1 files changed, 222 insertions, 0 deletions
diff --git a/video/out/hwdec/hwdec_ios_gl.m b/video/out/hwdec/hwdec_ios_gl.m
new file mode 100644
index 0000000..633cc3d
--- /dev/null
+++ b/video/out/hwdec/hwdec_ios_gl.m
@@ -0,0 +1,222 @@
+/*
+ * Copyright (c) 2013 Stefano Pigozzi <stefano.pigozzi@gmail.com>
+ *               2017 Aman Gupta <ffmpeg@tmm1.net>
+ *
+ * This file is part of mpv.
+ *
+ * mpv 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.
+ *
+ * mpv 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 mpv.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <assert.h>
+
+#include <CoreVideo/CoreVideo.h>
+#include <OpenGLES/EAGL.h>
+
+#include <libavutil/hwcontext.h>
+
+#include "video/out/gpu/hwdec.h"
+#include "video/mp_image_pool.h"
+#include "video/out/opengl/ra_gl.h"
+#include "hwdec_vt.h"
+
+static bool check_hwdec(const struct ra_hwdec *hw)
+{
+    if (!ra_is_gl(hw->ra_ctx->ra))
+        return false;
+
+    GL *gl = ra_gl_get(hw->ra_ctx->ra);
+    if (gl->es < 200) {
+        MP_ERR(hw, "need OpenGLES 2.0 for CVOpenGLESTextureCacheCreateTextureFromImage()\n");
+        return false;
+    }
+
+    if ([EAGLContext currentContext] == nil) {
+        MP_ERR(hw, "need a current EAGLContext set\n");
+        return false;
+    }
+
+    return true;
+}
+
+// In GLES3 mode, CVOpenGLESTextureCacheCreateTextureFromImage()
+// will return error -6683 unless invoked with GL_LUMINANCE and
+// GL_LUMINANCE_ALPHA (http://stackoverflow.com/q/36213994/332798)
+// If a format trues to use GL_RED/GL_RG instead, try to find a format
+// that uses GL_LUMINANCE[_ALPHA] instead.
+static const struct ra_format *find_la_variant(struct ra *ra,
+                                               const struct ra_format *fmt)
+{
+    GLint internal_format;
+    GLenum format;
+    GLenum type;
+    ra_gl_get_format(fmt, &internal_format, &format, &type);
+
+    if (format == GL_RED) {
+        format = internal_format = GL_LUMINANCE;
+    } else if (format == GL_RG) {
+        format = internal_format = GL_LUMINANCE_ALPHA;
+    } else {
+        return fmt;
+    }
+
+    for (int n = 0; n < ra->num_formats; n++) {
+        const struct ra_format *fmt2 = ra->formats[n];
+        GLint internal_format2;
+        GLenum format2;
+        GLenum type2;
+        ra_gl_get_format(fmt2, &internal_format2, &format2, &type2);
+        if (internal_format2 == internal_format &&
+            format2 == format && type2 == type)
+            return fmt2;
+    }
+
+    return NULL;
+}
+
+static int mapper_init(struct ra_hwdec_mapper *mapper)
+{
+    struct priv *p = mapper->priv;
+
+    for (int n = 0; n < p->desc.num_planes; n++) {
+        p->desc.planes[n] = find_la_variant(mapper->ra, p->desc.planes[n]);
+        if (!p->desc.planes[n] || p->desc.planes[n]->ctype != RA_CTYPE_UNORM) {
+            MP_ERR(mapper, "Format unsupported.\n");
+            return -1;
+        }
+    }
+
+    CVReturn err = CVOpenGLESTextureCacheCreate(
+        kCFAllocatorDefault,
+        NULL,
+        [EAGLContext currentContext],
+        NULL,
+        &p->gl_texture_cache);
+
+    if (err != noErr) {
+        MP_ERR(mapper, "Failure in CVOpenGLESTextureCacheCreate: %d\n", err);
+        return -1;
+    }
+
+    return 0;
+}
+
+static void mapper_unmap(struct ra_hwdec_mapper *mapper)
+{
+    struct priv *p = mapper->priv;
+
+    for (int i = 0; i < p->desc.num_planes; i++) {
+        ra_tex_free(mapper->ra, &mapper->tex[i]);
+        if (p->gl_planes[i]) {
+            CFRelease(p->gl_planes[i]);
+            p->gl_planes[i] = NULL;
+        }
+    }
+
+    CVOpenGLESTextureCacheFlush(p->gl_texture_cache, 0);
+}
+
+static int mapper_map(struct ra_hwdec_mapper *mapper)
+{
+    struct priv *p = mapper->priv;
+    GL *gl = ra_gl_get(mapper->ra);
+
+    CVPixelBufferRelease(p->pbuf);
+    p->pbuf = (CVPixelBufferRef)mapper->src->planes[3];
+    CVPixelBufferRetain(p->pbuf);
+
+    const bool planar = CVPixelBufferIsPlanar(p->pbuf);
+    const int planes  = CVPixelBufferGetPlaneCount(p->pbuf);
+    assert((planar && planes == p->desc.num_planes) || p->desc.num_planes == 1);
+
+    for (int i = 0; i < p->desc.num_planes; i++) {
+        const struct ra_format *fmt = p->desc.planes[i];
+
+        GLint internal_format;
+        GLenum format;
+        GLenum type;
+        ra_gl_get_format(fmt, &internal_format, &format, &type);
+
+        CVReturn err = CVOpenGLESTextureCacheCreateTextureFromImage(
+            kCFAllocatorDefault,
+            p->gl_texture_cache,
+            p->pbuf,
+            NULL,
+            GL_TEXTURE_2D,
+            internal_format,
+            CVPixelBufferGetWidthOfPlane(p->pbuf, i),
+            CVPixelBufferGetHeightOfPlane(p->pbuf, i),
+            format,
+            type,
+            i,
+            &p->gl_planes[i]);
+
+        if (err != noErr) {
+            MP_ERR(mapper, "error creating texture for plane %d: %d\n", i, err);
+            return -1;
+        }
+
+        gl->BindTexture(GL_TEXTURE_2D, CVOpenGLESTextureGetName(p->gl_planes[i]));
+        gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+        gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+        gl->BindTexture(GL_TEXTURE_2D, 0);
+
+        struct ra_tex_params params = {
+            .dimensions = 2,
+            .w = CVPixelBufferGetWidthOfPlane(p->pbuf, i),
+            .h = CVPixelBufferGetHeightOfPlane(p->pbuf, i),
+            .d = 1,
+            .format = fmt,
+            .render_src = true,
+            .src_linear = true,
+        };
+
+        mapper->tex[i] = ra_create_wrapped_tex(
+            mapper->ra,
+            &params,
+            CVOpenGLESTextureGetName(p->gl_planes[i])
+        );
+        if (!mapper->tex[i])
+            return -1;
+    }
+
+    return 0;
+}
+
+static void mapper_uninit(struct ra_hwdec_mapper *mapper)
+{
+    struct priv *p = mapper->priv;
+
+    CVPixelBufferRelease(p->pbuf);
+    if (p->gl_texture_cache) {
+        CFRelease(p->gl_texture_cache);
+        p->gl_texture_cache = NULL;
+    }
+}
+
+bool vt_gl_init(const struct ra_hwdec *hw)
+{
+    struct priv_owner *p = hw->priv;
+
+    if (!check_hwdec(hw))
+        return false;
+
+    p->interop_init   = mapper_init;
+    p->interop_uninit = mapper_uninit;
+    p->interop_map    = mapper_map;
+    p->interop_unmap  = mapper_unmap;
+
+    return true;
+}