From 49867bd432352d19172ab26cf873bd5651e69e25 Mon Sep 17 00:00:00 2001
From: ben <ben@b3059339-0415-0410-9bf9-f77b7e298cf2>
Date: Mon, 31 Jul 2006 17:39:17 +0000
Subject: introduce new 'stream' directory for all stream layer related
 components and split them from libmpdemux

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@19277 b3059339-0415-0410-9bf9-f77b7e298cf2
---
 stream/ai_oss.c | 139 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 stream/ai_oss.c

(limited to 'stream/ai_oss.c')

diff --git a/stream/ai_oss.c b/stream/ai_oss.c
new file mode 100644
index 0000000000..bd7c7c312a
--- /dev/null
+++ b/stream/ai_oss.c
@@ -0,0 +1,139 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "config.h"
+
+#include <string.h> /* strerror */
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+
+#ifdef HAVE_SYS_SOUNDCARD_H
+#include <sys/soundcard.h>
+#else
+#ifdef HAVE_SOUNDCARD_H
+#include <soundcard.h>
+#else
+#include <linux/soundcard.h>
+#endif
+#endif
+
+#include "audio_in.h"
+#include "mp_msg.h"
+#include "help_mp.h"
+
+int ai_oss_set_samplerate(audio_in_t *ai)
+{
+    int tmp = ai->req_samplerate;
+    if (ioctl(ai->oss.audio_fd, SNDCTL_DSP_SPEED, &tmp) == -1) return -1;
+    ai->samplerate = tmp;
+    return 0;
+}
+
+int ai_oss_set_channels(audio_in_t *ai)
+{
+    int err;
+    int ioctl_param;
+
+    if (ai->req_channels > 2)
+    {
+	ioctl_param = ai->req_channels;
+	mp_msg(MSGT_TV, MSGL_V, "ioctl dsp channels: %d\n",
+	       err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_CHANNELS, &ioctl_param));
+	if (err < 0) {
+	    mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetChanCount,
+		   ai->req_channels);
+	    return -1;
+	}
+	ai->channels = ioctl_param;
+    }
+    else
+    {
+	ioctl_param = (ai->req_channels == 2);
+	mp_msg(MSGT_TV, MSGL_V, "ioctl dsp stereo: %d (req: %d)\n",
+	       err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_STEREO, &ioctl_param),
+	       ioctl_param);
+	if (err < 0) {
+	    mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetStereo,
+		   ai->req_channels == 2);
+	    return -1;
+	}
+	ai->channels = ioctl_param ? 2 : 1;
+    }
+    return 0;
+}
+
+int ai_oss_init(audio_in_t *ai)
+{
+    int err;
+    int ioctl_param;
+
+    ai->oss.audio_fd = open(ai->oss.device, O_RDONLY);
+    if (ai->oss.audio_fd < 0)
+    {
+	mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2Open,
+	       ai->oss.device, strerror(errno));
+	return -1;
+    }
+	
+    ioctl_param = 0 ;
+    mp_msg(MSGT_TV, MSGL_V, "ioctl dsp getfmt: %d\n",
+	   ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETFMTS, &ioctl_param));
+	
+    mp_msg(MSGT_TV, MSGL_V, "Supported formats: %x\n", ioctl_param);
+    if (!(ioctl_param & AFMT_S16_LE))
+	mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_UnsupportedFmt);
+
+    ioctl_param = AFMT_S16_LE;
+    mp_msg(MSGT_TV, MSGL_V, "ioctl dsp setfmt: %d\n",
+	   err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETFMT, &ioctl_param));
+    if (err < 0) {
+	mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetAudioFmt);
+	return -1;
+    }
+
+    if (ai_oss_set_channels(ai) < 0) return -1;
+	
+    ioctl_param = ai->req_samplerate;
+    mp_msg(MSGT_TV, MSGL_V, "ioctl dsp speed: %d\n",
+	   err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SPEED, &ioctl_param));
+    if (err < 0) {
+	mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetSamplerate,
+	       ai->req_samplerate);
+	return -1;
+    }
+    ai->samplerate = ioctl_param;
+
+    mp_msg(MSGT_TV, MSGL_V, "ioctl dsp trigger: %d\n",
+	   ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETTRIGGER, &ioctl_param));
+    mp_msg(MSGT_TV, MSGL_V, "trigger: %x\n", ioctl_param);
+    ioctl_param = PCM_ENABLE_INPUT;
+    mp_msg(MSGT_TV, MSGL_V, "ioctl dsp trigger: %d\n",
+	   err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_SETTRIGGER, &ioctl_param));
+    if (err < 0) {
+	mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2SetTrigger,
+	       PCM_ENABLE_INPUT);
+    }
+
+    ai->blocksize = 0;
+    mp_msg(MSGT_TV, MSGL_V, "ioctl dsp getblocksize: %d\n",
+	   err = ioctl(ai->oss.audio_fd, SNDCTL_DSP_GETBLKSIZE, &ai->blocksize));
+    if (err < 0) {
+	mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_Unable2GetBlockSize);
+    }
+    mp_msg(MSGT_TV, MSGL_V, "blocksize: %d\n", ai->blocksize);
+
+    // correct the blocksize to a reasonable value
+    if (ai->blocksize <= 0) {
+	ai->blocksize = 4096*ai->channels*2;
+	mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_AudioBlockSizeZero, ai->blocksize);
+    } else if (ai->blocksize < 4096*ai->channels*2) {
+	ai->blocksize *= 4096*ai->channels*2/ai->blocksize;
+	mp_msg(MSGT_TV, MSGL_ERR, MSGTR_MPDEMUX_AIOSS_AudioBlockSize2Low, ai->blocksize);
+    }
+
+    ai->samplesize = 16;
+    ai->bytes_per_sample = 2;
+
+    return 0;
+}
-- 
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