0,0 → 1,110 |
/* |
* Megalux Frame demuxer |
* Copyright (c) 2010 Peter Ross <pross@xvid.org> |
* |
* 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 |
* Megalux Frame demuxer |
*/ |
|
#include "libavcodec/raw.h" |
#include "libavutil/intreadwrite.h" |
#include "avformat.h" |
|
static const PixelFormatTag frm_pix_fmt_tags[] = { |
{ AV_PIX_FMT_RGB555, 1 }, |
{ AV_PIX_FMT_RGB0, 2 }, |
{ AV_PIX_FMT_RGB24, 3 }, |
{ AV_PIX_FMT_BGR0, 4 }, |
{ AV_PIX_FMT_BGRA, 5 }, |
{ AV_PIX_FMT_NONE, 0 }, |
}; |
|
typedef struct { |
int count; |
} FrmContext; |
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static int frm_read_probe(AVProbeData *p) |
{ |
if (p->buf_size > 8 && |
p->buf[0] == 'F' && p->buf[1] == 'R' && p->buf[2] == 'M' && |
AV_RL16(&p->buf[4]) && AV_RL16(&p->buf[6])) |
return AVPROBE_SCORE_MAX / 4; |
return 0; |
} |
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static int frm_read_header(AVFormatContext *avctx) |
{ |
AVIOContext *pb = avctx->pb; |
AVStream *st = avformat_new_stream(avctx, 0); |
if (!st) |
return AVERROR(ENOMEM); |
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
st->codec->codec_id = AV_CODEC_ID_RAWVIDEO; |
avio_skip(pb, 3); |
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st->codec->pix_fmt = avpriv_find_pix_fmt(frm_pix_fmt_tags, avio_r8(pb)); |
if (!st->codec->pix_fmt) |
return AVERROR_INVALIDDATA; |
|
st->codec->codec_tag = 0; |
st->codec->width = avio_rl16(pb); |
st->codec->height = avio_rl16(pb); |
return 0; |
} |
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static int frm_read_packet(AVFormatContext *avctx, AVPacket *pkt) |
{ |
FrmContext *s = avctx->priv_data; |
AVCodecContext *stc = avctx->streams[0]->codec; |
int packet_size, ret; |
|
if (s->count) |
return AVERROR_EOF; |
|
packet_size = avpicture_get_size(stc->pix_fmt, stc->width, stc->height); |
if (packet_size < 0) |
return AVERROR_INVALIDDATA; |
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ret = av_get_packet(avctx->pb, pkt, packet_size); |
if (ret < 0) |
return ret; |
|
if (stc->pix_fmt == AV_PIX_FMT_BGRA) { |
int i; |
for (i = 3; i + 1 <= pkt->size; i += 4) |
pkt->data[i] = 0xFF - pkt->data[i]; |
} |
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pkt->stream_index = 0; |
s->count++; |
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return 0; |
} |
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AVInputFormat ff_frm_demuxer = { |
.name = "frm", |
.priv_data_size = sizeof(FrmContext), |
.long_name = NULL_IF_CONFIG_SMALL("Megalux Frame"), |
.read_probe = frm_read_probe, |
.read_header = frm_read_header, |
.read_packet = frm_read_packet, |
}; |