252 lines
7.3 KiB
C
Executable file
252 lines
7.3 KiB
C
Executable file
/*
|
|
* LucasArts Smush demuxer
|
|
* Copyright (c) 2006 Cyril Zorin
|
|
*
|
|
* 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 "avio.h"
|
|
#include "internal.h"
|
|
|
|
typedef struct SMUSHContext {
|
|
int version;
|
|
int audio_stream_index;
|
|
int video_stream_index;
|
|
} SMUSHContext;
|
|
|
|
static int smush_read_probe(const AVProbeData *p)
|
|
{
|
|
if (((AV_RL32(p->buf) == MKTAG('S', 'A', 'N', 'M') &&
|
|
AV_RL32(p->buf + 8) == MKTAG('S', 'H', 'D', 'R')) ||
|
|
(AV_RL32(p->buf) == MKTAG('A', 'N', 'I', 'M') &&
|
|
AV_RL32(p->buf + 8) == MKTAG('A', 'H', 'D', 'R')))) {
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smush_read_header(AVFormatContext *ctx)
|
|
{
|
|
SMUSHContext *smush = ctx->priv_data;
|
|
AVIOContext *pb = ctx->pb;
|
|
AVStream *vst, *ast;
|
|
uint32_t magic, nframes, size, subversion, i;
|
|
uint32_t width = 0, height = 0, got_audio = 0, read = 0;
|
|
uint32_t sample_rate, channels, palette[256];
|
|
int ret;
|
|
|
|
magic = avio_rb32(pb);
|
|
avio_skip(pb, 4); // skip movie size
|
|
|
|
if (magic == MKBETAG('A', 'N', 'I', 'M')) {
|
|
if (avio_rb32(pb) != MKBETAG('A', 'H', 'D', 'R'))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
size = avio_rb32(pb);
|
|
if (size < 3 * 256 + 6)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
smush->version = 0;
|
|
subversion = avio_rl16(pb);
|
|
nframes = avio_rl16(pb);
|
|
if (!nframes)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
avio_skip(pb, 2); // skip pad
|
|
|
|
for (i = 0; i < 256; i++)
|
|
palette[i] = avio_rb24(pb);
|
|
|
|
avio_skip(pb, size - (3 * 256 + 6));
|
|
} else if (magic == MKBETAG('S', 'A', 'N', 'M')) {
|
|
if (avio_rb32(pb) != MKBETAG('S', 'H', 'D', 'R'))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
size = avio_rb32(pb);
|
|
if (size < 14)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
smush->version = 1;
|
|
subversion = avio_rl16(pb);
|
|
nframes = avio_rl32(pb);
|
|
if (!nframes)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
avio_skip(pb, 2); // skip pad
|
|
width = avio_rl16(pb);
|
|
height = avio_rl16(pb);
|
|
avio_skip(pb, 2); // skip pad
|
|
avio_skip(pb, size - 14);
|
|
|
|
if (avio_rb32(pb) != MKBETAG('F', 'L', 'H', 'D'))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
size = avio_rb32(pb);
|
|
while (!got_audio && ((read + 8) < size)) {
|
|
uint32_t sig, chunk_size;
|
|
|
|
if (avio_feof(pb))
|
|
return AVERROR_EOF;
|
|
|
|
sig = avio_rb32(pb);
|
|
chunk_size = avio_rb32(pb);
|
|
read += 8;
|
|
switch (sig) {
|
|
case MKBETAG('W', 'a', 'v', 'e'):
|
|
got_audio = 1;
|
|
sample_rate = avio_rl32(pb);
|
|
if (!sample_rate)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
channels = avio_rl32(pb);
|
|
if (!channels)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
avio_skip(pb, chunk_size - 8);
|
|
read += chunk_size;
|
|
break;
|
|
case MKBETAG('B', 'l', '1', '6'):
|
|
case MKBETAG('A', 'N', 'N', 'O'):
|
|
avio_skip(pb, chunk_size);
|
|
read += chunk_size;
|
|
break;
|
|
default:
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|
|
|
|
avio_skip(pb, size - read);
|
|
} else {
|
|
av_log(ctx, AV_LOG_ERROR, "Wrong magic\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
vst = avformat_new_stream(ctx, 0);
|
|
if (!vst)
|
|
return AVERROR(ENOMEM);
|
|
|
|
smush->video_stream_index = vst->index;
|
|
|
|
avpriv_set_pts_info(vst, 64, 1, 15);
|
|
|
|
vst->start_time = 0;
|
|
vst->duration =
|
|
vst->nb_frames = nframes;
|
|
vst->avg_frame_rate = av_inv_q(vst->time_base);
|
|
vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
vst->codecpar->codec_id = AV_CODEC_ID_SANM;
|
|
vst->codecpar->codec_tag = 0;
|
|
vst->codecpar->width = width;
|
|
vst->codecpar->height = height;
|
|
|
|
if (!smush->version) {
|
|
if ((ret = ff_alloc_extradata(vst->codecpar, 1024 + 2)) < 0)
|
|
return ret;
|
|
|
|
AV_WL16(vst->codecpar->extradata, subversion);
|
|
for (i = 0; i < 256; i++)
|
|
AV_WL32(vst->codecpar->extradata + 2 + i * 4, palette[i]);
|
|
}
|
|
|
|
if (got_audio) {
|
|
ast = avformat_new_stream(ctx, 0);
|
|
if (!ast)
|
|
return AVERROR(ENOMEM);
|
|
|
|
smush->audio_stream_index = ast->index;
|
|
|
|
ast->start_time = 0;
|
|
ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
ast->codecpar->codec_id = AV_CODEC_ID_ADPCM_VIMA;
|
|
ast->codecpar->codec_tag = 0;
|
|
ast->codecpar->sample_rate = sample_rate;
|
|
ast->codecpar->channels = channels;
|
|
|
|
avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smush_read_packet(AVFormatContext *ctx, AVPacket *pkt)
|
|
{
|
|
SMUSHContext *smush = ctx->priv_data;
|
|
AVIOContext *pb = ctx->pb;
|
|
int done = 0;
|
|
int ret;
|
|
|
|
while (!done) {
|
|
uint32_t sig, size;
|
|
|
|
if (avio_feof(pb))
|
|
return AVERROR_EOF;
|
|
|
|
sig = avio_rb32(pb);
|
|
size = avio_rb32(pb);
|
|
|
|
switch (sig) {
|
|
case MKBETAG('F', 'R', 'M', 'E'):
|
|
if (smush->version)
|
|
break;
|
|
if ((ret = av_get_packet(pb, pkt, size)) < 0)
|
|
return ret;
|
|
|
|
pkt->stream_index = smush->video_stream_index;
|
|
done = 1;
|
|
break;
|
|
case MKBETAG('B', 'l', '1', '6'):
|
|
if ((ret = av_get_packet(pb, pkt, size)) < 0)
|
|
return ret;
|
|
|
|
pkt->stream_index = smush->video_stream_index;
|
|
pkt->duration = 1;
|
|
done = 1;
|
|
break;
|
|
case MKBETAG('W', 'a', 'v', 'e'):
|
|
if (size < 13)
|
|
return AVERROR_INVALIDDATA;
|
|
if (av_get_packet(pb, pkt, size) < 13)
|
|
return AVERROR(EIO);
|
|
|
|
pkt->stream_index = smush->audio_stream_index;
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
pkt->duration = AV_RB32(pkt->data);
|
|
if (pkt->duration == 0xFFFFFFFFu)
|
|
pkt->duration = AV_RB32(pkt->data + 8);
|
|
done = 1;
|
|
break;
|
|
default:
|
|
avio_skip(pb, size);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_smush_demuxer = {
|
|
.name = "smush",
|
|
.long_name = NULL_IF_CONFIG_SMALL("LucasArts Smush"),
|
|
.priv_data_size = sizeof(SMUSHContext),
|
|
.read_probe = smush_read_probe,
|
|
.read_header = smush_read_header,
|
|
.read_packet = smush_read_packet,
|
|
};
|