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_encdec_c Samples: Encoding and Decoding |
| 23 | * |
| 24 | * This sample shows how to use codec. |
| 25 | * |
| 26 | * This file is pjsip-apps/src/samples/encdec.c |
| 27 | * |
| 28 | * \includelineno encdec.c |
| 29 | */ |
| 30 | |
| 31 | #include <pjlib.h> |
| 32 | #include <pjmedia.h> |
| 33 | #include <pjmedia-codec.h> |
| 34 | |
| 35 | #define THIS_FILE "encdec.c" |
| 36 | |
| 37 | static const char *desc = |
| 38 | " encdec \n" |
| 39 | " \n" |
| 40 | " PURPOSE: \n" |
| 41 | " Encode input WAV with a codec, and decode the result to another WAV \n" |
| 42 | "\n" |
| 43 | "\n" |
| 44 | " USAGE: \n" |
| 45 | " encdec codec input.wav output.wav \n" |
| 46 | "\n" |
| 47 | "\n" |
| 48 | " where:\n" |
| 49 | " codec Set the codec name. \n" |
| 50 | " input.wav Set the input WAV filename. \n" |
| 51 | " output.wav Set the output WAV filename. \n" |
| 52 | |
| 53 | "\n" |
| 54 | ; |
| 55 | |
| 56 | //#undef PJ_TRACE |
| 57 | //#define PJ_TRACE 1 |
| 58 | |
| 59 | #ifndef PJ_TRACE |
| 60 | # define PJ_TRACE 0 |
| 61 | #endif |
| 62 | |
| 63 | #if PJ_TRACE |
| 64 | # define TRACE_(expr) PJ_LOG(4,expr) |
| 65 | #else |
| 66 | # define TRACE_(expr) |
| 67 | #endif |
| 68 | |
| 69 | |
| 70 | static void err(const char *op, pj_status_t status) |
| 71 | { |
| 72 | char errmsg[PJ_ERR_MSG_SIZE]; |
| 73 | pj_strerror(status, errmsg, sizeof(errmsg)); |
| 74 | PJ_LOG(3,("", "%s error: %s", op, errmsg)); |
| 75 | } |
| 76 | |
| 77 | #define CHECK(op) do { \ |
| 78 | status = op; \ |
| 79 | if (status != PJ_SUCCESS) { \ |
| 80 | err(#op, status); \ |
| 81 | return status; \ |
| 82 | } \ |
| 83 | } \ |
| 84 | while (0) |
| 85 | |
| 86 | static pjmedia_endpt *mept; |
| 87 | static unsigned file_msec_duration; |
| 88 | |
| 89 | static pj_status_t enc_dec_test(const char *codec_id, |
| 90 | const char *filein, |
| 91 | const char *fileout) |
| 92 | { |
| 93 | pj_pool_t *pool; |
| 94 | pjmedia_codec_mgr *cm; |
| 95 | pjmedia_codec *codec; |
| 96 | const pjmedia_codec_info *pci; |
| 97 | pjmedia_codec_param param; |
| 98 | unsigned cnt, samples_per_frame; |
| 99 | pj_str_t tmp; |
| 100 | pjmedia_port *wavin, *wavout; |
| 101 | unsigned lost_pct; |
| 102 | pj_status_t status; |
| 103 | |
| 104 | #define T file_msec_duration/1000, file_msec_duration%1000 |
| 105 | |
| 106 | pool = pjmedia_endpt_create_pool(mept, "encdec", 1000, 1000); |
| 107 | |
| 108 | cm = pjmedia_endpt_get_codec_mgr(mept); |
| 109 | |
| 110 | #ifdef LOST_PCT |
| 111 | lost_pct = LOST_PCT; |
| 112 | #else |
| 113 | lost_pct = 0; |
| 114 | #endif |
| 115 | |
| 116 | cnt = 1; |
| 117 | CHECK( pjmedia_codec_mgr_find_codecs_by_id(cm, pj_cstr(&tmp, codec_id), |
| 118 | &cnt, &pci, NULL) ); |
| 119 | CHECK( pjmedia_codec_mgr_get_default_param(cm, pci, ¶m) ); |
| 120 | |
| 121 | samples_per_frame = param.info.clock_rate * param.info.frm_ptime / 1000; |
| 122 | |
| 123 | /* Control VAD */ |
| 124 | param.setting.vad = 1; |
| 125 | |
| 126 | /* Open wav for reading */ |
| 127 | CHECK( pjmedia_wav_player_port_create(pool, filein, |
| 128 | param.info.frm_ptime, |
| 129 | PJMEDIA_FILE_NO_LOOP, 0, &wavin) ); |
| 130 | |
| 131 | /* Open wav for writing */ |
| 132 | CHECK( pjmedia_wav_writer_port_create(pool, fileout, |
| 133 | param.info.clock_rate, |
| 134 | param.info.channel_cnt, |
| 135 | samples_per_frame, |
| 136 | 16, 0, 0, &wavout) ); |
| 137 | |
| 138 | /* Alloc codec */ |
| 139 | CHECK( pjmedia_codec_mgr_alloc_codec(cm, pci, &codec) ); |
| 140 | CHECK( pjmedia_codec_init(codec, pool) ); |
| 141 | CHECK( pjmedia_codec_open(codec, ¶m) ); |
| 142 | |
| 143 | for (;;) { |
| 144 | pjmedia_frame frm_pcm, frm_bit, out_frm, frames[4]; |
| 145 | pj_int16_t pcmbuf[320]; |
| 146 | pj_timestamp ts; |
| 147 | pj_uint8_t bitstream[160]; |
| 148 | |
| 149 | frm_pcm.buf = (char*)pcmbuf; |
| 150 | frm_pcm.size = samples_per_frame * 2; |
| 151 | |
| 152 | /* Read from WAV */ |
| 153 | if (pjmedia_port_get_frame(wavin, &frm_pcm) != PJ_SUCCESS) |
| 154 | break; |
| 155 | if (frm_pcm.type != PJMEDIA_FRAME_TYPE_AUDIO) |
| 156 | break;; |
| 157 | |
| 158 | /* Update duration */ |
| 159 | file_msec_duration += samples_per_frame * 1000 / |
| 160 | param.info.clock_rate; |
| 161 | |
| 162 | /* Encode */ |
| 163 | frm_bit.buf = bitstream; |
| 164 | frm_bit.size = sizeof(bitstream); |
| 165 | CHECK(pjmedia_codec_encode(codec, &frm_pcm, sizeof(bitstream), |
| 166 | &frm_bit)); |
| 167 | |
| 168 | /* On DTX, write zero frame to wavout to maintain duration */ |
| 169 | if (frm_bit.size == 0 || frm_bit.type != PJMEDIA_FRAME_TYPE_AUDIO) { |
| 170 | out_frm.buf = (char*)pcmbuf; |
| 171 | out_frm.size = 160; |
| 172 | CHECK( pjmedia_port_put_frame(wavout, &out_frm) ); |
| 173 | TRACE_((THIS_FILE, "%d.%03d read: %u, enc: %u", |
| 174 | T, frm_pcm.size, frm_bit.size)); |
| 175 | continue; |
| 176 | } |
| 177 | |
| 178 | /* Parse the bitstream (not really necessary for this case |
| 179 | * since we always decode 1 frame, but it's still good |
| 180 | * for testing) |
| 181 | */ |
| 182 | ts.u64 = 0; |
| 183 | cnt = PJ_ARRAY_SIZE(frames); |
| 184 | CHECK( pjmedia_codec_parse(codec, bitstream, frm_bit.size, &ts, &cnt, |
| 185 | frames) ); |
| 186 | CHECK( (cnt==1 ? PJ_SUCCESS : -1) ); |
| 187 | |
| 188 | /* Decode or simulate packet loss */ |
| 189 | out_frm.buf = (char*)pcmbuf; |
| 190 | out_frm.size = sizeof(pcmbuf); |
| 191 | |
| 192 | if ((pj_rand() % 100) < (int)lost_pct) { |
| 193 | /* Simulate loss */ |
| 194 | CHECK( pjmedia_codec_recover(codec, sizeof(pcmbuf), &out_frm) ); |
| 195 | TRACE_((THIS_FILE, "%d.%03d Packet lost", T)); |
| 196 | } else { |
| 197 | /* Decode */ |
| 198 | CHECK( pjmedia_codec_decode(codec, &frames[0], sizeof(pcmbuf), |
| 199 | &out_frm) ); |
| 200 | } |
| 201 | |
| 202 | /* Write to WAV */ |
| 203 | CHECK( pjmedia_port_put_frame(wavout, &out_frm) ); |
| 204 | |
| 205 | TRACE_((THIS_FILE, "%d.%03d read: %u, enc: %u, dec/write: %u", |
| 206 | T, frm_pcm.size, frm_bit.size, out_frm.size)); |
| 207 | } |
| 208 | |
| 209 | /* Close wavs */ |
| 210 | pjmedia_port_destroy(wavout); |
| 211 | pjmedia_port_destroy(wavin); |
| 212 | |
| 213 | /* Close codec */ |
| 214 | pjmedia_codec_close(codec); |
| 215 | pjmedia_codec_mgr_dealloc_codec(cm, codec); |
| 216 | |
| 217 | /* Release pool */ |
| 218 | pj_pool_release(pool); |
| 219 | |
| 220 | return PJ_SUCCESS; |
| 221 | } |
| 222 | |
| 223 | |
| 224 | int main(int argc, char *argv[]) |
| 225 | { |
| 226 | pj_caching_pool cp; |
| 227 | pj_time_val t0, t1; |
| 228 | pj_status_t status; |
| 229 | |
| 230 | if (argc != 4) { |
| 231 | puts(desc); |
| 232 | return 1; |
| 233 | } |
| 234 | |
| 235 | CHECK( pj_init() ); |
| 236 | |
| 237 | pj_caching_pool_init(&cp, NULL, 0); |
| 238 | |
| 239 | CHECK( pjmedia_endpt_create(&cp.factory, NULL, 1, &mept) ); |
| 240 | |
| 241 | /* Register all codecs */ |
| 242 | CHECK( pjmedia_codec_register_audio_codecs(mept, NULL) ); |
| 243 | |
| 244 | pj_gettimeofday(&t0); |
| 245 | status = enc_dec_test(argv[1], argv[2], argv[3]); |
| 246 | pj_gettimeofday(&t1); |
| 247 | PJ_TIME_VAL_SUB(t1, t0); |
| 248 | |
| 249 | pjmedia_endpt_destroy(mept); |
| 250 | pj_caching_pool_destroy(&cp); |
| 251 | pj_shutdown(); |
| 252 | |
| 253 | if (status == PJ_SUCCESS) { |
| 254 | puts(""); |
| 255 | puts("Success"); |
| 256 | printf("Duration: %ds.%03d\n", file_msec_duration/1000, |
| 257 | file_msec_duration%1000); |
| 258 | printf("Time: %lds.%03ld\n", t1.sec, t1.msec); |
| 259 | } |
| 260 | |
| 261 | return 0; |
| 262 | } |
| 263 | |