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tools & cpp: Add support of asymetric frame sizes of a stereo stream

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This commit is contained in:
Antoine Soulier
2024-01-10 14:44:49 -08:00
parent 71ffd784d5
commit 4d014e33e7
7 changed files with 166 additions and 97 deletions
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21
include/lc3.h
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@@ -279,14 +279,29 @@ int lc3_hr_frame_bytes(bool hrmode, int dt_us, int sr_hz, int bitrate);
int lc3_frame_bytes(int dt_us, int bitrate);
/**
* Return the size of frame blocks, from bitrate
* A frame block contains the frame data from all channels.
* hrmode Enable High-Resolution mode (48000 and 96000 sample rates)
* dt_us Frame duration in us, 2500, 5000, 7500 or 10000
* sr_hz Sample rate in Hz, 8000, 16000, 24000, 32000, 48000 or 96000
* nchannels The number of channels (or frames) in the block (<= 8)
* bitrate Target bitrate in bit per second, 0 or `INT_MAX` returns
* respectively the minimum and maximum allowed size.
* return The floor size in bytes of the frames, -1 on bad parameters
*/
int lc3_hr_frame_block_bytes(bool hrmode,
int dt_us, int sr_hz, int nchannels, int bitrate);
int lc3_frame_block_bytes(int dt_us, int nframes, int bitrate);
/**
* Resolve the bitrate, from the size of frames
* hrmode Enable High-Resolution mode (48000 and 96000 sample rates)
* dt_us Frame duration in us, 2500, 5000, 7500 or 10000
* sr_hz Sample rate in Hz, 8000, 16000, 24000, 32000, 48000 or 96000
* nbytes Size in bytes of the frames, 0 or `INT_MAX` returns
* respectively the minimum and maximum allowed bitrate.
* return The according bitrate in bps, -1 on bad parameters
* nbytes Size in bytes of the frames or frame blocks
* return The ceiled bitrate in bps, -1 on bad parameters
*/
int lc3_hr_resolve_bitrate(bool hrmode, int dt_us, int sr_hz, int nbytes);