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NicknineTheEagle
parent
02d3c3f875
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42842898dd
@ -3,83 +3,83 @@
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/* .APM - seen in old Ubisoft games [Rayman 2: The Great Escape (PC), Donald Duck: Goin' Quackers (PC)] */
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VGMSTREAM* init_vgmstream_ubi_apm(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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uint32_t channels, sample_rate, file_size, nibble_size;
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off_t start_offset;
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int loop_flag;
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uint32_t i;
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VGMSTREAM* vgmstream = NULL;
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uint32_t channels, sample_rate, file_size, nibble_size;
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off_t start_offset;
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int loop_flag;
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uint32_t i;
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if (read_u16le(0x00, sf) != 0x2000 || !is_id32be(0x14, sf, "vs12"))
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goto fail;
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if (read_u16le(0x00, sf) != 0x2000 || !is_id32be(0x14, sf, "vs12"))
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goto fail;
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if (!check_extensions(sf, "apm"))
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goto fail;
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if (!check_extensions(sf, "apm"))
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goto fail;
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/* (info from https://github.com/Synthesis/ray2get)
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* 0x00(2): format tag (0x2000 for Ubisoft ADPCM)
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* 0x02(2): channels
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* 0x04(4): sample rate
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* 0x08(4): byte rate? PCM samples?
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* 0x0C(2): block align
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* 0x0E(2): bits per sample
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* 0x10(4): header size
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* 0x14(4): "vs12"
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* 0x18(4): file size
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* 0x1C(4): nibble size
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* 0x20(4): -1?
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* 0x24(4): 0?
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* 0x28(4): high/low nibble flag (when loaded in memory)
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* 0x2C(N): ADPCM info per channel, last to first
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* - 0x00(4): ADPCM hist
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* - 0x04(4): ADPCM step index
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* - 0x08(4): copy of ADPCM data (after interleave, ex. R from data + 0x01)
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* 0x60(4): "DATA"
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* 0x64(N): ADPCM data
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*/
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/* (info from https://github.com/Synthesis/ray2get)
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* 0x00(2): format tag (0x2000 for Ubisoft ADPCM)
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* 0x02(2): channels
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* 0x04(4): sample rate
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* 0x08(4): byte rate? PCM samples?
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* 0x0C(2): block align
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* 0x0E(2): bits per sample
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* 0x10(4): header size
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* 0x14(4): "vs12"
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* 0x18(4): file size
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* 0x1C(4): nibble size
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* 0x20(4): -1?
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* 0x24(4): 0?
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* 0x28(4): high/low nibble flag (when loaded in memory)
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* 0x2C(N): ADPCM info per channel, last to first
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* - 0x00(4): ADPCM hist
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* - 0x04(4): ADPCM step index
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* - 0x08(4): copy of ADPCM data (after interleave, ex. R from data + 0x01)
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* 0x60(4): "DATA"
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* 0x64(N): ADPCM data
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*/
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channels = read_u16le(0x02, sf);
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sample_rate = read_u32le(0x04, sf);
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file_size = read_u32le(0x18, sf);
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nibble_size = read_u32le(0x1c, sf);
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channels = read_u16le(0x02, sf);
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sample_rate = read_u32le(0x04, sf);
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file_size = read_u32le(0x18, sf);
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nibble_size = read_u32le(0x1c, sf);
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start_offset = 0x64;
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start_offset = 0x64;
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if (file_size != get_streamfile_size(sf))
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goto fail;
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if (file_size != get_streamfile_size(sf))
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goto fail;
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if (nibble_size > (file_size - start_offset))
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goto fail;
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if (nibble_size > (file_size - start_offset))
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goto fail;
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if (!is_id32be(0x60, sf, "DATA"))
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goto fail;
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if (!is_id32be(0x60, sf, "DATA"))
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goto fail;
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loop_flag = 0;
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loop_flag = 0;
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channels, loop_flag);
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if (!vgmstream) goto fail;
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channels, loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->meta_type = meta_UBI_APM;
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vgmstream->coding_type = coding_DVI_IMA_int;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x01;
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vgmstream->sample_rate = sample_rate;
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vgmstream->num_samples = ima_bytes_to_samples(file_size - start_offset, channels);
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vgmstream->meta_type = meta_UBI_APM;
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vgmstream->coding_type = coding_DVI_IMA_int;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x01;
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vgmstream->sample_rate = sample_rate;
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vgmstream->num_samples = ima_bytes_to_samples(file_size - start_offset, channels);
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/* read initial hist (last to first) */
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for (i = 0; i < channels; i++) {
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vgmstream->ch[i].adpcm_history1_32 = read_s32le(0x2c + 0x0c * (channels - 1 - i) + 0x00, sf);
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vgmstream->ch[i].adpcm_step_index = read_s32le(0x2c + 0x0c * (channels - 1 - i) + 0x04, sf);
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}
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//todo supposedly APM IMA removes lower 3b after assigning step, but wave looks a bit off (Rayman 2 only?):
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// ...; step = adpcm_table[step_index]; delta = (step >> 3); step &= (~7); ...
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/* read initial hist (last to first) */
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for (i = 0; i < channels; i++) {
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vgmstream->ch[i].adpcm_history1_32 = read_s32le(0x2c + 0x0c * (channels - 1 - i) + 0x00, sf);
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vgmstream->ch[i].adpcm_step_index = read_s32le(0x2c + 0x0c * (channels - 1 - i) + 0x04, sf);
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}
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//todo supposedly APM IMA removes lower 3b after assigning step, but wave looks a bit off (Rayman 2 only?):
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// ...; step = adpcm_table[step_index]; delta = (step >> 3); step &= (~7); ...
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if (!vgmstream_open_stream(vgmstream, sf, start_offset))
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goto fail;
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if (!vgmstream_open_stream(vgmstream, sf, start_offset))
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goto fail;
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return vgmstream;
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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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close_vgmstream(vgmstream);
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return NULL;
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}
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