55 for (i = e - 1; i >= 0; i--)
58 e = -(is_signed &&
get_rac(c, state + 11 +
FFMIN(e, 10)));
75 while (i < state->error_sum) {
83 av_dlog(
NULL,
"v:%d bias:%d error:%d drift:%d count:%d k:%d",
87 if (k == 0 && 2 * state->
drift <= -state->
count)
90 v ^= ((2 * state->
drift + state->
count) >> 31);
102 int plane_index,
int bits)
111 for (x = 0; x < w; x++) {
112 int diff, context, sign;
114 context =
get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);
126 if (context == 0 && run_mode == 0)
130 if (run_count == 0 && run_mode == 1) {
133 if (x + run_count <= w)
158 av_dlog(s->
avctx,
"count:%d index:%d, mode:%d, x:%d pos:%d\n",
165 sample[1][x] = (
predict(sample[1] + x, sample[0] + x) + diff) &
172 int w,
int h,
int stride,
int plane_index)
183 for (y = 0; y < h; y++) {
184 int16_t *temp = sample[0];
186 sample[0] = sample[1];
189 sample[1][-1] = sample[0][0];
190 sample[0][w] = sample[0][w - 1];
195 for (x = 0; x < w; x++)
196 src[x + stride * y] = sample[1][x];
201 for (x = 0; x < w; x++)
202 ((uint16_t *)(src + stride * y))[x] = sample[1][x];
204 for (x = 0; x < w; x++)
221 int offset = 1 <<
bits;
223 for (x = 0; x < 4; x++) {
232 for (y = 0; y < h; y++) {
234 int16_t *temp = sample[p][0];
236 sample[p][0] = sample[p][1];
239 sample[p][1][-1] = sample[p][0][0];
240 sample[p][0][w] = sample[p][0][w - 1];
244 decode_line(s, w, sample[p], (p + 1) / 2, bits + 1);
246 for (x = 0; x < w; x++) {
247 int g = sample[0][1][x];
248 int b = sample[1][1][x];
249 int r = sample[2][1][x];
250 int a = sample[3][1][x];
259 *((uint32_t *)(src[0] + x * 4 + stride[0] * y)) = b +
260 (g << 8) + (r << 16) + (a << 24);
262 *((uint16_t *)(src[0] + x * 2 + stride[0] * y)) = b;
263 *((uint16_t *)(src[1] + x * 2 + stride[1] * y)) = g;
264 *((uint16_t *)(src[2] + x * 2 + stride[2] * y)) = r;
275 memset(state, 128,
sizeof(state));
278 for (i = 1; i < 256; i++) {
322 }
else if (ps == 2) {
325 }
else if (ps == 3) {
380 chroma_width, chroma_height, p->
linesize[1],
383 chroma_width, chroma_height, p->
linesize[2],
418 memset(state, 128,
sizeof(state));
420 for (v = 0; i < 128; v++) {
427 quant_table[i] = scale * v;
432 for (i = 1; i < 128; i++)
433 quant_table[256 - i] = -quant_table[i];
434 quant_table[128] = -quant_table[127];
445 for (i = 0; i < 5; i++) {
447 if (context_count > 32768
U) {
451 return (context_count + 1) / 2;
461 memset(state2, 128,
sizeof(state2));
462 memset(state, 128,
sizeof(state));
475 for (i = 1; i < 256; i++)
542 memset(state, 128,
sizeof(state));
549 "invalid version %d in version 1 header\n", v);
557 for (i = 1; i < 256; i++)
564 chroma_planes =
get_rac(c, state);
567 transparency =
get_rac(c, state);
687 "chroma subsampling not supported in this colorspace\n");
703 "bit depth %d not supported\n",
716 if (context_count < 0) {
727 int trailer = 3 + 5 * !!f->
ec;
775 "quant_table_index out of range\n");
823 int buf_size = avpkt->
size;
846 "Cannot decode non-keyframe without valid keyframe\n");
859 "ver:%d keyframe:%d coder:%d ec:%d slices:%d bps:%d\n",
863 buf_p = buf + buf_size;
866 int trailer = 3 + 5 * !!f->
ec;
870 v =
AV_RB24(buf_p - trailer) + trailer;
905 for (j = 0; j < 4; j++) {
static av_always_inline int fold(int diff, int bits)
int ffv1_allocate_initial_states(FFV1Context *f)
const uint8_t ff_log2_run[41]
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
This structure describes decoded (raw) audio or video data.
uint32_t av_crc(const AVCRC *ctx, uint32_t crc, const uint8_t *buffer, size_t length)
Calculate the CRC of a block.
av_cold int ffv1_common_init(AVCodecContext *avctx)
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
int16_t quant_table[MAX_CONTEXT_INPUTS][256]
int ffv1_init_slice_state(FFV1Context *f, FFV1Context *fs)
static int decode_slice(AVCodecContext *c, void *arg)
#define MAX_CONTEXT_INPUTS
#define AV_PIX_FMT_GBRP10
static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
static av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state, int is_signed)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
av_dlog(ac->avr,"%d samples - audio_convert: %s to %s (%s)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic?ac->func_descr_generic:ac->func_descr)
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
static av_always_inline void predict(PredictorState *ps, float *coef, int output_enable)
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.
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
static int read_quant_tables(RangeCoder *c, int16_t quant_table[MAX_CONTEXT_INPUTS][256])
static int get_rac(RangeCoder *c, uint8_t *const state)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
#define FF_DEBUG_PICT_INFO
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.
uint8_t(*[MAX_QUANT_TABLES] initial_states)[32]
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
static av_cold int ffv1_decode_close(AVCodecContext *avctx)
static int get_bits_count(const GetBitContext *s)
bitstream reader API header.
#define AV_PIX_FMT_YUV444P16
static void decode_rgb_frame(FFV1Context *s, uint8_t *src[3], int w, int h, int stride[3])
int interlaced_frame
The content of the picture is interlaced.
high precision timer, useful to profile code
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static int decode_slice_header(FFV1Context *f, FFV1Context *fs)
int16_t quant_tables[MAX_QUANT_TABLES][MAX_CONTEXT_INPUTS][256]
static int ffv1_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
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. ...
static av_cold int ffv1_decode_init(AVCodecContext *avctx)
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
simple assert() macros that are a bit more flexible than ISO C assert().
void av_log(void *avcl, int level, const char *fmt,...)
const char * name
Name of the codec implementation.
#define AV_PIX_FMT_YUV444P10
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4], const uint8_t *src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Copy image in src_data to dst_data.
static int get_vlc_symbol(GetBitContext *gb, VlcState *const state, int bits)
static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index)
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
int16_t quant_table[MAX_CONTEXT_INPUTS][256]
#define AV_PIX_FMT_YUV422P9
static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)
uint8_t state_transition[256]
enum AVPictureType pict_type
Picture type of the frame.
#define AV_PIX_FMT_GRAY16
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
static float quant_table[96]
static int get_context(PlaneContext *p, int16_t *src, int16_t *last, int16_t *last2)
static void update_vlc_state(VlcState *const state, const int v)
void ff_build_rac_states(RangeCoder *c, int factor, int max_p)
static av_always_inline void decode_line(FFV1Context *s, int w, int16_t *sample[2], int plane_index, int bits)
#define AV_PIX_FMT_YUV444P9
av_cold int ffv1_init_slice_contexts(FFV1Context *f)
static int read_header(FFV1Context *f)
if(ac->has_optimized_func)
static const float pred[4]
#define AV_PIX_FMT_YUV420P16
int context_count[MAX_QUANT_TABLES]
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
main external API structure.
static void close(AVCodecParserContext *s)
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
void ffv1_clear_slice_state(FFV1Context *f, FFV1Context *fs)
static unsigned int get_bits1(GetBitContext *s)
#define AV_PIX_FMT_YUV420P10
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
av_cold void ff_init_range_decoder(RangeCoder *c, const uint8_t *buf, int buf_size)
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
#define AV_PIX_FMT_YUV420P9
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
#define AV_PIX_FMT_YUV422P10
static const uint16_t scale[4]
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
#define CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
common internal api header.
uint8_t(* state)[CONTEXT_SIZE]
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
static av_cold int init(AVCodecParserContext *s)
uint8_t * bytestream_start
PlaneContext plane[MAX_PLANES]
int(* execute)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size)
The codec may call this to execute several independent things.
int top_field_first
If the content is interlaced, is top field displayed first.
av_cold int ffv1_close(AVCodecContext *avctx)
int key_frame
1 -> keyframe, 0-> not
struct FFV1Context * slice_context[MAX_SLICES]
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
enum AVColorSpace colorspace
static int get_sr_golomb(GetBitContext *gb, int k, int limit, int esc_len)
read signed golomb rice code (ffv1).
This structure stores compressed data.
static int read_extra_header(FFV1Context *f)
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
#define AV_PIX_FMT_YUV422P16