virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

wmapro: change max. block size to 13 bits.

Browse Source 
WMApro actually support 13-bits block sizes (potentially even up to 14),
and thus we should support that also. If we get block sizes beyond what
the decoder can handle (14 is possible depending on s->decode_flags),
error out instead of crashing.
This commit is contained in:
Ronald S. Bultje 2012-02-16 13:51:17 -08:00
parent 204cb29b3c
commit b4027d9749
4 changed files with 13 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
libavcodec/sinewin.h
View File

@ -53,7 +53,8 @@ extern SINETABLE( 512);
extern SINETABLE(1024);
extern SINETABLE(2048);
extern SINETABLE(4096);
extern SINETABLE(8192);
extern SINETABLE_CONST float * const ff_sine_windows[13];
extern SINETABLE_CONST float * const ff_sine_windows[14];
#endif /* AVCODEC_SINEWIN_H */

2
libavcodec/sinewin_tablegen.c
View File

@ -38,7 +38,7 @@ int main(void)
write_fileheader();
for (i = 5; i <= 12; i++) {
for (i = 5; i <= 13; i++) {
ff_init_ff_sine_windows(i);
printf("SINETABLE(%4i) = {\n", 1 << i);
write_float_array(ff_sine_windows[i], 1 << i);

3
libavcodec/sinewin_tablegen.h
View File

@ -38,6 +38,7 @@ SINETABLE( 512);
SINETABLE(1024);
SINETABLE(2048);
SINETABLE(4096);
SINETABLE(8192);
#else
#include "libavcodec/sinewin_tables.h"
#endif
@ -45,7 +46,7 @@ SINETABLE(4096);
SINETABLE_CONST float * const ff_sine_windows[] = {
NULL, NULL, NULL, NULL, NULL, // unused
ff_sine_32 , ff_sine_64 ,
ff_sine_128, ff_sine_256, ff_sine_512, ff_sine_1024, ff_sine_2048, ff_sine_4096
ff_sine_128, ff_sine_256, ff_sine_512, ff_sine_1024, ff_sine_2048, ff_sine_4096, ff_sine_8192
};
// Generate a sine window.

12
libavcodec/wmaprodec.c
View File

@ -105,7 +105,7 @@
#define MAX_FRAMESIZE 32768 ///< maximum compressed frame size
#define WMAPRO_BLOCK_MIN_BITS 6 ///< log2 of min block size
#define WMAPRO_BLOCK_MAX_BITS 12 ///< log2 of max block size
#define WMAPRO_BLOCK_MAX_BITS 13 ///< log2 of max block size
#define WMAPRO_BLOCK_MAX_SIZE (1 << WMAPRO_BLOCK_MAX_BITS) ///< maximum block size
#define WMAPRO_BLOCK_SIZES (WMAPRO_BLOCK_MAX_BITS - WMAPRO_BLOCK_MIN_BITS + 1) ///< possible block sizes
@ -276,7 +276,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
WMAProDecodeCtx *s = avctx->priv_data;
uint8_t *edata_ptr = avctx->extradata;
unsigned int channel_mask;
int i;
int i, bits;
int log2_max_num_subframes;
int num_possible_block_sizes;
@ -310,8 +310,12 @@ static av_cold int decode_init(AVCodecContext *avctx)
s->len_prefix = (s->decode_flags & 0x40);
/** get frame len */
s->samples_per_frame = 1 << ff_wma_get_frame_len_bits(avctx->sample_rate,
3, s->decode_flags);
bits = ff_wma_get_frame_len_bits(avctx->sample_rate, 3, s->decode_flags);
if (bits > WMAPRO_BLOCK_MAX_BITS) {
av_log_missing_feature(avctx, "14-bits block sizes", 1);
return AVERROR_INVALIDDATA;
}
s->samples_per_frame = 1 << bits;
/** subframe info */
log2_max_num_subframes = ((s->decode_flags & 0x38) >> 3);