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spa: add SPA_AUDIO_MAX_POSITION

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Add a new SPA_AUDIO_MAX_POSITION constant with the maximum number of
channel positions that can be kept in the various audio_info structures.

Repurpose the SPA_AUDIO_MAX_CHANNELS as a suggestion for applications
for the max allowed number of channels in the system. Make it possible
to make this a compile time constant.
This commit is contained in:
Wim Taymans 2025-10-21 16:08:24 +02:00
parent dbc5c81e4a
commit f19b075306
4 changed files with 14 additions and 7 deletions
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15
spa/include/spa/param/audio/raw.h
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@ -18,8 +18,15 @@ extern "C" {
* \{
*/
/* this is the max number of channels for position info */
/* This is the max number of position info, changing this will change the
* ABI */
#define SPA_AUDIO_MAX_POSITION 64u
/* The suggested number of max channels, can be a compile time constant and
* does not affect ABI or API */
#ifndef SPA_AUDIO_MAX_CHANNELS
#define SPA_AUDIO_MAX_CHANNELS 64u
#endif
enum spa_audio_format {
SPA_AUDIO_FORMAT_UNKNOWN,
@ -278,9 +285,9 @@ struct spa_audio_info_raw {
uint32_t flags; /*< extra flags */
uint32_t rate; /*< sample rate */
uint32_t channels; /*< number of channels. This can be larger than
* SPA_AUDIO_MAX_CHANNELS, the position is taken
* (index % SPA_AUDIO_MAX_CHANNELS) */
uint32_t position[SPA_AUDIO_MAX_CHANNELS]; /*< channel position from enum spa_audio_channel */
* SPA_AUDIO_MAX_POSITION, the position is taken
* (index % SPA_AUDIO_MAX_POSITION) */
uint32_t position[SPA_AUDIO_MAX_POSITION]; /*< channel position from enum spa_audio_channel */
};
#define SPA_AUDIO_INFO_RAW_INIT(...) ((struct spa_audio_info_raw) { __VA_ARGS__ })