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Diffstat (limited to 'src/libffmpeg/libavcodec/cinepak.c')
-rw-r--r--src/libffmpeg/libavcodec/cinepak.c473
1 files changed, 0 insertions, 473 deletions
diff --git a/src/libffmpeg/libavcodec/cinepak.c b/src/libffmpeg/libavcodec/cinepak.c
deleted file mode 100644
index db0519b5d..000000000
--- a/src/libffmpeg/libavcodec/cinepak.c
+++ /dev/null
@@ -1,473 +0,0 @@
-/*
- * Cinepak Video Decoder
- * Copyright (C) 2003 the ffmpeg project
- *
- * 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
- *
- */
-
-/**
- * @file cinepak.c
- * Cinepak video decoder
- * by Ewald Snel <ewald@rambo.its.tudelft.nl>
- * For more information on the Cinepak algorithm, visit:
- * http://www.csse.monash.edu.au/~timf/
- * For more information on the quirky data inside Sega FILM/CPK files, visit:
- * http://wiki.multimedia.cx/index.php?title=Sega_FILM
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "common.h"
-#include "avcodec.h"
-#include "dsputil.h"
-
-
-typedef struct {
- uint8_t y0, y1, y2, y3;
- uint8_t u, v;
-} cvid_codebook_t;
-
-#define MAX_STRIPS 32
-
-typedef struct {
- uint16_t id;
- uint16_t x1, y1;
- uint16_t x2, y2;
- cvid_codebook_t v4_codebook[256];
- cvid_codebook_t v1_codebook[256];
-} cvid_strip_t;
-
-typedef struct CinepakContext {
-
- AVCodecContext *avctx;
- DSPContext dsp;
- AVFrame frame;
-
- unsigned char *data;
- int size;
-
- int width, height;
-
- int palette_video;
- cvid_strip_t strips[MAX_STRIPS];
-
- int sega_film_skip_bytes;
-
-} CinepakContext;
-
-static void cinepak_decode_codebook (cvid_codebook_t *codebook,
- int chunk_id, int size, uint8_t *data)
-{
- uint8_t *eod = (data + size);
- uint32_t flag, mask;
- int i, n;
-
- /* check if this chunk contains 4- or 6-element vectors */
- n = (chunk_id & 0x0400) ? 4 : 6;
- flag = 0;
- mask = 0;
-
- for (i=0; i < 256; i++) {
- if ((chunk_id & 0x0100) && !(mask >>= 1)) {
- if ((data + 4) > eod)
- break;
-
- flag = AV_RB32 (data);
- data += 4;
- mask = 0x80000000;
- }
-
- if (!(chunk_id & 0x0100) || (flag & mask)) {
- if ((data + n) > eod)
- break;
-
- if (n == 6) {
- codebook[i].y0 = *data++;
- codebook[i].y1 = *data++;
- codebook[i].y2 = *data++;
- codebook[i].y3 = *data++;
- codebook[i].u = 128 + *data++;
- codebook[i].v = 128 + *data++;
- } else {
- /* this codebook type indicates either greyscale or
- * palettized video; if palettized, U & V components will
- * not be used so it is safe to set them to 128 for the
- * benefit of greyscale rendering in YUV420P */
- codebook[i].y0 = *data++;
- codebook[i].y1 = *data++;
- codebook[i].y2 = *data++;
- codebook[i].y3 = *data++;
- codebook[i].u = 128;
- codebook[i].v = 128;
- }
- }
- }
-}
-
-static int cinepak_decode_vectors (CinepakContext *s, cvid_strip_t *strip,
- int chunk_id, int size, uint8_t *data)
-{
- uint8_t *eod = (data + size);
- uint32_t flag, mask;
- cvid_codebook_t *codebook;
- unsigned int x, y;
- uint32_t iy[4];
- uint32_t iu[2];
- uint32_t iv[2];
-
- flag = 0;
- mask = 0;
-
- for (y=strip->y1; y < strip->y2; y+=4) {
-
- iy[0] = strip->x1 + (y * s->frame.linesize[0]);
- iy[1] = iy[0] + s->frame.linesize[0];
- iy[2] = iy[1] + s->frame.linesize[0];
- iy[3] = iy[2] + s->frame.linesize[0];
- iu[0] = (strip->x1/2) + ((y/2) * s->frame.linesize[1]);
- iu[1] = iu[0] + s->frame.linesize[1];
- iv[0] = (strip->x1/2) + ((y/2) * s->frame.linesize[2]);
- iv[1] = iv[0] + s->frame.linesize[2];
-
- for (x=strip->x1; x < strip->x2; x+=4) {
- if ((chunk_id & 0x0100) && !(mask >>= 1)) {
- if ((data + 4) > eod)
- return -1;
-
- flag = AV_RB32 (data);
- data += 4;
- mask = 0x80000000;
- }
-
- if (!(chunk_id & 0x0100) || (flag & mask)) {
- if (!(chunk_id & 0x0200) && !(mask >>= 1)) {
- if ((data + 4) > eod)
- return -1;
-
- flag = AV_RB32 (data);
- data += 4;
- mask = 0x80000000;
- }
-
- if ((chunk_id & 0x0200) || (~flag & mask)) {
- if (data >= eod)
- return -1;
-
- codebook = &strip->v1_codebook[*data++];
- s->frame.data[0][iy[0] + 0] = codebook->y0;
- s->frame.data[0][iy[0] + 1] = codebook->y0;
- s->frame.data[0][iy[1] + 0] = codebook->y0;
- s->frame.data[0][iy[1] + 1] = codebook->y0;
- if (!s->palette_video) {
- s->frame.data[1][iu[0]] = codebook->u;
- s->frame.data[2][iv[0]] = codebook->v;
- }
-
- s->frame.data[0][iy[0] + 2] = codebook->y1;
- s->frame.data[0][iy[0] + 3] = codebook->y1;
- s->frame.data[0][iy[1] + 2] = codebook->y1;
- s->frame.data[0][iy[1] + 3] = codebook->y1;
- if (!s->palette_video) {
- s->frame.data[1][iu[0] + 1] = codebook->u;
- s->frame.data[2][iv[0] + 1] = codebook->v;
- }
-
- s->frame.data[0][iy[2] + 0] = codebook->y2;
- s->frame.data[0][iy[2] + 1] = codebook->y2;
- s->frame.data[0][iy[3] + 0] = codebook->y2;
- s->frame.data[0][iy[3] + 1] = codebook->y2;
- if (!s->palette_video) {
- s->frame.data[1][iu[1]] = codebook->u;
- s->frame.data[2][iv[1]] = codebook->v;
- }
-
- s->frame.data[0][iy[2] + 2] = codebook->y3;
- s->frame.data[0][iy[2] + 3] = codebook->y3;
- s->frame.data[0][iy[3] + 2] = codebook->y3;
- s->frame.data[0][iy[3] + 3] = codebook->y3;
- if (!s->palette_video) {
- s->frame.data[1][iu[1] + 1] = codebook->u;
- s->frame.data[2][iv[1] + 1] = codebook->v;
- }
-
- } else if (flag & mask) {
- if ((data + 4) > eod)
- return -1;
-
- codebook = &strip->v4_codebook[*data++];
- s->frame.data[0][iy[0] + 0] = codebook->y0;
- s->frame.data[0][iy[0] + 1] = codebook->y1;
- s->frame.data[0][iy[1] + 0] = codebook->y2;
- s->frame.data[0][iy[1] + 1] = codebook->y3;
- if (!s->palette_video) {
- s->frame.data[1][iu[0]] = codebook->u;
- s->frame.data[2][iv[0]] = codebook->v;
- }
-
- codebook = &strip->v4_codebook[*data++];
- s->frame.data[0][iy[0] + 2] = codebook->y0;
- s->frame.data[0][iy[0] + 3] = codebook->y1;
- s->frame.data[0][iy[1] + 2] = codebook->y2;
- s->frame.data[0][iy[1] + 3] = codebook->y3;
- if (!s->palette_video) {
- s->frame.data[1][iu[0] + 1] = codebook->u;
- s->frame.data[2][iv[0] + 1] = codebook->v;
- }
-
- codebook = &strip->v4_codebook[*data++];
- s->frame.data[0][iy[2] + 0] = codebook->y0;
- s->frame.data[0][iy[2] + 1] = codebook->y1;
- s->frame.data[0][iy[3] + 0] = codebook->y2;
- s->frame.data[0][iy[3] + 1] = codebook->y3;
- if (!s->palette_video) {
- s->frame.data[1][iu[1]] = codebook->u;
- s->frame.data[2][iv[1]] = codebook->v;
- }
-
- codebook = &strip->v4_codebook[*data++];
- s->frame.data[0][iy[2] + 2] = codebook->y0;
- s->frame.data[0][iy[2] + 3] = codebook->y1;
- s->frame.data[0][iy[3] + 2] = codebook->y2;
- s->frame.data[0][iy[3] + 3] = codebook->y3;
- if (!s->palette_video) {
- s->frame.data[1][iu[1] + 1] = codebook->u;
- s->frame.data[2][iv[1] + 1] = codebook->v;
- }
-
- }
- }
-
- iy[0] += 4; iy[1] += 4;
- iy[2] += 4; iy[3] += 4;
- iu[0] += 2; iu[1] += 2;
- iv[0] += 2; iv[1] += 2;
- }
- }
-
- return 0;
-}
-
-static int cinepak_decode_strip (CinepakContext *s,
- cvid_strip_t *strip, uint8_t *data, int size)
-{
- uint8_t *eod = (data + size);
- int chunk_id, chunk_size;
-
- /* coordinate sanity checks */
- if (strip->x1 >= s->width || strip->x2 > s->width ||
- strip->y1 >= s->height || strip->y2 > s->height ||
- strip->x1 >= strip->x2 || strip->y1 >= strip->y2)
- return -1;
-
- while ((data + 4) <= eod) {
- chunk_id = AV_RB16 (&data[0]);
- chunk_size = AV_RB16 (&data[2]) - 4;
- if(chunk_size < 0)
- return -1;
-
- data += 4;
- chunk_size = ((data + chunk_size) > eod) ? (eod - data) : chunk_size;
-
- switch (chunk_id) {
-
- case 0x2000:
- case 0x2100:
- case 0x2400:
- case 0x2500:
- cinepak_decode_codebook (strip->v4_codebook, chunk_id,
- chunk_size, data);
- break;
-
- case 0x2200:
- case 0x2300:
- case 0x2600:
- case 0x2700:
- cinepak_decode_codebook (strip->v1_codebook, chunk_id,
- chunk_size, data);
- break;
-
- case 0x3000:
- case 0x3100:
- case 0x3200:
- return cinepak_decode_vectors (s, strip, chunk_id,
- chunk_size, data);
- }
-
- data += chunk_size;
- }
-
- return -1;
-}
-
-static int cinepak_decode (CinepakContext *s)
-{
- uint8_t *eod = (s->data + s->size);
- int i, result, strip_size, frame_flags, num_strips;
- int y0 = 0;
- int encoded_buf_size;
-
- if (s->size < 10)
- return -1;
-
- frame_flags = s->data[0];
- num_strips = AV_RB16 (&s->data[8]);
- encoded_buf_size = ((s->data[1] << 16) | AV_RB16 (&s->data[2]));
-
- /* if this is the first frame, check for deviant Sega FILM data */
- if (s->sega_film_skip_bytes == -1) {
- if (encoded_buf_size != s->size) {
- /* If the encoded frame size differs from the frame size as indicated
- * by the container file, this data likely comes from a Sega FILM/CPK file.
- * If the frame header is followed by the bytes FE 00 00 06 00 00 then
- * this is probably one of the two known files that have 6 extra bytes
- * after the frame header. Else, assume 2 extra bytes. */
- if ((s->data[10] == 0xFE) &&
- (s->data[11] == 0x00) &&
- (s->data[12] == 0x00) &&
- (s->data[13] == 0x06) &&
- (s->data[14] == 0x00) &&
- (s->data[15] == 0x00))
- s->sega_film_skip_bytes = 6;
- else
- s->sega_film_skip_bytes = 2;
- } else
- s->sega_film_skip_bytes = 0;
- }
-
- s->data += 10 + s->sega_film_skip_bytes;
-
- if (num_strips > MAX_STRIPS)
- num_strips = MAX_STRIPS;
-
- for (i=0; i < num_strips; i++) {
- if ((s->data + 12) > eod)
- return -1;
-
- s->strips[i].id = AV_RB16 (s->data);
- s->strips[i].y1 = y0;
- s->strips[i].x1 = 0;
- s->strips[i].y2 = y0 + AV_RB16 (&s->data[8]);
- s->strips[i].x2 = s->avctx->width;
-
- strip_size = AV_RB16 (&s->data[2]) - 12;
- s->data += 12;
- strip_size = ((s->data + strip_size) > eod) ? (eod - s->data) : strip_size;
-
- if ((i > 0) && !(frame_flags & 0x01)) {
- memcpy (s->strips[i].v4_codebook, s->strips[i-1].v4_codebook,
- sizeof(s->strips[i].v4_codebook));
- memcpy (s->strips[i].v1_codebook, s->strips[i-1].v1_codebook,
- sizeof(s->strips[i].v1_codebook));
- }
-
- result = cinepak_decode_strip (s, &s->strips[i], s->data, strip_size);
-
- if (result != 0)
- return result;
-
- s->data += strip_size;
- y0 = s->strips[i].y2;
- }
- return 0;
-}
-
-static int cinepak_decode_init(AVCodecContext *avctx)
-{
- CinepakContext *s = (CinepakContext *)avctx->priv_data;
-
- s->avctx = avctx;
- s->width = (avctx->width + 3) & ~3;
- s->height = (avctx->height + 3) & ~3;
- s->sega_film_skip_bytes = -1; /* uninitialized state */
-
- // check for paletted data
- if ((avctx->palctrl == NULL) || (avctx->bits_per_sample == 40)) {
- s->palette_video = 0;
- avctx->pix_fmt = PIX_FMT_YUV420P;
- } else {
- s->palette_video = 1;
- avctx->pix_fmt = PIX_FMT_PAL8;
- }
-
- avctx->has_b_frames = 0;
- dsputil_init(&s->dsp, avctx);
-
- s->frame.data[0] = NULL;
-
- return 0;
-}
-
-static int cinepak_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
-{
- CinepakContext *s = (CinepakContext *)avctx->priv_data;
-
- s->data = buf;
- s->size = buf_size;
-
- s->frame.reference = 1;
- s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE |
- FF_BUFFER_HINTS_REUSABLE;
- if (avctx->reget_buffer(avctx, &s->frame)) {
- av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
- return -1;
- }
-
- cinepak_decode(s);
-
- if (s->palette_video) {
- memcpy (s->frame.data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
- if (avctx->palctrl->palette_changed) {
- s->frame.palette_has_changed = 1;
- avctx->palctrl->palette_changed = 0;
- } else
- s->frame.palette_has_changed = 0;
- }
-
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = s->frame;
-
- /* report that the buffer was completely consumed */
- return buf_size;
-}
-
-static int cinepak_decode_end(AVCodecContext *avctx)
-{
- CinepakContext *s = (CinepakContext *)avctx->priv_data;
-
- if (s->frame.data[0])
- avctx->release_buffer(avctx, &s->frame);
-
- return 0;
-}
-
-AVCodec cinepak_decoder = {
- "cinepak",
- CODEC_TYPE_VIDEO,
- CODEC_ID_CINEPAK,
- sizeof(CinepakContext),
- cinepak_decode_init,
- NULL,
- cinepak_decode_end,
- cinepak_decode_frame,
- CODEC_CAP_DR1,
-};
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