135 lines
4.9 KiB
C
135 lines
4.9 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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#include "../util/chunks.h"
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/* VXN - from Gameloft mobile games */
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VGMSTREAM* init_vgmstream_vxn(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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int loop_flag = 0, channels, codec, sample_rate, block_align, bits, num_samples, encoder_delay;
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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 = sf->stream_index;
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/* checks */
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if (!is_id32be(0x00,sf, "VoxN"))
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goto fail;
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if (!check_extensions(sf,"vxn"))
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goto fail;
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/* 0x04: chunk size */
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/* 0x08: ASCII version? ("0.0.1") */
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if (read_u32le(0x10,sf) != get_streamfile_size(sf))
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goto fail;
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/* 0x14: first MPC data start */
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/* header is RIFF-like with many custom chunks */
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if (!find_chunk_le(sf, 0x41666D74,first_offset,0, &chunk_offset,NULL)) /* "Afmt" */
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goto fail;
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codec = read_u16le(chunk_offset+0x00, sf);
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channels = read_u16le(chunk_offset+0x02, sf);
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sample_rate = read_u32le(chunk_offset+0x04, sf);
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block_align = read_u16le(chunk_offset+0x08, sf);
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bits = read_s16le(chunk_offset+0x0a, sf);
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/* files are divided into segment subsongs, often a leadout and loop in that order,
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* but may also have +15 [Asphalt 9]. Various chunks seem to define how they are used:
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* - Rule: optional, not related to number of playlists
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* - Plst: sets N playlists + some flags?
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* - Stat: N entries (1 per playlist), start? + name (null-terminated, size 0x0C) + sample values?
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* - Trsn: optional, transitions for playlists?
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* - Grps: N entries (1 per playlist), 0x18 per entry, unknown
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* - Gprs: playlist segments, 0x20 per entry, playlist id + segment + null + segment? + flags (0/1/-1)
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*/
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if (!find_chunk_le(sf, 0x5365676D,first_offset,0, &chunk_offset,NULL)) /* "Segm" */
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goto fail;
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total_subsongs = read_u32le(chunk_offset+0x00, sf);
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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_u32le(chunk_offset+0x04 + (target_subsong-1)*0x18 + 0x00, sf);
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stream_size = read_u32le(chunk_offset+0x04 + (target_subsong-1)*0x18 + 0x04, sf);
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num_samples = read_u32le(chunk_offset+0x04 + (target_subsong-1)*0x18 + 0x08, sf);
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if (!find_chunk_le(sf, 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(channels, 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(sf, 0x4D736165,first_offset,0, &chunk_offset,NULL)) { /* "Msae" */
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if (!msadpcm_check_coefs(sf, 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 != 4 && bits != 16) goto fail; /* 16=common, 4=Asphalt Injection (Vita) */
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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, Asphalt 9) */
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if (bits != -1) goto fail;
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vgmstream->codec_data = init_ffmpeg_offset(sf, 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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encoder_delay = 0;
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mpc_get_samples(sf, start_offset, NULL, &encoder_delay);
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/* num_samples matches MPC samples */
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/* FFmpeg doesn't set encoder delay */
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ffmpeg_set_skip_samples(vgmstream->codec_data, encoder_delay);
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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, sf, 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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