Commit 1c30198b authored by Christophe Massiot's avatar Christophe Massiot

more ATSC A/52 support

parent 846029a6
......@@ -49,6 +49,7 @@ extern "C"
#define A52_FSCOD_441KHZ 1
#define A52_FSCOD_32KHZ 2
#define A52_FSCOD_RESERVED 3
#define A52_FRAME_SAMPLES 1536
/*****************************************************************************
* A/52 syncinfo (A/52:2012 Table 5.1)
......@@ -57,6 +58,7 @@ extern "C"
* - fscod 2
* - frmsizecod 6
*****************************************************************************/
#define A52_SYNCINFO_SIZE 5
/* A/52 Frame Size Code Table (A/52:2012 Table 5.18) */
static const uint16_t a52_frame_size_code_tab[38][3] = {
......@@ -176,6 +178,12 @@ static inline uint16_t a52_get_frame_size(uint8_t i_fscod, uint8_t i_frmsizecod)
return a52_frame_size_code_tab[i_frmsizecod][i_fscod] * 2;
}
static inline bool a52_sync_compare_formats(const uint8_t *p_a521, const uint8_t *p_a522)
{
return p_a521[0] == p_a522[0] && p_a521[1] == p_a522[1] &&
p_a521[4] == p_a522[1];
}
/*****************************************************************************
* A/52 bsi (Bit Stream Information)
*****************************************************************************/
......@@ -227,6 +235,11 @@ static inline void a52_set_cmixlev(uint8_t *p_a52, uint8_t i_cmixlev)
/*****************************************************************************
* A/52 Annex E
*****************************************************************************/
#define A52E_FSCOD2_24KHZ 0
#define A52E_FSCOD2_2205KHZ 1
#define A52E_FSCOD2_16KHZ 2
#define A52E_FSCOD2_RESERVED 3
static inline uint8_t a52e_get_strmtyp(const uint8_t *p_a52)
{
return (p_a52[2] & 0xc0) >> 5;
......@@ -277,6 +290,22 @@ static inline void a52e_set_fscod(uint8_t *p_a52, uint8_t i_fscod)
p_a52[4] |= (i_fscod & 0x3) << 6;
}
static inline uint8_t a52e_get_fscod2(const uint8_t *p_a52)
{
return (p_a52[4] & 0x30) >> 4;
}
static inline void a52e_set_fscod2(uint8_t *p_a52, uint8_t i_fscod)
{
p_a52[4] &= ~0x30;
p_a52[4] |= (i_fscod & 0x3) << 4;
}
static inline bool a52e_sync_compare_formats(const uint8_t *p_a521, const uint8_t *p_a522)
{
return !memcmp(p_a521, p_a522, A52_SYNCINFO_SIZE);
}
#ifdef __cplusplus
}
#endif
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment