diff options
Diffstat (limited to 'sound/firewire/amdtp-stream.c')
| -rw-r--r-- | sound/firewire/amdtp-stream.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c index 65720ae866cb..453751e4fef8 100644 --- a/sound/firewire/amdtp-stream.c +++ b/sound/firewire/amdtp-stream.c @@ -271,12 +271,14 @@ EXPORT_SYMBOL(amdtp_stream_add_pcm_hw_constraints); * @s: the AMDTP stream to configure * @rate: the sample rate * @data_block_quadlets: the size of a data block in quadlet unit + * @pcm_frame_multiplier: the multiplier to compute the number of PCM frames by the number of AMDTP + * events. * * The parameters must be set before the stream is started, and must not be * changed while the stream is running. */ int amdtp_stream_set_parameters(struct amdtp_stream *s, unsigned int rate, - unsigned int data_block_quadlets) + unsigned int data_block_quadlets, unsigned int pcm_frame_multiplier) { unsigned int sfc; @@ -298,6 +300,8 @@ int amdtp_stream_set_parameters(struct amdtp_stream *s, unsigned int rate, if (s->flags & CIP_BLOCKING) s->transfer_delay += TICKS_PER_SECOND * s->syt_interval / rate; + s->pcm_frame_multiplier = pcm_frame_multiplier; + return 0; } EXPORT_SYMBOL(amdtp_stream_set_parameters); @@ -1032,16 +1036,25 @@ static inline void cancel_stream(struct amdtp_stream *s) } static void process_ctx_payloads(struct amdtp_stream *s, - const struct pkt_desc *descs, + const struct pkt_desc *desc, unsigned int count) { struct snd_pcm_substream *pcm; - unsigned int pcm_frames; + int i; pcm = READ_ONCE(s->pcm); - pcm_frames = s->process_ctx_payloads(s, descs, count, pcm); - if (pcm) - update_pcm_pointers(s, pcm, pcm_frames); + (void)s->process_ctx_payloads(s, desc, count, pcm); + + if (pcm) { + unsigned int data_block_count = 0; + + for (i = 0; i < count; ++i) { + data_block_count += desc->data_blocks; + desc = amdtp_stream_next_packet_desc(s, desc); + } + + update_pcm_pointers(s, pcm, data_block_count * s->pcm_frame_multiplier); + } } static void process_rx_packets(struct fw_iso_context *context, u32 tstamp, size_t header_length, |