diff options
Diffstat (limited to 'tinyDAV/src/codecs/g711/tdav_codec_g711.c')
| -rw-r--r-- | tinyDAV/src/codecs/g711/tdav_codec_g711.c | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/tinyDAV/src/codecs/g711/tdav_codec_g711.c b/tinyDAV/src/codecs/g711/tdav_codec_g711.c new file mode 100644 index 0000000..fa970e1 --- /dev/null +++ b/tinyDAV/src/codecs/g711/tdav_codec_g711.c @@ -0,0 +1,326 @@ +/* +* Copyright (C) 2010-2011 Mamadou Diop. +* +* Contact: Mamadou Diop <diopmamadou(at)doubango.org> +* +* This file is part of Open Source Doubango Framework. +* +* DOUBANGO 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 3 of the License, or +* (at your option) any later version. +* +* DOUBANGO 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 DOUBANGO. +* +*/ + +/**@file tdav_codec_g711.c + * @brief G.711u and G.711a (a.k.a PCMU and PCMA) codec plugins. + * + * @author Mamadou Diop <diopmamadou(at)doubango.org> + * + + */ +#include "tinydav/codecs/g711/tdav_codec_g711.h" + +#include "tinydav/codecs/g711/g711.h" /* algorithms */ + +#include "tsk_memory.h" +#include "tsk_debug.h" + +/* ============ G.711u Plugin interface ================= */ + +#define tdav_codec_g711u_open tsk_null +#define tdav_codec_g711u_close tsk_null +#define tdav_codec_g711u_sdp_att_get tsk_null + +static tsk_size_t tdav_codec_g711u_encode(tmedia_codec_t* self, const void* in_data, tsk_size_t in_size, void** out_data, tsk_size_t* out_max_size) +{ + register tsk_size_t i; + register uint8_t* pout_data; + register int16_t* pin_data; + tsk_size_t out_size; + + if(!self || !in_data || !in_size || !out_data){ + TSK_DEBUG_ERROR("Invalid parameter"); + return 0; + } + + out_size = (in_size >> 1); + + if(*out_max_size <out_size){ + if(!(*out_data = tsk_realloc(*out_data, out_size))){ + TSK_DEBUG_ERROR("Failed to allocate new buffer"); + *out_max_size = 0; + return 0; + } + *out_max_size = out_size; + } + + pout_data = *out_data; + pin_data = (int16_t*)in_data; + for(i = 0; i<out_size; i++){ + pout_data[i] = linear2ulaw(pin_data[i]); + } + + return out_size; +} + +static tsk_size_t tdav_codec_g711u_decode(tmedia_codec_t* self, const void* in_data, tsk_size_t in_size, void** out_data, tsk_size_t* out_max_size, const tsk_object_t* proto_hdr) +{ + tsk_size_t i; + tsk_size_t out_size; + + if(!self || !in_data || !in_size || !out_data){ + TSK_DEBUG_ERROR("Invalid parameter"); + return 0; + } + + out_size = (in_size << 1); + + /* allocate new buffer */ + if(*out_max_size<out_size){ + if(!(*out_data = tsk_realloc(*out_data, out_size))){ + TSK_DEBUG_ERROR("Failed to allocate new buffer"); + *out_max_size = 0; + return 0; + } + *out_max_size = out_size; + } + + for(i = 0; i<in_size; i++){ + ((short*)*out_data)[i] = ulaw2linear(((uint8_t*)in_data)[i]); + } + + return out_size; +} + +static tsk_bool_t tdav_codec_g711u_sdp_att_match(const tmedia_codec_t* codec, const char* att_name, const char* att_value) +{ /* always match */ + return tsk_true; +} + + +// +// G.711u Plugin definition +// + +/* constructor */ +static tsk_object_t* tdav_codec_g711u_ctor(tsk_object_t * self, va_list * app) +{ + tdav_codec_g711u_t *g711u = self; + if(g711u){ + /* init base: called by tmedia_codec_create() */ + /* init self */ + } + return self; +} +/* destructor */ +static tsk_object_t* tdav_codec_g711u_dtor(tsk_object_t * self) +{ + tdav_codec_g711u_t *g711u = self; + if(g711u){ + /* deinit base */ + tmedia_codec_audio_deinit(g711u); + /* deinit self */ + } + + return self; +} +/* object definition */ +static const tsk_object_def_t tdav_codec_g711u_def_s = +{ + sizeof(tdav_codec_g711u_t), + tdav_codec_g711u_ctor, + tdav_codec_g711u_dtor, + tmedia_codec_cmp, +}; +/* plugin definition*/ +static const tmedia_codec_plugin_def_t tdav_codec_g711u_plugin_def_s = +{ + &tdav_codec_g711u_def_s, + + tmedia_audio, + tmedia_codec_id_pcmu, + "PCMU", + "G.711u codec (native)", + TMEDIA_CODEC_FORMAT_G711u, + tsk_false, + 8000, // rate + + { /* audio */ + 1, // channels + 0 // ptime @deprecated + }, + + /* video */ + {0}, + + tsk_null, // set() + tdav_codec_g711u_open, + tdav_codec_g711u_close, + tdav_codec_g711u_encode, + tdav_codec_g711u_decode, + tdav_codec_g711u_sdp_att_match, + tdav_codec_g711u_sdp_att_get +}; +const tmedia_codec_plugin_def_t *tdav_codec_g711u_plugin_def_t = &tdav_codec_g711u_plugin_def_s; + + +/* ============ G.711a Plugin interface ================= */ + +#define tdav_codec_g711a_open tsk_null +#define tdav_codec_g711a_close tsk_null +#define tdav_codec_g711a_sdp_att_get tsk_null + +static tsk_size_t tdav_codec_g711a_encode(tmedia_codec_t* self, const void* in_data, tsk_size_t in_size, void** out_data, tsk_size_t* out_max_size) +{ + register tsk_size_t i; + register uint8_t* pout_data; + register int16_t* pin_data; + tsk_size_t out_size; + + if(!self || !in_data || !in_size || !out_data){ + TSK_DEBUG_ERROR("Invalid parameter"); + return 0; + } + + out_size = (in_size >> 1); + + if(*out_max_size < out_size){ + if(!(*out_data = tsk_realloc(*out_data, out_size))){ + TSK_DEBUG_ERROR("Failed to allocate new buffer"); + *out_max_size = 0; + return 0; + } + *out_max_size = out_size; + } + + pout_data = *out_data; + pin_data = (int16_t*)in_data; + for(i = 0; i<out_size; i++){ + pout_data[i] = linear2alaw(pin_data[i]); + } + + return out_size; +} + +#if 0 +FILE* file = tsk_null; +int count = 0; +#endif +static tsk_size_t tdav_codec_g711a_decode(tmedia_codec_t* self, const void* in_data, tsk_size_t in_size, void** out_data, tsk_size_t* out_max_size, const tsk_object_t* proto_hdr) +{ + tsk_size_t i, out_size; + + if(!self || !in_data || !in_size || !out_data){ + TSK_DEBUG_ERROR("Invalid parameter"); + return 0; + } + out_size = (in_size << 1); +#if 0 + if(!file && count<=1000){ + file = fopen("./g711a.pcm", "wb"); + } +#endif + /* allocate new buffer */ + if(*out_max_size < out_size){ + if(!(*out_data = tsk_realloc(*out_data, out_size))){ + TSK_DEBUG_ERROR("Failed to allocate new buffer"); + *out_max_size = 0; + return 0; + } + *out_max_size = out_size; + } + + for(i = 0; i<in_size; i++){ + ((short*)*out_data)[i] = alaw2linear(((uint8_t*)in_data)[i]); + } +#if 0 + if(++count<=1000){ + fwrite(*out_data, sizeof(short), in_size, file); + } + else if(file){ + fclose(file); + file = tsk_null; + } +#endif + return out_size; +} + +static tsk_bool_t tdav_codec_g711a_sdp_att_match(const tmedia_codec_t* codec, const char* att_name, const char* att_value) +{ /* always match */ + return tsk_true; +} + + +// +// G.711a Plugin definition +// + +/* constructor */ +static tsk_object_t* tdav_codec_g711a_ctor(tsk_object_t * self, va_list * app) +{ + tdav_codec_g711a_t *g711a = self; + if(g711a){ + /* init base: called by tmedia_codec_create() */ + /* init self */ + } + return self; +} +/* destructor */ +static tsk_object_t* tdav_codec_g711a_dtor(tsk_object_t * self) +{ + tdav_codec_g711a_t *g711a = self; + if(g711a){ + /* deinit base */ + tmedia_codec_audio_deinit(g711a); + /* deinit self */ + } + + return self; +} +/* object definition */ +static const tsk_object_def_t tdav_codec_g711a_def_s = +{ + sizeof(tdav_codec_g711a_t), + tdav_codec_g711a_ctor, + tdav_codec_g711a_dtor, + tmedia_codec_cmp, +}; +/* plugin definition*/ +static const tmedia_codec_plugin_def_t tdav_codec_g711a_plugin_def_s = +{ + &tdav_codec_g711a_def_s, + + tmedia_audio, + tmedia_codec_id_pcma, + "PCMA", + "G.711a codec (native)", + TMEDIA_CODEC_FORMAT_G711a, + tsk_false, + 8000, // rate + + { /* audio */ + 1, // channels + 0 // ptime @deprecated + }, + + /* video */ + {0}, + + tsk_null, // set() + tdav_codec_g711a_open, + tdav_codec_g711a_close, + tdav_codec_g711a_encode, + tdav_codec_g711a_decode, + tdav_codec_g711a_sdp_att_match, + tdav_codec_g711a_sdp_att_get +}; +const tmedia_codec_plugin_def_t *tdav_codec_g711a_plugin_def_t = &tdav_codec_g711a_plugin_def_s; |
