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Fix mpeg_bytes_to_samples in newer libmpg123, by saving initial info

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This commit is contained in:
bnnm 2017-12-03 17:24:32 +01:00
parent c60efdfbdf
commit 48795333e1
3 changed files with 9 additions and 10 deletions
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1
src/coding/coding.h
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@ -177,7 +177,6 @@ void free_mpeg(mpeg_codec_data *data);
void flush_mpeg(mpeg_codec_data * data);
long mpeg_bytes_to_samples(long bytes, const mpeg_codec_data *data);
void mpeg_set_error_logging(mpeg_codec_data * data, int enable);
#endif
#ifdef VGM_USE_G7221

17
src/coding/mpeg_decoder.c
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@ -101,6 +101,8 @@ mpeg_codec_data *init_mpeg_codec_data(STREAMFILE *streamfile, off_t start_offset
if (channels_per_frame != channels)
goto fail;
/* copy current as open_feed may invalidate until data is fed */
memcpy(&data->mi, &mi, sizeof(struct mpg123_frameinfo));
/* reinit, to ignore the reading done */
mpg123_open_feed(main_m);
@ -592,23 +594,20 @@ void flush_mpeg(mpeg_codec_data * data) {
long mpeg_bytes_to_samples(long bytes, const mpeg_codec_data *data) {
/* if not found just return 0 and expect to fail (if used for num_samples) */
if (!data->custom) {
struct mpg123_frameinfo mi;
mpg123_handle *m = data->m;
if (m == NULL || MPG123_OK != mpg123_info(m, &mi))
return 0;
/* We would need to read all VBR frames headers to count samples */
if (mi.vbr != MPG123_CBR) //maybe abr_rate could be used to get an approx
if (data->mi.vbr != MPG123_CBR) { //maybe abr_rate could be used to get an approx
VGM_LOG("MPEG: vbr mp3 can't do bytes_to_samples\n");
return 0;
}
return (int64_t)bytes * mi.rate * 8 / (mi.bitrate * 1000);
return (int64_t)bytes * data->mi.rate * 8 / (data->mi.bitrate * 1000);
}
else {
return 0; /* a bit too complex for what is worth */
}
}
#if 0
/* disables/enables stderr output, for MPEG known to contain recoverable errors */
void mpeg_set_error_logging(mpeg_codec_data * data, int enable) {
if (!data->custom) {
@ -621,5 +620,5 @@ void mpeg_set_error_logging(mpeg_codec_data * data, int enable) {
}
}
}
#endif
#endif

1
src/vgmstream.h
View File

@ -934,6 +934,7 @@ typedef struct {
int buffer_full; /* raw buffer has been filled */
int buffer_used; /* raw buffer has been fed to the decoder */
mpg123_handle *m; /* MPEG decoder */
struct mpg123_frameinfo mi; /* start info, so it's available even when resetting */
/* for internal use, assumed to be constant for all frames */
int channels_per_frame;