* limitations under the License.
*/
+#include <assert.h>
+#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define INITIAL_RATE 2000 // 2x normal playback speed
+// These are extensions to OpenSL ES 1.0.1 values
+
+#define SL_PREFETCHSTATUS_UNKNOWN 0
+#define SL_PREFETCHSTATUS_ERROR (-1)
+
+// Mutex and condition shared with main program to protect prefetch_status
+
+static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
+SLuint32 prefetch_status = SL_PREFETCHSTATUS_UNKNOWN;
+
+/* used to detect errors likely to have occured when the OpenSL ES framework fails to open
+ * a resource, for instance because a file URI is invalid, or an HTTP server doesn't respond.
+ */
+#define PREFETCHEVENT_ERROR_CANDIDATE \
+ (SL_PREFETCHEVENT_STATUSCHANGE | SL_PREFETCHEVENT_FILLLEVELCHANGE)
+
//-----------------------------------------------------------------
//* Exits the application if an error is encountered */
#define CheckErr(x) ExitOnErrorFunc(x,__LINE__)
/* slow playback down by 2x for next loop, if possible */
SLpermille minRate, maxRate, stepSize, rate = 1000;
SLuint32 capa;
- SLPlaybackRateItf* pRateItf = (SLPlaybackRateItf*)pContext;
- SLresult res = (**pRateItf)->GetRate(*pRateItf, &rate); CheckErr(res);
- res = (**pRateItf)->GetRateRange(*pRateItf, 0, &minRate, &maxRate, &stepSize, &capa);
+ assert(NULL != pContext);
+ SLPlaybackRateItf pRateItf = (SLPlaybackRateItf)pContext;
+ SLresult res = (*pRateItf)->GetRate(pRateItf, &rate); CheckErr(res);
+ res = (*pRateItf)->GetRateRange(pRateItf, 0, &minRate, &maxRate, &stepSize, &capa);
CheckErr(res);
fprintf(stdout, "old rate = %d, minRate=%d, maxRate=%d\n", rate, minRate, maxRate);
rate /= 2;
rate = minRate;
}
fprintf(stdout, "new rate = %d\n", rate);
- res = (**pRateItf)->SetRate(*pRateItf, rate); CheckErr(res);
+ res = (*pRateItf)->SetRate(pRateItf, rate); CheckErr(res);
+ if (res == SL_RESULT_FEATURE_UNSUPPORTED) {
+ fprintf(stderr, "new playback rate %d per mille is unsupported\n", rate);
+ } else {
+ CheckErr(res);
+ }
}
if (event & SL_PLAYEVENT_HEADATMARKER) {
fprintf(stdout, "SL_PLAYEVENT_HEADATMARKER ");
/* PrefetchStatusItf callback for an audio player */
void PrefetchEventCallback( SLPrefetchStatusItf caller, void *pContext, SLuint32 event)
{
+ //fprintf(stdout, "\t\tPrefetchEventCallback: received event %u\n", event);
+ SLresult result;
+ assert(pContext == NULL);
SLpermille level = 0;
- (*caller)->GetFillLevel(caller, &level);
+ result = (*caller)->GetFillLevel(caller, &level);
+ CheckErr(result);
SLuint32 status;
- //fprintf(stdout, "\t\tPrefetchEventCallback: received event %u\n", event);
- (*caller)->GetPrefetchStatus(caller, &status);
- if ((event & (SL_PREFETCHEVENT_STATUSCHANGE|SL_PREFETCHEVENT_FILLLEVELCHANGE))
- && (level == 0) && (status == SL_PREFETCHSTATUS_UNDERFLOW)) {
- fprintf(stdout, "\t\tPrefetchEventCallback: Error while prefetching data, exiting\n");
- //exit(EXIT_FAILURE);
- }
+ result = (*caller)->GetPrefetchStatus(caller, &status);
+ CheckErr(result);
if (event & SL_PREFETCHEVENT_FILLLEVELCHANGE) {
fprintf(stdout, "\t\tPrefetchEventCallback: Buffer fill level is = %d\n", level);
}
if (event & SL_PREFETCHEVENT_STATUSCHANGE) {
fprintf(stdout, "\t\tPrefetchEventCallback: Prefetch Status is = %u\n", status);
}
-
+ SLuint32 new_prefetch_status;
+ if ((event & PREFETCHEVENT_ERROR_CANDIDATE) == PREFETCHEVENT_ERROR_CANDIDATE
+ && level == 0 && status == SL_PREFETCHSTATUS_UNDERFLOW) {
+ fprintf(stdout, "\t\tPrefetchEventCallback: Error while prefetching data, exiting\n");
+ new_prefetch_status = SL_PREFETCHSTATUS_ERROR;
+ } else if (event == SL_PREFETCHEVENT_STATUSCHANGE &&
+ status == SL_PREFETCHSTATUS_SUFFICIENTDATA) {
+ new_prefetch_status = status;
+ } else {
+ return;
+ }
+ int ok;
+ ok = pthread_mutex_lock(&mutex);
+ assert(ok == 0);
+ prefetch_status = new_prefetch_status;
+ ok = pthread_cond_signal(&cond);
+ assert(ok == 0);
+ ok = pthread_mutex_unlock(&mutex);
+ assert(ok == 0);
}
+// Display rate capabilities in a nicely formatted way
+
+void printCapabilities(SLuint32 capabilities)
+{
+ bool needBar = false;
+ printf("0x%x (", capabilities);
+#define _(x) \
+ if (capabilities & SL_RATEPROP_##x) { \
+ if (needBar) \
+ printf("|"); \
+ printf("SL_RATEPROP_" #x); \
+ needBar = true; \
+ capabilities &= ~SL_RATEPROP_##x; \
+ }
+ _(SILENTAUDIO)
+ _(STAGGEREDAUDIO)
+ _(NOPITCHCORAUDIO)
+ _(PITCHCORAUDIO)
+ if (capabilities != 0) {
+ if (needBar)
+ printf("|");
+ printf("0x%x", capabilities);
+ needBar = true;
+ }
+ if (!needBar)
+ printf("N/A");
+ printf(")");
+}
//-----------------------------------------------------------------
res = (*player)->GetInterface(player, SL_IID_PREFETCHSTATUS, (void*)&prefetchItf);
CheckErr(res);
- res = (*prefetchItf)->RegisterCallback(prefetchItf, PrefetchEventCallback, &prefetchItf);
+ res = (*prefetchItf)->RegisterCallback(prefetchItf, PrefetchEventCallback, NULL);
CheckErr(res);
res = (*prefetchItf)->SetCallbackEventsMask(prefetchItf,
SL_PREFETCHEVENT_FILLLEVELCHANGE | SL_PREFETCHEVENT_STATUSCHANGE); CheckErr(res);
res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_TRUE, 0, SL_TIME_UNKNOWN); CheckErr(res);
/* Set up marker and position callbacks */
- res = (*playItf)->RegisterCallback(playItf, PlayEventCallback, &rateItf); CheckErr(res);
+ res = (*playItf)->RegisterCallback(playItf, PlayEventCallback, (void *) rateItf); CheckErr(res);
res = (*playItf)->SetCallbackEventsMask(playItf,
SL_PLAYEVENT_HEADATEND | SL_PLAYEVENT_HEADATMARKER | SL_PLAYEVENT_HEADATNEWPOS);
res = (*playItf)->SetMarkerPosition(playItf, 1500); CheckErr(res);
res = (*playItf)->SetPositionUpdatePeriod(playItf, 500); CheckErr(res);
+ /* Get the default rate */
+ SLpermille rate = 1234;
+ res = (*rateItf)->GetRate(rateItf, &rate); CheckErr(res);
+ printf("default rate = %d per mille\n", rate);
+ assert(1000 == rate);
+
+ /* Get the default rate properties */
+ SLuint32 properties = 0;
+ res = (*rateItf)->GetProperties(rateItf, &properties); CheckErr(res);
+ printf("default rate properties: ");
+ printCapabilities(properties);
+ printf("\n");
+ assert(SL_RATEPROP_NOPITCHCORAUDIO == properties);
+
+ /* Get all supported playback rate ranges */
+ SLuint8 index;
+ for (index = 0; ; ++index) {
+ SLpermille minRate, maxRate, stepSize;
+ SLuint32 capabilities;
+ res = (*rateItf)->GetRateRange(rateItf, index, &minRate, &maxRate, &stepSize, &capabilities);
+ if (res == SL_RESULT_PARAMETER_INVALID) {
+ if (index == 0) {
+ fprintf(stderr, "implementation supports no rate ranges\n");
+ }
+ break;
+ }
+ CheckErr(res);
+ if (index == 255) {
+ fprintf(stderr, "implementation supports way too many rate ranges, I'm giving up\n");
+ break;
+ }
+ printf("range[%u]: min=%d, max=%d, capabilities=", index, minRate, maxRate);
+ printCapabilities(capabilities);
+ printf("\n");
+ }
+
/* Change the playback rate before playback */
- res = (*rateItf)->SetRate(rateItf, INITIAL_RATE); CheckErr(res);
+ res = (*rateItf)->SetRate(rateItf, INITIAL_RATE);
+ if (res == SL_RESULT_FEATURE_UNSUPPORTED || res == SL_RESULT_PARAMETER_INVALID) {
+ fprintf(stderr, "initial playback rate %d per mille is unsupported\n", INITIAL_RATE);
+ } else {
+ CheckErr(res);
+ }
/******************************************************/
/* Play the URI */
/* first cause the player to prefetch the data */
res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PAUSED ); CheckErr(res);
- /* wait until there's data to play */
- SLuint32 prefetchStatus = SL_PREFETCHSTATUS_UNDERFLOW;
- SLuint32 timeOutIndex = 100; // 10s
- while ((prefetchStatus != SL_PREFETCHSTATUS_SUFFICIENTDATA) && (timeOutIndex > 0)) {
- usleep(100 * 1000);
- (*prefetchItf)->GetPrefetchStatus(prefetchItf, &prefetchStatus);
- timeOutIndex--;
+ // wait for prefetch status callback to indicate either sufficient data or error
+ pthread_mutex_lock(&mutex);
+ while (prefetch_status == SL_PREFETCHSTATUS_UNKNOWN) {
+ pthread_cond_wait(&cond, &mutex);
}
-
- if (timeOutIndex == 0) {
- fprintf(stderr, "\nWe\'re done waiting, failed to prefetch data in time, exiting\n");
+ pthread_mutex_unlock(&mutex);
+ if (prefetch_status == SL_PREFETCHSTATUS_ERROR) {
+ fprintf(stderr, "Error during prefetch, exiting\n");
goto destroyRes;
}
fprintf(stdout, "Content duration is %u ms (after prefetch completed)\n", durationInMsec);
}
+ /* Start playing */
fprintf(stdout, "starting to play\n");
res = (*playItf)->SetPlayState( playItf, SL_PLAYSTATE_PLAYING ); CheckErr(res);
/* Wait as long as the duration of the content, times the repetitions,
* before stopping the loop */
+#if 1
usleep( (REPETITIONS-1) * durationInMsec * 1100);
+#else
+ int ii;
+ for (ii = 0; ii < REPETITIONS; ++ii) {
+ usleep(durationInMsec * 1100);
+ PlayEventCallback(playItf, (void *) rateItf, SL_PLAYEVENT_HEADATEND);
+ }
+#endif
+
res = (*seekItf)->SetLoop(seekItf, SL_BOOLEAN_FALSE, 0, SL_TIME_UNKNOWN); CheckErr(res);
fprintf(stdout, "As of now, stopped looping (sound shouldn't repeat from now on)\n");
/* wait some more to make sure it doesn't repeat */
OSDN Git Service
