本文整理汇总了C++中BMediaTrack::GetCodecInfo方法的典型用法代码示例。如果您正苦于以下问题：C++ BMediaTrack::GetCodecInfo方法的具体用法？C++ BMediaTrack::GetCodecInfo怎么用？C++ BMediaTrack::GetCodecInfo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::GetCodecInfo方法的3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: MessageReceived
void LeftList::MessageReceived(BMessage* msg)
{
struct AudioInfo fAudioInfo;
BMediaFile* testfile;
bool fIsAudio = false;
BMediaTrack* track;
media_codec_info codecInfo;
media_format format;
memset(&format, 0, sizeof(format));
entry_ref ref;
int32 counter = 0;
switch (msg->what) {
case B_SIMPLE_DATA:
while (msg->FindRef("refs", counter++, &ref) == B_OK) {
if ((testfile = new BMediaFile(&ref)) != NULL) {
testfile->InitCheck();
track = testfile->TrackAt(0);
if (track != NULL) {
track->EncodedFormat(&format);
if (format.IsAudio()) {
memset(&format, 0, sizeof(format));
format.type = B_MEDIA_RAW_AUDIO;
track->DecodedFormat(&format);
fAudioInfo.total_time = track->Duration();
media_raw_audio_format* raf = &(format.u.raw_audio);
fAudioInfo.bps = (int32)(raf->format & 0xf);
fAudioInfo.frame_rate = (int32)raf->frame_rate;
fAudioInfo.channels = (int32)raf->channel_count;
track->GetCodecInfo(&codecInfo);
strcpy(fAudioInfo.pretty_name, codecInfo.pretty_name);
strcpy(fAudioInfo.short_name, codecInfo.short_name);
fIsAudio = true;
}
}
} else
WriteLog("MediaFile NULL (file doesnt exists!?)");
delete testfile;
if (fIsAudio) {
if (!strcmp(fAudioInfo.pretty_name, "Raw Audio") && (fAudioInfo.channels == 2) && (fAudioInfo.frame_rate == 44100) && (fAudioInfo.bps == 2))
AddItem(new LeftListItem(&ref, ref.name, fAudioBitmap, &fAudioInfo));
else {
BAlert* MyAlert = new BAlert("BurnItNow", "You can only burn 16 bits stereo 44.1 kHz Raw Audio files.\n (More audio files will be supported in the future)", "Ok", NULL, NULL, B_WIDTH_AS_USUAL, B_INFO_ALERT);
MyAlert->Go();
}
} else {
BPath temp_path;
BEntry(&ref).GetPath(&temp_path);
jpWindow* win = dynamic_cast<jpWindow*>(Window());
if (win != NULL)
win->SetISOFile((char*)temp_path.Path());
}
}
break;
default:
BListView::MessageReceived(msg);
break;
}
}示例2: audioDone
void
MediaFileInfoView::_GetFileInfo(BString* audioFormat, BString* videoFormat,
BString* audioDetails, BString* videoDetails, BString* duration)
{
fDuration = 0;
if (fMediaFile == NULL)
return;
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 = fMediaFile->CountTracks();
int64 videoFrames = 0;
int64 audioFrames = 0;
for (int32 i = 0; i < tracks && (!audioDone || !videoDone); i++) {
track = fMediaFile->TrackAt(i);
if (track != NULL) {
track->EncodedFormat(&format);
if (format.IsVideo()) {
memset(&format, 0, sizeof(format));
format.type = B_MEDIA_RAW_VIDEO;
track->DecodedFormat(&format);
media_raw_video_format *rvf = &(format.u.raw_video);
track->GetCodecInfo(&codecInfo);
*videoFormat << codecInfo.pretty_name;
videoDuration = track->Duration();
videoFrames = track->CountFrames();
*videoDetails << (int32)format.Width() << "x" << (int32)format.Height()
<< " " << (int32)(rvf->field_rate / rvf->interlace)
<< " fps / " << videoFrames << " frames";
videoDone = true;
} else if (format.IsAudio()) {
memset(&format, 0, sizeof(format));
format.type = B_MEDIA_RAW_AUDIO;
track->DecodedFormat(&format);
media_raw_audio_format *raf = &(format.u.raw_audio);
char bytesPerSample = (char)(raf->format & 0xf);
if (bytesPerSample == 1) {
*audioDetails << "8 bit ";
} else if (bytesPerSample == 2) {
*audioDetails << "16 bit ";
} else {
*audioDetails << bytesPerSample << "byte ";
}
track->GetCodecInfo(&codecInfo);
*audioFormat << codecInfo.pretty_name;
audioDuration = track->Duration();
audioFrames = track->CountFrames();
*audioDetails << (float)(raf->frame_rate / 1000.0f) << " kHz";
if (raf->channel_count == 1) {
*audioDetails << " mono / ";
} else if (raf->channel_count == 2) {
*audioDetails << " stereo / ";
} else {
*audioDetails << (int32)raf->channel_count << " channel / " ;
}
*audioDetails << audioFrames << " frames";
audioDone = true;
}
fMediaFile->ReleaseTrack(track);
}
}
fDuration = MAX(audioDuration, videoDuration);
*duration << (int32)(fDuration / 1000000)
<< " seconds";
}示例3: 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.........