| /* $Id$ */ |
| /* |
| * Copyright (C) 2008-2011 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/resample.h> |
| #include <pjmedia/errno.h> |
| #include <pj/assert.h> |
| #include <pj/log.h> |
| #include <pj/pool.h> |
| |
| #if PJMEDIA_RESAMPLE_IMP==PJMEDIA_RESAMPLE_SPEEX |
| |
| #include <speex/speex_resampler.h> |
| |
| #define THIS_FILE "resample_speex.c" |
| |
| |
| struct pjmedia_resample |
| { |
| SpeexResamplerState *state; |
| unsigned in_samples_per_frame; |
| unsigned out_samples_per_frame; |
| }; |
| |
| |
| PJ_DEF(pj_status_t) pjmedia_resample_create( pj_pool_t *pool, |
| pj_bool_t high_quality, |
| pj_bool_t large_filter, |
| unsigned channel_count, |
| unsigned rate_in, |
| unsigned rate_out, |
| unsigned samples_per_frame, |
| pjmedia_resample **p_resample) |
| { |
| pjmedia_resample *resample; |
| int quality; |
| int err; |
| |
| PJ_ASSERT_RETURN(pool && p_resample && rate_in && |
| rate_out && samples_per_frame, PJ_EINVAL); |
| |
| resample = PJ_POOL_ZALLOC_T(pool, pjmedia_resample); |
| PJ_ASSERT_RETURN(resample, PJ_ENOMEM); |
| |
| if (high_quality) { |
| if (large_filter) |
| quality = 10; |
| else |
| quality = 7; |
| } else { |
| quality = 3; |
| } |
| |
| resample->in_samples_per_frame = samples_per_frame; |
| resample->out_samples_per_frame = rate_out / (rate_in / samples_per_frame); |
| resample->state = speex_resampler_init(channel_count, rate_in, rate_out, |
| quality, &err); |
| if (resample->state == NULL || err != RESAMPLER_ERR_SUCCESS) |
| return PJ_ENOMEM; |
| |
| |
| *p_resample = resample; |
| |
| PJ_LOG(5,(THIS_FILE, |
| "resample created: quality=%d, ch=%d, in/out rate=%d/%d", |
| quality, channel_count, rate_in, rate_out)); |
| return PJ_SUCCESS; |
| } |
| |
| |
| PJ_DEF(void) pjmedia_resample_run( pjmedia_resample *resample, |
| const pj_int16_t *input, |
| pj_int16_t *output ) |
| { |
| spx_uint32_t in_length, out_length; |
| |
| PJ_ASSERT_ON_FAIL(resample, return); |
| |
| in_length = resample->in_samples_per_frame; |
| out_length = resample->out_samples_per_frame; |
| |
| speex_resampler_process_interleaved_int(resample->state, |
| (const __int16 *)input, &in_length, |
| (__int16 *)output, &out_length); |
| |
| pj_assert(in_length == resample->in_samples_per_frame); |
| pj_assert(out_length == resample->out_samples_per_frame); |
| } |
| |
| |
| PJ_DEF(unsigned) pjmedia_resample_get_input_size(pjmedia_resample *resample) |
| { |
| PJ_ASSERT_RETURN(resample != NULL, 0); |
| return resample->in_samples_per_frame; |
| } |
| |
| |
| PJ_DEF(void) pjmedia_resample_destroy(pjmedia_resample *resample) |
| { |
| PJ_ASSERT_ON_FAIL(resample, return); |
| if (resample->state) { |
| speex_resampler_destroy(resample->state); |
| resample->state = NULL; |
| } |
| } |
| |
| #else /* PJMEDIA_RESAMPLE_IMP==PJMEDIA_RESAMPLE_SPEEX */ |
| |
| int pjmedia_resample_speex_excluded; |
| |
| #endif /* PJMEDIA_RESAMPLE_IMP==PJMEDIA_RESAMPLE_SPEEX */ |
| |