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share some constants between the FLAC encoder and FLAC decoder

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Originally committed as revision 18041 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2009-03-19 03:04:21 +00:00
parent bb504ac45e
commit 07d16e2ecf
3 changed files with 10 additions and 15 deletions
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3
libavcodec/flac.h
View File

@ -30,6 +30,9 @@
#include "avcodec.h"
#define FLAC_STREAMINFO_SIZE 34
#define FLAC_MAX_CHANNELS 8
#define FLAC_MIN_BLOCKSIZE 16
#define FLAC_MAX_BLOCKSIZE 65535
enum {
FLAC_METADATA_TYPE_STREAMINFO = 0,

11
libavcodec/flacdec.c
View File

@ -46,9 +46,6 @@
#undef NDEBUG
#include <assert.h>
#define MAX_CHANNELS 8
#define MAX_BLOCKSIZE 65535
enum decorrelation_type {
INDEPENDENT,
LEFT_SIDE,
@ -69,7 +66,7 @@ typedef struct FLACContext {
enum decorrelation_type decorrelation; ///< channel decorrelation type in the current frame
int got_streaminfo; ///< indicates if the STREAMINFO has been read
int32_t *decoded[MAX_CHANNELS]; ///< decoded samples
int32_t *decoded[FLAC_MAX_CHANNELS]; ///< decoded samples
uint8_t *bitstream;
unsigned int bitstream_size;
unsigned int bitstream_index;
@ -190,7 +187,7 @@ void ff_flac_parse_streaminfo(AVCodecContext *avctx, struct FLACStreaminfo *s,
skip_bits(&gb, 16); /* skip min blocksize */
s->max_blocksize = get_bits(&gb, 16);
if (s->max_blocksize < 16) {
if (s->max_blocksize < FLAC_MIN_BLOCKSIZE) {
av_log(avctx, AV_LOG_WARNING, "invalid max blocksize: %d\n",
s->max_blocksize);
s->max_blocksize = 16;
@ -510,9 +507,9 @@ static int decode_frame(FLACContext *s, int alloc_data_size)
sample_rate_code = get_bits(&s->gb, 4);
assignment = get_bits(&s->gb, 4); /* channel assignment */
if (assignment < 8 && s->channels == assignment+1)
if (assignment < FLAC_MAX_CHANNELS && s->channels == assignment+1)
decorrelation = INDEPENDENT;
else if (assignment >=8 && assignment < 11 && s->channels == 2)
else if (assignment >= FLAC_MAX_CHANNELS && assignment < 11 && s->channels == 2)
decorrelation = LEFT_SIDE + assignment - 8;
else {
av_log(s->avctx, AV_LOG_ERROR, "unsupported channel assignment %d (channels=%d)\n",

11
libavcodec/flacenc.c
View File

@ -27,10 +27,7 @@
#include "dsputil.h"
#include "golomb.h"
#include "lpc.h"
#define FLAC_MAX_CH 8
#define FLAC_MIN_BLOCKSIZE 16
#define FLAC_MAX_BLOCKSIZE 65535
#include "flac.h"
#define FLAC_SUBFRAME_CONSTANT 0
#define FLAC_SUBFRAME_VERBATIM 1
@ -43,8 +40,6 @@
#define FLAC_CHMODE_RIGHT_SIDE 9
#define FLAC_CHMODE_MID_SIDE 10
#define FLAC_STREAMINFO_SIZE 34
#define MAX_FIXED_ORDER 4
#define MAX_PARTITION_ORDER 8
#define MAX_PARTITIONS (1 << MAX_PARTITION_ORDER)
@ -82,7 +77,7 @@ typedef struct FlacSubframe {
} FlacSubframe;
typedef struct FlacFrame {
FlacSubframe subframes[FLAC_MAX_CH];
FlacSubframe subframes[FLAC_MAX_CHANNELS];
int blocksize;
int bs_code[2];
uint8_t crc8;
@ -185,7 +180,7 @@ static av_cold int flac_encode_init(AVCodecContext *avctx)
return -1;
}
if(channels < 1 || channels > FLAC_MAX_CH) {
if(channels < 1 || channels > FLAC_MAX_CHANNELS) {
return -1;
}
s->channels = channels;