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Code Issues Releases Activity

vorbisdec: remove variable-length arrays

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Originally committed as revision 23960 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-07-01 23:36:48 +00:00
parent cf61994a17
commit 3c35da2f7f
1 changed files with 23 additions and 11 deletions
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34
libavcodec/vorbis_dec.c
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@ -102,6 +102,8 @@ typedef struct {
uint_fast8_t classbook;
int_fast16_t books[64][8];
uint_fast8_t maxpass;
uint_fast16_t ptns_to_read;
uint_fast8_t *classifs;
} vorbis_residue;
typedef struct {
@ -194,6 +196,8 @@ static void vorbis_free(vorbis_context *vc)
av_freep(&vc->channel_floors);
av_freep(&vc->saved);
for (i = 0; i < vc->residue_count; i++)
av_free(vc->residues[i].classifs);
av_freep(&vc->residues);
av_freep(&vc->modes);
@ -236,6 +240,7 @@ static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
uint8_t *tmp_vlc_bits;
uint32_t *tmp_vlc_codes;
GetBitContext *gb = &vc->gb;
uint_fast16_t *codebook_multiplicands;
vc->codebook_count = get_bits(gb, 8) + 1;
@ -244,6 +249,7 @@ static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
vc->codebooks = av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(uint8_t));
tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(uint32_t));
codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
for (cb = 0; cb < vc->codebook_count; ++cb) {
vorbis_codebook *codebook_setup = &vc->codebooks[cb];
@ -336,7 +342,6 @@ static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
if (codebook_setup->lookup_type == 1) {
uint_fast16_t i, j, k;
uint_fast16_t codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
uint_fast16_t codebook_multiplicands[codebook_lookup_values];
float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
@ -420,12 +425,14 @@ static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
av_free(tmp_vlc_bits);
av_free(tmp_vlc_codes);
av_free(codebook_multiplicands);
return 0;
// Error:
error:
av_free(tmp_vlc_bits);
av_free(tmp_vlc_codes);
av_free(codebook_multiplicands);
return -1;
}
@ -654,6 +661,12 @@ static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
res_setup->classifications = get_bits(gb, 6) + 1;
GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
res_setup->ptns_to_read =
(res_setup->end - res_setup->begin) / res_setup->partition_size;
res_setup->classifs = av_malloc(res_setup->ptns_to_read *
vc->audio_channels *
sizeof(*res_setup->classifs));
AV_DEBUG(" begin %d end %d part.size %d classif.s %d classbook %d \n", res_setup->begin, res_setup->end, res_setup->partition_size,
res_setup->classifications, res_setup->classbook);
@ -1116,9 +1129,9 @@ static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
GetBitContext *gb = &vc->gb;
uint_fast16_t range_v[4] = { 256, 128, 86, 64 };
uint_fast16_t range = range_v[vf->multiplier-1];
uint_fast16_t floor1_Y[vf->x_list_dim];
uint_fast16_t floor1_Y_final[vf->x_list_dim];
int floor1_flag[vf->x_list_dim];
uint_fast16_t floor1_Y[258];
uint_fast16_t floor1_Y_final[258];
int floor1_flag[258];
uint_fast8_t class_;
uint_fast8_t cdim;
uint_fast8_t cbits;
@ -1252,9 +1265,8 @@ static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
{
GetBitContext *gb = &vc->gb;
uint_fast8_t c_p_c = vc->codebooks[vr->classbook].dimensions;
uint_fast16_t n_to_read = vr->end-vr->begin;
uint_fast16_t ptns_to_read = n_to_read/vr->partition_size;
uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
uint_fast16_t ptns_to_read = vr->ptns_to_read;
uint_fast8_t *classifs = vr->classifs;
uint_fast8_t pass;
uint_fast8_t ch_used;
uint_fast8_t i,j,l;
@ -1450,12 +1462,12 @@ static int vorbis_parse_audio_packet(vorbis_context *vc)
uint_fast8_t blockflag;
uint_fast16_t blocksize;
int_fast32_t i,j;
uint_fast8_t no_residue[vc->audio_channels];
uint_fast8_t do_not_decode[vc->audio_channels];
uint_fast8_t no_residue[255];
uint_fast8_t do_not_decode[255];
vorbis_mapping *mapping;
float *ch_res_ptr = vc->channel_residues;
float *ch_floor_ptr = vc->channel_floors;
uint_fast8_t res_chan[vc->audio_channels];
uint_fast8_t res_chan[255];
uint_fast8_t res_num = 0;
int_fast16_t retlen = 0;
float fadd_bias = vc->add_bias;
@ -1587,7 +1599,7 @@ static int vorbis_decode_frame(AVCodecContext *avccontext,
int buf_size = avpkt->size;
vorbis_context *vc = avccontext->priv_data ;
GetBitContext *gb = &(vc->gb);
const float *channel_ptrs[vc->audio_channels];
const float *channel_ptrs[255];
int i;
int_fast16_t len;