avcodec/ffv1: template functions to allow data types different from int16_t

This is required for >= 16bit RGB support
I tried it without templates but its too much duplicated code

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

1 files changed, 186 insertions, 0 deletions

diff --git a/libavcodec/ffv1enc_template.c b/libavcodec/ffv1enc_template.c
new file mode 100644
index 0000000000..f6c44a36a0
--- /dev/null
+++ b/libavcodec/ffv1enc_template.c
@@ -0,0 +1,186 @@
+/*
+ * 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;
+}
+