*/
/**
- * @file libavformat/wc3movie.c
+ * @file
* Wing Commander III Movie file demuxer
* by Mike Melanson (melanson@pcisys.net)
* for more information on the WC3 .mve file format, visit:
#define WC3_FRAME_FPS 15
#define PALETTE_SIZE (256 * 3)
-#define PALETTE_COUNT 256
typedef struct Wc3DemuxContext {
int width;
int height;
- unsigned char *palettes;
- int palette_count;
int64_t pts;
int video_stream_index;
int audio_stream_index;
- AVPaletteControl palette_control;
+ AVPacket vpkt;
} Wc3DemuxContext;
-/**
- * palette lookup table that does gamma correction
- *
- * can be calculated by this formula:
- * for i between 0 and 251 inclusive:
- * wc3_pal_lookup[i] = round(pow(i / 256.0, 0.8) * 256);
- * values 252, 253, 254 and 255 are all 0xFD
- * calculating this at runtime should not cause any
- * rounding issues, the maximum difference between
- * the table values and the calculated doubles is
- * about 0.497527
- */
-static const unsigned char wc3_pal_lookup[] = {
- 0x00, 0x03, 0x05, 0x07, 0x09, 0x0B, 0x0D, 0x0E,
- 0x10, 0x12, 0x13, 0x15, 0x16, 0x18, 0x19, 0x1A,
- 0x1C, 0x1D, 0x1F, 0x20, 0x21, 0x23, 0x24, 0x25,
- 0x27, 0x28, 0x29, 0x2A, 0x2C, 0x2D, 0x2E, 0x2F,
- 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x38, 0x39,
- 0x3A, 0x3B, 0x3C, 0x3D, 0x3F, 0x40, 0x41, 0x42,
- 0x43, 0x44, 0x45, 0x46, 0x48, 0x49, 0x4A, 0x4B,
- 0x4C, 0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53,
- 0x54, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x5B, 0x5C,
- 0x5D, 0x5E, 0x5F, 0x60, 0x61, 0x62, 0x63, 0x64,
- 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A, 0x6B, 0x6C,
- 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72, 0x73, 0x74,
- 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C,
- 0x7D, 0x7D, 0x7E, 0x7F, 0x80, 0x81, 0x82, 0x83,
- 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B,
- 0x8C, 0x8D, 0x8D, 0x8E, 0x8F, 0x90, 0x91, 0x92,
- 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x99,
- 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F, 0xA0, 0xA1,
- 0xA2, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8,
- 0xA9, 0xAA, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
- 0xB0, 0xB1, 0xB2, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6,
- 0xB7, 0xB8, 0xB9, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD,
- 0xBE, 0xBF, 0xBF, 0xC0, 0xC1, 0xC2, 0xC3, 0xC4,
- 0xC5, 0xC5, 0xC6, 0xC7, 0xC8, 0xC9, 0xCA, 0xCB,
- 0xCB, 0xCC, 0xCD, 0xCE, 0xCF, 0xD0, 0xD0, 0xD1,
- 0xD2, 0xD3, 0xD4, 0xD5, 0xD5, 0xD6, 0xD7, 0xD8,
- 0xD9, 0xDA, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
- 0xDF, 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE4, 0xE5,
- 0xE6, 0xE7, 0xE8, 0xE9, 0xE9, 0xEA, 0xEB, 0xEC,
- 0xED, 0xED, 0xEE, 0xEF, 0xF0, 0xF1, 0xF1, 0xF2,
- 0xF3, 0xF4, 0xF5, 0xF6, 0xF6, 0xF7, 0xF8, 0xF9,
- 0xFA, 0xFA, 0xFB, 0xFC, 0xFD, 0xFD, 0xFD, 0xFD
-};
-
-
static int wc3_probe(AVProbeData *p)
{
if (p->buf_size < 12)
unsigned int size;
AVStream *st;
int ret = 0;
- int current_palette = 0;
char *buffer;
- int i;
- unsigned char rotate;
/* default context members */
wc3->width = WC3_DEFAULT_WIDTH;
wc3->height = WC3_DEFAULT_HEIGHT;
- wc3->palettes = NULL;
- wc3->palette_count = 0;
wc3->pts = 0;
wc3->video_stream_index = wc3->audio_stream_index = 0;
+ av_init_packet(&wc3->vpkt);
+ wc3->vpkt.data = NULL; wc3->vpkt.size = 0;
/* skip the first 3 32-bit numbers */
url_fseek(pb, 12, SEEK_CUR);
break;
case PC__TAG:
- /* need the number of palettes */
- url_fseek(pb, 8, SEEK_CUR);
- wc3->palette_count = get_le32(pb);
- if((unsigned)wc3->palette_count >= UINT_MAX / PALETTE_SIZE){
- wc3->palette_count= 0;
- return -1;
- }
- wc3->palettes = av_malloc(wc3->palette_count * PALETTE_SIZE);
+ /* number of palettes, unneeded */
+ url_fseek(pb, 12, SEEK_CUR);
break;
case BNAM_TAG:
/* load up the name */
buffer = av_malloc(size+1);
if (!buffer)
- return AVERROR_NOMEM;
+ return AVERROR(ENOMEM);
if ((ret = get_buffer(pb, buffer, size)) != size)
return AVERROR(EIO);
buffer[size] = 0;
case PALT_TAG:
/* one of several palettes */
- if ((unsigned)current_palette >= wc3->palette_count)
- return AVERROR_INVALIDDATA;
- if ((ret = get_buffer(pb,
- &wc3->palettes[current_palette * PALETTE_SIZE],
- PALETTE_SIZE)) != PALETTE_SIZE)
- return AVERROR(EIO);
-
- /* transform the current palette in place */
- for (i = current_palette * PALETTE_SIZE;
- i < (current_palette + 1) * PALETTE_SIZE; i++) {
- /* rotate each palette component left by 2 and use the result
- * as an index into the color component table */
- rotate = ((wc3->palettes[i] << 2) & 0xFF) |
- ((wc3->palettes[i] >> 6) & 0xFF);
- wc3->palettes[i] = wc3_pal_lookup[rotate];
- }
- current_palette++;
+ url_fseek(pb, -8, SEEK_CUR);
+ av_append_packet(pb, &wc3->vpkt, 8 + PALETTE_SIZE);
break;
default:
return AVERROR(ENOMEM);
av_set_pts_info(st, 33, 1, WC3_FRAME_FPS);
wc3->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_XAN_WC3;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->width = wc3->width;
st->codec->height = wc3->height;
- /* palette considerations */
- st->codec->palctrl = &wc3->palette_control;
-
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
av_set_pts_info(st, 33, 1, WC3_FRAME_FPS);
wc3->audio_stream_index = st->index;
- st->codec->codec_type = CODEC_TYPE_AUDIO;
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = CODEC_ID_PCM_S16LE;
st->codec->codec_tag = 1;
st->codec->channels = WC3_AUDIO_CHANNELS;
int packet_read = 0;
int ret = 0;
unsigned char text[1024];
- unsigned int palette_number;
- int i;
- unsigned char r, g, b;
- int base_palette_index;
while (!packet_read) {
case SHOT_TAG:
/* load up new palette */
- palette_number = get_le32(pb);
- if (palette_number >= wc3->palette_count)
- return AVERROR_INVALIDDATA;
- base_palette_index = palette_number * PALETTE_COUNT * 3;
- for (i = 0; i < PALETTE_COUNT; i++) {
- r = wc3->palettes[base_palette_index + i * 3 + 0];
- g = wc3->palettes[base_palette_index + i * 3 + 1];
- b = wc3->palettes[base_palette_index + i * 3 + 2];
- wc3->palette_control.palette[i] = (r << 16) | (g << 8) | (b);
- }
- wc3->palette_control.palette_changed = 1;
+ url_fseek(pb, -8, SEEK_CUR);
+ av_append_packet(pb, &wc3->vpkt, 8 + 4);
break;
case VGA__TAG:
/* send out video chunk */
- ret= av_get_packet(pb, pkt, size);
+ url_fseek(pb, -8, SEEK_CUR);
+ ret= av_append_packet(pb, &wc3->vpkt, 8 + size);
+ // ignore error if we have some data
+ if (wc3->vpkt.size > 0)
+ ret = 0;
+ *pkt = wc3->vpkt;
+ wc3->vpkt.data = NULL; wc3->vpkt.size = 0;
pkt->stream_index = wc3->video_stream_index;
pkt->pts = wc3->pts;
packet_read = 1;
{
Wc3DemuxContext *wc3 = s->priv_data;
- av_free(wc3->palettes);
+ if (wc3->vpkt.size > 0)
+ av_free_packet(&wc3->vpkt);
return 0;
}