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Diffstat (limited to 'Graphic_Equalizer/src/sample.hcc')
| -rw-r--r-- | Graphic_Equalizer/src/sample.hcc | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/Graphic_Equalizer/src/sample.hcc b/Graphic_Equalizer/src/sample.hcc deleted file mode 100644 index 000baf9..0000000 --- a/Graphic_Equalizer/src/sample.hcc +++ /dev/null @@ -1,106 +0,0 @@ -/*! \file sample.hcc
- *
- * \section generic Handle audio sampling and buffer rotation.
- *
- * \section project Project information.
- * Project Graphic Equalizer\n
- * \author O.M. Schinagl
- * \date 20041021
- * \version 0.1
- *
- * \section copyright Copyright
- * Copyright ©2004 Koninklijke Philips Electronics N.V. All rights reserved
- *
- * \section history Change history
- * 20041021: O.M. Schinagl\n Initial version
- *
- ********************************************************************/
-
-/******** System Includes *************/
-
-/******** Application Includes ********/
-#include "sample.hch"
-
-
-
-/*
- * Pointer that points towards the current 64 bits samples.
- */
-signed 16 *audio_in_ptr;
-
-/*
- * 64 step counter to keep track of our samples. This is a private variable.
- */
-unsigned 8 sample_count;
-
-
-
-/*! \fn void sample_add(signed 16 in_sample);
- * \brief This procedure adds the supplied sample to the input buffer.
- *
- * \param signed 16 in_sample 16 bits signed sample to be added.
- *
- * \return void
- * \retval void
- */
-void sample_add(signed 16 in_sample) {
- /*
- * We only sample 64 bits in our buffer, hence we circulate around the
- * last 6 bits.
- */
- audio_in_ptr[sample_count <-6] = in_sample;
- sample_count++;
-} /* --- sample_add() --- */
-
-
-
-/*! \fn void sample_get(signed 16 *out_sample);
- * \brief This procedure gets the sample from the current output buffer.
- *
- * \param * in_sample pointer to storage for sample.
- *
- * \return void
- * \retval void
- */
-void sample_get(signed 16 *out_sample) {
- /*
- * We circulate around a 64 bits buffer, therefor we only use the last
- * 6 bits.
- */
- *out_sample = audio_out_ptr[sample_count <-6];
-} /* --- sample_get() --- */
-
-
-
-/*! \fn unsigned 1 sample_rotate_buffers(void);
- * \brief This procedure rotates our buffers around if 64 samples are
- * read into our current buffer.
- *
- * \param in_sample 16 bits signed sample to be added.
- *
- * \return 1 when 64 samples have passed, 0 otherwise.
- * \retval unsigned 1;
- */
-unsigned 1 sample_rotate_buffers(void) {
- unsigned 1 retval; /* store for returnvalue */
-
- retval = 0;
- /*
- * We only want to read 64 samples, but calculations work nicer if we
- * use 256 samples. Therefor we circulate our audio pointer around.
- */
- if (!(sample_count <- 6)) {
- /*
- * 64 Samples have passed. We are back at '0'. Use the full
- * sample count as index which is 0 64 128 or 192 and back to
- * 0. Our Output is only 128 big so we only look at the
- * 7 LSB. Also, notify the main application that 64 samples
- * have been processed.
- */
- par {
- audio_in_ptr = &pcm_audio_in[sample_count];
- audio_out_ptr = &pcm_audio_out[(sample_count <- 7)];
- retval = 1;
- }
- }
-} /* --- sample_rotate_buffers() --- */
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