* with 1/3 resolution, 19 < pitch_delay < 85
* integers only, 85 <= pitch_delay <= 143
*/
-int ff_acelp_decode_8bit_to_1st_delay3(int ac_index);
+static inline int ff_acelp_decode_8bit_to_1st_delay3(int ac_index)
+{
+ ac_index += 58;
+ if (ac_index > 254)
+ ac_index = 3 * ac_index - 510;
+ return ac_index;
+}
/**
* @brief Decode pitch delay of the second subframe encoded by 5 or 6 bits
* @remark The routine is used in G.729 @@8k, AMR @@10.2k, AMR @@7.95k,
* AMR @@7.4k for the second subframe.
*/
-int ff_acelp_decode_5_6_bit_to_2nd_delay3(
- int ac_index,
- int pitch_delay_min);
+static inline int ff_acelp_decode_5_6_bit_to_2nd_delay3(int ac_index,
+ int pitch_delay_min)
+{
+ return 3 * pitch_delay_min + ac_index - 2;
+}
/**
* @brief Decode pitch delay with 1/3 precision.
* @remark The routine is used in G.729 @@6.4k, AMR @@6.7k, AMR @@5.9k,
* AMR @@5.15k, AMR @@4.75k for the second subframe.
*/
-int ff_acelp_decode_4bit_to_2nd_delay3(
- int ac_index,
- int pitch_delay_min);
+static inline int ff_acelp_decode_4bit_to_2nd_delay3(int ac_index,
+ int pitch_delay_min)
+{
+ if (ac_index < 4)
+ return 3 * (ac_index + pitch_delay_min);
+ else if (ac_index < 12)
+ return 3 * pitch_delay_min + ac_index + 6;
+ else
+ return 3 * (ac_index + pitch_delay_min) - 18;
+}
/**
* @brief Decode pitch delay of the first subframe encoded by 9 bits
*
* @remark The routine is used in AMR @@12.2k for the first and third subframes.
*/
-int ff_acelp_decode_9bit_to_1st_delay6(int ac_index);
+static inline int ff_acelp_decode_9bit_to_1st_delay6(int ac_index)
+{
+ if (ac_index < 463)
+ return ac_index + 105;
+ else
+ return 6 * (ac_index - 368);
+}
/**
* @brief Decode pitch delay of the second subframe encoded by 6 bits
*
* @remark The routine is used in AMR @@12.2k for the second and fourth subframes.
*/
-int ff_acelp_decode_6bit_to_2nd_delay6(
- int ac_index,
- int pitch_delay_min);
+static inline int ff_acelp_decode_6bit_to_2nd_delay6(int ac_index,
+ int pitch_delay_min)
+{
+ return 6 * pitch_delay_min + ac_index - 3;
+}
/**
* @brief Update past quantized energies