* Motion Pixels Video Decoder
* Copyright (c) 2008 Gregory Montoir (cyx@users.sourceforge.net)
*
- * 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
*/
#include "avcodec.h"
-#include "bitstream.h"
+#include "get_bits.h"
#include "dsputil.h"
#define MAX_HUFF_CODES 16
-typedef struct YuvPixel {
- int8_t y, v, u;
-} YuvPixel;
+#include "motionpixels_tablegen.h"
typedef struct HuffCode {
int code;
int bswapbuf_size;
} MotionPixelsContext;
-static YuvPixel mp_rgb_yuv_table[1 << 15];
-
-static int mp_yuv_to_rgb(int y, int v, int u, int clip_rgb) {
- static const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
- int r, g, b;
-
- r = (1000 * y + 701 * v) / 1000;
- g = (1000 * y - 357 * v - 172 * u) / 1000;
- b = (1000 * y + 886 * u) / 1000;
- if (clip_rgb)
- return ((cm[r * 8] & 0xF8) << 7) | ((cm[g * 8] & 0xF8) << 2) | (cm[b * 8] >> 3);
- if ((unsigned)r < 32 && (unsigned)g < 32 && (unsigned)b < 32)
- return (r << 10) | (g << 5) | b;
- return 1 << 15;
-}
-
-static void mp_set_zero_yuv(YuvPixel *p)
-{
- int i, j;
-
- for (i = 0; i < 31; ++i) {
- for (j = 31; j > i; --j)
- if (!(p[j].u | p[j].v | p[j].y))
- p[j] = p[j - 1];
- for (j = 0; j < 31 - i; ++j)
- if (!(p[j].u | p[j].v | p[j].y))
- p[j] = p[j + 1];
- }
-}
-
-static void mp_build_rgb_yuv_table(YuvPixel *p)
-{
- int y, v, u, i;
-
- for (y = 0; y <= 31; ++y)
- for (v = -31; v <= 31; ++v)
- for (u = -31; u <= 31; ++u) {
- i = mp_yuv_to_rgb(y, v, u, 0);
- if (i < (1 << 15) && !(p[i].u | p[i].v | p[i].y)) {
- p[i].y = y;
- p[i].v = v;
- p[i].u = u;
- }
- }
- for (i = 0; i < 1024; ++i)
- mp_set_zero_yuv(p + i * 32);
-}
-
static av_cold int mp_decode_init(AVCodecContext *avctx)
{
MotionPixelsContext *mp = avctx->priv_data;
+ int w4 = (avctx->width + 3) & ~3;
+ int h4 = (avctx->height + 3) & ~3;
- if (!mp_rgb_yuv_table[0].u) {
- mp_build_rgb_yuv_table(mp_rgb_yuv_table);
- }
+ motionpixels_tableinit();
mp->avctx = avctx;
dsputil_init(&mp->dsp, avctx);
- mp->changes_map = av_mallocz(avctx->width * avctx->height);
+ mp->changes_map = av_mallocz(avctx->width * h4);
mp->offset_bits_len = av_log2(avctx->width * avctx->height) + 1;
mp->vpt = av_mallocz(avctx->height * sizeof(YuvPixel));
- mp->hpt = av_mallocz(avctx->height * avctx->width / 16 * sizeof(YuvPixel));
+ mp->hpt = av_mallocz(h4 * w4 / 16 * sizeof(YuvPixel));
+ avctx->pix_fmt = PIX_FMT_RGB555;
return 0;
}
static int mp_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- const uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
MotionPixelsContext *mp = avctx->priv_data;
GetBitContext gb;
int i, count1, count2, sz;
}
/* le32 bitstream msb first */
- mp->bswapbuf = av_fast_realloc(mp->bswapbuf, &mp->bswapbuf_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
+ av_fast_malloc(&mp->bswapbuf, &mp->bswapbuf_size, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!mp->bswapbuf)
+ return AVERROR(ENOMEM);
mp->dsp.bswap_buf((uint32_t *)mp->bswapbuf, (const uint32_t *)buf, buf_size / 4);
if (buf_size & 3)
memcpy(mp->bswapbuf + (buf_size & ~3), buf + (buf_size & ~3), buf_size & 3);
+ memset(mp->bswapbuf + buf_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
init_get_bits(&gb, mp->bswapbuf, buf_size * 8);
memset(mp->changes_map, 0, avctx->width * avctx->height);
if (sz == 0)
goto end;
- init_vlc(&mp->vlc, mp->max_codes_bits, mp->codes_count, &mp->codes[0].size, sizeof(HuffCode), 1, &mp->codes[0].code, sizeof(HuffCode), 4, 0);
+ if (mp->max_codes_bits <= 0)
+ goto end;
+ if (init_vlc(&mp->vlc, mp->max_codes_bits, mp->codes_count, &mp->codes[0].size, sizeof(HuffCode), 1, &mp->codes[0].code, sizeof(HuffCode), 4, 0))
+ goto end;
mp_decode_frame_helper(mp, &gb);
free_vlc(&mp->vlc);
return 0;
}
-AVCodec motionpixels_decoder = {
- "motionpixels",
- CODEC_TYPE_VIDEO,
- CODEC_ID_MOTIONPIXELS,
- sizeof(MotionPixelsContext),
- mp_decode_init,
- NULL,
- mp_decode_end,
- mp_decode_frame,
- CODEC_CAP_DR1,
+AVCodec ff_motionpixels_decoder = {
+ .name = "motionpixels",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_MOTIONPIXELS,
+ .priv_data_size = sizeof(MotionPixelsContext),
+ .init = mp_decode_init,
+ .close = mp_decode_end,
+ .decode = mp_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Motion Pixels video"),
};
projects / ffmpeg / blobdiff