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Original Commit: r41 | ods15 | 2006-09-23 10:52:34 +0300 (Sat, 23 Sep 2006) | 4 lines

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residue packet encode

ACTUALLY ENCODES NOW!! still some bugs to fix :)

Originally committed as revision 6449 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Oded Shimon 2006-10-02 05:56:30 +00:00
parent 6fbf5855b1
commit b452ee42f5
1 changed files with 68 additions and 1 deletions
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69
libavcodec/vorbis_enc.c
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@ -661,6 +661,60 @@ static int window(venc_context_t * venc, signed short * audio, int samples) {
return 1; return 1;
} }
static float put_vector(codebook_t * book, PutBitContext * pb, float num) {
int i;
int entry = -1;
float distance = 0;
assert(book->dimentions);
assert(book->ndimentions == 1);
for (i = 0; i < book->nentries; i++) {
float d = (book->dimentions[i] - num)*(book->dimentions[i] - num);
if (entry == -1 || distance > d) {
entry = i;
distance = d;
}
}
put_bits(pb, book->entries[entry].len, book->entries[entry].codeword);
return book->dimentions[entry];
}
static void residue_encode(venc_context_t * venc, residue_t * rc, PutBitContext * pb, float * coeffs, int samples, int channels) {
int pass, i, j, p, k;
int psize = rc->partition_size;
int partitions = (rc->end - rc->begin) / psize;
int classes[channels][partitions];
int classwords = venc->codebooks[rc->classbook].ndimentions;
for (pass = 0; pass < 8; pass++) {
p = 0;
while (p < partitions) {
if (pass == 0) for (j = 0; j < channels; j++) {
codebook_t * book = &venc->codebooks[rc->classbook];
int entry = 0;
put_bits(pb, book->entries[entry].len, book->entries[entry].codeword);
for (i = classwords; i--; ) {
classes[j][p + i] = entry % rc->classifications;
entry /= rc->classifications;
}
}
for (i = 0; i < classwords && p < partitions; i++, p++) {
for (j = 0; j < channels; j++) {
int nbook = rc->books[classes[j][p]][pass];
codebook_t * book = &venc->codebooks[nbook];
float * buf = coeffs + samples*j + rc->begin + p*psize;
assert(rc->type == 0);
assert(book->ndimentions == 1);
for (k = 0; k < psize; k++) {
buf[k] -= put_vector(book, pb, buf[k]);
}
}
}
}
}
}
static int vorbis_encode_frame(AVCodecContext * avccontext, unsigned char * packets, int buf_size, void *data) static int vorbis_encode_frame(AVCodecContext * avccontext, unsigned char * packets, int buf_size, void *data)
{ {
venc_context_t * venc = avccontext->priv_data; venc_context_t * venc = avccontext->priv_data;
@ -702,9 +756,22 @@ static int vorbis_encode_frame(AVCodecContext * avccontext, unsigned char * pack
put_bits(&pb, book->entries[entry].len, book->entries[entry].codeword); put_bits(&pb, book->entries[entry].len, book->entries[entry].codeword);
} }
} }
for (j = 0; j < samples; j++) {
venc->floor[i * samples + j] = floor1_inverse_db_table[220];
}
} }
return data ? 50 : 0; for (i = 0; i < venc->channels; i++) {
int j;
for (j = 0; j < samples; j++) {
venc->coeffs[i * samples + j] /= venc->floor[i * samples + j];
}
}
residue_encode(venc, &venc->residues[mapping->residue[mapping->mux[0]]], &pb, venc->coeffs, samples, venc->channels);
return (put_bits_count(&pb) + 7) / 8;
} }