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bluez5: account for codec internal delay in latency values

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Encoders and some decoders have additional internal latency that needs
to be accounted for.

This mostly matters for AAC (~40ms), as the other BT codecs have much
lower delays (~5ms).
This commit is contained in:
Pauli Virtanen 2024-02-23 21:04:47 +02:00 • committed by Wim Taymans
parent 1b3b577b8f
commit 2d30ab94c2
10 changed files with 151 additions and 10 deletions
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13
spa/plugins/bluez5/media-codecs.h
View file

@ -26,7 +26,7 @@
#define SPA_TYPE_INTERFACE_Bluez5CodecMedia SPA_TYPE_INFO_INTERFACE_BASE "Bluez5:Codec:Media:Private"
#define SPA_VERSION_BLUEZ5_CODEC_MEDIA 9
#define SPA_VERSION_BLUEZ5_CODEC_MEDIA 10
struct spa_bluez5_codec_a2dp {
struct spa_interface iface;
@ -199,6 +199,17 @@ struct media_codec {
int (*increase_bitpool) (void *data);
void (*set_log) (struct spa_log *global_log);
/**
* Get codec internal delays, in samples at input/output rates.
*
* The delay does not include the duration of the PCM input/output
* audio data, but is that internal to the codec.
*
* \param[out] encoder Encoder delay in samples, or NULL
* \param[out] decoder Decoder delay in samples, or NULL
*/
void (*get_delay) (void *data, uint32_t *encoder, uint32_t *decoder);
};
struct media_codec_config {