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Implement SoX native format muxer and demuxer.
Patch by Daniel Verkamp $firstname@drv DOT nu. Originally committed as revision 18998 to svn://svn.ffmpeg.org/ffmpeg/trunk
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/* | ||
* SoX native format common data | ||
* Copyright (c) 2009 Daniel Verkamp <daniel@drv.nu> | ||
* | ||
* This file is part of FFmpeg. | ||
* | ||
* FFmpeg 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, | ||
* 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 | ||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
*/ | ||
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#ifndef AVFORMAT_SOX_H | ||
#define AVFORMAT_SOX_H | ||
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#define SOX_FIXED_HDR (4 + 8 + 8 + 4 + 4) /**< Size of fixed header without magic */ | ||
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#define SOX_TAG MKTAG('.', 'S', 'o', 'X') | ||
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#endif /* AVFORMAT_SOX_H */ |
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/* | ||
* SoX native format demuxer | ||
* Copyright (c) 2009 Daniel Verkamp <daniel@drv.nu> | ||
* | ||
* Based on libSoX sox-fmt.c | ||
* Copyright (c) 2008 robs@users.sourceforge.net | ||
* | ||
* This file is part of FFmpeg. | ||
* | ||
* FFmpeg 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, | ||
* 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 | ||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
*/ | ||
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/** | ||
* SoX native format demuxer | ||
* @file libavformat/soxdec.c | ||
* @author Daniel Verkamp | ||
* @sa http://wiki.multimedia.cx/index.php?title=SoX_native_intermediate_format | ||
*/ | ||
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#include "libavutil/intreadwrite.h" | ||
#include "avformat.h" | ||
#include "raw.h" | ||
#include "sox.h" | ||
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static int sox_probe(AVProbeData *p) | ||
{ | ||
if (AV_RL32(p->buf) == SOX_TAG || AV_RB32(p->buf) == SOX_TAG) | ||
return AVPROBE_SCORE_MAX; | ||
return 0; | ||
} | ||
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static int sox_read_header(AVFormatContext *s, | ||
AVFormatParameters *ap) | ||
{ | ||
ByteIOContext *pb = s->pb; | ||
unsigned header_size, comment_size; | ||
double sample_rate, sample_rate_frac; | ||
AVStream *st; | ||
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st = av_new_stream(s, 0); | ||
if (!st) | ||
return AVERROR(ENOMEM); | ||
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st->codec->codec_type = CODEC_TYPE_AUDIO; | ||
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if (get_le32(pb) == SOX_TAG) { | ||
st->codec->codec_id = CODEC_ID_PCM_S32LE; | ||
header_size = get_le32(pb); | ||
url_fskip(pb, 8); /* sample count */ | ||
sample_rate = av_int2dbl(get_le64(pb)); | ||
st->codec->channels = get_le32(pb); | ||
comment_size = get_le32(pb); | ||
} else { | ||
st->codec->codec_id = CODEC_ID_PCM_S32BE; | ||
header_size = get_be32(pb); | ||
url_fskip(pb, 8); /* sample count */ | ||
sample_rate = av_int2dbl(get_be64(pb)); | ||
st->codec->channels = get_be32(pb); | ||
comment_size = get_be32(pb); | ||
} | ||
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if (comment_size > 0xFFFFFFFFU - SOX_FIXED_HDR - 4U) { | ||
av_log(s, AV_LOG_ERROR, "invalid comment size (%u)\n", comment_size); | ||
return -1; | ||
} | ||
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if (sample_rate <= 0 || sample_rate > INT_MAX) { | ||
av_log(s, AV_LOG_ERROR, "invalid sample rate (%f)\n", sample_rate); | ||
return -1; | ||
} | ||
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sample_rate_frac = sample_rate - floor(sample_rate); | ||
if (sample_rate_frac) | ||
av_log(s, AV_LOG_WARNING, | ||
"truncating fractional part of sample rate (%f)\n", | ||
sample_rate_frac); | ||
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if ((header_size + 4) & 7 || header_size < SOX_FIXED_HDR + comment_size | ||
|| st->codec->channels > 65535) /* Reserve top 16 bits */ { | ||
av_log(s, AV_LOG_ERROR, "invalid header\n"); | ||
return -1; | ||
} | ||
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if (comment_size && | ||
comment_size + FF_INPUT_BUFFER_PADDING_SIZE >= comment_size) { | ||
char *comment = av_mallocz(comment_size + FF_INPUT_BUFFER_PADDING_SIZE); | ||
if (get_buffer(pb, comment, comment_size) != comment_size) { | ||
av_freep(&comment); | ||
return AVERROR_IO; | ||
} | ||
av_metadata_set(&s->metadata, "comment", comment); | ||
av_freep(&comment); | ||
} | ||
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url_fskip(pb, header_size - SOX_FIXED_HDR - comment_size); | ||
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st->codec->sample_rate = sample_rate; | ||
st->codec->sample_fmt = SAMPLE_FMT_S32; | ||
st->codec->bits_per_coded_sample = 32; | ||
st->codec->bit_rate = st->codec->sample_rate * | ||
st->codec->bits_per_coded_sample * | ||
st->codec->channels; | ||
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av_set_pts_info(st, 64, 1, st->codec->sample_rate); | ||
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return 0; | ||
} | ||
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#define MAX_SIZE 4096 | ||
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static int sox_read_packet(AVFormatContext *s, | ||
AVPacket *pkt) | ||
{ | ||
int ret; | ||
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if (url_feof(s->pb)) | ||
return AVERROR_EOF; | ||
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ret = av_get_packet(s->pb, pkt, MAX_SIZE); | ||
if (ret < 0) | ||
return AVERROR(EIO); | ||
pkt->stream_index = 0; | ||
pkt->size = ret; | ||
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return 0; | ||
} | ||
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AVInputFormat sox_demuxer = { | ||
"sox", | ||
NULL_IF_CONFIG_SMALL("SoX native format"), | ||
0, | ||
sox_probe, | ||
sox_read_header, | ||
sox_read_packet, | ||
NULL, | ||
pcm_read_seek, | ||
}; |
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/* | ||
* SoX native format muxer | ||
* Copyright (c) 2009 Daniel Verkamp <daniel@drv.nu> | ||
* | ||
* Based on libSoX sox-fmt.c | ||
* Copyright (c) 2008 robs@users.sourceforge.net | ||
* | ||
* This file is part of FFmpeg. | ||
* | ||
* FFmpeg 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, | ||
* 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 | ||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
*/ | ||
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/** | ||
* SoX native format muxer | ||
* @file libavformat/soxenc.c | ||
* @author Daniel Verkamp | ||
* @sa http://wiki.multimedia.cx/index.php?title=SoX_native_intermediate_format | ||
*/ | ||
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#include "libavutil/intreadwrite.h" | ||
#include "avformat.h" | ||
#include "sox.h" | ||
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typedef struct { | ||
int64_t header_size; | ||
} SoXContext; | ||
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static int sox_write_header(AVFormatContext *s) | ||
{ | ||
SoXContext *sox = s->priv_data; | ||
ByteIOContext *pb = s->pb; | ||
AVCodecContext *enc = s->streams[0]->codec; | ||
AVMetadataTag *comment; | ||
size_t comment_len = 0, comment_size; | ||
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comment = av_metadata_get(s->metadata, "comment", NULL, 0); | ||
if (comment) | ||
comment_len = strlen(comment->value); | ||
comment_size = (comment_len + 7) & ~7; | ||
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sox->header_size = SOX_FIXED_HDR + comment_size; | ||
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if (enc->codec_id == CODEC_ID_PCM_S32LE) { | ||
put_tag(pb, ".SoX"); | ||
put_le32(pb, sox->header_size); | ||
put_le64(pb, 0); /* number of samples */ | ||
put_le64(pb, av_dbl2int(enc->sample_rate)); | ||
put_le32(pb, enc->channels); | ||
put_le32(pb, comment_size); | ||
} else if (enc->codec_id == CODEC_ID_PCM_S32BE) { | ||
put_tag(pb, "XoS."); | ||
put_be32(pb, sox->header_size); | ||
put_be64(pb, 0); /* number of samples */ | ||
put_be64(pb, av_dbl2int(enc->sample_rate)); | ||
put_be32(pb, enc->channels); | ||
put_be32(pb, comment_size); | ||
} else { | ||
av_log(s, AV_LOG_ERROR, "invalid codec; use pcm_s32le or pcm_s32be\n"); | ||
return -1; | ||
} | ||
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if (comment_len) | ||
put_buffer(pb, comment->value, comment_len); | ||
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for ( ; comment_size > comment_len; comment_len++) | ||
put_byte(pb, 0); | ||
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put_flush_packet(pb); | ||
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return 0; | ||
} | ||
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static int sox_write_packet(AVFormatContext *s, AVPacket *pkt) | ||
{ | ||
ByteIOContext *pb = s->pb; | ||
put_buffer(pb, pkt->data, pkt->size); | ||
return 0; | ||
} | ||
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static int sox_write_trailer(AVFormatContext *s) | ||
{ | ||
SoXContext *sox = s->priv_data; | ||
ByteIOContext *pb = s->pb; | ||
AVCodecContext *enc = s->streams[0]->codec; | ||
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if (!url_is_streamed(s->pb)) { | ||
/* update number of samples */ | ||
int64_t file_size = url_ftell(pb); | ||
int64_t num_samples = (file_size - sox->header_size - 4LL) >> 2LL; | ||
url_fseek(pb, 8, SEEK_SET); | ||
if (enc->codec_id == CODEC_ID_PCM_S32LE) { | ||
put_le64(pb, num_samples); | ||
} else | ||
put_be64(pb, num_samples); | ||
url_fseek(pb, file_size, SEEK_SET); | ||
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put_flush_packet(pb); | ||
} | ||
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return 0; | ||
} | ||
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AVOutputFormat sox_muxer = { | ||
"sox", | ||
NULL_IF_CONFIG_SMALL("SoX native format"), | ||
NULL, | ||
"sox", | ||
sizeof(SoXContext), | ||
CODEC_ID_PCM_S32LE, | ||
CODEC_ID_NONE, | ||
sox_write_header, | ||
sox_write_packet, | ||
sox_write_trailer, | ||
}; |