266 lines
7.2 KiB
C
266 lines
7.2 KiB
C
/* $Id$ */
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/*
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* Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
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* Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <pjmedia.h>
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#include <pjlib-util.h>
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#include <pjlib.h>
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#include <stdio.h>
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#include <stdlib.h>
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#define app_perror(a,b,c) printf("%s: %s (%d)", a, b, c)
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/* For logging purpose. */
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#define THIS_FILE "cmp_wav.c"
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#define BYTES_PER_FRAME 512
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static const char *desc =
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" FILE \n"
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" \n"
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" cmp_wav.c \n"
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" \n"
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" PURPOSE \n"
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" \n"
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" Compare two WAV files. \n"
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" \n"
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" USAGE \n"
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" \n"
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" cmp_wav ORIGINAL_WAV DEGRADED_WAV [TIME] [DETAIL] \n"
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" \n"
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" ORIGINAL_WAV The original WAV file as reference. \n"
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" DEGRADED_WAV The degraded WAV file. \n"
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" TIME Compare only some part of the files \n"
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" (in ms, since the beginning). \n"
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" Specify 0 (default) to compare the whole time. \n"
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" DETAIL Show detail result, 1 or 0 (default=0, means no)\n"
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" \n"
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" Both files must have same clock rate and must contain \n"
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" uncompressed (i.e. 16bit) PCM. \n";
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/* Sum of multiplication of corresponding samples in buf1 & buf2 */
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double sum_mult_sig(pj_int16_t *buf1, pj_int16_t *buf2, unsigned nsamples)
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{
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double mag = 0;
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while (nsamples--)
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mag += (double)*buf1++ * (double)*buf2++;
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return mag;
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}
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/*
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* main()
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*/
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int main(int argc, char *argv[])
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{
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pj_caching_pool cp;
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pjmedia_endpt *med_endpt;
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pj_pool_t *pool;
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pjmedia_port *file_ori_port;
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pjmedia_port *file_deg_port;
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pj_status_t status;
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unsigned first_nsamples = 0;
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unsigned samples_compared = 0;
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char buf1[BYTES_PER_FRAME];
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char buf2[BYTES_PER_FRAME];
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double ref_mag = 0;
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double deg_mag = 0;
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double mix_mag = 0;
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int detail = 0;
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int res_deg, res_mix, res_overall;
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if (argc < 3) {
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puts("Error: original & degraded filename required");
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puts(desc);
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return 1;
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}
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/* Set log level. */
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pj_log_set_level(3);
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/* Must init PJLIB first: */
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status = pj_init();
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PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);
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/* Must create a pool factory before we can allocate any memory. */
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pj_caching_pool_init(&cp, &pj_pool_factory_default_policy, 0);
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/*
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* Initialize media endpoint.
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* This will implicitly initialize PJMEDIA too.
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*/
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status = pjmedia_endpt_create(&cp.factory, NULL, 1, &med_endpt);
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PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);
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/* Create memory pool for our file player */
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pool = pj_pool_create( &cp.factory, /* pool factory */
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"wav", /* pool name. */
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4000, /* init size */
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4000, /* increment size */
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NULL /* callback on error */
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);
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/* Create file media port from the original WAV file */
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status = pjmedia_wav_player_port_create( pool, /* memory pool */
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argv[1], /* file to play */
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40, /* ptime. */
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PJMEDIA_FILE_NO_LOOP, /* flags */
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0, /* default buffer */
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&file_ori_port/* returned port */
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);
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if (status != PJ_SUCCESS) {
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app_perror(THIS_FILE, "Unable to use WAV file", status);
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return 1;
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}
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/* Create file media port from the degraded WAV file */
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status = pjmedia_wav_player_port_create( pool, /* memory pool */
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argv[2], /* file to play */
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40, /* ptime. */
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PJMEDIA_FILE_NO_LOOP, /* flags */
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0, /* default buffer */
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&file_deg_port/* returned port */
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);
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if (status != PJ_SUCCESS) {
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app_perror(THIS_FILE, "Unable to use WAV file", status);
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return 1;
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}
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if (file_ori_port->info.fmt.det.aud.clock_rate !=
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file_deg_port->info.fmt.det.aud.clock_rate)
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{
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app_perror(THIS_FILE, "Clock rates must be same.", PJ_EINVAL);
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return 1;
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}
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if (argc > 3)
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first_nsamples = atoi(argv[3]) *
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file_ori_port->info.fmt.det.aud.clock_rate / 1000;
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if (argc > 4)
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detail = atoi(argv[4]);
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while (1) {
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pjmedia_frame f1, f2;
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f1.buf = buf1;
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f1.size = BYTES_PER_FRAME;
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f2.buf = buf2;
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f2.size = BYTES_PER_FRAME;
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status = pjmedia_port_get_frame(file_ori_port, &f1);
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if (status == PJ_EEOF) {
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break;
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} else if (status != PJ_SUCCESS) {
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app_perror(THIS_FILE, "Error occured while reading file", status);
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break;
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}
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status = pjmedia_port_get_frame(file_deg_port, &f2);
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if (status == PJ_EEOF) {
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break;
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} else if (status != PJ_SUCCESS) {
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app_perror(THIS_FILE, "Error occured while reading file", status);
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break;
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}
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/* Calculate magnitudes */
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ref_mag += sum_mult_sig(f1.buf, f1.buf, BYTES_PER_FRAME >> 1);
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deg_mag += sum_mult_sig(f2.buf, f2.buf, BYTES_PER_FRAME >> 1);
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mix_mag += sum_mult_sig(f1.buf, f2.buf, BYTES_PER_FRAME >> 1);
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samples_compared += BYTES_PER_FRAME >> 1;
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if (first_nsamples && samples_compared >= first_nsamples)
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break;
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}
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/* Degraded magnitude compared to reference magnitude
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*/
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res_deg = (int) (deg_mag / ref_mag * 100.0);
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if (res_deg < 0)
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res_deg = -1;
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else if (res_deg >= 81)
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res_deg = 9;
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else
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res_deg = pj_isqrt(res_deg);
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/* Mixed magnitude (don't know what this is actually :D) compared to
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* reference magnitude
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*/
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res_mix = (int) (mix_mag / ref_mag * 100.0);
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if (res_mix < 0)
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res_mix = -1;
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else if (res_mix >= 81)
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res_mix = 9;
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else
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res_mix = pj_isqrt(res_mix);
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/* Overall score.
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* If mixed score is -1, then overall score should be -1 as well.
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* Apply no weighting (1:1) for now.
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*/
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if (res_mix == -1)
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res_overall = -1;
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else
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res_overall = (res_mix*1 + res_deg*1) / 2;
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if (detail) {
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printf("Reference = %.0f\n", ref_mag);
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printf("Degraded = %.0f\n", deg_mag);
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printf("Mixed = %.0f\n", mix_mag);
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printf("\n");
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printf("Score 1 = %d\n", res_deg);
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printf("Score 2 = %d\n", res_mix);
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printf("\n");
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}
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printf("Overall = %d\n", res_overall);
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/* Destroy file port */
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status = pjmedia_port_destroy( file_ori_port );
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PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);
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status = pjmedia_port_destroy( file_deg_port );
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PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);
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/* Release application pool */
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pj_pool_release( pool );
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/* Destroy media endpoint. */
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pjmedia_endpt_destroy( med_endpt );
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/* Destroy pool factory */
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pj_caching_pool_destroy( &cp );
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/* Shutdown PJLIB */
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pj_shutdown();
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/* Done. */
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return 0;
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}
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