#include "server.cmdline.h"
#include "server.h"
#include "vss.h"
-#include "afh.h"
#include "error.h"
#include "fd.h"
+#include "string.h"
/** \cond some defines and structs which are only used in this file */
* MIN_CONSEC_GOOD_FRAMES defines how many consecutive valid MP3 frames we need
* to see before we decide we are looking at a real MP3 file
*/
-#define MIN_CONSEC_GOOD_FRAMES 3
-
+#define MIN_CONSEC_GOOD_FRAMES 4
#define FRAME_HEADER_SIZE 4
#define MIN_FRAME_SIZE 21
};
struct mp3info {
- char *filename;
- FILE *file;
struct mp3header header;
int id3_isvalid;
struct id3tag id3;
int vbr;
long unsigned br_average;
- long unsigned seconds;
- int frames;
int freq;
};
/** \endcond */
-static int frequencies[3][4] = {
+static const int frequencies[3][4] = {
{22050,24000,16000,50000}, /* MPEG 2.0 */
{44100,48000,32000,50000}, /* MPEG 1.0 */
{11025,12000,8000,50000} /* MPEG 2.5 */
};
-static int mp3info_bitrate[2][3][14] = {
+static const int mp3info_bitrate[2][3][14] = {
{ /* MPEG 2.0 */
{32,48,56,64,80,96,112,128,144,160,176,192,224,256}, /* layer 1 */
{8,16,24,32,40,48,56,64,80,96,112,128,144,160}, /* layer 2 */
}
};
-static int frame_size_index[] = {24000, 72000, 72000};
+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;
-static char mp3buf[8192];
-static int chunk_size;
-static struct audio_format_handler *af;
static int header_frequency(struct mp3header *h)
{
+ header->padding;
}
-static void write_info_str(char *info_str)
+static void write_info_str(struct audio_format_info *afi)
{
int v = mp3.id3_isvalid;
- snprintf(info_str, MMD_INFO_SIZE,
- "audio_file_info1:%d x %lums, %lu kbit/s (%cbr) %i KHz %s\n"
+ 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",
- mp3.frames,
- tv2ms(&af->chunk_tv),
+ afi->chunks_total,
+ tv2ms(&afi->chunk_tv),
mp3.br_average,
mp3.vbr? 'v' : 'c',
mp3.freq / 1000,
(h1->original == h2->original) &&
(h1->emphasis == h2->emphasis))
return 1;
- else
- return 0;
+ return 0;
}
/**
* returned.
*
*/
-static int mp3_seek_next_header(void)
+static int mp3_seek_next_header(FILE *file)
{
- int k, l = 0, c, first_len;
+ int k, l = 0, c, first_len, ret;
struct mp3header h, h2;
long valid_start = 0;
while (1) {
- while ((c = fgetc(mp3.file)) != 255 && (c != EOF))
+ while ((c = fgetc(file)) != 255 && (c != EOF))
; /* nothing */
if (c != 255)
return 0;
- ungetc(c, mp3.file);
- valid_start = ftell(mp3.file);
- first_len = get_header(mp3.file, &h);
+ ungetc(c, file);
+ valid_start = ftell(file);
+ first_len = get_header(file, &h);
if (first_len <= 0)
continue;
- if (fseek(mp3.file, first_len - FRAME_HEADER_SIZE, SEEK_CUR) < 0)
- return -E_FSEEK;
+ ret = para_fseek(file, first_len - FRAME_HEADER_SIZE, SEEK_CUR);
+ if (ret < 0)
+ return ret;
for (k = 1; k < MIN_CONSEC_GOOD_FRAMES; k++) {
- if ((l = get_header(mp3.file, &h2)) <= 0)
+ if ((l = get_header(file, &h2)) <= 0)
break;
if (!compare_headers(&h, &h2))
break;
- fseek(mp3.file, l - FRAME_HEADER_SIZE, SEEK_CUR);
+ ret = para_fseek(file, l - FRAME_HEADER_SIZE, SEEK_CUR);
+ if (ret < 0)
+ return ret;
}
if (k == MIN_CONSEC_GOOD_FRAMES) {
- fseek(mp3.file, valid_start, SEEK_SET);
+ ret = para_fseek(file, valid_start, SEEK_SET);
+ if (ret < 0)
+ return ret;
memcpy(&(mp3.header), &h2, sizeof(struct mp3header));
return first_len;
}
}
}
-static int mp3_get_id3(void)
+static int mp3_get_id3(FILE *file)
{
char fbuf[4];
+ int ret;
mp3.id3_isvalid = 0;
mp3.id3.title[0] = '\0';
mp3.id3.album[0] = '\0';
mp3.id3.comment[0] = '\0';
mp3.id3.year[0] = '\0';
- if (fseek(mp3.file, -128, SEEK_END))
- return -E_FSEEK;
- if (para_fread(fbuf, 1, 3, mp3.file) < 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;
}
- if (fseek(mp3.file, -125, SEEK_END) < 0)
- return -E_FSEEK;
- if (para_fread(mp3.id3.title, 1, 30, mp3.file) != 30)
+ 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, mp3.file) != 30)
+ 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, mp3.file) != 30)
+ 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, mp3.file) != 4)
+ 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, mp3.file) != 30)
+ if (para_fread(mp3.id3.comment, 1, 30, file) != 30)
return -E_FREAD;
mp3.id3.comment[30] = '\0';
mp3.id3_isvalid = 1;
return 1;
}
-static int find_valid_start(void)
+static int find_valid_start(FILE *file)
{
- int frame_len;
+ int ret, frame_len;
- if (!mp3.file)
- return -E_MP3_NO_FILE;
- frame_len = get_header(mp3.file, &mp3.header);
+ frame_len = get_header(file, &mp3.header);
if (frame_len < 0)
return frame_len;
if (!frame_len) {
- frame_len = mp3_seek_next_header();
+ frame_len = mp3_seek_next_header(file);
if (frame_len <= 0)
return frame_len;
- } else
- if (fseek(mp3.file, -FRAME_HEADER_SIZE, SEEK_CUR) < 0)
- return -E_FSEEK;
- if (frame_len <= 1) /* FRAME_HEADER_SIZE? */
+ } else {
+ ret = para_fseek(file, -FRAME_HEADER_SIZE, SEEK_CUR);
+ if (ret < 0)
+ return ret;
+ }
+ if (frame_len <= 1)
return -E_FRAME_LENGTH;
return frame_len;
}
-static int mp3_read_info(void)
+static int mp3_read_info(FILE *file, struct audio_format_info *afi)
{
- long fl_avg = 0, freq_avg = 0, br_avg = 0, fcount = 0;
+ long fl_avg = 0, freq_avg = 0, br_avg = 0;
int ret, len = 0, old_br = -1;
struct timeval total_time = {0, 0};
+ unsigned chunk_table_size = 1000; /* gets increased on demand */
- ret = mp3_get_id3();
+ afi->chunks_total = 0;
+ afi->chunk_table = para_malloc(chunk_table_size * sizeof(size_t));
+ ret = mp3_get_id3(file);
if (ret < 0)
- return ret;
- rewind(mp3.file);
+ goto err_out;
+ rewind(file);
mp3.vbr = 0;
mp3.freq = 0;
while (1) {
int freq, br, fl;
struct timeval tmp, cct; /* current chunk time */
- if (len > 0)
- if (fseek(mp3.file, len, SEEK_CUR) < 0)
- return -E_FSEEK;
- len = find_valid_start();
+ if (len > 0) {
+ ret = para_fseek(file, len, SEEK_CUR);
+ if (ret < 0)
+ goto err_out;
+ }
+ len = find_valid_start(file);
if (len <= 0)
break;
freq = header_frequency(&mp3.header);
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);
- fcount++;
- if (fcount == 1) {
+ //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) {
+ chunk_table_size *= 2;
+ afi->chunk_table = para_realloc(afi->chunk_table,
+ chunk_table_size * sizeof(size_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) / (fcount + 1);
- fl_avg += (fl - fl_avg) / (fcount + 1);
- br_avg += (br - br_avg) / (fcount + 1);
+ 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;
old_br = br;
}
- if (!fcount || !freq_avg || !br_avg)
- return -E_MP3_INFO;
+ 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)
+ goto err_out;
+ afi->chunk_table[afi->chunks_total] = ftell(file);
mp3.br_average = br_avg;
mp3.freq = freq_avg;
- mp3.frames = fcount;
- mp3.seconds = (tv2ms(&total_time) + 500) / 1000;
- tv_divide(fcount, &total_time, &af->chunk_tv);
- rewind(mp3.file);
- PARA_DEBUG_LOG("chunk_time: %lums\n", tv2ms(&af->chunk_tv));
- tv_scale(3, &af->chunk_tv, &af->eof_tv);
- PARA_DEBUG_LOG("eof timeout: %lu\n", tv2ms(&af->eof_tv));
+ 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));
return 1;
+err_out:
+ PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
+ free(afi->chunk_table);
+ return ret;
}
/*
* Read mp3 information from audio file
*/
-static int mp3_get_file_info(FILE *audio_file, char *info_str,
- long unsigned *frames, int *seconds)
+static int mp3_get_file_info(FILE *file, struct audio_format_info *afi)
{
int ret;
- if (!audio_file)
- return -E_MP3_NO_FILE;
- mp3.file = audio_file;
- ret = mp3_read_info();
- if (ret < 0) {
- mp3.file = NULL;
+ ret = mp3_read_info(file, afi);
+ if (ret < 0)
return ret;
- }
- write_info_str(info_str);
- *frames = mp3.frames;
- *seconds = mp3.seconds;
- if (*seconds < 2 || !*frames)
+ write_info_str(afi);
+ if (afi->seconds_total < 2 || !afi->chunks_total)
return -E_MP3_INFO;
return 1;
}
-static int mp3_reposition_stream(long unsigned new_frame)
-{
- int count = 0, len;
-
- PARA_DEBUG_LOG("jmp to frame %lu/%i\n", new_frame, mp3.frames);
- rewind(mp3.file);
- while (count < new_frame && (len = find_valid_start()) > 0) {
-// PARA_DEBUG_LOG("%s: jmp to frame %d\n", __func__, count);
- if (fseek(mp3.file, len, SEEK_CUR) < 0)
- return -E_FSEEK;
- count++;
- }
- if (count != new_frame) {
- rewind(mp3.file);
- return -E_MP3_REPOS;
- }
- return 1;
-}
-
-static int mp3_read_next_chunk(void)
-{
- int len = find_valid_start();
-
- if (len <= 0) {
- if (len < 0)
- PARA_ERROR_LOG("invalid frame len (%d)\n", len);
- return len;
- }
- chunk_size = para_fread(mp3buf, len, 1, mp3.file);
- if (len != chunk_size)
- PARA_DEBUG_LOG("short read (%d/%d)\n", chunk_size, len);
- return chunk_size;
-}
-
-static char *mp3_read_chunk(__a_unused long unsigned chunk_num, ssize_t *len)
-{
- *len = mp3_read_next_chunk();
- if (*len <= 0)
- return NULL;
- return mp3buf;
-}
-
-static void mp3_close_audio_file(void)
-{
- if (!mp3.file)
- return;
- fclose(mp3.file);
- mp3.file = NULL;
-}
-
static const char* mp3_suffixes[] = {"mp3", NULL};
-void mp3_init(struct audio_format_handler *p)
+
+/**
+ * the init function of the mp3 audio format handler
+ *
+ * \param afh pointer to the struct to initialize
+ */
+void mp3_init(struct audio_format_handler *afh)
{
- af = p;
- af->get_file_info = mp3_get_file_info;
- af->reposition_stream = mp3_reposition_stream;
- af->read_chunk = mp3_read_chunk;
- af->close_audio_file = mp3_close_audio_file;
- af->get_header_info = NULL;
- /* eof_tv gets overwritten in mp3_get_file_info() */
- af->eof_tv.tv_sec = 0;
- af->eof_tv.tv_usec = 100 * 1000;
- af->suffixes = mp3_suffixes;
+ afh->get_file_info = mp3_get_file_info;
+ afh->suffixes = mp3_suffixes;
}
projects / paraslash.git / blobdiff