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Fix mpeg state not properly resetting in some cases

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This commit is contained in:
bnnm 2019-02-16 01:23:43 +01:00
parent ba0345ceb6
commit ed281e1c2e
1 changed files with 12 additions and 31 deletions
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43
src/coding/mpeg_decoder.c
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@ -509,42 +509,37 @@ void free_mpeg(mpeg_codec_data *data) {
/* seeks stream to 0 */
void reset_mpeg(VGMSTREAM *vgmstream) {
off_t input_offset;
mpeg_codec_data *data = vgmstream->codec_data;
if (!data) return;
flush_mpeg(data);
#if 0
/* flush_mpeg properly resets mpg123 with mpg123_open_feed, and
* offsets are reset in the VGMSTREAM externally, but for posterity: */
if (!data->custom) {
off_t input_offset = 0;
mpg123_feedseek(data->m,0,SEEK_SET,&input_offset);
/* input_offset is ignored as we can assume it will be 0 for a seek to sample 0 */
}
else {
off_t input_offset = 0;
int i;
/* re-start from 0 */
for (i = 0; i < data->streams_size; i++) {
mpg123_feedseek(data->streams[i]->m,0,SEEK_SET,&input_offset);
data->streams[i]->bytes_in_buffer = 0;
data->streams[i]->buffer_full = 0;
data->streams[i]->buffer_used = 0;
data->streams[i]->samples_filled = 0;
data->streams[i]->samples_used = 0;
data->streams[i]->current_size_count = 0;
data->streams[i]->current_size_target = 0;
data->streams[i]->decode_to_discard = 0;
}
data->samples_to_discard = data->skip_samples; /* initial delay */
}
#endif
}
/* seeks to a point */
void seek_mpeg(VGMSTREAM *vgmstream, int32_t num_sample) {
off_t input_offset;
mpeg_codec_data *data = vgmstream->codec_data;
if (!data) return;
flush_mpeg(data);
if (!data->custom) {
off_t input_offset = 0;
mpg123_feedseek(data->m, num_sample,SEEK_SET,&input_offset);
/* adjust loop with mpg123's offset (useful?) */
@ -553,31 +548,17 @@ void seek_mpeg(VGMSTREAM *vgmstream, int32_t num_sample) {
}
else {
int i;
/* re-start from 0 */
/* restart from 0 and manually discard samples, since we don't really know the correct offset */
for (i = 0; i < data->streams_size; i++) {
mpg123_feedseek(data->streams[i]->m,0,SEEK_SET,&input_offset);
data->streams[i]->bytes_in_buffer = 0;
data->streams[i]->buffer_full = 0;
data->streams[i]->buffer_used = 0;
data->streams[i]->samples_filled = 0;
data->streams[i]->samples_used = 0;
data->streams[i]->current_size_count = 0;
data->streams[i]->current_size_target = 0;
data->streams[i]->decode_to_discard = 0;
//mpg123_feedseek(data->streams[i]->m,0,SEEK_SET,&input_offset); /* already reset */
/* force first offset as discard-looping needs to start from the beginning */
if (vgmstream->loop_ch)
vgmstream->loop_ch[i].offset = vgmstream->loop_ch[i].channel_start_offset;
}
/* manually discard samples, since we don't really know the correct offset */
data->samples_to_discard = num_sample;
data->samples_to_discard += data->skip_samples;
data->samples_to_discard += num_sample;
}
data->bytes_in_buffer = 0;
data->buffer_full = 0;
data->buffer_used = 0;
}
/* resets mpg123 decoder and its internals without seeking, useful when a new MPEG substream starts */