Commit Graph

33 Commits

Author SHA1 Message Date
Martin Ling 8f996b8948 probe_groups: API changes required to implement probe groups. 2013-11-08 01:03:16 +01:00
Uwe Hermann e11a1ebacc alsa: Fix double-free issue.
This fixes bug #129.
2013-08-07 16:21:56 +02:00
Uwe Hermann 3b412e3a30 s/clear_instances/dev_clear/.
Consistently use the same name for the dev_clear() API callback
everywhere.
2013-06-02 16:56:41 +02:00
Uwe Hermann f6beaac55c std: Drop hw_ from function names.
The per-driver API calls no longer have a hw_ prefix (e.g. hw_init()
became init() and so on), so drop the 'hw_' from the std versions
for those API callbacks too.
2013-06-02 16:46:18 +02:00
Uwe Hermann c43cf4d40e alsa: Use std_dev_clear(). 2013-06-02 16:46:17 +02:00
Uwe Hermann 6078d2c996 Use consistent API callback function names.
This now matches what the 'new-driver' tool generates.
2013-05-10 20:01:37 +02:00
Uwe Hermann decfe89d4e Drop some lines that are no longer needed. 2013-05-10 18:30:32 +02:00
Uwe Hermann 29a27196a1 s/DRIVER_LOG_DOMAIN/LOG_PREFIX/.
This is more correct anyway, and also a bit shorter and more readable.
2013-05-03 21:59:32 +02:00
Bert Vermeulen e73ffd4238 Enforce open device before config_set()/dev_acquisition_start() 2013-04-24 22:03:50 +02:00
Bert Vermeulen bd6fbf628a drivers: return SR_ERR_NA on unsupported config key
Fixes bug 89.
2013-04-16 11:00:55 +02:00
Bert Vermeulen aa0dbd683c alsa: Adjust to GVariant-based sr_config_* functions 2013-04-11 18:32:07 +02:00
Uwe Hermann 4afdfd4628 Add and use std_session_send_df_header().
This is a small helper function which sends the SR_DF_HEADER packet that
drivers usually emit in their hw_dev_acquisition_start() API callback.
It simplifies and shortens the hw_dev_acquisition_start() functions
quite a bit.

It also simplifies the input modules which send an SR_DF_HEADER packet, too.

This patch also automatically removes some unneeded malloc/free in some
drivers for the 'packet' and 'header' structs used for SR_DF_HEADER.
2013-02-07 10:46:28 +01:00
Uwe Hermann 961009b0c4 hw_dev_close(): Move common checks to wrapper.
Check the relevant arguments for != NULL before calling the actual
driver-specific function, so that the driver can safely assume those
arguments are non-NULL. This removes the need to duplicate these
checks in every driver.
2013-02-05 18:46:33 +01:00
Uwe Hermann 0e94d524c1 Shorten/simplify hw_dev_list() implementations. 2013-02-05 18:27:05 +01:00
Uwe Hermann 063e7aef6d Factor out common hw_init() driver code.
Most drivers do pretty much the same things in their hw_init()
right now, so factor out that code to std_hw_init() in std.c.
2013-01-29 12:56:02 +01:00
Bert Vermeulen 9a6517d14b Deprecate SR_DI_HWCAPS.
This is replaced by SR_CONF_DEVICE_OPTIONS.
2013-01-25 15:01:49 +01:00
Bert Vermeulen 123e131383 Deprecate SR_DI_CUR_SAMPLERATE.
This is replaced by SR_CONF_SAMPLERATE.
2013-01-25 03:17:36 +01:00
Bert Vermeulen fbec8bd2f3 deprecate SR_DI_SAMPLERATES
This is replaced by a call to config_list() with id SR_CONF_SAMPLERATE.
2013-01-25 02:39:58 +01:00
Bert Vermeulen a1c743fc51 drivers: implement config_list() 2013-01-25 02:37:26 +01:00
Bert Vermeulen 035a1078fd drivers: rename and reorganize config get/set
The driver API calls info_get() and dev_config_set() have been renamed
to config_get() and config_set(), respectively.
2013-01-24 19:19:09 +01:00
Bert Vermeulen 1953564a96 Rename SR_HWOPT_* and SR_HWCAP_* to SR_CONF_* 2013-01-21 23:32:50 +01:00
Bert Vermeulen 1987b8d63e drivers: use new sr_config struct
Sending an SR_DF_META packet at the start of every stream is not
mandatory; the frontend should ask for what it needs, and any extra
information the driver wants to send will come in due time.
2013-01-21 23:32:49 +01:00
Uwe Hermann 4ebd48b352 Remove non-error hw_info_get() messages.
Currently hw_info_get() can receive requests for entries (info_id) that
the specific driver doesn't support. That is (right now) a valid
use-case and not an error (might change later, though).

Thus, for now, don't output messages for such requests at all (certainly
not as sr_err() where they show up in e.g. sigrok-cli output per default).
2013-01-20 18:48:02 +01:00
Uwe Hermann 3d6de074a4 alsa: Silence ALSA scanning process.
Errors while opening or configuring ALSA devices during scan for devices
should not be shown by default (i.e., no sr_err() usage). Non-working
or non-accessible devices (due to permissions or other reasons) will
simply not show up in frontends. Use sr_dbg() instead of sr_err().
2013-01-16 00:02:24 +01:00
Bert Vermeulen 6b8d6f93bb Get rid of obsolete SR_DI_NUM_PROBES and SR_DI_PROBE_NAMES.
Frontends should use the probe list in the device's sr_dev_inst
to get this information.
2013-01-15 17:42:23 +01:00
Uwe Hermann 52ba6e05d5 alsa: Improved error reporting. 2013-01-01 00:37:17 +01:00
Uwe Hermann 721ecf3d97 alsa: Cosmetics, coding style, typos. 2013-01-01 00:37:17 +01:00
Alexandru Gagniuc 65faa197ae alsa: Find supported samplerates during device scan
Since we are using the 'hw' interface of ALSA, we don't have the luxury of
samplerate conversion, given by the 'plughw' interface. If we try to set a
samplerate that is not supported, ALSA will just throw an error.

We can test for the supported samplerates, and create a list of supported
samplerates, then limit the selection to only those values. The frontend can
query the list of supported samplerates.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
2013-01-01 00:37:17 +01:00
Alexandru Gagniuc 729850c9e7 alsa: Fix sample acquisition and send normalized values
The alsa driver requested signed 16-bit integers from ALSA, but casted them to
to an unsigned 16bit before finally casting them to a float. The end result was
that half of the wave would be clipped off.
We also requested data in little endian format. ALSA can be instructed to send
data with the correct endianness for the platform, without needing to worry
about what that is.

This patch attempts three points, which, together, fix the acquisition:
1) Request data from ALSA without specifying endianness; ALSA will handle the
endianness.
2) Simplify the int16_t to float loop by using straightforward indexes.
3) Normalize every value before sending it on the session bus.

NOTE: If testing with PulseView, it will appear as if sigrok is sending all
zeroes. sigrok is sending correct data, but since the data is normalized,
PulseView will incorrectly plot it as a straight line.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
2013-01-01 00:37:17 +01:00
Alexandru Gagniuc 6944b2d02f alsa: Scan all soundcards and create a sigrok device per input
The alsa driver only works with device "default". This limits the driver's
scope to whatever device ALSA deems to be "default". It is desirable to have
access to all ALSA devices from sigrok.

Change the alsa device scan so that:
Each alsa device (not alsa card) gets its own sigrok device
For example,
    hw:1,0 == sigrok device 0
    hw:1,1 == sigrok device 1
    hw:2,0 == sigrok device 2
    hw:2,1 == sigrok device 3
    hw:2,2 == sigrok device 4
    [...]

We don't currently look at alsa subdevices. We only use subdevice 0.
Every input device will have its own channels (left, right, etc). Each of
those channels gets mapped to a different sigrok probe. A device with 4
channels will have 4 probes from sigrok's perspective.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
2013-01-01 00:37:17 +01:00
Alexandru Gagniuc 0d6ff10394 alsa: Do not use snd_pcm_hw_params_set_rate_near()
snd_pcm_hw_params_set_rate_near() will try to use the samplerate closest to the
given value, potentially starting the acquisition with a different samplerate
than the one specified.

Instead, use snd_pcm_hw_params_set_rate(). It will return an error if the
samplerate is not supported by the hardware, which is arguably better than
collecting data with a different samplerate than the one specified.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
2013-01-01 00:37:17 +01:00
Uwe Hermann 7869340103 Shorten probe_names[] arrays everywhere.
Also, NULL-terminate all of them.
2012-12-26 00:16:07 +01:00
Alexandru Gagniuc 9cd9f6b71c alsa: Split into api.c and protocol.c
This is the driver model agreed upon for all drivers.

As a result of the split, a devc->num_probes field had to be added in order to
reduce the interdependence between api.c and protocol.c .

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
2012-12-23 17:25:37 +01:00
Renamed from hardware/alsa/alsa.c (Browse further)