*/
/**
- * @file libavformat/ipmovie.c
+ * @file
* Interplay MVE file demuxer
* by Mike Melanson (melanson@pcisys.net)
* For more information regarding the Interplay MVE file format, visit:
#define DEBUG_IPMOVIE 0
#if DEBUG_IPMOVIE
+#undef printf
#define debug_ipmovie printf
#else
static inline void debug_ipmovie(const char *format, ...) { }
#endif
-#define IPMOVIE_SIGNATURE "Interplay MVE File\x1A\0"
-#define IPMOVIE_SIGNATURE_SIZE 20
#define CHUNK_PREAMBLE_SIZE 4
#define OPCODE_PREAMBLE_SIZE 4
unsigned char *buf;
int buf_size;
- float fps;
- int frame_pts_inc;
+ uint64_t frame_pts_inc;
+ unsigned int video_bpp;
unsigned int video_width;
unsigned int video_height;
int64_t video_pts;
AVPacket *pkt) {
int chunk_type;
- int64_t audio_pts = 0;
if (s->audio_chunk_offset) {
url_fseek(pb, s->audio_chunk_offset, SEEK_SET);
s->audio_chunk_offset = 0;
- /* figure out the audio pts */
- audio_pts = 90000;
- audio_pts *= s->audio_frame_count;
- audio_pts /= s->audio_sample_rate;
-
if (s->audio_chunk_size != av_get_packet(pb, pkt, s->audio_chunk_size))
return CHUNK_EOF;
pkt->stream_index = s->audio_stream_index;
- pkt->pts = audio_pts;
+ pkt->pts = s->audio_frame_count;
/* audio frame maintenance */
if (s->audio_type != CODEC_ID_INTERPLAY_DPCM)
(s->audio_chunk_size - 6) / s->audio_channels;
debug_ipmovie("sending audio frame with pts %"PRId64" (%d audio frames)\n",
- audio_pts, s->audio_frame_count);
+ pkt->pts, s->audio_frame_count);
chunk_type = CHUNK_VIDEO;
chunk_type = CHUNK_BAD;
break;
}
- s->fps = 1000000.0 / (AV_RL32(&scratch[0]) * AV_RL16(&scratch[4]));
- s->frame_pts_inc = 90000 / s->fps;
+ s->frame_pts_inc = ((uint64_t)AV_RL32(&scratch[0])) * AV_RL16(&scratch[4]);
debug_ipmovie(" %.2f frames/second (timer div = %d, subdiv = %d)\n",
- s->fps, AV_RL32(&scratch[0]), AV_RL16(&scratch[4]));
+ 1000000.0/s->frame_pts_inc, AV_RL32(&scratch[0]), AV_RL16(&scratch[4]));
break;
case OPCODE_INIT_AUDIO_BUFFERS:
}
s->video_width = AV_RL16(&scratch[0]) * 8;
s->video_height = AV_RL16(&scratch[2]) * 8;
+ if (opcode_version < 2 || !AV_RL16(&scratch[6])) {
+ s->video_bpp = 8;
+ } else {
+ s->video_bpp = 16;
+ }
debug_ipmovie("video resolution: %d x %d\n",
s->video_width, s->video_height);
break;
return chunk_type;
}
+static const char signature[] = "Interplay MVE File\x1A\0\x1A";
+
static int ipmovie_probe(AVProbeData *p)
{
- if (strncmp(p->buf, IPMOVIE_SIGNATURE, IPMOVIE_SIGNATURE_SIZE) != 0)
- return 0;
+ uint8_t *b = p->buf;
+ uint8_t *b_end = p->buf + p->buf_size - sizeof(signature);
+ do {
+ if (memcmp(b++, signature, sizeof(signature)) == 0)
+ return AVPROBE_SCORE_MAX;
+ } while (b < b_end);
- return AVPROBE_SCORE_MAX;
+ return 0;
}
static int ipmovie_read_header(AVFormatContext *s,
AVStream *st;
unsigned char chunk_preamble[CHUNK_PREAMBLE_SIZE];
int chunk_type;
-
+ uint8_t signature_buffer[sizeof(signature)];
+
+ get_buffer(pb, signature_buffer, sizeof(signature_buffer));
+ while (memcmp(signature_buffer, signature, sizeof(signature))) {
+ memmove(signature_buffer, signature_buffer + 1, sizeof(signature_buffer) - 1);
+ signature_buffer[sizeof(signature_buffer) - 1] = get_byte(pb);
+ if (url_feof(pb))
+ return AVERROR_EOF;
+ }
/* initialize private context members */
ipmovie->video_pts = ipmovie->audio_frame_count = 0;
ipmovie->audio_chunk_offset = ipmovie->video_chunk_offset =
ipmovie->decode_map_chunk_offset = 0;
/* on the first read, this will position the stream at the first chunk */
- ipmovie->next_chunk_offset = IPMOVIE_SIGNATURE_SIZE + 6;
+ ipmovie->next_chunk_offset = url_ftell(pb) + 4;
/* process the first chunk which should be CHUNK_INIT_VIDEO */
if (process_ipmovie_chunk(ipmovie, pb, &pkt) != CHUNK_INIT_VIDEO)
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
- av_set_pts_info(st, 33, 1, 90000);
+ av_set_pts_info(st, 63, 1, 1000000);
ipmovie->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_INTERPLAY_VIDEO;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->width = ipmovie->video_width;
st->codec->height = ipmovie->video_height;
+ st->codec->bits_per_coded_sample = ipmovie->video_bpp;
/* palette considerations */
st->codec->palctrl = &ipmovie->palette_control;
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
- av_set_pts_info(st, 33, 1, 90000);
+ av_set_pts_info(st, 32, 1, ipmovie->audio_sample_rate);
ipmovie->audio_stream_index = st->index;
- st->codec->codec_type = CODEC_TYPE_AUDIO;
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = ipmovie->audio_type;
st->codec->codec_tag = 0; /* no tag */
st->codec->channels = ipmovie->audio_channels;