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-rw-r--r--audio/spiceaudio.c327
1 files changed, 327 insertions, 0 deletions
diff --git a/audio/spiceaudio.c b/audio/spiceaudio.c
new file mode 100644
index 0000000000..51ba53a39d
--- /dev/null
+++ b/audio/spiceaudio.c
@@ -0,0 +1,327 @@
+#include "hw/hw.h"
+#include "qemu-timer.h"
+#include "ui/qemu-spice.h"
+
+#define AUDIO_CAP "spice"
+#include "audio.h"
+#include "audio_int.h"
+
+#define LINE_IN_SAMPLES 1024
+#define LINE_OUT_SAMPLES 1024
+
+typedef struct SpiceRateCtl {
+ int64_t start_ticks;
+ int64_t bytes_sent;
+} SpiceRateCtl;
+
+typedef struct SpiceVoiceOut {
+ HWVoiceOut hw;
+ SpicePlaybackInstance sin;
+ SpiceRateCtl rate;
+ int active;
+ uint32_t *frame;
+ uint32_t *fpos;
+ uint32_t fsize;
+} SpiceVoiceOut;
+
+typedef struct SpiceVoiceIn {
+ HWVoiceIn hw;
+ SpiceRecordInstance sin;
+ SpiceRateCtl rate;
+ int active;
+ uint32_t samples[LINE_IN_SAMPLES];
+} SpiceVoiceIn;
+
+static const SpicePlaybackInterface playback_sif = {
+ .base.type = SPICE_INTERFACE_PLAYBACK,
+ .base.description = "playback",
+ .base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR,
+ .base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR,
+};
+
+static const SpiceRecordInterface record_sif = {
+ .base.type = SPICE_INTERFACE_RECORD,
+ .base.description = "record",
+ .base.major_version = SPICE_INTERFACE_RECORD_MAJOR,
+ .base.minor_version = SPICE_INTERFACE_RECORD_MINOR,
+};
+
+static void *spice_audio_init (void)
+{
+ if (!using_spice) {
+ return NULL;
+ }
+ return &spice_audio_init;
+}
+
+static void spice_audio_fini (void *opaque)
+{
+ /* nothing */
+}
+
+static void rate_start (SpiceRateCtl *rate)
+{
+ memset (rate, 0, sizeof (*rate));
+ rate->start_ticks = qemu_get_clock (vm_clock);
+}
+
+static int rate_get_samples (struct audio_pcm_info *info, SpiceRateCtl *rate)
+{
+ int64_t now;
+ int64_t ticks;
+ int64_t bytes;
+ int64_t samples;
+
+ now = qemu_get_clock (vm_clock);
+ ticks = now - rate->start_ticks;
+ bytes = muldiv64 (ticks, info->bytes_per_second, get_ticks_per_sec ());
+ samples = (bytes - rate->bytes_sent) >> info->shift;
+ if (samples < 0 || samples > 65536) {
+ fprintf (stderr, "Resetting rate control (%" PRId64 " samples)\n", samples);
+ rate_start (rate);
+ samples = 0;
+ }
+ rate->bytes_sent += samples << info->shift;
+ return samples;
+}
+
+/* playback */
+
+static int line_out_init (HWVoiceOut *hw, struct audsettings *as)
+{
+ SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
+ struct audsettings settings;
+
+ settings.freq = SPICE_INTERFACE_PLAYBACK_FREQ;
+ settings.nchannels = SPICE_INTERFACE_PLAYBACK_CHAN;
+ settings.fmt = AUD_FMT_S16;
+ settings.endianness = AUDIO_HOST_ENDIANNESS;
+
+ audio_pcm_init_info (&hw->info, &settings);
+ hw->samples = LINE_OUT_SAMPLES;
+ out->active = 0;
+
+ out->sin.base.sif = &playback_sif.base;
+ qemu_spice_add_interface (&out->sin.base);
+ return 0;
+}
+
+static void line_out_fini (HWVoiceOut *hw)
+{
+ SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
+
+ spice_server_remove_interface (&out->sin.base);
+}
+
+static int line_out_run (HWVoiceOut *hw, int live)
+{
+ SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
+ int rpos, decr;
+ int samples;
+
+ if (!live) {
+ return 0;
+ }
+
+ decr = rate_get_samples (&hw->info, &out->rate);
+ decr = audio_MIN (live, decr);
+
+ samples = decr;
+ rpos = hw->rpos;
+ while (samples) {
+ int left_till_end_samples = hw->samples - rpos;
+ int len = audio_MIN (samples, left_till_end_samples);
+
+ if (!out->frame) {
+ spice_server_playback_get_buffer (&out->sin, &out->frame, &out->fsize);
+ out->fpos = out->frame;
+ }
+ if (out->frame) {
+ len = audio_MIN (len, out->fsize);
+ hw->clip (out->fpos, hw->mix_buf + rpos, len);
+ out->fsize -= len;
+ out->fpos += len;
+ if (out->fsize == 0) {
+ spice_server_playback_put_samples (&out->sin, out->frame);
+ out->frame = out->fpos = NULL;
+ }
+ }
+ rpos = (rpos + len) % hw->samples;
+ samples -= len;
+ }
+ hw->rpos = rpos;
+ return decr;
+}
+
+static int line_out_write (SWVoiceOut *sw, void *buf, int len)
+{
+ return audio_pcm_sw_write (sw, buf, len);
+}
+
+static int line_out_ctl (HWVoiceOut *hw, int cmd, ...)
+{
+ SpiceVoiceOut *out = container_of (hw, SpiceVoiceOut, hw);
+
+ switch (cmd) {
+ case VOICE_ENABLE:
+ if (out->active) {
+ break;
+ }
+ out->active = 1;
+ rate_start (&out->rate);
+ spice_server_playback_start (&out->sin);
+ break;
+ case VOICE_DISABLE:
+ if (!out->active) {
+ break;
+ }
+ out->active = 0;
+ if (out->frame) {
+ memset (out->fpos, 0, out->fsize << 2);
+ spice_server_playback_put_samples (&out->sin, out->frame);
+ out->frame = out->fpos = NULL;
+ }
+ spice_server_playback_stop (&out->sin);
+ break;
+ }
+ return 0;
+}
+
+/* record */
+
+static int line_in_init (HWVoiceIn *hw, struct audsettings *as)
+{
+ SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
+ struct audsettings settings;
+
+ settings.freq = SPICE_INTERFACE_RECORD_FREQ;
+ settings.nchannels = SPICE_INTERFACE_RECORD_CHAN;
+ settings.fmt = AUD_FMT_S16;
+ settings.endianness = AUDIO_HOST_ENDIANNESS;
+
+ audio_pcm_init_info (&hw->info, &settings);
+ hw->samples = LINE_IN_SAMPLES;
+ in->active = 0;
+
+ in->sin.base.sif = &record_sif.base;
+ qemu_spice_add_interface (&in->sin.base);
+ return 0;
+}
+
+static void line_in_fini (HWVoiceIn *hw)
+{
+ SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
+
+ spice_server_remove_interface (&in->sin.base);
+}
+
+static int line_in_run (HWVoiceIn *hw)
+{
+ SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
+ int num_samples;
+ int ready;
+ int len[2];
+ uint64_t delta_samp;
+ const uint32_t *samples;
+
+ if (!(num_samples = hw->samples - audio_pcm_hw_get_live_in (hw))) {
+ return 0;
+ }
+
+ delta_samp = rate_get_samples (&hw->info, &in->rate);
+ num_samples = audio_MIN (num_samples, delta_samp);
+
+ ready = spice_server_record_get_samples (&in->sin, in->samples, num_samples);
+ samples = in->samples;
+ if (ready == 0) {
+ static const uint32_t silence[LINE_IN_SAMPLES];
+ samples = silence;
+ ready = LINE_IN_SAMPLES;
+ }
+
+ num_samples = audio_MIN (ready, num_samples);
+
+ if (hw->wpos + num_samples > hw->samples) {
+ len[0] = hw->samples - hw->wpos;
+ len[1] = num_samples - len[0];
+ } else {
+ len[0] = num_samples;
+ len[1] = 0;
+ }
+
+ hw->conv (hw->conv_buf + hw->wpos, samples, len[0], &nominal_volume);
+
+ if (len[1]) {
+ hw->conv (hw->conv_buf, samples + len[0], len[1],
+ &nominal_volume);
+ }
+
+ hw->wpos = (hw->wpos + num_samples) % hw->samples;
+
+ return num_samples;
+}
+
+static int line_in_read (SWVoiceIn *sw, void *buf, int size)
+{
+ return audio_pcm_sw_read (sw, buf, size);
+}
+
+static int line_in_ctl (HWVoiceIn *hw, int cmd, ...)
+{
+ SpiceVoiceIn *in = container_of (hw, SpiceVoiceIn, hw);
+
+ switch (cmd) {
+ case VOICE_ENABLE:
+ if (in->active) {
+ break;
+ }
+ in->active = 1;
+ rate_start (&in->rate);
+ spice_server_record_start (&in->sin);
+ break;
+ case VOICE_DISABLE:
+ if (!in->active) {
+ break;
+ }
+ in->active = 0;
+ spice_server_record_stop (&in->sin);
+ break;
+ }
+ return 0;
+}
+
+static struct audio_option audio_options[] = {
+ { /* end of list */ },
+};
+
+static struct audio_pcm_ops audio_callbacks = {
+ .init_out = line_out_init,
+ .fini_out = line_out_fini,
+ .run_out = line_out_run,
+ .write = line_out_write,
+ .ctl_out = line_out_ctl,
+
+ .init_in = line_in_init,
+ .fini_in = line_in_fini,
+ .run_in = line_in_run,
+ .read = line_in_read,
+ .ctl_in = line_in_ctl,
+};
+
+struct audio_driver spice_audio_driver = {
+ .name = "spice",
+ .descr = "spice audio driver",
+ .options = audio_options,
+ .init = spice_audio_init,
+ .fini = spice_audio_fini,
+ .pcm_ops = &audio_callbacks,
+ .max_voices_out = 1,
+ .max_voices_in = 1,
+ .voice_size_out = sizeof (SpiceVoiceOut),
+ .voice_size_in = sizeof (SpiceVoiceIn),
+};
+
+void qemu_spice_audio_init (void)
+{
+ spice_audio_driver.can_be_default = 1;
+}
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