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47 #define VMD_HEADER_SIZE 0x330
48 #define PALETTE_COUNT 256
55 const unsigned char *
buf;
65 #define QUEUE_SIZE 0x1000
66 #define QUEUE_MASK 0x0FFF
69 unsigned char *dest,
int dest_len)
75 unsigned int dataleft;
76 unsigned int chainofs;
77 unsigned int chainlen;
86 dataleft = bytestream2_get_le32(&gb);
90 if (bytestream2_peek_le32(&gb) == 0x56781234) {
100 tag = bytestream2_get_byteu(&gb);
101 if ((
tag == 0xFF) && (dataleft > 8)) {
104 for (
i = 0;
i < 8;
i++) {
105 queue[qpos++] = *d++ = bytestream2_get_byteu(&gb);
110 for (
i = 0;
i < 8;
i++) {
116 queue[qpos++] = *d++ = bytestream2_get_byteu(&gb);
120 chainofs = bytestream2_get_byte(&gb);
121 chainofs |= ((bytestream2_peek_byte(&gb) & 0xF0) << 4);
122 chainlen = (bytestream2_get_byte(&gb) & 0x0F) + 3;
123 if (chainlen == speclen) {
124 chainlen = bytestream2_get_byte(&gb) + 0xF + 3;
126 if (d_end - d < chainlen)
128 for (j = 0; j < chainlen; j++) {
130 queue[qpos++] = *d++;
133 dataleft -= chainlen;
142 int src_count,
int src_size,
int dest_len)
146 unsigned char *dest_end = dest + dest_len;
155 *pd++ = bytestream2_get_byteu(&gb);
162 l = bytestream2_get_byteu(&gb);
173 for (
i = 0;
i < l;
i++) {
180 }
while (used < src_count);
188 unsigned int *palette32;
189 unsigned char r,
g,
b;
199 int frame_x, frame_y, prev_linesize;
200 int frame_width, frame_height;
204 frame_width =
AV_RL16(&
s->buf[10]) - frame_x + 1;
205 frame_height =
AV_RL16(&
s->buf[12]) - frame_y + 1;
207 if ((frame_width ==
s->avctx->width && frame_height ==
s->avctx->height) &&
208 (frame_x || frame_y)) {
216 if (frame_x < 0 || frame_width < 0 ||
217 frame_x >=
s->avctx->width ||
218 frame_width >
s->avctx->width ||
219 frame_x + frame_width >
s->avctx->width) {
221 "Invalid horizontal range %d-%d\n",
222 frame_x, frame_width);
225 if (frame_y < 0 || frame_height < 0 ||
226 frame_y >=
s->avctx->height ||
227 frame_height >
s->avctx->height ||
228 frame_y + frame_height >
s->avctx->height) {
230 "Invalid vertical range %d-%d\n",
231 frame_y, frame_height);
237 if (
s->prev_frame->data[0] &&
238 (frame_x || frame_y || (frame_width !=
s->avctx->width) ||
239 (frame_height !=
s->avctx->height))) {
241 memcpy(
frame->data[0],
s->prev_frame->data[0],
242 s->avctx->height *
frame->linesize[0]);
247 if (
s->buf[15] & 0x02) {
249 palette32 = (
unsigned int *)
s->palette;
252 r = bytestream2_get_byteu(&gb) * 4;
253 g = bytestream2_get_byteu(&gb) * 4;
254 b = bytestream2_get_byteu(&gb) * 4;
255 palette32[
i] = 0xFF
U << 24 | (
r << 16) | (
g << 8) | (
b);
256 palette32[
i] |= palette32[
i] >> 6 & 0x30303;
270 meth = bytestream2_get_byteu(&gb);
273 if (!
s->unpack_buffer_size) {
275 "Trying to unpack LZ-compressed frame with no LZ buffer\n");
279 s->unpack_buffer,
s->unpack_buffer_size);
286 dp = &
frame->data[0][frame_y *
frame->linesize[0] + frame_x];
287 if (
s->prev_frame->data[0]) {
288 prev_linesize =
s->prev_frame->linesize[0];
289 pp =
s->prev_frame->data[0] + frame_y * prev_linesize + frame_x;
296 for (
i = 0;
i < frame_height;
i++) {
299 len = bytestream2_get_byte(&gb);
302 if (ofs +
len > frame_width ||
309 if (ofs +
len + 1 > frame_width || !pp)
311 memcpy(&dp[ofs], &pp[ofs],
len + 1);
314 }
while (ofs < frame_width);
315 if (ofs > frame_width) {
317 "offset > width (%d > %d)\n",
321 dp +=
frame->linesize[0];
327 for (
i = 0;
i < frame_height;
i++) {
329 dp +=
frame->linesize[0];
334 for (
i = 0;
i < frame_height;
i++) {
337 len = bytestream2_get_byte(&gb);
340 if (bytestream2_peek_byte(&gb) == 0xFF) {
342 bytestream2_get_byte(&gb);
349 if (ofs +
len > frame_width ||
357 if (ofs +
len + 1 > frame_width || !pp)
359 memcpy(&dp[ofs], &pp[ofs],
len + 1);
362 }
while (ofs < frame_width);
363 if (ofs > frame_width) {
365 "offset > width (%d > %d)\n",
369 dp +=
frame->linesize[0];
383 s->unpack_buffer_size = 0;
392 unsigned int *palette32;
393 int palette_index = 0;
394 unsigned char r,
g,
b;
395 unsigned char *vmd_header;
396 unsigned char *raw_palette;
407 vmd_header = (
unsigned char *)avctx->
extradata;
409 s->unpack_buffer_size =
AV_RL32(&vmd_header[800]);
410 if (
s->unpack_buffer_size) {
411 s->unpack_buffer =
av_malloc(
s->unpack_buffer_size);
412 if (!
s->unpack_buffer)
417 raw_palette = &vmd_header[28];
418 palette32 = (
unsigned int *)
s->palette;
420 r = raw_palette[palette_index++] * 4;
421 g = raw_palette[palette_index++] * 4;
422 b = raw_palette[palette_index++] * 4;
423 palette32[
i] = 0xFF
U << 24 | (
r << 16) | (
g << 8) | (
b);
424 palette32[
i] |= palette32[
i] >> 6 & 0x30303;
437 const uint8_t *buf = avpkt->
data;
438 int buf_size = avpkt->
size;
468 .
p.
name =
"vmdvideo",
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
static av_always_inline void bytestream2_skipu(GetByteContext *g, unsigned int size)
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
This structure describes decoded (raw) audio or video data.
static av_cold int vmdvideo_decode_end(AVCodecContext *avctx)
unsigned char palette[PALETTE_COUNT *4]
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
AVCodec p
The public AVCodec.
unsigned char * unpack_buffer
const unsigned char * buf
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define FF_CODEC_DECODE_CB(func)
static int rle_unpack(const unsigned char *src, unsigned char *dest, int src_count, int src_size, int dest_len)
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
#define CODEC_LONG_NAME(str)
#define FF_PTR_ADD(ptr, off)
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
static av_always_inline int bytestream2_tell(GetByteContext *g)
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
int(* init)(AVBSFContext *ctx)
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
#define bytestream2_get_ne16
#define i(width, name, range_min, range_max)
uint8_t * extradata
Out-of-band global headers that may be used by some codecs.
const char * name
Name of the codec implementation.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
static int lz_unpack(const unsigned char *src, int src_len, unsigned char *dest, int dest_len)
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
int av_frame_replace(AVFrame *dst, const AVFrame *src)
Ensure the destination frame refers to the same data described by the source frame,...
main external API structure.
static av_always_inline unsigned int bytestream2_get_bufferu(GetByteContext *g, uint8_t *dst, unsigned int size)
This structure stores compressed data.
static int vmd_decode(VmdVideoContext *s, AVFrame *frame)
const FFCodec ff_vmdvideo_decoder
static av_cold int vmdvideo_decode_init(AVCodecContext *avctx)
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static int vmdvideo_decode_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)