#include <limits.h>
#define ALT_BITSTREAM_READER
+#include "libavutil/crc.h"
#include "avcodec.h"
#include "bitstream.h"
#include "golomb.h"
-#include "crc.h"
#include "flac.h"
#undef NDEBUG
int32_t *decoded[MAX_CHANNELS];
uint8_t *bitstream;
- int bitstream_size;
- int bitstream_index;
+ unsigned int bitstream_size;
+ unsigned int bitstream_index;
unsigned int allocated_bitstream_size;
} FLACContext;
#define METADATA_TYPE_STREAMINFO 0
-static int sample_rate_table[] =
-{ 0, 0, 0, 0,
+static const int sample_rate_table[] =
+{ 0,
+ 88200, 176400, 192000,
8000, 16000, 22050, 24000, 32000, 44100, 48000, 96000,
0, 0, 0, 0 };
-static int sample_size_table[] =
+static const int sample_size_table[] =
{ 0, 8, 12, 0, 16, 20, 24, 0 };
-static int blocksize_table[] = {
+static const int blocksize_table[] = {
0, 192, 576<<0, 576<<1, 576<<2, 576<<3, 0, 0,
256<<0, 256<<1, 256<<2, 256<<3, 256<<4, 256<<5, 256<<6, 256<<7
};
}
}
+ avctx->sample_fmt = SAMPLE_FMT_S16;
return 0;
}
s->decoded[i] = av_realloc(s->decoded[i], sizeof(int32_t)*s->max_blocksize);
}
- s->bitstream= av_fast_realloc(s->bitstream, &s->allocated_bitstream_size, s->max_framesize);
+ if(s->allocated_bitstream_size < s->max_framesize)
+ s->bitstream= av_fast_realloc(s->bitstream, &s->allocated_bitstream_size, s->max_framesize);
}
void ff_flac_parse_streaminfo(AVCodecContext *avctx, struct FLACStreaminfo *s,
static int metadata_parse(FLACContext *s)
{
int i, metadata_last, metadata_type, metadata_size, streaminfo_updated=0;
+ int initial_pos= get_bits_count(&s->gb);
if (show_bits_long(&s->gb, 32) == MKBETAG('f','L','a','C')) {
skip_bits(&s->gb, 32);
metadata_type = get_bits(&s->gb, 7);
metadata_size = get_bits_long(&s->gb, 24);
+ if(get_bits_count(&s->gb) + 8*metadata_size > s->gb.size_in_bits){
+ skip_bits_long(&s->gb, initial_pos - get_bits_count(&s->gb));
+ break;
+ }
+
av_log(s->avctx, AV_LOG_DEBUG,
" metadata block: flag = %d, type = %d, size = %d\n",
metadata_last, metadata_type, metadata_size);
return -1;
if(pred_order > 0)
- a = decoded[pred_order-1];
+ a = decoded[pred_order-1];
if(pred_order > 1)
- b = a - decoded[pred_order-2];
+ b = a - decoded[pred_order-2];
if(pred_order > 2)
- c = b - decoded[pred_order-2] + decoded[pred_order-3];
+ c = b - decoded[pred_order-2] + decoded[pred_order-3];
if(pred_order > 3)
- d = c - decoded[pred_order-2] + 2*decoded[pred_order-3] - decoded[pred_order-4];
+ d = c - decoded[pred_order-2] + 2*decoded[pred_order-3] - decoded[pred_order-4];
switch(pred_order)
{
if (sample_rate_code == 0){
samplerate= s->samplerate;
- }else if ((sample_rate_code > 3) && (sample_rate_code < 12))
+ }else if (sample_rate_code < 12)
samplerate = sample_rate_table[sample_rate_code];
else if (sample_rate_code == 12)
samplerate = get_bits(&s->gb, 8) * 1000;
*data_size=0;
if(s->max_framesize == 0){
- s->max_framesize= 65536; // should hopefully be enough for the first header
+ s->max_framesize= FFMAX(4, buf_size); // should hopefully be enough for the first header
s->bitstream= av_fast_realloc(s->bitstream, &s->allocated_bitstream_size, s->max_framesize);
}
if(1 && s->max_framesize){//FIXME truncated
- buf_size= FFMAX(FFMIN(buf_size, s->max_framesize - s->bitstream_size), 0);
+ if(s->bitstream_size < 4 || AV_RL32(s->bitstream) != MKTAG('f','L','a','C'))
+ buf_size= FFMIN(buf_size, s->max_framesize - FFMIN(s->bitstream_size, s->max_framesize));
input_buf_size= buf_size;
+ if(s->bitstream_size + buf_size < buf_size || s->bitstream_index + s->bitstream_size + buf_size < s->bitstream_index)
+ return -1;
+
+ if(s->allocated_bitstream_size < s->bitstream_size + buf_size)
+ s->bitstream= av_fast_realloc(s->bitstream, &s->allocated_bitstream_size, s->bitstream_size + buf_size);
+
if(s->bitstream_index + s->bitstream_size + buf_size > s->allocated_bitstream_size){
// printf("memmove\n");
memmove(s->bitstream, &s->bitstream[s->bitstream_index], s->bitstream_size);
buf_size += s->bitstream_size;
s->bitstream_size= buf_size;
- if(buf_size < s->max_framesize){
+ if(buf_size < s->max_framesize && input_buf_size){
// printf("wanna more data ...\n");
return input_buf_size;
}
init_get_bits(&s->gb, buf, buf_size*8);
- if (!metadata_parse(s))
- {
+ if(metadata_parse(s))
+ goto end;
+
tmp = show_bits(&s->gb, 16);
if((tmp & 0xFFFE) != 0xFFF8){
av_log(s->avctx, AV_LOG_ERROR, "FRAME HEADER not here\n");
s->bitstream_index=0;
return -1;
}
- }
#if 0
NULL,
flac_decode_close,
flac_decode_frame,
+ CODEC_CAP_DELAY,
.flush= flac_flush,
- .long_name= "FLAC (Free Lossless Audio Codec)"
+ .long_name= NULL_IF_CONFIG_SMALL("FLAC (Free Lossless Audio Codec)"),
};