[ALSA] ymfpci: add per-voice volume controls

YMFPCI driver
Implements mixer controls for the volume of each playback substream of
the main PCM device.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

1 files changed, 160 insertions, 72 deletions

diff --git a/sound/pci/ymfpci/ymfpci_main.c b/sound/pci/ymfpci/ymfpci_main.c
index d54f88a1b525..054836412dc4 100644
--- a/sound/pci/ymfpci/ymfpci_main.c
+++ b/sound/pci/ymfpci/ymfpci_main.c
@@ -321,6 +321,26 @@ static void snd_ymfpci_pcm_interrupt(ymfpci_t *chip, ymfpci_voice_t *voice)
                         snd_pcm_period_elapsed(ypcm->substream);
                         spin_lock(&chip->reg_lock);
                 }
+
+                if (unlikely(ypcm->update_pcm_vol)) {
+                        unsigned int subs = ypcm->substream->number;
+                        unsigned int next_bank = 1 - chip->active_bank;
+                        snd_ymfpci_playback_bank_t *bank;
+                        u32 volume;
+                        
+                        bank = &voice->bank[next_bank];
+                        volume = cpu_to_le32(chip->pcm_mixer[subs].left << 15);
+                        bank->left_gain_end = volume;
+                        if (ypcm->output_rear)
+                                bank->eff2_gain_end = volume;
+                        if (ypcm->voices[1])
+                                bank = &ypcm->voices[1]->bank[next_bank];
+                        volume = cpu_to_le32(chip->pcm_mixer[subs].right << 15);
+                        bank->right_gain_end = volume;
+                        if (ypcm->output_rear)
+                                bank->eff3_gain_end = volume;
+                        ypcm->update_pcm_vol--;
+                }
         }
         spin_unlock(&chip->reg_lock);
 }
@@ -451,87 +471,74 @@ static int snd_ymfpci_pcm_voice_alloc(ymfpci_pcm_t *ypcm, int voices)
         return 0;
 }
 
-static void snd_ymfpci_pcm_init_voice(ymfpci_voice_t *voice, int stereo,
-                                      int rate, int w_16, unsigned long addr,
-                                      unsigned int end,
-                                      int output_front, int output_rear)
+static void snd_ymfpci_pcm_init_voice(ymfpci_pcm_t *ypcm, unsigned int voiceidx,
+                                      snd_pcm_runtime_t *runtime,
+                                      int has_pcm_volume)
 {
+        ymfpci_voice_t *voice = ypcm->voices[voiceidx];
         u32 format;
-        u32 delta = snd_ymfpci_calc_delta(rate);
-        u32 lpfQ = snd_ymfpci_calc_lpfQ(rate);
-        u32 lpfK = snd_ymfpci_calc_lpfK(rate);
+        u32 delta = snd_ymfpci_calc_delta(runtime->rate);
+        u32 lpfQ = snd_ymfpci_calc_lpfQ(runtime->rate);
+        u32 lpfK = snd_ymfpci_calc_lpfK(runtime->rate);
         snd_ymfpci_playback_bank_t *bank;
         unsigned int nbank;
+        u32 vol_left, vol_right;
+        u8 use_left, use_right;
 
         snd_assert(voice != NULL, return);
-        format = (stereo ? 0x00010000 : 0) | (w_16 ? 0 : 0x80000000);
+        if (runtime->channels == 1) {
+                use_left = 1;
+                use_right = 1;
+        } else {
+                use_left = (voiceidx & 1) == 0;
+                use_right = !use_left;
+        }
+        if (has_pcm_volume) {
+                vol_left = cpu_to_le32(ypcm->chip->pcm_mixer
+                                       [ypcm->substream->number].left << 15);
+                vol_right = cpu_to_le32(ypcm->chip->pcm_mixer
+                                        [ypcm->substream->number].right << 15);
+        } else {
+                vol_left = cpu_to_le32(0x40000000);
+                vol_right = cpu_to_le32(0x40000000);
+        }
+        format = runtime->channels == 2 ? 0x00010000 : 0;
+        if (snd_pcm_format_width(runtime->format) == 8)
+                format |= 0x80000000;
+        if (runtime->channels == 2 && (voiceidx & 1) != 0)
+                format |= 1;
         for (nbank = 0; nbank < 2; nbank++) {
                 bank = &voice->bank[nbank];
+                memset(bank, 0, sizeof(*bank));
                 bank->format = cpu_to_le32(format);
-                bank->loop_default = 0;
-                bank->base = cpu_to_le32(addr);
-                bank->loop_start = 0;
-                bank->loop_end = cpu_to_le32(end);
-                bank->loop_frac = 0;
-                bank->eg_gain_end = cpu_to_le32(0x40000000);
+                bank->base = cpu_to_le32(runtime->dma_addr);
+                bank->loop_end = cpu_to_le32(ypcm->buffer_size);
                 bank->lpfQ = cpu_to_le32(lpfQ);
-                bank->status = 0;
-                bank->num_of_frames = 0;
-                bank->loop_count = 0;
-                bank->start = 0;
-                bank->start_frac = 0;
                 bank->delta =
                 bank->delta_end = cpu_to_le32(delta);
                 bank->lpfK =
                 bank->lpfK_end = cpu_to_le32(lpfK);
-                bank->eg_gain = cpu_to_le32(0x40000000);
-                bank->lpfD1 =
-                bank->lpfD2 = 0;
-
-                bank->left_gain = 
-                bank->right_gain =
-                bank->left_gain_end =
-                bank->right_gain_end =
-                bank->eff1_gain =
-                bank->eff2_gain =
-                bank->eff3_gain =
-                bank->eff1_gain_end =
-                bank->eff2_gain_end =
-                bank->eff3_gain_end = 0;
-
-                if (!stereo) {
-                        if (output_front) {
-                                bank->left_gain = 
+                bank->eg_gain =
+                bank->eg_gain_end = cpu_to_le32(0x40000000);
+
+                if (ypcm->output_front) {
+                        if (use_left) {
+                                bank->left_gain =
+                                bank->left_gain_end = vol_left;
+                        }
+                        if (use_right) {
                                 bank->right_gain =
-                                bank->left_gain_end =
-                                bank->right_gain_end = cpu_to_le32(0x40000000);
+                                bank->right_gain_end = vol_right;
                         }
-                        if (output_rear) {
+                }
+                if (ypcm->output_rear) {
+                        if (use_left) {
                                 bank->eff2_gain =
-                                bank->eff2_gain_end =
-                                bank->eff3_gain =
-                                bank->eff3_gain_end = cpu_to_le32(0x40000000);
-                        }
-                } else {
-                        if (output_front) {
-                                if ((voice->number & 1) == 0) {
-                                        bank->left_gain =
-                                        bank->left_gain_end = cpu_to_le32(0x40000000);
-                                } else {
-                                        bank->format |= cpu_to_le32(1);
-                                        bank->right_gain =
-                                        bank->right_gain_end = cpu_to_le32(0x40000000);
-                                }
+                                bank->eff2_gain_end = vol_left;
                         }
-                        if (output_rear) {
-                                if ((voice->number & 1) == 0) {
-                                        bank->eff3_gain =
-                                        bank->eff3_gain_end = cpu_to_le32(0x40000000);
-                                } else {
-                                        bank->format |= cpu_to_le32(1);
-                                        bank->eff2_gain =
-                                        bank->eff2_gain_end = cpu_to_le32(0x40000000);
-                                }
+                        if (use_right) {
+                                bank->eff3_gain =
+                                bank->eff3_gain_end = vol_right;
                         }
                 }
         }
@@ -613,7 +620,7 @@ static int snd_ymfpci_playback_hw_free(snd_pcm_substream_t * substream)
 
 static int snd_ymfpci_playback_prepare(snd_pcm_substream_t * substream)
 {
-        // ymfpci_t *chip = snd_pcm_substream_chip(substream);
+        ymfpci_t *chip = snd_pcm_substream_chip(substream);
         snd_pcm_runtime_t *runtime = substream->runtime;
         ymfpci_pcm_t *ypcm = runtime->private_data;
         unsigned int nvoice;
@@ -623,14 +630,8 @@ static int snd_ymfpci_playback_prepare(snd_pcm_substream_t * substream)
         ypcm->period_pos = 0;
         ypcm->last_pos = 0;
         for (nvoice = 0; nvoice < runtime->channels; nvoice++)
-                snd_ymfpci_pcm_init_voice(ypcm->voices[nvoice],
-                                          runtime->channels == 2,
-                                          runtime->rate,
-                                          snd_pcm_format_width(runtime->format) == 16,
-                                          runtime->dma_addr,
-                                          ypcm->buffer_size,
-                                          ypcm->output_front,
-                                          ypcm->output_rear);
+                snd_ymfpci_pcm_init_voice(ypcm, nvoice, runtime,
+                                          substream->pcm == chip->pcm);
         return 0;
 }
 
@@ -882,6 +883,7 @@ static int snd_ymfpci_playback_open(snd_pcm_substream_t * substream)
         ymfpci_t *chip = snd_pcm_substream_chip(substream);
         snd_pcm_runtime_t *runtime = substream->runtime;
         ymfpci_pcm_t *ypcm;
+        snd_kcontrol_t *kctl;
         int err;
         
         if ((err = snd_ymfpci_playback_open_1(substream)) < 0)
@@ -895,6 +897,10 @@ static int snd_ymfpci_playback_open(snd_pcm_substream_t * substream)
                 chip->rear_opened++;
         }
         spin_unlock_irq(&chip->reg_lock);
+
+        kctl = chip->pcm_mixer[substream->number].ctl;
+        kctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
+        snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_INFO, &kctl->id);
         return 0;
 }
 
@@ -987,6 +993,7 @@ static int snd_ymfpci_playback_close(snd_pcm_substream_t * substream)
 {
         ymfpci_t *chip = snd_pcm_substream_chip(substream);
         ymfpci_pcm_t *ypcm = substream->runtime->private_data;
+        snd_kcontrol_t *kctl;
 
         spin_lock_irq(&chip->reg_lock);
         if (ypcm->output_rear && chip->rear_opened > 0) {
@@ -994,6 +1001,9 @@ static int snd_ymfpci_playback_close(snd_pcm_substream_t * substream)
                 ymfpci_close_extension(chip);
         }
         spin_unlock_irq(&chip->reg_lock);
+        kctl = chip->pcm_mixer[substream->number].ctl;
+        kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
+        snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_INFO, &kctl->id);
         return snd_ymfpci_playback_close_1(substream);
 }
 
@@ -1665,6 +1675,66 @@ static snd_kcontrol_new_t snd_ymfpci_rear_shared __devinitdata = {
         .private_value = 2,
 };
 
+/*
+ * PCM voice volume
+ */
+
+static int snd_ymfpci_pcm_vol_info(snd_kcontrol_t *kcontrol,
+                                   snd_ctl_elem_info_t *uinfo)
+{
+        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+        uinfo->count = 2;
+        uinfo->value.integer.min = 0;
+        uinfo->value.integer.max = 0x8000;
+        return 0;
+}
+
+static int snd_ymfpci_pcm_vol_get(snd_kcontrol_t *kcontrol,
+                                  snd_ctl_elem_value_t *ucontrol)
+{
+        ymfpci_t *chip = snd_kcontrol_chip(kcontrol);
+        unsigned int subs = kcontrol->id.subdevice;
+
+        ucontrol->value.integer.value[0] = chip->pcm_mixer[subs].left;
+        ucontrol->value.integer.value[1] = chip->pcm_mixer[subs].right;
+        return 0;
+}
+
+static int snd_ymfpci_pcm_vol_put(snd_kcontrol_t *kcontrol,
+                                  snd_ctl_elem_value_t *ucontrol)
+{
+        ymfpci_t *chip = snd_kcontrol_chip(kcontrol);
+        unsigned int subs = kcontrol->id.subdevice;
+        snd_pcm_substream_t *substream;
+        unsigned long flags;
+
+        if (ucontrol->value.integer.value[0] != chip->pcm_mixer[subs].left ||
+            ucontrol->value.integer.value[1] != chip->pcm_mixer[subs].right) {
+                chip->pcm_mixer[subs].left = ucontrol->value.integer.value[0];
+                chip->pcm_mixer[subs].right = ucontrol->value.integer.value[1];
+
+                substream = (snd_pcm_substream_t *)kcontrol->private_value;
+                spin_lock_irqsave(&chip->voice_lock, flags);
+                if (substream->runtime && substream->runtime->private_data) {
+                        ymfpci_pcm_t *ypcm = substream->runtime->private_data;
+                        ypcm->update_pcm_vol = 2;
+                }
+                spin_unlock_irqrestore(&chip->voice_lock, flags);
+                return 1;
+        }
+        return 0;
+}
+
+static snd_kcontrol_new_t snd_ymfpci_pcm_volume __devinitdata = {
+        .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+        .name = "PCM Playback Volume",
+        .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+                SNDRV_CTL_ELEM_ACCESS_INACTIVE,
+        .info = snd_ymfpci_pcm_vol_info,
+        .get = snd_ymfpci_pcm_vol_get,
+        .put = snd_ymfpci_pcm_vol_put,
+};
+
 
 /*
  *  Mixer routines
@@ -1686,6 +1756,7 @@ int __devinit snd_ymfpci_mixer(ymfpci_t *chip, int rear_switch)
 {
         ac97_template_t ac97;
         snd_kcontrol_t *kctl;
+        snd_pcm_substream_t *substream;
         unsigned int idx;
         int err;
         static ac97_bus_ops_t ops = {
@@ -1739,6 +1810,23 @@ int __devinit snd_ymfpci_mixer(ymfpci_t *chip, int rear_switch)
                         return err;
         }
 
+        /* per-voice volume */
+        substream = chip->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
+        for (idx = 0; idx < 32; ++idx) {
+                kctl = snd_ctl_new1(&snd_ymfpci_pcm_volume, chip);
+                if (!kctl)
+                        return -ENOMEM;
+                kctl->id.device = chip->pcm->device;
+                kctl->id.subdevice = idx;
+                kctl->private_value = (unsigned long)substream;
+                if ((err = snd_ctl_add(chip->card, kctl)) < 0)
+                        return err;
+                chip->pcm_mixer[idx].left = 0x8000;
+                chip->pcm_mixer[idx].right = 0x8000;
+                chip->pcm_mixer[idx].ctl = kctl;
+                substream = substream->next;
+        }
+
         return 0;
 }