commit some work and rename

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@13 fefdeb5f-60dc-0310-8127-8f9354f1896f

src/module-oss.c

@@ -0,0 +1,234 @@
+#include <soundcard.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <limits.h>
+
+#include "iochannel.h"
+#include "sink.h"
+#include "source.h"
+#include "module.h"
+
+struct userdata {
+    struct sink *sink;
+    struct source *source;
+    struct iochannel *io;
+    struct core *core;
+
+    struct memchunk memchunk, silence;
+
+    uint32_t fragment_size;
+};
+
+static void do_write(struct userdata *u) {
+    struct memchunk *memchunk;
+    ssize_t r;
+    assert(u);
+
+    if (!iochannel_is_writable(u->io))
+        return;
+
+    if (!u->memchunk.length) {
+        if (sink_render(u->sink, fragment_size, &u->memchunk) < 0)
+            memchunk = &u->silence;
+        else
+            memchunk = &u->memchunk;
+    }
+
+    assert(memchunk->memblock && memchunk->length);
+    
+    if ((r = iochannel_write(u->io, memchunk->memblock->data + memchunk->index, memchunk->length)) < 0) {
+        fprintf(stderr, "write() failed: %s\n", strerror(errno));
+        return;
+    }
+
+    if (memchunk == &u->silence)
+        assert(r % u->sample_size == 0);
+    else {
+        u->memchunk.index += r;
+        u->memchunk.length -= r;
+        
+        if (u->memchunk.length <= 0) {
+            memblock_unref(u->memchunk.memblock);
+            u->memchunk.memblock = NULL;
+        }
+    }
+}
+
+static void do_read(struct userdata *u) {
+    struct memchunk memchunk;
+    ssize_t r;
+    assert(u);
+    
+    if (!iochannel_is_readable(u->io))
+        return;
+
+    memchunk.memblock = memblock_new(u->fragment_size);
+    assert(memchunk.memblock);
+    if ((r = iochannel_read(u->io, memchunk.memblock->data, memchunk->memblock->length)) < 0) {
+        memblock_unref(memchunk.memblock);
+        fprintf(stderr, "read() failed: %s\n", strerror(errno));
+        return;
+    }
+
+    assert(r < memchunk->memblock->length);
+    memchunk.length = memchunk.memblock->length = r;
+    memchunk.index = 0;
+
+    source_post(u->source, &memchunk);
+    memblock_unref(memchunk.memblock);
+};
+
+static void io_callback(struct iochannel *io, void*userdata) {
+    struct userdata *u = userdata;
+    assert(u);
+    do_write(u);
+    do_read(u);
+}
+
+int module_init(struct core *c, struct module*m) {
+    struct userdata *u = NULL;
+    struct stat st;
+    char *p;
+    int fd = -1;
+    int format, channels, speed, frag_size;
+    int m;
+    const static struct sample_spec ss;
+    assert(c && m);
+
+    p = m->argument ? m->argument : "/dev/dsp";
+    if ((fd = open(p, m = O_RDWR)) >= 0) {
+        int caps;
+
+        ioctl(fd, SNDCTL_DSP_SETDUPLEX, 0);
+        
+        if (ioctl(fd, SNDCTL_DSP_GETCAPS, &caps) < 0) {
+            fprintf(stderr, "SNDCTL_DSP_GETCAPS: %s\n", strerror(errno));
+            goto fail;
+        }
+
+        if (!(caps & DSP_CAP_DUPLEX)) {
+            close(fd);
+            fd = -1;
+        }
+    }
+
+    if (fd < 0) {
+        if ((fd = open(p, m = O_WRONLY)) < 0) {
+            if ((fd = open(p, m = O_RDONLY)) < 0) {
+                fprintf(stderr, "open('%s'): %s\n", p, strerror(errno));
+                goto fail;
+            }
+        }
+    }
+
+    frags = 0x7fff0000 | (10 << 16); /* 1024 bytes fragment size */
+    if (ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &frags) < 0) {
+        fprintf(stderr, "SNDCTL_DSP_SETFRAGMENT: %s\n", strerror(errno));
+        goto fail;
+    }
+
+    format = AFMT_S16_NE;
+    if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_S16_NE) {
+        int f = AFMT_S16_NE == AFMT_S16_LE ? AFMT_S16_BE : AFMT_S16_LE;
+        format = f;
+        if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != f) {
+            format = AFMT_U8;
+            if (ioctl(fd, SNDCTL_DSP_SETFMT, &format) < 0 || format != AFMT_U8) {
+                fprintf(stderr, "SNDCTL_DSP_SETFMT: %s\n", format != AFMT_U8 ? "No supported sample format" : strerror(errno));
+                goto fail;
+            } else
+                ss.format = SAMPLE_U8;
+        } else
+            ss.format = f == AFMT_S16_LE ? SAMPLE_S16LE : SAMPLE_S16BE;
+    } else
+        ss.format = SAMPLE_S16NE;
+        
+    channels = 2;
+    if (ioctl(fd, SNDCTL_DSP_CHANNELS, &channels) < 0) {
+        fprintf(stderr, "SNDCTL_DSP_CHANNELS: %s\n", strerror(errno));
+        goto fail;
+    }
+    assert(channels);
+    ss.channels = channels;
+
+    speed = 44100;
+    if (ioctl(fd, SNDCTL_DSP_SPEED, &speed) < 0) {
+        fprintf(stderr, "SNDCTL_DSP_SPEED: %s\n", strerror(errno));
+        goto fail;
+    }
+    assert(speed);
+    ss.rate = speed;
+
+    if (ioctl(fd, SNCTL_DSP_GETBLKSIZE, &frag_size) < 0) {
+        fprintf(stderr, "SNDCTL_DSP_GETBLKSIZE: %s\n", strerror(errno));
+        goto fail;
+    }
+
+    assert(frag_size);
+    
+    u = malloc(sizeof(struct userdata));
+    assert(u);
+
+    u->core = c;
+
+    if (m != O_RDONLY) {
+        u->sink = sink_new(c, "dsp", &ss);
+        assert(u->sink);
+    } else
+        u->sink = NULL;
+
+    if (m != O_WRONLY) {
+        u->source = source_new(c, "dsp", &ss);
+        assert(u->source);
+    } else
+        u->source = NULL;
+
+    assert(u->source || u->sink);
+
+    u->io = iochannel_new(c->mainloop, u->source ? fd : -1, u->sink ? fd : 0);
+    assert(u->io);
+    iochannel_set_callback(u->io, io_callback, u);
+
+    u->memchunk.memblock = NULL;
+    u->memchunk.length = 0;
+
+    u->fragment_size = frag_size;
+    u->silence.memblock = memblock_new(u->fragment_size);
+    assert(u->silence);
+    u->silence.length = u->fragment_size;
+    u->silence.index = 0;
+    
+    m->userdata = u;
+
+    return 0;
+
+fail:
+    if (fd >= 0)
+        close(fd);
+
+    return -1;
+}
+
+void module_done(struct core *c, struct module*m) {
+    struct userdata *u;
+    assert(c && m);
+
+    u = m->userdata;
+    assert(u);
+    
+    if (u->memchunk.memblock)
+        memblock_unref(u->memchunk.memblock);
+    if (u->silence.memblock)
+        memblock_unref(u->silence.memblock);
+        
+    sink_free(u->sink);
+    source_free(u->source);
+    iochannel_free(u->io);
+    free(u);
+}