Commit b64c096b authored by Sisir Koppaka's avatar Sisir Koppaka Committed by Vitor Sessak
Browse files

BFI demuxer

Patch by Sisir Koppaka (sisir.koppaka at G.M!A.I!L.com)

Originally committed as revision 12808 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 8c2a4ddc
......@@ -118,6 +118,7 @@ version <next>
- RL2 demuxer / decoder
- IFF demuxer
- 8SVX audio decoder
- BFI demuxer
version 0.4.9-pre1:
......
......@@ -135,6 +135,8 @@ different game cutscenes repacked for use with ScummVM.
@tab Audio and video format used in some games by Entertainment Software Partners
@item IFF @tab @tab X
@tab Interchange File Format
@item BFI @tab @tab
@tab Brute Force & Ignorance, used in Flash Traffic: City of Angels
@end multitable
@code{X} means that encoding (resp. decoding) is supported.
......
......@@ -185,6 +185,7 @@ enum CodecID {
CODEC_ID_8SVX_FIB,
CODEC_ID_ESCAPE124,
CODEC_ID_DIRAC,
CODEC_ID_BFI,
/* various PCM "codecs" */
CODEC_ID_PCM_S16LE= 0x10000,
......
......@@ -33,6 +33,7 @@ OBJS-$(CONFIG_AVISYNTH) += avisynth.o
OBJS-$(CONFIG_AVM2_MUXER) += swf.o
OBJS-$(CONFIG_AVS_DEMUXER) += avs.o vocdec.o voc.o
OBJS-$(CONFIG_BETHSOFTVID_DEMUXER) += bethsoftvid.o
OBJS-$(CONFIG_BFI_DEMUXER) += bfi.o
OBJS-$(CONFIG_C93_DEMUXER) += c93.o vocdec.o voc.o
OBJS-$(CONFIG_CRC_MUXER) += crcenc.o
OBJS-$(CONFIG_DAUD_DEMUXER) += daud.o
......
......@@ -65,6 +65,7 @@ void av_register_all(void)
REGISTER_MUXER (AVM2, avm2);
REGISTER_DEMUXER (AVS, avs);
REGISTER_DEMUXER (BETHSOFTVID, bethsoftvid);
REGISTER_DEMUXER (BFI, bfi);
REGISTER_DEMUXER (C93, c93);
REGISTER_MUXER (CRC, crc);
REGISTER_DEMUXER (DAUD, daud);
......
/*
* Brute Force & Ignorance (BFI) demuxer
* Copyright (c) 2008 Sisir Koppaka
*
* 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 bfi.c
* @brief Brute Force & Ignorance (.bfi) file demuxer
* @author Sisir Koppaka ( sisir.koppaka at gmail dot com )
* @sa http://wiki.multimedia.cx/index.php?title=BFI
*/
#include "avformat.h"
typedef struct BFIContext {
int nframes;
int audio_frame;
int video_frame;
int video_size;
int avflag;
} BFIContext;
static int bfi_probe(AVProbeData * p)
{
/* Check file header */
if (AV_RL32(p->buf) == MKTAG('B', 'F', '&', 'I'))
return AVPROBE_SCORE_MAX;
else
return 0;
}
static int bfi_read_header(AVFormatContext * s, AVFormatParameters * ap)
{
BFIContext *bfi = s->priv_data;
ByteIOContext *pb = s->pb;
AVStream *vstream;
AVStream *astream;
int fps, chunk_header;
/* Initialize the video codec... */
vstream = av_new_stream(s, 0);
if (!vstream)
return AVERROR(ENOMEM);
/* Initialize the audio codec... */
astream = av_new_stream(s, 0);
if (!astream)
return AVERROR(ENOMEM);
/* Set the total number of frames. */
url_fskip(pb, 8);
chunk_header = get_le32(pb);
bfi->nframes = get_le32(pb);
get_le32(pb);
get_le32(pb);
get_le32(pb);
fps = get_le32(pb);
url_fskip(pb, 12);
vstream->codec->width = get_le32(pb);
vstream->codec->height = get_le32(pb);
/*Load the palette to extradata */
url_fskip(pb, 8);
vstream->codec->extradata = av_malloc(768);
vstream->codec->extradata_size = 768;
get_buffer(pb, vstream->codec->extradata,
vstream->codec->extradata_size);
astream->codec->sample_rate = get_le32(pb);
/* Set up the video codec... */
av_set_pts_info(vstream, 32, 1, fps);
vstream->codec->codec_type = CODEC_TYPE_VIDEO;
vstream->codec->codec_id = CODEC_ID_BFI;
vstream->codec->pix_fmt = PIX_FMT_PAL8;
/* Set up the audio codec now... */
astream->codec->codec_type = CODEC_TYPE_AUDIO;
astream->codec->codec_id = CODEC_ID_PCM_U8;
astream->codec->channels = 1;
astream->codec->bits_per_sample = 8;
astream->codec->bit_rate =
astream->codec->sample_rate * astream->codec->bits_per_sample;
url_fseek(pb, chunk_header - 3, SEEK_SET);
av_set_pts_info(astream, 64, 1, astream->codec->sample_rate);
return 0;
}
static int bfi_read_packet(AVFormatContext * s, AVPacket * pkt)
{
BFIContext *bfi = s->priv_data;
ByteIOContext *pb = s->pb;
int ret, audio_offset, video_offset, chunk_size, audio_size = 0;
if (bfi->nframes == 0 || url_feof(pb)) {
return AVERROR(EIO);
}
/* If all previous chunks were completely read, then find a new one... */
if (!bfi->avflag) {
uint32_t state = 0;
while(state != MKTAG('S','A','V','I')){
if (url_feof(pb))
return AVERROR(EIO);
state = 256*state + get_byte(pb);
}
/* Now that the chunk's location is confirmed, we proceed... */
chunk_size = get_le32(pb);
get_le32(pb);
audio_offset = get_le32(pb);
get_le32(pb);
video_offset = get_le32(pb);
audio_size = video_offset - audio_offset;
bfi->video_size = chunk_size - video_offset;
//Tossing an audio packet at the audio decoder.
ret = av_get_packet(pb, pkt, audio_size);
if (ret < 0)
return ret;
pkt->pts = bfi->audio_frame;
bfi->audio_frame += ret;
}
else {
//Tossing a video packet at the video decoder.
ret = av_get_packet(pb, pkt, bfi->video_size);
if (ret < 0)
return ret;
pkt->pts = bfi->video_frame;
bfi->video_frame += ret / bfi->video_size;
/* One less frame to read. A cursory decrement. */
bfi->nframes--;
}
bfi->avflag = !bfi->avflag;
pkt->stream_index = bfi->avflag;
return ret;
}
AVInputFormat bfi_demuxer = {
"bfi",
"Brute Force & Ignorance",
sizeof(BFIContext),
bfi_probe,
bfi_read_header,
bfi_read_packet,
};
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment