summaryrefslogtreecommitdiff
path: root/libavcodec/ffv1enc_template.c
diff options
context:
space:
mode:
Diffstat (limited to 'libavcodec/ffv1enc_template.c')
-rw-r--r--libavcodec/ffv1enc_template.c202
1 files changed, 202 insertions, 0 deletions
diff --git a/libavcodec/ffv1enc_template.c b/libavcodec/ffv1enc_template.c
new file mode 100644
index 0000000000..bc0add5ed7
--- /dev/null
+++ b/libavcodec/ffv1enc_template.c
@@ -0,0 +1,202 @@
+/*
+ * 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[4],
+ int w, int h, const int stride[4])
+{
+ 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 packed = !src[1];
+ int bits = s->bits_per_raw_sample > 0 ? s->bits_per_raw_sample : 8;
+ int offset = 1 << bits;
+ int transparency = s->transparency;
+ int packed_size = (3 + transparency)*2;
+
+ 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 if (packed) {
+ const uint16_t *p = ((const uint16_t*)(src[0] + x*packed_size + stride[0]*y));
+ r = p[0];
+ g = p[1];
+ b = p[2];
+ if (transparency)
+ a = p[3];
+ } else if (sizeof(TYPE) == 4 || transparency) {
+ g = *((const uint16_t *)(src[0] + x*2 + stride[0]*y));
+ b = *((const uint16_t *)(src[1] + x*2 + stride[1]*y));
+ r = *((const uint16_t *)(src[2] + x*2 + stride[2]*y));
+ if (transparency)
+ a = *((const uint16_t *)(src[3] + x*2 + stride[3]*y));
+ } 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 + 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;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-08 00:29:07 +0000