mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
134 lines
4.5 KiB
134 lines
4.5 KiB
/* |
|
* 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 |
|
*/ |
|
|
|
/** |
|
* @file |
|
* SoX native format demuxer |
|
* @author Daniel Verkamp |
|
* @see http://wiki.multimedia.cx/index.php?title=SoX_native_intermediate_format |
|
*/ |
|
|
|
#include "libavutil/intreadwrite.h" |
|
#include "libavutil/intfloat.h" |
|
#include "libavutil/dict.h" |
|
#include "avformat.h" |
|
#include "internal.h" |
|
#include "pcm.h" |
|
#include "sox.h" |
|
|
|
static int sox_probe(const AVProbeData *p) |
|
{ |
|
if (AV_RL32(p->buf) == SOX_TAG || AV_RB32(p->buf) == SOX_TAG) |
|
return AVPROBE_SCORE_MAX; |
|
return 0; |
|
} |
|
|
|
static int sox_read_header(AVFormatContext *s) |
|
{ |
|
AVIOContext *pb = s->pb; |
|
unsigned header_size, comment_size; |
|
double sample_rate, sample_rate_frac; |
|
AVStream *st; |
|
|
|
st = avformat_new_stream(s, NULL); |
|
if (!st) |
|
return AVERROR(ENOMEM); |
|
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
|
|
|
if (avio_rl32(pb) == SOX_TAG) { |
|
st->codecpar->codec_id = AV_CODEC_ID_PCM_S32LE; |
|
header_size = avio_rl32(pb); |
|
avio_skip(pb, 8); /* sample count */ |
|
sample_rate = av_int2double(avio_rl64(pb)); |
|
st->codecpar->channels = avio_rl32(pb); |
|
comment_size = avio_rl32(pb); |
|
} else { |
|
st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE; |
|
header_size = avio_rb32(pb); |
|
avio_skip(pb, 8); /* sample count */ |
|
sample_rate = av_int2double(avio_rb64(pb)); |
|
st->codecpar->channels = avio_rb32(pb); |
|
comment_size = avio_rb32(pb); |
|
} |
|
|
|
if (comment_size > 0xFFFFFFFFU - SOX_FIXED_HDR - 4U) { |
|
av_log(s, AV_LOG_ERROR, "invalid comment size (%u)\n", comment_size); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
if (sample_rate <= 0 || sample_rate > INT_MAX) { |
|
av_log(s, AV_LOG_ERROR, "invalid sample rate (%f)\n", sample_rate); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
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); |
|
|
|
if ((header_size + 4) & 7 || header_size < SOX_FIXED_HDR + comment_size |
|
|| st->codecpar->channels > 65535) /* Reserve top 16 bits */ { |
|
av_log(s, AV_LOG_ERROR, "invalid header\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
if (comment_size && comment_size < UINT_MAX) { |
|
char *comment = av_malloc(comment_size+1); |
|
if(!comment) |
|
return AVERROR(ENOMEM); |
|
if (avio_read(pb, comment, comment_size) != comment_size) { |
|
av_freep(&comment); |
|
return AVERROR(EIO); |
|
} |
|
comment[comment_size] = 0; |
|
|
|
av_dict_set(&s->metadata, "comment", comment, |
|
AV_DICT_DONT_STRDUP_VAL); |
|
} |
|
|
|
avio_skip(pb, header_size - SOX_FIXED_HDR - comment_size); |
|
|
|
st->codecpar->sample_rate = sample_rate; |
|
st->codecpar->bits_per_coded_sample = 32; |
|
st->codecpar->bit_rate = (int64_t)st->codecpar->sample_rate * |
|
st->codecpar->bits_per_coded_sample * |
|
st->codecpar->channels; |
|
st->codecpar->block_align = st->codecpar->bits_per_coded_sample * |
|
st->codecpar->channels / 8; |
|
|
|
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
|
|
|
return 0; |
|
} |
|
|
|
AVInputFormat ff_sox_demuxer = { |
|
.name = "sox", |
|
.long_name = NULL_IF_CONFIG_SMALL("SoX native"), |
|
.read_probe = sox_probe, |
|
.read_header = sox_read_header, |
|
.read_packet = ff_pcm_read_packet, |
|
.read_seek = ff_pcm_read_seek, |
|
};
|
|
|