mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-24 04:14:50 +01:00
114 lines
4.3 KiB
C
114 lines
4.3 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* VXN - from Gameloft mobile games */
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VGMSTREAM * init_vgmstream_vxn(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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int loop_flag = 0, channel_count, codec, sample_rate, block_align, bits, num_samples;
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off_t start_offset, stream_offset, chunk_offset, first_offset = 0x00;
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size_t stream_size;
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int total_subsongs, target_subsong = streamFile->stream_index;
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/* checks */
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if (!check_extensions(streamFile,"vxn"))
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x566F784E) /* "VoxN" */
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goto fail;
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if (read_32bitLE(0x10,streamFile) != get_streamfile_size(streamFile) )
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goto fail;
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/* header is RIFF-like with many custom chunks */
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if (!find_chunk_le(streamFile, 0x41666D74,first_offset,0, &chunk_offset,NULL)) /* "Afmt" */
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goto fail;
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codec = (uint16_t)read_16bitLE(chunk_offset+0x00, streamFile);
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channel_count = (uint16_t)read_16bitLE(chunk_offset+0x02, streamFile);
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sample_rate = read_32bitLE(chunk_offset+0x04, streamFile);
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block_align = (uint16_t)read_16bitLE(chunk_offset+0x08, streamFile);
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bits = read_16bitLE(chunk_offset+0x0a, streamFile);
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/* files are divided into segment subsongs, often a leadout and loop in that order
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* (the "Plst" and "Rule" chunks may have order info) */
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if (!find_chunk_le(streamFile, 0x5365676D,first_offset,0, &chunk_offset,NULL)) /* "Segm" */
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goto fail;
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total_subsongs = read_32bitLE(chunk_offset+0x00, streamFile);
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if (target_subsong == 0) target_subsong = 1;
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if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
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stream_offset = read_32bitLE(chunk_offset+0x04 + (target_subsong-1)*0x18 + 0x00, streamFile);
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stream_size = read_32bitLE(chunk_offset+0x04 + (target_subsong-1)*0x18 + 0x04, streamFile);
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num_samples = read_32bitLE(chunk_offset+0x04 + (target_subsong-1)*0x18 + 0x08, streamFile);
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if (!find_chunk_le(streamFile, 0x44617461,first_offset,0, &chunk_offset,NULL)) /* "Data" */
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goto fail;
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start_offset = chunk_offset + stream_offset;
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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 = sample_rate;
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vgmstream->num_samples = num_samples;
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vgmstream->num_streams = total_subsongs;
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vgmstream->stream_size = stream_size;
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vgmstream->meta_type = meta_VXN;
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switch (codec) {
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case 0x0001: /* PCM */
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if (bits != 16) goto fail;
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vgmstream->coding_type = coding_PCM16LE;
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vgmstream->interleave_block_size = block_align;
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vgmstream->layout_type = layout_interleave;
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break;
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case 0x0002: /* MSADPCM (ex. Asphalt 7) */
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if (bits != 4) goto fail;
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vgmstream->coding_type = coding_MSADPCM;
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vgmstream->frame_size = block_align;
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vgmstream->layout_type = layout_none;
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if (find_chunk_le(streamFile, 0x4D736165,first_offset,0, &chunk_offset,NULL)) { /* "Msae" */
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if (!msadpcm_check_coefs(streamFile, chunk_offset + 0x02))
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goto fail;
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}
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break;
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case 0x0011: /* MS-IMA (ex. Asphalt 6) */
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if (bits != 16) goto fail;
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vgmstream->coding_type = coding_MS_IMA;
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vgmstream->interleave_block_size = block_align;
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vgmstream->layout_type = layout_none;
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break;
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#ifdef VGM_USE_FFMPEG
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case 0x0800: /* Musepack (ex. Asphalt Xtreme) */
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if (bits != -1) goto fail;
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vgmstream->codec_data = init_ffmpeg_offset(streamFile, start_offset,stream_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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/* unlike standard .mpc, .vxn has no seek table so no need to fix */
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//ffmpeg_set_force_seek(vgmstream->codec_data);
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break;
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#endif
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default:
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VGM_LOG("VXN: unknown codec 0x%02x\n", codec);
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goto fail;
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}
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if ( !vgmstream_open_stream(vgmstream, streamFile, start_offset) )
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goto fail;
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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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