summaryrefslogtreecommitdiff
path: root/libavcodec/g726.c
diff options
context:
space:
mode:
authorMichael Niedermayer <michaelni@gmx.at>2004-07-22 18:55:36 +0000
committerMichael Niedermayer <michaelni@gmx.at>2004-07-22 18:55:36 +0000
commitef9c5d84beb0f0c05e306d4f73f474335519a32c (patch)
treebec8ce3ab28d5650fa67bed7e98322e4e5ed7376 /libavcodec/g726.c
parent7344c87aa9786936eebe366c929c8e854c857d5c (diff)
make comments doxygen compatible
Originally committed as revision 3333 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/g726.c')
-rw-r--r--libavcodec/g726.c63
1 files changed, 32 insertions, 31 deletions
diff --git a/libavcodec/g726.c b/libavcodec/g726.c
index c016f32cff..fdce022b93 100644
--- a/libavcodec/g726.c
+++ b/libavcodec/g726.c
@@ -23,15 +23,16 @@
#include "avcodec.h"
#include "common.h"
-/*
+/**
+ * G.726 11bit float.
* G.726 Standard uses rather odd 11bit floating point arithmentic for
* numerous occasions. It's a mistery to me why they did it this way
* instead of simply using 32bit integer arithmetic.
*/
typedef struct Float11 {
- int sign; /* 1bit sign */
- int exp; /* 4bit exponent */
- int mant; /* 6bit mantissa */
+ int sign; /**< 1bit sign */
+ int exp; /**< 4bit exponent */
+ int mant; /**< 6bit mantissa */
} Float11;
static inline Float11* i2f(int16_t i, Float11* f)
@@ -61,35 +62,35 @@ static inline int sgn(int value)
}
typedef struct G726Tables {
- int bits; /* bits per sample */
- int* quant; /* quantization table */
- int* iquant; /* inverse quantization table */
- int* W; /* special table #1 ;-) */
- int* F; /* special table #2 */
+ int bits; /**< bits per sample */
+ int* quant; /**< quantization table */
+ int* iquant; /**< inverse quantization table */
+ int* W; /**< special table #1 ;-) */
+ int* F; /**< special table #2 */
} G726Tables;
typedef struct G726Context {
- G726Tables* tbls; /* static tables needed for computation */
+ G726Tables* tbls; /**< static tables needed for computation */
- Float11 sr[2]; /* prev. reconstructed samples */
- Float11 dq[6]; /* prev. difference */
- int a[2]; /* second order predictor coeffs */
- int b[6]; /* sixth order predictor coeffs */
- int pk[2]; /* signs of prev. 2 sez + dq */
+ Float11 sr[2]; /**< prev. reconstructed samples */
+ Float11 dq[6]; /**< prev. difference */
+ int a[2]; /**< second order predictor coeffs */
+ int b[6]; /**< sixth order predictor coeffs */
+ int pk[2]; /**< signs of prev. 2 sez + dq */
- int ap; /* scale factor control */
- int yu; /* fast scale factor */
- int yl; /* slow scale factor */
- int dms; /* short average magnitude of F[i] */
- int dml; /* long average magnitude of F[i] */
- int td; /* tone detect */
-
- int se; /* estimated signal for the next iteration */
- int sez; /* estimated second order prediction */
- int y; /* quantizer scaling factor for the next iteration */
+ int ap; /**< scale factor control */
+ int yu; /**< fast scale factor */
+ int yl; /**< slow scale factor */
+ int dms; /**< short average magnitude of F[i] */
+ int dml; /**< long average magnitude of F[i] */
+ int td; /**< tone detect */
+
+ int se; /**< estimated signal for the next iteration */
+ int sez; /**< estimated second order prediction */
+ int y; /**< quantizer scaling factor for the next iteration */
} G726Context;
-static int quant_tbl16[] = /* 16kbit/s 2bits per sample */
+static int quant_tbl16[] = /**< 16kbit/s 2bits per sample */
{ 260, INT_MAX };
static int iquant_tbl16[] =
{ 116, 365, 365, 116 };
@@ -98,7 +99,7 @@ static int W_tbl16[] =
static int F_tbl16[] =
{ 0, 7, 7, 0 };
-static int quant_tbl24[] = /* 24kbit/s 3bits per sample */
+static int quant_tbl24[] = /**< 24kbit/s 3bits per sample */
{ 7, 217, 330, INT_MAX };
static int iquant_tbl24[] =
{ INT_MIN, 135, 273, 373, 373, 273, 135, INT_MIN };
@@ -107,7 +108,7 @@ static int W_tbl24[] =
static int F_tbl24[] =
{ 0, 1, 2, 7, 7, 2, 1, 0 };
-static int quant_tbl32[] = /* 32kbit/s 4bits per sample */
+static int quant_tbl32[] = /**< 32kbit/s 4bits per sample */
{ -125, 79, 177, 245, 299, 348, 399, INT_MAX };
static int iquant_tbl32[] =
{ INT_MIN, 4, 135, 213, 273, 323, 373, 425,
@@ -118,7 +119,7 @@ static int W_tbl32[] =
static int F_tbl32[] =
{ 0, 0, 0, 1, 1, 1, 3, 7, 7, 3, 1, 1, 1, 0, 0, 0 };
-static int quant_tbl40[] = /* 40kbit/s 5bits per sample */
+static int quant_tbl40[] = /**< 40kbit/s 5bits per sample */
{ -122, -16, 67, 138, 197, 249, 297, 338,
377, 412, 444, 474, 501, 527, 552, INT_MAX };
static int iquant_tbl40[] =
@@ -142,7 +143,7 @@ static G726Tables G726Tables_pool[] =
{ 5, quant_tbl40, iquant_tbl40, W_tbl40, F_tbl40 }};
-/*
+/**
* Para 4.2.2 page 18: Adaptive quantizer.
*/
static inline uint8_t quant(G726Context* c, int d)
@@ -168,7 +169,7 @@ static inline uint8_t quant(G726Context* c, int d)
return i;
}
-/*
+/**
* Para 4.2.3 page 22: Inverse adaptive quantizer.
*/
static inline int16_t inverse_quant(G726Context* c, int i)