| /* $Id$ */ |
| /* |
| * Copyright (C)2003-2006 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/speex.h> |
| #include <pjmedia/codec.h> |
| #include <pjmedia/errno.h> |
| #include <pjmedia/endpoint.h> |
| #include <pjmedia/port.h> |
| #include <speex/speex.h> |
| #include <pj/assert.h> |
| #include <pj/pool.h> |
| #include <pj/string.h> |
| #include <pj/os.h> |
| |
| #define DEFAULT_QUALITY 8 |
| #define DEFAULT_COMPLEXITY 8 |
| |
| |
| /* Prototypes for Speex factory */ |
| static pj_status_t spx_test_alloc( pjmedia_codec_factory *factory, |
| const pjmedia_codec_info *id ); |
| static pj_status_t spx_default_attr( pjmedia_codec_factory *factory, |
| const pjmedia_codec_info *id, |
| pjmedia_codec_param *attr ); |
| static pj_status_t spx_enum_codecs( pjmedia_codec_factory *factory, |
| unsigned *count, |
| pjmedia_codec_info codecs[]); |
| static pj_status_t spx_alloc_codec( pjmedia_codec_factory *factory, |
| const pjmedia_codec_info *id, |
| pjmedia_codec **p_codec); |
| static pj_status_t spx_dealloc_codec( pjmedia_codec_factory *factory, |
| pjmedia_codec *codec ); |
| |
| /* Prototypes for Speex implementation. */ |
| static pj_status_t spx_codec_default_attr(pjmedia_codec *codec, |
| pjmedia_codec_param *attr); |
| static pj_status_t spx_codec_init( pjmedia_codec *codec, |
| pj_pool_t *pool ); |
| static pj_status_t spx_codec_open( pjmedia_codec *codec, |
| pjmedia_codec_param *attr ); |
| static pj_status_t spx_codec_close( pjmedia_codec *codec ); |
| static pj_status_t spx_codec_get_frames( pjmedia_codec *codec, |
| void *pkt, |
| pj_size_t pkt_size, |
| unsigned *frame_cnt, |
| pjmedia_frame frames[]); |
| static pj_status_t spx_codec_encode( pjmedia_codec *codec, |
| const struct pjmedia_frame *input, |
| unsigned output_buf_len, |
| struct pjmedia_frame *output); |
| static pj_status_t spx_codec_decode( pjmedia_codec *codec, |
| const struct pjmedia_frame *input, |
| unsigned output_buf_len, |
| struct pjmedia_frame *output); |
| |
| /* Definition for Speex codec operations. */ |
| static pjmedia_codec_op spx_op = |
| { |
| &spx_codec_default_attr, |
| &spx_codec_init, |
| &spx_codec_open, |
| &spx_codec_close, |
| &spx_codec_get_frames, |
| &spx_codec_encode, |
| &spx_codec_decode |
| }; |
| |
| /* Definition for Speex codec factory operations. */ |
| static pjmedia_codec_factory_op spx_factory_op = |
| { |
| &spx_test_alloc, |
| &spx_default_attr, |
| &spx_enum_codecs, |
| &spx_alloc_codec, |
| &spx_dealloc_codec |
| }; |
| |
| /* Index to Speex parameter. */ |
| enum |
| { |
| PARAM_NB, /* Index for narrowband parameter. */ |
| PARAM_WB, /* Index for wideband parameter. */ |
| PARAM_UWB, /* Index for ultra-wideband parameter */ |
| }; |
| |
| /* Speex default parameter */ |
| struct speex_param |
| { |
| int enabled; /* Is this mode enabled? */ |
| const SpeexMode *mode; /* Speex mode. */ |
| int pt; /* Payload type. */ |
| unsigned clock_rate;/* Default sampling rate to be used. */ |
| int quality; /* Default encoder quality to be used. */ |
| int complexity; /* Default encoder complexity. */ |
| int samples_per_frame; /* Samples per frame. */ |
| int framesize; /* Frame size for current mode. */ |
| int bitrate; /* Bit rate for current mode. */ |
| }; |
| |
| /* Speex factory */ |
| static struct spx_factory |
| { |
| pjmedia_codec_factory base; |
| pjmedia_endpt *endpt; |
| pj_pool_t *pool; |
| pj_mutex_t *mutex; |
| pjmedia_codec codec_list; |
| struct speex_param speex_param[3]; |
| |
| } spx_factory; |
| |
| /* Speex codec private data. */ |
| struct spx_private |
| { |
| //pjmedia_codec_info info; /**< Codec info. */ |
| |
| int param_id; /**< Index to speex param. */ |
| |
| void *enc; /**< Encoder state. */ |
| SpeexBits enc_bits; /**< Encoder bits. */ |
| void *dec; /**< Decoder state. */ |
| SpeexBits dec_bits; /**< Decoder bits. */ |
| }; |
| |
| |
| /* |
| * Get codec bitrate and frame size. |
| */ |
| static pj_status_t get_speex_info( struct speex_param *p ) |
| { |
| void *state; |
| int tmp; |
| |
| /* Create temporary encoder */ |
| state = speex_encoder_init(p->mode); |
| if (!state) |
| return PJMEDIA_CODEC_EFAILED; |
| |
| /* Set the quality */ |
| speex_encoder_ctl(state, SPEEX_SET_QUALITY, &p->quality); |
| |
| /* Sampling rate. */ |
| speex_encoder_ctl(state, SPEEX_SET_SAMPLING_RATE, &p->clock_rate); |
| |
| /* VAD */ |
| tmp = 1; |
| speex_encoder_ctl(state, SPEEX_SET_VAD, &tmp); |
| |
| /* Complexity. */ |
| speex_encoder_ctl(state, SPEEX_SET_COMPLEXITY, &p->complexity); |
| |
| /* Now get the frame size */ |
| speex_encoder_ctl(state, SPEEX_GET_FRAME_SIZE, &p->samples_per_frame); |
| |
| /* Now get the the averate bitrate */ |
| speex_encoder_ctl(state, SPEEX_GET_BITRATE, &p->bitrate); |
| |
| /* Calculate framesize. */ |
| p->framesize = p->bitrate * 20 / 1000; |
| |
| /* Destroy encoder. */ |
| speex_encoder_destroy(state); |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Initialize and register Speex codec factory to pjmedia endpoint. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_codec_speex_init( pjmedia_endpt *endpt, |
| unsigned options, |
| int quality, |
| int complexity ) |
| { |
| pjmedia_codec_mgr *codec_mgr; |
| unsigned i; |
| pj_status_t status; |
| |
| if (spx_factory.pool != NULL) { |
| /* Already initialized. */ |
| return PJ_SUCCESS; |
| } |
| |
| /* Get defaults */ |
| if (quality < 0) quality = DEFAULT_QUALITY; |
| if (complexity < 0) complexity = DEFAULT_COMPLEXITY; |
| |
| /* Create Speex codec factory. */ |
| spx_factory.base.op = &spx_factory_op; |
| spx_factory.base.factory_data = NULL; |
| spx_factory.endpt = endpt; |
| |
| spx_factory.pool = pjmedia_endpt_create_pool(endpt, "speex", |
| 4000, 4000); |
| if (!spx_factory.pool) |
| return PJ_ENOMEM; |
| |
| pj_list_init(&spx_factory.codec_list); |
| |
| /* Create mutex. */ |
| status = pj_mutex_create_simple(spx_factory.pool, "speex", |
| &spx_factory.mutex); |
| if (status != PJ_SUCCESS) |
| goto on_error; |
| |
| /* Initialize default Speex parameter. */ |
| spx_factory.speex_param[PARAM_NB].enabled = |
| ((options & PJMEDIA_SPEEX_NO_NB) == 0); |
| spx_factory.speex_param[PARAM_NB].pt = 102; |
| spx_factory.speex_param[PARAM_NB].mode = &speex_nb_mode; |
| spx_factory.speex_param[PARAM_NB].clock_rate = 8000; |
| spx_factory.speex_param[PARAM_NB].quality = quality; |
| spx_factory.speex_param[PARAM_NB].complexity = complexity; |
| |
| spx_factory.speex_param[PARAM_WB].enabled = |
| ((options & PJMEDIA_SPEEX_NO_WB) == 0); |
| spx_factory.speex_param[PARAM_WB].pt = 103; |
| spx_factory.speex_param[PARAM_WB].mode = &speex_wb_mode; |
| spx_factory.speex_param[PARAM_WB].clock_rate = 16000; |
| spx_factory.speex_param[PARAM_WB].quality = quality; |
| spx_factory.speex_param[PARAM_WB].complexity = complexity; |
| |
| spx_factory.speex_param[PARAM_UWB].enabled = |
| ((options & PJMEDIA_SPEEX_NO_UWB) == 0); |
| spx_factory.speex_param[PARAM_UWB].pt = 104; |
| spx_factory.speex_param[PARAM_UWB].mode = &speex_uwb_mode; |
| spx_factory.speex_param[PARAM_UWB].clock_rate = 32000; |
| spx_factory.speex_param[PARAM_UWB].quality = quality; |
| spx_factory.speex_param[PARAM_UWB].complexity = complexity; |
| |
| /* Get codec framesize and avg bitrate for each mode. */ |
| for (i=0; i<PJ_ARRAY_SIZE(spx_factory.speex_param); ++i) { |
| status = get_speex_info(&spx_factory.speex_param[i]); |
| } |
| |
| /* 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, |
| &spx_factory.base); |
| if (status != PJ_SUCCESS) |
| goto on_error; |
| |
| /* Done. */ |
| return PJ_SUCCESS; |
| |
| on_error: |
| pj_pool_release(spx_factory.pool); |
| spx_factory.pool = NULL; |
| return status; |
| } |
| |
| |
| /* |
| * Initialize with default settings. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_codec_speex_init_default(pjmedia_endpt *endpt) |
| { |
| return pjmedia_codec_speex_init(endpt, 0, -1, -1); |
| } |
| |
| /* |
| * Unregister Speex codec factory from pjmedia endpoint and deinitialize |
| * the Speex codec library. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_codec_speex_deinit(void) |
| { |
| pjmedia_codec_mgr *codec_mgr; |
| pj_status_t status; |
| |
| if (spx_factory.pool == NULL) { |
| /* Already deinitialized */ |
| return PJ_SUCCESS; |
| } |
| |
| /* We don't want to deinit if there's outstanding codec. */ |
| pj_mutex_lock(spx_factory.mutex); |
| if (!pj_list_empty(&spx_factory.codec_list)) { |
| pj_mutex_unlock(spx_factory.mutex); |
| return PJ_EBUSY; |
| } |
| |
| /* Get the codec manager. */ |
| codec_mgr = pjmedia_endpt_get_codec_mgr(spx_factory.endpt); |
| if (!codec_mgr) { |
| pj_pool_release(spx_factory.pool); |
| spx_factory.pool = NULL; |
| return PJ_EINVALIDOP; |
| } |
| |
| /* Unregister Speex codec factory. */ |
| status = pjmedia_codec_mgr_unregister_factory(codec_mgr, |
| &spx_factory.base); |
| |
| /* Destroy mutex. */ |
| pj_mutex_destroy(spx_factory.mutex); |
| |
| /* Destroy pool. */ |
| pj_pool_release(spx_factory.pool); |
| spx_factory.pool = NULL; |
| |
| return status; |
| } |
| |
| /* |
| * Check if factory can allocate the specified codec. |
| */ |
| static pj_status_t spx_test_alloc( pjmedia_codec_factory *factory, |
| const pjmedia_codec_info *info ) |
| { |
| const pj_str_t speex_tag = { "speex", 5}; |
| unsigned i; |
| |
| PJ_UNUSED_ARG(factory); |
| |
| /* Type MUST be audio. */ |
| if (info->type != PJMEDIA_TYPE_AUDIO) |
| return PJMEDIA_CODEC_EUNSUP; |
| |
| /* Check encoding name. */ |
| if (pj_stricmp(&info->encoding_name, &speex_tag) != 0) |
| return PJMEDIA_CODEC_EUNSUP; |
| |
| /* Check clock-rate */ |
| for (i=0; i<PJ_ARRAY_SIZE(spx_factory.speex_param); ++i) { |
| if (info->sample_rate == spx_factory.speex_param[i].clock_rate) { |
| /* Okay, let's Speex! */ |
| return PJ_SUCCESS; |
| } |
| } |
| |
| |
| /* Unsupported, or mode is disabled. */ |
| return PJMEDIA_CODEC_EUNSUP; |
| } |
| |
| /* |
| * Generate default attribute. |
| */ |
| static pj_status_t spx_default_attr (pjmedia_codec_factory *factory, |
| const pjmedia_codec_info *id, |
| pjmedia_codec_param *attr ) |
| { |
| |
| PJ_ASSERT_RETURN(factory==&spx_factory.base, PJ_EINVAL); |
| |
| pj_memset(attr, 0, sizeof(pjmedia_codec_param)); |
| attr->pt = id->pt; |
| |
| if (id->sample_rate <= 8000) { |
| attr->sample_rate = spx_factory.speex_param[PARAM_NB].clock_rate; |
| attr->avg_bps = spx_factory.speex_param[PARAM_NB].bitrate; |
| |
| } else if (id->sample_rate <= 16000) { |
| attr->sample_rate = spx_factory.speex_param[PARAM_WB].clock_rate; |
| attr->avg_bps = spx_factory.speex_param[PARAM_WB].bitrate; |
| |
| } else { |
| /* Wow.. somebody is doing ultra-wideband. Cool...! */ |
| attr->sample_rate = spx_factory.speex_param[PARAM_UWB].clock_rate; |
| attr->avg_bps = spx_factory.speex_param[PARAM_UWB].bitrate; |
| } |
| |
| attr->pcm_bits_per_sample = 16; |
| attr->ptime = 20; |
| attr->pt = id->pt; |
| |
| /* Default flags. */ |
| attr->cng_enabled = 1; |
| attr->concl_enabled = 1; |
| attr->hpf_enabled = 1; |
| attr->lpf_enabled =1 ; |
| attr->penh_enabled =1 ; |
| attr->vad_enabled = 1; |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Enum codecs supported by this factory (i.e. only Speex!). |
| */ |
| static pj_status_t spx_enum_codecs(pjmedia_codec_factory *factory, |
| unsigned *count, |
| pjmedia_codec_info codecs[]) |
| { |
| unsigned max; |
| int i; /* Must be signed */ |
| |
| PJ_UNUSED_ARG(factory); |
| PJ_ASSERT_RETURN(codecs && *count > 0, PJ_EINVAL); |
| |
| max = *count; |
| *count = 0; |
| |
| /* |
| * We return three codecs here, and in this order: |
| * - ultra-wideband, wideband, and narrowband. |
| */ |
| for (i=PJ_ARRAY_SIZE(spx_factory.speex_param)-1; i>=0 && *count<max; --i) { |
| |
| if (!spx_factory.speex_param[i].enabled) |
| continue; |
| |
| pj_memset(&codecs[*count], 0, sizeof(pjmedia_codec_info)); |
| codecs[*count].encoding_name = pj_str("speex"); |
| codecs[*count].pt = spx_factory.speex_param[i].pt; |
| codecs[*count].type = PJMEDIA_TYPE_AUDIO; |
| codecs[*count].sample_rate = spx_factory.speex_param[i].clock_rate; |
| |
| ++*count; |
| } |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Allocate a new Speex codec instance. |
| */ |
| static pj_status_t spx_alloc_codec( pjmedia_codec_factory *factory, |
| const pjmedia_codec_info *id, |
| pjmedia_codec **p_codec) |
| { |
| pjmedia_codec *codec; |
| struct spx_private *spx; |
| |
| PJ_ASSERT_RETURN(factory && id && p_codec, PJ_EINVAL); |
| PJ_ASSERT_RETURN(factory == &spx_factory.base, PJ_EINVAL); |
| |
| |
| pj_mutex_lock(spx_factory.mutex); |
| |
| /* Get free nodes, if any. */ |
| if (!pj_list_empty(&spx_factory.codec_list)) { |
| codec = spx_factory.codec_list.next; |
| pj_list_erase(codec); |
| } else { |
| codec = pj_pool_zalloc(spx_factory.pool, |
| sizeof(pjmedia_codec)); |
| PJ_ASSERT_RETURN(codec != NULL, PJ_ENOMEM); |
| codec->op = &spx_op; |
| codec->factory = factory; |
| codec->codec_data = pj_pool_alloc(spx_factory.pool, |
| sizeof(struct spx_private)); |
| } |
| |
| pj_mutex_unlock(spx_factory.mutex); |
| |
| spx = (struct spx_private*) codec->codec_data; |
| spx->enc = NULL; |
| spx->dec = NULL; |
| |
| if (id->sample_rate <= 8000) |
| spx->param_id = PARAM_NB; |
| else if (id->sample_rate <= 16000) |
| spx->param_id = PARAM_WB; |
| else |
| spx->param_id = PARAM_UWB; |
| |
| *p_codec = codec; |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Free codec. |
| */ |
| static pj_status_t spx_dealloc_codec( pjmedia_codec_factory *factory, |
| pjmedia_codec *codec ) |
| { |
| struct spx_private *spx; |
| |
| PJ_ASSERT_RETURN(factory && codec, PJ_EINVAL); |
| PJ_ASSERT_RETURN(factory == &spx_factory.base, PJ_EINVAL); |
| |
| /* Close codec, if it's not closed. */ |
| spx = (struct spx_private*) codec->codec_data; |
| if (spx->enc != NULL || spx->dec != NULL) { |
| spx_codec_close(codec); |
| } |
| |
| /* Put in the free list. */ |
| pj_mutex_lock(spx_factory.mutex); |
| pj_list_push_front(&spx_factory.codec_list, codec); |
| pj_mutex_unlock(spx_factory.mutex); |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Get codec default attributes. |
| */ |
| static pj_status_t spx_codec_default_attr( pjmedia_codec *codec, |
| pjmedia_codec_param *attr) |
| { |
| struct spx_private *spx; |
| pjmedia_codec_info info; |
| |
| spx = (struct spx_private*) codec->codec_data; |
| |
| info.encoding_name = pj_str("speex"); |
| info.pt = 200; /* Don't care */ |
| info.sample_rate = spx_factory.speex_param[spx->param_id].clock_rate; |
| info.type = PJMEDIA_TYPE_AUDIO; |
| |
| return spx_default_attr( codec->factory, &info, attr); |
| } |
| |
| /* |
| * Init codec. |
| */ |
| static pj_status_t spx_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 spx_codec_open( pjmedia_codec *codec, |
| pjmedia_codec_param *attr ) |
| { |
| struct spx_private *spx; |
| int id, tmp; |
| |
| spx = (struct spx_private*) codec->codec_data; |
| id = spx->param_id; |
| |
| /* |
| * Create and initialize encoder. |
| */ |
| spx->enc = speex_encoder_init(spx_factory.speex_param[id].mode); |
| if (!spx->enc) |
| return PJMEDIA_CODEC_EFAILED; |
| speex_bits_init(&spx->enc_bits); |
| |
| /* Set the quality*/ |
| speex_encoder_ctl(spx->enc, SPEEX_SET_QUALITY, |
| &spx_factory.speex_param[id].quality); |
| |
| /* Sampling rate. */ |
| tmp = attr->sample_rate; |
| speex_encoder_ctl(spx->enc, SPEEX_SET_SAMPLING_RATE, |
| &spx_factory.speex_param[id].clock_rate); |
| |
| /* VAD */ |
| tmp = attr->vad_enabled; |
| speex_encoder_ctl(spx->enc, SPEEX_SET_VAD, &tmp); |
| |
| /* Complexity */ |
| speex_encoder_ctl(spx->enc, SPEEX_SET_BITRATE, |
| &spx_factory.speex_param[id].complexity); |
| |
| /* Bitrate */ |
| speex_encoder_ctl(spx->enc, SPEEX_SET_BITRATE, |
| &spx_factory.speex_param[id].bitrate); |
| |
| /* |
| * Create and initialize decoder. |
| */ |
| spx->dec = speex_decoder_init(spx_factory.speex_param[id].mode); |
| if (!spx->dec) { |
| spx_codec_close(codec); |
| return PJMEDIA_CODEC_EFAILED; |
| } |
| speex_bits_init(&spx->dec_bits); |
| |
| /* Sampling rate. */ |
| speex_decoder_ctl(spx->dec, SPEEX_SET_SAMPLING_RATE, |
| &spx_factory.speex_param[id].clock_rate); |
| |
| /* PENH */ |
| tmp = attr->penh_enabled; |
| speex_decoder_ctl(spx->dec, SPEEX_SET_ENH, &tmp); |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Close codec. |
| */ |
| static pj_status_t spx_codec_close( pjmedia_codec *codec ) |
| { |
| struct spx_private *spx; |
| |
| spx = (struct spx_private*) codec->codec_data; |
| |
| /* Destroy encoder*/ |
| if (spx->enc) { |
| speex_encoder_destroy( spx->enc ); |
| spx->enc = NULL; |
| speex_bits_destroy( &spx->enc_bits ); |
| } |
| |
| /* Destroy decoder */ |
| if (spx->dec) { |
| speex_decoder_destroy( spx->dec); |
| spx->dec = NULL; |
| speex_bits_destroy( &spx->dec_bits ); |
| } |
| |
| return PJ_SUCCESS; |
| } |
| |
| |
| /* |
| * Get frames in the packet. |
| */ |
| static pj_status_t spx_codec_get_frames( pjmedia_codec *codec, |
| void *pkt, |
| pj_size_t pkt_size, |
| unsigned *frame_cnt, |
| pjmedia_frame frames[]) |
| { |
| struct spx_private *spx; |
| unsigned speex_frame_size; |
| unsigned count; |
| |
| spx = (struct spx_private*) codec->codec_data; |
| |
| speex_frame_size = spx_factory.speex_param[spx->param_id].framesize; |
| |
| /* Don't really know how to do this... */ |
| count = 0; |
| while (pkt_size >= speex_frame_size && count < *frame_cnt) { |
| frames[count].buf = pkt; |
| frames[count].size = speex_frame_size; |
| frames[count].type = PJMEDIA_FRAME_TYPE_AUDIO; |
| frames[count].timestamp.u64 = 0; |
| |
| pkt_size -= speex_frame_size; |
| ++count; |
| pkt = ((char*)pkt) + speex_frame_size; |
| } |
| |
| if (pkt_size && count < *frame_cnt) { |
| frames[count].buf = pkt; |
| frames[count].size = pkt_size; |
| frames[count].type = PJMEDIA_FRAME_TYPE_AUDIO; |
| frames[count].timestamp.u64 = 0; |
| ++count; |
| } |
| |
| *frame_cnt = count; |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Encode frame. |
| */ |
| static pj_status_t spx_codec_encode( pjmedia_codec *codec, |
| const struct pjmedia_frame *input, |
| unsigned output_buf_len, |
| struct pjmedia_frame *output) |
| { |
| struct spx_private *spx; |
| float tmp[640]; /* 20ms at 32KHz */ |
| pj_int16_t *samp_in; |
| unsigned i, samp_count; |
| |
| spx = (struct spx_private*) codec->codec_data; |
| |
| if (input->type != PJMEDIA_FRAME_TYPE_AUDIO) { |
| output->size = 0; |
| output->buf = NULL; |
| output->timestamp = input->timestamp; |
| output->type = input->type; |
| return PJ_SUCCESS; |
| } |
| |
| /* Copy frame to float buffer. */ |
| samp_count = input->size / 2; |
| samp_in = input->buf; |
| for (i=0; i<samp_count; ++i) { |
| tmp[i] = samp_in[i]; |
| } |
| |
| /* Flush all the bits in the struct so we can encode a new frame */ |
| speex_bits_reset(&spx->enc_bits); |
| |
| /* Encode the frame */ |
| speex_encode(spx->enc, tmp, &spx->enc_bits); |
| |
| /* Copy the bits to an array of char that can be written */ |
| output->size = speex_bits_write(&spx->enc_bits, |
| output->buf, output_buf_len); |
| output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| output->timestamp = input->timestamp; |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* |
| * Decode frame. |
| */ |
| static pj_status_t spx_codec_decode( pjmedia_codec *codec, |
| const struct pjmedia_frame *input, |
| unsigned output_buf_len, |
| struct pjmedia_frame *output) |
| { |
| struct spx_private *spx; |
| float tmp[640]; /* 20ms at 32KHz */ |
| pj_int16_t *dst_buf; |
| unsigned i, count; |
| |
| spx = (struct spx_private*) codec->codec_data; |
| |
| if (input->type != PJMEDIA_FRAME_TYPE_AUDIO) { |
| pj_memset(output->buf, 0, output_buf_len); |
| output->size = 320; |
| output->timestamp.u64 = input->timestamp.u64; |
| output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| return PJ_SUCCESS; |
| } |
| |
| /* Initialization of the structure that holds the bits */ |
| speex_bits_init(&spx->dec_bits); |
| |
| /* Copy the data into the bit-stream struct */ |
| speex_bits_read_from(&spx->dec_bits, input->buf, input->size); |
| |
| /* Decode the data */ |
| speex_decode(spx->dec, &spx->dec_bits, tmp); |
| |
| count = spx_factory.speex_param[spx->param_id].clock_rate * 20 / 1000; |
| dst_buf = output->buf; |
| for (i=0; i<count; ++i) { |
| dst_buf[i] = (pj_int16_t)tmp[i]; |
| } |
| output->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| output->size = count * 2; |
| output->timestamp.u64 = input->timestamp.u64; |
| |
| |
| return PJ_SUCCESS; |
| } |