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Original Commit: r14 | ods15 | 2006-09-22 12:26:17 +0300 (Fri, 22 Sep 2006) | 2 lines

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use several codebooks and passes to prevent header from being several MB...

Originally committed as revision 6425 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Oded Shimon 2006-10-02 05:55:37 +00:00
parent 3c83828ca4
commit e08d964df6
1 changed files with 17 additions and 15 deletions
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32
libavcodec/vorbis_enc.c
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@ -164,13 +164,13 @@ static void ready_codebook(codebook_t * cb) {
static void create_vorbis_context(venc_context_t * venc, AVCodecContext * avccontext) {
codebook_t * cb;
int i;
int i, book;
venc->channels = avccontext->channels;
venc->sample_rate = avccontext->sample_rate;
venc->blocksize[0] = venc->blocksize[1] = 8;
venc->ncodebooks = 3;
venc->ncodebooks = 10;
venc->codebooks = av_malloc(sizeof(codebook_t) * venc->ncodebooks);
// codebook 1 - floor1 book, values 0..255
@ -199,19 +199,21 @@ static void create_vorbis_context(venc_context_t * venc, AVCodecContext * avccon
cb->quantlist = NULL;
ready_codebook(cb);
// codebook 3 - vector, for the residue, dimentions 1. values -32768..32767
cb = &venc->codebooks[2];
cb->nentries = 32767 - (-32768);
cb->entries = av_malloc(sizeof(cb_entry_t) * cb->nentries);
for (i = 0; i < cb->nentries; i++) cb->entries[i].len = 16;
cb->ndimentions = 1;
cb->min = -32768.;
cb->delta = 1.;
cb->seq_p = 0;
cb->lookup = 2;
cb->quantlist = av_malloc(sizeof(int) * cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries));
for (i = 0; i < cb->nentries; i++) cb->quantlist[i] = i;
ready_codebook(cb);
// codebook 3..10 - vector, for the residue, values -32767..32767, dimentions 1
for (book = 0; book < 8; book++) {
cb = &venc->codebooks[2 + book];
cb->nentries = 5;
cb->entries = av_malloc(sizeof(cb_entry_t) * cb->nentries);
for (i = 0; i < cb->nentries; i++) cb->entries[i].len = i == 2 ? 1 : 3;
cb->ndimentions = 1;
cb->delta = 1 << ((7 - book) * 2);
cb->min = -cb->delta*2;
cb->seq_p = 0;
cb->lookup = 2;
cb->quantlist = av_malloc(sizeof(int) * cb_lookup_vals(cb->lookup, cb->ndimentions, cb->nentries));
for (i = 0; i < cb->nentries; i++) cb->quantlist[i] = i;
ready_codebook(cb);
}
}