diff options
Diffstat (limited to 'pjmedia/src/pjmedia-codec/passthrough.c')
| -rw-r--r-- | pjmedia/src/pjmedia-codec/passthrough.c | 850 |
1 files changed, 850 insertions, 0 deletions
diff --git a/pjmedia/src/pjmedia-codec/passthrough.c b/pjmedia/src/pjmedia-codec/passthrough.c new file mode 100644 index 00000000..0374bc00 --- /dev/null +++ b/pjmedia/src/pjmedia-codec/passthrough.c @@ -0,0 +1,850 @@ +/* $Id$ */ +/* + * Copyright (C) 2008-2009 Teluu Inc. (http://www.teluu.com) + * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <pjmedia-codec/passthrough.h> +#include <pjmedia/codec.h> +#include <pjmedia/errno.h> +#include <pjmedia/endpoint.h> +#include <pjmedia/port.h> +#include <pj/assert.h> +#include <pj/log.h> +#include <pj/pool.h> +#include <pj/string.h> +#include <pj/os.h> + +/* + * Only build this file if PJMEDIA_HAS_PASSTHROUGH_CODECS != 0 + */ +#if defined(PJMEDIA_HAS_PASSTHROUGH_CODECS) && PJMEDIA_HAS_PASSTHROUGH_CODECS!=0 + +#define THIS_FILE "passthrough.c" + + +/* Prototypes for passthrough codecs factory */ +static pj_status_t test_alloc( pjmedia_codec_factory *factory, + const pjmedia_codec_info *id ); +static pj_status_t default_attr( pjmedia_codec_factory *factory, + const pjmedia_codec_info *id, + pjmedia_codec_param *attr ); +static pj_status_t enum_codecs( pjmedia_codec_factory *factory, + unsigned *count, + pjmedia_codec_info codecs[]); +static pj_status_t alloc_codec( pjmedia_codec_factory *factory, + const pjmedia_codec_info *id, + pjmedia_codec **p_codec); +static pj_status_t dealloc_codec( pjmedia_codec_factory *factory, + pjmedia_codec *codec ); + +/* Prototypes for passthrough codecs implementation. */ +static pj_status_t codec_init( pjmedia_codec *codec, + pj_pool_t *pool ); +static pj_status_t codec_open( pjmedia_codec *codec, + pjmedia_codec_param *attr ); +static pj_status_t codec_close( pjmedia_codec *codec ); +static pj_status_t codec_modify(pjmedia_codec *codec, + const pjmedia_codec_param *attr ); +static pj_status_t codec_parse( pjmedia_codec *codec, + void *pkt, + pj_size_t pkt_size, + const pj_timestamp *ts, + unsigned *frame_cnt, + pjmedia_frame frames[]); +static pj_status_t codec_encode( pjmedia_codec *codec, + const struct pjmedia_frame *input, + unsigned output_buf_len, + struct pjmedia_frame *output); +static pj_status_t codec_decode( pjmedia_codec *codec, + const struct pjmedia_frame *input, + unsigned output_buf_len, + struct pjmedia_frame *output); +static pj_status_t codec_recover( pjmedia_codec *codec, + unsigned output_buf_len, + struct pjmedia_frame *output); + +/* Definition for passthrough codecs operations. */ +static pjmedia_codec_op codec_op = +{ + &codec_init, + &codec_open, + &codec_close, + &codec_modify, + &codec_parse, + &codec_encode, + &codec_decode, + &codec_recover +}; + +/* Definition for passthrough codecs factory operations. */ +static pjmedia_codec_factory_op codec_factory_op = +{ + &test_alloc, + &default_attr, + &enum_codecs, + &alloc_codec, + &dealloc_codec +}; + +/* Passthrough codecs factory */ +static struct codec_factory { + pjmedia_codec_factory base; + pjmedia_endpt *endpt; + pj_pool_t *pool; + pj_mutex_t *mutex; +} codec_factory; + +/* Passthrough codecs private data. */ +typedef struct codec_private { + pj_pool_t *pool; /**< Pool for each instance. */ + int codec_idx; /**< Codec index. */ + void *codec_setting; /**< Specific codec setting. */ + pj_uint16_t avg_frame_size; /**< Average of frame size. */ +} codec_private_t; + + + +/* CUSTOM CALLBACKS */ + +/* Parse frames from a packet. Default behaviour of frame parsing is + * just separating frames based on calculating frame length derived + * from bitrate. Implement this callback when the default behaviour is + * unapplicable. + */ +typedef pj_status_t (*parse_cb)(codec_private_t *codec_data, void *pkt, + pj_size_t pkt_size, const pj_timestamp *ts, + unsigned *frame_cnt, pjmedia_frame frames[]); + +/* Pack frames into a packet. Default behaviour of packing frames is + * just stacking the frames with octet aligned without adding any + * payload header. Implement this callback when the default behaviour is + * unapplicable. + */ +typedef pj_status_t (*pack_cb)(codec_private_t *codec_data, + const struct pjmedia_frame_ext *input, + unsigned output_buf_len, + struct pjmedia_frame *output); + + +/* Custom callback implementations. */ +static pj_status_t parse_amr( codec_private_t *codec_data, void *pkt, + pj_size_t pkt_size, const pj_timestamp *ts, + unsigned *frame_cnt, pjmedia_frame frames[]); +static pj_status_t pack_amr ( codec_private_t *codec_data, + const struct pjmedia_frame_ext *input, + unsigned output_buf_len, + struct pjmedia_frame *output); + + +/* Passthrough codec implementation descriptions. */ +static struct codec_desc { + int enabled; /* Is this codec enabled? */ + const char *name; /* Codec name. */ + pj_uint8_t pt; /* Payload type. */ + pjmedia_format_id fmt_id; /* Source format. */ + unsigned clock_rate; /* Codec's clock rate. */ + unsigned channel_count; /* Codec's channel count. */ + unsigned samples_per_frame; /* Codec's samples count. */ + unsigned def_bitrate; /* Default bitrate of this codec. */ + unsigned max_bitrate; /* Maximum bitrate of this codec. */ + pj_uint8_t frm_per_pkt; /* Default num of frames per packet.*/ + pj_uint8_t vad; /* VAD enabled/disabled. */ + pj_uint8_t plc; /* PLC enabled/disabled. */ + parse_cb parse; /* Callback to parse bitstream. */ + pack_cb pack; /* Callback to pack bitstream. */ + pjmedia_codec_fmtp dec_fmtp; /* Decoder's fmtp params. */ +} + +codec_desc[] = +{ +# if PJMEDIA_HAS_PASSTHROUGH_CODEC_AMR + {1, "AMR", PJMEDIA_RTP_PT_AMR, PJMEDIA_FORMAT_AMR, + 8000, 1, 160, + 7400, 12200, 2, 1, 1, + &parse_amr, &pack_amr + /*, {1, {{{"octet-align", 11}, {"1", 1}}} } */ + }, +# endif + +# if PJMEDIA_HAS_PASSTHROUGH_CODEC_G729 + {1, "G729", PJMEDIA_RTP_PT_G729, PJMEDIA_FORMAT_G729, + 8000, 1, 80, + 8000, 8000, 2, 1, 1 + }, +# endif + +# if PJMEDIA_HAS_PASSTHROUGH_CODEC_ILBC + {1, "iLBC", PJMEDIA_RTP_PT_ILBC, PJMEDIA_FORMAT_ILBC, + 8000, 1, 240, + 13333, 15200, 1, 1, 1, + NULL, NULL, + {1, {{{"mode", 4}, {"30", 2}}} } + }, +# endif + +# if PJMEDIA_HAS_PASSTHROUGH_CODEC_PCMU + {1, "PCMU", PJMEDIA_RTP_PT_PCMU, PJMEDIA_FORMAT_PCMU, + 8000, 1, 80, + 64000, 64000, 2, 1, 1 + }, +# endif + +# if PJMEDIA_HAS_PASSTHROUGH_CODEC_PCMA + {1, "PCMA", PJMEDIA_RTP_PT_PCMA, PJMEDIA_FORMAT_PCMA, + 8000, 1, 80, + 64000, 64000, 2, 1, 1 + }, +# endif +}; + + +#if PJMEDIA_HAS_PASSTHROUGH_CODEC_AMR + +#include <pjmedia-codec/amr_helper.h> + +typedef struct amr_settings_t { + pjmedia_codec_amr_pack_setting enc_setting; + pjmedia_codec_amr_pack_setting dec_setting; + pj_int8_t enc_mode; +} amr_settings_t; + + +/* Pack AMR payload */ +static pj_status_t pack_amr ( codec_private_t *codec_data, + const struct pjmedia_frame_ext *input, + unsigned output_buf_len, + struct pjmedia_frame *output) +{ + enum {MAX_FRAMES_PER_PACKET = 8}; + + pjmedia_frame frames[MAX_FRAMES_PER_PACKET]; + amr_settings_t* setting = (amr_settings_t*)codec_data->codec_setting; + pjmedia_codec_amr_pack_setting *enc_setting = &setting->enc_setting; + pj_uint8_t SID_FT; + unsigned i; + + pj_assert(input->subframe_cnt <= MAX_FRAMES_PER_PACKET); + + SID_FT = (pj_uint8_t)(enc_setting->amr_nb? 8 : 9); + + /* Get frames */ + for (i = 0; i < input->subframe_cnt; ++i) { + pjmedia_frame_ext_subframe *sf; + pjmedia_codec_amr_bit_info *info; + unsigned len; + + sf = pjmedia_frame_ext_get_subframe(input, i); + len = (sf->bitlen + 7) >> 3; + + info = (pjmedia_codec_amr_bit_info*) &frames[i].bit_info; + pj_bzero(info, sizeof(*info)); + + if (len == 0) { + info->frame_type = (pj_uint8_t)(enc_setting->amr_nb? 14 : 15); + } else { + info->frame_type = pjmedia_codec_amr_get_mode2(enc_setting->amr_nb, + len); + } + info->good_quality = 1; + info->mode = setting->enc_mode; + + frames[i].buf = sf->data; + frames[i].size = len; + } + + output->size = output_buf_len; + + return pjmedia_codec_amr_pack(frames, input->subframe_cnt, enc_setting, + output->buf, &output->size); +} + + +/* Parse AMR payload into frames. */ +static pj_status_t parse_amr(codec_private_t *codec_data, void *pkt, + pj_size_t pkt_size, const pj_timestamp *ts, + unsigned *frame_cnt, pjmedia_frame frames[]) +{ + amr_settings_t* s = (amr_settings_t*)codec_data->codec_setting; + pjmedia_codec_amr_pack_setting *setting; + pj_status_t status; + pj_uint8_t cmr; + + setting = &s->dec_setting; + + status = pjmedia_codec_amr_parse(pkt, pkt_size, ts, setting, frames, + frame_cnt, &cmr); + if (status != PJ_SUCCESS) + return status; + + // CMR is not supported for now. + /* Check Change Mode Request. */ + //if ((setting->amr_nb && cmr <= 7) || (!setting->amr_nb && cmr <= 8)) { + // s->enc_mode = cmr; + //} + + return PJ_SUCCESS; +} + +#endif /* PJMEDIA_HAS_PASSTROUGH_CODEC_AMR */ + + +/* + * Initialize and register passthrough codec factory to pjmedia endpoint. + */ +PJ_DEF(pj_status_t) pjmedia_codec_passthrough_init( pjmedia_endpt *endpt ) +{ + pjmedia_codec_mgr *codec_mgr; + pj_status_t status; + + if (codec_factory.pool != NULL) { + /* Already initialized. */ + return PJ_SUCCESS; + } + + /* Create passthrough codec factory. */ + codec_factory.base.op = &codec_factory_op; + codec_factory.base.factory_data = NULL; + codec_factory.endpt = endpt; + + codec_factory.pool = pjmedia_endpt_create_pool(endpt, "Passthrough codecs", + 4000, 4000); + if (!codec_factory.pool) + return PJ_ENOMEM; + + /* Create mutex. */ + status = pj_mutex_create_simple(codec_factory.pool, "Passthrough codecs", + &codec_factory.mutex); + if (status != PJ_SUCCESS) + goto on_error; + + /* Get the codec manager. */ + codec_mgr = pjmedia_endpt_get_codec_mgr(endpt); + if (!codec_mgr) { + status = PJ_EINVALIDOP; + goto on_error; + } + + /* Register codec factory to endpoint. */ + status = pjmedia_codec_mgr_register_factory(codec_mgr, + &codec_factory.base); + if (status != PJ_SUCCESS) + goto on_error; + + /* Done. */ + return PJ_SUCCESS; + +on_error: + pj_pool_release(codec_factory.pool); + codec_factory.pool = NULL; + return status; +} + +/* + * Unregister passthrough codecs factory from pjmedia endpoint. + */ +PJ_DEF(pj_status_t) pjmedia_codec_passthrough_deinit(void) +{ + pjmedia_codec_mgr *codec_mgr; + pj_status_t status; + + if (codec_factory.pool == NULL) { + /* Already deinitialized */ + return PJ_SUCCESS; + } + + pj_mutex_lock(codec_factory.mutex); + + /* Get the codec manager. */ + codec_mgr = pjmedia_endpt_get_codec_mgr(codec_factory.endpt); + if (!codec_mgr) { + pj_pool_release(codec_factory.pool); + codec_factory.pool = NULL; + return PJ_EINVALIDOP; + } + + /* Unregister passthrough codecs factory. */ + status = pjmedia_codec_mgr_unregister_factory(codec_mgr, + &codec_factory.base); + + /* Destroy mutex. */ + pj_mutex_destroy(codec_factory.mutex); + + /* Destroy pool. */ + pj_pool_release(codec_factory.pool); + codec_factory.pool = NULL; + + return status; +} + +/* + * Check if factory can allocate the specified codec. + */ +static pj_status_t test_alloc( pjmedia_codec_factory *factory, + const pjmedia_codec_info *info ) +{ + unsigned i; + + PJ_UNUSED_ARG(factory); + + /* Type MUST be audio. */ + if (info->type != PJMEDIA_TYPE_AUDIO) + return PJMEDIA_CODEC_EUNSUP; + + for (i = 0; i < PJ_ARRAY_SIZE(codec_desc); ++i) { + pj_str_t name = pj_str((char*)codec_desc[i].name); + if ((pj_stricmp(&info->encoding_name, &name) == 0) && + (info->clock_rate == (unsigned)codec_desc[i].clock_rate) && + (info->channel_cnt == (unsigned)codec_desc[i].channel_count) && + (codec_desc[i].enabled)) + { + return PJ_SUCCESS; + } + } + + /* Unsupported, or mode is disabled. */ + return PJMEDIA_CODEC_EUNSUP; +} + +/* + * Generate default attribute. + */ +static pj_status_t default_attr ( pjmedia_codec_factory *factory, + const pjmedia_codec_info *id, + pjmedia_codec_param *attr ) +{ + unsigned i; + + PJ_ASSERT_RETURN(factory==&codec_factory.base, PJ_EINVAL); + + pj_bzero(attr, sizeof(pjmedia_codec_param)); + + for (i = 0; i < PJ_ARRAY_SIZE(codec_desc); ++i) { + pj_str_t name = pj_str((char*)codec_desc[i].name); + if ((pj_stricmp(&id->encoding_name, &name) == 0) && + (id->clock_rate == (unsigned)codec_desc[i].clock_rate) && + (id->channel_cnt == (unsigned)codec_desc[i].channel_count) && + (id->pt == (unsigned)codec_desc[i].pt)) + { + attr->info.pt = (pj_uint8_t)id->pt; + attr->info.channel_cnt = codec_desc[i].channel_count; + attr->info.clock_rate = codec_desc[i].clock_rate; + attr->info.avg_bps = codec_desc[i].def_bitrate; + attr->info.max_bps = codec_desc[i].max_bitrate; + attr->info.pcm_bits_per_sample = 16; + attr->info.frm_ptime = (pj_uint16_t) + (codec_desc[i].samples_per_frame * 1000 / + codec_desc[i].channel_count / + codec_desc[i].clock_rate); + attr->info.fmt_id = codec_desc[i].fmt_id; + + /* Default flags. */ + attr->setting.frm_per_pkt = codec_desc[i].frm_per_pkt; + attr->setting.plc = codec_desc[i].plc; + attr->setting.penh= 0; + attr->setting.vad = codec_desc[i].vad; + attr->setting.cng = attr->setting.vad; + attr->setting.dec_fmtp = codec_desc[i].dec_fmtp; + + if (attr->setting.vad == 0) { +#if PJMEDIA_HAS_PASSTHROUGH_CODEC_G729 + if (id->pt == PJMEDIA_RTP_PT_G729) { + /* Signal G729 Annex B is being disabled */ + attr->setting.dec_fmtp.cnt = 1; + pj_strset2(&attr->setting.dec_fmtp.param[0].name, "annexb"); + pj_strset2(&attr->setting.dec_fmtp.param[0].val, "no"); + } +#endif + } + + return PJ_SUCCESS; + } + } + + return PJMEDIA_CODEC_EUNSUP; +} + +/* + * Enum codecs supported by this factory. + */ +static pj_status_t enum_codecs( pjmedia_codec_factory *factory, + unsigned *count, + pjmedia_codec_info codecs[]) +{ + unsigned max; + unsigned i; + + PJ_UNUSED_ARG(factory); + PJ_ASSERT_RETURN(codecs && *count > 0, PJ_EINVAL); + + max = *count; + + for (i = 0, *count = 0; i < PJ_ARRAY_SIZE(codec_desc) && *count < max; ++i) + { + if (!codec_desc[i].enabled) + continue; + + pj_bzero(&codecs[*count], sizeof(pjmedia_codec_info)); + codecs[*count].encoding_name = pj_str((char*)codec_desc[i].name); + codecs[*count].pt = codec_desc[i].pt; + codecs[*count].type = PJMEDIA_TYPE_AUDIO; + codecs[*count].clock_rate = codec_desc[i].clock_rate; + codecs[*count].channel_cnt = codec_desc[i].channel_count; + + ++*count; + } + + return PJ_SUCCESS; +} + +/* + * Allocate a new codec instance. + */ +static pj_status_t alloc_codec( pjmedia_codec_factory *factory, + const pjmedia_codec_info *id, + pjmedia_codec **p_codec) +{ + codec_private_t *codec_data; + pjmedia_codec *codec; + int idx; + pj_pool_t *pool; + unsigned i; + + PJ_ASSERT_RETURN(factory && id && p_codec, PJ_EINVAL); + PJ_ASSERT_RETURN(factory == &codec_factory.base, PJ_EINVAL); + + pj_mutex_lock(codec_factory.mutex); + + /* Find codec's index */ + idx = -1; + for (i = 0; i < PJ_ARRAY_SIZE(codec_desc); ++i) { + pj_str_t name = pj_str((char*)codec_desc[i].name); + if ((pj_stricmp(&id->encoding_name, &name) == 0) && + (id->clock_rate == (unsigned)codec_desc[i].clock_rate) && + (id->channel_cnt == (unsigned)codec_desc[i].channel_count) && + (codec_desc[i].enabled)) + { + idx = i; + break; + } + } + if (idx == -1) { + *p_codec = NULL; + return PJMEDIA_CODEC_EUNSUP; + } + + /* Create pool for codec instance */ + pool = pjmedia_endpt_create_pool(codec_factory.endpt, "passthroughcodec", + 512, 512); + codec = PJ_POOL_ZALLOC_T(pool, pjmedia_codec); + codec->op = &codec_op; + codec->factory = factory; + codec->codec_data = PJ_POOL_ZALLOC_T(pool, codec_private_t); + codec_data = (codec_private_t*) codec->codec_data; + codec_data->pool = pool; + codec_data->codec_idx = idx; + + pj_mutex_unlock(codec_factory.mutex); + + *p_codec = codec; + return PJ_SUCCESS; +} + +/* + * Free codec. + */ +static pj_status_t dealloc_codec( pjmedia_codec_factory *factory, + pjmedia_codec *codec ) +{ + codec_private_t *codec_data; + + PJ_ASSERT_RETURN(factory && codec, PJ_EINVAL); + PJ_ASSERT_RETURN(factory == &codec_factory.base, PJ_EINVAL); + + /* Close codec, if it's not closed. */ + codec_data = (codec_private_t*) codec->codec_data; + codec_close(codec); + + pj_pool_release(codec_data->pool); + + return PJ_SUCCESS; +} + +/* + * Init codec. + */ +static pj_status_t codec_init( pjmedia_codec *codec, + pj_pool_t *pool ) +{ + PJ_UNUSED_ARG(codec); + PJ_UNUSED_ARG(pool); + return PJ_SUCCESS; +} + +/* + * Open codec. + */ +static pj_status_t codec_open( pjmedia_codec *codec, + pjmedia_codec_param *attr ) +{ + codec_private_t *codec_data = (codec_private_t*) codec->codec_data; + struct codec_desc *desc = &codec_desc[codec_data->codec_idx]; + pj_pool_t *pool; + int i, j; + + pool = codec_data->pool; + + /* Get bitstream size */ + i = attr->info.avg_bps * desc->samples_per_frame; + j = desc->clock_rate << 3; + codec_data->avg_frame_size = (pj_uint16_t)(i / j); + if (i % j) ++codec_data->avg_frame_size; + +#if PJMEDIA_HAS_PASSTHROUGH_CODEC_AMR + /* Init AMR settings */ + if (desc->pt == PJMEDIA_RTP_PT_AMR || desc->pt == PJMEDIA_RTP_PT_AMRWB) { + amr_settings_t *s; + pj_uint8_t octet_align = 0; + const pj_str_t STR_FMTP_OCTET_ALIGN = {"octet-align", 11}; + + /* Fetch octet-align setting. It should be fine to fetch only + * the decoder, since encoder & decoder must use the same setting + * (RFC 4867 section 8.3.1). + */ + for (i = 0; i < attr->setting.dec_fmtp.cnt; ++i) { + if (pj_stricmp(&attr->setting.dec_fmtp.param[i].name, + &STR_FMTP_OCTET_ALIGN) == 0) + { + octet_align=(pj_uint8_t) + (pj_strtoul(&attr->setting.dec_fmtp.param[i].val)); + break; + } + } + + s = PJ_POOL_ZALLOC_T(pool, amr_settings_t); + codec_data->codec_setting = s; + + s->enc_mode = pjmedia_codec_amr_get_mode(desc->def_bitrate); + if (s->enc_mode < 0) + return PJMEDIA_CODEC_EINMODE; + + s->enc_setting.amr_nb = (pj_uint8_t)(desc->pt == PJMEDIA_RTP_PT_AMR); + s->enc_setting.octet_aligned = octet_align; + s->enc_setting.reorder = PJ_FALSE; /* Note this! passthrough codec + doesn't do sensitivity bits + reordering */ + s->enc_setting.cmr = 15; + + s->dec_setting.amr_nb = (pj_uint8_t)(desc->pt == PJMEDIA_RTP_PT_AMR); + s->dec_setting.octet_aligned = octet_align; + s->dec_setting.reorder = PJ_FALSE; /* Note this! passthrough codec + doesn't do sensitivity bits + reordering */ + } +#endif + + return PJ_SUCCESS; +} + +/* + * Close codec. + */ +static pj_status_t codec_close( pjmedia_codec *codec ) +{ + PJ_UNUSED_ARG(codec); + + return PJ_SUCCESS; +} + + +/* + * Modify codec settings. + */ +static pj_status_t codec_modify( pjmedia_codec *codec, + const pjmedia_codec_param *attr ) +{ + /* Not supported yet. */ + PJ_UNUSED_ARG(codec); + PJ_UNUSED_ARG(attr); + + return PJ_ENOTSUP; +} + +/* + * Get frames in the packet. + */ +static pj_status_t codec_parse( pjmedia_codec *codec, + void *pkt, + pj_size_t pkt_size, + const pj_timestamp *ts, + unsigned *frame_cnt, + pjmedia_frame frames[]) +{ + codec_private_t *codec_data = (codec_private_t*) codec->codec_data; + struct codec_desc *desc = &codec_desc[codec_data->codec_idx]; + unsigned count = 0; + + PJ_ASSERT_RETURN(frame_cnt, PJ_EINVAL); + + if (desc->parse != NULL) { + return desc->parse(codec_data, pkt, pkt_size, ts, frame_cnt, frames); + } + + while (pkt_size >= codec_data->avg_frame_size && count < *frame_cnt) { + frames[count].type = PJMEDIA_FRAME_TYPE_AUDIO; + frames[count].buf = pkt; + frames[count].size = codec_data->avg_frame_size; + frames[count].timestamp.u64 = ts->u64 + count*desc->samples_per_frame; + + pkt = (pj_uint8_t*)pkt + codec_data->avg_frame_size; + pkt_size -= codec_data->avg_frame_size; + + ++count; + } + + if (pkt_size && count < *frame_cnt) { + frames[count].type = PJMEDIA_FRAME_TYPE_AUDIO; + frames[count].buf = pkt; + frames[count].size = pkt_size; + frames[count].timestamp.u64 = ts->u64 + count*desc->samples_per_frame; + ++count; + } + + *frame_cnt = count; + return PJ_SUCCESS; +} + +/* + * Encode frames. + */ +static pj_status_t codec_encode( pjmedia_codec *codec, + const struct pjmedia_frame *input, + unsigned output_buf_len, + struct pjmedia_frame *output) +{ + codec_private_t *codec_data = (codec_private_t*) codec->codec_data; + struct codec_desc *desc = &codec_desc[codec_data->codec_idx]; + const pjmedia_frame_ext *input_ = (const pjmedia_frame_ext*) input; + + pj_assert(input && input->type == PJMEDIA_FRAME_TYPE_EXTENDED); + + if (desc->pack != NULL) { + desc->pack(codec_data, input_, output_buf_len, output); + } else { + if (input_->subframe_cnt == 0) { + /* DTX */ + output->buf = NULL; + output->size = 0; + output->type = PJMEDIA_FRAME_TYPE_NONE; + } else { + unsigned i; + pj_uint8_t *p = output->buf; + + output->type = PJMEDIA_FRAME_TYPE_AUDIO; + output->size = 0; + + for (i = 0; i < input_->subframe_cnt; ++i) { + pjmedia_frame_ext_subframe *sf; + unsigned sf_len; + + sf = pjmedia_frame_ext_get_subframe(input_, i); + pj_assert(sf); + + sf_len = (sf->bitlen + 7) >> 3; + + pj_memcpy(p, sf->data, sf_len); + p += sf_len; + output->size += sf_len; + + /* If there is SID or DTX frame, break the loop. */ + if (desc->pt == PJMEDIA_RTP_PT_G729 && + sf_len < codec_data->avg_frame_size) + { + break; + } + + } + } + } + + return PJ_SUCCESS; +} + +/* + * Decode frame. + */ +static pj_status_t codec_decode( pjmedia_codec *codec, + const struct pjmedia_frame *input, + unsigned output_buf_len, + struct pjmedia_frame *output) +{ + codec_private_t *codec_data = (codec_private_t*) codec->codec_data; + struct codec_desc *desc = &codec_desc[codec_data->codec_idx]; + pjmedia_frame_ext *output_ = (pjmedia_frame_ext*) output; + + pj_assert(input); + PJ_UNUSED_ARG(output_buf_len); + +#if PJMEDIA_HAS_PASSTHROUGH_CODEC_AMR + /* Need to rearrange the AMR bitstream, since the bitstream may not be + * started from bit 0 or may need to be reordered from sensitivity order + * into encoder bits order. + */ + if (desc->pt == PJMEDIA_RTP_PT_AMR || desc->pt == PJMEDIA_RTP_PT_AMRWB) { + pjmedia_frame input_; + pjmedia_codec_amr_pack_setting *setting; + + setting = &((amr_settings_t*)codec_data->codec_setting)->dec_setting; + + input_ = *input; + pjmedia_codec_amr_predecode(input, setting, &input_); + + pjmedia_frame_ext_append_subframe(output_, input_.buf, + (pj_uint16_t)(input_.size << 3), + (pj_uint16_t)desc->samples_per_frame); + + return PJ_SUCCESS; + } +#endif + + pjmedia_frame_ext_append_subframe(output_, input->buf, + (pj_uint16_t)(input->size << 3), + (pj_uint16_t)desc->samples_per_frame); + + return PJ_SUCCESS; +} + +/* + * Recover lost frame. + */ +static pj_status_t codec_recover( pjmedia_codec *codec, + unsigned output_buf_len, + struct pjmedia_frame *output) +{ + codec_private_t *codec_data = (codec_private_t*) codec->codec_data; + struct codec_desc *desc = &codec_desc[codec_data->codec_idx]; + pjmedia_frame_ext *output_ = (pjmedia_frame_ext*) output; + + PJ_UNUSED_ARG(output_buf_len); + + pjmedia_frame_ext_append_subframe(output_, NULL, 0, + (pj_uint16_t)desc->samples_per_frame); + + return PJ_SUCCESS; +} + +#endif /* PJMEDIA_HAS_PASSTHROUGH_CODECS */ + |