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00036 #include "asterisk.h"
00037
00038 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 130129 $")
00039
00040 #include "asterisk/linkedlists.h"
00041 #include "asterisk/module.h"
00042 #include "asterisk/config.h"
00043 #include "asterisk/options.h"
00044 #include "asterisk/translate.h"
00045 #include "asterisk/utils.h"
00046
00047 #define BUFFER_SAMPLES 8096
00048 #define BUF_SHIFT 5
00049
00050
00051
00052 #include "g722/g722.h"
00053 #include "slin_g722_ex.h"
00054 #include "g722_slin_ex.h"
00055
00056 struct g722_encoder_pvt {
00057 g722_encode_state_t g722;
00058 };
00059
00060 struct g722_decoder_pvt {
00061 g722_decode_state_t g722;
00062 };
00063
00064
00065 static int lintog722_new(struct ast_trans_pvt *pvt)
00066 {
00067 struct g722_encoder_pvt *tmp = pvt->pvt;
00068
00069 g722_encode_init(&tmp->g722, 64000, G722_SAMPLE_RATE_8000);
00070
00071 return 0;
00072 }
00073
00074
00075 static int g722tolin_new(struct ast_trans_pvt *pvt)
00076 {
00077 struct g722_decoder_pvt *tmp = pvt->pvt;
00078
00079 g722_decode_init(&tmp->g722, 64000, G722_SAMPLE_RATE_8000);
00080
00081 return 0;
00082 }
00083
00084 static int g722tolin_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
00085 {
00086 struct g722_decoder_pvt *tmp = pvt->pvt;
00087 int out_samples;
00088 int in_samples;
00089
00090
00091 in_samples = f->samples / 2;
00092
00093 out_samples = g722_decode(&tmp->g722, (int16_t *) &pvt->outbuf[pvt->samples * sizeof(int16_t)], (uint8_t *) f->data, in_samples);
00094
00095 pvt->samples += out_samples;
00096
00097 pvt->datalen += (out_samples * sizeof(int16_t));
00098
00099 return 0;
00100 }
00101
00102 static int lintog722_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
00103 {
00104 struct g722_encoder_pvt *tmp = pvt->pvt;
00105 int outlen;
00106
00107 outlen = g722_encode(&tmp->g722, (uint8_t *) (&pvt->outbuf[pvt->datalen]), (int16_t *) f->data, f->samples);
00108
00109
00110 pvt->samples += outlen * 2;
00111
00112 pvt->datalen += outlen;
00113
00114 return 0;
00115 }
00116
00117 static struct ast_frame *g722tolin_sample(void)
00118 {
00119 static struct ast_frame f = {
00120 .frametype = AST_FRAME_VOICE,
00121 .subclass = AST_FORMAT_G722,
00122 .datalen = sizeof(g722_slin_ex),
00123 .samples = sizeof(g722_slin_ex) * 2,
00124 .src = __PRETTY_FUNCTION__,
00125 .data = g722_slin_ex,
00126 };
00127
00128 return &f;
00129 }
00130
00131 static struct ast_frame *lintog722_sample (void)
00132 {
00133 static struct ast_frame f = {
00134 .frametype = AST_FRAME_VOICE,
00135 .subclass = AST_FORMAT_SLINEAR,
00136 .datalen = sizeof(slin_g722_ex),
00137 .samples = ARRAY_LEN(slin_g722_ex),
00138 .src = __PRETTY_FUNCTION__,
00139 .data = slin_g722_ex,
00140 };
00141
00142 return &f;
00143 }
00144
00145 static struct ast_translator g722tolin = {
00146 .name = "g722tolin",
00147 .srcfmt = AST_FORMAT_G722,
00148 .dstfmt = AST_FORMAT_SLINEAR,
00149 .newpvt = g722tolin_new,
00150 .framein = g722tolin_framein,
00151 .sample = g722tolin_sample,
00152 .desc_size = sizeof(struct g722_decoder_pvt),
00153 .buffer_samples = BUFFER_SAMPLES / sizeof(int16_t),
00154 .buf_size = BUFFER_SAMPLES,
00155 .plc_samples = 160,
00156 };
00157
00158 static struct ast_translator lintog722 = {
00159 .name = "lintog722",
00160 .srcfmt = AST_FORMAT_SLINEAR,
00161 .dstfmt = AST_FORMAT_G722,
00162 .newpvt = lintog722_new,
00163 .framein = lintog722_framein,
00164 .sample = lintog722_sample,
00165 .desc_size = sizeof(struct g722_encoder_pvt),
00166 .buffer_samples = BUFFER_SAMPLES * 2,
00167 .buf_size = BUFFER_SAMPLES,
00168 };
00169
00170 static int parse_config(int reload)
00171 {
00172 struct ast_variable *var;
00173 struct ast_config *cfg = ast_config_load("codecs.conf");
00174
00175 if (!cfg)
00176 return 0;
00177 for (var = ast_variable_browse(cfg, "plc"); var; var = var->next) {
00178 if (!strcasecmp(var->name, "genericplc")) {
00179 g722tolin.useplc = ast_true(var->value) ? 1 : 0;
00180 if (option_verbose > 2)
00181 ast_verbose(VERBOSE_PREFIX_3 "codec_g722: %susing generic PLC\n", g722tolin.useplc ? "" : "not ");
00182 }
00183 }
00184 ast_config_destroy(cfg);
00185 return 0;
00186 }
00187
00188 static int reload(void)
00189 {
00190 if (parse_config(1))
00191 return AST_MODULE_LOAD_DECLINE;
00192 return AST_MODULE_LOAD_SUCCESS;
00193 }
00194
00195 static int unload_module(void)
00196 {
00197 int res = 0;
00198
00199 res |= ast_unregister_translator(&g722tolin);
00200 res |= ast_unregister_translator(&lintog722);
00201
00202 return res;
00203 }
00204
00205 static int load_module(void)
00206 {
00207 int res = 0;
00208
00209 if (parse_config(0))
00210 return AST_MODULE_LOAD_DECLINE;
00211
00212 res |= ast_register_translator(&g722tolin);
00213 res |= ast_register_translator(&lintog722);
00214
00215 if (res) {
00216 unload_module();
00217 return AST_MODULE_LOAD_FAILURE;
00218 }
00219
00220 return AST_MODULE_LOAD_SUCCESS;
00221 }
00222
00223 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "ITU G.722-64kbps G722 Transcoder",
00224 .load = load_module,
00225 .unload = unload_module,
00226 .reload = reload,
00227 );