From 5ec99d48e489a7ae9db151ce7a5232d9a74f7cb4 Mon Sep 17 00:00:00 2001
From: Arun Raghavan <arun.raghavan@collabora.co.uk>
Date: Fri, 16 Aug 2013 15:56:51 +0530
Subject: Manage modem PCMs for mako in csd-daemon

Trying to manage them in PA while maintaining ordering with
libcsd-client calls is too fragile and seems to not be worth the effort.
---
 tools/mako/Android.mk   |  6 +++-
 tools/mako/csd-daemon.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 86 insertions(+), 1 deletion(-)

diff --git a/tools/mako/Android.mk b/tools/mako/Android.mk
index 8d04f20..5f3505f 100644
--- a/tools/mako/Android.mk
+++ b/tools/mako/Android.mk
@@ -12,8 +12,12 @@ LOCAL_MODULE_TAGS:=eng debug
 LOCAL_SRC_FILES := \
 	csd-daemon.c
 
+LOCAL_C_INCLUDES := \
+	external/pulseaudio/alsa-lib/include
+
 LOCAL_SHARED_LIBRARIES:= \
-	libdl
+	libdl \
+	libasound
 
 LOCAL_PRELINK_MODULE := false
 include $(BUILD_EXECUTABLE)
diff --git a/tools/mako/csd-daemon.c b/tools/mako/csd-daemon.c
index 955fd6e..61277ab 100644
--- a/tools/mako/csd-daemon.c
+++ b/tools/mako/csd-daemon.c
@@ -37,6 +37,8 @@
 #include <sys/socket.h>
 #include <sys/un.h>
 
+#include <asoundlib.h>
+
 #define DEBUG 1
 #include "common.h"
 
@@ -48,6 +50,8 @@ struct state {
     int rx_dev, tx_dev;
     int start_voice;
     int disable_device;
+
+    snd_pcm_t *play, *rec;
 };
 
 static struct state state;
@@ -161,6 +165,68 @@ static int init_daemon(void)
     return 0;
 }
 
+#define MODEM_PCM "hw:apq8064tablasnd,12"
+
+static int open_pcms(void)
+{
+    if (snd_pcm_open(&state.play, MODEM_PCM, SND_PCM_STREAM_PLAYBACK, 0) < 0) {
+        ERR("Could not open playback device\n");
+        return -1;
+    }
+
+    if (snd_pcm_open(&state.rec, MODEM_PCM, SND_PCM_STREAM_CAPTURE, 0) < 0) {
+        ERR("Could not open capture device\n");
+        return -1;
+    }
+
+    if (snd_pcm_set_params(state.play,
+                           SND_PCM_FORMAT_S16_LE,
+                           SND_PCM_ACCESS_RW_INTERLEAVED,
+                           1,
+                           8000,
+                           0,
+                           0) < 0) {
+        ERR("Could not set playback params\n");
+        return -1;
+    }
+
+    if (snd_pcm_set_params(state.rec,
+                           SND_PCM_FORMAT_S16_LE,
+                           SND_PCM_ACCESS_RW_INTERLEAVED,
+                           1,
+                           8000,
+                           0,
+                           0) < 0) {
+        ERR("Could not set capture params\n");
+        return -1;
+    }
+
+    if (snd_pcm_start(state.play) < 0) {
+        ERR("Could not start playback PCM\n");
+        return -1;
+    }
+
+    if (snd_pcm_start(state.rec) < 0) {
+        ERR("Could not start capture PCM\n");
+        return -1;
+    }
+
+    return 0;
+}
+
+static void close_pcms(void)
+{
+    if (state.play) {
+        snd_pcm_close(state.play);
+        state.play = NULL;
+    }
+
+    if (state.rec) {
+        snd_pcm_close(state.rec);
+        state.rec = NULL;
+    }
+}
+
 /* Return negative value to signal death (currently only returns 0 */
 static int process(const char *command)
 {
@@ -180,6 +246,11 @@ static int process(const char *command)
             if (ret == 0 && state.start_voice) {
                 state.start_voice = 0;
                 ret = csd_client_start_voice();
+
+                if (ret == 0) {
+                    DBG("Opening PCMs\n");
+                    ret = open_pcms();
+                }
             }
         }
 
@@ -206,6 +277,11 @@ static int process(const char *command)
             if (ret == 0 && state.start_voice) {
                 state.start_voice = 0;
                 ret = csd_client_start_voice();
+
+                if (ret == 0) {
+                    DBG("Opening PCMs\n");
+                    ret = open_pcms();
+                }
             }
         }
 
@@ -247,6 +323,11 @@ static int process(const char *command)
     } else if (strcmp(command, "stop-voice") == 0) {
         ret = csd_client_stop_voice();
 
+        if (ret == 0) {
+            DBG("Closing PCMs\n");
+            close_pcms();
+        }
+
         /* Reset all the things */
         state.start_voice = 0;
         state.disable_device = 0;
-- 
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