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Diffstat (limited to 'ffmpeg/libavcodec/cinepak.c')
-rw-r--r--ffmpeg/libavcodec/cinepak.c488
1 files changed, 0 insertions, 488 deletions
diff --git a/ffmpeg/libavcodec/cinepak.c b/ffmpeg/libavcodec/cinepak.c
deleted file mode 100644
index 082d0b2..0000000
--- a/ffmpeg/libavcodec/cinepak.c
+++ /dev/null
@@ -1,488 +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 video decoder
- * @author Ewald Snel <ewald@rambo.its.tudelft.nl>
- *
- * @see For more information on the Cinepak algorithm, visit:
- * http://www.csse.monash.edu.au/~timf/
- * @see For more information on the quirky data inside Sega FILM/CPK files, visit:
- * http://wiki.multimedia.cx/index.php?title=Sega_FILM
- *
- * Cinepak colorspace support (c) 2013 Rl, Aetey Global Technologies AB
- * @author Cinepak colorspace, Rl, Aetey Global Technologies AB
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "libavutil/common.h"
-#include "libavutil/intreadwrite.h"
-#include "avcodec.h"
-#include "internal.h"
-
-
-typedef uint8_t cvid_codebook[12];
-
-#define MAX_STRIPS 32
-
-typedef struct {
- uint16_t id;
- uint16_t x1, y1;
- uint16_t x2, y2;
- cvid_codebook v4_codebook[256];
- cvid_codebook v1_codebook[256];
-} cvid_strip;
-
-typedef struct CinepakContext {
-
- AVCodecContext *avctx;
- AVFrame *frame;
-
- const unsigned char *data;
- int size;
-
- int width, height;
-
- int palette_video;
- cvid_strip strips[MAX_STRIPS];
-
- int sega_film_skip_bytes;
-
- uint32_t pal[256];
-} CinepakContext;
-
-static void cinepak_decode_codebook (cvid_codebook *codebook,
- int chunk_id, int size, const uint8_t *data)
-{
- const uint8_t *eod = (data + size);
- uint32_t flag, mask;
- int i, n;
- uint8_t *p;
-
- /* check if this chunk contains 4- or 6-element vectors */
- n = (chunk_id & 0x04) ? 4 : 6;
- flag = 0;
- mask = 0;
-
- p = codebook[0];
- for (i=0; i < 256; i++) {
- if ((chunk_id & 0x01) && !(mask >>= 1)) {
- if ((data + 4) > eod)
- break;
-
- flag = AV_RB32 (data);
- data += 4;
- mask = 0x80000000;
- }
-
- if (!(chunk_id & 0x01) || (flag & mask)) {
- int k, kk;
-
- if ((data + n) > eod)
- break;
-
- for (k = 0; k < 4; ++k) {
- int r = *data++;
- for (kk = 0; kk < 3; ++kk)
- *p++ = r;
- }
- if (n == 6) {
- int r, g, b, u, v;
- u = *(int8_t *)data++;
- v = *(int8_t *)data++;
- p -= 12;
- for(k=0; k<4; ++k) {
- r = *p++ + v*2;
- g = *p++ - (u/2) - v;
- b = *p + u*2;
- p -= 2;
- *p++ = av_clip_uint8(r);
- *p++ = av_clip_uint8(g);
- *p++ = av_clip_uint8(b);
- }
- }
- } else {
- p += 12;
- }
- }
-}
-
-static int cinepak_decode_vectors (CinepakContext *s, cvid_strip *strip,
- int chunk_id, int size, const uint8_t *data)
-{
- const uint8_t *eod = (data + size);
- uint32_t flag, mask;
- uint8_t *cb0, *cb1, *cb2, *cb3;
- unsigned int x, y;
- char *ip0, *ip1, *ip2, *ip3;
-
- flag = 0;
- mask = 0;
-
- for (y=strip->y1; y < strip->y2; y+=4) {
-
-/* take care of y dimension not being multiple of 4, such streams exist */
- ip0 = ip1 = ip2 = ip3 = s->frame->data[0] +
- (s->palette_video?strip->x1:strip->x1*3) + (y * s->frame->linesize[0]);
- if(s->avctx->height - y > 1) {
- ip1 = ip0 + s->frame->linesize[0];
- if(s->avctx->height - y > 2) {
- ip2 = ip1 + s->frame->linesize[0];
- if(s->avctx->height - y > 3) {
- ip3 = ip2 + s->frame->linesize[0];
- }
- }
- }
-/* to get the correct picture for not-multiple-of-4 cases let us fill
- * each block from the bottom up, thus possibly overwriting the top line
- * more than once but ending with the correct data in place
- * (instead of in-loop checking) */
-
- for (x=strip->x1; x < strip->x2; x+=4) {
- if ((chunk_id & 0x01) && !(mask >>= 1)) {
- if ((data + 4) > eod)
- return AVERROR_INVALIDDATA;
-
- flag = AV_RB32 (data);
- data += 4;
- mask = 0x80000000;
- }
-
- if (!(chunk_id & 0x01) || (flag & mask)) {
- if (!(chunk_id & 0x02) && !(mask >>= 1)) {
- if ((data + 4) > eod)
- return AVERROR_INVALIDDATA;
-
- flag = AV_RB32 (data);
- data += 4;
- mask = 0x80000000;
- }
-
- if ((chunk_id & 0x02) || (~flag & mask)) {
- uint8_t *p;
- if (data >= eod)
- return AVERROR_INVALIDDATA;
-
- p = strip->v1_codebook[*data++];
- if (s->palette_video) {
- ip3[0] = ip3[1] = ip2[0] = ip2[1] = p[6];
- ip3[2] = ip3[3] = ip2[2] = ip2[3] = p[9];
- ip1[0] = ip1[1] = ip0[0] = ip0[1] = p[0];
- ip1[2] = ip1[3] = ip0[2] = ip0[3] = p[3];
- } else {
- p += 6;
- memcpy(ip3 + 0, p, 3); memcpy(ip3 + 3, p, 3);
- memcpy(ip2 + 0, p, 3); memcpy(ip2 + 3, p, 3);
- p += 3; /* ... + 9 */
- memcpy(ip3 + 6, p, 3); memcpy(ip3 + 9, p, 3);
- memcpy(ip2 + 6, p, 3); memcpy(ip2 + 9, p, 3);
- p -= 9; /* ... + 0 */
- memcpy(ip1 + 0, p, 3); memcpy(ip1 + 3, p, 3);
- memcpy(ip0 + 0, p, 3); memcpy(ip0 + 3, p, 3);
- p += 3; /* ... + 3 */
- memcpy(ip1 + 6, p, 3); memcpy(ip1 + 9, p, 3);
- memcpy(ip0 + 6, p, 3); memcpy(ip0 + 9, p, 3);
- }
-
- } else if (flag & mask) {
- if ((data + 4) > eod)
- return AVERROR_INVALIDDATA;
-
- cb0 = strip->v4_codebook[*data++];
- cb1 = strip->v4_codebook[*data++];
- cb2 = strip->v4_codebook[*data++];
- cb3 = strip->v4_codebook[*data++];
- if (s->palette_video) {
- uint8_t *p;
- p = ip3;
- *p++ = cb2[6];
- *p++ = cb2[9];
- *p++ = cb3[6];
- *p = cb3[9];
- p = ip2;
- *p++ = cb2[0];
- *p++ = cb2[3];
- *p++ = cb3[0];
- *p = cb3[3];
- p = ip1;
- *p++ = cb0[6];
- *p++ = cb0[9];
- *p++ = cb1[6];
- *p = cb1[9];
- p = ip0;
- *p++ = cb0[0];
- *p++ = cb0[3];
- *p++ = cb1[0];
- *p = cb1[3];
- } else {
- memcpy(ip3 + 0, cb2 + 6, 6);
- memcpy(ip3 + 6, cb3 + 6, 6);
- memcpy(ip2 + 0, cb2 + 0, 6);
- memcpy(ip2 + 6, cb3 + 0, 6);
- memcpy(ip1 + 0, cb0 + 6, 6);
- memcpy(ip1 + 6, cb1 + 6, 6);
- memcpy(ip0 + 0, cb0 + 0, 6);
- memcpy(ip0 + 6, cb1 + 0, 6);
- }
-
- }
- }
-
- if (s->palette_video) {
- ip0 += 4; ip1 += 4;
- ip2 += 4; ip3 += 4;
- } else {
- ip0 += 12; ip1 += 12;
- ip2 += 12; ip3 += 12;
- }
- }
- }
-
- return 0;
-}
-
-static int cinepak_decode_strip (CinepakContext *s,
- cvid_strip *strip, const uint8_t *data, int size)
-{
- const uint8_t *eod = (data + size);
- int chunk_id, chunk_size;
-
- /* coordinate sanity checks */
- if (strip->x2 > s->width ||
- strip->y2 > s->height ||
- strip->x1 >= strip->x2 || strip->y1 >= strip->y2)
- return AVERROR_INVALIDDATA;
-
- while ((data + 4) <= eod) {
- chunk_id = data[0];
- chunk_size = AV_RB24 (&data[1]) - 4;
- if(chunk_size < 0)
- return AVERROR_INVALIDDATA;
-
- data += 4;
- chunk_size = ((data + chunk_size) > eod) ? (eod - data) : chunk_size;
-
- switch (chunk_id) {
-
- case 0x20:
- case 0x21:
- case 0x24:
- case 0x25:
- cinepak_decode_codebook (strip->v4_codebook, chunk_id,
- chunk_size, data);
- break;
-
- case 0x22:
- case 0x23:
- case 0x26:
- case 0x27:
- cinepak_decode_codebook (strip->v1_codebook, chunk_id,
- chunk_size, data);
- break;
-
- case 0x30:
- case 0x31:
- case 0x32:
- return cinepak_decode_vectors (s, strip, chunk_id,
- chunk_size, data);
- }
-
- data += chunk_size;
- }
-
- return AVERROR_INVALIDDATA;
-}
-
-static int cinepak_decode (CinepakContext *s)
-{
- const 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 AVERROR_INVALIDDATA;
-
- frame_flags = s->data[0];
- num_strips = AV_RB16 (&s->data[8]);
- encoded_buf_size = AV_RB24(&s->data[1]);
-
- /* if this is the first frame, check for deviant Sega FILM data */
- if (s->sega_film_skip_bytes == -1) {
- if (!encoded_buf_size) {
- avpriv_request_sample(s->avctx, "encoded_buf_size 0");
- return AVERROR_PATCHWELCOME;
- }
- if (encoded_buf_size != s->size && (s->size % encoded_buf_size) != 0) {
- /* 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. The container
- * size also cannot be a multiple of the encoded size. */
- if (s->size >= 16 &&
- (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;
-
- num_strips = FFMIN(num_strips, MAX_STRIPS);
-
- s->frame->key_frame = 0;
-
- for (i=0; i < num_strips; i++) {
- if ((s->data + 12) > eod)
- return AVERROR_INVALIDDATA;
-
- s->strips[i].id = s->data[0];
-/* zero y1 means "relative to the previous stripe" */
- if (!(s->strips[i].y1 = AV_RB16 (&s->data[4])))
- s->strips[i].y2 = (s->strips[i].y1 = y0) + AV_RB16 (&s->data[8]);
- else
- s->strips[i].y2 = AV_RB16 (&s->data[8]);
- s->strips[i].x1 = AV_RB16 (&s->data[6]);
- s->strips[i].x2 = AV_RB16 (&s->data[10]);
-
- if (s->strips[i].id == 0x10)
- s->frame->key_frame = 1;
-
- strip_size = AV_RB24 (&s->data[1]) - 12;
- if (strip_size < 0)
- return AVERROR_INVALIDDATA;
- 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 av_cold int cinepak_decode_init(AVCodecContext *avctx)
-{
- CinepakContext *s = 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->bits_per_coded_sample != 8) {
- s->palette_video = 0;
- avctx->pix_fmt = AV_PIX_FMT_RGB24;
- } else {
- s->palette_video = 1;
- avctx->pix_fmt = AV_PIX_FMT_PAL8;
- }
-
- s->frame = av_frame_alloc();
- if (!s->frame)
- return AVERROR(ENOMEM);
-
- return 0;
-}
-
-static int cinepak_decode_frame(AVCodecContext *avctx,
- void *data, int *got_frame,
- AVPacket *avpkt)
-{
- const uint8_t *buf = avpkt->data;
- int ret = 0, buf_size = avpkt->size;
- CinepakContext *s = avctx->priv_data;
-
- s->data = buf;
- s->size = buf_size;
-
- if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
- return ret;
-
- if (s->palette_video) {
- const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
- if (pal) {
- s->frame->palette_has_changed = 1;
- memcpy(s->pal, pal, AVPALETTE_SIZE);
- }
- }
-
- if ((ret = cinepak_decode(s)) < 0) {
- av_log(avctx, AV_LOG_ERROR, "cinepak_decode failed\n");
- }
-
- if (s->palette_video)
- memcpy (s->frame->data[1], s->pal, AVPALETTE_SIZE);
-
- if ((ret = av_frame_ref(data, s->frame)) < 0)
- return ret;
-
- *got_frame = 1;
-
- /* report that the buffer was completely consumed */
- return buf_size;
-}
-
-static av_cold int cinepak_decode_end(AVCodecContext *avctx)
-{
- CinepakContext *s = avctx->priv_data;
-
- av_frame_free(&s->frame);
-
- return 0;
-}
-
-AVCodec ff_cinepak_decoder = {
- .name = "cinepak",
- .long_name = NULL_IF_CONFIG_SMALL("Cinepak"),
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_CINEPAK,
- .priv_data_size = sizeof(CinepakContext),
- .init = cinepak_decode_init,
- .close = cinepak_decode_end,
- .decode = cinepak_decode_frame,
- .capabilities = CODEC_CAP_DR1,
-};
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