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Diffstat (limited to 'contrib/ffmpeg/libavformat/oggparsevorbis.c')
-rw-r--r--contrib/ffmpeg/libavformat/oggparsevorbis.c226
1 files changed, 0 insertions, 226 deletions
diff --git a/contrib/ffmpeg/libavformat/oggparsevorbis.c b/contrib/ffmpeg/libavformat/oggparsevorbis.c
deleted file mode 100644
index cc914ce39..000000000
--- a/contrib/ffmpeg/libavformat/oggparsevorbis.c
+++ /dev/null
@@ -1,226 +0,0 @@
-/**
- Copyright (C) 2005 Michael Ahlberg, Måns Rullgård
-
- Permission is hereby granted, free of charge, to any person
- obtaining a copy of this software and associated documentation
- files (the "Software"), to deal in the Software without
- restriction, including without limitation the rights to use, copy,
- modify, merge, publish, distribute, sublicense, and/or sell copies
- of the Software, and to permit persons to whom the Software is
- furnished to do so, subject to the following conditions:
-
- The above copyright notice and this permission notice shall be
- included in all copies or substantial portions of the Software.
-
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- DEALINGS IN THE SOFTWARE.
-**/
-
-#include <stdlib.h>
-#include "avformat.h"
-#include "bitstream.h"
-#include "bytestream.h"
-#include "bswap.h"
-#include "oggdec.h"
-#include "avstring.h"
-
-extern int
-vorbis_comment(AVFormatContext * as, uint8_t *buf, int size)
-{
- const uint8_t *p = buf;
- const uint8_t *end = buf + size;
- unsigned s, n, j;
-
- if (size < 8) /* must have vendor_length and user_comment_list_length */
- return -1;
-
- s = bytestream_get_le32(&p);
-
- if (end - p < s)
- return -1;
-
- p += s;
-
- n = bytestream_get_le32(&p);
-
- while (p < end && n > 0) {
- const char *t, *v;
- int tl, vl;
-
- s = bytestream_get_le32(&p);
-
- if (end - p < s)
- break;
-
- t = p;
- p += s;
- n--;
-
- v = memchr(t, '=', s);
- if (!v)
- continue;
-
- tl = v - t;
- vl = s - tl - 1;
- v++;
-
- if (tl && vl) {
- char tt[tl + 1];
- char ct[vl + 1];
-
- for (j = 0; j < tl; j++)
- tt[j] = toupper(t[j]);
- tt[tl] = 0;
-
- memcpy(ct, v, vl);
- ct[vl] = 0;
-
- // took from Vorbis_I_spec
- if (!strcmp(tt, "AUTHOR") || !strcmp(tt, "ARTIST"))
- av_strlcpy(as->author, ct, sizeof(as->author));
- else if (!strcmp(tt, "TITLE"))
- av_strlcpy(as->title, ct, sizeof(as->title));
- else if (!strcmp(tt, "COPYRIGHT"))
- av_strlcpy(as->copyright, ct, sizeof(as->copyright));
- else if (!strcmp(tt, "DESCRIPTION"))
- av_strlcpy(as->comment, ct, sizeof(as->comment));
- else if (!strcmp(tt, "GENRE"))
- av_strlcpy(as->genre, ct, sizeof(as->genre));
- else if (!strcmp(tt, "TRACKNUMBER"))
- as->track = atoi(ct);
- else if (!strcmp(tt, "ALBUM"))
- av_strlcpy(as->album, ct, sizeof(as->album));
- }
- }
-
- if (p != end)
- av_log(as, AV_LOG_INFO, "%ti bytes of comment header remain\n", p-end);
- if (n > 0)
- av_log(as, AV_LOG_INFO,
- "truncated comment header, %i comments not found\n", n);
-
- return 0;
-}
-
-
-/** Parse the vorbis header
- * 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
- * [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
- * [blocksize_0] = read 4 bits as unsigned integer | Not Used
- * [blocksize_1] = read 4 bits as unsigned integer | Not Used
- * [framing_flag] = read one bit | Not Used
- * */
-
-typedef struct {
- unsigned int len[3];
- unsigned char *packet[3];
-} oggvorbis_private_t;
-
-
-static unsigned int
-fixup_vorbis_headers(AVFormatContext * as, oggvorbis_private_t *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);
- return offset;
-}
-
-
-static int
-vorbis_header (AVFormatContext * s, int idx)
-{
- ogg_t *ogg = s->priv_data;
- ogg_stream_t *os = ogg->streams + idx;
- AVStream *st = s->streams[idx];
- oggvorbis_private_t *priv;
-
- if (os->seq > 2)
- return 0;
-
- if (os->seq == 0) {
- os->private = av_mallocz(sizeof(oggvorbis_private_t));
- 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) {
- 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->time_base.num = 1;
- st->time_base.den = st->codec->sample_rate;
- } else if (os->buf[os->pstart] == 3) {
- 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 = {
- .magic = "\001vorbis",
- .magicsize = 7,
- .header = vorbis_header
-};
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-01 18:04:25 +0000