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Diffstat (limited to 'ffmpeg1/libavcodec/escape130.c')
-rw-r--r--ffmpeg1/libavcodec/escape130.c319
1 files changed, 0 insertions, 319 deletions
diff --git a/ffmpeg1/libavcodec/escape130.c b/ffmpeg1/libavcodec/escape130.c
deleted file mode 100644
index d24af79..0000000
--- a/ffmpeg1/libavcodec/escape130.c
+++ /dev/null
@@ -1,319 +0,0 @@
-/*
- * Escape 130 Video Decoder
- * Copyright (C) 2008 Eli Friedman (eli.friedman <at> gmail.com)
- *
- * 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
- */
-
-#include "avcodec.h"
-
-#define BITSTREAM_READER_LE
-#include "get_bits.h"
-#include "internal.h"
-
-
-typedef struct Escape130Context {
- AVFrame frame;
- uint8_t *bases;
-} Escape130Context;
-
-/**
- * Initialize the decoder
- * @param avctx decoder context
- * @return 0 success, negative on error
- */
-static av_cold int escape130_decode_init(AVCodecContext *avctx)
-{
- Escape130Context *s = avctx->priv_data;
- avctx->pix_fmt = AV_PIX_FMT_YUV420P;
- avcodec_get_frame_defaults(&s->frame);
-
- if((avctx->width&1) || (avctx->height&1)){
- av_log(avctx, AV_LOG_ERROR, "Dimensions are not a multiple of the block size\n");
- return AVERROR(EINVAL);
- }
-
- s->bases= av_malloc(avctx->width * avctx->height /4);
-
- return 0;
-}
-
-static av_cold int escape130_decode_close(AVCodecContext *avctx)
-{
- Escape130Context *s = avctx->priv_data;
-
- av_frame_unref(&s->frame);
-
- av_freep(&s->bases);
-
- return 0;
-}
-
-static unsigned decode_skip_count(GetBitContext* gb) {
- unsigned value;
- // This function reads a maximum of 27 bits,
- // which is within the padding space
- if (get_bits_left(gb) < 1+3)
- return -1;
-
- value = get_bits1(gb);
- if (value)
- return 0;
-
- value = get_bits(gb, 3);
- if (value)
- return value;
-
- value = get_bits(gb, 8);
- if (value)
- return value + 7;
-
- value = get_bits(gb, 15);
- if (value)
- return value + 262;
-
- return -1;
-}
-
-/**
- * Decode a single frame
- * @param avctx decoder context
- * @param data decoded frame
- * @param got_frame have decoded frame
- * @param buf input buffer
- * @param buf_size input buffer size
- * @return 0 success, -1 on error
- */
-static int escape130_decode_frame(AVCodecContext *avctx,
- void *data, int *got_frame,
- AVPacket *avpkt)
-{
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- Escape130Context *s = avctx->priv_data;
-
- GetBitContext gb;
- unsigned i;
- int ret;
-
- uint8_t *old_y, *old_cb, *old_cr,
- *new_y, *new_cb, *new_cr;
- unsigned old_y_stride, old_cb_stride, old_cr_stride,
- new_y_stride, new_cb_stride, new_cr_stride;
- unsigned total_blocks = avctx->width * avctx->height / 4,
- block_index, row_index = 0;
- unsigned y[4] = {0}, cb = 16, cr = 16;
- unsigned skip = -1;
- unsigned y_base = 0;
- uint8_t *yb= s->bases;
-
- AVFrame *frame = data;
-
- init_get_bits(&gb, buf, buf_size * 8);
-
- if (get_bits_left(&gb) < 128)
- return -1;
-
- // Header; no useful information in here
- skip_bits_long(&gb, 128);
-
- if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
- return ret;
-
- new_y = frame->data[0];
- new_cb = frame->data[1];
- new_cr = frame->data[2];
- new_y_stride = frame->linesize[0];
- new_cb_stride = frame->linesize[1];
- new_cr_stride = frame->linesize[2];
- old_y = s->frame.data[0];
- old_cb = s->frame.data[1];
- old_cr = s->frame.data[2];
- old_y_stride = s->frame.linesize[0];
- old_cb_stride = s->frame.linesize[1];
- old_cr_stride = s->frame.linesize[2];
-
- av_log(avctx, AV_LOG_DEBUG,
- "Strides: %i, %i\n",
- new_y_stride, new_cb_stride);
-
- for (block_index = 0; block_index < total_blocks; block_index++) {
- // Note that this call will make us skip the rest of the blocks
- // if the frame prematurely ends
- if (skip == -1)
- skip = decode_skip_count(&gb);
-
- if (skip) {
- if (old_y) {
- y[0] = old_y[0] / 4;
- y[1] = old_y[1] / 4;
- y[2] = old_y[old_y_stride] / 4;
- y[3] = old_y[old_y_stride+1] / 4;
- y_base= yb[0];
- cb = old_cb[0] / 8;
- cr = old_cr[0] / 8;
- } else {
- y_base=y[0] = y[1] = y[2] = y[3] = 0;
- cb = cr = 16;
- }
- } else {
- if (get_bits1(&gb)) {
- static const uint8_t offset_table[] = {2, 4, 10, 20};
- static const int8_t sign_table[64][4] =
- { {0, 0, 0, 0},
- {-1, 1, 0, 0},
- {1, -1, 0, 0},
- {-1, 0, 1, 0},
- {-1, 1, 1, 0},
- {0, -1, 1, 0},
- {1, -1, 1, 0},
- {-1, -1, 1, 0},
- {1, 0, -1, 0},
- {0, 1, -1, 0},
- {1, 1, -1, 0},
- {-1, 1, -1, 0},
- {1, -1, -1, 0},
- {-1, 0, 0, 1},
- {-1, 1, 0, 1},
- {0, -1, 0, 1},
-
- {0, 0, 0, 0},
- {1, -1, 0, 1},
- {-1, -1, 0, 1},
- {-1, 0, 1, 1},
- {-1, 1, 1, 1},
- {0, -1, 1, 1},
- {1, -1, 1, 1},
- {-1, -1, 1, 1},
- {0, 0, -1, 1},
- {1, 0, -1, 1},
- {-1, 0, -1, 1},
- {0, 1, -1, 1},
- {1, 1, -1, 1},
- {-1, 1, -1, 1},
- {0, -1, -1, 1},
- {1, -1, -1, 1},
-
- {0, 0, 0, 0},
- {-1, -1, -1, 1},
- {1, 0, 0, -1},
- {0, 1, 0, -1},
- {1, 1, 0, -1},
- {-1, 1, 0, -1},
- {1, -1, 0, -1},
- {0, 0, 1, -1},
- {1, 0, 1, -1},
- {-1, 0, 1, -1},
- {0, 1, 1, -1},
- {1, 1, 1, -1},
- {-1, 1, 1, -1},
- {0, -1, 1, -1},
- {1, -1, 1, -1},
- {-1, -1, 1, -1},
-
- {0, 0, 0, 0},
- {1, 0, -1, -1},
- {0, 1, -1, -1},
- {1, 1, -1, -1},
- {-1, 1, -1, -1},
- {1, -1, -1, -1} };
- unsigned sign_selector = get_bits(&gb, 6);
- unsigned difference_selector = get_bits(&gb, 2);
- y_base = 2 * get_bits(&gb, 5);
- for (i = 0; i < 4; i++) {
- y[i] = av_clip((int)y_base + offset_table[difference_selector] *
- sign_table[sign_selector][i], 0, 63);
- }
- } else if (get_bits1(&gb)) {
- if (get_bits1(&gb)) {
- y_base = get_bits(&gb, 6);
- } else {
- unsigned adjust_index = get_bits(&gb, 3);
- static const int8_t adjust[] = {-4, -3, -2, -1, 1, 2, 3, 4};
- y_base = (y_base + adjust[adjust_index]) & 63;
- }
- for (i = 0; i < 4; i++)
- y[i] = y_base;
- }
-
- if (get_bits1(&gb)) {
- if (get_bits1(&gb)) {
- cb = get_bits(&gb, 5);
- cr = get_bits(&gb, 5);
- } else {
- unsigned adjust_index = get_bits(&gb, 3);
- static const int8_t adjust[2][8] =
- { { 1, 1, 0, -1, -1, -1, 0, 1 },
- { 0, 1, 1, 1, 0, -1, -1, -1 } };
- cb = (cb + adjust[0][adjust_index]) & 31;
- cr = (cr + adjust[1][adjust_index]) & 31;
- }
- }
- }
- *yb++= y_base;
-
- new_y[0] = y[0] * 4;
- new_y[1] = y[1] * 4;
- new_y[new_y_stride] = y[2] * 4;
- new_y[new_y_stride + 1] = y[3] * 4;
- *new_cb = cb * 8;
- *new_cr = cr * 8;
-
- if (old_y)
- old_y += 2, old_cb++, old_cr++;
- new_y += 2, new_cb++, new_cr++;
- row_index++;
- if (avctx->width / 2 == row_index) {
- row_index = 0;
- if (old_y) {
- old_y += old_y_stride * 2 - avctx->width;
- old_cb += old_cb_stride - avctx->width / 2;
- old_cr += old_cr_stride - avctx->width / 2;
- }
- new_y += new_y_stride * 2 - avctx->width;
- new_cb += new_cb_stride - avctx->width / 2;
- new_cr += new_cr_stride - avctx->width / 2;
- }
-
- skip--;
- }
-
- av_log(avctx, AV_LOG_DEBUG,
- "Escape sizes: %i, %i\n",
- buf_size, get_bits_count(&gb) / 8);
-
- av_frame_unref(&s->frame);
- if ((ret = av_frame_ref(&s->frame, frame)) < 0)
- return ret;
-
- *got_frame = 1;
-
- return buf_size;
-}
-
-
-AVCodec ff_escape130_decoder = {
- .name = "escape130",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_ESCAPE130,
- .priv_data_size = sizeof(Escape130Context),
- .init = escape130_decode_init,
- .close = escape130_decode_close,
- .decode = escape130_decode_frame,
- .capabilities = CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("Escape 130"),
-};
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