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* FFV1 encoder for libavcodec
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* Copyright (c) 2003-2012 Michael Niedermayer <michaelni@gmx.at>
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* This file is part of Libav.
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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* FF Video Codec 1 (a lossless codec) encoder
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#include "libavutil/avassert.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/crc.h"
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#include "libavutil/opt.h"
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#include "libavutil/imgutils.h"
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#include "rangecoder.h"
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static void find_best_state(uint8_t best_state[256][256],
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const uint8_t one_state[256])
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for (i = 1; i < 256; i++)
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l2tab[i] = log2(i / 256.0);
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for (i = 0; i < 256; i++) {
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for (j = 0; j < 256; j++)
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best_len[j] = 1 << 30;
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for (j = FFMAX(i - 10, 1); j < FFMIN(i + 11, 256); j++) {
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double occ[256] = { 0 };
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for (k = 0; k < 256; k++) {
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double newocc[256] = { 0 };
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for (m = 1; m < 256; m++)
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len -= occ[m] * (p * l2tab[m] +
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(1 - p) * l2tab[256 - m]);
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if (len < best_len[k]) {
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for (m = 0; m < 256; m++)
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newocc[one_state[m]] += occ[m] * p;
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newocc[256 - one_state[256 - m]] += occ[m] * (1 - p);
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memcpy(occ, newocc, sizeof(occ));
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static av_always_inline av_flatten void put_symbol_inline(RangeCoder *c,
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uint8_t *state, int v,
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uint64_t rc_stat[256][2],
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uint64_t rc_stat2[32][2])
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#define put_rac(C, S, B) \
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rc_stat2[(S) - state][B]++; \
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const int a = FFABS(v);
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const int e = av_log2(a);
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put_rac(c, state + 0, 0);
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for (i = 0; i < e; i++)
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put_rac(c, state + 1 + i, 1); // 1..10
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put_rac(c, state + 1 + i, 0);
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for (i = e - 1; i >= 0; i--)
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put_rac(c, state + 22 + i, (a >> i) & 1); // 22..31
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put_rac(c, state + 11 + e, v < 0); // 11..21
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for (i = 0; i < e; i++)
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put_rac(c, state + 1 + FFMIN(i, 9), 1); // 1..10
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put_rac(c, state + 1 + 9, 0);
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for (i = e - 1; i >= 0; i--)
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put_rac(c, state + 22 + FFMIN(i, 9), (a >> i) & 1); // 22..31
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put_rac(c, state + 11 + 10, v < 0); // 11..21
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put_rac(c, state + 0, 1);
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static av_noinline void put_symbol(RangeCoder *c, uint8_t *state,
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int v, int is_signed)
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put_symbol_inline(c, state, v, is_signed, NULL, NULL);
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static inline void put_vlc_symbol(PutBitContext *pb, VlcState *const state,
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v = fold(v - state->bias, bits);
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while (i < state->error_sum) { // FIXME: optimize
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if (k == 0 && 2 * state->drift <= -state->count)
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code = v ^ ((2 * state->drift + state->count) >> 31);
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av_dlog(NULL, "v:%d/%d bias:%d error:%d drift:%d count:%d k:%d\n", v, code,
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state->bias, state->error_sum, state->drift, state->count, k);
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set_sr_golomb(pb, code, k, 12, bits);
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update_vlc_state(state, v);
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static av_always_inline int encode_line(FFV1Context *s, int w,
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int plane_index, int bits)
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PlaneContext *const p = &s->plane[plane_index];
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RangeCoder *const c = &s->c;
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int run_index = s->run_index;
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if (c->bytestream_end - c->bytestream < w * 20) {
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av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
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return AVERROR_INVALIDDATA;
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if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) < w * 4) {
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av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
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return AVERROR_INVALIDDATA;
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for (x = 0; x < w; x++) {
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context = get_context(p, sample[0] + x, sample[1] + x, sample[2] + x);
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diff = sample[0][x] - predict(sample[0] + x, sample[1] + x);
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diff = fold(diff, bits);
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if (s->flags & CODEC_FLAG_PASS1) {
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put_symbol_inline(c, p->state[context], diff, 1, s->rc_stat,
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s->rc_stat2[p->quant_table_index][context]);
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put_symbol_inline(c, p->state[context], diff, 1, NULL, NULL);
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while (run_count >= 1 << ff_log2_run[run_index]) {
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run_count -= 1 << ff_log2_run[run_index];
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put_bits(&s->pb, 1, 1);
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put_bits(&s->pb, 1 + ff_log2_run[run_index], run_count);
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av_dlog(s->avctx, "count:%d index:%d, mode:%d, x:%d pos:%d\n",
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run_count, run_index, run_mode, x,
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(int)put_bits_count(&s->pb));
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put_vlc_symbol(&s->pb, &p->vlc_state[context], diff, bits);
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while (run_count >= 1 << ff_log2_run[run_index]) {
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run_count -= 1 << ff_log2_run[run_index];
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put_bits(&s->pb, 1, 1);
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put_bits(&s->pb, 1, 1);
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s->run_index = run_index;
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static void encode_plane(FFV1Context *s, uint8_t *src, int w, int h,
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int stride, int plane_index)
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const int ring_size = s->avctx->context_model ? 3 : 2;
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memset(s->sample_buffer, 0, ring_size * (w + 6) * sizeof(*s->sample_buffer));
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for (y = 0; y < h; y++) {
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for (i = 0; i < ring_size; i++)
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sample[i] = s->sample_buffer + (w + 6) * ((h + i - y) % ring_size) + 3;
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sample[0][-1] = sample[1][0];
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sample[1][w] = sample[1][w - 1];
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if (s->bits_per_raw_sample <= 8) {
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for (x = 0; x < w; x++)
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sample[0][x] = src[x + stride * y];
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encode_line(s, w, sample, plane_index, 8);
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if (s->packed_at_lsb) {
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for (x = 0; x < w; x++)
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sample[0][x] = ((uint16_t *)(src + stride * y))[x];
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for (x = 0; x < w; x++)
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((uint16_t *)(src + stride * y))[x] >> (16 - s->bits_per_raw_sample);
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encode_line(s, w, sample, plane_index, s->bits_per_raw_sample);
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// STOP_TIMER("encode line") }
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static void encode_rgb_frame(FFV1Context *s, uint8_t *src[3], int w, int h,
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const int ring_size = s->avctx->context_model ? 3 : 2;
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int16_t *sample[MAX_PLANES][3];
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int lbd = s->avctx->bits_per_raw_sample <= 8;
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int bits = s->avctx->bits_per_raw_sample > 0
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? s->avctx->bits_per_raw_sample
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int offset = 1 << bits;
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memset(s->sample_buffer, 0, ring_size * MAX_PLANES *
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(w + 6) * sizeof(*s->sample_buffer));
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for (y = 0; y < h; y++) {
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for (i = 0; i < ring_size; i++)
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for (p = 0; p < MAX_PLANES; p++)
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sample[p][i] = s->sample_buffer + p * ring_size *
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((h + i - y) % ring_size) * (w + 6) + 3;
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for (x = 0; x < w; x++) {
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int b, g, r, av_uninit(a);
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unsigned v = *((uint32_t *)(src[0] + x * 4 + stride[0] * y));
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r = (v >> 16) & 0xFF;
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b = *((uint16_t *)(src[0] + x * 2 + stride[0] * y));
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g = *((uint16_t *)(src[1] + x * 2 + stride[1] * y));
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r = *((uint16_t *)(src[2] + x * 2 + stride[2] * y));
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for (p = 0; p < 3 + s->transparency; p++) {
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sample[p][0][-1] = sample[p][1][0];
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sample[p][1][w] = sample[p][1][w - 1];
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encode_line(s, w, sample[p], (p + 1) / 2, 9);
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encode_line(s, w, sample[p], (p + 1) / 2, bits + 1);
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static void write_quant_table(RangeCoder *c, int16_t *quant_table)
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uint8_t state[CONTEXT_SIZE];
362
memset(state, 128, sizeof(state));
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for (i = 1; i < 128; i++)
365
if (quant_table[i] != quant_table[i - 1]) {
366
put_symbol(c, state, i - last - 1, 0);
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put_symbol(c, state, i - last - 1, 0);
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static void write_quant_tables(RangeCoder *c,
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int16_t quant_table[MAX_CONTEXT_INPUTS][256])
376
for (i = 0; i < 5; i++)
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write_quant_table(c, quant_table[i]);
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static void write_header(FFV1Context *f)
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uint8_t state[CONTEXT_SIZE];
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RangeCoder *const c = &f->slice_context[0]->c;
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memset(state, 128, sizeof(state));
388
if (f->version < 2) {
389
put_symbol(c, state, f->version, 0);
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put_symbol(c, state, f->ac, 0);
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for (i = 1; i < 256; i++)
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f->state_transition[i] - c->one_state[i], 1);
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put_symbol(c, state, f->colorspace, 0); // YUV cs type
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put_symbol(c, state, f->bits_per_raw_sample, 0);
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put_rac(c, state, f->chroma_planes);
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put_symbol(c, state, f->chroma_h_shift, 0);
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put_symbol(c, state, f->chroma_v_shift, 0);
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put_rac(c, state, f->transparency);
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write_quant_tables(c, f->quant_table);
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} else if (f->version < 3) {
406
put_symbol(c, state, f->slice_count, 0);
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for (i = 0; i < f->slice_count; i++) {
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FFV1Context *fs = f->slice_context[i];
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(fs->slice_x + 1) * f->num_h_slices / f->width, 0);
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(fs->slice_y + 1) * f->num_v_slices / f->height, 0);
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(fs->slice_width + 1) * f->num_h_slices / f->width - 1,
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(fs->slice_height + 1) * f->num_v_slices / f->height - 1,
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for (j = 0; j < f->plane_count; j++) {
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put_symbol(c, state, f->plane[j].quant_table_index, 0);
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av_assert0(f->plane[j].quant_table_index == f->avctx->context_model);
427
static int write_extradata(FFV1Context *f)
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RangeCoder *const c = &f->c;
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uint8_t state[CONTEXT_SIZE];
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uint8_t state2[32][CONTEXT_SIZE];
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memset(state2, 128, sizeof(state2));
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memset(state, 128, sizeof(state));
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f->avctx->extradata_size = 10000 + 4 +
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(11 * 11 * 5 * 5 * 5 + 11 * 11 * 11) * 32;
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f->avctx->extradata = av_malloc(f->avctx->extradata_size);
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ff_init_range_encoder(c, f->avctx->extradata, f->avctx->extradata_size);
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ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
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put_symbol(c, state, f->version, 0);
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if (f->version > 2) {
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f->minor_version = 2;
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put_symbol(c, state, f->minor_version, 0);
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put_symbol(c, state, f->ac, 0);
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for (i = 1; i < 256; i++)
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put_symbol(c, state, f->state_transition[i] - c->one_state[i], 1);
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put_symbol(c, state, f->colorspace, 0); // YUV cs type
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put_symbol(c, state, f->bits_per_raw_sample, 0);
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put_rac(c, state, f->chroma_planes);
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put_symbol(c, state, f->chroma_h_shift, 0);
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put_symbol(c, state, f->chroma_v_shift, 0);
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put_rac(c, state, f->transparency);
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put_symbol(c, state, f->num_h_slices - 1, 0);
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put_symbol(c, state, f->num_v_slices - 1, 0);
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put_symbol(c, state, f->quant_table_count, 0);
466
for (i = 0; i < f->quant_table_count; i++)
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write_quant_tables(c, f->quant_tables[i]);
469
for (i = 0; i < f->quant_table_count; i++) {
470
for (j = 0; j < f->context_count[i] * CONTEXT_SIZE; j++)
471
if (f->initial_states[i] && f->initial_states[i][0][j] != 128)
473
if (j < f->context_count[i] * CONTEXT_SIZE) {
474
put_rac(c, state, 1);
475
for (j = 0; j < f->context_count[i]; j++)
476
for (k = 0; k < CONTEXT_SIZE; k++) {
477
int pred = j ? f->initial_states[i][j - 1][k] : 128;
478
put_symbol(c, state2[k],
479
(int8_t)(f->initial_states[i][j][k] - pred), 1);
482
put_rac(c, state, 0);
486
if (f->version > 2) {
487
put_symbol(c, state, f->ec, 0);
490
f->avctx->extradata_size = ff_rac_terminate(c);
492
v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0,
493
f->avctx->extradata, f->avctx->extradata_size);
494
AV_WL32(f->avctx->extradata + f->avctx->extradata_size, v);
495
f->avctx->extradata_size += 4;
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static int sort_stt(FFV1Context *s, uint8_t stt[256])
502
int i, i2, changed, print = 0;
506
for (i = 12; i < 244; i++) {
507
for (i2 = i + 1; i2 < 245 && i2 < i + 4; i2++) {
509
#define COST(old, new) \
510
s->rc_stat[old][0] * -log2((256 - (new)) / 256.0) + \
511
s->rc_stat[old][1] * -log2((new) / 256.0)
513
#define COST2(old, new) \
514
COST(old, new) + COST(256 - (old), 256 - (new))
516
double size0 = COST2(i, i) + COST2(i2, i2);
517
double sizeX = COST2(i, i2) + COST2(i2, i);
518
if (sizeX < size0 && i != 128 && i2 != 128) {
520
FFSWAP(int, stt[i], stt[i2]);
521
FFSWAP(int, s->rc_stat[i][0], s->rc_stat[i2][0]);
522
FFSWAP(int, s->rc_stat[i][1], s->rc_stat[i2][1]);
524
FFSWAP(int, stt[256 - i], stt[256 - i2]);
525
FFSWAP(int, s->rc_stat[256 - i][0], s->rc_stat[256 - i2][0]);
526
FFSWAP(int, s->rc_stat[256 - i][1], s->rc_stat[256 - i2][1]);
528
for (j = 1; j < 256; j++) {
531
else if (stt[j] == i2)
534
if (stt[256 - j] == 256 - i)
535
stt[256 - j] = 256 - i2;
536
else if (stt[256 - j] == 256 - i2)
537
stt[256 - j] = 256 - i;
548
static int init_slices_state(FFV1Context *f)
551
for (i = 0; i < f->slice_count; i++) {
552
FFV1Context *fs = f->slice_context[i];
553
if ((ret = ffv1_init_slice_state(f, fs)) < 0)
554
return AVERROR(ENOMEM);
559
static av_cold int ffv1_encode_init(AVCodecContext *avctx)
561
FFV1Context *s = avctx->priv_data;
562
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
565
ffv1_common_init(avctx);
569
if ((avctx->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) ||
571
s->version = FFMAX(s->version, 2);
573
if (avctx->level == 3) {
578
s->ec = (s->version >= 3);
581
if (s->version >= 2 &&
582
avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
583
av_log(avctx, AV_LOG_ERROR,
584
"Version %d requested, please set -strict experimental in "
585
"order to enable it\n",
587
return AVERROR(ENOSYS);
590
s->ac = avctx->coder_type > 0 ? 2 : 0;
593
switch (avctx->pix_fmt) {
594
case AV_PIX_FMT_YUV444P9:
595
case AV_PIX_FMT_YUV422P9:
596
case AV_PIX_FMT_YUV420P9:
597
if (!avctx->bits_per_raw_sample)
598
s->bits_per_raw_sample = 9;
599
case AV_PIX_FMT_YUV444P10:
600
case AV_PIX_FMT_YUV420P10:
601
case AV_PIX_FMT_YUV422P10:
602
s->packed_at_lsb = 1;
603
if (!avctx->bits_per_raw_sample && !s->bits_per_raw_sample)
604
s->bits_per_raw_sample = 10;
605
case AV_PIX_FMT_GRAY16:
606
case AV_PIX_FMT_YUV444P16:
607
case AV_PIX_FMT_YUV422P16:
608
case AV_PIX_FMT_YUV420P16:
609
if (!avctx->bits_per_raw_sample && !s->bits_per_raw_sample) {
610
s->bits_per_raw_sample = 16;
611
} else if (!s->bits_per_raw_sample) {
612
s->bits_per_raw_sample = avctx->bits_per_raw_sample;
614
if (s->bits_per_raw_sample <= 8) {
615
av_log(avctx, AV_LOG_ERROR, "bits_per_raw_sample invalid\n");
616
return AVERROR_INVALIDDATA;
618
if (!s->ac && avctx->coder_type == -1) {
619
av_log(avctx, AV_LOG_INFO,
620
"bits_per_raw_sample > 8, forcing coder 1\n");
626
"bits_per_raw_sample of more than 8 needs -coder 1 currently\n");
627
return AVERROR_INVALIDDATA;
629
s->version = FFMAX(s->version, 1);
630
case AV_PIX_FMT_GRAY8:
631
case AV_PIX_FMT_YUV444P:
632
case AV_PIX_FMT_YUV440P:
633
case AV_PIX_FMT_YUV422P:
634
case AV_PIX_FMT_YUV420P:
635
case AV_PIX_FMT_YUV411P:
636
case AV_PIX_FMT_YUV410P:
637
s->chroma_planes = desc->nb_components < 3 ? 0 : 1;
640
case AV_PIX_FMT_YUVA444P:
641
case AV_PIX_FMT_YUVA422P:
642
case AV_PIX_FMT_YUVA420P:
643
s->chroma_planes = 1;
647
case AV_PIX_FMT_RGB32:
651
case AV_PIX_FMT_GBRP9:
652
if (!avctx->bits_per_raw_sample)
653
s->bits_per_raw_sample = 9;
654
case AV_PIX_FMT_GBRP10:
655
if (!avctx->bits_per_raw_sample && !s->bits_per_raw_sample)
656
s->bits_per_raw_sample = 10;
657
case AV_PIX_FMT_GBRP16:
658
if (!avctx->bits_per_raw_sample && !s->bits_per_raw_sample)
659
s->bits_per_raw_sample = 16;
660
else if (!s->bits_per_raw_sample)
661
s->bits_per_raw_sample = avctx->bits_per_raw_sample;
663
s->chroma_planes = 1;
664
s->version = FFMAX(s->version, 1);
667
av_log(avctx, AV_LOG_ERROR, "format not supported\n");
668
return AVERROR_INVALIDDATA;
670
if (s->transparency) {
672
avctx, AV_LOG_WARNING,
673
"Storing alpha plane, this will require a recent FFV1 decoder to playback!\n");
675
if (avctx->context_model > 1U) {
676
av_log(avctx, AV_LOG_ERROR,
677
"Invalid context model %d, valid values are 0 and 1\n",
678
avctx->context_model);
679
return AVERROR(EINVAL);
683
for (i = 1; i < 256; i++)
684
s->state_transition[i] = ffv1_ver2_state[i];
686
for (i = 0; i < 256; i++) {
687
s->quant_table_count = 2;
688
if (s->bits_per_raw_sample <= 8) {
689
s->quant_tables[0][0][i] = ffv1_quant11[i];
690
s->quant_tables[0][1][i] = ffv1_quant11[i] * 11;
691
s->quant_tables[0][2][i] = ffv1_quant11[i] * 11 * 11;
692
s->quant_tables[1][0][i] = ffv1_quant11[i];
693
s->quant_tables[1][1][i] = ffv1_quant11[i] * 11;
694
s->quant_tables[1][2][i] = ffv1_quant5[i] * 11 * 11;
695
s->quant_tables[1][3][i] = ffv1_quant5[i] * 5 * 11 * 11;
696
s->quant_tables[1][4][i] = ffv1_quant5[i] * 5 * 5 * 11 * 11;
698
s->quant_tables[0][0][i] = ffv1_quant9_10bit[i];
699
s->quant_tables[0][1][i] = ffv1_quant9_10bit[i] * 11;
700
s->quant_tables[0][2][i] = ffv1_quant9_10bit[i] * 11 * 11;
701
s->quant_tables[1][0][i] = ffv1_quant9_10bit[i];
702
s->quant_tables[1][1][i] = ffv1_quant9_10bit[i] * 11;
703
s->quant_tables[1][2][i] = ffv1_quant5_10bit[i] * 11 * 11;
704
s->quant_tables[1][3][i] = ffv1_quant5_10bit[i] * 5 * 11 * 11;
705
s->quant_tables[1][4][i] = ffv1_quant5_10bit[i] * 5 * 5 * 11 * 11;
708
s->context_count[0] = (11 * 11 * 11 + 1) / 2;
709
s->context_count[1] = (11 * 11 * 5 * 5 * 5 + 1) / 2;
710
memcpy(s->quant_table, s->quant_tables[avctx->context_model],
711
sizeof(s->quant_table));
713
for (i = 0; i < s->plane_count; i++) {
714
PlaneContext *const p = &s->plane[i];
716
memcpy(p->quant_table, s->quant_table, sizeof(p->quant_table));
717
p->quant_table_index = avctx->context_model;
718
p->context_count = s->context_count[p->quant_table_index];
721
if ((ret = ffv1_allocate_initial_states(s)) < 0)
724
avctx->coded_frame = &s->picture;
725
if (!s->transparency)
728
av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift,
731
s->picture_number = 0;
733
if (avctx->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2)) {
734
for (i = 0; i < s->quant_table_count; i++) {
735
s->rc_stat2[i] = av_mallocz(s->context_count[i] *
736
sizeof(*s->rc_stat2[i]));
738
return AVERROR(ENOMEM);
741
if (avctx->stats_in) {
742
char *p = avctx->stats_in;
743
uint8_t best_state[256][256];
747
av_assert0(s->version >= 2);
750
for (j = 0; j < 256; j++)
751
for (i = 0; i < 2; i++) {
752
s->rc_stat[j][i] = strtol(p, &next, 0);
754
av_log(avctx, AV_LOG_ERROR,
755
"2Pass file invalid at %d %d [%s]\n", j, i, p);
756
return AVERROR_INVALIDDATA;
760
for (i = 0; i < s->quant_table_count; i++)
761
for (j = 0; j < s->context_count[i]; j++) {
762
for (k = 0; k < 32; k++)
763
for (m = 0; m < 2; m++) {
764
s->rc_stat2[i][j][k][m] = strtol(p, &next, 0);
766
av_log(avctx, AV_LOG_ERROR,
767
"2Pass file invalid at %d %d %d %d [%s]\n",
769
return AVERROR_INVALIDDATA;
774
gob_count = strtol(p, &next, 0);
775
if (next == p || gob_count <= 0) {
776
av_log(avctx, AV_LOG_ERROR, "2Pass file invalid\n");
777
return AVERROR_INVALIDDATA;
780
while (*p == '\n' || *p == ' ')
785
sort_stt(s, s->state_transition);
787
find_best_state(best_state, s->state_transition);
789
for (i = 0; i < s->quant_table_count; i++) {
790
for (j = 0; j < s->context_count[i]; j++)
791
for (k = 0; k < 32; k++) {
793
if (s->rc_stat2[i][j][k][0] + s->rc_stat2[i][j][k][1]) {
794
p = 256.0 * s->rc_stat2[i][j][k][1] /
795
(s->rc_stat2[i][j][k][0] + s->rc_stat2[i][j][k][1]);
797
s->initial_states[i][j][k] =
798
best_state[av_clip(round(p), 1, 255)][av_clip((s->rc_stat2[i][j][k][0] +
799
s->rc_stat2[i][j][k][1]) /
805
if (s->version > 1) {
806
for (s->num_v_slices = 2; s->num_v_slices < 9; s->num_v_slices++)
807
for (s->num_h_slices = s->num_v_slices;
808
s->num_h_slices < 2 * s->num_v_slices; s->num_h_slices++)
809
if (avctx->slices == s->num_h_slices * s->num_v_slices &&
810
avctx->slices <= 64 || !avctx->slices)
812
av_log(avctx, AV_LOG_ERROR,
813
"Unsupported number %d of slices requested, please specify a "
814
"supported number with -slices (ex:4,6,9,12,16, ...)\n",
816
return AVERROR(ENOSYS);
821
if ((ret = ffv1_init_slice_contexts(s)) < 0)
823
if ((ret = init_slices_state(s)) < 0)
826
#define STATS_OUT_SIZE 1024 * 1024 * 6
827
if (avctx->flags & CODEC_FLAG_PASS1) {
828
avctx->stats_out = av_mallocz(STATS_OUT_SIZE);
829
for (i = 0; i < s->quant_table_count; i++)
830
for (j = 0; j < s->slice_count; j++) {
831
FFV1Context *sf = s->slice_context[j];
832
av_assert0(!sf->rc_stat2[i]);
833
sf->rc_stat2[i] = av_mallocz(s->context_count[i] *
834
sizeof(*sf->rc_stat2[i]));
835
if (!sf->rc_stat2[i])
836
return AVERROR(ENOMEM);
843
static void encode_slice_header(FFV1Context *f, FFV1Context *fs)
845
RangeCoder *c = &fs->c;
846
uint8_t state[CONTEXT_SIZE];
848
memset(state, 128, sizeof(state));
850
put_symbol(c, state, (fs->slice_x + 1) * f->num_h_slices / f->width, 0);
851
put_symbol(c, state, (fs->slice_y + 1) * f->num_v_slices / f->height, 0);
852
put_symbol(c, state, (fs->slice_width + 1) * f->num_h_slices / f->width - 1,
855
(fs->slice_height + 1) * f->num_v_slices / f->height - 1,
857
for (j = 0; j < f->plane_count; j++) {
858
put_symbol(c, state, f->plane[j].quant_table_index, 0);
859
av_assert0(f->plane[j].quant_table_index == f->avctx->context_model);
861
if (!f->picture.interlaced_frame)
862
put_symbol(c, state, 3, 0);
864
put_symbol(c, state, 1 + !f->picture.top_field_first, 0);
865
put_symbol(c, state, f->picture.sample_aspect_ratio.num, 0);
866
put_symbol(c, state, f->picture.sample_aspect_ratio.den, 0);
869
static int encode_slice(AVCodecContext *c, void *arg)
871
FFV1Context *fs = *(void **)arg;
872
FFV1Context *f = fs->avctx->priv_data;
873
int width = fs->slice_width;
874
int height = fs->slice_height;
877
AVFrame *const p = &f->picture;
878
const int ps = (av_pix_fmt_desc_get(c->pix_fmt)->flags & PIX_FMT_PLANAR)
879
? (f->bits_per_raw_sample > 8) + 1
883
ffv1_clear_slice_state(f, fs);
884
if (f->version > 2) {
885
encode_slice_header(f, fs);
889
put_rac(&fs->c, (uint8_t[]) { 129 }, 0);
890
fs->ac_byte_count = f->version > 2 || (!x && !y) ? ff_rac_terminate( &fs->c) : 0;
891
init_put_bits(&fs->pb, fs->c.bytestream_start + fs->ac_byte_count,
892
fs->c.bytestream_end - fs->c.bytestream_start - fs->ac_byte_count);
895
if (f->colorspace == 0) {
896
const int chroma_width = -((-width) >> f->chroma_h_shift);
897
const int chroma_height = -((-height) >> f->chroma_v_shift);
898
const int cx = x >> f->chroma_h_shift;
899
const int cy = y >> f->chroma_v_shift;
901
encode_plane(fs, p->data[0] + ps * x + y * p->linesize[0],
902
width, height, p->linesize[0], 0);
904
if (f->chroma_planes) {
905
encode_plane(fs, p->data[1] + ps * cx + cy * p->linesize[1],
906
chroma_width, chroma_height, p->linesize[1], 1);
907
encode_plane(fs, p->data[2] + ps * cx + cy * p->linesize[2],
908
chroma_width, chroma_height, p->linesize[2], 1);
910
if (fs->transparency)
911
encode_plane(fs, p->data[3] + ps * x + y * p->linesize[3], width,
912
height, p->linesize[3], 2);
914
uint8_t *planes[3] = { p->data[0] + ps * x + y * p->linesize[0],
915
p->data[1] + ps * x + y * p->linesize[1],
916
p->data[2] + ps * x + y * p->linesize[2] };
917
encode_rgb_frame(fs, planes, width, height, p->linesize);
924
static int ffv1_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
925
const AVFrame *pict, int *got_packet)
927
FFV1Context *f = avctx->priv_data;
928
RangeCoder *const c = &f->slice_context[0]->c;
929
AVFrame *const p = &f->picture;
931
uint8_t keystate = 128;
935
if ((ret = ff_alloc_packet(pkt, avctx->width * avctx->height *
936
((8 * 2 + 1 + 1) * 4) / 8 +
937
FF_MIN_BUFFER_SIZE)) < 0) {
938
av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
942
ff_init_range_encoder(c, pkt->data, pkt->size);
943
ff_build_rac_states(c, 0.05 * (1LL << 32), 256 - 8);
946
p->pict_type = AV_PICTURE_TYPE_I;
948
if (avctx->gop_size == 0 || f->picture_number % avctx->gop_size == 0) {
949
put_rac(c, &keystate, 1);
954
put_rac(c, &keystate, 0);
960
for (i = 1; i < 256; i++) {
961
c->one_state[i] = f->state_transition[i];
962
c->zero_state[256 - i] = 256 - c->one_state[i];
966
for (i = 1; i < f->slice_count; i++) {
967
FFV1Context *fs = f->slice_context[i];
968
uint8_t *start = pkt->data +
969
(pkt->size - used_count) * (int64_t)i / f->slice_count;
970
int len = pkt->size / f->slice_count;
971
ff_init_range_encoder(&fs->c, start, len);
973
avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL,
974
f->slice_count, sizeof(void *));
977
for (i = 0; i < f->slice_count; i++) {
978
FFV1Context *fs = f->slice_context[i];
983
put_rac(&fs->c, &state, 0);
984
bytes = ff_rac_terminate(&fs->c);
986
flush_put_bits(&fs->pb); // FIXME: nicer padding
987
bytes = fs->ac_byte_count + (put_bits_count(&fs->pb) + 7) / 8;
989
if (i > 0 || f->version > 2) {
990
av_assert0(bytes < pkt->size / f->slice_count);
991
memmove(buf_p, fs->c.bytestream_start, bytes);
992
av_assert0(bytes < (1 << 24));
993
AV_WB24(buf_p + bytes, bytes);
999
v = av_crc(av_crc_get_table(AV_CRC_32_IEEE), 0, buf_p, bytes);
1000
AV_WL32(buf_p + bytes, v);
1006
if ((avctx->flags & CODEC_FLAG_PASS1) && (f->picture_number & 31) == 0) {
1008
char *p = avctx->stats_out;
1009
char *end = p + STATS_OUT_SIZE;
1011
memset(f->rc_stat, 0, sizeof(f->rc_stat));
1012
for (i = 0; i < f->quant_table_count; i++)
1013
memset(f->rc_stat2[i], 0, f->context_count[i] * sizeof(*f->rc_stat2[i]));
1015
for (j = 0; j < f->slice_count; j++) {
1016
FFV1Context *fs = f->slice_context[j];
1017
for (i = 0; i < 256; i++) {
1018
f->rc_stat[i][0] += fs->rc_stat[i][0];
1019
f->rc_stat[i][1] += fs->rc_stat[i][1];
1021
for (i = 0; i < f->quant_table_count; i++) {
1022
for (k = 0; k < f->context_count[i]; k++)
1023
for (m = 0; m < 32; m++) {
1024
f->rc_stat2[i][k][m][0] += fs->rc_stat2[i][k][m][0];
1025
f->rc_stat2[i][k][m][1] += fs->rc_stat2[i][k][m][1];
1030
for (j = 0; j < 256; j++) {
1031
snprintf(p, end - p, "%" PRIu64 " %" PRIu64 " ",
1032
f->rc_stat[j][0], f->rc_stat[j][1]);
1035
snprintf(p, end - p, "\n");
1037
for (i = 0; i < f->quant_table_count; i++) {
1038
for (j = 0; j < f->context_count[i]; j++)
1039
for (m = 0; m < 32; m++) {
1040
snprintf(p, end - p, "%" PRIu64 " %" PRIu64 " ",
1041
f->rc_stat2[i][j][m][0], f->rc_stat2[i][j][m][1]);
1045
snprintf(p, end - p, "%d\n", f->gob_count);
1046
} else if (avctx->flags & CODEC_FLAG_PASS1)
1047
avctx->stats_out[0] = '\0';
1049
f->picture_number++;
1050
pkt->size = buf_p - pkt->data;
1051
pkt->flags |= AV_PKT_FLAG_KEY * p->key_frame;
1057
#define OFFSET(x) offsetof(FFV1Context, x)
1058
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1059
static const AVOption options[] = {
1060
{ "slicecrc", "Protect slices with CRCs", OFFSET(ec), AV_OPT_TYPE_INT,
1061
{ .i64 = -1 }, -1, 1, VE },
1065
static const AVClass class = {
1066
.class_name = "ffv1 encoder",
1067
.item_name = av_default_item_name,
1069
.version = LIBAVUTIL_VERSION_INT,
1072
static const AVCodecDefault ffv1_defaults[] = {
1077
AVCodec ff_ffv1_encoder = {
1079
.type = AVMEDIA_TYPE_VIDEO,
1080
.id = AV_CODEC_ID_FFV1,
1081
.priv_data_size = sizeof(FFV1Context),
1082
.init = ffv1_encode_init,
1083
.encode2 = ffv1_encode_frame,
1084
.close = ffv1_close,
1085
.capabilities = CODEC_CAP_SLICE_THREADS,
1086
.pix_fmts = (const enum AVPixelFormat[]) {
1087
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
1088
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
1089
AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV420P9,
1090
AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
1091
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
1093
AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
1094
AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
1095
AV_PIX_FMT_GRAY16, AV_PIX_FMT_GRAY8,
1099
.long_name = NULL_IF_CONFIG_SMALL("FFmpeg video codec #1"),
1100
.defaults = ffv1_defaults,
1101
.priv_class = &class,