path: root/libavcodec/ffv1enc_template.c (plain)
blob: b7eea0dd700dcff3973346a71d049a8282fdd028

1	/*
2	* FFV1 encoder template
3	*
4	* Copyright (c) 2003-2016 Michael Niedermayer <michaelni@gmx.at>
5	*
6	* This file is part of FFmpeg.
7	*
8	* FFmpeg is free software; you can redistribute it and/or
9	* modify it under the terms of the GNU Lesser General Public
10	* License as published by the Free Software Foundation; either
11	* version 2.1 of the License, or (at your option) any later version.
12	*
13	* FFmpeg is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16	* Lesser General Public License for more details.
17	*
18	* You should have received a copy of the GNU Lesser General Public
19	* License along with FFmpeg; if not, write to the Free Software
20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21	*/
22
23	static av_always_inline int RENAME(encode_line)(FFV1Context *s, int w,
24	TYPE *sample[3],
25	int plane_index, int bits)
26	{
27	PlaneContext *const p = &s->plane[plane_index];
28	RangeCoder *const c = &s->c;
29	int x;
30	int run_index = s->run_index;
31	int run_count = 0;
32	int run_mode = 0;
33
34	if (s->ac != AC_GOLOMB_RICE) {
35	if (c->bytestream_end - c->bytestream < w * 35) {
36	av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
37	return AVERROR_INVALIDDATA;
38	}
39	} else {
40	if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) < w * 4) {
41	av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
42	return AVERROR_INVALIDDATA;
43	}
44	}
45
46	if (s->slice_coding_mode == 1) {
47	for (x = 0; x < w; x++) {
48	int i;
49	int v = sample[0][x];
50	for (i = bits-1; i>=0; i--) {
51	uint8_t state = 128;
52	put_rac(c, &state, (v>>i) & 1);
53	}
54	}
55	return 0;
56	}
57
58	for (x = 0; x < w; x++) {
59	int diff, context;
60
61	context = RENAME(get_context)(p, sample[0] + x, sample[1] + x, sample[2] + x);
62	diff = sample[0][x] - RENAME(predict)(sample[0] + x, sample[1] + x);
63
64	if (context < 0) {
65	context = -context;
66	diff = -diff;
67	}
68
69	diff = fold(diff, bits);
70
71	if (s->ac != AC_GOLOMB_RICE) {
72	if (s->flags & AV_CODEC_FLAG_PASS1) {
73	put_symbol_inline(c, p->state[context], diff, 1, s->rc_stat,
74	s->rc_stat2[p->quant_table_index][context]);
75	} else {
76	put_symbol_inline(c, p->state[context], diff, 1, NULL, NULL);
77	}
78	} else {
79	if (context == 0)
80	run_mode = 1;
81
82	if (run_mode) {
83	if (diff) {
84	while (run_count >= 1 << ff_log2_run[run_index]) {
85	run_count -= 1 << ff_log2_run[run_index];
86	run_index++;
87	put_bits(&s->pb, 1, 1);
88	}
89
90	put_bits(&s->pb, 1 + ff_log2_run[run_index], run_count);
91	if (run_index)
92	run_index--;
93	run_count = 0;
94	run_mode = 0;
95	if (diff > 0)
96	diff--;
97	} else {
98	run_count++;
99	}
100	}
101
102	ff_dlog(s->avctx, "count:%d index:%d, mode:%d, x:%d pos:%d\n",
103	run_count, run_index, run_mode, x,
104	(int)put_bits_count(&s->pb));
105
106	if (run_mode == 0)
107	put_vlc_symbol(&s->pb, &p->vlc_state[context], diff, bits);
108	}
109	}
110	if (run_mode) {
111	while (run_count >= 1 << ff_log2_run[run_index]) {
112	run_count -= 1 << ff_log2_run[run_index];
113	run_index++;
114	put_bits(&s->pb, 1, 1);
115	}
116
117	if (run_count)
118	put_bits(&s->pb, 1, 1);
119	}
120	s->run_index = run_index;
121
122	return 0;
123	}
124
125	static int RENAME(encode_rgb_frame)(FFV1Context *s, const uint8_t *src[3],
126	int w, int h, const int stride[3])
127	{
128	int x, y, p, i;
129	const int ring_size = s->context_model ? 3 : 2;
130	TYPE *sample[4][3];
131	int lbd = s->bits_per_raw_sample <= 8;
132	int packed = !src[1];
133	int bits = s->bits_per_raw_sample > 0 ? s->bits_per_raw_sample : 8;
134	int offset = 1 << bits;
135
136	s->run_index = 0;
137
138	memset(RENAME(s->sample_buffer), 0, ring_size * MAX_PLANES *
139	(w + 6) * sizeof(*RENAME(s->sample_buffer)));
140
141	for (y = 0; y < h; y++) {
142	for (i = 0; i < ring_size; i++)
143	for (p = 0; p < MAX_PLANES; p++)
144	sample[p][i]= RENAME(s->sample_buffer) + p*ring_size*(w+6) + ((h+i-y)%ring_size)*(w+6) + 3;
145
146	for (x = 0; x < w; x++) {
147	int b, g, r, av_uninit(a);
148	if (lbd) {
149	unsigned v = *((const uint32_t*)(src[0] + x*4 + stride[0]*y));
150	b = v & 0xFF;
151	g = (v >> 8) & 0xFF;
152	r = (v >> 16) & 0xFF;
153	a = v >> 24;
154	} else if (packed) {
155	const uint16_t *p = ((const uint16_t*)(src[0] + x*6 + stride[0]*y));
156	r = p[0];
157	g = p[1];
158	b = p[2];
159	} else if (sizeof(TYPE) == 4) {
160	g = *((const uint16_t *)(src[0] + x*2 + stride[0]*y));
161	b = *((const uint16_t *)(src[1] + x*2 + stride[1]*y));
162	r = *((const uint16_t *)(src[2] + x*2 + stride[2]*y));
163	} else {
164	b = *((const uint16_t *)(src[0] + x*2 + stride[0]*y));
165	g = *((const uint16_t *)(src[1] + x*2 + stride[1]*y));
166	r = *((const uint16_t *)(src[2] + x*2 + stride[2]*y));
167	}
168
169	if (s->slice_coding_mode != 1) {
170	b -= g;
171	r -= g;
172	g += (b * s->slice_rct_by_coef + r * s->slice_rct_ry_coef) >> 2;
173	b += offset;
174	r += offset;
175	}
176
177	sample[0][0][x] = g;
178	sample[1][0][x] = b;
179	sample[2][0][x] = r;
180	sample[3][0][x] = a;
181	}
182	for (p = 0; p < 3 + s->transparency; p++) {
183	int ret;
184	sample[p][0][-1] = sample[p][1][0 ];
185	sample[p][1][ w] = sample[p][1][w-1];
186	if (lbd && s->slice_coding_mode == 0)
187	ret = RENAME(encode_line)(s, w, sample[p], (p + 1) / 2, 9);
188	else
189	ret = RENAME(encode_line)(s, w, sample[p], (p + 1) / 2, bits + (s->slice_coding_mode != 1));
190	if (ret < 0)
191	return ret;
192	}
193	}
194	return 0;
195	}
196
197