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spring cleaning
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4795 d0543943-73ff-0310-b7d9-9358b9ac24b2
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Anthony Minessale committed
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@@ -28,16 +28,16 @@
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*
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* mod_lpc10.c -- LPC10 Codec Module
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*
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*/
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*/
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#include "switch.h"
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#include "lpc10.h"
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enum {
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SamplesPerFrame = 180,
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BitsPerFrame = 54,
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BytesPerFrame = (BitsPerFrame+7)/8,
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BitsPerSecond = 2400
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BitsPerFrame = 54,
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BytesPerFrame = (BitsPerFrame + 7) / 8,
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BitsPerSecond = 2400
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};
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#define SampleValueScale 32768.0
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@@ -52,7 +52,7 @@ struct lpc10_context {
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};
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static switch_status_t switch_lpc10_init(switch_codec_t *codec, switch_codec_flag_t flags,
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const switch_codec_settings_t *codec_settings)
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const switch_codec_settings_t *codec_settings)
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{
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uint32_t encoding, decoding;
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struct lpc10_context *context = NULL;
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@@ -78,44 +78,40 @@ static switch_status_t switch_lpc10_init(switch_codec_t *codec, switch_codec_fla
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}
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}
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static switch_status_t switch_lpc10_destroy(switch_codec_t *codec)
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static switch_status_t switch_lpc10_destroy(switch_codec_t *codec)
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{
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codec->private_info = NULL;
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return SWITCH_STATUS_SUCCESS;
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}
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static switch_status_t switch_lpc10_encode(switch_codec_t *codec,
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switch_codec_t *other_codec,
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void *decoded_data,
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uint32_t decoded_data_len,
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uint32_t decoded_rate,
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void *encoded_data,
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uint32_t *encoded_data_len,
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uint32_t *encoded_rate,
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unsigned int *flag)
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static switch_status_t switch_lpc10_encode(switch_codec_t *codec,
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switch_codec_t *other_codec,
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void *decoded_data,
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uint32_t decoded_data_len,
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uint32_t decoded_rate,
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void *encoded_data,
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uint32_t * encoded_data_len, uint32_t * encoded_rate, unsigned int *flag)
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{
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struct lpc10_context *context = codec->private_info;
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uint8_t i;
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int32_t bits[BitsPerFrame];
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real speech[SamplesPerFrame];
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const short *sampleBuffer = (const short *)decoded_data;
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unsigned char *buffer = (unsigned char *)encoded_data;
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const short *sampleBuffer = (const short *) decoded_data;
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unsigned char *buffer = (unsigned char *) encoded_data;
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if (!context) {
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return SWITCH_STATUS_FALSE;
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}
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for (i = 0; i < SamplesPerFrame; i++)
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speech[i] = (real)(sampleBuffer[i]/SampleValueScale);
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speech[i] = (real) (sampleBuffer[i] / SampleValueScale);
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lpc10_encode(speech, bits, &context->encoder_object);
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memset(encoded_data, 0, BytesPerFrame);
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for (i = 0; i < BitsPerFrame; i++) {
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if (bits[i])
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buffer[i>>3] |= 1 << (i&7);
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buffer[i >> 3] |= 1 << (i & 7);
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}
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*encoded_data_len = BytesPerFrame;
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@@ -123,91 +119,87 @@ static switch_status_t switch_lpc10_encode(switch_codec_t *codec,
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return SWITCH_STATUS_SUCCESS;
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}
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static switch_status_t switch_lpc10_decode(switch_codec_t *codec,
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switch_codec_t *other_codec,
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void *encoded_data,
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uint32_t encoded_data_len,
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uint32_t encoded_rate,
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void *decoded_data,
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uint32_t *decoded_data_len,
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uint32_t *decoded_rate,
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unsigned int *flag)
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static switch_status_t switch_lpc10_decode(switch_codec_t *codec,
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switch_codec_t *other_codec,
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void *encoded_data,
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uint32_t encoded_data_len,
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uint32_t encoded_rate,
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void *decoded_data,
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uint32_t * decoded_data_len, uint32_t * decoded_rate, unsigned int *flag)
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{
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struct lpc10_context *context = codec->private_info;
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int i;
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INT32 bits[BitsPerFrame];
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real speech[SamplesPerFrame];
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short *sampleBuffer = (short *)decoded_data;
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const unsigned char *buffer = (const unsigned char *)encoded_data;
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short *sampleBuffer = (short *) decoded_data;
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const unsigned char *buffer = (const unsigned char *) encoded_data;
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if (!context) {
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return SWITCH_STATUS_FALSE;
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}
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for (i = 0; i < BitsPerFrame; i++)
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bits[i] = (buffer[i>>3]&(1<<(i&7))) != 0;
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bits[i] = (buffer[i >> 3] & (1 << (i & 7))) != 0;
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lpc10_decode(bits, speech, &context->decoder_object);
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for (i = 0; i < SamplesPerFrame; i++) {
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real sample = (real)(speech[i]*SampleValueScale);
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real sample = (real) (speech[i] * SampleValueScale);
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if (sample < MinSampleValue)
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sample = MinSampleValue;
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else if (sample > MaxSampleValue)
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sample = MaxSampleValue;
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sampleBuffer[i] = (short)sample;
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sampleBuffer[i] = (short) sample;
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}
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*decoded_data_len = SamplesPerFrame*2;
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*decoded_data_len = SamplesPerFrame * 2;
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return SWITCH_STATUS_SUCCESS;
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}
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/* Registration */
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/* Registration */
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static const switch_codec_implementation_t lpc10_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 7,
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/*.iananame */ "LPC",
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static const switch_codec_implementation_t lpc10_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 7,
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/*.iananame */ "LPC",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ 240,
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/*.microseconds_per_frame */ 22500,
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/*.samples_per_frame */ 180,
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/*.bytes_per_frame */ 360,
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/*.encoded_bytes_per_frame */ 7,
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/*.number_of_channels */ 1,
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/*.pref_frames_per_packet */ 1,
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/*.max_frames_per_packet */ 1,
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/*.init */ switch_lpc10_init,
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/*.encode */ switch_lpc10_encode,
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/*.decode */ switch_lpc10_decode,
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/*.destroy */ switch_lpc10_destroy,
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/*.bits_per_second */ 240,
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/*.microseconds_per_frame */ 22500,
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/*.samples_per_frame */ 180,
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/*.bytes_per_frame */ 360,
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/*.encoded_bytes_per_frame */ 7,
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/*.number_of_channels */ 1,
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/*.pref_frames_per_packet */ 1,
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/*.max_frames_per_packet */ 1,
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/*.init */ switch_lpc10_init,
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/*.encode */ switch_lpc10_encode,
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/*.decode */ switch_lpc10_decode,
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/*.destroy */ switch_lpc10_destroy,
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};
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const switch_codec_interface_t lpc10_codec_interface = {
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/*.interface_name */ "LPC-10 2.4kbps",
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/*.implementations */ &lpc10_implementation,
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const switch_codec_interface_t lpc10_codec_interface = {
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/*.interface_name */ "LPC-10 2.4kbps",
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/*.implementations */ &lpc10_implementation,
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};
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static switch_loadable_module_interface_t lpc10_module_interface = {
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/*.module_name */ modname,
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/*.endpoint_interface */ NULL,
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/*.timer_interface */ NULL,
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/*.dialplan_interface */ NULL,
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/*.codec_interface */ &lpc10_codec_interface,
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/*.application_interface */ NULL
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static switch_loadable_module_interface_t lpc10_module_interface = {
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/*.module_name */ modname,
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/*.endpoint_interface */ NULL,
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/*.timer_interface */ NULL,
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/*.dialplan_interface */ NULL,
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/*.codec_interface */ &lpc10_codec_interface,
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/*.application_interface */ NULL
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};
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SWITCH_MOD_DECLARE(switch_status_t) switch_module_load(const switch_loadable_module_interface_t **module_interface,
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char *filename)
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char *filename)
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{
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/* connect my internal structure to the blank pointer passed to me */
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/* connect my internal structure to the blank pointer passed to me */
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*module_interface = &lpc10_module_interface;
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/* indicate that the module should continue to be loaded */
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/* indicate that the module should continue to be loaded */
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return SWITCH_STATUS_SUCCESS;
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}
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