mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-12-05 01:56:41 +00:00
6101e5322f
* qatar/master: rtpdec_asf: Set the no_resync_search option for the chained asf demuxer asfdec: Add an option for not searching for the packet markers cosmetics: Clean up the tiffenc pix_fmts declaration to match the style of others cosmetics: Align codec declarations cosmetics: Convert mimic.c to utf-8 avconv: remove an unused function parameter. avconv: remove now pointless variables. avconv: drop support for building without libavfilter. nellymoserenc: fix crash due to memsetting the wrong area. libavformat: Only require first packet to be known for audio/video streams avplay: Don't try to scale timestamps if the tb isn't set Conflicts: Changelog configure ffmpeg.c libavcodec/aacenc.c libavcodec/bmpenc.c libavcodec/dnxhddec.c libavcodec/dnxhdenc.c libavcodec/ffv1.c libavcodec/flacenc.c libavcodec/fraps.c libavcodec/huffyuv.c libavcodec/libopenjpegdec.c libavcodec/mpeg12enc.c libavcodec/mpeg4videodec.c libavcodec/pamenc.c libavcodec/pgssubdec.c libavcodec/pngenc.c libavcodec/qtrleenc.c libavcodec/rawdec.c libavcodec/sgienc.c libavcodec/tiffenc.c libavcodec/v210dec.c libavcodec/wmv2dec.c libavformat/utils.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
477 lines
14 KiB
C
477 lines
14 KiB
C
/*
|
|
* TTA (The Lossless True Audio) decoder
|
|
* Copyright (c) 2006 Alex Beregszaszi
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* TTA (The Lossless True Audio) decoder
|
|
* @see http://www.true-audio.com/
|
|
* @see http://tta.corecodec.org/
|
|
* @author Alex Beregszaszi
|
|
*/
|
|
|
|
#define BITSTREAM_READER_LE
|
|
//#define DEBUG
|
|
#include <limits.h>
|
|
#include "avcodec.h"
|
|
#include "get_bits.h"
|
|
#include "libavutil/crc.h"
|
|
|
|
#define FORMAT_SIMPLE 1
|
|
#define FORMAT_ENCRYPTED 2
|
|
|
|
#define MAX_ORDER 16
|
|
typedef struct TTAFilter {
|
|
int32_t shift, round, error;
|
|
int32_t qm[MAX_ORDER];
|
|
int32_t dx[MAX_ORDER];
|
|
int32_t dl[MAX_ORDER];
|
|
} TTAFilter;
|
|
|
|
typedef struct TTARice {
|
|
uint32_t k0, k1, sum0, sum1;
|
|
} TTARice;
|
|
|
|
typedef struct TTAChannel {
|
|
int32_t predictor;
|
|
TTAFilter filter;
|
|
TTARice rice;
|
|
} TTAChannel;
|
|
|
|
typedef struct TTAContext {
|
|
AVCodecContext *avctx;
|
|
AVFrame frame;
|
|
GetBitContext gb;
|
|
const AVCRC *crc_table;
|
|
|
|
int format, channels, bps, data_length;
|
|
int frame_length, last_frame_length, total_frames;
|
|
|
|
int32_t *decode_buffer;
|
|
|
|
TTAChannel *ch_ctx;
|
|
} TTAContext;
|
|
|
|
static const uint32_t shift_1[] = {
|
|
0x00000001, 0x00000002, 0x00000004, 0x00000008,
|
|
0x00000010, 0x00000020, 0x00000040, 0x00000080,
|
|
0x00000100, 0x00000200, 0x00000400, 0x00000800,
|
|
0x00001000, 0x00002000, 0x00004000, 0x00008000,
|
|
0x00010000, 0x00020000, 0x00040000, 0x00080000,
|
|
0x00100000, 0x00200000, 0x00400000, 0x00800000,
|
|
0x01000000, 0x02000000, 0x04000000, 0x08000000,
|
|
0x10000000, 0x20000000, 0x40000000, 0x80000000,
|
|
0x80000000, 0x80000000, 0x80000000, 0x80000000,
|
|
0x80000000, 0x80000000, 0x80000000, 0x80000000
|
|
};
|
|
|
|
static const uint32_t * const shift_16 = shift_1 + 4;
|
|
|
|
static const int32_t ttafilter_configs[4] = {
|
|
10,
|
|
9,
|
|
10,
|
|
12
|
|
};
|
|
|
|
static void ttafilter_init(TTAFilter *c, int32_t shift) {
|
|
memset(c, 0, sizeof(TTAFilter));
|
|
c->shift = shift;
|
|
c->round = shift_1[shift-1];
|
|
// c->round = 1 << (shift - 1);
|
|
}
|
|
|
|
static inline void ttafilter_process(TTAFilter *c, int32_t *in)
|
|
{
|
|
register int32_t *dl = c->dl, *qm = c->qm, *dx = c->dx, sum = c->round;
|
|
|
|
if (c->error < 0) {
|
|
qm[0] -= dx[0]; qm[1] -= dx[1]; qm[2] -= dx[2]; qm[3] -= dx[3];
|
|
qm[4] -= dx[4]; qm[5] -= dx[5]; qm[6] -= dx[6]; qm[7] -= dx[7];
|
|
} else if (c->error > 0) {
|
|
qm[0] += dx[0]; qm[1] += dx[1]; qm[2] += dx[2]; qm[3] += dx[3];
|
|
qm[4] += dx[4]; qm[5] += dx[5]; qm[6] += dx[6]; qm[7] += dx[7];
|
|
}
|
|
|
|
sum += dl[0] * qm[0] + dl[1] * qm[1] + dl[2] * qm[2] + dl[3] * qm[3] +
|
|
dl[4] * qm[4] + dl[5] * qm[5] + dl[6] * qm[6] + dl[7] * qm[7];
|
|
|
|
dx[0] = dx[1]; dx[1] = dx[2]; dx[2] = dx[3]; dx[3] = dx[4];
|
|
dl[0] = dl[1]; dl[1] = dl[2]; dl[2] = dl[3]; dl[3] = dl[4];
|
|
|
|
dx[4] = ((dl[4] >> 30) | 1);
|
|
dx[5] = ((dl[5] >> 30) | 2) & ~1;
|
|
dx[6] = ((dl[6] >> 30) | 2) & ~1;
|
|
dx[7] = ((dl[7] >> 30) | 4) & ~3;
|
|
|
|
c->error = *in;
|
|
*in += (sum >> c->shift);
|
|
|
|
dl[4] = -dl[5]; dl[5] = -dl[6];
|
|
dl[6] = *in - dl[7]; dl[7] = *in;
|
|
dl[5] += dl[6]; dl[4] += dl[5];
|
|
}
|
|
|
|
static void rice_init(TTARice *c, uint32_t k0, uint32_t k1)
|
|
{
|
|
c->k0 = k0;
|
|
c->k1 = k1;
|
|
c->sum0 = shift_16[k0];
|
|
c->sum1 = shift_16[k1];
|
|
}
|
|
|
|
static int tta_get_unary(GetBitContext *gb)
|
|
{
|
|
int ret = 0;
|
|
|
|
// count ones
|
|
while (get_bits_left(gb) > 0 && get_bits1(gb))
|
|
ret++;
|
|
return ret;
|
|
}
|
|
|
|
static const int64_t tta_channel_layouts[7] = {
|
|
AV_CH_LAYOUT_STEREO,
|
|
AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY,
|
|
AV_CH_LAYOUT_QUAD,
|
|
0,
|
|
AV_CH_LAYOUT_5POINT1_BACK,
|
|
AV_CH_LAYOUT_5POINT1_BACK|AV_CH_BACK_CENTER,
|
|
AV_CH_LAYOUT_7POINT1_WIDE
|
|
};
|
|
|
|
static int tta_check_crc(TTAContext *s, const uint8_t *buf, int buf_size)
|
|
{
|
|
uint32_t crc, CRC;
|
|
|
|
CRC = AV_RL32(buf + buf_size);
|
|
crc = av_crc(s->crc_table, 0xFFFFFFFFU, buf, buf_size);
|
|
if (CRC != (crc ^ 0xFFFFFFFFU)) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "CRC error\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int tta_decode_init(AVCodecContext * avctx)
|
|
{
|
|
TTAContext *s = avctx->priv_data;
|
|
|
|
s->avctx = avctx;
|
|
|
|
// 30bytes includes a seektable with one frame
|
|
if (avctx->extradata_size < 30)
|
|
return -1;
|
|
|
|
init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size * 8);
|
|
if (show_bits_long(&s->gb, 32) == AV_RL32("TTA1"))
|
|
{
|
|
if (avctx->err_recognition & AV_EF_CRCCHECK) {
|
|
s->crc_table = av_crc_get_table(AV_CRC_32_IEEE_LE);
|
|
tta_check_crc(s, avctx->extradata, 18);
|
|
}
|
|
|
|
/* signature */
|
|
skip_bits_long(&s->gb, 32);
|
|
|
|
s->format = get_bits(&s->gb, 16);
|
|
if (s->format > 2) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "Invalid format\n");
|
|
return -1;
|
|
}
|
|
if (s->format == FORMAT_ENCRYPTED) {
|
|
av_log_missing_feature(s->avctx, "Encrypted TTA", 0);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
avctx->channels = s->channels = get_bits(&s->gb, 16);
|
|
if (s->channels > 1 && s->channels < 9)
|
|
avctx->channel_layout = tta_channel_layouts[s->channels-2];
|
|
avctx->bits_per_coded_sample = get_bits(&s->gb, 16);
|
|
s->bps = (avctx->bits_per_coded_sample + 7) / 8;
|
|
avctx->sample_rate = get_bits_long(&s->gb, 32);
|
|
s->data_length = get_bits_long(&s->gb, 32);
|
|
skip_bits_long(&s->gb, 32); // CRC32 of header
|
|
|
|
if (s->channels == 0) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
|
|
return AVERROR_INVALIDDATA;
|
|
} else if (avctx->sample_rate == 0) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
switch(s->bps) {
|
|
case 1: avctx->sample_fmt = AV_SAMPLE_FMT_U8; break;
|
|
case 2:
|
|
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
|
|
avctx->bits_per_raw_sample = 16;
|
|
break;
|
|
case 3:
|
|
avctx->sample_fmt = AV_SAMPLE_FMT_S32;
|
|
avctx->bits_per_raw_sample = 24;
|
|
break;
|
|
//case 4: avctx->sample_fmt = AV_SAMPLE_FMT_S32; break;
|
|
default:
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported sample format.\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
// prevent overflow
|
|
if (avctx->sample_rate > 0x7FFFFF) {
|
|
av_log(avctx, AV_LOG_ERROR, "sample_rate too large\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
s->frame_length = 256 * avctx->sample_rate / 245;
|
|
|
|
s->last_frame_length = s->data_length % s->frame_length;
|
|
s->total_frames = s->data_length / s->frame_length +
|
|
(s->last_frame_length ? 1 : 0);
|
|
|
|
av_log(s->avctx, AV_LOG_DEBUG, "format: %d chans: %d bps: %d rate: %d block: %d\n",
|
|
s->format, avctx->channels, avctx->bits_per_coded_sample, avctx->sample_rate,
|
|
avctx->block_align);
|
|
av_log(s->avctx, AV_LOG_DEBUG, "data_length: %d frame_length: %d last: %d total: %d\n",
|
|
s->data_length, s->frame_length, s->last_frame_length, s->total_frames);
|
|
|
|
if (s->total_frames < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
// FIXME: seek table
|
|
if (get_bits_left(&s->gb) < 32 * s->total_frames + 32)
|
|
av_log(avctx, AV_LOG_WARNING, "Seek table missing or too small\n");
|
|
else if (avctx->err_recognition & AV_EF_CRCCHECK) {
|
|
if (avctx->extradata_size < 26 + s->total_frames * 4 || tta_check_crc(s, avctx->extradata + 22, s->total_frames * 4))
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
skip_bits_long(&s->gb, 32 * s->total_frames);
|
|
skip_bits_long(&s->gb, 32); // CRC32 of seektable
|
|
|
|
if(s->frame_length >= UINT_MAX / (s->channels * sizeof(int32_t))){
|
|
av_log(avctx, AV_LOG_ERROR, "frame_length too large\n");
|
|
return -1;
|
|
}
|
|
|
|
if (s->bps < 3) {
|
|
s->decode_buffer = av_mallocz(sizeof(int32_t)*s->frame_length*s->channels);
|
|
if (!s->decode_buffer)
|
|
return AVERROR(ENOMEM);
|
|
} else
|
|
s->decode_buffer = NULL;
|
|
s->ch_ctx = av_malloc(avctx->channels * sizeof(*s->ch_ctx));
|
|
if (!s->ch_ctx) {
|
|
av_freep(&s->decode_buffer);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
} else {
|
|
av_log(avctx, AV_LOG_ERROR, "Wrong extradata present\n");
|
|
return -1;
|
|
}
|
|
|
|
avcodec_get_frame_defaults(&s->frame);
|
|
avctx->coded_frame = &s->frame;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tta_decode_frame(AVCodecContext *avctx, void *data,
|
|
int *got_frame_ptr, AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
TTAContext *s = avctx->priv_data;
|
|
int i, ret;
|
|
int cur_chan = 0, framelen = s->frame_length;
|
|
int32_t *p;
|
|
|
|
if (avctx->err_recognition & AV_EF_CRCCHECK) {
|
|
if (buf_size < 4 || tta_check_crc(s, buf, buf_size - 4))
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
init_get_bits(&s->gb, buf, buf_size*8);
|
|
|
|
// FIXME: seeking
|
|
s->total_frames--;
|
|
if (!s->total_frames && s->last_frame_length)
|
|
framelen = s->last_frame_length;
|
|
|
|
/* get output buffer */
|
|
s->frame.nb_samples = framelen;
|
|
if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
return ret;
|
|
}
|
|
|
|
// decode directly to output buffer for 24-bit sample format
|
|
if (s->bps == 3)
|
|
s->decode_buffer = (int32_t *)s->frame.data[0];
|
|
|
|
// init per channel states
|
|
for (i = 0; i < s->channels; i++) {
|
|
s->ch_ctx[i].predictor = 0;
|
|
ttafilter_init(&s->ch_ctx[i].filter, ttafilter_configs[s->bps-1]);
|
|
rice_init(&s->ch_ctx[i].rice, 10, 10);
|
|
}
|
|
|
|
for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++) {
|
|
int32_t *predictor = &s->ch_ctx[cur_chan].predictor;
|
|
TTAFilter *filter = &s->ch_ctx[cur_chan].filter;
|
|
TTARice *rice = &s->ch_ctx[cur_chan].rice;
|
|
uint32_t unary, depth, k;
|
|
int32_t value;
|
|
|
|
unary = tta_get_unary(&s->gb);
|
|
|
|
if (unary == 0) {
|
|
depth = 0;
|
|
k = rice->k0;
|
|
} else {
|
|
depth = 1;
|
|
k = rice->k1;
|
|
unary--;
|
|
}
|
|
|
|
if (get_bits_left(&s->gb) < k) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto error;
|
|
}
|
|
|
|
if (k) {
|
|
if (k > MIN_CACHE_BITS) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto error;
|
|
}
|
|
value = (unary << k) + get_bits(&s->gb, k);
|
|
} else
|
|
value = unary;
|
|
|
|
// FIXME: copy paste from original
|
|
switch (depth) {
|
|
case 1:
|
|
rice->sum1 += value - (rice->sum1 >> 4);
|
|
if (rice->k1 > 0 && rice->sum1 < shift_16[rice->k1])
|
|
rice->k1--;
|
|
else if(rice->sum1 > shift_16[rice->k1 + 1])
|
|
rice->k1++;
|
|
value += shift_1[rice->k0];
|
|
default:
|
|
rice->sum0 += value - (rice->sum0 >> 4);
|
|
if (rice->k0 > 0 && rice->sum0 < shift_16[rice->k0])
|
|
rice->k0--;
|
|
else if(rice->sum0 > shift_16[rice->k0 + 1])
|
|
rice->k0++;
|
|
}
|
|
|
|
// extract coded value
|
|
*p = 1 + ((value >> 1) ^ ((value & 1) - 1));
|
|
|
|
// run hybrid filter
|
|
ttafilter_process(filter, p);
|
|
|
|
// fixed order prediction
|
|
#define PRED(x, k) (int32_t)((((uint64_t)x << k) - x) >> k)
|
|
switch (s->bps) {
|
|
case 1: *p += PRED(*predictor, 4); break;
|
|
case 2:
|
|
case 3: *p += PRED(*predictor, 5); break;
|
|
case 4: *p += *predictor; break;
|
|
}
|
|
*predictor = *p;
|
|
|
|
// flip channels
|
|
if (cur_chan < (s->channels-1))
|
|
cur_chan++;
|
|
else {
|
|
// decorrelate in case of stereo integer
|
|
if (s->channels > 1) {
|
|
int32_t *r = p - 1;
|
|
for (*p += *r / 2; r > p - s->channels; r--)
|
|
*r = *(r + 1) - *r;
|
|
}
|
|
cur_chan = 0;
|
|
}
|
|
}
|
|
|
|
if (get_bits_left(&s->gb) < 32) {
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto error;
|
|
}
|
|
skip_bits_long(&s->gb, 32); // frame crc
|
|
|
|
// convert to output buffer
|
|
switch (s->bps) {
|
|
case 1: {
|
|
uint8_t *samples = (uint8_t *)s->frame.data[0];
|
|
for (p = s->decode_buffer; p < s->decode_buffer + (framelen * s->channels); p++)
|
|
*samples++ = *p + 0x80;
|
|
break;
|
|
}
|
|
case 2: {
|
|
uint16_t *samples = (int16_t *)s->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 *)s->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;
|
|
*(AVFrame *)data = s->frame;
|
|
|
|
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;
|
|
}
|
|
|
|
AVCodec ff_tta_decoder = {
|
|
.name = "tta",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.id = 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("True Audio (TTA)"),
|
|
};
|