static av_cold int oggvorbis_encode_init(AVCodecContext *avccontext) {
OggVorbisContext *context = avccontext->priv_data ;
ogg_packet header, header_comm, header_code;
uint8_t *p;
unsigned int offset, len;
vorbis_info_init(&context->vi) ;
if(oggvorbis_init_encoder(&context->vi, avccontext) < 0) {
av_log(avccontext, AV_LOG_ERROR, "oggvorbis_encode_init: init_encoder failed") ;
return -1 ;
}
vorbis_analysis_init(&context->vd, &context->vi) ;
vorbis_block_init(&context->vd, &context->vb) ;
vorbis_comment_init(&context->vc);
vorbis_comment_add_tag(&context->vc, "encoder", LIBAVCODEC_IDENT) ;
vorbis_analysis_headerout(&context->vd, &context->vc, &header,
&header_comm, &header_code);
len = header.bytes + header_comm.bytes + header_code.bytes;
avccontext->extradata_size= 64 + len + len/255;
p = avccontext->extradata= av_mallocz(avccontext->extradata_size);
p[0] = 2;
offset = 1;
offset += av_xiphlacing(&p[offset], header.bytes);
offset += av_xiphlacing(&p[offset], header_comm.bytes);
memcpy(&p[offset], header.packet, header.bytes);
offset += header.bytes;
memcpy(&p[offset], header_comm.packet, header_comm.bytes);
offset += header_comm.bytes;
memcpy(&p[offset], header_code.packet, header_code.bytes);
offset += header_code.bytes;
avccontext->extradata_size = offset;
avccontext->extradata= av_realloc(avccontext->extradata, avccontext->extradata_size);
/* vorbis_block_clear(&context->vb);
vorbis_dsp_clear(&context->vd);
vorbis_info_clear(&context->vi);*/
vorbis_comment_clear(&context->vc);
avccontext->frame_size = OGGVORBIS_FRAME_SIZE ;
avccontext->coded_frame= avcodec_alloc_frame();
avccontext->coded_frame->key_frame= 1;
return 0 ;
}
static unsigned int
fixup_vorbis_headers(AVFormatContext * as, oggvorbis_private_t *priv,
void **buf)
{
int i,offset, len;
unsigned char *ptr;
len = priv->len[0] + priv->len[1] + priv->len[2];
ptr = *buf = av_mallocz(len + len/255 + 64);
ptr[0] = 2;
offset = 1;
offset += av_xiphlacing(&ptr[offset], priv->len[0]);
offset += av_xiphlacing(&ptr[offset], priv->len[1]);
for(i = 0; i < 3; i++) {
memcpy(&ptr[offset], priv->packet[i], priv->len[i]);
offset += priv->len[i];
}
*buf = av_realloc(*buf, offset);
return offset;
}