* Musepack SV8 demuxer
* Copyright (c) 2007 Konstantin Shishkov
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavcodec/get_bits.h"
#include "libavcodec/unary.h"
+#include "apetag.h"
#include "avformat.h"
+#include "internal.h"
+#include "avio_internal.h"
/// Two-byte MPC tag
#define MKMPCTAG(a, b) (a | (b << 8))
static void mpc8_get_chunk_header(AVIOContext *pb, int *tag, int64_t *size)
{
int64_t pos;
- pos = url_ftell(pb);
+ pos = avio_tell(pb);
*tag = avio_rl16(pb);
- *size = ff_get_v(pb);
- *size -= url_ftell(pb) - pos;
+ *size = ffio_read_varlen(pb);
+ *size -= avio_tell(pb) - pos;
}
static void mpc8_parse_seektable(AVFormatContext *s, int64_t off)
switch(tag){
case TAG_SEEKTBLOFF:
- pos = url_ftell(pb) + size;
- off = ff_get_v(pb);
+ pos = avio_tell(pb) + size;
+ off = ffio_read_varlen(pb);
mpc8_parse_seektable(s, chunk_pos + off);
avio_seek(pb, pos, SEEK_SET);
break;
default:
- avio_seek(pb, size, SEEK_CUR);
+ avio_skip(pb, size);
}
}
-static int mpc8_read_header(AVFormatContext *s, AVFormatParameters *ap)
+static int mpc8_read_header(AVFormatContext *s)
{
MPCContext *c = s->priv_data;
AVIOContext *pb = s->pb;
int tag = 0;
int64_t size, pos;
- c->header_pos = url_ftell(pb);
+ c->header_pos = avio_tell(pb);
if(avio_rl32(pb) != TAG_MPCK){
av_log(s, AV_LOG_ERROR, "Not a Musepack8 file\n");
return -1;
}
- while(!url_feof(pb)){
- pos = url_ftell(pb);
+ while(!pb->eof_reached){
+ pos = avio_tell(pb);
mpc8_get_chunk_header(pb, &tag, &size);
if(tag == TAG_STREAMHDR)
break;
av_log(s, AV_LOG_ERROR, "Stream header not found\n");
return -1;
}
- pos = url_ftell(pb);
- avio_seek(pb, 4, SEEK_CUR); //CRC
+ pos = avio_tell(pb);
+ avio_skip(pb, 4); //CRC
c->ver = avio_r8(pb);
if(c->ver != 8){
av_log(s, AV_LOG_ERROR, "Unknown stream version %d\n", c->ver);
return -1;
}
- c->samples = ff_get_v(pb);
- ff_get_v(pb); //silence samples at the beginning
+ c->samples = ffio_read_varlen(pb);
+ ffio_read_varlen(pb); //silence samples at the beginning
- st = av_new_stream(s, 0);
+ st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->channels = (st->codec->extradata[1] >> 4) + 1;
st->codec->sample_rate = mpc8_rate[st->codec->extradata[0] >> 5];
- av_set_pts_info(st, 32, 1152 << (st->codec->extradata[1]&3)*2, st->codec->sample_rate);
+ avpriv_set_pts_info(st, 32, 1152 << (st->codec->extradata[1]&3)*2, st->codec->sample_rate);
st->duration = c->samples / (1152 << (st->codec->extradata[1]&3)*2);
- size -= url_ftell(pb) - pos;
+ size -= avio_tell(pb) - pos;
+
+ if (pb->seekable) {
+ int64_t pos = avio_tell(s->pb);
+ ff_ape_parse_tag(s);
+ avio_seek(s->pb, pos, SEEK_SET);
+ }
return 0;
}
int tag;
int64_t pos, size;
- while(!url_feof(s->pb)){
- pos = url_ftell(s->pb);
+ while(!s->pb->eof_reached){
+ pos = avio_tell(s->pb);
mpc8_get_chunk_header(s->pb, &tag, &size);
if (size < 0)
return -1;
return AVERROR(EIO);
mpc8_handle_chunk(s, tag, pos, size);
}
- return 0;
+ return AVERROR_EOF;
}
static int mpc8_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
int index = av_index_search_timestamp(st, timestamp, flags);
if(index < 0) return -1;
- avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
+ if (avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET) < 0)
+ return -1;
c->frame = st->index_entries[index].timestamp;
return 0;
}
AVInputFormat ff_mpc8_demuxer = {
- "mpc8",
- NULL_IF_CONFIG_SMALL("Musepack SV8"),
- sizeof(MPCContext),
- mpc8_probe,
- mpc8_read_header,
- mpc8_read_packet,
- NULL,
- mpc8_read_seek,
+ .name = "mpc8",
+ .long_name = NULL_IF_CONFIG_SMALL("Musepack SV8"),
+ .priv_data_size = sizeof(MPCContext),
+ .read_probe = mpc8_probe,
+ .read_header = mpc8_read_header,
+ .read_packet = mpc8_read_packet,
+ .read_seek = mpc8_read_seek,
};
projects / ffmpeg / blobdiff