*/
#include "avformat.h"
#include "mpegaudio.h"
+#include "avstring.h"
+#include "mpegaudiodecheader.h"
#define ID3v2_HEADER_SIZE 10
#define ID3v1_TAG_SIZE 128
taglen--; /* account for encoding type byte */
dstlen--; /* Leave space for zero terminator */
- switch(get_byte(&s->pb)) { /* encoding type */
+ switch(get_byte(s->pb)) { /* encoding type */
case 0: /* ISO-8859-1 (0 - 255 maps directly into unicode) */
q = dst;
while(taglen--) {
uint8_t tmp;
- PUT_UTF8(get_byte(&s->pb), tmp, if (q - dst < dstlen - 1) *q++ = tmp;)
+ PUT_UTF8(get_byte(s->pb), tmp, if (q - dst < dstlen - 1) *q++ = tmp;)
}
*q = '\0';
break;
case 3: /* UTF-8 */
len = FFMIN(taglen, dstlen);
- get_buffer(&s->pb, dst, len);
+ get_buffer(s->pb, dst, len);
dst[len] = 0;
break;
}
taghdrlen = 6;
break;
- case 3 ... 4:
+ case 3:
+ case 4:
isv34 = 1;
taghdrlen = 10;
break;
}
if(isv34 && flags & 0x40) /* Extended header present, just skip over it */
- url_fskip(&s->pb, id3v2_get_size(&s->pb, 4));
+ url_fskip(s->pb, id3v2_get_size(s->pb, 4));
while(len >= taghdrlen) {
if(isv34) {
- tag = get_be32(&s->pb);
- tlen = id3v2_get_size(&s->pb, 4);
- get_be16(&s->pb); /* flags */
+ tag = get_be32(s->pb);
+ tlen = id3v2_get_size(s->pb, 4);
+ get_be16(s->pb); /* flags */
} else {
- tag = get_be24(&s->pb);
- tlen = id3v2_get_size(&s->pb, 3);
+ tag = get_be24(s->pb);
+ tlen = id3v2_get_size(s->pb, 3);
}
len -= taghdrlen + tlen;
if(len < 0)
break;
- next = url_ftell(&s->pb) + tlen;
+ next = url_ftell(s->pb) + tlen;
switch(tag) {
case MKBETAG('T', 'I', 'T', '2'):
break;
case 0:
/* padding, skip to end */
- url_fskip(&s->pb, len);
+ url_fskip(s->pb, len);
len = 0;
continue;
}
/* Skip to end of tag */
- url_fseek(&s->pb, next, SEEK_SET);
+ url_fseek(s->pb, next, SEEK_SET);
}
if(version == 4 && flags & 0x10) /* Footer preset, always 10 bytes, skip over it */
- url_fskip(&s->pb, 10);
+ url_fskip(s->pb, 10);
return;
error:
av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n", version, reason);
- url_fskip(&s->pb, len);
+ url_fskip(s->pb, len);
}
static void id3v1_get_string(char *str, int str_size,
s->track = buf[126];
genre = buf[127];
if (genre <= ID3v1_GENRE_MAX)
- pstrcpy(s->genre, sizeof(s->genre), id3v1_genre_str[genre]);
+ av_strlcpy(s->genre, id3v1_genre_str[genre], sizeof(s->genre));
return 0;
}
static int mp3_read_probe(AVProbeData *p)
{
- int max_frames, first_frames;
+ int max_frames, first_frames = 0;
int fsize, frames, sample_rate;
uint32_t header;
uint8_t *buf, *buf2, *end;
max_frames = 0;
buf = p->buf;
- end = buf + FFMIN(4096, p->buf_size - sizeof(uint32_t));
+ end = buf + p->buf_size - sizeof(uint32_t);
- for(; buf < end; buf++) {
+ for(; buf < end; buf= buf2+1) {
buf2 = buf;
for(frames = 0; buf2 < end; frames++) {
- header = (buf2[0] << 24) | (buf2[1] << 16) | (buf2[2] << 8) | buf2[3];
+ header = AV_RB32(buf2);
fsize = ff_mpa_decode_header(&avctx, header, &sample_rate);
if(fsize < 0)
break;
first_frames= frames;
}
if (first_frames>=3) return AVPROBE_SCORE_MAX/2+1;
+ else if(max_frames>500)return AVPROBE_SCORE_MAX/2;
else if(max_frames>=3) return AVPROBE_SCORE_MAX/4;
else if(max_frames>=1) return 1;
else return 0;
}
+/**
+ * Try to find Xing/Info/VBRI tags and compute duration from info therein
+ */
+static void mp3_parse_vbr_tags(AVFormatContext *s, AVStream *st, offset_t base)
+{
+ uint32_t v, spf;
+ int frames = -1; /* Total number of frames in file */
+ const offset_t xing_offtbl[2][2] = {{32, 17}, {17,9}};
+ MPADecodeContext c;
+
+ v = get_be32(s->pb);
+ if(ff_mpa_check_header(v) < 0)
+ return;
+
+ ff_mpegaudio_decode_header(&c, v);
+ if(c.layer != 3)
+ return;
+
+ /* Check for Xing / Info tag */
+ url_fseek(s->pb, xing_offtbl[c.lsf == 1][c.nb_channels == 1], SEEK_CUR);
+ v = get_be32(s->pb);
+ if(v == MKBETAG('X', 'i', 'n', 'g') || v == MKBETAG('I', 'n', 'f', 'o')) {
+ v = get_be32(s->pb);
+ if(v & 0x1)
+ frames = get_be32(s->pb);
+ }
+
+ /* Check for VBRI tag (always 32 bytes after end of mpegaudio header) */
+ url_fseek(s->pb, base + 4 + 32, SEEK_SET);
+ v = get_be32(s->pb);
+ if(v == MKBETAG('V', 'B', 'R', 'I')) {
+ /* Check tag version */
+ if(get_be16(s->pb) == 1) {
+ /* skip delay, quality and total bytes */
+ url_fseek(s->pb, 8, SEEK_CUR);
+ frames = get_be32(s->pb);
+ }
+ }
+
+ if(frames < 0)
+ return;
+
+ spf = c.lsf ? 576 : 1152; /* Samples per frame, layer 3 */
+ st->duration = av_rescale_q(frames, (AVRational){spf, c.sample_rate},
+ st->time_base);
+}
+
static int mp3_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
AVStream *st;
uint8_t buf[ID3v1_TAG_SIZE];
int len, ret, filesize;
+ offset_t off;
st = av_new_stream(s, 0);
if (!st)
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
st->codec->codec_type = CODEC_TYPE_AUDIO;
st->codec->codec_id = CODEC_ID_MP3;
st->need_parsing = AVSTREAM_PARSE_FULL;
+ st->start_time = 0;
/* try to get the TAG */
- if (!url_is_streamed(&s->pb)) {
+ if (!url_is_streamed(s->pb)) {
/* XXX: change that */
- filesize = url_fsize(&s->pb);
+ filesize = url_fsize(s->pb);
if (filesize > 128) {
- url_fseek(&s->pb, filesize - 128, SEEK_SET);
- ret = get_buffer(&s->pb, buf, ID3v1_TAG_SIZE);
+ url_fseek(s->pb, filesize - 128, SEEK_SET);
+ ret = get_buffer(s->pb, buf, ID3v1_TAG_SIZE);
if (ret == ID3v1_TAG_SIZE) {
id3v1_parse_tag(s, buf);
}
- url_fseek(&s->pb, 0, SEEK_SET);
+ url_fseek(s->pb, 0, SEEK_SET);
}
}
/* if ID3v2 header found, skip it */
- ret = get_buffer(&s->pb, buf, ID3v2_HEADER_SIZE);
+ ret = get_buffer(s->pb, buf, ID3v2_HEADER_SIZE);
if (ret != ID3v2_HEADER_SIZE)
return -1;
if (id3v2_match(buf)) {
(buf[9] & 0x7f);
id3v2_parse(s, len, buf[3], buf[5]);
} else {
- url_fseek(&s->pb, 0, SEEK_SET);
+ url_fseek(s->pb, 0, SEEK_SET);
}
+ off = url_ftell(s->pb);
+ mp3_parse_vbr_tags(s, st, off);
+ url_fseek(s->pb, off, SEEK_SET);
+
/* the parameters will be extracted from the compressed bitstream */
return 0;
}
size= MP3_PACKET_SIZE;
- ret= av_get_packet(&s->pb, pkt, size);
+ ret= av_get_packet(s->pb, pkt, size);
pkt->stream_index = 0;
if (ret <= 0) {
- return AVERROR_IO;
+ return AVERROR(EIO);
}
/* note: we need to modify the packet size here to handle the last
packet */
static void id3v2_put_size(AVFormatContext *s, int size)
{
- put_byte(&s->pb, size >> 21 & 0x7f);
- put_byte(&s->pb, size >> 14 & 0x7f);
- put_byte(&s->pb, size >> 7 & 0x7f);
- put_byte(&s->pb, size & 0x7f);
+ put_byte(s->pb, size >> 21 & 0x7f);
+ put_byte(s->pb, size >> 14 & 0x7f);
+ put_byte(s->pb, size >> 7 & 0x7f);
+ put_byte(s->pb, size & 0x7f);
}
-static void id3v2_put_ttag(AVFormatContext *s, char *string, uint32_t tag)
+static void id3v2_put_ttag(AVFormatContext *s, const char *string, uint32_t tag)
{
int len = strlen(string);
- put_be32(&s->pb, tag);
+ put_be32(s->pb, tag);
id3v2_put_size(s, len + 1);
- put_be16(&s->pb, 0);
- put_byte(&s->pb, 3); /* UTF-8 */
- put_buffer(&s->pb, string, len);
+ put_be16(s->pb, 0);
+ put_byte(s->pb, 3); /* UTF-8 */
+ put_buffer(s->pb, string, len);
}
{
int totlen = 0;
char tracktxt[10];
+ char yeartxt[10];
if(s->track)
- snprintf(tracktxt, sizeof(tracktxt) - 1, "%d", s->track);
+ snprintf(tracktxt, sizeof(tracktxt), "%d", s->track);
+ if(s->year)
+ snprintf( yeartxt, sizeof(yeartxt) , "%d", s->year );
if(s->title[0]) totlen += 11 + strlen(s->title);
if(s->author[0]) totlen += 11 + strlen(s->author);
if(s->genre[0]) totlen += 11 + strlen(s->genre);
if(s->copyright[0]) totlen += 11 + strlen(s->copyright);
if(s->track) totlen += 11 + strlen(tracktxt);
+ if(s->year) totlen += 11 + strlen(yeartxt);
if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
totlen += strlen(LIBAVFORMAT_IDENT) + 11;
if(totlen == 0)
return 0;
- put_be32(&s->pb, MKBETAG('I', 'D', '3', 0x04)); /* ID3v2.4 */
- put_byte(&s->pb, 0);
- put_byte(&s->pb, 0); /* flags */
+ put_be32(s->pb, MKBETAG('I', 'D', '3', 0x04)); /* ID3v2.4 */
+ put_byte(s->pb, 0);
+ put_byte(s->pb, 0); /* flags */
id3v2_put_size(s, totlen);
if(s->genre[0]) id3v2_put_ttag(s, s->genre, MKBETAG('T', 'C', 'O', 'N'));
if(s->copyright[0]) id3v2_put_ttag(s, s->copyright, MKBETAG('T', 'C', 'O', 'P'));
if(s->track) id3v2_put_ttag(s, tracktxt, MKBETAG('T', 'R', 'C', 'K'));
+ if(s->year) id3v2_put_ttag(s, yeartxt, MKBETAG('T', 'Y', 'E', 'R'));
if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
id3v2_put_ttag(s, LIBAVFORMAT_IDENT, MKBETAG('T', 'E', 'N', 'C'));
return 0;
static int mp3_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
- put_buffer(&s->pb, pkt->data, pkt->size);
- put_flush_packet(&s->pb);
+ put_buffer(s->pb, pkt->data, pkt->size);
+ put_flush_packet(s->pb);
return 0;
}
/* write the id3v1 tag */
if (s->title[0] != '\0') {
id3v1_create_tag(s, buf);
- put_buffer(&s->pb, buf, ID3v1_TAG_SIZE);
- put_flush_packet(&s->pb);
+ put_buffer(s->pb, buf, ID3v1_TAG_SIZE);
+ put_flush_packet(s->pb);
}
return 0;
}
0,
CODEC_ID_MP2,
0,
- mp3_write_header,
+ NULL,
mp3_write_packet,
mp3_write_trailer,
};
projects / ffmpeg / blobdiff