openharmony/third_party_ffmpeg
1
0
Fork 0
mirror of https://gitee.com/openharmony/third_party_ffmpeg synced 2024-11-23 19:30:05 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Fix an out of array access and some minor cleanup of the code.

Browse Source 
All available cook samples decode correctly now.
patch by Benjamin Larsson < banan ** at ** student ** dot ** ltu ** dot ** se >

Originally committed as revision 4810 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Benjamin Larsson 2006-01-04 12:48:10 +00:00 committed by Diego Biurrun
parent 1499e0bee9
commit 7022003581
1 changed files with 15 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
libavcodec/cook.c
View File

@ -131,11 +131,6 @@ typedef struct {
float rootpow2tab[127];
/* data buffers */
uint8_t* frame_reorder_buffer;
int* frame_reorder_index;
int frame_reorder_counter;
int frame_reorder_complete;
int frame_reorder_index_size;
uint8_t* decoded_bytes_buffer;
float mono_mdct_output[2048] __attribute__((aligned(16)));
@ -325,8 +320,6 @@ static int cook_decode_close(AVCodecContext *avctx)
av_free(q->mlt_precos);
av_free(q->mlt_presin);
av_free(q->mlt_postcos);
av_free(q->frame_reorder_index);
av_free(q->frame_reorder_buffer);
av_free(q->decoded_bytes_buffer);
/* Free the transform. */
@ -915,7 +908,7 @@ static void joint_decode(COOKContext *q, float* mlt_buffer1,
float* mlt_buffer2) {
int i,j;
int decouple_tab[SUBBAND_SIZE];
float decode_buffer[2048]; //Only 1060 might be needed.
float decode_buffer[1060];
int idx, cpl_tmp,tmp_idx;
float f1,f2;
float* cplscale;
@ -940,20 +933,18 @@ static void joint_decode(COOKContext *q, float* mlt_buffer1,
/* When we reach js_subband_start (the higher frequencies)
the coefficients are stored in a coupling scheme. */
idx = (1 << q->js_vlc_bits) - 1;
if (q->js_subband_start < q->subbands) {
for (i=0 ; i<q->subbands ; i++) {
cpl_tmp = cplband[i + q->js_subband_start];
idx -=decouple_tab[cpl_tmp];
cplscale = (float*)cplscales[q->js_vlc_bits-2]; //choose decoupler table
f1 = cplscale[decouple_tab[cpl_tmp]];
f2 = cplscale[idx-1];
for (j=0 ; j<SUBBAND_SIZE ; j++) {
tmp_idx = ((2*q->js_subband_start + i)*20)+j;
mlt_buffer1[20*(i+q->js_subband_start) + j] = f1 * decode_buffer[tmp_idx];
mlt_buffer2[20*(i+q->js_subband_start) + j] = f2 * decode_buffer[tmp_idx];
}
idx = (1 << q->js_vlc_bits) - 1;
for (i=q->js_subband_start ; i<q->subbands ; i++) {
cpl_tmp = cplband[i];
idx -=decouple_tab[cpl_tmp];
cplscale = (float*)cplscales[q->js_vlc_bits-2]; //choose decoupler table
f1 = cplscale[decouple_tab[cpl_tmp]];
f2 = cplscale[idx-1];
for (j=0 ; j<SUBBAND_SIZE ; j++) {
tmp_idx = ((q->js_subband_start + i)*20)+j;
mlt_buffer1[20*i + j] = f1 * decode_buffer[tmp_idx];
mlt_buffer2[20*i + j] = f2 * decode_buffer[tmp_idx];
}
idx = (1 << q->js_vlc_bits) - 1;
}
}
@ -1159,8 +1150,6 @@ static void dump_cook_context(COOKContext *q, COOKextradata *e)
PRINT("numvector_bits",q->numvector_bits);
PRINT("numvector_size",q->numvector_size);
PRINT("total_subbands",q->total_subbands);
PRINT("frame_reorder_counter",q->frame_reorder_counter);
PRINT("frame_reorder_index_size",q->frame_reorder_index_size);
}
#endif
/**
@ -1293,8 +1282,9 @@ static int cook_decode_init(AVCodecContext *avctx)
/* Initialize transform. */
if ( init_cook_mlt(q) == 0 )
return -1;
//dump_cook_context(q,e);
#ifdef COOKDEBUG
dump_cook_context(q,e);
#endif
return 0;
}