summaryrefslogtreecommitdiffstats
path: root/AUTHORS.md
blob: 137420bedbdc947e5937e6218fa3876d7dbc27ec (plain) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

# Authors
* [Alessandro Cosentino](https://github.com/cosenal): <cosenal@gmail.com>
* [Bernhard Posselt](https://github.com/Raydiation): <dev@bernhard-posselt.com>

## Designers

* [Jan-Christoph Borchardt](https://github.com/jancborchardt): <hey@jancborchardt.net>
* [Raghu Nayyar](https://github.com/raghunayyar): <me@iraghu.com>
* [Bernhard Posselt](https://github.com/Raydiation): <dev@bernhard-posselt.com>


## Contributors

* [Robin Appelman](https://github.com/icewind1991): <icewind@owncloud.com>
* [Morris Jobke](https://github.com/kabum): <morris.jobke@gmail.com>
* [Lukas Reschke](https://github.com/LukasReschke): <lukas@statuscode.ch>
* [bluehaze](https://github.com/bluehaze)
* [Dave Hou Qingping](https://github.com/houqp): <dave2008713@gmail.com> 
* [David Kleuker](https://github.com/davidak): <info@davidak.de> 
* [bastei](https://github.com/bastei)
* [Peter Hedlund](https://github.com/phedlund): <support@peterandlinda.com>
* [benediktb](https://github.com/benediktb)
* [Maik Kulbe](https://github.com/mkzero)
* [s17t.net](https://github.com/s17t): <mail+github@s17t.net>
* [John Kristensen](https://github.com/jerrykan)
* [Lutz Schildt](https://github.com/lsmooth): <ls@lsmooth.de>
* [Christopher](https://github.com/Kondou-ger): <kondou@ts.unde.re>
* [Xemle](https://github.com/xemle): <xemle@phtagr.org>
* [Blaimi](https://github.com/Blaimi)
* [Davide Saurino](https://github.com/sub): <davide.saurino@alcacoop.it>
* [Repat](http://repat.de/)
* [David Luhmer](https://github.com/David-Development)
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-21 04:00:42 +0000
ass="cm"> * packet is wrong but the others are correct. * @CIP_JUMBO_PAYLOAD: Only for in-stream. The number of data blocks in an * packet is larger than IEC 61883-6 defines. Current implementation * allows 5 times as large as IEC 61883-6 defines. */ enum cip_flags { CIP_NONBLOCKING = 0x00, CIP_BLOCKING = 0x01, CIP_SYNC_TO_DEVICE = 0x02, CIP_EMPTY_WITH_TAG0 = 0x04, CIP_DBC_IS_END_EVENT = 0x08, CIP_WRONG_DBS = 0x10, CIP_SKIP_DBC_ZERO_CHECK = 0x20, CIP_SKIP_INIT_DBC_CHECK = 0x40, CIP_EMPTY_HAS_WRONG_DBC = 0x80, CIP_JUMBO_PAYLOAD = 0x100, }; /** * enum cip_sfc - supported Sampling Frequency Codes (SFCs) * @CIP_SFC_32000: 32,000 data blocks * @CIP_SFC_44100: 44,100 data blocks * @CIP_SFC_48000: 48,000 data blocks * @CIP_SFC_88200: 88,200 data blocks * @CIP_SFC_96000: 96,000 data blocks * @CIP_SFC_176400: 176,400 data blocks * @CIP_SFC_192000: 192,000 data blocks * @CIP_SFC_COUNT: the number of supported SFCs * * These values are used to show nominal Sampling Frequency Code in * Format Dependent Field (FDF) of AMDTP packet header. In IEC 61883-6:2002, * this code means the number of events per second. Actually the code * represents the number of data blocks transferred per second in an AMDTP * stream. * * In IEC 61883-6:2005, some extensions were added to support more types of * data such as 'One Bit LInear Audio', therefore the meaning of SFC became * different depending on the types. * * Currently our implementation is compatible with IEC 61883-6:2002. */ enum cip_sfc { CIP_SFC_32000 = 0, CIP_SFC_44100 = 1, CIP_SFC_48000 = 2, CIP_SFC_88200 = 3, CIP_SFC_96000 = 4, CIP_SFC_176400 = 5, CIP_SFC_192000 = 6, CIP_SFC_COUNT }; struct fw_unit; struct fw_iso_context; struct snd_pcm_substream; struct snd_pcm_runtime; enum amdtp_stream_direction { AMDTP_OUT_STREAM = 0, AMDTP_IN_STREAM }; struct amdtp_stream; typedef unsigned int (*amdtp_stream_process_data_blocks_t)( struct amdtp_stream *s, __be32 *buffer, unsigned int data_blocks, unsigned int *syt); struct amdtp_stream { struct fw_unit *unit; enum cip_flags flags; enum amdtp_stream_direction direction; struct mutex mutex; /* For packet processing. */ struct fw_iso_context *context; struct iso_packets_buffer buffer; int packet_index; /* For CIP headers. */ unsigned int source_node_id_field; unsigned int data_block_quadlets; unsigned int data_block_counter; unsigned int fmt; unsigned int fdf; /* quirk: fixed interval of dbc between previos/current packets. */ unsigned int tx_dbc_interval; /* quirk: indicate the value of dbc field in a first packet. */ unsigned int tx_first_dbc; /* Internal flags. */ enum cip_sfc sfc; unsigned int syt_interval; unsigned int transfer_delay; unsigned int data_block_state; unsigned int last_syt_offset; unsigned int syt_offset_state; /* For a PCM substream processing. */ struct snd_pcm_substream *pcm; struct tasklet_struct period_tasklet; unsigned int pcm_buffer_pointer; unsigned int pcm_period_pointer; bool pointer_flush; /* To wait for first packet. */ bool callbacked; wait_queue_head_t callback_wait; struct amdtp_stream *sync_slave; /* For backends to process data blocks. */ void *protocol; amdtp_stream_process_data_blocks_t process_data_blocks; }; int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit, enum amdtp_stream_direction dir, enum cip_flags flags, unsigned int fmt, amdtp_stream_process_data_blocks_t process_data_blocks, unsigned int protocol_size); void amdtp_stream_destroy(struct amdtp_stream *s); int amdtp_stream_set_parameters(struct amdtp_stream *s, unsigned int rate, unsigned int data_block_quadlets); unsigned int amdtp_stream_get_max_payload(struct amdtp_stream *s); int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed); void amdtp_stream_update(struct amdtp_stream *s); void amdtp_stream_stop(struct amdtp_stream *s); int amdtp_stream_add_pcm_hw_constraints(struct amdtp_stream *s, struct snd_pcm_runtime *runtime); void amdtp_stream_pcm_prepare(struct amdtp_stream *s); unsigned long amdtp_stream_pcm_pointer(struct amdtp_stream *s); void amdtp_stream_pcm_abort(struct amdtp_stream *s); extern const unsigned int amdtp_syt_intervals[CIP_SFC_COUNT]; extern const unsigned int amdtp_rate_table[CIP_SFC_COUNT]; /** * amdtp_stream_running - check stream is running or not * @s: the AMDTP stream * * If this function returns true, the stream is running. */ static inline bool amdtp_stream_running(struct amdtp_stream *s) { return !IS_ERR(s->context); } /** * amdtp_streaming_error - check for streaming error * @s: the AMDTP stream * * If this function returns true, the stream's packet queue has stopped due to * an asynchronous error. */ static inline bool amdtp_streaming_error(struct amdtp_stream *s) { return s->packet_index < 0; } /** * amdtp_stream_pcm_running - check PCM substream is running or not * @s: the AMDTP stream * * If this function returns true, PCM substream in the AMDTP stream is running. */ static inline bool amdtp_stream_pcm_running(struct amdtp_stream *s) { return !!s->pcm; } /** * amdtp_stream_pcm_trigger - start/stop playback from a PCM device * @s: the AMDTP stream * @pcm: the PCM device to be started, or %NULL to stop the current device * * Call this function on a running isochronous stream to enable the actual * transmission of PCM data. This function should be called from the PCM * device's .trigger callback. */ static inline void amdtp_stream_pcm_trigger(struct amdtp_stream *s, struct snd_pcm_substream *pcm) { ACCESS_ONCE(s->pcm) = pcm; } static inline bool cip_sfc_is_base_44100(enum cip_sfc sfc) { return sfc & 1; } static inline void amdtp_stream_set_sync(enum cip_flags sync_mode, struct amdtp_stream *master, struct amdtp_stream *slave) { if (sync_mode == CIP_SYNC_TO_DEVICE) { master->flags |= CIP_SYNC_TO_DEVICE; slave->flags |= CIP_SYNC_TO_DEVICE; master->sync_slave = slave; } else { master->flags &= ~CIP_SYNC_TO_DEVICE; slave->flags &= ~CIP_SYNC_TO_DEVICE; master->sync_slave = NULL; } slave->sync_slave = NULL; } /** * amdtp_stream_wait_callback - sleep till callbacked or timeout * @s: the AMDTP stream * @timeout: msec till timeout * * If this function return false, the AMDTP stream should be stopped. */ static inline bool amdtp_stream_wait_callback(struct amdtp_stream *s, unsigned int timeout) { return wait_event_timeout(s->callback_wait, s->callbacked == true, msecs_to_jiffies(timeout)) > 0; } #endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-21 04:00:41 +0000