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; 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\n"); 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); avccontext->extradata_size = 1 + xiph_len(header.bytes) + xiph_len(header_comm.bytes) + header_code.bytes; p = avccontext->extradata = av_malloc(avccontext->extradata_size + FF_INPUT_BUFFER_PADDING_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; assert(offset == avccontext->extradata_size); #if 0 vorbis_block_clear(&context->vb); vorbis_dsp_clear(&context->vd); vorbis_info_clear(&context->vi); #endif vorbis_comment_clear(&context->vc); avccontext->frame_size = OGGVORBIS_FRAME_SIZE; avccontext->coded_frame = avcodec_alloc_frame(); return 0; }