mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-05 13:29:57 -05:00
implement a /dev/mixer interface
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@956 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering
parent
440b901a4d
commit
ca08e57470
1 changed files with 262 additions and 26 deletions
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@ -79,6 +79,10 @@ struct fd_info {
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int operation_success;
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pa_cvolume volume;
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uint32_t sink_index;
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int volume_modify_count;
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PA_LLIST_FIELDS(fd_info);
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};
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@ -154,6 +158,21 @@ do { \
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pthread_mutex_unlock(&func_mutex); \
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} while(0)
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#define CONTEXT_CHECK_DEAD_GOTO(i, label) do { \
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if (!(i)->context || pa_context_get_state((i)->context) != PA_CONTEXT_READY) { \
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debug(__FILE__": Not connected: %s", (i)->context ? pa_strerror(pa_context_errno((i)->context)) : "NULL"); \
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goto label; \
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} \
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} while(0);
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#define STREAM_CHECK_DEAD_GOTO(i, label) do { \
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if (!(i)->context || pa_context_get_state((i)->context) != PA_CONTEXT_READY || \
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!(i)->stream || pa_stream_get_state((i)->stream) != PA_STREAM_READY) { \
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debug(__FILE__": Not connected: %s", (i)->context ? pa_strerror(pa_context_errno((i)->context)) : "NULL"); \
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goto label; \
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} \
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} while(0);
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static void debug(const char *format, ...) PA_GCC_PRINTF_ATTR(1,2);
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static void debug(const char *format, ...) {
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@ -375,6 +394,26 @@ static void install_atfork(void) {
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pthread_atfork(atfork_prepare, atfork_parent, atfork_child);
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}
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static void stream_success_cb(pa_stream *s, int success, void *userdata) {
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fd_info *i = userdata;
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assert(s);
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assert(i);
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i->operation_success = success;
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pa_threaded_mainloop_signal(i->mainloop, 0);
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}
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static void context_success_cb(pa_context *c, int success, void *userdata) {
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fd_info *i = userdata;
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assert(c);
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assert(i);
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i->operation_success = success;
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pa_threaded_mainloop_signal(i->mainloop, 0);
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}
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static fd_info* fd_info_new(fd_info_type_t type, int *_errno) {
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fd_info *i;
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int sfds[2] = { -1, -1 };
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@ -403,6 +442,9 @@ static fd_info* fd_info_new(fd_info_type_t type, int *_errno) {
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i->ref = 1;
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i->buf = NULL;
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i->unusable = 0;
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pa_cvolume_reset(&i->volume, 2);
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i->volume_modify_count = 0;
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i->sink_index = (uint32_t) -1;
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PA_LLIST_INIT(fd_info, i);
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reset_params(i);
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@ -760,15 +802,118 @@ fail:
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return -1;
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}
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static void sink_info_cb(pa_context *context, const pa_sink_info *si, int eol, void *userdata) {
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fd_info *i = userdata;
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if (!si && eol < 0) {
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i->operation_success = 0;
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pa_threaded_mainloop_signal(i->mainloop, 0);
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return;
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}
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if (eol)
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return;
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if (!pa_cvolume_equal(&i->volume, &si->volume))
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i->volume_modify_count++;
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i->volume = si->volume;
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i->sink_index = si->index;
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i->operation_success = 1;
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pa_threaded_mainloop_signal(i->mainloop, 0);
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}
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static void subscribe_cb(pa_context *context, pa_subscription_event_type_t t, uint32_t idx, void *userdata) {
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fd_info *i = userdata;
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pa_operation *o = NULL;
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if (i->sink_index != idx)
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return;
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if ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) != PA_SUBSCRIPTION_EVENT_CHANGE)
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return;
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if (!(o = pa_context_get_sink_info_by_index(i->context, i->sink_index, sink_info_cb, i))) {
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debug(__FILE__": Failed to get sink info: %s", pa_strerror(pa_context_errno(i->context)));
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return;
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}
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pa_operation_unref(o);
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}
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static int mixer_open(int flags, int *_errno) {
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/* fd_info *i; */
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fd_info *i;
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pa_operation *o;
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int ret;
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if (!(i = fd_info_new(FD_INFO_MIXER, _errno)))
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return -1;
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pa_threaded_mainloop_lock(i->mainloop);
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pa_context_set_subscribe_callback(i->context, subscribe_cb, i);
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if (!(o = pa_context_subscribe(i->context, PA_SUBSCRIPTION_MASK_SINK, context_success_cb, i))) {
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debug(__FILE__": Failed to subscribe to events: %s", pa_strerror(pa_context_errno(i->context)));
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*_errno = EIO;
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goto fail;
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}
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i->operation_success = 0;
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while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
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pa_threaded_mainloop_wait(i->mainloop);
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CONTEXT_CHECK_DEAD_GOTO(i, fail);
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}
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if (!i->operation_success) {
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debug(__FILE__":Failed to subscribe to events: %s", pa_strerror(pa_context_errno(i->context)));
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*_errno = EIO;
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goto fail;
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}
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/* Get sink info */
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pa_operation_unref(o);
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if (!(o = pa_context_get_sink_info_by_name(i->context, NULL, sink_info_cb, i))) {
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debug(__FILE__": Failed to get sink info: %s", pa_strerror(pa_context_errno(i->context)));
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*_errno = EIO;
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goto fail;
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}
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i->operation_success = 0;
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while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
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pa_threaded_mainloop_wait(i->mainloop);
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CONTEXT_CHECK_DEAD_GOTO(i, fail);
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}
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if (!i->operation_success) {
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debug(__FILE__": Failed to get sink info: %s", pa_strerror(pa_context_errno(i->context)));
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*_errno = EIO;
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goto fail;
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}
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pa_threaded_mainloop_unlock(i->mainloop);
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debug(__FILE__": mixer_open() succeeded, fd=%i\n", i->app_fd);
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fd_info_add_to_list(i);
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ret = i->app_fd;
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fd_info_unref(i);
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return ret;
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fail:
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pa_threaded_mainloop_unlock(i->mainloop);
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if (i)
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fd_info_unref(i);
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*_errno = EIO;
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debug(__FILE__": mixer_open() failed\n");
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*_errno = ENOSYS;
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return -1;
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/* if (!(i = fd_info_new(FD_INFO_MIXER))) */
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/* return -1; */
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}
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static int sndstat_open(int flags, int *_errno) {
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@ -879,8 +1024,109 @@ int open(const char *filename, int flags, ...) {
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}
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static int mixer_ioctl(fd_info *i, unsigned long request, void*argp, int *_errno) {
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*_errno = ENOSYS;
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return -1;
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int ret = -1;
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switch (request) {
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case SOUND_MIXER_READ_DEVMASK :
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debug(__FILE__": SOUND_MIXER_READ_DEVMASK\n");
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*(int*) argp = SOUND_MASK_PCM;
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break;
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case SOUND_MIXER_READ_RECMASK :
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debug(__FILE__": SOUND_MIXER_READ_RECMASK\n");
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*(int*) argp = 0;
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break;
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case SOUND_MIXER_READ_STEREODEVS:
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debug(__FILE__": SOUND_MIXER_READ_STEREODEVS\n");
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pa_threaded_mainloop_lock(i->mainloop);
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*(int*) argp = i->volume.channels > 1 ? SOUND_MASK_PCM : 0;
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pa_threaded_mainloop_unlock(i->mainloop);
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break;
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case SOUND_MIXER_READ_RECSRC:
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debug(__FILE__": SOUND_MIXER_READ_RECSRC\n");
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*(int*) argp = 0;
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break;
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case SOUND_MIXER_CAPS:
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debug(__FILE__": SOUND_MIXER_CAPS\n");
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*(int*) argp = 0;
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break;
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case SOUND_MIXER_READ_PCM:
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debug(__FILE__": SOUND_MIXER_READ_PCM\n");
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pa_threaded_mainloop_lock(i->mainloop);
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*(int*) argp =
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((i->volume.values[0]*100/PA_VOLUME_NORM) << 8) |
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((i->volume.values[i->volume.channels > 1 ? 1 : 0]*100/PA_VOLUME_NORM));
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pa_threaded_mainloop_unlock(i->mainloop);
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break;
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case SOUND_MIXER_WRITE_PCM: {
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pa_cvolume v;
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debug(__FILE__": SOUND_MIXER_WRITE_PCM\n");
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pa_threaded_mainloop_lock(i->mainloop);
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v = i->volume;
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i->volume.values[0] = ((*(int*) argp >> 8)*PA_VOLUME_NORM)/100;
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i->volume.values[1] = ((*(int*) argp & 0xFF)*PA_VOLUME_NORM)/100;
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if (!pa_cvolume_equal(&i->volume, &v)) {
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pa_operation *o;
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if (!(o = pa_context_set_sink_volume_by_index(i->context, i->sink_index, &i->volume, NULL, NULL)))
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debug(__FILE__":Failed set volume: %s", pa_strerror(pa_context_errno(i->context)));
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else
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pa_operation_unref(o);
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/* We don't wait for completion here */
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i->volume_modify_count++;
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}
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pa_threaded_mainloop_unlock(i->mainloop);
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break;
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}
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case SOUND_MIXER_INFO: {
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mixer_info *mi = argp;
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memset(mi, 0, sizeof(mixer_info));
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strncpy(mi->id, "POLYPAUDIO", sizeof(mi->id));
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strncpy(mi->name, "Polypaudio Virtual OSS", sizeof(mi->name));
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pa_threaded_mainloop_lock(i->mainloop);
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mi->modify_counter = i->volume_modify_count;
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pa_threaded_mainloop_unlock(i->mainloop);
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break;
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}
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default:
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debug(__FILE__": unknwon ioctl 0x%08lx\n", request);
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*_errno = EINVAL;
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goto fail;
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}
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ret = 0;
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fail:
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return ret;
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}
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static int map_format(int *fmt, pa_sample_spec *ss) {
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@ -936,16 +1182,6 @@ static int map_format_back(pa_sample_format_t format) {
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}
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}
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static void success_cb(pa_stream *s, int success, void *userdata) {
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fd_info *i = userdata;
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assert(s);
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assert(i);
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i->operation_success = success;
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pa_threaded_mainloop_signal(i->mainloop, 0);
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}
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static int dsp_flush_socket(fd_info *i) {
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int l;
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@ -1015,15 +1251,14 @@ static int dsp_drain(fd_info *i) {
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debug(__FILE__": Really draining.\n");
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if (!(o = pa_stream_drain(i->stream, success_cb, i))) {
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if (!(o = pa_stream_drain(i->stream, stream_success_cb, i))) {
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debug(__FILE__": pa_stream_drain(): %s\n", pa_strerror(pa_context_errno(i->context)));
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goto fail;
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}
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i->operation_success = 0;
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while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
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if (!i->stream || pa_stream_get_state(i->stream) != PA_STREAM_READY)
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goto fail;
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STREAM_CHECK_DEAD_GOTO(i, fail);
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pa_threaded_mainloop_wait(i->mainloop);
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}
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@ -1059,15 +1294,14 @@ static int dsp_trigger(fd_info *i) {
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debug(__FILE__": Triggering.\n");
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if (!(o = pa_stream_trigger(i->stream, success_cb, i))) {
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if (!(o = pa_stream_trigger(i->stream, stream_success_cb, i))) {
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debug(__FILE__": pa_stream_trigger(): %s\n", pa_strerror(pa_context_errno(i->context)));
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goto fail;
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}
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i->operation_success = 0;
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while (!pa_operation_get_state(o) != PA_OPERATION_DONE) {
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if (!i->stream || pa_stream_get_state(i->stream) != PA_STREAM_READY)
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goto fail;
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STREAM_CHECK_DEAD_GOTO(i, fail);
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pa_threaded_mainloop_wait(i->mainloop);
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}
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@ -1218,8 +1452,8 @@ static int dsp_ioctl(fd_info *i, unsigned long request, void*argp, int *_errno)
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for (;;) {
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pa_usec_t usec;
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if (!i->stream || pa_stream_get_state(i->stream) != PA_STREAM_READY)
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break;
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STREAM_CHECK_DEAD_GOTO(i, exit_loop);
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if (pa_stream_get_latency(i->stream, &usec, NULL) >= 0) {
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*(int*) argp = pa_usec_to_bytes(usec, &i->sample_spec);
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@ -1234,6 +1468,8 @@ static int dsp_ioctl(fd_info *i, unsigned long request, void*argp, int *_errno)
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pa_threaded_mainloop_wait(i->mainloop);
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}
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exit_loop:
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if (ioctl(i->thread_fd, SIOCINQ, &l) < 0)
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debug(__FILE__": SIOCINQ failed: %s\n", strerror(errno));
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else
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