Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
| 21 | /** |
| 22 | * \page page_pjmedia_samples_mix_c Samples: Mixing WAV files |
| 23 | * |
| 24 | * This file is pjsip-apps/src/samples/mix.c |
| 25 | * |
| 26 | * \includelineno mix.c |
| 27 | */ |
| 28 | |
| 29 | #include <pjlib.h> |
| 30 | #include <pjlib-util.h> |
| 31 | #include <pjmedia.h> |
| 32 | |
| 33 | #define THIS_FILE "mix.c" |
| 34 | |
| 35 | static const char *desc = |
| 36 | " mix\n" |
| 37 | "\n" |
| 38 | " PURPOSE:\n" |
| 39 | " Mix input WAV files and save it to output WAV. Input WAV can have\n" |
| 40 | " different clock rate.\n" |
| 41 | "\n" |
| 42 | "\n" |
| 43 | " USAGE:\n" |
| 44 | " mix [options] output.wav input1.wav [input2.wav] ...\n" |
| 45 | "\n" |
| 46 | " arguments:\n" |
| 47 | " output.wav Set the output WAV filename.\n" |
| 48 | " input1.wav Set the input WAV filename.\n" |
| 49 | " input2.wav Set the input WAV filename.\n" |
| 50 | "\n" |
| 51 | " options:\n" |
| 52 | " -c N Set clock rate to N Hz (default 16000)\n" |
| 53 | " -f Force write (overwrite output without warning\n" |
| 54 | ; |
| 55 | |
| 56 | #define MAX_WAV 16 |
| 57 | #define PTIME 20 |
| 58 | #define APPEND 1000 |
| 59 | |
| 60 | struct wav_input |
| 61 | { |
| 62 | const char *fname; |
| 63 | pjmedia_port *port; |
| 64 | unsigned slot; |
| 65 | }; |
| 66 | |
| 67 | static int err_ret(const char *title, pj_status_t status) |
| 68 | { |
| 69 | char errmsg[PJ_ERR_MSG_SIZE]; |
| 70 | pj_strerror(status, errmsg, sizeof(errmsg)); |
| 71 | PJ_LOG(3,(THIS_FILE, "%s error: %s", title, errmsg)); |
| 72 | return 1; |
| 73 | } |
| 74 | |
| 75 | static void usage(void) |
| 76 | { |
| 77 | puts(desc); |
| 78 | } |
| 79 | |
| 80 | int main(int argc, char *argv[]) |
| 81 | { |
| 82 | pj_caching_pool cp; |
| 83 | pj_pool_t *pool; |
| 84 | pjmedia_endpt *med_ept; |
| 85 | unsigned clock_rate = 16000; |
| 86 | int c, force=0; |
| 87 | const char *out_fname; |
| 88 | pjmedia_conf *conf; |
| 89 | pjmedia_port *wavout; |
| 90 | struct wav_input wav_input[MAX_WAV]; |
| 91 | pj_size_t longest = 0, processed; |
| 92 | unsigned i, input_cnt = 0; |
| 93 | pj_status_t status; |
| 94 | |
| 95 | #define CHECK(op) do { \ |
| 96 | status = op; \ |
| 97 | if (status != PJ_SUCCESS) \ |
| 98 | return err_ret(#op, status); \ |
| 99 | } while (0) |
| 100 | |
| 101 | |
| 102 | /* Parse arguments */ |
| 103 | while ((c=pj_getopt(argc, argv, "c:f")) != -1) { |
| 104 | switch (c) { |
| 105 | case 'c': |
| 106 | clock_rate = atoi(pj_optarg); |
| 107 | if (clock_rate < 1000) { |
| 108 | puts("Error: invalid clock rate"); |
| 109 | usage(); |
| 110 | return -1; |
| 111 | } |
| 112 | break; |
| 113 | case 'f': |
| 114 | force = 1; |
| 115 | break; |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | /* Get output WAV name */ |
| 120 | if (pj_optind == argc) { |
| 121 | puts("Error: no WAV output is specified"); |
| 122 | usage(); |
| 123 | return 1; |
| 124 | } |
| 125 | |
| 126 | out_fname = argv[pj_optind++]; |
| 127 | if (force==0 && pj_file_exists(out_fname)) { |
| 128 | char in[8]; |
| 129 | |
| 130 | printf("File %s exists, overwrite? [Y/N] ", out_fname); |
| 131 | fflush(stdout); |
| 132 | if (fgets(in, sizeof(in), stdin) == NULL) |
| 133 | return 1; |
| 134 | if (pj_tolower(in[0]) != 'y') |
| 135 | return 1; |
| 136 | } |
| 137 | |
| 138 | /* Scan input file names */ |
| 139 | for (input_cnt=0 ; pj_optind<argc && input_cnt<MAX_WAV; |
| 140 | ++pj_optind, ++input_cnt) |
| 141 | { |
| 142 | if (!pj_file_exists(argv[pj_optind])) { |
| 143 | printf("Error: input file %s doesn't exist\n", |
| 144 | argv[pj_optind]); |
| 145 | return 1; |
| 146 | } |
| 147 | wav_input[input_cnt].fname = argv[pj_optind]; |
| 148 | wav_input[input_cnt].port = NULL; |
| 149 | wav_input[input_cnt].slot = 0; |
| 150 | } |
| 151 | |
| 152 | if (input_cnt == 0) { |
| 153 | puts("Error: no input WAV is specified"); |
| 154 | return 0; |
| 155 | } |
| 156 | |
| 157 | /* Initialialize */ |
| 158 | CHECK( pj_init() ); |
| 159 | CHECK( pjlib_util_init() ); |
| 160 | pj_caching_pool_init(&cp, NULL, 0); |
| 161 | CHECK( pjmedia_endpt_create(&cp.factory, NULL, 1, &med_ept) ); |
| 162 | |
| 163 | pool = pj_pool_create(&cp.factory, "mix", 1000, 1000, NULL); |
| 164 | |
| 165 | /* Create the bridge */ |
| 166 | CHECK( pjmedia_conf_create(pool, MAX_WAV+4, clock_rate, 1, |
| 167 | clock_rate * PTIME / 1000, 16, |
| 168 | PJMEDIA_CONF_NO_DEVICE, &conf) ); |
| 169 | |
| 170 | /* Create the WAV output */ |
| 171 | CHECK( pjmedia_wav_writer_port_create(pool, out_fname, clock_rate, 1, |
| 172 | clock_rate * PTIME / 1000, |
| 173 | 16, 0, 0, &wavout) ); |
| 174 | |
| 175 | /* Create and register each WAV input to the bridge */ |
| 176 | for (i=0; i<input_cnt; ++i) { |
| 177 | pj_ssize_t len; |
| 178 | |
| 179 | CHECK( pjmedia_wav_player_port_create(pool, wav_input[i].fname, 20, |
| 180 | PJMEDIA_FILE_NO_LOOP, 0, |
| 181 | &wav_input[i].port) ); |
| 182 | len = pjmedia_wav_player_get_len(wav_input[i].port); |
| 183 | len = (pj_ssize_t)(len * 1.0 * clock_rate / |
| 184 | PJMEDIA_PIA_SRATE(&wav_input[i].port->info)); |
| 185 | if (len > (pj_ssize_t)longest) |
| 186 | longest = len; |
| 187 | |
| 188 | CHECK( pjmedia_conf_add_port(conf, pool, wav_input[i].port, |
| 189 | NULL, &wav_input[i].slot)); |
| 190 | |
| 191 | CHECK( pjmedia_conf_connect_port(conf, wav_input[i].slot, 0, 0) ); |
| 192 | } |
| 193 | |
| 194 | /* Loop reading frame from the bridge and write it to WAV */ |
| 195 | processed = 0; |
| 196 | while (processed < longest + clock_rate * APPEND * 2 / 1000) { |
| 197 | pj_int16_t framebuf[PTIME * 48000 / 1000]; |
| 198 | pjmedia_port *cp = pjmedia_conf_get_master_port(conf); |
| 199 | pjmedia_frame frame; |
| 200 | |
| 201 | frame.buf = framebuf; |
| 202 | frame.size = PJMEDIA_PIA_SPF(&cp->info) * 2; |
| 203 | pj_assert(frame.size <= sizeof(framebuf)); |
| 204 | |
| 205 | CHECK( pjmedia_port_get_frame(cp, &frame) ); |
| 206 | |
| 207 | if (frame.type != PJMEDIA_FRAME_TYPE_AUDIO) { |
| 208 | pj_bzero(frame.buf, frame.size); |
| 209 | frame.type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 210 | } |
| 211 | |
| 212 | CHECK( pjmedia_port_put_frame(wavout, &frame)); |
| 213 | |
| 214 | processed += frame.size; |
| 215 | } |
| 216 | |
| 217 | PJ_LOG(3,(THIS_FILE, "Done. Output duration: %d.%03d", |
| 218 | (processed >> 2)/clock_rate, |
| 219 | ((processed >> 2)*1000/clock_rate) % 1000)); |
| 220 | |
| 221 | /* Shutdown everything */ |
| 222 | CHECK( pjmedia_port_destroy(wavout) ); |
| 223 | for (i=0; i<input_cnt; ++i) { |
| 224 | CHECK( pjmedia_conf_remove_port(conf, wav_input[i].slot) ); |
| 225 | CHECK( pjmedia_port_destroy(wav_input[i].port) ); |
| 226 | } |
| 227 | |
| 228 | CHECK(pjmedia_conf_destroy(conf)); |
| 229 | CHECK(pjmedia_endpt_destroy(med_ept)); |
| 230 | |
| 231 | pj_pool_release(pool); |
| 232 | pj_caching_pool_destroy(&cp); |
| 233 | pj_shutdown(); |
| 234 | |
| 235 | return 0; |
| 236 | } |
| 237 | |