mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
4dcd1a3145
* qatar/master: adtsenc: Check frame size. txd: Fix order of operations. APIchanges: fill in some blanks timer: fix misspelling of "decicycles" Eliminate pointless 0/NULL initializers in AVCodec and similar declarations. indeo3: cosmetics md5proto: Fix order of operations. dca: Replace oversized unused get_bits() with skip_bits_long(). Conflicts: doc/APIchanges libavformat/mmsh.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
/*
|
|
* 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 == 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",
|
|
.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},
|
|
};
|