45 #define VMD_HEADER_SIZE 0x330 46 #define PALETTE_COUNT 256 53 const unsigned char *
buf;
63 #define QUEUE_SIZE 0x1000 64 #define QUEUE_MASK 0x0FFF 67 unsigned char *dest,
int dest_len)
73 unsigned int dataleft;
74 unsigned int chainofs;
75 unsigned int chainlen;
84 dataleft = bytestream2_get_le32(&gb);
88 if (bytestream2_peek_le32(&gb) == 0x56781234) {
98 tag = bytestream2_get_byteu(&gb);
99 if ((tag == 0xFF) && (dataleft > 8)) {
102 for (i = 0; i < 8; i++) {
103 queue[qpos++] = *d++ = bytestream2_get_byteu(&gb);
108 for (i = 0; i < 8; i++) {
114 queue[qpos++] = *d++ = bytestream2_get_byteu(&gb);
118 chainofs = bytestream2_get_byte(&gb);
119 chainofs |= ((bytestream2_peek_byte(&gb) & 0xF0) << 4);
120 chainlen = (bytestream2_get_byte(&gb) & 0x0F) + 3;
121 if (chainlen == speclen) {
122 chainlen = bytestream2_get_byte(&gb) + 0xF + 3;
124 if (d_end - d < chainlen)
126 for (j = 0; j < chainlen; j++) {
128 queue[qpos++] = *d++;
131 dataleft -= chainlen;
140 int src_count,
int src_size,
int dest_len)
144 unsigned char *dest_end = dest + dest_len;
153 *pd++ = bytestream2_get_byteu(&gb);
160 l = bytestream2_get_byteu(&gb);
171 for (i = 0; i < l; i++) {
178 }
while (used < src_count);
186 unsigned int *palette32;
187 unsigned char r,
g,
b;
197 int frame_x, frame_y;
198 int frame_width, frame_height;
202 frame_width =
AV_RL16(&s->
buf[10]) - frame_x + 1;
203 frame_height =
AV_RL16(&s->
buf[12]) - frame_y + 1;
206 (frame_x || frame_y)) {
214 if (frame_x < 0 || frame_width < 0 ||
219 "Invalid horizontal range %d-%d\n",
220 frame_x, frame_width);
223 if (frame_y < 0 || frame_height < 0 ||
228 "Invalid vertical range %d-%d\n",
229 frame_y, frame_height);
236 (frame_x || frame_y || (frame_width != s->
avctx->
width) ||
245 if (s->
buf[15] & 0x02) {
247 palette32 = (
unsigned int *)s->
palette;
250 r = bytestream2_get_byteu(&gb) * 4;
251 g = bytestream2_get_byteu(&gb) * 4;
252 b = bytestream2_get_byteu(&gb) * 4;
253 palette32[
i] = 0xFF
U << 24 | (r << 16) | (g << 8) | (
b);
254 palette32[
i] |= palette32[
i] >> 6 & 0x30303;
268 meth = bytestream2_get_byteu(&gb);
273 "Trying to unpack LZ-compressed frame with no LZ buffer\n");
284 dp = &frame->
data[0][frame_y * frame->
linesize[0] + frame_x];
288 for (i = 0; i < frame_height; i++) {
291 len = bytestream2_get_byte(&gb);
293 len = (len & 0x7F) + 1;
294 if (ofs + len > frame_width ||
303 memcpy(&dp[ofs], &pp[ofs], len + 1);
306 }
while (ofs < frame_width);
307 if (ofs > frame_width) {
309 "offset > width (%d > %d)\n",
319 for (i = 0; i < frame_height; i++) {
327 for (i = 0; i < frame_height; i++) {
330 len = bytestream2_get_byte(&gb);
332 len = (len & 0x7F) + 1;
333 if (bytestream2_peek_byte(&gb) == 0xFF) {
335 bytestream2_get_byte(&gb);
342 if (ofs + len > frame_width ||
352 memcpy(&dp[ofs], &pp[ofs], len + 1);
355 }
while (ofs < frame_width);
356 if (ofs > frame_width) {
358 "offset > width (%d > %d)\n",
385 unsigned int *palette32;
386 int palette_index = 0;
387 unsigned char r,
g,
b;
388 unsigned char *vmd_header;
389 unsigned char *raw_palette;
400 vmd_header = (
unsigned char *)avctx->
extradata;
410 raw_palette = &vmd_header[28];
411 palette32 = (
unsigned int *)s->
palette;
413 r = raw_palette[palette_index++] * 4;
414 g = raw_palette[palette_index++] * 4;
415 b = raw_palette[palette_index++] * 4;
416 palette32[
i] = 0xFF
U << 24 | (r << 16) | (g << 8) | (
b);
417 palette32[
i] |= palette32[
i] >> 6 & 0x30303;
430 void *
data,
int *got_frame,
434 int buf_size = avpkt->
size;
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
static av_cold int init(AVCodecContext *avctx)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
static av_always_inline unsigned int bytestream2_get_bufferu(GetByteContext *g, uint8_t *dst, unsigned int size)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
8 bits with AV_PIX_FMT_RGB32 palette
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
AVCodec ff_vmdvideo_decoder
unsigned char * unpack_buffer
static av_always_inline void bytestream2_skipu(GetByteContext *g, unsigned int size)
static int vmdvideo_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
unsigned char palette[PALETTE_COUNT *4]
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
static av_cold int vmdvideo_decode_end(AVCodecContext *avctx)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define bytestream2_get_ne16
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
const unsigned char * buf
const char * name
Name of the codec implementation.
static int vmd_decode(VmdVideoContext *s, AVFrame *frame)
static av_cold int vmdvideo_decode_init(AVCodecContext *avctx)
int width
picture width / height.
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
static av_always_inline int bytestream2_tell(GetByteContext *g)
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
common internal api header.
common internal and external API header
static int rle_unpack(const unsigned char *src, unsigned char *dest, int src_count, int src_size, int dest_len)
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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
This structure stores compressed data.
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
static int lz_unpack(const unsigned char *src, int src_len, unsigned char *dest, int dest_len)