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Don't manually check framesRead and rely on FFmpeg's EOFs

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FFmpeg's duration isn't always reliable (ie. bad headers) and the
decoder detects EOFs already, extra decoding attempts should be ignored.
This way vgmstream can use other values without modifying
ffmpeg_codec_data's state.
This commit is contained in:
bnnm 2016-12-03 11:42:38 +01:00
parent 80c8791288
commit 0faa3286aa
3 changed files with 3 additions and 15 deletions
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16
src/coding/ffmpeg_decoder.c
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@ -59,8 +59,7 @@ static void convert_audio(sample *outbuf, const uint8_t *inbuf, int sampleCount,
}
}
void decode_ffmpeg(VGMSTREAM *vgmstream,
sample * outbuf, int32_t samples_to_do, int channels) {
void decode_ffmpeg(VGMSTREAM *vgmstream, sample * outbuf, int32_t samples_to_do, int channels) {
ffmpeg_codec_data *data = (ffmpeg_codec_data *) vgmstream->codec_data;
int bytesPerSample;
@ -87,7 +86,7 @@ void decode_ffmpeg(VGMSTREAM *vgmstream,
/* ignore decode attempts at EOF */
if ((data->totalFrames && data->framesRead >= data->totalFrames) || data->endOfStream || data->endOfAudio) {
if (data->endOfStream || data->endOfAudio) {
memset(outbuf, 0, samples_to_do * channels * sizeof(sample));
return;
}
@ -231,11 +230,6 @@ void decode_ffmpeg(VGMSTREAM *vgmstream,
end:
framesReadNow = bytesRead / frameSize;
if (data->totalFrames && (data->framesRead + framesReadNow > data->totalFrames)) {
framesReadNow = (int)(data->totalFrames - data->framesRead);
}
data->framesRead += framesReadNow;
// Convert the audio
convert_audio(outbuf, data->sampleBuffer, framesReadNow * channels, data->bitsPerSample, data->floatingPoint);
@ -259,7 +253,6 @@ void reset_ffmpeg(VGMSTREAM *vgmstream) {
}
data->readNextPacket = 1;
data->bytesConsumedFromDecodedFrame = INT_MAX;
data->framesRead = 0;
data->endOfStream = 0;
data->endOfAudio = 0;
data->samplesToDiscard = 0;
@ -286,11 +279,9 @@ void seek_ffmpeg(VGMSTREAM *vgmstream, int32_t num_sample) {
/* todo fix this properly */
if (data->totalFrames) {
data->framesRead = (int)ts;
ts = data->framesRead * (data->formatCtx->duration) / data->totalFrames;
ts = (int)ts * (data->formatCtx->duration) / data->totalFrames;
} else {
data->samplesToDiscard = num_sample;
data->framesRead = 0;
ts = 0;
}
@ -303,7 +294,6 @@ void seek_ffmpeg(VGMSTREAM *vgmstream, int32_t num_sample) {
/* We could also seek by offset (AVSEEK_FLAG_BYTE) to the frame closest to the loop then discard
* some samples, which is fast but would need calculations per format / when frame size is not constant */
data->samplesToDiscard = num_sample;
data->framesRead = 0;
ts = 0;
avformat_seek_file(data->formatCtx, data->streamIndex, ts, ts, ts, AVSEEK_FLAG_ANY);

1
src/meta/ffmpeg.c
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@ -332,7 +332,6 @@ ffmpeg_codec_data * init_ffmpeg_faux_riff(STREAMFILE *streamFile, int64_t fmt_of
}
data->bitrate = (int)(data->codecCtx->bit_rate);
data->framesRead = 0;
data->endOfStream = 0;
data->endOfAudio = 0;

1
src/vgmstream.h
View File

@ -870,7 +870,6 @@ typedef struct {
int floatingPoint;
int sampleRate;
int64_t totalFrames; // sample count, or 0 if unknown
int64_t framesRead;
int bitrate;
// Intermediate buffer