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- fix segfault due to unitialized struct in ao_nas git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@6115 b3059339-0415-0410-9bf9-f77b7e298cf2
511 lines
12 KiB
C
511 lines
12 KiB
C
/*
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* NAS output plugin for mplayer
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*
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* based on the libaudiooss parts rewritten by me, which were
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* originally based on the NAS output plugin for xmms.
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*
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* xmms plugin by Willem Monsuwe
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* adapted for libaudiooss by Jon Trulson
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* further modified by Erik Inge Bolsø
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* largely rewritten and used for this
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* plugin by Tobias Diedrich
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include <audio/audiolib.h>
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#include "audio_out.h"
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#include "audio_out_internal.h"
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#include "afmt.h"
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#define NAS_FRAG_SIZE 4096
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#define NAS_FRAG_COUNT 8
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#define NAS_BUFFER_SIZE NAS_FRAG_SIZE * NAS_FRAG_COUNT
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#define NAS_DEBUG 0
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#if NAS_DEBUG == 1
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static char *nas_event_types[] = {
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"Undefined",
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"Undefined",
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"ElementNotify",
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"GrabNotify",
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"MonitorNotify",
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"BucketNotify",
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"DeviceNotify"
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};
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static char *nas_elementnotify_kinds[] = {
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"LowWater",
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"HighWater",
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"State",
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"Unknown"
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};
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static char *nas_states[] = {
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"Stop",
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"Start",
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"Pause",
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"Any"
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};
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static char *nas_reasons[] = {
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"User",
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"Underrun",
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"Overrun",
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"EOF",
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"Watermark",
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"Hardware",
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"Any"
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};
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static char* nas_reason(unsigned int reason)
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{
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if (reason > 6) reason = 6;
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return nas_reasons[reason];
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}
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static char* nas_elementnotify_kind(unsigned int kind)
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{
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if (kind > 2) kind = 3;
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return nas_elementnotify_kinds[kind];
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}
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static char* nas_event_type(unsigned int type) {
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if (type > 6) type = 0;
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return nas_event_types[type];
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}
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static char* nas_state(unsigned int state) {
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if (state>3) state = 3;
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return nas_states[state];
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}
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#define DPRINTF(format, args...) fprintf(stderr, format, ## args); \
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fflush(stderr)
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#else
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#define DPRINTF(format, args...)
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#endif
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static ao_info_t info =
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{
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"NAS audio output",
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"nas",
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"Tobias Diedrich",
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""
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};
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struct ao_nas_data {
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AuServer *aud;
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AuFlowID flow;
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AuDeviceID dev;
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int flow_stopped;
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int flow_paused;
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void *client_buffer;
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int client_buffer_size;
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int client_buffer_used;
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int server_buffer_size;
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int server_buffer_used;
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pthread_mutex_t buffer_mutex;
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pthread_t event_thread;
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int stop_thread;
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};
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static struct ao_nas_data *nas_data;
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LIBAO_EXTERN(nas)
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static void nas_print_error(AuServer *aud, char *prefix, AuStatus as)
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{
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char s[100];
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AuGetErrorText(aud, as, s, 100);
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fprintf(stderr, "ao_nas: %s: returned status %d (%s)\n", prefix, as, s);
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fflush(stderr);
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}
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static int nas_readBuffer(struct ao_nas_data *nas_data, int num)
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{
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AuStatus as;
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pthread_mutex_lock(&nas_data->buffer_mutex);
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DPRINTF("ao_nas: nas_readBuffer(): num=%d client=%d/%d server=%d/%d\n",
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num,
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nas_data->client_buffer_used, nas_data->client_buffer_size,
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nas_data->server_buffer_used, nas_data->server_buffer_size);
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if (nas_data->client_buffer_used == 0) {
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DPRINTF("ao_nas: buffer is empty, nothing read.\n");
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pthread_mutex_unlock(&nas_data->buffer_mutex);
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return 0;
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}
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if (nas_data->client_buffer_used < num)
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num = nas_data->client_buffer_used;
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AuWriteElement(nas_data->aud, nas_data->flow, 0, num, nas_data->client_buffer, AuFalse, &as);
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if (as != AuSuccess)
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nas_print_error(nas_data->aud, "nas_readBuffer(): AuWriteElement", as);
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else {
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nas_data->client_buffer_used -= num;
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nas_data->server_buffer_used += num;
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memmove(nas_data->client_buffer, nas_data->client_buffer + num, nas_data->client_buffer_used);
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}
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pthread_mutex_unlock(&nas_data->buffer_mutex);
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if (nas_data->flow_paused) {
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AuPauseFlow(nas_data->aud, nas_data->flow, &as);
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if (as != AuSuccess)
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nas_print_error(nas_data->aud, "nas_readBuffer(): AuPauseFlow", as);
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}
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return num;
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}
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static void nas_writeBuffer(struct ao_nas_data *nas_data, void *data, int len)
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{
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pthread_mutex_lock(&nas_data->buffer_mutex);
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DPRINTF("ao_nas: nas_writeBuffer(): len=%d client=%d/%d server=%d/%d\n",
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len, nas_data->client_buffer_used, nas_data->client_buffer_size,
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nas_data->server_buffer_used, nas_data->server_buffer_size);
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memcpy(nas_data->client_buffer + nas_data->client_buffer_used, data, len);
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nas_data->client_buffer_used += len;
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pthread_mutex_unlock(&nas_data->buffer_mutex);
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if (nas_data->server_buffer_used < nas_data->server_buffer_size)
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nas_readBuffer(nas_data, nas_data->server_buffer_size - nas_data->server_buffer_used);
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}
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static int nas_empty_event_queue(struct ao_nas_data *nas_data)
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{
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AuEvent ev;
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int result = 0;
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while (AuScanForTypedEvent(nas_data->aud, AuEventsQueuedAfterFlush,
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AuTrue, AuEventTypeElementNotify, &ev)) {
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AuDispatchEvent(nas_data->aud, &ev);
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result = 1;
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}
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return result;
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}
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static void *nas_event_thread_start(void *data)
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{
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struct ao_nas_data *nas_data = data;
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AuEvent ev;
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AuBool result;
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do {
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nas_empty_event_queue(nas_data);
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usleep(10000);
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} while (!nas_data->stop_thread);
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}
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static AuBool nas_error_handler(AuServer* aud, AuErrorEvent* ev)
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{
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char s[100];
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AuGetErrorText(aud, ev->error_code, s, 100);
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fprintf(stderr,"ao_nas: error [%s]\n"
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"error_code: %d\n"
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"request_code: %d\n"
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"minor_code: %d\n",
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s,
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ev->error_code,
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ev->request_code,
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ev->minor_code);
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fflush(stderr);
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return AuTrue;
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}
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static AuBool nas_event_handler(AuServer *aud, AuEvent *ev, AuEventHandlerRec *hnd)
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{
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AuElementNotifyEvent *event = (AuElementNotifyEvent *) ev;
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AuStatus as;
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struct ao_nas_data *nas_data = hnd->data;
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switch (ev->type) {
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case AuEventTypeElementNotify:
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DPRINTF("ao_nas: event_handler(): kind %s state %s->%s reason %s numbytes %d\n",
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nas_elementnotify_kind(event->kind),
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nas_state(event->prev_state),
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nas_state(event->cur_state),
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nas_reason(event->reason),
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event->num_bytes);
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nas_data->server_buffer_used -= event->num_bytes;
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if (nas_data->server_buffer_used < 0)
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nas_data->server_buffer_used = 0;
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switch (event->kind) {
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case AuElementNotifyKindLowWater:
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nas_readBuffer(nas_data, event->num_bytes);
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break;
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case AuElementNotifyKindState:
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if (event->cur_state == AuStatePause) {
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switch (event->reason) {
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case AuReasonUnderrun:
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// buffer underrun -> refill buffer
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nas_data->server_buffer_used = 0;
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nas_readBuffer(nas_data, nas_data->server_buffer_size - nas_data->server_buffer_used);
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break;
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default:
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break;
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}
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}
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break;
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default: // silently ignored
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break;
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}
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break;
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default:
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printf("ao_nas: nas_event_handler(): unhandled event type %d\n", ev->type);
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break;
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}
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return AuTrue;
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}
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static AuDeviceID nas_find_device(AuServer *aud, int nch)
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{
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int i;
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for (i = 0; i < AuServerNumDevices(aud); i++) {
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AuDeviceAttributes *dev = AuServerDevice(aud, i);
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if ((AuDeviceKind(dev) == AuComponentKindPhysicalOutput) &&
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AuDeviceNumTracks(dev) == nch) {
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return AuDeviceIdentifier(dev);
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}
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}
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return AuNone;
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}
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static unsigned char nas_aformat_to_auformat(unsigned int format)
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{
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switch (format) {
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case AFMT_U8: return AuFormatLinearUnsigned8;
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case AFMT_S8: return AuFormatLinearSigned8;
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case AFMT_U16_LE: return AuFormatLinearUnsigned16LSB;
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case AFMT_U16_BE: return AuFormatLinearUnsigned16MSB;
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#ifndef WORDS_BIGENDIAN
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case AFMT_AC3:
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#endif
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case AFMT_S16_LE: return AuFormatLinearSigned16LSB;
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#ifdef WORDS_BIGENDIAN
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case AFMT_AC3:
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#endif
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case AFMT_S16_BE: return AuFormatLinearSigned16MSB;
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case AFMT_MU_LAW: return AuFormatULAW8;
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default: return 0;
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}
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}
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// to set/get/query special features/parameters
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static int control(int cmd,int arg){
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return -1;
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}
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// open & setup audio device
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// return: 1=success 0=fail
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static int init(int rate,int channels,int format,int flags)
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{
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AuElement elms[3];
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AuStatus as;
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unsigned char auformat = nas_aformat_to_auformat(format);
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int bytes_per_sample = channels * AuSizeofFormat(auformat);
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char *server;
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nas_data=malloc(sizeof(struct ao_nas_data));
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memset(nas_data, 0, sizeof(struct ao_nas_data));
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printf("ao2: %d Hz %d chans %s\n",rate,channels,
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audio_out_format_name(format));
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if (!auformat) {
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printf("ao_nas: init(): Unsupported format -> nosound\n");
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return 0;
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}
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nas_data->client_buffer_size = NAS_BUFFER_SIZE;
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nas_data->client_buffer = malloc(nas_data->client_buffer_size);
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nas_data->server_buffer_size = NAS_BUFFER_SIZE;
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ao_data.samplerate = rate;
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ao_data.channels = channels;
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ao_data.buffersize = NAS_BUFFER_SIZE * 2;
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ao_data.outburst = NAS_FRAG_SIZE;
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ao_data.bps = rate * bytes_per_sample;
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if (!bytes_per_sample) {
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printf("ao_nas: init(): Zero bytes per sample -> nosound\n");
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return 0;
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}
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if (!(server = getenv("AUDIOSERVER")))
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server = getenv("DISPLAY");
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if (!server) // default to tcp/localhost:8000
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server = "tcp/localhost:8000";
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printf("ao_nas: init(): Using audioserver %s\n", server);
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nas_data->aud = AuOpenServer(server, 0, NULL, 0, NULL, NULL);
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if (!nas_data->aud){
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printf("ao_nas: init(): Can't open nas audio server -> nosound\n");
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return 0;
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}
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nas_data->dev = nas_find_device(nas_data->aud, channels);
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if ((nas_data->dev == AuNone) || (!(nas_data->flow = AuCreateFlow(nas_data->aud, NULL)))) {
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printf("ao_nas: init(): Can't find a device serving that many channels -> nosound\n");
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AuCloseServer(nas_data->aud);
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nas_data->aud = 0;
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return 0;
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}
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AuMakeElementImportClient(elms, rate, auformat, channels, AuTrue,
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NAS_BUFFER_SIZE / bytes_per_sample,
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(NAS_BUFFER_SIZE - NAS_FRAG_SIZE) / bytes_per_sample,
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0, NULL);
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AuMakeElementExportDevice(elms+1, 0, nas_data->dev, rate,
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AuUnlimitedSamples, 0, NULL);
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AuSetElements(nas_data->aud, nas_data->flow, AuTrue, 2, elms, &as);
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if (as != AuSuccess)
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nas_print_error(nas_data->aud, "init(): AuSetElements", as);
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AuRegisterEventHandler(nas_data->aud, AuEventHandlerIDMask |
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AuEventHandlerTypeMask,
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AuEventTypeElementNotify, nas_data->flow,
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nas_event_handler, (AuPointer) nas_data);
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AuSetErrorHandler(nas_data->aud, nas_error_handler);
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nas_data->flow_stopped=1;
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pthread_mutex_init(&nas_data->buffer_mutex, NULL);
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pthread_create(&nas_data->event_thread, NULL, &nas_event_thread_start, nas_data);
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return 1;
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}
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// close audio device
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static void uninit(){
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AuStatus as;
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nas_data->stop_thread = 1;
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pthread_join(nas_data->event_thread, NULL);
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if (!nas_data->flow_stopped) {
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AuStopFlow(nas_data->aud, nas_data->flow, &as);
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if (as != AuSuccess)
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nas_print_error(nas_data->aud, "uninit(): AuStopFlow", as);
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}
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AuCloseServer(nas_data->aud);
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nas_data->aud = 0;
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free(nas_data->client_buffer);
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}
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// stop playing and empty buffers (for seeking/pause)
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static void reset(){
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AuStatus as;
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pthread_mutex_lock(&nas_data->buffer_mutex);
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nas_data->client_buffer_used = 0;
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if (!nas_data->flow_stopped) {
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AuStopFlow(nas_data->aud, nas_data->flow, &as);
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if (as != AuSuccess)
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nas_print_error(nas_data->aud, "reset(): AuStopFlow", as);
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nas_data->flow_stopped = 1;
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}
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nas_data->server_buffer_used = 0;
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pthread_mutex_unlock(&nas_data->buffer_mutex);
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}
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// stop playing, keep buffers (for pause)
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static void audio_pause()
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{
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AuStatus as;
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DPRINTF("ao_nas: audio_pause()\n");
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nas_data->flow_paused = 1;
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}
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// resume playing, after audio_pause()
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static void audio_resume()
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{
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AuStatus as;
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AuEvent ev;
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DPRINTF("ao_nas: audio_resume()\n");
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nas_data->flow_stopped = 0;
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nas_data->flow_paused = 0;
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AuStartFlow(nas_data->aud, nas_data->flow, &as);
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if (as != AuSuccess)
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nas_print_error(nas_data->aud, "play(): AuStartFlow", as);
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}
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// return: how many bytes can be played without blocking
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static int get_space()
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{
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int result;
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DPRINTF("ao_nas: get_space()\n");
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pthread_mutex_lock(&nas_data->buffer_mutex);
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result = nas_data->client_buffer_size - nas_data->client_buffer_used;
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pthread_mutex_unlock(&nas_data->buffer_mutex);
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return result;
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}
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// plays 'len' bytes of 'data'
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// it should round it down to outburst*n
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// return: number of bytes played
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static int play(void* data,int len,int flags)
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{
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int maxbursts, playbursts, writelen;
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AuStatus as;
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DPRINTF("ao_nas: play()\n");
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if (nas_data->flow_stopped) {
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AuEvent ev;
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AuStartFlow(nas_data->aud, nas_data->flow, &as);
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if (as != AuSuccess)
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nas_print_error(nas_data->aud, "play(): AuStartFlow", as);
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nas_data->flow_stopped = 0;
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while (!nas_empty_event_queue(nas_data)); // wait for first buffer underrun event
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}
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pthread_mutex_lock(&nas_data->buffer_mutex);
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maxbursts = (nas_data->client_buffer_size -
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nas_data->client_buffer_used) / ao_data.outburst;
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playbursts = len / ao_data.outburst;
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writelen = (playbursts > maxbursts ? maxbursts : playbursts) *
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ao_data.outburst;
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pthread_mutex_unlock(&nas_data->buffer_mutex);
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nas_writeBuffer(nas_data, data, writelen);
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return writelen;
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}
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// return: delay in seconds between first and last sample in buffer
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static float get_delay()
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{
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float result;
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DPRINTF("ao_nas: get_delay()\n");
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pthread_mutex_lock(&nas_data->buffer_mutex);
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result = ((float)(nas_data->client_buffer_used +
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nas_data->server_buffer_used)) /
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(float)ao_data.bps;
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pthread_mutex_unlock(&nas_data->buffer_mutex);
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return result;
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}
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