audio fixes (malc)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1133 c046a42c-6fe2-441c-8c8c-71466251a162

audio fixes (malc)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1133 c046a42c-6fe2-441c-8c8c-71466251a162
bellard
1 parent d7382233
Showing 8 changed files with 145 additions and 12 deletions
Makefile.target
audio/audio.c
audio/audio_int.h
audio/fmodaudio.c
audio/noaudio.c
audio/ossaudio.c
audio/wavaudio.c
hw/sb16.c
@@ -274,7 +274,7 @@ VL_OBJS=vl.o osdep.o block.o readline.o monitor.o pci.o console.o
 VL_OBJS+=block-cow.o block-qcow.o aes.o block-vmdk.o block-cloop.o
  
 SOUND_HW = sb16.o
-AUDIODRV = audio.o wavaudio.o
+AUDIODRV = audio.o noaudio.o wavaudio.o
 ifdef CONFIG_SDL
 AUDIODRV += sdlaudio.o
 endif
@@ -183,7 +183,6 @@ int pcm_hw_alloc_resources (HWVoice *hw)
     return 0;
 }
  
-
 void pcm_hw_fini (HWVoice *hw)
 {
     if (hw->active) {
@@ -786,6 +785,7 @@ static struct audio_output_driver *drvtab[] = {
 #ifdef CONFIG_SDL
     &sdl_output_driver,
 #endif
+    &no_output_driver,
 #ifdef USE_WAV_AUDIO
     &wav_output_driver,
 #endif
@@ -906,6 +906,6 @@ void AUD_init (void)
     register_savevm ("audio", 0, 1, audio_save, audio_load, NULL);
     if (!done) {
         dolog ("Can not initialize audio subsystem\n");
-        return;
+        voice_init (&no_output_driver);
     }
 }
@@ -55,6 +55,9 @@ typedef struct HWVoice {
     struct pcm_ops *pcm_ops;
 } HWVoice;
  
+extern struct pcm_ops no_pcm_ops;
+extern struct audio_output_driver no_output_driver;
+
 extern struct pcm_ops oss_pcm_ops;
 extern struct audio_output_driver oss_output_driver;
  
@@ -34,7 +34,6 @@ typedef struct FMODVoice {
     int channel;
 } FMODVoice;
  
-
 #define dolog(...) AUD_log ("fmod", __VA_ARGS__)
 #ifdef DEBUG
 #define ldebug(...) dolog (__VA_ARGS__)
+/*
+ * QEMU NULL audio output driver
+ * 
+ * Copyright (c) 2004 Vassili Karpov (malc)
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "vl.h"
+
+#include "audio/audio_int.h"
+
+typedef struct NoVoice {
+    HWVoice hw;
+    int64_t old_ticks;
+} NoVoice;
+
+#define dolog(...) AUD_log ("noaudio", __VA_ARGS__)
+#ifdef DEBUG
+#define ldebug(...) dolog (__VA_ARGS__)
+#else
+#define ldebug(...)
+#endif
+
+static void no_hw_run (HWVoice *hw)
+{
+    NoVoice *no = (NoVoice *) hw;
+    int rpos, live, decr, samples;
+    uint8_t *dst;
+    st_sample_t *src;
+    int64_t now = qemu_get_clock (vm_clock);
+    int64_t ticks = now - no->old_ticks;
+    int64_t bytes = (ticks * hw->bytes_per_second) / ticks_per_sec;
+
+    if (bytes > INT_MAX)
+        samples = INT_MAX >> hw->shift;
+    else
+        samples = bytes >> hw->shift;
+
+    live = pcm_hw_get_live (hw);
+    if (live <= 0)
+        return;
+
+    no->old_ticks = now;
+    decr = audio_MIN (live, samples);
+    samples = decr;
+    rpos = hw->rpos;
+    while (samples) {
+        int left_till_end_samples = hw->samples - rpos;
+        int convert_samples = audio_MIN (samples, left_till_end_samples);
+
+        src = advance (hw->mix_buf, rpos * sizeof (st_sample_t));
+        memset (src, 0, convert_samples * sizeof (st_sample_t));
+
+        rpos = (rpos + convert_samples) % hw->samples;
+        samples -= convert_samples;
+    }
+
+    pcm_hw_dec_live (hw, decr);
+    hw->rpos = rpos;
+}
+
+static int no_hw_write (SWVoice *sw, void *buf, int len)
+{
+    return pcm_hw_write (sw, buf, len);
+}
+
+static int no_hw_init (HWVoice *hw, int freq, int nchannels, audfmt_e fmt)
+{
+    NoVoice *no = (NoVoice *) hw;
+    hw->freq = freq;
+    hw->nchannels = nchannels;
+    hw->fmt = fmt;
+    hw->bufsize = 4096;
+    return 0;
+}
+
+static void no_hw_fini (HWVoice *hw)
+{
+    (void) hw;
+}
+
+static int no_hw_ctl (HWVoice *hw, int cmd, ...)
+{
+    (void) hw;
+    (void) cmd;
+    return 0;
+}
+
+static void *no_audio_init (void)
+{
+    return &no_audio_init;
+}
+
+static void no_audio_fini (void *opaque)
+{
+}
+
+struct pcm_ops no_pcm_ops = {
+    no_hw_init,
+    no_hw_fini,
+    no_hw_run,
+    no_hw_write,
+    no_hw_ctl
+};
+
+struct audio_output_driver no_output_driver = {
+    "none",
+    no_audio_init,
+    no_audio_fini,
+    &no_pcm_ops,
+    1,
+    1,
+    sizeof (NoVoice)
+};
@@ -40,7 +40,6 @@ typedef struct OSSVoice {
     int old_optr;
 } OSSVoice;
  
-
 #define dolog(...) AUD_log ("oss", __VA_ARGS__)
 #ifdef DEBUG
 #define ldebug(...) dolog (__VA_ARGS__)
@@ -371,9 +370,7 @@ static int oss_hw_init (HWVoice *hw, int freq, int nchannels, audfmt_e fmt)
         if (oss->pcm_buf == MAP_FAILED) {
             dolog ("Failed to mmap OSS device\nReason: %s\n",
                    errstr ());
-        }
-
-        for (;;) {
+        } else for (;;) {
             int err;
             int trig = 0;
             if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
@@ -55,7 +55,6 @@ static void wav_hw_run (HWVoice *hw)
     int64_t now = qemu_get_clock (vm_clock);
     int64_t ticks = now - wav->old_ticks;
     int64_t bytes = (ticks * hw->bytes_per_second) / ticks_per_sec;
-    wav->old_ticks = now;
  
     if (bytes > INT_MAX)
         samples = INT_MAX >> hw->shift;
@@ -66,6 +65,7 @@ static void wav_hw_run (HWVoice *hw)
     if (live <= 0)
         return;
  
+    wav->old_ticks = now;
     decr = audio_MIN (live, samples);
     samples = decr;
     rpos = hw->rpos;
@@ -94,7 +94,6 @@ static int wav_hw_write (SWVoice *sw, void *buf, int len)
     return pcm_hw_write (sw, buf, len);
 }
  
-
 /* VICE code: Store number as little endian. */
 static void le_store (uint8_t *buf, uint32_t val, int len)
 {
@@ -145,6 +144,8 @@ static int wav_hw_init (HWVoice *hw, int freq, int nchannels, audfmt_e fmt)
     if (!wav->f) {
         dolog ("failed to open wave file `%s'\nReason: %s\n",
                conf.wav_path, strerror (errno));
+        qemu_free (wav->pcm_buf);
+        wav->pcm_buf = NULL;
         return -1;
     }
  
@@ -175,6 +176,9 @@ static void wav_hw_fini (HWVoice *hw)
  
     fclose (wav->f);
     wav->f = NULL;
+
+    qemu_free (wav->pcm_buf);
+    wav->pcm_buf = NULL;
 }
  
 static int wav_hw_ctl (HWVoice *hw, int cmd, ...)
@@ -640,8 +640,8 @@ static void complete (SB16State *s)
                     s->freq = 11025;
                 samples = dsp_get_lohi (s);
                 bytes = samples << s->fmt_stereo << (s->fmt_bits == 16);
-                ticks = ticks_per_sec / (s->freq / bytes);
-                if (ticks < ticks_per_sec / 1024)
+                ticks = bytes ? (ticks_per_sec / (s->freq / bytes)) : 0;
+                if (!bytes || ticks < ticks_per_sec / 1024)
                     pic_set_irq (s->irq, 1);
                 else
                     qemu_mod_timer (s->aux_ts, qemu_get_clock (vm_clock) + ticks);