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vorbisenc: remove VLAs

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Originally committed as revision 25183 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård
2010-09-24 20:42:08 +00:00
parent a6881c6a38
commit d66a546f77
1 changed files with 17 additions and 6 deletions
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23
libavcodec/vorbis_enc.c
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@ -126,6 +126,17 @@ typedef struct {
int64_t sample_count; int64_t sample_count;
} vorbis_enc_context; } vorbis_enc_context;
#define MAX_CHANNELS 2
#define MAX_CODEBOOK_DIM 8
#define MAX_FLOOR_CLASS_DIM 4
#define NUM_FLOOR_PARTITIONS 8
#define MAX_FLOOR_VALUES (MAX_FLOOR_CLASS_DIM*NUM_FLOOR_PARTITIONS+2)
#define RESIDUE_SIZE 1600
#define RESIDUE_PART_SIZE 32
#define NUM_RESIDUE_PARTITIONS (RESIDUE_SIZE/RESIDUE_PART_SIZE)
static inline void put_codeword(PutBitContext *pb, vorbis_enc_codebook *cb, static inline void put_codeword(PutBitContext *pb, vorbis_enc_codebook *cb,
int entry) int entry)
{ {
@ -263,7 +274,7 @@ static void create_vorbis_context(vorbis_enc_context *venc,
// just 1 floor // just 1 floor
fc = &venc->floors[0]; fc = &venc->floors[0];
fc->partitions = 8; fc->partitions = NUM_FLOOR_PARTITIONS;
fc->partition_to_class = av_malloc(sizeof(int) * fc->partitions); fc->partition_to_class = av_malloc(sizeof(int) * fc->partitions);
fc->nclasses = 0; fc->nclasses = 0;
for (i = 0; i < fc->partitions; i++) { for (i = 0; i < fc->partitions; i++) {
@ -668,7 +679,7 @@ static void floor_fit(vorbis_enc_context *venc, vorbis_enc_floor *fc,
int range = 255 / fc->multiplier + 1; int range = 255 / fc->multiplier + 1;
int i; int i;
float tot_average = 0.; float tot_average = 0.;
float averages[fc->values]; float averages[MAX_FLOOR_VALUES];
for (i = 0; i < fc->values; i++) { for (i = 0; i < fc->values; i++) {
averages[i] = get_floor_average(fc, coeffs, i); averages[i] = get_floor_average(fc, coeffs, i);
tot_average += averages[i]; tot_average += averages[i];
@ -699,7 +710,7 @@ static void floor_encode(vorbis_enc_context *venc, vorbis_enc_floor *fc,
float *floor, int samples) float *floor, int samples)
{ {
int range = 255 / fc->multiplier + 1; int range = 255 / fc->multiplier + 1;
int coded[fc->values]; // first 2 values are unused int coded[MAX_FLOOR_VALUES]; // first 2 values are unused
int i, counter; int i, counter;
put_bits(pb, 1, 1); // non zero put_bits(pb, 1, 1); // non zero
@ -807,7 +818,7 @@ static void residue_encode(vorbis_enc_context *venc, vorbis_enc_residue *rc,
int psize = rc->partition_size; int psize = rc->partition_size;
int partitions = (rc->end - rc->begin) / psize; int partitions = (rc->end - rc->begin) / psize;
int channels = (rc->type == 2) ? 1 : real_ch; int channels = (rc->type == 2) ? 1 : real_ch;
int classes[channels][partitions]; int classes[MAX_CHANNELS][NUM_RESIDUE_PARTITIONS];
int classwords = venc->codebooks[rc->classbook].ndimentions; int classwords = venc->codebooks[rc->classbook].ndimentions;
assert(rc->type == 2); assert(rc->type == 2);
@ -864,7 +875,7 @@ static void residue_encode(vorbis_enc_context *venc, vorbis_enc_residue *rc,
s = real_ch * samples; s = real_ch * samples;
for (k = 0; k < psize; k += book->ndimentions) { for (k = 0; k < psize; k += book->ndimentions) {
int dim, a2 = a1, b2 = b1; int dim, a2 = a1, b2 = b1;
float vec[book->ndimentions], *pv = vec; float vec[MAX_CODEBOOK_DIM], *pv = vec;
for (dim = book->ndimentions; dim--; ) { for (dim = book->ndimentions; dim--; ) {
*pv++ = coeffs[a2 + b2]; *pv++ = coeffs[a2 + b2];
if ((a2 += samples) == s) { if ((a2 += samples) == s) {
@ -999,7 +1010,7 @@ static int vorbis_encode_frame(AVCodecContext *avccontext,
for (i = 0; i < venc->channels; i++) { for (i = 0; i < venc->channels; i++) {
vorbis_enc_floor *fc = &venc->floors[mapping->floor[mapping->mux[i]]]; vorbis_enc_floor *fc = &venc->floors[mapping->floor[mapping->mux[i]]];
uint_fast16_t posts[fc->values]; uint_fast16_t posts[MAX_FLOOR_VALUES];
floor_fit(venc, fc, &venc->coeffs[i * samples], posts, samples); floor_fit(venc, fc, &venc->coeffs[i * samples], posts, samples);
floor_encode(venc, fc, &pb, posts, &venc->floor[i * samples], samples); floor_encode(venc, fc, &pb, posts, &venc->floor[i * samples], samples);
} }