— Update ffmpeg

— Refactor ffmpeg usage to modern APIs
— Update media encoding and decoding

submodules/ffmpeg/Sources/FFMpeg/ffmpeg-7.1/libavcodec/ffv1.c

@@ -0,0 +1,232 @@
+/*
+ * FFV1 codec for libavcodec
+ *
+ * Copyright (c) 2003-2013 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
+ */
+
+/**
+ * @file
+ * FF Video Codec 1 (a lossless codec)
+ */
+
+#include "libavutil/attributes.h"
+#include "libavutil/avassert.h"
+#include "libavutil/mem.h"
+
+#include "avcodec.h"
+#include "ffv1.h"
+#include "refstruct.h"
+
+av_cold int ff_ffv1_common_init(AVCodecContext *avctx)
+{
+    FFV1Context *s = avctx->priv_data;
+
+    if (!avctx->width || !avctx->height)
+        return AVERROR_INVALIDDATA;
+
+    s->avctx = avctx;
+    s->flags = avctx->flags;
+
+    s->width  = avctx->width;
+    s->height = avctx->height;
+
+    // defaults
+    s->num_h_slices = 1;
+    s->num_v_slices = 1;
+
+    return 0;
+}
+
+static void planes_free(FFRefStructOpaque opaque, void *obj)
+{
+    PlaneContext *planes = obj;
+
+    for (int i = 0; i < MAX_PLANES; i++) {
+        PlaneContext *p = &planes[i];
+
+        av_freep(&p->state);
+        av_freep(&p->vlc_state);
+    }
+}
+
+PlaneContext* ff_ffv1_planes_alloc(void)
+{
+    return ff_refstruct_alloc_ext(sizeof(PlaneContext) * MAX_PLANES,
+                                  0, NULL, planes_free);
+}
+
+av_cold int ff_ffv1_init_slice_state(const FFV1Context *f,
+                                     FFV1SliceContext *sc)
+{
+    int j, i;
+
+    for (j = 0; j < f->plane_count; j++) {
+        PlaneContext *const p = &sc->plane[j];
+
+        if (f->ac != AC_GOLOMB_RICE) {
+            if (!p->state)
+                p->state = av_malloc_array(p->context_count, CONTEXT_SIZE *
+                                     sizeof(uint8_t));
+            if (!p->state)
+                return AVERROR(ENOMEM);
+        } else {
+            if (!p->vlc_state) {
+                p->vlc_state = av_calloc(p->context_count, sizeof(*p->vlc_state));
+                if (!p->vlc_state)
+                    return AVERROR(ENOMEM);
+                for (i = 0; i < p->context_count; i++) {
+                    p->vlc_state[i].error_sum = 4;
+                    p->vlc_state[i].count     = 1;
+                }
+            }
+        }
+    }
+
+    if (f->ac == AC_RANGE_CUSTOM_TAB) {
+        //FIXME only redo if state_transition changed
+        for (j = 1; j < 256; j++) {
+            sc->c. one_state[      j] = f->state_transition[j];
+            sc->c.zero_state[256 - j] = 256 - sc->c.one_state[j];
+        }
+    }
+
+    return 0;
+}
+
+av_cold int ff_ffv1_init_slices_state(FFV1Context *f)
+{
+    int i, ret;
+    for (i = 0; i < f->max_slice_count; i++) {
+        if ((ret = ff_ffv1_init_slice_state(f, &f->slices[i])) < 0)
+            return AVERROR(ENOMEM);
+    }
+    return 0;
+}
+
+av_cold int ff_ffv1_init_slice_contexts(FFV1Context *f)
+{
+    int max_slice_count = f->num_h_slices * f->num_v_slices;
+
+    av_assert0(max_slice_count > 0);
+
+    f->slices = av_calloc(max_slice_count, sizeof(*f->slices));
+    if (!f->slices)
+        return AVERROR(ENOMEM);
+
+    f->max_slice_count = max_slice_count;
+
+    for (int i = 0; i < max_slice_count; i++) {
+        FFV1SliceContext *sc = &f->slices[i];
+        int sx          = i % f->num_h_slices;
+        int sy          = i / f->num_h_slices;
+        int sxs         = f->avctx->width  *  sx      / f->num_h_slices;
+        int sxe         = f->avctx->width  * (sx + 1) / f->num_h_slices;
+        int sys         = f->avctx->height *  sy      / f->num_v_slices;
+        int sye         = f->avctx->height * (sy + 1) / f->num_v_slices;
+
+        sc->slice_width  = sxe - sxs;
+        sc->slice_height = sye - sys;
+        sc->slice_x      = sxs;
+        sc->slice_y      = sys;
+
+        sc->sample_buffer = av_malloc_array((f->width + 6), 3 * MAX_PLANES *
+                                            sizeof(*sc->sample_buffer));
+        sc->sample_buffer32 = av_malloc_array((f->width + 6), 3 * MAX_PLANES *
+                                              sizeof(*sc->sample_buffer32));
+        if (!sc->sample_buffer || !sc->sample_buffer32)
+            return AVERROR(ENOMEM);
+
+        sc->plane = ff_ffv1_planes_alloc();
+        if (!sc->plane)
+            return AVERROR(ENOMEM);
+    }
+
+    return 0;
+}
+
+int ff_ffv1_allocate_initial_states(FFV1Context *f)
+{
+    int i;
+
+    for (i = 0; i < f->quant_table_count; i++) {
+        f->initial_states[i] = av_malloc_array(f->context_count[i],
+                                         sizeof(*f->initial_states[i]));
+        if (!f->initial_states[i])
+            return AVERROR(ENOMEM);
+        memset(f->initial_states[i], 128,
+               f->context_count[i] * sizeof(*f->initial_states[i]));
+    }
+    return 0;
+}
+
+void ff_ffv1_clear_slice_state(const FFV1Context *f, FFV1SliceContext *sc)
+{
+    int i, j;
+
+    for (i = 0; i < f->plane_count; i++) {
+        PlaneContext *p = &sc->plane[i];
+
+        if (f->ac != AC_GOLOMB_RICE) {
+            if (f->initial_states[p->quant_table_index]) {
+                memcpy(p->state, f->initial_states[p->quant_table_index],
+                       CONTEXT_SIZE * p->context_count);
+            } else
+                memset(p->state, 128, CONTEXT_SIZE * p->context_count);
+        } else {
+            for (j = 0; j < p->context_count; j++) {
+                p->vlc_state[j].drift     = 0;
+                p->vlc_state[j].error_sum = 4;    //FFMAX((RANGE + 32)/64, 2);
+                p->vlc_state[j].bias      = 0;
+                p->vlc_state[j].count     = 1;
+            }
+        }
+    }
+}
+
+
+av_cold int ff_ffv1_close(AVCodecContext *avctx)
+{
+    FFV1Context *s = avctx->priv_data;
+    int i, j;
+
+    for (j = 0; j < s->max_slice_count; j++) {
+        FFV1SliceContext *sc = &s->slices[j];
+
+        av_freep(&sc->sample_buffer);
+        av_freep(&sc->sample_buffer32);
+
+        ff_refstruct_unref(&sc->plane);
+    }
+
+    ff_refstruct_unref(&s->slice_damaged);
+
+    av_freep(&avctx->stats_out);
+    for (j = 0; j < s->quant_table_count; j++) {
+        av_freep(&s->initial_states[j]);
+        for (i = 0; i < s->max_slice_count; i++) {
+            FFV1SliceContext *sc = &s->slices[i];
+            av_freep(&sc->rc_stat2[j]);
+        }
+        av_freep(&s->rc_stat2[j]);
+    }
+
+    av_freep(&s->slices);
+
+    return 0;
+}