/*
- * Id Quake II CIN Video Decoder
+ * id Quake II CIN Video Decoder
* Copyright (C) 2003 the ffmpeg project
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
*/
/**
- * @file idcinvideo.c
- * Id Quake II Cin Video Decoder by Dr. Tim Ferguson
- * For more information about the Id CIN format, visit:
+ * @file
+ * id Quake II Cin Video Decoder by Dr. Tim Ferguson
+ * For more information about the id CIN format, visit:
* http://www.csse.monash.edu.au/~timf/
*
* This video decoder outputs PAL8 colorspace data. Interacting with this
* the demuxer must use the same extradata space to transmit an
* AVPaletteControl structure.
*
- * Id CIN video is purely Huffman-coded, intraframe-only codec. It achieves
+ * id CIN video is purely Huffman-coded, intraframe-only codec. It achieves
* a little more compression by exploiting the fact that adjacent pixels
* tend to be similar.
*
- * Note that this decoder could use ffmpeg's optimized VLC facilities
+ * Note that this decoder could use libavcodec's optimized VLC facilities
* rather than naive, tree-based Huffman decoding. However, there are 256
* Huffman tables. Plus, the VLC bit coding order is right -> left instead
* or left -> right, so all of the bits would have to be reversed. Further,
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <unistd.h>
-#include "common.h"
#include "avcodec.h"
-#include "dsputil.h"
+#include "internal.h"
+#include "libavutil/internal.h"
#define HUFFMAN_TABLE_SIZE 64 * 1024
#define HUF_TOKENS 256
#define PALETTE_COUNT 256
-typedef struct
-{
+typedef struct hnode {
int count;
unsigned char used;
int children[2];
-} hnode_t;
+} hnode;
typedef struct IdcinContext {
AVCodecContext *avctx;
- DSPContext dsp;
- AVFrame frame;
- unsigned char *buf;
+ const unsigned char *buf;
int size;
- hnode_t huff_nodes[256][HUF_TOKENS*2];
+ hnode huff_nodes[256][HUF_TOKENS*2];
int num_huff_nodes[256];
+ uint32_t pal[256];
} IdcinContext;
/*
* Find the lowest probability node in a Huffman table, and mark it as
* being assigned to a higher probability.
- * Returns the node index of the lowest unused node, or -1 if all nodes
+ * @return the node index of the lowest unused node, or -1 if all nodes
* are used.
*/
-static int huff_smallest_node(hnode_t *hnodes, int num_hnodes) {
+static int huff_smallest_node(hnode *hnodes, int num_hnodes) {
int i;
int best, best_node;
* num_huff_nodes[prev] - contains the index to the root node of the tree.
* That is: huff_nodes[prev][num_huff_nodes[prev]] is the root node.
*/
-static void huff_build_tree(IdcinContext *s, int prev) {
- hnode_t *node, *hnodes;
+static av_cold void huff_build_tree(IdcinContext *s, int prev) {
+ hnode *node, *hnodes;
int num_hnodes, i;
num_hnodes = HUF_TOKENS;
s->num_huff_nodes[prev] = num_hnodes - 1;
}
-static int idcin_decode_init(AVCodecContext *avctx)
+static av_cold int idcin_decode_init(AVCodecContext *avctx)
{
- IdcinContext *s = (IdcinContext *)avctx->priv_data;
+ IdcinContext *s = avctx->priv_data;
int i, j, histogram_index = 0;
unsigned char *histograms;
s->avctx = avctx;
- avctx->pix_fmt = PIX_FMT_PAL8;
- dsputil_init(&s->dsp, avctx);
+ avctx->pix_fmt = AV_PIX_FMT_PAL8;
/* make sure the Huffman tables make it */
if (s->avctx->extradata_size != HUFFMAN_TABLE_SIZE) {
- av_log(s->avctx, AV_LOG_ERROR, " Id CIN video: expected extradata size of %d\n", HUFFMAN_TABLE_SIZE);
+ av_log(s->avctx, AV_LOG_ERROR, " id CIN video: expected extradata size of %d\n", HUFFMAN_TABLE_SIZE);
return -1;
}
huff_build_tree(s, i);
}
- s->frame.data[0] = NULL;
-
return 0;
}
-static void idcin_decode_vlcs(IdcinContext *s)
+static void idcin_decode_vlcs(IdcinContext *s, AVFrame *frame)
{
- hnode_t *hnodes;
+ hnode *hnodes;
long x, y;
int prev;
unsigned char v = 0;
int bit_pos, node_num, dat_pos;
prev = bit_pos = dat_pos = 0;
- for (y = 0; y < (s->frame.linesize[0] * s->avctx->height);
- y += s->frame.linesize[0]) {
+ for (y = 0; y < (frame->linesize[0] * s->avctx->height);
+ y += frame->linesize[0]) {
for (x = y; x < y + s->avctx->width; x++) {
node_num = s->num_huff_nodes[prev];
hnodes = s->huff_nodes[prev];
bit_pos--;
}
- s->frame.data[0][x] = node_num;
+ frame->data[0][x] = node_num;
prev = node_num;
}
}
}
static int idcin_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ void *data, int *got_frame,
+ AVPacket *avpkt)
{
- IdcinContext *s = (IdcinContext *)avctx->priv_data;
- AVPaletteControl *palette_control = avctx->palctrl;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ IdcinContext *s = avctx->priv_data;
+ const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
+ AVFrame *frame = data;
+ int ret;
s->buf = buf;
s->size = buf_size;
- if (s->frame.data[0])
- avctx->release_buffer(avctx, &s->frame);
-
- if (avctx->get_buffer(avctx, &s->frame)) {
- av_log(avctx, AV_LOG_ERROR, " Id CIN Video: get_buffer() failed\n");
- return -1;
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, " id CIN Video: get_buffer() failed\n");
+ return ret;
}
- idcin_decode_vlcs(s);
+ idcin_decode_vlcs(s, frame);
- /* make the palette available on the way out */
- memcpy(s->frame.data[1], palette_control->palette, PALETTE_COUNT * 4);
- /* If palette changed inform application*/
- if (palette_control->palette_changed) {
- palette_control->palette_changed = 0;
- s->frame.palette_has_changed = 1;
+ if (pal) {
+ frame->palette_has_changed = 1;
+ memcpy(s->pal, pal, AVPALETTE_SIZE);
}
+ /* make the palette available on the way out */
+ memcpy(frame->data[1], s->pal, AVPALETTE_SIZE);
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = s->frame;
+ *got_frame = 1;
/* report that the buffer was completely consumed */
return buf_size;
}
-static int idcin_decode_end(AVCodecContext *avctx)
-{
- IdcinContext *s = (IdcinContext *)avctx->priv_data;
-
- if (s->frame.data[0])
- avctx->release_buffer(avctx, &s->frame);
-
- return 0;
-}
-
-AVCodec idcin_decoder = {
- "idcinvideo",
- CODEC_TYPE_VIDEO,
- CODEC_ID_IDCIN,
- sizeof(IdcinContext),
- idcin_decode_init,
- NULL,
- idcin_decode_end,
- idcin_decode_frame,
- CODEC_CAP_DR1,
+AVCodec ff_idcin_decoder = {
+ .name = "idcinvideo",
+ .long_name = NULL_IF_CONFIG_SMALL("id Quake II CIN video"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_IDCIN,
+ .priv_data_size = sizeof(IdcinContext),
+ .init = idcin_decode_init,
+ .decode = idcin_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
};
-
projects / ffmpeg / blobdiff