本文整理汇总了C++中BMediaTrack::InitCheck方法的典型用法代码示例。如果您正苦于以下问题：C++ BMediaTrack::InitCheck方法的具体用法？C++ BMediaTrack::InitCheck怎么用？C++ BMediaTrack::InitCheck使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类BMediaTrack的用法示例。
在下文中一共展示了BMediaTrack::InitCheck方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: audioDone
status_t
MediaFileInfo::LoadInfo(BMediaFile* file)
{
_Reset();
if (!file)
return B_BAD_VALUE;
BMediaTrack* track;
media_format format;
memset(&format, 0, sizeof(format));
media_codec_info codecInfo;
bool audioDone(false), videoDone(false);
bigtime_t audioDuration = 0;
bigtime_t videoDuration = 0;
int32 tracks = file->CountTracks();
int64 videoFrames = 0;
int64 audioFrames = 0;
status_t ret = B_OK;
for (int32 i = 0; i < tracks && (!audioDone || !videoDone); i++) {
track = file->TrackAt(i);
if (track == NULL)
return B_ERROR;
ret = track->InitCheck();
if (ret != B_OK)
return ret;
ret = track->EncodedFormat(&format);
if (ret != B_OK)
return ret;
if (format.IsVideo()) {
memset(&format, 0, sizeof(format));
format.type = B_MEDIA_RAW_VIDEO;
ret = track->DecodedFormat(&format);
if (ret != B_OK)
return ret;
media_raw_video_format *rvf = &(format.u.raw_video);
ret = track->GetCodecInfo(&codecInfo);
if (ret != B_OK)
return ret;
video.format << codecInfo.pretty_name;
videoDuration = track->Duration();
videoFrames = track->CountFrames();
BString details;
snprintf(details.LockBuffer(256), 256,
B_TRANSLATE_COMMENT("%u x %u, %.2ffps / %Ld frames",
"Width x Height, fps / frames"),
format.Width(), format.Height(),
rvf->field_rate / rvf->interlace, videoFrames);
details.UnlockBuffer();
video.details << details;
videoDone = true;
} else if (format.IsAudio()) {
memset(&format, 0, sizeof(format));
format.type = B_MEDIA_RAW_AUDIO;
ret = track->DecodedFormat(&format);
if (ret != B_OK)
return ret;
media_raw_audio_format *raf = &(format.u.raw_audio);
char bytesPerSample = (char)(raf->format & 0xf);
BString details;
if (bytesPerSample == 1 || bytesPerSample == 2) {
snprintf(details.LockBuffer(16), 16,
B_TRANSLATE("%d bit "), bytesPerSample * 8);
} else {
snprintf(details.LockBuffer(16), 16,
B_TRANSLATE("%d byte "), bytesPerSample);
}
details.UnlockBuffer();
audio.details << details;
ret = track->GetCodecInfo(&codecInfo);
if (ret != B_OK)
return ret;
audio.format << codecInfo.pretty_name;
audioDuration = track->Duration();
audioFrames = track->CountFrames();
BString channels;
if (raf->channel_count == 1) {
snprintf(channels.LockBuffer(64), 64,
B_TRANSLATE("%.1f kHz mono / %lld frames"),
raf->frame_rate / 1000.f, audioFrames);
} else if (raf->channel_count == 2) {
snprintf(channels.LockBuffer(64), 64,
B_TRANSLATE("%.1f kHz stereo / %lld frames"),
raf->frame_rate / 1000.f, audioFrames);
} else {
snprintf(channels.LockBuffer(64), 64,
B_TRANSLATE("%.1f kHz %ld channel / %lld frames"),
raf->frame_rate / 1000.f, raf->channel_count, audioFrames);
//.........这里部分代码省略.........