* LOCO codec
* Copyright (c) 2005 Konstantin Shishkov
*
- * 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 loco.c
+ * @file
* LOCO codec.
*/
#include "avcodec.h"
-#include "bitstream.h"
+#include "get_bits.h"
#include "golomb.h"
+#include "internal.h"
+#include "mathops.h"
-enum LOCO_MODE {LOCO_UNKN=0, LOCO_CYUY2=-1, LOCO_CRGB=-2, LOCO_CRGBA=-3, LOCO_CYV12=-4,
- LOCO_YUY2=1, LOCO_UYVY=2, LOCO_RGB=3, LOCO_RGBA=4, LOCO_YV12=5};
+enum LOCO_MODE {
+ LOCO_UNKN = 0,
+ LOCO_CYUY2 = -1,
+ LOCO_CRGB = -2,
+ LOCO_CRGBA = -3,
+ LOCO_CYV12 = -4,
+ LOCO_YUY2 = 1,
+ LOCO_UYVY = 2,
+ LOCO_RGB = 3,
+ LOCO_RGBA = 4,
+ LOCO_YV12 = 5,
+};
-typedef struct LOCOContext{
+typedef struct LOCOContext {
AVCodecContext *avctx;
- AVFrame pic;
int lossy;
int mode;
} LOCOContext;
-typedef struct RICEContext{
+typedef struct RICEContext {
GetBitContext gb;
int save, run, run2; /* internal rice decoder state */
int sum, count; /* sum and count for getting rice parameter */
int lossy;
-}RICEContext;
+} RICEContext;
static int loco_get_rice_param(RICEContext *r)
{
int cnt = 0;
int val = r->count;
- while(r->sum > val && cnt < 9) {
+ while (r->sum > val && cnt < 9) {
val <<= 1;
cnt++;
}
r->sum += val;
r->count++;
- if(r->count == 16) {
- r->sum >>= 1;
+ if (r->count == 16) {
+ r->sum >>= 1;
r->count >>= 1;
}
}
return 0;
}
v = get_ur_golomb_jpegls(&r->gb, loco_get_rice_param(r), INT_MAX, 0);
- loco_update_rice_param(r, (v+1)>>1);
+ loco_update_rice_param(r, (v + 1) >> 1);
if (!v) {
if (r->save >= 0) {
r->run = get_ur_golomb_jpegls(&r->gb, 2, INT_MAX, 0);
- if(r->run > 1)
+ if (r->run > 1)
r->save += r->run + 1;
else
r->save -= 3;
- }
- else
+ } else
r->run2++;
} else {
- v = ((v>>1) + r->lossy) ^ -(v&1);
+ v = ((v >> 1) + r->lossy) ^ -(v & 1);
if (r->run2 > 0) {
if (r->run2 > 2)
r->save += r->run2;
int i, j;
init_get_bits(&rc.gb, buf, buf_size*8);
- rc.save = 0;
- rc.run = 0;
- rc.run2 = 0;
+ rc.save = 0;
+ rc.run = 0;
+ rc.run2 = 0;
rc.lossy = l->lossy;
- rc.sum = 8;
+ rc.sum = 8;
rc.count = 1;
/* restore top left pixel */
- val = loco_get_rice(&rc);
+ val = loco_get_rice(&rc);
data[0] = 128 + val;
/* restore top line */
for (i = 1; i < width; i++) {
data += stride;
}
- return ((get_bits_count(&rc.gb) + 7) >> 3);
+ return (get_bits_count(&rc.gb) + 7) >> 3;
}
static int decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- const uint8_t *buf, int buf_size)
+ void *data, int *got_frame,
+ AVPacket *avpkt)
{
LOCOContext * const l = avctx->priv_data;
- AVFrame * const p= (AVFrame*)&l->pic;
- int decoded;
-
- if(p->data[0])
- avctx->release_buffer(avctx, p);
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ AVFrame * const p = data;
+ int decoded, ret;
- p->reference = 0;
- if(avctx->get_buffer(avctx, p) < 0){
+ if ((ret = ff_get_buffer(avctx, p, 0)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
+ return ret;
}
p->key_frame = 1;
case LOCO_CYUY2: case LOCO_YUY2: case LOCO_UYVY:
decoded = loco_decode_plane(l, p->data[0], avctx->width, avctx->height,
p->linesize[0], buf, buf_size, 1);
+ if (decoded >= buf_size)
+ goto buf_too_small;
buf += decoded; buf_size -= decoded;
+
decoded = loco_decode_plane(l, p->data[1], avctx->width / 2, avctx->height,
p->linesize[1], buf, buf_size, 1);
+ if (decoded >= buf_size)
+ goto buf_too_small;
buf += decoded; buf_size -= decoded;
+
decoded = loco_decode_plane(l, p->data[2], avctx->width / 2, avctx->height,
p->linesize[2], buf, buf_size, 1);
break;
case LOCO_CYV12: case LOCO_YV12:
decoded = loco_decode_plane(l, p->data[0], avctx->width, avctx->height,
p->linesize[0], buf, buf_size, 1);
+ if (decoded >= buf_size)
+ goto buf_too_small;
buf += decoded; buf_size -= decoded;
+
decoded = loco_decode_plane(l, p->data[2], avctx->width / 2, avctx->height / 2,
p->linesize[2], buf, buf_size, 1);
+ if (decoded >= buf_size)
+ goto buf_too_small;
buf += decoded; buf_size -= decoded;
+
decoded = loco_decode_plane(l, p->data[1], avctx->width / 2, avctx->height / 2,
p->linesize[1], buf, buf_size, 1);
break;
case LOCO_CRGB: case LOCO_RGB:
decoded = loco_decode_plane(l, p->data[0] + p->linesize[0]*(avctx->height-1), avctx->width, avctx->height,
-p->linesize[0], buf, buf_size, 3);
+ if (decoded >= buf_size)
+ goto buf_too_small;
buf += decoded; buf_size -= decoded;
+
decoded = loco_decode_plane(l, p->data[0] + p->linesize[0]*(avctx->height-1) + 1, avctx->width, avctx->height,
-p->linesize[0], buf, buf_size, 3);
+ if (decoded >= buf_size)
+ goto buf_too_small;
buf += decoded; buf_size -= decoded;
+
decoded = loco_decode_plane(l, p->data[0] + p->linesize[0]*(avctx->height-1) + 2, avctx->width, avctx->height,
-p->linesize[0], buf, buf_size, 3);
break;
case LOCO_RGBA:
decoded = loco_decode_plane(l, p->data[0], avctx->width, avctx->height,
p->linesize[0], buf, buf_size, 4);
+ if (decoded >= buf_size)
+ goto buf_too_small;
buf += decoded; buf_size -= decoded;
+
decoded = loco_decode_plane(l, p->data[0] + 1, avctx->width, avctx->height,
p->linesize[0], buf, buf_size, 4);
+ if (decoded >= buf_size)
+ goto buf_too_small;
buf += decoded; buf_size -= decoded;
+
decoded = loco_decode_plane(l, p->data[0] + 2, avctx->width, avctx->height,
p->linesize[0], buf, buf_size, 4);
+ if (decoded >= buf_size)
+ goto buf_too_small;
buf += decoded; buf_size -= decoded;
+
decoded = loco_decode_plane(l, p->data[0] + 3, avctx->width, avctx->height,
p->linesize[0], buf, buf_size, 4);
break;
}
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = l->pic;
+ *got_frame = 1;
return buf_size;
+buf_too_small:
+ av_log(avctx, AV_LOG_ERROR, "Input data too small.\n");
+ return AVERROR(EINVAL);
}
-static int decode_init(AVCodecContext *avctx){
+static av_cold int decode_init(AVCodecContext *avctx)
+{
LOCOContext * const l = avctx->priv_data;
int version;
if (avctx->extradata_size < 12) {
av_log(avctx, AV_LOG_ERROR, "Extradata size must be >= 12 instead of %i\n",
avctx->extradata_size);
- return -1;
+ return AVERROR_INVALIDDATA;
}
version = AV_RL32(avctx->extradata);
- switch(version) {
+ switch (version) {
case 1:
l->lossy = 0;
break;
break;
default:
l->lossy = AV_RL32(avctx->extradata + 8);
- av_log(avctx, AV_LOG_INFO, "This is LOCO codec version %i, please upload file for study\n", version);
+ avpriv_request_sample(avctx, "LOCO codec version %i", version);
}
l->mode = AV_RL32(avctx->extradata + 4);
- switch(l->mode) {
- case LOCO_CYUY2: case LOCO_YUY2: case LOCO_UYVY:
- avctx->pix_fmt = PIX_FMT_YUV422P;
+ switch (l->mode) {
+ case LOCO_CYUY2:
+ case LOCO_YUY2:
+ case LOCO_UYVY:
+ avctx->pix_fmt = AV_PIX_FMT_YUV422P;
break;
- case LOCO_CRGB: case LOCO_RGB:
- avctx->pix_fmt = PIX_FMT_BGR24;
+ case LOCO_CRGB:
+ case LOCO_RGB:
+ avctx->pix_fmt = AV_PIX_FMT_BGR24;
break;
- case LOCO_CYV12: case LOCO_YV12:
- avctx->pix_fmt = PIX_FMT_YUV420P;
+ case LOCO_CYV12:
+ case LOCO_YV12:
+ avctx->pix_fmt = AV_PIX_FMT_YUV420P;
break;
- case LOCO_CRGBA: case LOCO_RGBA:
- avctx->pix_fmt = PIX_FMT_RGB32;
+ case LOCO_CRGBA:
+ case LOCO_RGBA:
+ avctx->pix_fmt = AV_PIX_FMT_RGB32;
break;
default:
av_log(avctx, AV_LOG_INFO, "Unknown colorspace, index = %i\n", l->mode);
- return -1;
+ return AVERROR_INVALIDDATA;
}
- if(avctx->debug & FF_DEBUG_PICT_INFO)
+ if (avctx->debug & FF_DEBUG_PICT_INFO)
av_log(avctx, AV_LOG_INFO, "lossy:%i, version:%i, mode: %i\n", l->lossy, version, l->mode);
return 0;
}
-AVCodec loco_decoder = {
- "loco",
- CODEC_TYPE_VIDEO,
- CODEC_ID_LOCO,
- sizeof(LOCOContext),
- decode_init,
- NULL,
- NULL,
- decode_frame,
- CODEC_CAP_DR1,
+AVCodec ff_loco_decoder = {
+ .name = "loco",
+ .long_name = NULL_IF_CONFIG_SMALL("LOCO"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_LOCO,
+ .priv_data_size = sizeof(LOCOContext),
+ .init = decode_init,
+ .decode = decode_frame,
+ .capabilities = AV_CODEC_CAP_DR1,
};
projects / ffmpeg / blobdiff