**/
#include <stdlib.h>
+#include "libavutil/avstring.h"
+#include "libavutil/bswap.h"
+#include "libavcodec/get_bits.h"
+#include "libavcodec/bytestream.h"
#include "avformat.h"
-#include "bitstream.h"
-#include "bswap.h"
-#include "ogg2.h"
+#include "oggdec.h"
-extern int
-vorbis_comment (AVFormatContext * as, char *buf, int size)
+/**
+ * VorbisComment metadata conversion mapping.
+ * from Ogg Vorbis I format specification: comment field and header specification
+ * http://xiph.org/vorbis/doc/v-comment.html
+ */
+const AVMetadataConv ff_vorbiscomment_metadata_conv[] = {
+ { "ARTIST" , "author" },
+ { "DATE" , "year" },
+ { "TRACKNUMBER", "track" },
+ { 0 }
+};
+
+int
+vorbis_comment(AVFormatContext * as, uint8_t *buf, int size)
{
- char *p = buf;
- int s, n, j;
+ const uint8_t *p = buf;
+ const uint8_t *end = buf + size;
+ unsigned n, j;
+ int s;
- if (size < 4)
+ if (size < 8) /* must have vendor_length and user_comment_list_length */
return -1;
- s = le2me_32 (unaligned32 (p));
- p += 4;
- size -= 4;
+ s = bytestream_get_le32(&p);
- if (size < s + 4)
+ if (end - p - 4 < s || s < 0)
return -1;
p += s;
- size -= s;
- n = le2me_32 (unaligned32 (p));
- p += 4;
- size -= 4;
+ n = bytestream_get_le32(&p);
- while (size >= 4){
- char *t, *v;
+ while (end - p >= 4 && n > 0) {
+ const char *t, *v;
int tl, vl;
- s = le2me_32 (unaligned32 (p));
- p += 4;
- size -= 4;
+ s = bytestream_get_le32(&p);
- if (size < s)
+ if (end - p < s || s < 0)
break;
t = p;
p += s;
- size -= s;
n--;
- v = memchr (t, '=', s);
+ v = memchr(t, '=', s);
if (!v)
continue;
vl = s - tl - 1;
v++;
- if (tl && vl){
- char tt[tl + 1];
- char ct[vl + 1];
+ if (tl && vl) {
+ char *tt, *ct;
+
+ tt = av_malloc(tl + 1);
+ ct = av_malloc(vl + 1);
+ if (!tt || !ct) {
+ av_freep(&tt);
+ av_freep(&ct);
+ av_log(as, AV_LOG_WARNING, "out-of-memory error. skipping VorbisComment tag.\n");
+ continue;
+ }
for (j = 0; j < tl; j++)
- tt[j] = toupper (t[j]);
+ tt[j] = toupper(t[j]);
tt[tl] = 0;
- memcpy (ct, v, vl);
+ memcpy(ct, v, vl);
ct[vl] = 0;
- // took from Vorbis_I_spec
- if (!strcmp (tt, "AUTHOR"))
- strncpy (as->author, ct, FFMIN(sizeof (as->author), vl));
- else if (!strcmp (tt, "TITLE"))
- strncpy (as->title, ct, FFMIN(sizeof (as->title), vl));
- else if (!strcmp (tt, "COPYRIGHT"))
- strncpy (as->copyright, ct, FFMIN(sizeof (as->copyright), vl));
- else if (!strcmp (tt, "DESCRIPTION"))
- strncpy (as->comment, ct, FFMIN(sizeof (as->comment), vl));
- else if (!strcmp (tt, "GENRE"))
- strncpy (as->genre, ct, FFMIN(sizeof (as->genre), vl));
- else if (!strcmp (tt, "TRACKNUMBER"))
- as->track = atoi (ct);
- //Too bored to add others for today
+ av_metadata_set2(&as->metadata, tt, ct,
+ AV_METADATA_DONT_STRDUP_KEY |
+ AV_METADATA_DONT_STRDUP_VAL);
}
}
- if (size > 0)
- av_log (as, AV_LOG_INFO, "%i bytes of comment header remain\n", size);
+ if (p != end)
+ av_log(as, AV_LOG_INFO, "%ti bytes of comment header remain\n", end-p);
if (n > 0)
- av_log (as, AV_LOG_INFO,
- "truncated comment header, %i comments not found\n", n);
+ av_log(as, AV_LOG_INFO,
+ "truncated comment header, %i comments not found\n", n);
return 0;
}
* Vorbis Identification header from Vorbis_I_spec.html#vorbis-spec-codec
* [vorbis_version] = read 32 bits as unsigned integer | Not used
* [audio_channels] = read 8 bit integer as unsigned | Used
- * [audio_sample_rate] = read 32 bits as unsigned integer | Used
+ * [audio_sample_rate] = read 32 bits as unsigned integer | Used
* [bitrate_maximum] = read 32 bits as signed integer | Not used yet
* [bitrate_nominal] = read 32 bits as signed integer | Not used yet
* [bitrate_minimum] = read 32 bits as signed integer | Used as bitrate
* [framing_flag] = read one bit | Not Used
* */
+struct oggvorbis_private {
+ unsigned int len[3];
+ unsigned char *packet[3];
+};
+
+
+static unsigned int
+fixup_vorbis_headers(AVFormatContext * as, struct oggvorbis_private *priv,
+ uint8_t **buf)
+{
+ int i,offset, len;
+ unsigned char *ptr;
+
+ len = priv->len[0] + priv->len[1] + priv->len[2];
+ ptr = *buf = av_mallocz(len + len/255 + 64);
+
+ ptr[0] = 2;
+ offset = 1;
+ offset += av_xiphlacing(&ptr[offset], priv->len[0]);
+ offset += av_xiphlacing(&ptr[offset], priv->len[1]);
+ for (i = 0; i < 3; i++) {
+ memcpy(&ptr[offset], priv->packet[i], priv->len[i]);
+ offset += priv->len[i];
+ }
+ *buf = av_realloc(*buf, offset + FF_INPUT_BUFFER_PADDING_SIZE);
+ return offset;
+}
+
+
static int
vorbis_header (AVFormatContext * s, int idx)
{
- ogg_t *ogg = s->priv_data;
- ogg_stream_t *os = ogg->streams + idx;
+ struct ogg *ogg = s->priv_data;
+ struct ogg_stream *os = ogg->streams + idx;
AVStream *st = s->streams[idx];
- int cds = st->codec.extradata_size + os->psize + 2;
- u_char *cdp;
+ struct oggvorbis_private *priv;
if (os->seq > 2)
return 0;
- st->codec.extradata = av_realloc (st->codec.extradata, cds);
- cdp = st->codec.extradata + st->codec.extradata_size;
- *cdp++ = os->psize >> 8;
- *cdp++ = os->psize & 0xff;
- memcpy (cdp, os->buf + os->pstart, os->psize);
- st->codec.extradata_size = cds;
+ if (os->seq == 0) {
+ os->private = av_mallocz(sizeof(struct oggvorbis_private));
+ if (!os->private)
+ return 0;
+ }
+ if (os->psize < 1)
+ return -1;
+
+ priv = os->private;
+ priv->len[os->seq] = os->psize;
+ priv->packet[os->seq] = av_mallocz(os->psize);
+ memcpy(priv->packet[os->seq], os->buf + os->pstart, os->psize);
if (os->buf[os->pstart] == 1) {
- u_char *p = os->buf + os->pstart + 11; //skip up to the audio channels
- st->codec.channels = *p++;
- st->codec.sample_rate = le2me_32 (unaligned32 (p));
- p += 8; //skip maximum and and nominal bitrate
- st->codec.bit_rate = le2me_32 (unaligned32 (p)); //Minimum bitrate
+ const uint8_t *p = os->buf + os->pstart + 7; /* skip "\001vorbis" tag */
+ unsigned blocksize, bs0, bs1;
+
+ if (os->psize != 30)
+ return -1;
+
+ if (bytestream_get_le32(&p) != 0) /* vorbis_version */
+ return -1;
+
+ st->codec->channels = bytestream_get_byte(&p);
+ st->codec->sample_rate = bytestream_get_le32(&p);
+ p += 4; // skip maximum bitrate
+ st->codec->bit_rate = bytestream_get_le32(&p); // nominal bitrate
+ p += 4; // skip minimum bitrate
+
+ blocksize = bytestream_get_byte(&p);
+ bs0 = blocksize & 15;
+ bs1 = blocksize >> 4;
+
+ if (bs0 > bs1)
+ return -1;
+ if (bs0 < 6 || bs1 > 13)
+ return -1;
+
+ if (bytestream_get_byte(&p) != 1) /* framing_flag */
+ return -1;
- st->codec.codec_type = CODEC_TYPE_AUDIO;
- st->codec.codec_id = CODEC_ID_VORBIS;
+ st->codec->codec_type = CODEC_TYPE_AUDIO;
+ st->codec->codec_id = CODEC_ID_VORBIS;
+ st->time_base.num = 1;
+ st->time_base.den = st->codec->sample_rate;
} else if (os->buf[os->pstart] == 3) {
- vorbis_comment (s, os->buf + os->pstart + 7, os->psize - 8);
+ if (os->psize > 8)
+ vorbis_comment (s, os->buf + os->pstart + 7, os->psize - 8);
+ } else {
+ st->codec->extradata_size =
+ fixup_vorbis_headers(s, priv, &st->codec->extradata);
}
return os->seq < 3;
}
-ogg_codec_t vorbis_codec = {
+const struct ogg_codec ff_vorbis_codec = {
.magic = "\001vorbis",
.magicsize = 7,
.header = vorbis_header
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