* Quicktime Animation (RLE) Video Decoder
* Copyright (C) 2004 the ffmpeg project
*
- * 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 qtrle.c
+ * @file
* QT RLE Video Decoder by Mike Melanson (melanson@pcisys.net)
* For more information about the QT RLE format, visit:
* http://www.pcisys.net/~melanson/codecs/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <unistd.h>
+#include "libavutil/intreadwrite.h"
#include "avcodec.h"
-#include "dsputil.h"
typedef struct QtrleContext {
AVCodecContext *avctx;
- DSPContext dsp;
AVFrame frame;
const unsigned char *buf;
int size;
+ uint32_t pal[256];
} QtrleContext;
#define CHECK_STREAM_PTR(n) \
return; \
} \
-static void qtrle_decode_1bpp(QtrleContext *s)
+static void qtrle_decode_1bpp(QtrleContext *s, int stream_ptr, int row_ptr, int lines_to_change)
{
-}
+ int rle_code;
+ int pixel_ptr = 0;
+ int row_inc = s->frame.linesize[0];
+ unsigned char pi0, pi1; /* 2 8-pixel values */
+ unsigned char *rgb = s->frame.data[0];
+ int pixel_limit = s->frame.linesize[0] * s->avctx->height;
+ int skip;
-static void qtrle_decode_2bpp(QtrleContext *s)
-{
+ while (lines_to_change) {
+ CHECK_STREAM_PTR(2);
+ skip = s->buf[stream_ptr++];
+ rle_code = (signed char)s->buf[stream_ptr++];
+ if (rle_code == 0)
+ break;
+ if(skip & 0x80) {
+ lines_to_change--;
+ row_ptr += row_inc;
+ pixel_ptr = row_ptr + 2 * (skip & 0x7f);
+ } else
+ pixel_ptr += 2 * skip;
+ CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
+
+ if (rle_code < 0) {
+ /* decode the run length code */
+ rle_code = -rle_code;
+ /* get the next 2 bytes from the stream, treat them as groups
+ * of 8 pixels, and output them rle_code times */
+ CHECK_STREAM_PTR(2);
+ pi0 = s->buf[stream_ptr++];
+ pi1 = s->buf[stream_ptr++];
+ CHECK_PIXEL_PTR(rle_code * 2);
+
+ while (rle_code--) {
+ rgb[pixel_ptr++] = pi0;
+ rgb[pixel_ptr++] = pi1;
+ }
+ } else {
+ /* copy the same pixel directly to output 2 times */
+ rle_code *= 2;
+ CHECK_STREAM_PTR(rle_code);
+ CHECK_PIXEL_PTR(rle_code);
+
+ while (rle_code--)
+ rgb[pixel_ptr++] = s->buf[stream_ptr++];
+ }
+ }
}
-static void qtrle_decode_4bpp(QtrleContext *s)
+static inline void qtrle_decode_2n4bpp(QtrleContext *s, int stream_ptr,
+ int row_ptr, int lines_to_change, int bpp)
{
- int stream_ptr;
- int header;
- int start_line;
- int lines_to_change;
- int rle_code;
- int row_ptr, pixel_ptr;
+ int rle_code, i;
+ int pixel_ptr;
int row_inc = s->frame.linesize[0];
- unsigned char pi1, pi2, pi3, pi4, pi5, pi6, pi7, pi8; /* 8 palette indices */
+ unsigned char pi[16]; /* 16 palette indices */
unsigned char *rgb = s->frame.data[0];
int pixel_limit = s->frame.linesize[0] * s->avctx->height;
+ int num_pixels = (bpp == 4) ? 8 : 16;
- /* check if this frame is even supposed to change */
- if (s->size < 8)
- return;
-
- /* start after the chunk size */
- stream_ptr = 4;
-
- /* fetch the header */
- CHECK_STREAM_PTR(2);
- header = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 2;
-
- /* if a header is present, fetch additional decoding parameters */
- if (header & 0x0008) {
- CHECK_STREAM_PTR(8);
- start_line = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 4;
- lines_to_change = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 4;
- } else {
- start_line = 0;
- lines_to_change = s->avctx->height;
- }
-
- row_ptr = row_inc * start_line;
while (lines_to_change--) {
CHECK_STREAM_PTR(2);
- pixel_ptr = row_ptr + (8 * (s->buf[stream_ptr++] - 1));
+ pixel_ptr = row_ptr + (num_pixels * (s->buf[stream_ptr++] - 1));
while ((rle_code = (signed char)s->buf[stream_ptr++]) != -1) {
if (rle_code == 0) {
/* there's another skip code in the stream */
CHECK_STREAM_PTR(1);
- pixel_ptr += (8 * (s->buf[stream_ptr++] - 1));
+ pixel_ptr += (num_pixels * (s->buf[stream_ptr++] - 1));
CHECK_PIXEL_PTR(0); /* make sure pixel_ptr is positive */
} else if (rle_code < 0) {
/* decode the run length code */
rle_code = -rle_code;
/* get the next 4 bytes from the stream, treat them as palette
- * indices, and output them rle_code times */
+ * indexes, and output them rle_code times */
CHECK_STREAM_PTR(4);
- pi1 = ((s->buf[stream_ptr]) >> 4) & 0x0f;
- pi2 = (s->buf[stream_ptr++]) & 0x0f;
- pi3 = ((s->buf[stream_ptr]) >> 4) & 0x0f;
- pi4 = (s->buf[stream_ptr++]) & 0x0f;
- pi5 = ((s->buf[stream_ptr]) >> 4) & 0x0f;
- pi6 = (s->buf[stream_ptr++]) & 0x0f;
- pi7 = ((s->buf[stream_ptr]) >> 4) & 0x0f;
- pi8 = (s->buf[stream_ptr++]) & 0x0f;
-
- CHECK_PIXEL_PTR(rle_code * 8);
-
+ for (i = num_pixels-1; i >= 0; i--) {
+ pi[num_pixels-1-i] = (s->buf[stream_ptr] >> ((i*bpp) & 0x07)) & ((1<<bpp)-1);
+ stream_ptr+= ((i & ((num_pixels>>2)-1)) == 0);
+ }
+ CHECK_PIXEL_PTR(rle_code * num_pixels);
while (rle_code--) {
- rgb[pixel_ptr++] = pi1;
- rgb[pixel_ptr++] = pi2;
- rgb[pixel_ptr++] = pi3;
- rgb[pixel_ptr++] = pi4;
- rgb[pixel_ptr++] = pi5;
- rgb[pixel_ptr++] = pi6;
- rgb[pixel_ptr++] = pi7;
- rgb[pixel_ptr++] = pi8;
+ for (i = 0; i < num_pixels; i++)
+ rgb[pixel_ptr++] = pi[i];
}
} else {
/* copy the same pixel directly to output 4 times */
rle_code *= 4;
CHECK_STREAM_PTR(rle_code);
- CHECK_PIXEL_PTR(rle_code*2);
-
+ CHECK_PIXEL_PTR(rle_code*(num_pixels>>2));
while (rle_code--) {
- rgb[pixel_ptr++] = ((s->buf[stream_ptr]) >> 4) & 0x0f;
- rgb[pixel_ptr++] = (s->buf[stream_ptr++]) & 0x0f;
+ if(bpp == 4) {
+ rgb[pixel_ptr++] = ((s->buf[stream_ptr]) >> 4) & 0x0f;
+ rgb[pixel_ptr++] = (s->buf[stream_ptr++]) & 0x0f;
+ } else {
+ rgb[pixel_ptr++] = ((s->buf[stream_ptr]) >> 6) & 0x03;
+ rgb[pixel_ptr++] = ((s->buf[stream_ptr]) >> 4) & 0x03;
+ rgb[pixel_ptr++] = ((s->buf[stream_ptr]) >> 2) & 0x03;
+ rgb[pixel_ptr++] = (s->buf[stream_ptr++]) & 0x03;
+ }
}
}
}
}
}
-static void qtrle_decode_8bpp(QtrleContext *s)
+static void qtrle_decode_8bpp(QtrleContext *s, int stream_ptr, int row_ptr, int lines_to_change)
{
- int stream_ptr;
- int header;
- int start_line;
- int lines_to_change;
int rle_code;
- int row_ptr, pixel_ptr;
+ int pixel_ptr;
int row_inc = s->frame.linesize[0];
- unsigned char pi1, pi2, pi3, pi4; /* 4 palette indices */
+ unsigned char pi1, pi2, pi3, pi4; /* 4 palette indexes */
unsigned char *rgb = s->frame.data[0];
int pixel_limit = s->frame.linesize[0] * s->avctx->height;
- /* check if this frame is even supposed to change */
- if (s->size < 8)
- return;
-
- /* start after the chunk size */
- stream_ptr = 4;
-
- /* fetch the header */
- CHECK_STREAM_PTR(2);
- header = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 2;
-
- /* if a header is present, fetch additional decoding parameters */
- if (header & 0x0008) {
- CHECK_STREAM_PTR(8);
- start_line = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 4;
- lines_to_change = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 4;
- } else {
- start_line = 0;
- lines_to_change = s->avctx->height;
- }
-
- row_ptr = row_inc * start_line;
while (lines_to_change--) {
CHECK_STREAM_PTR(2);
pixel_ptr = row_ptr + (4 * (s->buf[stream_ptr++] - 1));
/* decode the run length code */
rle_code = -rle_code;
/* get the next 4 bytes from the stream, treat them as palette
- * indices, and output them rle_code times */
+ * indexes, and output them rle_code times */
CHECK_STREAM_PTR(4);
pi1 = s->buf[stream_ptr++];
pi2 = s->buf[stream_ptr++];
}
}
-static void qtrle_decode_16bpp(QtrleContext *s)
+static void qtrle_decode_16bpp(QtrleContext *s, int stream_ptr, int row_ptr, int lines_to_change)
{
- int stream_ptr;
- int header;
- int start_line;
- int lines_to_change;
int rle_code;
- int row_ptr, pixel_ptr;
+ int pixel_ptr;
int row_inc = s->frame.linesize[0];
unsigned short rgb16;
unsigned char *rgb = s->frame.data[0];
int pixel_limit = s->frame.linesize[0] * s->avctx->height;
- /* check if this frame is even supposed to change */
- if (s->size < 8)
- return;
-
- /* start after the chunk size */
- stream_ptr = 4;
-
- /* fetch the header */
- CHECK_STREAM_PTR(2);
- header = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 2;
-
- /* if a header is present, fetch additional decoding parameters */
- if (header & 0x0008) {
- CHECK_STREAM_PTR(8);
- start_line = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 4;
- lines_to_change = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 4;
- } else {
- start_line = 0;
- lines_to_change = s->avctx->height;
- }
-
- row_ptr = row_inc * start_line;
while (lines_to_change--) {
CHECK_STREAM_PTR(2);
pixel_ptr = row_ptr + (s->buf[stream_ptr++] - 1) * 2;
}
}
-static void qtrle_decode_24bpp(QtrleContext *s)
+static void qtrle_decode_24bpp(QtrleContext *s, int stream_ptr, int row_ptr, int lines_to_change)
{
- int stream_ptr;
- int header;
- int start_line;
- int lines_to_change;
int rle_code;
- int row_ptr, pixel_ptr;
+ int pixel_ptr;
int row_inc = s->frame.linesize[0];
unsigned char r, g, b;
unsigned char *rgb = s->frame.data[0];
int pixel_limit = s->frame.linesize[0] * s->avctx->height;
- /* check if this frame is even supposed to change */
- if (s->size < 8)
- return;
-
- /* start after the chunk size */
- stream_ptr = 4;
-
- /* fetch the header */
- CHECK_STREAM_PTR(2);
- header = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 2;
-
- /* if a header is present, fetch additional decoding parameters */
- if (header & 0x0008) {
- CHECK_STREAM_PTR(8);
- start_line = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 4;
- lines_to_change = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 4;
- } else {
- start_line = 0;
- lines_to_change = s->avctx->height;
- }
-
- row_ptr = row_inc * start_line;
while (lines_to_change--) {
CHECK_STREAM_PTR(2);
pixel_ptr = row_ptr + (s->buf[stream_ptr++] - 1) * 3;
}
}
-static void qtrle_decode_32bpp(QtrleContext *s)
+static void qtrle_decode_32bpp(QtrleContext *s, int stream_ptr, int row_ptr, int lines_to_change)
{
- int stream_ptr;
- int header;
- int start_line;
- int lines_to_change;
int rle_code;
- int row_ptr, pixel_ptr;
+ int pixel_ptr;
int row_inc = s->frame.linesize[0];
- unsigned char a, r, g, b;
unsigned int argb;
unsigned char *rgb = s->frame.data[0];
int pixel_limit = s->frame.linesize[0] * s->avctx->height;
- /* check if this frame is even supposed to change */
- if (s->size < 8)
- return;
-
- /* start after the chunk size */
- stream_ptr = 4;
-
- /* fetch the header */
- CHECK_STREAM_PTR(2);
- header = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 2;
-
- /* if a header is present, fetch additional decoding parameters */
- if (header & 0x0008) {
- CHECK_STREAM_PTR(8);
- start_line = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 4;
- lines_to_change = AV_RB16(&s->buf[stream_ptr]);
- stream_ptr += 4;
- } else {
- start_line = 0;
- lines_to_change = s->avctx->height;
- }
-
- row_ptr = row_inc * start_line;
while (lines_to_change--) {
CHECK_STREAM_PTR(2);
pixel_ptr = row_ptr + (s->buf[stream_ptr++] - 1) * 4;
/* decode the run length code */
rle_code = -rle_code;
CHECK_STREAM_PTR(4);
- a = s->buf[stream_ptr++];
- r = s->buf[stream_ptr++];
- g = s->buf[stream_ptr++];
- b = s->buf[stream_ptr++];
- argb = (a << 24) | (r << 16) | (g << 8) | (b << 0);
+ argb = AV_RB32(s->buf + stream_ptr);
+ stream_ptr += 4;
CHECK_PIXEL_PTR(rle_code * 4);
while (rle_code--) {
- *(unsigned int *)(&rgb[pixel_ptr]) = argb;
+ AV_WN32A(rgb + pixel_ptr, argb);
pixel_ptr += 4;
}
} else {
/* copy pixels directly to output */
while (rle_code--) {
- a = s->buf[stream_ptr++];
- r = s->buf[stream_ptr++];
- g = s->buf[stream_ptr++];
- b = s->buf[stream_ptr++];
- argb = (a << 24) | (r << 16) | (g << 8) | (b << 0);
- *(unsigned int *)(&rgb[pixel_ptr]) = argb;
- pixel_ptr += 4;
+ argb = AV_RB32(s->buf + stream_ptr);
+ AV_WN32A(rgb + pixel_ptr, argb);
+ stream_ptr += 4;
+ pixel_ptr += 4;
}
}
}
}
}
-static int qtrle_decode_init(AVCodecContext *avctx)
+static av_cold int qtrle_decode_init(AVCodecContext *avctx)
{
QtrleContext *s = avctx->priv_data;
s->avctx = avctx;
- switch (avctx->bits_per_sample) {
+ switch (avctx->bits_per_coded_sample) {
case 1:
+ case 33:
+ avctx->pix_fmt = PIX_FMT_MONOWHITE;
+ break;
+
case 2:
case 4:
case 8:
- case 33:
case 34:
case 36:
case 40:
default:
av_log (avctx, AV_LOG_ERROR, "Unsupported colorspace: %d bits/sample?\n",
- avctx->bits_per_sample);
+ avctx->bits_per_coded_sample);
break;
}
- dsputil_init(&s->dsp, avctx);
s->frame.data[0] = NULL;
static int qtrle_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;
QtrleContext *s = avctx->priv_data;
+ int header, start_line;
+ int stream_ptr, height, row_ptr;
+ int has_palette = 0;
s->buf = buf;
s->size = buf_size;
return -1;
}
- switch (avctx->bits_per_sample) {
+ /* check if this frame is even supposed to change */
+ if (s->size < 8)
+ goto done;
+
+ /* start after the chunk size */
+ stream_ptr = 4;
+
+ /* fetch the header */
+ header = AV_RB16(&s->buf[stream_ptr]);
+ stream_ptr += 2;
+
+ /* if a header is present, fetch additional decoding parameters */
+ if (header & 0x0008) {
+ if(s->size < 14)
+ goto done;
+ start_line = AV_RB16(&s->buf[stream_ptr]);
+ stream_ptr += 4;
+ height = AV_RB16(&s->buf[stream_ptr]);
+ stream_ptr += 4;
+ } else {
+ start_line = 0;
+ height = s->avctx->height;
+ }
+ row_ptr = s->frame.linesize[0] * start_line;
+
+ switch (avctx->bits_per_coded_sample) {
case 1:
case 33:
- qtrle_decode_1bpp(s);
+ qtrle_decode_1bpp(s, stream_ptr, row_ptr, height);
break;
case 2:
case 34:
- qtrle_decode_2bpp(s);
+ qtrle_decode_2n4bpp(s, stream_ptr, row_ptr, height, 2);
+ has_palette = 1;
break;
case 4:
case 36:
- qtrle_decode_4bpp(s);
- /* make the palette available on the way out */
- memcpy(s->frame.data[1], s->avctx->palctrl->palette, AVPALETTE_SIZE);
- if (s->avctx->palctrl->palette_changed) {
- s->frame.palette_has_changed = 1;
- s->avctx->palctrl->palette_changed = 0;
- }
+ qtrle_decode_2n4bpp(s, stream_ptr, row_ptr, height, 4);
+ has_palette = 1;
break;
case 8:
case 40:
- qtrle_decode_8bpp(s);
- /* make the palette available on the way out */
- memcpy(s->frame.data[1], s->avctx->palctrl->palette, AVPALETTE_SIZE);
- if (s->avctx->palctrl->palette_changed) {
- s->frame.palette_has_changed = 1;
- s->avctx->palctrl->palette_changed = 0;
- }
+ qtrle_decode_8bpp(s, stream_ptr, row_ptr, height);
+ has_palette = 1;
break;
case 16:
- qtrle_decode_16bpp(s);
+ qtrle_decode_16bpp(s, stream_ptr, row_ptr, height);
break;
case 24:
- qtrle_decode_24bpp(s);
+ qtrle_decode_24bpp(s, stream_ptr, row_ptr, height);
break;
case 32:
- qtrle_decode_32bpp(s);
+ qtrle_decode_32bpp(s, stream_ptr, row_ptr, height);
break;
default:
av_log (s->avctx, AV_LOG_ERROR, "Unsupported colorspace: %d bits/sample?\n",
- avctx->bits_per_sample);
+ avctx->bits_per_coded_sample);
break;
}
+ if(has_palette) {
+ 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);
+ }
+
+ /* make the palette available on the way out */
+ memcpy(s->frame.data[1], s->pal, AVPALETTE_SIZE);
+ }
+
+done:
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->frame;
return buf_size;
}
-static int qtrle_decode_end(AVCodecContext *avctx)
+static av_cold int qtrle_decode_end(AVCodecContext *avctx)
{
QtrleContext *s = avctx->priv_data;
return 0;
}
-AVCodec qtrle_decoder = {
- "qtrle",
- CODEC_TYPE_VIDEO,
- CODEC_ID_QTRLE,
- sizeof(QtrleContext),
- qtrle_decode_init,
- NULL,
- qtrle_decode_end,
- qtrle_decode_frame,
- CODEC_CAP_DR1,
+AVCodec ff_qtrle_decoder = {
+ .name = "qtrle",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_QTRLE,
+ .priv_data_size = sizeof(QtrleContext),
+ .init = qtrle_decode_init,
+ .close = qtrle_decode_end,
+ .decode = qtrle_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("QuickTime Animation (RLE) video"),
};
projects / ffmpeg / blobdiff