45 while ((c->
high >> 15) - (c->
low >> 15) < 2) {
46 if ((c->
low ^ c->
high) & 0x10000) {
51 c->
high = c->
high << 8 & 0xFFFFFF | 0xFF;
53 c->
low = c->
low << 8 & 0xFFFFFF;
64 int split = (n << 1) - range;
67 return split + (value - split >> 1);
73 int low,
int high,
int n)
75 int split = (n << 1) - range;
78 c->
high = split + (high - split << 1);
85 c->
low += split + (low - split << 1);
92 int range = c->
high - c->
low + 1;
96 if (n << scale > range)
112 int range = c->
high - c->
low + 1, n = *probs;
116 if (n << scale > range)
122 while (probs[++i] > val) ;
125 probs[i] << scale, probs[i - 1] << scale, n);
134 int diff = (c->high >> 16) - (c->low >> 16);
138 while (!(diff & 0x80)) {
143 return (bits + bp + 7 >> 3) + ((c->low >> 16) + 1 == c->high >> 16);
150 c->
value = bytestream2_get_be24(gB);
165 if (ncol > ctx->
free_colours || buf_size < 2 + ncol * 3)
167 for (i = 0; i < ncol; i++)
174 int keyframe,
int w,
int h)
176 int last_symbol = 0, repeat = 0, prev_avail = 0;
179 int x, y, endx, endy,
t;
181 #define READ_PAIR(a, b) \
182 a = bytestream2_get_byte(gB) << 4; \
183 t = bytestream2_get_byte(gB); \
185 b = (t & 0xF) << 8; \
186 b |= bytestream2_get_byte(gB); \
191 if (endx >= w || endy >= h || x > endx || y > endy)
193 dst += x + stride * y;
204 int b = bytestream2_get_byte(gB);
206 last_symbol = b << 8 | bytestream2_get_byte(gB);
210 repeat = (repeat << 8) + bytestream2_get_byte(gB) + 1;
211 if (last_symbol == -2) {
212 int skip =
FFMIN((
unsigned)repeat, dst + w - p);
217 last_symbol = 127 -
b;
219 if (last_symbol >= 0)
221 else if (last_symbol == -1 && prev_avail)
223 }
while (++p < dst + w);
232 uint8_t *rgb_dst,
int rgb_stride, uint32_t *pal,
233 int keyframe,
int kf_slipt,
int slice,
int w,
int h)
239 int current_length = 0, read_codes = 0, next_code = 0, current_codes = 0;
240 int remaining_codes, surplus_codes, i;
242 const int alphabet_size = 270 - keyframe;
244 int last_symbol = 0, repeat = 0, prev_avail = 0;
247 int x, y, clipw, cliph;
254 if (x + clipw > w || y + cliph > h)
256 pal_dst += pal_stride * y + x;
257 rgb_dst += rgb_stride * y + x * 3;
264 pal_dst += pal_stride * kf_slipt;
265 rgb_dst += rgb_stride * kf_slipt;
274 while (current_codes--) {
276 if (symbol >= 204 - keyframe)
277 symbol += 14 - keyframe;
278 else if (symbol > 189)
279 symbol =
get_bits1(gb) + (symbol << 1) - 190;
282 bits[symbol] = current_length;
283 codes[symbol] = next_code++;
288 remaining_codes = (1 << current_length) - next_code;
289 current_codes =
get_bits(gb, av_ceil_log2(remaining_codes + 1));
290 if (current_length > 22 || current_codes > remaining_codes)
292 }
while (current_codes != remaining_codes);
294 remaining_codes = alphabet_size - read_codes;
297 while ((surplus_codes = (2 << current_length) -
298 (next_code << 1) - remaining_codes) < 0) {
304 for (i = 0; i < alphabet_size; i++)
306 if (surplus_codes-- == 0) {
310 bits[i] = current_length;
311 codes[i] = next_code++;
314 if (next_code != 1 << current_length)
317 if (i =
init_vlc(&vlc, 9, alphabet_size, bits, 1, 1, codes, 4, 4, 0))
339 repeat += (1 <<
b) - 1;
341 if (last_symbol == -2) {
342 int skip =
FFMIN(repeat, pal_dst + w - pp);
348 last_symbol = 267 -
b;
350 if (last_symbol >= 0) {
353 }
else if (last_symbol == -1 && prev_avail) {
354 *pp = *(pp - pal_stride);
355 memcpy(rp, rp - rgb_stride, 3);
358 }
while (++pp < pal_dst + w);
359 pal_dst += pal_stride;
360 rgb_dst += rgb_stride;
369 int x,
int y,
int w,
int h,
int wmv9_mask)
404 v->
bits = buf_size * 8;
427 "Asymmetric WMV9 rectangle subsampling");
455 #define MAX_WMV9_RECTANGLES 20
456 #define ARITH2_PADDING 2
462 int buf_size = avpkt->
size;
470 int keyframe, has_wmv9, has_mv, is_rle, is_555, ret;
473 int used_rects = 0, i, implicit_rect = 0,
av_uninit(wmv9_mask);
526 implicit_rect = !arith2_get_bit(&acoder);
528 while (arith2_get_bit(&acoder)) {
531 r = &wmv9rects[used_rects];
536 wmv9rects[used_rects - 1].
x) +
537 wmv9rects[used_rects - 1].
x;
544 if (implicit_rect && used_rects) {
552 wmv9rects[0].
w = avctx->
width;
553 wmv9rects[0].
h = avctx->
height;
557 for (i = 0; i < used_rects; i++) {
558 if (!implicit_rect && arith2_get_bit(&acoder)) {
563 wmv9_mask = arith2_get_bit(&acoder) - 1;
577 if (keyframe && !is_555) {
591 if (c->
mvX < 0 || c->
mvY < 0) {
658 }
else if (!implicit_rect || wmv9_mask != -1) {
690 for (i = 0; i < used_rects; i++) {
691 int x = wmv9rects[i].
x;
692 int y = wmv9rects[i].
y;
693 int w = wmv9rects[i].
w;
694 int h = wmv9rects[i].
h;
695 if (wmv9rects[i].coded) {
696 int WMV9codedFrameSize;
697 if (buf_size < 4 || !(WMV9codedFrameSize =
AV_RL24(buf)))
699 if (ret =
decode_wmv9(avctx, buf + 3, buf_size - 3,
700 x, y, w, h, wmv9_mask))
702 buf += WMV9codedFrameSize + 3;
703 buf_size -= WMV9codedFrameSize + 3;
706 if (wmv9_mask != -1) {
714 memset(dst, 0x80, w * 3);
725 if (c->
mvX < 0 || c->
mvY < 0) {
#define ARITH_GET_BIT(VERSION)
static av_cold int mss2_decode_init(AVCodecContext *avctx)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static int arith2_get_scaled_value(int value, int n, int range)
This structure describes decoded (raw) audio or video data.
static int decode_rle(GetBitContext *gb, uint8_t *pal_dst, int pal_stride, uint8_t *rgb_dst, int rgb_stride, uint32_t *pal, int keyframe, int kf_slipt, int slice, int w, int h)
av_cold int ff_mss12_decode_init(MSS12Context *c, int version, SliceContext *sc1, SliceContext *sc2)
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
#define AV_LOG_WARNING
Something somehow does not look correct.
packed RGB 8:8:8, 24bpp, RGBRGB...
int end_mb_y
end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y) ...
void(* mss2_gray_fill_masked)(uint8_t *dst, int dst_stride, int maskcolor, const uint8_t *mask, int mask_stride, int w, int h)
int max_b_frames
maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 re...
int extended_mv
Ext MV in P/B (not in Simple)
void ff_er_frame_end(ERContext *s)
static void arith2_rescale_interval(ArithCoder *c, int range, int low, int high, int n)
void(* mss2_blit_wmv9)(uint8_t *dst, int dst_stride, const uint8_t *srcy, int srcy_stride, const uint8_t *srcu, const uint8_t *srcv, int srcuv_stride, int w, int h)
int ff_msmpeg4_decode_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)
int fastuvmc
Rounding of qpel vector to hpel ? (not in Simple)
int end_mb_x
Horizontal macroblock limit (used only by mss2)
int frmrtq_postproc
3bits,
int ff_mss12_decode_rect(SliceContext *sc, ArithCoder *acoder, int x, int y, int width, int height)
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
#define av_assert0(cond)
assert() equivalent, that is always enabled.
int res_transtab
reserved, always 0
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
av_cold int ff_vc1_init_common(VC1Context *v)
Init VC-1 specific tables and VC1Context members.
qpel_mc_func(* qpel_put)[16]
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Picture current_picture
copy of the current picture structure.
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
int profile
Sequence header data for all Profiles TODO: choose between ints, uint8_ts and monobit flags...
static int get_bits_count(const GetBitContext *s)
void ff_MPV_frame_end(MpegEncContext *s)
int ff_vc1_decode_end(AVCodecContext *avctx)
Close a VC1/WMV3 decoder.
int(* get_model_sym)(struct ArithCoder *c, Model *m)
static int arith2_get_number(ArithCoder *c, int n)
qpel_mc_func put_qpel_pixels_tab[2][16]
static int arith2_get_prob(ArithCoder *c, int16_t *probs)
static av_cold int wmv9_init(AVCodecContext *avctx)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
av_cold void ff_mss2dsp_init(MSS2DSPContext *dsp)
int res_y411
reserved, old interlaced mode
int overlap
overlapped transforms in use
static int decode_wmv9(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int x, int y, int w, int h, int wmv9_mask)
qpel_mc_func avg_qpel_pixels_tab[2][16]
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
void(* upsample_plane)(uint8_t *plane, int plane_stride, int w, int h)
simple assert() macros that are a bit more flexible than ISO C assert().
void ff_vc1_decode_blocks(VC1Context *v)
void av_log(void *avcl, int level, const char *fmt,...)
const char * name
Name of the codec implementation.
int resync_marker
could this stream contain resync markers
const uint8_t * zz_8x4
Zigzag scan table for TT_8x4 coding mode.
int res_rtm_flag
reserved, set to 1
const uint8_t ff_wmv2_scantableB[64]
static char * split(char *message, char delim)
static void arith2_init(ArithCoder *c, GetByteContext *gB)
void ff_mpeg_flush(AVCodecContext *avctx)
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
const uint8_t * zz_4x8
Zigzag scan table for TT_4x8 coding mode.
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
Identical in function to av_frame_make_writable(), except it uses ff_get_buffer() to allocate the buf...
void ff_mpeg_er_frame_start(MpegEncContext *s)
enum AVPictureType pict_type
Picture type of the frame.
int width
picture width / height.
int ff_vc1_parse_frame_header(VC1Context *v, GetBitContext *gb)
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
static int decode_555(GetByteContext *gB, uint16_t *dst, int stride, int keyframe, int w, int h)
int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx)
generic function called after decoding the header and before a frame is decoded.
static int arith2_get_consumed_bytes(ArithCoder *c)
static av_always_inline int bytestream2_tell(GetByteContext *g)
int rangered
RANGEREDFRM (range reduction) syntax element present at frame level.
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
int finterpflag
INTERPFRM present.
av_cold int ff_mss12_decode_end(MSS12Context *c)
int res_sprite
Simple/Main Profile sequence header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
int multires
frame-level RESPIC syntax element present
main external API structure.
static void close(AVCodecParserContext *s)
const uint8_t ff_wmv2_scantableA[64]
static av_cold int mss2_decode_end(AVCodecContext *avctx)
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
static unsigned int get_bits1(GetBitContext *s)
static void skip_bits(GetBitContext *s, int n)
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
DSPContext dsp
pointers for accelerated dsp functions
uint8_t respic
Frame-level flag for resized images.
int quantizer_mode
2bits, quantizer mode used for sequence, see QUANT_*
int max_b_frames
max number of b-frames for encoding
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
union ArithCoder::@52 gbc
#define MAX_WMV9_RECTANGLES
int vstransform
variable-size [48]x[48] transform type + info
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
static const uint16_t scale[4]
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
qpel_mc_func(* qpel_avg)[16]
void ff_vc1_init_transposed_scantables(VC1Context *v)
struct AVCodecContext * avctx
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
common internal api header.
void ff_mss12_slicecontext_reset(SliceContext *sc)
void(* mss2_blit_wmv9_masked)(uint8_t *dst, int dst_stride, int maskcolor, const uint8_t *mask, int mask_stride, const uint8_t *srcy, int srcy_stride, const uint8_t *srcu, const uint8_t *srcv, int srcuv_stride, int w, int h)
int res_fasttx
reserved, always 1
#define AV_PIX_FMT_RGB555
enum AVDiscard skip_loop_filter
Microsoft Screen 2 (aka Windows Media Video V9 Screen) decoder DSP routines.
static av_cold int init(AVCodecParserContext *s)
VLC_TYPE(* table)[2]
code, bits
int key_frame
1 -> keyframe, 0-> not
static const uint8_t * align_get_bits(GetBitContext *s)
int bitrtq_postproc
5bits, quantized framerate-based postprocessing strength
#define ARITH_GET_MODEL_SYM(VERSION)
static int decode_pal_v2(MSS12Context *ctx, const uint8_t *buf, int buf_size)
int ff_vc1_decode_init_alloc_tables(VC1Context *v)
static void arith2_normalise(ArithCoder *c)
static int mss2_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
int dquant
How qscale varies with MBs, 2bits (not in Simple)
#define FFSWAP(type, a, b)
int(* get_number)(struct ArithCoder *c, int n)
This structure stores compressed data.
void ff_free_vlc(VLC *vlc)
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
av_cold void ff_vc1dsp_init(VC1DSPContext *dsp)
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Common header for Microsoft Screen 1 and 2.