From: Alexander E. Patrakov Date: Thu, 12 Jun 2014 10:34:22 +0000 (+0600) Subject: pcm: rate: add rewindable and forwardable callbacks X-Git-Tag: v1.0.28~5 X-Git-Url: https://git.alsa-project.org/?a=commitdiff_plain;h=614a66bb2a94ee64e37935fed7a0adc1e822dc2e;p=alsa-lib.git pcm: rate: add rewindable and forwardable callbacks This commit does not fix nonsense values returned by the rewind and forward callbacks. E.g., with period_size = 1024 and buffer_size = 4096, an attempt to rewind 1024 samples from the nearly-full buffer returns 4090. Due to these nonsense values, the current rate plugin should be treated as non-rewindable. That's why the new callbacks return 0. Signed-off-by: Alexander E. Patrakov Signed-off-by: Jaroslav Kysela --- diff --git a/src/pcm/pcm_rate.c b/src/pcm/pcm_rate.c index 2eb4b1b3..58ed842e 100644 --- a/src/pcm/pcm_rate.c +++ b/src/pcm/pcm_rate.c @@ -689,6 +689,16 @@ static int snd_pcm_rate_reset(snd_pcm_t *pcm) return 0; } +static snd_pcm_sframes_t snd_pcm_rate_rewindable(snd_pcm_t *pcm ATTRIBUTE_UNUSED) +{ + return 0; +} + +static snd_pcm_sframes_t snd_pcm_rate_forwardable(snd_pcm_t *pcm ATTRIBUTE_UNUSED) +{ + return 0; +} + static snd_pcm_sframes_t snd_pcm_rate_rewind(snd_pcm_t *pcm, snd_pcm_uframes_t frames) { snd_pcm_rate_t *rate = pcm->private_data; @@ -1221,7 +1231,9 @@ static const snd_pcm_fast_ops_t snd_pcm_rate_fast_ops = { .drop = snd_pcm_generic_drop, .drain = snd_pcm_rate_drain, .pause = snd_pcm_generic_pause, + .rewindable = snd_pcm_rate_rewindable, .rewind = snd_pcm_rate_rewind, + .forwardable = snd_pcm_rate_forwardable, .forward = snd_pcm_rate_forward, .resume = snd_pcm_generic_resume, .writei = snd_pcm_mmap_writei,