-/*
- * AU encoder and decoder
- * Copyright (c) 2001 Fabrice Bellard.
+/*
+ * AU muxer and demuxer
+ * Copyright (c) 2001 Fabrice Bellard
+ *
+ * first version by Francois Revol <revol@free.fr>
+ *
+ * This file is part of Libav.
*
- * This library 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
- * First version by Francois Revol revol@free.fr
- *
* Reference documents:
* http://www.opengroup.org/public/pubs/external/auformat.html
* http://www.goice.co.jp/member/mo/formats/au.html
*/
#include "avformat.h"
-#include "avi.h"
-
-/* if we don't know the size in advance */
-#define AU_UNKOWN_SIZE ((uint32_t)(~0))
-
-/* The ffmpeg codecs we support, and the IDs they have in the file */
-static const CodecTag codec_au_tags[] = {
- { CODEC_ID_PCM_MULAW, 1 },
- { CODEC_ID_PCM_S16BE, 3 },
- { CODEC_ID_PCM_ALAW, 27 },
- { 0, 0 },
+#include "internal.h"
+#include "avio_internal.h"
+#include "pcm.h"
+
+static const AVCodecTag codec_au_tags[] = {
+ { AV_CODEC_ID_PCM_MULAW, 1 },
+ { AV_CODEC_ID_PCM_S8, 2 },
+ { AV_CODEC_ID_PCM_S16BE, 3 },
+ { AV_CODEC_ID_PCM_S24BE, 4 },
+ { AV_CODEC_ID_PCM_S32BE, 5 },
+ { AV_CODEC_ID_PCM_F32BE, 6 },
+ { AV_CODEC_ID_PCM_F64BE, 7 },
+ { AV_CODEC_ID_PCM_ALAW, 27 },
+ { AV_CODEC_ID_NONE, 0 },
};
-#ifdef CONFIG_MUXERS
-/* AUDIO_FILE header */
-static int put_au_header(ByteIOContext *pb, AVCodecContext *enc)
-{
- if(!enc->codec_tag)
- enc->codec_tag = codec_get_tag(codec_au_tags, enc->codec_id);
- if(!enc->codec_tag)
- return -1;
- put_tag(pb, ".snd"); /* magic number */
- put_be32(pb, 24); /* header size */
- put_be32(pb, AU_UNKOWN_SIZE); /* data size */
- put_be32(pb, (uint32_t)enc->codec_tag); /* codec ID */
- put_be32(pb, enc->sample_rate);
- put_be32(pb, (uint32_t)enc->channels);
- return 0;
-}
-
-static int au_write_header(AVFormatContext *s)
-{
- ByteIOContext *pb = &s->pb;
-
- s->priv_data = NULL;
-
- /* format header */
- if (put_au_header(pb, s->streams[0]->codec) < 0) {
- return -1;
- }
-
- put_flush_packet(pb);
-
- return 0;
-}
-
-static int au_write_packet(AVFormatContext *s, AVPacket *pkt)
-{
- ByteIOContext *pb = &s->pb;
- put_buffer(pb, pkt->data, pkt->size);
- return 0;
-}
-
-static int au_write_trailer(AVFormatContext *s)
-{
- ByteIOContext *pb = &s->pb;
- offset_t file_size;
-
- if (!url_is_streamed(&s->pb)) {
-
- /* update file size */
- file_size = url_ftell(pb);
- url_fseek(pb, 8, SEEK_SET);
- put_be32(pb, (uint32_t)(file_size - 24));
- url_fseek(pb, file_size, SEEK_SET);
-
- put_flush_packet(pb);
- }
-
- return 0;
-}
-#endif //CONFIG_MUXERS
+#if CONFIG_AU_DEMUXER
static int au_probe(AVProbeData *p)
{
- /* check file header */
- if (p->buf_size <= 24)
- return 0;
if (p->buf[0] == '.' && p->buf[1] == 's' &&
p->buf[2] == 'n' && p->buf[3] == 'd')
return AVPROBE_SCORE_MAX;
return 0;
}
-/* au input */
-static int au_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
+#define BLOCK_SIZE 1024
+
+static int au_read_header(AVFormatContext *s)
{
int size;
unsigned int tag;
- ByteIOContext *pb = &s->pb;
- unsigned int id, codec, channels, rate;
+ AVIOContext *pb = s->pb;
+ unsigned int id, channels, rate;
+ int bps;
+ enum AVCodecID codec;
AVStream *st;
- /* check ".snd" header */
- tag = get_le32(pb);
+ tag = avio_rl32(pb);
if (tag != MKTAG('.', 's', 'n', 'd'))
- return -1;
- size = get_be32(pb); /* header size */
- get_be32(pb); /* data size */
-
- id = get_be32(pb);
- rate = get_be32(pb);
- channels = get_be32(pb);
-
- codec = codec_get_id(codec_au_tags, id);
-
- if (size >= 24) {
+ return AVERROR_INVALIDDATA;
+ size = avio_rb32(pb); /* header size */
+ avio_rb32(pb); /* data size */
+
+ id = avio_rb32(pb);
+ rate = avio_rb32(pb);
+ channels = avio_rb32(pb);
+
+ if (size > 24) {
/* skip unused data */
- url_fseek(pb, size - 24, SEEK_CUR);
+ avio_skip(pb, size - 24);
+ }
+
+ codec = ff_codec_get_id(codec_au_tags, id);
+
+ if (codec == AV_CODEC_ID_NONE) {
+ avpriv_request_sample(s, "unknown or unsupported codec tag: %u", id);
+ return AVERROR_PATCHWELCOME;
+ }
+
+ bps = av_get_bits_per_sample(codec);
+ if (!bps) {
+ avpriv_request_sample(s, "Unknown bits per sample");
+ return AVERROR_PATCHWELCOME;
+ }
+
+ if (channels == 0 || channels >= INT_MAX / (BLOCK_SIZE * bps >> 3)) {
+ av_log(s, AV_LOG_ERROR, "Invalid number of channels %u\n", channels);
+ return AVERROR_INVALIDDATA;
}
- /* now we are ready: build format streams */
- st = av_new_stream(s, 0);
+ if (rate == 0 || rate > INT_MAX) {
+ av_log(s, AV_LOG_ERROR, "Invalid sample rate: %u\n", rate);
+ return AVERROR_INVALIDDATA;
+ }
+
+ st = avformat_new_stream(s, NULL);
if (!st)
- return -1;
- st->codec->codec_type = CODEC_TYPE_AUDIO;
- st->codec->codec_tag = id;
- st->codec->codec_id = codec;
- st->codec->channels = channels;
+ return AVERROR(ENOMEM);
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codec->codec_tag = id;
+ st->codec->codec_id = codec;
+ st->codec->channels = channels;
st->codec->sample_rate = rate;
- av_set_pts_info(st, 64, 1, rate);
+ st->codec->bit_rate = channels * rate * bps;
+ st->codec->block_align = channels * bps >> 3;
+
+ st->start_time = 0;
+ avpriv_set_pts_info(st, 64, 1, rate);
+
return 0;
}
-#define MAX_SIZE 4096
-
-static int au_read_packet(AVFormatContext *s,
- AVPacket *pkt)
+static int au_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret;
- if (url_feof(&s->pb))
- return AVERROR_IO;
- ret= av_get_packet(&s->pb, pkt, MAX_SIZE);
+ ret = av_get_packet(s->pb, pkt, BLOCK_SIZE *
+ s->streams[0]->codec->block_align);
if (ret < 0)
- return AVERROR_IO;
+ return ret;
+
pkt->stream_index = 0;
+ pkt->duration = ret / s->streams[0]->codec->block_align;
- /* note: we need to modify the packet size here to handle the last
- packet */
- pkt->size = ret;
return 0;
}
-static int au_read_close(AVFormatContext *s)
+AVInputFormat ff_au_demuxer = {
+ .name = "au",
+ .long_name = NULL_IF_CONFIG_SMALL("Sun AU"),
+ .read_probe = au_probe,
+ .read_header = au_read_header,
+ .read_packet = au_read_packet,
+ .read_seek = ff_pcm_read_seek,
+ .codec_tag = (const AVCodecTag* const []) { codec_au_tags, 0 },
+};
+
+#endif /* CONFIG_AU_DEMUXER */
+
+#if CONFIG_AU_MUXER
+
+#include "rawenc.h"
+
+/* if we don't know the size in advance */
+#define AU_UNKNOWN_SIZE ((uint32_t)(~0))
+
+/* AUDIO_FILE header */
+static int put_au_header(AVIOContext *pb, AVCodecContext *enc)
{
+ if (!enc->codec_tag)
+ return AVERROR(EINVAL);
+
+ ffio_wfourcc(pb, ".snd"); /* magic number */
+ avio_wb32(pb, 24); /* header size */
+ avio_wb32(pb, AU_UNKNOWN_SIZE); /* data size */
+ avio_wb32(pb, enc->codec_tag); /* codec ID */
+ avio_wb32(pb, enc->sample_rate);
+ avio_wb32(pb, enc->channels);
+
return 0;
}
-static AVInputFormat au_iformat = {
- "au",
- "SUN AU Format",
- 0,
- au_probe,
- au_read_header,
- au_read_packet,
- au_read_close,
- pcm_read_seek,
-};
+static int au_write_header(AVFormatContext *s)
+{
+ AVIOContext *pb = s->pb;
+ int ret;
-#ifdef CONFIG_MUXERS
-static AVOutputFormat au_oformat = {
- "au",
- "SUN AU Format",
- "audio/basic",
- "au",
- 0,
- CODEC_ID_PCM_S16BE,
- CODEC_ID_NONE,
- au_write_header,
- au_write_packet,
- au_write_trailer,
-};
-#endif //CONFIG_MUXERS
+ s->priv_data = NULL;
+
+ if ((ret = put_au_header(pb, s->streams[0]->codec)) < 0)
+ return ret;
+
+ avio_flush(pb);
+
+ return 0;
+}
-int au_init(void)
+static int au_write_trailer(AVFormatContext *s)
{
- av_register_input_format(&au_iformat);
-#ifdef CONFIG_MUXERS
- av_register_output_format(&au_oformat);
-#endif //CONFIG_MUXERS
+ AVIOContext *pb = s->pb;
+ int64_t file_size;
+
+ if (s->pb->seekable) {
+ /* update file size */
+ file_size = avio_tell(pb);
+ avio_seek(pb, 8, SEEK_SET);
+ avio_wb32(pb, (uint32_t)(file_size - 24));
+ avio_seek(pb, file_size, SEEK_SET);
+ avio_flush(pb);
+ }
+
return 0;
}
+
+AVOutputFormat ff_au_muxer = {
+ .name = "au",
+ .long_name = NULL_IF_CONFIG_SMALL("Sun AU"),
+ .mime_type = "audio/basic",
+ .extensions = "au",
+ .audio_codec = AV_CODEC_ID_PCM_S16BE,
+ .video_codec = AV_CODEC_ID_NONE,
+ .write_header = au_write_header,
+ .write_packet = ff_raw_write_packet,
+ .write_trailer = au_write_trailer,
+ .codec_tag = (const AVCodecTag* const []) { codec_au_tags, 0 },
+ .flags = AVFMT_NOTIMESTAMPS,
+};
+
+#endif /* CONFIG_AU_MUXER */
projects / ffmpeg / blobdiff