0,0 → 1,112 |
/* |
* RSO muxer |
* Copyright (c) 2001 Fabrice Bellard (original AU code) |
* Copyright (c) 2010 Rafael Carre |
* |
* 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 |
*/ |
|
#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 == AV_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); |
|
return 0; |
} |
|
AVOutputFormat ff_rso_muxer = { |
.name = "rso", |
.long_name = NULL_IF_CONFIG_SMALL("Lego Mindstorms RSO"), |
.extensions = "rso", |
.audio_codec = AV_CODEC_ID_PCM_U8, |
.video_codec = AV_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}, |
.flags = AVFMT_NOTIMESTAMPS, |
}; |