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Commit a25acbc9 authored by Eric Wong's avatar Eric Wong
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rewrite statefile code for audio devices

In the words of the original author, it was 'crappy'. I tend to agree :) The code has also been broken for at least the past few months, and nobody bothered fixing it The previous format it was overly complex: 5 lines to describe each device. The new format is one-line per-device: audio_device_state:%d:%s %d - 0 for disabled, any integer for enabled %s - name of the device as specified in the config file, whitespace and all Incompatibilities: * Output names are now _required_ to be unique. This is required because the new format relies solely on the name of the audio device. Relying on the device IDs internal to MPD was a bad idea anyways since the user usually has none or very little idea how they're generated, and adding a new device or removing one from a config would throw things off completely. This is also just a Good Idea(TM) because it makes things less confusing to users when they see it in their clients. * Output states are not preserved from the previous format. Not a big deal, since the previous code was never officially released. Also, it's been broken for months now, so I doubt anybody would notice :) git-svn-id: https://svn.musicpd.org/mpd/trunk@3928 09075e82-0dd4-0310-85a5-a0d7c8717e4f
parent 6dadabea
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Showing with 91 additions and 108 deletions
src/audio.c
View file @ a25acbc9
......@@ -34,18 +34,10 @@
#include <errno.h>
#include <unistd.h>
/* crappy code by qball */
#define AUDIO_STATE_FILE_DEVICE_START "audio_device_start"
#define AUDIO_STATE_FILE_DEVICE_ID "audio_device_id: "
#define AUDIO_STATE_FILE_DEVICE_ENABLED "audio_device_enabled: "
#define AUDIO_STATE_FILE_DEVICE_NAME "audio_device_name: "
#define AUDIO_STATE_FILE_DEVICE_END "audio_device_end"
#define AUDIO_DEVICE_STATE "audio_device_state:"
#define AUDIO_DEVICE_STATE_LEN 19 /* strlen(AUDIO_DEVICE_STATE) */
#define AUDIO_BUFFER_SIZE 2*MAXPATHLEN
/* /crappy code */
static void saveAudioDevicesState();
static AudioFormat audio_format;
......@@ -104,6 +96,9 @@ void initAudioDriver() {
param = getNextConfigParam(CONF_AUDIO_OUTPUT, param);
do {
AudioOutput *output;
int j;
if(audioOutputArraySize == AUDIO_MAX_DEVICES) {
ERROR("only up to 255 audio output devices are "
"supported");
......@@ -114,14 +109,25 @@ void initAudioDriver() {
audioOutputArray = realloc(audioOutputArray,
audioOutputArraySize*sizeof(AudioOutput *));
audioOutputArray[i] = newAudioOutput(param);
if(!audioOutputArray[i] && param) {
output = newAudioOutput(param);
if(!output && param) {
ERROR("problems configuring output device defined at "
"line %i\n", param->line);
exit(EXIT_FAILURE);
}
/* require output names to be unique: */
for (j = i - 1; j >= 0; --j) {
if ( !strcmp( output->name,
audioOutputArray[j]->name) ) {
ERROR("output devices with identical "
"names: %s\n",
output->name);
exit(EXIT_FAILURE);
}
}
audioOutputArray[i] = output;
} while((param = getNextConfigParam(CONF_AUDIO_OUTPUT, param)));
}
......@@ -221,6 +227,7 @@ void finishAudioConfig() {
void finishAudioDriver() {
int i;
saveAudioDevicesState();
for(i = 0; i < audioOutputArraySize; i++) {
finishAudioOutput(audioOutputArray[i]);
}
......@@ -415,115 +422,97 @@ void printAudioDevices(FILE * fp) {
}
}
/* more qball crappy code */
static char * getStateFile() {
ConfigParam * param = parseConfigFilePath(CONF_STATE_FILE, 0);
if(!param) return NULL;
return param->value;
}
static void saveAudioDevicesState() {
char *stateFile;
FILE *fp;
int i;
if (!(stateFile = getStateFile()))
return;
void saveAudioDevicesState() {
int i;
char * stateFile = getStateFile();
if(stateFile) {
FILE * fp;
while(!(fp = fopen(stateFile,"a")) && errno==EINTR);
if(!fp) {
ERROR("problems opening state file \"%s\" for "
"writing: %s\n", stateFile,
strerror(errno));
return;
}
for(i = 0; i < audioOutputArraySize; i++) {
myfprintf(fp, "%s\n", AUDIO_STATE_FILE_DEVICE_START);
myfprintf(fp, "%s%i\n", AUDIO_STATE_FILE_DEVICE_ID, i);
myfprintf(fp, "%s%s\n", AUDIO_STATE_FILE_DEVICE_NAME, audioOutputArray[i]->name);
myfprintf(fp, "%s%i\n", AUDIO_STATE_FILE_DEVICE_ENABLED,(int)pdAudioDevicesEnabled[i]);
myfprintf(fp, "%s\n", AUDIO_STATE_FILE_DEVICE_END);
}
while(fclose(fp) && errno==EINTR);
while(!(fp = fopen(stateFile,"a")) && errno==EINTR);
if(!fp) {
ERROR("problems opening state file \"%s\" for "
"writing: %s\n", stateFile, strerror(errno));
return;
}
assert(audioOutputArraySize != 0);
for (i = audioOutputArraySize - 1; i >= 0; --i) {
myfprintf(fp, AUDIO_DEVICE_STATE "%d:%s\n",
(int)pdAudioDevicesEnabled[i],
audioOutputArray[i]->name);
}
while(fclose(fp) && errno==EINTR);
}
void readAudioDevicesState() {
char * stateFile = getStateFile();
FILE *fp;
struct stat st;
if(stateFile) {
char buffer[AUDIO_BUFFER_SIZE];
static void parse_audio_device_state(FILE *fp)
{
char buffer[AUDIO_BUFFER_SIZE];
int i;
assert(audioOutputArraySize != 0);
while (myFgets(buffer,AUDIO_BUFFER_SIZE,fp)) {
char *c, *name;
if (strncmp(buffer,AUDIO_DEVICE_STATE,AUDIO_DEVICE_STATE_LEN))
continue;
if(stat(stateFile,&st)<0) {
DEBUG("failed to stat state file\n");
return;
}
if(!S_ISREG(st.st_mode)) {
ERROR("state file \"%s\" is not a regular "
"file\n",stateFile);
exit(EXIT_FAILURE);
}
c = strchr(buffer,':');
if (!c || !(++c))
goto errline;
fp = fopen(stateFile,"r");
if(!fp) {
ERROR("problems opening state file \"%s\" for "
"reading: %s\n", stateFile,
strerror(errno));
exit(EXIT_FAILURE);
}
name = strchr(c,':');
if (!name || !(++name))
goto errline;
while(myFgets(buffer,AUDIO_BUFFER_SIZE,fp)) {
if(strncmp(buffer,AUDIO_STATE_FILE_DEVICE_START, strlen(AUDIO_STATE_FILE_DEVICE_START))==0) {
char *name = NULL;
int id = -1;
int enabled = 1;
if(!myFgets(buffer,AUDIO_BUFFER_SIZE,fp)) {
ERROR("error parsing state file \"%s\"\n", stateFile);
exit(EXIT_FAILURE);
}
while(strcmp(buffer,AUDIO_STATE_FILE_DEVICE_END)) {
if(strncmp(buffer,AUDIO_STATE_FILE_DEVICE_ID, strlen(AUDIO_STATE_FILE_DEVICE_ID)) == 0 ) {
if(strlen(buffer) > strlen(AUDIO_STATE_FILE_DEVICE_ID))
{
id = atoi(&buffer[strlen(AUDIO_STATE_FILE_DEVICE_ID)]);
}
}
if(strncmp(buffer,AUDIO_STATE_FILE_DEVICE_ENABLED, strlen(AUDIO_STATE_FILE_DEVICE_ENABLED)) == 0 ) {
if(strlen(buffer) > strlen(AUDIO_STATE_FILE_DEVICE_ENABLED))
{
enabled = atoi(&buffer[strlen(AUDIO_STATE_FILE_DEVICE_ENABLED)]);
}
}
if(!myFgets(buffer,AUDIO_BUFFER_SIZE,fp)) {
ERROR("error parsing state file \"%s\"\n", stateFile);
exit(EXIT_FAILURE);
}
}
if(id != -1)
{
/* search for same name here, can we trust id? */
if(id < audioOutputArraySize)
{
pdAudioDevicesEnabled[id] = enabled;
}
}
if(name != NULL)
{
free(name);
}
for (i = audioOutputArraySize - 1; i >= 0; --i) {
if (!strcmp(name, audioOutputArray[i]->name)) {
pdAudioDevicesEnabled[i] = atoi(c);
break;
}
}
continue;
errline:
/* nonfatal */
ERROR("invalid line in state_file: %s\n", buffer);
}
}
void readAudioDevicesState() {
char *stateFile;
FILE *fp;
struct stat st;
fclose(fp);
if (!(stateFile = getStateFile()))
return;
if(stat(stateFile,&st)<0) {
DEBUG("failed to stat state file\n");
return;
}
if(!S_ISREG(st.st_mode)) {
ERROR("state file \"%s\" is not a regular file\n",
stateFile);
exit(EXIT_FAILURE);
}
fp = fopen(stateFile,"r");
if(!fp) {
ERROR("problems opening state file \"%s\" for "
"reading: %s\n", stateFile,
strerror(errno));
exit(EXIT_FAILURE);
}
parse_audio_device_state(fp);
fclose(fp);
}
src/audio.h
View file @ a25acbc9
......@@ -75,8 +75,6 @@ int disableAudioDevice(FILE * fp, int device);
void printAudioDevices(FILE * fp);
/* qball's crappy code */
void readAudioDevicesState();
void saveAudioDevicesState();
#endif
src/main.c
View file @ a25acbc9
......@@ -300,7 +300,6 @@ void startMainProcess() {
if(pid>0) {
initInputStream();
initReplayGainState();
/* qball crappy code */
readAudioDevicesState();
/* free stuff we don't need */
......@@ -317,9 +316,6 @@ void startMainProcess() {
finishAudioConfig();
finishAudioDriver();
/* qball crappy code */
saveAudioDevicesState();
finishPaths();
kill(mainPid, SIGTERM);
......
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