* Quicktime Video (RPZA) Video Decoder
* Copyright (C) 2003 the ffmpeg project
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file rpza.c
- * QT RPZA Video Decoder by Roberto Togni <rtogni@bresciaonline.it>
+ * @file
+ * QT RPZA Video Decoder by Roberto Togni
* For more information about the RPZA format, visit:
* http://www.pcisys.net/~melanson/codecs/
*
* Note that this decoder reads big endian RGB555 pixel values from the
* bytestream, arranges them in the host's endian order, and outputs
* them to the final rendered map in the same host endian order. This is
- * intended behavior as the ffmpeg documentation states that RGB555 pixels
- * shall be stored in native CPU endianness.
+ * intended behavior as the libavcodec documentation states that RGB555
+ * pixels shall be stored in native CPU endianness.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <unistd.h>
-#include "common.h"
+#include "libavutil/intreadwrite.h"
#include "avcodec.h"
-#include "dsputil.h"
typedef struct RpzaContext {
AVCodecContext *avctx;
- DSPContext dsp;
AVFrame frame;
- AVFrame prev_frame;
- unsigned char *buf;
+ const unsigned char *buf;
int size;
} RpzaContext;
-#define BE_16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
-#define BE_32(x) ((((uint8_t*)(x))[0] << 24) | \
- (((uint8_t*)(x))[1] << 16) | \
- (((uint8_t*)(x))[2] << 8) | \
- ((uint8_t*)(x))[3])
-
#define ADVANCE_BLOCK() \
{ \
pixel_ptr += 4; \
unsigned char index, idx;
unsigned short ta, tb;
unsigned short *pixels = (unsigned short *)s->frame.data[0];
- unsigned short *prev_pixels = (unsigned short *)s->prev_frame.data[0];
int row_ptr = 0;
int pixel_ptr = 0;
/* First byte is always 0xe1. Warn if it's different */
if (s->buf[stream_ptr] != 0xe1)
- av_log(s->avctx, AV_LOG_ERROR, "First chunk byte is 0x%02x instead of 0x1e\n",
+ av_log(s->avctx, AV_LOG_ERROR, "First chunk byte is 0x%02x instead of 0xe1\n",
s->buf[stream_ptr]);
/* Get chunk size, ingnoring first byte */
- chunk_size = BE_32(&s->buf[stream_ptr]) & 0x00FFFFFF;
+ chunk_size = AV_RB32(&s->buf[stream_ptr]) & 0x00FFFFFF;
stream_ptr += 4;
/* If length mismatch use size from MOV file and try to decode anyway */
chunk_size = s->size;
/* Number of 4x4 blocks in frame. */
- total_blocks = (s->avctx->width * s->avctx->height) / (4 * 4);
+ total_blocks = ((s->avctx->width + 3) / 4) * ((s->avctx->height + 3) / 4);
/* Process chunk data */
while (stream_ptr < chunk_size) {
colorA = (opcode << 8) | (s->buf[stream_ptr++]);
opcode = 0;
if ((s->buf[stream_ptr] & 0x80) != 0) {
- /* Must behave as opcode 110xxxxx, using colorA computed
- * above. Use fake opcode 0x20 to enter switch block at
+ /* Must behave as opcode 110xxxxx, using colorA computed
+ * above. Use fake opcode 0x20 to enter switch block at
* the right place */
opcode = 0x20;
n_blocks = 1;
/* Skip blocks */
case 0x80:
while (n_blocks--) {
- if (!s->avctx->cr_available) {
- block_ptr = row_ptr + pixel_ptr;
- for (pixel_y = 0; pixel_y < 4; pixel_y++) {
- for (pixel_x = 0; pixel_x < 4; pixel_x++){
- pixels[block_ptr] = prev_pixels[block_ptr];
- block_ptr++;
- }
- block_ptr += row_inc;
- }
- }
ADVANCE_BLOCK();
}
break;
/* Fill blocks with one color */
case 0xa0:
- colorA = BE_16 (&s->buf[stream_ptr]);
+ colorA = AV_RB16 (&s->buf[stream_ptr]);
stream_ptr += 2;
while (n_blocks--) {
block_ptr = row_ptr + pixel_ptr;
/* Fill blocks with 4 colors */
case 0xc0:
- colorA = BE_16 (&s->buf[stream_ptr]);
+ colorA = AV_RB16 (&s->buf[stream_ptr]);
stream_ptr += 2;
case 0x20:
- colorB = BE_16 (&s->buf[stream_ptr]);
+ colorB = AV_RB16 (&s->buf[stream_ptr]);
stream_ptr += 2;
/* sort out the colors */
color4[1] |= ((11 * ta + 21 * tb) >> 5);
color4[2] |= ((21 * ta + 11 * tb) >> 5);
+ if (s->size - stream_ptr < n_blocks * 4)
+ return;
while (n_blocks--) {
block_ptr = row_ptr + pixel_ptr;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
/* Fill block with 16 colors */
case 0x00:
+ if (s->size - stream_ptr < 16)
+ return;
block_ptr = row_ptr + pixel_ptr;
for (pixel_y = 0; pixel_y < 4; pixel_y++) {
for (pixel_x = 0; pixel_x < 4; pixel_x++){
/* We already have color of upper left pixel */
if ((pixel_y != 0) || (pixel_x !=0)) {
- colorA = BE_16 (&s->buf[stream_ptr]);
+ colorA = AV_RB16 (&s->buf[stream_ptr]);
stream_ptr += 2;
}
pixels[block_ptr] = colorA;
}
}
-static int rpza_decode_init(AVCodecContext *avctx)
+static av_cold int rpza_decode_init(AVCodecContext *avctx)
{
- RpzaContext *s = (RpzaContext *)avctx->priv_data;
+ RpzaContext *s = avctx->priv_data;
s->avctx = avctx;
avctx->pix_fmt = PIX_FMT_RGB555;
- avctx->has_b_frames = 0;
- dsputil_init(&s->dsp, avctx);
- s->frame.data[0] = s->prev_frame.data[0] = NULL;
+ s->frame.data[0] = NULL;
return 0;
}
static int rpza_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- uint8_t *buf, int buf_size)
+ AVPacket *avpkt)
{
- RpzaContext *s = (RpzaContext *)avctx->priv_data;
-
- /* no supplementary picture */
- if (buf_size == 0)
- return 0;
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+ RpzaContext *s = avctx->priv_data;
s->buf = buf;
s->size = buf_size;
s->frame.reference = 1;
- s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE;
- if (avctx->cr_available)
- s->frame.buffer_hints |= FF_BUFFER_HINTS_REUSABLE;
- else
- s->frame.buffer_hints |= FF_BUFFER_HINTS_READABLE;
- if (avctx->get_buffer(avctx, &s->frame)) {
- av_log(avctx, AV_LOG_ERROR, " RPZA Video: get_buffer() failed\n");
+ 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;
}
- if (s->prev_frame.data[0] &&(s->frame.linesize[0] != s->prev_frame.linesize[0]))
- av_log(avctx, AV_LOG_ERROR, "Buffer linesize changed: current %u, previous %u.\n"
- "Expect wrong image and/or crash!\n",
- s->frame.linesize[0], s->prev_frame.linesize[0]);
-
rpza_decode_stream(s);
- if (s->prev_frame.data[0])
- avctx->release_buffer(avctx, &s->prev_frame);
-
- /* shuffle frames */
- if (!avctx->cr_available)
- s->prev_frame = s->frame;
-
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->frame;
return buf_size;
}
-static int rpza_decode_end(AVCodecContext *avctx)
+static av_cold int rpza_decode_end(AVCodecContext *avctx)
{
- RpzaContext *s = (RpzaContext *)avctx->priv_data;
+ RpzaContext *s = avctx->priv_data;
- if (s->prev_frame.data[0])
- avctx->release_buffer(avctx, &s->prev_frame);
+ if (s->frame.data[0])
+ avctx->release_buffer(avctx, &s->frame);
return 0;
}
-AVCodec rpza_decoder = {
- "rpza",
- CODEC_TYPE_VIDEO,
- CODEC_ID_RPZA,
- sizeof(RpzaContext),
- rpza_decode_init,
- NULL,
- rpza_decode_end,
- rpza_decode_frame,
- CODEC_CAP_DR1 | CODEC_CAP_CR,
+AVCodec ff_rpza_decoder = {
+ .name = "rpza",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_RPZA,
+ .priv_data_size = sizeof(RpzaContext),
+ .init = rpza_decode_init,
+ .close = rpza_decode_end,
+ .decode = rpza_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("QuickTime video (RPZA)"),
};
projects / ffmpeg / blobdiff