/*
- * Copyright (C) 2003-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2003-2009 Andre Noll <maan@systemlinux.org>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
*/
/** \file mp3_afh.c para_server's mp3 audio format handler */
* Johannes Overmann <overmann@iname.com>
*/
-#include "server.cmdline.h"
-#include "server.h"
-#include "vss.h"
+#include <regex.h>
+
+#include "para.h"
#include "error.h"
-#include "fd.h"
+#include "afh.h"
#include "string.h"
/** \cond some defines and structs which are only used in this file */
unsigned int emphasis;
};
-struct id3tag {
- char title[31];
- char artist[31];
- char album[31];
- char year[5];
- char comment[31];
-};
-
-struct mp3info {
- struct mp3header header;
- int id3_isvalid;
- struct id3tag id3;
- int vbr;
- long unsigned br_average;
- int freq;
-};
-
/** \endcond */
static const int frequencies[3][4] = {
{22050,24000,16000,50000}, /* MPEG 2.0 */
static const int frame_size_index[] = {24000, 72000, 72000};
static const char *mode_text[] = {"stereo", "joint stereo", "dual channel", "mono", "invalid"};
-static struct mp3info mp3;
+#ifdef HAVE_LIBID3TAG
+
+#include <id3tag.h>
+
+static char *get_latin1(id3_ucs4_t const *string)
+{
+ if (!string)
+ return NULL;
+ return (char *)id3_ucs4_latin1duplicate(string);
+}
+
+static char *get_stringlist(union id3_field *field)
+{
+ unsigned int k, nstrings = id3_field_getnstrings(field);
+ char *result = NULL;
+
+ for (k = 0; k < nstrings; k++) {
+ char *tmp = (char *)get_latin1(id3_field_getstrings(field, k));
+ if (result) {
+ char *tmp2 = result;
+ result = make_message("%s %s", tmp2, tmp);
+ free(tmp);
+ free(tmp2);
+ } else
+ result = tmp;
+ }
+ return result;
+}
+
+static char *get_string(union id3_field *field)
+{
+ id3_ucs4_t const *string = id3_field_getfullstring(field);
+
+ return get_latin1(string);
+}
+
+#define FOR_EACH_FIELD(f, j, fr) for (j = 0; j < (fr)->nfields && \
+ (f = id3_frame_field((fr), j)); j++)
+
+static char *get_strings(struct id3_frame *fr)
+{
+ int j;
+ union id3_field *field;
+
+ FOR_EACH_FIELD(field, j, fr) {
+ enum id3_field_type type = id3_field_type(field);
+
+ if (type == ID3_FIELD_TYPE_STRINGLIST)
+ return get_stringlist(field);
+ if (type == ID3_FIELD_TYPE_STRINGFULL)
+ return get_string(field);
+ }
+ return NULL;
+}
+
+static void mp3_get_id3(__a_unused unsigned char *map,
+ __a_unused size_t numbytes, int fd, struct taginfo *tags)
+{
+ int i;
+ struct id3_tag *id3_t;
+ struct id3_file *id3_f = id3_file_fdopen(fd, ID3_FILE_MODE_READONLY);
+
+ if (!id3_f)
+ return;
+ id3_t = id3_file_tag(id3_f);
+ if (!id3_t) {
+ id3_file_close(id3_f);
+ return;
+ }
+ for (i = 0; i < id3_t->nframes; i++) {
+ struct id3_frame *fr = id3_t->frames[i];
+ if (!strcmp(fr->id, "TIT2")) {
+ if (!tags->title)
+ tags->title = get_strings(fr);
+ continue;
+ }
+ if (!strcmp(fr->id, "TPE1")) {
+ if (!tags->artist)
+ tags->artist = get_strings(fr);
+ continue;
+ }
+ if (!strcmp(fr->id, "TALB")) {
+ if (!tags->album)
+ tags->album = get_strings(fr);
+ continue;
+ }
+ if (!strcmp(fr->id, "TDRC")) {
+ if (!tags->year)
+ tags->year = get_strings(fr);
+ continue;
+ }
+ if (!strcmp(fr->id, "COMM")) {
+ if (!tags->comment)
+ tags->comment = get_strings(fr);
+ continue;
+ }
+ }
+ id3_file_close(id3_f);
+}
+
+#else /* HAVE_LIBID3TAG */
+
+/*
+ * Remove trailing whitespace from the end of a string
+ */
+static char *unpad(char *string)
+{
+ char *pos = string + strlen(string) - 1;
+ while (para_isspace(pos[0]))
+ (pos--)[0] = 0;
+ return string;
+}
+
+static void mp3_get_id3(unsigned char *map, size_t numbytes, __a_unused int fd,
+ struct taginfo *tags)
+{
+ char title[31], artist[31], album[31], year[5], comment[31];
+ off_t fpos;
+
+ if (numbytes < 128 || strncmp("TAG", (char *)map + numbytes - 128, 3)) {
+ PARA_DEBUG_LOG("no id3 v1 tag\n");
+ return;
+ }
+ fpos = numbytes - 125;
+ memcpy(title, map + fpos, 30);
+ fpos += 30;
+ title[30] = '\0';
+ memcpy(artist, map + fpos, 30);
+ fpos += 30;
+ artist[30] = '\0';
+ memcpy(album, map + fpos, 30);
+ fpos += 30;
+ album[30] = '\0';
+ memcpy(year, map + fpos, 4);
+ fpos += 4;
+ year[4] = '\0';
+ memcpy(comment, map + fpos, 30);
+ comment[30] = '\0';
+ unpad(title);
+ unpad(artist);
+ unpad(album);
+ unpad(year);
+ unpad(comment);
+ tags->artist = para_strdup(artist);
+ tags->title = para_strdup(title);
+ tags->year = para_strdup(year);
+ tags->album = para_strdup(album);
+ tags->comment = para_strdup(comment);
+}
+#endif /* HAVE_LIBID3TAG */
static int header_frequency(struct mp3header *h)
{
h->mode = 4; /* invalid */
return mode_text[h->mode];
}
+
+static int header_channels(struct mp3header *h)
+{
+ if (h->mode > 3)
+ return 0;
+ if (h->mode < 3)
+ return 2;
+ return 1;
+}
+
static int header_bitrate(struct mp3header *h)
{
- if (h->layer > 3 || h->bitrate > 14)
+ if (!h->layer || h->layer > 3 || h->bitrate > 14 || !h->bitrate)
return -E_HEADER_BITRATE;
return mp3info_bitrate[h->version & 1][3 - h->layer][h->bitrate - 1];
}
+ header->padding;
}
-static void write_info_str(struct audio_format_info *afi)
-{
- int v = mp3.id3_isvalid;
-
- snprintf(afi->info_string, MMD_INFO_SIZE,
- "audio_file_info1:%lu x %lums, %lu kbit/s (%cbr) %i KHz %s\n"
- "audio_file_info2:%s, by %s\n"
- "audio_file_info3:A: %s, Y: %s, C: %s\n",
- afi->chunks_total,
- tv2ms(&afi->chunk_tv),
- mp3.br_average,
- mp3.vbr? 'v' : 'c',
- mp3.freq / 1000,
- header_mode(&mp3.header),
- v && *mp3.id3.title? mp3.id3.title : "(title tag not set)",
- v && *mp3.id3.artist? mp3.id3.artist : "(artist tag not set)",
- v && *mp3.id3.album? mp3.id3.album : "(album tag not set)",
- v && *mp3.id3.year? mp3.id3.year : "????",
- v && *mp3.id3.comment? mp3.id3.comment : "(comment tag not set)"
- );
-}
-
-/*
- * Remove trailing whitespace from the end of a string
- */
-static char *unpad(char *string)
-{
- char *pos = string + strlen(string) - 1;
- while (isspace(pos[0]))
- (pos--)[0] = 0;
- return string;
-}
-
static int compare_headers(struct mp3header *h1,struct mp3header *h2)
{
- if ((*(uint*)h1) == (*(uint*)h2))
+ if ((*(unsigned int*)h1) == (*(unsigned int*)h2))
return 1;
if ((h1->version == h2->version) &&
(h1->layer == h2->layer) &&
return 0;
}
-/**
+/*
* get next MP3 frame header.
*
- * \param stream to read the header from
- * \param header structure that gets filled in by get_header()
- *
- * \return On success, the header frame length is returned. A return value of
- * zero means that we did not retrieve a valid frame header, and a negative
- * return value indicates an error.
+ * On success, the header frame length is returned and the given header
+ * structure that is filled in. A return value of zero means that we did not
+ * retrieve a valid frame header, and a negative return value indicates an
+ * error.
*/
-static int get_header(FILE *file, struct mp3header *header)
+static int get_header(unsigned char *map, size_t numbytes, off_t *fpos,
+ struct mp3header *header)
{
- unsigned char buffer[FRAME_HEADER_SIZE];
int fl, ret;
- if (!file || !header)
- return -E_MP3_NO_FILE;
- ret = para_fread(buffer, FRAME_HEADER_SIZE, 1, file);
- if (ret < FRAME_HEADER_SIZE) {
+ if (*fpos + FRAME_HEADER_SIZE > numbytes) {
+ *fpos = numbytes - 1;
header->sync = 0;
- return ret < 0? ret : 0;
+ return 0;
}
- header->layer = (buffer[1] >> 1) & 3;
- header->sync = (((int)buffer[0]<<4) | ((int)(buffer[1]&0xE0)>>4));
- if (buffer[1] & 0x10)
- header->version = (buffer[1] >> 3) & 1;
+ header->layer = (map[*fpos + 1] >> 1) & 3;
+ header->sync = (((int)map[*fpos]<<4) | ((int)(map[*fpos + 1]&0xE0)>>4));
+ if (map[*fpos + 1] & 0x10)
+ header->version = (map[*fpos + 1] >> 3) & 1;
else
header->version = 2;
if ((header->sync != 0xFFE) || (header->layer != 1)) {
+ ret = 0;
header->sync = 0;
-// PARA_DEBUG_LOG("%s: header not found\n", __func__);
- return 0;
+ goto out;
}
- header->crc = buffer[1] & 1;
- header->bitrate = (buffer[2] >> 4) & 0x0F;
-// PARA_DEBUG_LOG("%s: found header, bitrate: %u\n", __func__,
-// header->bitrate);
- header->freq = (buffer[2] >> 2) & 0x3;
- header->padding = (buffer[2] >>1) & 0x1;
- header->mode = (buffer[3] >> 6) & 0x3;
+ header->crc = map[*fpos + 1] & 1;
+ header->bitrate = (map[*fpos + 2] >> 4) & 0x0F;
+ header->freq = (map[*fpos + 2] >> 2) & 0x3;
+ header->padding = (map[*fpos + 2] >>1) & 0x1;
+ header->mode = (map[*fpos + 3] >> 6) & 0x3;
fl = frame_length(header);
- return (fl >= MIN_FRAME_SIZE)? fl : -E_FRAME_LENGTH;
+ ret = (fl >= MIN_FRAME_SIZE)? fl : -E_FRAME_LENGTH;
+out:
+ *fpos += FRAME_HEADER_SIZE;
+ return ret;
}
-/**
+/*
* find the next mp3 header
*
- * \return On success, the length of the next frame header. If the end of the
- * file was reached, the function returns zero. On errors, a negative value is
- * returned.
- *
+ * Return the length of the next frame header or zero if the end of the file is
+ * reached.
*/
-static int mp3_seek_next_header(FILE *file)
+static int mp3_seek_next_header(unsigned char *map, size_t numbytes, off_t *fpos,
+ struct mp3header *result)
{
- int k, l = 0, c, first_len, ret;
+ int k, l = 0, first_len;
struct mp3header h, h2;
long valid_start = 0;
- while (1) {
- while ((c = fgetc(file)) != 255 && (c != EOF))
- ; /* nothing */
- if (c != 255)
- return 0;
- ungetc(c, file);
- valid_start = ftell(file);
- first_len = get_header(file, &h);
+ for (; *fpos < numbytes; (*fpos)++) {
+ if (map[*fpos] != 0xff)
+ continue;
+ valid_start = *fpos;
+ first_len = get_header(map, numbytes, fpos, &h);
if (first_len <= 0)
continue;
- ret = para_fseek(file, first_len - FRAME_HEADER_SIZE, SEEK_CUR);
- if (ret < 0)
- return ret;
+ *fpos += first_len - FRAME_HEADER_SIZE;
for (k = 1; k < MIN_CONSEC_GOOD_FRAMES; k++) {
- if ((l = get_header(file, &h2)) <= 0)
+ if ((l = get_header(map, numbytes, fpos, &h2)) <= 0)
break;
if (!compare_headers(&h, &h2))
break;
- ret = para_fseek(file, l - FRAME_HEADER_SIZE, SEEK_CUR);
- if (ret < 0)
- return ret;
+ *fpos += l - FRAME_HEADER_SIZE;
}
if (k == MIN_CONSEC_GOOD_FRAMES) {
- ret = para_fseek(file, valid_start, SEEK_SET);
- if (ret < 0)
- return ret;
- memcpy(&(mp3.header), &h2, sizeof(struct mp3header));
+ *fpos = valid_start;
+ *result = h2;
return first_len;
}
}
+ return 0;
}
-static int mp3_get_id3(FILE *file)
-{
- char fbuf[4];
- int ret;
-
- mp3.id3_isvalid = 0;
- mp3.id3.title[0] = '\0';
- mp3.id3.artist[0] = '\0';
- mp3.id3.album[0] = '\0';
- mp3.id3.comment[0] = '\0';
- mp3.id3.year[0] = '\0';
- ret = para_fseek(file, -128, SEEK_END);
- if (ret < 0 )
- return ret;
- if (para_fread(fbuf, 1, 3, file) < 0)
- return -E_FREAD;
- fbuf[3] = '\0';
- if (strcmp("TAG", fbuf)) {
- PARA_INFO_LOG("%s", "no id3 tag\n");
- return 0;
- }
- ret = para_fseek(file, -125, SEEK_END);
- if (ret < 0)
- return ret;
- if (para_fread(mp3.id3.title, 1, 30, file) != 30)
- return -E_FREAD;
- mp3.id3.title[30] = '\0';
- if (para_fread(mp3.id3.artist, 1, 30, file) != 30)
- return -E_FREAD;
- mp3.id3.artist[30] = '\0';
- if (para_fread(mp3.id3.album, 1, 30, file) != 30)
- return -E_FREAD;
- mp3.id3.album[30] = '\0';
- if (para_fread(mp3.id3.year, 1, 4, file) != 4)
- return -E_FREAD;
- mp3.id3.year[4] = '\0';
- if (para_fread(mp3.id3.comment, 1, 30, file) != 30)
- return -E_FREAD;
- mp3.id3.comment[30] = '\0';
- mp3.id3_isvalid = 1;
- unpad(mp3.id3.title);
- unpad(mp3.id3.artist);
- unpad(mp3.id3.album);
- unpad(mp3.id3.year);
- unpad(mp3.id3.comment);
- return 1;
-}
-
-static int find_valid_start(FILE *file)
+static int find_valid_start(unsigned char *map, size_t numbytes, off_t *fpos,
+ struct mp3header *header)
{
- int ret, frame_len;
+ int frame_len;
- frame_len = get_header(file, &mp3.header);
+ frame_len = get_header(map, numbytes, fpos, header);
if (frame_len < 0)
return frame_len;
if (!frame_len) {
- frame_len = mp3_seek_next_header(file);
+ frame_len = mp3_seek_next_header(map, numbytes, fpos, header);
if (frame_len <= 0)
return frame_len;
- } else {
- ret = para_fseek(file, -FRAME_HEADER_SIZE, SEEK_CUR);
- if (ret < 0)
- return ret;
- }
+ } else
+ *fpos -= FRAME_HEADER_SIZE;
if (frame_len <= 1)
return -E_FRAME_LENGTH;
return frame_len;
}
-static int mp3_read_info(FILE *file, struct audio_format_info *afi)
+static int mp3_read_info(unsigned char *map, size_t numbytes, int fd,
+ struct afh_info *afhi)
{
- long fl_avg = 0, freq_avg = 0, br_avg = 0;
- int ret, len = 0, old_br = -1;
+ uint64_t freq_sum = 0, br_sum = 0;
+ int fl = 0, ret, len = 0, old_br = -1, vbr = 0;
struct timeval total_time = {0, 0};
unsigned chunk_table_size = 1000; /* gets increased on demand */
+ off_t fpos = 0;
+ struct mp3header header;
- afi->chunks_total = 0;
- afi->chunk_table = para_malloc(chunk_table_size * sizeof(size_t));
- ret = mp3_get_id3(file);
- if (ret < 0)
- goto err_out;
- rewind(file);
- mp3.vbr = 0;
- mp3.freq = 0;
+ afhi->chunks_total = 0;
+ afhi->chunk_table = para_malloc(chunk_table_size * sizeof(uint32_t));
while (1) {
- int freq, br, fl;
+ int freq, br;
struct timeval tmp, cct; /* current chunk time */
- if (len > 0) {
- ret = para_fseek(file, len, SEEK_CUR);
- if (ret < 0)
+ fpos += len;
+ len = find_valid_start(map, numbytes, &fpos, &header);
+ if (len <= 0) {
+ size_t end;
+ ret = -E_MP3_INFO;
+ if (!afhi->chunks_total)
goto err_out;
- }
- len = find_valid_start(file);
- if (len <= 0)
+ end = afhi->chunk_table[afhi->chunks_total - 1] + fl;
+ afhi->chunk_table[afhi->chunks_total]
+ = PARA_MIN(end, numbytes);
break;
- freq = header_frequency(&mp3.header);
- br = header_bitrate(&mp3.header);
- fl = frame_length(&mp3.header);
- if (freq < 0 || br < 0 || fl < 0)
+ }
+ ret = header_frequency(&header);
+ if (ret < 0)
+ continue;
+ freq = ret;
+ ret = header_bitrate(&header);
+ if (ret < 0)
+ continue;
+ br = ret;
+ ret = frame_length(&header);
+ if (ret < 0)
continue;
+ fl = ret;
tmp.tv_sec = fl;
tmp.tv_usec = 0;
tv_divide(br * 125, &tmp, &cct);
tv_add(&cct, &total_time, &tmp);
total_time = tmp;
- //PARA_DEBUG_LOG("%s: br: %d, freq: %d, fl: %d, cct: %lu\n", __func__, br, freq, fl, cct.tv_usec);
- if (afi->chunks_total >= chunk_table_size) {
+ if (afhi->chunks_total >= chunk_table_size) {
chunk_table_size *= 2;
- afi->chunk_table = para_realloc(afi->chunk_table,
- chunk_table_size * sizeof(size_t));
+ afhi->chunk_table = para_realloc(afhi->chunk_table,
+ chunk_table_size * sizeof(uint32_t));
}
- afi->chunk_table[afi->chunks_total] = ftell(file);
- if (afi->chunks_total < 10 || !(afi->chunks_total % 1000))
- PARA_INFO_LOG("chunk #%lu: %zd\n", afi->chunks_total,
- afi->chunk_table[afi->chunks_total]);
- afi->chunks_total++;
- if (afi->chunks_total == 1) {
- freq_avg = freq;
- br_avg = br;
- old_br = br;
- fl_avg = fl;
- continue;
- }
- freq_avg += (freq - freq_avg) / (afi->chunks_total + 1);
- fl_avg += (fl - fl_avg) / (afi->chunks_total + 1);
- br_avg += (br - br_avg) / (afi->chunks_total + 1);
- if (old_br != br)
- mp3.vbr = 1;
+ afhi->chunk_table[afhi->chunks_total] = fpos;
+ afhi->chunks_total++;
+ freq_sum += freq;
+ br_sum += br;
+ if (afhi->chunks_total != 1 && old_br != br)
+ vbr = 1;
old_br = br;
}
ret = -E_MP3_INFO;
- if (!afi->chunks_total || !freq_avg || !br_avg)
- goto err_out;
- ret= para_fseek(file, 0, SEEK_END);
- if (ret < 0)
+ if (!freq_sum || !br_sum)
goto err_out;
- afi->chunk_table[afi->chunks_total] = ftell(file);
- mp3.br_average = br_avg;
- mp3.freq = freq_avg;
- afi->seconds_total = (tv2ms(&total_time) + 500) / 1000;
- tv_divide(afi->chunks_total, &total_time, &afi->chunk_tv);
- rewind(file);
- PARA_DEBUG_LOG("%lu chunks, each %lums\n", afi->chunks_total,
- tv2ms(&afi->chunk_tv));
- tv_scale(3, &afi->chunk_tv, &afi->eof_tv);
- PARA_DEBUG_LOG("eof timeout: %lu\n", tv2ms(&afi->eof_tv));
+ afhi->bitrate = br_sum / afhi->chunks_total;
+ afhi->frequency = freq_sum / afhi->chunks_total;
+ afhi->channels = header_channels(&header);
+ afhi->seconds_total = (tv2ms(&total_time) + 500) / 1000;
+ tv_divide(afhi->chunks_total, &total_time, &afhi->chunk_tv);
+ PARA_DEBUG_LOG("%lu chunks, each %lums\n", afhi->chunks_total,
+ tv2ms(&afhi->chunk_tv));
+ afhi->techinfo = make_message("%cbr, %s", vbr? 'v' : 'c',
+ header_mode(&header));
+ mp3_get_id3(map, numbytes, fd, &afhi->tags);
return 1;
err_out:
- PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
- free(afi->chunk_table);
+ PARA_ERROR_LOG("%s\n", para_strerror(-ret));
+ free(afhi->chunk_table);
return ret;
}
/*
* Read mp3 information from audio file
*/
-static int mp3_get_file_info(FILE *file, struct audio_format_info *afi)
+static int mp3_get_file_info(char *map, size_t numbytes, int fd,
+ struct afh_info *afhi)
{
int ret;
- ret = mp3_read_info(file, afi);
+ ret = mp3_read_info((unsigned char *)map, numbytes, fd, afhi);
if (ret < 0)
return ret;
- write_info_str(afi);
- if (afi->seconds_total < 2 || !afi->chunks_total)
+ if (afhi->seconds_total < 2 || !afhi->chunks_total)
return -E_MP3_INFO;
return 1;
}
projects / paraslash.git / blobdiff