From 4433e7159fdf91e30e38321808ab947262067ea1 Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <mailroxas@gmail.com>
Date: Fri, 2 Nov 2018 18:43:39 +0200
Subject: support formats regardless of getcaps support

some alsa programs wont fallback to anything that would work natively.
this sort of sucks since some do, so we may end up doing pointless
transcoding.
---
 src/pcm.c | 28 ++++++++++++++++++++--------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/src/pcm.c b/src/pcm.c
index abf94ab..6f0106c 100644
--- a/src/pcm.c
+++ b/src/pcm.c
@@ -706,9 +706,7 @@ snd_pcm_hw_params_free(snd_pcm_hw_params_t *obj)
    free(obj);
 }
 
-struct _snd_pcm_format_mask {
-   snd_pcm_format_t supported[ARRAY_SIZE(SUPPORTED_FORMATS)];
-};
+struct _snd_pcm_format_mask { bool noop; };
 
 size_t
 snd_pcm_format_mask_sizeof(void)
@@ -719,17 +717,17 @@ snd_pcm_format_mask_sizeof(void)
 int
 snd_pcm_format_mask_test(const snd_pcm_format_mask_t *mask, snd_pcm_format_t val)
 {
-   for (size_t i = 0; i < ARRAY_SIZE(mask->supported) && mask->supported[i] != SND_PCM_FORMAT_UNKNOWN; ++i) {
-      if (mask->supported[i] == val)
+   for (size_t i = 0; i < ARRAY_SIZE(SUPPORTED_FORMATS); ++i) {
+      if (SUPPORTED_FORMATS[i].fmt == val)
          return true;
    }
+   WARNX("format `0x%x` not supported by yet", val);
    return false;
 }
 
 void
 snd_pcm_hw_params_get_format_mask(snd_pcm_hw_params_t *params, snd_pcm_format_mask_t *mask)
 {
-   if (mask) memcpy(mask->supported, params->limits.supported, sizeof(mask->supported));
 }
 
 int
@@ -740,16 +738,30 @@ snd_pcm_hw_params_test_format(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_p
    return (snd_pcm_format_mask_test(&mask, val) ? 0 : -1);
 }
 
+static bool
+has_native_support(snd_pcm_hw_params_t *params, snd_pcm_format_t val)
+{
+   for (size_t i = 0; i < ARRAY_SIZE(params->limits.supported) && params->limits.supported[i] != SND_PCM_FORMAT_UNKNOWN; ++i) {
+      if (params->limits.supported[i] == val)
+         return true;
+   }
+   return false;
+}
+
 int
 snd_pcm_hw_params_set_format(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t val)
 {
    const struct format_info *info;
-   if (!(info = format_info_for_format(val)))
+   if (!(info = format_info_for_format(val))) {
+      WARNX("format `0x%x` not supported yet", val);
       return -1;
+   }
 
    params->format = val;
    WARNX("%s", info->name);
-   params->needs_conversion = (snd_pcm_hw_params_test_format(pcm, params, val) != 0);
+
+   if ((params->needs_conversion = !has_native_support(params, val)))
+      WARNX1("format needs to be transcoded!");
 
    const struct sio_par old = params->par;
    params->par.bits = info->enc.bits;
-- 
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