*/
/**
- * @file flic.c
+ * @file
* FLI/FLC file demuxer
* by Mike Melanson (melanson@pcisys.net)
* for more information on the .fli/.flc file format and all of its many
* variations, visit:
* http://www.compuphase.com/flic.htm
*
- * This demuxer handles standard 0xAF11- and 0xAF12-type FLIs. It also
- * handles special FLIs from the PC game "Magic Carpet".
+ * This demuxer handles standard 0xAF11- and 0xAF12-type FLIs. It also handles
+ * special FLIs from the PC games "Magic Carpet" and "X-COM: Terror from the Deep".
*/
+#include "libavutil/intreadwrite.h"
#include "avformat.h"
#define FLIC_FILE_MAGIC_1 0xAF11
#define FLIC_CHUNK_MAGIC_2 0xF5FA
#define FLIC_MC_SPEED 5 /* speed for Magic Carpet game FLIs */
#define FLIC_DEFAULT_SPEED 5 /* for FLIs that have 0 speed */
+#define FLIC_TFTD_CHUNK_AUDIO 0xAAAA /* Audio chunk. Used in Terror from the Deep.
+ Has 10 B extra header not accounted for in the chunk header */
+#define FLIC_TFTD_SAMPLE_RATE 22050
#define FLIC_HEADER_SIZE 128
#define FLIC_PREAMBLE_SIZE 6
typedef struct FlicDemuxContext {
int video_stream_index;
+ int audio_stream_index;
int frame_number;
} FlicDemuxContext;
{
int magic_number;
+ if(p->buf_size < FLIC_HEADER_SIZE)
+ return 0;
+
magic_number = AV_RL16(&p->buf[4]);
if ((magic_number != FLIC_FILE_MAGIC_1) &&
(magic_number != FLIC_FILE_MAGIC_2) &&
(magic_number != FLIC_FILE_MAGIC_3))
return 0;
+ if(AV_RL16(&p->buf[0x10]) != FLIC_CHUNK_MAGIC_1){
+ if(AV_RL32(&p->buf[0x10]) > 2000)
+ return 0;
+ }
+
+ if( AV_RL16(&p->buf[0x08]) > 4096
+ || AV_RL16(&p->buf[0x0A]) > 4096)
+ return 0;
+
+
return AVPROBE_SCORE_MAX;
}
FlicDemuxContext *flic = s->priv_data;
ByteIOContext *pb = s->pb;
unsigned char header[FLIC_HEADER_SIZE];
- AVStream *st;
+ AVStream *st, *ast;
int speed;
int magic_number;
+ unsigned char preamble[FLIC_PREAMBLE_SIZE];
flic->frame_number = 0;
if (!st)
return AVERROR(ENOMEM);
flic->video_stream_index = st->index;
- st->codec->codec_type = CODEC_TYPE_VIDEO;
+ st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_FLIC;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->width = AV_RL16(&header[0x08]);
st->codec->extradata = av_malloc(FLIC_HEADER_SIZE);
memcpy(st->codec->extradata, header, FLIC_HEADER_SIZE);
- /* Time to figure out the framerate: If there is a FLIC chunk magic
- * number at offset 0x10, assume this is from the Bullfrog game,
- * Magic Carpet. */
- if (AV_RL16(&header[0x10]) == FLIC_CHUNK_MAGIC_1) {
+ /* peek at the preamble to detect TFTD videos - they seem to always start with an audio chunk */
+ if (get_buffer(pb, preamble, FLIC_PREAMBLE_SIZE) != FLIC_PREAMBLE_SIZE) {
+ av_log(s, AV_LOG_ERROR, "Failed to peek at preamble\n");
+ return AVERROR(EIO);
+ }
+
+ url_fseek(pb, -FLIC_PREAMBLE_SIZE, SEEK_CUR);
+
+ /* Time to figure out the framerate:
+ * If the first preamble's magic number is 0xAAAA then this file is from
+ * X-COM: Terror from the Deep. If on the other hand there is a FLIC chunk
+ * magic number at offset 0x10 assume this file is from Magic Carpet instead.
+ * If neither of the above is true then this is a normal FLIC file.
+ */
+ if (AV_RL16(&preamble[4]) == FLIC_TFTD_CHUNK_AUDIO) {
+ /* TFTD videos have an extra 22050 Hz 8-bit mono audio stream */
+ ast = av_new_stream(s, 1);
+ if (!ast)
+ return AVERROR(ENOMEM);
+
+ flic->audio_stream_index = ast->index;
+
+ /* all audio frames are the same size, so use the size of the first chunk for block_align */
+ ast->codec->block_align = AV_RL32(&preamble[0]);
+ ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ ast->codec->codec_id = CODEC_ID_PCM_U8;
+ ast->codec->codec_tag = 0;
+ ast->codec->sample_rate = FLIC_TFTD_SAMPLE_RATE;
+ ast->codec->channels = 1;
+ ast->codec->sample_fmt = AV_SAMPLE_FMT_U8;
+ ast->codec->bit_rate = st->codec->sample_rate * 8;
+ ast->codec->bits_per_coded_sample = 8;
+ ast->codec->channel_layout = CH_LAYOUT_MONO;
+ ast->codec->extradata_size = 0;
+ /* Since the header information is incorrect we have to figure out the
+ * framerate using block_align and the fact that the audio is 22050 Hz.
+ * We usually have two cases: 2205 -> 10 fps and 1470 -> 15 fps */
+ av_set_pts_info(st, 64, ast->codec->block_align, FLIC_TFTD_SAMPLE_RATE);
+ av_set_pts_info(ast, 64, 1, FLIC_TFTD_SAMPLE_RATE);
+ } else if (AV_RL16(&header[0x10]) == FLIC_CHUNK_MAGIC_1) {
av_set_pts_info(st, 64, FLIC_MC_SPEED, 70);
/* rewind the stream since the first chunk is at offset 12 */
av_free_packet(pkt);
ret = AVERROR(EIO);
}
+ packet_read = 1;
+ } else if (magic == FLIC_TFTD_CHUNK_AUDIO) {
+ if (av_new_packet(pkt, size)) {
+ ret = AVERROR(EIO);
+ break;
+ }
+
+ /* skip useless 10B sub-header (yes, it's not accounted for in the chunk header) */
+ url_fseek(pb, 10, SEEK_CUR);
+
+ pkt->stream_index = flic->audio_stream_index;
+ pkt->pos = url_ftell(pb);
+ ret = get_buffer(pb, pkt->data, size);
+
+ if (ret != size) {
+ av_free_packet(pkt);
+ ret = AVERROR(EIO);
+ }
+
packet_read = 1;
} else {
/* not interested in this chunk */
projects / ffmpeg / blobdiff