* Creative Voice File demuxer.
* Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org>
*
- * 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 "libavutil/intreadwrite.h"
#include "voc.h"
-
+#include "internal.h"
static int voc_probe(AVProbeData *p)
{
int version, check;
- if (memcmp(p->buf, voc_magic, sizeof(voc_magic) - 1))
+ if (memcmp(p->buf, ff_voc_magic, sizeof(ff_voc_magic) - 1))
return 0;
version = AV_RL16(p->buf + 22);
check = AV_RL16(p->buf + 24);
return AVPROBE_SCORE_MAX;
}
-static int voc_read_header(AVFormatContext *s, AVFormatParameters *ap)
+static int voc_read_header(AVFormatContext *s)
{
- voc_dec_context_t *voc = s->priv_data;
- ByteIOContext *pb = &s->pb;
+ VocDecContext *voc = s->priv_data;
+ AVIOContext *pb = s->pb;
int header_size;
- AVStream *st;
- url_fskip(pb, 20);
- header_size = get_le16(pb) - 22;
+ avio_skip(pb, 20);
+ header_size = avio_rl16(pb) - 22;
if (header_size != 4) {
av_log(s, AV_LOG_ERROR, "unknown header size: %d\n", header_size);
return AVERROR(ENOSYS);
}
- url_fskip(pb, header_size);
- st = av_new_stream(s, 0);
- if (!st)
- return AVERROR(ENOMEM);
- st->codec->codec_type = CODEC_TYPE_AUDIO;
+ avio_skip(pb, header_size);
+
+ s->ctx_flags |= AVFMTCTX_NOHEADER;
voc->remaining_size = 0;
return 0;
}
-int
-voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
-{
- voc_dec_context_t *voc = s->priv_data;
- AVCodecContext *dec = st->codec;
- ByteIOContext *pb = &s->pb;
- voc_type_t type;
- int size;
- int sample_rate = 0;
- int channels = 1;
-
- while (!voc->remaining_size) {
- type = get_byte(pb);
- if (type == VOC_TYPE_EOF)
- return AVERROR(EIO);
- voc->remaining_size = get_le24(pb);
- max_size -= 4;
-
- switch (type) {
- case VOC_TYPE_VOICE_DATA:
- dec->sample_rate = 1000000 / (256 - get_byte(pb));
- if (sample_rate)
- dec->sample_rate = sample_rate;
- dec->channels = channels;
- dec->codec_id = codec_get_id(voc_codec_tags, get_byte(pb));
- dec->bits_per_sample = av_get_bits_per_sample(dec->codec_id);
- voc->remaining_size -= 2;
- max_size -= 2;
- channels = 1;
- break;
-
- case VOC_TYPE_VOICE_DATA_CONT:
- break;
-
- case VOC_TYPE_EXTENDED:
- sample_rate = get_le16(pb);
- get_byte(pb);
- channels = get_byte(pb) + 1;
- sample_rate = 256000000 / (channels * (65536 - sample_rate));
- voc->remaining_size = 0;
- max_size -= 4;
- break;
-
- case VOC_TYPE_NEW_VOICE_DATA:
- dec->sample_rate = get_le32(pb);
- dec->bits_per_sample = get_byte(pb);
- dec->channels = get_byte(pb);
- dec->codec_id = codec_get_id(voc_codec_tags, get_le16(pb));
- url_fskip(pb, 4);
- voc->remaining_size -= 12;
- max_size -= 12;
- break;
-
- default:
- url_fskip(pb, voc->remaining_size);
- max_size -= voc->remaining_size;
- voc->remaining_size = 0;
- break;
- }
- }
-
- dec->bit_rate = dec->sample_rate * dec->bits_per_sample;
-
- if (max_size <= 0)
- max_size = 2048;
- size = FFMIN(voc->remaining_size, max_size);
- voc->remaining_size -= size;
- return av_get_packet(pb, pkt, size);
-}
-
static int voc_read_packet(AVFormatContext *s, AVPacket *pkt)
{
- return voc_get_packet(s, pkt, s->streams[0], 0);
+ if (!s->nb_streams) {
+ AVStream *st = avformat_new_stream(s, NULL);
+ if (!st)
+ return AVERROR(ENOMEM);
+ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+ }
+ return ff_voc_get_packet(s, pkt, s->streams[0], 0);
}
-AVInputFormat voc_demuxer = {
- "voc",
- "Creative Voice File format",
- sizeof(voc_dec_context_t),
- voc_probe,
- voc_read_header,
- voc_read_packet,
- .codec_tag=(const AVCodecTag*[]){voc_codec_tags, 0},
+AVInputFormat ff_voc_demuxer = {
+ .name = "voc",
+ .long_name = NULL_IF_CONFIG_SMALL("Creative Voice"),
+ .priv_data_size = sizeof(VocDecContext),
+ .read_probe = voc_probe,
+ .read_header = voc_read_header,
+ .read_packet = voc_read_packet,
+ .codec_tag = (const AVCodecTag* const []){ ff_voc_codec_tags, 0 },
};
projects / ffmpeg / blobdiff