Add support for the Opus codec

Signed-off-by: Jeremy White <jwhite@codeweavers.com>

14 files changed, 188 insertions, 87 deletions

diff --git a/client/audio_channels.h b/client/audio_channels.h
index d7b81e75..fdb4dc93 100644
--- a/client/audio_channels.h
+++ b/client/audio_channels.h
@@ -72,7 +72,6 @@ public:
     static ChannelFactory& Factory();
 
 protected:
-    virtual void on_connect();
     virtual void on_disconnect();
 
 private:
@@ -85,6 +84,8 @@ private:
     virtual void remove_event_source(EventSources::Trigger& event_source);
     virtual void push_frame(uint8_t *frame);
 
+    void set_desired_mode(int frequency);
+    void send_record_mode();
     void send_start_mark();
     void release_message(RecordSamplesMessage *message);
     RecordSamplesMessage * get_message();
diff --git a/client/audio_devices.h b/client/audio_devices.h
index a1da1f72..111c3667 100644
--- a/client/audio_devices.h
+++ b/client/audio_devices.h
@@ -27,10 +27,6 @@ public:
     virtual bool abort() = 0;
     virtual void stop() = 0;
     virtual uint32_t get_delay_ms() = 0;
-
-    enum {
-        FRAME_SIZE = 256,
-    };
 };
 
 class WaveRecordAbstract {
@@ -42,10 +38,6 @@ public:
     virtual void start() = 0;
     virtual void stop() = 0;
     virtual bool abort() = 0;
-
-    enum {
-        FRAME_SIZE = 256,
-    };
 };
 
 #endif
diff --git a/client/platform.h b/client/platform.h
index 913bcde4..0a88f06b 100644
--- a/client/platform.h
+++ b/client/platform.h
@@ -68,10 +68,12 @@ public:
     static WaveRecordAbstract* create_recorder(RecordClient& client,
                                                uint32_t sampels_per_sec,
                                                uint32_t bits_per_sample,
-                                               uint32_t channels);
+                                               uint32_t channels,
+                                               uint32_t frame_size);
     static WavePlaybackAbstract* create_player(uint32_t sampels_per_sec,
                                                uint32_t bits_per_sample,
-                                               uint32_t channels);
+                                               uint32_t channels,
+                                               uint32_t frame_size);
 
     enum {
         SCROLL_LOCK_MODIFIER_SHIFT,
diff --git a/client/playback_channel.cpp b/client/playback_channel.cpp
index 173c94a6..9f8c334c 100644
--- a/client/playback_channel.cpp
+++ b/client/playback_channel.cpp
@@ -168,8 +168,10 @@ PlaybackChannel::PlaybackChannel(RedClient& client, uint32_t id)
 
     handler->set_handler(SPICE_MSG_PLAYBACK_MODE, &PlaybackChannel::handle_mode);
 
-    if (snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_CELT_0_5_1))
+    if (snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_CELT_0_5_1, SND_CODEC_ANY_FREQUENCY))
         set_capability(SPICE_PLAYBACK_CAP_CELT_0_5_1);
+    if (snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_OPUS, SND_CODEC_ANY_FREQUENCY))
+        set_capability(SPICE_PLAYBACK_CAP_OPUS);
 }
 
 void PlaybackChannel::clear()
@@ -206,7 +208,7 @@ void PlaybackChannel::set_data_handler()
 
     if (_mode == SPICE_AUDIO_DATA_MODE_RAW) {
         handler->set_handler(SPICE_MSG_PLAYBACK_DATA, &PlaybackChannel::handle_raw_data);
-    } else if (snd_codec_is_capable(_mode)) {
+    } else if (snd_codec_is_capable(_mode, SND_CODEC_ANY_FREQUENCY)) {
         handler->set_handler(SPICE_MSG_PLAYBACK_DATA, &PlaybackChannel::handle_compressed_data);
     } else {
         THROW("invalid mode");
@@ -218,7 +220,7 @@ void PlaybackChannel::handle_mode(RedPeer::InMessage* message)
 {
     SpiceMsgPlaybackMode* playback_mode = (SpiceMsgPlaybackMode*)message->data();
     if (playback_mode->mode != SPICE_AUDIO_DATA_MODE_RAW
-        && !snd_codec_is_capable(playback_mode->mode) ) {
+        && !snd_codec_is_capable(playback_mode->mode, SND_CODEC_ANY_FREQUENCY) ) {
         THROW("invalid mode");
     }
 
@@ -266,9 +268,16 @@ void PlaybackChannel::handle_start(RedPeer::InMessage* message)
         }
         int bits_per_sample = 16;
         int frame_size = SND_CODEC_MAX_FRAME_SIZE;
+
+        if (_mode != SPICE_AUDIO_DATA_MODE_RAW) {
+            if (snd_codec_create(&_codec, _mode, start->frequency, SND_CODEC_DECODE) != SND_CODEC_OK)
+                THROW("create decoder");
+            frame_size = snd_codec_frame_size(_codec);
+        }
+
         try {
             _wave_player = Platform::create_player(start->frequency, bits_per_sample,
-                                                   start->channels);
+                                                   start->channels, frame_size);
         } catch (...) {
             LOG_WARN("create player failed");
             //todo: support disconnecting single channel
@@ -276,12 +285,6 @@ void PlaybackChannel::handle_start(RedPeer::InMessage* message)
             return;
         }
 
-        if (_mode != SPICE_AUDIO_DATA_MODE_RAW) {
-            if (snd_codec_create(&_codec, _mode, start->frequency, SND_CODEC_DECODE) != SND_CODEC_OK)
-                THROW("create decoder");
-            frame_size = snd_codec_frame_size(_codec);
-        }
-
         _frame_bytes = frame_size * start->channels * bits_per_sample / 8;
     }
     _playing = true;
diff --git a/client/record_channel.cpp b/client/record_channel.cpp
index 2870f62f..047cdd0b 100644
--- a/client/record_channel.cpp
+++ b/client/record_channel.cpp
@@ -87,8 +87,10 @@ RecordChannel::RecordChannel(RedClient& client, uint32_t id)
 
     handler->set_handler(SPICE_MSG_RECORD_START, &RecordChannel::handle_start);
 
-    if (snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_CELT_0_5_1))
+    if (snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_CELT_0_5_1, SND_CODEC_ANY_FREQUENCY))
         set_capability(SPICE_RECORD_CAP_CELT_0_5_1);
+    if (snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_OPUS, SND_CODEC_ANY_FREQUENCY))
+        set_capability(SPICE_RECORD_CAP_OPUS);
 }
 
 RecordChannel::~RecordChannel(void)
@@ -107,16 +109,23 @@ bool RecordChannel::abort(void)
     return (!_wave_recorder || _wave_recorder->abort()) && RedChannel::abort();
 }
 
-void RecordChannel::on_connect()
+void RecordChannel::set_desired_mode(int frequency)
 {
-    Message* message = new Message(SPICE_MSGC_RECORD_MODE);
-    SpiceMsgcRecordMode mode;
-    mode.time = get_mm_time();
-    if (snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_CELT_0_5_1) &&
+    if (snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_OPUS, frequency) &&
+      test_capability(SPICE_RECORD_CAP_OPUS))
+          _mode = SPICE_AUDIO_DATA_MODE_OPUS;
+    else if (snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_CELT_0_5_1, frequency) &&
       test_capability(SPICE_RECORD_CAP_CELT_0_5_1))
           _mode = SPICE_AUDIO_DATA_MODE_CELT_0_5_1;
       else
           _mode = SPICE_AUDIO_DATA_MODE_RAW;
+}
+
+void RecordChannel::send_record_mode()
+{
+    Message* message = new Message(SPICE_MSGC_RECORD_MODE);
+    SpiceMsgcRecordMode mode;
+    mode.time = get_mm_time();
     mode.mode = _mode;
     _marshallers->msgc_record_mode(message->marshaller(), &mode);
     post_message(message);
@@ -153,24 +162,29 @@ void RecordChannel::handle_start(RedPeer::InMessage* message)
         THROW("unexpected number of channels");
     }
 
+    set_desired_mode(start->frequency);
+
+    int frame_size = SND_CODEC_MAX_FRAME_SIZE;
+    if (_mode != SPICE_AUDIO_DATA_MODE_RAW) {
+        if (snd_codec_create(&_codec, _mode, start->frequency, SND_CODEC_ENCODE) != SND_CODEC_OK)
+            THROW("create encoder failed");
+        frame_size = snd_codec_frame_size(_codec);
+    }
+
     int bits_per_sample = 16;
     try {
         _wave_recorder = Platform::create_recorder(*this, start->frequency,
                                                    bits_per_sample,
-                                                   start->channels);
+                                                   start->channels,
+                                                   frame_size);
     } catch (...) {
         LOG_WARN("create recorder failed");
         return;
     }
 
-    int frame_size = SND_CODEC_MAX_FRAME_SIZE;
-    if (_mode != SPICE_AUDIO_DATA_MODE_RAW) {
-        if (snd_codec_create(&_codec, _mode, start->frequency, SND_CODEC_ENCODE) != SND_CODEC_OK)
-            THROW("create encoder failed");
-        frame_size = snd_codec_frame_size(_codec);
-    }
     _frame_bytes = frame_size * bits_per_sample * start->channels / 8;
 
+    send_record_mode();
     send_start_mark();
     _wave_recorder->start();
 }
@@ -237,7 +251,6 @@ void RecordChannel::remove_event_source(EventSources::Trigger& event_source)
 void RecordChannel::push_frame(uint8_t *frame)
 {
     RecordSamplesMessage *message;
-    ASSERT(_frame_bytes == FRAME_SIZE * 4);
     if (!(message = get_message())) {
         DBG(0, "blocked");
         return;
diff --git a/client/x11/platform.cpp b/client/x11/platform.cpp
index b8563b3f..bb8704c4 100644
--- a/client/x11/platform.cpp
+++ b/client/x11/platform.cpp
@@ -3433,16 +3433,18 @@ void Platform::reset_cursor_pos()
 WaveRecordAbstract* Platform::create_recorder(RecordClient& client,
                                               uint32_t sampels_per_sec,
                                               uint32_t bits_per_sample,
-                                              uint32_t channels)
+                                              uint32_t channels,
+                                              uint32_t frame_size)
 {
-    return new WaveRecorder(client, sampels_per_sec, bits_per_sample, channels);
+    return new WaveRecorder(client, sampels_per_sec, bits_per_sample, channels, frame_size);
 }
 
 WavePlaybackAbstract* Platform::create_player(uint32_t sampels_per_sec,
                                               uint32_t bits_per_sample,
-                                              uint32_t channels)
+                                              uint32_t channels,
+                                              uint32_t frame_size)
 {
-    return new WavePlayer(sampels_per_sec, bits_per_sample, channels);
+    return new WavePlayer(sampels_per_sec, bits_per_sample, channels, frame_size);
 }
 
 void XPlatform::on_focus_in()
diff --git a/client/x11/playback.cpp b/client/x11/playback.cpp
index 5fa7e182..035d6de8 100644
--- a/client/x11/playback.cpp
+++ b/client/x11/playback.cpp
@@ -24,12 +24,12 @@
 
 #define REING_SIZE_MS 300
 
-WavePlayer::WavePlayer(uint32_t sampels_per_sec, uint32_t bits_per_sample, uint32_t channels)
+WavePlayer::WavePlayer(uint32_t sampels_per_sec, uint32_t bits_per_sample, uint32_t channels, uint32_t frame_size)
     : _pcm (NULL)
     , _hw_params (NULL)
     , _sw_params (NULL)
 {
-    if (!init(sampels_per_sec, bits_per_sample, channels)) {
+    if (!init(sampels_per_sec, bits_per_sample, channels, frame_size)) {
         cleanup();
         THROW("failed");
     }
@@ -57,9 +57,9 @@ WavePlayer::~WavePlayer()
 
 bool WavePlayer::init(uint32_t sampels_per_sec,
                       uint32_t bits_per_sample,
-                      uint32_t channels)
+                      uint32_t channels,
+                      uint32_t frame_size)
 {
-    const int frame_size = WavePlaybackAbstract::FRAME_SIZE;
     const char* pcm_device = "default";
     snd_pcm_format_t format;
     int err;
@@ -75,6 +75,7 @@ bool WavePlayer::init(uint32_t sampels_per_sec,
         return false;
     }
     _sampels_per_ms = sampels_per_sec / 1000;
+    _frame_size = frame_size;
 
     if ((err = snd_pcm_open(&_pcm, pcm_device, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK)) < 0) {
         LOG_ERROR("cannot open audio playback device %s %s", pcm_device, snd_strerror(err));
@@ -183,14 +184,14 @@ bool WavePlayer::init(uint32_t sampels_per_sec,
 
 bool WavePlayer::write(uint8_t* frame)
 {
-    snd_pcm_sframes_t ret = snd_pcm_writei(_pcm, frame, WavePlaybackAbstract::FRAME_SIZE);
+    snd_pcm_sframes_t ret = snd_pcm_writei(_pcm, frame, _frame_size);
     if (ret < 0) {
         if (ret == -EAGAIN) {
             return false;
         }
         DBG(0, "err %s", snd_strerror(-ret));
         if (snd_pcm_recover(_pcm, ret, 1) == 0) {
-            snd_pcm_writei(_pcm, frame, WavePlaybackAbstract::FRAME_SIZE);
+            snd_pcm_writei(_pcm, frame, _frame_size);
         }
     }
     return true;
diff --git a/client/x11/playback.h b/client/x11/playback.h
index 27ef9ed7..383f02d3 100644
--- a/client/x11/playback.h
+++ b/client/x11/playback.h
@@ -25,7 +25,7 @@
 
 class WavePlayer: public WavePlaybackAbstract {
 public:
-    WavePlayer(uint32_t sampels_per_sec, uint32_t bits_per_sample, uint32_t channels);
+    WavePlayer(uint32_t sampels_per_sec, uint32_t bits_per_sample, uint32_t channels, uint32_t frame_size);
     virtual ~WavePlayer();
 
     virtual bool write(uint8_t* frame);
@@ -34,7 +34,7 @@ public:
     virtual uint32_t get_delay_ms();
 
 private:
-    bool init(uint32_t sampels_per_sec, uint32_t bits_per_sample, uint32_t channel);
+    bool init(uint32_t sampels_per_sec, uint32_t bits_per_sample, uint32_t channel, uint32_t frame_size);
     void cleanup();
 
 private:
@@ -42,6 +42,7 @@ private:
     snd_pcm_hw_params_t* _hw_params;
     snd_pcm_sw_params_t* _sw_params;
     uint32_t _sampels_per_ms;
+    uint32_t _frame_size;
 };
 
 #endif
diff --git a/client/x11/record.cpp b/client/x11/record.cpp
index 535a8c9e..32c0af7f 100644
--- a/client/x11/record.cpp
+++ b/client/x11/record.cpp
@@ -48,18 +48,19 @@ void WaveRecorder::EventTrigger::on_event()
 WaveRecorder::WaveRecorder(Platform::RecordClient& client,
                            uint32_t sampels_per_sec,
                            uint32_t bits_per_sample,
-                           uint32_t channels)
+                           uint32_t channels,
+                           uint32_t frame_size)
     : _client (client)
     , _pcm (NULL)
     , _hw_params (NULL)
     , _sw_params (NULL)
     , _sample_bytes (bits_per_sample * channels / 8)
-    , _frame (new uint8_t[_sample_bytes * WaveRecordAbstract::FRAME_SIZE])
+    , _frame (new uint8_t[_sample_bytes * frame_size])
     , _frame_pos (_frame)
-    , _frame_end (_frame + _sample_bytes * WaveRecordAbstract::FRAME_SIZE)
+    , _frame_end (_frame + _sample_bytes * frame_size)
     , _event_trigger (NULL)
 {
-    if (!init(sampels_per_sec, bits_per_sample, channels)) {
+    if (!init(sampels_per_sec, bits_per_sample, channels, frame_size)) {
         cleanup();
         THROW("failed");
     }
@@ -93,13 +94,15 @@ void WaveRecorder::cleanup()
 
 bool WaveRecorder::init(uint32_t sampels_per_sec,
                         uint32_t bits_per_sample,
-                        uint32_t channels)
+                        uint32_t channels,
+                        uint32_t frame_size)
 {
-    const int frame_size = WaveRecordAbstract::FRAME_SIZE;
     const char* pcm_device = "default";
     snd_pcm_format_t format;
     int err;
 
+    _frame_size = frame_size;
+
     switch (bits_per_sample) {
     case 8:
         format = SND_PCM_FORMAT_S8;
diff --git a/client/x11/record.h b/client/x11/record.h
index 91410962..9470791f 100644
--- a/client/x11/record.h
+++ b/client/x11/record.h
@@ -29,7 +29,8 @@ public:
     WaveRecorder(Platform::RecordClient& client,
                  uint32_t sampels_per_sec,
                  uint32_t bits_per_sample,
-                 uint32_t channels);
+                 uint32_t channels,
+                 uint32_t frame_size);
     virtual ~WaveRecorder();
 
     virtual void start();
@@ -39,7 +40,8 @@ public:
 private:
     bool init(uint32_t sampels_per_sec,
               uint32_t bits_per_sample,
-              uint32_t channels);
+              uint32_t channels,
+              uint32_t frame_size);
     void cleanup();
     void on_event();
 
@@ -49,6 +51,7 @@ private:
     snd_pcm_hw_params_t* _hw_params;
     snd_pcm_sw_params_t* _sw_params;
     uint32_t _sample_bytes;
+    uint32_t _frame_size;
     uint8_t* _frame;
     uint8_t* _frame_pos;
     uint8_t* _frame_end;
diff --git a/server/snd_worker.c b/server/snd_worker.c
index f40fd658..7d52dede 100644
--- a/server/snd_worker.c
+++ b/server/snd_worker.c
@@ -156,12 +156,14 @@ struct SpicePlaybackState {
     struct SndWorker worker;
     SpicePlaybackInstance *sin;
     SpiceVolumeState volume;
+    uint32_t frequency;
 };
 
 struct SpiceRecordState {
     struct SndWorker worker;
     SpiceRecordInstance *sin;
     SpiceVolumeState volume;
+    uint32_t frequency;
 };
 
 typedef struct RecordChannel {
@@ -370,14 +372,27 @@ static int snd_record_handle_message(SndChannel *channel, size_t size, uint32_t
         return snd_record_handle_write((RecordChannel *)channel, size, message);
     case SPICE_MSGC_RECORD_MODE: {
         SpiceMsgcRecordMode *mode = (SpiceMsgcRecordMode *)message;
-        record_channel->mode = mode->mode;
+        SpiceRecordState *st = SPICE_CONTAINEROF(channel->worker, SpiceRecordState, worker);
         record_channel->mode_time = mode->time;
-        if (record_channel->mode != SPICE_AUDIO_DATA_MODE_RAW &&
-             ! snd_codec_is_capable(record_channel->mode)) {
-            spice_printerr("unsupported mode %d", record_channel->mode);
+        if (mode->mode != SPICE_AUDIO_DATA_MODE_RAW) {
+            if (snd_codec_is_capable(mode->mode, st->frequency)) {
+                if (snd_codec_create(&record_channel->codec, mode->mode, st->frequency, SND_CODEC_DECODE) == SND_CODEC_OK) {
+                    record_channel->mode = mode->mode;
+                } else {
+                    spice_printerr("create decoder failed");
+                    return FALSE;
+                }
+            }
+            else {
+                spice_printerr("unsupported mode %d", record_channel->mode);
+                return FALSE;
+            }
         }
+        else
+            record_channel->mode = mode->mode;
         break;
     }
+
     case SPICE_MSGC_RECORD_START_MARK: {
         SpiceMsgcRecordStartMark *mark = (SpiceMsgcRecordStartMark *)message;
         record_channel->start_time = mark->time;
@@ -615,6 +630,7 @@ static int snd_playback_send_latency(PlaybackChannel *playback_channel)
 static int snd_playback_send_start(PlaybackChannel *playback_channel)
 {
     SndChannel *channel = (SndChannel *)playback_channel;
+    SpicePlaybackState *st = SPICE_CONTAINEROF(channel->worker, SpicePlaybackState, worker);
     SpiceMsgPlaybackStart start;
 
     if (!snd_reset_send_data(channel, SPICE_MSG_PLAYBACK_START)) {
@@ -622,7 +638,7 @@ static int snd_playback_send_start(PlaybackChannel *playback_channel)
     }
 
     start.channels = SPICE_INTERFACE_PLAYBACK_CHAN;
-    start.frequency = SPICE_INTERFACE_PLAYBACK_FREQ;
+    start.frequency = st->frequency;
     spice_assert(SPICE_INTERFACE_PLAYBACK_FMT == SPICE_INTERFACE_AUDIO_FMT_S16);
     start.format = SPICE_AUDIO_FMT_S16;
     start.time = reds_get_mm_time();
@@ -656,6 +672,7 @@ static int snd_playback_send_ctl(PlaybackChannel *playback_channel)
 static int snd_record_send_start(RecordChannel *record_channel)
 {
     SndChannel *channel = (SndChannel *)record_channel;
+    SpiceRecordState *st = SPICE_CONTAINEROF(channel->worker, SpiceRecordState, worker);
     SpiceMsgRecordStart start;
 
     if (!snd_reset_send_data(channel, SPICE_MSG_RECORD_START)) {
@@ -663,7 +680,7 @@ static int snd_record_send_start(RecordChannel *record_channel)
     }
 
     start.channels = SPICE_INTERFACE_RECORD_CHAN;
-    start.frequency = SPICE_INTERFACE_RECORD_FREQ;
+    start.frequency = st->frequency;
     spice_assert(SPICE_INTERFACE_RECORD_FMT == SPICE_INTERFACE_AUDIO_FMT_S16);
     start.format = SPICE_AUDIO_FMT_S16;
     spice_marshall_msg_record_start(channel->send_data.marshaller, &start);
@@ -745,11 +762,13 @@ static int snd_playback_send_write(PlaybackChannel *playback_channel)
 
     if (playback_channel->mode == SPICE_AUDIO_DATA_MODE_RAW) {
         spice_marshaller_add_ref(channel->send_data.marshaller,
-                                 (uint8_t *)frame->samples, sizeof(frame->samples));
+                                 (uint8_t *)frame->samples,
+                                 snd_codec_frame_size(playback_channel->codec) * sizeof(frame->samples[0]));
     }
     else {
         int n = sizeof(playback_channel->encode_buf);
-        if (snd_codec_encode(playback_channel->codec, (uint8_t *) frame->samples, sizeof(frame->samples),
+        if (snd_codec_encode(playback_channel->codec, (uint8_t *) frame->samples,
+                                    snd_codec_frame_size(playback_channel->codec) * sizeof(frame->samples[0]),
                                     playback_channel->encode_buf, &n) != SND_CODEC_OK) {
             spice_printerr("encode failed");
             snd_disconnect_channel(channel);
@@ -1126,12 +1145,15 @@ void snd_set_playback_latency(RedClient *client, uint32_t latency)
     }
 }
 
-static int snd_desired_audio_mode(int client_can_celt)
+static int snd_desired_audio_mode(int frequency, int client_can_celt, int client_can_opus)
 {
     if (! playback_compression)
         return SPICE_AUDIO_DATA_MODE_RAW;
 
-    if (client_can_celt && snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_CELT_0_5_1))
+    if (client_can_opus && snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_OPUS, frequency))
+        return SPICE_AUDIO_DATA_MODE_OPUS;
+
+    if (client_can_celt && snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_CELT_0_5_1, frequency))
         return SPICE_AUDIO_DATA_MODE_CELT_0_5_1;
 
     return SPICE_AUDIO_DATA_MODE_RAW;
@@ -1199,10 +1221,12 @@ static void snd_set_playback_peer(RedChannel *channel, RedClient *client, RedsSt
 
     int client_can_celt = red_channel_client_test_remote_cap(playback_channel->base.channel_client,
                                           SPICE_PLAYBACK_CAP_CELT_0_5_1);
-    int desired_mode = snd_desired_audio_mode(client_can_celt);
+    int client_can_opus = red_channel_client_test_remote_cap(playback_channel->base.channel_client,
+                                          SPICE_PLAYBACK_CAP_OPUS);
+    int desired_mode = snd_desired_audio_mode(st->frequency, client_can_celt, client_can_opus);
     playback_channel->mode = SPICE_AUDIO_DATA_MODE_RAW;
     if (desired_mode != SPICE_AUDIO_DATA_MODE_RAW) {
-        if (snd_codec_create(&playback_channel->codec, desired_mode, SPICE_INTERFACE_PLAYBACK_FREQ, SND_CODEC_ENCODE) == SND_CODEC_OK) {
+        if (snd_codec_create(&playback_channel->codec, desired_mode, st->frequency, SND_CODEC_ENCODE) == SND_CODEC_OK) {
             playback_channel->mode = desired_mode;
         } else {
             spice_printerr("create encoder failed");
@@ -1340,6 +1364,54 @@ SPICE_GNUC_VISIBLE uint32_t spice_server_record_get_samples(SpiceRecordInstance
     return len;
 }
 
+SPICE_GNUC_VISIBLE uint32_t spice_server_get_best_playback_rate(SpicePlaybackInstance *sin)
+{
+    int client_can_opus = TRUE;
+    if (sin && sin->st->worker.connection) {
+        SndChannel *channel = sin->st->worker.connection;
+        PlaybackChannel *playback_channel = SPICE_CONTAINEROF(channel, PlaybackChannel, base);
+        client_can_opus = red_channel_client_test_remote_cap(playback_channel->base.channel_client,
+                                          SPICE_PLAYBACK_CAP_OPUS);
+    }
+
+    if (client_can_opus && snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_OPUS, SND_CODEC_ANY_FREQUENCY))
+        return SND_CODEC_OPUS_PLAYBACK_FREQ;
+
+    return SND_CODEC_CELT_PLAYBACK_FREQ;
+}
+
+SPICE_GNUC_VISIBLE void spice_server_set_playback_rate(SpicePlaybackInstance *sin, uint32_t frequency)
+{
+    RedChannel *channel = sin->st->worker.base_channel;
+    sin->st->frequency = frequency;
+    if (channel && snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_OPUS, frequency))
+        red_channel_set_cap(channel, SPICE_PLAYBACK_CAP_OPUS);
+}
+
+SPICE_GNUC_VISIBLE uint32_t spice_server_get_best_record_rate(SpiceRecordInstance *sin)
+{
+    int client_can_opus = TRUE;
+    if (sin && sin->st->worker.connection) {
+        SndChannel *channel = sin->st->worker.connection;
+        RecordChannel *record_channel = SPICE_CONTAINEROF(channel, RecordChannel, base);
+        client_can_opus = red_channel_client_test_remote_cap(record_channel->base.channel_client,
+                                          SPICE_RECORD_CAP_OPUS);
+    }
+
+    if (client_can_opus && snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_OPUS, SND_CODEC_ANY_FREQUENCY))
+        return SND_CODEC_OPUS_PLAYBACK_FREQ;
+
+    return SND_CODEC_CELT_PLAYBACK_FREQ;
+}
+
+SPICE_GNUC_VISIBLE void spice_server_set_record_rate(SpiceRecordInstance *sin, uint32_t frequency)
+{
+    RedChannel *channel = sin->st->worker.base_channel;
+    sin->st->frequency = frequency;
+    if (channel && snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_OPUS, frequency))
+        red_channel_set_cap(channel, SPICE_RECORD_CAP_OPUS);
+}
+
 static void on_new_record_channel(SndWorker *worker)
 {
     RecordChannel *record_channel = (RecordChannel *)worker->connection;
@@ -1386,17 +1458,7 @@ static void snd_set_record_peer(RedChannel *channel, RedClient *client, RedsStre
         return;
     }
 
-    int client_can_celt = red_channel_client_test_remote_cap(record_channel->base.channel_client,
-                                          SPICE_RECORD_CAP_CELT_0_5_1);
-    int desired_mode = snd_desired_audio_mode(client_can_celt);
     record_channel->mode = SPICE_AUDIO_DATA_MODE_RAW;
-    if (desired_mode != SPICE_AUDIO_DATA_MODE_RAW) {
-        if (snd_codec_create(&record_channel->codec, desired_mode, SPICE_INTERFACE_RECORD_FREQ, SND_CODEC_DECODE) == SND_CODEC_OK) {
-            record_channel->mode = desired_mode;
-        } else {
-            spice_printerr("create decoder failed");
-        }
-    }
 
     worker->connection = &record_channel->base;
 
@@ -1451,6 +1513,7 @@ void snd_attach_playback(SpicePlaybackInstance *sin)
     sin->st = spice_new0(SpicePlaybackState, 1);
     sin->st->sin = sin;
     playback_worker = &sin->st->worker;
+    sin->st->frequency = SND_CODEC_CELT_PLAYBACK_FREQ; /* Default to the legacy rate */
 
     // TODO: Make RedChannel base of worker? instead of assigning it to channel->data
     channel = red_channel_create_dummy(sizeof(RedChannel), SPICE_CHANNEL_PLAYBACK, 0);
@@ -1462,7 +1525,7 @@ void snd_attach_playback(SpicePlaybackInstance *sin)
     red_channel_register_client_cbs(channel, &client_cbs);
     red_channel_set_data(channel, playback_worker);
 
-    if (snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_CELT_0_5_1))
+    if (snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_CELT_0_5_1, SND_CODEC_ANY_FREQUENCY))
         red_channel_set_cap(channel, SPICE_PLAYBACK_CAP_CELT_0_5_1);
 
     red_channel_set_cap(channel, SPICE_PLAYBACK_CAP_VOLUME);
@@ -1481,6 +1544,7 @@ void snd_attach_record(SpiceRecordInstance *sin)
     sin->st = spice_new0(SpiceRecordState, 1);
     sin->st->sin = sin;
     record_worker = &sin->st->worker;
+    sin->st->frequency = SND_CODEC_CELT_PLAYBACK_FREQ; /* Default to the legacy rate */
 
     // TODO: Make RedChannel base of worker? instead of assigning it to channel->data
     channel = red_channel_create_dummy(sizeof(RedChannel), SPICE_CHANNEL_RECORD, 0);
@@ -1491,7 +1555,7 @@ void snd_attach_record(SpiceRecordInstance *sin)
     client_cbs.migrate = snd_record_migrate_channel_client;
     red_channel_register_client_cbs(channel, &client_cbs);
     red_channel_set_data(channel, record_worker);
-    if (snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_CELT_0_5_1))
+    if (snd_codec_is_capable(SPICE_AUDIO_DATA_MODE_CELT_0_5_1, SND_CODEC_ANY_FREQUENCY))
         red_channel_set_cap(channel, SPICE_RECORD_CAP_CELT_0_5_1);
     red_channel_set_cap(channel, SPICE_RECORD_CAP_VOLUME);
 
@@ -1544,9 +1608,12 @@ void snd_set_playback_compression(int on)
     for (; now; now = now->next) {
         if (now->base_channel->type == SPICE_CHANNEL_PLAYBACK && now->connection) {
             PlaybackChannel* playback = (PlaybackChannel*)now->connection;
-            int desired_mode = snd_desired_audio_mode(
-                    red_channel_client_test_remote_cap(now->connection->channel_client, SPICE_PLAYBACK_CAP_CELT_0_5_1)
-                    );
+            SpicePlaybackState *st = SPICE_CONTAINEROF(now, SpicePlaybackState, worker);
+            int client_can_celt = red_channel_client_test_remote_cap(playback->base.channel_client,
+                                    SPICE_PLAYBACK_CAP_CELT_0_5_1);
+            int client_can_opus = red_channel_client_test_remote_cap(playback->base.channel_client,
+                                    SPICE_PLAYBACK_CAP_OPUS);
+            int desired_mode = snd_desired_audio_mode(st->frequency, client_can_opus, client_can_celt);
             if (playback->mode != desired_mode) {
                 playback->mode = desired_mode;
                 snd_set_command(now->connection, SND_PLAYBACK_MODE_MASK);
diff --git a/server/spice-server.syms b/server/spice-server.syms
index 4f2dc375..21938112 100644
--- a/server/spice-server.syms
+++ b/server/spice-server.syms
@@ -145,3 +145,11 @@ SPICE_SERVER_0.12.4 {
 global:
     spice_server_set_agent_file_xfer;
 } SPICE_SERVER_0.12.3;
+
+SPICE_SERVER_0.12.5 {
+global:
+    spice_server_get_best_playback_rate;
+    spice_server_set_playback_rate;
+    spice_server_get_best_record_rate;
+    spice_server_set_record_rate;
+} SPICE_SERVER_0.12.4;
diff --git a/server/spice.h b/server/spice.h
index b6451121..c648a1d6 100644
--- a/server/spice.h
+++ b/server/spice.h
@@ -24,7 +24,7 @@
 #include <spice/vd_agent.h>
 #include <spice/macros.h>
 
-#define SPICE_SERVER_VERSION 0x000c04 /* release 0.12.4 */
+#define SPICE_SERVER_VERSION 0x000c05 /* release 0.12.5 */
 
 #ifdef SPICE_SERVER_INTERNAL
 #undef SPICE_GNUC_DEPRECATED
@@ -333,7 +333,7 @@ struct SpiceTabletInstance {
 
 #define SPICE_INTERFACE_PLAYBACK "playback"
 #define SPICE_INTERFACE_PLAYBACK_MAJOR 1
-#define SPICE_INTERFACE_PLAYBACK_MINOR 2
+#define SPICE_INTERFACE_PLAYBACK_MINOR 3
 typedef struct SpicePlaybackInterface SpicePlaybackInterface;
 typedef struct SpicePlaybackInstance SpicePlaybackInstance;
 typedef struct SpicePlaybackState SpicePlaybackState;
@@ -342,7 +342,7 @@ enum {
     SPICE_INTERFACE_AUDIO_FMT_S16 = 1,
 };
 
-#define SPICE_INTERFACE_PLAYBACK_FREQ  44100
+#define SPICE_INTERFACE_PLAYBACK_FREQ  48000
 #define SPICE_INTERFACE_PLAYBACK_CHAN  2
 #define SPICE_INTERFACE_PLAYBACK_FMT   SPICE_INTERFACE_AUDIO_FMT_S16
 
@@ -367,12 +367,12 @@ void spice_server_playback_set_mute(SpicePlaybackInstance *sin, uint8_t mute);
 
 #define SPICE_INTERFACE_RECORD "record"
 #define SPICE_INTERFACE_RECORD_MAJOR 2
-#define SPICE_INTERFACE_RECORD_MINOR 2
+#define SPICE_INTERFACE_RECORD_MINOR 3
 typedef struct SpiceRecordInterface SpiceRecordInterface;
 typedef struct SpiceRecordInstance SpiceRecordInstance;
 typedef struct SpiceRecordState SpiceRecordState;
 
-#define SPICE_INTERFACE_RECORD_FREQ  44100
+#define SPICE_INTERFACE_RECORD_FREQ  48000
 #define SPICE_INTERFACE_RECORD_CHAN  2
 #define SPICE_INTERFACE_RECORD_FMT   SPICE_INTERFACE_AUDIO_FMT_S16
 
@@ -393,6 +393,11 @@ void spice_server_record_set_volume(SpiceRecordInstance *sin,
                                     uint8_t nchannels, uint16_t *volume);
 void spice_server_record_set_mute(SpiceRecordInstance *sin, uint8_t mute);
 
+uint32_t spice_server_get_best_playback_rate(SpicePlaybackInstance *sin);
+void     spice_server_set_playback_rate(SpicePlaybackInstance *sin, uint32_t frequency);
+uint32_t spice_server_get_best_record_rate(SpiceRecordInstance *sin);
+void     spice_server_set_record_rate(SpiceRecordInstance *sin, uint32_t frequency);
+
 /* char device interfaces */
 
 #define SPICE_INTERFACE_CHAR_DEVICE "char_device"
diff --git a/spice-common b/spice-common
-Subproject c108e4ee8cb33218d9a64e25de9e79b63d23a8e
+Subproject 57ce430ccd66bd1ca2447c14503234cfb88e236