kenmirrors/freeswitch
1
0
Fork 0
mirror of https://github.com/signalwire/freeswitch.git synced 2025-08-14 01:49:05 +00:00
Code Issues Projects Releases Wiki Activity

g726 work

Browse Source 
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@2432 d0543943-73ff-0310-b7d9-9358b9ac24b2
This commit is contained in:
Anthony Minessale
2006-08-29 21:07:24 +00:00
parent b4f50d092e
commit ded7fa6c6f
2 changed files with 52 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
src/mod/codecs/mod_g726/mod_g726.c
View File

@@ -34,20 +34,27 @@
static const char modname[] = "mod_g726";
typedef struct {
g726_state context;
uint8_t flag;
uint8_t bytes;
} g726_handle_t;
static switch_status_t switch_g726_init(switch_codec_t *codec, switch_codec_flag_t flags,
const switch_codec_settings_t *codec_settings)
{
int encoding, decoding;
g726_state *context = NULL;
g726_handle_t *handle;
encoding = (flags & SWITCH_CODEC_FLAG_ENCODE);
decoding = (flags & SWITCH_CODEC_FLAG_DECODE);
if (!(encoding || decoding) || (!(context = switch_core_alloc(codec->memory_pool, sizeof(g726_state))))) {
if (!(encoding || decoding) || (!(handle = switch_core_alloc(codec->memory_pool, sizeof(*handle))))) {
return SWITCH_STATUS_FALSE;
} else {
g726_init_state(context);
codec->private_info = context;
g726_init_state(&handle->context);
codec->private_info = handle;
handle->bytes = codec->implementation->encoded_bytes_per_frame / (codec->implementation->microseconds_per_frame / 1000);
return SWITCH_STATUS_SUCCESS;
}
}
@@ -75,7 +82,8 @@ static switch_status_t switch_g726_encode(switch_codec_t *codec,
unsigned int *flag)
{
g726_state *context = codec->private_info;
g726_handle_t *handle = codec->private_info;
g726_state *context = &handle->context;
uint32_t len = codec->implementation->bytes_per_frame;
uint32_t elen = codec->implementation->encoded_bytes_per_frame;
encoder_t encoder;
@@ -112,17 +120,17 @@ static switch_status_t switch_g726_encode(switch_codec_t *codec,
uint32_t loops = decoded_data_len / (sizeof(*ddp));
for (x = 0; x < loops && new_len < *encoded_data_len; x++) {
int sample = encoder(*ddp, AUDIO_ENCODING_LINEAR, context);
*edp = sample;
edp++;
if (handle->flag & 0x80) {
edp[new_len++] = ((handle->flag & 0xf) << handle->bytes) | encoder(*ddp, AUDIO_ENCODING_LINEAR, context);
handle->flag = 0;
} else {
handle->flag = 0x80 | encoder(*ddp, AUDIO_ENCODING_LINEAR, context);
}
ddp++;
new_len++;
}
if (new_len <= *encoded_data_len) {
printf("encode %d->%d %d\n", decoded_data_len, elen, new_len / 2);
*encoded_data_len = new_len / 2;
*encoded_data_len = new_len;
} else {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "buffer overflow!!! %u >= %u\n", new_len, *encoded_data_len);
return SWITCH_STATUS_FALSE;