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/*
* Copyright (C) 2013 Intel Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <time.h>
#include <hardware/audio.h>
#if __BYTE_ORDER == __LITTLE_ENDIAN
struct rtp_header {
unsigned cc:4;
unsigned x:1;
unsigned p:1;
unsigned v:2;
unsigned pt:7;
unsigned m:1;
uint16_t sequence_number;
uint32_t timestamp;
uint32_t ssrc;
uint32_t csrc[0];
} __attribute__ ((packed));
struct rtp_payload {
unsigned frame_count:4;
unsigned rfa0:1;
unsigned is_last_fragment:1;
unsigned is_first_fragment:1;
unsigned is_fragmented:1;
} __attribute__ ((packed));
#elif __BYTE_ORDER == __BIG_ENDIAN
struct rtp_header {
unsigned v:2;
unsigned p:1;
unsigned x:1;
unsigned cc:4;
unsigned m:1;
unsigned pt:7;
uint16_t sequence_number;
uint32_t timestamp;
uint32_t ssrc;
uint32_t csrc[0];
} __attribute__ ((packed));
struct rtp_payload {
unsigned is_fragmented:1;
unsigned is_first_fragment:1;
unsigned is_last_fragment:1;
unsigned rfa0:1;
unsigned frame_count:4;
} __attribute__ ((packed));
#else
#error "Unknown byte order"
#endif
struct media_packet {
struct rtp_header hdr;
struct rtp_payload payload;
uint8_t data[0];
};
struct audio_input_config {
uint32_t rate;
uint32_t channels;
audio_format_t format;
};
struct audio_codec {
uint8_t type;
int (*get_presets) (struct audio_preset *preset, size_t *len);
bool (*init) (struct audio_preset *preset, uint16_t mtu,
void **codec_data);
bool (*cleanup) (void *codec_data);
bool (*get_config) (void *codec_data,
struct audio_input_config *config);
size_t (*get_buffer_size) (void *codec_data);
size_t (*get_mediapacket_duration) (void *codec_data);
ssize_t (*encode_mediapacket) (void *codec_data, const uint8_t *buffer,
size_t len, struct media_packet *mp,
size_t mp_data_len, size_t *written);
bool (*update_qos) (void *codec_data, uint8_t op);
};
#define QOS_POLICY_DEFAULT 0x00
#define QOS_POLICY_DECREASE 0x01
typedef const struct audio_codec * (*audio_codec_get_t) (void);
const struct audio_codec *codec_sbc(void);
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