virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

Correct the relation between floors of type 0 and block sizes.

Browse Source 
Originally committed as revision 4941 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Alexander Strasser 2006-02-05 10:16:20 +00:00
parent 809b2a30b2
commit 04c669ba98
2 changed files with 23 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
libavcodec/vorbis.c
View File

@ -170,7 +170,8 @@ static void vorbis_free(vorbis_context *vc) {
for(i=0;i<vc->floor_count;++i) {
if(vc->floors[i].floor_type==0) {
av_free(vc->floors[i].data.t0.map);
av_free(vc->floors[i].data.t0.map[0]);
av_free(vc->floors[i].data.t0.map[1]);
av_free(vc->floors[i].data.t0.book_list);
av_free(vc->floors[i].data.t0.lsp);
}
@ -418,6 +419,7 @@ static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) {
static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
vorbis_floor_data *vfu, float *vec);
static void create_map( vorbis_context * vc, uint_fast8_t floor_number );
static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
vorbis_floor_data *vfu, float *vec);
static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) {
@ -574,6 +576,8 @@ static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) {
}
}
create_map( vc, i );
/* allocate mem for lsp coefficients */
{
/* codebook dim is for padding if codebook dim doesn't *
@ -740,21 +744,23 @@ static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) {
// Process modes part
static void create_map( vorbis_context * vc, uint_fast8_t mode_number )
static void create_map( vorbis_context * vc, uint_fast8_t floor_number )
{
vorbis_floor * floors=vc->floors;
vorbis_floor0 * vf;
int idx;
int_fast8_t blockflag;
int_fast32_t * map;
int_fast32_t n; //TODO: could theoretically be smaller?
n=(vc->modes[mode_number].blockflag ?
vc->blocksize_1 : vc->blocksize_0) / 2;
floors[mode_number].data.t0.map=
for (blockflag=0;blockflag<2;++blockflag)
{
n=(blockflag ? vc->blocksize_1 : vc->blocksize_0) / 2;
floors[floor_number].data.t0.map[blockflag]=
av_malloc((n+1) * sizeof(int_fast32_t)); // n+sentinel
map=floors[mode_number].data.t0.map;
vf=&floors[mode_number].data.t0;
map=floors[floor_number].data.t0.map[blockflag];
vf=&floors[floor_number].data.t0;
for (idx=0; idx<n;++idx) {
map[idx]=floor( BARK((vf->rate*idx)/(2.0f*n)) *
@ -765,7 +771,8 @@ static void create_map( vorbis_context * vc, uint_fast8_t mode_number )
}
}
map[n]=-1;
vf->map_size=n;
vf->map_size[blockflag]=n;
}
# ifdef V_DEBUG
for(idx=0;idx<=n;++idx) {
@ -793,8 +800,6 @@ static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) {
mode_setup->mapping=get_bits(gb, 8); //FIXME check
AV_DEBUG(" %d mode: blockflag %d, windowtype %d, transformtype %d, mapping %d \n", i, mode_setup->blockflag, mode_setup->windowtype, mode_setup->transformtype, mode_setup->mapping);
if (vc->floors[i].floor_type == 0) { create_map( vc, i ); }
}
return 0;
}
@ -991,6 +996,7 @@ static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
float * lsp=vf->lsp;
uint_fast32_t amplitude;
uint_fast32_t book_idx;
uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag;
amplitude=get_bits(&vc->gb, vf->amplitude_bits);
if (amplitude>0) {
@ -1049,8 +1055,8 @@ static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
vf->map_size, order, wstep);
i=0;
while(i<vf->map_size) {
int j, iter_cond=vf->map[i];
while(i<vf->map_size[blockflag]) {
int j, iter_cond=vf->map[blockflag][i];
float p=0.5f;
float q=0.5f;
float two_cos_w=2.0f*cos(wstep*iter_cond); // needed all times
@ -1082,7 +1088,7 @@ static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
}
/* fill vector */
do { vec[i]=q; ++i; }while(vf->map[i]==iter_cond);
do { vec[i]=q; ++i; }while(vf->map[blockflag][i]==iter_cond);
}
}
}
@ -1456,6 +1462,7 @@ static int vorbis_parse_audio_packet(vorbis_context *vc) {
} else {
mode_number=get_bits(gb, ilog(vc->mode_count-1));
}
vc->mode_number=mode_number;
mapping=&vc->mappings[vc->modes[mode_number].mapping];
AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);

5
libavcodec/vorbis.h
View File

@ -29,8 +29,8 @@ typedef struct {
uint_fast8_t order;
uint_fast16_t rate;
uint_fast16_t bark_map_size;
int_fast32_t * map;
uint_fast32_t map_size;
int_fast32_t * map[2];
uint_fast32_t map_size[2];
uint_fast8_t amplitude_bits;
uint_fast8_t amplitude_offset;
uint_fast8_t num_books;
@ -111,6 +111,7 @@ typedef struct vorbis_context_s {
vorbis_mapping *mappings;
uint_fast8_t mode_count;
vorbis_mode *modes;
uint_fast8_t mode_number; // mode number for the current packet
float *channel_residues;
float *channel_floors;
float *saved;