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70 int mask = 0x10000, bitbuf = 0;
75 segments = bytestream2_get_le32(gb);
76 offset = bytestream2_get_le32(gb);
85 if (
mask == 0x10000) {
86 bitbuf = bytestream2_get_le16u(gb);
92 v = bytestream2_get_le16(gb);
93 offset = (v & 0x1FFF) << 1;
94 count = ((v >> 13) + 2) << 1;
100 *
frame++ = bytestream2_get_byte(gb);
101 *
frame++ = bytestream2_get_byte(gb);
113 int mask = 0x10000, bitbuf = 0;
114 int v,
offset, count, segments;
116 segments = bytestream2_get_le16(gb);
120 if (
mask == 0x10000) {
121 bitbuf = bytestream2_get_le16u(gb);
127 v = bytestream2_get_le16(gb);
128 offset = (v & 0x1FFF) << 1;
129 count = ((v >> 13) + 2) << 1;
134 }
else if (bitbuf & (
mask << 1)) {
135 frame += bytestream2_get_le16(gb);
137 *
frame++ = bytestream2_get_byte(gb);
138 *
frame++ = bytestream2_get_byte(gb);
150 int mask = 0x10000, bitbuf = 0;
151 int i, v,
offset, count, segments;
155 segments = bytestream2_get_le16(gb);
159 if (
mask == 0x10000) {
160 bitbuf = bytestream2_get_le16u(gb);
165 v = bytestream2_get_le16(gb);
166 offset = (v & 0x1FFF) << 2;
167 count = ((v >> 13) + 2) << 1;
170 for (
i = 0;
i < count;
i++) {
176 }
else if (bitbuf & (
mask << 1)) {
177 v = bytestream2_get_le16(gb)*2;
200 int count, lines, segments;
202 count = bytestream2_get_le16(gb);
206 lines = bytestream2_get_le16(gb);
207 if (count + lines >
height)
215 segments = bytestream2_get_byteu(gb);
217 if (
frame - line_ptr <= bytestream2_peek_byte(gb))
219 line_ptr += bytestream2_get_byte(gb);
220 count = (int8_t)bytestream2_get_byte(gb);
222 if (
frame - line_ptr < count)
228 if (
frame - line_ptr < count)
230 memset(line_ptr, bytestream2_get_byte(gb), count);
243 int count,
i, v, lines, segments;
246 lines = bytestream2_get_le16(gb);
253 segments = bytestream2_get_le16u(gb);
254 while ((segments & 0xC000) == 0xC000) {
255 unsigned skip_lines = -(int16_t)segments;
261 segments = bytestream2_get_le16(gb);
266 if (segments & 0x8000) {
268 segments = bytestream2_get_le16(gb);
276 if (
frame - line_ptr <= bytestream2_peek_byte(gb))
278 line_ptr += bytestream2_get_byte(gb);
279 count = (int8_t)bytestream2_get_byte(gb);
281 if (
frame - line_ptr < count * 2)
285 line_ptr += count * 2;
288 if (
frame - line_ptr < count * 2)
290 v = bytestream2_get_le16(gb);
291 for (
i = 0;
i < count;
i++)
292 bytestream_put_le16(&line_ptr, v);
303 uint32_t segments = bytestream2_get_le32(gb);
309 copy = bytestream2_get_byteu(gb) * 2;
310 skip = bytestream2_get_byteu(gb) * 2;
337 "COPY",
"TSW1",
"BDLT",
"WDLT",
"TDLT",
"DSW1",
"BLCK",
"DDS1"
345 const uint8_t *buf = avpkt->
data;
346 uint32_t chunk_type, chunk_size;
360 chunk_size = bytestream2_get_le32(&gb);
361 chunk_type = bytestream2_get_le32(&gb);
364 if (chunk_type == 1) {
365 pal_elems =
FFMIN(chunk_size / 3, 256);
366 for (
i = 0;
i < pal_elems;
i++) {
367 s->pal[
i] = bytestream2_get_be24(&gb) << 2;
368 s->pal[
i] |= 0xFF
U << 24 | (
s->pal[
i] >> 6) & 0x30303;
370 #if FF_API_PALETTE_HAS_CHANGED
372 frame->palette_has_changed = 1;
375 }
else if (chunk_type <= 9) {
383 "Ignoring unknown chunk type %"PRIu32
"\n",
394 const uint8_t *buf1 = buf + (
i&3)*(avctx->
width/4) + (
i/4)*avctx->
width;
396 for(j = 0; j < avctx->
width/4; j++) {
403 for(; j < avctx->
width; j++) {
412 memcpy(
frame->data[1],
s->pal,
sizeof(
s->pal));
#define FF_ENABLE_DEPRECATION_WARNINGS
#define AV_LOG_WARNING
Something somehow does not look correct.
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_cold int dfa_decode_init(AVCodecContext *avctx)
static int decode_wdlt(GetByteContext *gb, uint8_t *frame, int width, int height)
This structure describes decoded (raw) audio or video data.
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
static const chunk_decoder decoder[8]
AVCodec p
The public AVCodec.
static void frame_start(MpegEncContext *s)
static int64_t frame_end(const SyncQueue *sq, SyncQueueFrame frame, int nb_samples)
Compute the end timestamp of a frame.
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.
void av_memcpy_backptr(uint8_t *dst, int back, int cnt)
Overlapping memcpy() implementation.
#define FF_CODEC_DECODE_CB(func)
#define av_assert0(cond)
assert() equivalent, that is always enabled.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
static int decode_tsw1(GetByteContext *gb, uint8_t *frame, int width, int height)
static int decode_tdlt(GetByteContext *gb, uint8_t *frame, int width, int height)
#define CODEC_LONG_NAME(str)
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
static int decode_bdlt(GetByteContext *gb, uint8_t *frame, int width, int height)
static av_always_inline int bytestream2_get_bytes_left(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.
static void copy(const float *p1, float *p2, const int length)
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
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
static int dfa_decode_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *avpkt)
static const char chunk_name[8][5]
#define i(width, name, range_min, range_max)
uint8_t * extradata
Out-of-band global headers that may be used by some codecs.
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
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
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
main external API structure.
static av_cold int dfa_decode_end(AVCodecContext *avctx)
#define FF_DISABLE_DEPRECATION_WARNINGS
This structure stores compressed data.
int width
picture width / height.
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.
const FFCodec ff_dfa_decoder
int(* chunk_decoder)(GetByteContext *gb, uint8_t *frame, int width, int height)
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 int decode_blck(GetByteContext *gb, uint8_t *frame, int width, int height)
static void BS_FUNC() skip(BSCTX *bc, unsigned int n)
Skip n bits in the buffer.
static int decode_dds1(GetByteContext *gb, uint8_t *frame, int width, int height)
static int decode_copy(GetByteContext *gb, uint8_t *frame, int width, int height)