h264: Split h264 slice decoding from nal decoding

libavcodec/Makefile

@@ -196,8 +196,9 @@ OBJS-$(CONFIG_H263_ENCODER)            += mpeg4videoenc.o mpeg4video.o  \
                                           h263.o ituh263enc.o flvenc.o
 OBJS-$(CONFIG_H264_DECODER)            += h264.o h264_cabac.o h264_cavlc.o \
                                           h264_direct.o h264_loopfilter.o  \
-                                          h264_mb.o h264_ps.o h264_refs.o  \
-                                          h264_sei.o cabac.o
+                                          h264_mb.o h264_picture.o h264_ps.o \
+                                          h264_refs.o h264_sei.o h264_slice.o \
+                                          cabac.o
 OBJS-$(CONFIG_HEVC_DECODER)            += hevc.o hevc_mvs.o hevc_ps.o hevc_sei.o \
                                           hevc_cabac.o hevc_refs.o hevcpred.o    \
                                           hevcdsp.o hevc_filter.o cabac.o

libavcodec/h264.h

@@ -802,6 +802,8 @@ int ff_h264_decode_mb_cabac(H264Context *h);
 
 void ff_h264_init_cabac_states(H264Context *h);
 
+void h264_init_dequant_tables(H264Context *h);
+
 void ff_h264_direct_dist_scale_factor(H264Context *const h);
 void ff_h264_direct_ref_list_init(H264Context *const h);
 void ff_h264_pred_direct_motion(H264Context *const h, int *mb_type);
@@ -1020,9 +1022,26 @@ static av_always_inline int get_dct8x8_allowed(H264Context *h)
                   0x0001000100010001ULL));
 }
 
+int ff_h264_field_end(H264Context *h, int in_setup);
+
+int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src);
+void ff_h264_unref_picture(H264Context *h, H264Picture *pic);
+
+int ff_h264_context_init(H264Context *h);
+int ff_h264_set_parameter_from_sps(H264Context *h);
+
 void ff_h264_draw_horiz_band(H264Context *h, int y, int height);
 int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc);
 int ff_pred_weight_table(H264Context *h);
 int ff_set_ref_count(H264Context *h);
 
+int ff_h264_decode_slice_header(H264Context *h, H264Context *h0);
+int ff_h264_execute_decode_slices(H264Context *h, unsigned context_count);
+int ff_h264_update_thread_context(AVCodecContext *dst,
+                                  const AVCodecContext *src);
+
+void ff_h264_flush_change(H264Context *h);
+
+void ff_h264_free_tables(H264Context *h, int free_rbsp);
+
 #endif /* AVCODEC_H264_H */

libavcodec/h264_picture.c

+/*
+ * H.26L/H.264/AVC/JVT/14496-10/... decoder
+ * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * H.264 / AVC / MPEG4 part10 codec.
+ * @author Michael Niedermayer <michaelni@gmx.at>
+ */
+
+#include "libavutil/avassert.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/timer.h"
+#include "internal.h"
+#include "cabac.h"
+#include "cabac_functions.h"
+#include "dsputil.h"
+#include "error_resilience.h"
+#include "avcodec.h"
+#include "h264.h"
+#include "h264data.h"
+#include "h264chroma.h"
+#include "h264_mvpred.h"
+#include "golomb.h"
+#include "mathops.h"
+#include "mpegutils.h"
+#include "rectangle.h"
+#include "thread.h"
+
+void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
+{
+    int off = offsetof(H264Picture, tf) + sizeof(pic->tf);
+    int i;
+
+    if (!pic->f.buf[0])
+        return;
+
+    ff_thread_release_buffer(h->avctx, &pic->tf);
+    av_buffer_unref(&pic->hwaccel_priv_buf);
+
+    av_buffer_unref(&pic->qscale_table_buf);
+    av_buffer_unref(&pic->mb_type_buf);
+    for (i = 0; i < 2; i++) {
+        av_buffer_unref(&pic->motion_val_buf[i]);
+        av_buffer_unref(&pic->ref_index_buf[i]);
+    }
+
+    memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
+}
+
+int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src)
+{
+    int ret, i;
+
+    av_assert0(!dst->f.buf[0]);
+    av_assert0(src->f.buf[0]);
+
+    src->tf.f = &src->f;
+    dst->tf.f = &dst->f;
+    ret = ff_thread_ref_frame(&dst->tf, &src->tf);
+    if (ret < 0)
+        goto fail;
+
+    dst->qscale_table_buf = av_buffer_ref(src->qscale_table_buf);
+    dst->mb_type_buf      = av_buffer_ref(src->mb_type_buf);
+    if (!dst->qscale_table_buf || !dst->mb_type_buf)
+        goto fail;
+    dst->qscale_table = src->qscale_table;
+    dst->mb_type      = src->mb_type;
+
+    for (i = 0; i < 2; i++) {
+        dst->motion_val_buf[i] = av_buffer_ref(src->motion_val_buf[i]);
+        dst->ref_index_buf[i]  = av_buffer_ref(src->ref_index_buf[i]);
+        if (!dst->motion_val_buf[i] || !dst->ref_index_buf[i])
+            goto fail;
+        dst->motion_val[i] = src->motion_val[i];
+        dst->ref_index[i]  = src->ref_index[i];
+    }
+
+    if (src->hwaccel_picture_private) {
+        dst->hwaccel_priv_buf = av_buffer_ref(src->hwaccel_priv_buf);
+        if (!dst->hwaccel_priv_buf)
+            goto fail;
+        dst->hwaccel_picture_private = dst->hwaccel_priv_buf->data;
+    }
+
+    for (i = 0; i < 2; i++)
+        dst->field_poc[i] = src->field_poc[i];
+
+    memcpy(dst->ref_poc,   src->ref_poc,   sizeof(src->ref_poc));
+    memcpy(dst->ref_count, src->ref_count, sizeof(src->ref_count));
+
+    dst->poc           = src->poc;
+    dst->frame_num     = src->frame_num;
+    dst->mmco_reset    = src->mmco_reset;
+    dst->pic_id        = src->pic_id;
+    dst->long_ref      = src->long_ref;
+    dst->mbaff         = src->mbaff;
+    dst->field_picture = src->field_picture;
+    dst->needs_realloc = src->needs_realloc;
+    dst->reference     = src->reference;
+    dst->recovered     = src->recovered;
+
+    return 0;
+fail:
+    ff_h264_unref_picture(h, dst);
+    return ret;
+}
+
+#if CONFIG_ERROR_RESILIENCE
+static void h264_set_erpic(ERPicture *dst, H264Picture *src)
+{
+    int i;
+
+    if (!src)
+        return;
+
+    dst->f = &src->f;
+    dst->tf = &src->tf;
+
+    for (i = 0; i < 2; i++) {
+        dst->motion_val[i] = src->motion_val[i];
+        dst->ref_index[i] = src->ref_index[i];
+    }
+
+    dst->mb_type = src->mb_type;
+    dst->field_picture = src->field_picture;
+}
+#endif /* CONFIG_ERROR_RESILIENCE */
+
+int ff_h264_field_end(H264Context *h, int in_setup)
+{
+    AVCodecContext *const avctx = h->avctx;
+    int err = 0;
+    h->mb_y = 0;
+
+    if (!in_setup && !h->droppable)
+        ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
+                                  h->picture_structure == PICT_BOTTOM_FIELD);
+
+    if (in_setup || !(avctx->active_thread_type & FF_THREAD_FRAME)) {
+        if (!h->droppable) {
+            err = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
+            h->prev_poc_msb = h->poc_msb;
+            h->prev_poc_lsb = h->poc_lsb;
+        }
+        h->prev_frame_num_offset = h->frame_num_offset;
+        h->prev_frame_num        = h->frame_num;
+        h->outputed_poc          = h->next_outputed_poc;
+    }
+
+    if (avctx->hwaccel) {
+        if (avctx->hwaccel->end_frame(avctx) < 0)
+            av_log(avctx, AV_LOG_ERROR,
+                   "hardware accelerator failed to decode picture\n");
+    }
+
+    /*
+     * FIXME: Error handling code does not seem to support interlaced
+     * when slices span multiple rows
+     * The ff_er_add_slice calls don't work right for bottom
+     * fields; they cause massive erroneous error concealing
+     * Error marking covers both fields (top and bottom).
+     * This causes a mismatched s->error_count
+     * and a bad error table. Further, the error count goes to
+     * INT_MAX when called for bottom field, because mb_y is
+     * past end by one (callers fault) and resync_mb_y != 0
+     * causes problems for the first MB line, too.
+     */
+    if (CONFIG_ERROR_RESILIENCE && !FIELD_PICTURE(h)) {
+        h264_set_erpic(&h->er.cur_pic, h->cur_pic_ptr);
+        h264_set_erpic(&h->er.last_pic,
+                       h->ref_count[0] ? &h->ref_list[0][0] : NULL);
+        h264_set_erpic(&h->er.next_pic,
+                       h->ref_count[1] ? &h->ref_list[1][0] : NULL);
+        ff_er_frame_end(&h->er);
+    }
+    emms_c();
+
+    h->current_slice = 0;
+
+    return err;
+}