* CRYO APC audio format demuxer
* Copyright (c) 2007 Anssi Hannula <anssi.hannula@gmail.com>
*
- * 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 <string.h>
+
+#include "libavutil/channel_layout.h"
#include "avformat.h"
-#include "string.h"
static int apc_probe(AVProbeData *p)
{
- if (p->buf_size < 8)
- return 0;
-
if (!strncmp(p->buf, "CRYO_APC", 8))
return AVPROBE_SCORE_MAX;
return 0;
}
-static int apc_read_header(AVFormatContext *s, AVFormatParameters *ap)
+static int apc_read_header(AVFormatContext *s)
{
- ByteIOContext *pb = &s->pb;
+ AVIOContext *pb = s->pb;
AVStream *st;
- get_le32(pb); /* CRYO */
- get_le32(pb); /* _APC */
- get_le32(pb); /* 1.20 */
+ avio_rl32(pb); /* CRYO */
+ avio_rl32(pb); /* _APC */
+ avio_rl32(pb); /* 1.20 */
- st = av_new_stream(s, 0);
+ st = avformat_new_stream(s, NULL);
if (!st)
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
- st->codec->codec_type = CODEC_TYPE_AUDIO;
- st->codec->codec_id = CODEC_ID_ADPCM_IMA_WS;
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->codec_id = AV_CODEC_ID_ADPCM_IMA_APC;
- get_le32(pb); /* number of samples */
- st->codec->sample_rate = get_le32(pb);
+ avio_rl32(pb); /* number of samples */
+ st->codec->sample_rate = avio_rl32(pb);
st->codec->extradata_size = 2 * 4;
st->codec->extradata = av_malloc(st->codec->extradata_size +
FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata)
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
/* initial predictor values for adpcm decoder */
- get_buffer(pb, st->codec->extradata, 2 * 4);
-
- st->codec->channels = 1;
- if (get_le32(pb))
- st->codec->channels = 2;
-
- st->codec->bits_per_sample = 4;
- st->codec->bit_rate = st->codec->bits_per_sample * st->codec->channels
+ avio_read(pb, st->codec->extradata, 2 * 4);
+
+ if (avio_rl32(pb)) {
+ st->codec->channels = 2;
+ st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
+ } else {
+ st->codec->channels = 1;
+ st->codec->channel_layout = AV_CH_LAYOUT_MONO;
+ }
+
+ st->codec->bits_per_coded_sample = 4;
+ st->codec->bit_rate = st->codec->bits_per_coded_sample * st->codec->channels
* st->codec->sample_rate;
st->codec->block_align = 1;
static int apc_read_packet(AVFormatContext *s, AVPacket *pkt)
{
- if (av_get_packet(&s->pb, pkt, MAX_READ_SIZE) <= 0)
- return AVERROR_IO;
+ if (av_get_packet(s->pb, pkt, MAX_READ_SIZE) <= 0)
+ return AVERROR(EIO);
pkt->stream_index = 0;
return 0;
}
-AVInputFormat apc_demuxer = {
- "apc",
- "CRYO APC format",
- 0,
- apc_probe,
- apc_read_header,
- apc_read_packet,
+AVInputFormat ff_apc_demuxer = {
+ .name = "apc",
+ .long_name = NULL_IF_CONFIG_SMALL("CRYO APC"),
+ .read_probe = apc_probe,
+ .read_header = apc_read_header,
+ .read_packet = apc_read_packet,
};