| /* |
| * (C) 2014 by On-Waves |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| #ifndef OPENBSC_MGCP_TRANSCODE_H |
| #define OPENBSC_MGCP_TRANSCODE_H |
| |
| #include "bscconfig.h" |
| |
| #include <gsm.h> |
| #ifdef HAVE_BCG729 |
| #include <bcg729/decoder.h> |
| #include <bcg729/encoder.h> |
| #endif |
| |
| enum audio_format { |
| AF_INVALID, |
| AF_S16, |
| AF_L16, |
| AF_GSM, |
| AF_G729, |
| AF_PCMA, |
| AF_PCMU |
| }; |
| |
| |
| struct mgcp_process_rtp_state { |
| /* decoding */ |
| enum audio_format src_fmt; |
| union { |
| gsm gsm_handle; |
| #ifdef HAVE_BCG729 |
| bcg729DecoderChannelContextStruct *g729_dec; |
| #endif |
| } src; |
| size_t src_frame_size; |
| size_t src_samples_per_frame; |
| |
| /* processing */ |
| |
| /* encoding */ |
| enum audio_format dst_fmt; |
| union { |
| gsm gsm_handle; |
| #ifdef HAVE_BCG729 |
| bcg729EncoderChannelContextStruct *g729_enc; |
| #endif |
| } dst; |
| size_t dst_frame_size; |
| size_t dst_samples_per_frame; |
| int dst_packet_duration; |
| |
| int is_running; |
| uint16_t next_seq; |
| uint32_t next_time; |
| int16_t samples[10*160]; |
| size_t sample_cnt; |
| size_t sample_offs; |
| }; |
| |
| |
| int mgcp_transcoding_setup(struct mgcp_endpoint *endp, |
| struct mgcp_rtp_end *dst_end, |
| struct mgcp_rtp_end *src_end); |
| |
| void mgcp_transcoding_net_downlink_format(struct mgcp_endpoint *endp, |
| int *payload_type, |
| const char**audio_name, |
| const char**fmtp_extra); |
| |
| int mgcp_transcoding_process_rtp(struct mgcp_endpoint *endp, |
| struct mgcp_rtp_end *dst_end, |
| char *data, int *len, int buf_size); |
| |
| int mgcp_transcoding_get_frame_size(void *state_, int nsamples, int dst); |
| #endif /* OPENBSC_MGCP_TRANSCODE_H */ |