1397 lines
48 KiB
C++
1397 lines
48 KiB
C++
#ifndef MINIMP3_EXT_H
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#define MINIMP3_EXT_H
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/*
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https://github.com/lieff/minimp3
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To the extent possible under law, the author(s) have dedicated all copyright and related and neighboring rights to this software to the public domain worldwide.
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This software is distributed without any warranty.
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See <http://creativecommons.org/publicdomain/zero/1.0/>.
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*/
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#include <stddef.h>
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#include "minimp3.h"
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/* flags for mp3dec_ex_open_* functions */
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#define MP3D_SEEK_TO_BYTE 0 /* mp3dec_ex_seek seeks to byte in stream */
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#define MP3D_SEEK_TO_SAMPLE 1 /* mp3dec_ex_seek precisely seeks to sample using index (created during duration calculation scan or when mp3dec_ex_seek called) */
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#define MP3D_DO_NOT_SCAN 2 /* do not scan whole stream for duration if vbrtag not found, mp3dec_ex_t::samples will be filled only if mp3dec_ex_t::vbr_tag_found == 1 */
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#ifdef MINIMP3_ALLOW_MONO_STEREO_TRANSITION
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#define MP3D_ALLOW_MONO_STEREO_TRANSITION 4
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#define MP3D_FLAGS_MASK 7
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#else
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#define MP3D_FLAGS_MASK 3
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#endif
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/* compile-time config */
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#define MINIMP3_PREDECODE_FRAMES 2 /* frames to pre-decode and skip after seek (to fill internal structures) */
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/*#define MINIMP3_SEEK_IDX_LINEAR_SEARCH*/ /* define to use linear index search instead of binary search on seek */
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#define MINIMP3_IO_SIZE (128*1024) /* io buffer size for streaming functions, must be greater than MINIMP3_BUF_SIZE */
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#define MINIMP3_BUF_SIZE (16*1024) /* buffer which can hold minimum 10 consecutive mp3 frames (~16KB) worst case */
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/*#define MINIMP3_SCAN_LIMIT (256*1024)*/ /* how many bytes will be scanned to search first valid mp3 frame, to prevent stall on large non-mp3 files */
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#define MINIMP3_ENABLE_RING 0 /* WIP enable hardware magic ring buffer if available, to make less input buffer memmove(s) in callback IO mode */
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/* return error codes */
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#define MP3D_E_PARAM -1
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#define MP3D_E_MEMORY -2
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#define MP3D_E_IOERROR -3
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#define MP3D_E_USER -4 /* can be used to stop processing from callbacks without indicating specific error */
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#define MP3D_E_DECODE -5 /* decode error which can't be safely skipped, such as sample rate, layer and channels change */
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typedef struct
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{
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mp3d_sample_t *buffer;
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size_t samples; /* channels included, byte size = samples*sizeof(mp3d_sample_t) */
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int channels, hz, layer, avg_bitrate_kbps;
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} mp3dec_file_info_t;
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typedef struct
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{
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const uint8_t *buffer;
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size_t size;
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} mp3dec_map_info_t;
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typedef struct
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{
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uint64_t sample;
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uint64_t offset;
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} mp3dec_frame_t;
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typedef struct
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{
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mp3dec_frame_t *frames;
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size_t num_frames, capacity;
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} mp3dec_index_t;
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typedef size_t (*MP3D_READ_CB)(void *buf, size_t size, void *user_data);
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typedef int (*MP3D_SEEK_CB)(uint64_t position, void *user_data);
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typedef struct
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{
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MP3D_READ_CB read;
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void *read_data;
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MP3D_SEEK_CB seek;
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void *seek_data;
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} mp3dec_io_t;
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typedef struct
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{
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mp3dec_t mp3d;
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mp3dec_map_info_t file;
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mp3dec_io_t *io;
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mp3dec_index_t index;
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uint64_t offset, samples, detected_samples, cur_sample, start_offset, end_offset;
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mp3dec_frame_info_t info;
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mp3d_sample_t buffer[MINIMP3_MAX_SAMPLES_PER_FRAME];
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size_t input_consumed, input_filled;
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int is_file, flags, vbr_tag_found, indexes_built;
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int free_format_bytes;
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int buffer_samples, buffer_consumed, to_skip, start_delay;
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int last_error;
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} mp3dec_ex_t;
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typedef int (*MP3D_ITERATE_CB)(void *user_data, const uint8_t *frame, int frame_size, int free_format_bytes, size_t buf_size, uint64_t offset, mp3dec_frame_info_t *info);
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typedef int (*MP3D_PROGRESS_CB)(void *user_data, size_t file_size, uint64_t offset, mp3dec_frame_info_t *info);
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* detect mp3/mpa format */
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int mp3dec_detect_buf(const uint8_t *buf, size_t buf_size);
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int mp3dec_detect_cb(mp3dec_io_t *io, uint8_t *buf, size_t buf_size);
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/* decode whole buffer block */
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int mp3dec_load_buf(mp3dec_t *dec, const uint8_t *buf, size_t buf_size, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data);
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int mp3dec_load_cb(mp3dec_t *dec, mp3dec_io_t *io, uint8_t *buf, size_t buf_size, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data);
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/* iterate through frames */
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int mp3dec_iterate_buf(const uint8_t *buf, size_t buf_size, MP3D_ITERATE_CB callback, void *user_data);
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int mp3dec_iterate_cb(mp3dec_io_t *io, uint8_t *buf, size_t buf_size, MP3D_ITERATE_CB callback, void *user_data);
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/* streaming decoder with seeking capability */
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int mp3dec_ex_open_buf(mp3dec_ex_t *dec, const uint8_t *buf, size_t buf_size, int flags);
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int mp3dec_ex_open_cb(mp3dec_ex_t *dec, mp3dec_io_t *io, int flags);
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void mp3dec_ex_close(mp3dec_ex_t *dec);
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int mp3dec_ex_seek(mp3dec_ex_t *dec, uint64_t position);
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size_t mp3dec_ex_read_frame(mp3dec_ex_t *dec, mp3d_sample_t **buf, mp3dec_frame_info_t *frame_info, size_t max_samples);
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size_t mp3dec_ex_read(mp3dec_ex_t *dec, mp3d_sample_t *buf, size_t samples);
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#ifndef MINIMP3_NO_STDIO
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/* stdio versions of file detect, load, iterate and stream */
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int mp3dec_detect(const char *file_name);
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int mp3dec_load(mp3dec_t *dec, const char *file_name, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data);
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int mp3dec_iterate(const char *file_name, MP3D_ITERATE_CB callback, void *user_data);
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int mp3dec_ex_open(mp3dec_ex_t *dec, const char *file_name, int flags);
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#ifdef _WIN32
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int mp3dec_detect_w(const wchar_t *file_name);
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int mp3dec_load_w(mp3dec_t *dec, const wchar_t *file_name, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data);
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int mp3dec_iterate_w(const wchar_t *file_name, MP3D_ITERATE_CB callback, void *user_data);
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int mp3dec_ex_open_w(mp3dec_ex_t *dec, const wchar_t *file_name, int flags);
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#endif
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /*MINIMP3_EXT_H*/
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#if defined(MINIMP3_IMPLEMENTATION) && !defined(_MINIMP3_EX_IMPLEMENTATION_GUARD)
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#define _MINIMP3_EX_IMPLEMENTATION_GUARD
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#include <limits.h>
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#include "minimp3.h"
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static void mp3dec_skip_id3v1(const uint8_t *buf, size_t *pbuf_size)
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{
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size_t buf_size = *pbuf_size;
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#ifndef MINIMP3_NOSKIP_ID3V1
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if (buf_size >= 128 && !memcmp(buf + buf_size - 128, "TAG", 3))
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{
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buf_size -= 128;
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if (buf_size >= 227 && !memcmp(buf + buf_size - 227, "TAG+", 4))
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buf_size -= 227;
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}
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#endif
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#ifndef MINIMP3_NOSKIP_APEV2
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if (buf_size > 32 && !memcmp(buf + buf_size - 32, "APETAGEX", 8))
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{
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buf_size -= 32;
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const uint8_t *tag = buf + buf_size + 8 + 4;
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uint32_t tag_size = (uint32_t)(tag[3] << 24) | (tag[2] << 16) | (tag[1] << 8) | tag[0];
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if (buf_size >= tag_size)
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buf_size -= tag_size;
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}
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#endif
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*pbuf_size = buf_size;
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}
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static size_t mp3dec_skip_id3v2(const uint8_t *buf, size_t buf_size)
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{
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#define MINIMP3_ID3_DETECT_SIZE 10
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#ifndef MINIMP3_NOSKIP_ID3V2
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if (buf_size >= MINIMP3_ID3_DETECT_SIZE && !memcmp(buf, "ID3", 3) && !((buf[5] & 15) || (buf[6] & 0x80) || (buf[7] & 0x80) || (buf[8] & 0x80) || (buf[9] & 0x80)))
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{
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size_t id3v2size = (((buf[6] & 0x7f) << 21) | ((buf[7] & 0x7f) << 14) | ((buf[8] & 0x7f) << 7) | (buf[9] & 0x7f)) + 10;
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if ((buf[5] & 16))
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id3v2size += 10; /* footer */
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return id3v2size;
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}
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#endif
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return 0;
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}
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static void mp3dec_skip_id3(const uint8_t **pbuf, size_t *pbuf_size)
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{
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uint8_t *buf = (uint8_t *)(*pbuf);
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size_t buf_size = *pbuf_size;
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size_t id3v2size = mp3dec_skip_id3v2(buf, buf_size);
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if (id3v2size)
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{
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if (id3v2size >= buf_size)
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id3v2size = buf_size;
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buf += id3v2size;
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buf_size -= id3v2size;
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}
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mp3dec_skip_id3v1(buf, &buf_size);
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*pbuf = (const uint8_t *)buf;
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*pbuf_size = buf_size;
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}
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static int mp3dec_check_vbrtag(const uint8_t *frame, int frame_size, uint32_t *frames, int *delay, int *padding)
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{
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static const char g_xing_tag[4] = { 'X', 'i', 'n', 'g' };
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static const char g_info_tag[4] = { 'I', 'n', 'f', 'o' };
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#define FRAMES_FLAG 1
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#define BYTES_FLAG 2
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#define TOC_FLAG 4
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#define VBR_SCALE_FLAG 8
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/* Side info offsets after header:
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/ Mono Stereo
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/ MPEG1 17 32
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/ MPEG2 & 2.5 9 17*/
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bs_t bs[1];
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L3_gr_info_t gr_info[4];
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bs_init(bs, frame + HDR_SIZE, frame_size - HDR_SIZE);
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if (HDR_IS_CRC(frame))
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get_bits(bs, 16);
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if (L3_read_side_info(bs, gr_info, frame) < 0)
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return 0; /* side info corrupted */
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const uint8_t *tag = frame + HDR_SIZE + bs->pos/8;
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if (memcmp(g_xing_tag, tag, 4) && memcmp(g_info_tag, tag, 4))
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return 0;
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int flags = tag[7];
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if (!((flags & FRAMES_FLAG)))
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return -1;
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tag += 8;
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*frames = (uint32_t)(tag[0] << 24) | (tag[1] << 16) | (tag[2] << 8) | tag[3];
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tag += 4;
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if (flags & BYTES_FLAG)
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tag += 4;
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if (flags & TOC_FLAG)
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tag += 100;
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if (flags & VBR_SCALE_FLAG)
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tag += 4;
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*delay = *padding = 0;
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if (*tag)
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{ /* extension, LAME, Lavc, etc. Should be the same structure. */
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tag += 21;
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if (tag - frame + 14 >= frame_size)
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return 0;
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*delay = ((tag[0] << 4) | (tag[1] >> 4)) + (528 + 1);
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*padding = (((tag[1] & 0xF) << 8) | tag[2]) - (528 + 1);
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}
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return 1;
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}
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int mp3dec_detect_buf(const uint8_t *buf, size_t buf_size)
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{
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return mp3dec_detect_cb(0, (uint8_t *)buf, buf_size);
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}
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int mp3dec_detect_cb(mp3dec_io_t *io, uint8_t *buf, size_t buf_size)
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{
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if (!buf || (size_t)-1 == buf_size || (io && buf_size < MINIMP3_BUF_SIZE))
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return MP3D_E_PARAM;
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size_t filled = buf_size;
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if (io)
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{
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if (io->seek(0, io->seek_data))
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return MP3D_E_IOERROR;
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filled = io->read(buf, MINIMP3_ID3_DETECT_SIZE, io->read_data);
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if (filled > MINIMP3_ID3_DETECT_SIZE)
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return MP3D_E_IOERROR;
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}
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if (filled < MINIMP3_ID3_DETECT_SIZE)
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return MP3D_E_USER; /* too small, can't be mp3/mpa */
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if (mp3dec_skip_id3v2(buf, filled))
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return 0; /* id3v2 tag is enough evidence */
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if (io)
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{
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size_t readed = io->read(buf + MINIMP3_ID3_DETECT_SIZE, buf_size - MINIMP3_ID3_DETECT_SIZE, io->read_data);
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if (readed > (buf_size - MINIMP3_ID3_DETECT_SIZE))
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return MP3D_E_IOERROR;
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filled += readed;
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if (filled < MINIMP3_BUF_SIZE)
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mp3dec_skip_id3v1(buf, &filled);
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} else
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{
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mp3dec_skip_id3v1(buf, &filled);
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if (filled > MINIMP3_BUF_SIZE)
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filled = MINIMP3_BUF_SIZE;
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}
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int free_format_bytes, frame_size;
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mp3d_find_frame(buf, filled, &free_format_bytes, &frame_size);
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if (frame_size)
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return 0; /* MAX_FRAME_SYNC_MATCHES consecutive frames found */
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return MP3D_E_USER;
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}
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int mp3dec_load_buf(mp3dec_t *dec, const uint8_t *buf, size_t buf_size, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data)
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{
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return mp3dec_load_cb(dec, 0, (uint8_t *)buf, buf_size, info, progress_cb, user_data);
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}
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int mp3dec_load_cb(mp3dec_t *dec, mp3dec_io_t *io, uint8_t *buf, size_t buf_size, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data)
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{
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if (!dec || !buf || !info || (size_t)-1 == buf_size || (io && buf_size < MINIMP3_BUF_SIZE))
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return MP3D_E_PARAM;
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uint64_t detected_samples = 0;
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size_t orig_buf_size = buf_size;
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int to_skip = 0;
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mp3dec_frame_info_t frame_info;
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memset(info, 0, sizeof(*info));
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memset(&frame_info, 0, sizeof(frame_info));
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/* skip id3 */
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size_t filled = 0, consumed = 0;
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int eof = 0, ret = 0;
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if (io)
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{
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if (io->seek(0, io->seek_data))
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return MP3D_E_IOERROR;
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filled = io->read(buf, MINIMP3_ID3_DETECT_SIZE, io->read_data);
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if (filled > MINIMP3_ID3_DETECT_SIZE)
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return MP3D_E_IOERROR;
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if (MINIMP3_ID3_DETECT_SIZE != filled)
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return 0;
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size_t id3v2size = mp3dec_skip_id3v2(buf, filled);
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if (id3v2size)
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{
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if (io->seek(id3v2size, io->seek_data))
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return MP3D_E_IOERROR;
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filled = io->read(buf, buf_size, io->read_data);
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if (filled > buf_size)
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return MP3D_E_IOERROR;
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} else
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{
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size_t readed = io->read(buf + MINIMP3_ID3_DETECT_SIZE, buf_size - MINIMP3_ID3_DETECT_SIZE, io->read_data);
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if (readed > (buf_size - MINIMP3_ID3_DETECT_SIZE))
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return MP3D_E_IOERROR;
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filled += readed;
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}
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if (filled < MINIMP3_BUF_SIZE)
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mp3dec_skip_id3v1(buf, &filled);
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} else
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{
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mp3dec_skip_id3((const uint8_t **)&buf, &buf_size);
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if (!buf_size)
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return 0;
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}
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/* try to make allocation size assumption by first frame or vbr tag */
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mp3dec_init(dec);
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int samples;
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do
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{
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uint32_t frames;
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int i, delay, padding, free_format_bytes = 0, frame_size = 0;
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const uint8_t *hdr;
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if (io)
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{
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if (!eof && filled - consumed < MINIMP3_BUF_SIZE)
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{ /* keep minimum 10 consecutive mp3 frames (~16KB) worst case */
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memmove(buf, buf + consumed, filled - consumed);
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filled -= consumed;
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consumed = 0;
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size_t readed = io->read(buf + filled, buf_size - filled, io->read_data);
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if (readed > (buf_size - filled))
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return MP3D_E_IOERROR;
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if (readed != (buf_size - filled))
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eof = 1;
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filled += readed;
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if (eof)
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mp3dec_skip_id3v1(buf, &filled);
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}
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i = mp3d_find_frame(buf + consumed, filled - consumed, &free_format_bytes, &frame_size);
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consumed += i;
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hdr = buf + consumed;
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} else
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{
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i = mp3d_find_frame(buf, buf_size, &free_format_bytes, &frame_size);
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buf += i;
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buf_size -= i;
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hdr = buf;
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}
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if (i && !frame_size)
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continue;
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if (!frame_size)
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return 0;
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frame_info.channels = HDR_IS_MONO(hdr) ? 1 : 2;
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frame_info.hz = hdr_sample_rate_hz(hdr);
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frame_info.layer = 4 - HDR_GET_LAYER(hdr);
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frame_info.bitrate_kbps = hdr_bitrate_kbps(hdr);
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frame_info.frame_bytes = frame_size;
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samples = hdr_frame_samples(hdr)*frame_info.channels;
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if (3 != frame_info.layer)
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break;
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int ret = mp3dec_check_vbrtag(hdr, frame_size, &frames, &delay, &padding);
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if (ret > 0)
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{
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padding *= frame_info.channels;
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to_skip = delay*frame_info.channels;
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detected_samples = samples*(uint64_t)frames;
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if (detected_samples >= (uint64_t)to_skip)
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detected_samples -= to_skip;
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if (padding > 0 && detected_samples >= (uint64_t)padding)
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detected_samples -= padding;
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if (!detected_samples)
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return 0;
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}
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if (ret)
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{
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if (io)
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{
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consumed += frame_size;
|
|
} else
|
|
{
|
|
buf += frame_size;
|
|
buf_size -= frame_size;
|
|
}
|
|
}
|
|
break;
|
|
} while(1);
|
|
size_t allocated = MINIMP3_MAX_SAMPLES_PER_FRAME*sizeof(mp3d_sample_t);
|
|
if (detected_samples)
|
|
allocated += detected_samples*sizeof(mp3d_sample_t);
|
|
else
|
|
allocated += (buf_size/frame_info.frame_bytes)*samples*sizeof(mp3d_sample_t);
|
|
info->buffer = (mp3d_sample_t*)malloc(allocated);
|
|
if (!info->buffer)
|
|
return MP3D_E_MEMORY;
|
|
/* save info */
|
|
info->channels = frame_info.channels;
|
|
info->hz = frame_info.hz;
|
|
info->layer = frame_info.layer;
|
|
/* decode all frames */
|
|
size_t avg_bitrate_kbps = 0, frames = 0;
|
|
do
|
|
{
|
|
if ((allocated - info->samples*sizeof(mp3d_sample_t)) < MINIMP3_MAX_SAMPLES_PER_FRAME*sizeof(mp3d_sample_t))
|
|
{
|
|
allocated *= 2;
|
|
mp3d_sample_t *alloc_buf = (mp3d_sample_t*)realloc(info->buffer, allocated);
|
|
if (!alloc_buf)
|
|
return MP3D_E_MEMORY;
|
|
info->buffer = alloc_buf;
|
|
}
|
|
if (io)
|
|
{
|
|
if (!eof && filled - consumed < MINIMP3_BUF_SIZE)
|
|
{ /* keep minimum 10 consecutive mp3 frames (~16KB) worst case */
|
|
memmove(buf, buf + consumed, filled - consumed);
|
|
filled -= consumed;
|
|
consumed = 0;
|
|
size_t readed = io->read(buf + filled, buf_size - filled, io->read_data);
|
|
if (readed != (buf_size - filled))
|
|
eof = 1;
|
|
filled += readed;
|
|
if (eof)
|
|
mp3dec_skip_id3v1(buf, &filled);
|
|
}
|
|
samples = mp3dec_decode_frame(dec, buf + consumed, filled - consumed, info->buffer + info->samples, &frame_info);
|
|
consumed += frame_info.frame_bytes;
|
|
} else
|
|
{
|
|
samples = mp3dec_decode_frame(dec, buf, MINIMP3_MIN(buf_size, (size_t)INT_MAX), info->buffer + info->samples, &frame_info);
|
|
buf += frame_info.frame_bytes;
|
|
buf_size -= frame_info.frame_bytes;
|
|
}
|
|
if (samples)
|
|
{
|
|
if (info->hz != frame_info.hz || info->layer != frame_info.layer)
|
|
{
|
|
ret = MP3D_E_DECODE;
|
|
break;
|
|
}
|
|
if (info->channels && info->channels != frame_info.channels)
|
|
{
|
|
#ifdef MINIMP3_ALLOW_MONO_STEREO_TRANSITION
|
|
info->channels = 0; /* mark file with mono-stereo transition */
|
|
#else
|
|
ret = MP3D_E_DECODE;
|
|
break;
|
|
#endif
|
|
}
|
|
samples *= frame_info.channels;
|
|
if (to_skip)
|
|
{
|
|
size_t skip = MINIMP3_MIN(samples, to_skip);
|
|
to_skip -= skip;
|
|
samples -= skip;
|
|
memmove(info->buffer, info->buffer + skip, samples*sizeof(mp3d_sample_t));
|
|
}
|
|
info->samples += samples;
|
|
avg_bitrate_kbps += frame_info.bitrate_kbps;
|
|
frames++;
|
|
if (progress_cb)
|
|
{
|
|
ret = progress_cb(user_data, orig_buf_size, orig_buf_size - buf_size, &frame_info);
|
|
if (ret)
|
|
break;
|
|
}
|
|
}
|
|
} while (frame_info.frame_bytes);
|
|
if (detected_samples && info->samples > detected_samples)
|
|
info->samples = detected_samples; /* cut padding */
|
|
/* reallocate to normal buffer size */
|
|
if (allocated != info->samples*sizeof(mp3d_sample_t))
|
|
{
|
|
mp3d_sample_t *alloc_buf = (mp3d_sample_t*)realloc(info->buffer, info->samples*sizeof(mp3d_sample_t));
|
|
if (!alloc_buf && info->samples)
|
|
return MP3D_E_MEMORY;
|
|
info->buffer = alloc_buf;
|
|
}
|
|
if (frames)
|
|
info->avg_bitrate_kbps = avg_bitrate_kbps/frames;
|
|
return ret;
|
|
}
|
|
|
|
int mp3dec_iterate_buf(const uint8_t *buf, size_t buf_size, MP3D_ITERATE_CB callback, void *user_data)
|
|
{
|
|
const uint8_t *orig_buf = buf;
|
|
if (!buf || (size_t)-1 == buf_size || !callback)
|
|
return MP3D_E_PARAM;
|
|
/* skip id3 */
|
|
mp3dec_skip_id3(&buf, &buf_size);
|
|
if (!buf_size)
|
|
return 0;
|
|
mp3dec_frame_info_t frame_info;
|
|
memset(&frame_info, 0, sizeof(frame_info));
|
|
do
|
|
{
|
|
int free_format_bytes = 0, frame_size = 0, ret;
|
|
int i = mp3d_find_frame(buf, buf_size, &free_format_bytes, &frame_size);
|
|
buf += i;
|
|
buf_size -= i;
|
|
if (i && !frame_size)
|
|
continue;
|
|
if (!frame_size)
|
|
break;
|
|
const uint8_t *hdr = buf;
|
|
frame_info.channels = HDR_IS_MONO(hdr) ? 1 : 2;
|
|
frame_info.hz = hdr_sample_rate_hz(hdr);
|
|
frame_info.layer = 4 - HDR_GET_LAYER(hdr);
|
|
frame_info.bitrate_kbps = hdr_bitrate_kbps(hdr);
|
|
frame_info.frame_bytes = frame_size;
|
|
|
|
if (callback)
|
|
{
|
|
if ((ret = callback(user_data, hdr, frame_size, free_format_bytes, buf_size, hdr - orig_buf, &frame_info)))
|
|
return ret;
|
|
}
|
|
buf += frame_size;
|
|
buf_size -= frame_size;
|
|
} while (1);
|
|
return 0;
|
|
}
|
|
|
|
int mp3dec_iterate_cb(mp3dec_io_t *io, uint8_t *buf, size_t buf_size, MP3D_ITERATE_CB callback, void *user_data)
|
|
{
|
|
if (!io || !buf || (size_t)-1 == buf_size || buf_size < MINIMP3_BUF_SIZE || !callback)
|
|
return MP3D_E_PARAM;
|
|
size_t filled = io->read(buf, MINIMP3_ID3_DETECT_SIZE, io->read_data), consumed = 0;
|
|
uint64_t readed = 0;
|
|
mp3dec_frame_info_t frame_info;
|
|
int eof = 0;
|
|
memset(&frame_info, 0, sizeof(frame_info));
|
|
if (filled > MINIMP3_ID3_DETECT_SIZE)
|
|
return MP3D_E_IOERROR;
|
|
if (MINIMP3_ID3_DETECT_SIZE != filled)
|
|
return 0;
|
|
size_t id3v2size = mp3dec_skip_id3v2(buf, filled);
|
|
if (id3v2size)
|
|
{
|
|
if (io->seek(id3v2size, io->seek_data))
|
|
return MP3D_E_IOERROR;
|
|
filled = io->read(buf, buf_size, io->read_data);
|
|
if (filled > buf_size)
|
|
return MP3D_E_IOERROR;
|
|
readed += id3v2size;
|
|
} else
|
|
{
|
|
size_t readed = io->read(buf + MINIMP3_ID3_DETECT_SIZE, buf_size - MINIMP3_ID3_DETECT_SIZE, io->read_data);
|
|
if (readed > (buf_size - MINIMP3_ID3_DETECT_SIZE))
|
|
return MP3D_E_IOERROR;
|
|
filled += readed;
|
|
}
|
|
if (filled < MINIMP3_BUF_SIZE)
|
|
mp3dec_skip_id3v1(buf, &filled);
|
|
do
|
|
{
|
|
int free_format_bytes = 0, frame_size = 0, ret;
|
|
int i = mp3d_find_frame(buf + consumed, filled - consumed, &free_format_bytes, &frame_size);
|
|
if (i && !frame_size)
|
|
{
|
|
consumed += i;
|
|
continue;
|
|
}
|
|
if (!frame_size)
|
|
break;
|
|
const uint8_t *hdr = buf + consumed + i;
|
|
frame_info.channels = HDR_IS_MONO(hdr) ? 1 : 2;
|
|
frame_info.hz = hdr_sample_rate_hz(hdr);
|
|
frame_info.layer = 4 - HDR_GET_LAYER(hdr);
|
|
frame_info.bitrate_kbps = hdr_bitrate_kbps(hdr);
|
|
frame_info.frame_bytes = frame_size;
|
|
|
|
readed += i;
|
|
if (callback)
|
|
{
|
|
if ((ret = callback(user_data, hdr, frame_size, free_format_bytes, filled - consumed, readed, &frame_info)))
|
|
return ret;
|
|
}
|
|
readed += frame_size;
|
|
consumed += i + frame_size;
|
|
if (!eof && filled - consumed < MINIMP3_BUF_SIZE)
|
|
{ /* keep minimum 10 consecutive mp3 frames (~16KB) worst case */
|
|
memmove(buf, buf + consumed, filled - consumed);
|
|
filled -= consumed;
|
|
consumed = 0;
|
|
size_t readed = io->read(buf + filled, buf_size - filled, io->read_data);
|
|
if (readed > (buf_size - filled))
|
|
return MP3D_E_IOERROR;
|
|
if (readed != (buf_size - filled))
|
|
eof = 1;
|
|
filled += readed;
|
|
if (eof)
|
|
mp3dec_skip_id3v1(buf, &filled);
|
|
}
|
|
} while (1);
|
|
return 0;
|
|
}
|
|
|
|
static int mp3dec_load_index(void *user_data, const uint8_t *frame, int frame_size, int free_format_bytes, size_t buf_size, uint64_t offset, mp3dec_frame_info_t *info)
|
|
{
|
|
mp3dec_frame_t *idx_frame;
|
|
mp3dec_ex_t *dec = (mp3dec_ex_t *)user_data;
|
|
if (!dec->index.frames && !dec->start_offset)
|
|
{ /* detect VBR tag and try to avoid full scan */
|
|
uint32_t frames;
|
|
int delay, padding;
|
|
dec->info = *info;
|
|
dec->start_offset = dec->offset = offset;
|
|
dec->end_offset = offset + buf_size;
|
|
dec->free_format_bytes = free_format_bytes; /* should not change */
|
|
if (3 == dec->info.layer)
|
|
{
|
|
int ret = mp3dec_check_vbrtag(frame, frame_size, &frames, &delay, &padding);
|
|
if (ret)
|
|
dec->start_offset = dec->offset = offset + frame_size;
|
|
if (ret > 0)
|
|
{
|
|
padding *= info->channels;
|
|
dec->start_delay = dec->to_skip = delay*info->channels;
|
|
dec->samples = hdr_frame_samples(frame)*info->channels*(uint64_t)frames;
|
|
if (dec->samples >= (uint64_t)dec->start_delay)
|
|
dec->samples -= dec->start_delay;
|
|
if (padding > 0 && dec->samples >= (uint64_t)padding)
|
|
dec->samples -= padding;
|
|
dec->detected_samples = dec->samples;
|
|
dec->vbr_tag_found = 1;
|
|
return MP3D_E_USER;
|
|
} else if (ret < 0)
|
|
return 0;
|
|
}
|
|
}
|
|
if (dec->flags & MP3D_DO_NOT_SCAN)
|
|
return MP3D_E_USER;
|
|
if (dec->index.num_frames + 1 > dec->index.capacity)
|
|
{
|
|
if (!dec->index.capacity)
|
|
dec->index.capacity = 4096;
|
|
else
|
|
dec->index.capacity *= 2;
|
|
mp3dec_frame_t *alloc_buf = (mp3dec_frame_t *)realloc((void*)dec->index.frames, sizeof(mp3dec_frame_t)*dec->index.capacity);
|
|
if (!alloc_buf)
|
|
return MP3D_E_MEMORY;
|
|
dec->index.frames = alloc_buf;
|
|
}
|
|
idx_frame = &dec->index.frames[dec->index.num_frames++];
|
|
idx_frame->offset = offset;
|
|
idx_frame->sample = dec->samples;
|
|
if (!dec->buffer_samples && dec->index.num_frames < 256)
|
|
{ /* for some cutted mp3 frames, bit-reservoir not filled and decoding can't be started from first frames */
|
|
/* try to decode up to 255 first frames till samples starts to decode */
|
|
dec->buffer_samples = mp3dec_decode_frame(&dec->mp3d, frame, MINIMP3_MIN(buf_size, (size_t)INT_MAX), dec->buffer, info);
|
|
dec->samples += dec->buffer_samples*info->channels;
|
|
} else
|
|
dec->samples += hdr_frame_samples(frame)*info->channels;
|
|
return 0;
|
|
}
|
|
|
|
int mp3dec_ex_open_buf(mp3dec_ex_t *dec, const uint8_t *buf, size_t buf_size, int flags)
|
|
{
|
|
if (!dec || !buf || (size_t)-1 == buf_size || (flags & (~MP3D_FLAGS_MASK)))
|
|
return MP3D_E_PARAM;
|
|
memset(dec, 0, sizeof(*dec));
|
|
dec->file.buffer = buf;
|
|
dec->file.size = buf_size;
|
|
dec->flags = flags;
|
|
mp3dec_init(&dec->mp3d);
|
|
int ret = mp3dec_iterate_buf(dec->file.buffer, dec->file.size, mp3dec_load_index, dec);
|
|
if (ret && MP3D_E_USER != ret)
|
|
return ret;
|
|
mp3dec_init(&dec->mp3d);
|
|
dec->buffer_samples = 0;
|
|
dec->indexes_built = !(dec->vbr_tag_found || (flags & MP3D_DO_NOT_SCAN));
|
|
dec->flags &= (~MP3D_DO_NOT_SCAN);
|
|
return 0;
|
|
}
|
|
|
|
#ifndef MINIMP3_SEEK_IDX_LINEAR_SEARCH
|
|
static size_t mp3dec_idx_binary_search(mp3dec_index_t *idx, uint64_t position)
|
|
{
|
|
size_t end = idx->num_frames, start = 0, index = 0;
|
|
while (start <= end)
|
|
{
|
|
size_t mid = (start + end) / 2;
|
|
if (idx->frames[mid].sample >= position)
|
|
{ /* move left side. */
|
|
if (idx->frames[mid].sample == position)
|
|
return mid;
|
|
end = mid - 1;
|
|
} else
|
|
{ /* move to right side */
|
|
index = mid;
|
|
start = mid + 1;
|
|
if (start == idx->num_frames)
|
|
break;
|
|
}
|
|
}
|
|
return index;
|
|
}
|
|
#endif
|
|
|
|
int mp3dec_ex_seek(mp3dec_ex_t *dec, uint64_t position)
|
|
{
|
|
size_t i;
|
|
if (!dec)
|
|
return MP3D_E_PARAM;
|
|
if (!(dec->flags & MP3D_SEEK_TO_SAMPLE))
|
|
{
|
|
if (dec->io)
|
|
{
|
|
dec->offset = position;
|
|
} else
|
|
{
|
|
dec->offset = MINIMP3_MIN(position, dec->file.size);
|
|
}
|
|
dec->cur_sample = 0;
|
|
goto do_exit;
|
|
}
|
|
dec->cur_sample = position;
|
|
position += dec->start_delay;
|
|
if (0 == position)
|
|
{ /* optimize seek to zero, no index needed */
|
|
seek_zero:
|
|
dec->offset = dec->start_offset;
|
|
dec->to_skip = 0;
|
|
goto do_exit;
|
|
}
|
|
if (!dec->indexes_built)
|
|
{ /* no index created yet (vbr tag used to calculate track length or MP3D_DO_NOT_SCAN open flag used) */
|
|
dec->indexes_built = 1;
|
|
dec->samples = 0;
|
|
dec->buffer_samples = 0;
|
|
if (dec->io)
|
|
{
|
|
if (dec->io->seek(dec->start_offset, dec->io->seek_data))
|
|
return MP3D_E_IOERROR;
|
|
int ret = mp3dec_iterate_cb(dec->io, (uint8_t *)dec->file.buffer, dec->file.size, mp3dec_load_index, dec);
|
|
if (ret && MP3D_E_USER != ret)
|
|
return ret;
|
|
} else
|
|
{
|
|
int ret = mp3dec_iterate_buf(dec->file.buffer + dec->start_offset, dec->file.size - dec->start_offset, mp3dec_load_index, dec);
|
|
if (ret && MP3D_E_USER != ret)
|
|
return ret;
|
|
}
|
|
for (i = 0; i < dec->index.num_frames; i++)
|
|
dec->index.frames[i].offset += dec->start_offset;
|
|
dec->samples = dec->detected_samples;
|
|
}
|
|
if (!dec->index.frames)
|
|
goto seek_zero; /* no frames in file - seek to zero */
|
|
#ifdef MINIMP3_SEEK_IDX_LINEAR_SEARCH
|
|
for (i = 0; i < dec->index.num_frames; i++)
|
|
{
|
|
if (dec->index.frames[i].sample >= position)
|
|
break;
|
|
}
|
|
#else
|
|
i = mp3dec_idx_binary_search(&dec->index, position);
|
|
#endif
|
|
if (i)
|
|
{
|
|
int to_fill_bytes = 511;
|
|
int skip_frames = MINIMP3_PREDECODE_FRAMES
|
|
#ifdef MINIMP3_SEEK_IDX_LINEAR_SEARCH
|
|
+ ((dec->index.frames[i].sample == position) ? 0 : 1)
|
|
#endif
|
|
;
|
|
i -= MINIMP3_MIN(i, (size_t)skip_frames);
|
|
if (3 == dec->info.layer)
|
|
{
|
|
while (i && to_fill_bytes)
|
|
{ /* make sure bit-reservoir is filled when we start decoding */
|
|
bs_t bs[1];
|
|
L3_gr_info_t gr_info[4];
|
|
int frame_bytes, frame_size;
|
|
const uint8_t *hdr;
|
|
if (dec->io)
|
|
{
|
|
hdr = dec->file.buffer;
|
|
if (dec->io->seek(dec->index.frames[i - 1].offset, dec->io->seek_data))
|
|
return MP3D_E_IOERROR;
|
|
size_t readed = dec->io->read((uint8_t *)hdr, HDR_SIZE, dec->io->read_data);
|
|
if (readed != HDR_SIZE)
|
|
return MP3D_E_IOERROR;
|
|
frame_size = hdr_frame_bytes(hdr, dec->free_format_bytes) + hdr_padding(hdr);
|
|
readed = dec->io->read((uint8_t *)hdr + HDR_SIZE, frame_size - HDR_SIZE, dec->io->read_data);
|
|
if (readed != (size_t)(frame_size - HDR_SIZE))
|
|
return MP3D_E_IOERROR;
|
|
bs_init(bs, hdr + HDR_SIZE, frame_size - HDR_SIZE);
|
|
} else
|
|
{
|
|
hdr = dec->file.buffer + dec->index.frames[i - 1].offset;
|
|
frame_size = hdr_frame_bytes(hdr, dec->free_format_bytes) + hdr_padding(hdr);
|
|
bs_init(bs, hdr + HDR_SIZE, frame_size - HDR_SIZE);
|
|
}
|
|
if (HDR_IS_CRC(hdr))
|
|
get_bits(bs, 16);
|
|
i--;
|
|
if (L3_read_side_info(bs, gr_info, hdr) < 0)
|
|
break; /* frame not decodable, we can start from here */
|
|
frame_bytes = (bs->limit - bs->pos)/8;
|
|
to_fill_bytes -= MINIMP3_MIN(to_fill_bytes, frame_bytes);
|
|
}
|
|
}
|
|
}
|
|
dec->offset = dec->index.frames[i].offset;
|
|
dec->to_skip = position - dec->index.frames[i].sample;
|
|
while ((i + 1) < dec->index.num_frames && !dec->index.frames[i].sample && !dec->index.frames[i + 1].sample)
|
|
{ /* skip not decodable first frames */
|
|
const uint8_t *hdr;
|
|
if (dec->io)
|
|
{
|
|
hdr = dec->file.buffer;
|
|
if (dec->io->seek(dec->index.frames[i].offset, dec->io->seek_data))
|
|
return MP3D_E_IOERROR;
|
|
size_t readed = dec->io->read((uint8_t *)hdr, HDR_SIZE, dec->io->read_data);
|
|
if (readed != HDR_SIZE)
|
|
return MP3D_E_IOERROR;
|
|
} else
|
|
hdr = dec->file.buffer + dec->index.frames[i].offset;
|
|
dec->to_skip += hdr_frame_samples(hdr)*dec->info.channels;
|
|
i++;
|
|
}
|
|
do_exit:
|
|
if (dec->io)
|
|
{
|
|
if (dec->io->seek(dec->offset, dec->io->seek_data))
|
|
return MP3D_E_IOERROR;
|
|
}
|
|
dec->buffer_samples = 0;
|
|
dec->buffer_consumed = 0;
|
|
dec->input_consumed = 0;
|
|
dec->input_filled = 0;
|
|
dec->last_error = 0;
|
|
mp3dec_init(&dec->mp3d);
|
|
return 0;
|
|
}
|
|
|
|
size_t mp3dec_ex_read_frame(mp3dec_ex_t *dec, mp3d_sample_t **buf, mp3dec_frame_info_t *frame_info, size_t max_samples)
|
|
{
|
|
if (!dec || !buf || !frame_info)
|
|
{
|
|
if (dec)
|
|
dec->last_error = MP3D_E_PARAM;
|
|
return 0;
|
|
}
|
|
if (dec->detected_samples && dec->cur_sample >= dec->detected_samples)
|
|
return 0; /* at end of stream */
|
|
if (dec->last_error)
|
|
return 0; /* error eof state, seek can reset it */
|
|
*buf = NULL;
|
|
uint64_t end_offset = dec->end_offset ? dec->end_offset : dec->file.size;
|
|
int eof = 0;
|
|
while (dec->buffer_consumed == dec->buffer_samples)
|
|
{
|
|
const uint8_t *dec_buf;
|
|
if (dec->io)
|
|
{
|
|
if (!eof && (dec->input_filled - dec->input_consumed) < MINIMP3_BUF_SIZE)
|
|
{ /* keep minimum 10 consecutive mp3 frames (~16KB) worst case */
|
|
memmove((uint8_t*)dec->file.buffer, (uint8_t*)dec->file.buffer + dec->input_consumed, dec->input_filled - dec->input_consumed);
|
|
dec->input_filled -= dec->input_consumed;
|
|
dec->input_consumed = 0;
|
|
size_t readed = dec->io->read((uint8_t*)dec->file.buffer + dec->input_filled, dec->file.size - dec->input_filled, dec->io->read_data);
|
|
if (readed > (dec->file.size - dec->input_filled))
|
|
{
|
|
dec->last_error = MP3D_E_IOERROR;
|
|
readed = 0;
|
|
}
|
|
if (readed != (dec->file.size - dec->input_filled))
|
|
eof = 1;
|
|
dec->input_filled += readed;
|
|
if (eof)
|
|
mp3dec_skip_id3v1((uint8_t*)dec->file.buffer, &dec->input_filled);
|
|
}
|
|
dec_buf = dec->file.buffer + dec->input_consumed;
|
|
if (!(dec->input_filled - dec->input_consumed))
|
|
return 0;
|
|
dec->buffer_samples = mp3dec_decode_frame(&dec->mp3d, dec_buf, dec->input_filled - dec->input_consumed, dec->buffer, frame_info);
|
|
dec->input_consumed += frame_info->frame_bytes;
|
|
} else
|
|
{
|
|
dec_buf = dec->file.buffer + dec->offset;
|
|
uint64_t buf_size = end_offset - dec->offset;
|
|
if (!buf_size)
|
|
return 0;
|
|
dec->buffer_samples = mp3dec_decode_frame(&dec->mp3d, dec_buf, MINIMP3_MIN(buf_size, (uint64_t)INT_MAX), dec->buffer, frame_info);
|
|
}
|
|
dec->buffer_consumed = 0;
|
|
if (dec->info.hz != frame_info->hz || dec->info.layer != frame_info->layer)
|
|
{
|
|
return_e_decode:
|
|
dec->last_error = MP3D_E_DECODE;
|
|
return 0;
|
|
}
|
|
if (dec->buffer_samples)
|
|
{
|
|
dec->buffer_samples *= frame_info->channels;
|
|
if (dec->to_skip)
|
|
{
|
|
size_t skip = MINIMP3_MIN(dec->buffer_samples, dec->to_skip);
|
|
dec->buffer_consumed += skip;
|
|
dec->to_skip -= skip;
|
|
}
|
|
if (
|
|
#ifdef MINIMP3_ALLOW_MONO_STEREO_TRANSITION
|
|
!(dec->flags & MP3D_ALLOW_MONO_STEREO_TRANSITION) &&
|
|
#endif
|
|
dec->buffer_consumed != dec->buffer_samples && dec->info.channels != frame_info->channels)
|
|
{
|
|
goto return_e_decode;
|
|
}
|
|
} else if (dec->to_skip)
|
|
{ /* In mp3 decoding not always can start decode from any frame because of bit reservoir,
|
|
count skip samples for such frames */
|
|
int frame_samples = hdr_frame_samples(dec_buf)*frame_info->channels;
|
|
dec->to_skip -= MINIMP3_MIN(frame_samples, dec->to_skip);
|
|
}
|
|
dec->offset += frame_info->frame_bytes;
|
|
}
|
|
size_t out_samples = MINIMP3_MIN((size_t)(dec->buffer_samples - dec->buffer_consumed), max_samples);
|
|
if (dec->detected_samples)
|
|
{ /* count decoded samples to properly cut padding */
|
|
if (dec->cur_sample + out_samples >= dec->detected_samples)
|
|
out_samples = dec->detected_samples - dec->cur_sample;
|
|
}
|
|
dec->cur_sample += out_samples;
|
|
*buf = dec->buffer + dec->buffer_consumed;
|
|
dec->buffer_consumed += out_samples;
|
|
return out_samples;
|
|
}
|
|
|
|
size_t mp3dec_ex_read(mp3dec_ex_t *dec, mp3d_sample_t *buf, size_t samples)
|
|
{
|
|
if (!dec || !buf)
|
|
{
|
|
if (dec)
|
|
dec->last_error = MP3D_E_PARAM;
|
|
return 0;
|
|
}
|
|
mp3dec_frame_info_t frame_info;
|
|
memset(&frame_info, 0, sizeof(frame_info));
|
|
size_t samples_requested = samples;
|
|
while (samples)
|
|
{
|
|
mp3d_sample_t *buf_frame = NULL;
|
|
size_t read_samples = mp3dec_ex_read_frame(dec, &buf_frame, &frame_info, samples);
|
|
if (!read_samples)
|
|
{
|
|
break;
|
|
}
|
|
memcpy(buf, buf_frame, read_samples * sizeof(mp3d_sample_t));
|
|
buf += read_samples;
|
|
samples -= read_samples;
|
|
}
|
|
return samples_requested - samples;
|
|
}
|
|
|
|
int mp3dec_ex_open_cb(mp3dec_ex_t *dec, mp3dec_io_t *io, int flags)
|
|
{
|
|
if (!dec || !io || (flags & (~MP3D_FLAGS_MASK)))
|
|
return MP3D_E_PARAM;
|
|
memset(dec, 0, sizeof(*dec));
|
|
#ifdef MINIMP3_HAVE_RING
|
|
int ret;
|
|
if (ret = mp3dec_open_ring(&dec->file, MINIMP3_IO_SIZE))
|
|
return ret;
|
|
#else
|
|
dec->file.size = MINIMP3_IO_SIZE;
|
|
dec->file.buffer = (const uint8_t*)malloc(dec->file.size);
|
|
if (!dec->file.buffer)
|
|
return MP3D_E_MEMORY;
|
|
#endif
|
|
dec->flags = flags;
|
|
dec->io = io;
|
|
mp3dec_init(&dec->mp3d);
|
|
if (io->seek(0, io->seek_data))
|
|
return MP3D_E_IOERROR;
|
|
int ret = mp3dec_iterate_cb(io, (uint8_t *)dec->file.buffer, dec->file.size, mp3dec_load_index, dec);
|
|
if (ret && MP3D_E_USER != ret)
|
|
return ret;
|
|
if (dec->io->seek(dec->start_offset, dec->io->seek_data))
|
|
return MP3D_E_IOERROR;
|
|
mp3dec_init(&dec->mp3d);
|
|
dec->buffer_samples = 0;
|
|
dec->indexes_built = !(dec->vbr_tag_found || (flags & MP3D_DO_NOT_SCAN));
|
|
dec->flags &= (~MP3D_DO_NOT_SCAN);
|
|
return 0;
|
|
}
|
|
|
|
|
|
#ifndef MINIMP3_NO_STDIO
|
|
|
|
#if defined(__linux__) || defined(__FreeBSD__)
|
|
#include <errno.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#if !defined(_GNU_SOURCE)
|
|
#include <sys/ipc.h>
|
|
#include <sys/shm.h>
|
|
#endif
|
|
#if !defined(MAP_POPULATE) && defined(__linux__)
|
|
#define MAP_POPULATE 0x08000
|
|
#elif !defined(MAP_POPULATE)
|
|
#define MAP_POPULATE 0
|
|
#endif
|
|
|
|
static void mp3dec_close_file(mp3dec_map_info_t *map_info)
|
|
{
|
|
if (map_info->buffer && MAP_FAILED != map_info->buffer)
|
|
munmap((void *)map_info->buffer, map_info->size);
|
|
map_info->buffer = 0;
|
|
map_info->size = 0;
|
|
}
|
|
|
|
static int mp3dec_open_file(const char *file_name, mp3dec_map_info_t *map_info)
|
|
{
|
|
if (!file_name)
|
|
return MP3D_E_PARAM;
|
|
int file;
|
|
struct stat st;
|
|
memset(map_info, 0, sizeof(*map_info));
|
|
retry_open:
|
|
file = open(file_name, O_RDONLY);
|
|
if (file < 0 && (errno == EAGAIN || errno == EINTR))
|
|
goto retry_open;
|
|
if (file < 0 || fstat(file, &st) < 0)
|
|
{
|
|
close(file);
|
|
return MP3D_E_IOERROR;
|
|
}
|
|
|
|
map_info->size = st.st_size;
|
|
retry_mmap:
|
|
map_info->buffer = (const uint8_t *)mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE | MAP_POPULATE, file, 0);
|
|
if (MAP_FAILED == map_info->buffer && (errno == EAGAIN || errno == EINTR))
|
|
goto retry_mmap;
|
|
close(file);
|
|
if (MAP_FAILED == map_info->buffer)
|
|
return MP3D_E_IOERROR;
|
|
return 0;
|
|
}
|
|
|
|
#if MINIMP3_ENABLE_RING && defined(__linux__) && defined(_GNU_SOURCE)
|
|
#define MINIMP3_HAVE_RING
|
|
static void mp3dec_close_ring(mp3dec_map_info_t *map_info)
|
|
{
|
|
#if defined(__linux__) && defined(_GNU_SOURCE)
|
|
if (map_info->buffer && MAP_FAILED != map_info->buffer)
|
|
munmap((void *)map_info->buffer, map_info->size*2);
|
|
#else
|
|
if (map_info->buffer)
|
|
{
|
|
shmdt(map_info->buffer);
|
|
shmdt(map_info->buffer + map_info->size);
|
|
}
|
|
#endif
|
|
map_info->buffer = 0;
|
|
map_info->size = 0;
|
|
}
|
|
|
|
static int mp3dec_open_ring(mp3dec_map_info_t *map_info, size_t size)
|
|
{
|
|
int memfd, page_size;
|
|
#if defined(__linux__) && defined(_GNU_SOURCE)
|
|
void *buffer;
|
|
int res;
|
|
#endif
|
|
memset(map_info, 0, sizeof(*map_info));
|
|
|
|
#ifdef _SC_PAGESIZE
|
|
page_size = sysconf(_SC_PAGESIZE);
|
|
#else
|
|
page_size = getpagesize();
|
|
#endif
|
|
map_info->size = (size + page_size - 1)/page_size*page_size;
|
|
|
|
#if defined(__linux__) && defined(_GNU_SOURCE)
|
|
memfd = memfd_create("mp3_ring", 0);
|
|
if (memfd < 0)
|
|
return MP3D_E_MEMORY;
|
|
|
|
retry_ftruncate:
|
|
res = ftruncate(memfd, map_info->size);
|
|
if (res && (errno == EAGAIN || errno == EINTR))
|
|
goto retry_ftruncate;
|
|
if (res)
|
|
goto error;
|
|
|
|
retry_mmap:
|
|
map_info->buffer = (const uint8_t *)mmap(NULL, map_info->size*2, PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
|
|
if (MAP_FAILED == map_info->buffer && (errno == EAGAIN || errno == EINTR))
|
|
goto retry_mmap;
|
|
if (MAP_FAILED == map_info->buffer || !map_info->buffer)
|
|
goto error;
|
|
retry_mmap2:
|
|
buffer = mmap((void *)map_info->buffer, map_info->size, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, memfd, 0);
|
|
if (MAP_FAILED == map_info->buffer && (errno == EAGAIN || errno == EINTR))
|
|
goto retry_mmap2;
|
|
if (MAP_FAILED == map_info->buffer || buffer != (void *)map_info->buffer)
|
|
goto error;
|
|
retry_mmap3:
|
|
buffer = mmap((void *)map_info->buffer + map_info->size, map_info->size, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, memfd, 0);
|
|
if (MAP_FAILED == map_info->buffer && (errno == EAGAIN || errno == EINTR))
|
|
goto retry_mmap3;
|
|
if (MAP_FAILED == map_info->buffer || buffer != (void *)(map_info->buffer + map_info->size))
|
|
goto error;
|
|
|
|
close(memfd);
|
|
return 0;
|
|
error:
|
|
close(memfd);
|
|
mp3dec_close_ring(map_info);
|
|
return MP3D_E_MEMORY;
|
|
#else
|
|
memfd = shmget(IPC_PRIVATE, map_info->size, IPC_CREAT | 0700);
|
|
if (memfd < 0)
|
|
return MP3D_E_MEMORY;
|
|
retry_mmap:
|
|
map_info->buffer = (const uint8_t *)mmap(NULL, map_info->size*2, PROT_NONE, MAP_PRIVATE, -1, 0);
|
|
if (MAP_FAILED == map_info->buffer && (errno == EAGAIN || errno == EINTR))
|
|
goto retry_mmap;
|
|
if (MAP_FAILED == map_info->buffer)
|
|
goto error;
|
|
if (map_info->buffer != shmat(memfd, map_info->buffer, 0))
|
|
goto error;
|
|
if ((map_info->buffer + map_info->size) != shmat(memfd, map_info->buffer + map_info->size, 0))
|
|
goto error;
|
|
if (shmctl(memfd, IPC_RMID, NULL) < 0)
|
|
return MP3D_E_MEMORY;
|
|
return 0;
|
|
error:
|
|
shmctl(memfd, IPC_RMID, NULL);
|
|
mp3dec_close_ring(map_info);
|
|
return MP3D_E_MEMORY;
|
|
#endif
|
|
}
|
|
#endif /*MINIMP3_ENABLE_RING*/
|
|
#elif defined(_WIN32)
|
|
#include <windows.h>
|
|
|
|
static void mp3dec_close_file(mp3dec_map_info_t *map_info)
|
|
{
|
|
if (map_info->buffer)
|
|
UnmapViewOfFile(map_info->buffer);
|
|
map_info->buffer = 0;
|
|
map_info->size = 0;
|
|
}
|
|
|
|
static int mp3dec_open_file_h(HANDLE file, mp3dec_map_info_t *map_info)
|
|
{
|
|
memset(map_info, 0, sizeof(*map_info));
|
|
|
|
HANDLE mapping = NULL;
|
|
LARGE_INTEGER s;
|
|
s.LowPart = GetFileSize(file, (DWORD*)&s.HighPart);
|
|
if (s.LowPart == INVALID_FILE_SIZE && GetLastError() != NO_ERROR)
|
|
goto error;
|
|
map_info->size = s.QuadPart;
|
|
|
|
mapping = CreateFileMapping(file, NULL, PAGE_READONLY, 0, 0, NULL);
|
|
if (!mapping)
|
|
goto error;
|
|
map_info->buffer = (const uint8_t*)MapViewOfFile(mapping, FILE_MAP_READ, 0, 0, s.QuadPart);
|
|
CloseHandle(mapping);
|
|
if (!map_info->buffer)
|
|
goto error;
|
|
|
|
CloseHandle(file);
|
|
return 0;
|
|
error:
|
|
mp3dec_close_file(map_info);
|
|
CloseHandle(file);
|
|
return MP3D_E_IOERROR;
|
|
}
|
|
|
|
static int mp3dec_open_file(const char *file_name, mp3dec_map_info_t *map_info)
|
|
{
|
|
if (!file_name)
|
|
return MP3D_E_PARAM;
|
|
HANDLE file = CreateFileA(file_name, GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);
|
|
if (INVALID_HANDLE_VALUE == file)
|
|
return MP3D_E_IOERROR;
|
|
return mp3dec_open_file_h(file, map_info);
|
|
}
|
|
|
|
static int mp3dec_open_file_w(const wchar_t *file_name, mp3dec_map_info_t *map_info)
|
|
{
|
|
if (!file_name)
|
|
return MP3D_E_PARAM;
|
|
HANDLE file = CreateFileW(file_name, GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);
|
|
if (INVALID_HANDLE_VALUE == file)
|
|
return MP3D_E_IOERROR;
|
|
return mp3dec_open_file_h(file, map_info);
|
|
}
|
|
#else
|
|
#include <stdio.h>
|
|
|
|
static void mp3dec_close_file(mp3dec_map_info_t *map_info)
|
|
{
|
|
if (map_info->buffer)
|
|
free((void *)map_info->buffer);
|
|
map_info->buffer = 0;
|
|
map_info->size = 0;
|
|
}
|
|
|
|
static int mp3dec_open_file(const char *file_name, mp3dec_map_info_t *map_info)
|
|
{
|
|
if (!file_name)
|
|
return MP3D_E_PARAM;
|
|
memset(map_info, 0, sizeof(*map_info));
|
|
FILE *file = fopen(file_name, "rb");
|
|
if (!file)
|
|
return MP3D_E_IOERROR;
|
|
int res = MP3D_E_IOERROR;
|
|
long size = -1;
|
|
if (fseek(file, 0, SEEK_END))
|
|
goto error;
|
|
size = ftell(file);
|
|
if (size < 0)
|
|
goto error;
|
|
map_info->size = (size_t)size;
|
|
if (fseek(file, 0, SEEK_SET))
|
|
goto error;
|
|
map_info->buffer = (uint8_t *)malloc(map_info->size);
|
|
if (!map_info->buffer)
|
|
{
|
|
res = MP3D_E_MEMORY;
|
|
goto error;
|
|
}
|
|
if (fread((void *)map_info->buffer, 1, map_info->size, file) != map_info->size)
|
|
goto error;
|
|
fclose(file);
|
|
return 0;
|
|
error:
|
|
mp3dec_close_file(map_info);
|
|
fclose(file);
|
|
return res;
|
|
}
|
|
#endif
|
|
|
|
static int mp3dec_detect_mapinfo(mp3dec_map_info_t *map_info)
|
|
{
|
|
int ret = mp3dec_detect_buf(map_info->buffer, map_info->size);
|
|
mp3dec_close_file(map_info);
|
|
return ret;
|
|
}
|
|
|
|
static int mp3dec_load_mapinfo(mp3dec_t *dec, mp3dec_map_info_t *map_info, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data)
|
|
{
|
|
int ret = mp3dec_load_buf(dec, map_info->buffer, map_info->size, info, progress_cb, user_data);
|
|
mp3dec_close_file(map_info);
|
|
return ret;
|
|
}
|
|
|
|
static int mp3dec_iterate_mapinfo(mp3dec_map_info_t *map_info, MP3D_ITERATE_CB callback, void *user_data)
|
|
{
|
|
int ret = mp3dec_iterate_buf(map_info->buffer, map_info->size, callback, user_data);
|
|
mp3dec_close_file(map_info);
|
|
return ret;
|
|
}
|
|
|
|
static int mp3dec_ex_open_mapinfo(mp3dec_ex_t *dec, int flags)
|
|
{
|
|
int ret = mp3dec_ex_open_buf(dec, dec->file.buffer, dec->file.size, flags);
|
|
dec->is_file = 1;
|
|
if (ret)
|
|
mp3dec_ex_close(dec);
|
|
return ret;
|
|
}
|
|
|
|
int mp3dec_detect(const char *file_name)
|
|
{
|
|
int ret;
|
|
mp3dec_map_info_t map_info;
|
|
if ((ret = mp3dec_open_file(file_name, &map_info)))
|
|
return ret;
|
|
return mp3dec_detect_mapinfo(&map_info);
|
|
}
|
|
|
|
int mp3dec_load(mp3dec_t *dec, const char *file_name, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data)
|
|
{
|
|
int ret;
|
|
mp3dec_map_info_t map_info;
|
|
if ((ret = mp3dec_open_file(file_name, &map_info)))
|
|
return ret;
|
|
return mp3dec_load_mapinfo(dec, &map_info, info, progress_cb, user_data);
|
|
}
|
|
|
|
int mp3dec_iterate(const char *file_name, MP3D_ITERATE_CB callback, void *user_data)
|
|
{
|
|
int ret;
|
|
mp3dec_map_info_t map_info;
|
|
if ((ret = mp3dec_open_file(file_name, &map_info)))
|
|
return ret;
|
|
return mp3dec_iterate_mapinfo(&map_info, callback, user_data);
|
|
}
|
|
|
|
int mp3dec_ex_open(mp3dec_ex_t *dec, const char *file_name, int flags)
|
|
{
|
|
int ret;
|
|
if (!dec)
|
|
return MP3D_E_PARAM;
|
|
if ((ret = mp3dec_open_file(file_name, &dec->file)))
|
|
return ret;
|
|
return mp3dec_ex_open_mapinfo(dec, flags);
|
|
}
|
|
|
|
void mp3dec_ex_close(mp3dec_ex_t *dec)
|
|
{
|
|
#ifdef MINIMP3_HAVE_RING
|
|
if (dec->io)
|
|
mp3dec_close_ring(&dec->file);
|
|
#else
|
|
if (dec->io && dec->file.buffer)
|
|
free((void*)dec->file.buffer);
|
|
#endif
|
|
if (dec->is_file)
|
|
mp3dec_close_file(&dec->file);
|
|
if (dec->index.frames)
|
|
free(dec->index.frames);
|
|
memset(dec, 0, sizeof(*dec));
|
|
}
|
|
|
|
#ifdef _WIN32
|
|
int mp3dec_detect_w(const wchar_t *file_name)
|
|
{
|
|
int ret;
|
|
mp3dec_map_info_t map_info;
|
|
if ((ret = mp3dec_open_file_w(file_name, &map_info)))
|
|
return ret;
|
|
return mp3dec_detect_mapinfo(&map_info);
|
|
}
|
|
|
|
int mp3dec_load_w(mp3dec_t *dec, const wchar_t *file_name, mp3dec_file_info_t *info, MP3D_PROGRESS_CB progress_cb, void *user_data)
|
|
{
|
|
int ret;
|
|
mp3dec_map_info_t map_info;
|
|
if ((ret = mp3dec_open_file_w(file_name, &map_info)))
|
|
return ret;
|
|
return mp3dec_load_mapinfo(dec, &map_info, info, progress_cb, user_data);
|
|
}
|
|
|
|
int mp3dec_iterate_w(const wchar_t *file_name, MP3D_ITERATE_CB callback, void *user_data)
|
|
{
|
|
int ret;
|
|
mp3dec_map_info_t map_info;
|
|
if ((ret = mp3dec_open_file_w(file_name, &map_info)))
|
|
return ret;
|
|
return mp3dec_iterate_mapinfo(&map_info, callback, user_data);
|
|
}
|
|
|
|
int mp3dec_ex_open_w(mp3dec_ex_t *dec, const wchar_t *file_name, int flags)
|
|
{
|
|
int ret;
|
|
if ((ret = mp3dec_open_file_w(file_name, &dec->file)))
|
|
return ret;
|
|
return mp3dec_ex_open_mapinfo(dec, flags);
|
|
}
|
|
#endif
|
|
#else /* MINIMP3_NO_STDIO */
|
|
void mp3dec_ex_close(mp3dec_ex_t *dec)
|
|
{
|
|
#ifdef MINIMP3_HAVE_RING
|
|
if (dec->io)
|
|
mp3dec_close_ring(&dec->file);
|
|
#else
|
|
if (dec->io && dec->file.buffer)
|
|
free((void*)dec->file.buffer);
|
|
#endif
|
|
if (dec->index.frames)
|
|
free(dec->index.frames);
|
|
memset(dec, 0, sizeof(*dec));
|
|
}
|
|
#endif
|
|
|
|
#endif /* MINIMP3_IMPLEMENTATION && !_MINIMP3_EX_IMPLEMENTATION_GUARD */
|