;
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mid = (base * 2 + add + 1) >> 1;
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}
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ret = mid;
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}
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sign = get_bits1(gb);
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if (ctx->hybrid_bitrate)
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c->slow_level += wp_log2(ret) - LEVEL_DECAY(c->slow_level);
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return sign ? ~ret : ret;
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error:
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ret = get_bits_left(gb);
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if (ret <= 0) {
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av_log(ctx->avctx, AV_LOG_ERROR, "Too few bits (%d) left\n", ret);
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}
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*last = 1;
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return 0;
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}
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static inline int wv_get_value_integer(WavpackFrameContext *s, uint32_t *crc,
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int S)
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{
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int bit;
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if (s->extra_bits) {
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S <<= s->extra_bits;
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if (s->got_extra_bits &&
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get_bits_left(&s->gb_extra_bits) >= s->extra_bits) {
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S |= get_bits(&s->gb_extra_bits, s->extra_bits);
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*crc = *crc * 9 + (S & 0xffff) * 3 + ((unsigned)S >> 16);
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}
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}
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bit = (S & s->and) | s->or;
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bit = ((S + bit) << s->shift) - bit;
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if (s->hybrid)
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bit = av_clip(bit, s->hybrid_minclip, s->hybrid_maxclip);
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return bit << s->post_shift;
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}
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static float wv_get_value_float(WavpackFrameContext *s, uint32_t *crc, int S)
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{
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union {
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float f;
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uint32_t u;
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} value;
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unsigned int sign;
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int exp = s->float_max_exp;
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if (s->got_extra_bits) {
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const int max_bits = 1 + 23 + 8 + 1;
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const int left_bits = get_bits_left(&s->gb_extra_bits);
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if (left_bits + 8 * FF_INPUT_BUFFER_PADDING_SIZE < max_bits)
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return 0.0;
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}
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if (S) {
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S <<= s->float_shift;
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sign = S < 0;
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if (sign)
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S = -S;
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if (S >= 0x1000000) {
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if (s->got_extra_bits && get_bits1(&s->gb_extra_bits))
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S = get_bits(&s->gb_extra_bits, 23);
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else
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S = 0;
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exp = 255;
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} else if (exp) {
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int shift = 23 - av_log2(S);
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exp = s->float_max_exp;
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if (exp <= shift)
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shift = --exp;
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exp -= shift;
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if (shift) {
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S <<= shift;
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if ((s->float_flag & WV_FLT_SHIFT_ONES) ||
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(s->got_extra_bits &&
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(s->float_flag & WV_FLT_SHIFT_SAME) &&
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get_bits1(&s->gb_extra_bits))) {
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S |= (1 << shift) - 1;
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} else if (s->got_extra_bits &&
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(s->float_flag & WV_FLT_SHIFT_SENT)) {
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S |= get_bits(&s->gb_extra_bits, shift);
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}
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}
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} else {
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exp = s->float_max_exp;
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}
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S &= 0x7fffff;
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} else {
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sign = 0;
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exp = 0;
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if (s->got_extra_bits && (s->float_flag & WV_FLT_ZERO_SENT)) {
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if (get_bits1(&s->gb_extra_bits)) {
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S = get_bits(&s->gb_extra_bits, 23);
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if (s->float_max_exp >= 25)
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exp = get_bits(&s->gb_extra_bits, 8);
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sign = get_bits1(&s->gb_extra_bits);
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} else {
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if (s->float_flag & WV_FLT_ZERO_SIGN)
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sign = get_bits1(&s->gb_extra_bits);
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}
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}
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}
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*crc = *crc * 27 + S * 9 + exp * 3 + sign;
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value.u = (sign << 31) | (exp << 23) | S;
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return value.f;
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}
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static void wv_reset_saved_context(WavpackFrameContext *s)
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{
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s->pos = 0;
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s->sc.crc = s->extra_sc.crc = 0xFFFFFFFF;
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}
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static inline int wv_check_crc(WavpackFrameContext *s, uint32_t crc,
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uint32_t crc_extra_bits)
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{
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if (crc != s->CRC) {
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av_log(s->avctx, AV_LOG_ERROR, "CRC error\n");
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return AVERROR_INVALIDDATA;
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}
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if (s->got_extra_bits && crc_extra_bits != s->crc_extra_bits) {
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av_log(s->avctx, AV_LOG_ERROR, "Extra bits CRC error\n");
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return AVERROR_INVALIDDATA;
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}
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return 0;
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}
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static inline int wv_unpack_stereo(WavpackFrameContext *s, GetBitContext *gb,
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void *dst_l, void *dst_r, const int type)
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{
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int i, j, count = 0;
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int last, t;
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int A, B, L, L2, R, R2;
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int pos = s->pos;
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uint32_t crc = s->sc.crc;
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uint32_t crc_extra_bits = s->extra_sc.crc;
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int16_t *dst16_l = dst_l;
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int16_t *dst16_r = dst_r;
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int32_t *dst32_l = dst_l;
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int32_t *dst32_r = dst_r;
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float *dstfl_l = dst_l;
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float *dstfl_r = dst_r;
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s->one = s->zero = s->zeroes = 0;
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do {
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L = wv_get_value(s, gb, 0, &last);
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if (last)
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break;
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R = wv_get_value(s, gb, 1, &last);
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if (last)
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break;
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for (i = 0; i < s->terms; i++) {
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t = s->decorr[i].value;
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if (t > 0) {
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if (t > 8) {
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if (t & 1) {
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A = 2 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1];
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B = 2 * s->decorr[i].samplesB[0] - s->decorr[i].samplesB[1];
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} else {
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A = (3 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]) >> 1;
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B = (3 * s->decorr[i].samplesB[0] - s->decorr[i].samplesB[1]) >> 1;
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}
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s->decorr[i].samplesA[1] = s->decorr[i].samplesA[0];
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s->decorr[i].samplesB[1] = s->decorr[i].samplesB[0];
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j = 0;
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} else {
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A = s->decorr[i].samplesA[pos];
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B = s->decorr[i].samplesB[pos];
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j = (pos + t) & 7;
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}
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if (type != AV_SAMPLE_FMT_S16P) {
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L2 = L + ((s->decorr[i].weightA * (int64_t)A + 512) >> 10);
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R2 = R + ((s->decorr[i].weightB * (int64_t)B + 512) >> 10);
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} else {
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L2 = L + ((s->decorr[i].weightA * A + 512) >> 10);
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R2 = R + ((s->decorr[i].weightB * B + 512) >> 10);
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}
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if (A && L)
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s->decorr[i].weightA -= ((((L ^ A) >> 30) & 2) - 1) * s->decorr[i].delta;
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if (B && R)
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s->decorr[i].weightB -= ((((R ^ B) >> 30) & 2) - 1) * s->decorr[i].delta;
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s->decorr[i].samplesA[j] = L = L2;
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s->decorr[i].samplesB[j] = R = R2;
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} else if (t == -1) {
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if (type != AV_SAMPLE_FMT_S16P)
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L2 = L + ((s->decorr[i].weightA * (int64_t)s->decorr[i].samplesA[0] + 512) >> 10);
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else
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L2 = L + ((s->decorr[i].weightA * s->decorr[i].samplesA[0] + 512) >> 10);
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UPDATE_WEIGHT_CLIP(s->decorr[i].weightA, s->decorr[i].delta, s->decorr[i].samplesA[0], L);
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L = L2;
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if (type != AV_SAMPLE_FMT_S16P)
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R2 = R + ((s->decorr[i].weightB * (int64_t)L2 + 512) >> 10);
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else
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R2 = R + ((s->decorr[i].weightB * L2 + 512) >> 10);
|
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UPDATE_WEIGHT_CLIP(s->decorr[i].weightB, s->decorr[i].delta, L2, R);
|
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R = R2;
|
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s->decorr[i].samplesA[0] = R;
|
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} else {
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if (type != AV_SAMPLE_FMT_S16P)
|
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R2 = R + ((s->decorr[i].weightB * (int64_t)s->decorr[i].samplesB[0] + 512) >> 10);
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else
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R2 = R + ((s->decorr[i].weightB * s->decorr[i].samplesB[0] + 512) >> 10);
|
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UPDATE_WEIGHT_CLIP(s->decorr[i].weightB, s->decorr[i].delta, s->decorr[i].samplesB[0], R);
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R = R2;
|
|
|
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if (t == -3) {
|
|
R2 = s->decorr[i].samplesA[0];
|
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s->decorr[i].samplesA[0] = R;
|
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}
|
|
|
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if (type != AV_SAMPLE_FMT_S16P)
|
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L2 = L + ((s->decorr[i].weightA * (int64_t)R2 + 512) >> 10);
|
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else
|
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L2 = L + ((s->decorr[i].weightA * R2 + 512) >> 10);
|
|
UPDATE_WEIGHT_CLIP(s->decorr[i].weightA, s->decorr[i].delta, R2, L);
|
|
L = L2;
|
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s->decorr[i].samplesB[0] = L;
|
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}
|
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}
|
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pos = (pos + 1) & 7;
|
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if (s->joint)
|
|
L += (R -= (L >> 1));
|
|
crc = (crc * 3 + L) * 3 + R;
|
|
|
|
if (type == AV_SAMPLE_FMT_FLTP) {
|
|
*dstfl_l++ = wv_get_value_float(s, &crc_extra_bits, L);
|
|
*dstfl_r++ = wv_get_value_float(s, &crc_extra_bits, R);
|
|
} else if (type == AV_SAMPLE_FMT_S32P) {
|
|
*dst32_l++ = wv_get_value_integer(s, &crc_extra_bits, L);
|
|
*dst32_r++ = wv_get_value_integer(s, &crc_extra_bits, R);
|
|
} else {
|
|
*dst16_l++ = wv_get_value_integer(s, &crc_extra_bits, L);
|
|
*dst16_r++ = wv_get_value_integer(s, &crc_extra_bits, R);
|
|
}
|
|
count++;
|
|
} while (!last && count < s->samples);
|
|
|
|
wv_reset_saved_context(s);
|
|
|
|
if (last && count < s->samples) {
|
|
int size = av_get_bytes_per_sample(type);
|
|
memset((uint8_t*)dst_l + count*size, 0, (s->samples-count)*size);
|
|
memset((uint8_t*)dst_r + count*size, 0, (s->samples-count)*size);
|
|
}
|
|
|
|
if ((s->avctx->err_recognition & AV_EF_CRCCHECK) &&
|
|
wv_check_crc(s, crc, crc_extra_bits))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int wv_unpack_mono(WavpackFrameContext *s, GetBitContext *gb,
|
|
void *dst, const int type)
|
|
{
|
|
int i, j, count = 0;
|
|
int last, t;
|
|
int A, S, T;
|
|
int pos = s->pos;
|
|
uint32_t crc = s->sc.crc;
|
|
uint32_t crc_extra_bits = s->extra_sc.crc;
|
|
int16_t *dst16 = dst;
|
|
int32_t *dst32 = dst;
|
|
float *dstfl = dst;
|
|
|
|
s->one = s->zero = s->zeroes = 0;
|
|
do {
|
|
T = wv_get_value(s, gb, 0, &last);
|
|
S = 0;
|
|
if (last)
|
|
break;
|
|
for (i = 0; i < s->terms; i++) {
|
|
t = s->decorr[i].value;
|
|
if (t > 8) {
|
|
if (t & 1)
|
|
A = 2 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1];
|
|
else
|
|
A = (3 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]) >> 1;
|
|
s->decorr[i].samplesA[1] = s->decorr[i].samplesA[0];
|
|
j = 0;
|
|
} else {
|
|
A = s->decorr[i].samplesA[pos];
|
|
j = (pos + t) & 7;
|
|
}
|
|
if (type != AV_SAMPLE_FMT_S16P)
|
|
S = T + ((s->decorr[i].weightA * (int64_t)A + 512) >> 10);
|
|
else
|
|
S = T + ((s->decorr[i].weightA * A + 512) >> 10);
|
|
if (A && T)
|
|
s->decorr[i].weightA -= ((((T ^ A) >> 30) & 2) - 1) * s->decorr[i].delta;
|
|
s->decorr[i].samplesA[j] = T = S;
|
|
}
|
|
pos = (pos + 1) & 7;
|
|
crc = crc * 3 + S;
|
|
|
|
if (type == AV_SAMPLE_FMT_FLTP) {
|
|
*dstfl++ = wv_get_value_float(s, &crc_extra_bits, S);
|
|
} else if (type == AV_SAMPLE_FMT_S32P) {
|
|
*dst32++ = wv_get_value_integer(s, &crc_extra_bits, S);
|
|
} else {
|
|
*dst16++ = wv_get_value_integer(s, &crc_extra_bits, S);
|
|
}
|
|
count++;
|
|
} while (!last && count < s->samples);
|
|
|
|
wv_reset_saved_context(s);
|
|
|
|
if (last && count < s->samples) {
|
|
int size = av_get_bytes_per_sample(type);
|
|
memset((uint8_t*)dst + count*size, 0, (s->samples-count)*size);
|
|
}
|
|
|
|
if (s->avctx->err_recognition & AV_EF_CRCCHECK) {
|
|
int ret = wv_check_crc(s, crc, crc_extra_bits);
|
|
if (ret < 0 && s->avctx->err_recognition & AV_EF_EXPLODE)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int wv_alloc_frame_context(WavpackContext *c)
|
|
{
|
|
if (c->fdec_num == WV_MAX_FRAME_DECODERS)
|
|
return -1;
|
|
|
|
c->fdec[c->fdec_num] = av_mallocz(sizeof(**c->fdec));
|
|
if (!c->fdec[c->fdec_num])
|
|
return -1;
|
|
c->fdec_num++;
|
|
c->fdec[c->fdec_num - 1]->avctx = c->avctx;
|
|
wv_reset_saved_context(c->fdec[c->fdec_num - 1]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int init_thread_copy(AVCodecContext *avctx)
|
|
{
|
|
WavpackContext *s = avctx->priv_data;
|
|
s->avctx = avctx;
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int wavpack_decode_init(AVCodecContext *avctx)
|
|
{
|
|
WavpackContext *s = avctx->priv_data;
|
|
|
|
s->avctx = avctx;
|
|
|
|
s->fdec_num = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int wavpack_decode_end(AVCodecContext *avctx)
|
|
{
|
|
WavpackContext *s = avctx->priv_data;
|
|
int i;
|
|
|
|
for (i = 0; i < s->fdec_num; i++)
|
|
av_freep(&s->fdec[i]);
|
|
s->fdec_num = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
|
|
AVFrame *frame, const uint8_t *buf, int buf_size)
|
|
{
|
|
WavpackContext *wc = avctx->priv_data;
|
|
ThreadFrame tframe = { .f = frame };
|
|
WavpackFrameContext *s;
|
|
GetByteContext gb;
|
|
void *samples_l = NULL, *samples_r = NULL;
|
|
int ret;
|
|
int got_terms = 0, got_weights = 0, got_samples = 0,
|
|
got_entropy = 0, got_bs = 0, got_float = 0, got_hybrid = 0;
|
|
int i, j, id, size, ssize, weights, t;
|
|
int bpp, chan = 0, chmask = 0, orig_bpp, sample_rate = 0;
|
|
int multiblock;
|
|
|
|
if (block_no >= wc->fdec_num && wv_alloc_frame_context(wc) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Error creating frame decode context\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
s = wc->fdec[block_no];
|
|
if (!s) {
|
|
av_log(avctx, AV_LOG_ERROR, "Context for block %d is not present\n",
|
|
block_no);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
memset(s->decorr, 0, MAX_TERMS * sizeof(Decorr));
|
|
memset(s->ch, 0, sizeof(s->ch));
|
|
s->extra_bits = 0;
|
|
s->and = s->or = s->shift = 0;
|
|
s->got_extra_bits = 0;
|
|
|
|
bytestream2_init(&gb, buf, buf_size);
|
|
|
|
s->samples = bytestream2_get_le32(&gb);
|
|
if (s->samples != wc->samples) {
|
|
av_log(avctx, AV_LOG_ERROR, "Mismatching number of samples in "
|
|
"a sequence: %d and %d\n", wc->samples, s->samples);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
s->frame_flags = bytestream2_get_le32(&gb);
|
|
bpp = av_get_bytes_per_sample(avctx->sample_fmt);
|
|
orig_bpp = ((s->frame_flags & 0x03) + 1) << 3;
|
|
multiblock = (s->frame_flags & WV_SINGLE_BLOCK) != WV_SINGLE_BLOCK;
|
|
|
|
s->stereo = !(s->frame_flags & WV_MONO);
|
|
s->stereo_in = (s->frame_flags & WV_FALSE_STEREO) ? 0 : s->stereo;
|
|
s->joint = s->frame_flags & WV_JOINT_STEREO;
|
|
s->hybrid = s->frame_flags & WV_HYBRID_MODE;
|
|
s->hybrid_bitrate = s->frame_flags & WV_HYBRID_BITRATE;
|
|
s->post_shift = bpp * 8 - orig_bpp + ((s->frame_flags >> 13) & 0x1f);
|
|
s->hybrid_maxclip = ((1LL << (orig_bpp - 1)) - 1);
|
|
s->hybrid_minclip = ((-1LL << (orig_bpp - 1)));
|
|
s->CRC = bytestream2_get_le32(&gb);
|
|
|
|
// parse metadata blocks
|
|
while (bytestream2_get_bytes_left(&gb)) {
|
|
id = bytestream2_get_byte(&gb);
|
|
size = bytestream2_get_byte(&gb);
|
|
if (id & WP_IDF_LONG) {
|
|
size |= (bytestream2_get_byte(&gb)) << 8;
|
|
size |= (bytestream2_get_byte(&gb)) << 16;
|
|
}
|
|
size <<= 1; // size is specified in words
|
|
ssize = size;
|
|
if (id & WP_IDF_ODD)
|
|
size--;
|
|
if (size < 0) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Got incorrect block %02X with size %i\n", id, size);
|
|
break;
|
|
}
|
|
if (bytestream2_get_bytes_left(&gb) < ssize) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Block size %i is out of bounds\n", size);
|
|
break;
|
|
}
|
|
switch (id & WP_IDF_MASK) {
|
|
case WP_ID_DECTERMS:
|
|
if (size > MAX_TERMS) {
|
|
av_log(avctx, AV_LOG_ERROR, "Too many decorrelation terms\n");
|
|
s->terms = 0;
|
|
bytestream2_skip(&gb, ssize);
|
|
continue;
|
|
}
|
|
s->terms = size;
|
|
for (i = 0; i < s->terms; i++) {
|
|
uint8_t val = bytestream2_get_byte(&gb);
|
|
s->decorr[s->terms - i - 1].value = (val & 0x1F) - 5;
|
|
s->decorr[s->terms - i - 1].delta = val >> 5;
|
|
}
|
|
got_terms = 1;
|
|
break;
|
|
case WP_ID_DECWEIGHTS:
|
|
if (!got_terms) {
|
|
av_log(avctx, AV_LOG_ERROR, "No decorrelation terms met\n");
|
|
continue;
|
|
}
|
|
weights = size >> s->stereo_in;
|
|
if (weights > MAX_TERMS || weights > s->terms) {
|
|
av_log(avctx, AV_LOG_ERROR, "Too many decorrelation weights\n");
|
|
bytestream2_skip(&gb, ssize);
|
|
continue;
|
|
}
|
|
for (i = 0; i < weights; i++) {
|
|
t = (int8_t)bytestream2_get_byte(&gb);
|
|
s->decorr[s->terms - i - 1].weightA = t << 3;
|
|
if (s->decorr[s->terms - i - 1].weightA > 0)
|
|
s->decorr[s->terms - i - 1].weightA +=
|
|
(s->decorr[s->terms - i - 1].weightA + 64) >> 7;
|
|
if (s->stereo_in) {
|
|
t = (int8_t)bytestream2_get_byte(&gb);
|
|
s->decorr[s->terms - i - 1].weightB = t << 3;
|
|
if (s->decorr[s->terms - i - 1].weightB > 0)
|
|
s->decorr[s->terms - i - 1].weightB +=
|
|
(s->decorr[s->terms - i - 1].weightB + 64) >> 7;
|
|
}
|
|
}
|
|
got_weights = 1;
|
|
break;
|
|
case WP_ID_DECSAMPLES:
|
|
if (!got_terms) {
|
|
av_log(avctx, AV_LOG_ERROR, "No decorrelation terms met\n");
|
|
continue;
|
|
}
|
|
t = 0;
|
|
for (i = s->terms - 1; (i >= 0) && (t < size); i--) {
|
|
if (s->decorr[i].value > 8) {
|
|
s->decorr[i].samplesA[0] =
|
|
wp_exp2(bytestream2_get_le16(&gb));
|
|
s->decorr[i].samplesA[1] =
|
|
wp_exp2(bytestream2_get_le16(&gb));
|
|
|
|
if (s->stereo_in) {
|
|
s->decorr[i].samplesB[0] =
|
|
wp_exp2(bytestream2_get_le16(&gb));
|
|
s->decorr[i].samplesB[1] =
|
|
wp_exp2(bytestream2_get_le16(&gb));
|
|
t += 4;
|
|
}
|
|
t += 4;
|
|
} else if (s->decorr[i].value < 0) {
|
|
s->decorr[i].samplesA[0] =
|
|
wp_exp2(bytestream2_get_le16(&gb));
|
|
s->decorr[i].samplesB[0] =
|
|
wp_exp2(bytestream2_get_le16(&gb));
|
|
t += 4;
|
|
} else {
|
|
for (j = 0; j < s->decorr[i].value; j++) {
|
|
s->decorr[i].samplesA[j] =
|
|
wp_exp2(bytestream2_get_le16(&gb));
|
|
if (s->stereo_in) {
|
|
s->decorr[i].samplesB[j] =
|
|
wp_exp2(bytestream2_get_le16(&gb));
|
|
}
|
|
}
|
|
t += s->decorr[i].value * 2 * (s->stereo_in + 1);
|
|
}
|
|
}
|
|
got_samples = 1;
|
|
break;
|
|
case WP_ID_ENTROPY:
|
|
if (size != 6 * (s->stereo_in + 1)) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Entropy vars size should be %i, got %i.\n",
|
|
6 * (s->stereo_in + 1), size);
|
|
bytestream2_skip(&gb, ssize);
|
|
continue;
|
|
}
|
|
for (j = 0; j <= s->stereo_in; j++)
|
|
for (i = 0; i < 3; i++) {
|
|
s->ch[j].median[i] = wp_exp2(bytestream2_get_le16(&gb));
|
|
}
|
|
got_entropy = 1;
|
|
break;
|
|
case WP_ID_HYBRID:
|
|
if (s->hybrid_bitrate) {
|
|
for (i = 0; i <= s->stereo_in; i++) {
|
|
s->ch[i].slow_level = wp_exp2(bytestream2_get_le16(&gb));
|
|
size -= 2;
|
|
}
|
|
}
|
|
for (i = 0; i < (s->stereo_in + 1); i++) {
|
|
s->ch[i].bitrate_acc = bytestream2_get_le16(&gb) << 16;
|
|
size -= 2;
|
|
}
|
|
if (size > 0) {
|
|
for (i = 0; i < (s->stereo_in + 1); i++) {
|
|
s->ch[i].bitrate_delta =
|
|
wp_exp2((int16_t)bytestream2_get_le16(&gb));
|
|
}
|
|
} else {
|
|
for (i = 0; i < (s->stereo_in + 1); i++)
|
|
s->ch[i].bitrate_delta = 0;
|
|
}
|
|
got_hybrid = 1;
|
|
break;
|
|
case WP_ID_INT32INFO: {
|
|
uint8_t val[4];
|
|
if (size != 4) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Invalid INT32INFO, size = %i\n",
|
|
size);
|
|
bytestream2_skip(&gb, ssize - 4);
|
|
continue;
|
|
}
|
|
bytestream2_get_buffer(&gb, val, 4);
|
|
if (val[0]) {
|
|
s->extra_bits = val[0];
|
|
} else if (val[1]) {
|
|
s->shift = val[1];
|
|
} else if (val[2]) {
|
|
s->and = s->or = 1;
|
|
s->shift = val[2];
|
|
} else if (val[3]) {
|
|
s->and = 1;
|
|
s->shift = val[3];
|
|
}
|
|
/* original WavPack decoder forces 32-bit lossy sound to be treated
|
|
* as 24-bit one in order to have proper clipping */
|
|
if (s->hybrid && bpp == 4 && s->post_shift < 8 && s->shift > 8) {
|
|
s->post_shift += 8;
|
|
s->shift -= 8;
|
|
s->hybrid_maxclip >>= 8;
|
|
s->hybrid_minclip >>= 8;
|
|
}
|
|
break;
|
|
}
|
|
case WP_ID_FLOATINFO:
|
|
if (size != 4) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Invalid FLOATINFO, size = %i\n", size);
|
|
bytestream2_skip(&gb, ssize);
|
|
continue;
|
|
}
|
|
s->float_flag = bytestream2_get_byte(&gb);
|
|
s->float_shift = bytestream2_get_byte(&gb);
|
|
s->float_max_exp = bytestream2_get_byte(&gb);
|
|
got_float = 1;
|
|
bytestream2_skip(&gb, 1);
|
|
break;
|
|
case WP_ID_DATA:
|
|
s->sc.offset = bytestream2_tell(&gb);
|
|
s->sc.size = size * 8;
|
|
if ((ret = init_get_bits8(&s->gb, gb.buffer, size)) < 0)
|
|
return ret;
|
|
s->data_size = size * 8;
|
|
bytestream2_skip(&gb, size);
|
|
got_bs = 1;
|
|
break;
|
|
case WP_ID_EXTRABITS:
|
|
if (size <= 4) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid EXTRABITS, size = %i\n",
|
|
size);
|
|
bytestream2_skip(&gb, size);
|
|
continue;
|
|
}
|
|
s->extra_sc.offset = bytestream2_tell(&gb);
|
|
s->extra_sc.size = size * 8;
|
|
if ((ret = init_get_bits8(&s->gb_extra_bits, gb.buffer, size)) < 0)
|
|
return ret;
|
|
s->crc_extra_bits = get_bits_long(&s->gb_extra_bits, 32);
|
|
bytestream2_skip(&gb, size);
|
|
s->got_extra_bits = 1;
|
|
break;
|
|
case WP_ID_CHANINFO:
|
|
if (size <= 1) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Insufficient channel information\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
chan = bytestream2_get_byte(&gb);
|
|
switch (size - 2) {
|
|
case 0:
|
|
chmask = bytestream2_get_byte(&gb);
|
|
break;
|
|
case 1:
|
|
chmask = bytestream2_get_le16(&gb);
|
|
break;
|
|
case 2:
|
|
chmask = bytestream2_get_le24(&gb);
|
|
break;
|
|
case 3:
|
|
chmask = bytestream2_get_le32(&gb);
|
|
break;
|
|
case 5:
|
|
size = bytestream2_get_byte(&gb);
|
|
if (avctx->channels != size)
|
|
av_log(avctx, AV_LOG_WARNING, "%i channels signalled"
|
|
" instead of %i.\n", size, avctx->channels);
|
|
chan |= (bytestream2_get_byte(&gb) & 0xF) << 8;
|
|
chmask = bytestream2_get_le16(&gb);
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid channel info size %d\n",
|
|
size);
|
|
chan = avctx->channels;
|
|
chmask = avctx->channel_layout;
|
|
}
|
|
break;
|
|
case WP_ID_SAMPLE_RATE:
|
|
if (size != 3) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid custom sample rate.\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
sample_rate = bytestream2_get_le24(&gb);
|
|
break;
|
|
default:
|
|
bytestream2_skip(&gb, size);
|
|
}
|
|
if (id & WP_IDF_ODD)
|
|
bytestream2_skip(&gb, 1);
|
|
}
|
|
|
|
if (!got_terms) {
|
|
av_log(avctx, AV_LOG_ERROR, "No block with decorrelation terms\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (!got_weights) {
|
|
av_log(avctx, AV_LOG_ERROR, "No block with decorrelation weights\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (!got_samples) {
|
|
av_log(avctx, AV_LOG_ERROR, "No block with decorrelation samples\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (!got_entropy) {
|
|
av_log(avctx, AV_LOG_ERROR, "No block with entropy info\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (s->hybrid && !got_hybrid) {
|
|
av_log(avctx, AV_LOG_ERROR, "Hybrid config not found\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (!got_bs) {
|
|
av_log(avctx, AV_LOG_ERROR, "Packed samples not found\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (!got_float && avctx->sample_fmt == AV_SAMPLE_FMT_FLTP) {
|
|
av_log(avctx, AV_LOG_ERROR, "Float information not found\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (s->got_extra_bits && avctx->sample_fmt != AV_SAMPLE_FMT_FLTP) {
|
|
const int size = get_bits_left(&s->gb_extra_bits);
|
|
const int wanted = s->samples * s->extra_bits << s->stereo_in;
|
|
if (size < wanted) {
|
|
av_log(avctx, AV_LOG_ERROR, "Too small EXTRABITS\n");
|
|
s->got_extra_bits = 0;
|
|
}
|
|
}
|
|
|
|
if (!wc->ch_offset) {
|
|
int sr = (s->frame_flags >> 23) & 0xf;
|
|
if (sr == 0xf) {
|
|
if (!sample_rate) {
|
|
av_log(avctx, AV_LOG_ERROR, "Custom sample rate missing.\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
avctx->sample_rate = sample_rate;
|
|
} else
|
|
avctx->sample_rate = wv_rates[sr];
|
|
|
|
if (multiblock) {
|
|
if (chan)
|
|
avctx->channels = chan;
|
|
if (chmask)
|
|
avctx->channel_layout = chmask;
|
|
} else {
|
|
avctx->channels = s->stereo ? 2 : 1;
|
|
avctx->channel_layout = s->stereo ? AV_CH_LAYOUT_STEREO :
|
|
AV_CH_LAYOUT_MONO;
|
|
}
|
|
|
|
/* get output buffer */
|
|
frame->nb_samples = s->samples + 1;
|
|
if ((ret = ff_thread_get_buffer(avctx, &tframe, 0)) < 0)
|
|
return ret;
|
|
frame->nb_samples = s->samples;
|
|
}
|
|
|
|
if (wc->ch_offset + s->stereo >= avctx->channels) {
|
|
av_log(avctx, AV_LOG_WARNING, "Too many channels coded in a packet.\n");
|
|
return (avctx->err_recognition & AV_EF_EXPLODE) ? AVERROR_INVALIDDATA : 0;
|
|
}
|
|
|
|
samples_l = frame->extended_data[wc->ch_offset];
|
|
if (s->stereo)
|
|
samples_r = frame->extended_data[wc->ch_offset + 1];
|
|
|
|
wc->ch_offset += 1 + s->stereo;
|
|
|
|
if (s->stereo_in) {
|
|
ret = wv_unpack_stereo(s, &s->gb, samples_l, samples_r, avctx->sample_fmt);
|
|
if (ret < 0)
|
|
return ret;
|
|
} else {
|
|
ret = wv_unpack_mono(s, &s->gb, samples_l, avctx->sample_fmt);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (s->stereo)
|
|
memcpy(samples_r, samples_l, bpp * s->samples);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void wavpack_decode_flush(AVCodecContext *avctx)
|
|
{
|
|
WavpackContext *s = avctx->priv_data;
|
|
int i;
|
|
|
|
for (i = 0; i < s->fdec_num; i++)
|
|
wv_reset_saved_context(s->fdec[i]);
|
|
}
|
|
|
|
static int wavpack_decode_frame(AVCodecContext *avctx, void *data,
|
|
int *got_frame_ptr, AVPacket *avpkt)
|
|
{
|
|
WavpackContext *s = avctx->priv_data;
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
AVFrame *frame = data;
|
|
int frame_size, ret, frame_flags;
|
|
|
|
if (avpkt->size <= WV_HEADER_SIZE)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
s->block = 0;
|
|
s->ch_offset = 0;
|
|
|
|
/* determine number of samples */
|
|
s->samples = AV_RL32(buf + 20);
|
|
frame_flags = AV_RL32(buf + 24);
|
|
if (s->samples <= 0 || s->samples > WV_MAX_SAMPLES) {
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid number of samples: %d\n",
|
|
s->samples);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (frame_flags & 0x80) {
|
|
avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
|
|
} else if ((frame_flags & 0x03) <= 1) {
|
|
avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
|
|
} else {
|
|
avctx->sample_fmt = AV_SAMPLE_FMT_S32P;
|
|
avctx->bits_per_raw_sample = ((frame_flags & 0x03) + 1) << 3;
|
|
}
|
|
|
|
while (buf_size > 0) {
|
|
if (buf_size <= WV_HEADER_SIZE)
|
|
break;
|
|
frame_size = AV_RL32(buf + 4) - 12;
|
|
buf += 20;
|
|
buf_size -= 20;
|
|
if (frame_size <= 0 || frame_size > buf_size) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Block %d has invalid size (size %d vs. %d bytes left)\n",
|
|
s->block, frame_size, buf_size);
|
|
wavpack_decode_flush(avctx);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if ((ret = wavpack_decode_block(avctx, s->block,
|
|
frame, buf, frame_size)) < 0) {
|
|
wavpack_decode_flush(avctx);
|
|
return ret;
|
|
}
|
|
s->block++;
|
|
buf += frame_size;
|
|
buf_size -= frame_size;
|
|
}
|
|
|
|
if (s->ch_offset != avctx->channels) {
|
|
av_log(avctx, AV_LOG_ERROR, "Not enough channels coded in a packet.\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
*got_frame_ptr = 1;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
AVCodec ff_wavpack_decoder = {
|
|
.name = "wavpack",
|
|
.long_name = NULL_IF_CONFIG_SMALL("WavPack"),
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.id = AV_CODEC_ID_WAVPACK,
|
|
.priv_data_size = sizeof(WavpackContext),
|
|
.init = wavpack_decode_init,
|
|
.close = wavpack_decode_end,
|
|
.decode = wavpack_decode_frame,
|
|
.flush = wavpack_decode_flush,
|
|
.init_thread_copy = ONLY_IF_THREADS_ENABLED(init_thread_copy),
|
|
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
|
|
};
|