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Fix FSB4 MPEG weird padding bug [Mafia II (PS3)]

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This commit is contained in:
bnnm 2018-08-04 20:40:02 +02:00
parent ffe7de0acc
commit 6384b91f8f
1 changed files with 25 additions and 4 deletions
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29
src/coding/mpeg_custom_utils.c
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@ -127,12 +127,33 @@ int mpeg_custom_parse_frame_default(VGMSTREAMCHANNEL *stream, mpeg_codec_data *d
goto fail;
current_data_size = info.frame_size;
/* get FSB padding for Layer III or multichannel Layer II (Layer I doesn't seem to be supported)
/* get FSB padding for Layer III or multichannel Layer II (Layer I isn't supported by FMOD).
* Padding sometimes contains garbage like the next frame header so we can't feed it to mpg123 or it gets confused. */
if ((info.layer == 3 && data->config.fsb_padding) || data->config.fsb_padding == 16) {
current_padding = (current_data_size % data->config.fsb_padding)
? data->config.fsb_padding - (current_data_size % data->config.fsb_padding)
: 0;
/* Rare Mafia II (PS3) bug (GP_0701_music multilang only): some frame paddings "4" are incorrect,
* calcs give 0xD0+0x00 but need 0xD0+0x04 (unlike all other fsbs, which never do that).
* FMOD tools decode fine, so they may be doing special detection too, since even
* re-encoding the same file and using the same FSB flags/modes won't trigger the bug. */
if (info.layer == 3 && data->config.fsb_padding == 4 && current_data_size == 0xD0) {
uint32_t next_header;
off_t next_offset;
next_offset = stream->offset + current_data_size + current_padding;
if (current_interleave && ((next_offset - stream->channel_start_offset + current_interleave_pre + current_interleave_post) % current_interleave == 0)) {
next_offset += current_interleave_pre + current_interleave_post;
}
next_header = read_32bitBE(next_offset, stream->streamfile);
if ((next_header & 0xFFE00000) != 0xFFE00000) { /* doesn't land in a proper frame, fix sizes and hope */
VGM_LOG_ONCE("MPEG FSB: stream with wrong padding found\n");
current_padding = 0x04;
}
}
}
VGM_ASSERT(data->streams_size > 1 && current_interleave != current_data_size+current_padding,
@ -267,9 +288,9 @@ int mpeg_get_frame_info(STREAMFILE *streamfile, off_t offset, mpeg_frame_info *
/* calculate frame length (from hcs's fsb_mpeg) */
switch (info->frame_samples) {
case 384: info->frame_size = (12l * info->bit_rate * 1000l / info->sample_rate + padding) * 4; break;
case 576: info->frame_size = (72l * info->bit_rate * 1000l / info->sample_rate + padding); break;
case 1152: info->frame_size = (144l * info->bit_rate * 1000l / info->sample_rate + padding); break;
case 384: info->frame_size = (12l * info->bit_rate * 1000l / info->sample_rate + padding) * 4; break; /* 384/32 = 12 */
case 576: info->frame_size = (72l * info->bit_rate * 1000l / info->sample_rate + padding); break; /* 576/8 = 72 */
case 1152: info->frame_size = (144l * info->bit_rate * 1000l / info->sample_rate + padding); break; /* 1152/8 = 144 */
default: goto fail;
}