* 8088flex TMV file demuxer
* Copyright (c) 2009 Daniel Verkamp <daniel at drv.nu>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* 8088flex TMV file demuxer
- * @file libavformat/tmv.c
+ * @file
* @author Daniel Verkamp
* @sa http://www.oldskool.org/pc/8088_Corruption
*/
unsigned stream_index;
} TMVContext;
+#define TMV_HEADER_SIZE 12
+
#define PROBE_MIN_SAMPLE_RATE 5000
#define PROBE_MAX_FPS 120
#define PROBE_MIN_AUDIO_SIZE (PROBE_MIN_SAMPLE_RATE / PROBE_MAX_FPS)
!p->buf[8] && // compression method
p->buf[9] && // char cols
p->buf[10]) // char rows
- return AVPROBE_SCORE_MAX / (p->buf[9] == 40 && p->buf[10] == 25)? 1 : 4;
+ return AVPROBE_SCORE_MAX /
+ ((p->buf[9] == 40 && p->buf[10] == 25) ? 1 : 4);
return 0;
}
static int tmv_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
TMVContext *tmv = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
AVStream *vst, *ast;
AVRational fps;
unsigned comp_method, char_cols, char_rows, features;
- if (get_le32(pb) != TMV_TAG)
+ if (avio_rl32(pb) != TMV_TAG)
return -1;
if (!(vst = av_new_stream(s, 0)))
if (!(ast = av_new_stream(s, 0)))
return AVERROR(ENOMEM);
- ast->codec->sample_rate = get_le16(pb);
+ ast->codec->sample_rate = avio_rl16(pb);
if (!ast->codec->sample_rate) {
av_log(s, AV_LOG_ERROR, "invalid sample rate\n");
return -1;
}
- tmv->audio_chunk_size = get_le16(pb);
+ tmv->audio_chunk_size = avio_rl16(pb);
if (!tmv->audio_chunk_size) {
av_log(s, AV_LOG_ERROR, "invalid audio chunk size\n");
return -1;
}
- comp_method = get_byte(pb);
+ comp_method = avio_r8(pb);
if (comp_method) {
av_log(s, AV_LOG_ERROR, "unsupported compression method %d\n",
comp_method);
return -1;
}
- char_cols = get_byte(pb);
- char_rows = get_byte(pb);
+ char_cols = avio_r8(pb);
+ char_rows = avio_r8(pb);
tmv->video_chunk_size = char_cols * char_rows * 2;
- features = get_byte(pb);
+ features = avio_r8(pb);
if (features & ~(TMV_PADDING | TMV_STEREO)) {
av_log(s, AV_LOG_ERROR, "unsupported features 0x%02x\n",
features & ~(TMV_PADDING | TMV_STEREO));
return -1;
}
- ast->codec->codec_type = CODEC_TYPE_AUDIO;
+ ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
ast->codec->codec_id = CODEC_ID_PCM_U8;
- ast->codec->sample_fmt = SAMPLE_FMT_U8;
ast->codec->channels = features & TMV_STEREO ? 2 : 1;
ast->codec->bits_per_coded_sample = 8;
ast->codec->bit_rate = ast->codec->sample_rate *
fps.den = tmv->audio_chunk_size;
av_reduce(&fps.num, &fps.den, fps.num, fps.den, 0xFFFFFFFFLL);
- vst->codec->codec_type = CODEC_TYPE_VIDEO;
+ vst->codec->codec_type = AVMEDIA_TYPE_VIDEO;
vst->codec->codec_id = CODEC_ID_TMV;
vst->codec->pix_fmt = PIX_FMT_PAL8;
vst->codec->width = char_cols * 8;
static int tmv_read_packet(AVFormatContext *s, AVPacket *pkt)
{
TMVContext *tmv = s->priv_data;
- ByteIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
int ret, pkt_size = tmv->stream_index ?
tmv->audio_chunk_size : tmv->video_chunk_size;
- if (url_feof(pb))
+ if (pb->eof_reached)
return AVERROR_EOF;
ret = av_get_packet(pb, pkt, pkt_size);
if (tmv->stream_index)
- url_fskip(pb, tmv->padding);
+ avio_skip(pb, tmv->padding);
pkt->stream_index = tmv->stream_index;
tmv->stream_index ^= 1;
- pkt->flags |= PKT_FLAG_KEY;
+ pkt->flags |= AV_PKT_FLAG_KEY;
return ret;
}
-AVInputFormat tmv_demuxer = {
+static int tmv_read_seek(AVFormatContext *s, int stream_index,
+ int64_t timestamp, int flags)
+{
+ TMVContext *tmv = s->priv_data;
+ int64_t pos;
+
+ if (stream_index)
+ return -1;
+
+ pos = timestamp *
+ (tmv->audio_chunk_size + tmv->video_chunk_size + tmv->padding);
+
+ avio_seek(s->pb, pos + TMV_HEADER_SIZE, SEEK_SET);
+ tmv->stream_index = 0;
+ return 0;
+}
+
+AVInputFormat ff_tmv_demuxer = {
"tmv",
NULL_IF_CONFIG_SMALL("8088flex TMV"),
sizeof(TMVContext),
tmv_probe,
tmv_read_header,
tmv_read_packet,
+ NULL,
+ tmv_read_seek,
.flags = AVFMT_GENERIC_INDEX,
};
projects / ffmpeg / blobdiff