/*
* American Laser Games MM Video Decoder
- * Copyright (c) 2006 Peter Ross
+ * Copyright (c) 2006,2008 Peter Ross
*
* This file is part of FFmpeg.
*
#define MM_TYPE_INTER_HH 0xd
#define MM_TYPE_INTRA_HHV 0xe
#define MM_TYPE_INTER_HHV 0xf
+#define MM_TYPE_PALETTE 0x31
typedef struct MmContext {
AVCodecContext *avctx;
AVFrame frame;
+ int palette[AVPALETTE_COUNT];
} MmContext;
static av_cold int mm_decode_init(AVCodecContext *avctx)
s->avctx = avctx;
- if (s->avctx->palctrl == NULL) {
- av_log(avctx, AV_LOG_ERROR, "mmvideo: palette expected.\n");
- return -1;
- }
-
avctx->pix_fmt = PIX_FMT_PAL8;
if (avcodec_check_dimensions(avctx, avctx->width, avctx->height))
return 0;
}
+static void mm_decode_pal(MmContext *s, const uint8_t *buf, const uint8_t *buf_end)
+{
+ int i;
+ buf += 4;
+ for (i=0; i<128 && buf+2<buf_end; i++) {
+ s->palette[i] = AV_RB24(buf);
+ s->palette[i+128] = s->palette[i]<<2;
+ buf += 3;
+ }
+}
+
static void mm_decode_intra(MmContext * s, int half_horiz, int half_vert, const uint8_t *buf, int buf_size)
{
int i, x, y;
const uint8_t *buf, int buf_size)
{
MmContext *s = avctx->priv_data;
- AVPaletteControl *palette_control = avctx->palctrl;
+ const uint8_t *buf_end = buf+buf_size;
int type;
- if (palette_control->palette_changed) {
- memcpy(s->frame.data[1], palette_control->palette, AVPALETTE_SIZE);
- palette_control->palette_changed = 0;
- }
-
type = AV_RL16(&buf[0]);
buf += MM_PREAMBLE_SIZE;
buf_size -= MM_PREAMBLE_SIZE;
switch(type) {
+ case MM_TYPE_PALETTE : mm_decode_pal(s, buf, buf_end); return buf_size;
case MM_TYPE_INTRA : mm_decode_intra(s, 0, 0, buf, buf_size); break;
case MM_TYPE_INTRA_HH : mm_decode_intra(s, 1, 0, buf, buf_size); break;
case MM_TYPE_INTRA_HHV : mm_decode_intra(s, 1, 1, buf, buf_size); break;
return -1;
}
+ memcpy(s->frame.data[1], s->palette, AVPALETTE_SIZE);
+
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->frame;
#define MM_PALETTE_SIZE (MM_PALETTE_COUNT*3)
typedef struct {
- AVPaletteControl palette_control;
unsigned int audio_pts, video_pts;
} MmDemuxContext;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->width = width;
st->codec->height = height;
- st->codec->palctrl = &mm->palette_control;
av_set_pts_info(st, 64, 1, frame_rate);
/* audio stream */
av_set_pts_info(st, 64, 1, 8000); /* 8000 hz */
}
- mm->palette_control.palette_changed = 0;
mm->audio_pts = 0;
mm->video_pts = 0;
return 0;
MmDemuxContext *mm = s->priv_data;
ByteIOContext *pb = s->pb;
unsigned char preamble[MM_PREAMBLE_SIZE];
- unsigned char pal[MM_PALETTE_SIZE];
unsigned int type, length;
- int i;
while(1) {
switch(type) {
case MM_TYPE_PALETTE :
- url_fseek(pb, 4, SEEK_CUR); /* unknown data */
- if (get_buffer(pb, pal, MM_PALETTE_SIZE) != MM_PALETTE_SIZE)
- return AVERROR(EIO);
- url_fseek(pb, length - (4 + MM_PALETTE_SIZE), SEEK_CUR);
-
- for (i=0; i<MM_PALETTE_COUNT; i++) {
- int r = pal[i*3 + 0];
- int g = pal[i*3 + 1];
- int b = pal[i*3 + 2];
- mm->palette_control.palette[i] = (r << 16) | (g << 8) | (b);
- /* repeat palette, where each components is multiplied by four */
- mm->palette_control.palette[i+128] = (r << 18) | (g << 10) | (b<<2);
- }
- mm->palette_control.palette_changed = 1;
- break;
-
case MM_TYPE_INTER :
case MM_TYPE_INTRA :
case MM_TYPE_INTRA_HH :
return AVERROR(EIO);
pkt->size = length + MM_PREAMBLE_SIZE;
pkt->stream_index = 0;
- pkt->pts = mm->video_pts++;
+ pkt->pts = mm->video_pts;
+ if (type!=MM_TYPE_PALETTE)
+ mm->video_pts++;
return 0;
case MM_TYPE_AUDIO :