diff options
Diffstat (limited to 'tinyDAV/src/codecs/ilbc/tdav_codec_ilbc.c')
| -rw-r--r-- | tinyDAV/src/codecs/ilbc/tdav_codec_ilbc.c | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/tinyDAV/src/codecs/ilbc/tdav_codec_ilbc.c b/tinyDAV/src/codecs/ilbc/tdav_codec_ilbc.c new file mode 100644 index 0000000..23271b4 --- /dev/null +++ b/tinyDAV/src/codecs/ilbc/tdav_codec_ilbc.c @@ -0,0 +1,256 @@ +/*
+* Copyright (C) 2009-2010 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_ilbc.c
+ * @brief iLBC codec
+ *
+ * @author Mamadou Diop <diopmamadou(at)doubango.org>
+ *
+ * @date Created: Sat Nov 8 16:54:58 2009 mdiop
+ */
+#include "tinydav/codecs/ilbc/tdav_codec_ilbc.h"
+
+#if HAVE_ILBC
+
+#include "tsk_memory.h"
+#include "tsk_debug.h"
+
+#define TDAV_ILBC_MODE 20
+
+/* ============ iLBC Plugin interface ================= */
+
+#define tdav_codec_ilbc_fmtp_set tsk_null
+
+int tdav_codec_ilbc_open(tmedia_codec_t* self)
+{
+ tdav_codec_ilbc_t* ilbc = (tdav_codec_ilbc_t*)self;
+
+ initEncode(&ilbc->encoder, TDAV_ILBC_MODE);
+ initDecode(&ilbc->decoder, TDAV_ILBC_MODE, tsk_true/* Enhancer */);
+
+ return 0;
+}
+
+int tdav_codec_ilbc_close(tmedia_codec_t* self)
+{
+ tdav_codec_ilbc_t* ilbc = (tdav_codec_ilbc_t*)self;
+
+ //ilbc->encoder = {0};
+ //ilbc->decoder = {0};
+
+ return 0;
+}
+
+tsk_size_t tdav_codec_ilbc_encode(tmedia_codec_t* self, const void* in_data, tsk_size_t in_size, void** out_data, tsk_size_t* out_max_size)
+{
+ tdav_codec_ilbc_t* ilbc = (tdav_codec_ilbc_t*)self;
+ int k;
+
+ if(!self || !in_data || !in_size || !out_data){
+ TSK_DEBUG_ERROR("Invalid parameter");
+ return 0;
+ }
+
+ /* convert signal to float */
+ for(k=0; k<ilbc->encoder.blockl; k++){
+ ilbc->encblock[k] = (float)((short*)in_data)[k];
+ }
+
+ /* allocate new buffer if needed */
+ if((int)*out_max_size <ilbc->encoder.no_of_bytes){
+ if(!(*out_data = tsk_realloc(*out_data, ilbc->encoder.no_of_bytes))){
+ TSK_DEBUG_ERROR("Failed to allocate new buffer");
+ *out_max_size = 0;
+ return 0;
+ }
+ *out_max_size = ilbc->encoder.no_of_bytes;
+ }
+
+ /* do the actual encoding */
+ iLBC_encode(*out_data, ilbc->encblock, &ilbc->encoder);
+
+ return ilbc->encoder.no_of_bytes;
+}
+
+tsk_size_t tdav_codec_ilbc_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)
+{
+ int blocks, i, k, block_size;
+ float dtmp;
+ tsk_size_t out_size;
+ tdav_codec_ilbc_t* ilbc = (tdav_codec_ilbc_t*)self;
+
+ if(!self || !in_data || !in_size || !out_data){
+ TSK_DEBUG_ERROR("Invalid parameter");
+ return 0;
+ }
+
+ if((in_size % NO_OF_BYTES_20MS) == 0){
+ /* Using 20ms mode */
+ blocks = (in_size/NO_OF_BYTES_20MS);
+ out_size = (BLOCKL_20MS * blocks) * sizeof(short);
+ block_size = out_size/blocks;
+ if(ilbc->decoder.mode != 20){
+ initDecode(&ilbc->decoder, 20, tsk_true/* Enhancer */);
+ }
+ }
+ else if((in_size % NO_OF_BYTES_30MS) == 0){
+ /* Using 30ms mode */
+ blocks = (in_size/NO_OF_BYTES_30MS);
+ out_size = (BLOCKL_30MS * blocks) * sizeof(short);
+ block_size = out_size/blocks;
+ if(ilbc->decoder.mode != 30){
+ initDecode(&ilbc->decoder, 30, tsk_true/* Enhancer */);
+ }
+ }
+ else{
+ TSK_DEBUG_ERROR("Invalid iLBC mode");
+ return 0;
+ }
+
+ /* allocate new buffer if needed */
+ 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<blocks; i++){
+ iLBC_decode(ilbc->decblock, &((uint8_t*)in_data)[i*block_size], &ilbc->decoder, 1/* Normal */);
+
+ /* convert to short */
+ for(k=0; k<ilbc->decoder.blockl; k++){
+ dtmp=ilbc->decblock[k];
+
+ if(dtmp<MIN_SAMPLE){
+ dtmp = MIN_SAMPLE;
+ }
+ else if(dtmp>MAX_SAMPLE){
+ dtmp = MAX_SAMPLE;
+ }
+
+ ((short*)*out_data)[(i*block_size) + k] = ((short) dtmp);
+ }
+ }
+
+ return out_size;
+}
+
+char* tdav_codec_ilbc_fmtp_get(const tmedia_codec_t* codec)
+{
+ char* fmtp = tsk_null;
+ tsk_sprintf(&fmtp, "mode=%d", TDAV_ILBC_MODE);
+ return fmtp;
+}
+
+tsk_bool_t tdav_codec_ilbc_fmtp_match(const tmedia_codec_t* codec, const char* fmtp)
+{ /* RFC 3952 - 5. Mapping To SDP Parameters
+
+ The offer contains the preferred mode of the offerer. The answerer
+ may agree to that mode by including the same mode in the answer, or
+ may include a different mode. The resulting mode used by both
+ parties SHALL be the lower of the bandwidth modes in the offer and
+ answer.
+
+ That is, an offer of "mode=20" receiving an answer of "mode=30" will
+ result in "mode=30" being used by both participants. Similarly, an
+ offer of "mode=30" and an answer of "mode=20" will result in
+ "mode=30" being used by both participants.
+
+ This is important when one end point utilizes a bandwidth constrained
+ link (e.g., 28.8k modem link or slower), where only the lower frame
+ size will work.
+ */
+ return tsk_true; // FIXME
+}
+
+
+//
+// iLBC Plugin definition
+//
+
+/* constructor */
+static tsk_object_t* tdav_codec_ilbc_ctor(tsk_object_t * self, va_list * app)
+{
+ tdav_codec_ilbc_t *ilbc = self;
+ if(ilbc){
+ /* init base: called by tmedia_codec_create() */
+ /* init self */
+ }
+ return self;
+}
+/* destructor */
+static tsk_object_t* tdav_codec_ilbc_dtor(tsk_object_t * self)
+{
+ tdav_codec_ilbc_t *ilbc = self;
+ if(ilbc){
+ /* deinit base */
+ tmedia_codec_audio_deinit(ilbc);
+ /* deinit self */
+ //ilbc->encoder = {0};
+ //ilbc->decoder = {0};
+ }
+
+ return self;
+}
+/* object definition */
+static const tsk_object_def_t tdav_codec_ilbc_def_s =
+{
+ sizeof(tdav_codec_ilbc_t),
+ tdav_codec_ilbc_ctor,
+ tdav_codec_ilbc_dtor,
+ tmedia_codec_cmp,
+};
+/* plugin definition*/
+static const tmedia_codec_plugin_def_t tdav_codec_ilbc_plugin_def_s =
+{
+ &tdav_codec_ilbc_def_s,
+
+ tmedia_audio,
+ "iLBC",
+ "iLBC codec",
+ TMEDIA_CODEC_FORMAT_ILBC,
+ tsk_true,
+ 8000, // rate
+
+ { /* audio */
+ 1, // channels
+ 20 // ptime
+ },
+
+ /* video */
+ {0},
+
+ tdav_codec_ilbc_open,
+ tdav_codec_ilbc_close,
+ tdav_codec_ilbc_encode,
+ tdav_codec_ilbc_decode,
+ tdav_codec_ilbc_fmtp_match,
+ tdav_codec_ilbc_fmtp_get,
+ tdav_codec_ilbc_fmtp_set
+};
+const tmedia_codec_plugin_def_t *tdav_codec_ilbc_plugin_def_t = &tdav_codec_ilbc_plugin_def_s;
+
+
+#endif /* HAVE_ILBC */
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