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-rw-r--r--libavcodec/tta.c363
1 files changed, 156 insertions, 207 deletions
diff --git a/libavcodec/tta.c b/libavcodec/tta.c
index 4d2e2a00be..19cdd8c7b2 100644
--- a/libavcodec/tta.c
+++ b/libavcodec/tta.c
@@ -2,20 +2,20 @@
* TTA (The Lossless True Audio) decoder
* Copyright (c) 2006 Alex Beregszaszi
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -29,35 +29,23 @@
#define BITSTREAM_READER_LE
#include <limits.h>
+#include "ttadata.h"
+#include "ttadsp.h"
#include "avcodec.h"
#include "get_bits.h"
+#include "thread.h"
+#include "unary.h"
#include "internal.h"
#include "libavutil/crc.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/opt.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 {
+ AVClass *class;
AVCodecContext *avctx;
- GetBitContext gb;
const AVCRC *crc_table;
int format, channels, bps;
@@ -66,128 +54,65 @@ typedef struct TTAContext {
int32_t *decode_buffer;
+ uint8_t crc_pass[8];
+ uint8_t *pass;
TTAChannel *ch_ctx;
+ TTADSPContext dsp;
} 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 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 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);
-}
-
-// FIXME: copy paste from original
-static inline void memshl(register int32_t *a, register int32_t *b) {
- *a++ = *b++;
- *a++ = *b++;
- *a++ = *b++;
- *a++ = *b++;
- *a++ = *b++;
- *a++ = *b++;
- *a++ = *b++;
- *a = *b;
-}
-
-static inline void ttafilter_process(TTAFilter *c, int32_t *in)
+static int tta_check_crc(TTAContext *s, const uint8_t *buf, int buf_size)
{
- register int32_t *dl = c->dl, *qm = c->qm, *dx = c->dx, sum = c->round;
-
- if (!c->error) {
- sum += *dl++ * *qm, qm++;
- sum += *dl++ * *qm, qm++;
- sum += *dl++ * *qm, qm++;
- sum += *dl++ * *qm, qm++;
- sum += *dl++ * *qm, qm++;
- sum += *dl++ * *qm, qm++;
- sum += *dl++ * *qm, qm++;
- sum += *dl++ * *qm, qm++;
- dx += 8;
- } else if(c->error < 0) {
- sum += *dl++ * (*qm -= *dx++), qm++;
- sum += *dl++ * (*qm -= *dx++), qm++;
- sum += *dl++ * (*qm -= *dx++), qm++;
- sum += *dl++ * (*qm -= *dx++), qm++;
- sum += *dl++ * (*qm -= *dx++), qm++;
- sum += *dl++ * (*qm -= *dx++), qm++;
- sum += *dl++ * (*qm -= *dx++), qm++;
- sum += *dl++ * (*qm -= *dx++), qm++;
- } else {
- sum += *dl++ * (*qm += *dx++), qm++;
- sum += *dl++ * (*qm += *dx++), qm++;
- sum += *dl++ * (*qm += *dx++), qm++;
- sum += *dl++ * (*qm += *dx++), qm++;
- sum += *dl++ * (*qm += *dx++), qm++;
- sum += *dl++ * (*qm += *dx++), qm++;
- sum += *dl++ * (*qm += *dx++), qm++;
- sum += *dl++ * (*qm += *dx++), qm++;
- }
-
- *(dx-0) = ((*(dl-1) >> 30) | 1) << 2;
- *(dx-1) = ((*(dl-2) >> 30) | 1) << 1;
- *(dx-2) = ((*(dl-3) >> 30) | 1) << 1;
- *(dx-3) = ((*(dl-4) >> 30) | 1);
-
- c->error = *in;
- *in += (sum >> c->shift);
- *dl = *in;
-
- *(dl-1) = *dl - *(dl-1);
- *(dl-2) = *(dl-1) - *(dl-2);
- *(dl-3) = *(dl-2) - *(dl-3);
+ uint32_t crc, CRC;
- memshl(c->dl, c->dl + 1);
- memshl(c->dx, c->dx + 1);
-}
+ 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;
+ }
-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];
+ return 0;
}
-static int tta_get_unary(GetBitContext *gb)
+static uint64_t tta_check_crc64(uint8_t *pass)
{
- int ret = 0;
+ uint64_t crc = UINT64_MAX, poly = 0x42F0E1EBA9EA3693U;
+ uint8_t *end = pass + strlen(pass);
+ int i;
+
+ while (pass < end) {
+ crc ^= (uint64_t)*pass++ << 56;
+ for (i = 0; i < 8; i++)
+ crc = (crc << 1) ^ (poly & (((int64_t) crc) >> 63));
+ }
- // count ones
- while (get_bits_left(gb) > 0 && get_bits1(gb))
- ret++;
- return ret;
+ return crc ^ UINT64_MAX;
}
-static int tta_check_crc(TTAContext *s, const uint8_t *buf, int buf_size)
+static int allocate_buffers(AVCodecContext *avctx)
{
- uint32_t crc, CRC;
+ TTAContext *s = avctx->priv_data;
- 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;
+ 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);
}
return 0;
@@ -196,58 +121,59 @@ static int tta_check_crc(TTAContext *s, const uint8_t *buf, int buf_size)
static av_cold int tta_decode_init(AVCodecContext * avctx)
{
TTAContext *s = avctx->priv_data;
+ GetBitContext gb;
int total_frames;
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);
- }
+ // 30bytes includes TTA1 header
+ if (avctx->extradata_size < 22)
+ return AVERROR_INVALIDDATA;
+ s->crc_table = av_crc_get_table(AV_CRC_32_IEEE_LE);
+ init_get_bits8(&gb, avctx->extradata, avctx->extradata_size);
+ if (show_bits_long(&gb, 32) == AV_RL32("TTA1")) {
/* signature */
- skip_bits_long(&s->gb, 32);
+ skip_bits_long(&gb, 32);
- s->format = get_bits(&s->gb, 16);
+ s->format = get_bits(&gb, 16);
if (s->format > 2) {
- av_log(s->avctx, AV_LOG_ERROR, "Invalid format\n");
- return -1;
+ av_log(avctx, AV_LOG_ERROR, "Invalid format\n");
+ return AVERROR_INVALIDDATA;
}
if (s->format == FORMAT_ENCRYPTED) {
- avpriv_report_missing_feature(s->avctx, "Encrypted TTA");
- return AVERROR_PATCHWELCOME;
+ if (!s->pass) {
+ av_log(avctx, AV_LOG_ERROR, "Missing password for encrypted stream. Please use the -password option\n");
+ return AVERROR(EINVAL);
+ }
+ AV_WL64(s->crc_pass, tta_check_crc64(s->pass));
}
- avctx->channels = s->channels = get_bits(&s->gb, 16);
- 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
+ avctx->channels = s->channels = get_bits(&gb, 16);
+ if (s->channels > 1 && s->channels < 9)
+ avctx->channel_layout = tta_channel_layouts[s->channels-2];
+ avctx->bits_per_raw_sample = get_bits(&gb, 16);
+ s->bps = (avctx->bits_per_raw_sample + 7) / 8;
+ avctx->sample_rate = get_bits_long(&gb, 32);
+ s->data_length = get_bits_long(&gb, 32);
+ skip_bits_long(&gb, 32); // CRC32 of header
if (s->channels == 0) {
- av_log(s->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
+ av_log(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");
+ av_log(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;
@@ -264,54 +190,35 @@ static av_cold int tta_decode_init(AVCodecContext * avctx)
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",
+ av_log(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",
+ av_log(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, total_frames);
- // FIXME: seek table
- if (avctx->extradata_size <= 26 || total_frames > INT_MAX / 4 ||
- avctx->extradata_size - 26 < total_frames * 4)
- av_log(avctx, AV_LOG_WARNING, "Seek table missing or too small\n");
- else if (avctx->err_recognition & AV_EF_CRCCHECK) {
- int ret = tta_check_crc(s, avctx->extradata + 22, total_frames * 4);
- if (ret < 0 && avctx->err_recognition & AV_EF_EXPLODE)
- return AVERROR_INVALIDDATA;
- }
- skip_bits_long(&s->gb, 32 * 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 == 2) {
- s->decode_buffer = av_mallocz(sizeof(int32_t)*s->frame_length*s->channels);
- if (!s->decode_buffer)
- return AVERROR(ENOMEM);
- }
- s->ch_ctx = av_malloc(avctx->channels * sizeof(*s->ch_ctx));
- if (!s->ch_ctx) {
- av_freep(&s->decode_buffer);
- return AVERROR(ENOMEM);
+ return AVERROR_INVALIDDATA;
}
} else {
av_log(avctx, AV_LOG_ERROR, "Wrong extradata present\n");
- return -1;
+ return AVERROR_INVALIDDATA;
}
- return 0;
+ ff_ttadsp_init(&s->dsp);
+
+ return allocate_buffers(avctx);
}
static int tta_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame_ptr, AVPacket *avpkt)
{
AVFrame *frame = data;
+ ThreadFrame tframe = { .f = data };
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
TTAContext *s = avctx->priv_data;
+ GetBitContext gb;
int i, ret;
int cur_chan = 0, framelen = s->frame_length;
int32_t *p;
@@ -322,14 +229,13 @@ static int tta_decode_frame(AVCodecContext *avctx, void *data,
return AVERROR_INVALIDDATA;
}
- init_get_bits(&s->gb, buf, buf_size*8);
+ if ((ret = init_get_bits8(&gb, avpkt->data, avpkt->size)) < 0)
+ return ret;
/* get output buffer */
frame->nb_samples = framelen;
- if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ if ((ret = ff_thread_get_buffer(avctx, &tframe, 0)) < 0)
return ret;
- }
// decode directly to output buffer for 24-bit sample format
if (s->bps == 3)
@@ -337,9 +243,15 @@ static int tta_decode_frame(AVCodecContext *avctx, void *data,
// init per channel states
for (i = 0; i < s->channels; i++) {
+ TTAFilter *filter = &s->ch_ctx[i].filter;
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);
+ ff_tta_filter_init(filter, ff_tta_filter_configs[s->bps-1]);
+ if (s->format == FORMAT_ENCRYPTED) {
+ int i;
+ for (i = 0; i < 8; i++)
+ filter->qm[i] = sign_extend(s->crc_pass[i], 8);
+ }
+ ff_tta_rice_init(&s->ch_ctx[i].rice, 10, 10);
}
i = 0;
@@ -350,7 +262,7 @@ static int tta_decode_frame(AVCodecContext *avctx, void *data,
uint32_t unary, depth, k;
int32_t value;
- unary = tta_get_unary(&s->gb);
+ unary = get_unary(&gb, 0, get_bits_left(&gb));
if (unary == 0) {
depth = 0;
@@ -361,7 +273,7 @@ static int tta_decode_frame(AVCodecContext *avctx, void *data,
unary--;
}
- if (get_bits_left(&s->gb) < k) {
+ if (get_bits_left(&gb) < k) {
ret = AVERROR_INVALIDDATA;
goto error;
}
@@ -371,7 +283,7 @@ static int tta_decode_frame(AVCodecContext *avctx, void *data,
ret = AVERROR_INVALIDDATA;
goto error;
}
- value = (unary << k) + get_bits(&s->gb, k);
+ value = (unary << k) + get_bits(&gb, k);
} else
value = unary;
@@ -379,16 +291,16 @@ static int tta_decode_frame(AVCodecContext *avctx, void *data,
switch (depth) {
case 1:
rice->sum1 += value - (rice->sum1 >> 4);
- if (rice->k1 > 0 && rice->sum1 < shift_16[rice->k1])
+ if (rice->k1 > 0 && rice->sum1 < ff_tta_shift_16[rice->k1])
rice->k1--;
- else if(rice->sum1 > shift_16[rice->k1 + 1])
+ else if(rice->sum1 > ff_tta_shift_16[rice->k1 + 1])
rice->k1++;
- value += shift_1[rice->k0];
+ value += ff_tta_shift_1[rice->k0];
default:
rice->sum0 += value - (rice->sum0 >> 4);
- if (rice->k0 > 0 && rice->sum0 < shift_16[rice->k0])
+ if (rice->k0 > 0 && rice->sum0 < ff_tta_shift_16[rice->k0])
rice->k0--;
- else if(rice->sum0 > shift_16[rice->k0 + 1])
+ else if(rice->sum0 > ff_tta_shift_16[rice->k0 + 1])
rice->k0++;
}
@@ -396,7 +308,8 @@ static int tta_decode_frame(AVCodecContext *avctx, void *data,
*p = 1 + ((value >> 1) ^ ((value & 1) - 1));
// run hybrid filter
- ttafilter_process(filter, p);
+ s->dsp.ttafilter_process_dec(filter->qm, filter->dx, filter->dl, &filter->error, p,
+ filter->shift, filter->round);
// fixed order prediction
#define PRED(x, k) (int32_t)((((uint64_t)x << k) - x) >> k)
@@ -421,32 +334,43 @@ static int tta_decode_frame(AVCodecContext *avctx, void *data,
cur_chan = 0;
i++;
// check for last frame
- if (i == s->last_frame_length && get_bits_left(&s->gb) / 8 == 4) {
+ if (i == s->last_frame_length && get_bits_left(&gb) / 8 == 4) {
frame->nb_samples = framelen = s->last_frame_length;
break;
}
}
}
- align_get_bits(&s->gb);
- if (get_bits_left(&s->gb) < 32) {
+ align_get_bits(&gb);
+ if (get_bits_left(&gb) < 32) {
ret = AVERROR_INVALIDDATA;
goto error;
}
- skip_bits_long(&s->gb, 32); // frame crc
+ skip_bits_long(&gb, 32); // frame crc
// convert to output buffer
- if (s->bps == 2) {
+ 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;
- } else {
+ break;
+ }
+ case 3: {
// shift samples for 24-bit sample format
int32_t *samples = (int32_t *)frame->data[0];
for (i = 0; i < framelen * s->channels; i++)
*samples++ <<= 8;
// reset decode buffer
s->decode_buffer = NULL;
+ break;
+ }
}
*got_frame_ptr = 1;
@@ -459,15 +383,38 @@ error:
return ret;
}
+static int init_thread_copy(AVCodecContext *avctx)
+{
+ TTAContext *s = avctx->priv_data;
+ s->avctx = avctx;
+ return allocate_buffers(avctx);
+}
+
static av_cold int tta_decode_close(AVCodecContext *avctx) {
TTAContext *s = avctx->priv_data;
- av_free(s->decode_buffer);
+ 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",
.long_name = NULL_IF_CONFIG_SMALL("TTA (True Audio)"),
@@ -477,5 +424,7 @@ AVCodec ff_tta_decoder = {
.init = tta_decode_init,
.close = tta_decode_close,
.decode = tta_decode_frame,
- .capabilities = CODEC_CAP_DR1,
+ .init_thread_copy = ONLY_IF_THREADS_ENABLED(init_thread_copy),
+ .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
+ .priv_class = &tta_decoder_class,
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 14:10:09 +0000