69 int mask = 0x10000, bitbuf = 0;
74 segments = bytestream2_get_le32(gb);
75 offset = bytestream2_get_le32(gb);
76 if (segments == 0 && offset == frame_end - frame)
78 if (frame_end - frame <= offset)
84 if (mask == 0x10000) {
85 bitbuf = bytestream2_get_le16u(gb);
88 if (frame_end - frame < 2)
91 v = bytestream2_get_le16(gb);
92 offset = (v & 0x1FFF) << 1;
93 count = ((v >> 13) + 2) << 1;
94 if (frame - frame_start < offset || frame_end - frame < count)
99 *frame++ = bytestream2_get_byte(gb);
100 *frame++ = bytestream2_get_byte(gb);
112 int mask = 0x10000, bitbuf = 0;
115 segments = bytestream2_get_le16(gb);
119 if (mask == 0x10000) {
120 bitbuf = bytestream2_get_le16u(gb);
123 if (frame_end - frame < 2)
126 v = bytestream2_get_le16(gb);
127 offset = (v & 0x1FFF) << 1;
128 count = ((v >> 13) + 2) << 1;
129 if (frame - frame_start < offset || frame_end - frame < count)
133 }
else if (bitbuf & (mask << 1)) {
134 frame += bytestream2_get_le16(gb);
136 *frame++ = bytestream2_get_byte(gb);
137 *frame++ = bytestream2_get_byte(gb);
149 int mask = 0x10000, bitbuf = 0;
152 if ((width | height) & 1)
154 segments = bytestream2_get_le16(gb);
158 if (mask == 0x10000) {
159 bitbuf = bytestream2_get_le16u(gb);
164 v = bytestream2_get_le16(gb);
165 offset = (v & 0x1FFF) << 2;
166 count = ((v >> 13) + 2) << 1;
167 if (frame - frame_start < offset || frame_end - frame < count*2 + width)
169 for (i = 0; i <
count; i++) {
170 frame[0] = frame[1] =
175 }
else if (bitbuf & (mask << 1)) {
176 v = bytestream2_get_le16(gb)*2;
177 if (frame - frame_end < v)
181 if (width < 4 || frame_end - frame < width + 4)
183 frame[0] = frame[1] =
184 frame[
width] = frame[width + 1] = bytestream2_get_byte(gb);
186 frame[0] = frame[1] =
187 frame[
width] = frame[width + 1] = bytestream2_get_byte(gb);
199 int count, lines, segments;
201 count = bytestream2_get_le16(gb);
204 frame += width *
count;
205 lines = bytestream2_get_le16(gb);
206 if (count + lines > height)
214 segments = bytestream2_get_byteu(gb);
216 if (frame - line_ptr <= bytestream2_peek_byte(gb))
218 line_ptr += bytestream2_get_byte(gb);
219 count = (int8_t)bytestream2_get_byte(gb);
221 if (frame - line_ptr < count)
227 if (frame - line_ptr < count)
229 memset(line_ptr, bytestream2_get_byte(gb), count);
242 int count,
i, v, lines, segments;
245 lines = bytestream2_get_le16(gb);
252 segments = bytestream2_get_le16u(gb);
253 while ((segments & 0xC000) == 0xC000) {
254 unsigned skip_lines = -(int16_t)segments;
255 int64_t
delta = -((int16_t)segments * (int64_t)
width);
256 if (frame_end - frame <= delta || y + lines + skip_lines > height)
260 segments = bytestream2_get_le16(gb);
263 if (frame_end <= frame)
265 if (segments & 0x8000) {
266 frame[width - 1] = segments & 0xFF;
267 segments = bytestream2_get_le16(gb);
270 if (frame_end - frame < width)
275 if (frame - line_ptr <= bytestream2_peek_byte(gb))
277 line_ptr += bytestream2_get_byte(gb);
278 count = (int8_t)bytestream2_get_byte(gb);
280 if (frame - line_ptr < count * 2)
284 line_ptr += count * 2;
287 if (frame - line_ptr < count * 2)
289 v = bytestream2_get_le16(gb);
290 for (i = 0; i <
count; i++)
291 bytestream_put_le16(&line_ptr, v);
302 uint32_t segments = bytestream2_get_le32(gb);
308 copy = bytestream2_get_byteu(gb) * 2;
309 skip = bytestream2_get_byteu(gb) * 2;
310 if (frame_end - frame < copy + skip ||
323 memset(frame, 0, width * height);
336 "COPY",
"TSW1",
"BDLT",
"WDLT",
"TDLT",
"DSW1",
"BLCK",
"DDS1" 340 void *
data,
int *got_frame,
347 uint32_t chunk_type, chunk_size;
361 chunk_size = bytestream2_get_le32(&gb);
362 chunk_type = bytestream2_get_le32(&gb);
365 if (chunk_type == 1) {
366 pal_elems =
FFMIN(chunk_size / 3, 256);
367 for (i = 0; i < pal_elems; i++) {
368 s->
pal[
i] = bytestream2_get_be24(&gb) << 2;
369 s->
pal[
i] |= 0xFF
U << 24 | (s->
pal[
i] >> 6) & 0x30303;
372 }
else if (chunk_type <= 9) {
380 "Ignoring unknown chunk type %"PRIu32
"\n",
387 dst = frame->
data[0];
388 for (i = 0; i < avctx->
height; i++) {
389 if(version == 0x100) {
391 for(j = 0; j < avctx->
width; j++) {
392 dst[j] = buf[ (i&3)*(avctx->
width /4) + (j/4) +
396 memcpy(dst, buf, avctx->
width);
401 memcpy(frame->
data[1], s->
pal,
sizeof(s->
pal));
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static void copy(const float *p1, float *p2, const int length)
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
#define AV_LOG_WARNING
Something somehow does not look correct.
Memory handling functions.
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)
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
static av_cold int dfa_decode_end(AVCodecContext *avctx)
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)
#define av_assert0(cond)
assert() equivalent, that is always enabled.
8 bits with AV_PIX_FMT_RGB32 palette
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
void av_memcpy_backptr(uint8_t *dst, int back, int cnt)
Overlapping memcpy() implementation.
static int decode_blck(GetByteContext *gb, uint8_t *frame, int width, int height)
static int dfa_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static int decode_tdlt(GetByteContext *gb, uint8_t *frame, int width, int height)
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
static int decode_dsw1(GetByteContext *gb, uint8_t *frame, int width, int height)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static const uint16_t mask[17]
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
#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)
static const char chunk_name[8][5]
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
static int decode_copy(GetByteContext *gb, uint8_t *frame, int width, int height)
static void frame_end(MpegEncContext *s)
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
static const chunk_decoder decoder[8]
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_cold int dfa_decode_init(AVCodecContext *avctx)
static int decode_bdlt(GetByteContext *gb, uint8_t *frame, int width, int height)
static int decode_dds1(GetByteContext *gb, uint8_t *frame, int width, int height)
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
int(* chunk_decoder)(GetByteContext *gb, uint8_t *frame, int width, int height)
main external API structure.
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
static int frame_start(MpegEncContext *s)
int palette_has_changed
Tell user application that palette has changed from previous frame.
static int decode_wdlt(GetByteContext *gb, uint8_t *frame, int width, int height)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
common internal api header.
static int decode_tsw1(GetByteContext *gb, uint8_t *frame, int width, int height)
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
This structure stores compressed data.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators...