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.
114 lines
3.3 KiB
114 lines
3.3 KiB
/* |
|
* RSO muxer |
|
* Copyright (c) 2001 Fabrice Bellard (original AU code) |
|
* Copyright (c) 2010 Rafael Carre |
|
* |
|
* This file is part of Libav. |
|
* |
|
* 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. |
|
* |
|
* 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 Libav; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
#include "avformat.h" |
|
#include "internal.h" |
|
#include "riff.h" |
|
#include "rso.h" |
|
|
|
static int rso_write_header(AVFormatContext *s) |
|
{ |
|
AVIOContext *pb = s->pb; |
|
AVCodecContext *enc = s->streams[0]->codec; |
|
|
|
if (!enc->codec_tag) |
|
return AVERROR_INVALIDDATA; |
|
|
|
if (enc->channels != 1) { |
|
av_log(s, AV_LOG_ERROR, "RSO only supports mono\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
if (!s->pb->seekable) { |
|
av_log(s, AV_LOG_ERROR, "muxer does not support non seekable output\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
/* XXX: find legal sample rates (if any) */ |
|
if (enc->sample_rate >= 1u<<16) { |
|
av_log(s, AV_LOG_ERROR, "Sample rate must be < 65536\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
if (enc->codec_id == CODEC_ID_ADPCM_IMA_WAV) { |
|
av_log(s, AV_LOG_ERROR, "ADPCM in RSO not implemented\n"); |
|
return AVERROR_PATCHWELCOME; |
|
} |
|
|
|
/* format header */ |
|
avio_wb16(pb, enc->codec_tag); /* codec ID */ |
|
avio_wb16(pb, 0); /* data size, will be written at EOF */ |
|
avio_wb16(pb, enc->sample_rate); |
|
avio_wb16(pb, 0x0000); /* play mode ? (0x0000 = don't loop) */ |
|
|
|
avio_flush(pb); |
|
|
|
return 0; |
|
} |
|
|
|
static int rso_write_packet(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
avio_write(s->pb, pkt->data, pkt->size); |
|
return 0; |
|
} |
|
|
|
static int rso_write_trailer(AVFormatContext *s) |
|
{ |
|
AVIOContext *pb = s->pb; |
|
int64_t file_size; |
|
uint16_t coded_file_size; |
|
|
|
file_size = avio_tell(pb); |
|
|
|
if (file_size < 0) |
|
return file_size; |
|
|
|
if (file_size > 0xffff + RSO_HEADER_SIZE) { |
|
av_log(s, AV_LOG_WARNING, |
|
"Output file is too big (%"PRId64" bytes >= 64kB)\n", file_size); |
|
coded_file_size = 0xffff; |
|
} else { |
|
coded_file_size = file_size - RSO_HEADER_SIZE; |
|
} |
|
|
|
/* update file size */ |
|
avio_seek(pb, 2, SEEK_SET); |
|
avio_wb16(pb, coded_file_size); |
|
avio_seek(pb, file_size, SEEK_SET); |
|
|
|
avio_flush(pb); |
|
|
|
return 0; |
|
} |
|
|
|
AVOutputFormat ff_rso_muxer = { |
|
.name = "rso", |
|
.long_name = NULL_IF_CONFIG_SMALL("Lego Mindstorms RSO format"), |
|
.extensions = "rso", |
|
.priv_data_size = 0, |
|
.audio_codec = CODEC_ID_PCM_U8, |
|
.video_codec = CODEC_ID_NONE, |
|
.write_header = rso_write_header, |
|
.write_packet = rso_write_packet, |
|
.write_trailer = rso_write_trailer, |
|
.codec_tag = (const AVCodecTag* const []){ff_codec_rso_tags, 0}, |
|
};
|
|
|