* FF Video Codec 1 (a lossless codec)
*/
+#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "avcodec.h"
#include "get_bits.h"
#include "put_bits.h"
-#include "dsputil.h"
#include "rangecoder.h"
#include "golomb.h"
#include "mathops.h"
+#include "ffv1.h"
-#define MAX_PLANES 4
-#define CONTEXT_SIZE 32
-
-#define MAX_QUANT_TABLES 8
-#define MAX_CONTEXT_INPUTS 5
-
-extern const uint8_t ff_log2_run[41];
-
-static const int8_t quant5_10bit[256] = {
+const int8_t ffv1_quant5_10bit[256] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-1, -1, -1, -1, -1, -1, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0,
};
-static const int8_t quant5[256] = {
+const int8_t ffv1_quant5[256] = {
0, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
-2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -1, -1, -1,
};
-static const int8_t quant9_10bit[256] = {
+const int8_t ffv1_quant9_10bit[256] = {
0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-2, -2, -2, -2, -1, -1, -1, -1, -1, -1, -1, -1, -0, -0, -0, -0,
};
-static const int8_t quant11[256] = {
+const int8_t ffv1_quant11[256] = {
0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
-4, -4, -4, -4, -4, -3, -3, -3, -3, -3, -3, -3, -2, -2, -2, -1,
};
-static const uint8_t ver2_state[256] = {
+const uint8_t ffv1_ver2_state[256] = {
0, 10, 10, 10, 10, 16, 16, 16, 28, 16, 16, 29, 42, 49, 20, 49,
59, 25, 26, 26, 27, 31, 33, 33, 33, 34, 34, 37, 67, 38, 39, 39,
40, 40, 41, 79, 43, 44, 45, 45, 48, 48, 64, 50, 51, 52, 88, 52,
241, 243, 242, 244, 245, 246, 247, 248, 249, 250, 251, 252, 252, 253, 254, 255,
};
-typedef struct VlcState {
- int16_t drift;
- uint16_t error_sum;
- int8_t bias;
- uint8_t count;
-} VlcState;
-
-typedef struct PlaneContext {
- int16_t quant_table[MAX_CONTEXT_INPUTS][256];
- int quant_table_index;
- int context_count;
- uint8_t (*state)[CONTEXT_SIZE];
- VlcState *vlc_state;
- uint8_t interlace_bit_state[2];
-} PlaneContext;
-
-#define MAX_SLICES 256
-
-typedef struct FFV1Context {
- AVCodecContext *avctx;
- RangeCoder c;
- GetBitContext gb;
- PutBitContext pb;
- uint64_t rc_stat[256][2];
- uint64_t (*rc_stat2[MAX_QUANT_TABLES])[32][2];
- int version;
- int width, height;
- int chroma_h_shift, chroma_v_shift;
- int flags;
- int picture_number;
- AVFrame picture;
- int plane_count;
- int ac; // 1 = range coder <-> 0 = golomb rice
- PlaneContext plane[MAX_PLANES];
- int16_t quant_table[MAX_CONTEXT_INPUTS][256];
- int16_t quant_tables[MAX_QUANT_TABLES][MAX_CONTEXT_INPUTS][256];
- int context_count[MAX_QUANT_TABLES];
- uint8_t state_transition[256];
- uint8_t (*initial_states[MAX_QUANT_TABLES])[32];
- int run_index;
- int colorspace;
- int16_t *sample_buffer;
- int gob_count;
-
- int quant_table_count;
-
- DSPContext dsp;
-
- struct FFV1Context *slice_context[MAX_SLICES];
- int slice_count;
- int num_v_slices;
- int num_h_slices;
- int slice_width;
- int slice_height;
- int slice_x;
- int slice_y;
-} FFV1Context;
-
-static av_always_inline int fold(int diff, int bits)
-{
- if (bits == 8)
- diff = (int8_t)diff;
- else {
- diff += 1 << (bits - 1);
- diff &= (1 << bits) - 1;
- diff -= 1 << (bits - 1);
- }
-
- return diff;
-}
-
-static inline int predict(int16_t *src, int16_t *last)
-{
- const int LT = last[-1];
- const int T = last[0];
- const int L = src[-1];
-
- return mid_pred(L, L + T - LT, T);
-}
-
-static inline int get_context(PlaneContext *p, int16_t *src,
- int16_t *last, int16_t *last2)
-{
- const int LT = last[-1];
- const int T = last[0];
- const int RT = last[1];
- const int L = src[-1];
-
- if (p->quant_table[3][127]) {
- const int TT = last2[0];
- const int LL = src[-2];
- return p->quant_table[0][(L - LT) & 0xFF] +
- p->quant_table[1][(LT - T) & 0xFF] +
- p->quant_table[2][(T - RT) & 0xFF] +
- p->quant_table[3][(LL - L) & 0xFF] +
- p->quant_table[4][(TT - T) & 0xFF];
- } else
- return p->quant_table[0][(L - LT) & 0xFF] +
- p->quant_table[1][(LT - T) & 0xFF] +
- p->quant_table[2][(T - RT) & 0xFF];
-}
-
-static void find_best_state(uint8_t best_state[256][256],
- const uint8_t one_state[256])
-{
- int i, j, k, m;
- double l2tab[256];
-
- for (i = 1; i < 256; i++)
- l2tab[i] = log2(i / 256.0);
-
- for (i = 0; i < 256; i++) {
- double best_len[256];
- double p = i / 256.0;
-
- for (j = 0; j < 256; j++)
- best_len[j] = 1 << 30;
-
- for (j = FFMAX(i - 10, 1); j < FFMIN(i + 11, 256); j++) {
- double occ[256] = { 0 };
- double len = 0;
- occ[j] = 1.0;
- for (k = 0; k < 256; k++) {
- double newocc[256] = { 0 };
- for (m = 0; m < 256; m++)
- if (occ[m]) {
- len -= occ[m] * (p * l2tab[m] +
- (1 - p) * l2tab[256 - m]);
- }
- if (len < best_len[k]) {
- best_len[k] = len;
- best_state[i][k] = j;
- }
- for (m = 0; m < 256; m++)
- if (occ[m]) {
- newocc[one_state[m]] += occ[m] * p;
- newocc[256 - one_state[256 - m]] += occ[m] * (1 - p);
- }
- memcpy(occ, newocc, sizeof(occ));
- }
- }
- }
-}
-
-static av_always_inline av_flatten void put_symbol_inline(RangeCoder *c,
- uint8_t *state, int v,
- int is_signed,
- uint64_t rc_stat[256][2],
- uint64_t rc_stat2[32][2])
-{
- int i;
-
-#define put_rac(C, S, B) \
- do { \
- if (rc_stat) { \
- rc_stat[*(S)][B]++; \
- rc_stat2[(S) - state][B]++; \
- } \
- put_rac(C, S, B); \
- } while (0)
-
- if (v) {
- const int a = FFABS(v);
- const int e = av_log2(a);
- put_rac(c, state + 0, 0);
- if (e <= 9) {
- for (i = 0; i < e; i++)
- put_rac(c, state + 1 + i, 1); // 1..10
- put_rac(c, state + 1 + i, 0);
-
- for (i = e - 1; i >= 0; i--)
- put_rac(c, state + 22 + i, (a >> i) & 1); // 22..31
-
- if (is_signed)
- put_rac(c, state + 11 + e, v < 0); // 11..21
- } else {
- for (i = 0; i < e; i++)
- put_rac(c, state + 1 + FFMIN(i, 9), 1); // 1..10
- put_rac(c, state + 1 + 9, 0);
-
- for (i = e - 1; i >= 0; i--)
- put_rac(c, state + 22 + FFMIN(i, 9), (a >> i) & 1); // 22..31
-
- if (is_signed)
- put_rac(c, state + 11 + 10, v < 0); // 11..21
- }
- } else {
- put_rac(c, state + 0, 1);
- }
-#undef put_rac
-}
-
-static av_noinline void put_symbol(RangeCoder *c, uint8_t *state,
- int v, int is_signed)
-{
- put_symbol_inline(c, state, v, is_signed, NULL, NULL);
-}
-
-static inline av_flatten int get_symbol_inline(RangeCoder *c, uint8_t *state,
- int is_signed)
-{
- if (get_rac(c, state + 0))
- return 0;
- else {
- int i, e, a;
- e = 0;
- while (get_rac(c, state + 1 + FFMIN(e, 9))) // 1..10
- e++;
-
- a = 1;
- for (i = e - 1; i >= 0; i--)
- a += a + get_rac(c, state + 22 + FFMIN(i, 9)); // 22..31
-
- e = -(is_signed && get_rac(c, state + 11 + FFMIN(e, 10))); // 11..21
- return (a ^ e) - e;
- }
-}
-
-static av_noinline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed)
-{
- return get_symbol_inline(c, state, is_signed);
-}
-
-static inline void update_vlc_state(VlcState *const state, const int v)
-{
- int drift = state->drift;
- int count = state->count;
- state->error_sum += FFABS(v);
- drift += v;
-
- if (count == 128) { // FIXME: variable
- count >>= 1;
- drift >>= 1;
- state->error_sum >>= 1;
- }
- count++;
-
- if (drift <= -count) {
- if (state->bias > -128)
- state->bias--;
-
- drift += count;
- if (drift <= -count)
- drift = -count + 1;
- } else if (drift > 0) {
- if (state->bias < 127)
- state->bias++;
-
- drift -= count;
- if (drift > 0)
- drift = 0;
- }
-
- state->drift = drift;
- state->count = count;
-}
-
-static inline void put_vlc_symbol(PutBitContext *pb, VlcState *const state,
- int v, int bits)
-{
- int i, k, code;
- v = fold(v - state->bias, bits);
-
- i = state->count;
- k = 0;
- while (i < state->error_sum) { // FIXME: optimize
- k++;
- i += i;
- }
-
- assert(k <= 8);
-
-#if 0 // JPEG LS
- if (k == 0 && 2 * state->drift <= -state->count)
- code = v ^ (-1);
- else
- code = v;
-#else
- code = v ^ ((2 * state->drift + state->count) >> 31);
-#endif
-
- av_dlog(NULL, "v:%d/%d bias:%d error:%d drift:%d count:%d k:%d\n", v, code,
- state->bias, state->error_sum, state->drift, state->count, k);
- set_sr_golomb(pb, code, k, 12, bits);
-
- update_vlc_state(state, v);
-}
-
-static inline int get_vlc_symbol(GetBitContext *gb, VlcState *const state,
- int bits)
-{
- int k, i, v, ret;
-
- i = state->count;
- k = 0;
- while (i < state->error_sum) { // FIXME: optimize
- k++;
- i += i;
- }
-
- assert(k <= 8);
-
- v = get_sr_golomb(gb, k, 12, bits);
- av_dlog(NULL, "v:%d bias:%d error:%d drift:%d count:%d k:%d",
- v, state->bias, state->error_sum, state->drift, state->count, k);
-
-#if 0 // JPEG LS
- if (k == 0 && 2 * state->drift <= -state->count)
- v ^= (-1);
-#else
- v ^= ((2 * state->drift + state->count) >> 31);
-#endif
-
- ret = fold(v + state->bias, bits);
-
- update_vlc_state(state, v);
-
- return ret;
-}
-
-#if CONFIG_FFV1_ENCODER
-static av_always_inline int encode_line(FFV1Context *s, int w,
- int16_t *sample[3],
- int plane_index, int bits)
-{
- PlaneContext *const p = &s->plane[plane_index];
- RangeCoder *const c = &s->c;
- int x;
- int run_index = s->run_index;
- int run_count = 0;
- int run_mode = 0;
-
- if (s->ac) {
- if (c->bytestream_end - c->bytestream < w * 20) {
- av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
- return -1;
- }
- } else {
- if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) < w * 4) {
- av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
- return -1;
- }
- }
-
- for (x = 0; x < w; x++) {
- int diff, context;
-
- context = get_context(p, sample[0] + x, sample[1] + x, sample[2] + x);
- diff = sample[0][x] - predict(sample[0] + x, sample[1] + x);
-
- if (context < 0) {
- context = -context;
- diff = -diff;
- }
-
- diff = fold(diff, bits);
-
- if (s->ac) {
- if (s->flags & CODEC_FLAG_PASS1) {
- put_symbol_inline(c, p->state[context], diff, 1, s->rc_stat,
- s->rc_stat2[p->quant_table_index][context]);
- } else {
- put_symbol_inline(c, p->state[context], diff, 1, NULL, NULL);
- }
- } else {
- if (context == 0)
- run_mode = 1;
-
- if (run_mode) {
- if (diff) {
- while (run_count >= 1 << ff_log2_run[run_index]) {
- run_count -= 1 << ff_log2_run[run_index];
- run_index++;
- put_bits(&s->pb, 1, 1);
- }
-
- put_bits(&s->pb, 1 + ff_log2_run[run_index], run_count);
- if (run_index)
- run_index--;
- run_count = 0;
- run_mode = 0;
- if (diff > 0)
- diff--;
- } else {
- run_count++;
- }
- }
-
- av_dlog(s->avctx, "count:%d index:%d, mode:%d, x:%d pos:%d\n",
- run_count, run_index, run_mode, x,
- (int)put_bits_count(&s->pb));
-
- if (run_mode == 0)
- put_vlc_symbol(&s->pb, &p->vlc_state[context], diff, bits);
- }
- }
- if (run_mode) {
- while (run_count >= 1 << ff_log2_run[run_index]) {
- run_count -= 1 << ff_log2_run[run_index];
- run_index++;
- put_bits(&s->pb, 1, 1);
- }
-
- if (run_count)
- put_bits(&s->pb, 1, 1);
- }
- s->run_index = run_index;
-
- return 0;
-}
-
-static void encode_plane(FFV1Context *s, uint8_t *src, int w, int h,
- int stride, int plane_index)
-{
- int x, y, i;
- const int ring_size = s->avctx->context_model ? 3 : 2;
- int16_t *sample[3];
- s->run_index = 0;
-
- memset(s->sample_buffer, 0, ring_size * (w + 6) * sizeof(*s->sample_buffer));
-
- for (y = 0; y < h; y++) {
- for (i = 0; i < ring_size; i++)
- sample[i] = s->sample_buffer + (w + 6) * ((h + i - y) % ring_size) + 3;
-
- sample[0][-1] = sample[1][0];
- sample[1][w] = sample[1][w - 1];
-// { START_TIMER
- if (s->avctx->bits_per_raw_sample <= 8) {
- for (x = 0; x < w; x++)
- sample[0][x] = src[x + stride * y];
- encode_line(s, w, sample, plane_index, 8);
- } else {
- for (x = 0; x < w; x++)
- sample[0][x] = ((uint16_t *)(src + stride * y))[x] >>
- (16 - s->avctx->bits_per_raw_sample);
- encode_line(s, w, sample, plane_index, s->avctx->bits_per_raw_sample);
- }
-// STOP_TIMER("encode line") }
- }
-}
-
-static void encode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h,
- int stride)
-{
- int x, y, p, i;
- const int ring_size = s->avctx->context_model ? 3 : 2;
- int16_t *sample[3][3];
- s->run_index = 0;
-
- memset(s->sample_buffer, 0, ring_size * 3 * (w + 6) * sizeof(*s->sample_buffer));
-
- for (y = 0; y < h; y++) {
- for (i = 0; i < ring_size; i++)
- for (p = 0; p < 3; p++)
- sample[p][i] = s->sample_buffer + p * ring_size * (w + 6) +
- ((h + i - y) % ring_size) * (w + 6) + 3;
-
- for (x = 0; x < w; x++) {
- int v = src[x + stride * y];
- int b = v & 0xFF;
- int g = (v >> 8) & 0xFF;
- int r = (v >> 16) & 0xFF;
-
- b -= g;
- r -= g;
- g += (b + r) >> 2;
- b += 0x100;
- r += 0x100;
-
- sample[0][0][x] = g;
- sample[1][0][x] = b;
- sample[2][0][x] = r;
- }
- for (p = 0; p < 3; p++) {
- sample[p][0][-1] = sample[p][1][0];
- sample[p][1][w] = sample[p][1][w - 1];
- encode_line(s, w, sample[p], FFMIN(p, 1), 9);
- }
- }
-}
-
-static void write_quant_table(RangeCoder *c, int16_t *quant_table)
-{
- int last = 0;
- int i;
- uint8_t state[CONTEXT_SIZE];
- memset(state, 128, sizeof(state));
-
- for (i = 1; i < 128; i++)
- if (quant_table[i] != quant_table[i - 1]) {
- put_symbol(c, state, i - last - 1, 0);
- last = i;
- }
- put_symbol(c, state, i - last - 1, 0);
-}
-
-static void write_quant_tables(RangeCoder *c,
- int16_t quant_table[MAX_CONTEXT_INPUTS][256])
-{
- int i;
- for (i = 0; i < 5; i++)
- write_quant_table(c, quant_table[i]);
-}
-static void write_header(FFV1Context *f)
-{
- uint8_t state[CONTEXT_SIZE];
- int i, j;
- RangeCoder *const c = &f->slice_context[0]->c;
-
- memset(state, 128, sizeof(state));
-
- if (f->version < 2) {
- put_symbol(c, state, f->version, 0);
- put_symbol(c, state, f->ac, 0);
- if (f->ac > 1) {
- for (i = 1; i < 256; i++)
- put_symbol(c, state,
- f->state_transition[i] - c->one_state[i], 1);
- }
- put_symbol(c, state, f->colorspace, 0); // YUV cs type
- if (f->version > 0)
- put_symbol(c, state, f->avctx->bits_per_raw_sample, 0);
- put_rac(c, state, 1); // chroma planes
- put_symbol(c, state, f->chroma_h_shift, 0);
- put_symbol(c, state, f->chroma_v_shift, 0);
- put_rac(c, state, 0); // no transparency plane
-
- write_quant_tables(c, f->quant_table);
- } else {
- put_symbol(c, state, f->slice_count, 0);
- for (i = 0; i < f->slice_count; i++) {
- FFV1Context *fs = f->slice_context[i];
- put_symbol(c, state,
- (fs->slice_x + 1) * f->num_h_slices / f->width, 0);
- put_symbol(c, state,
- (fs->slice_y + 1) * f->num_v_slices / f->height, 0);
- put_symbol(c, state,
- (fs->slice_width + 1) * f->num_h_slices / f->width - 1,
- 0);
- put_symbol(c, state,
- (fs->slice_height + 1) * f->num_v_slices / f->height - 1,
- 0);
- for (j = 0; j < f->plane_count; j++) {
- put_symbol(c, state, f->plane[j].quant_table_index, 0);
- av_assert0(f->plane[j].quant_table_index == f->avctx->context_model);
- }
- }
- }
-}
-
-#endif /* CONFIG_FFV1_ENCODER */
-
-static av_cold int common_init(AVCodecContext *avctx)
+av_cold int ffv1_common_init(AVCodecContext *avctx)
{
FFV1Context *s = avctx->priv_data;
s->avctx = avctx;
s->flags = avctx->flags;
- ff_dsputil_init(&s->dsp, avctx);
+ if (!avctx->width || !avctx->height)
+ return AVERROR_INVALIDDATA;
s->width = avctx->width;
s->height = avctx->height;
- assert(s->width && s->height);
// defaults
s->num_h_slices = 1;
s->num_v_slices = 1;
return 0;
}
-static int init_slice_state(FFV1Context *f)
+int ffv1_init_slice_state(FFV1Context *f, FFV1Context *fs)
{
- int i, j;
+ int j;
- for (i = 0; i < f->slice_count; i++) {
- FFV1Context *fs = f->slice_context[i];
- for (j = 0; j < f->plane_count; j++) {
- PlaneContext *const p = &fs->plane[j];
+ fs->plane_count = f->plane_count;
+ fs->transparency = f->transparency;
+ for (j = 0; j < f->plane_count; j++) {
+ PlaneContext *const p = &fs->plane[j];
- if (fs->ac) {
- if (!p->state)
- p->state = av_malloc(CONTEXT_SIZE * p->context_count *
- sizeof(uint8_t));
- if (!p->state)
- return AVERROR(ENOMEM);
- } else {
- if (!p->vlc_state)
- p->vlc_state = av_malloc(p->context_count * sizeof(VlcState));
- if (!p->vlc_state)
- return AVERROR(ENOMEM);
- }
+ if (fs->ac) {
+ if (!p->state)
+ p->state = av_malloc(CONTEXT_SIZE * p->context_count *
+ sizeof(uint8_t));
+ if (!p->state)
+ return AVERROR(ENOMEM);
+ } else {
+ if (!p->vlc_state)
+ p->vlc_state = av_malloc(p->context_count * sizeof(VlcState));
+ if (!p->vlc_state)
+ return AVERROR(ENOMEM);
}
+ }
- if (fs->ac > 1) {
- // FIXME: only redo if state_transition changed
- for (j = 1; j < 256; j++) {
- fs->c.one_state[j] = fs->state_transition[j];
- fs->c.zero_state[256 - j] = 256 - fs->c.one_state[j];
- }
+ if (fs->ac > 1) {
+ //FIXME only redo if state_transition changed
+ for (j = 1; j < 256; j++) {
+ fs->c.one_state[j] = f->state_transition[j];
+ fs->c.zero_state[256 - j] = 256 - fs->c.one_state[j];
}
}
return 0;
}
-static av_cold int init_slice_contexts(FFV1Context *f)
+av_cold int ffv1_init_slice_contexts(FFV1Context *f)
{
int i;
f->slice_count = f->num_h_slices * f->num_v_slices;
+ if (f->slice_count <= 0) {
+ av_log(f->avctx, AV_LOG_ERROR, "Invalid number of slices\n");
+ return AVERROR(EINVAL);
+ }
for (i = 0; i < f->slice_count; i++) {
FFV1Context *fs = av_mallocz(sizeof(*fs));
fs->slice_x = sxs;
fs->slice_y = sys;
- fs->sample_buffer = av_malloc(9 * (fs->width + 6) *
+ fs->sample_buffer = av_malloc(3 * MAX_PLANES * (fs->width + 6) *
sizeof(*fs->sample_buffer));
if (!fs->sample_buffer)
return AVERROR(ENOMEM);
return 0;
}
-static int allocate_initial_states(FFV1Context *f)
+int ffv1_allocate_initial_states(FFV1Context *f)
{
int i;
return 0;
}
-#if CONFIG_FFV1_ENCODER
-static int write_extra_header(FFV1Context *f)
-{
- RangeCoder *const c = &f->c;
- uint8_t state[CONTEXT_SIZE];
- int i, j, k;
- uint8_t state2[32][CONTEXT_SIZE];
-
- memset(state2, 128, sizeof(state2));
- memset(state, 128, sizeof(state));
-
- f->avctx->extradata = av_malloc(f->avctx->extradata_size = 10000 +
- (11 * 11 * 5 * 5 * 5 + 11 * 11 * 11) * 32);
- ff_init_range_encoder(c, f->avctx->extradata, f->avctx->extradata_size);
- ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
-
- put_symbol(c, state, f->version, 0);
- put_symbol(c, state, f->ac, 0);
- if (f->ac > 1)
- for (i = 1; i < 256; i++)
- put_symbol(c, state, f->state_transition[i] - c->one_state[i], 1);
- put_symbol(c, state, f->colorspace, 0); // YUV cs type
- put_symbol(c, state, f->avctx->bits_per_raw_sample, 0);
- put_rac(c, state, 1); // chroma planes
- put_symbol(c, state, f->chroma_h_shift, 0);
- put_symbol(c, state, f->chroma_v_shift, 0);
- put_rac(c, state, 0); // no transparency plane
- put_symbol(c, state, f->num_h_slices - 1, 0);
- put_symbol(c, state, f->num_v_slices - 1, 0);
-
- put_symbol(c, state, f->quant_table_count, 0);
- for (i = 0; i < f->quant_table_count; i++)
- write_quant_tables(c, f->quant_tables[i]);
-
- for (i = 0; i < f->quant_table_count; i++) {
- for (j = 0; j < f->context_count[i] * CONTEXT_SIZE; j++)
- if (f->initial_states[i] && f->initial_states[i][0][j] != 128)
- break;
- if (j < f->context_count[i] * CONTEXT_SIZE) {
- put_rac(c, state, 1);
- for (j = 0; j < f->context_count[i]; j++)
- for (k = 0; k < CONTEXT_SIZE; k++) {
- int pred = j ? f->initial_states[i][j - 1][k] : 128;
- put_symbol(c, state2[k],
- (int8_t)(f->initial_states[i][j][k] - pred), 1);
- }
- } else {
- put_rac(c, state, 0);
- }
- }
-
- f->avctx->extradata_size = ff_rac_terminate(c);
-
- return 0;
-}
-
-static int sort_stt(FFV1Context *s, uint8_t stt[256])
-{
- int i, i2, changed, print = 0;
-
- do {
- changed = 0;
- for (i = 12; i < 244; i++) {
- for (i2 = i + 1; i2 < 245 && i2 < i + 4; i2++) {
-
-#define COST(old, new) \
- s->rc_stat[old][0] * -log2((256 - (new)) / 256.0) + \
- s->rc_stat[old][1] * -log2((new) / 256.0)
-
-#define COST2(old, new) \
- COST(old, new) + COST(256 - (old), 256 - (new))
-
- double size0 = COST2(i, i) + COST2(i2, i2);
- double sizeX = COST2(i, i2) + COST2(i2, i);
- if (sizeX < size0 && i != 128 && i2 != 128) {
- int j;
- FFSWAP(int, stt[i], stt[i2]);
- FFSWAP(int, s->rc_stat[i][0], s->rc_stat[i2][0]);
- FFSWAP(int, s->rc_stat[i][1], s->rc_stat[i2][1]);
- if (i != 256 - i2) {
- FFSWAP(int, stt[256 - i], stt[256 - i2]);
- FFSWAP(int, s->rc_stat[256 - i][0], s->rc_stat[256 - i2][0]);
- FFSWAP(int, s->rc_stat[256 - i][1], s->rc_stat[256 - i2][1]);
- }
- for (j = 1; j < 256; j++) {
- if (stt[j] == i)
- stt[j] = i2;
- else if (stt[j] == i2)
- stt[j] = i;
- if (i != 256 - i2) {
- if (stt[256 - j] == 256 - i)
- stt[256 - j] = 256 - i2;
- else if (stt[256 - j] == 256 - i2)
- stt[256 - j] = 256 - i;
- }
- }
- print = changed = 1;
- }
- }
- }
- } while (changed);
- return print;
-}
-
-static av_cold int encode_init(AVCodecContext *avctx)
-{
- FFV1Context *s = avctx->priv_data;
- int i, j, k, m;
-
- common_init(avctx);
-
- s->version = 0;
- s->ac = avctx->coder_type ? 2 : 0;
-
- if (s->ac > 1)
- for (i = 1; i < 256; i++)
- s->state_transition[i] = ver2_state[i];
-
- s->plane_count = 2;
- for (i = 0; i < 256; i++) {
- s->quant_table_count = 2;
- if (avctx->bits_per_raw_sample <= 8) {
- s->quant_tables[0][0][i] = quant11[i];
- s->quant_tables[0][1][i] = quant11[i] * 11;
- s->quant_tables[0][2][i] = quant11[i] * 11 * 11;
- s->quant_tables[1][0][i] = quant11[i];
- s->quant_tables[1][1][i] = quant11[i] * 11;
- s->quant_tables[1][2][i] = quant5[i] * 11 * 11;
- s->quant_tables[1][3][i] = quant5[i] * 5 * 11 * 11;
- s->quant_tables[1][4][i] = quant5[i] * 5 * 5 * 11 * 11;
- } else {
- s->quant_tables[0][0][i] = quant9_10bit[i];
- s->quant_tables[0][1][i] = quant9_10bit[i] * 11;
- s->quant_tables[0][2][i] = quant9_10bit[i] * 11 * 11;
- s->quant_tables[1][0][i] = quant9_10bit[i];
- s->quant_tables[1][1][i] = quant9_10bit[i] * 11;
- s->quant_tables[1][2][i] = quant5_10bit[i] * 11 * 11;
- s->quant_tables[1][3][i] = quant5_10bit[i] * 5 * 11 * 11;
- s->quant_tables[1][4][i] = quant5_10bit[i] * 5 * 5 * 11 * 11;
- }
- }
- s->context_count[0] = (11 * 11 * 11 + 1) / 2;
- s->context_count[1] = (11 * 11 * 5 * 5 * 5 + 1) / 2;
- memcpy(s->quant_table, s->quant_tables[avctx->context_model],
- sizeof(s->quant_table));
-
- for (i = 0; i < s->plane_count; i++) {
- PlaneContext *const p = &s->plane[i];
-
- memcpy(p->quant_table, s->quant_table, sizeof(p->quant_table));
- p->quant_table_index = avctx->context_model;
- p->context_count = s->context_count[p->quant_table_index];
- }
-
- if (allocate_initial_states(s) < 0)
- return AVERROR(ENOMEM);
-
- avctx->coded_frame = &s->picture;
- switch (avctx->pix_fmt) {
- case AV_PIX_FMT_YUV444P16:
- case AV_PIX_FMT_YUV422P16:
- case AV_PIX_FMT_YUV420P16:
- if (avctx->bits_per_raw_sample <= 8) {
- av_log(avctx, AV_LOG_ERROR, "bits_per_raw_sample invalid\n");
- return -1;
- }
- if (!s->ac) {
- av_log(avctx, AV_LOG_ERROR,
- "bits_per_raw_sample of more than 8 needs -coder 1 currently\n");
- return -1;
- }
- s->version = FFMAX(s->version, 1);
- case AV_PIX_FMT_YUV444P:
- case AV_PIX_FMT_YUV422P:
- case AV_PIX_FMT_YUV420P:
- case AV_PIX_FMT_YUV411P:
- case AV_PIX_FMT_YUV410P:
- s->colorspace = 0;
- break;
- case AV_PIX_FMT_RGB32:
- s->colorspace = 1;
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "format not supported\n");
- return -1;
- }
- avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift,
- &s->chroma_v_shift);
-
- s->picture_number = 0;
-
- if (avctx->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
- for (i = 0; i < s->quant_table_count; i++) {
- s->rc_stat2[i] = av_mallocz(s->context_count[i] *
- sizeof(*s->rc_stat2[i]));
- if (!s->rc_stat2[i])
- return AVERROR(ENOMEM);
- }
- }
- if (avctx->stats_in) {
- char *p = avctx->stats_in;
- uint8_t best_state[256][256];
- int gob_count = 0;
- char *next;
-
- av_assert0(s->version >= 2);
-
- for (;; ) {
- for (j = 0; j < 256; j++)
- for (i = 0; i < 2; i++) {
- s->rc_stat[j][i] = strtol(p, &next, 0);
- if (next == p) {
- av_log(avctx, AV_LOG_ERROR,
- "2Pass file invalid at %d %d [%s]\n", j, i, p);
- return -1;
- }
- p = next;
- }
- for (i = 0; i < s->quant_table_count; i++)
- for (j = 0; j < s->context_count[i]; j++) {
- for (k = 0; k < 32; k++)
- for (m = 0; m < 2; m++) {
- s->rc_stat2[i][j][k][m] = strtol(p, &next, 0);
- if (next == p) {
- av_log(avctx, AV_LOG_ERROR,
- "2Pass file invalid at %d %d %d %d [%s]\n",
- i, j, k, m, p);
- return -1;
- }
- p = next;
- }
- }
- gob_count = strtol(p, &next, 0);
- if (next == p || gob_count < 0) {
- av_log(avctx, AV_LOG_ERROR, "2Pass file invalid\n");
- return -1;
- }
- p = next;
- while (*p == '\n' || *p == ' ')
- p++;
- if (p[0] == 0)
- break;
- }
- sort_stt(s, s->state_transition);
-
- find_best_state(best_state, s->state_transition);
-
- for (i = 0; i < s->quant_table_count; i++) {
- for (j = 0; j < s->context_count[i]; j++)
- for (k = 0; k < 32; k++) {
- double p = 128;
- if (s->rc_stat2[i][j][k][0] + s->rc_stat2[i][j][k][1]) {
- p = 256.0 * s->rc_stat2[i][j][k][1] /
- (s->rc_stat2[i][j][k][0] + s->rc_stat2[i][j][k][1]);
- }
- s->initial_states[i][j][k] =
- best_state[av_clip(round(p), 1, 255)][av_clip((s->rc_stat2[i][j][k][0] +
- s->rc_stat2[i][j][k][1]) /
- gob_count, 0, 255)];
- }
- }
- }
-
- if (s->version > 1) {
- s->num_h_slices = 2;
- s->num_v_slices = 2;
- write_extra_header(s);
- }
-
- if (init_slice_contexts(s) < 0)
- return -1;
- if (init_slice_state(s) < 0)
- return -1;
-
-#define STATS_OUT_SIZE 1024 * 1024 * 6
- if (avctx->flags & CODEC_FLAG_PASS1) {
- avctx->stats_out = av_mallocz(STATS_OUT_SIZE);
- for (i = 0; i < s->quant_table_count; i++)
- for (j = 0; j < s->slice_count; j++) {
- FFV1Context *sf = s->slice_context[j];
- av_assert0(!sf->rc_stat2[i]);
- sf->rc_stat2[i] = av_mallocz(s->context_count[i] *
- sizeof(*sf->rc_stat2[i]));
- if (!sf->rc_stat2[i])
- return AVERROR(ENOMEM);
- }
- }
-
- return 0;
-}
-
-#endif /* CONFIG_FFV1_ENCODER */
-
-static void clear_state(FFV1Context *f)
-{
- int i, si, j;
-
- for (si = 0; si < f->slice_count; si++) {
- FFV1Context *fs = f->slice_context[si];
- for (i = 0; i < f->plane_count; i++) {
- PlaneContext *p = &fs->plane[i];
-
- p->interlace_bit_state[0] = 128;
- p->interlace_bit_state[1] = 128;
-
- if (fs->ac) {
- if (f->initial_states[p->quant_table_index]) {
- memcpy(p->state, f->initial_states[p->quant_table_index],
- CONTEXT_SIZE * p->context_count);
- } else
- memset(p->state, 128, CONTEXT_SIZE * p->context_count);
- } else {
- for (j = 0; j < p->context_count; j++) {
- p->vlc_state[j].drift = 0;
- p->vlc_state[j].error_sum = 4; // FFMAX((RANGE + 32)/64, 2);
- p->vlc_state[j].bias = 0;
- p->vlc_state[j].count = 1;
- }
- }
- }
- }
-}
-
-#if CONFIG_FFV1_ENCODER
-static int encode_slice(AVCodecContext *c, void *arg)
-{
- FFV1Context *fs = *(void **)arg;
- FFV1Context *f = fs->avctx->priv_data;
- int width = fs->slice_width;
- int height = fs->slice_height;
- int x = fs->slice_x;
- int y = fs->slice_y;
- AVFrame *const p = &f->picture;
-
- if (f->colorspace == 0) {
- const int chroma_width = -((-width) >> f->chroma_h_shift);
- const int chroma_height = -((-height) >> f->chroma_v_shift);
- const int cx = x >> f->chroma_h_shift;
- const int cy = y >> f->chroma_v_shift;
-
- encode_plane(fs, p->data[0] + x + y * p->linesize[0],
- width, height, p->linesize[0], 0);
-
- encode_plane(fs, p->data[1] + cx + cy * p->linesize[1],
- chroma_width, chroma_height, p->linesize[1], 1);
- encode_plane(fs, p->data[2] + cx + cy * p->linesize[2],
- chroma_width, chroma_height, p->linesize[2], 1);
- } else {
- encode_rgb_frame(fs, (uint32_t *)(p->data[0]) +
- x + y * (p->linesize[0] / 4),
- width, height, p->linesize[0] / 4);
- }
- emms_c();
-
- return 0;
-}
-
-static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
- const AVFrame *pict, int *got_packet)
+void ffv1_clear_slice_state(FFV1Context *f, FFV1Context *fs)
{
- FFV1Context *f = avctx->priv_data;
- RangeCoder *const c = &f->slice_context[0]->c;
- AVFrame *const p = &f->picture;
- int used_count = 0;
- uint8_t keystate = 128;
- uint8_t *buf_p;
- int i, ret;
-
- if (!pkt->data &&
- (ret = av_new_packet(pkt, avctx->width * avctx->height *
- ((8 * 2 + 1 + 1) * 4) / 8 + FF_MIN_BUFFER_SIZE)) < 0) {
- av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
- return ret;
- }
-
- ff_init_range_encoder(c, pkt->data, pkt->size);
- ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
-
- *p = *pict;
- p->pict_type = AV_PICTURE_TYPE_I;
-
- if (avctx->gop_size == 0 || f->picture_number % avctx->gop_size == 0) {
- put_rac(c, &keystate, 1);
- p->key_frame = 1;
- f->gob_count++;
- write_header(f);
- clear_state(f);
- } else {
- put_rac(c, &keystate, 0);
- p->key_frame = 0;
- }
-
- if (!f->ac) {
- used_count += ff_rac_terminate(c);
- init_put_bits(&f->slice_context[0]->pb, pkt->data + used_count,
- pkt->size - used_count);
- } else if (f->ac > 1) {
- int i;
- for (i = 1; i < 256; i++) {
- c->one_state[i] = f->state_transition[i];
- c->zero_state[256 - i] = 256 - c->one_state[i];
- }
- }
+ int i, j;
- for (i = 1; i < f->slice_count; i++) {
- FFV1Context *fs = f->slice_context[i];
- uint8_t *start = pkt->data + (pkt->size - used_count) * i / f->slice_count;
- int len = pkt->size / f->slice_count;
+ for (i = 0; i < f->plane_count; i++) {
+ PlaneContext *p = &fs->plane[i];
- if (fs->ac)
- ff_init_range_encoder(&fs->c, start, len);
- else
- init_put_bits(&fs->pb, start, len);
- }
- avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL,
- f->slice_count, sizeof(void *));
-
- buf_p = pkt->data;
- for (i = 0; i < f->slice_count; i++) {
- FFV1Context *fs = f->slice_context[i];
- int bytes;
+ p->interlace_bit_state[0] = 128;
+ p->interlace_bit_state[1] = 128;
if (fs->ac) {
- uint8_t state = 128;
- put_rac(&fs->c, &state, 0);
- bytes = ff_rac_terminate(&fs->c);
+ if (f->initial_states[p->quant_table_index]) {
+ memcpy(p->state, f->initial_states[p->quant_table_index],
+ CONTEXT_SIZE * p->context_count);
+ } else
+ memset(p->state, 128, CONTEXT_SIZE * p->context_count);
} else {
- flush_put_bits(&fs->pb); // FIXME: nicer padding
- bytes = used_count + (put_bits_count(&fs->pb) + 7) / 8;
- used_count = 0;
- }
- if (i > 0) {
- av_assert0(bytes < pkt->size / f->slice_count);
- memmove(buf_p, fs->ac ? fs->c.bytestream_start : fs->pb.buf, bytes);
- av_assert0(bytes < (1 << 24));
- AV_WB24(buf_p + bytes, bytes);
- bytes += 3;
- }
- buf_p += bytes;
- }
-
- if ((avctx->flags & CODEC_FLAG_PASS1) && (f->picture_number & 31) == 0) {
- int j, k, m;
- char *p = avctx->stats_out;
- char *end = p + STATS_OUT_SIZE;
-
- memset(f->rc_stat, 0, sizeof(f->rc_stat));
- for (i = 0; i < f->quant_table_count; i++)
- memset(f->rc_stat2[i], 0, f->context_count[i] * sizeof(*f->rc_stat2[i]));
-
- for (j = 0; j < f->slice_count; j++) {
- FFV1Context *fs = f->slice_context[j];
- for (i = 0; i < 256; i++) {
- f->rc_stat[i][0] += fs->rc_stat[i][0];
- f->rc_stat[i][1] += fs->rc_stat[i][1];
+ for (j = 0; j < p->context_count; j++) {
+ p->vlc_state[j].drift = 0;
+ p->vlc_state[j].error_sum = 4; //FFMAX((RANGE + 32)/64, 2);
+ p->vlc_state[j].bias = 0;
+ p->vlc_state[j].count = 1;
}
- for (i = 0; i < f->quant_table_count; i++) {
- for (k = 0; k < f->context_count[i]; k++)
- for (m = 0; m < 32; m++) {
- f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];
- f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];
- }
- }
- }
-
- for (j = 0; j < 256; j++) {
- snprintf(p, end - p, "%" PRIu64 " %" PRIu64 " ",
- f->rc_stat[j][0], f->rc_stat[j][1]);
- p += strlen(p);
}
- snprintf(p, end - p, "\n");
-
- for (i = 0; i < f->quant_table_count; i++) {
- for (j = 0; j < f->context_count[i]; j++)
- for (m = 0; m < 32; m++) {
- snprintf(p, end - p, "%" PRIu64 " %" PRIu64 " ",
- f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);
- p += strlen(p);
- }
- }
- snprintf(p, end - p, "%d\n", f->gob_count);
- } else if (avctx->flags & CODEC_FLAG_PASS1)
- avctx->stats_out[0] = '\0';
-
- f->picture_number++;
- pkt->size = buf_p - pkt->data;
- pkt->flags |= AV_PKT_FLAG_KEY * p->key_frame;
- *got_packet = 1;
-
- return 0;
+ }
}
-#endif /* CONFIG_FFV1_ENCODER */
-
-static av_cold int common_end(AVCodecContext *avctx)
+av_cold int ffv1_close(AVCodecContext *avctx)
{
FFV1Context *s = avctx->priv_data;
int i, j;
- if (avctx->codec->decode && s->picture.data[0])
- avctx->release_buffer(avctx, &s->picture);
-
for (j = 0; j < s->slice_count; j++) {
FFV1Context *fs = s->slice_context[j];
for (i = 0; i < s->plane_count; i++) {
return 0;
}
-
-static av_always_inline void decode_line(FFV1Context *s, int w,
- int16_t *sample[2],
- int plane_index, int bits)
-{
- PlaneContext *const p = &s->plane[plane_index];
- RangeCoder *const c = &s->c;
- int x;
- int run_count = 0;
- int run_mode = 0;
- int run_index = s->run_index;
-
- for (x = 0; x < w; x++) {
- int diff, context, sign;
-
- context = get_context(p, sample[1] + x, sample[0] + x, sample[1] + x);
- if (context < 0) {
- context = -context;
- sign = 1;
- } else
- sign = 0;
-
- av_assert2(context < p->context_count);
-
- if (s->ac) {
- diff = get_symbol_inline(c, p->state[context], 1);
- } else {
- if (context == 0 && run_mode == 0)
- run_mode = 1;
-
- if (run_mode) {
- if (run_count == 0 && run_mode == 1) {
- if (get_bits1(&s->gb)) {
- run_count = 1 << ff_log2_run[run_index];
- if (x + run_count <= w)
- run_index++;
- } else {
- if (ff_log2_run[run_index])
- run_count = get_bits(&s->gb, ff_log2_run[run_index]);
- else
- run_count = 0;
- if (run_index)
- run_index--;
- run_mode = 2;
- }
- }
- run_count--;
- if (run_count < 0) {
- run_mode = 0;
- run_count = 0;
- diff = get_vlc_symbol(&s->gb, &p->vlc_state[context],
- bits);
- if (diff >= 0)
- diff++;
- } else
- diff = 0;
- } else
- diff = get_vlc_symbol(&s->gb, &p->vlc_state[context], bits);
-
- av_dlog(s->avctx, "count:%d index:%d, mode:%d, x:%d pos:%d\n",
- run_count, run_index, run_mode, x, get_bits_count(&s->gb));
- }
-
- if (sign)
- diff = -diff;
-
- sample[1][x] = (predict(sample[1] + x, sample[0] + x) + diff) &
- ((1 << bits) - 1);
- }
- s->run_index = run_index;
-}
-
-static void decode_plane(FFV1Context *s, uint8_t *src,
- int w, int h, int stride, int plane_index)
-{
- int x, y;
- int16_t *sample[2];
- sample[0] = s->sample_buffer + 3;
- sample[1] = s->sample_buffer + w + 6 + 3;
-
- s->run_index = 0;
-
- memset(s->sample_buffer, 0, 2 * (w + 6) * sizeof(*s->sample_buffer));
-
- for (y = 0; y < h; y++) {
- int16_t *temp = sample[0]; // FIXME: try a normal buffer
-
- sample[0] = sample[1];
- sample[1] = temp;
-
- sample[1][-1] = sample[0][0];
- sample[0][w] = sample[0][w - 1];
-
-// { START_TIMER
- if (s->avctx->bits_per_raw_sample <= 8) {
- decode_line(s, w, sample, plane_index, 8);
- for (x = 0; x < w; x++)
- src[x + stride * y] = sample[1][x];
- } else {
- decode_line(s, w, sample, plane_index,
- s->avctx->bits_per_raw_sample);
- for (x = 0; x < w; x++)
- ((uint16_t *)(src + stride * y))[x] =
- sample[1][x] << (16 - s->avctx->bits_per_raw_sample);
- }
-// STOP_TIMER("decode-line") }
- }
-}
-
-static void decode_rgb_frame(FFV1Context *s, uint32_t *src,
- int w, int h, int stride)
-{
- int x, y, p;
- int16_t *sample[3][2];
- for (x = 0; x < 3; x++) {
- sample[x][0] = s->sample_buffer + x * 2 * (w + 6) + 3;
- sample[x][1] = s->sample_buffer + (x * 2 + 1) * (w + 6) + 3;
- }
-
- s->run_index = 0;
-
- memset(s->sample_buffer, 0, 6 * (w + 6) * sizeof(*s->sample_buffer));
-
- for (y = 0; y < h; y++) {
- for (p = 0; p < 3; p++) {
- int16_t *temp = sample[p][0]; // FIXME: try a normal buffer
-
- sample[p][0] = sample[p][1];
- sample[p][1] = temp;
-
- sample[p][1][-1] = sample[p][0][0];
- sample[p][0][w] = sample[p][0][w - 1];
- decode_line(s, w, sample[p], FFMIN(p, 1), 9);
- }
- for (x = 0; x < w; x++) {
- int g = sample[0][1][x];
- int b = sample[1][1][x];
- int r = sample[2][1][x];
-
-// assert(g >= 0 && b >= 0 && r >= 0);
-// assert(g < 256 && b < 512 && r < 512);
-
- b -= 0x100;
- r -= 0x100;
- g -= (b + r) >> 2;
- b += g;
- r += g;
-
- src[x + stride * y] = b + (g << 8) + (r << 16) + (0xFF << 24);
- }
- }
-}
-
-static int decode_slice(AVCodecContext *c, void *arg)
-{
- FFV1Context *fs = *(void **)arg;
- FFV1Context *f = fs->avctx->priv_data;
- int width = fs->slice_width;
- int height = fs->slice_height;
- int x = fs->slice_x;
- int y = fs->slice_y;
- AVFrame *const p = &f->picture;
-
- av_assert1(width && height);
- if (f->colorspace == 0) {
- const int chroma_width = -((-width) >> f->chroma_h_shift);
- const int chroma_height = -((-height) >> f->chroma_v_shift);
- const int cx = x >> f->chroma_h_shift;
- const int cy = y >> f->chroma_v_shift;
-
- decode_plane(fs, p->data[0] + x + y * p->linesize[0],
- width, height, p->linesize[0], 0);
-
- decode_plane(fs, p->data[1] + cx + cy * p->linesize[1],
- chroma_width, chroma_height, p->linesize[1], 1);
- decode_plane(fs, p->data[2] + cx + cy * p->linesize[1],
- chroma_width, chroma_height, p->linesize[2], 1);
- } else {
- decode_rgb_frame(fs,
- (uint32_t *)p->data[0] + x + y * (p->linesize[0] / 4),
- width, height, p->linesize[0] / 4);
- }
-
- emms_c();
-
- return 0;
-}
-
-static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale)
-{
- int v;
- int i = 0;
- uint8_t state[CONTEXT_SIZE];
-
- memset(state, 128, sizeof(state));
-
- for (v = 0; i < 128; v++) {
- int len = get_symbol(c, state, 0) + 1;
-
- if (len + i > 128)
- return -1;
-
- while (len--) {
- quant_table[i] = scale * v;
- i++;
- }
- }
-
- for (i = 1; i < 128; i++)
- quant_table[256 - i] = -quant_table[i];
- quant_table[128] = -quant_table[127];
-
- return 2 * v - 1;
-}
-
-static int read_quant_tables(RangeCoder *c,
- int16_t quant_table[MAX_CONTEXT_INPUTS][256])
-{
- int i;
- int context_count = 1;
-
- for (i = 0; i < 5; i++) {
- context_count *= read_quant_table(c, quant_table[i], context_count);
- if (context_count > 32768U) {
- return -1;
- }
- }
- return (context_count + 1) / 2;
-}
-
-static int read_extra_header(FFV1Context *f)
-{
- RangeCoder *const c = &f->c;
- uint8_t state[CONTEXT_SIZE];
- int i, j, k;
- uint8_t state2[32][CONTEXT_SIZE];
-
- memset(state2, 128, sizeof(state2));
- memset(state, 128, sizeof(state));
-
- ff_init_range_decoder(c, f->avctx->extradata, f->avctx->extradata_size);
- ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
-
- f->version = get_symbol(c, state, 0);
- f->ac = f->avctx->coder_type = get_symbol(c, state, 0);
- if (f->ac > 1)
- for (i = 1; i < 256; i++)
- f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
- f->colorspace = get_symbol(c, state, 0); // YUV cs type
- f->avctx->bits_per_raw_sample = get_symbol(c, state, 0);
- get_rac(c, state); // no chroma = false
- f->chroma_h_shift = get_symbol(c, state, 0);
- f->chroma_v_shift = get_symbol(c, state, 0);
- get_rac(c, state); // transparency plane
- f->plane_count = 2;
- f->num_h_slices = 1 + get_symbol(c, state, 0);
- f->num_v_slices = 1 + get_symbol(c, state, 0);
-
- if (f->num_h_slices > (unsigned)f->width ||
- f->num_v_slices > (unsigned)f->height) {
- av_log(f->avctx, AV_LOG_ERROR, "too many slices\n");
- return -1;
- }
-
- f->quant_table_count = get_symbol(c, state, 0);
-
- if (f->quant_table_count > (unsigned)MAX_QUANT_TABLES)
- return -1;
-
- for (i = 0; i < f->quant_table_count; i++) {
- f->context_count[i] = read_quant_tables(c, f->quant_tables[i]);
- if (f->context_count[i] < 0) {
- av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
- return -1;
- }
- }
-
- if (allocate_initial_states(f) < 0)
- return AVERROR(ENOMEM);
-
- for (i = 0; i < f->quant_table_count; i++)
- if (get_rac(c, state))
- for (j = 0; j < f->context_count[i]; j++)
- for (k = 0; k < CONTEXT_SIZE; k++) {
- int pred = j ? f->initial_states[i][j - 1][k] : 128;
- f->initial_states[i][j][k] =
- (pred + get_symbol(c, state2[k], 1)) & 0xFF;
- }
- return 0;
-}
-
-static int read_header(FFV1Context *f)
-{
- uint8_t state[CONTEXT_SIZE];
- int i, j, context_count;
- RangeCoder *const c = &f->slice_context[0]->c;
-
- memset(state, 128, sizeof(state));
-
- if (f->version < 2) {
- f->version = get_symbol(c, state, 0);
- f->ac = f->avctx->coder_type = get_symbol(c, state, 0);
- if (f->ac > 1)
- for (i = 1; i < 256; i++)
- f->state_transition[i] = get_symbol(c, state, 1) + c->one_state[i];
- f->colorspace = get_symbol(c, state, 0); // YUV cs type
- if (f->version > 0)
- f->avctx->bits_per_raw_sample = get_symbol(c, state, 0);
- get_rac(c, state); // no chroma = false
- f->chroma_h_shift = get_symbol(c, state, 0);
- f->chroma_v_shift = get_symbol(c, state, 0);
- get_rac(c, state); // transparency plane
- f->plane_count = 2;
- }
-
- if (f->colorspace == 0) {
- if (f->avctx->bits_per_raw_sample <= 8) {
- switch (16 * f->chroma_h_shift + f->chroma_v_shift) {
- case 0x00:
- f->avctx->pix_fmt = AV_PIX_FMT_YUV444P;
- break;
- case 0x10:
- f->avctx->pix_fmt = AV_PIX_FMT_YUV422P;
- break;
- case 0x11:
- f->avctx->pix_fmt = AV_PIX_FMT_YUV420P;
- break;
- case 0x20:
- f->avctx->pix_fmt = AV_PIX_FMT_YUV411P;
- break;
- case 0x22:
- f->avctx->pix_fmt = AV_PIX_FMT_YUV410P;
- break;
- default:
- av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
- return -1;
- }
- } else {
- switch (16 * f->chroma_h_shift + f->chroma_v_shift) {
- case 0x00:
- f->avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
- break;
- case 0x10:
- f->avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
- break;
- case 0x11:
- f->avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
- break;
- default:
- av_log(f->avctx, AV_LOG_ERROR, "format not supported\n");
- return -1;
- }
- }
- } else if (f->colorspace == 1) {
- if (f->chroma_h_shift || f->chroma_v_shift) {
- av_log(f->avctx, AV_LOG_ERROR,
- "chroma subsampling not supported in this colorspace\n");
- return -1;
- }
- f->avctx->pix_fmt = AV_PIX_FMT_RGB32;
- } else {
- av_log(f->avctx, AV_LOG_ERROR, "colorspace not supported\n");
- return -1;
- }
-
- av_dlog(f->avctx, "%d %d %d\n",
- f->chroma_h_shift, f->chroma_v_shift, f->avctx->pix_fmt);
-
- if (f->version < 2) {
- context_count = read_quant_tables(c, f->quant_table);
- if (context_count < 0) {
- av_log(f->avctx, AV_LOG_ERROR, "read_quant_table error\n");
- return -1;
- }
- } else {
- f->slice_count = get_symbol(c, state, 0);
- if (f->slice_count > (unsigned)MAX_SLICES)
- return -1;
- }
-
- for (j = 0; j < f->slice_count; j++) {
- FFV1Context *fs = f->slice_context[j];
- fs->ac = f->ac;
-
- if (f->version >= 2) {
- fs->slice_x = get_symbol(c, state, 0) * f->width;
- fs->slice_y = get_symbol(c, state, 0) * f->height;
- fs->slice_width = (get_symbol(c, state, 0) + 1) * f->width + fs->slice_x;
- fs->slice_height = (get_symbol(c, state, 0) + 1) * f->height + fs->slice_y;
-
- fs->slice_x /= f->num_h_slices;
- fs->slice_y /= f->num_v_slices;
- fs->slice_width = fs->slice_width / f->num_h_slices - fs->slice_x;
- fs->slice_height = fs->slice_height / f->num_v_slices - fs->slice_y;
- if ((unsigned)fs->slice_width > f->width ||
- (unsigned)fs->slice_height > f->height)
- return -1;
- if ((unsigned)fs->slice_x + (uint64_t)fs->slice_width > f->width ||
- (unsigned)fs->slice_y + (uint64_t)fs->slice_height > f->height)
- return -1;
- }
-
- for (i = 0; i < f->plane_count; i++) {
- PlaneContext *const p = &fs->plane[i];
-
- if (f->version >= 2) {
- int idx = get_symbol(c, state, 0);
- if (idx > (unsigned)f->quant_table_count) {
- av_log(f->avctx, AV_LOG_ERROR,
- "quant_table_index out of range\n");
- return -1;
- }
- p->quant_table_index = idx;
- memcpy(p->quant_table, f->quant_tables[idx],
- sizeof(p->quant_table));
- context_count = f->context_count[idx];
- } else {
- memcpy(p->quant_table, f->quant_table, sizeof(p->quant_table));
- }
-
- if (p->context_count < context_count) {
- av_freep(&p->state);
- av_freep(&p->vlc_state);
- }
- p->context_count = context_count;
- }
- }
-
- return 0;
-}
-
-static av_cold int decode_init(AVCodecContext *avctx)
-{
- FFV1Context *f = avctx->priv_data;
-
- common_init(avctx);
-
- if (avctx->extradata && read_extra_header(f) < 0)
- return -1;
-
- if (init_slice_contexts(f) < 0)
- return -1;
-
- return 0;
-}
-
-static int decode_frame(AVCodecContext *avctx, void *data,
- int *data_size, AVPacket *avpkt)
-{
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- FFV1Context *f = avctx->priv_data;
- RangeCoder *const c = &f->slice_context[0]->c;
- AVFrame *const p = &f->picture;
- int bytes_read, i;
- uint8_t keystate = 128;
- const uint8_t *buf_p;
-
- AVFrame *picture = data;
-
- /* release previously stored data */
- if (p->data[0])
- avctx->release_buffer(avctx, p);
-
- ff_init_range_decoder(c, buf, buf_size);
- ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
-
- p->pict_type = AV_PICTURE_TYPE_I; // FIXME: I vs. P
- if (get_rac(c, &keystate)) {
- p->key_frame = 1;
- if (read_header(f) < 0)
- return -1;
- if (init_slice_state(f) < 0)
- return -1;
-
- clear_state(f);
- } else {
- p->key_frame = 0;
- }
- if (f->ac > 1) {
- int i;
- for (i = 1; i < 256; i++) {
- c->one_state[i] = f->state_transition[i];
- c->zero_state[256 - i] = 256 - c->one_state[i];
- }
- }
-
- p->reference = 0;
- if (avctx->get_buffer(avctx, p) < 0) {
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
- }
-
- if (avctx->debug & FF_DEBUG_PICT_INFO)
- av_log(avctx, AV_LOG_ERROR, "keyframe:%d coder:%d\n", p->key_frame, f->ac);
-
- if (!f->ac) {
- bytes_read = c->bytestream - c->bytestream_start - 1;
- if (bytes_read == 0)
- av_log(avctx, AV_LOG_ERROR, "error at end of AC stream\n"); // FIXME
- init_get_bits(&f->slice_context[0]->gb, buf + bytes_read,
- (buf_size - bytes_read) * 8);
- } else {
- bytes_read = 0; /* avoid warning */
- }
-
- buf_p = buf + buf_size;
- for (i = f->slice_count - 1; i > 0; i--) {
- FFV1Context *fs = f->slice_context[i];
- int v = AV_RB24(buf_p - 3) + 3;
- if (buf_p - buf <= v) {
- av_log(avctx, AV_LOG_ERROR, "Slice pointer chain broken\n");
- return -1;
- }
- buf_p -= v;
- if (fs->ac)
- ff_init_range_decoder(&fs->c, buf_p, v);
- else
- init_get_bits(&fs->gb, buf_p, v * 8);
- }
-
- avctx->execute(avctx, decode_slice, &f->slice_context[0],
- NULL, f->slice_count, sizeof(void *));
- f->picture_number++;
-
- *picture = *p;
- *data_size = sizeof(AVFrame);
-
- return buf_size;
-}
-
-AVCodec ff_ffv1_decoder = {
- .name = "ffv1",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_FFV1,
- .priv_data_size = sizeof(FFV1Context),
- .init = decode_init,
- .close = common_end,
- .decode = decode_frame,
- .capabilities = CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/ |
- CODEC_CAP_SLICE_THREADS,
- .long_name = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
-};
-
-#if CONFIG_FFV1_ENCODER
-AVCodec ff_ffv1_encoder = {
- .name = "ffv1",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_FFV1,
- .priv_data_size = sizeof(FFV1Context),
- .init = encode_init,
- .encode2 = encode_frame,
- .close = common_end,
- .capabilities = CODEC_CAP_SLICE_THREADS,
- .pix_fmts = (const enum AVPixelFormat[]) {
- AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
- AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
- AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
- AV_PIX_FMT_RGB32,
- AV_PIX_FMT_NONE
- },
- .long_name = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
-};
-#endif
projects / ffmpeg / blobdiff