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/*
* FFV1 encoder template
*
* Copyright (c) 2003-2016 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
static av_always_inline int RENAME(encode_line)(FFV1Context *s, int w,
TYPE *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 != AC_GOLOMB_RICE) {
if (c->bytestream_end - c->bytestream < w * 35) {
av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
return AVERROR_INVALIDDATA;
}
} 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 AVERROR_INVALIDDATA;
}
}
if (s->slice_coding_mode == 1) {
for (x = 0; x < w; x++) {
int i;
int v = sample[0][x];
for (i = bits-1; i>=0; i--) {
uint8_t state = 128;
put_rac(c, &state, (v>>i) & 1);
}
}
return 0;
}
for (x = 0; x < w; x++) {
int diff, context;
context = RENAME(get_context)(p, sample[0] + x, sample[1] + x, sample[2] + x);
diff = sample[0][x] - RENAME(predict)(sample[0] + x, sample[1] + x);
if (context < 0) {
context = -context;
diff = -diff;
}
diff = fold(diff, bits);
if (s->ac != AC_GOLOMB_RICE) {
if (s->flags & AV_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++;
}
}
ff_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 int RENAME(encode_rgb_frame)(FFV1Context *s, const uint8_t *src[3],
int w, int h, const int stride[3])
{
int x, y, p, i;
const int ring_size = s->context_model ? 3 : 2;
TYPE *sample[4][3];
int lbd = s->bits_per_raw_sample <= 8;
int bits = s->bits_per_raw_sample > 0 ? s->bits_per_raw_sample : 8;
int offset = 1 << bits;
s->run_index = 0;
memset(RENAME(s->sample_buffer), 0, ring_size * MAX_PLANES *
(w + 6) * sizeof(*RENAME(s->sample_buffer)));
for (y = 0; y < h; y++) {
for (i = 0; i < ring_size; i++)
for (p = 0; p < MAX_PLANES; p++)
sample[p][i]= RENAME(s->sample_buffer) + p*ring_size*(w+6) + ((h+i-y)%ring_size)*(w+6) + 3;
for (x = 0; x < w; x++) {
int b, g, r, av_uninit(a);
if (lbd) {
unsigned v = *((const uint32_t*)(src[0] + x*4 + stride[0]*y));
b = v & 0xFF;
g = (v >> 8) & 0xFF;
r = (v >> 16) & 0xFF;
a = v >> 24;
} else {
b = *((const uint16_t *)(src[0] + x*2 + stride[0]*y));
g = *((const uint16_t *)(src[1] + x*2 + stride[1]*y));
r = *((const uint16_t *)(src[2] + x*2 + stride[2]*y));
}
if (s->slice_coding_mode != 1) {
b -= g;
r -= g;
g += (b * s->slice_rct_by_coef + r * s->slice_rct_ry_coef) >> 2;
b += offset;
r += offset;
}
sample[0][0][x] = g;
sample[1][0][x] = b;
sample[2][0][x] = r;
sample[3][0][x] = a;
}
for (p = 0; p < 3 + s->transparency; p++) {
int ret;
sample[p][0][-1] = sample[p][1][0 ];
sample[p][1][ w] = sample[p][1][w-1];
if (lbd && s->slice_coding_mode == 0)
ret = RENAME(encode_line)(s, w, sample[p], (p + 1) / 2, 9);
else
ret = RENAME(encode_line)(s, w, sample[p], (p + 1) / 2, bits + (s->slice_coding_mode != 1));
if (ret < 0)
return ret;
}
}
return 0;
}
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