mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-24 03:39:45 +00:00
1ec94b0f06
Coccinelle profile used:
@@
expression r, ctx, f, loglevel, str, flags;
@@
-if ((r = ff_get_buffer(ctx, f, flags)) < 0) {
- av_log(ctx, loglevel, str);
- return r;
-}
+if ((r = ff_get_buffer(ctx, f, flags)) < 0)
+ return r;
@@
expression r, ctx, f, loglevel, str;
@@
-if ((r = ff_reget_buffer(ctx, f)) < 0) {
- av_log(ctx, loglevel, str);
- return r;
-}
+if ((r = ff_reget_buffer(ctx, f)) < 0)
+ return r;
@@
expression r, ctx, f, loglevel, str, flags;
@@
-if ((r = ff_thread_get_buffer(ctx, f, flags)) < 0) {
- av_log(ctx, loglevel, str);
- return r;
-}
+if ((r = ff_thread_get_buffer(ctx, f, flags)) < 0)
+ return r;
...along with some manual patches for the remaining ones.
516 lines
16 KiB
C
516 lines
16 KiB
C
/*
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* TTA (The Lossless True Audio) decoder
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* Copyright (c) 2006 Alex Beregszaszi
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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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/**
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* @file
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* TTA (The Lossless True Audio) decoder
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* @see http://www.true-audio.com/
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* @see http://tta.corecodec.org/
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* @author Alex Beregszaszi
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*/
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#define BITSTREAM_READER_LE
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//#define DEBUG
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#include <limits.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 "libavutil/crc.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/opt.h"
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#define FORMAT_SIMPLE 1
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#define FORMAT_ENCRYPTED 2
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#define MAX_ORDER 16
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typedef struct TTAFilter {
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int32_t shift, round, error;
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int32_t qm[MAX_ORDER];
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int32_t dx[MAX_ORDER];
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int32_t dl[MAX_ORDER];
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} TTAFilter;
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typedef struct TTARice {
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uint32_t k0, k1, sum0, sum1;
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} TTARice;
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typedef struct TTAChannel {
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int32_t predictor;
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TTAFilter filter;
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TTARice rice;
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} TTAChannel;
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typedef struct TTAContext {
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AVClass *class;
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AVCodecContext *avctx;
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GetBitContext gb;
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const AVCRC *crc_table;
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int format, channels, bps;
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unsigned data_length;
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int frame_length, last_frame_length;
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int32_t *decode_buffer;
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uint8_t crc_pass[8];
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uint8_t *pass;
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TTAChannel *ch_ctx;
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} TTAContext;
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static const uint32_t shift_1[] = {
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0x00000001, 0x00000002, 0x00000004, 0x00000008,
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0x00000010, 0x00000020, 0x00000040, 0x00000080,
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0x00000100, 0x00000200, 0x00000400, 0x00000800,
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0x00001000, 0x00002000, 0x00004000, 0x00008000,
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0x00010000, 0x00020000, 0x00040000, 0x00080000,
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0x00100000, 0x00200000, 0x00400000, 0x00800000,
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0x01000000, 0x02000000, 0x04000000, 0x08000000,
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0x10000000, 0x20000000, 0x40000000, 0x80000000,
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0x80000000, 0x80000000, 0x80000000, 0x80000000,
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0x80000000, 0x80000000, 0x80000000, 0x80000000
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};
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static const uint32_t * const shift_16 = shift_1 + 4;
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static const int32_t ttafilter_configs[4] = {
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10,
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9,
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10,
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12
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};
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static void ttafilter_init(TTAContext *s, TTAFilter *c, int32_t shift) {
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memset(c, 0, sizeof(TTAFilter));
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if (s->format == FORMAT_ENCRYPTED) {
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int i;
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for (i = 0; i < 8; i++)
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c->qm[i] = sign_extend(s->crc_pass[i], 8);
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}
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c->shift = shift;
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c->round = shift_1[shift-1];
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// c->round = 1 << (shift - 1);
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}
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static inline void ttafilter_process(TTAFilter *c, int32_t *in)
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{
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register int32_t *dl = c->dl, *qm = c->qm, *dx = c->dx, sum = c->round;
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if (c->error < 0) {
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qm[0] -= dx[0]; qm[1] -= dx[1]; qm[2] -= dx[2]; qm[3] -= dx[3];
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qm[4] -= dx[4]; qm[5] -= dx[5]; qm[6] -= dx[6]; qm[7] -= dx[7];
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} else if (c->error > 0) {
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qm[0] += dx[0]; qm[1] += dx[1]; qm[2] += dx[2]; qm[3] += dx[3];
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qm[4] += dx[4]; qm[5] += dx[5]; qm[6] += dx[6]; qm[7] += dx[7];
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}
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sum += dl[0] * qm[0] + dl[1] * qm[1] + dl[2] * qm[2] + dl[3] * qm[3] +
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dl[4] * qm[4] + dl[5] * qm[5] + dl[6] * qm[6] + dl[7] * qm[7];
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dx[0] = dx[1]; dx[1] = dx[2]; dx[2] = dx[3]; dx[3] = dx[4];
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dl[0] = dl[1]; dl[1] = dl[2]; dl[2] = dl[3]; dl[3] = dl[4];
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dx[4] = ((dl[4] >> 30) | 1);
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dx[5] = ((dl[5] >> 30) | 2) & ~1;
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dx[6] = ((dl[6] >> 30) | 2) & ~1;
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dx[7] = ((dl[7] >> 30) | 4) & ~3;
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c->error = *in;
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*in += (sum >> c->shift);
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dl[4] = -dl[5]; dl[5] = -dl[6];
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dl[6] = *in - dl[7]; dl[7] = *in;
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dl[5] += dl[6]; dl[4] += dl[5];
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}
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static void rice_init(TTARice *c, uint32_t k0, uint32_t k1)
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{
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c->k0 = k0;
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c->k1 = k1;
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c->sum0 = shift_16[k0];
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c->sum1 = shift_16[k1];
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}
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static int tta_get_unary(GetBitContext *gb)
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{
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int ret = 0;
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// count ones
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while (get_bits_left(gb) > 0 && get_bits1(gb))
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ret++;
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return ret;
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}
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static const int64_t tta_channel_layouts[7] = {
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AV_CH_LAYOUT_STEREO,
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AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY,
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AV_CH_LAYOUT_QUAD,
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0,
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AV_CH_LAYOUT_5POINT1_BACK,
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AV_CH_LAYOUT_5POINT1_BACK|AV_CH_BACK_CENTER,
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AV_CH_LAYOUT_7POINT1_WIDE
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};
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static int tta_check_crc(TTAContext *s, const uint8_t *buf, int buf_size)
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{
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uint32_t crc, CRC;
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CRC = AV_RL32(buf + buf_size);
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crc = av_crc(s->crc_table, 0xFFFFFFFFU, buf, buf_size);
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if (CRC != (crc ^ 0xFFFFFFFFU)) {
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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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return 0;
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}
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static uint64_t tta_check_crc64(uint8_t *pass)
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{
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uint64_t crc = UINT64_MAX, poly = 0x42F0E1EBA9EA3693U;
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uint8_t *end = pass + strlen(pass);
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int i;
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while (pass < end) {
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crc ^= (uint64_t)*pass++ << 56;
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for (i = 0; i < 8; i++)
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crc = (crc << 1) ^ (poly & (((int64_t) crc) >> 63));
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}
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return crc ^ UINT64_MAX;
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}
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static av_cold int tta_decode_init(AVCodecContext * avctx)
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{
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TTAContext *s = avctx->priv_data;
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int total_frames;
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s->avctx = avctx;
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// 30bytes includes a seektable with one frame
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if (avctx->extradata_size < 30)
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return AVERROR_INVALIDDATA;
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init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
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if (show_bits_long(&s->gb, 32) == AV_RL32("TTA1"))
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{
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if (avctx->err_recognition & AV_EF_CRCCHECK) {
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s->crc_table = av_crc_get_table(AV_CRC_32_IEEE_LE);
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tta_check_crc(s, avctx->extradata, 18);
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}
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/* signature */
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skip_bits_long(&s->gb, 32);
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s->format = get_bits(&s->gb, 16);
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if (s->format > 2) {
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av_log(avctx, AV_LOG_ERROR, "Invalid format\n");
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return AVERROR_INVALIDDATA;
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}
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if (s->format == FORMAT_ENCRYPTED) {
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if (!s->pass) {
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av_log(avctx, AV_LOG_ERROR, "Missing password for encrypted stream. Please use the -password option\n");
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return AVERROR(EINVAL);
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}
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AV_WL64(s->crc_pass, tta_check_crc64(s->pass));
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}
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avctx->channels = s->channels = get_bits(&s->gb, 16);
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if (s->channels > 1 && s->channels < 9)
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avctx->channel_layout = tta_channel_layouts[s->channels-2];
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avctx->bits_per_raw_sample = get_bits(&s->gb, 16);
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s->bps = (avctx->bits_per_raw_sample + 7) / 8;
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avctx->sample_rate = get_bits_long(&s->gb, 32);
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s->data_length = get_bits_long(&s->gb, 32);
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skip_bits_long(&s->gb, 32); // CRC32 of header
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if (s->channels == 0) {
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av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
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return AVERROR_INVALIDDATA;
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} else if (avctx->sample_rate == 0) {
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av_log(avctx, AV_LOG_ERROR, "Invalid samplerate\n");
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return AVERROR_INVALIDDATA;
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}
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switch(s->bps) {
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case 1: avctx->sample_fmt = AV_SAMPLE_FMT_U8; break;
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case 2:
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avctx->sample_fmt = AV_SAMPLE_FMT_S16;
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break;
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case 3:
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avctx->sample_fmt = AV_SAMPLE_FMT_S32;
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break;
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//case 4: avctx->sample_fmt = AV_SAMPLE_FMT_S32; break;
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default:
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av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported sample format.\n");
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return AVERROR_INVALIDDATA;
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}
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// prevent overflow
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if (avctx->sample_rate > 0x7FFFFFu) {
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av_log(avctx, AV_LOG_ERROR, "sample_rate too large\n");
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return AVERROR(EINVAL);
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}
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s->frame_length = 256 * avctx->sample_rate / 245;
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s->last_frame_length = s->data_length % s->frame_length;
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total_frames = s->data_length / s->frame_length +
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(s->last_frame_length ? 1 : 0);
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av_log(avctx, AV_LOG_DEBUG, "format: %d chans: %d bps: %d rate: %d block: %d\n",
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s->format, avctx->channels, avctx->bits_per_coded_sample, avctx->sample_rate,
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avctx->block_align);
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av_log(avctx, AV_LOG_DEBUG, "data_length: %d frame_length: %d last: %d total: %d\n",
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s->data_length, s->frame_length, s->last_frame_length, total_frames);
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// FIXME: seek table
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if (avctx->extradata_size <= 26 || total_frames > INT_MAX / 4 ||
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avctx->extradata_size - 26 < total_frames * 4)
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av_log(avctx, AV_LOG_WARNING, "Seek table missing or too small\n");
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else if (avctx->err_recognition & AV_EF_CRCCHECK) {
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if (tta_check_crc(s, avctx->extradata + 22, total_frames * 4))
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return AVERROR_INVALIDDATA;
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}
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skip_bits_long(&s->gb, 32 * total_frames);
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skip_bits_long(&s->gb, 32); // CRC32 of seektable
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if(s->frame_length >= UINT_MAX / (s->channels * sizeof(int32_t))){
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av_log(avctx, AV_LOG_ERROR, "frame_length too large\n");
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return AVERROR_INVALIDDATA;
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}
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if (s->bps < 3) {
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s->decode_buffer = av_mallocz(sizeof(int32_t)*s->frame_length*s->channels);
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if (!s->decode_buffer)
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return AVERROR(ENOMEM);
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} else
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s->decode_buffer = NULL;
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s->ch_ctx = av_malloc(avctx->channels * sizeof(*s->ch_ctx));
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if (!s->ch_ctx) {
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av_freep(&s->decode_buffer);
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return AVERROR(ENOMEM);
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}
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} else {
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av_log(avctx, AV_LOG_ERROR, "Wrong extradata present\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 int tta_decode_frame(AVCodecContext *avctx, void *data,
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int *got_frame_ptr, AVPacket *avpkt)
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{
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AVFrame *frame = data;
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const uint8_t *buf = avpkt->data;
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int buf_size = avpkt->size;
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TTAContext *s = avctx->priv_data;
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int i, ret;
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int cur_chan = 0, framelen = s->frame_length;
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int32_t *p;
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if (avctx->err_recognition & AV_EF_CRCCHECK) {
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if (buf_size < 4 || tta_check_crc(s, buf, buf_size - 4))
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return AVERROR_INVALIDDATA;
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}
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init_get_bits(&s->gb, buf, buf_size*8);
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/* get output buffer */
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frame->nb_samples = framelen;
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if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
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return ret;
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// decode directly to output buffer for 24-bit sample format
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if (s->bps == 3)
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s->decode_buffer = (int32_t *)frame->data[0];
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// init per channel states
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for (i = 0; i < s->channels; i++) {
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s->ch_ctx[i].predictor = 0;
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ttafilter_init(s, &s->ch_ctx[i].filter, ttafilter_configs[s->bps-1]);
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rice_init(&s->ch_ctx[i].rice, 10, 10);
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}
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i = 0;
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for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++) {
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int32_t *predictor = &s->ch_ctx[cur_chan].predictor;
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TTAFilter *filter = &s->ch_ctx[cur_chan].filter;
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TTARice *rice = &s->ch_ctx[cur_chan].rice;
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uint32_t unary, depth, k;
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int32_t value;
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unary = tta_get_unary(&s->gb);
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if (unary == 0) {
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depth = 0;
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k = rice->k0;
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} else {
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depth = 1;
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k = rice->k1;
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unary--;
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}
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if (get_bits_left(&s->gb) < k) {
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ret = AVERROR_INVALIDDATA;
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goto error;
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}
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if (k) {
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if (k > MIN_CACHE_BITS) {
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ret = AVERROR_INVALIDDATA;
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goto error;
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}
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value = (unary << k) + get_bits(&s->gb, k);
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} else
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value = unary;
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// FIXME: copy paste from original
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switch (depth) {
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case 1:
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rice->sum1 += value - (rice->sum1 >> 4);
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if (rice->k1 > 0 && rice->sum1 < shift_16[rice->k1])
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rice->k1--;
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else if(rice->sum1 > shift_16[rice->k1 + 1])
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rice->k1++;
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value += shift_1[rice->k0];
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default:
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rice->sum0 += value - (rice->sum0 >> 4);
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if (rice->k0 > 0 && rice->sum0 < shift_16[rice->k0])
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rice->k0--;
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else if(rice->sum0 > shift_16[rice->k0 + 1])
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rice->k0++;
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}
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// extract coded value
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*p = 1 + ((value >> 1) ^ ((value & 1) - 1));
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// run hybrid filter
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ttafilter_process(filter, p);
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// fixed order prediction
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#define PRED(x, k) (int32_t)((((uint64_t)x << k) - x) >> k)
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switch (s->bps) {
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case 1: *p += PRED(*predictor, 4); break;
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case 2:
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case 3: *p += PRED(*predictor, 5); break;
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case 4: *p += *predictor; break;
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}
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*predictor = *p;
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// flip channels
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if (cur_chan < (s->channels-1))
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cur_chan++;
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else {
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// decorrelate in case of multiple channels
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if (s->channels > 1) {
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int32_t *r = p - 1;
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for (*p += *r / 2; r > p - s->channels; r--)
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*r = *(r + 1) - *r;
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}
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cur_chan = 0;
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i++;
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// check for last frame
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if (i == s->last_frame_length && get_bits_left(&s->gb) / 8 == 4) {
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frame->nb_samples = framelen = s->last_frame_length;
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break;
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}
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}
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}
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align_get_bits(&s->gb);
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if (get_bits_left(&s->gb) < 32) {
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ret = AVERROR_INVALIDDATA;
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goto error;
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}
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skip_bits_long(&s->gb, 32); // frame crc
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// convert to output buffer
|
|
switch (s->bps) {
|
|
case 1: {
|
|
uint8_t *samples = (uint8_t *)frame->data[0];
|
|
for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++)
|
|
*samples++ = *p + 0x80;
|
|
break;
|
|
}
|
|
case 2: {
|
|
int16_t *samples = (int16_t *)frame->data[0];
|
|
for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++)
|
|
*samples++ = *p;
|
|
break;
|
|
}
|
|
case 3: {
|
|
// shift samples for 24-bit sample format
|
|
int32_t *samples = (int32_t *)frame->data[0];
|
|
for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++)
|
|
*samples++ <<= 8;
|
|
// reset decode buffer
|
|
s->decode_buffer = NULL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
*got_frame_ptr = 1;
|
|
|
|
return buf_size;
|
|
error:
|
|
// reset decode buffer
|
|
if (s->bps == 3)
|
|
s->decode_buffer = NULL;
|
|
return ret;
|
|
}
|
|
|
|
static av_cold int tta_decode_close(AVCodecContext *avctx) {
|
|
TTAContext *s = avctx->priv_data;
|
|
|
|
if (s->bps < 3)
|
|
av_free(s->decode_buffer);
|
|
s->decode_buffer = NULL;
|
|
av_freep(&s->ch_ctx);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(TTAContext, x)
|
|
#define DEC (AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM)
|
|
static const AVOption options[] = {
|
|
{ "password", "Set decoding password", OFFSET(pass), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, DEC },
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass tta_decoder_class = {
|
|
.class_name = "TTA Decoder",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVCodec ff_tta_decoder = {
|
|
.name = "tta",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.id = AV_CODEC_ID_TTA,
|
|
.priv_data_size = sizeof(TTAContext),
|
|
.init = tta_decode_init,
|
|
.close = tta_decode_close,
|
|
.decode = tta_decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("TTA (True Audio)"),
|
|
.priv_class = &tta_decoder_class,
|
|
};
|