/* PipeWire */ /* SPDX-FileCopyrightText: Copyright © 2021 Wim Taymans */ /* SPDX-License-Identifier: MIT */ #include #include #include #include #include #include #include #include "dsffile.h" struct dsf_file { uint8_t *buffer; size_t offset; int mode; bool close; FILE *file; struct dsf_file_info info; }; static inline uint32_t parse_le32(const uint8_t *in) { return in[0] | (in[1] << 8) | (in[2] << 16) | (in[3] << 24); } static inline uint64_t parse_le64(const uint8_t *in) { uint64_t res = in[0]; res |= ((uint64_t)in[1]) << 8; res |= ((uint64_t)in[2]) << 16; res |= ((uint64_t)in[3]) << 24; res |= ((uint64_t)in[4]) << 32; res |= ((uint64_t)in[5]) << 40; res |= ((uint64_t)in[6]) << 48; res |= ((uint64_t)in[7]) << 56; return res; } static inline int f_skip(struct dsf_file *f, size_t bytes) { uint8_t data[256]; while (bytes > 0) { size_t s = fread(data, 1, SPA_MIN(bytes, sizeof(data)), f->file); bytes -= s; } return 0; } static int read_DSD(struct dsf_file *f) { size_t s; uint64_t size; uint8_t data[28]; s = fread(data, 1, 28, f->file); if (s < 28 || memcmp(data, "DSD ", 4) != 0) return -EINVAL; size = parse_le64(data + 4); /* size of this chunk */ parse_le64(data + 12); /* total size */ parse_le64(data + 20); /* metadata */ if (size > s) f_skip(f, size - s); return 0; } static int read_fmt(struct dsf_file *f) { size_t s; uint64_t size; uint8_t data[52]; s = fread(data, 1, 52, f->file); if (s < 52 || memcmp(data, "fmt ", 4) != 0) return -EINVAL; size = parse_le64(data + 4); /* size of this chunk */ if (parse_le32(data + 12) != 1) /* version */ return -EINVAL; if (parse_le32(data + 16) != 0) /* format id */ return -EINVAL; f->info.channel_type = parse_le32(data + 20); f->info.channels = parse_le32(data + 24); f->info.rate = parse_le32(data + 28); f->info.lsb = parse_le32(data + 32) == 1; f->info.samples = parse_le64(data + 36); f->info.blocksize = parse_le32(data + 44); if (size > s) f_skip(f, size - s); f->buffer = calloc(1, f->info.blocksize * f->info.channels); if (f->buffer == NULL) return -errno; return 0; } static int read_data(struct dsf_file *f) { size_t s; uint64_t size; uint8_t data[12]; s = fread(data, 1, 12, f->file); if (s < 12 || memcmp(data, "data", 4) != 0) return -EINVAL; size = parse_le64(data + 4); /* size of this chunk */ f->info.length = size - 12; return 0; } static int open_read(struct dsf_file *f, const char *filename, struct dsf_file_info *info) { int res; if (strcmp(filename, "-") != 0) { if ((f->file = fopen(filename, "r")) == NULL) { res = -errno; goto exit; } f->close = true; } else { f->close = false; f->file = stdin; } if ((res = read_DSD(f)) < 0) goto exit_close; if ((res = read_fmt(f)) < 0) goto exit_close; if ((res = read_data(f)) < 0) goto exit_close; f->mode = 1; *info = f->info; return 0; exit_close: if (f->close) fclose(f->file); exit: return res; } struct dsf_file * dsf_file_open(const char *filename, const char *mode, struct dsf_file_info *info) { int res; struct dsf_file *f; f = calloc(1, sizeof(struct dsf_file)); if (f == NULL) return NULL; if (spa_streq(mode, "r")) { if ((res = open_read(f, filename, info)) < 0) goto exit_free; } else { res = -EINVAL; goto exit_free; } return f; exit_free: free(f); errno = -res; return NULL; } static const uint8_t bitrev[256] = { 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff, }; ssize_t dsf_file_read(struct dsf_file *f, void *data, size_t samples, const struct dsf_layout *layout) { uint8_t *d = data; int step = SPA_ABS(layout->interleave); bool rev = layout->lsb != f->info.lsb; size_t total, block, offset, pos, scale; size_t blocksize = f->info.blocksize * f->info.channels; block = f->offset / f->info.blocksize; offset = block * blocksize; pos = f->offset % f->info.blocksize; scale = SPA_CLAMP(f->info.rate / (44100u * 64u), 1u, 4u); samples *= step; samples *= scale; for (total = 0; total < samples; total++) { uint32_t i; if (pos == 0) { if (fread(f->buffer, 1, blocksize, f->file) != blocksize) break; } if (f->info.length > 0 && offset + pos >= f->info.length) { break; } for (i = 0; i < layout->channels; i++) { const uint8_t *c = &f->buffer[f->info.blocksize * i + pos]; int j; if (layout->interleave > 0) { for (j = 0; j < step; j++) *d++ = rev ? bitrev[c[j]] : c[j]; } else { for (j = step-1; j >= 0; j--) *d++ = rev ? bitrev[c[j]] : c[j]; } } pos += step; if (pos == f->info.blocksize) { pos = 0; offset += blocksize; } } f->offset += total * step; return total; } int dsf_file_close(struct dsf_file *f) { if (f->close) fclose(f->file); free(f->buffer); free(f); return 0; }