Currently, there are no pre-defined accessors for the elements in topology TLV data. In the absence of such offsets, the tlv data will have to be decoded using hardwired offset numbers 0-N depending on the type of TLV. This patch defines accessor offsets for the type, length, min and mute/step items in TLV data for DB_SCALE type tlv's. These will be used by drivers to decode the TLV data while loading topology thereby improving code readability. The type and len offsets are common for all TLV types. The min and step/mute offsets are specific to DB_SCALE tlv type.
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| @@ -42,6 +42,10 @@ · 41 unmodified lines | ||
| 42 | 42 | #define SNDRV_CTL_TLVD_LENGTH(...) \ |
| 43 | 43 | ((unsigned int)sizeof((const unsigned int[]) { __VA_ARGS__ })) |
| 44 | 44 | |
| 45 | +/* Accessor offsets for TLV data items */ | |
| 46 | +#define SNDRV_CTL_TLVO_TYPE 0 | |
| 47 | +#define SNDRV_CTL_TLVO_LEN 1 | |
| 48 | + | |
| 45 | 49 | #define SNDRV_CTL_TLVD_CONTAINER_ITEM(...) \ |
| 46 | 50 | SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_CONTAINER, __VA_ARGS__) |
| 47 | 51 | #define SNDRV_CTL_TLVD_DECLARE_CONTAINER(name, ...) \ |
| @@ -61,6 +65,10 @@ · 13 unmodified lines | ||
| 61 | 65 | SNDRV_CTL_TLVD_DB_SCALE_ITEM(min, step, mute) \ |
| 62 | 66 | } |
| 63 | 67 | |
| 68 | +/* Accessor offsets for min, mute and step items in dB scale type TLV */ | |
| 69 | +#define SNDRV_CTL_TLVO_DB_SCALE_MIN 2 | |
| 70 | +#define SNDRV_CTL_TLVO_DB_SCALE_MUTE_AND_STEP 3 | |
| 71 | + | |
| 64 | 72 | /* dB scale specified with min/max values instead of step */ |
| 65 | 73 | #define SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \ |
| 66 | 74 | SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX, (min_dB), (max_dB)) |