make osx_write work for any bitrate
[paraslash.git] / osx_writer.c
index c07bbd5..2af553d 100644 (file)
@@ -50,6 +50,7 @@ struct private_osx_writer_data {
        sem_t *semaphore;
        osx_buffer *from; /* Current buffers */
        osx_buffer *to;
+       unsigned samplerate;
 };
 
 
@@ -99,9 +100,9 @@ static void fill_buffer(osx_buffer *b, short *source, long size)
 {
        float *dest;
 
-       PARA_INFO_LOG("%ld\n", size);
        if (b->remaining) /* Non empty buffer, must still be playing */
                return;
+       PARA_INFO_LOG("%ld\n", size);
        if (b->size != size) {
                /*
                 * Hey! What's that? Coudn't this buffer size be fixed
@@ -113,9 +114,14 @@ static void fill_buffer(osx_buffer *b, short *source, long size)
                b->size = size;
        }
        dest = b->buffer;
-       while (size--)
+       while (size--) {
+               char *tmp = (char *)source;
+               char c = *tmp;
+               *tmp = *(tmp + 1);
+               *(tmp + 1) = c;
                /* *dest++ = ((*source++) + 32768) / 65536.0; */
                *dest++ = (*source++) / 32768.0;
+       }
        b->ptr = b->buffer;
        b->remaining = b->size;
 }
@@ -144,6 +150,7 @@ static OSStatus osx_callback(void * inClientData,
                                        /* wait for the results */
                                        usleep(2000);
                        }
+                       PARA_INFO_LOG("buf %p: n = %ld, m= %ld\n", powd->from->buffer, n, m);
                        /*
                         * we dump what we can. In fact, just the necessary
                         * should be sufficient
@@ -175,6 +182,8 @@ static int osx_writer_open(struct writer_node *wn)
        AudioStreamBasicDescription format;
        char s[10];
        int m, ret;
+       struct writer_node_group *wng = wn->wng;
+       struct osx_write_args_info *conf = wn->conf;
 
        wn->private_data = powd;
        /* where did that default audio output go? */
@@ -203,13 +212,17 @@ static int osx_writer_open(struct writer_node *wn)
         * AND you want the DefaultOutputUnit to do any format conversions
         * necessary from your format to the device's format.
         */
-       format.mSampleRate = 44100.0; /* The sample rate of the audio stream */
+       if (!conf->samplerate_given && wng->samplerate)
+               powd->samplerate = *wng->samplerate;
+       else
+               powd->samplerate = conf->samplerate_arg;
+       format.mSampleRate = powd->samplerate;
        /* The specific encoding type of audio stream*/
        format.mFormatID = kAudioFormatLinearPCM;
        /* flags specific to each format */
        format.mFormatFlags = kLinearPCMFormatFlagIsFloat
-               | kLinearPCMFormatFlagIsPacked;
-       //      | kLinearPCMFormatFlagIsBigEndian;
+               | kLinearPCMFormatFlagIsPacked
+               | kLinearPCMFormatFlagIsBigEndian;
        /*
         * We produce 2-channel audio. Now if we have a mega-super-hyper card for our
         * audio, it is its problem to convert it to 8-, 16-, 32- or 1024-channel data.
@@ -239,7 +252,7 @@ static int osx_writer_open(struct writer_node *wn)
                        kAudioUnitScope_Input, 0, &inputCallback,
                        sizeof(inputCallback)) < 0)
                goto e3;
-       return 0;
+       return 1;
 e3:
        destroy_buffers(powd);
 e2:
@@ -278,20 +291,30 @@ static void osx_writer_close(struct writer_node *wn)
        free(powd);
 }
 
+static int need_new_buffer(struct writer_node *wn)
+{
+       struct writer_node_group *wng = wn->wng;
+       struct private_osx_writer_data *powd = wn->private_data;
+
+       if (*wng->loaded < sizeof(short))
+               return 0;
+       if (powd->to->remaining) /* Non empty buffer, must still be playing */
+               return 0;
+       return 1;
+}
+
 static int osx_write_post_select(__a_unused struct sched *s,
                struct writer_node *wn)
 {
        struct private_osx_writer_data *powd = wn->private_data;
        struct writer_node_group *wng = wn->wng;
-       short *data = (short*)wng->buf + wn->written;
+       short *data = (short*)wng->buf;
 
-       if (!*wng->loaded)
+       if (!need_new_buffer(wn))
                return 1;
-       if (powd->to->remaining) /* Non empty buffer, must still be playing */
-               return 1;
-       fill_buffer(powd->to, data, (*wng->loaded - wn->written) / sizeof(short));
+       fill_buffer(powd->to, data, *wng->loaded / sizeof(short));
        powd->to = powd->to->next;
-       wn->written += (*wng->loaded - wn->written);
+       wn->written = *wng->loaded;
        if (!powd->play) {
                if (AudioOutputUnitStart(powd->output))
                        return -1;
@@ -300,15 +323,8 @@ static int osx_write_post_select(__a_unused struct sched *s,
        return 1;
 }
 
-static int osx_write_pre_select(struct sched *s, struct writer_node *wn)
+static int osx_write_pre_select(struct sched *s, __a_unused struct writer_node *wn)
 {
-       struct writer_node_group *wng = wn->wng;
-       struct private_osx_writer_data *powd = wn->private_data;
-
-//     if (!*wng->loaded)
-//             return 1;
-//     if (powd->to->remaining) /* Non empty buffer, must still be playing */
-//             return 1;
        s->timeout.tv_sec = 0;
        s->timeout.tv_usec = 20;
        return 1;