add an error check for invalid maxfrac before returning it, nothing significant

[xonotic/darkplaces.git] / snd_dma.c

diff --git a/snd_dma.c b/snd_dma.c
index 836227e00e07ad1c03cbbe6f0b9c75f47858ffbe..0e91d01085ea880e64c443fef90e0f35c872fc60 100644 (file)
--- a/snd_dma.c
+++ b/snd_dma.c
@@ -170,7 +170,7 @@ void S_Init (void)
        Cvar_RegisterVariable(&volume);
        Cvar_RegisterVariable(&bgmvolume);
 
-       if (COM_CheckParm("-nosound"))
+       if (COM_CheckParm("-nosound") || COM_CheckParm("-safe"))
                return;
 
        snd_mempool = Mem_AllocPool("sound");
@@ -1043,9 +1043,9 @@ void S_RawSamples_Enqueue(short *samples, unsigned int length)
        if (s_rawsamplesbuffer_count + length > RAWSAMPLESBUFFER)
                return;
        b2 = (s_rawsamplesbuffer_start + s_rawsamplesbuffer_count) % RAWSAMPLESBUFFER;
-       b3 = (s_rawsamplesbuffer_start + s_rawsamplesbuffer_count + length) % RAWSAMPLESBUFFER;
-       if (b3 < b2)
+       if (b2 + length > RAWSAMPLESBUFFER)
        {
+               b3 = (b2 + length) % RAWSAMPLESBUFFER;
                memcpy(s_rawsamplesbuffer + b2 * 2, samples, (RAWSAMPLESBUFFER - b2) * sizeof(short[2]));
                memcpy(s_rawsamplesbuffer, samples + (RAWSAMPLESBUFFER - b2) * 2, b3 * sizeof(short[2]));
        }
@@ -1065,9 +1065,9 @@ void S_RawSamples_Dequeue(int *samples, unsigned int length)
        if (l > s_rawsamplesbuffer_count)
                l = s_rawsamplesbuffer_count;
        b1 = (s_rawsamplesbuffer_start) % RAWSAMPLESBUFFER;
-       b2 = (s_rawsamplesbuffer_start + l) % RAWSAMPLESBUFFER;
-       if (b2 < b1)
+       if (b1 + l > RAWSAMPLESBUFFER)
        {
+               b2 = (b1 + l) % RAWSAMPLESBUFFER;
                //memcpy(samples, s_rawsamplesbuffer + b1 * 2, (RAWSAMPLESBUFFER - b1) * sizeof(short[2]));
                //memcpy(samples + (RAWSAMPLESBUFFER - b1) * 2, s_rawsamplesbuffer, b2 * sizeof(short[2]));
                for (out = samples, in = s_rawsamplesbuffer + b1 * 2, count = (RAWSAMPLESBUFFER - b1) * 2, i = 0;i < count;i++)
@@ -1086,7 +1086,7 @@ void S_RawSamples_Dequeue(int *samples, unsigned int length)
        if (l < length)
        {
                memset(samples + l * 2, 0, (length - l) * sizeof(int[2]));
-               //Con_Printf("S_RawSamples_Dequeue: padding with %i\n", length - l);
+               //Con_Printf("S_RawSamples_Dequeue: padding with %i samples\n", length - l);
        }
        s_rawsamplesbuffer_start = (s_rawsamplesbuffer_start + l) % RAWSAMPLESBUFFER;
        s_rawsamplesbuffer_count -= l;
@@ -1098,3 +1098,45 @@ void S_RawSamples_ClearQueue(void)
        s_rawsamplesbuffer_start = 0;
 }
 
+int S_RawSamples_QueueWantsMore(void)
+{
+       if (s_rawsamplesbuffer_count < min(shm->speed >> 1, RAWSAMPLESBUFFER >> 1))
+               return RAWSAMPLESBUFFER - s_rawsamplesbuffer_count;
+       else
+               return 0;
+}
+
+void S_ResampleBuffer16Stereo(short *input, int inputlength, short *output, int outputlength)
+{
+       if (inputlength != outputlength)
+       {
+               int i, position, stopposition, step;
+               short *in, *out;
+               step = (float) inputlength * 256.0f / (float) outputlength;
+               position = 0;
+               stopposition = (inputlength - 1) << 8;
+               out = output;
+               for (i = 0;i < outputlength && position < stopposition;i++, position += step)
+               {
+                       in = input + ((position >> 8) << 1);
+                       out[0] = (((in[1] - in[0]) * (position & 255)) >> 8) + in[0];
+                       out[1] = (((in[3] - in[2]) * (position & 255)) >> 8) + in[2];
+                       out += 2;
+               }
+               stopposition = inputlength << 8;
+               for (i = 0;i < outputlength && position < stopposition;i++, position += step)
+               {
+                       in = input + ((position >> 8) << 1);
+                       out[0] = in[0];
+                       out[1] = in[2];
+                       out += 2;
+               }
+       }
+       else
+               memcpy(output, input, inputlength * sizeof(short[2]));
+}
+
+int S_RawSamples_SampleRate(void)
+{
+       return shm != NULL ? shm->speed : 0;
+}