* Quicktime Planar RGB (8BPS) Video Decoder
* Copyright (C) 2003 Roberto Togni
*
- * 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 libavcodec/8bps.c
+ * @file
* QT 8BPS Video Decoder by Roberto Togni
* For more information about the 8BPS format, visit:
* http://www.pcisys.net/~melanson/codecs/
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
+#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
-static const enum PixelFormat pixfmt_rgb24[] = {PIX_FMT_BGR24, PIX_FMT_RGB32, PIX_FMT_NONE};
+static const enum AVPixelFormat pixfmt_rgb24[] = {
+ AV_PIX_FMT_BGR24, AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE };
/*
* Decoder context
*/
typedef struct EightBpsContext {
+ AVCodecContext *avctx;
+ AVFrame pic;
- AVCodecContext *avctx;
- AVFrame pic;
+ unsigned char planes;
+ unsigned char planemap[4];
- unsigned char planes;
- unsigned char planemap[4];
+ uint32_t pal[256];
} EightBpsContext;
* Decode a frame
*
*/
-static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
+static int decode_frame(AVCodecContext *avctx, void *data,
+ int *data_size, AVPacket *avpkt)
{
- const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- EightBpsContext * const c = avctx->priv_data;
- const unsigned char *encoded = buf;
- unsigned char *pixptr, *pixptr_end;
- unsigned int height = avctx->height; // Real image height
- unsigned int dlen, p, row;
- const unsigned char *lp, *dp;
- unsigned char count;
- unsigned int px_inc;
- unsigned int planes = c->planes;
- unsigned char *planemap = c->planemap;
-
- if(c->pic.data[0])
- avctx->release_buffer(avctx, &c->pic);
-
- c->pic.reference = 0;
- c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
- if(avctx->get_buffer(avctx, &c->pic) < 0){
- av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
- return -1;
- }
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ EightBpsContext * const c = avctx->priv_data;
+ const unsigned char *encoded = buf;
+ unsigned char *pixptr, *pixptr_end;
+ unsigned int height = avctx->height; // Real image height
+ unsigned int dlen, p, row;
+ const unsigned char *lp, *dp;
+ unsigned char count;
+ unsigned int px_inc;
+ unsigned int planes = c->planes;
+ unsigned char *planemap = c->planemap;
+
+ if (c->pic.data[0])
+ avctx->release_buffer(avctx, &c->pic);
+
+ c->pic.reference = 0;
+ c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
+ if (avctx->get_buffer(avctx, &c->pic) < 0){
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return -1;
+ }
- /* Set data pointer after line lengths */
- dp = encoded + planes * (height << 1);
-
- /* Ignore alpha plane, don't know what to do with it */
- if (planes == 4)
- planes--;
-
- px_inc = planes + (avctx->pix_fmt == PIX_FMT_RGB32);
-
- for (p = 0; p < planes; p++) {
- /* Lines length pointer for this plane */
- lp = encoded + p * (height << 1);
-
- /* Decode a plane */
- for(row = 0; row < height; row++) {
- pixptr = c->pic.data[0] + row * c->pic.linesize[0] + planemap[p];
- pixptr_end = pixptr + c->pic.linesize[0];
- dlen = be2me_16(*(const unsigned short *)(lp+row*2));
- /* Decode a row of this plane */
- while(dlen > 0) {
- if(dp + 1 >= buf+buf_size) return -1;
- if ((count = *dp++) <= 127) {
- count++;
- dlen -= count + 1;
- if (pixptr + count * px_inc > pixptr_end)
- break;
- if(dp + count > buf+buf_size) return -1;
- while(count--) {
- *pixptr = *dp++;
- pixptr += px_inc;
- }
- } else {
- count = 257 - count;
- if (pixptr + count * px_inc > pixptr_end)
- break;
- while(count--) {
- *pixptr = *dp;
- pixptr += px_inc;
- }
- dp++;
- dlen -= 2;
- }
- }
+ /* Set data pointer after line lengths */
+ dp = encoded + planes * (height << 1);
+
+ /* Ignore alpha plane, don't know what to do with it */
+ if (planes == 4)
+ planes--;
+
+ px_inc = planes + (avctx->pix_fmt == AV_PIX_FMT_RGB32);
+
+ for (p = 0; p < planes; p++) {
+ /* Lines length pointer for this plane */
+ lp = encoded + p * (height << 1);
+
+ /* Decode a plane */
+ for (row = 0; row < height; row++) {
+ pixptr = c->pic.data[0] + row * c->pic.linesize[0] + planemap[p];
+ pixptr_end = pixptr + c->pic.linesize[0];
+ dlen = av_be2ne16(*(const unsigned short *)(lp + row * 2));
+ /* Decode a row of this plane */
+ while (dlen > 0) {
+ if (dp + 1 >= buf + buf_size)
+ return -1;
+ if ((count = *dp++) <= 127) {
+ count++;
+ dlen -= count + 1;
+ if (pixptr + count * px_inc > pixptr_end)
+ break;
+ if (dp + count > buf + buf_size)
+ return -1;
+ while (count--) {
+ *pixptr = *dp++;
+ pixptr += px_inc;
+ }
+ } else {
+ count = 257 - count;
+ if (pixptr + count * px_inc > pixptr_end)
+ break;
+ while (count--) {
+ *pixptr = *dp;
+ pixptr += px_inc;
+ }
+ dp++;
+ dlen -= 2;
}
+ }
}
+ }
- if (avctx->palctrl) {
- memcpy (c->pic.data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
- if (avctx->palctrl->palette_changed) {
- c->pic.palette_has_changed = 1;
- avctx->palctrl->palette_changed = 0;
- } else
- c->pic.palette_has_changed = 0;
+ if (avctx->bits_per_coded_sample <= 8) {
+ const uint8_t *pal = av_packet_get_side_data(avpkt,
+ AV_PKT_DATA_PALETTE,
+ NULL);
+ if (pal) {
+ c->pic.palette_has_changed = 1;
+ memcpy(c->pal, pal, AVPALETTE_SIZE);
}
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = c->pic;
+ memcpy (c->pic.data[1], c->pal, AVPALETTE_SIZE);
+ }
+
+ *data_size = sizeof(AVFrame);
+ *(AVFrame*)data = c->pic;
- /* always report that the buffer was completely consumed */
- return buf_size;
+ /* always report that the buffer was completely consumed */
+ return buf_size;
}
*/
static av_cold int decode_init(AVCodecContext *avctx)
{
- EightBpsContext * const c = avctx->priv_data;
-
- c->avctx = avctx;
-
- c->pic.data[0] = NULL;
-
- if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
- return 1;
- }
-
- switch (avctx->bits_per_coded_sample) {
- case 8:
- avctx->pix_fmt = PIX_FMT_PAL8;
- c->planes = 1;
- c->planemap[0] = 0; // 1st plane is palette indexes
- if (avctx->palctrl == NULL) {
- av_log(avctx, AV_LOG_ERROR, "Error: PAL8 format but no palette from demuxer.\n");
- return -1;
- }
- break;
- case 24:
- avctx->pix_fmt = avctx->get_format(avctx, pixfmt_rgb24);
- c->planes = 3;
- c->planemap[0] = 2; // 1st plane is red
- c->planemap[1] = 1; // 2nd plane is green
- c->planemap[2] = 0; // 3rd plane is blue
- break;
- case 32:
- avctx->pix_fmt = PIX_FMT_RGB32;
- c->planes = 4;
-#ifdef WORDS_BIGENDIAN
- c->planemap[0] = 1; // 1st plane is red
- c->planemap[1] = 2; // 2nd plane is green
- c->planemap[2] = 3; // 3rd plane is blue
- c->planemap[3] = 0; // 4th plane is alpha???
+ EightBpsContext * const c = avctx->priv_data;
+
+ c->avctx = avctx;
+ c->pic.data[0] = NULL;
+
+ switch (avctx->bits_per_coded_sample) {
+ case 8:
+ avctx->pix_fmt = AV_PIX_FMT_PAL8;
+ c->planes = 1;
+ c->planemap[0] = 0; // 1st plane is palette indexes
+ break;
+ case 24:
+ avctx->pix_fmt = avctx->get_format(avctx, pixfmt_rgb24);
+ c->planes = 3;
+ c->planemap[0] = 2; // 1st plane is red
+ c->planemap[1] = 1; // 2nd plane is green
+ c->planemap[2] = 0; // 3rd plane is blue
+ break;
+ case 32:
+ avctx->pix_fmt = AV_PIX_FMT_RGB32;
+ c->planes = 4;
+#if HAVE_BIGENDIAN
+ c->planemap[0] = 1; // 1st plane is red
+ c->planemap[1] = 2; // 2nd plane is green
+ c->planemap[2] = 3; // 3rd plane is blue
+ c->planemap[3] = 0; // 4th plane is alpha???
#else
- c->planemap[0] = 2; // 1st plane is red
- c->planemap[1] = 1; // 2nd plane is green
- c->planemap[2] = 0; // 3rd plane is blue
- c->planemap[3] = 3; // 4th plane is alpha???
+ c->planemap[0] = 2; // 1st plane is red
+ c->planemap[1] = 1; // 2nd plane is green
+ c->planemap[2] = 0; // 3rd plane is blue
+ c->planemap[3] = 3; // 4th plane is alpha???
#endif
- break;
- default:
- av_log(avctx, AV_LOG_ERROR, "Error: Unsupported color depth: %u.\n", avctx->bits_per_coded_sample);
- return -1;
- }
+ break;
+ default:
+ av_log(avctx, AV_LOG_ERROR, "Error: Unsupported color depth: %u.\n",
+ avctx->bits_per_coded_sample);
+ return -1;
+ }
- return 0;
+ return 0;
}
*/
static av_cold int decode_end(AVCodecContext *avctx)
{
- EightBpsContext * const c = avctx->priv_data;
+ EightBpsContext * const c = avctx->priv_data;
- if (c->pic.data[0])
- avctx->release_buffer(avctx, &c->pic);
+ if (c->pic.data[0])
+ avctx->release_buffer(avctx, &c->pic);
- return 0;
+ return 0;
}
-AVCodec eightbps_decoder = {
- "8bps",
- CODEC_TYPE_VIDEO,
- CODEC_ID_8BPS,
- sizeof(EightBpsContext),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("QuickTime 8BPS video"),
+AVCodec ff_eightbps_decoder = {
+ .name = "8bps",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_8BPS,
+ .priv_data_size = sizeof(EightBpsContext),
+ .init = decode_init,
+ .close = decode_end,
+ .decode = decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("QuickTime 8BPS video"),
};
projects / ffmpeg / blobdiff