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-rw-r--r--chromium/third_party/libvpx/source/libvpx/vp9/decoder/vp9_decoder.c330
1 files changed, 330 insertions, 0 deletions
diff --git a/chromium/third_party/libvpx/source/libvpx/vp9/decoder/vp9_decoder.c b/chromium/third_party/libvpx/source/libvpx/vp9/decoder/vp9_decoder.c
new file mode 100644
index 00000000000..9e0811fbcb2
--- /dev/null
+++ b/chromium/third_party/libvpx/source/libvpx/vp9/decoder/vp9_decoder.c
@@ -0,0 +1,330 @@
+/*
+ * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <assert.h>
+#include <limits.h>
+#include <stdio.h>
+
+#include "./vpx_scale_rtcd.h"
+
+#include "vpx_mem/vpx_mem.h"
+#include "vpx_ports/vpx_timer.h"
+#include "vpx_scale/vpx_scale.h"
+
+#include "vp9/common/vp9_alloccommon.h"
+#include "vp9/common/vp9_loopfilter.h"
+#include "vp9/common/vp9_onyxc_int.h"
+#if CONFIG_VP9_POSTPROC
+#include "vp9/common/vp9_postproc.h"
+#endif
+#include "vp9/common/vp9_quant_common.h"
+#include "vp9/common/vp9_systemdependent.h"
+
+#include "vp9/decoder/vp9_decodeframe.h"
+#include "vp9/decoder/vp9_decoder.h"
+#include "vp9/decoder/vp9_detokenize.h"
+#include "vp9/decoder/vp9_dthread.h"
+
+void vp9_initialize_dec() {
+ static int init_done = 0;
+
+ if (!init_done) {
+ vp9_init_neighbors();
+ vp9_init_quant_tables();
+ init_done = 1;
+ }
+}
+
+VP9Decoder *vp9_decoder_create() {
+ VP9Decoder *const pbi = vpx_memalign(32, sizeof(*pbi));
+ VP9_COMMON *const cm = pbi ? &pbi->common : NULL;
+
+ if (!cm)
+ return NULL;
+
+ vp9_zero(*pbi);
+
+ if (setjmp(cm->error.jmp)) {
+ cm->error.setjmp = 0;
+ vp9_decoder_remove(pbi);
+ return NULL;
+ }
+
+ cm->error.setjmp = 1;
+ vp9_initialize_dec();
+
+ vp9_rtcd();
+
+ // Initialize the references to not point to any frame buffers.
+ vpx_memset(&cm->ref_frame_map, -1, sizeof(cm->ref_frame_map));
+
+ cm->current_video_frame = 0;
+ pbi->ready_for_new_data = 1;
+ pbi->decoded_key_frame = 0;
+
+ // vp9_init_dequantizer() is first called here. Add check in
+ // frame_init_dequantizer() to avoid unnecessary calling of
+ // vp9_init_dequantizer() for every frame.
+ vp9_init_dequantizer(cm);
+
+ vp9_loop_filter_init(cm);
+
+ cm->error.setjmp = 0;
+
+ vp9_worker_init(&pbi->lf_worker);
+
+ return pbi;
+}
+
+void vp9_decoder_remove(VP9Decoder *pbi) {
+ VP9_COMMON *const cm = &pbi->common;
+ int i;
+
+ vp9_remove_common(cm);
+ vp9_worker_end(&pbi->lf_worker);
+ vpx_free(pbi->lf_worker.data1);
+ for (i = 0; i < pbi->num_tile_workers; ++i) {
+ VP9Worker *const worker = &pbi->tile_workers[i];
+ vp9_worker_end(worker);
+ vpx_free(worker->data1);
+ vpx_free(worker->data2);
+ }
+ vpx_free(pbi->tile_workers);
+
+ if (pbi->num_tile_workers) {
+ const int sb_rows =
+ mi_cols_aligned_to_sb(cm->mi_rows) >> MI_BLOCK_SIZE_LOG2;
+ vp9_loop_filter_dealloc(&pbi->lf_row_sync, sb_rows);
+ }
+
+ vpx_free(pbi);
+}
+
+static int equal_dimensions(const YV12_BUFFER_CONFIG *a,
+ const YV12_BUFFER_CONFIG *b) {
+ return a->y_height == b->y_height && a->y_width == b->y_width &&
+ a->uv_height == b->uv_height && a->uv_width == b->uv_width;
+}
+
+vpx_codec_err_t vp9_copy_reference_dec(VP9Decoder *pbi,
+ VP9_REFFRAME ref_frame_flag,
+ YV12_BUFFER_CONFIG *sd) {
+ VP9_COMMON *cm = &pbi->common;
+
+ /* TODO(jkoleszar): The decoder doesn't have any real knowledge of what the
+ * encoder is using the frame buffers for. This is just a stub to keep the
+ * vpxenc --test-decode functionality working, and will be replaced in a
+ * later commit that adds VP9-specific controls for this functionality.
+ */
+ if (ref_frame_flag == VP9_LAST_FLAG) {
+ const YV12_BUFFER_CONFIG *const cfg =
+ &cm->frame_bufs[cm->ref_frame_map[0]].buf;
+ if (!equal_dimensions(cfg, sd))
+ vpx_internal_error(&cm->error, VPX_CODEC_ERROR,
+ "Incorrect buffer dimensions");
+ else
+ vp8_yv12_copy_frame(cfg, sd);
+ } else {
+ vpx_internal_error(&cm->error, VPX_CODEC_ERROR,
+ "Invalid reference frame");
+ }
+
+ return cm->error.error_code;
+}
+
+
+vpx_codec_err_t vp9_set_reference_dec(VP9_COMMON *cm,
+ VP9_REFFRAME ref_frame_flag,
+ YV12_BUFFER_CONFIG *sd) {
+ RefBuffer *ref_buf = NULL;
+
+ // TODO(jkoleszar): The decoder doesn't have any real knowledge of what the
+ // encoder is using the frame buffers for. This is just a stub to keep the
+ // vpxenc --test-decode functionality working, and will be replaced in a
+ // later commit that adds VP9-specific controls for this functionality.
+ if (ref_frame_flag == VP9_LAST_FLAG) {
+ ref_buf = &cm->frame_refs[0];
+ } else if (ref_frame_flag == VP9_GOLD_FLAG) {
+ ref_buf = &cm->frame_refs[1];
+ } else if (ref_frame_flag == VP9_ALT_FLAG) {
+ ref_buf = &cm->frame_refs[2];
+ } else {
+ vpx_internal_error(&cm->error, VPX_CODEC_ERROR,
+ "Invalid reference frame");
+ return cm->error.error_code;
+ }
+
+ if (!equal_dimensions(ref_buf->buf, sd)) {
+ vpx_internal_error(&cm->error, VPX_CODEC_ERROR,
+ "Incorrect buffer dimensions");
+ } else {
+ int *ref_fb_ptr = &ref_buf->idx;
+
+ // Find an empty frame buffer.
+ const int free_fb = get_free_fb(cm);
+ // Decrease ref_count since it will be increased again in
+ // ref_cnt_fb() below.
+ cm->frame_bufs[free_fb].ref_count--;
+
+ // Manage the reference counters and copy image.
+ ref_cnt_fb(cm->frame_bufs, ref_fb_ptr, free_fb);
+ ref_buf->buf = &cm->frame_bufs[*ref_fb_ptr].buf;
+ vp8_yv12_copy_frame(sd, ref_buf->buf);
+ }
+
+ return cm->error.error_code;
+}
+
+
+int vp9_get_reference_dec(VP9Decoder *pbi, int index, YV12_BUFFER_CONFIG **fb) {
+ VP9_COMMON *cm = &pbi->common;
+
+ if (index < 0 || index >= REF_FRAMES)
+ return -1;
+
+ *fb = &cm->frame_bufs[cm->ref_frame_map[index]].buf;
+ return 0;
+}
+
+/* If any buffer updating is signaled it should be done here. */
+static void swap_frame_buffers(VP9Decoder *pbi) {
+ int ref_index = 0, mask;
+ VP9_COMMON *const cm = &pbi->common;
+
+ for (mask = pbi->refresh_frame_flags; mask; mask >>= 1) {
+ if (mask & 1) {
+ const int old_idx = cm->ref_frame_map[ref_index];
+ ref_cnt_fb(cm->frame_bufs, &cm->ref_frame_map[ref_index],
+ cm->new_fb_idx);
+ if (old_idx >= 0 && cm->frame_bufs[old_idx].ref_count == 0)
+ cm->release_fb_cb(cm->cb_priv,
+ &cm->frame_bufs[old_idx].raw_frame_buffer);
+ }
+ ++ref_index;
+ }
+
+ cm->frame_to_show = get_frame_new_buffer(cm);
+ cm->frame_bufs[cm->new_fb_idx].ref_count--;
+
+ // Invalidate these references until the next frame starts.
+ for (ref_index = 0; ref_index < 3; ref_index++)
+ cm->frame_refs[ref_index].idx = INT_MAX;
+}
+
+int vp9_receive_compressed_data(VP9Decoder *pbi,
+ size_t size, const uint8_t **psource,
+ int64_t time_stamp) {
+ VP9_COMMON *const cm = &pbi->common;
+ const uint8_t *source = *psource;
+ int retcode = 0;
+
+ cm->error.error_code = VPX_CODEC_OK;
+
+ if (size == 0) {
+ // This is used to signal that we are missing frames.
+ // We do not know if the missing frame(s) was supposed to update
+ // any of the reference buffers, but we act conservative and
+ // mark only the last buffer as corrupted.
+ //
+ // TODO(jkoleszar): Error concealment is undefined and non-normative
+ // at this point, but if it becomes so, [0] may not always be the correct
+ // thing to do here.
+ if (cm->frame_refs[0].idx != INT_MAX)
+ cm->frame_refs[0].buf->corrupted = 1;
+ }
+
+ // Check if the previous frame was a frame without any references to it.
+ if (cm->new_fb_idx >= 0 && cm->frame_bufs[cm->new_fb_idx].ref_count == 0)
+ cm->release_fb_cb(cm->cb_priv,
+ &cm->frame_bufs[cm->new_fb_idx].raw_frame_buffer);
+ cm->new_fb_idx = get_free_fb(cm);
+
+ if (setjmp(cm->error.jmp)) {
+ cm->error.setjmp = 0;
+
+ // We do not know if the missing frame(s) was supposed to update
+ // any of the reference buffers, but we act conservative and
+ // mark only the last buffer as corrupted.
+ //
+ // TODO(jkoleszar): Error concealment is undefined and non-normative
+ // at this point, but if it becomes so, [0] may not always be the correct
+ // thing to do here.
+ if (cm->frame_refs[0].idx != INT_MAX)
+ cm->frame_refs[0].buf->corrupted = 1;
+
+ if (cm->frame_bufs[cm->new_fb_idx].ref_count > 0)
+ cm->frame_bufs[cm->new_fb_idx].ref_count--;
+
+ return -1;
+ }
+
+ cm->error.setjmp = 1;
+
+ retcode = vp9_decode_frame(pbi, source, source + size, psource);
+
+ if (retcode < 0) {
+ cm->error.error_code = VPX_CODEC_ERROR;
+ cm->error.setjmp = 0;
+ if (cm->frame_bufs[cm->new_fb_idx].ref_count > 0)
+ cm->frame_bufs[cm->new_fb_idx].ref_count--;
+ return retcode;
+ }
+
+ swap_frame_buffers(pbi);
+
+ vp9_clear_system_state();
+
+ cm->last_width = cm->width;
+ cm->last_height = cm->height;
+
+ if (!cm->show_existing_frame)
+ cm->last_show_frame = cm->show_frame;
+ if (cm->show_frame) {
+ if (!cm->show_existing_frame)
+ vp9_swap_mi_and_prev_mi(cm);
+
+ cm->current_video_frame++;
+ }
+
+ pbi->ready_for_new_data = 0;
+ pbi->last_time_stamp = time_stamp;
+
+ cm->error.setjmp = 0;
+ return retcode;
+}
+
+int vp9_get_raw_frame(VP9Decoder *pbi, YV12_BUFFER_CONFIG *sd,
+ int64_t *time_stamp, int64_t *time_end_stamp,
+ vp9_ppflags_t *flags) {
+ int ret = -1;
+#if !CONFIG_VP9_POSTPROC
+ (void)*flags;
+#endif
+
+ if (pbi->ready_for_new_data == 1)
+ return ret;
+
+ /* no raw frame to show!!! */
+ if (pbi->common.show_frame == 0)
+ return ret;
+
+ pbi->ready_for_new_data = 1;
+ *time_stamp = pbi->last_time_stamp;
+ *time_end_stamp = 0;
+
+#if CONFIG_VP9_POSTPROC
+ ret = vp9_post_proc_frame(&pbi->common, sd, flags);
+#else
+ *sd = *pbi->common.frame_to_show;
+ ret = 0;
+#endif /*!CONFIG_POSTPROC*/
+ vp9_clear_system_state();
+ return ret;
+}
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