mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-24 12:24:50 +01:00
88 lines
3.2 KiB
C
88 lines
3.2 KiB
C
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#include "meta.h"
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#include "../coding/coding.h"
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/* XWMA - Microsoft WMA container [The Elder Scrolls: Skyrim (PC/X360), Hydrophobia (PC)] */
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VGMSTREAM * init_vgmstream_xwma(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t fmt_offset, data_offset, first_offset = 0xc;
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size_t fmt_size, data_size;
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int loop_flag, channel_count;
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/* checks */
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/* .xwma: standard
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* .xwm: The Elder Scrolls: Skyrim (PC), Blade Arcus from Shining (PC) */
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if (!check_extensions(streamFile, "xwma,xwm"))
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x52494646) /* "RIFF" */
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goto fail;
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if (read_32bitBE(0x08,streamFile) != 0x58574D41) /* "XWMA" */
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goto fail;
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if ( !find_chunk_le(streamFile, 0x666d7420,first_offset,0, &fmt_offset,&fmt_size) ) /* "fmt "*/
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goto fail;
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if ( !find_chunk_le(streamFile, 0x64617461,first_offset,0, &data_offset,&data_size) ) /* "data"*/
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goto fail;
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channel_count = read_16bitLE(fmt_offset+0x02,streamFile);
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loop_flag = 0;
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channel_count, loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->sample_rate = read_32bitLE(fmt_offset+0x04, streamFile);
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vgmstream->meta_type = meta_XWMA;
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/* the main purpose of this meta is redoing the XWMA header to:
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* - redo header to fix XWMA with buggy bit rates so FFmpeg can play them ok
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* - skip seek table to fix FFmpeg buggy XWMA seeking (see init_seek)
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* - read num_samples correctly
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*/
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#ifdef VGM_USE_FFMPEG
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{
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uint8_t buf[0x100];
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int bytes, avg_bps, block_align, wma_codec;
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avg_bps = read_32bitLE(fmt_offset+0x08, streamFile);
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block_align = (uint16_t)read_16bitLE(fmt_offset+0x0c, streamFile);
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wma_codec = (uint16_t)read_16bitLE(fmt_offset+0x00, streamFile);
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bytes = ffmpeg_make_riff_xwma(buf,0x100, wma_codec, data_size, vgmstream->channels, vgmstream->sample_rate, avg_bps, block_align);
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vgmstream->codec_data = init_ffmpeg_header_offset(streamFile, buf,bytes, data_offset,data_size);
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if (!vgmstream->codec_data) goto fail;
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vgmstream->coding_type = coding_FFmpeg;
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vgmstream->layout_type = layout_none;
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/* manually find total samples, why don't they put this in the header is beyond me */
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{
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ms_sample_data msd = {0};
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msd.channels = vgmstream->channels;
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msd.data_offset = data_offset;
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msd.data_size = data_size;
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if (wma_codec == 0x0162)
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wmapro_get_samples(&msd, streamFile, block_align, vgmstream->sample_rate,0x00E0);
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else
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wma_get_samples(&msd, streamFile, block_align, vgmstream->sample_rate,0x001F);
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vgmstream->num_samples = msd.num_samples;
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if (vgmstream->num_samples == 0)
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vgmstream->num_samples = (int32_t)((ffmpeg_codec_data*)vgmstream->codec_data)->totalSamples; /* from avg-br */
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//num_samples seem to be found in the last "seek" table entry too, as: entry / channels / 2
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}
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}
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#else
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goto fail;
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#endif
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return vgmstream;
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fail:
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close_vgmstream(vgmstream);
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return NULL;
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}
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