35 #define KMVC_KEYFRAME 0x80
36 #define KMVC_PALETTE 0x40
37 #define KMVC_METHOD 0x0F
38 #define MAX_PALSIZE 256
59 #define BLK(data, x, y) data[av_clip((x) + (y) * 320, 0, 320 * 200 -1)]
61 #define kmvc_init_getbits(bb, g) bb.bits = 7; bb.bitbuf = bytestream2_get_byte(g);
63 #define kmvc_getbit(bb, g, res) {\
65 if (bb.bitbuf & (1 << bb.bits)) res = 1; \
68 bb.bitbuf = bytestream2_get_byte(g); \
79 int l0x, l1x, l0y, l1y;
84 for (by = 0; by <
h; by += 8)
85 for (bx = 0; bx <
w; bx += 8) {
92 val = bytestream2_get_byte(&
ctx->g);
93 for (
i = 0;
i < 64;
i++)
96 for (
i = 0;
i < 4;
i++) {
97 l0x = bx + (
i & 1) * 4;
98 l0y = by + (
i & 2) * 2;
103 val = bytestream2_get_byte(&
ctx->g);
104 for (j = 0; j < 16; j++)
105 BLK(
ctx->cur, l0x + (j & 3), l0y + (j >> 2)) =
val;
107 val = bytestream2_get_byte(&
ctx->g);
110 if ((l0x-mx) + 320*(l0y-my) < 0 || (l0x-mx) + 320*(l0y-my) > 320*197 - 4) {
114 for (j = 0; j < 16; j++)
115 BLK(
ctx->cur, l0x + (j & 3), l0y + (j >> 2)) =
116 BLK(
ctx->cur, l0x + (j & 3) - mx, l0y + (j >> 2) - my);
119 for (j = 0; j < 4; j++) {
120 l1x = l0x + (j & 1) * 2;
126 val = bytestream2_get_byte(&
ctx->g);
132 val = bytestream2_get_byte(&
ctx->g);
135 if ((l1x-mx) + 320*(l1y-my) < 0 || (l1x-mx) + 320*(l1y-my) > 320*199 - 2) {
139 BLK(
ctx->cur, l1x, l1y) =
BLK(
ctx->cur, l1x - mx, l1y - my);
140 BLK(
ctx->cur, l1x + 1, l1y) =
141 BLK(
ctx->cur, l1x + 1 - mx, l1y - my);
142 BLK(
ctx->cur, l1x, l1y + 1) =
143 BLK(
ctx->cur, l1x - mx, l1y + 1 - my);
144 BLK(
ctx->cur, l1x + 1, l1y + 1) =
145 BLK(
ctx->cur, l1x + 1 - mx, l1y + 1 - my);
148 BLK(
ctx->cur, l1x, l1y) = bytestream2_get_byte(&
ctx->g);
149 BLK(
ctx->cur, l1x + 1, l1y) = bytestream2_get_byte(&
ctx->g);
150 BLK(
ctx->cur, l1x, l1y + 1) = bytestream2_get_byte(&
ctx->g);
151 BLK(
ctx->cur, l1x + 1, l1y + 1) = bytestream2_get_byte(&
ctx->g);
168 int l0x, l1x, l0y, l1y;
173 for (by = 0; by <
h; by += 8)
174 for (bx = 0; bx <
w; bx += 8) {
183 val = bytestream2_get_byte(&
ctx->g);
184 for (
i = 0;
i < 64;
i++)
185 BLK(
ctx->cur, bx + (
i & 0x7), by + (
i >> 3)) =
val;
187 for (
i = 0;
i < 64;
i++)
188 BLK(
ctx->cur, bx + (
i & 0x7), by + (
i >> 3)) =
189 BLK(
ctx->prev, bx + (
i & 0x7), by + (
i >> 3));
196 for (
i = 0;
i < 4;
i++) {
197 l0x = bx + (
i & 1) * 4;
198 l0y = by + (
i & 2) * 2;
203 val = bytestream2_get_byte(&
ctx->g);
204 for (j = 0; j < 16; j++)
205 BLK(
ctx->cur, l0x + (j & 3), l0y + (j >> 2)) =
val;
207 val = bytestream2_get_byte(&
ctx->g);
208 mx = (
val & 0xF) - 8;
210 if ((l0x+mx) + 320*(l0y+my) < 0 || (l0x+mx) + 320*(l0y+my) > 320*197 - 4) {
214 for (j = 0; j < 16; j++)
215 BLK(
ctx->cur, l0x + (j & 3), l0y + (j >> 2)) =
216 BLK(
ctx->prev, l0x + (j & 3) + mx, l0y + (j >> 2) + my);
219 for (j = 0; j < 4; j++) {
220 l1x = l0x + (j & 1) * 2;
226 val = bytestream2_get_byte(&
ctx->g);
232 val = bytestream2_get_byte(&
ctx->g);
233 mx = (
val & 0xF) - 8;
235 if ((l1x+mx) + 320*(l1y+my) < 0 || (l1x+mx) + 320*(l1y+my) > 320*199 - 2) {
239 BLK(
ctx->cur, l1x, l1y) =
BLK(
ctx->prev, l1x + mx, l1y + my);
240 BLK(
ctx->cur, l1x + 1, l1y) =
241 BLK(
ctx->prev, l1x + 1 + mx, l1y + my);
242 BLK(
ctx->cur, l1x, l1y + 1) =
243 BLK(
ctx->prev, l1x + mx, l1y + 1 + my);
244 BLK(
ctx->cur, l1x + 1, l1y + 1) =
245 BLK(
ctx->prev, l1x + 1 + mx, l1y + 1 + my);
248 BLK(
ctx->cur, l1x, l1y) = bytestream2_get_byte(&
ctx->g);
249 BLK(
ctx->cur, l1x + 1, l1y) = bytestream2_get_byte(&
ctx->g);
250 BLK(
ctx->cur, l1x, l1y + 1) = bytestream2_get_byte(&
ctx->g);
251 BLK(
ctx->cur, l1x + 1, l1y + 1) = bytestream2_get_byte(&
ctx->g);
282 if (bytestream2_peek_byte(&
ctx->g) == 127) {
284 for (
i = 0;
i < 127;
i++) {
285 ctx->pal[
i + (
header & 0x81)] = 0xFFU << 24 | bytestream2_get_be24(&
ctx->g);
302 for (
i = 1;
i <=
ctx->palsize;
i++) {
303 ctx->pal[
i] = 0xFFU << 24 | bytestream2_get_be24(&
ctx->g);
322 blocksize = bytestream2_get_byte(&
ctx->g);
324 if (blocksize != 8 && blocksize != 127) {
328 memset(
ctx->cur, 0, 320 * 200);
332 memcpy(
ctx->cur,
ctx->prev, 320 * 200);
354 if (
ctx->cur ==
ctx->frm0) {
388 for (
i = 0;
i < 256;
i++) {
389 c->pal[
i] = 0xFFU << 24 |
i * 0x10101;
394 "Extradata missing, decoding may not work properly...\n");
407 for (
i = 0;
i < 256;
i++) {
static double val(void *priv, double ch)
Libavcodec external API header.
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, buffer_size_t *size)
static av_cold int init(AVCodecContext *avctx)
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
static av_always_inline int bytestream2_seek(GetByteContext *g, int offset, int whence)
common internal and external API header
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
@ AV_PKT_DATA_PALETTE
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
#define AV_LOG_WARNING
Something somehow does not look correct.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
@ AV_PICTURE_TYPE_I
Intra.
@ AV_PICTURE_TYPE_P
Predicted.
static int kmvc_decode_intra_8x8(KmvcContext *ctx, int w, int h)
#define kmvc_getbit(bb, g, res)
static av_cold int decode_init(AVCodecContext *avctx)
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
#define kmvc_init_getbits(bb, g)
static int kmvc_decode_inter_8x8(KmvcContext *ctx, int w, int h)
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
static const uint8_t header[24]
main external API structure.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
int width
picture width / height.
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
const char * name
Name of the codec implementation.
This structure describes decoded (raw) audio or video data.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
int key_frame
1 -> keyframe, 0-> not
int palette_has_changed
Tell user application that palette has changed from previous frame.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
enum AVPictureType pict_type
Picture type of the frame.
This structure stores compressed data.
uint32_t pal[MAX_PALSIZE]