/* * FFV1 codec for libavcodec * * Copyright (c) 2003 Michael Niedermayer * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * FF Video Codec 1 (a lossless codec) */ #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" #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] = { 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, 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, 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, -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, -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] = { 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, 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, 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, -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, -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] = { 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, 3, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -3, -3, -3, -3, -3, -3, -3, -3, -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, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -1, -1, -1, -1, -1, -1, -1, -1, -0, -0, -0, -0, }; static const int8_t 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -5, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -4, -3, -3, -3, -3, -3, -3, -3, -2, -2, -2, -1, }; static const uint8_t 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, 53, 74, 55, 57, 58, 58, 74, 60, 101, 61, 62, 84, 66, 66, 68, 69, 87, 82, 71, 97, 73, 73, 82, 75, 111, 77, 94, 78, 87, 81, 83, 97, 85, 83, 94, 86, 99, 89, 90, 99, 111, 92, 93, 134, 95, 98, 105, 98, 105, 110, 102, 108, 102, 118, 103, 106, 106, 113, 109, 112, 114, 112, 116, 125, 115, 116, 117, 117, 126, 119, 125, 121, 121, 123, 145, 124, 126, 131, 127, 129, 165, 130, 132, 138, 133, 135, 145, 136, 137, 139, 146, 141, 143, 142, 144, 148, 147, 155, 151, 149, 151, 150, 152, 157, 153, 154, 156, 168, 158, 162, 161, 160, 172, 163, 169, 164, 166, 184, 167, 170, 177, 174, 171, 173, 182, 176, 180, 178, 175, 189, 179, 181, 186, 183, 192, 185, 200, 187, 191, 188, 190, 197, 193, 196, 197, 194, 195, 196, 198, 202, 199, 201, 210, 203, 207, 204, 205, 206, 208, 214, 209, 211, 221, 212, 213, 215, 224, 216, 217, 218, 219, 220, 222, 228, 223, 225, 226, 224, 227, 229, 240, 230, 231, 232, 233, 234, 235, 236, 238, 239, 237, 242, 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) { FFV1Context *s = avctx->priv_data; s->avctx = avctx; s->flags = avctx->flags; ff_dsputil_init(&s->dsp, avctx); 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 i, 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]; 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]; } } } return 0; } static av_cold int init_slice_contexts(FFV1Context *f) { int i; f->slice_count = f->num_h_slices * f->num_v_slices; for (i = 0; i < f->slice_count; i++) { FFV1Context *fs = av_mallocz(sizeof(*fs)); int sx = i % f->num_h_slices; int sy = i / f->num_h_slices; int sxs = f->avctx->width * sx / f->num_h_slices; int sxe = f->avctx->width * (sx + 1) / f->num_h_slices; int sys = f->avctx->height * sy / f->num_v_slices; int sye = f->avctx->height * (sy + 1) / f->num_v_slices; f->slice_context[i] = fs; memcpy(fs, f, sizeof(*fs)); memset(fs->rc_stat2, 0, sizeof(fs->rc_stat2)); fs->slice_width = sxe - sxs; fs->slice_height = sye - sys; fs->slice_x = sxs; fs->slice_y = sys; fs->sample_buffer = av_malloc(9 * (fs->width + 6) * sizeof(*fs->sample_buffer)); if (!fs->sample_buffer) return AVERROR(ENOMEM); } return 0; } static int allocate_initial_states(FFV1Context *f) { int i; for (i = 0; i < f->quant_table_count; i++) { f->initial_states[i] = av_malloc(f->context_count[i] * sizeof(*f->initial_states[i])); if (!f->initial_states[i]) return AVERROR(ENOMEM); memset(f->initial_states[i], 128, f->context_count[i] * sizeof(*f->initial_states[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) { 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]; } } 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; 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; if (fs->ac) { uint8_t state = 128; put_rac(&fs->c, &state, 0); bytes = ff_rac_terminate(&fs->c); } 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 (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) { 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++) { PlaneContext *p = &fs->plane[i]; av_freep(&p->state); av_freep(&p->vlc_state); } av_freep(&fs->sample_buffer); } av_freep(&avctx->stats_out); for (j = 0; j < s->quant_table_count; j++) { av_freep(&s->initial_states[j]); for (i = 0; i < s->slice_count; i++) { FFV1Context *sf = s->slice_context[i]; av_freep(&sf->rc_stat2[j]); } av_freep(&s->rc_stat2[j]); } for (i = 0; i < s->slice_count; i++) av_freep(&s->slice_context[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