Pass metadata to PDs only at runtime, not at decoder start

The SRD_CONF_NUM_PROBES metadata key was removed. It wasn't actually
used for anything, since this is trivially available via the configured
(or default) probe list.

The SRD_CONF_UNITSIZE key was removed. The unit size is instead derived
from the probe list: the number of probes packed into the least amount
of space possible defines the unit size.

PD changes:
* The start() method no longer takes a 'metadata' parameter.
* Metadata now comes in only via the metadata() method, which takes
  a key and value. The only key defined so far is SRD_CONF_SAMPLERATE,
  which is exported into the module namespace.

API changes:
* srd_session_send() now takes an end_samplenum parameter, and had its
  options rearranged.
* srd_session_config_set() is now srd_session_metadata_set(). This keeps
  "config" options for a future feature to allow PDs or frontends to
  configure each other's options on the fly, up and down the stack.

1 files changed, 4 insertions, 7 deletions

diff --git a/libsigrokdecode.h.in b/libsigrokdecode.h.in
index c61a0e4..3eaace6 100644
--- a/libsigrokdecode.h.in
+++ b/libsigrokdecode.h.in
@@ -167,9 +167,7 @@ enum {
 #define SRD_MAX_NUM_PROBES 64
 
 enum {
-	SRD_CONF_NUM_PROBES = 10000,
-	SRD_CONF_UNITSIZE,
-	SRD_CONF_SAMPLERATE,
+	SRD_CONF_SAMPLERATE = 10000,
 };
 
 struct srd_decoder {
@@ -242,9 +240,7 @@ struct srd_decoder_inst {
 	GSList *pd_output;
 	int dec_num_probes;
 	int *dec_probemap;
-	int data_num_probes;
 	int data_unitsize;
-	uint64_t data_samplerate;
 	GSList *next_di;
 };
 
@@ -304,10 +300,11 @@ SRD_API struct srd_decoder_inst *srd_inst_find_by_id(struct srd_session *sess,
 		const char *inst_id);
 SRD_API int srd_session_new(struct srd_session **sess);
 SRD_API int srd_session_start(struct srd_session *sess);
-SRD_API int srd_session_config_set(struct srd_session *sess, int key,
+SRD_API int srd_session_metadata_set(struct srd_session *sess, int key,
 		GVariant *data);
 SRD_API int srd_session_send(struct srd_session *sess,
-		uint64_t start_samplenum, const uint8_t *inbuf, uint64_t inbuflen);
+		uint64_t start_samplenum, uint64_t end_samplenum,
+		const uint8_t *inbuf, uint64_t inbuflen);
 SRD_API int srd_session_destroy(struct srd_session *sess);
 SRD_API int srd_pd_output_callback_add(struct srd_session *sess,
 		int output_type, srd_pd_output_callback_t cb, void *cb_data);