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tta: fix reading of format in TTA header. 

TTA does not support float at all, and format 2 is encrypted TTA.
This commit is contained in:
Justin Ruggles 2011-09-22 12:54:28 -04:00
parent 4d3e7a7516
commit b16960a8a5
1 changed files with 14 additions and 18 deletions
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32
libavcodec/tta.c
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@ -33,8 +33,8 @@
#include "avcodec.h"
#include "get_bits.h"
#define FORMAT_INT 1
#define FORMAT_FLOAT 3
#define FORMAT_SIMPLE 1
#define FORMAT_ENCRYPTED 2
#define MAX_ORDER 16
typedef struct TTAFilter {
@ -58,7 +58,7 @@ typedef struct TTAContext {
AVCodecContext *avctx;
GetBitContext gb;
int flags, channels, bps, is_float, data_length;
int format, channels, bps, data_length;
int frame_length, last_frame_length, total_frames;
int32_t *decode_buffer;
@ -204,13 +204,15 @@ static av_cold int tta_decode_init(AVCodecContext * avctx)
/* signature */
skip_bits(&s->gb, 32);
s->flags = get_bits(&s->gb, 16);
if (s->flags != 1 && s->flags != 3)
{
av_log(s->avctx, AV_LOG_ERROR, "Invalid flags\n");
s->format = get_bits(&s->gb, 16);
if (s->format > 2) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid format\n");
return -1;
}
s->is_float = (s->flags == FORMAT_FLOAT);
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);
avctx->bits_per_coded_sample = get_bits(&s->gb, 16);
s->bps = (avctx->bits_per_coded_sample + 7) / 8;
@ -222,13 +224,7 @@ static av_cold int tta_decode_init(AVCodecContext * avctx)
s->data_length = get_bits_long(&s->gb, 32);
skip_bits(&s->gb, 32); // CRC32 of header
if (s->is_float)
{
avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
av_log_ask_for_sample(s->avctx, "Unsupported sample format.\n");
return -1;
}
else switch(s->bps) {
switch(s->bps) {
// case 1: avctx->sample_fmt = AV_SAMPLE_FMT_U8; break;
case 2: avctx->sample_fmt = AV_SAMPLE_FMT_S16; break;
// case 3: avctx->sample_fmt = AV_SAMPLE_FMT_S24; break;
@ -247,8 +243,8 @@ static av_cold int tta_decode_init(AVCodecContext * avctx)
s->total_frames = s->data_length / s->frame_length +
(s->last_frame_length ? 1 : 0);
av_log(s->avctx, AV_LOG_DEBUG, "flags: %x chans: %d bps: %d rate: %d block: %d\n",
s->flags, avctx->channels, avctx->bits_per_coded_sample, avctx->sample_rate,
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);
@ -372,7 +368,7 @@ static int tta_decode_frame(AVCodecContext *avctx,
cur_chan++;
else {
// decorrelate in case of stereo integer
if (!s->is_float && (s->channels > 1)) {
if (s->channels > 1) {
int32_t *r = p - 1;
for (*p += *r / 2; r > p - s->channels; r--)
*r = *(r + 1) - *r;