[FFmpeg-cvslog] tta: fix reading of format in TTA header.
Justin Ruggles
git at videolan.org
Wed Oct 26 02:46:27 CEST 2011
ffmpeg | branch: master | Justin Ruggles <justin.ruggles at gmail.com> | Thu Sep 22 12:54:28 2011 -0400| [b16960a8a5373de74027751a72f3b4f3e9c7fb77] | committer: Justin Ruggles
tta: fix reading of format in TTA header.
TTA does not support float at all, and format 2 is encrypted TTA.
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b16960a8a5373de74027751a72f3b4f3e9c7fb77
---
libavcodec/tta.c | 32 ++++++++++++++------------------
1 files changed, 14 insertions(+), 18 deletions(-)
diff --git a/libavcodec/tta.c b/libavcodec/tta.c
index 6eea6a0..74d0d46 100644
--- a/libavcodec/tta.c
+++ b/libavcodec/tta.c
@@ -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;
More information about the ffmpeg-cvslog
mailing list