* AU muxer and demuxer
* Copyright (c) 2001 Fabrice Bellard
*
+ * first version by Francois Revol <revol@free.fr>
+ *
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
*/
/*
- * 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 "avio_internal.h"
#include "pcm.h"
-/* The libavcodec codecs we support, and the IDs they have in the file */
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 },
+ { 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 },
};
#if CONFIG_AU_DEMUXER
static int au_probe(AVProbeData *p)
{
- /* check file header */
if (p->buf[0] == '.' && p->buf[1] == 's' &&
p->buf[2] == 'n' && p->buf[3] == 'd')
return AVPROBE_SCORE_MAX;
return 0;
}
-/* au input */
+#define BLOCK_SIZE 1024
+
static int au_read_header(AVFormatContext *s)
{
int size;
unsigned int tag;
AVIOContext *pb = s->pb;
unsigned int id, channels, rate;
+ int bps;
enum AVCodecID codec;
AVStream *st;
- /* check ".snd" header */
tag = avio_rl32(pb);
if (tag != MKTAG('.', 's', 'n', 'd'))
- return -1;
+ return AVERROR_INVALIDDATA;
size = avio_rb32(pb); /* header size */
- avio_rb32(pb); /* data size */
+ avio_rb32(pb); /* data size */
- id = avio_rb32(pb);
- rate = avio_rb32(pb);
+ id = avio_rb32(pb);
+ rate = avio_rb32(pb);
channels = avio_rb32(pb);
+ if (size > 24) {
+ /* skip unused data */
+ avio_skip(pb, size - 24);
+ }
+
codec = ff_codec_get_id(codec_au_tags, id);
- if (!av_get_bits_per_sample(codec)) {
- av_log_ask_for_sample(s, "could not determine bits per sample\n");
- return AVERROR_INVALIDDATA;
+ 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 > 64) {
- av_log(s, AV_LOG_ERROR, "Invalid number of channels %d\n", channels);
+ 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;
}
- if (size >= 24) {
- /* skip unused data */
- avio_skip(pb, size - 24);
+ if (rate == 0 || rate > INT_MAX) {
+ av_log(s, AV_LOG_ERROR, "Invalid sample rate: %u\n", rate);
+ return AVERROR_INVALIDDATA;
}
- /* now we are ready: build format streams */
st = avformat_new_stream(s, NULL);
if (!st)
- return -1;
- 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;
+ return AVERROR(ENOMEM);
+ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
+ st->codecpar->codec_tag = id;
+ st->codecpar->codec_id = codec;
+ st->codecpar->channels = channels;
+ st->codecpar->sample_rate = rate;
+ st->codecpar->bit_rate = channels * rate * bps;
+ st->codecpar->block_align = channels * bps >> 3;
+
+ st->start_time = 0;
avpriv_set_pts_info(st, 64, 1, rate);
+
return 0;
}
-#define BLOCK_SIZE 1024
-
-static int au_read_packet(AVFormatContext *s,
- AVPacket *pkt)
+static int au_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret;
- ret= av_get_packet(s->pb, pkt, BLOCK_SIZE *
- s->streams[0]->codec->channels *
- av_get_bits_per_sample(s->streams[0]->codec->codec_id) >> 3);
+ ret = av_get_packet(s->pb, pkt, BLOCK_SIZE *
+ s->streams[0]->codecpar->block_align);
if (ret < 0)
return ret;
+
pkt->stream_index = 0;
+ pkt->duration = ret / s->streams[0]->codecpar->block_align;
- /* note: we need to modify the packet size here to handle the last
- packet */
- pkt->size = ret;
return 0;
}
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 },
+ .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)
+static int put_au_header(AVIOContext *pb, AVCodecParameters *par)
{
- if(!enc->codec_tag)
- return -1;
- ffio_wfourcc(pb, ".snd"); /* magic number */
- avio_wb32(pb, 24); /* header size */
- avio_wb32(pb, AU_UNKNOWN_SIZE); /* data size */
- avio_wb32(pb, (uint32_t)enc->codec_tag); /* codec ID */
- avio_wb32(pb, enc->sample_rate);
- avio_wb32(pb, (uint32_t)enc->channels);
+ if (!par->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, par->codec_tag); /* codec ID */
+ avio_wb32(pb, par->sample_rate);
+ avio_wb32(pb, par->channels);
+
return 0;
}
static int au_write_header(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
+ int ret;
s->priv_data = NULL;
- /* format header */
- if (put_au_header(pb, s->streams[0]->codec) < 0) {
- return -1;
- }
+ if ((ret = put_au_header(pb, s->streams[0]->codecpar)) < 0)
+ return ret;
avio_flush(pb);
return 0;
}
-static int au_write_packet(AVFormatContext *s, AVPacket *pkt)
-{
- AVIOContext *pb = s->pb;
- avio_write(pb, pkt->data, pkt->size);
- return 0;
-}
-
static int au_write_trailer(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
int64_t file_size;
- if (s->pb->seekable) {
-
+ if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
/* 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);
}
}
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 = au_write_packet,
- .write_trailer = au_write_trailer,
- .codec_tag = (const AVCodecTag* const []){ codec_au_tags, 0 },
+ .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