1 files changed, 151 insertions, 0 deletions
diff --git a/third_party/dav1d/tools/output/y4m2.c b/third_party/dav1d/tools/output/y4m2.c
new file mode 100644
index 0000000000..8766f64868
--- /dev/null
+++ b/third_party/dav1d/tools/output/y4m2.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright © 2018, VideoLAN and dav1d authors
+ * Copyright © 2018, Two Orioles, LLC
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#include <errno.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+
+#include "output/muxer.h"
+
+typedef struct MuxerPriv {
+    FILE *f;
+    int first;
+    unsigned fps[2];
+} Y4m2OutputContext;
+
+static int y4m2_open(Y4m2OutputContext *const c, const char *const file,
+                     const Dav1dPictureParameters *p, const unsigned fps[2])
+{
+    if (!strcmp(file, "-")) {
+        c->f = stdout;
+    } else if (!(c->f = fopen(file, "wb"))) {
+        fprintf(stderr, "Failed to open %s: %s\n", file, strerror(errno));
+        return -1;
+    }
+
+    c->first = 1;
+    c->fps[0] = fps[0];
+    c->fps[1] = fps[1];
+
+    return 0;
+}
+
+static int write_header(Y4m2OutputContext *const c, const Dav1dPicture *const p) {
+    static const char *const ss_names[][3] = {
+        [DAV1D_PIXEL_LAYOUT_I400] = { "mono", "mono10", "mono12" },
+        [DAV1D_PIXEL_LAYOUT_I420] = { NULL,   "420p10", "420p12" },
+        [DAV1D_PIXEL_LAYOUT_I422] = { "422",  "422p10", "422p12" },
+        [DAV1D_PIXEL_LAYOUT_I444] = { "444",  "444p10", "444p12" }
+    };
+
+    static const char *const chr_names_8bpc_i420[] = {
+        [DAV1D_CHR_UNKNOWN] = "420jpeg",
+        [DAV1D_CHR_VERTICAL] = "420mpeg2",
+        [DAV1D_CHR_COLOCATED] = "420"
+    };
+
+    const char *const ss_name =
+        p->p.layout == DAV1D_PIXEL_LAYOUT_I420 && p->p.bpc == 8 ?
+        chr_names_8bpc_i420[p->seq_hdr->chr > 2 ? DAV1D_CHR_UNKNOWN : p->seq_hdr->chr] :
+        ss_names[p->p.layout][p->seq_hdr->hbd];
+
+    const unsigned fw = p->p.w;
+    const unsigned fh = p->p.h;
+    uint64_t aw = (uint64_t)fh * p->frame_hdr->render_width;
+    uint64_t ah = (uint64_t)fw * p->frame_hdr->render_height;
+    uint64_t gcd = ah;
+    for (uint64_t a = aw, b; (b = a % gcd); a = gcd, gcd = b);
+    aw /= gcd;
+    ah /= gcd;
+
+    fprintf(c->f, "YUV4MPEG2 W%u H%u F%u:%u Ip A%"PRIu64":%"PRIu64" C%s\n",
+            fw, fh, c->fps[0], c->fps[1], aw, ah, ss_name);
+
+    return 0;
+}
+
+static int y4m2_write(Y4m2OutputContext *const c, Dav1dPicture *const p) {
+    if (c->first) {
+        c->first = 0;
+        const int res = write_header(c, p);
+        if (res < 0) return res;
+    }
+    fprintf(c->f, "FRAME\n");
+
+    uint8_t *ptr;
+    const int hbd = p->p.bpc > 8;
+
+    ptr = p->data[0];
+    for (int y = 0; y < p->p.h; y++) {
+        if (fwrite(ptr, p->p.w << hbd, 1, c->f) != 1)
+            goto error;
+        ptr += p->stride[0];
+    }
+
+    if (p->p.layout != DAV1D_PIXEL_LAYOUT_I400) {
+        // u/v
+        const int ss_ver = p->p.layout == DAV1D_PIXEL_LAYOUT_I420;
+        const int ss_hor = p->p.layout != DAV1D_PIXEL_LAYOUT_I444;
+        const int cw = (p->p.w + ss_hor) >> ss_hor;
+        const int ch = (p->p.h + ss_ver) >> ss_ver;
+        for (int pl = 1; pl <= 2; pl++) {
+            ptr = p->data[pl];
+            for (int y = 0; y < ch; y++) {
+                if (fwrite(ptr, cw << hbd, 1, c->f) != 1)
+                    goto error;
+                ptr += p->stride[1];
+            }
+        }
+    }
+
+    dav1d_picture_unref(p);
+    return 0;
+
+error:
+    dav1d_picture_unref(p);
+    fprintf(stderr, "Failed to write frame data: %s\n", strerror(errno));
+    return -1;
+}
+
+static void y4m2_close(Y4m2OutputContext *const c) {
+    if (c->f != stdout)
+        fclose(c->f);
+}
+
+const Muxer y4m2_muxer = {
+    .priv_data_size = sizeof(Y4m2OutputContext),
+    .name = "yuv4mpeg2",
+    .extension = "y4m",
+    .write_header = y4m2_open,
+    .write_picture = y4m2_write,
+    .write_trailer = y4m2_close,
+};