[PATCH v4 10/24] wavaudio: port to the new audio backend api

["Kővágó, Zoltán" <dirty.ice.hu@gmail.com>]

Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com>
---

Notes:
    Changes from v3:
    
    * fix compilation on 32-bit targets

 audio/wavaudio.c | 54 ++++++++----------------------------------------
 1 file changed, 9 insertions(+), 45 deletions(-)

diff --git a/audio/wavaudio.c b/audio/wavaudio.c
index b6eeeb4e26..78af2f1338 100644
--- a/audio/wavaudio.c
+++ b/audio/wavaudio.c
@@ -36,52 +36,28 @@ typedef struct WAVVoiceOut {
     HWVoiceOut hw;
     FILE *f;
     int64_t old_ticks;
-    void *pcm_buf;
     int total_samples;
 } WAVVoiceOut;
 
-static size_t wav_run_out(HWVoiceOut *hw, size_t live)
+static size_t wav_write_out(HWVoiceOut *hw, void *buf, size_t len)
 {
     WAVVoiceOut *wav = (WAVVoiceOut *) hw;
-    size_t rpos, decr, samples;
-    uint8_t *dst;
-    struct st_sample *src;
     int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
     int64_t ticks = now - wav->old_ticks;
     int64_t bytes =
         muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND);
 
-    if (bytes > INT_MAX) {
-        samples = INT_MAX >> hw->info.shift;
-    }
-    else {
-        samples = bytes >> hw->info.shift;
-    }
-
+    bytes = MIN(bytes, len);
+    bytes = bytes >> hw->info.shift << hw->info.shift;
     wav->old_ticks = now;
-    decr = MIN (live, samples);
-    samples = decr;
-    rpos = hw->rpos;
-    while (samples) {
-        int left_till_end_samples = hw->samples - rpos;
-        int convert_samples = MIN (samples, left_till_end_samples);
-
-        src = hw->mix_buf + rpos;
-        dst = advance (wav->pcm_buf, rpos << hw->info.shift);
-
-        hw->clip (dst, src, convert_samples);
-        if (fwrite (dst, convert_samples << hw->info.shift, 1, wav->f) != 1) {
-            dolog ("wav_run_out: fwrite of %d bytes failed\nReaons: %s\n",
-                   convert_samples << hw->info.shift, strerror (errno));
-        }
 
-        rpos = (rpos + convert_samples) % hw->samples;
-        samples -= convert_samples;
-        wav->total_samples += convert_samples;
+    if (bytes && fwrite(buf, bytes, 1, wav->f) != 1) {
+        dolog("wav_write_out: fwrite of %" PRId64 " bytes failed\nReason: %s\n",
+              bytes, strerror(errno));
     }
 
-    hw->rpos = rpos;
-    return decr;
+    wav->total_samples += bytes >> hw->info.shift;
+    return bytes;
 }
 
 /* VICE code: Store number as little endian. */
@@ -137,13 +113,6 @@ static int wav_init_out(HWVoiceOut *hw, struct audsettings *as,
     audio_pcm_init_info (&hw->info, &wav_as);
 
     hw->samples = 1024;
-    wav->pcm_buf = audio_calloc(__func__, hw->samples, 1 << hw->info.shift);
-    if (!wav->pcm_buf) {
-        dolog("Could not allocate buffer (%zu bytes)\n",
-              hw->samples << hw->info.shift);
-        return -1;
-    }
-
     le_store (hdr + 22, hw->info.nchannels, 2);
     le_store (hdr + 24, hw->info.freq, 4);
     le_store (hdr + 28, hw->info.freq << (bits16 + stereo), 4);
@@ -153,8 +122,6 @@ static int wav_init_out(HWVoiceOut *hw, struct audsettings *as,
     if (!wav->f) {
         dolog ("Failed to open wave file `%s'\nReason: %s\n",
                wav_path, strerror(errno));
-        g_free (wav->pcm_buf);
-        wav->pcm_buf = NULL;
         return -1;
     }
 
@@ -208,9 +175,6 @@ static void wav_fini_out (HWVoiceOut *hw)
                wav->f, strerror (errno));
     }
     wav->f = NULL;
-
-    g_free (wav->pcm_buf);
-    wav->pcm_buf = NULL;
 }
 
 static int wav_ctl_out (HWVoiceOut *hw, int cmd, ...)
@@ -234,7 +198,7 @@ static void wav_audio_fini (void *opaque)
 static struct audio_pcm_ops wav_pcm_ops = {
     .init_out = wav_init_out,
     .fini_out = wav_fini_out,
-    .run_out  = wav_run_out,
+    .write    = wav_write_out,
     .ctl_out  = wav_ctl_out,
 };
 
-- 
2.23.0