mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-12-05 01:57:02 +00:00
103 lines
3.0 KiB
C
103 lines
3.0 KiB
C
/*
|
|
* RSO demuxer
|
|
* 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 "libavutil/intreadwrite.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "pcm.h"
|
|
#include "riff.h"
|
|
#include "rso.h"
|
|
|
|
static int rso_read_header(AVFormatContext *s, AVFormatParameters *ap)
|
|
{
|
|
ByteIOContext *pb = s->pb;
|
|
int id, rate, bps;
|
|
unsigned int size;
|
|
enum CodecID codec;
|
|
AVStream *st;
|
|
|
|
id = get_be16(pb);
|
|
size = get_be16(pb);
|
|
rate = get_be16(pb);
|
|
get_be16(pb); /* play mode ? (0x0000 = don't loop) */
|
|
|
|
codec = ff_codec_get_id(ff_codec_rso_tags, id);
|
|
|
|
if (codec == CODEC_ID_ADPCM_IMA_WAV) {
|
|
av_log(s, AV_LOG_ERROR, "ADPCM in RSO not implemented\n");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
bps = av_get_bits_per_sample(codec);
|
|
if (!bps) {
|
|
av_log_ask_for_sample(s, "could not determine bits per sample\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/* now we are ready: build format streams */
|
|
st = av_new_stream(s, 0);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
st->duration = (size * 8) / bps;
|
|
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codec->codec_tag = id;
|
|
st->codec->codec_id = codec;
|
|
st->codec->channels = 1;
|
|
st->codec->sample_rate = rate;
|
|
|
|
av_set_pts_info(st, 64, 1, rate);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define BLOCK_SIZE 1024 /* in samples */
|
|
|
|
static int rso_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int bps = av_get_bits_per_sample(s->streams[0]->codec->codec_id);
|
|
int ret = av_get_packet(s->pb, pkt, BLOCK_SIZE * bps >> 3);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
pkt->stream_index = 0;
|
|
|
|
/* note: we need to modify the packet size here to handle the last packet */
|
|
pkt->size = ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat rso_demuxer = {
|
|
.name = "rso",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Lego Mindstorms RSO format"),
|
|
.extensions = "rso",
|
|
.priv_data_size = 0,
|
|
.read_probe = NULL, /* no magic value in this format */
|
|
.read_header = rso_read_header,
|
|
.read_packet = rso_read_packet,
|
|
.read_close = NULL,
|
|
.read_seek = pcm_read_seek,
|
|
.codec_tag = (const AVCodecTag* const []){ff_codec_rso_tags, 0},
|
|
};
|